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         hw_address[5] = i;
 146
 147         error = ethernet_register_interface(vnet_get_main(),
 148                                             test_interface_device_class.index,
 149                                             i /* instance */,
 150                                             hw_address,
 151                                             &tm->hw_if_indicies[i],
 152                                             /* flag change */ 0);
 153
 154         FIB_TEST((NULL == error), "ADD interface %d", i);
 155
 156         error = vnet_hw_interface_set_flags(vnet_get_main(),
 157                                             tm->hw_if_indicies[i],
 158                                             VNET_HW_INTERFACE_FLAG_LINK_UP);
 159         tm->hw[i] = vnet_get_hw_interface(vnet_get_main(),
 160                                           tm->hw_if_indicies[i]);
 161         ip4_main.fib_index_by_sw_if_index[tm->hw[i]->sw_if_index] = 0;
 162         ip6_main.fib_index_by_sw_if_index[tm->hw[i]->sw_if_index] = 0;
 163
 164         error = vnet_sw_interface_set_flags(vnet_get_main(),
 165                                             tm->hw[i]->sw_if_index,
 166                                             VNET_SW_INTERFACE_FLAG_ADMIN_UP);
 167         FIB_TEST((NULL == error), "UP interface %d", i);
 168     }
 169     /*
 170      * re-eval after the inevitable realloc
 171      */
 172     for (i = 0; i < ninterfaces; i++)
 173     {
 174         tm->hw[i] = vnet_get_hw_interface(vnet_get_main(),
 175                                           tm->hw_if_indicies[i]);
 176     }
 177
 178     return (res);
 179 }
 180
 181 #define FIB_TEST_REC_FORW(_rec_prefix, _via_prefix, _bucket)            \
 182     {                                                                   \
 183         const dpo_id_t *_rec_dpo = fib_entry_contribute_ip_forwarding(  \
 184             fib_table_lookup_exact_match(fib_index, (_rec_prefix)));    \
 185         const dpo_id_t *_via_dpo = fib_entry_contribute_ip_forwarding(  \
 186             fib_table_lookup(fib_index, (_via_prefix)));                \
 187         FIB_TEST(!dpo_cmp(_via_dpo,                                     \
 188                           load_balance_get_bucket(_rec_dpo->dpoi_index, \
 189                                                   _bucket)),            \
 190                  "%U is recursive via %U",                              \
 191                  format_fib_prefix, (_rec_prefix),                      \
 192                  format_fib_prefix, _via_prefix);                       \
 193     }
 194
 195 #define FIB_TEST_LB_BUCKET_VIA_ADJ(_prefix, _bucket, _ai)               \
 196     {                                                                   \
 197      const dpo_id_t *_dpo = fib_entry_contribute_ip_forwarding(         \
 198                                                                fib_table_lookup_exact_match(fib_index, (_prefix))); \
 199      const dpo_id_t *_dpo1 =                                            \
 200          load_balance_get_bucket(_dpo->dpoi_index, _bucket);            \
 201      FIB_TEST(DPO_ADJACENCY == _dpo1->dpoi_type, "type is %U",          \
 202                   format_dpo_type, _dpo1->dpoi_type);                   \
 203      FIB_TEST((_ai == _dpo1->dpoi_index),                               \
 204                   "%U bucket %d resolves via %U",                       \
 205                   format_fib_prefix, (_prefix),                         \
 206                   _bucket,                                              \
 207                   format_dpo_id, _dpo1, 0);                             \
 208      }
 209
 210 #define FIB_TEST_RPF(_cond, _comment, _args...)         \
 211     {                                                   \
 212         if (FIB_TEST_I(_cond, _comment, ##_args)) {     \
 213             res = 1;                                    \
 214             goto cleanup;                               \
 215         }                                               \
 216     }
 217
 218 static int
 219 fib_test_urpf_is_equal (fib_node_index_t fei,
 220                         fib_forward_chain_type_t fct,
 221                         u32 num, ...)
 222 {
 223     dpo_id_t dpo = DPO_INVALID;
 224     fib_urpf_list_t *urpf;
 225     int ii, res;
 226     index_t ui;
 227     va_list ap;
 228
 229     va_start(ap, num);
 230
 231     res = 0;
 232     fib_entry_contribute_forwarding(fei, fct, &dpo);
 233     ui = load_balance_get_urpf(dpo.dpoi_index);
 234
 235     urpf = fib_urpf_list_get(ui);
 236
 237     FIB_TEST_RPF(num == vec_len(urpf->furpf_itfs),
 238                  "RPF:%U len %d == %d",
 239                  format_fib_urpf_list, ui,
 240                  num, vec_len(urpf->furpf_itfs));
 241     FIB_TEST_RPF(num == fib_urpf_check_size(ui),
 242                  "RPF:%U check-size %d == %d",
 243                  format_fib_urpf_list, ui,
 244                  num, vec_len(urpf->furpf_itfs));
 245
 246     for (ii = 0; ii < num; ii++)
 247     {
 248         adj_index_t ai = va_arg(ap, adj_index_t);
 249
 250         FIB_TEST_RPF(ai == urpf->furpf_itfs[ii],
 251                      "RPF:%d item:%d - %d == %d",
 252                      ui, ii, ai, urpf->furpf_itfs[ii]);
 253         FIB_TEST_RPF(fib_urpf_check(ui, ai),
 254                      "RPF:%d %d found",
 255                      ui, ai);
 256     }
 257
 258     dpo_reset(&dpo);
 259
 260 cleanup:
 261     va_end(ap);
 262
 263     return (res);
 264 }
 265
 266 static u8*
 267 fib_test_build_rewrite (u8 *eth_addr)
 268 {
 269     u8* rewrite = NULL;
 270
 271     vec_validate(rewrite, 13);
 272
 273     memcpy(rewrite, eth_addr, 6);
 274     memcpy(rewrite+6, eth_addr, 6);
 275
 276     return (rewrite);
 277 }
 278
 279 #define FIB_TEST_LB(_cond, _comment, _args...)          \
 280     {                                                   \
 281         if (FIB_TEST_I(_cond, _comment, ##_args)) {     \
 282             return (1);                                 \
 283         }                                               \
 284     }
 285
 286 int
 287 fib_test_validate_rep_v (const replicate_t *rep,
 288                          u16 n_buckets,
 289                          va_list *ap)
 290 {
 291     const fib_test_rep_bucket_t *exp;
 292     const dpo_id_t *dpo;
 293     int bucket, res;
 294
 295     res = 0;
 296     FIB_TEST_LB((n_buckets == rep->rep_n_buckets),
 297                 "n_buckets = %d", rep->rep_n_buckets);
 298
 299     for (bucket = 0; bucket < n_buckets; bucket++)
 300     {
 301         exp = va_arg(*ap, fib_test_rep_bucket_t*);
