src/plugins/unittest/fib_test.c

   1 /*
   2  * Copyright (c) 2016 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <vnet/fib/fib_test.h>
  17 #include <vnet/fib/ip6_fib.h>
  18 #include <vnet/fib/ip4_fib.h>
  19 #include <vnet/fib/mpls_fib.h>
  20 #include <vnet/adj/adj.h>
  21 #include <vnet/dpo/load_balance.h>
  22 #include <vnet/dpo/load_balance_map.h>
  23 #include <vnet/dpo/mpls_label_dpo.h>
  24 #include <vnet/dpo/lookup_dpo.h>
  25 #include <vnet/dpo/drop_dpo.h>
  26 #include <vnet/dpo/receive_dpo.h>
  27 #include <vnet/dpo/ip_null_dpo.h>
  28 #include <vnet/bfd/bfd_main.h>
  29 #include <vnet/dpo/interface_rx_dpo.h>
  30 #include <vnet/dpo/replicate_dpo.h>
  31 #include <vnet/dpo/dvr_dpo.h>
  32 #include <vnet/dpo/mpls_disposition.h>
  33 #include <vnet/dpo/punt_dpo.h>
  34
  35 #include <vnet/mpls/mpls.h>
  36
  37 #include <vnet/fib/fib_test.h>
  38 #include <vnet/fib/fib_path_list.h>
  39 #include <vnet/fib/fib_entry_src.h>
  40 #include <vnet/fib/fib_walk.h>
  41 #include <vnet/fib/fib_node_list.h>
  42 #include <vnet/fib/fib_urpf_list.h>
  43
  44 #include <vlib/unix/plugin.h>
  45
  46 // clang-format off
  47
  48 /*
  49  * Add debugs for passing tests
  50  */
  51 static int fib_test_do_debug;
  52
  53 #define FIB_TEST_I(_cond, _comment, _args...)                   \
  54 ({                                                              \
  55     int _evald = (_cond);                                       \
  56     if (!(_evald)) {                                            \
  57         fformat(stderr, "FAIL:%d: " _comment "\n",              \
  58                 __LINE__, ##_args);                             \
  59         res = 1;                                                \
  60     } else {                                                    \
  61         if (fib_test_do_debug)                                  \
  62             fformat(stderr, "PASS:%d: " _comment "\n",          \
  63                     __LINE__, ##_args);                         \
  64     }                                                           \
  65     res;                                                        \
  66 })
  67 #define FIB_TEST(_cond, _comment, _args...)                     \
  68 {                                                               \
  69     if (FIB_TEST_I(_cond, _comment, ##_args)) {                 \
  70         return 1;                                               \
  71         ASSERT(!("FAIL: " _comment));                           \
  72     }                                                           \
  73 }
  74
  75 /**
  76  * A 'i'm not fussed is this is not efficient' store of test data
  77  */
  78 typedef struct test_main_t_ {
  79     /**
  80      * HW if indicies
  81      */
  82     u32 hw_if_indicies[4];
  83     /**
  84      * HW interfaces
  85      */
  86     vnet_hw_interface_t * hw[4];
  87
  88 } test_main_t;
  89 static test_main_t test_main;
  90
  91 /* fake ethernet device class, distinct from "fake-ethX" */
  92 static u8 * format_test_interface_name (u8 * s, va_list * args)
  93 {
  94   u32 dev_instance = va_arg (*args, u32);
  95   return format (s, "test-eth%d", dev_instance);
  96 }
  97
  98 static uword placeholder_interface_tx (vlib_main_t * vm,
  99                                  vlib_node_runtime_t * node,
 100                                  vlib_frame_t * frame)
 101 {
 102     clib_warning ("you shouldn't be here, leaking buffers...");
 103     return frame->n_vectors;
 104 }
 105
 106 static clib_error_t *
 107 test_interface_admin_up_down (vnet_main_t * vnm,
 108                               u32 hw_if_index,
 109                               u32 flags)
 110 {
 111     u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
 112         VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
 113     vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
 114     return 0;
 115 }
 116
 117 VNET_DEVICE_CLASS (test_interface_device_class,static) = {
 118     .name = "Test interface",
 119     .format_device_name = format_test_interface_name,
 120     .tx_function = placeholder_interface_tx,
 121     .admin_up_down_function = test_interface_admin_up_down,
 122 };
 123
 124 static u8 *hw_address;
 125
 126 static int
 127 fib_test_mk_intf (u32 ninterfaces)
 128 {
 129     clib_error_t * error = NULL;
 130     test_main_t *tm = &test_main;
 131     u32 i, res;
 132     u8 byte;
 133
 134     res = 0;
 135     ASSERT(ninterfaces <= ARRAY_LEN(tm->hw_if_indicies));
 136
 137     for (i=0; i<6; i++)
 138     {
 139         byte = 0xd0+i;
 140         vec_add1(hw_address, byte);
 141     }
 142
 143     for (i = 0; i < ninterfaces; i++)
 144     {
 145       vnet_eth_interface_registration_t eir = {};
 146       vnet_main_t *vnm = vnet_get_main();
 147
 148         hw_address[5] = i;
 149
 150        eir.dev_class_index = test_interface_device_class.index;
 151        eir.dev_instance = i;
 152        eir.address = hw_address;
 153        tm->hw_if_indicies[i] = vnet_eth_register_interface (vnm, &eir);
 154
 155         error = vnet_hw_interface_set_flags(vnet_get_main(),
 156                                             tm->hw_if_indicies[i],
 157                                             VNET_HW_INTERFACE_FLAG_LINK_UP);
 158         tm->hw[i] = vnet_get_hw_interface(vnet_get_main(),
 159                                           tm->hw_if_indicies[i]);
 160
 161         error = vnet_sw_interface_set_flags(vnet_get_main(),
 162                                             tm->hw[i]->sw_if_index,
 163                                             VNET_SW_INTERFACE_FLAG_ADMIN_UP);
 164         FIB_TEST((NULL == error), "UP interface %d", i);
 165     }
 166     /*
 167      * re-eval after the inevitable realloc
 168      */
 169     for (i = 0; i < ninterfaces; i++)
 170     {
 171         tm->hw[i] = vnet_get_hw_interface(vnet_get_main(),
 172                                           tm->hw_if_indicies[i]);
 173     }
 174
 175     return (res);
 176 }
 177
 178 #define FIB_TEST_REC_FORW(_rec_prefix, _via_prefix, _bucket)            \
 179     {                                                                   \
 180         const dpo_id_t *_rec_dpo = fib_entry_contribute_ip_forwarding(  \
 181             fib_table_lookup_exact_match(fib_index, (_rec_prefix)));    \
 182         const dpo_id_t *_via_dpo = fib_entry_contribute_ip_forwarding(  \
 183             fib_table_lookup(fib_index, (_via_prefix)));                \
 184         FIB_TEST(!dpo_cmp(_via_dpo,                                     \
 185                           load_balance_get_bucket(_rec_dpo->dpoi_index, \
 186                                                   _bucket)),            \
 187                  "%U is recursive via %U",                              \
 188                  format_fib_prefix, (_rec_prefix),                      \
 189                  format_fib_prefix, _via_prefix);                       \
 190     }
 191
 192 #define FIB_TEST_LB_BUCKET_VIA_ADJ(_prefix, _bucket, _ai)               \
 193     {                                                                   \
 194      const dpo_id_t *_dpo = fib_entry_contribute_ip_forwarding(         \
 195                                                                fib_table_lookup_exact_match(fib_index, (_prefix))); \
 196      const dpo_id_t *_dpo1 =                                            \
 197          load_balance_get_bucket(_dpo->dpoi_index, _bucket);            \
 198      FIB_TEST(DPO_ADJACENCY == _dpo1->dpoi_type, "type is %U",          \
 199                   format_dpo_type, _dpo1->dpoi_type);                   \
 200      FIB_TEST((_ai == _dpo1->dpoi_index),                               \
 201                   "%U bucket %d resolves via %U",                       \
 202                   format_fib_prefix, (_prefix),                         \
 203                   _bucket,                                              \
 204                   format_dpo_id, _dpo1, 0);                             \
 205      }
 206
 207 #define FIB_TEST_RPF(_cond, _comment, _args...)         \
 208     {                                                   \
 209         if (FIB_TEST_I(_cond, _comment, ##_args)) {     \
 210             res = 1;                                    \
 211             goto cleanup;                               \
 212         }                                               \
 213     }
 214
 215 static int
 216 fib_test_urpf_is_equal (fib_node_index_t fei,
 217                         fib_forward_chain_type_t fct,
 218                         u32 num, ...)
 219 {
 220     dpo_id_t dpo = DPO_INVALID;
 221     fib_urpf_list_t *urpf;
 222     int ii, res;
 223     index_t ui;
 224     va_list ap;
 225
 226     va_start(ap, num);
 227
 228     res = 0;
 229     fib_entry_contribute_forwarding(fei, fct, &dpo);
 230     ui = load_balance_get_urpf(dpo.dpoi_index);
 231
 232     urpf = fib_urpf_list_get(ui);
 233
 234     FIB_TEST_RPF(num == vec_len(urpf->furpf_itfs),
 235                  "RPF:%U len %d == %d",
 236                  format_fib_urpf_list, ui,
 237                  num, vec_len(urpf->furpf_itfs));
 238     FIB_TEST_RPF(num == fib_urpf_check_size(ui),
 239                  "RPF:%U check-size %d == %d",
 240                  format_fib_urpf_list, ui,
 241                  num, vec_len(urpf->furpf_itfs));
 242
 243     for (ii = 0; ii < num; ii++)
 244     {
 245         adj_index_t ai = va_arg(ap, adj_index_t);
 246
 247         FIB_TEST_RPF(ai == urpf->furpf_itfs[ii],
 248                      "RPF:%d item:%d - %d == %d",
 249                      ui, ii, ai, urpf->furpf_itfs[ii]);
 250         FIB_TEST_RPF(fib_urpf_check(ui, ai),
 251                      "RPF:%d %d found",
 252                      ui, ai);
 253     }
 254
 255     dpo_reset(&dpo);
 256
 257 cleanup:
 258     va_end(ap);
 259
 260     return (res);
 261 }
 262
 263 static u8*
 264 fib_test_build_rewrite (u8 *eth_addr)
 265 {
 266     u8* rewrite = NULL;
 267
 268     vec_validate(rewrite, 13);
 269
 270     memcpy(rewrite, eth_addr, 6);
 271     memcpy(rewrite+6, eth_addr, 6);
 272
 273     return (rewrite);
 274 }
 275
 276 #define FIB_TEST_LB(_cond, _comment, _args...)          \
 277     {                                                   \
 278         if (FIB_TEST_I(_cond, _comment, ##_args)) {     \
 279             return (1);                                 \
 280         }                                               \
 281     }
 282
 283 int
 284 fib_test_validate_rep_v (const replicate_t *rep,
 285                          u16 n_buckets,
 286                          va_list *ap)
 287 {
 288     const fib_test_rep_bucket_t *exp;
 289     const dpo_id_t *dpo;
 290     int bucket, res;
 291
 292     res = 0;
 293     FIB_TEST_LB((n_buckets == rep->rep_n_buckets),
 294                 "n_buckets = %d", rep->rep_n_buckets);
 295
 296     for (bucket = 0; bucket < n_buckets; bucket++)
 297     {
 298         exp = va_arg(*ap, fib_test_rep_bucket_t*);
 299
 300         dpo = replicate_get_bucket_i(rep, bucket);
 301
 302         switch (exp->type)
 303         {
 304         case FT_REP_LABEL_O_ADJ:
 305             {
 306                 const mpls_label_dpo_t *mld;
 307                 mpls_label_t hdr;
 308
 309                 FIB_TEST_LB((mpls_label_dpo_get_type(MPLS_LABEL_DPO_FLAG_NONE)
 310                              == dpo->dpoi_type),
 311                             "bucket %d stacks on %U",
 312                             bucket,
 313                             format_dpo_type, dpo->dpoi_type);
 314
 315                 mld = mpls_label_dpo_get(dpo->dpoi_index);
 316                 hdr = clib_net_to_host_u32(mld->mld_hdr[0].label_exp_s_ttl);
 317
 318                 FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 319                              exp->label_o_adj.label),
 320                             "bucket %d stacks on label %d",
 321                             bucket,
 322                             exp->label_o_adj.label);
 323
 324                 FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) ==
 325                              exp->label_o_adj.eos),
 326                             "bucket %d stacks on label %d %U",
 327                             bucket,
 328                             exp->label_o_adj.label,
 329                             format_mpls_eos_bit, exp->label_o_adj.eos);
 330
 331                 FIB_TEST_LB((DPO_ADJACENCY_INCOMPLETE == mld->mld_dpo.dpoi_type),
 332                             "bucket %d label stacks on %U",
 333                             bucket,
 334                             format_dpo_type, mld->mld_dpo.dpoi_type);
 335
 336                 FIB_TEST_LB((exp->label_o_adj.adj == mld->mld_dpo.dpoi_index),
 337                             "bucket %d label stacks on adj %d",
 338                             bucket,
 339                             exp->label_o_adj.adj);
 340             }
 341             break;
 342         case FT_REP_INTF:
 343             FIB_TEST_LB((DPO_INTERFACE_RX == dpo->dpoi_type),
 344                         "bucket %d stacks on %U",
 345                         bucket,
 346                         format_dpo_type, dpo->dpoi_type);
 347
 348             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 349                         "bucket %d stacks on adj %d",
 350                         bucket,
 351                         exp->adj.adj);
 352             break;
 353         case FT_REP_DISP_MFIB_LOOKUP:
 354 //            ASSERT(0);
 355             break;
 356         }
 357     }
 358
 359     return (res);
 360 }
 361
 362 int
 363 fib_test_validate_lb_v (const load_balance_t *lb,
 364                         int n_buckets,
 365                         va_list *ap)
 366 {
 367     const dpo_id_t *dpo;
 368     int bucket, res;
 369
 370     res = 0;
 371     FIB_TEST_LB((n_buckets == lb->lb_n_buckets), "n_buckets = %d", lb->lb_n_buckets);
 372
 373     for (bucket = 0; bucket < n_buckets; bucket++)
 374     {
 375         const fib_test_lb_bucket_t *exp;
 376
 377         exp = va_arg(*ap, fib_test_lb_bucket_t*);
 378         dpo = load_balance_get_bucket_i(lb, bucket);
 379
 380         switch (exp->type)
 381         {
 382         case FT_LB_LABEL_STACK_O_ADJ:
 383             {
 384                 const mpls_label_dpo_t *mld;
 385                 mpls_label_dpo_flags_t mf;
 386                 mpls_label_t hdr;
 387                 u32 ii;
 388
 389                 mf = ((exp->label_stack_o_adj.mode ==
 390                        FIB_MPLS_LSP_MODE_UNIFORM) ?
 391                       MPLS_LABEL_DPO_FLAG_UNIFORM_MODE :
 392                       MPLS_LABEL_DPO_FLAG_NONE);
 393                 FIB_TEST_LB((mpls_label_dpo_get_type(mf) == dpo->dpoi_type),
 394                            "bucket %d stacks on %U",
 395                            bucket,
 396                            format_dpo_type, dpo->dpoi_type);
 397
 398                 mld = mpls_label_dpo_get(dpo->dpoi_index);
 399
 400                 FIB_TEST_LB(exp->label_stack_o_adj.label_stack_size == mld->mld_n_labels,
 401                             "label stack size",
 402                             mld->mld_n_labels);
 403
 404                 for (ii = 0; ii < mld->mld_n_labels; ii++)
 405                 {
 406                     hdr = clib_net_to_host_u32(mld->mld_hdr[ii].label_exp_s_ttl);
 407                     FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 408                                  exp->label_stack_o_adj.label_stack[ii]),
 409                                 "bucket %d stacks on label %d",
 410                                 bucket,
 411                                 exp->label_stack_o_adj.label_stack[ii]);
 412
 413                     if (ii == mld->mld_n_labels-1)
 414                     {
 415                         FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) ==
 416                                      exp->label_o_adj.eos),
 417                                     "bucket %d stacks on label %d %U!=%U",
 418                                     bucket,
 419                                     exp->label_stack_o_adj.label_stack[ii],
 420                                     format_mpls_eos_bit, exp->label_o_adj.eos,
 421                                     format_mpls_eos_bit, vnet_mpls_uc_get_s(hdr));
 422                     }
 423                     else
 424                     {
 425                         FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) == MPLS_NON_EOS),
 426                                     "bucket %d stacks on label %d %U",
 427                                     bucket,
 428                                     exp->label_stack_o_adj.label_stack[ii],
 429                                     format_mpls_eos_bit, vnet_mpls_uc_get_s(hdr));
 430                     }
 431                 }
 432
 433                 FIB_TEST_LB((DPO_ADJACENCY_INCOMPLETE == mld->mld_dpo.dpoi_type),
 434                             "bucket %d label stacks on %U",
 435                             bucket,
 436                             format_dpo_type, mld->mld_dpo.dpoi_type);
 437
 438                 FIB_TEST_LB((exp->label_stack_o_adj.adj == mld->mld_dpo.dpoi_index),
 439                             "bucket %d label stacks on adj %d",
 440                             bucket,
 441                             exp->label_stack_o_adj.adj);
 442             }
 443             break;
 444         case FT_LB_LABEL_CHAIN_O_ADJ:
 445             {
 446                 const mpls_label_dpo_t *mld = NULL;
 447                 mpls_label_dpo_flags_t mf;
 448                 mpls_label_t hdr;
 449                 u32 ii;
 450
 451                 mf = ((exp->label_chain_o_adj.mode ==
 452                        FIB_MPLS_LSP_MODE_UNIFORM) ?
 453                       MPLS_LABEL_DPO_FLAG_UNIFORM_MODE :
 454                       MPLS_LABEL_DPO_FLAG_NONE);
 455
 456                 for (ii = 0; ii < exp->label_chain_o_adj.label_chain_size; ii++)
 457                 {
 458                     FIB_TEST_LB((mpls_label_dpo_get_type(mf) == dpo->dpoi_type),
 459                                 "bucket %d stacks on %U",
 460                                 bucket,
 461                                 format_dpo_type, dpo->dpoi_type);
 462                     mld = mpls_label_dpo_get(dpo->dpoi_index);
 463
 464                     hdr = clib_net_to_host_u32(mld->mld_hdr[0].label_exp_s_ttl);
 465                     FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 466                                  exp->label_chain_o_adj.label_chain[ii]),
 467                                 "bucket %d stacks on label %d",
 468                                 bucket,
 469                                 exp->label_chain_o_adj.label_chain[ii]);
 470                     dpo = &mld->mld_dpo;
 471                 }
 472
 473                 FIB_TEST_LB((DPO_ADJACENCY_INCOMPLETE == mld->mld_dpo.dpoi_type),
 474                             "bucket %d label stacks on %U",
 475                             bucket,
 476                             format_dpo_type, mld->mld_dpo.dpoi_type);
 477
 478                 FIB_TEST_LB((exp->label_chain_o_adj.adj == mld->mld_dpo.dpoi_index),
 479                             "bucket %d label stacks on adj %d",
 480                             bucket,
 481                             exp->label_chain_o_adj.adj);
 482             }
 483             break;
 484         case FT_LB_LABEL_O_ADJ:
 485             {
 486                 const mpls_label_dpo_t *mld;
 487                 mpls_label_t hdr;
 488                 FIB_TEST_LB((mpls_label_dpo_get_type(MPLS_LABEL_DPO_FLAG_NONE)
 489                              == dpo->dpoi_type),
 490                            "bucket %d stacks on %U",
 491                            bucket,
 492                            format_dpo_type, dpo->dpoi_type);
 493
 494                 mld = mpls_label_dpo_get(dpo->dpoi_index);
 495                 hdr = clib_net_to_host_u32(mld->mld_hdr[0].label_exp_s_ttl);
 496
 497                 FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 498                              exp->label_o_adj.label),
 499                             "bucket %d stacks on label %d not %d",
 500                             bucket,
 501                             vnet_mpls_uc_get_label(hdr),
 502                             exp->label_o_adj.label);
 503
 504                 FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) ==
 505                              exp->label_o_adj.eos),
 506                             "bucket %d stacks on label %d %U",
 507                             bucket,
 508                             exp->label_o_adj.label,
 509                             format_mpls_eos_bit, exp->label_o_adj.eos);
 510
 511                 FIB_TEST_LB((DPO_ADJACENCY_INCOMPLETE == mld->mld_dpo.dpoi_type),
 512                             "bucket %d label stacks on %U",
 513                             bucket,
 514                             format_dpo_type, mld->mld_dpo.dpoi_type);
 515
 516                 FIB_TEST_LB((exp->label_o_adj.adj == mld->mld_dpo.dpoi_index),
 517                             "bucket %d label stacks on adj %d",
 518                             bucket,
 519                             exp->label_o_adj.adj);
 520             }
 521             break;
 522         case FT_LB_LABEL_O_LB:
 523             {
 524                 const mpls_label_dpo_t *mld;
 525                 mpls_label_dpo_flags_t mf;
 526                 mpls_label_t hdr;
 527
 528                 mf = ((exp->label_o_lb.mode ==
 529                        FIB_MPLS_LSP_MODE_UNIFORM) ?
 530                       MPLS_LABEL_DPO_FLAG_UNIFORM_MODE :
 531                       MPLS_LABEL_DPO_FLAG_NONE);
 532                 FIB_TEST_LB((mpls_label_dpo_get_type(mf) == dpo->dpoi_type),
 533                            "bucket %d stacks on %U",
 534                            bucket,
 535                            format_dpo_type, dpo->dpoi_type);
 536
 537                 mld = mpls_label_dpo_get(dpo->dpoi_index);
 538                 hdr = clib_net_to_host_u32(mld->mld_hdr[0].label_exp_s_ttl);
 539
 540                 FIB_TEST_LB(1 == mld->mld_n_labels, "label stack size",
 541                             mld->mld_n_labels);
 542                 FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 543                              exp->label_o_lb.label),
 544                             "bucket %d stacks on label %d",
 545                             bucket,
 546                             exp->label_o_lb.label);
 547
 548                 FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) ==
 549                              exp->label_o_lb.eos),
 550                             "bucket %d stacks on label %d %U",
 551                             bucket,
 552                             exp->label_o_lb.label,
 553                             format_mpls_eos_bit, exp->label_o_lb.eos);
 554
 555                 FIB_TEST_LB((DPO_LOAD_BALANCE == mld->mld_dpo.dpoi_type),
 556                             "bucket %d label stacks on %U",
 557                             bucket,
 558                             format_dpo_type, mld->mld_dpo.dpoi_type);
 559
 560                 FIB_TEST_LB((exp->label_o_lb.lb == mld->mld_dpo.dpoi_index),
 561                             "bucket %d label stacks on LB %d",
 562                             bucket,
 563                             exp->label_o_lb.lb);
 564             }
 565             break;
 566         case FT_LB_ADJ:
 567             res = FIB_TEST_I(((DPO_ADJACENCY == dpo->dpoi_type) ||
 568                               (DPO_ADJACENCY_INCOMPLETE == dpo->dpoi_type)),
 569                              "bucket %d stacks on %U",
 570                              bucket,
 571                              format_dpo_type, dpo->dpoi_type);
 572             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 573                         "bucket %d stacks on adj %d",
 574                         bucket,
 575                         exp->adj.adj);
 576             break;
 577         case FT_LB_MPLS_DISP_PIPE_O_ADJ:
 578         {
 579             const mpls_disp_dpo_t *mdd;
 580
 581             res = FIB_TEST_I((DPO_MPLS_DISPOSITION_PIPE == dpo->dpoi_type),
 582                        "bucket %d stacks on %U",
 583                        bucket,
 584                        format_dpo_type, dpo->dpoi_type);
 585
 586             mdd = mpls_disp_dpo_get(dpo->dpoi_index);
 587
 588             dpo = &mdd->mdd_dpo;
 589
 590             res = FIB_TEST_I(((DPO_ADJACENCY == dpo->dpoi_type) ||
 591                               (DPO_ADJACENCY_INCOMPLETE == dpo->dpoi_type)),
 592                             "bucket %d stacks on %U",
 593                              bucket,
 594                              format_dpo_type, dpo->dpoi_type);
 595             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 596                         "bucket %d stacks on adj %d",
 597                         bucket,
 598                         exp->adj.adj);
 599             break;
 600         }
 601         case FT_LB_INTF:
 602             res = FIB_TEST_I((DPO_INTERFACE_RX == dpo->dpoi_type),
 603                              "bucket %d stacks on %U",
 604                              bucket,
 605                              format_dpo_type, dpo->dpoi_type);
 606             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 607                         "bucket %d stacks on adj %d",
 608                         bucket,
 609                         exp->adj.adj);
 610             break;
 611         case FT_LB_L2:
 612             res = FIB_TEST_I((DPO_DVR == dpo->dpoi_type),
 613                              "bucket %d stacks on %U",
 614                              bucket,
 615                              format_dpo_type, dpo->dpoi_type);
 616             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 617                         "bucket %d stacks on adj %d",
 618                         bucket,
 619                         exp->adj.adj);
 620             break;
 621         case FT_LB_O_LB:
 622             res = FIB_TEST_I((DPO_LOAD_BALANCE == dpo->dpoi_type),
 623                              "bucket %d stacks on %U",
 624                              bucket,
 625                              format_dpo_type, dpo->dpoi_type);
 626             FIB_TEST_LB((exp->lb.lb == dpo->dpoi_index),
 627                         "bucket %d stacks on lb %d not %d",
 628                         bucket,
 629                         dpo->dpoi_index,
 630                         exp->lb.lb);
 631             break;
 632         case FT_LB_BIER_TABLE:
 633             FIB_TEST_LB((DPO_BIER_TABLE == dpo->dpoi_type),
 634                         "bucket %d stacks on %U",
 635                         bucket,
 636                         format_dpo_type, dpo->dpoi_type);
 637             FIB_TEST_LB((exp->bier.table == dpo->dpoi_index),
 638                         "bucket %d stacks on lb %d",
 639                         bucket,
 640                         exp->bier.table);
 641             break;
 642         case FT_LB_BIER_FMASK:
 643             FIB_TEST_LB((DPO_BIER_FMASK == dpo->dpoi_type),
 644                         "bucket %d stacks on %U",
 645                         bucket,
 646                         format_dpo_type, dpo->dpoi_type);
 647             FIB_TEST_LB((exp->bier.fmask == dpo->dpoi_index),
 648                         "bucket %d stacks on lb %d",
 649                         bucket,
 650                         exp->bier.fmask);
 651             break;
 652         case FT_LB_DROP:
 653             FIB_TEST_LB((DPO_DROP == dpo->dpoi_type),
 654                         "bucket %d stacks on %U",
 655                         bucket,
 656                         format_dpo_type, dpo->dpoi_type);
 657             break;
 658         case FT_LB_PUNT:
 659             FIB_TEST_LB((DPO_PUNT == dpo->dpoi_type),
 660                         "bucket %d stacks on %U",
 661                         bucket,
 662                         format_dpo_type, dpo->dpoi_type);
 663             break;
 664         }
 665     }
 666     return (res);
 667 }
 668
 669 int
 670 fib_test_validate_lb (const dpo_id_t *dpo,
 671                       int n_buckets,
 672                       ...)
 673 {
 674     const load_balance_t *lb;
 675     va_list ap;
 676     int res;
 677
 678     res = 0;
 679     va_start(ap, n_buckets);
 680
 681     if (!FIB_TEST_I((DPO_LOAD_BALANCE == dpo->dpoi_type),
 682                     "Entry links to %U",
 683                     format_dpo_type, dpo->dpoi_type))
 684     {
 685         lb = load_balance_get(dpo->dpoi_index);
 686
 687         res = fib_test_validate_lb_v(lb, n_buckets, &ap);
 688     }
 689     else
 690     {
 691         res = 1;
 692     }
 693
 694     va_end(ap);
 695
 696     return (res);
 697 }
 698
 699 int
 700 fib_test_validate_entry (fib_node_index_t fei,
 701                          fib_forward_chain_type_t fct,
 702                          int n_buckets,
 703                          ...)
 704 {
 705     dpo_id_t dpo = DPO_INVALID;
 706     const fib_prefix_t *pfx;
 707     index_t fw_lbi;
 708     u32 fib_index;
 709     va_list ap;
 710     int res;
 711
 712
 713     res = 0;
 714     pfx = fib_entry_get_prefix(fei);
 715     fib_index = fib_entry_get_fib_index(fei);
 716     fib_entry_contribute_forwarding(fei, fct, &dpo);
 717
 718     if (DPO_REPLICATE == dpo.dpoi_type)
 719     {
 720         const replicate_t *rep;
 721
 722         va_start(ap, n_buckets);
 723         rep = replicate_get(dpo.dpoi_index);
 724         res = fib_test_validate_rep_v(rep, n_buckets, &ap);
 725         va_end (ap);
 726     }
 727     else
 728     {
 729         const load_balance_t *lb;
 730
 731         FIB_TEST_LB((DPO_LOAD_BALANCE == dpo.dpoi_type),
 732                     "%U Entry links to %U",
 733                     format_fib_prefix, pfx,
 734                     format_dpo_type, dpo.dpoi_type);
 735
 736         va_start(ap, n_buckets);
 737         lb = load_balance_get(dpo.dpoi_index);
 738         res = fib_test_validate_lb_v(lb, n_buckets, &ap);
 739         va_end(ap);
 740
 741         /*
 742          * ensure that the LB contributed by the entry is the
 743          * same as the LB in the forwarding tables
 744          */
 745         if (fct == fib_entry_get_default_chain_type(fib_entry_get(fei)))
 746         {
 747             switch (pfx->fp_proto)
 748             {
 749             case FIB_PROTOCOL_IP4:
 750                 fw_lbi = ip4_fib_forwarding_lookup(fib_index, &pfx->fp_addr.ip4);
 751                 break;
 752             case FIB_PROTOCOL_IP6:
 753                 fw_lbi = ip6_fib_table_fwding_lookup(fib_index, &pfx->fp_addr.ip6);
 754                 break;
 755             case FIB_PROTOCOL_MPLS:
 756                 {
 757                     mpls_unicast_header_t hdr = {
 758                         .label_exp_s_ttl = 0,
 759                     };
 760
 761                     vnet_mpls_uc_set_label(&hdr.label_exp_s_ttl, pfx->fp_label);
 762                     vnet_mpls_uc_set_s(&hdr.label_exp_s_ttl, pfx->fp_eos);
 763                     hdr.label_exp_s_ttl = clib_host_to_net_u32(hdr.label_exp_s_ttl);
 764
 765                     fw_lbi = mpls_fib_table_forwarding_lookup(fib_index, &hdr);
 766                     break;
 767                 }
 768             default:
 769                 fw_lbi = 0;
 770             }
 771             FIB_TEST_LB((fw_lbi == dpo.dpoi_index),
 772                         "Contributed LB = FW LB:\n fwd:%U\n cont:%U",
 773                         format_load_balance, fw_lbi, 0,
 774                         format_load_balance, dpo.dpoi_index, 0);
 775         }
 776     }
 777
 778     dpo_reset(&dpo);
 779
 780     return (res);
 781 }
 782
 783 static int
 784 fib_test_v4 (void)
 785 {
 786     /*
 787      * In the default table check for the presence and correct forwarding
 788      * of the special entries
 789      */
 790     fib_node_index_t dfrt, fei, ai, ai2, locked_ai, ai_01, ai_02, ai_03;
 791     const dpo_id_t *dpo, *dpo1, *dpo2, *dpo_drop;
 792     const ip_adjacency_t *adj;
 793     const load_balance_t *lb;
 794     test_main_t *tm;
 795     u32 fib_index;
 796     int lb_count;
 797     int ii, res;
 798
 799     res = 0;
 800     /* via 10.10.10.1 */
 801     ip46_address_t nh_10_10_10_1 = {
 802         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
 803     };
 804     /* via 10.10.10.2 */
 805     ip46_address_t nh_10_10_10_2 = {
 806         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
 807     };
 808
 809     FIB_TEST((0 == pool_elts(load_balance_map_pool)), "LB-map pool size is %d",
 810              pool_elts(load_balance_map_pool));
 811
 812     tm = &test_main;
 813
 814     /* record the nubmer of load-balances in use before we start */
 815     lb_count = pool_elts(load_balance_pool);
 816
 817     /* Find or create FIB table 11 */
 818     fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, 11,
 819                                                   FIB_SOURCE_API);
 820
 821     for (ii = 0; ii < 4; ii++)
 822       fib_table_bind (FIB_PROTOCOL_IP4, tm->hw[ii]->sw_if_index, fib_index);
 823
 824     fib_prefix_t pfx_0_0_0_0_s_0 = {
 825         .fp_len = 0,
 826         .fp_proto = FIB_PROTOCOL_IP4,
 827         .fp_addr = {
 828             .ip4 = {
 829                 {0}
 830             },
 831         },
 832     };
 833
 834     fib_prefix_t pfx = {
 835         .fp_len = 0,
 836         .fp_proto = FIB_PROTOCOL_IP4,
 837         .fp_addr = {
 838             .ip4 = {
 839                 {0}
 840             },
 841         },
 842     };
 843
 844     dpo_drop = drop_dpo_get(DPO_PROTO_IP4);
 845
 846     dfrt = fib_table_lookup(fib_index, &pfx_0_0_0_0_s_0);
 847     FIB_TEST((FIB_NODE_INDEX_INVALID != dfrt), "default route present");
 848     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(dfrt)),
 849              "Default route is DROP");
 850
 851     pfx.fp_len = 32;
 852     fei = fib_table_lookup(fib_index, &pfx);
 853     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "all zeros route present");
 854     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
 855              "all 0s route is DROP");
 856
 857     pfx.fp_addr.ip4.as_u32 = clib_host_to_net_u32(0xffffffff);
 858     pfx.fp_len = 32;
 859     fei = fib_table_lookup(fib_index, &pfx);
 860     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "all ones route present");
 861     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
 862              "all 1s route is DROP");
 863
 864     pfx.fp_addr.ip4.as_u32 = clib_host_to_net_u32(0xe0000000);
 865     pfx.fp_len = 8;
 866     fei = fib_table_lookup(fib_index, &pfx);
 867     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "all-mcast route present");
 868     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
 869              "all-mcast route is DROP");
 870
 871     pfx.fp_addr.ip4.as_u32 = clib_host_to_net_u32(0xf0000000);
 872     pfx.fp_len = 8;
 873     fei = fib_table_lookup(fib_index, &pfx);
 874     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "class-e route present");
 875     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
 876              "class-e route is DROP");
 877
 878     /*
 879      * at this stage there are 5 entries in the test FIB (plus 5 in the default),
 880      * all of which are special sourced and so none of which share path-lists.
 881      * There are also 2 entries, and 2 non-shared path-lists, in the v6 default
 882      * table, and 4 path-lists in the v6 MFIB table and 2 in v4.
 883      */
 884 #define ENBR (5+5+2)
 885
 886     u32 PNBR = 5+5+2+4+2;
 887
 888     /*
 889      * if the IGMP plugin is loaded this adds two more entries to the v4 MFIB
 890      */
 891     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
 892     FIB_TEST((PNBR == fib_path_list_pool_size()), "path list pool size is %d",
 893              fib_path_list_pool_size());
 894     FIB_TEST((ENBR == fib_entry_pool_size()), "entry pool size is %d",
 895              fib_entry_pool_size());
 896
 897     /*
 898      * add interface routes.
 899      *  validate presence of /24 attached and /32 recieve.
 900      *  test for the presence of the receive address in the glean and local adj
 901      */
 902     fib_prefix_t local_pfx = {
 903         .fp_len = 24,
 904         .fp_proto = FIB_PROTOCOL_IP4,
 905         .fp_addr = {
 906             .ip4 = {
 907                 .as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
 908             },
 909         },
 910     };
 911
 912     fib_table_entry_update_one_path(fib_index, &local_pfx,
 913                                     FIB_SOURCE_INTERFACE,
 914                                     (FIB_ENTRY_FLAG_CONNECTED |
 915                                      FIB_ENTRY_FLAG_ATTACHED),
 916                                     DPO_PROTO_IP4,
 917                                     NULL,
 918                                     tm->hw[0]->sw_if_index,
 919                                     ~0, // invalid fib index
 920                                     1, // weight
 921                                     NULL,
 922                                     FIB_ROUTE_PATH_FLAG_NONE);
 923     fei = fib_table_lookup(fib_index, &local_pfx);
 924     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached interface route present");
 925     FIB_TEST(((FIB_ENTRY_FLAG_ATTACHED | FIB_ENTRY_FLAG_CONNECTED) ==
 926               fib_entry_get_flags(fei)),
 927              "Flags set on attached interface");
 928
 929     ai = fib_entry_get_adj(fei);
 930     FIB_TEST((FIB_NODE_INDEX_INVALID != ai),
 931              "attached interface route adj present %d", ai);
 932     adj = adj_get(ai);
 933     FIB_TEST((IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index),
 934              "attached interface adj is glean");
 935
 936     local_pfx.fp_len = 32;
 937     fib_table_entry_update_one_path(fib_index, &local_pfx,
 938                                     FIB_SOURCE_INTERFACE,
 939                                     (FIB_ENTRY_FLAG_CONNECTED |
 940                                      FIB_ENTRY_FLAG_LOCAL),
 941                                     DPO_PROTO_IP4,
 942                                     NULL,
 943                                     tm->hw[0]->sw_if_index,
 944                                     ~0, // invalid fib index
 945                                     1, // weight
 946                                     NULL,
 947                                     FIB_ROUTE_PATH_FLAG_NONE);
 948     fei = fib_table_lookup(fib_index, &local_pfx);
 949     FIB_TEST(((FIB_ENTRY_FLAG_LOCAL | FIB_ENTRY_FLAG_CONNECTED) ==
 950               fib_entry_get_flags(fei)),
 951              "Flags set on local interface");
 952
 953     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local interface route present");
 954
 955     dpo = fib_entry_contribute_ip_forwarding(fei);
 956     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 0),
 957              "RPF list for local length 0");
 958     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
 959     FIB_TEST((DPO_RECEIVE == dpo->dpoi_type),
 960              "local interface adj is local");
 961     receive_dpo_t *rd = receive_dpo_get(dpo->dpoi_index);
 962
 963     FIB_TEST((0 == ip46_address_cmp(&local_pfx.fp_addr,
 964                                     &rd->rd_addr)),
 965              "local interface adj is receive ok");
 966
 967     FIB_TEST((2 == fib_table_get_num_entries(fib_index,
 968                                              FIB_PROTOCOL_IP4,
 969                                              FIB_SOURCE_INTERFACE)),
 970              "2 Interface Source'd prefixes");
 971     FIB_TEST((0 == ip46_address_cmp(&local_pfx.fp_addr,
 972                                     &adj->sub_type.glean.rx_pfx.fp_addr)),
 973              "attached interface adj is receive ok");
 974
 975     /*
 976      * +2 interface routes +2 non-shared path-lists
 977      */
 978     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
 979     FIB_TEST((PNBR+2 == fib_path_list_pool_size()), "path list pool size is%d",
 980              fib_path_list_pool_size());
 981     FIB_TEST((ENBR+2 == fib_entry_pool_size()), "entry pool size is %d",
 982              fib_entry_pool_size());
 983
 984     /*
 985      * Modify the default route to be via an adj not yet known.
 986      * this sources the defalut route with the API source, which is
 987      * a higher preference to the DEFAULT_ROUTE source
 988      */
 989     pfx.fp_addr.ip4.as_u32 = 0;
 990     pfx.fp_len = 0;
 991     fib_table_entry_path_add(fib_index, &pfx,
 992                              FIB_SOURCE_API,
 993                              FIB_ENTRY_FLAG_NONE,
 994                              DPO_PROTO_IP4,
 995                              &nh_10_10_10_1,
 996                              tm->hw[0]->sw_if_index,
 997                              ~0, // invalid fib index
 998                              1,
 999                              NULL,
1000                              FIB_ROUTE_PATH_FLAG_NONE);
1001     fei = fib_table_lookup(fib_index, &pfx);
1002     FIB_TEST((FIB_ENTRY_FLAG_NONE == fib_entry_get_flags(fei)),
1003              "Flags set on API route");
1004
1005     FIB_TEST((fei == dfrt), "default route same index");
1006     ai = fib_entry_get_adj(fei);
1007     FIB_TEST((FIB_NODE_INDEX_INVALID != ai), "default route adj present");
1008     adj = adj_get(ai);
1009     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
1010              "adj is incomplete");
1011     FIB_TEST((0 == ip46_address_cmp(&nh_10_10_10_1, &adj->sub_type.nbr.next_hop)),
1012              "adj nbr next-hop ok");
1013     FIB_TEST((1 == fib_table_get_num_entries(fib_index,
1014                                              FIB_PROTOCOL_IP4,
1015                                              FIB_SOURCE_API)),
1016              "1 API Source'd prefixes");
1017
1018     /*
1019      * find the adj in the shared db
1020      */
1021     locked_ai = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
1022                                     VNET_LINK_IP4,
1023                                     &nh_10_10_10_1,
1024                                     tm->hw[0]->sw_if_index);
1025     FIB_TEST((locked_ai == ai), "ADJ NBR DB find");
1026     adj_unlock(locked_ai);
1027
1028     /*
1029      * +1 shared path-list
1030      */
1031     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
1032              fib_path_list_db_size());
1033     FIB_TEST((PNBR+3 == fib_path_list_pool_size()), "path list pool size is%d",
1034              fib_path_list_pool_size());
1035     FIB_TEST((ENBR+2 == fib_entry_pool_size()), "entry pool size is %d",
1036              fib_entry_pool_size());
1037
1038     /*
1039      * remove the API source from the default route. We expected
1040      * the route to remain, sourced by DEFAULT_ROUTE, and hence a DROP
1041      */
1042     pfx.fp_addr.ip4.as_u32 = 0;
1043     pfx.fp_len = 0;
1044     fib_table_entry_path_remove(fib_index, &pfx,
1045                                 FIB_SOURCE_API,
1046                                 DPO_PROTO_IP4,
1047                                 &nh_10_10_10_1,
1048                                 tm->hw[0]->sw_if_index,
1049                                 ~0, // non-recursive path, so no FIB index
1050                                 1,
1051                                 FIB_ROUTE_PATH_FLAG_NONE);
1052
1053     fei = fib_table_lookup(fib_index, &pfx);
1054
1055     FIB_TEST((fei == dfrt), "default route same index");
1056     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
1057              "Default route is DROP");
1058
1059     /*
1060      * -1 shared-path-list
1061      */
1062     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
1063     FIB_TEST((PNBR+2 == fib_path_list_pool_size()), "path list pool size is%d",
1064              fib_path_list_pool_size());
1065     FIB_TEST((ENBR+2 == fib_entry_pool_size()), "entry pool size is %d",
1066              fib_entry_pool_size());
1067
1068     /*
1069      * Add an 2 ARP entry => a complete ADJ plus adj-fib.
1070      */
1071     fib_prefix_t pfx_10_10_10_1_s_32 = {
1072         .fp_len = 32,
1073         .fp_proto = FIB_PROTOCOL_IP4,
1074         .fp_addr = {
1075             /* 10.10.10.1 */
1076             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
1077         },
1078     };
1079     fib_prefix_t pfx_10_10_10_2_s_32 = {
1080         .fp_len = 32,
1081         .fp_proto = FIB_PROTOCOL_IP4,
1082         .fp_addr = {
1083             /* 10.10.10.2 */
1084             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
1085         },
1086     };
1087     fib_prefix_t pfx_11_11_11_11_s_32 = {
1088         .fp_len = 32,
1089         .fp_proto = FIB_PROTOCOL_IP4,
1090         .fp_addr = {
1091             /* 11.11.11.11 */
1092             .ip4.as_u32 = clib_host_to_net_u32(0x0b0b0b0b),
1093         },
1094     };
1095     u8 eth_addr[] = {
1096         0xde, 0xde, 0xde, 0xba, 0xba, 0xba,
1097     };
1098
1099     ip46_address_t nh_12_12_12_12 = {
1100         .ip4.as_u32 = clib_host_to_net_u32(0x0c0c0c0c),
1101     };
1102     adj_index_t ai_12_12_12_12;
1103
1104     /*
1105      * Add a route via an incomplete ADJ. then complete the ADJ
1106      * Expect the route LB is updated to use complete adj type.
1107      */
1108     fei = fib_table_entry_update_one_path(fib_index,
1109                                           &pfx_11_11_11_11_s_32,
1110                                           FIB_SOURCE_API,
1111                                           FIB_ENTRY_FLAG_ATTACHED,
1112                                           DPO_PROTO_IP4,
1113                                           &pfx_10_10_10_1_s_32.fp_addr,
1114                                           tm->hw[0]->sw_if_index,
1115                                           ~0, // invalid fib index
1116                                           1,
1117                                           NULL,
1118                                           FIB_ROUTE_PATH_FLAG_NONE);
1119
1120     dpo = fib_entry_contribute_ip_forwarding(fei);
1121     dpo1 = load_balance_get_bucket(dpo->dpoi_index, 0);
1122     FIB_TEST(DPO_ADJACENCY_INCOMPLETE == dpo1->dpoi_type,
1123              "11.11.11.11/32 via incomplete adj");
1124
1125     ai_01 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
1126                                 VNET_LINK_IP4,
1127                                 &pfx_10_10_10_1_s_32.fp_addr,
1128                                 tm->hw[0]->sw_if_index);
1129     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_01), "adj created");
1130     adj = adj_get(ai_01);
1131     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
1132              "adj is incomplete");
1133     FIB_TEST((0 == ip46_address_cmp(&pfx_10_10_10_1_s_32.fp_addr,
1134                                     &adj->sub_type.nbr.next_hop)),
1135              "adj nbr next-hop ok");
1136
1137     adj_nbr_update_rewrite(ai_01, ADJ_NBR_REWRITE_FLAG_COMPLETE,
1138                            fib_test_build_rewrite(eth_addr));
1139     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
1140              "adj is complete");
1141     FIB_TEST((0 == ip46_address_cmp(&pfx_10_10_10_1_s_32.fp_addr,
1142                                     &adj->sub_type.nbr.next_hop)),
1143              "adj nbr next-hop ok");
1144     ai = fib_entry_get_adj(fei);
1145     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj");
1146
1147     dpo = fib_entry_contribute_ip_forwarding(fei);
1148     dpo1 = load_balance_get_bucket(dpo->dpoi_index, 0);
1149     FIB_TEST(DPO_ADJACENCY == dpo1->dpoi_type,
1150              "11.11.11.11/32 via complete adj");
1151     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1,
1152                                     tm->hw[0]->sw_if_index),
1153              "RPF list for adj-fib contains adj");
1154
1155     ai_12_12_12_12 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
1156                                          VNET_LINK_IP4,
1157                                          &nh_12_12_12_12,
1158                                          tm->hw[1]->sw_if_index);
1159     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_12_12_12_12), "adj created");
1160     adj = adj_get(ai_12_12_12_12);
1161     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
1162              "adj is incomplete");
1163     FIB_TEST((0 == ip46_address_cmp(&nh_12_12_12_12,
1164                                     &adj->sub_type.nbr.next_hop)),
1165              "adj nbr next-hop ok");
1166     adj_nbr_update_rewrite(ai_12_12_12_12, ADJ_NBR_REWRITE_FLAG_COMPLETE,
1167                            fib_test_build_rewrite(eth_addr));
1168     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
1169              "adj is complete");
1170
1171     /*
1172      * add the adj fib
1173      */
1174     fei = fib_table_entry_path_add(fib_index,
1175                                    &pfx_10_10_10_1_s_32,
1176                                    FIB_SOURCE_ADJ,
1177                                    FIB_ENTRY_FLAG_ATTACHED,
1178                                    DPO_PROTO_IP4,
1179                                    &pfx_10_10_10_1_s_32.fp_addr,
1180                                    tm->hw[0]->sw_if_index,
1181                                    ~0, // invalid fib index
1182                                    1,
1183                                    NULL,
1184                                    FIB_ROUTE_PATH_FLAG_NONE);
1185     FIB_TEST((FIB_ENTRY_FLAG_ATTACHED  == fib_entry_get_flags(fei)),
1186              "Flags set on adj-fib");
1187     ai = fib_entry_get_adj(fei);
1188     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj, %d", ai);
1189
1190     fib_table_entry_path_remove(fib_index,
1191                                 &pfx_11_11_11_11_s_32,
1192                                 FIB_SOURCE_API,
1193                                 DPO_PROTO_IP4,
1194                                 &pfx_10_10_10_1_s_32.fp_addr,
1195                                 tm->hw[0]->sw_if_index,
1196                                 ~0, // invalid fib index
1197                                 1,
1198                                 FIB_ROUTE_PATH_FLAG_NONE);
1199
1200     eth_addr[5] = 0xb2;
1201
1202     ai_02 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
1203                                 VNET_LINK_IP4,
1204                                 &pfx_10_10_10_2_s_32.fp_addr,
1205                                 tm->hw[0]->sw_if_index);
1206     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_02), "adj created");
1207     adj = adj_get(ai_02);
1208     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
1209              "adj is incomplete");
1210     FIB_TEST((0 == ip46_address_cmp(&pfx_10_10_10_2_s_32.fp_addr,
1211                                     &adj->sub_type.nbr.next_hop)),
1212              "adj nbr next-hop ok");
1213
1214     adj_nbr_update_rewrite(ai_02, ADJ_NBR_REWRITE_FLAG_COMPLETE,
1215                            fib_test_build_rewrite(eth_addr));
1216     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
1217              "adj is complete");
1218     FIB_TEST((0 == ip46_address_cmp(&pfx_10_10_10_2_s_32.fp_addr,
1219                                     &adj->sub_type.nbr.next_hop)),
1220              "adj nbr next-hop ok");
1221     FIB_TEST((ai_01 != ai_02), "ADJs are different");
1222
1223     fib_table_entry_path_add(fib_index,
1224                              &pfx_10_10_10_2_s_32,
1225                              FIB_SOURCE_ADJ,
1226                              FIB_ENTRY_FLAG_ATTACHED,
1227                              DPO_PROTO_IP4,
1228                              &pfx_10_10_10_2_s_32.fp_addr,
1229                              tm->hw[0]->sw_if_index,
1230                              ~0, // invalid fib index
1231                              1,
1232                              NULL,
1233                              FIB_ROUTE_PATH_FLAG_NONE);
1234
1235     fei = fib_table_lookup(fib_index, &pfx_10_10_10_2_s_32);
1236     ai = fib_entry_get_adj(fei);
1237     FIB_TEST((ai_02 == ai), "ADJ-FIB resolves via adj");
1238
1239     /*
1240      * +2 adj-fibs, and their non-shared path-lists
1241      */
1242     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
1243     FIB_TEST((PNBR+4 == fib_path_list_pool_size()), "path list pool size is %d",
1244              fib_path_list_pool_size());
1245     FIB_TEST((ENBR+4 == fib_entry_pool_size()), "entry pool size is %d",
1246              fib_entry_pool_size());
1247
1248     /*
1249      * Add 2 routes via the first ADJ. ensure path-list sharing
1250      */
1251     fib_prefix_t pfx_1_1_1_1_s_32 = {
1252         .fp_len = 32,
1253         .fp_proto = FIB_PROTOCOL_IP4,
1254         .fp_addr = {
1255             /* 1.1.1.1/32 */
1256             .ip4.as_u32 = clib_host_to_net_u32(0x01010101),
1257         },
1258     };
1259
1260     fib_table_entry_path_add(fib_index,
1261                              &pfx_1_1_1_1_s_32,
1262                              FIB_SOURCE_API,
1263                              FIB_ENTRY_FLAG_NONE,
1264                              DPO_PROTO_IP4,
1265                              &nh_10_10_10_1,
1266                              tm->hw[0]->sw_if_index,
1267                              ~0, // invalid fib index
1268                              1,
1269                              NULL,
1270                              FIB_ROUTE_PATH_FLAG_NONE);
1271     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
1272     ai = fib_entry_get_adj(fei);
1273     FIB_TEST((ai_01 == ai), "1.1.1.1 resolves via 10.10.10.1");
1274
1275     /*
1276      * +1 entry and a shared path-list
1277      */
1278     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB is empty");
1279     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
1280              fib_path_list_pool_size());
1281     FIB_TEST((ENBR+5 == fib_entry_pool_size()), "entry pool size is %d",
1282              fib_entry_pool_size());
1283
1284     /* 1.1.2.0/24 */
1285     fib_prefix_t pfx_1_1_2_0_s_24 = {
1286         .fp_len = 24,
1287         .fp_proto = FIB_PROTOCOL_IP4,
1288         .fp_addr = {
1289             .ip4.as_u32 = clib_host_to_net_u32(0x01010200),
1290         }
1291     };
1292
1293     fib_table_entry_path_add(fib_index,
1294                              &pfx_1_1_2_0_s_24,
1295                              FIB_SOURCE_API,
1296                              FIB_ENTRY_FLAG_NONE,
1297                              DPO_PROTO_IP4,
1298                              &nh_10_10_10_1,
1299                              tm->hw[0]->sw_if_index,
1300                              ~0, // invalid fib index
1301                              1,
1302                              NULL,
1303                              FIB_ROUTE_PATH_FLAG_NONE);
1304     fei = fib_table_lookup(fib_index, &pfx_1_1_2_0_s_24);
1305     ai = fib_entry_get_adj(fei);
1306     FIB_TEST((ai_01 == ai), "1.1.2.0/24 resolves via 10.10.10.1");
1307
1308     /*
1309      * +1 entry only
1310      */
1311     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB is empty");
1312     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
1313              fib_path_list_pool_size());
1314     FIB_TEST((ENBR+6 == fib_entry_pool_size()), "entry pool size is %d",
1315              fib_entry_pool_size());
1316
1317     /*
1318      * modify 1.1.2.0/24 to use multipath.
1319      */
1320     fib_table_entry_path_add(fib_index,
1321                              &pfx_1_1_2_0_s_24,
1322                              FIB_SOURCE_API,
1323                              FIB_ENTRY_FLAG_NONE,
1324                              DPO_PROTO_IP4,
1325                              &nh_10_10_10_2,
1326                              tm->hw[0]->sw_if_index,
1327                              ~0, // invalid fib index
1328                              1,
1329                              NULL,
1330                              FIB_ROUTE_PATH_FLAG_NONE);
1331     fei = fib_table_lookup(fib_index, &pfx_1_1_2_0_s_24);
1332     dpo = fib_entry_contribute_ip_forwarding(fei);
1333     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1334                                     1, tm->hw[0]->sw_if_index),
1335              "RPF list for 1.1.2.0/24 contains both adjs");
1336
1337     dpo1 = load_balance_get_bucket(dpo->dpoi_index, 0);
1338     FIB_TEST(DPO_ADJACENCY == dpo1->dpoi_type, "type is %d", dpo1->dpoi_type);
1339     FIB_TEST((ai_01 == dpo1->dpoi_index),
1340              "1.1.2.0/24 bucket 0 resolves via 10.10.10.1 (%d=%d)",
1341              ai_01, dpo1->dpoi_index);
1342
1343     dpo1 = load_balance_get_bucket(dpo->dpoi_index, 1);
1344     FIB_TEST(DPO_ADJACENCY == dpo1->dpoi_type, "type is %d", dpo1->dpoi_type);
1345     FIB_TEST((ai_02 == dpo1->dpoi_index),
1346              "1.1.2.0/24 bucket 1 resolves via 10.10.10.2");
1347
1348     /*
1349      * +1 shared-pathlist
1350      */
1351     FIB_TEST((2 == fib_path_list_db_size()),   "path list DB is empty");
1352     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
1353              fib_path_list_pool_size());
1354     FIB_TEST((ENBR+6 == fib_entry_pool_size()), "entry pool size is %d",
1355              fib_entry_pool_size());
1356
1357     /*
1358      * revert the modify
1359      */
1360     fib_table_entry_path_remove(fib_index,
1361                                 &pfx_1_1_2_0_s_24,
1362                                 FIB_SOURCE_API,
1363                                 DPO_PROTO_IP4,
1364                                 &nh_10_10_10_2,
1365                                 tm->hw[0]->sw_if_index,
1366                                 ~0,
1367                                 1,
1368                                 FIB_ROUTE_PATH_FLAG_NONE);
1369     fei = fib_table_lookup(fib_index, &pfx_1_1_2_0_s_24);
1370     dpo = fib_entry_contribute_ip_forwarding(fei);
1371     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1372                                     1, tm->hw[0]->sw_if_index),
1373              "RPF list for 1.1.2.0/24 contains one adj");
1374
1375     ai = fib_entry_get_adj(fei);
1376     FIB_TEST((ai_01 == ai), "1.1.2.0/24 resolves via 10.10.10.1");
1377
1378     /*
1379      * +1 shared-pathlist
1380      */
1381     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB is %d",
1382              fib_path_list_db_size());
1383     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
1384              fib_path_list_pool_size());
1385     FIB_TEST((ENBR+6 == fib_entry_pool_size()), "entry pool size is %d",
1386              fib_entry_pool_size());
1387
1388     /*
1389      * Add 2 recursive routes:
1390      *   100.100.100.100/32 via 1.1.1.1/32  => the via entry is installed.
1391      *   100.100.100.101/32 via 1.1.1.1/32  => the via entry is installed.
1392      */
1393     fib_prefix_t bgp_100_pfx = {
1394         .fp_len = 32,
1395         .fp_proto = FIB_PROTOCOL_IP4,
1396         .fp_addr = {
1397             /* 100.100.100.100/32 */
1398             .ip4.as_u32 = clib_host_to_net_u32(0x64646464),
1399         },
1400     };
1401     /* via 1.1.1.1 */
1402     ip46_address_t nh_1_1_1_1 = {
1403         .ip4.as_u32 = clib_host_to_net_u32(0x01010101),
1404     };
1405
1406     fei = fib_table_entry_path_add(fib_index,
1407                                    &bgp_100_pfx,
1408                                    FIB_SOURCE_API,
1409                                    FIB_ENTRY_FLAG_NONE,
1410                                    DPO_PROTO_IP4,
1411                                    &nh_1_1_1_1,
1412                                    ~0, // no index provided.
1413                                    fib_index, // nexthop in same fib as route
1414                                    1,
1415                                    NULL,
1416                                    FIB_ROUTE_PATH_FLAG_NONE);
1417
1418     FIB_TEST_REC_FORW(&bgp_100_pfx, &pfx_1_1_1_1_s_32, 0);
1419     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1,
1420                                     tm->hw[0]->sw_if_index),
1421              "RPF list for adj-fib contains adj");
1422
1423     /*
1424      * +1 entry and +1 shared-path-list
1425      */
1426     FIB_TEST((2  == fib_path_list_db_size()),   "path list DB population:%d",
1427              fib_path_list_db_size());
1428     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
1429              fib_path_list_pool_size());
1430     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
1431              fib_entry_pool_size());
1432
1433     fib_prefix_t bgp_101_pfx = {
1434         .fp_len = 32,
1435         .fp_proto = FIB_PROTOCOL_IP4,
1436         .fp_addr = {
1437             /* 100.100.100.101/32 */
1438             .ip4.as_u32 = clib_host_to_net_u32(0x64646465),
1439         },
1440     };
1441
1442     fib_table_entry_path_add(fib_index,
1443                              &bgp_101_pfx,
1444                              FIB_SOURCE_API,
1445                              FIB_ENTRY_FLAG_NONE,
1446                              DPO_PROTO_IP4,
1447                              &nh_1_1_1_1,
1448                              ~0, // no index provided.
1449                              fib_index, // nexthop in same fib as route
1450                              1,
1451                              NULL,
1452                              FIB_ROUTE_PATH_FLAG_NONE);
1453
1454     FIB_TEST_REC_FORW(&bgp_101_pfx, &pfx_1_1_1_1_s_32, 0);
1455     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1,
1456                                     tm->hw[0]->sw_if_index),
1457              "RPF list for adj-fib contains adj");
1458
1459     /*
1460      * +1 entry, but the recursive path-list is shared.
1461      */
1462     FIB_TEST((2  == fib_path_list_db_size()),   "path list DB population:%d",
1463              fib_path_list_db_size());
1464     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
1465              fib_path_list_pool_size());
1466     FIB_TEST((ENBR+8 == fib_entry_pool_size()), "entry pool size is %d",
1467              fib_entry_pool_size());
1468
1469     /*
1470      * An special route; one where the user (me) provides the
1471      * adjacency through which the route will resovle by setting the flags
1472      */
1473     fib_prefix_t ex_pfx = {
1474         .fp_len = 32,
1475         .fp_proto = FIB_PROTOCOL_IP4,
1476         .fp_addr = {
1477             /* 4.4.4.4/32 */
1478             .ip4.as_u32 = clib_host_to_net_u32(0x04040404),
1479         },
1480     };
1481
1482     fib_table_entry_special_add(fib_index,
1483                                 &ex_pfx,
1484                                 FIB_SOURCE_SPECIAL,
1485                                 FIB_ENTRY_FLAG_LOCAL);
1486     fei = fib_table_lookup_exact_match(fib_index, &ex_pfx);
1487     dpo = fib_entry_contribute_ip_forwarding(fei);
1488     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
1489     FIB_TEST((DPO_RECEIVE == dpo->dpoi_type),
1490              "local interface adj is local");
1491
1492     fib_table_entry_special_remove(fib_index,
1493                                    &ex_pfx,
1494                                    FIB_SOURCE_SPECIAL);
1495     FIB_TEST(FIB_NODE_INDEX_INVALID ==
1496              fib_table_lookup_exact_match(fib_index, &ex_pfx),
1497              "Exclusive reoute removed");
1498
1499     /*
1500      * An EXCLUSIVE route; one where the user (me) provides the exclusive
1501      * adjacency through which the route will resovle
1502      */
1503     dpo_id_t ex_dpo = DPO_INVALID;
1504
1505     lookup_dpo_add_or_lock_w_fib_index(fib_index,
1506                                        DPO_PROTO_IP4,
1507                                        LOOKUP_UNICAST,
1508                                        LOOKUP_INPUT_DST_ADDR,
1509                                        LOOKUP_TABLE_FROM_CONFIG,
1510                                        &ex_dpo);
1511
1512     fib_table_entry_special_dpo_add(fib_index,
1513                                     &ex_pfx,
1514                                     FIB_SOURCE_SPECIAL,
1515                                     FIB_ENTRY_FLAG_EXCLUSIVE,
1516                                     &ex_dpo);
1517     fei = fib_table_lookup_exact_match(fib_index, &ex_pfx);
1518     dpo = fib_entry_contribute_ip_forwarding(fei);
1519     FIB_TEST(!dpo_cmp(&ex_dpo, load_balance_get_bucket(dpo->dpoi_index, 0)),
1520              "exclusive remote uses lookup DPO");
1521
1522     /*
1523      * update the exclusive to use a different DPO
1524      */
1525     ip_null_dpo_add_and_lock(DPO_PROTO_IP4,
1526                              IP_NULL_ACTION_SEND_ICMP_UNREACH,
1527                              &ex_dpo);
1528     fib_table_entry_special_dpo_update(fib_index,
1529                                        &ex_pfx,
1530                                        FIB_SOURCE_SPECIAL,
1531                                        FIB_ENTRY_FLAG_EXCLUSIVE,
1532                                        &ex_dpo);
1533     dpo = fib_entry_contribute_ip_forwarding(fei);
1534     FIB_TEST(!dpo_cmp(&ex_dpo, load_balance_get_bucket(dpo->dpoi_index, 0)),
1535              "exclusive remote uses now uses NULL DPO");
1536
1537     fib_table_entry_special_remove(fib_index,
1538                                    &ex_pfx,
1539                                    FIB_SOURCE_SPECIAL);
1540     FIB_TEST(FIB_NODE_INDEX_INVALID ==
1541              fib_table_lookup_exact_match(fib_index, &ex_pfx),
1542              "Exclusive reoute removed");
1543     dpo_reset(&ex_dpo);
1544
1545     /*
1546      * Add a recursive route:
1547      *   200.200.200.200/32 via 1.1.1.2/32  => the via entry is NOT installed.
1548      */
1549     fib_prefix_t bgp_200_pfx = {
1550         .fp_len = 32,
1551         .fp_proto = FIB_PROTOCOL_IP4,
1552         .fp_addr = {
1553             /* 200.200.200.200/32 */
1554             .ip4.as_u32 = clib_host_to_net_u32(0xc8c8c8c8),
1555         },
1556     };
1557     /* via 1.1.1.2 */
1558     fib_prefix_t pfx_1_1_1_2_s_32 = {
1559         .fp_len = 32,
1560         .fp_proto = FIB_PROTOCOL_IP4,
1561         .fp_addr = {
1562             .ip4.as_u32 = clib_host_to_net_u32(0x01010102),
1563         },
1564     };
1565
1566     fei = fib_table_entry_path_add(fib_index,
1567                                    &bgp_200_pfx,
1568                                    FIB_SOURCE_API,
1569                                    FIB_ENTRY_FLAG_NONE,
1570                                    DPO_PROTO_IP4,
1571                                    &pfx_1_1_1_2_s_32.fp_addr,
1572                                    ~0, // no index provided.
1573                                    fib_index, // nexthop in same fib as route
1574                                    1,
1575                                    NULL,
1576                                    FIB_ROUTE_PATH_FLAG_NONE);
1577
1578     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
1579              "Recursive via unresolved is drop");
1580
1581     /*
1582      * the adj should be recursive via drop, since the route resolves via
1583      * the default route, which is itself a DROP
1584      */
1585     fei = fib_table_lookup(fib_index, &pfx_1_1_1_2_s_32);
1586     dpo1 = fib_entry_contribute_ip_forwarding(fei);
1587     FIB_TEST(load_balance_is_drop(dpo1), "1.1.1.2/32 is drop");
1588     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 0),
1589              "RPF list for 1.1.1.2/32 contains 0 adjs");
1590
1591     /*
1592      * +2 entry and +1 shared-path-list
1593      */
1594     FIB_TEST((3  == fib_path_list_db_size()),   "path list DB population:%d",
1595              fib_path_list_db_size());
1596     FIB_TEST((PNBR+7 == fib_path_list_pool_size()), "path list pool size is %d",
1597              fib_path_list_pool_size());
1598     FIB_TEST((ENBR+10 == fib_entry_pool_size()), "entry pool size is %d",
1599              fib_entry_pool_size());
1600
1601     /*
1602      * Unequal Cost load-balance. 3:1 ratio. fits in a 4 bucket LB
1603      * The paths are sort by NH first. in this case the the path with greater
1604      * weight is first in the set. This ordering is to test the RPF sort|uniq logic
1605      */
1606     fib_prefix_t pfx_1_2_3_4_s_32 = {
1607         .fp_len = 32,
1608         .fp_proto = FIB_PROTOCOL_IP4,
1609         .fp_addr = {
1610             .ip4.as_u32 = clib_host_to_net_u32(0x01020304),
1611         },
1612     };
1613     fib_table_entry_path_add(fib_index,
1614                              &pfx_1_2_3_4_s_32,
1615                              FIB_SOURCE_API,
1616                              FIB_ENTRY_FLAG_NONE,
1617                              DPO_PROTO_IP4,
1618                              &nh_10_10_10_1,
1619                              tm->hw[0]->sw_if_index,
1620                              ~0,
1621                              1,
1622                              NULL,
1623                              FIB_ROUTE_PATH_FLAG_NONE);
1624     fei = fib_table_entry_path_add(fib_index,
1625                                    &pfx_1_2_3_4_s_32,
1626                                    FIB_SOURCE_API,
1627                                    FIB_ENTRY_FLAG_NONE,
1628                                    DPO_PROTO_IP4,
1629                                    &nh_12_12_12_12,
1630                                    tm->hw[1]->sw_if_index,
1631                                    ~0,
1632                                    3,
1633                                    NULL,
1634                                    FIB_ROUTE_PATH_FLAG_NONE);
1635
1636     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "1.2.3.4/32 presnet");
1637     dpo = fib_entry_contribute_ip_forwarding(fei);
1638     lb = load_balance_get(dpo->dpoi_index);
1639     FIB_TEST((lb->lb_n_buckets == 4),
1640              "1.2.3.4/32 LB has %d bucket",
1641              lb->lb_n_buckets);
1642
1643     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_4_s_32, 0, ai_12_12_12_12);
1644     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_4_s_32, 1, ai_12_12_12_12);
1645     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_4_s_32, 2, ai_12_12_12_12);
1646     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_4_s_32, 3, ai_01);
1647
1648     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 2,
1649                                     tm->hw[0]->sw_if_index,
1650                                     tm->hw[1]->sw_if_index),
1651              "RPF list for 1.2.3.4/32 contains both adjs");
1652
1653
1654     /*
1655      * Unequal Cost load-balance. 4:1 ratio.
1656      *  fits in a 16 bucket LB with ratio 13:3
1657      */
1658     fib_prefix_t pfx_1_2_3_5_s_32 = {
1659         .fp_len = 32,
1660         .fp_proto = FIB_PROTOCOL_IP4,
1661         .fp_addr = {
1662             .ip4.as_u32 = clib_host_to_net_u32(0x01020305),
1663         },
1664     };
1665     fib_table_entry_path_add(fib_index,
1666                              &pfx_1_2_3_5_s_32,
1667                              FIB_SOURCE_API,
1668                              FIB_ENTRY_FLAG_NONE,
1669                              DPO_PROTO_IP4,
1670                              &nh_12_12_12_12,
1671                              tm->hw[1]->sw_if_index,
1672                              ~0,
1673                              1,
1674                              NULL,
1675                              FIB_ROUTE_PATH_FLAG_NONE);
1676     fei = fib_table_entry_path_add(fib_index,
1677                                    &pfx_1_2_3_5_s_32,
1678                                    FIB_SOURCE_API,
1679                                    FIB_ENTRY_FLAG_NONE,
1680                                    DPO_PROTO_IP4,
1681                                    &nh_10_10_10_1,
1682                                    tm->hw[0]->sw_if_index,
1683                                    ~0,
1684                                    4,
1685                                    NULL,
1686                                    FIB_ROUTE_PATH_FLAG_NONE);
1687
1688     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "1.2.3.5/32 presnet");
1689     dpo = fib_entry_contribute_ip_forwarding(fei);
1690     lb = load_balance_get(dpo->dpoi_index);
1691     FIB_TEST((lb->lb_n_buckets == 16),
1692              "1.2.3.5/32 LB has %d bucket",
1693              lb->lb_n_buckets);
1694
1695     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 0, ai_01);
1696     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 1, ai_01);
1697     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 2, ai_01);
1698     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 3, ai_01);
1699     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 4, ai_01);
1700     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 5, ai_01);
1701     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 6, ai_01);
1702     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 7, ai_01);
1703     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 8, ai_01);
1704     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 9, ai_01);
1705     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 10, ai_01);
1706     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 11, ai_01);
1707     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 12, ai_01);
1708     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 13, ai_12_12_12_12);
1709     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 14, ai_12_12_12_12);
1710     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 15, ai_12_12_12_12);
1711
1712     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 2,
1713                                     tm->hw[0]->sw_if_index,
1714                                     tm->hw[1]->sw_if_index),
1715              "RPF list for 1.2.3.4/32 contains both adjs");
1716
1717     /*
1718      * Test UCMP with a large weight skew - this produces load-balance objects with large
1719      * numbers of buckets to accommodate the skew. By updating said load-balances we are
1720      * laso testing the LB in placce modify code when number of buckets is large.
1721      */
1722     fib_prefix_t pfx_6_6_6_6_s_32 = {
1723         .fp_len = 32,
1724         .fp_proto = FIB_PROTOCOL_IP4,
1725         .fp_addr = {
1726             /* 1.1.1.1/32 */
1727             .ip4.as_u32 = clib_host_to_net_u32(0x06060606),
1728         },
1729     };
1730     fib_test_lb_bucket_t ip_o_10_10_10_1 = {
1731         .type = FT_LB_ADJ,
1732         .adj = {
1733             .adj = ai_01,
1734         },
1735     };
1736     fib_test_lb_bucket_t ip_o_10_10_10_2 = {
1737         .type = FT_LB_ADJ,
1738         .adj = {
1739             .adj = ai_02,
1740         },
1741     };
1742     fib_test_lb_bucket_t ip_6_6_6_6_o_12_12_12_12 = {
1743         .type = FT_LB_ADJ,
1744         .adj = {
1745             .adj = ai_12_12_12_12,
1746         },
1747     };
1748     fib_table_entry_update_one_path(fib_index,
1749                                     &pfx_6_6_6_6_s_32,
1750                                     FIB_SOURCE_API,
1751                                     FIB_ENTRY_FLAG_NONE,
1752                                     DPO_PROTO_IP4,
1753                                     &nh_10_10_10_1,
1754                                     tm->hw[0]->sw_if_index,
1755                                     ~0, // invalid fib index
1756                                     0,  // zero weigth
1757                                     NULL,
1758                                     FIB_ROUTE_PATH_FLAG_NONE);
1759
1760     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
1761     FIB_TEST(!fib_test_validate_entry(fei,
1762                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1763                                       1,
1764                                       &ip_o_10_10_10_1),
1765              "6.6.6.6/32 via 10.10.10.1");
1766
1767     fib_table_entry_path_add(fib_index,
1768                              &pfx_6_6_6_6_s_32,
1769                              FIB_SOURCE_API,
1770                              FIB_ENTRY_FLAG_NONE,
1771                              DPO_PROTO_IP4,
1772                              &nh_10_10_10_2,
1773                              tm->hw[0]->sw_if_index,
1774                              ~0, // invalid fib index
1775                              100,
1776                              NULL,
1777                              FIB_ROUTE_PATH_FLAG_NONE);
1778
1779     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
1780     FIB_TEST(!fib_test_validate_entry(fei,
1781                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1782                                       64,
1783                                       &ip_o_10_10_10_2,
1784                                       &ip_o_10_10_10_2,
1785                                       &ip_o_10_10_10_2,
1786                                       &ip_o_10_10_10_2,
1787                                       &ip_o_10_10_10_2,
1788                                       &ip_o_10_10_10_2,
1789                                       &ip_o_10_10_10_2,
1790                                       &ip_o_10_10_10_2,
1791                                       &ip_o_10_10_10_2,
1792                                       &ip_o_10_10_10_2,
1793                                       &ip_o_10_10_10_2,
1794                                       &ip_o_10_10_10_2,
1795                                       &ip_o_10_10_10_2,
1796                                       &ip_o_10_10_10_2,
1797                                       &ip_o_10_10_10_2,
1798                                       &ip_o_10_10_10_2,
1799                                       &ip_o_10_10_10_2,
1800                                       &ip_o_10_10_10_2,
1801                                       &ip_o_10_10_10_2,
1802                                       &ip_o_10_10_10_2,
1803                                       &ip_o_10_10_10_2,
1804                                       &ip_o_10_10_10_2,
1805                                       &ip_o_10_10_10_2,
1806                                       &ip_o_10_10_10_2,
1807                                       &ip_o_10_10_10_2,
1808                                       &ip_o_10_10_10_2,
1809                                       &ip_o_10_10_10_2,
1810                                       &ip_o_10_10_10_2,
1811                                       &ip_o_10_10_10_2,
1812                                       &ip_o_10_10_10_2,
1813                                       &ip_o_10_10_10_2,
1814                                       &ip_o_10_10_10_2,
1815                                       &ip_o_10_10_10_2,
1816                                       &ip_o_10_10_10_2,
1817                                       &ip_o_10_10_10_2,
1818                                       &ip_o_10_10_10_2,
1819                                       &ip_o_10_10_10_2,
1820                                       &ip_o_10_10_10_2,
1821                                       &ip_o_10_10_10_2,
1822                                       &ip_o_10_10_10_2,
1823                                       &ip_o_10_10_10_2,
1824                                       &ip_o_10_10_10_2,
1825                                       &ip_o_10_10_10_2,
1826                                       &ip_o_10_10_10_2,
1827                                       &ip_o_10_10_10_2,
1828                                       &ip_o_10_10_10_2,
1829                                       &ip_o_10_10_10_2,
1830                                       &ip_o_10_10_10_2,
1831                                       &ip_o_10_10_10_2,
1832                                       &ip_o_10_10_10_2,
1833                                       &ip_o_10_10_10_2,
1834                                       &ip_o_10_10_10_2,
1835                                       &ip_o_10_10_10_2,
1836                                       &ip_o_10_10_10_2,
1837                                       &ip_o_10_10_10_2,
1838                                       &ip_o_10_10_10_2,
1839                                       &ip_o_10_10_10_2,
1840                                       &ip_o_10_10_10_2,
1841                                       &ip_o_10_10_10_2,
1842                                       &ip_o_10_10_10_2,
1843                                       &ip_o_10_10_10_2,
1844                                       &ip_o_10_10_10_2,
1845                                       &ip_o_10_10_10_2,
1846                                       &ip_o_10_10_10_1),
1847              "6.6.6.6/32 via 10.10.10.1 and 10.10.10.2 in 63:1 ratio");
1848
1849     fib_table_entry_path_add(fib_index,
1850                              &pfx_6_6_6_6_s_32,
1851                              FIB_SOURCE_API,
1852                              FIB_ENTRY_FLAG_NONE,
1853                              DPO_PROTO_IP4,
1854                              &nh_12_12_12_12,
1855                              tm->hw[1]->sw_if_index,
1856                              ~0, // invalid fib index
1857                              100,
1858                              NULL,
1859                              FIB_ROUTE_PATH_FLAG_NONE);
1860
1861     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
1862     FIB_TEST(!fib_test_validate_entry(fei,
1863                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1864                                       128,
1865                                       &ip_o_10_10_10_1,
1866                                       &ip_o_10_10_10_2,
1867                                       &ip_o_10_10_10_2,
1868                                       &ip_o_10_10_10_2,
1869                                       &ip_o_10_10_10_2,
1870                                       &ip_o_10_10_10_2,
1871                                       &ip_o_10_10_10_2,
1872                                       &ip_o_10_10_10_2,
1873                                       &ip_o_10_10_10_2,
1874                                       &ip_o_10_10_10_2,
1875                                       &ip_o_10_10_10_2,
1876                                       &ip_o_10_10_10_2,
1877                                       &ip_o_10_10_10_2,
1878                                       &ip_o_10_10_10_2,
1879                                       &ip_o_10_10_10_2,
1880                                       &ip_o_10_10_10_2,
1881                                       &ip_o_10_10_10_2,
1882                                       &ip_o_10_10_10_2,
1883                                       &ip_o_10_10_10_2,
1884                                       &ip_o_10_10_10_2,
1885                                       &ip_o_10_10_10_2,
1886                                       &ip_o_10_10_10_2,
1887                                       &ip_o_10_10_10_2,
1888                                       &ip_o_10_10_10_2,
1889                                       &ip_o_10_10_10_2,
1890                                       &ip_o_10_10_10_2,
1891                                       &ip_o_10_10_10_2,
1892                                       &ip_o_10_10_10_2,
1893                                       &ip_o_10_10_10_2,
1894                                       &ip_o_10_10_10_2,
1895                                       &ip_o_10_10_10_2,
1896                                       &ip_o_10_10_10_2,
1897                                       &ip_o_10_10_10_2,
1898                                       &ip_o_10_10_10_2,
1899                                       &ip_o_10_10_10_2,
1900                                       &ip_o_10_10_10_2,
1901                                       &ip_o_10_10_10_2,
1902                                       &ip_o_10_10_10_2,
1903                                       &ip_o_10_10_10_2,
1904                                       &ip_o_10_10_10_2,
1905                                       &ip_o_10_10_10_2,
1906                                       &ip_o_10_10_10_2,
1907                                       &ip_o_10_10_10_2,
1908                                       &ip_o_10_10_10_2,
1909                                       &ip_o_10_10_10_2,
1910                                       &ip_o_10_10_10_2,
1911                                       &ip_o_10_10_10_2,
1912                                       &ip_o_10_10_10_2,
1913                                       &ip_o_10_10_10_2,
1914                                       &ip_o_10_10_10_2,
1915                                       &ip_o_10_10_10_2,
1916                                       &ip_o_10_10_10_2,
1917                                       &ip_o_10_10_10_2,
1918                                       &ip_o_10_10_10_2,
1919                                       &ip_o_10_10_10_2,
1920                                       &ip_o_10_10_10_2,
1921                                       &ip_o_10_10_10_2,
1922                                       &ip_o_10_10_10_2,
1923                                       &ip_o_10_10_10_2,
1924                                       &ip_o_10_10_10_2,
1925                                       &ip_o_10_10_10_2,
1926                                       &ip_o_10_10_10_2,
1927                                       &ip_o_10_10_10_2,
1928                                       &ip_o_10_10_10_2,
1929                                       &ip_o_10_10_10_2,
1930                                       &ip_6_6_6_6_o_12_12_12_12,
1931                                       &ip_6_6_6_6_o_12_12_12_12,
1932                                       &ip_6_6_6_6_o_12_12_12_12,
1933                                       &ip_6_6_6_6_o_12_12_12_12,
1934                                       &ip_6_6_6_6_o_12_12_12_12,
1935                                       &ip_6_6_6_6_o_12_12_12_12,
1936                                       &ip_6_6_6_6_o_12_12_12_12,
1937                                       &ip_6_6_6_6_o_12_12_12_12,
1938                                       &ip_6_6_6_6_o_12_12_12_12,
1939                                       &ip_6_6_6_6_o_12_12_12_12,
1940                                       &ip_6_6_6_6_o_12_12_12_12,
1941                                       &ip_6_6_6_6_o_12_12_12_12,
1942                                       &ip_6_6_6_6_o_12_12_12_12,
1943                                       &ip_6_6_6_6_o_12_12_12_12,
1944                                       &ip_6_6_6_6_o_12_12_12_12,
1945                                       &ip_6_6_6_6_o_12_12_12_12,
1946                                       &ip_6_6_6_6_o_12_12_12_12,
1947                                       &ip_6_6_6_6_o_12_12_12_12,
1948                                       &ip_6_6_6_6_o_12_12_12_12,
1949                                       &ip_6_6_6_6_o_12_12_12_12,
1950                                       &ip_6_6_6_6_o_12_12_12_12,
1951                                       &ip_6_6_6_6_o_12_12_12_12,
1952                                       &ip_6_6_6_6_o_12_12_12_12,
1953                                       &ip_6_6_6_6_o_12_12_12_12,
1954                                       &ip_6_6_6_6_o_12_12_12_12,
1955                                       &ip_6_6_6_6_o_12_12_12_12,
1956                                       &ip_6_6_6_6_o_12_12_12_12,
1957                                       &ip_6_6_6_6_o_12_12_12_12,
1958                                       &ip_6_6_6_6_o_12_12_12_12,
1959                                       &ip_6_6_6_6_o_12_12_12_12,
1960                                       &ip_6_6_6_6_o_12_12_12_12,
1961                                       &ip_6_6_6_6_o_12_12_12_12,
1962                                       &ip_6_6_6_6_o_12_12_12_12,
1963                                       &ip_6_6_6_6_o_12_12_12_12,
1964                                       &ip_6_6_6_6_o_12_12_12_12,
1965                                       &ip_6_6_6_6_o_12_12_12_12,
1966                                       &ip_6_6_6_6_o_12_12_12_12,
1967                                       &ip_6_6_6_6_o_12_12_12_12,
1968                                       &ip_6_6_6_6_o_12_12_12_12,
1969                                       &ip_6_6_6_6_o_12_12_12_12,
1970                                       &ip_6_6_6_6_o_12_12_12_12,
1971                                       &ip_6_6_6_6_o_12_12_12_12,
1972                                       &ip_6_6_6_6_o_12_12_12_12,
1973                                       &ip_6_6_6_6_o_12_12_12_12,
1974                                       &ip_6_6_6_6_o_12_12_12_12,
1975                                       &ip_6_6_6_6_o_12_12_12_12,
1976                                       &ip_6_6_6_6_o_12_12_12_12,
1977                                       &ip_6_6_6_6_o_12_12_12_12,
1978                                       &ip_6_6_6_6_o_12_12_12_12,
1979                                       &ip_6_6_6_6_o_12_12_12_12,
1980                                       &ip_6_6_6_6_o_12_12_12_12,
1981                                       &ip_6_6_6_6_o_12_12_12_12,
1982                                       &ip_6_6_6_6_o_12_12_12_12,
1983                                       &ip_6_6_6_6_o_12_12_12_12,
1984                                       &ip_6_6_6_6_o_12_12_12_12,
1985                                       &ip_6_6_6_6_o_12_12_12_12,
1986                                       &ip_6_6_6_6_o_12_12_12_12,
1987                                       &ip_6_6_6_6_o_12_12_12_12,
1988                                       &ip_6_6_6_6_o_12_12_12_12,
1989                                       &ip_6_6_6_6_o_12_12_12_12,
1990                                       &ip_6_6_6_6_o_12_12_12_12,
1991                                       &ip_6_6_6_6_o_12_12_12_12,
1992                                       &ip_6_6_6_6_o_12_12_12_12),
1993              "6.6.6.6/32 via 10.10.10.1 and 10.10.10.2 in 63:1 ratio");
1994
1995     fib_table_entry_path_remove(fib_index,
1996                                 &pfx_6_6_6_6_s_32,
1997                                 FIB_SOURCE_API,
1998                                 DPO_PROTO_IP4,
1999                                 &nh_12_12_12_12,
2000                                 tm->hw[1]->sw_if_index,
2001                                 ~0, // invalid fib index
2002                                 100,
2003                                 FIB_ROUTE_PATH_FLAG_NONE);
2004
2005     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
2006     FIB_TEST(!fib_test_validate_entry(fei,
2007                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
2008                                       64,
2009                                       &ip_o_10_10_10_2,
2010                                       &ip_o_10_10_10_2,
2011                                       &ip_o_10_10_10_2,
2012                                       &ip_o_10_10_10_2,
2013                                       &ip_o_10_10_10_2,
2014                                       &ip_o_10_10_10_2,
2015                                       &ip_o_10_10_10_2,
2016                                       &ip_o_10_10_10_2,
2017                                       &ip_o_10_10_10_2,
2018                                       &ip_o_10_10_10_2,
2019                                       &ip_o_10_10_10_2,
2020                                       &ip_o_10_10_10_2,
2021                                       &ip_o_10_10_10_2,
2022                                       &ip_o_10_10_10_2,
2023                                       &ip_o_10_10_10_2,
2024                                       &ip_o_10_10_10_2,
2025                                       &ip_o_10_10_10_2,
2026                                       &ip_o_10_10_10_2,
2027                                       &ip_o_10_10_10_2,
2028                                       &ip_o_10_10_10_2,
2029                                       &ip_o_10_10_10_2,
2030                                       &ip_o_10_10_10_2,
2031                                       &ip_o_10_10_10_2,
2032                                       &ip_o_10_10_10_2,
2033                                       &ip_o_10_10_10_2,
2034                                       &ip_o_10_10_10_2,
2035                                       &ip_o_10_10_10_2,
2036                                       &ip_o_10_10_10_2,
2037                                       &ip_o_10_10_10_2,
2038                                       &ip_o_10_10_10_2,
2039                                       &ip_o_10_10_10_2,
2040                                       &ip_o_10_10_10_2,
2041                                       &ip_o_10_10_10_2,
2042                                       &ip_o_10_10_10_2,
2043                                       &ip_o_10_10_10_2,
2044                                       &ip_o_10_10_10_2,
2045                                       &ip_o_10_10_10_2,
2046                                       &ip_o_10_10_10_2,
2047                                       &ip_o_10_10_10_2,
2048                                       &ip_o_10_10_10_2,
2049                                       &ip_o_10_10_10_2,
2050                                       &ip_o_10_10_10_2,
2051                                       &ip_o_10_10_10_2,
2052                                       &ip_o_10_10_10_2,
2053                                       &ip_o_10_10_10_2,
2054                                       &ip_o_10_10_10_2,
2055                                       &ip_o_10_10_10_2,
2056                                       &ip_o_10_10_10_2,
2057                                       &ip_o_10_10_10_2,
2058                                       &ip_o_10_10_10_2,
2059                                       &ip_o_10_10_10_2,
2060                                       &ip_o_10_10_10_2,
2061                                       &ip_o_10_10_10_2,
2062                                       &ip_o_10_10_10_2,
2063                                       &ip_o_10_10_10_2,
2064                                       &ip_o_10_10_10_2,
2065                                       &ip_o_10_10_10_2,
2066                                       &ip_o_10_10_10_2,
2067                                       &ip_o_10_10_10_2,
2068                                       &ip_o_10_10_10_2,
2069                                       &ip_o_10_10_10_2,
2070                                       &ip_o_10_10_10_2,
2071                                       &ip_o_10_10_10_2,
2072                                       &ip_o_10_10_10_1),
2073              "6.6.6.6/32 via 10.10.10.1 and 10.10.10.2 in 63:1 ratio");
2074
2075     fib_table_entry_path_remove(fib_index,
2076                                 &pfx_6_6_6_6_s_32,
2077                                 FIB_SOURCE_API,
2078                                 DPO_PROTO_IP4,
2079                                 &nh_10_10_10_2,
2080                                 tm->hw[0]->sw_if_index,
2081                                 ~0, // invalid fib index
2082                                 100,
2083                                 FIB_ROUTE_PATH_FLAG_NONE);
2084
2085     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
2086     FIB_TEST(!fib_test_validate_entry(fei,
2087                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
2088                                       1,
2089                                       &ip_o_10_10_10_1),
2090              "6.6.6.6/32 via 10.10.10.1");
2091
2092     fib_table_entry_delete(fib_index, &pfx_6_6_6_6_s_32, FIB_SOURCE_API);
2093
2094     /*
2095      * A recursive via the two unequal cost entries
2096      */
2097     fib_prefix_t bgp_44_s_32 = {
2098         .fp_len = 32,
2099         .fp_proto = FIB_PROTOCOL_IP4,
2100         .fp_addr = {
2101             /* 200.200.200.201/32 */
2102             .ip4.as_u32 = clib_host_to_net_u32(0x44444444),
2103         },
2104     };
2105     fei = fib_table_entry_path_add(fib_index,
2106                                    &bgp_44_s_32,
2107                                    FIB_SOURCE_API,
2108                                    FIB_ENTRY_FLAG_NONE,
2109                                    DPO_PROTO_IP4,
2110                                    &pfx_1_2_3_4_s_32.fp_addr,
2111                                    ~0,
2112                                    fib_index,
2113                                    1,
2114                                    NULL,
2115                                    FIB_ROUTE_PATH_FLAG_NONE);
2116     fei = fib_table_entry_path_add(fib_index,
2117                                    &bgp_44_s_32,
2118                                    FIB_SOURCE_API,
2119                                    FIB_ENTRY_FLAG_NONE,
2120                                    DPO_PROTO_IP4,
2121                                    &pfx_1_2_3_5_s_32.fp_addr,
2122                                    ~0,
2123                                    fib_index,
2124                                    1,
2125                                    NULL,
2126                                    FIB_ROUTE_PATH_FLAG_NONE);
2127
2128     FIB_TEST_REC_FORW(&bgp_44_s_32, &pfx_1_2_3_4_s_32, 0);
2129     FIB_TEST_REC_FORW(&bgp_44_s_32, &pfx_1_2_3_5_s_32, 1);
2130     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 2,
2131                                     tm->hw[0]->sw_if_index,
2132                                     tm->hw[1]->sw_if_index),
2133              "RPF list for 1.2.3.4/32 contains both adjs");
2134
2135     /*
2136      * test the uRPF check functions
2137      */
2138     dpo_id_t dpo_44 = DPO_INVALID;
2139     index_t urpfi;
2140
2141     fib_entry_contribute_forwarding(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, &dpo_44);
2142     urpfi = load_balance_get_urpf(dpo_44.dpoi_index);
2143
2144     FIB_TEST(fib_urpf_check(urpfi, tm->hw[0]->sw_if_index),
2145              "uRPF check for 68.68.68.68/32 on %d OK",
2146              tm->hw[0]->sw_if_index);
2147     FIB_TEST(fib_urpf_check(urpfi, tm->hw[1]->sw_if_index),
2148              "uRPF check for 68.68.68.68/32 on %d OK",
2149              tm->hw[1]->sw_if_index);
2150     FIB_TEST(!fib_urpf_check(urpfi, 99),
2151              "uRPF check for 68.68.68.68/32 on 99 not-OK",
2152              99);
2153     dpo_reset(&dpo_44);
2154
2155     fib_table_entry_delete(fib_index,
2156                            &bgp_44_s_32,
2157                            FIB_SOURCE_API);
2158     fib_table_entry_delete(fib_index,
2159                            &pfx_1_2_3_5_s_32,
2160                            FIB_SOURCE_API);
2161     fib_table_entry_delete(fib_index,
2162                            &pfx_1_2_3_4_s_32,
2163                            FIB_SOURCE_API);
2164
2165     /*
2166      * Add a recursive route:
2167      *   200.200.200.201/32 via 1.1.1.200/32  => the via entry is NOT installed.
2168      */
2169     fib_prefix_t bgp_201_pfx = {
2170         .fp_len = 32,
2171         .fp_proto = FIB_PROTOCOL_IP4,
2172         .fp_addr = {
2173             /* 200.200.200.201/32 */
2174             .ip4.as_u32 = clib_host_to_net_u32(0xc8c8c8c9),
2175         },
2176     };
2177     /* via 1.1.1.200 */
2178     fib_prefix_t pfx_1_1_1_200_s_32 = {
2179         .fp_len = 32,
2180         .fp_proto = FIB_PROTOCOL_IP4,
2181         .fp_addr = {
2182             .ip4.as_u32 = clib_host_to_net_u32(0x010101c8),
2183         },
2184     };
2185
2186     fei = fib_table_entry_path_add(fib_index,
2187                                    &bgp_201_pfx,
2188                                    FIB_SOURCE_API,
2189                                    FIB_ENTRY_FLAG_NONE,
2190                                    DPO_PROTO_IP4,
2191                                    &pfx_1_1_1_200_s_32.fp_addr,
2192                                    ~0, // no index provided.
2193                                    fib_index, // nexthop in same fib as route
2194                                    1,
2195                                    NULL,
2196                                    FIB_ROUTE_PATH_FLAG_NONE);
2197
2198     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2199              "Recursive via unresolved is drop");
2200
2201     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_200_s_32);
2202     FIB_TEST((FIB_ENTRY_FLAG_NONE == fib_entry_get_flags(fei)),
2203              "Flags set on RR via non-attached");
2204     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 0),
2205              "RPF list for BGP route empty");
2206
2207     /*
2208      * +2 entry (BGP & RR) and +1 shared-path-list
2209      */
2210     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2211              fib_path_list_db_size());
2212     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2213              fib_path_list_pool_size());
2214     FIB_TEST((ENBR+12 == fib_entry_pool_size()), "entry pool size is %d",
2215              fib_entry_pool_size());
2216
2217     /*
2218      * insert a route that covers the missing 1.1.1.2/32. we epxect
2219      * 200.200.200.200/32 and 200.200.200.201/32 to resolve through it.
2220      */
2221     fib_prefix_t pfx_1_1_1_0_s_24 = {
2222         .fp_len = 24,
2223         .fp_proto = FIB_PROTOCOL_IP4,
2224         .fp_addr = {
2225             /* 1.1.1.0/24 */
2226             .ip4.as_u32 = clib_host_to_net_u32(0x01010100),
2227         },
2228     };
2229
2230     fib_table_entry_path_add(fib_index,
2231                              &pfx_1_1_1_0_s_24,
2232                              FIB_SOURCE_API,
2233                              FIB_ENTRY_FLAG_NONE,
2234                              DPO_PROTO_IP4,
2235                              &nh_10_10_10_1,
2236                              tm->hw[0]->sw_if_index,
2237                              ~0, // invalid fib index
2238                              1,
2239                              NULL,
2240                              FIB_ROUTE_PATH_FLAG_NONE);
2241     fei = fib_table_lookup(fib_index, &pfx_1_1_1_0_s_24);
2242     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2243     ai = fib_entry_get_adj(fei);
2244     FIB_TEST((ai_01 == ai), "1.1.1.0/24 resolves via 10.10.10.1");
2245     fei = fib_table_lookup(fib_index, &pfx_1_1_1_2_s_32);
2246     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2247     ai = fib_entry_get_adj(fei);
2248     FIB_TEST((ai_01 == ai), "1.1.1.2/32 resolves via 10.10.10.1");
2249     fei = fib_table_lookup(fib_index, &pfx_1_1_1_200_s_32);
2250     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2251     ai = fib_entry_get_adj(fei);
2252     FIB_TEST((ai_01 == ai), "1.1.1.200/24 resolves via 10.10.10.1");
2253
2254     /*
2255      * +1 entry. 1.1.1.1/32 already uses 10.10.10.1 so no new pah-list
2256      */
2257     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2258              fib_path_list_db_size());
2259     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2260              fib_path_list_pool_size());
2261     FIB_TEST((ENBR+13 == fib_entry_pool_size()), "entry pool size is %d",
2262              fib_entry_pool_size());
2263
2264     /*
2265      * the recursive adj for 200.200.200.200 should be updated.
2266      */
2267     FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_200_s_32, 0);
2268     FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
2269     fei = fib_table_lookup(fib_index, &bgp_200_pfx);
2270     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1,
2271                                     tm->hw[0]->sw_if_index),
2272              "RPF list for BGP route has itf index 0");
2273
2274     /*
2275      * insert a more specific route than 1.1.1.0/24 that also covers the
2276      * missing 1.1.1.2/32, but not 1.1.1.200/32. we expect
2277      * 200.200.200.200 to resolve through it.
2278      */
2279     fib_prefix_t pfx_1_1_1_0_s_28 = {
2280         .fp_len = 28,
2281         .fp_proto = FIB_PROTOCOL_IP4,
2282         .fp_addr = {
2283             /* 1.1.1.0/24 */
2284             .ip4.as_u32 = clib_host_to_net_u32(0x01010100),
2285         },
2286     };
2287
2288     fib_table_entry_path_add(fib_index,
2289                              &pfx_1_1_1_0_s_28,
2290                              FIB_SOURCE_API,
2291                              FIB_ENTRY_FLAG_NONE,
2292                              DPO_PROTO_IP4,
2293                              &nh_10_10_10_2,
2294                              tm->hw[0]->sw_if_index,
2295                              ~0, // invalid fib index
2296                              1,
2297                              NULL,
2298                              FIB_ROUTE_PATH_FLAG_NONE);
2299     fei = fib_table_lookup(fib_index, &pfx_1_1_1_0_s_28);
2300     dpo2 = fib_entry_contribute_ip_forwarding(fei);
2301     ai = fib_entry_get_adj(fei);
2302     FIB_TEST((ai_02 == ai), "1.1.1.0/24 resolves via 10.10.10.2");
2303
2304     /*
2305      * +1 entry. +1 shared path-list
2306      */
2307     FIB_TEST((5  == fib_path_list_db_size()),   "path list DB population:%d",
2308              fib_path_list_db_size());
2309     FIB_TEST((PNBR+9 == fib_path_list_pool_size()), "path list pool size is %d",
2310              fib_path_list_pool_size());
2311     FIB_TEST((ENBR+14 == fib_entry_pool_size()), "entry pool size is %d",
2312              fib_entry_pool_size());
2313
2314     /*
2315      * the recursive adj for 200.200.200.200 should be updated.
2316      * 200.200.200.201 remains unchanged.
2317      */
2318     FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_200_s_32, 0);
2319     FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
2320
2321     /*
2322      * remove this /28. 200.200.200.200/32 should revert back to via 1.1.1.0/24
2323      */
2324     fib_table_entry_path_remove(fib_index,
2325                                 &pfx_1_1_1_0_s_28,
2326                                 FIB_SOURCE_API,
2327                                 DPO_PROTO_IP4,
2328                                 &nh_10_10_10_2,
2329                                 tm->hw[0]->sw_if_index,
2330                                 ~0,
2331                                 1,
2332                                 FIB_ROUTE_PATH_FLAG_NONE);
2333     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_0_s_28) ==
2334               FIB_NODE_INDEX_INVALID),
2335              "1.1.1.0/28 removed");
2336     FIB_TEST((fib_table_lookup(fib_index, &pfx_1_1_1_0_s_28) ==
2337               fib_table_lookup(fib_index, &pfx_1_1_1_0_s_24)),
2338              "1.1.1.0/28 lookup via /24");
2339     FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_200_s_32, 0);
2340     FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
2341
2342     /*
2343      * -1 entry. -1 shared path-list
2344      */
2345     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2346              fib_path_list_db_size());
2347     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2348              fib_path_list_pool_size());
2349     FIB_TEST((ENBR+13 == fib_entry_pool_size()), "entry pool size is %d",
2350              fib_entry_pool_size());
2351
2352     /*
2353      * remove 1.1.1.0/24. 200.200.200.200/32 should revert back to via 0.0.0.0/0
2354      */
2355     fib_table_entry_path_remove(fib_index,
2356                                 &pfx_1_1_1_0_s_24,
2357                                 FIB_SOURCE_API,
2358                                 DPO_PROTO_IP4,
2359                                 &nh_10_10_10_1,
2360                                 tm->hw[0]->sw_if_index,
2361                                 ~0,
2362                                 1,
2363                                 FIB_ROUTE_PATH_FLAG_NONE);
2364     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_0_s_24) ==
2365               FIB_NODE_INDEX_INVALID),
2366              "1.1.1.0/24 removed");
2367
2368     fei = fib_table_lookup(fib_index, &pfx_1_1_1_2_s_32);
2369     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2370              "1.1.1.2/32 route is DROP");
2371     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_200_s_32);
2372     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2373              "1.1.1.200/32 route is DROP");
2374
2375     fei = fib_table_lookup_exact_match(fib_index, &bgp_201_pfx);
2376     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2377              "201 is drop");
2378     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
2379     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2380              "200 is drop");
2381
2382     /*
2383      * -1 entry
2384      */
2385     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2386              fib_path_list_db_size());
2387     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2388              fib_path_list_pool_size());
2389     FIB_TEST((ENBR+12 == fib_entry_pool_size()), "entry pool size is %d",
2390              fib_entry_pool_size());
2391
2392     /*
2393      * insert the missing 1.1.1.2/32
2394      */
2395     fei = fib_table_entry_path_add(fib_index,
2396                                    &pfx_1_1_1_2_s_32,
2397                                    FIB_SOURCE_API,
2398                                    FIB_ENTRY_FLAG_NONE,
2399                                    DPO_PROTO_IP4,
2400                                    &nh_10_10_10_1,
2401                                    tm->hw[0]->sw_if_index,
2402                                    ~0, // invalid fib index
2403                                    1,
2404                                    NULL,
2405                                    FIB_ROUTE_PATH_FLAG_NONE);
2406     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2407     ai = fib_entry_get_adj(fei);
2408     FIB_TEST((ai = ai_01), "1.1.1.2/32 resolves via 10.10.10.1");
2409
2410     fei = fib_table_lookup_exact_match(fib_index, &bgp_201_pfx);
2411     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2412              "201 is drop");
2413     FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
2414
2415     /*
2416      * no change. 1.1.1.2/32 was already there RR sourced.
2417      */
2418     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2419              fib_path_list_db_size());
2420     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2421              fib_path_list_pool_size());
2422     FIB_TEST((ENBR+12 == fib_entry_pool_size()), "entry pool size is %d",
2423              fib_entry_pool_size());
2424
2425     /*
2426      * give 201 a resolved path.
2427      *  it now has the unresolved 1.1.1.200 and the resolved 1.1.1.2,
2428      *  only the latter contributes forwarding.
2429      */
2430     fei = fib_table_entry_path_add(fib_index,
2431                                    &bgp_201_pfx,
2432                                    FIB_SOURCE_API,
2433                                    FIB_ENTRY_FLAG_NONE,
2434                                    DPO_PROTO_IP4,
2435                                    &pfx_1_1_1_2_s_32.fp_addr,
2436                                    ~0,
2437                                    fib_index,
2438                                    1,
2439                                    NULL,
2440                                    FIB_ROUTE_PATH_FLAG_NONE);
2441     FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_2_s_32, 0);
2442     fib_table_entry_path_remove(fib_index,
2443                                 &bgp_201_pfx,
2444                                 FIB_SOURCE_API,
2445                                 DPO_PROTO_IP4,
2446                                 &pfx_1_1_1_2_s_32.fp_addr,
2447                                 ~0,
2448                                 fib_index,
2449                                 1,
2450                                 FIB_ROUTE_PATH_FLAG_NONE);
2451
2452     /*
2453      * remove 200.200.200.201/32 which does not have a valid via FIB
2454      */
2455     fib_table_entry_path_remove(fib_index,
2456                                 &bgp_201_pfx,
2457                                 FIB_SOURCE_API,
2458                                 DPO_PROTO_IP4,
2459                                 &pfx_1_1_1_200_s_32.fp_addr,
2460                                 ~0, // no index provided.
2461                                 fib_index,
2462                                 1,
2463                                 FIB_ROUTE_PATH_FLAG_NONE);
2464
2465     /*
2466      * -2 entries (BGP and RR). -1 shared path-list;
2467      */
2468     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_201_pfx) ==
2469               FIB_NODE_INDEX_INVALID),
2470              "200.200.200.201/32 removed");
2471     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_200_s_32) ==
2472               FIB_NODE_INDEX_INVALID),
2473              "1.1.1.200/32 removed");
2474
2475     FIB_TEST((3  == fib_path_list_db_size()),   "path list DB population:%d",
2476              fib_path_list_db_size());
2477     FIB_TEST((PNBR+7 == fib_path_list_pool_size()), "path list pool size is %d",
2478              fib_path_list_pool_size());
2479     FIB_TEST((ENBR+10 == fib_entry_pool_size()), "entry pool size is %d",
2480              fib_entry_pool_size());
2481
2482     /*
2483      * remove 200.200.200.200/32 which does have a valid via FIB
2484      */
2485     fib_table_entry_path_remove(fib_index,
2486                                 &bgp_200_pfx,
2487                                 FIB_SOURCE_API,
2488                                 DPO_PROTO_IP4,
2489                                 &pfx_1_1_1_2_s_32.fp_addr,
2490                                 ~0, // no index provided.
2491                                 fib_index,
2492                                 1,
2493                                 FIB_ROUTE_PATH_FLAG_NONE);
2494
2495     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_200_pfx) ==
2496               FIB_NODE_INDEX_INVALID),
2497              "200.200.200.200/32 removed");
2498     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_2_s_32) !=
2499               FIB_NODE_INDEX_INVALID),
2500              "1.1.1.2/32 still present");
2501
2502     /*
2503      * -1 entry (BGP, the RR source is also API sourced). -1 shared path-list;
2504      */
2505     FIB_TEST((2  == fib_path_list_db_size()),   "path list DB population:%d",
2506              fib_path_list_db_size());
2507     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
2508              fib_path_list_pool_size());
2509     FIB_TEST((ENBR+9 == fib_entry_pool_size()), "entry pool size is %d",
2510              fib_entry_pool_size());
2511
2512     /*
2513      * A recursive prefix that has a 2 path  load-balance.
2514      * It also shares a next-hop with other BGP prefixes and hence
2515      * test the ref counting of RR sourced prefixes and 2 level LB.
2516      */
2517     const fib_prefix_t bgp_102 = {
2518         .fp_len = 32,
2519         .fp_proto = FIB_PROTOCOL_IP4,
2520         .fp_addr = {
2521             /* 100.100.100.101/32 */
2522             .ip4.as_u32 = clib_host_to_net_u32(0x64646466),
2523         },
2524     };
2525     fib_table_entry_path_add(fib_index,
2526                              &bgp_102,
2527                              FIB_SOURCE_API,
2528                              FIB_ENTRY_FLAG_NONE,
2529                              DPO_PROTO_IP4,
2530                              &pfx_1_1_1_1_s_32.fp_addr,
2531                              ~0, // no index provided.
2532                              fib_index, // same as route
2533                              1,
2534                              NULL,
2535                              FIB_ROUTE_PATH_FLAG_NONE);
2536     fib_table_entry_path_add(fib_index,
2537                              &bgp_102,
2538                              FIB_SOURCE_API,
2539                              FIB_ENTRY_FLAG_NONE,
2540                              DPO_PROTO_IP4,
2541                              &pfx_1_1_1_2_s_32.fp_addr,
2542                              ~0, // no index provided.