 302
 303         dpo = replicate_get_bucket_i(rep, bucket);
 304
 305         switch (exp->type)
 306         {
 307         case FT_REP_LABEL_O_ADJ:
 308             {
 309                 const mpls_label_dpo_t *mld;
 310                 mpls_label_t hdr;
 311
 312                 FIB_TEST_LB((mpls_label_dpo_get_type(MPLS_LABEL_DPO_FLAG_NONE)
 313                              == dpo->dpoi_type),
 314                             "bucket %d stacks on %U",
 315                             bucket,
 316                             format_dpo_type, dpo->dpoi_type);
 317
 318                 mld = mpls_label_dpo_get(dpo->dpoi_index);
 319                 hdr = clib_net_to_host_u32(mld->mld_hdr[0].label_exp_s_ttl);
 320
 321                 FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 322                              exp->label_o_adj.label),
 323                             "bucket %d stacks on label %d",
 324                             bucket,
 325                             exp->label_o_adj.label);
 326
 327                 FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) ==
 328                              exp->label_o_adj.eos),
 329                             "bucket %d stacks on label %d %U",
 330                             bucket,
 331                             exp->label_o_adj.label,
 332                             format_mpls_eos_bit, exp->label_o_adj.eos);
 333
 334                 FIB_TEST_LB((DPO_ADJACENCY_INCOMPLETE == mld->mld_dpo.dpoi_type),
 335                             "bucket %d label stacks on %U",
 336                             bucket,
 337                             format_dpo_type, mld->mld_dpo.dpoi_type);
 338
 339                 FIB_TEST_LB((exp->label_o_adj.adj == mld->mld_dpo.dpoi_index),
 340                             "bucket %d label stacks on adj %d",
 341                             bucket,
 342                             exp->label_o_adj.adj);
 343             }
 344             break;
 345         case FT_REP_INTF:
 346             FIB_TEST_LB((DPO_INTERFACE_RX == dpo->dpoi_type),
 347                         "bucket %d stacks on %U",
 348                         bucket,
 349                         format_dpo_type, dpo->dpoi_type);
 350
 351             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 352                         "bucket %d stacks on adj %d",
 353                         bucket,
 354                         exp->adj.adj);
 355             break;
 356         case FT_REP_DISP_MFIB_LOOKUP:
 357 //            ASSERT(0);
 358             break;
 359         }
 360     }
 361
 362     return (res);
 363 }
 364
 365 int
 366 fib_test_validate_lb_v (const load_balance_t *lb,
 367                         int n_buckets,
 368                         va_list *ap)
 369 {
 370     const dpo_id_t *dpo;
 371     int bucket, res;
 372
 373     res = 0;
 374     FIB_TEST_LB((n_buckets == lb->lb_n_buckets), "n_buckets = %d", lb->lb_n_buckets);
 375
 376     for (bucket = 0; bucket < n_buckets; bucket++)
 377     {
 378         const fib_test_lb_bucket_t *exp;
 379
 380         exp = va_arg(*ap, fib_test_lb_bucket_t*);
 381         dpo = load_balance_get_bucket_i(lb, bucket);
 382
 383         switch (exp->type)
 384         {
 385         case FT_LB_LABEL_STACK_O_ADJ:
 386             {
 387                 const mpls_label_dpo_t *mld;
 388                 mpls_label_dpo_flags_t mf;
 389                 mpls_label_t hdr;
 390                 u32 ii;
 391
 392                 mf = ((exp->label_stack_o_adj.mode ==
 393                        FIB_MPLS_LSP_MODE_UNIFORM) ?
 394                       MPLS_LABEL_DPO_FLAG_UNIFORM_MODE :
 395                       MPLS_LABEL_DPO_FLAG_NONE);
 396                 FIB_TEST_LB((mpls_label_dpo_get_type(mf) == dpo->dpoi_type),
 397                            "bucket %d stacks on %U",
 398                            bucket,
 399                            format_dpo_type, dpo->dpoi_type);
 400
 401                 mld = mpls_label_dpo_get(dpo->dpoi_index);
 402
 403                 FIB_TEST_LB(exp->label_stack_o_adj.label_stack_size == mld->mld_n_labels,
 404                             "label stack size",
 405                             mld->mld_n_labels);
 406
 407                 for (ii = 0; ii < mld->mld_n_labels; ii++)
 408                 {
 409                     hdr = clib_net_to_host_u32(mld->mld_hdr[ii].label_exp_s_ttl);
 410                     FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 411                                  exp->label_stack_o_adj.label_stack[ii]),
 412                                 "bucket %d stacks on label %d",
 413                                 bucket,
 414                                 exp->label_stack_o_adj.label_stack[ii]);
 415
 416                     if (ii == mld->mld_n_labels-1)
 417                     {
 418                         FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) ==
 419                                      exp->label_o_adj.eos),
 420                                     "bucket %d stacks on label %d %U!=%U",
 421                                     bucket,
 422                                     exp->label_stack_o_adj.label_stack[ii],
 423                                     format_mpls_eos_bit, exp->label_o_adj.eos,
 424                                     format_mpls_eos_bit, vnet_mpls_uc_get_s(hdr));
 425                     }
 426                     else
 427                     {
 428                         FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) == MPLS_NON_EOS),
 429                                     "bucket %d stacks on label %d %U",
 430                                     bucket,
 431                                     exp->label_stack_o_adj.label_stack[ii],
 432                                     format_mpls_eos_bit, vnet_mpls_uc_get_s(hdr));
 433                     }
 434                 }
 435
 436                 FIB_TEST_LB((DPO_ADJACENCY_INCOMPLETE == mld->mld_dpo.dpoi_type),
 437                             "bucket %d label stacks on %U",
 438                             bucket,
 439                             format_dpo_type, mld->mld_dpo.dpoi_type);
 440
 441                 FIB_TEST_LB((exp->label_stack_o_adj.adj == mld->mld_dpo.dpoi_index),
 442                             "bucket %d label stacks on adj %d",
 443                             bucket,
 444                             exp->label_stack_o_adj.adj);
 445             }
 446             break;
 447         case FT_LB_LABEL_CHAIN_O_ADJ:
 448             {
 449                 const mpls_label_dpo_t *mld = NULL;
 450                 mpls_label_dpo_flags_t mf;
 451                 mpls_label_t hdr;
 452                 u32 ii;