2543                              fib_index, // same as route's FIB
2544                              1,
2545                              NULL,
2546                              FIB_ROUTE_PATH_FLAG_NONE);
2547     fei = fib_table_lookup_exact_match(fib_index, &bgp_102);
2548     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "100.100.100.102/32 presnet");
2549     dpo = fib_entry_contribute_ip_forwarding(fei);
2550
2551     fei  = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_1_s_32);
2552     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2553     fei  = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_2_s_32);
2554     dpo2 = fib_entry_contribute_ip_forwarding(fei);
2555
2556     lb = load_balance_get(dpo->dpoi_index);
2557     FIB_TEST((lb->lb_n_buckets == 2), "Recursive LB has %d bucket", lb->lb_n_buckets);
2558     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo->dpoi_index, 0)),
2559              "First via 10.10.10.1");
2560     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo->dpoi_index, 1)),
2561              "Second via 10.10.10.1");
2562
2563     fib_table_entry_path_remove(fib_index,
2564                                 &bgp_102,
2565                                 FIB_SOURCE_API,
2566                                 DPO_PROTO_IP4,
2567                                 &pfx_1_1_1_1_s_32.fp_addr,
2568                                 ~0, // no index provided.
2569                                 fib_index, // same as route's FIB
2570                                 1,
2571                                 FIB_ROUTE_PATH_FLAG_NONE);
2572     fib_table_entry_path_remove(fib_index,
2573                                 &bgp_102,
2574                                 FIB_SOURCE_API,
2575                                 DPO_PROTO_IP4,
2576                                 &pfx_1_1_1_2_s_32.fp_addr,
2577                                 ~0, // no index provided.
2578                                 fib_index, // same as route's FIB
2579                                 1,
2580                                 FIB_ROUTE_PATH_FLAG_NONE);
2581     fei = fib_table_lookup_exact_match(fib_index, &bgp_102);
2582     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "100.100.100.102/32 removed");
2583
2584     /*
2585      * remove the remaining recursives
2586      */
2587     fib_table_entry_path_remove(fib_index,
2588                                 &bgp_100_pfx,
2589                                 FIB_SOURCE_API,
2590                                 DPO_PROTO_IP4,
2591                                 &pfx_1_1_1_1_s_32.fp_addr,
2592                                 ~0, // no index provided.
2593                                 fib_index, // same as route's FIB
2594                                 1,
2595                                 FIB_ROUTE_PATH_FLAG_NONE);
2596     fib_table_entry_path_remove(fib_index,
2597                                 &bgp_101_pfx,
2598                                 FIB_SOURCE_API,
2599                                 DPO_PROTO_IP4,
2600                                 &pfx_1_1_1_1_s_32.fp_addr,
2601                                 ~0, // no index provided.
2602                                 fib_index, // same as route's FIB
2603                                 1,
2604                                 FIB_ROUTE_PATH_FLAG_NONE);
2605     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_100_pfx) ==
2606               FIB_NODE_INDEX_INVALID),
2607              "100.100.100.100/32 removed");
2608     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_101_pfx) ==
2609               FIB_NODE_INDEX_INVALID),
2610              "100.100.100.101/32 removed");
2611
2612     /*
2613      * -2 entry (2*BGP, the RR source is also API sourced). -1 shared path-list;
2614      */
2615     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
2616              fib_path_list_db_size());
2617     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
2618              fib_path_list_pool_size());
2619     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
2620              fib_entry_pool_size());
2621
2622     /*
2623      * Add a recursive route via a connected cover, using an adj-fib that does exist
2624      */
2625     fib_table_entry_path_add(fib_index,
2626                              &bgp_200_pfx,
2627                              FIB_SOURCE_API,
2628                              FIB_ENTRY_FLAG_NONE,
2629                              DPO_PROTO_IP4,
2630                              &nh_10_10_10_1,
2631                              ~0, // no index provided.
2632                              fib_index, // Same as route's FIB
2633                              1,
2634                              NULL,
2635                              FIB_ROUTE_PATH_FLAG_NONE);
2636
2637     /*
2638      * +1 entry. +1 shared path-list (recursive via 10.10.10.1)
2639      */
2640     FIB_TEST((2  == fib_path_list_db_size()),   "path list DB population:%d",
2641              fib_path_list_db_size());
2642     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
2643              fib_path_list_pool_size());
2644     FIB_TEST((ENBR+8 == fib_entry_pool_size()), "entry pool size is %d",
2645              fib_entry_pool_size());
2646
2647     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
2648     dpo = fib_entry_contribute_ip_forwarding(fei);
2649
2650     fei  = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
2651     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2652
2653     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo->dpoi_index, 0)),
2654              "200.200.200.200/32 is recursive via adj for 10.10.10.1");
2655
2656     FIB_TEST((FIB_ENTRY_FLAG_ATTACHED  == fib_entry_get_flags(fei)),
2657              "Flags set on RR via existing attached");
2658
2659     /*
2660      * Add a recursive route via a connected cover, using and adj-fib that does
2661      * not exist
2662      */
2663     ip46_address_t nh_10_10_10_3 = {
2664         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a03),
2665     };
2666     fib_prefix_t pfx_10_10_10_3 = {
2667         .fp_len = 32,
2668         .fp_proto = FIB_PROTOCOL_IP4,
2669         .fp_addr = nh_10_10_10_3,
2670     };
2671
2672     fib_table_entry_path_add(fib_index,
2673                              &bgp_201_pfx,
2674                              FIB_SOURCE_API,
2675                              FIB_ENTRY_FLAG_NONE,
2676                              DPO_PROTO_IP4,
2677                              &nh_10_10_10_3,
2678                              ~0, // no index provided.
2679                              fib_index,
2680                              1,
2681                              NULL,
2682                              FIB_ROUTE_PATH_FLAG_NONE);
2683
2684     /*
2685      * +2 entries (BGP and RR). +1 shared path-list (recursive via 10.10.10.3) and
2686      * one unshared non-recursive via 10.10.10.3
2687      */
2688     FIB_TEST((3  == fib_path_list_db_size()),   "path list DB population:%d",
2689              fib_path_list_db_size());
2690     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2691              fib_path_list_pool_size());
2692     FIB_TEST((ENBR+10 == fib_entry_pool_size()), "entry pool size is %d",
2693              fib_entry_pool_size());
2694
2695     ai_03 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
2696                                 VNET_LINK_IP4,
2697                                 &nh_10_10_10_3,
2698                                 tm->hw[0]->sw_if_index);
2699
2700     fei  = fib_table_lookup_exact_match(fib_index, &bgp_201_pfx);
2701     dpo  = fib_entry_contribute_ip_forwarding(fei);
2702     fei  = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3);
2703     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2704
2705     ai = fib_entry_get_adj(fei);
2706     FIB_TEST((ai == ai_03), "adj for 10.10.10.3/32 is via adj for 10.10.10.3");
2707     FIB_TEST(((FIB_ENTRY_FLAG_ATTACHED | FIB_ENTRY_FLAG_CONNECTED) ==
2708               fib_entry_get_flags(fei)),
2709              "Flags set on RR via non-existing attached");
2710
2711     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo->dpoi_index, 0)),
2712              "adj for 200.200.200.200/32 is recursive via adj for 10.10.10.3");
2713
2714     adj_unlock(ai_03);
2715
2716     /*
2717      * remove the recursives
2718      */
2719     fib_table_entry_path_remove(fib_index,
2720                                 &bgp_200_pfx,
2721                                 FIB_SOURCE_API,
2722                                 DPO_PROTO_IP4,
2723                                 &nh_10_10_10_1,
2724                                 ~0, // no index provided.
2725                                 fib_index, // same as route's FIB
2726                                 1,
2727                                 FIB_ROUTE_PATH_FLAG_NONE);
2728     fib_table_entry_path_remove(fib_index,
2729                                 &bgp_201_pfx,
2730                                 FIB_SOURCE_API,
2731                                 DPO_PROTO_IP4,
2732                                 &nh_10_10_10_3,
2733                                 ~0, // no index provided.
2734                                 fib_index, // same as route's FIB
2735                                 1,
2736                                 FIB_ROUTE_PATH_FLAG_NONE);
2737
2738     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_201_pfx) ==
2739               FIB_NODE_INDEX_INVALID),
2740              "200.200.200.201/32 removed");
2741     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_200_pfx) ==
2742               FIB_NODE_INDEX_INVALID),
2743              "200.200.200.200/32 removed");
2744     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3) ==
2745               FIB_NODE_INDEX_INVALID),
2746              "10.10.10.3/32 removed");
2747
2748     /*
2749      * -3 entries (2*BGP and RR). -2 shared path-list (recursive via 10.10.10.3 &
2750      *  10.10.10.1) and one unshared non-recursive via 10.10.10.3
2751      */
2752     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
2753              fib_path_list_db_size());
2754     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
2755              fib_path_list_pool_size());
2756     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
2757              fib_entry_pool_size());
2758
2759
2760     /*
2761      * RECURSION LOOPS
2762      *  Add 5.5.5.5/32 -> 5.5.5.6/32 -> 5.5.5.7/32 -> 5.5.5.5/32
2763      */
2764     fib_prefix_t pfx_5_5_5_5_s_32 = {
2765         .fp_len = 32,
2766         .fp_proto = FIB_PROTOCOL_IP4,
2767         .fp_addr = {
2768             .ip4.as_u32 = clib_host_to_net_u32(0x05050505),
2769         },
2770     };
2771     fib_prefix_t pfx_5_5_5_6_s_32 = {
2772         .fp_len = 32,
2773         .fp_proto = FIB_PROTOCOL_IP4,
2774         .fp_addr = {
2775             .ip4.as_u32 = clib_host_to_net_u32(0x05050506),
2776         },
2777     };
2778     fib_prefix_t pfx_5_5_5_7_s_32 = {
2779         .fp_len = 32,
2780         .fp_proto = FIB_PROTOCOL_IP4,
2781         .fp_addr = {
2782             .ip4.as_u32 = clib_host_to_net_u32(0x05050507),
2783         },
2784     };
2785
2786     fib_table_entry_path_add(fib_index,
2787                              &pfx_5_5_5_5_s_32,
2788                              FIB_SOURCE_API,
2789                              FIB_ENTRY_FLAG_NONE,
2790                              DPO_PROTO_IP4,
2791                              &pfx_5_5_5_6_s_32.fp_addr,
2792                              ~0, // no index provided.
2793                              fib_index,
2794                              1,
2795                              NULL,
2796                              FIB_ROUTE_PATH_FLAG_NONE);
2797     fib_table_entry_path_add(fib_index,
2798                              &pfx_5_5_5_6_s_32,
2799                              FIB_SOURCE_API,
2800                              FIB_ENTRY_FLAG_NONE,
2801                              DPO_PROTO_IP4,
2802                              &pfx_5_5_5_7_s_32.fp_addr,
2803                              ~0, // no index provided.
2804                              fib_index,
2805                              1,
2806                              NULL,
2807                              FIB_ROUTE_PATH_FLAG_NONE);
2808     fib_table_entry_path_add(fib_index,
2809                              &pfx_5_5_5_7_s_32,
2810                              FIB_SOURCE_API,
2811                              FIB_ENTRY_FLAG_NONE,
2812                              DPO_PROTO_IP4,
2813                              &pfx_5_5_5_5_s_32.fp_addr,
2814                              ~0, // no index provided.
2815                              fib_index,
2816                              1,
2817                              NULL,
2818                              FIB_ROUTE_PATH_FLAG_NONE);
2819     /*
2820      * +3 entries, +3 shared path-list
2821      */
2822     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2823              fib_path_list_db_size());
2824     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2825              fib_path_list_pool_size());
2826     FIB_TEST((ENBR+10 == fib_entry_pool_size()), "entry pool size is %d",
2827              fib_entry_pool_size());
2828
2829     /*
2830      * All the entries have only looped paths, so they are all drop
2831      */
2832     fei = fib_table_lookup(fib_index, &pfx_5_5_5_7_s_32);
2833     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2834              "LB for 5.5.5.7/32 is via adj for DROP");
2835     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2836     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2837              "LB for 5.5.5.5/32 is via adj for DROP");
2838     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
2839     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2840              "LB for 5.5.5.6/32 is via adj for DROP");
2841
2842     /*
2843      * provide 5.5.5.6/32 with alternate path.
2844      * this will allow only 5.5.5.6/32 to forward with this path, the others
2845      * are still drop since the loop is still present.
2846      */
2847     fib_table_entry_path_add(fib_index,
2848                              &pfx_5_5_5_6_s_32,
2849                              FIB_SOURCE_API,
2850                              FIB_ENTRY_FLAG_NONE,
2851                              DPO_PROTO_IP4,
2852                              &nh_10_10_10_1,
2853                              tm->hw[0]->sw_if_index,
2854                              ~0,
2855                              1,
2856                              NULL,
2857                              FIB_ROUTE_PATH_FLAG_NONE);
2858
2859     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
2860     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2861
2862     lb = load_balance_get(dpo1->dpoi_index);
2863     FIB_TEST((lb->lb_n_buckets == 1), "5.5.5.6 LB has %d bucket", lb->lb_n_buckets);
2864
2865     dpo2 = load_balance_get_bucket(dpo1->dpoi_index, 0);
2866     FIB_TEST(DPO_ADJACENCY == dpo2->dpoi_type, "type is %d", dpo2->dpoi_type);
2867     FIB_TEST((ai_01 == dpo2->dpoi_index),
2868              "5.5.5.6 bucket 0 resolves via 10.10.10.2");
2869
2870     fei = fib_table_lookup(fib_index, &pfx_5_5_5_7_s_32);
2871     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2872              "LB for 5.5.5.7/32 is via adj for DROP");
2873     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2874     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2875              "LB for 5.5.5.5/32 is via adj for DROP");
2876
2877     /*
2878      * remove the alternate path for 5.5.5.6/32
2879      * back to all drop
2880      */
2881     fib_table_entry_path_remove(fib_index,
2882                                 &pfx_5_5_5_6_s_32,
2883                                 FIB_SOURCE_API,
2884                                 DPO_PROTO_IP4,
2885                                 &nh_10_10_10_1,
2886                                 tm->hw[0]->sw_if_index,
2887                                 ~0,
2888                                 1,
2889                                 FIB_ROUTE_PATH_FLAG_NONE);
2890
2891     fei = fib_table_lookup(fib_index, &pfx_5_5_5_7_s_32);
2892     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2893              "LB for 5.5.5.7/32 is via adj for DROP");
2894     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2895     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2896              "LB for 5.5.5.5/32 is via adj for DROP");
2897     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
2898     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2899              "LB for 5.5.5.6/32 is via adj for DROP");
2900
2901     /*
2902      * break the loop by giving 5.5.5.5/32 a new set of paths
2903      * expect all to forward via this new path.
2904      */
2905     fib_table_entry_update_one_path(fib_index,
2906                                     &pfx_5_5_5_5_s_32,
2907                                     FIB_SOURCE_API,
2908                                     FIB_ENTRY_FLAG_NONE,
2909                                     DPO_PROTO_IP4,
2910                                     &nh_10_10_10_1,
2911                                     tm->hw[0]->sw_if_index,
2912                                     ~0, // invalid fib index
2913                                     1,
2914                                     NULL,
2915                                     FIB_ROUTE_PATH_FLAG_NONE);
2916
2917     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2918     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2919     lb = load_balance_get(dpo1->dpoi_index);
2920     FIB_TEST((lb->lb_n_buckets == 1), "5.5.5.5 LB has %d bucket", lb->lb_n_buckets);
2921
2922     dpo2 = load_balance_get_bucket(dpo1->dpoi_index, 0);
2923     FIB_TEST(DPO_ADJACENCY == dpo2->dpoi_type, "type is %d", dpo2->dpoi_type);
2924     FIB_TEST((ai_01 == dpo2->dpoi_index),
2925              "5.5.5.5 bucket 0 resolves via 10.10.10.2");
2926
2927     fei = fib_table_lookup_exact_match(fib_index, &pfx_5_5_5_7_s_32);
2928     dpo2 = fib_entry_contribute_ip_forwarding(fei);
2929
2930     lb = load_balance_get(dpo2->dpoi_index);
2931     FIB_TEST((lb->lb_n_buckets == 1), "Recursive LB has %d bucket", lb->lb_n_buckets);
2932     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo2->dpoi_index, 0)),
2933              "5.5.5.5.7 via 5.5.5.5");
2934
2935     fei = fib_table_lookup_exact_match(fib_index, &pfx_5_5_5_6_s_32);
2936     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2937
2938     lb = load_balance_get(dpo1->dpoi_index);
2939     FIB_TEST((lb->lb_n_buckets == 1), "Recursive LB has %d bucket", lb->lb_n_buckets);
2940     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo1->dpoi_index, 0)),
2941              "5.5.5.5.6 via 5.5.5.7");
2942
2943     /*
2944      * revert back to the loop. so we can remove the prefixes with
2945      * the loop intact
2946      */
2947     fib_table_entry_update_one_path(fib_index,
2948                                     &pfx_5_5_5_5_s_32,
2949                                     FIB_SOURCE_API,
2950                                     FIB_ENTRY_FLAG_NONE,
2951                                     DPO_PROTO_IP4,
2952                                     &pfx_5_5_5_6_s_32.fp_addr,
2953                                     ~0, // no index provided.
2954                                     fib_index,
2955                                     1,
2956                                     NULL,
2957                                     FIB_ROUTE_PATH_FLAG_NONE);
2958
2959     fei = fib_table_lookup(fib_index, &pfx_5_5_5_7_s_32);
2960     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2961              "LB for 5.5.5.7/32 is via adj for DROP");
2962     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2963     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2964              "LB for 5.5.5.5/32 is via adj for DROP");
2965     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
2966     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2967              "LB for 5.5.5.6/32 is via adj for DROP");
2968
2969     /*
2970      * remove all the 5.5.5.x/32 prefixes
2971      */
2972     fib_table_entry_path_remove(fib_index,
2973                                 &pfx_5_5_5_5_s_32,
2974                                 FIB_SOURCE_API,
2975                                 DPO_PROTO_IP4,
2976                                 &pfx_5_5_5_6_s_32.fp_addr,
2977                                 ~0, // no index provided.
2978                                 fib_index, // same as route's FIB
2979                                 1,
2980                                 FIB_ROUTE_PATH_FLAG_NONE);
2981     fib_table_entry_path_remove(fib_index,
2982                                 &pfx_5_5_5_6_s_32,
2983                                 FIB_SOURCE_API,
2984                                 DPO_PROTO_IP4,
2985                                 &pfx_5_5_5_7_s_32.fp_addr,
2986                                 ~0, // no index provided.
2987                                 fib_index, // same as route's FIB
2988                                 1,
2989                                 FIB_ROUTE_PATH_FLAG_NONE);
2990     fib_table_entry_path_remove(fib_index,
2991                                 &pfx_5_5_5_7_s_32,
2992                                 FIB_SOURCE_API,
2993                                 DPO_PROTO_IP4,
2994                                 &pfx_5_5_5_5_s_32.fp_addr,
2995                                 ~0, // no index provided.
2996                                 fib_index, // same as route's FIB
2997                                 1,
2998                                 FIB_ROUTE_PATH_FLAG_NONE);
2999     fib_table_entry_path_remove(fib_index,
3000                                 &pfx_5_5_5_6_s_32,
3001                                 FIB_SOURCE_API,
3002                                 DPO_PROTO_IP4,
3003                                 &nh_10_10_10_2,
3004                                 ~0, // no index provided.
3005                                 fib_index, // same as route's FIB
3006                                 1,
3007                                 FIB_ROUTE_PATH_FLAG_NONE);
3008
3009     /*
3010      * -3 entries, -3 shared path-list
3011      */
3012     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3013              fib_path_list_db_size());
3014     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3015              fib_path_list_pool_size());
3016     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3017              fib_entry_pool_size());
3018
3019     /*
3020      * Single level loop 5.5.5.5/32 via 5.5.5.5/32
3021      */
3022     fib_table_entry_path_add(fib_index,
3023                              &pfx_5_5_5_6_s_32,
3024                              FIB_SOURCE_API,
3025                              FIB_ENTRY_FLAG_NONE,
3026                              DPO_PROTO_IP4,
3027                              &pfx_5_5_5_6_s_32.fp_addr,
3028                              ~0, // no index provided.
3029                              fib_index,
3030                              1,
3031                              NULL,
3032                              FIB_ROUTE_PATH_FLAG_NONE);
3033     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
3034     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
3035              "1-level 5.5.5.6/32 loop is via adj for DROP");
3036
3037     fib_table_entry_path_remove(fib_index,
3038                                 &pfx_5_5_5_6_s_32,
3039                                 FIB_SOURCE_API,
3040                                 DPO_PROTO_IP4,
3041                                 &pfx_5_5_5_6_s_32.fp_addr,
3042                                 ~0, // no index provided.
3043                                 fib_index, // same as route's FIB
3044                                 1,
3045                                 FIB_ROUTE_PATH_FLAG_NONE);
3046     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3047              fib_table_lookup_exact_match(fib_index, &pfx_5_5_5_6_s_32),
3048              "1-level 5.5.5.6/32 loop is removed");
3049
3050     /*
3051      * A recursive route whose next-hop is covered by the prefix.
3052      * This would mean the via-fib, which inherits forwarding from its
3053      * cover, thus picks up forwarding from the prfix, which is via the
3054      * via-fib, and we have a loop.
3055      */
3056     fib_prefix_t pfx_23_23_23_0_s_24 = {
3057         .fp_len = 24,
3058         .fp_proto = FIB_PROTOCOL_IP4,
3059         .fp_addr = {
3060             .ip4.as_u32 = clib_host_to_net_u32(0x17171700),
3061         },
3062     };
3063     fib_prefix_t pfx_23_23_23_23_s_32 = {
3064         .fp_len = 32,
3065         .fp_proto = FIB_PROTOCOL_IP4,
3066         .fp_addr = {
3067             .ip4.as_u32 = clib_host_to_net_u32(0x17171717),
3068         },
3069     };
3070     fei = fib_table_entry_path_add(fib_index,
3071                                    &pfx_23_23_23_0_s_24,
3072                                    FIB_SOURCE_API,
3073                                    FIB_ENTRY_FLAG_NONE,
3074                                    DPO_PROTO_IP4,
3075                                    &pfx_23_23_23_23_s_32.fp_addr,
3076                                    ~0, // recursive
3077                                    fib_index,
3078                                    1,
3079                                    NULL,
3080                                    FIB_ROUTE_PATH_FLAG_NONE);
3081     dpo = fib_entry_contribute_ip_forwarding(fei);
3082     FIB_TEST(load_balance_is_drop(dpo),
3083              "23.23.23.0/24 via covered is DROP");
3084     fib_table_entry_delete_index(fei, FIB_SOURCE_API);
3085
3086     /*
3087      * add-remove test. no change.
3088      */
3089     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3090              fib_path_list_db_size());
3091     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3092              fib_path_list_pool_size());
3093     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3094              fib_entry_pool_size());
3095
3096     /*
3097      * Make the default route recursive via a unknown next-hop. Thus the
3098      * next hop's cover would be the default route
3099      */
3100     fei = fib_table_entry_path_add(fib_index,
3101                                    &pfx_0_0_0_0_s_0,
3102                                    FIB_SOURCE_API,
3103                                    FIB_ENTRY_FLAG_NONE,
3104                                    DPO_PROTO_IP4,
3105                                    &pfx_23_23_23_23_s_32.fp_addr,
3106                                    ~0, // recursive
3107                                    fib_index,
3108                                    1,
3109                                    NULL,
3110                                    FIB_ROUTE_PATH_FLAG_NONE);
3111     dpo = fib_entry_contribute_ip_forwarding(fei);
3112     FIB_TEST(load_balance_is_drop(dpo),
3113              "0.0.0.0.0/0 via is DROP");
3114     FIB_TEST((fib_entry_get_resolving_interface(fei) == ~0),
3115              "no resolving interface for looped 0.0.0.0/0");
3116
3117     fei = fib_table_lookup_exact_match(fib_index, &pfx_23_23_23_23_s_32);
3118     dpo = fib_entry_contribute_ip_forwarding(fei);
3119     FIB_TEST(load_balance_is_drop(dpo),
3120              "23.23.23.23/32 via is DROP");
3121     FIB_TEST((fib_entry_get_resolving_interface(fei) == ~0),
3122              "no resolving interface for looped 23.23.23.23/32");
3123
3124     fib_table_entry_delete(fib_index, &pfx_0_0_0_0_s_0, FIB_SOURCE_API);
3125
3126     /*
3127      * A recursive route with recursion constraints.
3128      *  200.200.200.200/32 via 1.1.1.1 is recurse via host constrained
3129      */
3130     fib_table_entry_path_add(fib_index,
3131                              &bgp_200_pfx,
3132                              FIB_SOURCE_API,
3133                              FIB_ENTRY_FLAG_NONE,
3134                              DPO_PROTO_IP4,
3135                              &nh_1_1_1_1,
3136                              ~0,
3137                              fib_index,
3138                              1,
3139                              NULL,
3140                              FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3141
3142     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_1_s_32);
3143     dpo2 = fib_entry_contribute_ip_forwarding(fei);
3144
3145     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3146     dpo1 = fib_entry_contribute_ip_forwarding(fei);
3147
3148     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo1->dpoi_index, 0)),
3149              "adj for 200.200.200.200/32 is recursive via adj for 1.1.1.1");
3150
3151     /*
3152      * save the load-balance. we expect it to be inplace modified
3153      */
3154     lb = load_balance_get(dpo1->dpoi_index);
3155
3156     /*
3157      * add a covering prefix for the via fib that would otherwise serve
3158      * as the resolving route when the host is removed
3159      */
3160     fib_table_entry_path_add(fib_index,
3161                              &pfx_1_1_1_0_s_28,
3162                              FIB_SOURCE_API,
3163                              FIB_ENTRY_FLAG_NONE,
3164                              DPO_PROTO_IP4,
3165                              &nh_10_10_10_1,
3166                              tm->hw[0]->sw_if_index,
3167                              ~0, // invalid fib index
3168                              1,
3169                              NULL,
3170                              FIB_ROUTE_PATH_FLAG_NONE);
3171     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_0_s_28);
3172     ai = fib_entry_get_adj(fei);
3173     FIB_TEST((ai == ai_01),
3174              "adj for 1.1.1.0/28 is via adj for 1.1.1.1");
3175
3176     /*
3177      * remove the host via FIB - expect the BGP prefix to be drop
3178      */
3179     fib_table_entry_path_remove(fib_index,
3180                                 &pfx_1_1_1_1_s_32,
3181                                 FIB_SOURCE_API,
3182                                 DPO_PROTO_IP4,
3183                                 &nh_10_10_10_1,
3184                                 tm->hw[0]->sw_if_index,
3185                                 ~0, // invalid fib index
3186                                 1,
3187                                 FIB_ROUTE_PATH_FLAG_NONE);
3188
3189     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo1->dpoi_index, 0)),
3190              "adj for 200.200.200.200/32 is recursive via adj for DROP");
3191
3192     /*
3193      * add the via-entry host reoute back. expect to resolve again
3194      */
3195     fib_table_entry_path_add(fib_index,
3196                              &pfx_1_1_1_1_s_32,
3197                              FIB_SOURCE_API,
3198                              FIB_ENTRY_FLAG_NONE,
3199                              DPO_PROTO_IP4,
3200                              &nh_10_10_10_1,
3201                              tm->hw[0]->sw_if_index,
3202                              ~0, // invalid fib index
3203                              1,
3204                              NULL,
3205                              FIB_ROUTE_PATH_FLAG_NONE);
3206     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo1->dpoi_index, 0)),
3207              "adj for 200.200.200.200/32 is recursive via adj for 1.1.1.1");
3208
3209     /*
3210      * add another path for the recursive. it will then have 2.
3211      */
3212     fib_prefix_t pfx_1_1_1_3_s_32 = {
3213         .fp_len = 32,
3214         .fp_proto = FIB_PROTOCOL_IP4,
3215         .fp_addr = {
3216             .ip4.as_u32 = clib_host_to_net_u32(0x01010103),
3217         },
3218     };
3219     fib_table_entry_path_add(fib_index,
3220                              &pfx_1_1_1_3_s_32,
3221                              FIB_SOURCE_API,
3222                              FIB_ENTRY_FLAG_NONE,
3223                              DPO_PROTO_IP4,
3224                              &nh_10_10_10_2,
3225                              tm->hw[0]->sw_if_index,
3226                              ~0, // invalid fib index
3227                              1,
3228                              NULL,
3229                              FIB_ROUTE_PATH_FLAG_NONE);
3230
3231     fib_table_entry_path_add(fib_index,
3232                              &bgp_200_pfx,
3233                              FIB_SOURCE_API,
3234                              FIB_ENTRY_FLAG_NONE,
3235                              DPO_PROTO_IP4,
3236                              &pfx_1_1_1_3_s_32.fp_addr,
3237                              ~0,
3238                              fib_index,
3239                              1,
3240                              NULL,
3241                              FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3242
3243     /*
3244      * add a bunch load more entries using this path combo so that we get
3245      * an LB-map created.
3246      */
3247 #define N_P 128
3248     fib_prefix_t bgp_78s[N_P];
3249     for (ii = 0; ii < N_P; ii++)
3250     {
3251         bgp_78s[ii].fp_len = 32;
3252         bgp_78s[ii].fp_proto = FIB_PROTOCOL_IP4;
3253         bgp_78s[ii].fp_addr.ip4.as_u32 = clib_host_to_net_u32(0x4e000000+ii);
3254
3255
3256         fib_table_entry_path_add(fib_index,
3257                                  &bgp_78s[ii],
3258                                  FIB_SOURCE_API,
3259                                  FIB_ENTRY_FLAG_NONE,
3260                                  DPO_PROTO_IP4,
3261                                  &pfx_1_1_1_3_s_32.fp_addr,
3262                                  ~0,
3263                                  fib_index,
3264                                  1,
3265                                  NULL,
3266                                  FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3267         fib_table_entry_path_add(fib_index,
3268                                  &bgp_78s[ii],
3269                                  FIB_SOURCE_API,
3270                                  FIB_ENTRY_FLAG_NONE,
3271                                  DPO_PROTO_IP4,
3272                                  &nh_1_1_1_1,
3273                                  ~0,
3274                                  fib_index,
3275                                  1,
3276                                  NULL,
3277                                  FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3278     }
3279
3280     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3281     dpo = fib_entry_contribute_ip_forwarding(fei);
3282
3283     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_1_s_32);
3284     dpo2 = fib_entry_contribute_ip_forwarding(fei);
3285     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo->dpoi_index, 0)),
3286              "adj for 200.200.200.200/32 is recursive via adj for 1.1.1.1");
3287     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_3_s_32);
3288     dpo1 = fib_entry_contribute_ip_forwarding(fei);
3289     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo->dpoi_index, 1)),
3290              "adj for 200.200.200.200/32 is recursive via adj for 1.1.1.3");
3291
3292     /*
3293      * expect the lb-map used by the recursive's load-balance is using both buckets
3294      */
3295     load_balance_map_t *lbm;
3296     index_t lbmi;
3297
3298     lb = load_balance_get(dpo->dpoi_index);
3299     lbmi = lb->lb_map;
3300     load_balance_map_lock(lbmi);
3301     lbm = load_balance_map_get(lbmi);
3302
3303     FIB_TEST(lbm->lbm_buckets[0] == 0,
3304              "LB maps's bucket 0 is %d",
3305              lbm->lbm_buckets[0]);
3306     FIB_TEST(lbm->lbm_buckets[1] == 1,
3307              "LB maps's bucket 1 is %d",
3308              lbm->lbm_buckets[1]);
3309
3310     /*
3311      * withdraw one of the /32 via-entrys.
3312      * that ECMP path will be unresolved and forwarding should continue on the
3313      * other available path. this is an iBGP PIC edge failover.
3314      * Test the forwarding changes without re-fetching the adj from the
3315      * recursive entry. this ensures its the same one that is updated; i.e. an
3316      * inplace-modify.
3317      */
3318     fib_table_entry_path_remove(fib_index,
3319                                 &pfx_1_1_1_1_s_32,
3320                                 FIB_SOURCE_API,
3321                                 DPO_PROTO_IP4,
3322                                 &nh_10_10_10_1,
3323                                 tm->hw[0]->sw_if_index,
3324                                 ~0, // invalid fib index
3325                                 1,
3326                                 FIB_ROUTE_PATH_FLAG_NONE);
3327
3328     /* suspend so the update walk kicks int */
3329     vlib_process_suspend(vlib_get_main(), 1e-5);
3330
3331     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3332     FIB_TEST(!dpo_cmp(dpo, fib_entry_contribute_ip_forwarding(fei)),
3333              "post PIC 200.200.200.200/32 was inplace modified");
3334
3335     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket_i(lb, 0)),
3336              "post PIC adj for 200.200.200.200/32 is recursive"
3337              " via adj for 1.1.1.3");
3338
3339     /*
3340      * the LB maps that was locked above should have been modified to remove
3341      * the path that was down, and thus its bucket points to a path that is
3342      * still up.
3343      */
3344     FIB_TEST(lbm->lbm_buckets[0] == 1,
3345              "LB maps's bucket 0 is %d",
3346              lbm->lbm_buckets[0]);
3347     FIB_TEST(lbm->lbm_buckets[1] == 1,
3348              "LB maps's bucket 1 is %d",
3349              lbm->lbm_buckets[1]);
3350
3351     load_balance_map_unlock(lbmi);
3352
3353     /*
3354      * add it back. again
3355      */
3356     fib_table_entry_path_add(fib_index,
3357                              &pfx_1_1_1_1_s_32,
3358                              FIB_SOURCE_API,
3359                              FIB_ENTRY_FLAG_NONE,
3360                              DPO_PROTO_IP4,
3361                              &nh_10_10_10_1,
3362                              tm->hw[0]->sw_if_index,
3363                              ~0, // invalid fib index
3364                              1,
3365                              NULL,
3366                              FIB_ROUTE_PATH_FLAG_NONE);
3367
3368     /* suspend so the update walk kicks in */
3369     vlib_process_suspend(vlib_get_main(), 1e-5);
3370
3371     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket_i(lb, 0)),
3372              "post PIC recovery adj for 200.200.200.200/32 is recursive "
3373              "via adj for 1.1.1.1");
3374     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket_i(lb, 1)),
3375              "post PIC recovery adj for 200.200.200.200/32 is recursive "
3376              "via adj for 1.1.1.3");
3377
3378     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3379     dpo = fib_entry_contribute_ip_forwarding(fei);
3380     FIB_TEST(lb == load_balance_get(dpo->dpoi_index),
3381              "post PIC 200.200.200.200/32 was inplace modified");
3382
3383     /*
3384      * add a 3rd path. this makes the LB 16 buckets.
3385      */
3386     fib_table_entry_path_add(fib_index,
3387                              &bgp_200_pfx,
3388                              FIB_SOURCE_API,
3389                              FIB_ENTRY_FLAG_NONE,
3390                              DPO_PROTO_IP4,
3391                              &pfx_1_1_1_2_s_32.fp_addr,
3392                              ~0,
3393                              fib_index,
3394                              1,
3395                              NULL,
3396                              FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3397     for (ii = 0; ii < N_P; ii++)
3398     {
3399         fib_table_entry_path_add(fib_index,
3400                                  &bgp_78s[ii],
3401                                  FIB_SOURCE_API,
3402                                  FIB_ENTRY_FLAG_NONE,
3403                                  DPO_PROTO_IP4,
3404                                  &pfx_1_1_1_2_s_32.fp_addr,
3405                                  ~0,
3406                                  fib_index,
3407                                  1,
3408                                  NULL,
3409                                  FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3410     }
3411
3412     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3413     dpo = fib_entry_contribute_ip_forwarding(fei);
3414     FIB_TEST(lb == load_balance_get(dpo->dpoi_index),
3415              "200.200.200.200/32 was inplace modified for 3rd path");
3416     FIB_TEST(16 == lb->lb_n_buckets,
3417              "200.200.200.200/32 was inplace modified for 3rd path to 16 buckets");
3418
3419     lbmi = lb->lb_map;
3420     load_balance_map_lock(lbmi);
3421     lbm = load_balance_map_get(lbmi);
3422
3423     for (ii = 0; ii < 16; ii++)
3424     {
3425         FIB_TEST(lbm->lbm_buckets[ii] == ii,
3426                  "LB Map for 200.200.200.200/32 at %d is %d",
3427                  ii, lbm->lbm_buckets[ii]);
3428     }
3429
3430     /*
3431      * trigger PIC by removing the first via-entry
3432      * the first 6 buckets of the map should map to the next 6
3433      */
3434     fib_table_entry_path_remove(fib_index,
3435                                 &pfx_1_1_1_1_s_32,
3436                                 FIB_SOURCE_API,
3437                                 DPO_PROTO_IP4,
3438                                 &nh_10_10_10_1,
3439                                 tm->hw[0]->sw_if_index,
3440                                 ~0,
3441                                 1,
3442                                 FIB_ROUTE_PATH_FLAG_NONE);
3443     /* suspend so the update walk kicks int */
3444     vlib_process_suspend(vlib_get_main(), 1e-5);
3445
3446     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3447     dpo = fib_entry_contribute_ip_forwarding(fei);
3448     FIB_TEST(lb == load_balance_get(dpo->dpoi_index),
3449              "200.200.200.200/32 was inplace modified for 3rd path");
3450     FIB_TEST(2 == lb->lb_n_buckets,
3451              "200.200.200.200/32 was inplace modified for 3rd path remove to 2 buckets");
3452
3453     for (ii = 0; ii < 6; ii++)
3454     {
3455         FIB_TEST(lbm->lbm_buckets[ii] == ii+6,
3456                  "LB Map for 200.200.200.200/32 at %d is %d",
3457                  ii, lbm->lbm_buckets[ii]);
3458     }
3459     for (ii = 6; ii < 16; ii++)
3460     {
3461         FIB_TEST(lbm->lbm_buckets[ii] == ii,
3462                  "LB Map for 200.200.200.200/32 at %d is %d",
3463                  ii, lbm->lbm_buckets[ii]);
3464     }
3465     load_balance_map_unlock(lbmi);
3466
3467     /*
3468      * tidy up
3469      */
3470     fib_table_entry_path_add(fib_index,
3471                              &pfx_1_1_1_1_s_32,
3472                              FIB_SOURCE_API,
3473                              FIB_ENTRY_FLAG_NONE,
3474                              DPO_PROTO_IP4,
3475                              &nh_10_10_10_1,
3476                              tm->hw[0]->sw_if_index,
3477                              ~0,
3478                              1,
3479                              NULL,
3480                              FIB_ROUTE_PATH_FLAG_NONE);
3481
3482     for (ii = 0; ii < N_P; ii++)
3483     {
3484         fib_table_entry_delete(fib_index,
3485                                &bgp_78s[ii],
3486                                FIB_SOURCE_API);
3487         FIB_TEST((FIB_NODE_INDEX_INVALID ==
3488                   fib_table_lookup_exact_match(fib_index, &bgp_78s[ii])),
3489                  "%U removed",
3490                  format_fib_prefix, &bgp_78s[ii]);
3491     }
3492     fib_table_entry_path_remove(fib_index,
3493                                 &bgp_200_pfx,
3494                                 FIB_SOURCE_API,
3495                                 DPO_PROTO_IP4,
3496                                 &pfx_1_1_1_2_s_32.fp_addr,
3497                                 ~0,
3498                                 fib_index,
3499                                 1,
3500                                 MPLS_LABEL_INVALID);
3501     fib_table_entry_path_remove(fib_index,
3502                                 &bgp_200_pfx,
3503                                 FIB_SOURCE_API,
3504                                 DPO_PROTO_IP4,
3505                                 &nh_1_1_1_1,
3506                                 ~0,
3507                                 fib_index,
3508                                 1,
3509                                 FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3510     fib_table_entry_path_remove(fib_index,
3511                                 &bgp_200_pfx,
3512                                 FIB_SOURCE_API,
3513                                 DPO_PROTO_IP4,
3514                                 &pfx_1_1_1_3_s_32.fp_addr,
3515                                 ~0,
3516                                 fib_index,
3517                                 1,
3518                                 FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3519     fib_table_entry_delete(fib_index,
3520                            &pfx_1_1_1_3_s_32,
3521                            FIB_SOURCE_API);
3522     fib_table_entry_delete(fib_index,
3523                            &pfx_1_1_1_0_s_28,
3524                            FIB_SOURCE_API);
3525     /* suspend so the update walk kicks int */
3526     vlib_process_suspend(vlib_get_main(), 1e-5);
3527     FIB_TEST((FIB_NODE_INDEX_INVALID ==
3528               fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_0_s_28)),
3529              "1.1.1.1/28 removed");
3530     FIB_TEST((FIB_NODE_INDEX_INVALID ==
3531               fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_3_s_32)),
3532              "1.1.1.3/32 removed");
3533     FIB_TEST((FIB_NODE_INDEX_INVALID ==
3534               fib_table_lookup_exact_match(fib_index, &bgp_200_pfx)),
3535              "200.200.200.200/32 removed");
3536
3537     /*
3538      * add-remove test. no change.
3539      */
3540     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3541              fib_path_list_db_size());
3542     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3543              fib_path_list_pool_size());
3544     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3545              fib_entry_pool_size());
3546
3547     /*
3548      * A route whose paths are built up iteratively and then removed
3549      * all at once
3550      */
3551     fib_prefix_t pfx_4_4_4_4_s_32 = {
3552         .fp_len = 32,
3553         .fp_proto = FIB_PROTOCOL_IP4,
3554         .fp_addr = {
3555             /* 4.4.4.4/32 */
3556             .ip4.as_u32 = clib_host_to_net_u32(0x04040404),
3557         },
3558     };
3559
3560     fib_table_entry_path_add(fib_index,
3561                              &pfx_4_4_4_4_s_32,
3562                              FIB_SOURCE_API,
3563                              FIB_ENTRY_FLAG_NONE,
3564                              DPO_PROTO_IP4,
3565                              &nh_10_10_10_1,
3566                              tm->hw[0]->sw_if_index,
3567                              ~0,
3568                              1,
3569                              NULL,
3570                              FIB_ROUTE_PATH_FLAG_NONE);
3571     fib_table_entry_path_add(fib_index,
3572                              &pfx_4_4_4_4_s_32,
3573                              FIB_SOURCE_API,
3574                              FIB_ENTRY_FLAG_NONE,
3575                              DPO_PROTO_IP4,
3576                              &nh_10_10_10_2,
3577                              tm->hw[0]->sw_if_index,
3578                              ~0,
3579                              1,
3580                              NULL,
3581                              FIB_ROUTE_PATH_FLAG_NONE);
3582     fib_table_entry_path_add(fib_index,
3583                              &pfx_4_4_4_4_s_32,
3584                              FIB_SOURCE_API,
3585                              FIB_ENTRY_FLAG_NONE,
3586                              DPO_PROTO_IP4,
3587                              &nh_10_10_10_3,
3588                              tm->hw[0]->sw_if_index,
3589                              ~0,
3590                              1,
3591                              NULL,
3592                              FIB_ROUTE_PATH_FLAG_NONE);
3593     FIB_TEST(FIB_NODE_INDEX_INVALID !=
3594              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3595              "4.4.4.4/32 present");
3596
3597     fib_table_entry_delete(fib_index,
3598                            &pfx_4_4_4_4_s_32,
3599                            FIB_SOURCE_API);
3600     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3601              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3602              "4.4.4.4/32 removed");
3603
3604     /*
3605      * add-remove test. no change.
3606      */
3607     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3608              fib_path_list_db_size());
3609     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3610              fib_path_list_pool_size());
3611     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3612              fib_entry_pool_size());
3613
3614     /*
3615      * A route with multiple paths at once
3616      */
3617     fib_route_path_t *r_paths = NULL;
3618
3619     for (ii = 0; ii < 4; ii++)
3620     {
3621         fib_route_path_t r_path = {
3622             .frp_proto = DPO_PROTO_IP4,
3623             .frp_addr = {
3624                 .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02 + ii),
3625             },
3626             .frp_sw_if_index = tm->hw[0]->sw_if_index,
3627             .frp_weight = 1,
3628             .frp_fib_index = ~0,
3629         };
3630         vec_add1(r_paths, r_path);
3631     }
3632
3633     fib_table_entry_update(fib_index,
3634                            &pfx_4_4_4_4_s_32,
3635                            FIB_SOURCE_API,
3636                            FIB_ENTRY_FLAG_NONE,
3637                            r_paths);
3638
3639     fei = fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32);
3640     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "4.4.4.4/32 present");
3641     dpo = fib_entry_contribute_ip_forwarding(fei);
3642
3643     lb = load_balance_get(dpo->dpoi_index);
3644     FIB_TEST((lb->lb_n_buckets == 4), "4.4.4.4/32 lb over %d paths", lb->lb_n_buckets);
3645
3646     fib_table_entry_delete(fib_index,
3647                            &pfx_4_4_4_4_s_32,
3648                            FIB_SOURCE_API);
3649     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3650              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3651              "4.4.4.4/32 removed");
3652     vec_free(r_paths);
3653
3654     /*
3655      * add-remove test. no change.
3656      */
3657     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3658              fib_path_list_db_size());
3659     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3660              fib_path_list_pool_size());
3661     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3662              fib_entry_pool_size());
3663
3664     /*
3665      * A route deag route
3666      */
3667     fib_table_entry_path_add(fib_index,
3668                              &pfx_4_4_4_4_s_32,
3669                              FIB_SOURCE_API,
3670                              FIB_ENTRY_FLAG_NONE,
3671                              DPO_PROTO_IP4,
3672                              &zero_addr,
3673                              ~0,
3674                              fib_index,
3675                              1,
3676                              NULL,
3677                              FIB_ROUTE_PATH_FLAG_NONE);
3678
3679     fei = fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32);
3680     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "4.4.4.4/32 present");
3681
3682     dpo = fib_entry_contribute_ip_forwarding(fei);
3683     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
3684     lookup_dpo_t *lkd = lookup_dpo_get(dpo->dpoi_index);
3685
3686     FIB_TEST((fib_index == lkd->lkd_fib_index),
3687              "4.4.4.4/32 is deag in %d %U",
3688              lkd->lkd_fib_index,
3689              format_dpo_id, dpo, 0);
3690     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
3691              "4.4.4.4/32 is source deag in %d %U",
3692              lkd->lkd_input,
3693              format_dpo_id, dpo, 0);
3694
3695     fib_table_entry_delete(fib_index,
3696                            &pfx_4_4_4_4_s_32,
3697                            FIB_SOURCE_API);
3698     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3699              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3700              "4.4.4.4/32 removed");
3701     vec_free(r_paths);
3702
3703     /*
3704      * A route deag route in a source lookup table
3705      */
3706     fib_table_entry_path_add(fib_index,
3707                              &pfx_4_4_4_4_s_32,
3708                              FIB_SOURCE_API,
3709                              FIB_ENTRY_FLAG_NONE,
3710                              DPO_PROTO_IP4,
3711                              &zero_addr,
3712                              ~0,
3713                              fib_index,
3714                              1,
3715                              NULL,
3716                              FIB_ROUTE_PATH_SOURCE_LOOKUP);
3717
3718     fei = fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32);
3719     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "4.4.4.4/32 present");
3720
3721     dpo = fib_entry_contribute_ip_forwarding(fei);
3722     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
3723     lkd = lookup_dpo_get(dpo->dpoi_index);
3724
3725     FIB_TEST((fib_index == lkd->lkd_fib_index),
3726              "4.4.4.4/32 is deag in %d %U",
3727              lkd->lkd_fib_index,
3728              format_dpo_id, dpo, 0);
3729     FIB_TEST((LOOKUP_INPUT_SRC_ADDR == lkd->lkd_input),
3730              "4.4.4.4/32 is source deag in %d %U",
3731              lkd->lkd_input,
3732              format_dpo_id, dpo, 0);
3733
3734     fib_table_entry_delete(fib_index,
3735                            &pfx_4_4_4_4_s_32,
3736                            FIB_SOURCE_API);
3737     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3738              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3739              "4.4.4.4/32 removed");
3740     vec_free(r_paths);
3741
3742     /*
3743      * add-remove test. no change.
3744      */
3745     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3746              fib_path_list_db_size());
3747     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3748              fib_path_list_pool_size());
3749     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3750              fib_entry_pool_size());
3751
3752     /*
3753      * Duplicate paths:
3754      *  add a recursive with duplicate paths. Expect the duplicate to be ignored.