 453
 454                 mf = ((exp->label_chain_o_adj.mode ==
 455                        FIB_MPLS_LSP_MODE_UNIFORM) ?
 456                       MPLS_LABEL_DPO_FLAG_UNIFORM_MODE :
 457                       MPLS_LABEL_DPO_FLAG_NONE);
 458
 459                 for (ii = 0; ii < exp->label_chain_o_adj.label_chain_size; ii++)
 460                 {
 461                     FIB_TEST_LB((mpls_label_dpo_get_type(mf) == dpo->dpoi_type),
 462                                 "bucket %d stacks on %U",
 463                                 bucket,
 464                                 format_dpo_type, dpo->dpoi_type);
 465                     mld = mpls_label_dpo_get(dpo->dpoi_index);
 466
 467                     hdr = clib_net_to_host_u32(mld->mld_hdr[0].label_exp_s_ttl);
 468                     FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 469                                  exp->label_chain_o_adj.label_chain[ii]),
 470                                 "bucket %d stacks on label %d",
 471                                 bucket,
 472                                 exp->label_chain_o_adj.label_chain[ii]);
 473                     dpo = &mld->mld_dpo;
 474                 }
 475
 476                 FIB_TEST_LB((DPO_ADJACENCY_INCOMPLETE == mld->mld_dpo.dpoi_type),
 477                             "bucket %d label stacks on %U",
 478                             bucket,
 479                             format_dpo_type, mld->mld_dpo.dpoi_type);
 480
 481                 FIB_TEST_LB((exp->label_chain_o_adj.adj == mld->mld_dpo.dpoi_index),
 482                             "bucket %d label stacks on adj %d",
 483                             bucket,
 484                             exp->label_chain_o_adj.adj);
 485             }
 486             break;
 487         case FT_LB_LABEL_O_ADJ:
 488             {
 489                 const mpls_label_dpo_t *mld;
 490                 mpls_label_t hdr;
 491                 FIB_TEST_LB((mpls_label_dpo_get_type(MPLS_LABEL_DPO_FLAG_NONE)
 492                              == dpo->dpoi_type),
 493                            "bucket %d stacks on %U",
 494                            bucket,
 495                            format_dpo_type, dpo->dpoi_type);
 496
 497                 mld = mpls_label_dpo_get(dpo->dpoi_index);
 498                 hdr = clib_net_to_host_u32(mld->mld_hdr[0].label_exp_s_ttl);
 499
 500                 FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 501                              exp->label_o_adj.label),
 502                             "bucket %d stacks on label %d not %d",
 503                             bucket,
 504                             vnet_mpls_uc_get_label(hdr),
 505                             exp->label_o_adj.label);
 506
 507                 FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) ==
 508                              exp->label_o_adj.eos),
 509                             "bucket %d stacks on label %d %U",
 510                             bucket,
 511                             exp->label_o_adj.label,
 512                             format_mpls_eos_bit, exp->label_o_adj.eos);
 513
 514                 FIB_TEST_LB((DPO_ADJACENCY_INCOMPLETE == mld->mld_dpo.dpoi_type),
 515                             "bucket %d label stacks on %U",
 516                             bucket,
 517                             format_dpo_type, mld->mld_dpo.dpoi_type);
 518
 519                 FIB_TEST_LB((exp->label_o_adj.adj == mld->mld_dpo.dpoi_index),
 520                             "bucket %d label stacks on adj %d",
 521                             bucket,
 522                             exp->label_o_adj.adj);
 523             }
 524             break;
 525         case FT_LB_LABEL_O_LB:
 526             {
 527                 const mpls_label_dpo_t *mld;
 528                 mpls_label_dpo_flags_t mf;
 529                 mpls_label_t hdr;
 530
 531                 mf = ((exp->label_o_lb.mode ==
 532                        FIB_MPLS_LSP_MODE_UNIFORM) ?
 533                       MPLS_LABEL_DPO_FLAG_UNIFORM_MODE :
 534                       MPLS_LABEL_DPO_FLAG_NONE);
 535                 FIB_TEST_LB((mpls_label_dpo_get_type(mf) == dpo->dpoi_type),
 536                            "bucket %d stacks on %U",
 537                            bucket,
 538                            format_dpo_type, dpo->dpoi_type);
 539
 540                 mld = mpls_label_dpo_get(dpo->dpoi_index);
 541                 hdr = clib_net_to_host_u32(mld->mld_hdr[0].label_exp_s_ttl);
 542
 543                 FIB_TEST_LB(1 == mld->mld_n_labels, "label stack size",
 544                             mld->mld_n_labels);
 545                 FIB_TEST_LB((vnet_mpls_uc_get_label(hdr) ==
 546                              exp->label_o_lb.label),
 547                             "bucket %d stacks on label %d",
 548                             bucket,
 549                             exp->label_o_lb.label);
 550
 551                 FIB_TEST_LB((vnet_mpls_uc_get_s(hdr) ==
 552                              exp->label_o_lb.eos),
 553                             "bucket %d stacks on label %d %U",
 554                             bucket,
 555                             exp->label_o_lb.label,
 556                             format_mpls_eos_bit, exp->label_o_lb.eos);
 557
 558                 FIB_TEST_LB((DPO_LOAD_BALANCE == mld->mld_dpo.dpoi_type),
 559                             "bucket %d label stacks on %U",
 560                             bucket,
 561                             format_dpo_type, mld->mld_dpo.dpoi_type);
 562
 563                 FIB_TEST_LB((exp->label_o_lb.lb == mld->mld_dpo.dpoi_index),
 564                             "bucket %d label stacks on LB %d",
 565                             bucket,
 566                             exp->label_o_lb.lb);
 567             }
 568             break;
 569         case FT_LB_ADJ:
 570             res = FIB_TEST_I(((DPO_ADJACENCY == dpo->dpoi_type) ||
 571                               (DPO_ADJACENCY_INCOMPLETE == dpo->dpoi_type)),
 572                              "bucket %d stacks on %U",
 573                              bucket,
 574                              format_dpo_type, dpo->dpoi_type);
 575             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 576                         "bucket %d stacks on adj %d",
 577                         bucket,
 578                         exp->adj.adj);
 579             break;
 580         case FT_LB_MPLS_DISP_PIPE_O_ADJ:
 581         {
 582             const mpls_disp_dpo_t *mdd;
 583
 584             res = FIB_TEST_I((DPO_MPLS_DISPOSITION_PIPE == dpo->dpoi_type),
 585                        "bucket %d stacks on %U",
 586                        bucket,
 587                        format_dpo_type, dpo->dpoi_type);
 588
 589             mdd = mpls_disp_dpo_get(dpo->dpoi_index);
 590
 591             dpo = &mdd->mdd_dpo;
 592
 593             res = FIB_TEST_I(((DPO_ADJACENCY == dpo->dpoi_type) ||
 594                               (DPO_ADJACENCY_INCOMPLETE == dpo->dpoi_type)),
 595                             "bucket %d stacks on %U",
 596                              bucket,
 597                              format_dpo_type, dpo->dpoi_type);
 598             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 599                         "bucket %d stacks on adj %d",
 600                         bucket,
 601                         exp->adj.adj);
 602             break;
 603         }
 604         case FT_LB_INTF:
 605             res = FIB_TEST_I((DPO_INTERFACE_RX == dpo->dpoi_type),
 606                              "bucket %d stacks on %U",
 607                              bucket,
 608                              format_dpo_type, dpo->dpoi_type);
 609             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 610                         "bucket %d stacks on adj %d",
 611                         bucket,
 612                         exp->adj.adj);
 613             break;
 614         case FT_LB_L2:
 615             res = FIB_TEST_I((DPO_DVR == dpo->dpoi_type),
 616                              "bucket %d stacks on %U",
 617                              bucket,
 618                              format_dpo_type, dpo->dpoi_type);
 619             FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
 620                         "bucket %d stacks on adj %d",
 621                         bucket,
 622                         exp->adj.adj);
 623             break;
 624         case FT_LB_O_LB:
 625             res = FIB_TEST_I((DPO_LOAD_BALANCE == dpo->dpoi_type),
 626                              "bucket %d stacks on %U",
 627                              bucket,
 628                              format_dpo_type, dpo->dpoi_type);
 629             FIB_TEST_LB((exp->lb.lb == dpo->dpoi_index),
 630                         "bucket %d stacks on lb %d not %d",
 631                         bucket,
 632                         dpo->dpoi_index,
 633                         exp->lb.lb);
 634             break;
 635         case FT_LB_BIER_TABLE:
 636             FIB_TEST_LB((DPO_BIER_TABLE == dpo->dpoi_type),
 637                         "bucket %d stacks on %U",
 638                         bucket,
 639                         format_dpo_type, dpo->dpoi_type);
 640             FIB_TEST_LB((exp->bier.table == dpo->dpoi_index),
 641                         "bucket %d stacks on lb %d",
 642                         bucket,
 643                         exp->bier.table);
 644             break;
 645         case FT_LB_BIER_FMASK:
 646             FIB_TEST_LB((DPO_BIER_FMASK == dpo->dpoi_type),
 647                         "bucket %d stacks on %U",
 648                         bucket,
 649                         format_dpo_type, dpo->dpoi_type);
 650             FIB_TEST_LB((exp->bier.fmask == dpo->dpoi_index),
 651                         "bucket %d stacks on lb %d",
 652                         bucket,
 653                         exp->bier.fmask);
 654             break;
 655         case FT_LB_DROP:
 656             FIB_TEST_LB((DPO_DROP == dpo->dpoi_type),
 657                         "bucket %d stacks on %U",
 658                         bucket,
 659                         format_dpo_type, dpo->dpoi_type);
 660             break;
 661         case FT_LB_PUNT:
 662             FIB_TEST_LB((DPO_PUNT == dpo->dpoi_type),
 663                         "bucket %d stacks on %U",
 664                         bucket,
 665                         format_dpo_type, dpo->dpoi_type);
 666             break;
 667         }
 668     }
 669     return (res);
 670 }
 671
 672 int
 673 fib_test_validate_lb (const dpo_id_t *dpo,
 674                       int n_buckets,
 675                       ...)