3755      */
3756     fib_prefix_t pfx_34_1_1_1_s_32 = {
3757         .fp_len = 32,
3758         .fp_proto = FIB_PROTOCOL_IP4,
3759         .fp_addr = {
3760             .ip4.as_u32 = clib_host_to_net_u32(0x22010101),
3761         },
3762     };
3763     fib_prefix_t pfx_34_34_1_1_s_32 = {
3764         .fp_len = 32,
3765         .fp_proto = FIB_PROTOCOL_IP4,
3766         .fp_addr = {
3767             .ip4.as_u32 = clib_host_to_net_u32(0x22220101),
3768         },
3769     };
3770     fei = fib_table_entry_path_add(fib_index,
3771                                    &pfx_34_34_1_1_s_32,
3772                                    FIB_SOURCE_API,
3773                                    FIB_ENTRY_FLAG_NONE,
3774                                    DPO_PROTO_IP4,
3775                                    &nh_10_10_10_1,
3776                                    tm->hw[0]->sw_if_index,
3777                                    0,
3778                                    1,
3779                                    NULL,
3780                                    FIB_ROUTE_PATH_FLAG_NONE);
3781     fei = fib_table_entry_path_add(fib_index,
3782                                    &pfx_34_1_1_1_s_32,
3783                                    FIB_SOURCE_API,
3784                                    FIB_ENTRY_FLAG_NONE,
3785                                    DPO_PROTO_IP4,
3786                                    &pfx_34_34_1_1_s_32.fp_addr,
3787                                    ~0,
3788                                    fib_index,
3789                                    1,
3790                                    NULL,
3791                                    FIB_ROUTE_PATH_FLAG_NONE);
3792     fei = fib_table_entry_path_add(fib_index,
3793                                    &pfx_34_1_1_1_s_32,
3794                                    FIB_SOURCE_API,
3795                                    FIB_ENTRY_FLAG_NONE,
3796                                    DPO_PROTO_IP4,
3797                                    &pfx_34_34_1_1_s_32.fp_addr,
3798                                    ~0,
3799                                    fib_index,
3800                                    1,
3801                                    NULL,
3802                                    FIB_ROUTE_PATH_FLAG_NONE);
3803     FIB_TEST_REC_FORW(&pfx_34_1_1_1_s_32, &pfx_34_34_1_1_s_32, 0);
3804     fib_table_entry_delete_index(fei, FIB_SOURCE_API);
3805     fib_table_entry_delete(fib_index,
3806                            &pfx_34_34_1_1_s_32,
3807                            FIB_SOURCE_API);
3808
3809     /*
3810      * CLEANUP
3811      *   remove: 1.1.1.2/32, 1.1.2.0/24 and 1.1.1.1/32
3812      *           all of which are via 10.10.10.1, Itf1
3813      */
3814     fib_table_entry_path_remove(fib_index,
3815                                 &pfx_1_1_1_2_s_32,
3816                                 FIB_SOURCE_API,
3817                                 DPO_PROTO_IP4,
3818                                 &nh_10_10_10_1,
3819                                 tm->hw[0]->sw_if_index,
3820                                 ~0,
3821                                 1,
3822                                 FIB_ROUTE_PATH_FLAG_NONE);
3823     fib_table_entry_path_remove(fib_index,
3824                                 &pfx_1_1_1_1_s_32,
3825                                 FIB_SOURCE_API,
3826                                 DPO_PROTO_IP4,
3827                                 &nh_10_10_10_1,
3828                                 tm->hw[0]->sw_if_index,
3829                                 ~0,
3830                                 1,
3831                                 FIB_ROUTE_PATH_FLAG_NONE);
3832     fib_table_entry_path_remove(fib_index,
3833                                 &pfx_1_1_2_0_s_24,
3834                                 FIB_SOURCE_API,
3835                                 DPO_PROTO_IP4,
3836                                 &nh_10_10_10_1,
3837                                 tm->hw[0]->sw_if_index,
3838                                 ~0,
3839                                 1,
3840                                 FIB_ROUTE_PATH_FLAG_NONE);
3841
3842     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3843              fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_1_s_32),
3844              "1.1.1.1/32 removed");
3845     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3846              fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_2_s_32),
3847              "1.1.1.2/32 removed");
3848     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3849              fib_table_lookup_exact_match(fib_index, &pfx_1_1_2_0_s_24),
3850              "1.1.2.0/24 removed");
3851
3852     /*
3853      * -3 entries and -1 shared path-list
3854      */
3855     FIB_TEST((0  == fib_path_list_db_size()),   "path list DB population:%d",
3856              fib_path_list_db_size());
3857     FIB_TEST((PNBR+4 == fib_path_list_pool_size()), "path list pool size is %d",
3858              fib_path_list_pool_size());
3859     FIB_TEST((ENBR+4 == fib_entry_pool_size()), "entry pool size is %d",
3860              fib_entry_pool_size());
3861
3862     /*
3863      * An attached-host route. Expect to link to the incomplete adj
3864      */
3865     fib_prefix_t pfx_4_1_1_1_s_32 = {
3866         .fp_len = 32,
3867         .fp_proto = FIB_PROTOCOL_IP4,
3868         .fp_addr = {
3869             /* 4.1.1.1/32 */
3870             .ip4.as_u32 = clib_host_to_net_u32(0x04010101),
3871         },
3872     };
3873     fib_table_entry_path_add(fib_index,
3874                              &pfx_4_1_1_1_s_32,
3875                              FIB_SOURCE_API,
3876                              FIB_ENTRY_FLAG_NONE,
3877                              DPO_PROTO_IP4,
3878                              &zero_addr,
3879                              tm->hw[0]->sw_if_index,
3880                              fib_index,
3881                              1,
3882                              NULL,
3883                              FIB_ROUTE_PATH_FLAG_NONE);
3884
3885     fei = fib_table_lookup_exact_match(fib_index, &pfx_4_1_1_1_s_32);
3886     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "4.1.1.1/32 present");
3887     ai = fib_entry_get_adj(fei);
3888
3889     ai2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
3890                               VNET_LINK_IP4,
3891                               &pfx_4_1_1_1_s_32.fp_addr,
3892                               tm->hw[0]->sw_if_index);
3893     FIB_TEST((ai == ai2), "Attached-host link to incomplete ADJ");
3894     adj_unlock(ai2);
3895
3896     /*
3897      * +1 entry and +1 shared path-list
3898      */
3899     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3900              fib_path_list_db_size());
3901     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3902              fib_path_list_pool_size());
3903     FIB_TEST((ENBR+5 == fib_entry_pool_size()), "entry pool size is %d",
3904              fib_entry_pool_size());
3905
3906     fib_table_entry_delete(fib_index,
3907                            &pfx_4_1_1_1_s_32,
3908                            FIB_SOURCE_API);
3909
3910     FIB_TEST((0  == fib_path_list_db_size()),   "path list DB population:%d",
3911              fib_path_list_db_size());
3912     FIB_TEST((PNBR+4 == fib_path_list_pool_size()), "path list pool size is %d",
3913              fib_path_list_pool_size());
3914     FIB_TEST((ENBR+4 == fib_entry_pool_size()), "entry pool size is %d",
3915              fib_entry_pool_size());
3916
3917     /*
3918      * add a v6 prefix via v4 next-hops
3919      */
3920     fib_prefix_t pfx_2001_s_64 = {
3921         .fp_len = 64,
3922         .fp_proto = FIB_PROTOCOL_IP6,
3923         .fp_addr = {
3924             .ip6.as_u64[0] = clib_host_to_net_u64(0x2001000000000000),
3925         },
3926     };
3927     fei = fib_table_entry_path_add(0, //default v6 table
3928                                    &pfx_2001_s_64,
3929                                    FIB_SOURCE_API,
3930                                    FIB_ENTRY_FLAG_NONE,
3931                                    DPO_PROTO_IP4,
3932                                    &nh_10_10_10_1,
3933                                    tm->hw[0]->sw_if_index,
3934                                    fib_index,
3935                                    1,
3936                                    NULL,
3937                                    FIB_ROUTE_PATH_FLAG_NONE);
3938
3939     fei = fib_table_lookup_exact_match(0, &pfx_2001_s_64);
3940     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "2001::/64 present");
3941     ai = fib_entry_get_adj(fei);
3942     adj = adj_get(ai);
3943     FIB_TEST((adj->lookup_next_index == IP_LOOKUP_NEXT_ARP),
3944              "2001::/64 via ARP-adj");
3945     FIB_TEST((adj->ia_link == VNET_LINK_IP6),
3946              "2001::/64 is link type v6");
3947     FIB_TEST((adj->ia_nh_proto == FIB_PROTOCOL_IP4),
3948              "2001::/64 ADJ-adj is NH proto v4");
3949     fib_table_entry_delete(0, &pfx_2001_s_64, FIB_SOURCE_API);
3950
3951     /*
3952      * add a uRPF exempt prefix:
3953      *  test:
3954      *   - it's forwarding is drop
3955      *   - it's uRPF list is not empty
3956      *   - the uRPF list for the default route (it's cover) is empty
3957      */
3958     fei = fib_table_entry_special_add(fib_index,
3959                                       &pfx_4_1_1_1_s_32,
3960                                       FIB_SOURCE_URPF_EXEMPT,
3961                                       FIB_ENTRY_FLAG_DROP);
3962     dpo = fib_entry_contribute_ip_forwarding(fei);
3963     FIB_TEST(load_balance_is_drop(dpo),
3964              "uRPF exempt 4.1.1.1/32 DROP");
3965     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1, 0),
3966              "uRPF list for exempt prefix has itf index 0");
3967     fei = fib_table_lookup_exact_match(fib_index, &pfx_0_0_0_0_s_0);
3968     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 0),
3969              "uRPF list for 0.0.0.0/0 empty");
3970
3971     fib_table_entry_delete(fib_index, &pfx_4_1_1_1_s_32, FIB_SOURCE_URPF_EXEMPT);
3972
3973     /*
3974      * An adj-fib that fails the refinement criteria - no connected cover
3975      */
3976     fib_prefix_t pfx_12_10_10_2_s_32 = {
3977         .fp_len = 32,
3978         .fp_proto = FIB_PROTOCOL_IP4,
3979         .fp_addr = {
3980             /* 12.10.10.2 */
3981             .ip4.as_u32 = clib_host_to_net_u32(0x0c0a0a02),
3982         },
3983     };
3984
3985     fib_table_entry_path_add(fib_index,
3986                              &pfx_12_10_10_2_s_32,
3987                              FIB_SOURCE_ADJ,
3988                              FIB_ENTRY_FLAG_ATTACHED,
3989                              DPO_PROTO_IP4,
3990                              &pfx_12_10_10_2_s_32.fp_addr,
3991                              tm->hw[0]->sw_if_index,
3992                              ~0, // invalid fib index
3993                              1,
3994                              NULL,
3995                              FIB_ROUTE_PATH_FLAG_NONE);
3996
3997     fei = fib_table_lookup_exact_match(fib_index, &pfx_12_10_10_2_s_32);
3998     dpo = fib_entry_contribute_ip_forwarding(fei);
3999     FIB_TEST(dpo_is_drop(dpo),
4000              "no connected cover adj-fib fails refinement: %U",
4001              format_dpo_id, dpo, 0);
4002
4003     fib_table_entry_delete(fib_index,
4004                            &pfx_12_10_10_2_s_32,
4005                            FIB_SOURCE_ADJ);
4006
4007     /*
4008      * An adj-fib that fails the refinement criteria - cover is connected
4009      * but on a different interface
4010      */
4011     fib_prefix_t pfx_10_10_10_127_s_32 = {
4012         .fp_len = 32,
4013         .fp_proto = FIB_PROTOCOL_IP4,
4014         .fp_addr = {
4015             /* 10.10.10.127 */
4016             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a7f),
4017         },
4018     };
4019
4020     fib_table_entry_path_add(fib_index,
4021                              &pfx_10_10_10_127_s_32,
4022                              FIB_SOURCE_ADJ,
4023                              FIB_ENTRY_FLAG_ATTACHED,
4024                              DPO_PROTO_IP4,
4025                              &pfx_10_10_10_127_s_32.fp_addr,
4026                              tm->hw[1]->sw_if_index,
4027                              ~0, // invalid fib index
4028                              1,
4029                              NULL,
4030                              FIB_ROUTE_PATH_FLAG_NONE);
4031
4032     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_127_s_32);
4033     dpo = fib_entry_contribute_ip_forwarding(fei);
4034     FIB_TEST(dpo_is_drop(dpo),
4035              "wrong interface adj-fib fails refinement");
4036
4037     fib_table_entry_delete(fib_index,
4038                            &pfx_10_10_10_127_s_32,
4039                            FIB_SOURCE_ADJ);
4040
4041     /*
4042      * add a second path to an adj-fib
4043      * this is a sumiluation of another ARP entry created
4044      * on an interface on which the connected prefix does not exist.
4045      * The second path fails refinement. Expect to forward through the
4046      * first.
4047      */
4048     fib_prefix_t pfx_10_10_10_3_s_32 = {
4049         .fp_len = 32,
4050         .fp_proto = FIB_PROTOCOL_IP4,
4051         .fp_addr = {
4052             /* 10.10.10.3 */
4053             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a03),
4054         },
4055     };
4056
4057     ai_03 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
4058                                 VNET_LINK_IP4,
4059                                 &nh_10_10_10_3,
4060                                 tm->hw[0]->sw_if_index);
4061
4062     fib_test_lb_bucket_t ip_o_10_10_10_3 = {
4063         .type = FT_LB_ADJ,
4064         .adj = {
4065             .adj = ai_03,
4066         },
4067     };
4068     fei = fib_table_entry_path_add(fib_index,
4069                                    &pfx_10_10_10_3_s_32,
4070                                    FIB_SOURCE_ADJ,
4071                                    FIB_ENTRY_FLAG_NONE,
4072                                    DPO_PROTO_IP4,
4073                                    &nh_10_10_10_3,
4074                                    tm->hw[0]->sw_if_index,
4075                                    fib_index,
4076                                    1,
4077                                    NULL,
4078                                    FIB_ROUTE_PATH_FLAG_NONE);
4079     fei = fib_table_entry_path_add(fib_index,
4080                                    &pfx_10_10_10_3_s_32,
4081                                    FIB_SOURCE_ADJ,
4082                                    FIB_ENTRY_FLAG_NONE,
4083                                    DPO_PROTO_IP4,
4084                                    &nh_12_12_12_12,
4085                                    tm->hw[1]->sw_if_index,
4086                                    fib_index,
4087                                    1,
4088                                    NULL,
4089                                    FIB_ROUTE_PATH_FLAG_NONE);
4090     FIB_TEST(!fib_test_validate_entry(fei,
4091                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4092                                       1,
4093                                       &ip_o_10_10_10_3),
4094              "10.10.10.3 via 10.10.10.3/Eth0 only");
4095
4096     /*
4097      * remove the path that refines the cover, should go unresolved
4098      */
4099     fib_table_entry_path_remove(fib_index,
4100                                 &pfx_10_10_10_3_s_32,
4101                                 FIB_SOURCE_ADJ,
4102                                 DPO_PROTO_IP4,
4103                                 &nh_10_10_10_3,
4104                                 tm->hw[0]->sw_if_index,
4105                                 fib_index,
4106                                 1,
4107                                 FIB_ROUTE_PATH_FLAG_NONE);
4108     dpo = fib_entry_contribute_ip_forwarding(fei);
4109     FIB_TEST(dpo_is_drop(dpo),
4110              "wrong interface adj-fib fails refinement");
4111
4112     /*
4113      * add back the path that refines the cover
4114      */
4115     fei = fib_table_entry_path_add(fib_index,
4116                                    &pfx_10_10_10_3_s_32,
4117                                    FIB_SOURCE_ADJ,
4118                                    FIB_ENTRY_FLAG_NONE,
4119                                    DPO_PROTO_IP4,
4120                                    &nh_10_10_10_3,
4121                                    tm->hw[0]->sw_if_index,
4122                                    fib_index,
4123                                    1,
4124                                    NULL,
4125                                    FIB_ROUTE_PATH_FLAG_NONE);
4126     FIB_TEST(!fib_test_validate_entry(fei,
4127                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4128                                       1,
4129                                       &ip_o_10_10_10_3),
4130              "10.10.10.3 via 10.10.10.3/Eth0 only");
4131
4132     /*
4133      * remove the path that does not refine the cover
4134      */
4135     fib_table_entry_path_remove(fib_index,
4136                                 &pfx_10_10_10_3_s_32,
4137                                 FIB_SOURCE_ADJ,
4138                                 DPO_PROTO_IP4,
4139                                 &nh_12_12_12_12,
4140                                 tm->hw[1]->sw_if_index,
4141                                 fib_index,
4142                                 1,
4143                                 FIB_ROUTE_PATH_FLAG_NONE);
4144     FIB_TEST(!fib_test_validate_entry(fei,
4145                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4146                                       1,
4147                                       &ip_o_10_10_10_3),
4148              "10.10.10.3 via 10.10.10.3/Eth0 only");
4149
4150     /*
4151      * remove the path that does refine, it's the last path, so
4152      * the entry should be gone
4153      */
4154     fib_table_entry_path_remove(fib_index,
4155                                 &pfx_10_10_10_3_s_32,
4156                                 FIB_SOURCE_ADJ,
4157                                 DPO_PROTO_IP4,
4158                                 &nh_10_10_10_3,
4159                                 tm->hw[0]->sw_if_index,
4160                                 fib_index,
4161                                 1,
4162                                 FIB_ROUTE_PATH_FLAG_NONE);
4163     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3_s_32);
4164     FIB_TEST((fei == FIB_NODE_INDEX_INVALID), "10.10.10.3 gone");
4165
4166     adj_unlock(ai_03);
4167
4168     /*
4169      * change the table's flow-hash config - expect the update to propagete to
4170      * the entries' load-balance objects
4171      */
4172     flow_hash_config_t old_hash_config, new_hash_config;
4173
4174     old_hash_config = fib_table_get_flow_hash_config(fib_index,
4175                                                      FIB_PROTOCOL_IP4);
4176     new_hash_config = (IP_FLOW_HASH_SRC_ADDR |
4177                        IP_FLOW_HASH_DST_ADDR);
4178
4179     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
4180     dpo = fib_entry_contribute_ip_forwarding(fei);
4181     lb = load_balance_get(dpo->dpoi_index);
4182     FIB_TEST((lb->lb_hash_config == old_hash_config),
4183              "Table and LB hash config match: %U",
4184              format_ip_flow_hash_config, lb->lb_hash_config);
4185
4186     fib_table_set_flow_hash_config(fib_index, FIB_PROTOCOL_IP4, new_hash_config);
4187
4188     FIB_TEST((lb->lb_hash_config == new_hash_config),
4189              "Table and LB newhash config match: %U",
4190              format_ip_flow_hash_config, lb->lb_hash_config);
4191
4192     /*
4193      * A route via DVR DPO
4194      */
4195     fei = fib_table_entry_path_add(fib_index,
4196                                    &pfx_10_10_10_3_s_32,
4197                                    FIB_SOURCE_API,
4198                                    FIB_ENTRY_FLAG_NONE,
4199                                    DPO_PROTO_IP4,
4200                                    &zero_addr,
4201                                    tm->hw[0]->sw_if_index,
4202                                    ~0,
4203                                    1,
4204                                    NULL,
4205                                    FIB_ROUTE_PATH_DVR);
4206     dpo_id_t dvr_dpo = DPO_INVALID;
4207     dvr_dpo_add_or_lock(tm->hw[0]->sw_if_index, DPO_PROTO_IP4, &dvr_dpo);
4208     fib_test_lb_bucket_t ip_o_l2 = {
4209         .type = FT_LB_L2,
4210         .adj = {
4211             .adj = dvr_dpo.dpoi_index,
4212         },
4213     };
4214
4215     FIB_TEST(!fib_test_validate_entry(fei,
4216                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4217                                       1,
4218                                       &ip_o_l2),
4219              "10.10.10.3 via L2 on Eth0");
4220     fib_table_entry_path_remove(fib_index,
4221                                 &pfx_10_10_10_3_s_32,
4222                                 FIB_SOURCE_API,
4223                                 DPO_PROTO_IP4,
4224                                 &zero_addr,
4225                                 tm->hw[0]->sw_if_index,
4226                                 fib_index,
4227                                 1,
4228                                 FIB_ROUTE_PATH_DVR);
4229     dpo_reset(&dvr_dpo);
4230
4231     /*
4232      * add the default route via a next-hop that will form a loop
4233      */
4234     fib_prefix_t pfx_conn = {
4235         .fp_len = 24,
4236         .fp_proto = FIB_PROTOCOL_IP4,
4237         .fp_addr = {
4238             /* 30.30.30.30 */
4239             .ip4.as_u32 = clib_host_to_net_u32(0x1e1e1e1e),
4240         },
4241     };
4242
4243     dfrt = fib_table_entry_path_add(fib_index,
4244                                     &pfx_0_0_0_0_s_0,
4245                                     FIB_SOURCE_API,
4246                                     FIB_ENTRY_FLAG_NONE,
4247                                     DPO_PROTO_IP4,
4248                                     &pfx_conn.fp_addr,
4249                                     ~0,
4250                                     fib_index,
4251                                     1,
4252                                     NULL,
4253                                     FIB_ROUTE_PATH_FLAG_NONE);
4254     /*
4255      * the default route is a drop, since it's looped
4256      */
4257     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(dfrt)),
4258              "Default route is DROP");
4259
4260     /*
4261      * add a connected cover for the next-hop, this breaks the recursion loop
4262      * for the default route
4263      */
4264     fib_table_entry_path_add(fib_index,
4265                              &pfx_conn,
4266                              FIB_SOURCE_API,
4267                              (FIB_ENTRY_FLAG_CONNECTED |
4268                               FIB_ENTRY_FLAG_ATTACHED),
4269                              DPO_PROTO_IP4,
4270                              NULL,
4271                              tm->hw[0]->sw_if_index,
4272                              ~0,
4273                              1,
4274                              NULL,
4275                              FIB_ROUTE_PATH_FLAG_NONE);
4276     pfx_conn.fp_len = 32;
4277     fei = fib_table_lookup_exact_match(fib_index, &pfx_conn);
4278
4279     u32 ai_30 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
4280                                     VNET_LINK_IP4,
4281                                     &pfx_conn.fp_addr,
4282                                     tm->hw[0]->sw_if_index);
4283
4284     fib_test_lb_bucket_t ip_o_30_30_30_30 = {
4285         .type = FT_LB_ADJ,
4286         .adj = {
4287             .adj = ai_30,
4288         },
4289     };
4290     FIB_TEST(!fib_test_validate_entry(fei,
4291                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4292                                       1,
4293                                       &ip_o_30_30_30_30),
4294              "30.30.30.30 via adj");
4295     FIB_TEST_REC_FORW(&pfx_0_0_0_0_s_0, &pfx_conn, 0);
4296
4297     pfx_conn.fp_len = 24;
4298     fib_table_entry_delete(fib_index,
4299                            &pfx_conn,
4300                            FIB_SOURCE_API);
4301     fib_table_entry_delete(fib_index,
4302                            &pfx_0_0_0_0_s_0,
4303                            FIB_SOURCE_API);
4304     adj_unlock(ai_30);
4305
4306     /*
4307      * CLEANUP
4308      *    remove adj-fibs:
4309      */
4310     fib_table_entry_delete(fib_index,
4311                            &pfx_10_10_10_1_s_32,
4312                            FIB_SOURCE_ADJ);
4313     fib_table_entry_delete(fib_index,
4314                            &pfx_10_10_10_2_s_32,
4315                            FIB_SOURCE_ADJ);
4316     FIB_TEST(FIB_NODE_INDEX_INVALID ==
4317              fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32),
4318              "10.10.10.1/32 adj-fib removed");
4319     FIB_TEST(FIB_NODE_INDEX_INVALID ==
4320              fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_2_s_32),
4321              "10.10.10.2/32 adj-fib removed");
4322
4323     /*
4324      * -2 entries and -2 non-shared path-list
4325      */
4326     FIB_TEST((0  == fib_path_list_db_size()),   "path list DB population:%d",
4327              fib_path_list_db_size());
4328     FIB_TEST((PNBR+2 == fib_path_list_pool_size()), "path list pool size is %d",
4329              fib_path_list_pool_size());
4330     FIB_TEST((ENBR+2 == fib_entry_pool_size()), "entry pool size is %d",
4331              fib_entry_pool_size());
4332
4333     /*
4334      * unlock the adjacencies for which this test provided a rewrite.
4335      * These are the last locks on these adjs. they should thus go away.
4336      */
4337     adj_unlock(ai_02);
4338     adj_unlock(ai_01);
4339     adj_unlock(ai_12_12_12_12);
4340
4341     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
4342              adj_nbr_db_size());
4343
4344     /*
4345      * CLEANUP
4346      *   remove the interface prefixes
4347      */
4348     local_pfx.fp_len = 32;
4349     fib_table_entry_special_remove(fib_index, &local_pfx,
4350                                    FIB_SOURCE_INTERFACE);
4351     fei = fib_table_lookup(fib_index, &local_pfx);
4352
4353     FIB_TEST(FIB_NODE_INDEX_INVALID ==
4354              fib_table_lookup_exact_match(fib_index, &local_pfx),
4355              "10.10.10.10/32 adj-fib removed");
4356
4357     local_pfx.fp_len = 24;
4358     fib_table_entry_delete(fib_index, &local_pfx,
4359                            FIB_SOURCE_INTERFACE);
4360
4361     FIB_TEST(FIB_NODE_INDEX_INVALID ==
4362              fib_table_lookup_exact_match(fib_index, &local_pfx),
4363              "10.10.10.10/24 adj-fib removed");
4364
4365     /*
4366      * -2 entries and -2 non-shared path-list
4367      */
4368     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
4369              fib_path_list_db_size());
4370     FIB_TEST((PNBR == fib_path_list_pool_size()), "path list pool size is %d",
4371              fib_path_list_pool_size());
4372     FIB_TEST((ENBR == fib_entry_pool_size()), "entry pool size is %d",
4373              fib_entry_pool_size());
4374
4375     /*
4376      * Last but not least, remove the VRF
4377      */
4378     FIB_TEST((0 == fib_table_get_num_entries(fib_index,
4379                                              FIB_PROTOCOL_IP4,
4380                                              FIB_SOURCE_API)),
4381              "NO API Source'd prefixes");
4382     FIB_TEST((0 == fib_table_get_num_entries(fib_index,
4383                                              FIB_PROTOCOL_IP4,
4384                                              FIB_SOURCE_RR)),
4385              "NO RR Source'd prefixes");
4386     FIB_TEST((0 == fib_table_get_num_entries(fib_index,
4387                                              FIB_PROTOCOL_IP4,
4388                                              FIB_SOURCE_INTERFACE)),
4389              "NO INterface Source'd prefixes");
4390
4391     for (ii = 0; ii < 4; ii++)
4392       fib_table_bind (FIB_PROTOCOL_IP4, tm->hw[ii]->sw_if_index, 0);
4393
4394     fib_table_unlock(fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_API);
4395
4396     FIB_TEST((0  == fib_path_list_db_size()), "path list DB population:%d",
4397              fib_path_list_db_size());
4398     FIB_TEST((PNBR-5 == fib_path_list_pool_size()), "path list pool size is %d",
4399              fib_path_list_pool_size());
4400     FIB_TEST((ENBR-5 == fib_entry_pool_size()), "entry pool size is %d",
4401              fib_entry_pool_size());
4402     FIB_TEST((ENBR-5 == pool_elts(fib_urpf_list_pool)), "uRPF pool size is %d",
4403              pool_elts(fib_urpf_list_pool));
4404     FIB_TEST((0 == pool_elts(load_balance_map_pool)), "LB-map pool size is %d",
4405              pool_elts(load_balance_map_pool));
4406     FIB_TEST((lb_count == pool_elts(load_balance_pool)), "LB pool size is %d",
4407              pool_elts(load_balance_pool));
4408     FIB_TEST((0 == pool_elts(dvr_dpo_pool)), "L2 DPO pool size is %d",
4409              pool_elts(dvr_dpo_pool));
4410
4411     return (res);
4412 }
4413
4414 static int
4415 fib_test_v6 (void)
4416 {
4417     /*
4418      * In the default table check for the presence and correct forwarding
4419      * of the special entries
4420      */
4421     fib_node_index_t dfrt, fei, ai, locked_ai, ai_01, ai_02;
4422     const dpo_id_t *dpo, *dpo_drop;
4423     const ip_adjacency_t *adj;
4424     const receive_dpo_t *rd;
4425     test_main_t *tm;
4426     u32 fib_index;
4427     int ii, res;
4428
4429     res = 0;
4430     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
4431              adj_nbr_db_size());
4432
4433     /* via 2001:0:0:1::2 */
4434     ip46_address_t nh_2001_2 = {
4435         .ip6 = {
4436             .as_u64 = {
4437                 [0] = clib_host_to_net_u64(0x2001000000000001),
4438                 [1] = clib_host_to_net_u64(0x0000000000000002),
4439             },
4440         },
4441     };
4442
4443     tm = &test_main;
4444
4445     dpo_drop = drop_dpo_get(DPO_PROTO_IP6);
4446
4447     /* Find or create FIB table 11 */
4448     fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP6, 11,
4449                                                   FIB_SOURCE_API);
4450
4451     for (ii = 0; ii < 4; ii++)
4452       fib_table_bind (FIB_PROTOCOL_IP6, tm->hw[ii]->sw_if_index, fib_index);
4453
4454     fib_prefix_t pfx_0_0 = {
4455         .fp_len = 0,
4456         .fp_proto = FIB_PROTOCOL_IP6,
4457         .fp_addr = {
4458             .ip6 = {
4459                 {0, 0},
4460             },
4461         },
4462     };
4463
4464     dfrt = fib_table_lookup(fib_index, &pfx_0_0);
4465     FIB_TEST((FIB_NODE_INDEX_INVALID != dfrt), "default route present");
4466     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(dfrt)),
4467              "Default route is DROP");
4468
4469     dpo = fib_entry_contribute_ip_forwarding(dfrt);
4470     FIB_TEST((dpo->dpoi_index == ip6_fib_table_fwding_lookup(
4471                   1,
4472                   &pfx_0_0.fp_addr.ip6)),
4473              "default-route; fwd and non-fwd tables match");
4474
4475     // FIXME - check specials.
4476
4477     /*
4478      * At this stage there is one v4 FIB with 5 routes and two v6 FIBs
4479      * each with 2 entries and a v6 mfib with 4 path-lists and v4 mfib with 2.
4480      * All entries are special so no path-list sharing.
4481      */
4482 #define ENPS (5+4)
4483     u32 PNPS = (5+4+4+2);
4484     /*
4485      * if the IGMP plugin is loaded this adds two more entries to the v4 MFIB
4486      */
4487     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
4488     FIB_TEST((PNPS == fib_path_list_pool_size()), "path list pool size is %d",
4489              fib_path_list_pool_size());
4490     FIB_TEST((ENPS == fib_entry_pool_size()), "entry pool size is %d",
4491              fib_entry_pool_size());
4492
4493     /*
4494      * add interface routes.
4495      *  validate presence of /64 attached and /128 recieve.
4496      *  test for the presence of the receive address in the glean and local adj
4497      *
4498      * receive on 2001:0:0:1::1/128
4499      */
4500     fib_prefix_t local_pfx = {
4501         .fp_len = 64,
4502         .fp_proto = FIB_PROTOCOL_IP6,
4503         .fp_addr = {
4504             .ip6 = {
4505                 .as_u64 = {
4506                     [0] = clib_host_to_net_u64(0x2001000000000001),
4507                     [1] = clib_host_to_net_u64(0x0000000000000001),
4508                 },
4509             },
4510         }
4511     };
4512
4513     fib_table_entry_update_one_path(fib_index, &local_pfx,
4514                                     FIB_SOURCE_INTERFACE,
4515                                     (FIB_ENTRY_FLAG_CONNECTED |
4516                                      FIB_ENTRY_FLAG_ATTACHED),
4517                                     DPO_PROTO_IP6,
4518                                     NULL,
4519                                     tm->hw[0]->sw_if_index,
4520                                     ~0,
4521                                     1,
4522                                     NULL,
4523                                     FIB_ROUTE_PATH_FLAG_NONE);
4524     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
4525
4526     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached interface route present");
4527
4528     ai = fib_entry_get_adj(fei);
4529     FIB_TEST((FIB_NODE_INDEX_INVALID != ai), "attached interface route adj present");
4530     adj = adj_get(ai);
4531     FIB_TEST((IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index),
4532              "attached interface adj is glean");
4533     dpo = fib_entry_contribute_ip_forwarding(fei);
4534     FIB_TEST((dpo->dpoi_index == ip6_fib_table_fwding_lookup(
4535                   1,
4536                   &local_pfx.fp_addr.ip6)),
4537              "attached-route; fwd and non-fwd tables match");
4538
4539     local_pfx.fp_len = 128;
4540     fib_table_entry_update_one_path(fib_index, &local_pfx,
4541                                     FIB_SOURCE_INTERFACE,
4542                                     (FIB_ENTRY_FLAG_CONNECTED |
4543                                      FIB_ENTRY_FLAG_LOCAL),
4544                                     DPO_PROTO_IP6,
4545                                     NULL,
4546                                     tm->hw[0]->sw_if_index,
4547                                     ~0, // invalid fib index
4548                                     1,
4549                                     NULL,
4550                                     FIB_ROUTE_PATH_FLAG_NONE);
4551     fei = fib_table_lookup(fib_index, &local_pfx);
4552
4553     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local interface route present");
4554
4555     dpo = fib_entry_contribute_ip_forwarding(fei);
4556     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
4557     FIB_TEST((DPO_RECEIVE == dpo->dpoi_type),
4558              "local interface adj is local");
4559     rd = receive_dpo_get(dpo->dpoi_index);
4560
4561     FIB_TEST((0 == ip46_address_cmp(&local_pfx.fp_addr,
4562                                     &rd->rd_addr)),
4563              "local interface adj is receive ok");
4564
4565     dpo = fib_entry_contribute_ip_forwarding(fei);
4566     FIB_TEST((dpo->dpoi_index == ip6_fib_table_fwding_lookup(
4567                   1,
4568                   &local_pfx.fp_addr.ip6)),
4569              "local-route; fwd and non-fwd tables match");
4570     FIB_TEST((0 == ip46_address_cmp(&local_pfx.fp_addr,
4571                                     &adj->sub_type.glean.rx_pfx.fp_addr)),
4572              "attached interface adj is receive ok");
4573
4574     /*
4575      * +2 entries. +2 unshared path-lists
4576      */
4577     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
4578     FIB_TEST((PNPS+2 == fib_path_list_pool_size()), "path list pool size is%d",
4579              fib_path_list_pool_size());
4580     FIB_TEST((ENPS+2 == fib_entry_pool_size()), "entry pool size is %d",
4581              fib_entry_pool_size());
4582
4583     /*
4584      * Modify the default route to be via an adj not yet known.
4585      * this sources the defalut route with the API source, which is
4586      * a higher preference to the DEFAULT_ROUTE source
4587      */
4588     fib_table_entry_path_add(fib_index, &pfx_0_0,
4589                              FIB_SOURCE_API,
4590                              FIB_ENTRY_FLAG_NONE,
4591                              DPO_PROTO_IP6,
4592                              &nh_2001_2,
4593                              tm->hw[0]->sw_if_index,
4594                              ~0,
4595                              1,
4596                              NULL,
4597                              FIB_ROUTE_PATH_FLAG_NONE);
4598     fei = fib_table_lookup(fib_index, &pfx_0_0);
4599
4600     FIB_TEST((fei == dfrt), "default route same index");
4601     ai = fib_entry_get_adj(fei);
4602     FIB_TEST((FIB_NODE_INDEX_INVALID != ai), "default route adj present");
4603     adj = adj_get(ai);
4604     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
4605              "adj is incomplete");
4606     FIB_TEST((0 == ip46_address_cmp(&nh_2001_2, &adj->sub_type.nbr.next_hop)),
4607              "adj nbr next-hop ok");
4608
4609     /*
4610      * find the adj in the shared db
4611      */
4612     locked_ai = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
4613                                     VNET_LINK_IP6,
4614                                     &nh_2001_2,
4615                                     tm->hw[0]->sw_if_index);
4616     FIB_TEST((locked_ai == ai), "ADJ NBR DB find");
4617     adj_unlock(locked_ai);
4618
4619     /*
4620      * no more entries. +1 shared path-list
4621      */
4622     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
4623              fib_path_list_db_size());
4624     FIB_TEST((PNPS+3 == fib_path_list_pool_size()), "path list pool size is%d",
4625              fib_path_list_pool_size());
4626     FIB_TEST((ENPS+2 == fib_entry_pool_size()), "entry pool size is %d",
4627              fib_entry_pool_size());
4628
4629     /*
4630      * remove the API source from the default route. We expected
4631      * the route to remain, sourced by DEFAULT_ROUTE, and hence a DROP
4632      */
4633     fib_table_entry_path_remove(fib_index, &pfx_0_0,
4634                                 FIB_SOURCE_API,
4635                                 DPO_PROTO_IP6,
4636                                 &nh_2001_2,
4637                                 tm->hw[0]->sw_if_index,
4638                                 ~0,
4639                                 1,
4640                                 FIB_ROUTE_PATH_FLAG_NONE);
4641     fei = fib_table_lookup(fib_index, &pfx_0_0);
4642
4643     FIB_TEST((fei == dfrt), "default route same index");
4644     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(dfrt)),
4645              "Default route is DROP");
4646
4647     /*
4648      * no more entries. -1 shared path-list
4649      */
4650     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
4651              fib_path_list_db_size());
4652     FIB_TEST((PNPS+2 == fib_path_list_pool_size()), "path list pool size is%d",
4653              fib_path_list_pool_size());
4654     FIB_TEST((ENPS+2 == fib_entry_pool_size()), "entry pool size is %d",
4655              fib_entry_pool_size());
4656
4657     /*
4658      * Add an 2 ARP entry => a complete ADJ plus adj-fib.
4659      */
4660     fib_prefix_t pfx_2001_1_2_s_128 = {
4661         .fp_len   = 128,
4662         .fp_proto = FIB_PROTOCOL_IP6,
4663         .fp_addr  = {
4664             .ip6 = {
4665                 .as_u64 = {
4666                     [0] = clib_host_to_net_u64(0x2001000000000001),
4667                     [1] = clib_host_to_net_u64(0x0000000000000002),
4668                 },
4669             },
4670         }
4671     };
4672     fib_prefix_t pfx_2001_1_3_s_128 = {
4673         .fp_len   = 128,
4674         .fp_proto = FIB_PROTOCOL_IP6,
4675         .fp_addr  = {
4676             .ip6 = {
4677                 .as_u64 = {
4678                     [0] = clib_host_to_net_u64(0x2001000000000001),
4679                     [1] = clib_host_to_net_u64(0x0000000000000003),
4680                 },
4681             },
4682         }
4683     };
4684     u8 eth_addr[] = {
4685         0xde, 0xde, 0xde, 0xba, 0xba, 0xba,
4686     };
4687
4688     ai_01 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
4689                                 VNET_LINK_IP6,
4690                                 &pfx_2001_1_2_s_128.fp_addr,
4691                                 tm->hw[0]->sw_if_index);
4692     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_01), "adj created");
4693     adj = adj_get(ai_01);
4694     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
4695              "adj is incomplete");
4696     FIB_TEST((0 == ip46_address_cmp(&pfx_2001_1_2_s_128.fp_addr,
4697                                     &adj->sub_type.nbr.next_hop)),
4698              "adj nbr next-hop ok");
4699
4700     adj_nbr_update_rewrite(ai_01, ADJ_NBR_REWRITE_FLAG_COMPLETE,
4701                            fib_test_build_rewrite(eth_addr));
4702     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
4703              "adj is complete");
4704     FIB_TEST((0 == ip46_address_cmp(&pfx_2001_1_2_s_128.fp_addr,
4705                                     &adj->sub_type.nbr.next_hop)),
4706              "adj nbr next-hop ok");
4707
4708     fib_table_entry_path_add(fib_index,
4709                              &pfx_2001_1_2_s_128,
4710                              FIB_SOURCE_ADJ,
4711                              FIB_ENTRY_FLAG_ATTACHED,
4712                              DPO_PROTO_IP6,
4713                              &pfx_2001_1_2_s_128.fp_addr,
4714                              tm->hw[0]->sw_if_index,
4715                              ~0,
4716                              1,
4717                              NULL,
4718                              FIB_ROUTE_PATH_FLAG_NONE);
4719
4720     fei = fib_table_lookup(fib_index, &pfx_2001_1_2_s_128);
4721     ai = fib_entry_get_adj(fei);
4722     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj");
4723
4724     eth_addr[5] = 0xb2;
4725
4726     ai_02 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
4727                                 VNET_LINK_IP6,
4728                                 &pfx_2001_1_3_s_128.fp_addr,
4729                                 tm->hw[0]->sw_if_index);
4730     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_02), "adj created");
4731     adj = adj_get(ai_02);
4732     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
4733              "adj is incomplete");
4734     FIB_TEST((0 == ip46_address_cmp(&pfx_2001_1_3_s_128.fp_addr,
4735                                     &adj->sub_type.nbr.next_hop)),
4736              "adj nbr next-hop ok");
4737
4738     adj_nbr_update_rewrite(ai_02, ADJ_NBR_REWRITE_FLAG_COMPLETE,
4739                            fib_test_build_rewrite(eth_addr));
4740     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
4741              "adj is complete");
4742     FIB_TEST((0 == ip46_address_cmp(&pfx_2001_1_3_s_128.fp_addr,
4743                                     &adj->sub_type.nbr.next_hop)),
4744              "adj nbr next-hop ok");
4745     FIB_TEST((ai_01 != ai_02), "ADJs are different");
4746
4747     fib_table_entry_path_add(fib_index,
4748                              &pfx_2001_1_3_s_128,
4749                              FIB_SOURCE_ADJ,
4750                              FIB_ENTRY_FLAG_ATTACHED,
4751                              DPO_PROTO_IP6,
4752                              &pfx_2001_1_3_s_128.fp_addr,
4753                              tm->hw[0]->sw_if_index,
4754                              ~0,
4755                              1,
4756                              NULL,
4757                              FIB_ROUTE_PATH_FLAG_NONE);
4758
4759     fei = fib_table_lookup(fib_index, &pfx_2001_1_3_s_128);
4760     ai = fib_entry_get_adj(fei);
4761     FIB_TEST((ai_02 == ai), "ADJ-FIB resolves via adj");
4762
4763     /*
4764      * +2 entries, +2 unshread path-lists.
4765      */
4766     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
4767              fib_path_list_db_size());
4768     FIB_TEST((PNPS+4 == fib_path_list_pool_size()), "path list pool size is%d",
4769              fib_path_list_pool_size());
4770     FIB_TEST((ENPS+4 == fib_entry_pool_size()), "entry pool size is %d",
4771              fib_entry_pool_size());
4772
4773     /*
4774      * Add a 2 routes via the first ADJ. ensure path-list sharing
4775      */
4776     fib_prefix_t pfx_2001_a_s_64 = {
4777         .fp_len   = 64,
4778         .fp_proto = FIB_PROTOCOL_IP6,
4779         .fp_addr  = {
4780             .ip6 = {
4781                 .as_u64 = {
4782                     [0] = clib_host_to_net_u64(0x200100000000000a),
4783                     [1] = clib_host_to_net_u64(0x0000000000000000),
4784                 },
4785             },
4786         }
4787     };
4788     fib_prefix_t pfx_2001_b_s_64 = {
4789         .fp_len   = 64,
4790         .fp_proto = FIB_PROTOCOL_IP6,
4791         .fp_addr  = {
4792             .ip6 = {
4793                 .as_u64 = {
4794                     [0] = clib_host_to_net_u64(0x200100000000000b),
4795                     [1] = clib_host_to_net_u64(0x0000000000000000),
4796                 },
4797             },
4798         }
4799     };
4800
4801     fib_table_entry_path_add(fib_index,
4802                              &pfx_2001_a_s_64,
4803                              FIB_SOURCE_API,
4804                              FIB_ENTRY_FLAG_NONE,
4805                              DPO_PROTO_IP6,
4806                              &nh_2001_2,
4807                              tm->hw[0]->sw_if_index,
4808                              ~0,
4809                              1,
4810                              NULL,
4811                              FIB_ROUTE_PATH_FLAG_NONE);
4812     fei = fib_table_lookup(fib_index, &pfx_2001_a_s_64);
4813     ai = fib_entry_get_adj(fei);
4814     FIB_TEST((ai_01 == ai), "2001::a/64 resolves via 2001:0:0:1::1");
4815     fib_table_entry_path_add(fib_index,
4816                              &pfx_2001_b_s_64,
4817                              FIB_SOURCE_API,
4818                              FIB_ENTRY_FLAG_NONE,
4819                              DPO_PROTO_IP6,
4820                              &nh_2001_2,
4821                              tm->hw[0]->sw_if_index,
4822                              ~0,
4823                              1,
4824                              NULL,
4825                              FIB_ROUTE_PATH_FLAG_NONE);
4826     fei = fib_table_lookup(fib_index, &pfx_2001_b_s_64);
4827     ai = fib_entry_get_adj(fei);
4828     FIB_TEST((ai_01 == ai), "2001::b/64 resolves via 2001:0:0:1::1");
4829
4830     /*
4831      * +2 entries, +1 shared path-list.
4832      */
4833     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
4834              fib_path_list_db_size());
4835     FIB_TEST((PNPS+5 == fib_path_list_pool_size()), "path list pool size is%d",
4836              fib_path_list_pool_size());
4837     FIB_TEST((ENPS+6 == fib_entry_pool_size()), "entry pool size is %d",
4838              fib_entry_pool_size());
4839
4840     /*
4841      * add a v4 prefix via a v6 next-hop
4842      */
4843     fib_prefix_t pfx_1_1_1_1_s_32 = {
4844         .fp_len = 32,
4845         .fp_proto = FIB_PROTOCOL_IP4,
4846         .fp_addr = {
4847             .ip4.as_u32 = 0x01010101,
4848         },
4849     };
4850     fei = fib_table_entry_path_add(0, // default table
4851                                    &pfx_1_1_1_1_s_32,
4852                                    FIB_SOURCE_API,
4853                                    FIB_ENTRY_FLAG_NONE,
4854                                    DPO_PROTO_IP6,
4855                                    &nh_2001_2,
4856                                    tm->hw[0]->sw_if_index,
4857                                    ~0,
4858                                    1,
4859                                    NULL,
4860                                    FIB_ROUTE_PATH_FLAG_NONE);
4861     FIB_TEST(fei == fib_table_lookup_exact_match(0, &pfx_1_1_1_1_s_32),
4862              "1.1.1.1/32 o v6 route present");
4863     ai = fib_entry_get_adj(fei);
4864     adj = adj_get(ai);
4865     FIB_TEST((adj->lookup_next_index == IP_LOOKUP_NEXT_ARP),
4866              "1.1.1.1/32 via ARP-adj");
4867     FIB_TEST((adj->ia_link == VNET_LINK_IP4),
4868              "1.1.1.1/32 ADJ-adj is link type v4");
4869     FIB_TEST((adj->ia_nh_proto == FIB_PROTOCOL_IP6),
4870              "1.1.1.1/32 ADJ-adj is NH proto v6");
4871     fib_table_entry_delete(0, &pfx_1_1_1_1_s_32, FIB_SOURCE_API);
4872
4873     /*
4874      * An attached route
4875      */
4876     fib_prefix_t pfx_2001_c_s_64 = {
4877         .fp_len   = 64,
4878         .fp_proto = FIB_PROTOCOL_IP6,
4879         .fp_addr  = {
4880             .ip6 = {
4881                 .as_u64 = {
4882                     [0] = clib_host_to_net_u64(0x200100000000000c),
4883                     [1] = clib_host_to_net_u64(0x0000000000000000),
4884                 },
4885             },
4886         }
4887     };
4888     fib_table_entry_path_add(fib_index,
4889                              &pfx_2001_c_s_64,
4890                              FIB_SOURCE_CLI,
4891                              FIB_ENTRY_FLAG_ATTACHED,
4892                              DPO_PROTO_IP6,
4893                              NULL,
4894                              tm->hw[0]->sw_if_index,
4895                              ~0,
4896                              1,
4897                              NULL,
4898                              FIB_ROUTE_PATH_FLAG_NONE);
4899     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_c_s_64);
4900     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached route present");
4901     ai = fib_entry_get_adj(fei);
4902     adj = adj_get(ai);
4903     FIB_TEST((adj->lookup_next_index == IP_LOOKUP_NEXT_GLEAN),
4904              "2001:0:0:c/64 attached resolves via glean");
4905
4906     fib_table_entry_path_remove(fib_index,
4907                                 &pfx_2001_c_s_64,
4908                                 FIB_SOURCE_CLI,
4909                                 DPO_PROTO_IP6,
4910                                 NULL,
4911                                 tm->hw[0]->sw_if_index,
4912                                 ~0,
4913                                 1,
4914                                 FIB_ROUTE_PATH_FLAG_NONE);
4915     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_c_s_64);
4916     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "attached route removed");
4917
4918     /*
4919      * Shutdown the interface on which we have a connected and through
4920      * which the routes are reachable.
4921      * This will result in the connected, adj-fibs, and routes linking to drop
4922      * The local/for-us prefix continues to receive.
4923      */
4924     clib_error_t * error;
4925
4926     error = vnet_sw_interface_set_flags(vnet_get_main(),
4927                                         tm->hw[0]->sw_if_index,
4928                                         ~VNET_SW_INTERFACE_FLAG_ADMIN_UP);
4929     FIB_TEST((NULL == error), "Interface shutdown OK");
4930
4931     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
4932     dpo = fib_entry_contribute_ip_forwarding(fei);
4933     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
4934              "2001::b/64 resolves via drop");
4935
4936     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
4937     dpo = fib_entry_contribute_ip_forwarding(fei);
4938     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
4939              "2001::a/64 resolves via drop");
4940     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
4941     dpo = fib_entry_contribute_ip_forwarding(fei);
4942     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
4943              "2001:0:0:1::3/64 resolves via drop");
4944     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
4945     dpo = fib_entry_contribute_ip_forwarding(fei);
4946     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
4947              "2001:0:0:1::2/64 resolves via drop");
4948     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
4949     dpo = fib_entry_contribute_ip_forwarding(fei);
4950     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
4951              "2001:0:0:1::1/128 not drop");
4952     local_pfx.fp_len = 64;
4953     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
4954     dpo = fib_entry_contribute_ip_forwarding(fei);
4955     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
4956              "2001:0:0:1/64 resolves via drop");
4957
4958     /*
4959      * no change
4960      */
4961     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
4962              fib_path_list_db_size());
4963     FIB_TEST((PNPS+5 == fib_path_list_pool_size()), "path list pool size is%d",
4964              fib_path_list_pool_size());
4965     FIB_TEST((ENPS+6 == fib_entry_pool_size()), "entry pool size is %d",
4966              fib_entry_pool_size());
4967
4968     /*
4969      * shutdown one of the other interfaces, then add a connected.
4970      * and swap one of the routes to it.
4971      */
4972     error = vnet_sw_interface_set_flags(vnet_get_main(),
4973                                         tm->hw[1]->sw_if_index,
4974                                         ~VNET_SW_INTERFACE_FLAG_ADMIN_UP);
4975     FIB_TEST((NULL == error), "Interface 1 shutdown OK");
4976
4977     fib_prefix_t connected_pfx = {
4978         .fp_len = 64,
4979         .fp_proto = FIB_PROTOCOL_IP6,
4980         .fp_addr = {
4981             .ip6 = {
4982                 /* 2001:0:0:2::1/64 */
4983                 .as_u64 = {
4984                     [0] = clib_host_to_net_u64(0x2001000000000002),
4985                     [1] = clib_host_to_net_u64(0x0000000000000001),
4986                 },
4987             },
4988         }
4989     };
4990     fib_table_entry_update_one_path(fib_index, &connected_pfx,
4991                                     FIB_SOURCE_INTERFACE,
4992                                     (FIB_ENTRY_FLAG_CONNECTED |
4993                                      FIB_ENTRY_FLAG_ATTACHED),
4994                                     DPO_PROTO_IP6,
4995                                     NULL,
4996                                     tm->hw[1]->sw_if_index,
4997                                     ~0,
4998                                     1,
4999                                     NULL,
5000                                     FIB_ROUTE_PATH_FLAG_NONE);
5001     fei = fib_table_lookup_exact_match(fib_index, &connected_pfx);
5002     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached interface route present");
5003     dpo = fib_entry_contribute_ip_forwarding(fei);
5004     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
5005     FIB_TEST(!dpo_cmp(dpo, dpo_drop),
5006              "2001:0:0:2/64 not resolves via drop");
5007
5008     connected_pfx.fp_len = 128;
5009     fib_table_entry_update_one_path(fib_index, &connected_pfx,
5010                                     FIB_SOURCE_INTERFACE,
5011                                     (FIB_ENTRY_FLAG_CONNECTED |
5012                                      FIB_ENTRY_FLAG_LOCAL),
5013                                     DPO_PROTO_IP6,
5014                                     NULL,
5015                                     tm->hw[0]->sw_if_index,
5016                                     ~0, // invalid fib index
5017                                     1,
5018                                     NULL,
5019                                     FIB_ROUTE_PATH_FLAG_NONE);
5020     fei = fib_table_lookup(fib_index, &connected_pfx);
5021
5022     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local interface route present");
5023     dpo = fib_entry_contribute_ip_forwarding(fei);
5024     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
5025     FIB_TEST((DPO_RECEIVE == dpo->dpoi_type),
5026              "local interface adj is local");
5027     rd = receive_dpo_get(dpo->dpoi_index);
5028     FIB_TEST((0 == ip46_address_cmp(&connected_pfx.fp_addr,
5029                                     &rd->rd_addr)),
5030              "local interface adj is receive ok");
5031
5032     /*
5033      * +2 entries, +2 unshared path-lists
5034      */
5035     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
5036              fib_path_list_db_size());
5037     FIB_TEST((PNPS+7 == fib_path_list_pool_size()), "path list pool size is%d",
5038              fib_path_list_pool_size());
5039     FIB_TEST((ENPS+8 == fib_entry_pool_size()), "entry pool size is %d",
5040              fib_entry_pool_size());
5041
5042
5043     /*
5044      * bring the interface back up. we expected the routes to return
5045      * to normal forwarding.
5046      */
5047     error = vnet_sw_interface_set_flags(vnet_get_main(),
5048                                         tm->hw[0]->sw_if_index,
5049                                         VNET_SW_INTERFACE_FLAG_ADMIN_UP);
5050     FIB_TEST((NULL == error), "Interface bring-up OK");
5051     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
5052     ai = fib_entry_get_adj(fei);
5053     FIB_TEST((ai_01 == ai), "2001::a/64 resolves via 2001:0:0:1::1");
5054     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
5055     ai = fib_entry_get_adj(fei);
5056     FIB_TEST((ai_01 == ai), "2001::b/64 resolves via 2001:0:0:1::1");
5057     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
5058     ai = fib_entry_get_adj(fei);
5059     FIB_TEST((ai_02 == ai), "ADJ-FIB resolves via adj");
5060     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5061     ai = fib_entry_get_adj(fei);
5062     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj");
5063     local_pfx.fp_len = 64;
5064     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5065     ai = fib_entry_get_adj(fei);
5066     adj = adj_get(ai);
5067     FIB_TEST((IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index),
5068              "attached interface adj is glean");
5069
5070     /*
5071      * Same test as above, but this time the HW interface goes down
5072      */
5073     error = vnet_hw_interface_set_flags(vnet_get_main(),
5074                                         tm->hw_if_indicies[0],
5075                                         ~VNET_HW_INTERFACE_FLAG_LINK_UP);
5076     FIB_TEST((NULL == error), "Interface shutdown OK");
5077
5078     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
5079     dpo = fib_entry_contribute_ip_forwarding(fei);
5080     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5081              "2001::b/64 resolves via drop");
5082     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
5083     dpo = fib_entry_contribute_ip_forwarding(fei);
5084     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5085              "2001::a/64 resolves via drop");
5086     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
5087     dpo = fib_entry_contribute_ip_forwarding(fei);
5088     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5089              "2001:0:0:1::3/128 resolves via drop");
5090     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5091     dpo = fib_entry_contribute_ip_forwarding(fei);
5092     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5093              "2001:0:0:1::2/128 resolves via drop");
5094     local_pfx.fp_len = 128;
5095     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5096     dpo = fib_entry_contribute_ip_forwarding(fei);
5097     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5098              "2001:0:0:1::1/128 not drop");
5099     local_pfx.fp_len = 64;
5100     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5101     dpo = fib_entry_contribute_ip_forwarding(fei);
5102     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5103              "2001:0:0:1/64 resolves via drop");
5104
5105     error = vnet_hw_interface_set_flags(vnet_get_main(),
5106                                         tm->hw_if_indicies[0],
5107                                         VNET_HW_INTERFACE_FLAG_LINK_UP);
5108     FIB_TEST((NULL == error), "Interface bring-up OK");
5109     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
5110     ai = fib_entry_get_adj(fei);
5111     FIB_TEST((ai_01 == ai), "2001::a/64 resolves via 2001:0:0:1::1");
5112     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
5113     ai = fib_entry_get_adj(fei);
5114     FIB_TEST((ai_01 == ai), "2001::b/64 resolves via 2001:0:0:1::1");
5115     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
5116     ai = fib_entry_get_adj(fei);
5117     FIB_TEST((ai_02 == ai), "ADJ-FIB resolves via adj");
5118     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5119     ai = fib_entry_get_adj(fei);
5120     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj");
5121     local_pfx.fp_len = 64;
5122     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5123     ai = fib_entry_get_adj(fei);
5124     adj = adj_get(ai);
5125     FIB_TEST((IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index),
5126              "attached interface adj is glean");
5127
5128     /*
5129      * Delete the interface that the routes reolve through.
5130      * Again no routes are removed. They all point to drop.
5131      *
5132      * This is considered an error case. The control plane should
5133      * not remove interfaces through which routes resolve, but
5134      * such things can happen. ALL affected routes will drop.
5135      */
5136     vnet_delete_hw_interface(vnet_get_main(), tm->hw_if_indicies[0]);
5137
5138     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
5139     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5140              "2001::b/64 resolves via drop");
5141     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
5142     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5143              "2001::b/64 resolves via drop");
5144     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
5145     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5146              "2001:0:0:1::3/64 resolves via drop");
5147     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5148     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5149              "2001:0:0:1::2/64 resolves via drop");
5150     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5151     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5152              "2001:0:0:1::1/128 is drop");
5153     local_pfx.fp_len = 64;
5154     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5155     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5156              "2001:0:0:1/64 resolves via drop");
5157
5158     /*
5159      * no change
5160      */
5161     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
5162              fib_path_list_db_size());
5163     FIB_TEST((PNPS+7 == fib_path_list_pool_size()), "path list pool size is%d",
5164              fib_path_list_pool_size());
5165     FIB_TEST((ENPS+8 == fib_entry_pool_size()), "entry pool size is %d",
5166              fib_entry_pool_size());
5167
5168     /*
5169      * Add the interface back. routes stay unresolved.