 676 {
 677     const load_balance_t *lb;
 678     va_list ap;
 679     int res;
 680
 681     res = 0;
 682     va_start(ap, n_buckets);
 683
 684     if (!FIB_TEST_I((DPO_LOAD_BALANCE == dpo->dpoi_type),
 685                     "Entry links to %U",
 686                     format_dpo_type, dpo->dpoi_type))
 687     {
 688         lb = load_balance_get(dpo->dpoi_index);
 689
 690         res = fib_test_validate_lb_v(lb, n_buckets, &ap);
 691     }
 692     else
 693     {
 694         res = 1;
 695     }
 696
 697     va_end(ap);
 698
 699     return (res);
 700 }
 701
 702 int
 703 fib_test_validate_entry (fib_node_index_t fei,
 704                          fib_forward_chain_type_t fct,
 705                          int n_buckets,
 706                          ...)
 707 {
 708     dpo_id_t dpo = DPO_INVALID;
 709     const fib_prefix_t *pfx;
 710     index_t fw_lbi;
 711     u32 fib_index;
 712     va_list ap;
 713     int res;
 714
 715
 716     res = 0;
 717     pfx = fib_entry_get_prefix(fei);
 718     fib_index = fib_entry_get_fib_index(fei);
 719     fib_entry_contribute_forwarding(fei, fct, &dpo);
 720
 721     if (DPO_REPLICATE == dpo.dpoi_type)
 722     {
 723         const replicate_t *rep;
 724
 725         va_start(ap, n_buckets);
 726         rep = replicate_get(dpo.dpoi_index);
 727         res = fib_test_validate_rep_v(rep, n_buckets, &ap);
 728         va_end (ap);
 729     }
 730     else
 731     {
 732         const load_balance_t *lb;
 733
 734         FIB_TEST_LB((DPO_LOAD_BALANCE == dpo.dpoi_type),
 735                     "%U Entry links to %U",
 736                     format_fib_prefix, pfx,
 737                     format_dpo_type, dpo.dpoi_type);
 738
 739         va_start(ap, n_buckets);
 740         lb = load_balance_get(dpo.dpoi_index);
 741         res = fib_test_validate_lb_v(lb, n_buckets, &ap);
 742         va_end(ap);
 743
 744         /*
 745          * ensure that the LB contributed by the entry is the
 746          * same as the LB in the forwarding tables
 747          */
 748         if (fct == fib_entry_get_default_chain_type(fib_entry_get(fei)))
 749         {
 750             switch (pfx->fp_proto)
 751             {
 752             case FIB_PROTOCOL_IP4:
 753                 fw_lbi = ip4_fib_forwarding_lookup(fib_index, &pfx->fp_addr.ip4);
 754                 break;
 755             case FIB_PROTOCOL_IP6:
 756                 fw_lbi = ip6_fib_table_fwding_lookup(fib_index, &pfx->fp_addr.ip6);
 757                 break;
 758             case FIB_PROTOCOL_MPLS:
 759                 {
 760                     mpls_unicast_header_t hdr = {
 761                         .label_exp_s_ttl = 0,
 762                     };
 763
 764                     vnet_mpls_uc_set_label(&hdr.label_exp_s_ttl, pfx->fp_label);
 765                     vnet_mpls_uc_set_s(&hdr.label_exp_s_ttl, pfx->fp_eos);
 766                     hdr.label_exp_s_ttl = clib_host_to_net_u32(hdr.label_exp_s_ttl);
 767
 768                     fw_lbi = mpls_fib_table_forwarding_lookup(fib_index, &hdr);
 769                     break;
 770                 }
 771             default:
 772                 fw_lbi = 0;
 773             }
 774             FIB_TEST_LB((fw_lbi == dpo.dpoi_index),
 775                         "Contributed LB = FW LB:\n fwd:%U\n cont:%U",
 776                         format_load_balance, fw_lbi, 0,
 777                         format_load_balance, dpo.dpoi_index, 0);
 778         }
 779     }
 780
 781     dpo_reset(&dpo);
 782
 783     return (res);
 784 }
 785
 786 static int
 787 fib_test_v4 (void)
 788 {
 789     /*
 790      * In the default table check for the presence and correct forwarding
 791      * of the special entries
 792      */
 793     fib_node_index_t dfrt, fei, ai, ai2, locked_ai, ai_01, ai_02, ai_03;
 794     const dpo_id_t *dpo, *dpo1, *dpo2, *dpo_drop;
 795     const ip_adjacency_t *adj;
 796     const load_balance_t *lb;
 797     test_main_t *tm;
 798     u32 fib_index;
 799     int lb_count;
 800     int ii, res;
 801
 802     res = 0;
 803     /* via 10.10.10.1 */
 804     ip46_address_t nh_10_10_10_1 = {
 805         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
 806     };
 807     /* via 10.10.10.2 */
 808     ip46_address_t nh_10_10_10_2 = {
 809         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
 810     };
 811
 812     FIB_TEST((0 == pool_elts(load_balance_map_pool)), "LB-map pool size is %d",
 813              pool_elts(load_balance_map_pool));
 814
 815     tm = &test_main;
 816
 817     /* record the nubmer of load-balances in use before we start */
 818     lb_count = pool_elts(load_balance_pool);
 819
 820     /* Find or create FIB table 11 */
 821     fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, 11,
 822                                                   FIB_SOURCE_API);
 823
 824     for (ii = 0; ii < 4; ii++)
 825     {
 826         ip4_main.fib_index_by_sw_if_index[tm->hw[ii]->sw_if_index] = fib_index;
 827     }
 828
 829     fib_prefix_t pfx_0_0_0_0_s_0 = {
 830         .fp_len = 0,
 831         .fp_proto = FIB_PROTOCOL_IP4,
 832         .fp_addr = {
 833             .ip4 = {
 834                 {0}
 835             },
 836         },
 837     };
 838
 839     fib_prefix_t pfx = {
 840         .fp_len = 0,
 841         .fp_proto = FIB_PROTOCOL_IP4,
 842         .fp_addr = {
 843             .ip4 = {
 844                 {0}
 845             },
 846         },
 847     };
 848
 849     dpo_drop = drop_dpo_get(DPO_PROTO_IP4);
 850
 851     dfrt = fib_table_lookup(fib_index, &pfx_0_0_0_0_s_0);
 852     FIB_TEST((FIB_NODE_INDEX_INVALID != dfrt), "default route present");
 853     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(dfrt)),
 854              "Default route is DROP");
 855
 856     pfx.fp_len = 32;
 857     fei = fib_table_lookup(fib_index, &pfx);
 858     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "all zeros route present");
 859     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
 860              "all 0s route is DROP");
 861
 862     pfx.fp_addr.ip4.as_u32 = clib_host_to_net_u32(0xffffffff);
 863     pfx.fp_len = 32;
 864     fei = fib_table_lookup(fib_index, &pfx);
 865     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "all ones route present");
 866     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
 867              "all 1s route is DROP");
 868
 869     pfx.fp_addr.ip4.as_u32 = clib_host_to_net_u32(0xe0000000);
 870     pfx.fp_len = 8;
 871     fei = fib_table_lookup(fib_index, &pfx);
 872     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "all-mcast route present");
 873     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
 874              "all-mcast route is DROP");
 875
 876     pfx.fp_addr.ip4.as_u32 = clib_host_to_net_u32(0xf0000000);
 877     pfx.fp_len = 8;
 878     fei = fib_table_lookup(fib_index, &pfx);
 879     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "class-e route present");
 880     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
 881              "class-e route is DROP");
 882
 883     /*
 884      * at this stage there are 5 entries in the test FIB (plus 5 in the default),
 885      * all of which are special sourced and so none of which share path-lists.