5170      */
5171     vnet_eth_interface_registration_t eir = {};
5172     eir.dev_class_index = test_interface_device_class.index;
5173     eir.dev_instance = 0;
5174     eir.address = hw_address;
5175     tm->hw_if_indicies[0] = vnet_eth_register_interface (vnet_get_main(), &eir);
5176
5177     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
5178     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5179              "2001::b/64 resolves via drop");
5180     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
5181     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5182              "2001::b/64 resolves via drop");
5183     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
5184     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5185              "2001:0:0:1::3/64 resolves via drop");
5186     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5187     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5188              "2001:0:0:1::2/64 resolves via drop");
5189     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5190     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5191              "2001:0:0:1::1/128 is drop");
5192     local_pfx.fp_len = 64;
5193     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5194     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5195              "2001:0:0:1/64 resolves via drop");
5196
5197     /*
5198      * CLEANUP ALL the routes
5199      */
5200     fib_table_entry_delete(fib_index,
5201                            &pfx_2001_c_s_64,
5202                            FIB_SOURCE_API);
5203     fib_table_entry_delete(fib_index,
5204                            &pfx_2001_a_s_64,
5205                            FIB_SOURCE_API);
5206     fib_table_entry_delete(fib_index,
5207                            &pfx_2001_b_s_64,
5208                            FIB_SOURCE_API);
5209     fib_table_entry_delete(fib_index,
5210                            &pfx_2001_1_3_s_128,
5211                            FIB_SOURCE_ADJ);
5212     fib_table_entry_delete(fib_index,
5213                            &pfx_2001_1_2_s_128,
5214                            FIB_SOURCE_ADJ);
5215     local_pfx.fp_len = 64;
5216     fib_table_entry_delete(fib_index, &local_pfx,
5217                            FIB_SOURCE_INTERFACE);
5218     local_pfx.fp_len = 128;
5219     fib_table_entry_special_remove(fib_index, &local_pfx,
5220                                    FIB_SOURCE_INTERFACE);
5221     connected_pfx.fp_len = 64;
5222     fib_table_entry_delete(fib_index, &connected_pfx,
5223                            FIB_SOURCE_INTERFACE);
5224     connected_pfx.fp_len = 128;
5225     fib_table_entry_special_remove(fib_index, &connected_pfx,
5226                                    FIB_SOURCE_INTERFACE);
5227
5228     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5229               fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64)),
5230              "2001::a/64 removed");
5231     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5232               fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64)),
5233              "2001::b/64 removed");
5234     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5235               fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128)),
5236              "2001:0:0:1::3/128 removed");
5237     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5238               fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128)),
5239              "2001:0:0:1::3/128 removed");
5240     local_pfx.fp_len = 64;
5241     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5242               fib_table_lookup_exact_match(fib_index, &local_pfx)),
5243              "2001:0:0:1/64 removed");
5244     local_pfx.fp_len = 128;
5245     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5246               fib_table_lookup_exact_match(fib_index, &local_pfx)),
5247              "2001:0:0:1::1/128 removed");
5248     connected_pfx.fp_len = 64;
5249     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5250               fib_table_lookup_exact_match(fib_index, &connected_pfx)),
5251              "2001:0:0:2/64 removed");
5252     connected_pfx.fp_len = 128;
5253     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5254               fib_table_lookup_exact_match(fib_index, &connected_pfx)),
5255              "2001:0:0:2::1/128 removed");
5256
5257     /*
5258      * -8 entries. -7 path-lists (1 was shared).
5259      */
5260     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
5261              fib_path_list_db_size());
5262     FIB_TEST((PNPS == fib_path_list_pool_size()), "path list pool size is%d",
5263              fib_path_list_pool_size());
5264     FIB_TEST((ENPS == fib_entry_pool_size()), "entry pool size is %d",
5265              fib_entry_pool_size());
5266
5267     /*
5268      * now remove the VRF
5269      */
5270
5271     for (ii = 0; ii < 4; ii++)
5272       fib_table_bind (FIB_PROTOCOL_IP6, tm->hw[ii]->sw_if_index, 0);
5273
5274     fib_table_unlock(fib_index, FIB_PROTOCOL_IP6, FIB_SOURCE_API);
5275
5276     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
5277              fib_path_list_db_size());
5278     FIB_TEST((PNPS-2 == fib_path_list_pool_size()), "path list pool size is%d",
5279              fib_path_list_pool_size());
5280     FIB_TEST((ENPS-2 == fib_entry_pool_size()), "entry pool size is %d",
5281              fib_entry_pool_size());
5282
5283     adj_unlock(ai_02);
5284     adj_unlock(ai_01);
5285
5286     /*
5287      * return the interfaces to up state
5288      */
5289     error = vnet_sw_interface_set_flags(vnet_get_main(),
5290                                         tm->hw[0]->sw_if_index,
5291                                         VNET_SW_INTERFACE_FLAG_ADMIN_UP);
5292     error = vnet_sw_interface_set_flags(vnet_get_main(),
5293                                         tm->hw[1]->sw_if_index,
5294                                         VNET_SW_INTERFACE_FLAG_ADMIN_UP);
5295
5296     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
5297              adj_nbr_db_size());
5298     FIB_TEST((0 == adj_glean_db_size()), "ADJ DB size is %d",
5299              adj_glean_db_size());
5300
5301     return (res);
5302 }
5303
5304 /*
5305  * Test Attached Exports
5306  */
5307 static int
5308 fib_test_ae (void)
5309 {
5310     const dpo_id_t *dpo, *dpo_drop;
5311     const u32 fib_index = 0;
5312     fib_node_index_t dfrt, fei;
5313     test_main_t *tm;
5314     int res;
5315
5316     res = 0;
5317     tm = &test_main;
5318
5319     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
5320              adj_nbr_db_size());
5321
5322     /*
5323      * add interface routes. We'll assume this works. It's more rigorously
5324      * tested elsewhere.
5325      */
5326     fib_prefix_t local_pfx = {
5327         .fp_len = 24,
5328         .fp_proto = FIB_PROTOCOL_IP4,
5329         .fp_addr = {
5330             .ip4 = {
5331                 /* 10.10.10.10 */
5332                 .as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
5333             },
5334         },
5335     };
5336
5337     fib_table_bind (FIB_PROTOCOL_IP4, tm->hw[0]->sw_if_index, fib_index);
5338
5339     dpo_drop = drop_dpo_get(DPO_PROTO_IP4);
5340
5341     fib_table_entry_update_one_path(fib_index, &local_pfx,
5342                                     FIB_SOURCE_INTERFACE,
5343                                     (FIB_ENTRY_FLAG_CONNECTED |
5344                                      FIB_ENTRY_FLAG_ATTACHED),
5345                                     DPO_PROTO_IP4,
5346                                     NULL,
5347                                     tm->hw[0]->sw_if_index,
5348                                     ~0,
5349                                     1,
5350                                     NULL,
5351                                     FIB_ROUTE_PATH_FLAG_NONE);
5352     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5353     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
5354              "attached interface route present");
5355
5356     local_pfx.fp_len = 32;
5357     fib_table_entry_update_one_path(fib_index, &local_pfx,
5358                                     FIB_SOURCE_INTERFACE,
5359                                     (FIB_ENTRY_FLAG_CONNECTED |
5360                                      FIB_ENTRY_FLAG_LOCAL),
5361                                     DPO_PROTO_IP4,
5362                                     NULL,
5363                                     tm->hw[0]->sw_if_index,
5364                                     ~0, // invalid fib index
5365                                     1,
5366                                     NULL,
5367                                     FIB_ROUTE_PATH_FLAG_NONE);
5368     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5369
5370     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
5371              "local interface route present");
5372
5373     /*
5374      * Add an 2 ARP entry => a complete ADJ plus adj-fib.
5375      */
5376     fib_prefix_t pfx_10_10_10_1_s_32 = {
5377         .fp_len = 32,
5378         .fp_proto = FIB_PROTOCOL_IP4,
5379         .fp_addr = {
5380             /* 10.10.10.1 */
5381             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
5382         },
5383     };
5384     fib_node_index_t ai;
5385
5386     fib_table_entry_path_add(fib_index,
5387                              &pfx_10_10_10_1_s_32,
5388                              FIB_SOURCE_ADJ,
5389                              FIB_ENTRY_FLAG_ATTACHED,
5390                              DPO_PROTO_IP4,
5391                              &pfx_10_10_10_1_s_32.fp_addr,
5392                              tm->hw[0]->sw_if_index,
5393                              ~0, // invalid fib index
5394                              1,
5395                              NULL,
5396                              FIB_ROUTE_PATH_FLAG_NONE);
5397
5398     fei = fib_table_lookup(fib_index, &pfx_10_10_10_1_s_32);
5399     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 created");
5400     ai = fib_entry_get_adj(fei);
5401
5402     /*
5403      * create another FIB table into which routes will be imported
5404      */
5405     u32 import_fib_index1;
5406
5407     import_fib_index1 = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4,
5408                                                           11,
5409                                                           FIB_SOURCE_CLI);
5410     /*
5411      * Add default route in the import FIB
5412      */
5413     fib_prefix_t pfx_0_0_0_0_s_0 = {
5414         .fp_len = 0,
5415         .fp_proto = FIB_PROTOCOL_IP4,
5416         .fp_addr = {
5417             .ip4 = {
5418                 {0}
5419             },
5420         },
5421     };
5422
5423     dfrt = fib_table_lookup(import_fib_index1, &pfx_0_0_0_0_s_0);
5424     FIB_TEST((FIB_NODE_INDEX_INVALID != dfrt), "default route present");
5425
5426     fib_table_entry_path_add(import_fib_index1,
5427                              &pfx_0_0_0_0_s_0,
5428                              FIB_SOURCE_API,
5429                              FIB_ENTRY_FLAG_NONE,
5430                              DPO_PROTO_IP4,
5431                              NULL,
5432                              tm->hw[0]->sw_if_index,
5433                              ~0, // invalid fib index
5434                              1,
5435                              NULL,
5436                              FIB_ROUTE_PATH_FLAG_NONE);
5437     fei = fib_table_lookup(fib_index, &pfx_0_0_0_0_s_0);
5438     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "default route present");
5439     FIB_TEST((fei != dfrt), "default route added");
5440
5441     /*
5442      * delete default route and check for the presence in the import table
5443      */
5444     fib_table_entry_delete(import_fib_index1, &pfx_0_0_0_0_s_0, FIB_SOURCE_API);
5445     fei = fib_table_lookup(import_fib_index1, &pfx_0_0_0_0_s_0);
5446     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "default route present");
5447     FIB_TEST((fei == dfrt), "default route removed");
5448
5449     /*
5450      * Add an attached route in the import FIB
5451      */
5452     local_pfx.fp_len = 24;
5453     fib_table_entry_update_one_path(import_fib_index1,
5454                                     &local_pfx,
5455                                     FIB_SOURCE_API,
5456                                     FIB_ENTRY_FLAG_NONE,
5457                                     DPO_PROTO_IP4,
5458                                     NULL,
5459                                     tm->hw[0]->sw_if_index,
5460                                     ~0, // invalid fib index
5461                                     1,
5462                                     NULL,
5463                                     FIB_ROUTE_PATH_FLAG_NONE);
5464     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5465     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached export created");
5466
5467     /*
5468      * check for the presence of the adj-fibs in the import table
5469      */
5470     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5471     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 imported");
5472     FIB_TEST((ai == fib_entry_get_adj(fei)),
5473              "adj-fib1 Import uses same adj as export");
5474
5475     /*
5476      * check for the presence of the local in the import table
5477      */
5478     local_pfx.fp_len = 32;
5479     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5480     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported");
5481
5482     /*
5483      * Add another adj-fin in the export table. Expect this
5484      * to get magically exported;
5485      */
5486     fib_prefix_t pfx_10_10_10_2_s_32 = {
5487         .fp_len = 32,
5488         .fp_proto = FIB_PROTOCOL_IP4,
5489         .fp_addr = {
5490             /* 10.10.10.2 */
5491             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
5492         },
5493     };
5494
5495     fib_table_entry_path_add(fib_index,
5496                              &pfx_10_10_10_2_s_32,
5497                              FIB_SOURCE_ADJ,
5498                              FIB_ENTRY_FLAG_ATTACHED,
5499                              DPO_PROTO_IP4,
5500                              &pfx_10_10_10_2_s_32.fp_addr,
5501                              tm->hw[0]->sw_if_index,
5502                              ~0, // invalid fib index
5503                              1,
5504                              NULL,
5505                              FIB_ROUTE_PATH_FLAG_NONE);
5506     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_2_s_32);
5507     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 present");
5508     ai = fib_entry_get_adj(fei);
5509
5510     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5511     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported");
5512     FIB_TEST((ai == fib_entry_get_adj(fei)),
5513              "Import uses same adj as export");
5514     FIB_TEST((FIB_ENTRY_FLAG_ATTACHED & fib_entry_get_flags(fei)),
5515              "ADJ-fib2 imported flags %d",
5516              fib_entry_get_flags(fei));
5517
5518     /*
5519      * create a 2nd FIB table into which routes will be imported
5520      */
5521     u32 import_fib_index2;
5522
5523     import_fib_index2 = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, 12,
5524                                                           FIB_SOURCE_CLI);
5525
5526     /*
5527      * Add an attached route in the import FIB
5528      */
5529     local_pfx.fp_len = 24;
5530     fib_table_entry_update_one_path(import_fib_index2,
5531                                     &local_pfx,
5532                                     FIB_SOURCE_API,
5533                                     FIB_ENTRY_FLAG_NONE,
5534                                     DPO_PROTO_IP4,
5535                                     NULL,
5536                                     tm->hw[0]->sw_if_index,
5537                                     ~0, // invalid fib index
5538                                     1,
5539                                     NULL,
5540                                     FIB_ROUTE_PATH_FLAG_NONE);
5541     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5542     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached export created");
5543
5544     /*
5545      * check for the presence of all the adj-fibs and local in the import table
5546      */
5547     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_1_s_32);
5548     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 imported");
5549     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_2_s_32);
5550     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported");
5551     local_pfx.fp_len = 32;
5552     fei = fib_table_lookup_exact_match(import_fib_index2, &local_pfx);
5553     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported");
5554
5555     /*
5556      * add a 3rd adj-fib. expect it to be exported to both tables.
5557      */
5558     fib_prefix_t pfx_10_10_10_3_s_32 = {
5559         .fp_len = 32,
5560         .fp_proto = FIB_PROTOCOL_IP4,
5561         .fp_addr = {
5562             /* 10.10.10.3 */
5563             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a03),
5564         },
5565     };
5566
5567     fib_table_entry_path_add(fib_index,
5568                              &pfx_10_10_10_3_s_32,
5569                              FIB_SOURCE_ADJ,
5570                              FIB_ENTRY_FLAG_ATTACHED,
5571                              DPO_PROTO_IP4,
5572                              &pfx_10_10_10_3_s_32.fp_addr,
5573                              tm->hw[0]->sw_if_index,
5574                              ~0, // invalid fib index
5575                              1,
5576                              NULL,
5577                              FIB_ROUTE_PATH_FLAG_NONE);
5578     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3_s_32);
5579     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib3 present");
5580     ai = fib_entry_get_adj(fei);
5581
5582     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_3_s_32);
5583     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib3 imported to FIB1");
5584     FIB_TEST((ai == fib_entry_get_adj(fei)),
5585              "Import uses same adj as export");
5586     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_3_s_32);
5587     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib3 imported to FIB2");
5588     FIB_TEST((ai == fib_entry_get_adj(fei)),
5589              "Import uses same adj as export");
5590
5591     /*
5592      * remove the 3rd adj fib. we expect it to be removed from both FIBs
5593      */
5594     fib_table_entry_delete(fib_index,
5595                            &pfx_10_10_10_3_s_32,
5596                            FIB_SOURCE_ADJ);
5597
5598     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3_s_32);
5599     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib3 remved");
5600
5601     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_3_s_32);
5602     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib3 removed from FIB1");
5603
5604     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_3_s_32);
5605     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib3 removed from FIB2");
5606
5607     /*
5608      * remove the attached route from the 2nd FIB. expect the imported
5609      * entries to be removed
5610      */
5611     local_pfx.fp_len = 24;
5612     fib_table_entry_delete(import_fib_index2,
5613                            &local_pfx,
5614                            FIB_SOURCE_API);
5615     fei = fib_table_lookup_exact_match(import_fib_index2, &local_pfx);
5616     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "attached export removed");
5617
5618     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_1_s_32);
5619     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib1 removed from FIB2");
5620     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_2_s_32);
5621     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib2 removed from FIB2");
5622     local_pfx.fp_len = 32;
5623     fei = fib_table_lookup_exact_match(import_fib_index2, &local_pfx);
5624     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "local removed from FIB2");
5625
5626     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5627     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 still in FIB1");
5628     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5629     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 still in FIB1");
5630     local_pfx.fp_len = 32;
5631     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5632     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local still in FIB1");
5633
5634     /*
5635      * modify the route in FIB1 so it is no longer attached. expect the imported
5636      * entries to be removed
5637      */
5638     local_pfx.fp_len = 24;
5639     fib_table_entry_update_one_path(import_fib_index1,
5640                                     &local_pfx,
5641                                     FIB_SOURCE_API,
5642                                     FIB_ENTRY_FLAG_NONE,
5643                                     DPO_PROTO_IP4,
5644                                     &pfx_10_10_10_2_s_32.fp_addr,
5645                                     tm->hw[0]->sw_if_index,
5646                                     ~0, // invalid fib index
5647                                     1,
5648                                     NULL,
5649                                     FIB_ROUTE_PATH_FLAG_NONE);
5650     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5651     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib1 removed from FIB1");
5652     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5653     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib2 removed from FIB1");
5654     local_pfx.fp_len = 32;
5655     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5656     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "local removed from FIB1");
5657
5658     /*
5659      * modify it back to attached. expect the adj-fibs back
5660      */
5661     local_pfx.fp_len = 24;
5662     fib_table_entry_update_one_path(import_fib_index1,
5663                                     &local_pfx,
5664                                     FIB_SOURCE_API,
5665                                     FIB_ENTRY_FLAG_NONE,
5666                                     DPO_PROTO_IP4,
5667                                     NULL,
5668                                     tm->hw[0]->sw_if_index,
5669                                     ~0, // invalid fib index
5670                                     1,
5671                                     NULL,
5672                                     FIB_ROUTE_PATH_FLAG_NONE);
5673     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5674     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 imported in FIB1");
5675     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5676     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported in FIB1");
5677     local_pfx.fp_len = 32;
5678     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5679     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported in FIB1");
5680
5681     /*
5682      * add a covering attached next-hop for the interface address, so we have
5683      * a valid adj to find when we check the forwarding tables
5684      */
5685     fib_prefix_t pfx_10_0_0_0_s_8 = {
5686         .fp_len = 8,
5687         .fp_proto = FIB_PROTOCOL_IP4,
5688         .fp_addr = {
5689             /* 10.0.0.0 */
5690             .ip4.as_u32 = clib_host_to_net_u32(0x0a000000),
5691         },
5692     };
5693
5694     fei = fib_table_entry_update_one_path(fib_index,
5695                                           &pfx_10_0_0_0_s_8,
5696                                           FIB_SOURCE_API,
5697                                           FIB_ENTRY_FLAG_NONE,
5698                                           DPO_PROTO_IP4,
5699                                           &pfx_10_10_10_3_s_32.fp_addr,
5700                                           tm->hw[0]->sw_if_index,
5701                                           ~0, // invalid fib index
5702                                           1,
5703                                           NULL,
5704                                           FIB_ROUTE_PATH_FLAG_NONE);
5705     dpo = fib_entry_contribute_ip_forwarding(fei);
5706
5707     /*
5708      * remove the route in the export fib. expect the adj-fibs to be removed
5709      */
5710     local_pfx.fp_len = 24;
5711     fib_table_entry_delete(fib_index,
5712                            &local_pfx,
5713                            FIB_SOURCE_INTERFACE);
5714
5715     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5716     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "Delete export: ADJ-fib1 removed from FIB1");
5717     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5718     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib2 removed from FIB1");
5719     local_pfx.fp_len = 32;
5720     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5721     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "local removed from FIB1");
5722
5723     /*
5724      * the adj-fibs in the export VRF are present in the FIB table,
5725      * but not installed in forwarding, since they have no attached cover.
5726      * Consequently a lookup in the MTRIE gives the adj for the covering
5727      * route 10.0.0.0/8.
5728      */
5729     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
5730     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 in export");
5731
5732     index_t lbi;
5733     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_1_s_32.fp_addr.ip4);
5734     FIB_TEST(lbi == dpo->dpoi_index,
5735              "10.10.10.1 forwards on \n%U not \n%U",
5736              format_load_balance, lbi, 0,
5737              format_dpo_id, dpo, 0);
5738     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_2_s_32.fp_addr.ip4);
5739     FIB_TEST(lbi == dpo->dpoi_index,
5740              "10.10.10.2 forwards on %U", format_dpo_id, dpo, 0);
5741     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_3_s_32.fp_addr.ip4);
5742     FIB_TEST(lbi == dpo->dpoi_index,
5743              "10.10.10.3 forwards on %U", format_dpo_id, dpo, 0);
5744
5745     /*
5746      * add the export prefix back, but not as attached.
5747      * No adj-fibs in export nor import tables
5748      */
5749     local_pfx.fp_len = 24;
5750     fei = fib_table_entry_update_one_path(fib_index,
5751                                           &local_pfx,
5752                                           FIB_SOURCE_API,
5753                                           FIB_ENTRY_FLAG_NONE,
5754                                           DPO_PROTO_IP4,
5755                                           &pfx_10_10_10_1_s_32.fp_addr,
5756                                           tm->hw[0]->sw_if_index,
5757                                           ~0, // invalid fib index
5758                                           1,
5759                                           NULL,
5760                                           FIB_ROUTE_PATH_FLAG_NONE);
5761     dpo = fib_entry_contribute_ip_forwarding(fei);
5762
5763     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
5764     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "non-attached in export: ADJ-fib1 in export");
5765     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_1_s_32.fp_addr.ip4);
5766     FIB_TEST(lbi == dpo->dpoi_index,
5767              "10.10.10.1 forwards on %U", format_dpo_id, dpo, 0);
5768     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
5769     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 in export");
5770     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_2_s_32.fp_addr.ip4);
5771     FIB_TEST(lbi == dpo->dpoi_index,
5772              "10.10.10.2 forwards on %U", format_dpo_id, dpo, 0);
5773
5774     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5775     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib1 removed from FIB1");
5776     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5777     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib2 removed from FIB1");
5778     local_pfx.fp_len = 32;
5779     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5780     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "local removed from FIB1");
5781
5782     /*
5783      * modify the export prefix so it is attached. expect all covereds to return
5784      */
5785     local_pfx.fp_len = 24;
5786     fib_table_entry_update_one_path(fib_index,
5787                                     &local_pfx,
5788                                     FIB_SOURCE_API,
5789                                     FIB_ENTRY_FLAG_NONE,
5790                                     DPO_PROTO_IP4,
5791                                     NULL,
5792                                     tm->hw[0]->sw_if_index,
5793                                     ~0, // invalid fib index
5794                                     1,
5795                                     NULL,
5796                                     FIB_ROUTE_PATH_FLAG_NONE);
5797
5798     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
5799     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 reinstalled in export");
5800     dpo = fib_entry_contribute_ip_forwarding(fei);
5801     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5802              "Adj-fib1 is not drop in export");
5803     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_2_s_32);
5804     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 reinstalled in export");
5805     local_pfx.fp_len = 32;
5806     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5807     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local reinstalled in export");
5808     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5809     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached in export: ADJ-fib1 imported");
5810     dpo = fib_entry_contribute_ip_forwarding(fei);
5811     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5812              "Adj-fib1 is not drop in export: %U %U",
5813              format_dpo_id, dpo, 0,
5814              format_dpo_id, load_balance_get_bucket(dpo->dpoi_index, 0), 0);
5815     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5816     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 imported");
5817     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5818     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported");
5819     local_pfx.fp_len = 32;
5820     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5821     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported");
5822
5823     /*
5824      * modify the export prefix so connected. no change.
5825      */
5826     local_pfx.fp_len = 24;
5827     fib_table_entry_update_one_path(fib_index, &local_pfx,
5828                                     FIB_SOURCE_INTERFACE,
5829                                     (FIB_ENTRY_FLAG_CONNECTED |
5830                                      FIB_ENTRY_FLAG_ATTACHED),
5831                                     DPO_PROTO_IP4,
5832                                     NULL,
5833                                     tm->hw[0]->sw_if_index,
5834                                     ~0,
5835                                     1,
5836                                     NULL,
5837                                     FIB_ROUTE_PATH_FLAG_NONE);
5838
5839     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
5840     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 reinstalled in export");
5841     dpo = fib_entry_contribute_ip_forwarding(fei);
5842     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5843              "Adj-fib1 is not drop in export");
5844     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_2_s_32);
5845     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 reinstalled in export");
5846     local_pfx.fp_len = 32;
5847     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5848     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local reinstalled in export");
5849     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5850     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached in export: ADJ-fib1 imported");
5851     dpo = fib_entry_contribute_ip_forwarding(fei);
5852     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5853              "Adj-fib1 is not drop in export");
5854     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5855     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported");
5856     local_pfx.fp_len = 32;
5857     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5858     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported");
5859
5860     /*
5861      * CLEANUP
5862      */
5863     fib_table_entry_delete(fib_index,
5864                            &pfx_10_0_0_0_s_8,
5865                            FIB_SOURCE_API);
5866     fib_table_entry_delete(fib_index,
5867                            &pfx_10_10_10_1_s_32,
5868                            FIB_SOURCE_ADJ);
5869     fib_table_entry_delete(fib_index,
5870                            &pfx_10_10_10_2_s_32,
5871                            FIB_SOURCE_ADJ);
5872     local_pfx.fp_len = 32;
5873     fib_table_entry_delete(fib_index,
5874                            &local_pfx,
5875                            FIB_SOURCE_INTERFACE);
5876     local_pfx.fp_len = 24;
5877     fib_table_entry_delete(fib_index,
5878                            &local_pfx,
5879                            FIB_SOURCE_API);
5880     fib_table_entry_delete(fib_index,
5881                            &local_pfx,
5882                            FIB_SOURCE_INTERFACE);
5883     local_pfx.fp_len = 24;
5884     fib_table_entry_delete(import_fib_index1,
5885                            &local_pfx,
5886                            FIB_SOURCE_API);
5887
5888     fib_table_unlock(import_fib_index1, FIB_PROTOCOL_IP4, FIB_SOURCE_CLI);
5889     fib_table_unlock(import_fib_index2, FIB_PROTOCOL_IP4, FIB_SOURCE_CLI);
5890
5891     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
5892              adj_nbr_db_size());
5893
5894     return (res);
5895 }
5896
5897 /*
5898  * Test Path Preference
5899  */
5900 static int
5901 fib_test_pref (void)
5902 {
5903     test_main_t *tm;
5904     int res, i;
5905
5906     tm = &test_main;
5907     res = 0;
5908
5909     const fib_prefix_t pfx_1_1_1_1_s_32 = {
5910         .fp_len = 32,
5911         .fp_proto = FIB_PROTOCOL_IP4,
5912         .fp_addr = {
5913             .ip4 = {
5914                 .as_u32 = clib_host_to_net_u32(0x01010101),
5915             },
5916         },
5917     };
5918
5919     for (i = 0; i <= 2; i++)
5920       fib_table_bind (FIB_PROTOCOL_IP4, tm->hw[i]->sw_if_index, 0);
5921
5922     /*
5923      * 2 high, 2 medium and 2 low preference non-recursive paths
5924      */
5925     fib_route_path_t nr_path_hi_1 = {
5926         .frp_proto = DPO_PROTO_IP4,
5927         .frp_sw_if_index = tm->hw[0]->sw_if_index,
5928         .frp_fib_index = ~0,
5929         .frp_weight = 1,
5930         .frp_preference = 0,
5931         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5932         .frp_addr = {
5933             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
5934         },
5935     };
5936     fib_route_path_t nr_path_hi_2 = {
5937         .frp_proto = DPO_PROTO_IP4,
5938         .frp_sw_if_index = tm->hw[0]->sw_if_index,
5939         .frp_fib_index = ~0,
5940         .frp_weight = 1,
5941         .frp_preference = 0,
5942         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5943         .frp_addr = {
5944             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
5945         },
5946     };
5947     fib_route_path_t nr_path_med_1 = {
5948         .frp_proto = DPO_PROTO_IP4,
5949         .frp_sw_if_index = tm->hw[1]->sw_if_index,
5950         .frp_fib_index = ~0,
5951         .frp_weight = 1,
5952         .frp_preference = 1,
5953         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5954         .frp_addr = {
5955             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0c01),
5956         },
5957     };
5958     fib_route_path_t nr_path_med_2 = {
5959         .frp_proto = DPO_PROTO_IP4,
5960         .frp_sw_if_index = tm->hw[1]->sw_if_index,
5961         .frp_fib_index = ~0,
5962         .frp_weight = 1,
5963         .frp_preference = 1,
5964         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5965         .frp_addr = {
5966             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0c01),
5967         },
5968     };
5969     fib_route_path_t nr_path_low_1 = {
5970         .frp_proto = DPO_PROTO_IP4,
5971         .frp_sw_if_index = tm->hw[2]->sw_if_index,
5972         .frp_fib_index = ~0,
5973         .frp_weight = 1,
5974         .frp_preference = 2,
5975         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5976         .frp_addr = {
5977             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0b01),
5978         },
5979     };
5980     fib_route_path_t nr_path_low_2 = {
5981         .frp_proto = DPO_PROTO_IP4,
5982         .frp_sw_if_index = tm->hw[2]->sw_if_index,
5983         .frp_fib_index = ~0,
5984         .frp_weight = 1,
5985         .frp_preference = 2,
5986         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5987         .frp_addr = {
5988             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0b02),
5989         },
5990     };
5991     fib_route_path_t *nr_paths = NULL;
5992
5993     vec_add1(nr_paths, nr_path_hi_1);
5994     vec_add1(nr_paths, nr_path_hi_2);
5995     vec_add1(nr_paths, nr_path_med_1);
5996     vec_add1(nr_paths, nr_path_med_2);
5997     vec_add1(nr_paths, nr_path_low_1);
5998     vec_add1(nr_paths, nr_path_low_2);
5999
6000     adj_index_t ai_hi_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6001                                               VNET_LINK_IP4,
6002                                               &nr_path_hi_1.frp_addr,
6003                                               nr_path_hi_1.frp_sw_if_index);
6004     adj_index_t ai_hi_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6005                                               VNET_LINK_IP4,
6006                                               &nr_path_hi_2.frp_addr,
6007                                               nr_path_hi_2.frp_sw_if_index);
6008     adj_index_t ai_med_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6009                                                VNET_LINK_IP4,
6010                                                &nr_path_med_1.frp_addr,
6011                                                nr_path_med_1.frp_sw_if_index);
6012     adj_index_t ai_med_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6013                                                VNET_LINK_IP4,
6014                                                &nr_path_med_2.frp_addr,
6015                                                nr_path_med_2.frp_sw_if_index);
6016     adj_index_t ai_low_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6017                                                VNET_LINK_IP4,
6018                                                &nr_path_low_1.frp_addr,
6019                                                nr_path_low_1.frp_sw_if_index);
6020     adj_index_t ai_low_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6021                                                VNET_LINK_IP4,
6022                                                &nr_path_low_2.frp_addr,
6023                                                nr_path_low_2.frp_sw_if_index);
6024
6025     fib_test_lb_bucket_t ip_hi_1 = {
6026         .type = FT_LB_ADJ,
6027         .adj = {
6028             .adj = ai_hi_1,
6029         },
6030     };
6031     fib_test_lb_bucket_t ip_hi_2 = {
6032         .type = FT_LB_ADJ,
6033         .adj = {
6034             .adj = ai_hi_2,
6035         },
6036     };
6037     fib_test_lb_bucket_t ip_med_1 = {
6038         .type = FT_LB_ADJ,
6039         .adj = {
6040             .adj = ai_med_1,
6041         },
6042     };
6043     fib_test_lb_bucket_t ip_med_2 = {
6044         .type = FT_LB_ADJ,
6045         .adj = {
6046             .adj = ai_med_2,
6047         },
6048     };
6049     fib_test_lb_bucket_t ip_low_1 = {
6050         .type = FT_LB_ADJ,
6051         .adj = {
6052             .adj = ai_low_1,
6053         },
6054     };
6055     fib_test_lb_bucket_t ip_low_2 = {
6056         .type = FT_LB_ADJ,
6057         .adj = {
6058             .adj = ai_low_2,
6059         },
6060     };
6061
6062     fib_node_index_t fei;
6063
6064     fei = fib_table_entry_path_add2(0,
6065                                     &pfx_1_1_1_1_s_32,
6066                                     FIB_SOURCE_API,
6067                                     FIB_ENTRY_FLAG_NONE,
6068                                     nr_paths);
6069
6070     FIB_TEST(!fib_test_validate_entry(fei,
6071                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6072                                       2,
6073                                       &ip_hi_1,
6074                                       &ip_hi_2),
6075              "1.1.1.1/32 via high preference paths");
6076
6077     /*
6078      * bring down the interface on which the high preference path lie
6079      */
6080     vnet_sw_interface_set_flags(vnet_get_main(),
6081                                 tm->hw[0]->sw_if_index,
6082                                 0);
6083
6084     FIB_TEST(!fib_test_validate_entry(fei,
6085                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6086                                       2,
6087                                       &ip_med_1,
6088                                       &ip_med_2),
6089              "1.1.1.1/32 via medium preference paths");
6090
6091     /*
6092      * bring down the interface on which the medium preference path lie
6093      */
6094     vnet_sw_interface_set_flags(vnet_get_main(),
6095                                 tm->hw[1]->sw_if_index,
6096                                 0);
6097
6098     FIB_TEST(!fib_test_validate_entry(fei,
6099                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6100                                       2,
6101                                       &ip_low_1,
6102                                       &ip_low_2),
6103              "1.1.1.1/32 via low preference paths");
6104
6105     /*
6106      * bring up the interface on which the high preference path lie
6107      */
6108     vnet_sw_interface_set_flags(vnet_get_main(),
6109                                 tm->hw[0]->sw_if_index,
6110                                 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
6111
6112     FIB_TEST(!fib_test_validate_entry(fei,
6113                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6114                                       2,
6115                                       &ip_hi_1,
6116                                       &ip_hi_2),
6117              "1.1.1.1/32 via high preference paths");
6118
6119     /*
6120      * bring up the interface on which the medium preference path lie
6121      */
6122     vnet_sw_interface_set_flags(vnet_get_main(),
6123                                 tm->hw[1]->sw_if_index,
6124                                 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
6125
6126     FIB_TEST(!fib_test_validate_entry(fei,
6127                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6128                                       2,
6129                                       &ip_hi_1,
6130                                       &ip_hi_2),
6131              "1.1.1.1/32 via high preference paths");
6132
6133     dpo_id_t ip_1_1_1_1 = DPO_INVALID;
6134     fib_entry_contribute_forwarding(fei,
6135                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6136                                     &ip_1_1_1_1);
6137
6138     /*
6139      * 3 recursive paths of different preference
6140      */
6141     const fib_prefix_t pfx_1_1_1_2_s_32 = {
6142         .fp_len = 32,
6143         .fp_proto = FIB_PROTOCOL_IP4,
6144         .fp_addr = {
6145             .ip4 = {
6146                 .as_u32 = clib_host_to_net_u32(0x01010102),
6147             },
6148         },
6149     };
6150     const fib_prefix_t pfx_1_1_1_3_s_32 = {
6151         .fp_len = 32,
6152         .fp_proto = FIB_PROTOCOL_IP4,
6153         .fp_addr = {
6154             .ip4 = {
6155                 .as_u32 = clib_host_to_net_u32(0x01010103),
6156             },
6157         },
6158     };
6159     fei = fib_table_entry_path_add2(0,
6160                                     &pfx_1_1_1_2_s_32,
6161                                     FIB_SOURCE_API,
6162                                     FIB_ENTRY_FLAG_NONE,
6163                                     nr_paths);
6164     dpo_id_t ip_1_1_1_2 = DPO_INVALID;
6165     fib_entry_contribute_forwarding(fei,
6166                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6167                                     &ip_1_1_1_2);
6168     fei = fib_table_entry_path_add2(0,
6169                                     &pfx_1_1_1_3_s_32,
6170                                     FIB_SOURCE_API,
6171                                     FIB_ENTRY_FLAG_NONE,
6172                                     nr_paths);
6173     dpo_id_t ip_1_1_1_3 = DPO_INVALID;
6174     fib_entry_contribute_forwarding(fei,
6175                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6176                                     &ip_1_1_1_3);
6177
6178     fib_test_lb_bucket_t ip_o_1_1_1_1 = {
6179         .type = FT_LB_O_LB,
6180         .lb = {
6181             .lb = ip_1_1_1_1.dpoi_index,
6182         },
6183     };
6184     fib_test_lb_bucket_t ip_o_1_1_1_2 = {
6185         .type = FT_LB_O_LB,
6186         .lb = {
6187             .lb = ip_1_1_1_2.dpoi_index,
6188         },
6189     };
6190     fib_test_lb_bucket_t ip_o_1_1_1_3 = {
6191         .type = FT_LB_O_LB,
6192         .lb = {
6193             .lb = ip_1_1_1_3.dpoi_index,
6194         },
6195     };
6196     fib_route_path_t r_path_hi = {
6197         .frp_proto = DPO_PROTO_IP4,
6198         .frp_sw_if_index = ~0,
6199         .frp_fib_index = 0,
6200         .frp_weight = 1,
6201         .frp_preference = 0,
6202         .frp_flags = FIB_ROUTE_PATH_RESOLVE_VIA_HOST,
6203         .frp_addr = pfx_1_1_1_1_s_32.fp_addr,
6204     };
6205     fib_route_path_t r_path_med = {
6206         .frp_proto = DPO_PROTO_IP4,
6207         .frp_sw_if_index = ~0,
6208         .frp_fib_index = 0,
6209         .frp_weight = 1,
6210         .frp_preference = 10,
6211         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
6212         .frp_addr = pfx_1_1_1_2_s_32.fp_addr,
6213     };
6214     fib_route_path_t r_path_low = {
6215         .frp_proto = DPO_PROTO_IP4,
6216         .frp_sw_if_index = ~0,
6217         .frp_fib_index = 0,
6218         .frp_weight = 1,
6219         .frp_preference = 255,
6220         .frp_flags = FIB_ROUTE_PATH_RESOLVE_VIA_HOST,
6221         .frp_addr = pfx_1_1_1_3_s_32.fp_addr,
6222     };
6223     fib_route_path_t *r_paths = NULL;
6224
6225     vec_add1(r_paths, r_path_hi);
6226     vec_add1(r_paths, r_path_low);
6227     vec_add1(r_paths, r_path_med);
6228
6229     /*
6230      * add many recursive so we get the LB MAp created
6231      */
6232 #define N_PFXS 64
6233     fib_prefix_t pfx_r[N_PFXS];
6234     unsigned int n_pfxs;
6235     for (n_pfxs = 0; n_pfxs < N_PFXS; n_pfxs++)
6236     {
6237         pfx_r[n_pfxs].fp_len = 32;
6238         pfx_r[n_pfxs].fp_proto = FIB_PROTOCOL_IP4;
6239         pfx_r[n_pfxs].fp_addr.ip4.as_u32 =
6240             clib_host_to_net_u32(0x02000000 + n_pfxs);
6241
6242         fei = fib_table_entry_path_add2(0,
6243                                         &pfx_r[n_pfxs],
6244                                         FIB_SOURCE_API,
6245                                         FIB_ENTRY_FLAG_NONE,
6246                                         r_paths);
6247
6248         FIB_TEST(!fib_test_validate_entry(fei,
6249                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6250                                           1,
6251                                           &ip_o_1_1_1_1),
6252                  "recursive via high preference paths");
6253
6254         /*
6255          * withdraw hig pref resolving entry
6256          */
6257         fib_table_entry_delete(0,
6258                                &pfx_1_1_1_1_s_32,
6259                                FIB_SOURCE_API);
6260
6261         /* suspend so the update walk kicks int */
6262         vlib_process_suspend(vlib_get_main(), 1e-5);
6263
6264         FIB_TEST(!fib_test_validate_entry(fei,
6265                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6266                                           1,
6267                                           &ip_o_1_1_1_2),
6268                  "recursive via medium preference paths");
6269
6270         /*
6271          * withdraw medium pref resolving entry
6272          */
6273         fib_table_entry_delete(0,
6274                                &pfx_1_1_1_2_s_32,
6275                                FIB_SOURCE_API);
6276
6277         /* suspend so the update walk kicks int */
6278         vlib_process_suspend(vlib_get_main(), 1e-5);
6279
6280         FIB_TEST(!fib_test_validate_entry(fei,
6281                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6282                                           1,
6283                                           &ip_o_1_1_1_3),
6284                  "recursive via low preference paths");
6285
6286         /*
6287          * add back paths for next iteration
6288          */
6289         fei = fib_table_entry_update(0,
6290                                      &pfx_1_1_1_2_s_32,
6291                                      FIB_SOURCE_API,
6292                                      FIB_ENTRY_FLAG_NONE,
6293                                      nr_paths);
6294         fei = fib_table_entry_update(0,
6295                                      &pfx_1_1_1_1_s_32,
6296                                      FIB_SOURCE_API,
6297                                      FIB_ENTRY_FLAG_NONE,
6298                                      nr_paths);
6299
6300         /* suspend so the update walk kicks int */
6301         vlib_process_suspend(vlib_get_main(), 1e-5);
6302
6303         fei = fib_table_lookup_exact_match(0, &pfx_r[n_pfxs]);
6304         FIB_TEST(!fib_test_validate_entry(fei,
6305                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6306                                           1,
6307                                           &ip_o_1_1_1_1),
6308                  "recursive via high preference paths");
6309     }
6310
6311
6312     fib_table_entry_delete(0,
6313                            &pfx_1_1_1_1_s_32,
6314                            FIB_SOURCE_API);
6315
6316     /* suspend so the update walk kicks int */
6317     vlib_process_suspend(vlib_get_main(), 1e-5);
6318
6319     for (n_pfxs = 0; n_pfxs < N_PFXS; n_pfxs++)
6320     {
6321         fei = fib_table_lookup_exact_match(0, &pfx_r[n_pfxs]);
6322
6323         FIB_TEST(!fib_test_validate_entry(fei,
6324                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6325                                           1,
6326                                           &ip_o_1_1_1_2),
6327                  "recursive via medium preference paths");
6328     }
6329     for (n_pfxs = 0; n_pfxs < N_PFXS; n_pfxs++)
6330     {
6331         fib_table_entry_delete(0,
6332                                &pfx_r[n_pfxs],
6333                                FIB_SOURCE_API);
6334     }
6335
6336     /*
6337      * Cleanup
6338      */
6339     fib_table_entry_delete(0,
6340                            &pfx_1_1_1_2_s_32,
6341                            FIB_SOURCE_API);
6342     fib_table_entry_delete(0,
6343                            &pfx_1_1_1_3_s_32,
6344                            FIB_SOURCE_API);
6345
6346     dpo_reset(&ip_1_1_1_1);
6347     dpo_reset(&ip_1_1_1_2);
6348     dpo_reset(&ip_1_1_1_3);
6349     adj_unlock(ai_low_2);
6350     adj_unlock(ai_low_1);
6351     adj_unlock(ai_med_2);
6352     adj_unlock(ai_med_1);
6353     adj_unlock(ai_hi_2);
6354     adj_unlock(ai_hi_1);
6355
6356     return (res);
6357 }
6358
6359 /*
6360  * Test the recursive route route handling for GRE tunnels
6361  */
6362 static int
6363 fib_test_label (void)
6364 {
6365     fib_node_index_t fei, ai_mpls_10_10_10_1, ai_v4_10_10_11_1, ai_v4_10_10_11_2, ai_mpls_10_10_11_2, ai_mpls_10_10_11_1;
6366     const u32 fib_index = 0;
6367     int lb_count, ii, res;
6368     test_main_t *tm;
6369
6370     res = 0;
6371     lb_count = pool_elts(load_balance_pool);
6372     tm = &test_main;
6373
6374     /*
6375      * add interface routes. We'll assume this works. It's more rigorously
6376      * tested elsewhere.
6377      */
6378     fib_prefix_t local0_pfx = {
6379         .fp_len = 24,
6380         .fp_proto = FIB_PROTOCOL_IP4,
6381         .fp_addr = {
6382             .ip4 = {
6383                 /* 10.10.10.10 */
6384                 .as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
6385             },
6386         },
6387     };
6388
6389     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
6390              adj_nbr_db_size());
6391
6392     fib_table_bind (FIB_PROTOCOL_IP4, tm->hw[0]->sw_if_index, fib_index);
6393
6394     fib_table_entry_update_one_path(fib_index, &local0_pfx,
6395                                     FIB_SOURCE_INTERFACE,
6396                                     (FIB_ENTRY_FLAG_CONNECTED |
6397                                      FIB_ENTRY_FLAG_ATTACHED),
6398                                     DPO_PROTO_IP4,
6399                                     NULL,
6400                                     tm->hw[0]->sw_if_index,
6401                                     ~0,
6402                                     1,
6403                                     NULL,
6404                                     FIB_ROUTE_PATH_FLAG_NONE);
6405     fei = fib_table_lookup_exact_match(fib_index, &local0_pfx);
6406     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
6407              "attached interface route present");
6408
6409     local0_pfx.fp_len = 32;
6410     fib_table_entry_update_one_path(fib_index, &local0_pfx,
6411                                     FIB_SOURCE_INTERFACE,
6412                                     (FIB_ENTRY_FLAG_CONNECTED |
6413                                      FIB_ENTRY_FLAG_LOCAL),
6414                                     DPO_PROTO_IP4,
6415                                     NULL,
6416                                     tm->hw[0]->sw_if_index,
6417                                     ~0, // invalid fib index
6418                                     1,
6419                                     NULL,
6420                                     FIB_ROUTE_PATH_FLAG_NONE);
6421     fei = fib_table_lookup_exact_match(fib_index, &local0_pfx);
6422
6423     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
6424              "local interface route present");
6425
6426     fib_prefix_t local1_pfx = {
6427         .fp_len = 24,
6428         .fp_proto = FIB_PROTOCOL_IP4,
6429         .fp_addr = {
6430             .ip4 = {
6431                 /* 10.10.11.10 */
6432                 .as_u32 = clib_host_to_net_u32(0x0a0a0b0a),
6433             },
6434         },
6435     };
6436
6437     fib_table_bind (FIB_PROTOCOL_IP4, tm->hw[1]->sw_if_index, fib_index);
6438
6439     fib_table_entry_update_one_path(fib_index, &local1_pfx,
6440                                     FIB_SOURCE_INTERFACE,
6441                                     (FIB_ENTRY_FLAG_CONNECTED |
6442                                      FIB_ENTRY_FLAG_ATTACHED),
6443                                     DPO_PROTO_IP4,
6444                                     NULL,
6445                                     tm->hw[1]->sw_if_index,
6446                                     ~0,
6447                                     1,
6448                                     NULL,
6449                                     FIB_ROUTE_PATH_FLAG_NONE);
6450     fei = fib_table_lookup_exact_match(fib_index, &local1_pfx);
6451     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
6452              "attached interface route present");
6453
6454     local1_pfx.fp_len = 32;
6455     fib_table_entry_update_one_path(fib_index, &local1_pfx,
6456                                     FIB_SOURCE_INTERFACE,
6457                                     (FIB_ENTRY_FLAG_CONNECTED |
6458                                      FIB_ENTRY_FLAG_LOCAL),
6459                                     DPO_PROTO_IP4,
6460                                     NULL,
6461                                     tm->hw[1]->sw_if_index,
6462                                     ~0, // invalid fib index
6463                                     1,
6464                                     NULL,
6465                                     FIB_ROUTE_PATH_FLAG_NONE);
6466     fei = fib_table_lookup_exact_match(fib_index, &local1_pfx);
6467
6468     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
6469              "local interface route present");
6470
6471     ip46_address_t nh_10_10_10_1 = {
6472         .ip4 = {
6473             .as_u32 = clib_host_to_net_u32(0x0a0a0a01),
6474         },
6475     };
6476     ip46_address_t nh_10_10_11_1 = {
6477         .ip4 = {
6478             .as_u32 = clib_host_to_net_u32(0x0a0a0b01),
6479         },
6480     };
6481     ip46_address_t nh_10_10_11_2 = {
6482         .ip4 = {
6483             .as_u32 = clib_host_to_net_u32(0x0a0a0b02),
6484         },
6485     };
6486
6487     ai_v4_10_10_11_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6488                                            VNET_LINK_IP4,
6489                                            &nh_10_10_11_1,
6490                                            tm->hw[1]->sw_if_index);
6491     ai_v4_10_10_11_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6492                                            VNET_LINK_IP4,
6493                                            &nh_10_10_11_2,
6494                                            tm->hw[1]->sw_if_index);
6495     ai_mpls_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6496                                              VNET_LINK_MPLS,
6497                                              &nh_10_10_10_1,
6498                                              tm->hw[0]->sw_if_index);
6499     ai_mpls_10_10_11_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6500                                              VNET_LINK_MPLS,
6501                                              &nh_10_10_11_2,
6502                                              tm->hw[1]->sw_if_index);
6503     ai_mpls_10_10_11_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6504                                              VNET_LINK_MPLS,
6505                                              &nh_10_10_11_1,
6506                                              tm->hw[1]->sw_if_index);
6507
6508     /*
6509      * Add an etry with one path with a real out-going label
6510      */
6511     fib_prefix_t pfx_1_1_1_1_s_32 = {
6512         .fp_len = 32,
6513         .fp_proto = FIB_PROTOCOL_IP4,
6514         .fp_addr = {
6515             .ip4.as_u32 = clib_host_to_net_u32(0x01010101),
6516         },
6517     };
6518     fib_test_lb_bucket_t l99_eos_o_10_10_10_1 = {
6519         .type = FT_LB_LABEL_O_ADJ,
6520         .label_o_adj = {
6521             .adj = ai_mpls_10_10_10_1,
6522             .label = 99,
6523             .eos = MPLS_EOS,
6524         },
6525     };
6526     fib_test_lb_bucket_t l99_neos_o_10_10_10_1 = {
6527         .type = FT_LB_LABEL_O_ADJ,
6528         .label_o_adj = {
6529             .adj = ai_mpls_10_10_10_1,
6530             .label = 99,
6531             .eos = MPLS_NON_EOS,
6532         },
6533     };
6534     fib_mpls_label_t *l99 = NULL, fml99 = {
6535         .fml_value = 99,
6536     };
6537     vec_add1(l99, fml99);
6538
6539     fib_table_entry_update_one_path(fib_index,
6540                                     &pfx_1_1_1_1_s_32,
6541                                     FIB_SOURCE_API,
6542                                     FIB_ENTRY_FLAG_NONE,
6543                                     DPO_PROTO_IP4,
6544                                     &nh_10_10_10_1,
6545                                     tm->hw[0]->sw_if_index,
6546                                     ~0, // invalid fib index
6547                                     1,
6548                                     l99,
6549                                     FIB_ROUTE_PATH_FLAG_NONE);
6550
6551     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6552     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "1.1.1.1/32 created");
6553
6554     FIB_TEST(!fib_test_validate_entry(fei,
6555                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6556                                       1,
6557                                       &l99_eos_o_10_10_10_1),
6558              "1.1.1.1/32 LB 1 bucket via label 99 over 10.10.10.1");
6559
6560     /*
6561      * add a path with an implicit NULL label
6562      */
6563     fib_test_lb_bucket_t a_o_10_10_11_1 = {
6564         .type = FT_LB_ADJ,
6565         .adj = {
6566             .adj = ai_v4_10_10_11_1,
6567         },
6568     };
6569     fib_test_lb_bucket_t a_mpls_o_10_10_11_1 = {
6570         .type = FT_LB_ADJ,
6571         .adj = {
6572             .adj = ai_mpls_10_10_11_1,
6573         },
6574     };
6575     fib_mpls_label_t *l_imp_null = NULL, fml_imp_null = {
6576         .fml_value =  MPLS_IETF_IMPLICIT_NULL_LABEL,
6577     };
6578     vec_add1(l_imp_null, fml_imp_null);
6579
6580     fei = fib_table_entry_path_add(fib_index,
6581                                    &pfx_1_1_1_1_s_32,
6582                                    FIB_SOURCE_API,
6583                                    FIB_ENTRY_FLAG_NONE,
6584                                    DPO_PROTO_IP4,
6585                                    &nh_10_10_11_1,
6586                                    tm->hw[1]->sw_if_index,
6587                                    ~0, // invalid fib index
6588                                    1,
6589                                    l_imp_null,
6590                                    FIB_ROUTE_PATH_FLAG_NONE);
6591
6592     FIB_TEST(!fib_test_validate_entry(fei,
6593                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6594                                       2,
6595                                       &l99_eos_o_10_10_10_1,
6596                                       &a_o_10_10_11_1),
6597              "1.1.1.1/32 LB 2 buckets via: "
6598              "label 99 over 10.10.10.1, "
6599              "adj over 10.10.11.1");
6600
6601     /*
6602      * assign the route a local label
6603      */
6604     fib_table_entry_local_label_add(fib_index,
6605                                     &pfx_1_1_1_1_s_32,
6606                                     24001);
6607
6608     fib_prefix_t pfx_24001_eos = {
6609         .fp_proto = FIB_PROTOCOL_MPLS,
6610         .fp_label = 24001,
6611         .fp_eos = MPLS_EOS,
6612     };
6613     fib_prefix_t pfx_24001_neos = {
6614         .fp_proto = FIB_PROTOCOL_MPLS,
6615         .fp_label = 24001,
6616         .fp_eos = MPLS_NON_EOS,
6617     };
6618     fib_test_lb_bucket_t disp_o_10_10_11_1 = {
6619         .type = FT_LB_MPLS_DISP_PIPE_O_ADJ,
6620         .adj = {
6621             .adj = ai_v4_10_10_11_1,
6622         },
6623     };
6624
6625     /*
6626      * The EOS entry should link to both the paths,
6627      *  and use an ip adj for the imp-null
6628      * The NON-EOS entry should link to both the paths,
6629      *  and use an mpls adj for the imp-null
6630      */
6631     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6632                            &pfx_24001_eos);
6633     FIB_TEST(!fib_test_validate_entry(fei,
6634                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
6635                                       2,
6636                                       &l99_eos_o_10_10_10_1,
6637                                       &disp_o_10_10_11_1),
6638              "24001/eos LB 2 buckets via: "
6639              "label 99 over 10.10.10.1, "
6640              "mpls disp adj over 10.10.11.1");
6641
6642
6643     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6644                            &pfx_24001_neos);
6645     FIB_TEST(!fib_test_validate_entry(fei,
6646                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6647                                       2,
6648                                       &l99_neos_o_10_10_10_1,
6649                                       &a_mpls_o_10_10_11_1),
6650              "24001/neos LB 1 bucket via: "
6651              "label 99 over 10.10.10.1 ",
6652              "mpls-adj via 10.10.11.1");
6653
6654     /*
6655      * add an unlabelled path, this is excluded from the neos chains,
6656      */
6657     fib_test_lb_bucket_t adj_o_10_10_11_2 = {
6658         .type = FT_LB_ADJ,
6659         .adj = {
6660             .adj = ai_v4_10_10_11_2,
6661         },
6662     };
6663     fib_test_lb_bucket_t disp_o_10_10_11_2 = {
6664         .type = FT_LB_MPLS_DISP_PIPE_O_ADJ,
6665         .adj = {
6666             .adj = ai_v4_10_10_11_2,
6667         },
6668     };
6669
6670
6671     fei = fib_table_entry_path_add(fib_index,
6672                                    &pfx_1_1_1_1_s_32,
6673                                    FIB_SOURCE_API,
6674                                    FIB_ENTRY_FLAG_NONE,
6675                                    DPO_PROTO_IP4,
6676                                    &nh_10_10_11_2,
6677                                    tm->hw[1]->sw_if_index,
6678                                    ~0, // invalid fib index
6679                                    1,
6680                                    NULL,
6681                                    FIB_ROUTE_PATH_FLAG_NONE);
6682
6683     FIB_TEST(!fib_test_validate_entry(fei,
6684                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6685                                       16, // 3 choices spread over 16 buckets
6686                                       &l99_eos_o_10_10_10_1,
6687                                       &l99_eos_o_10_10_10_1,
6688                                       &l99_eos_o_10_10_10_1,
6689                                       &l99_eos_o_10_10_10_1,
6690                                       &l99_eos_o_10_10_10_1,
6691                                       &l99_eos_o_10_10_10_1,
6692                                       &a_o_10_10_11_1,
6693                                       &a_o_10_10_11_1,
6694                                       &a_o_10_10_11_1,
6695                                       &a_o_10_10_11_1,
6696                                       &a_o_10_10_11_1,
6697                                       &adj_o_10_10_11_2,
6698                                       &adj_o_10_10_11_2,
6699                                       &adj_o_10_10_11_2,
6700                                       &adj_o_10_10_11_2,
6701                                       &adj_o_10_10_11_2),
6702              "1.1.1.1/32 LB 16 buckets via: "
6703              "label 99 over 10.10.10.1, "
6704              "adj over 10.10.11.1",
6705              "adj over 10.10.11.2");
6706
6707     /*
6708      * get and lock a reference to the non-eos of the via entry 1.1.1.1/32
6709      */
6710     dpo_id_t non_eos_1_1_1_1 = DPO_INVALID;
6711     fib_entry_contribute_forwarding(fei,
6712                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6713                                     &non_eos_1_1_1_1);
6714
6715     /*
6716      * n-eos has only the 2 labelled paths
6717      */
6718     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6719                            &pfx_24001_neos);
6720
6721     FIB_TEST(!fib_test_validate_entry(fei,
6722                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6723                                       2,
6724                                       &l99_neos_o_10_10_10_1,
6725                                       &a_mpls_o_10_10_11_1),
6726              "24001/neos LB 2 buckets via: "
6727              "label 99 over 10.10.10.1, "
6728              "adj-mpls over 10.10.11.2");
6729
6730     /*
6731      * A labelled recursive
6732      */
6733     fib_prefix_t pfx_2_2_2_2_s_32 = {
6734         .fp_len = 32,
6735         .fp_proto = FIB_PROTOCOL_IP4,
6736         .fp_addr = {
6737             .ip4.as_u32 = clib_host_to_net_u32(0x02020202),
6738         },
6739     };
6740     fib_test_lb_bucket_t l1600_eos_o_1_1_1_1 = {
6741         .type = FT_LB_LABEL_O_LB,
6742         .label_o_lb = {
6743             .lb = non_eos_1_1_1_1.dpoi_index,
6744             .label = 1600,
6745             .eos = MPLS_EOS,
6746             .mode = FIB_MPLS_LSP_MODE_UNIFORM,
6747         },
6748     };
6749     fib_mpls_label_t *l1600 = NULL, fml1600 = {
6750         .fml_value = 1600,
6751         .fml_mode = FIB_MPLS_LSP_MODE_UNIFORM,
6752     };
6753     vec_add1(l1600, fml1600);
6754
6755     fei = fib_table_entry_update_one_path(fib_index,
6756                                           &pfx_2_2_2_2_s_32,
6757                                           FIB_SOURCE_API,
6758                                           FIB_ENTRY_FLAG_NONE,
6759                                           DPO_PROTO_IP4,
6760                                           &pfx_1_1_1_1_s_32.fp_addr,
6761                                           ~0,
6762                                           fib_index,
6763                                           1,
6764                                           l1600,
6765                                           FIB_ROUTE_PATH_FLAG_NONE);
6766
6767     FIB_TEST(!fib_test_validate_entry(fei,
6768                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6769                                       1,
6770                                       &l1600_eos_o_1_1_1_1),
6771              "2.2.2.2.2/32 LB 1 buckets via: "
6772              "label 1600 over 1.1.1.1");
6773
6774     dpo_id_t dpo_44 = DPO_INVALID;
6775     index_t urpfi;
6776
6777     fib_entry_contribute_forwarding(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, &dpo_44);
6778     urpfi = load_balance_get_urpf(dpo_44.dpoi_index);
6779
6780     FIB_TEST(fib_urpf_check(urpfi, tm->hw[0]->sw_if_index),
6781              "uRPF check for 2.2.2.2/32 on %d OK",
6782              tm->hw[0]->sw_if_index);
6783     FIB_TEST(fib_urpf_check(urpfi, tm->hw[1]->sw_if_index),
6784              "uRPF check for 2.2.2.2/32 on %d OK",
6785              tm->hw[1]->sw_if_index);
6786     FIB_TEST(!fib_urpf_check(urpfi, 99),
6787              "uRPF check for 2.2.2.2/32 on 99 not-OK",
6788              99);
6789
6790     fib_entry_contribute_forwarding(fei, FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS, &dpo_44);
6791     FIB_TEST(urpfi == load_balance_get_urpf(dpo_44.dpoi_index),
6792              "Shared uRPF on IP and non-EOS chain");
6793
6794     dpo_reset(&dpo_44);
6795
6796     /*
6797      * we are holding a lock on the non-eos LB of the via-entry.
6798      * do a PIC-core failover by shutting the link of the via-entry.
6799      *
6800      * shut down the link with the valid label
6801      */
6802     vnet_sw_interface_set_flags(vnet_get_main(),
6803                                 tm->hw[0]->sw_if_index,
6804                                 0);
6805
6806     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6807     FIB_TEST(!fib_test_validate_entry(fei,
6808                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6809                                       2,
6810                                       &a_o_10_10_11_1,
6811                                       &adj_o_10_10_11_2),
6812              "1.1.1.1/32 LB 2 buckets via: "
6813              "adj over 10.10.11.1, ",
6814              "adj-v4 over 10.10.11.2");
6815
6816     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6817                            &pfx_24001_eos);
6818     FIB_TEST(!fib_test_validate_entry(fei,
6819                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
6820                                       2,
6821                                       &disp_o_10_10_11_1,
6822                                       &disp_o_10_10_11_2),
6823              "24001/eos LB 2 buckets via: "
6824              "mpls-disp adj over 10.10.11.1, ",
6825              "mpls-disp adj-v4 over 10.10.11.2");
6826
6827     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6828                            &pfx_24001_neos);
6829     FIB_TEST(!fib_test_validate_entry(fei,
6830                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6831                                       1,
6832                                       &a_mpls_o_10_10_11_1),
6833              "24001/neos LB 1 buckets via: "
6834              "adj-mpls over 10.10.11.2");
6835
6836     /*
6837      * test that the pre-failover load-balance has been in-place
6838      * modified
6839      */
6840     dpo_id_t current = DPO_INVALID;
6841     fib_entry_contribute_forwarding(fei,
6842                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6843                                     &current);
6844
6845     FIB_TEST(!dpo_cmp(&non_eos_1_1_1_1,
6846                       &current),
6847              "PIC-core LB inplace modified %U %U",
6848              format_dpo_id, &non_eos_1_1_1_1, 0,
6849              format_dpo_id, &current, 0);
6850
6851     dpo_reset(&non_eos_1_1_1_1);
6852     dpo_reset(&current);
6853
6854     /*
6855      * no-shut the link with the valid label
6856      */
6857     vnet_sw_interface_set_flags(vnet_get_main(),
6858                                 tm->hw[0]->sw_if_index,
6859                                 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
6860
6861     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6862     FIB_TEST(!fib_test_validate_entry(fei,
6863                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6864                                       16, // 3 choices spread over 16 buckets
6865                                       &l99_eos_o_10_10_10_1,
6866                                       &l99_eos_o_10_10_10_1,
6867                                       &l99_eos_o_10_10_10_1,
6868                                       &l99_eos_o_10_10_10_1,
6869                                       &l99_eos_o_10_10_10_1,
6870                                       &l99_eos_o_10_10_10_1,
6871                                       &a_o_10_10_11_1,
6872                                       &a_o_10_10_11_1,
6873                                       &a_o_10_10_11_1,
6874                                       &a_o_10_10_11_1,
6875                                       &a_o_10_10_11_1,
6876                                       &adj_o_10_10_11_2,
6877                                       &adj_o_10_10_11_2,
6878                                       &adj_o_10_10_11_2,
6879                                       &adj_o_10_10_11_2,
6880                                       &adj_o_10_10_11_2),
6881              "1.1.1.1/32 LB 16 buckets via: "
6882              "label 99 over 10.10.10.1, "
6883              "adj over 10.10.11.1",
6884              "adj-v4 over 10.10.11.2");
6885
6886
6887     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6888                            &pfx_24001_eos);
6889     FIB_TEST(!fib_test_validate_entry(fei,
6890                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
6891                                       16, // 3 choices spread over 16 buckets
6892                                       &l99_eos_o_10_10_10_1,
6893                                       &l99_eos_o_10_10_10_1,
6894                                       &l99_eos_o_10_10_10_1,
6895                                       &l99_eos_o_10_10_10_1,
6896                                       &l99_eos_o_10_10_10_1,
6897                                       &l99_eos_o_10_10_10_1,
6898                                       &disp_o_10_10_11_1,
6899                                       &disp_o_10_10_11_1,
6900                                       &disp_o_10_10_11_1,
6901                                       &disp_o_10_10_11_1,
6902                                       &disp_o_10_10_11_1,
6903                                       &disp_o_10_10_11_2,
6904                                       &disp_o_10_10_11_2,
6905                                       &disp_o_10_10_11_2,
6906                                       &disp_o_10_10_11_2,
6907                                       &disp_o_10_10_11_2),
6908              "24001/eos LB 16 buckets via: "
6909              "label 99 over 10.10.10.1, "
6910              "MPLS disp adj over 10.10.11.1",
6911              "MPLS disp adj-v4 over 10.10.11.2");
6912
6913     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6914                            &pfx_24001_neos);
6915     FIB_TEST(!fib_test_validate_entry(fei,
6916                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6917                                       2,
6918                                       &l99_neos_o_10_10_10_1,
6919                                       &a_mpls_o_10_10_11_1),
6920              "24001/neos LB 2 buckets via: "
6921              "label 99 over 10.10.10.1, "
6922              "adj-mpls over 10.10.11.2");
6923
6924     /*
6925      * remove the first path with the valid label
6926      */
6927     fib_table_entry_path_remove(fib_index,
6928                                 &pfx_1_1_1_1_s_32,
6929                                 FIB_SOURCE_API,
6930                                 DPO_PROTO_IP4,
6931                                 &nh_10_10_10_1,
6932                                 tm->hw[0]->sw_if_index,
6933                                 ~0, // invalid fib index
6934                                 1,
6935                                 FIB_ROUTE_PATH_FLAG_NONE);
6936
6937     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6938     FIB_TEST(!fib_test_validate_entry(fei,
6939                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6940                                       2,
6941                                       &a_o_10_10_11_1,
6942                                       &adj_o_10_10_11_2),
6943              "1.1.1.1/32 LB 2 buckets via: "
6944              "adj over 10.10.11.1, "
6945              "adj-v4 over 10.10.11.2");
6946
6947     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6948                            &pfx_24001_eos);
6949     FIB_TEST(!fib_test_validate_entry(fei,
6950                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
6951                                       2,
6952                                       &disp_o_10_10_11_1,
6953                                       &disp_o_10_10_11_2),
6954              "24001/eos LB 2 buckets via: "
6955              "MPLS disp adj over 10.10.11.1, "
6956              "MPLS disp adj-v4 over 10.10.11.2");
6957
6958     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6959                            &pfx_24001_neos);
6960
6961     FIB_TEST(!fib_test_validate_entry(fei,
6962                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6963                                       1,
6964                                       &a_mpls_o_10_10_11_1),
6965              "24001/neos LB 1 buckets via: "
6966              "adj-mpls over 10.10.11.2");
6967
6968     /*
6969      * remove the other path with a valid label
6970      */
6971     fib_test_lb_bucket_t bucket_drop = {
6972         .type = FT_LB_DROP,
6973     };
6974     fib_test_lb_bucket_t mpls_bucket_drop = {
6975         .type = FT_LB_DROP,
6976         .special = {
6977             .adj = DPO_PROTO_MPLS,
6978         },
6979     };
6980
6981     fib_table_entry_path_remove(fib_index,
6982                                 &pfx_1_1_1_1_s_32,
6983                                 FIB_SOURCE_API,
6984                                 DPO_PROTO_IP4,
6985                                 &nh_10_10_11_1,
6986                                 tm->hw[1]->sw_if_index,
6987                                 ~0, // invalid fib index
6988                                 1,
6989                                 FIB_ROUTE_PATH_FLAG_NONE);
6990
6991     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6992     FIB_TEST(!fib_test_validate_entry(fei,
6993                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6994                                       1,
6995                                       &adj_o_10_10_11_2),
6996              "1.1.1.1/32 LB 1 buckets via: "
6997              "adj over 10.10.11.2");
6998
6999     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7000                            &pfx_24001_eos);
7001     FIB_TEST(!fib_test_validate_entry(fei,
7002                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
7003                                       1,
7004                                       &disp_o_10_10_11_2),
7005              "24001/eos LB 1 buckets via: "
7006              "MPLS disp adj over 10.10.11.2");
7007
7008     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7009                            &pfx_24001_neos);
7010     FIB_TEST(!fib_test_validate_entry(fei,
7011                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
7012                                       1,
7013                                       &mpls_bucket_drop),
7014              "24001/neos LB 1 buckets via: DROP");
7015
7016     /*
7017      * add back the path with the valid label
7018      */
7019     l99 = NULL;
7020     vec_add1(l99, fml99);
7021
7022     fib_table_entry_path_add(fib_index,
7023                              &pfx_1_1_1_1_s_32,
7024                              FIB_SOURCE_API,
7025                              FIB_ENTRY_FLAG_NONE,
7026                              DPO_PROTO_IP4,
7027                              &nh_10_10_10_1,
7028                              tm->hw[0]->sw_if_index,
7029                              ~0, // invalid fib index
7030                              1,
7031                              l99,
7032                              FIB_ROUTE_PATH_FLAG_NONE);
7033
7034     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
7035     FIB_TEST(!fib_test_validate_entry(fei,
7036                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7037                                       2,
7038                                       &l99_eos_o_10_10_10_1,
7039                                       &adj_o_10_10_11_2),
7040              "1.1.1.1/32 LB 2 buckets via: "
7041              "label 99 over 10.10.10.1, "
7042              "adj over 10.10.11.2");
7043
7044     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7045                            &pfx_24001_eos);
7046     FIB_TEST(!fib_test_validate_entry(fei,
7047                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
7048                                       2,
7049                                       &l99_eos_o_10_10_10_1,
7050                                       &disp_o_10_10_11_2),
7051              "24001/eos LB 2 buckets via: "
7052              "label 99 over 10.10.10.1, "
7053              "MPLS disp adj over 10.10.11.2");
7054
7055     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7056                            &pfx_24001_neos);
7057     FIB_TEST(!fib_test_validate_entry(fei,
7058                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
7059                                       1,
7060                                       &l99_neos_o_10_10_10_1),
7061              "24001/neos LB 1 buckets via: "
7062              "label 99 over 10.10.10.1");
7063
7064     /*
7065      * change the local label
7066      */
7067     fib_table_entry_local_label_add(fib_index,
7068                                     &pfx_1_1_1_1_s_32,
7069                                     25005);
7070
7071     fib_prefix_t pfx_25005_eos = {
7072         .fp_proto = FIB_PROTOCOL_MPLS,
7073         .fp_label = 25005,
7074         .fp_eos = MPLS_EOS,
7075     };
7076     fib_prefix_t pfx_25005_neos = {
7077         .fp_proto = FIB_PROTOCOL_MPLS,
7078         .fp_label = 25005,
7079         .fp_eos = MPLS_NON_EOS,
7080     };
7081
7082     FIB_TEST((FIB_NODE_INDEX_INVALID ==
7083               fib_table_lookup(fib_index, &pfx_24001_eos)),
7084              "24001/eos removed after label change");
7085     FIB_TEST((FIB_NODE_INDEX_INVALID ==
7086               fib_table_lookup(fib_index, &pfx_24001_neos)),
7087              "24001/eos removed after label change");
7088
7089     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7090                            &pfx_25005_eos);
7091     FIB_TEST(!fib_test_validate_entry(fei,
7092                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
7093                                       2,
7094                                       &l99_eos_o_10_10_10_1,
7095                                       &disp_o_10_10_11_2),
7096              "25005/eos LB 2 buckets via: "
7097              "label 99 over 10.10.10.1, "
7098              "MPLS disp adj over 10.10.11.2");
7099
7100     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7101                            &pfx_25005_neos);
7102     FIB_TEST(!fib_test_validate_entry(fei,
7103                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
7104                                       1,
7105                                       &l99_neos_o_10_10_10_1),
7106              "25005/neos LB 1 buckets via: "
7107              "label 99 over 10.10.10.1");
7108
7109     /*
7110      * remove the local label.
7111      * the check that the MPLS entries are gone is done by the fact the
7112      * MPLS table is no longer present.
7113      */
7114     fib_table_entry_local_label_remove(fib_index,
7115                                        &pfx_1_1_1_1_s_32,
7116                                        25005);
7117
7118     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
7119     FIB_TEST(!fib_test_validate_entry(fei,
7120                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7121                                       2,
7122                                       &l99_eos_o_10_10_10_1,
7123                                       &adj_o_10_10_11_2),
7124              "24001/eos LB 2 buckets via: "
7125              "label 99 over 10.10.10.1, "
7126              "adj over 10.10.11.2");
7127
7128     FIB_TEST((FIB_NODE_INDEX_INVALID ==
7129               mpls_fib_index_from_table_id(MPLS_FIB_DEFAULT_TABLE_ID)),
7130              "No more MPLS FIB entries => table removed");
7131
7132     /*
7133      * add another via-entry for the recursive
7134      */
7135     fib_prefix_t pfx_1_1_1_2_s_32 = {
7136         .fp_len = 32,
7137         .fp_proto = FIB_PROTOCOL_IP4,
7138         .fp_addr = {
7139             .ip4.as_u32 = clib_host_to_net_u32(0x01010102),
7140         },
7141     };
7142     fib_test_lb_bucket_t l101_eos_o_10_10_10_1 = {
7143         .type = FT_LB_LABEL_O_ADJ,
7144         .label_o_adj = {
7145             .adj = ai_mpls_10_10_10_1,
7146             .label = 101,
7147             .eos = MPLS_EOS,
7148         },
7149     };
7150     fib_mpls_label_t *l101 = NULL, fml101 = {
7151         .fml_value = 101,
7152     };
7153     vec_add1(l101, fml101);
7154
7155     fei = fib_table_entry_update_one_path(fib_index,
7156                                           &pfx_1_1_1_2_s_32,
7157                                           FIB_SOURCE_API,
7158                                           FIB_ENTRY_FLAG_NONE,
7159                                           DPO_PROTO_IP4,
7160                                           &nh_10_10_10_1,
7161                                           tm->hw[0]->sw_if_index,
7162                                           ~0, // invalid fib index
7163                                           1,
7164                                           l101,
7165                                           FIB_ROUTE_PATH_FLAG_NONE);
7166
7167     FIB_TEST(!fib_test_validate_entry(fei,
7168                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7169                                       1,
7170                                       &l101_eos_o_10_10_10_1),
7171              "1.1.1.2/32 LB 1 buckets via: "
7172              "label 101 over 10.10.10.1");
7173
7174     dpo_id_t non_eos_1_1_1_2 = DPO_INVALID;
7175     fib_entry_contribute_forwarding(fib_table_lookup(fib_index,
7176                                                      &pfx_1_1_1_1_s_32),
7177                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
7178                                     &non_eos_1_1_1_1);
7179     fib_entry_contribute_forwarding(fib_table_lookup(fib_index,
7180                                                      &pfx_1_1_1_2_s_32),
7181                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
7182                                     &non_eos_1_1_1_2);
7183
7184     fib_test_lb_bucket_t l1601_eos_o_1_1_1_2 = {
7185         .type = FT_LB_LABEL_O_LB,
7186         .label_o_lb = {
7187             .lb = non_eos_1_1_1_2.dpoi_index,
7188             .label = 1601,
7189             .eos = MPLS_EOS,
7190         },
7191     };
7192     fib_mpls_label_t *l1601 = NULL, fml1601 = {
7193         .fml_value = 1601,
7194     };
7195     vec_add1(l1601, fml1601);
7196
7197     l1600_eos_o_1_1_1_1.label_o_lb.lb = non_eos_1_1_1_1.dpoi_index;
7198
7199     fei = fib_table_entry_path_add(fib_index,
7200                                    &pfx_2_2_2_2_s_32,
7201                                    FIB_SOURCE_API,
7202                                    FIB_ENTRY_FLAG_NONE,
7203                                    DPO_PROTO_IP4,
7204                                    &pfx_1_1_1_2_s_32.fp_addr,
7205                                    ~0,
7206                                    fib_index,
7207                                    1,
7208                                    l1601,
7209                                    FIB_ROUTE_PATH_FLAG_NONE);
7210
7211     FIB_TEST(!fib_test_validate_entry(fei,
7212                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7213                                       2,
7214                                       &l1600_eos_o_1_1_1_1,
7215                                       &l1601_eos_o_1_1_1_2),
7216              "2.2.2.2/32 LB 2 buckets via: "
7217              "label 1600 via 1.1,1.1, "
7218              "label 16001 via 1.1.1.2");
7219
7220     /*
7221      * update the via-entry so it no longer has an imp-null path.
7222      * the LB for the recursive can use an imp-null
7223      */
7224     l_imp_null = NULL;
7225     vec_add1(l_imp_null, fml_imp_null);
7226
7227     fei = fib_table_entry_update_one_path(fib_index,
7228                                           &pfx_1_1_1_2_s_32,
7229                                           FIB_SOURCE_API,
7230                                           FIB_ENTRY_FLAG_NONE,
7231                                           DPO_PROTO_IP4,
7232                                           &nh_10_10_11_1,
7233                                           tm->hw[1]->sw_if_index,
7234                                           ~0, // invalid fib index
7235                                           1,
7236                                           l_imp_null,
7237                                           FIB_ROUTE_PATH_FLAG_NONE);
7238
7239     FIB_TEST(!fib_test_validate_entry(fei,
7240                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7241                                       1,
7242                                       &a_o_10_10_11_1),
7243              "1.1.1.2/32 LB 1 buckets via: "
7244              "adj 10.10.11.1");
7245
7246     fei = fib_table_lookup(fib_index, &pfx_2_2_2_2_s_32);
7247     FIB_TEST(!fib_test_validate_entry(fei,
7248                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7249                                       2,
7250                                       &l1600_eos_o_1_1_1_1,
7251                                       &l1601_eos_o_1_1_1_2),
7252              "2.2.2.2/32 LB 2 buckets via: "
7253              "label 1600 via 1.1,1.1, "
7254              "label 16001 via 1.1.1.2");
7255
7256     /*
7257      * update the via-entry so it no longer has labelled paths.
7258      * the LB for the recursive should exclue this via form its LB
7259      */
7260     fei = fib_table_entry_update_one_path(fib_index,
7261                                           &pfx_1_1_1_2_s_32,
7262                                           FIB_SOURCE_API,
7263                                           FIB_ENTRY_FLAG_NONE,
7264                                           DPO_PROTO_IP4,
7265                                           &nh_10_10_11_1,
7266                                           tm->hw[1]->sw_if_index,
7267                                           ~0, // invalid fib index
7268                                           1,
7269                                           NULL,
7270                                           FIB_ROUTE_PATH_FLAG_NONE);
7271
7272     FIB_TEST(!fib_test_validate_entry(fei,
7273                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7274                                       1,
7275                                       &a_o_10_10_11_1),
7276              "1.1.1.2/32 LB 1 buckets via: "
7277              "adj 10.10.11.1");
7278
7279     fei = fib_table_lookup(fib_index, &pfx_2_2_2_2_s_32);
7280     FIB_TEST(!fib_test_validate_entry(fei,
7281                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7282                                       1,
7283                                       &l1600_eos_o_1_1_1_1),
7284              "2.2.2.2/32 LB 1 buckets via: "
7285              "label 1600 via 1.1,1.1");
7286
7287     dpo_reset(&non_eos_1_1_1_1);
7288     dpo_reset(&non_eos_1_1_1_2);
7289
7290     /*
7291      * Add a recursive with no out-labels. We expect to use the IP of the via
7292      */
7293     fib_prefix_t pfx_2_2_2_3_s_32 = {
7294         .fp_len = 32,
7295         .fp_proto = FIB_PROTOCOL_IP4,
7296         .fp_addr = {
7297             .ip4.as_u32 = clib_host_to_net_u32(0x02020203),
7298         },
7299     };
7300     dpo_id_t ip_1_1_1_1 = DPO_INVALID;
7301
7302     fib_table_entry_update_one_path(fib_index,
7303                                     &pfx_2_2_2_3_s_32,
7304                                     FIB_SOURCE_API,
7305                                     FIB_ENTRY_FLAG_NONE,
7306                                     DPO_PROTO_IP4,
7307                                     &pfx_1_1_1_1_s_32.fp_addr,
7308                                     ~0,
7309                                     fib_index,
7310                                     1,
7311                                     NULL,
7312                                     FIB_ROUTE_PATH_FLAG_NONE);
7313
7314     fib_entry_contribute_forwarding(fib_table_lookup(fib_index,
7315                                                      &pfx_1_1_1_1_s_32),
7316                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7317                                     &ip_1_1_1_1);
7318
7319     fib_test_lb_bucket_t ip_o_1_1_1_1 = {
7320         .type = FT_LB_O_LB,
7321         .lb = {
7322             .lb = ip_1_1_1_1.dpoi_index,
7323         },
7324     };
7325
7326     fei = fib_table_lookup(fib_index, &pfx_2_2_2_3_s_32);
7327     FIB_TEST(!fib_test_validate_entry(fei,
7328                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7329                                       1,
7330                                       &ip_o_1_1_1_1),
7331              "2.2.2.2.3/32 LB 1 buckets via: "
7332              "ip 1.1.1.1");
7333
7334     /*
7335      * Add a recursive with an imp-null out-label.
7336      * We expect to use the IP of the via
7337      */
7338     fib_prefix_t pfx_2_2_2_4_s_32 = {
7339         .fp_len = 32,
7340         .fp_proto = FIB_PROTOCOL_IP4,
7341         .fp_addr = {
7342             .ip4.as_u32 = clib_host_to_net_u32(0x02020204),
7343         },
7344     };
7345
7346     fib_table_entry_update_one_path(fib_index,
7347                                     &pfx_2_2_2_4_s_32,
7348                                     FIB_SOURCE_API,
7349                                     FIB_ENTRY_FLAG_NONE,
7350                                     DPO_PROTO_IP4,
7351                                     &pfx_1_1_1_1_s_32.fp_addr,
7352                                     ~0,
7353                                     fib_index,
7354                                     1,
7355                                     NULL,
7356                                     FIB_ROUTE_PATH_FLAG_NONE);
7357
7358     fei = fib_table_lookup(fib_index, &pfx_2_2_2_4_s_32);
7359     FIB_TEST(!fib_test_validate_entry(fei,
7360                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7361                                       1,
7362                                       &ip_o_1_1_1_1),
7363              "2.2.2.2.4/32 LB 1 buckets via: "
7364              "ip 1.1.1.1");
7365
7366     dpo_reset(&ip_1_1_1_1);
7367
7368     /*
7369      * Create an entry with a deep label stack
7370      */
7371     fib_prefix_t pfx_2_2_5_5_s_32 = {
7372         .fp_len = 32,
7373         .fp_proto = FIB_PROTOCOL_IP4,
7374         .fp_addr = {
7375             .ip4.as_u32 = clib_host_to_net_u32(0x02020505),
7376         },
7377     };
7378     fib_test_lb_bucket_t ls_eos_o_10_10_10_1 = {
7379         .type = FT_LB_LABEL_STACK_O_ADJ,
7380         .label_stack_o_adj = {
7381             .adj = ai_mpls_10_10_11_1,
7382             .label_stack_size = 8,
7383             .label_stack = {
7384                 200, 201, 202, 203, 204, 205, 206, 207
7385             },
7386             .eos = MPLS_EOS,
7387         },
7388     };
7389     fib_mpls_label_t *label_stack = NULL;
7390     vec_validate(label_stack, 7);
7391     for (ii = 0; ii < 8; ii++)
7392     {
7393         label_stack[ii].fml_value = ii + 200;
7394     }
7395
7396     fei = fib_table_entry_update_one_path(fib_index,
7397                                           &pfx_2_2_5_5_s_32,
7398                                           FIB_SOURCE_API,
7399                                           FIB_ENTRY_FLAG_NONE,
7400                                           DPO_PROTO_IP4,
7401                                           &nh_10_10_11_1,
7402                                           tm->hw[1]->sw_if_index,
7403                                           ~0, // invalid fib index
7404                                           1,
7405                                           label_stack,
7406                                           FIB_ROUTE_PATH_FLAG_NONE);
7407
7408     FIB_TEST(!fib_test_validate_entry(fei,
7409                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7410                                       1,
7411                                       &ls_eos_o_10_10_10_1),
7412              "2.2.5.5/32 LB 1 buckets via: "
7413              "adj 10.10.11.1");
7414     fib_table_entry_delete_index(fei, FIB_SOURCE_API);
7415
7416     /*
7417      * A prefix with outgoing labels. We'll RR source a /32 it covers
7418      * and test that the RR source picks up the out-going labels
7419      */
7420     fib_prefix_t pfx_100_s_8 = {
7421         .fp_len = 8,
7422         .fp_proto = FIB_PROTOCOL_IP4,
7423         .fp_addr = {
7424             .ip4.as_u32 = clib_host_to_net_u32(0x64000000),
7425         },
7426     };
7427     fib_test_lb_bucket_t l_100_eos_o_10_10_10_1 = {
7428         .type = FT_LB_LABEL_O_ADJ,
7429         .label_o_adj = {
7430             .adj = ai_mpls_10_10_11_1,
7431             .label = 1602,
7432             .eos = MPLS_EOS,
7433         },
7434     };
7435     fib_mpls_label_t *l1602 = NULL, fml1602 = {
7436         .fml_value = 1602,
7437     };
7438     vec_add1(l1602, fml1602);
7439     fei = fib_table_entry_update_one_path(fib_index,
7440                                           &pfx_100_s_8,
7441                                           FIB_SOURCE_API,
7442                                           FIB_ENTRY_FLAG_NONE,
7443                                           DPO_PROTO_IP4,
7444                                           &nh_10_10_11_1,
7445                                           tm->hw[1]->sw_if_index,
7446                                           ~0, // invalid fib index
7447                                           1,
7448                                           l1602,
7449                                           FIB_ROUTE_PATH_FLAG_NONE);
7450
7451     FIB_TEST(!fib_test_validate_entry(fei,
7452                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7453                                       1,
7454                                       &l_100_eos_o_10_10_10_1),
7455              "100.0.0.0/8 LB 1 buckets via: lbl 101 "
7456              "adj 10.10.11.1");
7457
7458     fib_prefix_t pfx_100_1_1_1_s_32 = {
7459         .fp_len = 32,
7460         .fp_proto = FIB_PROTOCOL_IP4,
7461         .fp_addr = {
7462             .ip4.as_u32 = clib_host_to_net_u32(0x64010101),
7463         },
7464     };
7465
7466     fei = fib_table_entry_special_add(fib_index,
7467                                       &pfx_100_1_1_1_s_32,
7468                                       FIB_SOURCE_RR,
7469                                       FIB_ENTRY_FLAG_NONE);
7470
7471     FIB_TEST(!fib_test_validate_entry(fei,
7472                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7473                                       1,
7474                                       &l_100_eos_o_10_10_10_1),
7475              "100.1.1.1/32 LB 1 buckets via: "
7476              "adj 10.10.11.1");
7477
7478     fib_table_entry_delete(fib_index,
7479                            &pfx_100_s_8,
7480                            FIB_SOURCE_API);
7481     fib_table_entry_delete_index(fei, FIB_SOURCE_RR);
7482
7483     /*
7484      * cleanup
7485      */
7486     fib_table_entry_delete(fib_index,
7487                            &pfx_1_1_1_2_s_32,
7488                            FIB_SOURCE_API);
7489
7490     fei = fib_table_lookup(fib_index, &pfx_2_2_2_2_s_32);
7491     FIB_TEST(!fib_test_validate_entry(fei,
7492                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7493                                       1,
7494                                       &l1600_eos_o_1_1_1_1),
7495              "2.2.2.2/32 LB 1 buckets via: "
7496              "label 1600 via 1.1,1.1");
7497
7498     fib_table_entry_delete(fib_index,
7499                            &pfx_1_1_1_1_s_32,
7500                            FIB_SOURCE_API);
7501
7502     FIB_TEST(!fib_test_validate_entry(fei,
7503                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7504                                       1,
7505                                       &bucket_drop),
7506              "2.2.2.2/32 LB 1 buckets via: DROP");
7507
7508     fib_table_entry_delete(fib_index,
7509                            &pfx_2_2_2_2_s_32,
7510                            FIB_SOURCE_API);
7511     fib_table_entry_delete(fib_index,
7512                            &pfx_2_2_2_3_s_32,
7513                            FIB_SOURCE_API);
7514     fib_table_entry_delete(fib_index,
7515                            &pfx_2_2_2_4_s_32,
7516                            FIB_SOURCE_API);
7517
7518     adj_unlock(ai_mpls_10_10_10_1);
7519     adj_unlock(ai_mpls_10_10_11_2);
7520     adj_unlock(ai_v4_10_10_11_1);
7521     adj_unlock(ai_v4_10_10_11_2);
7522     adj_unlock(ai_mpls_10_10_11_1);
7523
7524     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
7525              adj_nbr_db_size());
7526
7527     local0_pfx.fp_len = 32;
7528     fib_table_entry_delete(fib_index,
7529                            &local0_pfx,
7530                            FIB_SOURCE_INTERFACE);
7531     local0_pfx.fp_len = 24;
7532     fib_table_entry_delete(fib_index,
7533                            &local0_pfx,
7534                            FIB_SOURCE_INTERFACE);
7535     local1_pfx.fp_len = 32;
7536     fib_table_entry_delete(fib_index,
7537                            &local1_pfx,
7538                            FIB_SOURCE_INTERFACE);
7539     local1_pfx.fp_len = 24;
7540     fib_table_entry_delete(fib_index,
7541                            &local1_pfx,
7542                            FIB_SOURCE_INTERFACE);
7543
7544     /*
7545      * +1 for the drop LB in the MPLS tables.
7546      */
7547     FIB_TEST(lb_count+1 == pool_elts(load_balance_pool),
7548              "Load-balance resources freed %d of %d",
7549              lb_count+1, pool_elts(load_balance_pool));
7550
7551     return (res);
7552 }
7553
7554 #define N_TEST_CHILDREN 4
7555 #define PARENT_INDEX 0
7556
7557 typedef struct fib_node_test_t_
7558 {
7559     fib_node_t node;
7560     u32 sibling;
7561     u32 index;
7562     fib_node_back_walk_ctx_t *ctxs;
7563     u32 destroyed;
7564 } fib_node_test_t;
7565
7566 static fib_node_test_t fib_test_nodes[N_TEST_CHILDREN+1];
7567
7568 #define PARENT() (&fib_test_nodes[PARENT_INDEX].node)
7569
7570 #define FOR_EACH_TEST_CHILD(_tc)                \
7571     for (ii = 1, (_tc) = &fib_test_nodes[1];    \
7572          ii < N_TEST_CHILDREN+1;                \
7573          ii++, (_tc) = &fib_test_nodes[ii])
7574
7575 static fib_node_t *
7576 fib_test_child_get_node (fib_node_index_t index)
7577 {
7578     return (&fib_test_nodes[index].node);
7579 }
7580
7581 static int fib_test_walk_spawns_walks;
7582 static fib_node_type_t test_node_type;
7583
7584 static fib_node_back_walk_rc_t
7585 fib_test_child_back_walk_notify (fib_node_t *node,
7586                                  fib_node_back_walk_ctx_t *ctx)
7587 {
7588     fib_node_test_t *tc = (fib_node_test_t*) node;
7589
7590     vec_add1(tc->ctxs, *ctx);
7591
7592     if (1 == fib_test_walk_spawns_walks)
7593         fib_walk_sync(test_node_type, tc->index, ctx);
7594     if (2 == fib_test_walk_spawns_walks)
7595         fib_walk_async(test_node_type, tc->index,
7596                        FIB_WALK_PRIORITY_HIGH, ctx);
7597
7598     return (FIB_NODE_BACK_WALK_CONTINUE);
7599 }
7600
7601 static void
7602 fib_test_child_last_lock_gone (fib_node_t *node)
7603 {
7604     fib_node_test_t *tc = (fib_node_test_t *)node;
7605
7606     tc->destroyed = 1;
7607 }
7608
7609 /**
7610  * The FIB walk's graph node virtual function table
7611  */
7612 static const fib_node_vft_t fib_test_child_vft = {
7613     .fnv_get = fib_test_child_get_node,
7614     .fnv_last_lock = fib_test_child_last_lock_gone,
7615     .fnv_back_walk = fib_test_child_back_walk_notify,
7616 };
7617
7618 /*
7619  * the function (that should have been static but isn't so I can do this)
7620  * that processes the walk from the async queue,
7621  */
7622 f64 fib_walk_process_queues(vlib_main_t * vm,
7623                             const f64 quota);
7624 u32 fib_walk_queue_get_size(fib_walk_priority_t prio);
7625
7626 static int
7627 fib_test_walk (void)
7628 {
7629     fib_node_back_walk_ctx_t high_ctx = {}, low_ctx = {};
7630     fib_node_test_t *tc;
7631     vlib_main_t *vm;
7632     u32 ii, res;
7633
7634     res = 0;
7635     vm = vlib_get_main();
7636     test_node_type = fib_node_register_new_type("fib-test", &fib_test_child_vft);
7637
7638     /*
7639      * init a fake node on which we will add children
7640      */
7641     fib_node_init(&fib_test_nodes[PARENT_INDEX].node,
7642                   test_node_type);
7643
7644     FOR_EACH_TEST_CHILD(tc)
7645     {
7646         fib_node_init(&tc->node, test_node_type);
7647         fib_node_lock(&tc->node);
7648         tc->ctxs = NULL;
7649         tc->index = ii;
7650         tc->sibling = fib_node_child_add(test_node_type,
7651                                          PARENT_INDEX,
7652                                          test_node_type, ii);
7653     }
7654
7655     /*
7656      * enqueue a walk across the parents children.
7657      */
7658     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7659
7660     fib_walk_async(test_node_type, PARENT_INDEX,
7661                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7662     FIB_TEST(N_TEST_CHILDREN+1 == fib_node_list_get_size(PARENT()->fn_children),
7663              "Parent has %d children pre-walk",
7664              fib_node_list_get_size(PARENT()->fn_children));
7665
7666     /*
7667      * give the walk a large amount of time so it gets to the end
7668      */
7669     fib_walk_process_queues(vm, 1);
7670
7671     FOR_EACH_TEST_CHILD(tc)
7672     {
7673         FIB_TEST(1 == vec_len(tc->ctxs),
7674                  "%d child visitsed %d times",
7675                  ii, vec_len(tc->ctxs));
7676         vec_free(tc->ctxs);
7677     }
7678     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7679              "Queue is empty post walk");
7680     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7681              "Parent has %d children post walk",
7682              fib_node_list_get_size(PARENT()->fn_children));
7683
7684     /*
7685      * walk again. should be no increase in the number of visits, since
7686      * the walk will have terminated.
7687      */
7688     fib_walk_process_queues(vm, 1);
7689
7690     FOR_EACH_TEST_CHILD(tc)
7691     {
7692         FIB_TEST(0 == vec_len(tc->ctxs),
7693                  "%d child visitsed %d times",
7694                  ii, vec_len(tc->ctxs));
7695     }
7696
7697     /*
7698      * schedule a low and hig priority walk. expect the high to be performed
7699      * before the low.
7700      * schedule the high prio walk first so that it is further from the head
7701      * of the dependency list. that way it won't merge with the low one.
7702      */
7703     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7704     low_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE;
7705
7706     fib_walk_async(test_node_type, PARENT_INDEX,
7707                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7708     fib_walk_async(test_node_type, PARENT_INDEX,
7709                    FIB_WALK_PRIORITY_LOW, &low_ctx);
7710
7711     fib_walk_process_queues(vm, 1);
7712
7713     FOR_EACH_TEST_CHILD(tc)
7714     {
7715         FIB_TEST(high_ctx.fnbw_reason == tc->ctxs[0].fnbw_reason,
7716                  "%d child visitsed by high prio walk", ii);
7717         FIB_TEST(low_ctx.fnbw_reason  == tc->ctxs[1].fnbw_reason,
7718                  "%d child visitsed by low prio walk", ii);
7719         vec_free(tc->ctxs);
7720     }
7721     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7722              "Queue is empty post prio walk");
7723     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7724              "Parent has %d children post prio walk",
7725              fib_node_list_get_size(PARENT()->fn_children));
7726
7727     /*
7728      * schedule 2 walks of the same priority that can be megred.
7729      * expect that each child is thus visited only once.
7730      */
7731     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7732     low_ctx.fnbw_reason  = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7733
7734     fib_walk_async(test_node_type, PARENT_INDEX,
7735                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7736     fib_walk_async(test_node_type, PARENT_INDEX,
7737                    FIB_WALK_PRIORITY_HIGH, &low_ctx);
7738
7739     fib_walk_process_queues(vm, 1);
7740
7741     FOR_EACH_TEST_CHILD(tc)
7742     {
7743         FIB_TEST(1 == vec_len(tc->ctxs),
7744                  "%d child visitsed %d times during merge walk",
7745                  ii, vec_len(tc->ctxs));
7746         vec_free(tc->ctxs);
7747     }
7748     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7749              "Queue is empty post merge walk");
7750     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7751              "Parent has %d children post merge walk",
7752              fib_node_list_get_size(PARENT()->fn_children));
7753
7754     /*
7755      * schedule 2 walks of the same priority that cannot be megred.
7756      * expect that each child is thus visited twice and in the order
7757      * in which the walks were scheduled.
7758      */
7759     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7760     low_ctx.fnbw_reason  = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE;
7761
7762     fib_walk_async(test_node_type, PARENT_INDEX,
7763                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7764     fib_walk_async(test_node_type, PARENT_INDEX,
7765                    FIB_WALK_PRIORITY_HIGH, &low_ctx);
7766
7767     fib_walk_process_queues(vm, 1);
7768
7769     FOR_EACH_TEST_CHILD(tc)
7770     {
7771         FIB_TEST(high_ctx.fnbw_reason == tc->ctxs[0].fnbw_reason,
7772                  "%d child visitsed by high prio walk", ii);
7773         FIB_TEST(low_ctx.fnbw_reason  == tc->ctxs[1].fnbw_reason,
7774                  "%d child visitsed by low prio walk", ii);
7775         vec_free(tc->ctxs);
7776     }
7777     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7778              "Queue is empty post no-merge walk");
7779     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7780              "Parent has %d children post no-merge walk",
7781              fib_node_list_get_size(PARENT()->fn_children));
7782
7783     /*
7784      * schedule a walk that makes one one child progress.
7785      * we do this by giving the queue draining process zero
7786      * time quanta. it's a do..while loop, so it does something.
7787      */
7788     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7789
7790     fib_walk_async(test_node_type, PARENT_INDEX,
7791                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7792     fib_walk_process_queues(vm, 0);
7793
7794     FOR_EACH_TEST_CHILD(tc)
7795     {
7796         if (ii == N_TEST_CHILDREN)
7797         {
7798             FIB_TEST(1 == vec_len(tc->ctxs),
7799                      "%d child visitsed %d times in zero quanta walk",
7800                      ii, vec_len(tc->ctxs));
7801         }
7802         else
7803         {
7804             FIB_TEST(0 == vec_len(tc->ctxs),
7805                      "%d child visitsed %d times in 0 quanta walk",
7806                      ii, vec_len(tc->ctxs));
7807         }
7808     }
7809     FIB_TEST(1 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7810              "Queue is not empty post zero quanta walk");
7811     FIB_TEST(N_TEST_CHILDREN+1 == fib_node_list_get_size(PARENT()->fn_children),
7812              "Parent has %d children post zero qunta walk",
7813              fib_node_list_get_size(PARENT()->fn_children));
7814
7815     /*
7816      * another one step
7817      */
7818     fib_walk_process_queues(vm, 0);
7819
7820     FOR_EACH_TEST_CHILD(tc)
7821     {
7822         if (ii >= N_TEST_CHILDREN-1)
7823         {
7824             FIB_TEST(1 == vec_len(tc->ctxs),
7825                      "%d child visitsed %d times in 2nd zero quanta walk",
7826                      ii, vec_len(tc->ctxs));
7827         }
7828         else
7829         {
7830             FIB_TEST(0 == vec_len(tc->ctxs),
7831                      "%d child visitsed %d times in 2nd 0 quanta walk",
7832                      ii, vec_len(tc->ctxs));
7833         }
7834     }
7835     FIB_TEST(1 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7836              "Queue is not empty post zero quanta walk");
7837     FIB_TEST(N_TEST_CHILDREN+1 == fib_node_list_get_size(PARENT()->fn_children),
7838              "Parent has %d children post zero qunta walk",
7839              fib_node_list_get_size(PARENT()->fn_children));
7840
7841     /*
7842      * schedule another walk that will catch-up and merge.
7843      */
7844     fib_walk_async(test_node_type, PARENT_INDEX,
7845                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7846     fib_walk_process_queues(vm, 1);
7847
7848     FOR_EACH_TEST_CHILD(tc)
7849     {
7850         if (ii >= N_TEST_CHILDREN-1)
7851         {
7852             FIB_TEST(2 == vec_len(tc->ctxs),
7853                      "%d child visitsed %d times in 2nd zero quanta merge walk",
7854                      ii, vec_len(tc->ctxs));
7855             vec_free(tc->ctxs);
7856         }
7857         else
7858         {
7859             FIB_TEST(1 == vec_len(tc->ctxs),
7860                      "%d child visitsed %d times in 2nd 0 quanta merge walk",
7861                      ii, vec_len(tc->ctxs));
7862             vec_free(tc->ctxs);
7863         }
7864     }
7865     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7866              "Queue is not empty post 2nd zero quanta merge walk");
7867     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7868              "Parent has %d children post 2nd zero qunta merge walk",
7869              fib_node_list_get_size(PARENT()->fn_children));
7870
7871     /*
7872      * park a async walk in the middle of the list, then have an sync walk catch
7873      * it. same expectations as async catches async.
7874      */
7875     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7876
7877     fib_walk_async(test_node_type, PARENT_INDEX,
7878                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7879
7880     fib_walk_process_queues(vm, 0);
7881     fib_walk_process_queues(vm, 0);
7882
7883     fib_walk_sync(test_node_type, PARENT_INDEX, &high_ctx);
7884
7885     FOR_EACH_TEST_CHILD(tc)
7886     {
7887         if (ii >= N_TEST_CHILDREN-1)
7888         {
7889             FIB_TEST(2 == vec_len(tc->ctxs),
7890                      "%d child visitsed %d times in sync catches async walk",
7891                      ii, vec_len(tc->ctxs));
7892             vec_free(tc->ctxs);
7893         }
7894         else
7895         {
7896             FIB_TEST(1 == vec_len(tc->ctxs),
7897                      "%d child visitsed %d times in sync catches async walk",
7898                      ii, vec_len(tc->ctxs));
7899             vec_free(tc->ctxs);
7900         }
7901     }
7902     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7903              "Queue is not empty post 2nd zero quanta merge walk");
7904     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7905              "Parent has %d children post 2nd zero qunta merge walk",
7906              fib_node_list_get_size(PARENT()->fn_children));
7907
7908     /*
7909      * make the parent a child of one of its children, thus inducing a routing loop.
7910      */
7911     fib_test_nodes[PARENT_INDEX].sibling =
7912         fib_node_child_add(test_node_type,
7913                            1, // the first child
7914                            test_node_type,
7915                            PARENT_INDEX);
7916
7917     /*
7918      * execute a sync walk from the parent. each child visited spawns more sync
7919      * walks. we expect the walk to terminate.
7920      */
7921     fib_test_walk_spawns_walks = 1;
7922
7923     fib_walk_sync(test_node_type, PARENT_INDEX, &high_ctx);
7924
7925     FOR_EACH_TEST_CHILD(tc)
7926     {
7927         /*
7928          * child 1 - which is last in the list - has the loop.
7929          * the other children a re thus visitsed first. the we meet
7930          * child 1. we go round the loop again, visting the other children.
7931          * then we meet the walk in the dep list and bail. child 1 is not visitsed
7932          * again.
7933          */
7934         if (1 == ii)
7935         {
7936             FIB_TEST(1 == vec_len(tc->ctxs),
7937                      "child %d visitsed %d times during looped sync walk",
7938                      ii, vec_len(tc->ctxs));
7939         }
7940         else
7941         {
7942             FIB_TEST(2 == vec_len(tc->ctxs),
7943                      "child %d visitsed %d times during looped sync walk",
7944                      ii, vec_len(tc->ctxs));
7945         }
7946         vec_free(tc->ctxs);
7947     }
7948     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7949              "Parent has %d children post sync loop walk",
7950              fib_node_list_get_size(PARENT()->fn_children));
7951
7952     /*
7953      * the walk doesn't reach the max depth because the infra knows that sync
7954      * meets sync implies a loop and bails early.
7955      */
7956     FIB_TEST(high_ctx.fnbw_depth == 9,
7957              "Walk context depth %d post sync loop walk",
7958              high_ctx.fnbw_depth);
7959
7960     /*
7961      * execute an async walk of the graph loop, with each child spawns sync walks
7962      */
7963     high_ctx.fnbw_depth = 0;
7964     fib_walk_async(test_node_type, PARENT_INDEX,
7965                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7966
7967     fib_walk_process_queues(vm, 1);
7968
7969     FOR_EACH_TEST_CHILD(tc)
7970     {
7971         /*
7972          * we don't really care how many times the children are visited, as long as
7973          * it is more than once.
7974          */
7975         FIB_TEST(1 <= vec_len(tc->ctxs),
7976                  "child %d visitsed %d times during looped aync spawns sync walk",
7977                  ii, vec_len(tc->ctxs));
7978         vec_free(tc->ctxs);
7979     }
7980
7981     /*
7982      * execute an async walk of the graph loop, with each child spawns async walks
7983      */
7984     fib_test_walk_spawns_walks = 2;
7985     high_ctx.fnbw_depth = 0;
7986     fib_walk_async(test_node_type, PARENT_INDEX,
7987                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7988
7989     fib_walk_process_queues(vm, 1);
7990
7991     FOR_EACH_TEST_CHILD(tc)
7992     {
7993         /*
7994          * we don't really care how many times the children are visited, as long as
7995          * it is more than once.
7996          */
7997         FIB_TEST(1 <= vec_len(tc->ctxs),
7998                  "child %d visitsed %d times during looped async spawns async walk",
7999                  ii, vec_len(tc->ctxs));
8000         vec_free(tc->ctxs);
8001     }
8002
8003
8004     fib_node_child_remove(test_node_type,
8005                           1, // the first child
8006                           fib_test_nodes[PARENT_INDEX].sibling);
8007
8008     /*
8009      * cleanup
8010      */
8011     FOR_EACH_TEST_CHILD(tc)
8012     {
8013         fib_node_child_remove(test_node_type, PARENT_INDEX,
8014                               tc->sibling);
8015         fib_node_deinit(&tc->node);
8016         fib_node_unlock(&tc->node);
8017     }
8018     fib_node_deinit(PARENT());
8019
8020     /*
8021      * The parent will be destroyed when the last lock on it goes.
8022      * this test ensures all the walk objects are unlocking it.