 886      * There are also 2 entries, and 2 non-shared path-lists, in the v6 default
 887      * table, and 4 path-lists in the v6 MFIB table and 2 in v4.
 888      */
 889 #define ENBR (5+5+2)
 890
 891     u32 PNBR = 5+5+2+4+2;
 892
 893     /*
 894      * if the IGMP plugin is loaded this adds two more entries to the v4 MFIB
 895      */
 896     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
 897     FIB_TEST((PNBR == fib_path_list_pool_size()), "path list pool size is %d",
 898              fib_path_list_pool_size());
 899     FIB_TEST((ENBR == fib_entry_pool_size()), "entry pool size is %d",
 900              fib_entry_pool_size());
 901
 902     /*
 903      * add interface routes.
 904      *  validate presence of /24 attached and /32 recieve.
 905      *  test for the presence of the receive address in the glean and local adj
 906      */
 907     fib_prefix_t local_pfx = {
 908         .fp_len = 24,
 909         .fp_proto = FIB_PROTOCOL_IP4,
 910         .fp_addr = {
 911             .ip4 = {
 912                 .as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
 913             },
 914         },
 915     };
 916
 917     fib_table_entry_update_one_path(fib_index, &local_pfx,
 918                                     FIB_SOURCE_INTERFACE,
 919                                     (FIB_ENTRY_FLAG_CONNECTED |
 920                                      FIB_ENTRY_FLAG_ATTACHED),
 921                                     DPO_PROTO_IP4,
 922                                     NULL,
 923                                     tm->hw[0]->sw_if_index,
 924                                     ~0, // invalid fib index
 925                                     1, // weight
 926                                     NULL,
 927                                     FIB_ROUTE_PATH_FLAG_NONE);
 928     fei = fib_table_lookup(fib_index, &local_pfx);
 929     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached interface route present");
 930     FIB_TEST(((FIB_ENTRY_FLAG_ATTACHED | FIB_ENTRY_FLAG_CONNECTED) ==
 931               fib_entry_get_flags(fei)),
 932              "Flags set on attached interface");
 933
 934     ai = fib_entry_get_adj(fei);
 935     FIB_TEST((FIB_NODE_INDEX_INVALID != ai),
 936              "attached interface route adj present %d", ai);
 937     adj = adj_get(ai);
 938     FIB_TEST((IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index),
 939              "attached interface adj is glean");
 940
 941     local_pfx.fp_len = 32;
 942     fib_table_entry_update_one_path(fib_index, &local_pfx,
 943                                     FIB_SOURCE_INTERFACE,
 944                                     (FIB_ENTRY_FLAG_CONNECTED |
 945                                      FIB_ENTRY_FLAG_LOCAL),
 946                                     DPO_PROTO_IP4,
 947                                     NULL,
 948                                     tm->hw[0]->sw_if_index,
 949                                     ~0, // invalid fib index
 950                                     1, // weight
 951                                     NULL,
 952                                     FIB_ROUTE_PATH_FLAG_NONE);
 953     fei = fib_table_lookup(fib_index, &local_pfx);
 954     FIB_TEST(((FIB_ENTRY_FLAG_LOCAL | FIB_ENTRY_FLAG_CONNECTED) ==
 955               fib_entry_get_flags(fei)),
 956              "Flags set on local interface");
 957
 958     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local interface route present");
 959
 960     dpo = fib_entry_contribute_ip_forwarding(fei);
 961     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 0),
 962              "RPF list for local length 0");
 963     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
 964     FIB_TEST((DPO_RECEIVE == dpo->dpoi_type),
 965              "local interface adj is local");
 966     receive_dpo_t *rd = receive_dpo_get(dpo->dpoi_index);
 967
 968     FIB_TEST((0 == ip46_address_cmp(&local_pfx.fp_addr,
 969                                     &rd->rd_addr)),
 970              "local interface adj is receive ok");
 971
 972     FIB_TEST((2 == fib_table_get_num_entries(fib_index,
 973                                              FIB_PROTOCOL_IP4,
 974                                              FIB_SOURCE_INTERFACE)),
 975              "2 Interface Source'd prefixes");
 976     FIB_TEST((0 == ip46_address_cmp(&local_pfx.fp_addr,
 977                                     &adj->sub_type.glean.rx_pfx.fp_addr)),
 978              "attached interface adj is receive ok");
 979
 980     /*
 981      * +2 interface routes +2 non-shared path-lists
 982      */
 983     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
 984     FIB_TEST((PNBR+2 == fib_path_list_pool_size()), "path list pool size is%d",
 985              fib_path_list_pool_size());
 986     FIB_TEST((ENBR+2 == fib_entry_pool_size()), "entry pool size is %d",
 987              fib_entry_pool_size());
 988
 989     /*
 990      * Modify the default route to be via an adj not yet known.
 991      * this sources the defalut route with the API source, which is
 992      * a higher preference to the DEFAULT_ROUTE source
 993      */
 994     pfx.fp_addr.ip4.as_u32 = 0;
 995     pfx.fp_len = 0;
 996     fib_table_entry_path_add(fib_index, &pfx,
 997                              FIB_SOURCE_API,
 998                              FIB_ENTRY_FLAG_NONE,
 999                              DPO_PROTO_IP4,
1000                              &nh_10_10_10_1,
1001                              tm->hw[0]->sw_if_index,
1002                              ~0, // invalid fib index
1003                              1,
1004                              NULL,
1005                              FIB_ROUTE_PATH_FLAG_NONE);
1006     fei = fib_table_lookup(fib_index, &pfx);
1007     FIB_TEST((FIB_ENTRY_FLAG_NONE == fib_entry_get_flags(fei)),
1008              "Flags set on API route");
1009
1010     FIB_TEST((fei == dfrt), "default route same index");
1011     ai = fib_entry_get_adj(fei);
1012     FIB_TEST((FIB_NODE_INDEX_INVALID != ai), "default route adj present");
1013     adj = adj_get(ai);
1014     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
1015              "adj is incomplete");
1016     FIB_TEST((0 == ip46_address_cmp(&nh_10_10_10_1, &adj->sub_type.nbr.next_hop)),
1017              "adj nbr next-hop ok");
1018     FIB_TEST((1 == fib_table_get_num_entries(fib_index,
1019                                              FIB_PROTOCOL_IP4,
1020                                              FIB_SOURCE_API)),
1021              "1 API Source'd prefixes");
1022
1023     /*
1024      * find the adj in the shared db
1025      */
1026     locked_ai = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
1027                                     VNET_LINK_IP4,
1028                                     &nh_10_10_10_1,
1029                                     tm->hw[0]->sw_if_index);
1030     FIB_TEST((locked_ai == ai), "ADJ NBR DB find");
1031     adj_unlock(locked_ai);
1032
1033     /*
1034      * +1 shared path-list
1035      */
1036     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
1037              fib_path_list_db_size());
1038     FIB_TEST((PNBR+3 == fib_path_list_pool_size()), "path list pool size is%d",
1039              fib_path_list_pool_size());
1040     FIB_TEST((ENBR+2 == fib_entry_pool_size()), "entry pool size is %d",
1041              fib_entry_pool_size());
1042
1043     /*
1044      * remove the API source from the default route. We expected
1045      * the route to remain, sourced by DEFAULT_ROUTE, and hence a DROP
1046      */
1047     pfx.fp_addr.ip4.as_u32 = 0;
1048     pfx.fp_len = 0;
1049     fib_table_entry_path_remove(fib_index, &pfx,
1050                                 FIB_SOURCE_API,
1051                                 DPO_PROTO_IP4,
1052                                 &nh_10_10_10_1,
1053                                 tm->hw[0]->sw_if_index,
1054                                 ~0, // non-recursive path, so no FIB index
1055                                 1,
1056                                 FIB_ROUTE_PATH_FLAG_NONE);
1057
1058     fei = fib_table_lookup(fib_index, &pfx);
1059
1060     FIB_TEST((fei == dfrt), "default route same index");
1061     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
1062              "Default route is DROP");
1063
1064     /*
1065      * -1 shared-path-list
1066      */
1067     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
1068     FIB_TEST((PNBR+2 == fib_path_list_pool_size()), "path list pool size is%d",
1069              fib_path_list_pool_size());
1070     FIB_TEST((ENBR+2 == fib_entry_pool_size()), "entry pool size is %d",
1071              fib_entry_pool_size());
1072
1073     /*
1074      * Add an 2 ARP entry => a complete ADJ plus adj-fib.
1075      */
1076     fib_prefix_t pfx_10_10_10_1_s_32 = {
1077         .fp_len = 32,
1078         .fp_proto = FIB_PROTOCOL_IP4,
1079         .fp_addr = {
1080             /* 10.10.10.1 */
1081             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
1082         },
1083     };
1084     fib_prefix_t pfx_10_10_10_2_s_32 = {
1085         .fp_len = 32,
1086         .fp_proto = FIB_PROTOCOL_IP4,
1087         .fp_addr = {
1088             /* 10.10.10.2 */
1089             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
1090         },
1091     };
1092     fib_prefix_t pfx_11_11_11_11_s_32 = {
1093         .fp_len = 32,
1094         .fp_proto = FIB_PROTOCOL_IP4,
1095         .fp_addr = {
1096             /* 11.11.11.11 */
1097             .ip4.as_u32 = clib_host_to_net_u32(0x0b0b0b0b),
1098         },
1099     };
1100     u8 eth_addr[] = {
1101         0xde, 0xde, 0xde, 0xba, 0xba, 0xba,
1102     };
1103
1104     ip46_address_t nh_12_12_12_12 = {
1105         .ip4.as_u32 = clib_host_to_net_u32(0x0c0c0c0c),
1106     };
1107     adj_index_t ai_12_12_12_12;
1108
1109     /*
1110      * Add a route via an incomplete ADJ. then complete the ADJ
1111      * Expect the route LB is updated to use complete adj type.
1112      */
1113     fei = fib_table_entry_update_one_path(fib_index,
1114                                           &pfx_11_11_11_11_s_32,
1115                                           FIB_SOURCE_API,
1116                                           FIB_ENTRY_FLAG_ATTACHED,
1117                                           DPO_PROTO_IP4,
1118                                           &pfx_10_10_10_1_s_32.fp_addr,
1119                                           tm->hw[0]->sw_if_index,
1120                                           ~0, // invalid fib index
1121                                           1,
1122                                           NULL,
1123                                           FIB_ROUTE_PATH_FLAG_NONE);
1124
1125     dpo = fib_entry_contribute_ip_forwarding(fei);
1126     dpo1 = load_balance_get_bucket(dpo->dpoi_index, 0);
1127     FIB_TEST(DPO_ADJACENCY_INCOMPLETE == dpo1->dpoi_type,
1128              "11.11.11.11/32 via incomplete adj");
1129
1130     ai_01 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
1131                                 VNET_LINK_IP4,
1132                                 &pfx_10_10_10_1_s_32.fp_addr,
1133                                 tm->hw[0]->sw_if_index);
1134     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_01), "adj created");
1135     adj = adj_get(ai_01);
1136     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
1137              "adj is incomplete");
1138     FIB_TEST((0 == ip46_address_cmp(&pfx_10_10_10_1_s_32.fp_addr,
1139                                     &adj->sub_type.nbr.next_hop)),
1140              "adj nbr next-hop ok");
1141
1142     adj_nbr_update_rewrite(ai_01, ADJ_NBR_REWRITE_FLAG_COMPLETE,
1143                            fib_test_build_rewrite(eth_addr));
1144     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
1145              "adj is complete");
1146     FIB_TEST((0 == ip46_address_cmp(&pfx_10_10_10_1_s_32.fp_addr,
1147                                     &adj->sub_type.nbr.next_hop)),
1148              "adj nbr next-hop ok");
1149     ai = fib_entry_get_adj(fei);
1150     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj");
1151
1152     dpo = fib_entry_contribute_ip_forwarding(fei);
1153     dpo1 = load_balance_get_bucket(dpo->dpoi_index, 0);
1154     FIB_TEST(DPO_ADJACENCY == dpo1->dpoi_type,
1155              "11.11.11.11/32 via complete adj");
1156     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1,
1157                                     tm->hw[0]->sw_if_index),
1158              "RPF list for adj-fib contains adj");
1159