8023      */
8024     FIB_TEST((1 == fib_test_nodes[PARENT_INDEX].destroyed),
8025              "Parent was destroyed");
8026
8027     return (res);
8028 }
8029
8030 /*
8031  * declaration of the otherwise static callback functions
8032  */
8033 void fib_bfd_notify (bfd_listen_event_e event,
8034                      const bfd_session_t *session);
8035 void adj_bfd_notify (bfd_listen_event_e event,
8036                      const bfd_session_t *session);
8037
8038 /**
8039  * Test BFD session interaction with FIB
8040  */
8041 static int
8042 fib_test_bfd (void)
8043 {
8044     fib_node_index_t fei;
8045     test_main_t *tm;
8046     int n_feis, res;
8047
8048     res = 0;
8049     /* via 10.10.10.1 */
8050     ip46_address_t nh_10_10_10_1 = {
8051         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
8052     };
8053     /* via 10.10.10.2 */
8054     ip46_address_t nh_10_10_10_2 = {
8055         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
8056     };
8057     /* via 10.10.10.10 */
8058     ip46_address_t nh_10_10_10_10 = {
8059         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
8060     };
8061     n_feis = fib_entry_pool_size();
8062
8063     tm = &test_main;
8064
8065     /*
8066      * add interface routes. we'll assume this works. it's tested elsewhere
8067      */
8068     fib_prefix_t pfx_10_10_10_10_s_24 = {
8069         .fp_len = 24,
8070         .fp_proto = FIB_PROTOCOL_IP4,
8071         .fp_addr = nh_10_10_10_10,
8072     };
8073
8074     fib_table_entry_update_one_path(0, &pfx_10_10_10_10_s_24,
8075                                     FIB_SOURCE_INTERFACE,
8076                                     (FIB_ENTRY_FLAG_CONNECTED |
8077                                      FIB_ENTRY_FLAG_ATTACHED),
8078                                     DPO_PROTO_IP4,
8079                                     NULL,
8080                                     tm->hw[0]->sw_if_index,
8081                                     ~0, // invalid fib index
8082                                     1, // weight
8083                                     NULL,
8084                                     FIB_ROUTE_PATH_FLAG_NONE);
8085
8086     fib_prefix_t pfx_10_10_10_10_s_32 = {
8087         .fp_len = 32,
8088         .fp_proto = FIB_PROTOCOL_IP4,
8089         .fp_addr = nh_10_10_10_10,
8090     };
8091     fib_table_entry_update_one_path(0, &pfx_10_10_10_10_s_32,
8092                                     FIB_SOURCE_INTERFACE,
8093                                     (FIB_ENTRY_FLAG_CONNECTED |
8094                                      FIB_ENTRY_FLAG_LOCAL),
8095                                     DPO_PROTO_IP4,
8096                                     NULL,
8097                                     tm->hw[0]->sw_if_index,
8098                                     ~0, // invalid fib index
8099                                     1, // weight
8100                                     NULL,
8101                                     FIB_ROUTE_PATH_FLAG_NONE);
8102
8103     /*
8104      * A BFD session via a neighbour we do not yet know
8105      */
8106     bfd_session_t bfd_10_10_10_1 = {
8107         .udp = {
8108             .key = {
8109                 .fib_index = 0,
8110                 .peer_addr = nh_10_10_10_1,
8111             },
8112         },
8113         .hop_type = BFD_HOP_TYPE_MULTI,
8114         .local_state = BFD_STATE_init,
8115     };
8116
8117     fib_bfd_notify (BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_1);
8118
8119     /*
8120      * A new entry will be created that forwards via the adj
8121      */
8122     adj_index_t ai_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
8123                                                     VNET_LINK_IP4,
8124                                                     &nh_10_10_10_1,
8125                                                     tm->hw[0]->sw_if_index);
8126     fib_prefix_t pfx_10_10_10_1_s_32 = {
8127         .fp_addr = nh_10_10_10_1,
8128         .fp_len = 32,
8129         .fp_proto = FIB_PROTOCOL_IP4,
8130     };
8131     fib_test_lb_bucket_t adj_o_10_10_10_1 = {
8132         .type = FT_LB_ADJ,
8133         .adj = {
8134             .adj = ai_10_10_10_1,
8135         },
8136     };
8137
8138     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_1_s_32);
8139     FIB_TEST(!fib_test_validate_entry(fei,
8140                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8141                                       1,
8142                                       &adj_o_10_10_10_1),
8143              "BFD sourced %U via %U",
8144              format_fib_prefix, &pfx_10_10_10_1_s_32,
8145              format_ip_adjacency, ai_10_10_10_1, FORMAT_IP_ADJACENCY_NONE);
8146
8147     /*
8148      * Delete the BFD session. Expect the fib_entry to be removed
8149      */
8150     fib_bfd_notify (BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_1);
8151
8152     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_1_s_32);
8153     FIB_TEST(FIB_NODE_INDEX_INVALID == fei,
8154              "BFD sourced %U removed",
8155              format_fib_prefix, &pfx_10_10_10_1_s_32);
8156
8157     /*
8158      * Add the BFD source back
8159      */
8160     fib_bfd_notify (BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_1);
8161
8162     /*
8163      * source the entry via the ADJ fib
8164      */
8165     fei = fib_table_entry_path_add(0,
8166                                    &pfx_10_10_10_1_s_32,
8167                                    FIB_SOURCE_ADJ,
8168                                    FIB_ENTRY_FLAG_ATTACHED,
8169                                    DPO_PROTO_IP4,
8170                                    &nh_10_10_10_1,
8171                                    tm->hw[0]->sw_if_index,
8172                                    ~0, // invalid fib index
8173                                    1,
8174                                    NULL,
8175                                    FIB_ROUTE_PATH_FLAG_NONE);
8176
8177     /*
8178      * Delete the BFD session. Expect the fib_entry to remain
8179      */
8180     fib_bfd_notify (BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_1);
8181
8182     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_1_s_32);
8183     FIB_TEST(!fib_test_validate_entry(fei,
8184                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8185                                       1,
8186                                       &adj_o_10_10_10_1),
8187              "BFD sourced %U remains via %U",
8188              format_fib_prefix, &pfx_10_10_10_1_s_32,
8189              format_ip_adjacency, ai_10_10_10_1, FORMAT_IP_ADJACENCY_NONE);
8190
8191     /*
8192      * Add the BFD source back
8193      */
8194     fib_bfd_notify (BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_1);
8195
8196     /*
8197      * Create another ADJ FIB
8198      */
8199     fib_prefix_t pfx_10_10_10_2_s_32 = {
8200         .fp_addr = nh_10_10_10_2,
8201         .fp_len = 32,
8202         .fp_proto = FIB_PROTOCOL_IP4,
8203     };
8204     fib_table_entry_path_add(0,
8205                              &pfx_10_10_10_2_s_32,
8206                              FIB_SOURCE_ADJ,
8207                              FIB_ENTRY_FLAG_ATTACHED,
8208                              DPO_PROTO_IP4,
8209                              &nh_10_10_10_2,
8210                              tm->hw[0]->sw_if_index,
8211                              ~0, // invalid fib index
8212                              1,
8213                              NULL,
8214                              FIB_ROUTE_PATH_FLAG_NONE);
8215     /*
8216      * A BFD session for the new ADJ FIB
8217      */
8218     bfd_session_t bfd_10_10_10_2 = {
8219         .udp = {
8220             .key = {
8221                 .fib_index = 0,
8222                 .peer_addr = nh_10_10_10_2,
8223             },
8224         },
8225         .hop_type = BFD_HOP_TYPE_MULTI,
8226         .local_state = BFD_STATE_init,
8227     };
8228
8229     fib_bfd_notify (BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_2);
8230
8231     /*
8232      * remove the adj-fib source whilst the session is present
8233      * then add it back
8234      */
8235     fib_table_entry_delete(0, &pfx_10_10_10_2_s_32, FIB_SOURCE_ADJ);
8236     fib_table_entry_path_add(0,
8237                              &pfx_10_10_10_2_s_32,
8238                              FIB_SOURCE_ADJ,
8239                              FIB_ENTRY_FLAG_ATTACHED,
8240                              DPO_PROTO_IP4,
8241                              &nh_10_10_10_2,
8242                              tm->hw[0]->sw_if_index,
8243                              ~0, // invalid fib index
8244                              1,
8245                              NULL,
8246                              FIB_ROUTE_PATH_FLAG_NONE);
8247
8248     /*
8249      * Before adding a recursive via the BFD tracked ADJ-FIBs,
8250      * bring one of the sessions UP, leave the other down
8251      */
8252     bfd_10_10_10_1.local_state = BFD_STATE_up;
8253     fib_bfd_notify (BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_1);
8254     bfd_10_10_10_2.local_state = BFD_STATE_down;
8255     fib_bfd_notify (BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_2);
8256
8257     /*
8258      * A recursive prefix via both of the ADJ FIBs
8259      */
8260     fib_prefix_t pfx_200_0_0_0_s_24 = {
8261         .fp_proto = FIB_PROTOCOL_IP4,
8262         .fp_len = 32,
8263         .fp_addr = {
8264             .ip4.as_u32 = clib_host_to_net_u32(0xc8000000),
8265         },
8266     };
8267     const dpo_id_t *dpo_10_10_10_1, *dpo_10_10_10_2;
8268
8269     dpo_10_10_10_1 =
8270         fib_entry_contribute_ip_forwarding(
8271             fib_table_lookup_exact_match(0, &pfx_10_10_10_1_s_32));
8272     dpo_10_10_10_2 =
8273         fib_entry_contribute_ip_forwarding(
8274             fib_table_lookup_exact_match(0, &pfx_10_10_10_2_s_32));
8275
8276     fib_test_lb_bucket_t lb_o_10_10_10_1 = {
8277         .type = FT_LB_O_LB,
8278         .lb = {
8279             .lb = dpo_10_10_10_1->dpoi_index,
8280         },
8281     };
8282     fib_test_lb_bucket_t lb_o_10_10_10_2 = {
8283         .type = FT_LB_O_LB,
8284         .lb = {
8285             .lb = dpo_10_10_10_2->dpoi_index,
8286         },
8287     };
8288
8289     /*
8290      * A prefix via the adj-fib that is BFD down => DROP
8291      */
8292     fei = fib_table_entry_path_add(0,
8293                                    &pfx_200_0_0_0_s_24,
8294                                    FIB_SOURCE_API,
8295                                    FIB_ENTRY_FLAG_NONE,
8296                                    DPO_PROTO_IP4,
8297                                    &nh_10_10_10_2,
8298                                    ~0, // recursive
8299                                    0, // default fib index
8300                                    1,
8301                                    NULL,
8302                                    FIB_ROUTE_PATH_FLAG_NONE);
8303     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
8304              "%U resolves via drop",
8305              format_fib_prefix, &pfx_200_0_0_0_s_24);
8306
8307     /*
8308      * add a path via the UP BFD adj-fib.
8309      *  we expect that the DOWN BFD ADJ FIB is not used.
8310      */
8311     fei = fib_table_entry_path_add(0,
8312                                    &pfx_200_0_0_0_s_24,
8313                                    FIB_SOURCE_API,
8314                                    FIB_ENTRY_FLAG_NONE,
8315                                    DPO_PROTO_IP4,
8316                                    &nh_10_10_10_1,
8317                                    ~0, // recursive
8318                                    0, // default fib index
8319                                    1,
8320                                    NULL,
8321                                    FIB_ROUTE_PATH_FLAG_NONE);
8322
8323     FIB_TEST(!fib_test_validate_entry(fei,
8324                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8325                                       1,
8326                                       &lb_o_10_10_10_1),
8327              "Recursive %U only UP BFD adj-fibs",
8328              format_fib_prefix, &pfx_200_0_0_0_s_24);
8329
8330     /*
8331      * Send a BFD state change to UP - both sessions are now up
8332      *  the recursive prefix should LB over both
8333      */
8334     bfd_10_10_10_2.local_state = BFD_STATE_up;
8335     fib_bfd_notify (BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_2);
8336
8337
8338     FIB_TEST(!fib_test_validate_entry(fei,
8339                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8340                                       2,
8341                                       &lb_o_10_10_10_1,
8342                                       &lb_o_10_10_10_2),
8343              "Recursive %U via both UP BFD adj-fibs",
8344              format_fib_prefix, &pfx_200_0_0_0_s_24);
8345
8346     /*
8347      * Send a BFD state change to DOWN
8348      *  the recursive prefix should exclude the down
8349      */
8350     bfd_10_10_10_2.local_state = BFD_STATE_down;
8351     fib_bfd_notify (BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_2);
8352
8353
8354     FIB_TEST(!fib_test_validate_entry(fei,
8355                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8356                                       1,
8357                                       &lb_o_10_10_10_1),
8358              "Recursive %U via only UP",
8359              format_fib_prefix, &pfx_200_0_0_0_s_24);
8360
8361     /*
8362      * Delete the BFD session while it is in the DOWN state.
8363      *  FIB should consider the entry's state as back up
8364      */
8365     fib_bfd_notify (BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_2);
8366
8367     FIB_TEST(!fib_test_validate_entry(fei,
8368                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8369                                       2,
8370                                       &lb_o_10_10_10_1,
8371                                       &lb_o_10_10_10_2),
8372              "Recursive %U via both UP BFD adj-fibs post down session delete",
8373              format_fib_prefix, &pfx_200_0_0_0_s_24);
8374
8375     /*
8376      * Delete the BFD other session while it is in the UP state.
8377      */
8378     fib_bfd_notify (BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_1);
8379
8380     FIB_TEST(!fib_test_validate_entry(fei,
8381                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8382                                       2,
8383                                       &lb_o_10_10_10_1,
8384                                       &lb_o_10_10_10_2),
8385              "Recursive %U via both UP BFD adj-fibs post up session delete",
8386              format_fib_prefix, &pfx_200_0_0_0_s_24);
8387
8388     /*
8389      * cleaup
8390      */
8391     fib_table_entry_delete(0, &pfx_200_0_0_0_s_24, FIB_SOURCE_API);
8392     fib_table_entry_delete(0, &pfx_10_10_10_1_s_32, FIB_SOURCE_ADJ);
8393     fib_table_entry_delete(0, &pfx_10_10_10_2_s_32, FIB_SOURCE_ADJ);
8394
8395     fib_table_entry_delete(0, &pfx_10_10_10_10_s_32, FIB_SOURCE_INTERFACE);
8396     fib_table_entry_delete(0, &pfx_10_10_10_10_s_24, FIB_SOURCE_INTERFACE);
8397
8398     adj_unlock(ai_10_10_10_1);
8399     /*
8400      * test no-one left behind
8401      */
8402     FIB_TEST((n_feis == fib_entry_pool_size()), "Entries gone");
8403     FIB_TEST(0 == adj_nbr_db_size(), "All adjacencies removed");
8404
8405     /*
8406      * Single-hop BFD tests
8407      */
8408     bfd_10_10_10_1.hop_type = BFD_HOP_TYPE_SINGLE;
8409     bfd_10_10_10_1.udp.key.sw_if_index = tm->hw[0]->sw_if_index;
8410
8411     ai_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
8412                                         VNET_LINK_IP4,
8413                                         &nh_10_10_10_1,
8414                                         tm->hw[0]->sw_if_index);
8415     bfd_10_10_10_1.udp.adj_index = ai_10_10_10_1;
8416
8417     adj_bfd_notify(BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_1);
8418
8419     /*
8420      * whilst the BFD session is not signalled, the adj is up
8421      */
8422     FIB_TEST(!adj_is_up(ai_10_10_10_1), "Adj state down on uninit session");
8423
8424     /*
8425      * bring the BFD session up
8426      */
8427     bfd_10_10_10_1.local_state = BFD_STATE_up;
8428     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_1);
8429     FIB_TEST(adj_is_up(ai_10_10_10_1), "Adj state up on UP session");
8430
8431     /*
8432      * bring the BFD session down
8433      */
8434     bfd_10_10_10_1.local_state = BFD_STATE_down;
8435     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_1);
8436     FIB_TEST(!adj_is_up(ai_10_10_10_1), "Adj state down on DOWN session");
8437
8438     /*
8439      * add an attached next hop FIB entry via the down adj
8440      */
8441     fib_prefix_t pfx_5_5_5_5_s_32 = {
8442         .fp_addr = {
8443             .ip4 = {
8444                 .as_u32 = clib_host_to_net_u32(0x05050505),
8445             },
8446         },
8447         .fp_len = 32,
8448         .fp_proto = FIB_PROTOCOL_IP4,
8449     };
8450
8451     fei = fib_table_entry_path_add(0,
8452                                    &pfx_5_5_5_5_s_32,
8453                                    FIB_SOURCE_CLI,
8454                                    FIB_ENTRY_FLAG_NONE,
8455                                    DPO_PROTO_IP4,
8456                                    &nh_10_10_10_1,
8457                                    tm->hw[0]->sw_if_index,
8458                                    ~0, // invalid fib index
8459                                    1,
8460                                    NULL,
8461                                    FIB_ROUTE_PATH_FLAG_NONE);
8462     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
8463              "%U resolves via drop",
8464              format_fib_prefix, &pfx_5_5_5_5_s_32);
8465
8466     /*
8467      * Add a path via an ADJ that is up
8468      */
8469     adj_index_t ai_10_10_10_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
8470                                                     VNET_LINK_IP4,
8471                                                     &nh_10_10_10_2,
8472                                                     tm->hw[0]->sw_if_index);
8473
8474     fib_test_lb_bucket_t adj_o_10_10_10_2 = {
8475         .type = FT_LB_ADJ,
8476         .adj = {
8477             .adj = ai_10_10_10_2,
8478         },
8479     };
8480     adj_o_10_10_10_1.adj.adj = ai_10_10_10_1;
8481
8482     fei = fib_table_entry_path_add(0,
8483                                    &pfx_5_5_5_5_s_32,
8484                                    FIB_SOURCE_CLI,
8485                                    FIB_ENTRY_FLAG_NONE,
8486                                    DPO_PROTO_IP4,
8487                                    &nh_10_10_10_2,
8488                                    tm->hw[0]->sw_if_index,
8489                                    ~0, // invalid fib index
8490                                    1,
8491                                    NULL,
8492                                    FIB_ROUTE_PATH_FLAG_NONE);
8493
8494     FIB_TEST(!fib_test_validate_entry(fei,
8495                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8496                                       1,
8497                                       &adj_o_10_10_10_2),
8498              "BFD sourced %U via %U",
8499              format_fib_prefix, &pfx_5_5_5_5_s_32,
8500              format_ip_adjacency, ai_10_10_10_2, FORMAT_IP_ADJACENCY_NONE);
8501
8502     /*
8503      * Bring up the down session - should now LB
8504      */
8505     bfd_10_10_10_1.local_state = BFD_STATE_up;
8506     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_1);
8507     FIB_TEST(!fib_test_validate_entry(fei,
8508                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8509                                       2,
8510                                       &adj_o_10_10_10_1,
8511                                       &adj_o_10_10_10_2),
8512              "BFD sourced %U via noth adjs",
8513              format_fib_prefix, &pfx_5_5_5_5_s_32);
8514
8515     /*
8516      * remove the BFD session state from the adj
8517      */
8518     adj_bfd_notify(BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_1);
8519
8520     /*
8521      * clean-up
8522      */
8523     fib_table_entry_delete(0, &pfx_5_5_5_5_s_32, FIB_SOURCE_CLI);
8524     adj_unlock(ai_10_10_10_1);
8525     adj_unlock(ai_10_10_10_2);
8526
8527     /*
8528      * test no-one left behind
8529      */
8530     FIB_TEST((n_feis == fib_entry_pool_size()), "Entries gone");
8531     FIB_TEST(0 == adj_nbr_db_size(), "All adjacencies removed");
8532
8533     return (res);
8534 }
8535
8536 static int
8537 lfib_test (void)
8538 {
8539     const mpls_label_t deag_label = 50;
8540     adj_index_t ai_mpls_10_10_10_1;
8541     dpo_id_t dpo = DPO_INVALID;
8542     const u32 lfib_index = 0;
8543     const u32 fib_index = 0;
8544     const dpo_id_t *dpo1;
8545     fib_node_index_t lfe;
8546     lookup_dpo_t *lkd;
8547     int lb_count, res;
8548     test_main_t *tm;
8549
8550     res = 0;
8551     tm = &test_main;
8552     lb_count = pool_elts(load_balance_pool);
8553
8554     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
8555              adj_nbr_db_size());
8556
8557     /*
8558      * MPLS enable an interface so we get the MPLS table created
8559      */
8560     mpls_table_create(MPLS_FIB_DEFAULT_TABLE_ID, FIB_SOURCE_API, NULL);
8561     mpls_sw_interface_enable_disable(&mpls_main,
8562                                      tm->hw[0]->sw_if_index,
8563                                      1);
8564
8565     ip46_address_t nh_10_10_10_1 = {
8566         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
8567     };
8568     ai_mpls_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
8569                                              VNET_LINK_MPLS,
8570                                              &nh_10_10_10_1,
8571                                              tm->hw[0]->sw_if_index);
8572
8573     /*
8574      * Test the specials stack properly.
8575      */
8576     fib_prefix_t exp_null_v6_pfx = {
8577         .fp_proto = FIB_PROTOCOL_MPLS,
8578         .fp_eos = MPLS_EOS,
8579         .fp_label = MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL,
8580         .fp_payload_proto = DPO_PROTO_IP6,
8581     };
8582     lfe = fib_table_lookup(lfib_index, &exp_null_v6_pfx);
8583     FIB_TEST((FIB_NODE_INDEX_INVALID != lfe),
8584              "%U/%U present",
8585              format_mpls_unicast_label, MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL,
8586              format_mpls_eos_bit, MPLS_EOS);
8587     fib_entry_contribute_forwarding(lfe,
8588                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
8589                                     &dpo);
8590     dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
8591     lkd = lookup_dpo_get(dpo1->dpoi_index);
8592
8593     FIB_TEST((fib_index == lkd->lkd_fib_index),
8594              "%U/%U is deag in %d %U",
8595              format_mpls_unicast_label, deag_label,
8596              format_mpls_eos_bit, MPLS_EOS,
8597              lkd->lkd_fib_index,
8598              format_dpo_id, &dpo, 0);
8599     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
8600              "%U/%U is dst deag",
8601              format_mpls_unicast_label, deag_label,
8602              format_mpls_eos_bit, MPLS_EOS);
8603     FIB_TEST((LOOKUP_TABLE_FROM_INPUT_INTERFACE == lkd->lkd_table),
8604              "%U/%U is lookup in interface's table",
8605              format_mpls_unicast_label, deag_label,
8606              format_mpls_eos_bit, MPLS_EOS);
8607     FIB_TEST((DPO_PROTO_IP6 == lkd->lkd_proto),
8608              "%U/%U is %U dst deag",
8609              format_mpls_unicast_label, deag_label,
8610              format_mpls_eos_bit, MPLS_EOS,
8611              format_dpo_proto, lkd->lkd_proto);
8612
8613     /*
8614      * A route deag route for EOS
8615      */
8616     fib_prefix_t pfx = {
8617         .fp_proto = FIB_PROTOCOL_MPLS,
8618         .fp_eos = MPLS_EOS,
8619         .fp_label = deag_label,
8620         .fp_payload_proto = DPO_PROTO_IP4,
8621     };
8622     mpls_disp_dpo_t *mdd;
8623     lfe = fib_table_entry_path_add(lfib_index,
8624                                    &pfx,
8625                                    FIB_SOURCE_CLI,
8626                                    FIB_ENTRY_FLAG_NONE,
8627                                    DPO_PROTO_IP4,
8628                                    &zero_addr,
8629                                    ~0,
8630                                    fib_index,
8631                                    1,
8632                                    NULL,
8633                                    FIB_ROUTE_PATH_FLAG_NONE);
8634
8635     FIB_TEST((lfe == fib_table_lookup(lfib_index, &pfx)),
8636              "%U/%U present",
8637              format_mpls_unicast_label, deag_label,
8638              format_mpls_eos_bit, MPLS_EOS);
8639
8640     fib_entry_contribute_forwarding(lfe,
8641                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
8642                                     &dpo);
8643     dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
8644     mdd = mpls_disp_dpo_get(dpo1->dpoi_index);
8645
8646     FIB_TEST((FIB_MPLS_LSP_MODE_PIPE == mdd->mdd_mode),
8647              "%U/%U disp is pipe mode",
8648              format_mpls_unicast_label, deag_label,
8649              format_mpls_eos_bit, MPLS_EOS);
8650
8651     lkd = lookup_dpo_get(mdd->mdd_dpo.dpoi_index);
8652
8653     FIB_TEST((fib_index == lkd->lkd_fib_index),
8654              "%U/%U is deag in %d %U",
8655              format_mpls_unicast_label, deag_label,
8656              format_mpls_eos_bit, MPLS_EOS,
8657              lkd->lkd_fib_index,
8658              format_dpo_id, &dpo, 0);
8659     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
8660              "%U/%U is dst deag",
8661              format_mpls_unicast_label, deag_label,
8662              format_mpls_eos_bit, MPLS_EOS);
8663     FIB_TEST((DPO_PROTO_IP4 == lkd->lkd_proto),
8664              "%U/%U is %U dst deag",
8665              format_mpls_unicast_label, deag_label,
8666              format_mpls_eos_bit, MPLS_EOS,
8667              format_dpo_proto, lkd->lkd_proto);
8668
8669     fib_table_entry_delete_index(lfe, FIB_SOURCE_CLI);
8670
8671     FIB_TEST((FIB_NODE_INDEX_INVALID == fib_table_lookup(lfib_index,
8672                                                          &pfx)),
8673               "%U/%U not present",
8674               format_mpls_unicast_label, deag_label,
8675               format_mpls_eos_bit, MPLS_EOS);
8676     dpo_reset(&dpo);
8677
8678     /*
8679      * A route deag route for EOS with LSP mode uniform
8680      */
8681     fib_mpls_label_t *l_pops = NULL, l_pop = {
8682         .fml_value = MPLS_LABEL_POP,
8683         .fml_mode = FIB_MPLS_LSP_MODE_UNIFORM,
8684     };
8685     vec_add1(l_pops, l_pop);
8686     lfe = fib_table_entry_path_add(lfib_index,
8687                                    &pfx,
8688                                    FIB_SOURCE_CLI,
8689                                    FIB_ENTRY_FLAG_NONE,
8690                                    DPO_PROTO_IP4,
8691                                    &zero_addr,
8692                                    ~0,
8693                                    fib_index,
8694                                    1,
8695                                    l_pops,
8696                                    FIB_ROUTE_PATH_FLAG_NONE);
8697
8698     FIB_TEST((lfe == fib_table_lookup(lfib_index, &pfx)),
8699               "%U/%U present",
8700               format_mpls_unicast_label, deag_label,
8701               format_mpls_eos_bit, MPLS_EOS);
8702
8703     fib_entry_contribute_forwarding(lfe,
8704                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
8705                                     &dpo);
8706     dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
8707     mdd = mpls_disp_dpo_get(dpo1->dpoi_index);
8708
8709     FIB_TEST((FIB_MPLS_LSP_MODE_UNIFORM == mdd->mdd_mode),
8710              "%U/%U disp is uniform mode",
8711              format_mpls_unicast_label, deag_label,
8712              format_mpls_eos_bit, MPLS_EOS);
8713
8714     lkd = lookup_dpo_get(mdd->mdd_dpo.dpoi_index);
8715
8716     FIB_TEST((fib_index == lkd->lkd_fib_index),
8717               "%U/%U is deag in %d %U",
8718              format_mpls_unicast_label, deag_label,
8719              format_mpls_eos_bit, MPLS_EOS,
8720              lkd->lkd_fib_index,
8721              format_dpo_id, &dpo, 0);
8722     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
8723              "%U/%U is dst deag",
8724              format_mpls_unicast_label, deag_label,
8725              format_mpls_eos_bit, MPLS_EOS);
8726     FIB_TEST((DPO_PROTO_IP4 == lkd->lkd_proto),
8727              "%U/%U is %U dst deag",
8728              format_mpls_unicast_label, deag_label,
8729              format_mpls_eos_bit, MPLS_EOS,
8730              format_dpo_proto, lkd->lkd_proto);
8731
8732     fib_table_entry_delete_index(lfe, FIB_SOURCE_CLI);
8733
8734     FIB_TEST((FIB_NODE_INDEX_INVALID == fib_table_lookup(lfib_index,
8735                                                          &pfx)),
8736               "%U/%U not present",
8737               format_mpls_unicast_label, deag_label,
8738               format_mpls_eos_bit, MPLS_EOS);
8739     dpo_reset(&dpo);
8740
8741     /*
8742      * A route deag route for non-EOS
8743      */
8744     pfx.fp_eos = MPLS_NON_EOS;
8745     lfe = fib_table_entry_path_add(lfib_index,
8746                                    &pfx,
8747                                    FIB_SOURCE_CLI,
8748                                    FIB_ENTRY_FLAG_NONE,
8749                                    DPO_PROTO_IP4,
8750                                    &zero_addr,
8751                                    ~0,
8752                                    lfib_index,
8753                                    1,
8754                                    NULL,
8755                                    FIB_ROUTE_PATH_FLAG_NONE);
8756
8757     FIB_TEST((lfe == fib_table_lookup(lfib_index, &pfx)),
8758              "%U/%U present",
8759              format_mpls_unicast_label, deag_label,
8760              format_mpls_eos_bit, MPLS_NON_EOS);
8761
8762     fib_entry_contribute_forwarding(lfe,
8763                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
8764                                     &dpo);
8765     dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
8766     lkd = lookup_dpo_get(dpo1->dpoi_index);
8767
8768     FIB_TEST((fib_index == lkd->lkd_fib_index),
8769              "%U/%U is deag in %d %U",
8770              format_mpls_unicast_label, deag_label,
8771              format_mpls_eos_bit, MPLS_NON_EOS,
8772              lkd->lkd_fib_index,
8773              format_dpo_id, &dpo, 0);
8774     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
8775              "%U/%U is dst deag",
8776              format_mpls_unicast_label, deag_label,
8777              format_mpls_eos_bit, MPLS_NON_EOS);
8778
8779     FIB_TEST((DPO_PROTO_MPLS == lkd->lkd_proto),
8780              "%U/%U is %U dst deag",
8781              format_mpls_unicast_label, deag_label,
8782              format_mpls_eos_bit, MPLS_NON_EOS,
8783              format_dpo_proto, lkd->lkd_proto);
8784
8785     fib_table_entry_delete_index(lfe, FIB_SOURCE_CLI);
8786
8787     FIB_TEST((FIB_NODE_INDEX_INVALID == fib_table_lookup(lfib_index,
8788                                                          &pfx)),
8789              "%U/%U not present",
8790              format_mpls_unicast_label, deag_label,
8791              format_mpls_eos_bit, MPLS_EOS);
8792
8793     dpo_reset(&dpo);
8794
8795     /*
8796      * An MPLS x-connect
8797      */
8798     fib_prefix_t pfx_1200 = {
8799         .fp_len = 21,
8800         .fp_proto = FIB_PROTOCOL_MPLS,
8801         .fp_label = 1200,
8802         .fp_eos = MPLS_NON_EOS,
8803     };
8804     fib_test_lb_bucket_t neos_o_10_10_10_1 = {
8805         .type = FT_LB_LABEL_STACK_O_ADJ,
8806         .label_stack_o_adj = {
8807             .adj = ai_mpls_10_10_10_1,
8808             .label_stack_size = 4,
8809             .label_stack = {
8810                 200, 300, 400, 500,
8811             },
8812             .eos = MPLS_NON_EOS,
8813         },
8814     };
8815     dpo_id_t neos_1200 = DPO_INVALID;
8816     dpo_id_t ip_1200 = DPO_INVALID;
8817     fib_mpls_label_t *l200 = NULL;
8818     u32 ii;
8819     for (ii = 0; ii < 4; ii++)
8820     {
8821         fib_mpls_label_t fml = {
8822             .fml_value = 200 + (ii * 100),
8823         };
8824         vec_add1(l200, fml);
8825     };
8826
8827     lfe = fib_table_entry_update_one_path(fib_index,
8828                                           &pfx_1200,
8829                                           FIB_SOURCE_API,
8830                                           FIB_ENTRY_FLAG_NONE,
8831                                           DPO_PROTO_IP4,
8832                                           &nh_10_10_10_1,
8833                                           tm->hw[0]->sw_if_index,
8834                                           ~0, // invalid fib index
8835                                           1,
8836                                           l200,
8837                                           FIB_ROUTE_PATH_FLAG_NONE);
8838
8839     FIB_TEST(!fib_test_validate_entry(lfe,
8840                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
8841                                       1,
8842                                       &neos_o_10_10_10_1),
8843              "1200/0 LB 1 buckets via: "
8844              "adj 10.10.11.1");
8845
8846     /*
8847      * A recursive route via the MPLS x-connect
8848      */
8849     fib_prefix_t pfx_2_2_2_3_s_32 = {
8850         .fp_len = 32,
8851         .fp_proto = FIB_PROTOCOL_IP4,
8852         .fp_addr = {
8853             .ip4.as_u32 = clib_host_to_net_u32(0x02020203),
8854         },
8855     };
8856     fib_route_path_t *rpaths = NULL, rpath = {
8857         .frp_proto = DPO_PROTO_MPLS,
8858         .frp_local_label = 1200,
8859         .frp_eos = MPLS_NON_EOS,
8860         .frp_sw_if_index = ~0, // recurive
8861         .frp_fib_index = 0, // Default MPLS fib
8862         .frp_weight = 1,
8863         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
8864         .frp_label_stack = NULL,
8865     };
8866     vec_add1(rpaths, rpath);
8867
8868     fib_table_entry_path_add2(fib_index,
8869                               &pfx_2_2_2_3_s_32,
8870                               FIB_SOURCE_API,
8871                               FIB_ENTRY_FLAG_NONE,
8872                               rpaths);
8873
8874     /*
8875      * A labelled recursive route via the MPLS x-connect
8876      */
8877     fib_prefix_t pfx_2_2_2_4_s_32 = {
8878         .fp_len = 32,
8879         .fp_proto = FIB_PROTOCOL_IP4,
8880         .fp_addr = {
8881             .ip4.as_u32 = clib_host_to_net_u32(0x02020204),
8882         },
8883     };
8884     fib_mpls_label_t *l999 = NULL, fml_999 = {
8885         .fml_value = 999,
8886     };
8887     vec_add1(l999, fml_999);
8888     rpaths[0].frp_label_stack = l999,
8889
8890         fib_table_entry_path_add2(fib_index,
8891                                   &pfx_2_2_2_4_s_32,
8892                                   FIB_SOURCE_API,
8893                                   FIB_ENTRY_FLAG_NONE,
8894                                   rpaths);
8895
8896     fib_entry_contribute_forwarding(fib_table_lookup(fib_index, &pfx_1200),
8897                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8898                                     &ip_1200);
8899     fib_entry_contribute_forwarding(fib_table_lookup(fib_index, &pfx_1200),
8900                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
8901                                     &neos_1200);
8902
8903     fib_test_lb_bucket_t ip_o_1200 = {
8904         .type = FT_LB_O_LB,
8905         .lb = {
8906             .lb = ip_1200.dpoi_index,
8907         },
8908     };
8909     fib_test_lb_bucket_t mpls_o_1200 = {
8910         .type = FT_LB_LABEL_O_LB,
8911         .label_o_lb = {
8912             .lb = neos_1200.dpoi_index,
8913             .label = 999,
8914             .eos = MPLS_EOS,
8915         },
8916     };
8917
8918     lfe = fib_table_lookup(fib_index, &pfx_2_2_2_3_s_32);
8919     FIB_TEST(!fib_test_validate_entry(lfe,
8920                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8921                                       1,
8922                                       &ip_o_1200),
8923              "2.2.2.2.3/32 LB 1 buckets via: label 1200 EOS");
8924     lfe = fib_table_lookup(fib_index, &pfx_2_2_2_4_s_32);
8925     FIB_TEST(!fib_test_validate_entry(lfe,
8926                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8927                                       1,
8928                                       &mpls_o_1200),
8929              "2.2.2.2.4/32 LB 1 buckets via: label 1200 non-EOS");
8930
8931     fib_table_entry_delete(fib_index, &pfx_1200, FIB_SOURCE_API);
8932     fib_table_entry_delete(fib_index, &pfx_2_2_2_3_s_32, FIB_SOURCE_API);
8933     fib_table_entry_delete(fib_index, &pfx_2_2_2_4_s_32, FIB_SOURCE_API);
8934
8935     dpo_reset(&neos_1200);
8936     dpo_reset(&ip_1200);
8937
8938     /*
8939      * A recursive via a label that does not exist
8940      */
8941     fib_test_lb_bucket_t bucket_drop = {
8942         .type = FT_LB_DROP,
8943         .special = {
8944             .adj = DPO_PROTO_IP4,
8945         },
8946     };
8947     fib_test_lb_bucket_t mpls_bucket_drop = {
8948         .type = FT_LB_DROP,
8949         .special = {
8950             .adj = DPO_PROTO_MPLS,
8951         },
8952     };
8953
8954     rpaths[0].frp_label_stack = NULL;
8955     lfe = fib_table_entry_path_add2(fib_index,
8956                                     &pfx_2_2_2_4_s_32,
8957                                     FIB_SOURCE_API,
8958                                     FIB_ENTRY_FLAG_NONE,
8959                                     rpaths);
8960
8961     fib_entry_contribute_forwarding(fib_table_lookup(fib_index, &pfx_1200),
8962                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8963                                     &ip_1200);
8964     ip_o_1200.lb.lb = ip_1200.dpoi_index;
8965
8966     FIB_TEST(!fib_test_validate_entry(lfe,
8967                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8968                                       1,
8969                                       &bucket_drop),
8970              "2.2.2.2.4/32 LB 1 buckets via: drop");
8971     lfe = fib_table_lookup(fib_index, &pfx_1200);
8972     FIB_TEST(!fib_test_validate_entry(lfe,
8973                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8974                                       1,
8975                                       &bucket_drop),
8976              "1200/neos LB 1 buckets via: ip4-DROP");
8977     FIB_TEST(!fib_test_validate_entry(lfe,
8978                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
8979                                       1,
8980                                       &mpls_bucket_drop),
8981              "1200/neos LB 1 buckets via: mpls-DROP");
8982
8983     fib_table_entry_delete(fib_index, &pfx_2_2_2_4_s_32, FIB_SOURCE_API);
8984
8985     dpo_reset(&ip_1200);
8986
8987     /*
8988      * An rx-interface route.
8989      *  like the tail of an mcast LSP
8990      */
8991     dpo_id_t idpo = DPO_INVALID;
8992
8993     interface_rx_dpo_add_or_lock(DPO_PROTO_IP4,
8994                                  tm->hw[0]->sw_if_index,
8995                                  &idpo);
8996
8997     fib_prefix_t pfx_2500 = {
8998         .fp_len = 21,
8999         .fp_proto = FIB_PROTOCOL_MPLS,
9000         .fp_label = 2500,
9001         .fp_eos = MPLS_EOS,
9002         .fp_payload_proto = DPO_PROTO_IP4,
9003     };
9004     fib_test_lb_bucket_t rx_intf_0 = {
9005         .type = FT_LB_INTF,
9006         .adj = {
9007             .adj = idpo.dpoi_index,
9008         },
9009     };
9010
9011     lfe = fib_table_entry_update_one_path(fib_index,
9012                                           &pfx_2500,
9013                                           FIB_SOURCE_API,
9014                                           FIB_ENTRY_FLAG_NONE,
9015                                           DPO_PROTO_IP4,
9016                                           NULL,
9017                                           tm->hw[0]->sw_if_index,
9018                                           ~0, // invalid fib index
9019                                           0,
9020                                           NULL,
9021                                           FIB_ROUTE_PATH_INTF_RX);
9022     FIB_TEST(!fib_test_validate_entry(lfe,
9023                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
9024                                       1,
9025                                       &rx_intf_0),
9026              "2500 rx-interface 0");
9027     fib_table_entry_delete(fib_index, &pfx_2500, FIB_SOURCE_API);
9028
9029     /*
9030      * An MPLS mulicast entry
9031      */
9032     fib_prefix_t pfx_3500 = {
9033         .fp_len = 21,
9034         .fp_proto = FIB_PROTOCOL_MPLS,
9035         .fp_label = 3500,
9036         .fp_eos = MPLS_EOS,
9037         .fp_payload_proto = DPO_PROTO_IP4,
9038     };
9039     fib_test_rep_bucket_t mc_0 = {
9040         .type = FT_REP_LABEL_O_ADJ,
9041         .label_o_adj = {
9042             .adj = ai_mpls_10_10_10_1,
9043             .label = 3300,
9044             .eos = MPLS_EOS,
9045         },
9046     };
9047     fib_test_rep_bucket_t mc_intf_0 = {
9048         .type = FT_REP_INTF,
9049         .adj = {
9050             .adj = idpo.dpoi_index,
9051         },
9052     };
9053     fib_mpls_label_t *l3300 = NULL, fml_3300 = {
9054         .fml_value = 3300,
9055     };
9056     vec_add1(l3300, fml_3300);
9057
9058     lfe = fib_table_entry_update_one_path(lfib_index,
9059                                           &pfx_3500,
9060                                           FIB_SOURCE_API,
9061                                           FIB_ENTRY_FLAG_MULTICAST,
9062                                           DPO_PROTO_IP4,
9063                                           &nh_10_10_10_1,
9064                                           tm->hw[0]->sw_if_index,
9065                                           ~0, // invalid fib index
9066                                           1,
9067                                           l3300,
9068                                           FIB_ROUTE_PATH_FLAG_NONE);
9069     FIB_TEST(!fib_test_validate_entry(lfe,
9070                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
9071                                       1,
9072                                       &mc_0),
9073              "3500 via replicate over 10.10.10.1");
9074
9075     /*
9076      * MPLS Bud-node. Add a replication via an interface-receieve path
9077      */
9078     lfe = fib_table_entry_path_add(lfib_index,
9079                                    &pfx_3500,
9080                                    FIB_SOURCE_API,
9081                                    FIB_ENTRY_FLAG_MULTICAST,
9082                                    DPO_PROTO_IP4,
9083                                    NULL,
9084                                    tm->hw[0]->sw_if_index,
9085                                    ~0, // invalid fib index
9086                                    0,
9087                                    NULL,
9088                                    FIB_ROUTE_PATH_INTF_RX);
9089     FIB_TEST(!fib_test_validate_entry(lfe,
9090                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
9091                                       2,
9092                                       &mc_0,
9093                                       &mc_intf_0),
9094              "3500 via replicate over 10.10.10.1 and interface-rx");
9095
9096     /*
9097      * Add a replication via an interface-free for-us path
9098      */
9099     fib_test_rep_bucket_t mc_disp = {
9100         .type = FT_REP_DISP_MFIB_LOOKUP,
9101         .adj = {
9102             .adj = idpo.dpoi_index,
9103         },
9104     };
9105     lfe = fib_table_entry_path_add(lfib_index,
9106                                    &pfx_3500,
9107                                    FIB_SOURCE_API,
9108                                    FIB_ENTRY_FLAG_MULTICAST,
9109                                    DPO_PROTO_IP4,
9110                                    NULL,
9111                                    5, // rpf-id
9112                                    0, // default table
9113                                    0,
9114                                    NULL,
9115                                    FIB_ROUTE_PATH_RPF_ID);
9116     FIB_TEST(!fib_test_validate_entry(lfe,
9117                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
9118                                       3,
9119                                       &mc_0,
9120                                       &mc_disp,
9121                                       &mc_intf_0),
9122              "3500 via replicate over 10.10.10.1 and interface-rx");
9123
9124
9125
9126     fib_table_entry_delete(fib_index, &pfx_3500, FIB_SOURCE_API);
9127     dpo_reset(&idpo);
9128
9129     /*
9130      * cleanup
9131      */
9132     mpls_sw_interface_enable_disable(&mpls_main,
9133                                      tm->hw[0]->sw_if_index,
9134                                      0);
9135     mpls_table_delete(MPLS_FIB_DEFAULT_TABLE_ID, FIB_SOURCE_API);
9136
9137     FIB_TEST(0 == pool_elts(mpls_disp_dpo_pool),
9138              "mpls_disp_dpo resources freed %d of %d",
9139              0, pool_elts(mpls_disp_dpo_pool));
9140     FIB_TEST(lb_count == pool_elts(load_balance_pool),
9141              "Load-balance resources freed %d of %d",
9142              lb_count, pool_elts(load_balance_pool));
9143     FIB_TEST(0 == pool_elts(interface_rx_dpo_pool),
9144              "interface_rx_dpo resources freed %d of %d",
9145              0, pool_elts(interface_rx_dpo_pool));
9146
9147     return (res);
9148 }
9149
9150 static int
9151 fib_test_inherit (void)
9152 {
9153     fib_node_index_t fei;
9154     int n_feis, res, i;
9155     test_main_t *tm;
9156
9157     tm = &test_main;
9158     res = 0;
9159
9160     for (i = 0; i <= 2; i++)
9161       {
9162         fib_table_bind (FIB_PROTOCOL_IP4, tm->hw[i]->sw_if_index, 0);
9163         fib_table_bind (FIB_PROTOCOL_IP6, tm->hw[i]->sw_if_index, 0);
9164       }
9165     n_feis = fib_entry_pool_size();
9166
9167     const ip46_address_t nh_10_10_10_1 = {
9168         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
9169     };
9170     const ip46_address_t nh_10_10_10_2 = {
9171         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
9172     };
9173     const ip46_address_t nh_10_10_10_3 = {
9174         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a03),
9175     };
9176     const ip46_address_t nh_10_10_10_16 = {
9177         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a10),
9178     };
9179     const ip46_address_t nh_10_10_10_20 = {
9180         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a14),
9181     };
9182     const ip46_address_t nh_10_10_10_21 = {
9183         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a15),
9184     };
9185     const ip46_address_t nh_10_10_10_22 = {
9186         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a16),
9187     };
9188     const ip46_address_t nh_10_10_10_255 = {
9189         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0aff),
9190     };
9191     const ip46_address_t nh_10_10_10_0 = {
9192         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a00),
9193     };
9194     const ip46_address_t nh_10_10_0_0 = {
9195         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0000),
9196     };
9197     const ip46_address_t nh_11_11_11_11 = {
9198         .ip4.as_u32 = clib_host_to_net_u32(0x0b0b0b0b),
9199     };
9200     const ip46_address_t nh_11_11_11_0 = {
9201         .ip4.as_u32 = clib_host_to_net_u32(0x0b0b0b00),
9202     };
9203
9204     /*
9205      * prefixes at the base of a sub-tree
9206      */
9207     const fib_prefix_t pfx_10_10_10_21_s_32 = {
9208         .fp_len = 32,
9209         .fp_proto = FIB_PROTOCOL_IP4,
9210         .fp_addr = nh_10_10_10_21,
9211     };
9212     const fib_prefix_t pfx_10_10_10_22_s_32 = {
9213         .fp_len = 32,
9214         .fp_proto = FIB_PROTOCOL_IP4,
9215         .fp_addr = nh_10_10_10_22,
9216     };
9217     const fib_prefix_t pfx_10_10_10_255_s_32 = {
9218         .fp_len = 32,
9219         .fp_proto = FIB_PROTOCOL_IP4,
9220         .fp_addr = nh_10_10_10_255,
9221     };
9222     const u32 N_PLS = fib_path_list_pool_size();
9223
9224     fib_table_entry_special_add(0,
9225                                 &pfx_10_10_10_21_s_32,
9226                                 FIB_SOURCE_CLI,
9227                                 FIB_ENTRY_FLAG_DROP);
9228     fib_table_entry_special_add(0,
9229                                 &pfx_10_10_10_22_s_32,
9230                                 FIB_SOURCE_CLI,
9231                                 FIB_ENTRY_FLAG_DROP);
9232     fib_table_entry_special_add(0,
9233                                 &pfx_10_10_10_255_s_32,
9234                                 FIB_SOURCE_CLI,
9235                                 FIB_ENTRY_FLAG_DROP);
9236
9237     /*
9238      * source an entry that pushes its state down the sub-tree
9239      */
9240     const fib_prefix_t pfx_10_10_10_16_s_28 = {
9241         .fp_len = 28,
9242         .fp_proto = FIB_PROTOCOL_IP4,
9243         .fp_addr = nh_10_10_10_16,
9244     };
9245     fib_table_entry_update_one_path(0,
9246                                     &pfx_10_10_10_16_s_28,
9247                                     FIB_SOURCE_API,
9248                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9249                                     DPO_PROTO_IP4,
9250                                     &nh_10_10_10_1,
9251                                     tm->hw[0]->sw_if_index,
9252                                     ~0,
9253                                     1,
9254                                     NULL,
9255                                     FIB_ROUTE_PATH_FLAG_NONE);
9256
9257     /*
9258      * this covering entry and all those below it should have
9259      * the same forwarding information.
9260      */
9261     adj_index_t ai_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
9262                                                     VNET_LINK_IP4,
9263                                                     &nh_10_10_10_1,
9264                                                     tm->hw[0]->sw_if_index);
9265     fib_test_lb_bucket_t adj_o_10_10_10_1 = {
9266         .type = FT_LB_ADJ,
9267         .adj = {
9268             .adj = ai_10_10_10_1,
9269         },
9270     };
9271
9272     fei = fib_table_lookup(0, &pfx_10_10_10_16_s_28);
9273     FIB_TEST(!fib_test_validate_entry(fei,
9274                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9275                                       1,
9276                                       &adj_o_10_10_10_1),
9277              "%U via 10.10.10.1",
9278              format_fib_prefix, &pfx_10_10_10_16_s_28);
9279     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9280     FIB_TEST(!fib_test_validate_entry(fei,
9281                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9282                                       1,
9283                                       &adj_o_10_10_10_1),
9284              "%U via 10.10.10.1",
9285              format_fib_prefix, &pfx_10_10_10_21_s_32);
9286     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9287     FIB_TEST(!fib_test_validate_entry(fei,
9288                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9289                                       1,
9290                                       &adj_o_10_10_10_1),
9291              "%U via 10.10.10.1",
9292              format_fib_prefix, &pfx_10_10_10_22_s_32);
9293     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9294     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9295              "%U resolves via drop",
9296              format_fib_prefix, &pfx_10_10_10_255_s_32);
9297
9298     /*
9299      * remove the inherting cover - covereds go back to drop
9300      */
9301     fib_table_entry_delete(0, &pfx_10_10_10_16_s_28, FIB_SOURCE_API);
9302
9303     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9304     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9305              "%U resolves via drop",
9306              format_fib_prefix, &pfx_10_10_10_21_s_32);
9307
9308     /*
9309      * source an entry that pushes its state down the sub-tree
9310      */
9311     const fib_prefix_t pfx_10_10_10_0_s_24 = {
9312         .fp_len = 24,
9313         .fp_proto = FIB_PROTOCOL_IP4,
9314         .fp_addr = nh_10_10_10_0,
9315     };
9316     fib_table_entry_update_one_path(0,
9317                                     &pfx_10_10_10_0_s_24,
9318                                     FIB_SOURCE_API,
9319                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9320                                     DPO_PROTO_IP4,
9321                                     &nh_10_10_10_1,
9322                                     tm->hw[0]->sw_if_index,
9323                                     ~0,
9324                                     1,
9325                                     NULL,
9326                                     FIB_ROUTE_PATH_FLAG_NONE);
9327
9328     /*
9329      * whole sub-tree now covered
9330      */
9331     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9332     FIB_TEST(!fib_test_validate_entry(fei,
9333                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9334                                       1,
9335                                       &adj_o_10_10_10_1),
9336              "%U via 10.10.10.1",
9337              format_fib_prefix, &pfx_10_10_10_0_s_24);
9338     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9339     FIB_TEST(!fib_test_validate_entry(fei,
9340                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9341                                       1,
9342                                       &adj_o_10_10_10_1),
9343              "%U via 10.10.10.1",
9344              format_fib_prefix, &pfx_10_10_10_21_s_32);
9345     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9346     FIB_TEST(!fib_test_validate_entry(fei,
9347                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9348                                       1,
9349                                       &adj_o_10_10_10_1),
9350              "%U via 10.10.10.1",
9351              format_fib_prefix, &pfx_10_10_10_22_s_32);
9352     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9353     FIB_TEST(!fib_test_validate_entry(fei,
9354                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9355                                       1,
9356                                       &adj_o_10_10_10_1),
9357              "%U via 10.10.10.1",
9358              format_fib_prefix, &pfx_10_10_10_255_s_32);
9359
9360     /*
9361      * insert a more specific into the sub-tree - expect inheritance
9362      *  this one is directly covered by the root
9363      */
9364     fib_table_entry_special_add(0,
9365                                 &pfx_10_10_10_16_s_28,
9366                                 FIB_SOURCE_CLI,
9367                                 FIB_ENTRY_FLAG_DROP);
9368     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
9369     FIB_TEST(!fib_test_validate_entry(fei,
9370                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9371                                       1,
9372                                       &adj_o_10_10_10_1),
9373              "%U via 10.10.10.1",
9374              format_fib_prefix, &pfx_10_10_10_16_s_28);
9375
9376     /*
9377      * insert a more specific into the sub-tree - expect inheritance
9378      *  this one is indirectly covered by the root
9379      */
9380     const fib_prefix_t pfx_10_10_10_20_s_30 = {
9381         .fp_len = 30,
9382         .fp_proto = FIB_PROTOCOL_IP4,
9383         .fp_addr = nh_10_10_10_20,
9384     };
9385     fib_table_entry_special_add(0,
9386                                 &pfx_10_10_10_20_s_30,
9387                                 FIB_SOURCE_CLI,
9388                                 FIB_ENTRY_FLAG_DROP);
9389     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_20_s_30);
9390     FIB_TEST(!fib_test_validate_entry(fei,
9391                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9392                                       1,
9393                                       &adj_o_10_10_10_1),
9394              "%U via 10.10.10.1",
9395              format_fib_prefix, &pfx_10_10_10_20_s_30);
9396
9397     /*
9398      * remove the prefix from the middle of the sub-tree
9399      *  the inherited source will be the only one remaining - expect
9400      *  it to be withdrawn and hence the prefix is removed.
9401      */
9402     fib_table_entry_special_remove(0,
9403                                    &pfx_10_10_10_20_s_30,
9404                                    FIB_SOURCE_CLI);
9405     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_20_s_30);
9406     FIB_TEST((FIB_NODE_INDEX_INVALID == fei),
9407              "%U gone",
9408              format_fib_prefix, &pfx_10_10_10_20_s_30);
9409
9410     /*
9411      * inheriting source is modifed - expect the modification to be present
9412      *  throughout the sub-tree
9413      */
9414     adj_index_t ai_10_10_10_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
9415                                                     VNET_LINK_IP4,
9416                                                     &nh_10_10_10_2,
9417                                                     tm->hw[0]->sw_if_index);
9418     fib_test_lb_bucket_t adj_o_10_10_10_2 = {
9419         .type = FT_LB_ADJ,
9420         .adj = {
9421             .adj = ai_10_10_10_2,
9422         },
9423     };
9424
9425     fib_table_entry_update_one_path(0,
9426                                     &pfx_10_10_10_0_s_24,
9427                                     FIB_SOURCE_API,
9428                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9429                                     DPO_PROTO_IP4,
9430                                     &nh_10_10_10_2,
9431                                     tm->hw[0]->sw_if_index,
9432                                     ~0,
9433                                     1,
9434                                     NULL,
9435                                     FIB_ROUTE_PATH_FLAG_NONE);
9436     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9437     FIB_TEST(!fib_test_validate_entry(fei,
9438                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9439                                       1,
9440                                       &adj_o_10_10_10_2),
9441              "%U via 10.10.10.2",
9442              format_fib_prefix, &pfx_10_10_10_21_s_32);
9443     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9444     FIB_TEST(!fib_test_validate_entry(fei,
9445                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9446                                       1,
9447                                       &adj_o_10_10_10_2),
9448              "%U via 10.10.10.2",
9449              format_fib_prefix, &pfx_10_10_10_22_s_32);
9450     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9451     FIB_TEST(!fib_test_validate_entry(fei,
9452                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9453                                       1,
9454                                       &adj_o_10_10_10_2),
9455              "%U via 10.10.10.2",
9456              format_fib_prefix, &pfx_10_10_10_255_s_32);
9457     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9458     FIB_TEST(!fib_test_validate_entry(fei,
9459                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9460                                       1,
9461                                       &adj_o_10_10_10_2),
9462              "%U via 10.10.10.2",
9463              format_fib_prefix, &pfx_10_10_10_0_s_24);
9464
9465     fib_source_t hi_src = fib_source_allocate("test", 0x50,
9466                                               FIB_SOURCE_BH_SIMPLE);
9467
9468     /*
9469      * add the source that replaces inherited state.