1160     ai_12_12_12_12 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
1161                                          VNET_LINK_IP4,
1162                                          &nh_12_12_12_12,
1163                                          tm->hw[1]->sw_if_index);
1164     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_12_12_12_12), "adj created");
1165     adj = adj_get(ai_12_12_12_12);
1166     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
1167              "adj is incomplete");
1168     FIB_TEST((0 == ip46_address_cmp(&nh_12_12_12_12,
1169                                     &adj->sub_type.nbr.next_hop)),
1170              "adj nbr next-hop ok");
1171     adj_nbr_update_rewrite(ai_12_12_12_12, ADJ_NBR_REWRITE_FLAG_COMPLETE,
1172                            fib_test_build_rewrite(eth_addr));
1173     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
1174              "adj is complete");
1175
1176     /*
1177      * add the adj fib
1178      */
1179     fei = fib_table_entry_path_add(fib_index,
1180                                    &pfx_10_10_10_1_s_32,
1181                                    FIB_SOURCE_ADJ,
1182                                    FIB_ENTRY_FLAG_ATTACHED,
1183                                    DPO_PROTO_IP4,
1184                                    &pfx_10_10_10_1_s_32.fp_addr,
1185                                    tm->hw[0]->sw_if_index,
1186                                    ~0, // invalid fib index
1187                                    1,
1188                                    NULL,
1189                                    FIB_ROUTE_PATH_FLAG_NONE);
1190     FIB_TEST((FIB_ENTRY_FLAG_ATTACHED  == fib_entry_get_flags(fei)),
1191              "Flags set on adj-fib");
1192     ai = fib_entry_get_adj(fei);
1193     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj, %d", ai);
1194
1195     fib_table_entry_path_remove(fib_index,
1196                                 &pfx_11_11_11_11_s_32,
1197                                 FIB_SOURCE_API,
1198                                 DPO_PROTO_IP4,
1199                                 &pfx_10_10_10_1_s_32.fp_addr,
1200                                 tm->hw[0]->sw_if_index,
1201                                 ~0, // invalid fib index
1202                                 1,
1203                                 FIB_ROUTE_PATH_FLAG_NONE);
1204
1205     eth_addr[5] = 0xb2;
1206
1207     ai_02 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
1208                                 VNET_LINK_IP4,
1209                                 &pfx_10_10_10_2_s_32.fp_addr,
1210                                 tm->hw[0]->sw_if_index);
1211     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_02), "adj created");
1212     adj = adj_get(ai_02);
1213     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
1214              "adj is incomplete");
1215     FIB_TEST((0 == ip46_address_cmp(&pfx_10_10_10_2_s_32.fp_addr,
1216                                     &adj->sub_type.nbr.next_hop)),
1217              "adj nbr next-hop ok");
1218
1219     adj_nbr_update_rewrite(ai_02, ADJ_NBR_REWRITE_FLAG_COMPLETE,
1220                            fib_test_build_rewrite(eth_addr));
1221     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
1222              "adj is complete");
1223     FIB_TEST((0 == ip46_address_cmp(&pfx_10_10_10_2_s_32.fp_addr,
1224                                     &adj->sub_type.nbr.next_hop)),
1225              "adj nbr next-hop ok");
1226     FIB_TEST((ai_01 != ai_02), "ADJs are different");
1227
1228     fib_table_entry_path_add(fib_index,
1229                              &pfx_10_10_10_2_s_32,
1230                              FIB_SOURCE_ADJ,
1231                              FIB_ENTRY_FLAG_ATTACHED,
1232                              DPO_PROTO_IP4,
1233                              &pfx_10_10_10_2_s_32.fp_addr,
1234                              tm->hw[0]->sw_if_index,
1235                              ~0, // invalid fib index
1236                              1,
1237                              NULL,
1238                              FIB_ROUTE_PATH_FLAG_NONE);
1239
1240     fei = fib_table_lookup(fib_index, &pfx_10_10_10_2_s_32);
1241     ai = fib_entry_get_adj(fei);
1242     FIB_TEST((ai_02 == ai), "ADJ-FIB resolves via adj");
1243
1244     /*
1245      * +2 adj-fibs, and their non-shared path-lists
1246      */
1247     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
1248     FIB_TEST((PNBR+4 == fib_path_list_pool_size()), "path list pool size is %d",
1249              fib_path_list_pool_size());
1250     FIB_TEST((ENBR+4 == fib_entry_pool_size()), "entry pool size is %d",
1251              fib_entry_pool_size());
1252
1253     /*
1254      * Add 2 routes via the first ADJ. ensure path-list sharing
1255      */
1256     fib_prefix_t pfx_1_1_1_1_s_32 = {
1257         .fp_len = 32,
1258         .fp_proto = FIB_PROTOCOL_IP4,
1259         .fp_addr = {
1260             /* 1.1.1.1/32 */
1261             .ip4.as_u32 = clib_host_to_net_u32(0x01010101),
1262         },
1263     };
1264
1265     fib_table_entry_path_add(fib_index,
1266                              &pfx_1_1_1_1_s_32,
1267                              FIB_SOURCE_API,
1268                              FIB_ENTRY_FLAG_NONE,
1269                              DPO_PROTO_IP4,
1270                              &nh_10_10_10_1,
1271                              tm->hw[0]->sw_if_index,
1272                              ~0, // invalid fib index
1273                              1,
1274                              NULL,
1275                              FIB_ROUTE_PATH_FLAG_NONE);
1276     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
1277     ai = fib_entry_get_adj(fei);
1278     FIB_TEST((ai_01 == ai), "1.1.1.1 resolves via 10.10.10.1");
1279
1280     /*
1281      * +1 entry and a shared path-list
1282      */
1283     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB is empty");
1284     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
1285              fib_path_list_pool_size());
1286     FIB_TEST((ENBR+5 == fib_entry_pool_size()), "entry pool size is %d",
1287              fib_entry_pool_size());
1288
1289     /* 1.1.2.0/24 */
1290     fib_prefix_t pfx_1_1_2_0_s_24 = {
1291         .fp_len = 24,
1292         .fp_proto = FIB_PROTOCOL_IP4,
1293         .fp_addr = {
1294             .ip4.as_u32 = clib_host_to_net_u32(0x01010200),
1295         }
1296     };
1297
1298     fib_table_entry_path_add(fib_index,
1299                              &pfx_1_1_2_0_s_24,
1300                              FIB_SOURCE_API,
1301                              FIB_ENTRY_FLAG_NONE,
1302                              DPO_PROTO_IP4,
1303                              &nh_10_10_10_1,
1304                              tm->hw[0]->sw_if_index,
1305                              ~0, // invalid fib index
1306                              1,
1307                              NULL,
1308                              FIB_ROUTE_PATH_FLAG_NONE);
1309     fei = fib_table_lookup(fib_index, &pfx_1_1_2_0_s_24);
1310     ai = fib_entry_get_adj(fei);
1311     FIB_TEST((ai_01 == ai), "1.1.2.0/24 resolves via 10.10.10.1");
1312
1313     /*
1314      * +1 entry only
1315      */
1316     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB is empty");
1317     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
1318              fib_path_list_pool_size());
1319     FIB_TEST((ENBR+6 == fib_entry_pool_size()), "entry pool size is %d",
1320              fib_entry_pool_size());
1321
1322     /*
1323      * modify 1.1.2.0/24 to use multipath.