9470      * inheriting source is not the best, so it doesn't push state.
9471      */
9472     fib_table_entry_update_one_path(0,
9473                                     &pfx_10_10_10_0_s_24,
9474                                     hi_src,
9475                                     FIB_ENTRY_FLAG_NONE,
9476                                     DPO_PROTO_IP4,
9477                                     &nh_10_10_10_1,
9478                                     tm->hw[0]->sw_if_index,
9479                                     ~0,
9480                                     1,
9481                                     NULL,
9482                                     FIB_ROUTE_PATH_FLAG_NONE);
9483     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9484     FIB_TEST(!fib_test_validate_entry(fei,
9485                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9486                                       1,
9487                                       &adj_o_10_10_10_1),
9488              "%U via 10.10.10.1",
9489              format_fib_prefix, &pfx_10_10_10_0_s_24);
9490
9491     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9492     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9493              "%U resolves via drop",
9494              format_fib_prefix, &pfx_10_10_10_21_s_32);
9495     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9496     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9497              "%U resolves via drop",
9498              format_fib_prefix, &pfx_10_10_10_22_s_32);
9499     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9500     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9501              "%U resolves via drop",
9502              format_fib_prefix, &pfx_10_10_10_255_s_32);
9503     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
9504     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9505              "%U resolves via drop",
9506              format_fib_prefix, &pfx_10_10_10_16_s_28);
9507
9508     /*
9509      * withdraw the higher priority source and expect the inherited to return
9510      * throughout the sub-tree
9511      */
9512     fib_table_entry_delete(0, &pfx_10_10_10_0_s_24, hi_src);
9513
9514     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9515     FIB_TEST(!fib_test_validate_entry(fei,
9516                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9517                                       1,
9518                                       &adj_o_10_10_10_2),
9519              "%U via 10.10.10.2",
9520              format_fib_prefix, &pfx_10_10_10_21_s_32);
9521     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9522     FIB_TEST(!fib_test_validate_entry(fei,
9523                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9524                                       1,
9525                                       &adj_o_10_10_10_2),
9526              "%U via 10.10.10.2",
9527              format_fib_prefix, &pfx_10_10_10_22_s_32);
9528     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9529     FIB_TEST(!fib_test_validate_entry(fei,
9530                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9531                                       1,
9532                                       &adj_o_10_10_10_2),
9533              "%U via 10.10.10.2",
9534              format_fib_prefix, &pfx_10_10_10_255_s_32);
9535     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9536     FIB_TEST(!fib_test_validate_entry(fei,
9537                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9538                                       1,
9539                                       &adj_o_10_10_10_2),
9540              "%U via 10.10.10.2",
9541              format_fib_prefix, &pfx_10_10_10_0_s_24);
9542     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
9543     FIB_TEST(!fib_test_validate_entry(fei,
9544                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9545                                       1,
9546                                       &adj_o_10_10_10_2),
9547              "%U via 10.10.10.2",
9548              format_fib_prefix, &pfx_10_10_10_16_s_28);
9549
9550     /*
9551      * source a covered entry in the sub-tree with the same inherting source
9552      *  - expect that it now owns the sub-tree and thus over-rides its cover
9553      */
9554     fib_table_entry_update_one_path(0,
9555                                     &pfx_10_10_10_16_s_28,
9556                                     FIB_SOURCE_API,
9557                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9558                                     DPO_PROTO_IP4,
9559                                     &nh_10_10_10_1,
9560                                     tm->hw[0]->sw_if_index,
9561                                     ~0,
9562                                     1,
9563                                     NULL,
9564                                     FIB_ROUTE_PATH_FLAG_NONE);
9565     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
9566     FIB_TEST(!fib_test_validate_entry(fei,
9567                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9568                                       1,
9569                                       &adj_o_10_10_10_1),
9570              "%U via 10.10.10.1",
9571              format_fib_prefix, &pfx_10_10_10_16_s_28);
9572     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9573     FIB_TEST(!fib_test_validate_entry(fei,
9574                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9575                                       1,
9576                                       &adj_o_10_10_10_1),
9577              "%U via 10.10.10.2",
9578              format_fib_prefix, &pfx_10_10_10_22_s_32);
9579     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9580     FIB_TEST(!fib_test_validate_entry(fei,
9581                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9582                                       1,
9583                                       &adj_o_10_10_10_1),
9584              "%U via 10.10.10.2",
9585              format_fib_prefix, &pfx_10_10_10_21_s_32);
9586
9587     /* these two unaffected by the sub-tree change */
9588     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9589     FIB_TEST(!fib_test_validate_entry(fei,
9590                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9591                                       1,
9592                                       &adj_o_10_10_10_2),
9593              "%U via 10.10.10.2",
9594              format_fib_prefix, &pfx_10_10_10_255_s_32);
9595     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9596     FIB_TEST(!fib_test_validate_entry(fei,
9597                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9598                                       1,
9599                                       &adj_o_10_10_10_2),
9600              "%U via 10.10.10.2",
9601              format_fib_prefix, &pfx_10_10_10_0_s_24);
9602
9603     /*
9604      * removes the more specific, expect the /24 to now re-owns the sub-tree
9605      */
9606     fib_table_entry_delete(0, &pfx_10_10_10_16_s_28, FIB_SOURCE_API);
9607
9608     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9609     FIB_TEST(!fib_test_validate_entry(fei,
9610                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9611                                       1,
9612                                       &adj_o_10_10_10_2),
9613              "%U via 10.10.10.2",
9614              format_fib_prefix, &pfx_10_10_10_16_s_28);
9615     FIB_TEST(!fib_test_validate_entry(fei,
9616                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9617                                       1,
9618                                       &adj_o_10_10_10_2),
9619              "%U via 10.10.10.2",
9620              format_fib_prefix, &pfx_10_10_10_21_s_32);
9621     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9622     FIB_TEST(!fib_test_validate_entry(fei,
9623                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9624                                       1,
9625                                       &adj_o_10_10_10_2),
9626              "%U via 10.10.10.2",
9627              format_fib_prefix, &pfx_10_10_10_22_s_32);
9628     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9629     FIB_TEST(!fib_test_validate_entry(fei,
9630                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9631                                       1,
9632                                       &adj_o_10_10_10_2),
9633              "%U via 10.10.10.2",
9634              format_fib_prefix, &pfx_10_10_10_255_s_32);
9635     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9636     FIB_TEST(!fib_test_validate_entry(fei,
9637                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9638                                       1,
9639                                       &adj_o_10_10_10_2),
9640              "%U via 10.10.10.2",
9641              format_fib_prefix, &pfx_10_10_10_0_s_24);
9642     /*
9643      * modify the /24. expect the new forwarding to be pushed down
9644      */
9645     fib_table_entry_update_one_path(0,
9646                                     &pfx_10_10_10_0_s_24,
9647                                     FIB_SOURCE_API,
9648                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9649                                     DPO_PROTO_IP4,
9650                                     &nh_10_10_10_1,
9651                                     tm->hw[0]->sw_if_index,
9652                                     ~0,
9653                                     1,
9654                                     NULL,
9655                                     FIB_ROUTE_PATH_FLAG_NONE);
9656     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9657     FIB_TEST(!fib_test_validate_entry(fei,
9658                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9659                                       1,
9660                                       &adj_o_10_10_10_1),
9661              "%U via 10.10.10.1",
9662              format_fib_prefix, &pfx_10_10_10_16_s_28);
9663     FIB_TEST(!fib_test_validate_entry(fei,
9664                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9665                                       1,
9666                                       &adj_o_10_10_10_1),
9667              "%U via 10.10.10.1",
9668              format_fib_prefix, &pfx_10_10_10_21_s_32);
9669     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9670     FIB_TEST(!fib_test_validate_entry(fei,
9671                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9672                                       1,
9673                                       &adj_o_10_10_10_1),
9674              "%U via 10.10.10.1",
9675              format_fib_prefix, &pfx_10_10_10_22_s_32);
9676     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9677     FIB_TEST(!fib_test_validate_entry(fei,
9678                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9679                                       1,
9680                                       &adj_o_10_10_10_1),
9681              "%U via 10.10.10.1",
9682              format_fib_prefix, &pfx_10_10_10_255_s_32);
9683     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9684     FIB_TEST(!fib_test_validate_entry(fei,
9685                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9686                                       1,
9687                                       &adj_o_10_10_10_1),
9688              "%U via 10.10.10.1",
9689              format_fib_prefix, &pfx_10_10_10_0_s_24);
9690
9691     /*
9692      * add an entry less specific to /24. it should not own the /24's tree
9693      */
9694     const fib_prefix_t pfx_10_10_0_0_s_16 = {
9695         .fp_len = 16,
9696         .fp_proto = FIB_PROTOCOL_IP4,
9697         .fp_addr = nh_10_10_0_0,
9698     };
9699     fib_table_entry_update_one_path(0,
9700                                     &pfx_10_10_0_0_s_16,
9701                                     FIB_SOURCE_API,
9702                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9703                                     DPO_PROTO_IP4,
9704                                     &nh_10_10_10_2,
9705                                     tm->hw[0]->sw_if_index,
9706                                     ~0,
9707                                     1,
9708                                     NULL,
9709                                     FIB_ROUTE_PATH_FLAG_NONE);
9710     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9711     FIB_TEST(!fib_test_validate_entry(fei,
9712                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9713                                       1,
9714                                       &adj_o_10_10_10_1),
9715              "%U via 10.10.10.1",
9716              format_fib_prefix, &pfx_10_10_10_16_s_28);
9717     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9718     FIB_TEST(!fib_test_validate_entry(fei,
9719                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9720                                       1,
9721                                       &adj_o_10_10_10_1),
9722              "%U via 10.10.10.1",
9723              format_fib_prefix, &pfx_10_10_10_22_s_32);
9724     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9725     FIB_TEST(!fib_test_validate_entry(fei,
9726                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9727                                       1,
9728                                       &adj_o_10_10_10_1),
9729              "%U via 10.10.10.1",
9730              format_fib_prefix, &pfx_10_10_10_255_s_32);
9731     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9732     FIB_TEST(!fib_test_validate_entry(fei,
9733                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9734                                       1,
9735                                       &adj_o_10_10_10_1),
9736              "%U via 10.10.10.1",
9737              format_fib_prefix, &pfx_10_10_10_0_s_24);
9738     fei = fib_table_lookup_exact_match(0, &pfx_10_10_0_0_s_16);
9739     FIB_TEST(!fib_test_validate_entry(fei,
9740                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9741                                       1,
9742                                       &adj_o_10_10_10_2),
9743              "%U via 10.10.10.2",
9744              format_fib_prefix, &pfx_10_10_0_0_s_16);
9745
9746     /*
9747      * Add/remove an interposer source to a new /32
9748      */
9749     const fib_prefix_t pfx_11_11_11_11_s_32 = {
9750         .fp_len = 32,
9751         .fp_proto = FIB_PROTOCOL_IP4,
9752         .fp_addr = nh_11_11_11_11,
9753     };
9754
9755     fib_table_entry_update_one_path(0,
9756                                     &pfx_11_11_11_11_s_32,
9757                                     FIB_SOURCE_API,
9758                                     FIB_ENTRY_FLAG_NONE,
9759                                     DPO_PROTO_IP4,
9760                                     &nh_10_10_10_3,
9761                                     tm->hw[0]->sw_if_index,
9762                                     ~0,
9763                                     1,
9764                                     NULL,
9765                                     FIB_ROUTE_PATH_FLAG_NONE);
9766
9767     dpo_id_t interposer = DPO_INVALID;
9768     fib_mpls_label_t *l99 = NULL, fml_99 = {
9769         .fml_value = 99,
9770     };
9771     vec_add1(l99, fml_99);
9772
9773     mpls_label_dpo_create(l99,
9774                           MPLS_EOS,
9775                           DPO_PROTO_IP4,
9776                           MPLS_LABEL_DPO_FLAG_NONE,
9777                           punt_dpo_get(DPO_PROTO_MPLS),
9778                           &interposer);
9779
9780     adj_index_t ai_10_10_10_3 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
9781                                                     VNET_LINK_IP4,
9782                                                     &nh_10_10_10_3,
9783                                                     tm->hw[0]->sw_if_index);
9784     fib_test_lb_bucket_t adj_o_10_10_10_3 = {
9785         .type = FT_LB_ADJ,
9786         .adj = {
9787             .adj = ai_10_10_10_3,
9788         },
9789     };
9790     fib_test_lb_bucket_t l99_o_10_10_10_3 = {
9791         .type = FT_LB_LABEL_O_ADJ,
9792         .label_o_adj = {
9793             .adj = ai_10_10_10_3,
9794             .label = 99,
9795             .eos = MPLS_EOS,
9796         },
9797     };
9798
9799     fei = fib_table_entry_special_dpo_add(0,
9800                                           &pfx_11_11_11_11_s_32,
9801                                           FIB_SOURCE_SPECIAL,
9802                                           FIB_ENTRY_FLAG_INTERPOSE,
9803                                           &interposer);
9804     FIB_TEST(!fib_test_validate_entry(fei,
9805                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9806                                       1,
9807                                       &l99_o_10_10_10_3),
9808              "%U via interposer adj",
9809              format_fib_prefix,&pfx_11_11_11_11_s_32);
9810
9811     fib_table_entry_special_remove(0,
9812                                    &pfx_11_11_11_11_s_32,
9813                                    FIB_SOURCE_SPECIAL);
9814     FIB_TEST(!fib_test_validate_entry(fei,
9815                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9816                                       1,
9817                                       &adj_o_10_10_10_3),
9818              "%U via 10.10.10.1",
9819              format_fib_prefix, &pfx_11_11_11_11_s_32);
9820     dpo_reset(&interposer);
9821     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API);
9822
9823     /*
9824      * add an interposer to a source with path-extensions
9825      */
9826     fib_mpls_label_t *l3300 = NULL, fml_3300 = {
9827         .fml_value = 3300,
9828     };
9829     vec_add1(l3300, fml_3300);
9830     fib_table_entry_update_one_path(0,
9831                                     &pfx_11_11_11_11_s_32,
9832                                     FIB_SOURCE_API,
9833                                     FIB_ENTRY_FLAG_NONE,
9834                                     DPO_PROTO_IP4,
9835                                     &nh_10_10_10_3,
9836                                     tm->hw[0]->sw_if_index,
9837                                     ~0,
9838                                     1,
9839                                     l3300,
9840                                     FIB_ROUTE_PATH_FLAG_NONE);
9841
9842     mpls_label_dpo_create(l99,
9843                           MPLS_EOS,
9844                           DPO_PROTO_IP4,
9845                           MPLS_LABEL_DPO_FLAG_NONE,
9846                           punt_dpo_get(DPO_PROTO_MPLS),
9847                           &interposer);
9848
9849     adj_index_t ai_mpls_10_10_10_3 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
9850                                                          VNET_LINK_MPLS,
9851                                                          &nh_10_10_10_3,
9852                                                          tm->hw[0]->sw_if_index);
9853     fib_test_lb_bucket_t l3300_o_10_10_10_3 = {
9854         .type = FT_LB_LABEL_O_ADJ,
9855         .label_o_adj = {
9856             .adj = ai_mpls_10_10_10_3,
9857             .label = 3300,
9858             .eos = MPLS_EOS,
9859         },
9860     };
9861     fib_test_lb_bucket_t lchain_o_10_10_10_3 = {
9862         .type = FT_LB_LABEL_CHAIN_O_ADJ,
9863         .label_chain_o_adj = {
9864             .adj = ai_mpls_10_10_10_3,
9865             .label_chain_size = 2,
9866             .label_chain = {
9867                 99, 3300
9868             },
9869             .eos = MPLS_EOS,
9870         },
9871     };
9872
9873     fei = fib_table_entry_special_dpo_add(0,
9874                                           &pfx_11_11_11_11_s_32,
9875                                           FIB_SOURCE_SPECIAL,
9876                                           FIB_ENTRY_FLAG_INTERPOSE,
9877                                           &interposer);
9878
9879     FIB_TEST(!fib_test_validate_entry(fei,
9880                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9881                                       1,
9882                                       &lchain_o_10_10_10_3),
9883              "%U via interposer & mpls on adj",
9884              format_fib_prefix, &pfx_11_11_11_11_s_32);
9885
9886     fib_table_entry_special_remove(0,
9887                                    &pfx_11_11_11_11_s_32,
9888                                    FIB_SOURCE_SPECIAL);
9889     FIB_TEST(!fib_test_validate_entry(fei,
9890                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9891                                       1,
9892                                       &l3300_o_10_10_10_3),
9893              "%U via 10.10.10.1",
9894              format_fib_prefix, &pfx_11_11_11_11_s_32);
9895     adj_unlock(ai_mpls_10_10_10_3);
9896
9897     /*
9898      * remove and re-add the second best API source while the interpose
9899      * is present
9900      */
9901     fei = fib_table_entry_special_dpo_add(0,
9902                                           &pfx_11_11_11_11_s_32,
9903                                           FIB_SOURCE_SPECIAL,
9904                                           FIB_ENTRY_FLAG_INTERPOSE,
9905                                           &interposer);
9906     FIB_TEST(!fib_test_validate_entry(fei,
9907                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9908                                       1,
9909                                       &lchain_o_10_10_10_3),
9910              "%U via interposer adj",
9911              format_fib_prefix,&pfx_11_11_11_11_s_32);
9912
9913     FIB_TEST(3 == pool_elts(mpls_label_dpo_pool),
9914              "MPLS label pool: %d",
9915              pool_elts(mpls_label_dpo_pool));
9916
9917     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API);
9918
9919     /*
9920      * the interpose does not get stacked when there are not valid paths
9921      */
9922     fib_test_lb_bucket_t bucket_drop = {
9923         .type = FT_LB_DROP,
9924         .special = {
9925             .adj = DPO_PROTO_IP4,
9926         },
9927     };
9928     FIB_TEST(!fib_test_validate_entry(fei,
9929                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9930                                       1,
9931                                       &bucket_drop),
9932              "%U via drop",
9933              format_fib_prefix,&pfx_11_11_11_11_s_32);
9934
9935     fib_table_entry_update_one_path(0,
9936                                     &pfx_11_11_11_11_s_32,
9937                                     FIB_SOURCE_API,
9938                                     FIB_ENTRY_FLAG_NONE,
9939                                     DPO_PROTO_IP4,
9940                                     &nh_10_10_10_3,
9941                                     tm->hw[0]->sw_if_index,
9942                                     ~0,
9943                                     1,
9944                                     NULL,
9945                                     FIB_ROUTE_PATH_FLAG_NONE);
9946     FIB_TEST(!fib_test_validate_entry(fei,
9947                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9948                                       1,
9949                                       &l99_o_10_10_10_3),
9950              "%U via interposer adj",
9951              format_fib_prefix,&pfx_11_11_11_11_s_32);
9952     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API);
9953
9954     /*
9955      * add a cover for the interposed entry, so that we test it selects
9956      * the covers forwarding.
9957      */
9958     const fib_prefix_t pfx_11_11_11_0_s_24 = {
9959         .fp_len = 24,
9960         .fp_proto = FIB_PROTOCOL_IP4,
9961         .fp_addr = nh_11_11_11_0,
9962     };
9963     fib_table_entry_update_one_path(0,
9964                                     &pfx_11_11_11_0_s_24,
9965                                     FIB_SOURCE_API,
9966                                     FIB_ENTRY_FLAG_NONE,
9967                                     DPO_PROTO_IP4,
9968                                     &nh_10_10_10_3,
9969                                     tm->hw[0]->sw_if_index,
9970                                     ~0,
9971                                     1,
9972                                     NULL,
9973                                     FIB_ROUTE_PATH_FLAG_NONE);
9974     FIB_TEST(!fib_test_validate_entry(fei,
9975                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9976                                       1,
9977                                       &l99_o_10_10_10_3),
9978              "%U via interposer adj",
9979              format_fib_prefix,&pfx_11_11_11_11_s_32);
9980
9981     /*
9982      * multiple interpose sources on the same entry. Only the high
9983      * priority source gets to add the interpose.
9984      */
9985     fib_table_entry_update_one_path(0,
9986                                     &pfx_11_11_11_11_s_32,
9987                                     FIB_SOURCE_API,
9988                                     FIB_ENTRY_FLAG_NONE,
9989                                     DPO_PROTO_IP4,
9990                                     &nh_10_10_10_3,
9991                                     tm->hw[0]->sw_if_index,
9992                                     ~0,
9993                                     1,
9994                                     NULL,
9995                                     FIB_ROUTE_PATH_FLAG_NONE);
9996
9997     dpo_id_t interposer2 = DPO_INVALID;
9998     fib_mpls_label_t *l100 = NULL, fml_100 = {
9999         .fml_value = 100,
10000     };
10001     vec_add1(l100, fml_100);
10002
10003     mpls_label_dpo_create(l100,
10004                           MPLS_EOS,
10005                           DPO_PROTO_IP4,
10006                           MPLS_LABEL_DPO_FLAG_NONE,
10007                           punt_dpo_get(DPO_PROTO_MPLS),
10008                           &interposer2);
10009
10010     fei = fib_table_entry_special_dpo_add(0,
10011                                           &pfx_11_11_11_11_s_32,
10012                                           FIB_SOURCE_CLASSIFY,
10013                                           FIB_ENTRY_FLAG_INTERPOSE,
10014                                           &interposer2);
10015
10016     fib_test_lb_bucket_t lc100_o_10_10_10_3 = {
10017         .type = FT_LB_LABEL_CHAIN_O_ADJ,
10018         .label_chain_o_adj = {
10019             .adj = ai_10_10_10_3,
10020             .label_chain_size = 2,
10021             .label_chain = {
10022                 99, 100
10023             },
10024             .eos = MPLS_EOS,
10025         },
10026     };
10027
10028     FIB_TEST(!fib_test_validate_entry(fei,
10029                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10030                                       1,
10031                                       &lc100_o_10_10_10_3),
10032              "%U via interposer label 99",
10033              format_fib_prefix,&pfx_11_11_11_11_s_32);
10034
10035     fib_test_lb_bucket_t l100_o_10_10_10_3 = {
10036         .type = FT_LB_LABEL_O_ADJ,
10037         .label_o_adj = {
10038             .adj = ai_10_10_10_3,
10039             .label = 100,
10040             .eos = MPLS_EOS,
10041         },
10042     };
10043
10044     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_SPECIAL);
10045
10046     FIB_TEST(!fib_test_validate_entry(fei,
10047                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10048                                       1,
10049                                       &l100_o_10_10_10_3),
10050              "%U via interposer label 99",
10051              format_fib_prefix,&pfx_11_11_11_11_s_32);
10052
10053     fib_table_entry_delete(0, &pfx_11_11_11_0_s_24, FIB_SOURCE_API);
10054     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API);
10055     FIB_TEST(!fib_test_validate_entry(fei,
10056                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10057                                       1,
10058                                       &bucket_drop),
10059              "%U via drop",
10060              format_fib_prefix,&pfx_11_11_11_11_s_32);
10061     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_CLASSIFY);
10062
10063     /*
10064      * update a source to/from interpose.
10065      */
10066     /* fib_table_entry_update_one_path(0, */
10067     /*                                 &pfx_11_11_11_0_s_24, */
10068     /*                              FIB_SOURCE_API, */
10069     /*                              FIB_ENTRY_FLAG_NONE, */
10070     /*                              DPO_PROTO_IP4, */
10071     /*                                 &nh_10_10_10_3, */
10072     /*                              tm->hw[0]->sw_if_index, */
10073     /*                              ~0, */
10074     /*                              1, */
10075     /*                              NULL, */
10076     /*                              FIB_ROUTE_PATH_FLAG_NONE); */
10077     /* fei = fib_table_entry_special_dpo_add(0, */
10078     /*                                       &pfx_11_11_11_11_s_32, */
10079     /*                                       FIB_SOURCE_API, */
10080     /*                                       FIB_ENTRY_FLAG_INTERPOSE, */
10081     /*                                       &interposer); */
10082     /* FIB_TEST(!fib_test_validate_entry(fei, */
10083     /*                                   FIB_FORW_CHAIN_TYPE_UNICAST_IP4, */
10084     /*                                   1, */
10085     /*                                   &l99_o_10_10_10_3), */
10086     /*          "%U via interposer label 99", */
10087     /*          format_fib_prefix,&pfx_11_11_11_11_s_32); */
10088
10089     /* FIB_TEST(3 == pool_elts(mpls_label_dpo_pool), */
10090     /*          "MPLS label pool: %d", */
10091     /*          pool_elts(mpls_label_dpo_pool)); */
10092     /* FIB_TEST((2 == mpls_label_dpo_get(interposer.dpoi_index)->mld_locks), */
10093     /*          "Interposer %d locks", */
10094     /*          mpls_label_dpo_get(interposer.dpoi_index)->mld_locks); */
10095
10096     /* fib_table_entry_update_one_path(0, */
10097     /*                                 &pfx_11_11_11_11_s_32, */
10098     /*                              FIB_SOURCE_API, */
10099     /*                              FIB_ENTRY_FLAG_NONE, */
10100     /*                              DPO_PROTO_IP4, */
10101     /*                                 &nh_10_10_10_2, */
10102     /*                              tm->hw[0]->sw_if_index, */
10103     /*                              ~0, */
10104     /*                              1, */
10105     /*                              NULL, */
10106     /*                              FIB_ROUTE_PATH_FLAG_NONE); */
10107     /* FIB_TEST(!fib_test_validate_entry(fei, */
10108     /*                                   FIB_FORW_CHAIN_TYPE_UNICAST_IP4, */
10109     /*                                   1, */
10110     /*                                   &adj_o_10_10_10_2), */
10111     /*          "%U via 10.10.10.2", */
10112     /*          format_fib_prefix,&pfx_11_11_11_11_s_32); */
10113
10114     /* FIB_TEST((1 == mpls_label_dpo_get(interposer.dpoi_index)->mld_locks), */
10115     /*          "Interposer %d locks", */
10116     /*          mpls_label_dpo_get(interposer.dpoi_index)->mld_locks); */
10117     /* FIB_TEST(2 == pool_elts(mpls_label_dpo_pool), */
10118     /*          "MPLS label pool: %d", */
10119     /*          pool_elts(mpls_label_dpo_pool)); */
10120
10121     /* fei = fib_table_entry_special_dpo_add(0, */
10122     /*                                       &pfx_11_11_11_11_s_32, */
10123     /*                                       FIB_SOURCE_API, */
10124     /*                                       FIB_ENTRY_FLAG_INTERPOSE, */
10125     /*                                       &interposer); */
10126     /* FIB_TEST(!fib_test_validate_entry(fei, */
10127     /*                                   FIB_FORW_CHAIN_TYPE_UNICAST_IP4, */
10128     /*                                   1, */
10129     /*                                   &l99_o_10_10_10_3), */
10130     /*          "%U via interposer label 99", */
10131     /*          format_fib_prefix,&pfx_11_11_11_11_s_32); */
10132
10133     /* fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API); */
10134
10135     /*
10136      * Add/remove an interposer source from the top of the subtrie. The
10137      * interposer source is not inherited.
10138      */
10139     fib_table_entry_update_one_path(0,
10140                                     &pfx_10_10_10_0_s_24,
10141                                     FIB_SOURCE_API,
10142                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
10143                                     DPO_PROTO_IP4,
10144                                     &nh_10_10_10_3,
10145                                     tm->hw[0]->sw_if_index,
10146                                     ~0,
10147                                     1,
10148                                     NULL,
10149                                     FIB_ROUTE_PATH_FLAG_NONE);
10150     fei = fib_table_entry_special_dpo_add(0,
10151                                           &pfx_10_10_10_0_s_24,
10152                                           FIB_SOURCE_SPECIAL,
10153                                           FIB_ENTRY_FLAG_INTERPOSE,
10154                                           &interposer);
10155     FIB_TEST(!fib_test_validate_entry(fei,
10156                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10157                                       1,
10158                                       &l99_o_10_10_10_3),
10159              "%U via interposer label",
10160              format_fib_prefix,&pfx_10_10_10_0_s_24);
10161     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
10162     FIB_TEST(!fib_test_validate_entry(fei,
10163                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10164                                       1,
10165                                       &bucket_drop),
10166              "%U via drop",
10167              format_fib_prefix, &pfx_10_10_10_21_s_32);
10168
10169     fib_table_entry_special_remove(0,
10170                                    &pfx_10_10_10_0_s_24,
10171                                    FIB_SOURCE_SPECIAL);
10172     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
10173     FIB_TEST(!fib_test_validate_entry(fei,
10174                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10175                                       1,
10176                                       &adj_o_10_10_10_3),
10177              "%U via 10.10.10.1",
10178              format_fib_prefix, &pfx_10_10_10_0_s_24);
10179     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
10180     FIB_TEST(!fib_test_validate_entry(fei,
10181                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10182                                       1,
10183                                       &adj_o_10_10_10_3),
10184              "%U via via 10.10.10.1",
10185              format_fib_prefix, &pfx_10_10_10_21_s_32);
10186
10187     /*
10188      * Add/remove an interposer source from the top of the subtrie. The
10189      * interposer source is inherited.
10190      */
10191     fei = fib_table_entry_special_dpo_add(0,
10192                                           &pfx_10_10_10_0_s_24,
10193                                           FIB_SOURCE_SPECIAL,
10194                                           (FIB_ENTRY_FLAG_COVERED_INHERIT |
10195                                            FIB_ENTRY_FLAG_INTERPOSE),
10196                                           &interposer);
10197     FIB_TEST(!fib_test_validate_entry(fei,
10198                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10199                                       1,
10200                                       &l99_o_10_10_10_3),
10201              "%U via interposer label",
10202              format_fib_prefix,&pfx_10_10_10_0_s_24);
10203
10204     /* interposer gets forwarding from the drop cli source */
10205     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
10206     FIB_TEST(!fib_test_validate_entry(fei,
10207                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10208                                       1,
10209                                       &bucket_drop),
10210              "%U via drop",
10211              format_fib_prefix,&pfx_10_10_10_21_s_32);
10212
10213     fib_table_entry_update_one_path(0,
10214                                     &pfx_10_10_10_21_s_32,
10215                                     FIB_SOURCE_API,
10216                                     FIB_ENTRY_FLAG_NONE,
10217                                     DPO_PROTO_IP4,
10218                                     &nh_10_10_10_3,
10219                                     tm->hw[0]->sw_if_index,
10220                                     ~0,
10221                                     1,
10222                                     NULL,
10223                                     FIB_ROUTE_PATH_FLAG_NONE);
10224     fib_table_entry_delete(0, &pfx_10_10_10_21_s_32, FIB_SOURCE_CLI);
10225     /* interposer gets forwarding from the API source */
10226     FIB_TEST(!fib_test_validate_entry(fei,
10227                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10228                                       1,
10229                                       &l99_o_10_10_10_3),
10230              "%U via interposer label",
10231              format_fib_prefix,&pfx_10_10_10_21_s_32);
10232
10233     /*
10234      * cleanup
10235      */
10236     fib_table_entry_delete(0, &pfx_10_10_10_22_s_32, FIB_SOURCE_CLI);
10237     fib_table_entry_delete(0, &pfx_10_10_10_21_s_32, FIB_SOURCE_API);
10238     fib_table_entry_delete(0, &pfx_10_10_10_16_s_28, FIB_SOURCE_CLI);
10239     fib_table_entry_delete(0, &pfx_10_10_10_255_s_32, FIB_SOURCE_CLI);
10240     fib_table_entry_delete(0, &pfx_10_10_10_0_s_24, FIB_SOURCE_API);
10241     fib_table_entry_delete(0, &pfx_10_10_0_0_s_16, FIB_SOURCE_API);
10242     fib_table_entry_delete(0, &pfx_10_10_10_0_s_24, FIB_SOURCE_SPECIAL);
10243     adj_unlock(ai_10_10_10_1);
10244     adj_unlock(ai_10_10_10_2);
10245     adj_unlock(ai_10_10_10_3);
10246     dpo_reset(&interposer);
10247     dpo_reset(&interposer2);
10248     FIB_TEST(0 == pool_elts(mpls_label_dpo_pool),
10249              "MPLS label pool empty: %d",
10250              pool_elts(mpls_label_dpo_pool));
10251     FIB_TEST(0 == adj_nbr_db_size(), "All adjacencies removed");
10252     FIB_TEST(N_PLS == fib_path_list_pool_size(),
10253              "number of path-lists: %d = %d",
10254              N_PLS, fib_path_list_pool_size());
10255
10256     /*
10257      * test the v6 tree walk.
10258      * a /64 that covers everything. a /96 that covers one /128
10259      * a second /128 covered only by the /64.
10260      */
10261     const fib_prefix_t pfx_2001_s_64 = {
10262         .fp_len = 64,
10263         .fp_proto = FIB_PROTOCOL_IP6,
10264         .fp_addr = {
10265             .ip6 = {
10266                 .as_u64 = {
10267                     [0] = clib_host_to_net_u64(0x2001000000000000),
10268                     [1] = clib_host_to_net_u64(0x0000000000000000),
10269                 },
10270             },
10271         },
10272     };
10273     const fib_prefix_t pfx_2001_1_s_96 = {
10274         .fp_len = 96,
10275         .fp_proto = FIB_PROTOCOL_IP6,
10276         .fp_addr = {
10277             .ip6 = {
10278                 .as_u64 = {
10279                     [0] = clib_host_to_net_u64(0x2001000000000000),
10280                     [1] = clib_host_to_net_u64(0x1000000000000000),
10281                 },
10282             },
10283         },
10284     };
10285     const fib_prefix_t pfx_2001_1_1_s_128 = {
10286         .fp_len = 128,
10287         .fp_proto = FIB_PROTOCOL_IP6,
10288         .fp_addr = {
10289             .ip6 = {
10290                 .as_u64 = {
10291                     [0] = clib_host_to_net_u64(0x2001000000000000),
10292                     [1] = clib_host_to_net_u64(0x1000000000000001),
10293                 },
10294             },
10295         },
10296     };
10297     const fib_prefix_t pfx_2001_0_1_s_128 = {
10298         .fp_len = 128,
10299         .fp_proto = FIB_PROTOCOL_IP6,
10300         .fp_addr = {
10301             .ip6 = {
10302                 .as_u64 = {
10303                     [0] = clib_host_to_net_u64(0x2001000000000000),
10304                     [1] = clib_host_to_net_u64(0x0000000000000001),
10305                 },
10306             },
10307         },
10308     };
10309     const ip46_address_t nh_3000_1 = {
10310         .ip6 = {
10311             .as_u64 = {
10312                 [0] = clib_host_to_net_u64(0x3000000000000000),
10313                 [1] = clib_host_to_net_u64(0x0000000000000001),
10314             },
10315         },
10316     };
10317     const ip46_address_t nh_3000_2 = {
10318         .ip6 = {
10319             .as_u64 = {
10320                 [0] = clib_host_to_net_u64(0x3000000000000000),
10321                 [1] = clib_host_to_net_u64(0x0000000000000002),
10322             },
10323         },
10324     };
10325     adj_index_t ai_3000_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
10326                                                 VNET_LINK_IP6,
10327                                                 &nh_3000_1,
10328                                                 tm->hw[0]->sw_if_index);
10329     adj_index_t ai_3000_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
10330                                                 VNET_LINK_IP6,
10331                                                 &nh_3000_2,
10332                                                 tm->hw[0]->sw_if_index);
10333     fib_test_lb_bucket_t adj_o_3000_1 = {
10334         .type = FT_LB_ADJ,
10335         .adj = {
10336             .adj = ai_3000_1,
10337         },
10338     };
10339     fib_test_lb_bucket_t adj_o_3000_2 = {
10340         .type = FT_LB_ADJ,
10341         .adj = {
10342             .adj = ai_3000_2,
10343         },
10344     };
10345
10346     fib_table_entry_special_add(0,
10347                                 &pfx_2001_0_1_s_128,
10348                                 FIB_SOURCE_CLI,
10349                                 FIB_ENTRY_FLAG_DROP);
10350     fib_table_entry_special_add(0,
10351                                 &pfx_2001_1_1_s_128,
10352                                 FIB_SOURCE_CLI,
10353                                 FIB_ENTRY_FLAG_DROP);
10354
10355     /*
10356      * /96 has inherited forwarding pushed down to its covered /128
10357      */
10358     fib_table_entry_update_one_path(0,
10359                                     &pfx_2001_1_s_96,
10360                                     FIB_SOURCE_API,
10361                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
10362                                     DPO_PROTO_IP6,
10363                                     &nh_3000_1,
10364                                     tm->hw[0]->sw_if_index,
10365                                     ~0,
10366                                     1,
10367                                     NULL,
10368                                     FIB_ROUTE_PATH_FLAG_NONE);
10369     fei = fib_table_lookup_exact_match(0, &pfx_2001_1_s_96);
10370     FIB_TEST(!fib_test_validate_entry(fei,
10371                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10372                                       1,
10373                                       &adj_o_3000_1),
10374              "%U via 3000::1",
10375              format_fib_prefix, &pfx_2001_1_s_96);
10376     fei = fib_table_lookup_exact_match(0, &pfx_2001_1_1_s_128);
10377     FIB_TEST(!fib_test_validate_entry(fei,
10378                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10379                                       1,
10380                                       &adj_o_3000_1),
10381              "%U via 3000::1",
10382              format_fib_prefix, &pfx_2001_1_1_s_128);
10383     fei = fib_table_lookup_exact_match(0, &pfx_2001_0_1_s_128);
10384     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
10385              "%U resolves via drop",
10386              format_fib_prefix, &pfx_2001_0_1_s_128);
10387
10388     /*
10389      * /64 has inherited forwarding pushed down to all, but the /96
10390      * and its sub-tree remain unaffected.
10391      */
10392     fib_table_entry_update_one_path(0,
10393                                     &pfx_2001_s_64,
10394                                     FIB_SOURCE_API,
10395                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
10396                                     DPO_PROTO_IP6,
10397                                     &nh_3000_2,
10398                                     tm->hw[0]->sw_if_index,
10399                                     ~0,
10400                                     1,
10401                                     NULL,
10402                                     FIB_ROUTE_PATH_FLAG_NONE);
10403
10404     fei = fib_table_lookup_exact_match(0, &pfx_2001_s_64);
10405     FIB_TEST(!fib_test_validate_entry(fei,
10406                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10407                                       1,
10408                                       &adj_o_3000_2),
10409              "%U via 3000::2",
10410              format_fib_prefix, &pfx_2001_s_64);
10411     fei = fib_table_lookup_exact_match(0, &pfx_2001_0_1_s_128);
10412     FIB_TEST(!fib_test_validate_entry(fei,
10413                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10414                                       1,
10415                                       &adj_o_3000_2),
10416              "%U via 3000::1",
10417              format_fib_prefix, &pfx_2001_0_1_s_128);
10418
10419     fei = fib_table_lookup_exact_match(0, &pfx_2001_1_s_96);
10420     FIB_TEST(!fib_test_validate_entry(fei,
10421                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10422                                       1,
10423                                       &adj_o_3000_1),
10424              "%U via 3000::1",
10425              format_fib_prefix, &pfx_2001_1_s_96);
10426     fei = fib_table_lookup_exact_match(0, &pfx_2001_1_1_s_128);
10427     FIB_TEST(!fib_test_validate_entry(fei,
10428                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10429                                       1,
10430                                       &adj_o_3000_1),
10431              "%U via 3000::1",
10432              format_fib_prefix, &pfx_2001_1_1_s_128);
10433
10434     /*
10435      * Cleanup
10436      */
10437     fib_table_entry_delete(0, &pfx_2001_0_1_s_128, FIB_SOURCE_CLI);
10438     fib_table_entry_delete(0, &pfx_2001_1_1_s_128, FIB_SOURCE_CLI);
10439     fib_table_entry_delete(0, &pfx_2001_s_64,      FIB_SOURCE_API);
10440     fib_table_entry_delete(0, &pfx_2001_1_s_96,    FIB_SOURCE_API);
10441     adj_unlock(ai_3000_1);
10442     adj_unlock(ai_3000_2);
10443
10444     /*
10445      * test no-one left behind
10446      */
10447     FIB_TEST((n_feis == fib_entry_pool_size()), "Entries gone");
10448     FIB_TEST(0 == adj_nbr_db_size(), "All adjacencies removed");
10449
10450     return (res);
10451 }
10452
10453 static int
10454 fib_test_sticky (void)
10455 {
10456     fib_route_path_t *r_paths = NULL;
10457     test_main_t *tm = &test_main;
10458     u32 ii, lb_count, pl_count;
10459     dpo_id_t dpo = DPO_INVALID;
10460     fib_node_index_t pl_index;
10461     int res = 0;
10462 #define N_PATHS 16
10463
10464     fib_test_lb_bucket_t buckets[N_PATHS];
10465     bfd_session_t bfds[N_PATHS] = {{0}};
10466
10467     lb_count = pool_elts(load_balance_pool);
10468     pl_count = fib_path_list_pool_size();
10469
10470     for (ii = 0; ii < N_PATHS; ii++)
10471     {
10472         ip46_address_t nh = {
10473             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02 + ii),
10474         };
10475         adj_index_t ai;
10476
10477         ai = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
10478                                  VNET_LINK_IP4,
10479                                  &nh, tm->hw[0]->sw_if_index);
10480
10481         buckets[ii].type = FT_LB_ADJ;
10482         buckets[ii].adj.adj = ai;
10483
10484         bfds[ii].udp.key.peer_addr = nh;
10485         bfds[ii].udp.key.sw_if_index = tm->hw[0]->sw_if_index;
10486         bfds[ii].hop_type = BFD_HOP_TYPE_SINGLE;
10487         bfds[ii].local_state = BFD_STATE_init;
10488         adj_bfd_notify(BFD_LISTEN_EVENT_CREATE, &bfds[ii]);
10489         bfds[ii].local_state = BFD_STATE_up;
10490         adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[ii]);
10491     }
10492
10493     for (ii = 0; ii < N_PATHS; ii++)
10494     {
10495         fib_route_path_t r_path = {
10496             .frp_proto = DPO_PROTO_IP4,
10497             .frp_addr = {
10498                 .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02 + ii),
10499             },
10500             .frp_sw_if_index = tm->hw[0]->sw_if_index,
10501             .frp_weight = 1,
10502             .frp_fib_index = ~0,
10503         };
10504         vec_add1(r_paths, r_path);
10505     };
10506
10507     pl_index = fib_path_list_create(FIB_PATH_LIST_FLAG_SHARED, r_paths);
10508     fib_path_list_lock(pl_index);
10509
10510     fib_path_list_contribute_forwarding(pl_index,
10511                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10512                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10513                                         &dpo);
10514
10515     FIB_TEST(!fib_test_validate_lb(&dpo,
10516                                    16,
10517                                    &buckets[0],
10518                                    &buckets[1],
10519                                    &buckets[2],
10520                                    &buckets[3],
10521                                    &buckets[4],
10522                                    &buckets[5],
10523                                    &buckets[6],
10524                                    &buckets[7],
10525                                    &buckets[8],
10526                                    &buckets[9],
10527                                    &buckets[10],
10528                                    &buckets[11],
10529                                    &buckets[12],
10530                                    &buckets[13],
10531                                    &buckets[14],
10532                                    &buckets[15]),
10533              "Setup OK");
10534
10535     /* take down paths */
10536     bfds[0].local_state = BFD_STATE_down;
10537     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[0]);
10538
10539     fib_path_list_contribute_forwarding(pl_index,
10540                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10541                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10542                                         &dpo);
10543
10544     FIB_TEST(!fib_test_validate_lb(&dpo,
10545                                    16,
10546                                    &buckets[1],
10547                                    &buckets[1],
10548                                    &buckets[2],
10549                                    &buckets[3],
10550                                    &buckets[4],
10551                                    &buckets[5],
10552                                    &buckets[6],
10553                                    &buckets[7],
10554                                    &buckets[8],
10555                                    &buckets[9],
10556                                    &buckets[10],
10557                                    &buckets[11],
10558                                    &buckets[12],
10559                                    &buckets[13],
10560                                    &buckets[14],
10561                                    &buckets[15]),
10562              "Failed at shut-down path 0");
10563
10564     bfds[7].local_state = BFD_STATE_down;
10565     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[7]);
10566
10567     fib_path_list_contribute_forwarding(pl_index,
10568                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10569                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10570                                         &dpo);
10571
10572     FIB_TEST(!fib_test_validate_lb(&dpo,
10573                                    16,
10574                                    &buckets[1],
10575                                    &buckets[1],
10576                                    &buckets[2],
10577                                    &buckets[3],
10578                                    &buckets[4],
10579                                    &buckets[5],
10580                                    &buckets[6],
10581                                    &buckets[2],
10582                                    &buckets[8],
10583                                    &buckets[9],
10584                                    &buckets[10],
10585                                    &buckets[11],
10586                                    &buckets[12],
10587                                    &buckets[13],
10588                                    &buckets[14],
10589                                    &buckets[15]),
10590              "Failed at shut-down path 7");
10591
10592     /* paths back up */
10593     bfds[0].local_state = BFD_STATE_up;
10594     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[0]);
10595     bfds[7].local_state = BFD_STATE_up;
10596     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[7]);
10597
10598     fib_path_list_contribute_forwarding(pl_index,
10599                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10600                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10601                                         &dpo);
10602
10603     FIB_TEST(!fib_test_validate_lb(&dpo,
10604                                    16,
10605                                    &buckets[0],
10606                                    &buckets[1],
10607                                    &buckets[2],
10608                                    &buckets[3],
10609                                    &buckets[4],
10610                                    &buckets[5],
10611                                    &buckets[6],
10612                                    &buckets[7],
10613                                    &buckets[8],
10614                                    &buckets[9],
10615                                    &buckets[10],
10616                                    &buckets[11],
10617                                    &buckets[12],
10618                                    &buckets[13],
10619                                    &buckets[14],
10620                                    &buckets[15]),
10621              "recovery OK");
10622
10623     fib_path_list_unlock(pl_index);
10624
10625     /*
10626      * non-power of 2 number of buckets
10627      */
10628     fib_route_path_t *r_paths2 = NULL;
10629
10630     r_paths2 = vec_dup(r_paths);
10631     vec_set_len (r_paths2, 3);
10632
10633     pl_index = fib_path_list_create(FIB_PATH_LIST_FLAG_SHARED, r_paths2);
10634     fib_path_list_lock(pl_index);
10635
10636     fib_path_list_contribute_forwarding(pl_index,
10637                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10638                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10639                                         &dpo);
10640
10641     FIB_TEST(!fib_test_validate_lb(&dpo,
10642                                    16,
10643                                    &buckets[0],
10644                                    &buckets[0],
10645                                    &buckets[0],
10646                                    &buckets[0],
10647                                    &buckets[0],
10648                                    &buckets[0],
10649                                    &buckets[1],
10650                                    &buckets[1],
10651                                    &buckets[1],
10652                                    &buckets[1],
10653                                    &buckets[1],
10654                                    &buckets[2],
10655                                    &buckets[2],
10656                                    &buckets[2],
10657                                    &buckets[2],
10658                                    &buckets[2]),
10659              "non-power of 2");
10660
10661     bfds[1].local_state = BFD_STATE_down;
10662     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[1]);
10663
10664     fib_path_list_contribute_forwarding(pl_index,
10665                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10666                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10667                                         &dpo);
10668
10669     /*
10670      * path 1's buckets alternate between path 0 and 2
10671      */
10672     FIB_TEST(!fib_test_validate_lb(&dpo,
10673                                    16,
10674                                    &buckets[0],
10675                                    &buckets[0],
10676                                    &buckets[0],
10677                                    &buckets[0],
10678                                    &buckets[0],
10679                                    &buckets[0],
10680                                    &buckets[0],
10681                                    &buckets[2],
10682                                    &buckets[0],
10683                                    &buckets[2],
10684                                    &buckets[0],
10685                                    &buckets[2],
10686                                    &buckets[2],
10687                                    &buckets[2],
10688                                    &buckets[2],
10689                                    &buckets[2]),
10690              "non-power of 2");
10691     bfds[1].local_state = BFD_STATE_up;
10692     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[1]);
10693
10694     fib_path_list_unlock(pl_index);
10695
10696     /*
10697      * unequal cost
10698      */
10699     fib_route_path_t *r_paths3 = NULL;
10700
10701     r_paths3 = vec_dup(r_paths);
10702     vec_set_len (r_paths3, 3);
10703
10704     r_paths3[0].frp_weight = 3;
10705
10706     pl_index = fib_path_list_create(FIB_PATH_LIST_FLAG_SHARED, r_paths3);
10707     fib_path_list_lock(pl_index);
10708
10709     fib_path_list_contribute_forwarding(pl_index,
10710                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10711                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10712                                         &dpo);
10713
10714     FIB_TEST(!fib_test_validate_lb(&dpo,
10715                                    16,
10716                                    &buckets[1],
10717                                    &buckets[1],
10718                                    &buckets[1],
10719                                    &buckets[2],
10720                                    &buckets[2],
10721                                    &buckets[2],
10722                                    &buckets[0],
10723                                    &buckets[0],
10724                                    &buckets[0],
10725                                    &buckets[0],
10726                                    &buckets[0],
10727                                    &buckets[0],
10728                                    &buckets[0],
10729                                    &buckets[0],
10730                                    &buckets[0],
10731                                    &buckets[0]),
10732              "UCMP");
10733
10734     bfds[1].local_state = BFD_STATE_down;
10735     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[1]);
10736
10737     fib_path_list_contribute_forwarding(pl_index,
10738                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10739                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10740                                         &dpo);
10741     /* No attempt to Un-equal distribute the down path's buckets */
10742     FIB_TEST(!fib_test_validate_lb(&dpo,
10743                                    16,
10744                                    &buckets[2],
10745                                    &buckets[0],
10746                                    &buckets[2],
10747                                    &buckets[2],
10748                                    &buckets[2],
10749                                    &buckets[2],
10750                                    &buckets[0],
10751                                    &buckets[0],
10752                                    &buckets[0],
10753                                    &buckets[0],
10754                                    &buckets[0],
10755                                    &buckets[0],
10756                                    &buckets[0],
10757                                    &buckets[0],
10758                                    &buckets[0],
10759                                    &buckets[0]),
10760              "UCMP");
10761     bfds[1].local_state = BFD_STATE_up;
10762     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[1]);
10763
10764     dpo_reset(&dpo);
10765     fib_path_list_unlock(pl_index);
10766
10767     vec_free(r_paths);
10768     vec_free(r_paths2);
10769     vec_free(r_paths3);
10770
10771     FIB_TEST(lb_count == pool_elts(load_balance_pool), "no leaked LBs");
10772     FIB_TEST(pl_count == fib_path_list_pool_size(), "no leaked PLs");
10773
10774     return 0;
10775 }
10776
10777 static clib_error_t *
10778 fib_test (vlib_main_t * vm,
10779           unformat_input_t * input,
10780           vlib_cli_command_t * cmd_arg)
10781 {
10782     int res;
10783
10784     res = 0;
10785
10786     fib_test_mk_intf(4);
10787
10788     if (unformat (input, "debug"))
10789     {
10790         fib_test_do_debug = 1;
10791     }
10792
10793     if (unformat (input, "ip4"))
10794     {
10795         res += fib_test_v4();
10796     }
10797     else if (unformat (input, "ip6"))
10798     {
10799         res += fib_test_v6();
10800     }
10801     else if (unformat (input, "ip"))
10802     {
10803         res += fib_test_v4();
10804         res += fib_test_v6();
10805     }
10806     else if (unformat (input, "label"))
10807     {
10808         res += fib_test_label();
10809     }
10810     else if (unformat (input, "ae"))
10811     {
10812         res += fib_test_ae();
10813     }
10814     else if (unformat (input, "pref"))
10815     {
10816         res += fib_test_pref();
10817     }
10818     else if (unformat (input, "lfib"))
10819     {
10820         res += lfib_test();
10821     }
10822     else if (unformat (input, "walk"))
10823     {
10824         res += fib_test_walk();
10825     }
10826     else if (unformat (input, "bfd"))
10827     {
10828         res += fib_test_bfd();
10829     }
10830     else if (unformat (input, "inherit"))
10831     {
10832         res += fib_test_inherit();
10833     }
10834     else if (unformat (input, "sticky"))
10835     {
10836         res += fib_test_sticky();
10837     }
10838     else
10839     {
10840         res += fib_test_v4();
10841         res += fib_test_v6();
10842         res += fib_test_ae();
10843         res += fib_test_bfd();
10844         res += fib_test_pref();
10845         res += fib_test_label();
10846         res += fib_test_inherit();
10847         res += lfib_test();
10848
10849         /*
10850          * fib-walk process must be disabled in order for the walk tests to work
10851          */
10852         fib_walk_process_disable();
10853         res += fib_test_walk();
10854         fib_walk_process_enable();
10855     }
10856
10857     fflush(NULL);
10858     if (res)
10859     {
10860         return clib_error_return(0, "FIB Unit Test Failed");
10861     }
10862     else
10863     {
10864         return (NULL);
10865     }
10866 }
10867
10868 VLIB_CLI_COMMAND (test_fib_command, static) = {
10869     .path = "test fib",
10870     .short_help = "fib unit tests - DO NOT RUN ON A LIVE SYSTEM",
10871     .function = fib_test,
10872 };
10873
10874 clib_error_t *
10875 fib_test_init (vlib_main_t *vm)
10876 {
10877     return 0;
10878 }
10879
10880 VLIB_INIT_FUNCTION (fib_test_init);
10881
10882 // clang-format on