1324      */
1325     fib_table_entry_path_add(fib_index,
1326                              &pfx_1_1_2_0_s_24,
1327                              FIB_SOURCE_API,
1328                              FIB_ENTRY_FLAG_NONE,
1329                              DPO_PROTO_IP4,
1330                              &nh_10_10_10_2,
1331                              tm->hw[0]->sw_if_index,
1332                              ~0, // invalid fib index
1333                              1,
1334                              NULL,
1335                              FIB_ROUTE_PATH_FLAG_NONE);
1336     fei = fib_table_lookup(fib_index, &pfx_1_1_2_0_s_24);
1337     dpo = fib_entry_contribute_ip_forwarding(fei);
1338     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1339                                     1, tm->hw[0]->sw_if_index),
1340              "RPF list for 1.1.2.0/24 contains both adjs");
1341
1342     dpo1 = load_balance_get_bucket(dpo->dpoi_index, 0);
1343     FIB_TEST(DPO_ADJACENCY == dpo1->dpoi_type, "type is %d", dpo1->dpoi_type);
1344     FIB_TEST((ai_01 == dpo1->dpoi_index),
1345              "1.1.2.0/24 bucket 0 resolves via 10.10.10.1 (%d=%d)",
1346              ai_01, dpo1->dpoi_index);
1347
1348     dpo1 = load_balance_get_bucket(dpo->dpoi_index, 1);
1349     FIB_TEST(DPO_ADJACENCY == dpo1->dpoi_type, "type is %d", dpo1->dpoi_type);
1350     FIB_TEST((ai_02 == dpo1->dpoi_index),
1351              "1.1.2.0/24 bucket 1 resolves via 10.10.10.2");
1352
1353     /*
1354      * +1 shared-pathlist
1355      */
1356     FIB_TEST((2 == fib_path_list_db_size()),   "path list DB is empty");
1357     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
1358              fib_path_list_pool_size());
1359     FIB_TEST((ENBR+6 == fib_entry_pool_size()), "entry pool size is %d",
1360              fib_entry_pool_size());
1361
1362     /*
1363      * revert the modify
1364      */
1365     fib_table_entry_path_remove(fib_index,
1366                                 &pfx_1_1_2_0_s_24,
1367                                 FIB_SOURCE_API,
1368                                 DPO_PROTO_IP4,
1369                                 &nh_10_10_10_2,
1370                                 tm->hw[0]->sw_if_index,
1371                                 ~0,
1372                                 1,
1373                                 FIB_ROUTE_PATH_FLAG_NONE);
1374     fei = fib_table_lookup(fib_index, &pfx_1_1_2_0_s_24);
1375     dpo = fib_entry_contribute_ip_forwarding(fei);
1376     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1377                                     1, tm->hw[0]->sw_if_index),
1378              "RPF list for 1.1.2.0/24 contains one adj");
1379
1380     ai = fib_entry_get_adj(fei);
1381     FIB_TEST((ai_01 == ai), "1.1.2.0/24 resolves via 10.10.10.1");
1382
1383     /*
1384      * +1 shared-pathlist
1385      */
1386     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB is %d",
1387              fib_path_list_db_size());
1388     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
1389              fib_path_list_pool_size());
1390     FIB_TEST((ENBR+6 == fib_entry_pool_size()), "entry pool size is %d",
1391              fib_entry_pool_size());
1392
1393     /*
1394      * Add 2 recursive routes:
1395      *   100.100.100.100/32 via 1.1.1.1/32  => the via entry is installed.
1396      *   100.100.100.101/32 via 1.1.1.1/32  => the via entry is installed.
1397      */
1398     fib_prefix_t bgp_100_pfx = {
1399         .fp_len = 32,
1400         .fp_proto = FIB_PROTOCOL_IP4,
1401         .fp_addr = {
1402             /* 100.100.100.100/32 */
1403             .ip4.as_u32 = clib_host_to_net_u32(0x64646464),
1404         },
1405     };
1406     /* via 1.1.1.1 */
1407     ip46_address_t nh_1_1_1_1 = {
1408         .ip4.as_u32 = clib_host_to_net_u32(0x01010101),
1409     };
1410
1411     fei = fib_table_entry_path_add(fib_index,
1412                                    &bgp_100_pfx,
1413                                    FIB_SOURCE_API,
1414                                    FIB_ENTRY_FLAG_NONE,
1415                                    DPO_PROTO_IP4,
1416                                    &nh_1_1_1_1,
1417                                    ~0, // no index provided.
1418                                    fib_index, // nexthop in same fib as route
1419                                    1,
1420                                    NULL,
1421                                    FIB_ROUTE_PATH_FLAG_NONE);
1422
1423     FIB_TEST_REC_FORW(&bgp_100_pfx, &pfx_1_1_1_1_s_32, 0);
1424     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1,
1425                                     tm->hw[0]->sw_if_index),
1426              "RPF list for adj-fib contains adj");
1427
1428     /*
1429      * +1 entry and +1 shared-path-list
1430      */
1431     FIB_TEST((2  == fib_path_list_db_size()),   "path list DB population:%d",
1432              fib_path_list_db_size());
1433     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
1434              fib_path_list_pool_size());
1435     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
1436              fib_entry_pool_size());
1437
1438     fib_prefix_t bgp_101_pfx = {
1439         .fp_len = 32,
1440         .fp_proto = FIB_PROTOCOL_IP4,
1441         .fp_addr = {
1442             /* 100.100.100.101/32 */
1443             .ip4.as_u32 = clib_host_to_net_u32(0x64646465),
1444         },
1445     };
1446
1447     fib_table_entry_path_add(fib_index,
1448                              &bgp_101_pfx,
1449                              FIB_SOURCE_API,
1450                              FIB_ENTRY_FLAG_NONE,
1451                              DPO_PROTO_IP4,
1452                              &nh_1_1_1_1,
1453                              ~0, // no index provided.
1454                              fib_index, // nexthop in same fib as route
1455                              1,
1456                              NULL,
1457                              FIB_ROUTE_PATH_FLAG_NONE);
1458
1459     FIB_TEST_REC_FORW(&bgp_101_pfx, &pfx_1_1_1_1_s_32, 0);
1460     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1,
1461                                     tm->hw[0]->sw_if_index),
1462              "RPF list for adj-fib contains adj");
1463
1464     /*
1465      * +1 entry, but the recursive path-list is shared.
1466      */
1467     FIB_TEST((2  == fib_path_list_db_size()),   "path list DB population:%d",
1468              fib_path_list_db_size());
1469     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
1470              fib_path_list_pool_size());
1471     FIB_TEST((ENBR+8 == fib_entry_pool_size()), "entry pool size is %d",
1472              fib_entry_pool_size());
1473
1474     /*
1475      * An special route; one where the user (me) provides the
1476      * adjacency through which the route will resovle by setting the flags
1477      */
1478     fib_prefix_t ex_pfx = {
1479         .fp_len = 32,
1480         .fp_proto = FIB_PROTOCOL_IP4,
1481         .fp_addr = {
1482             /* 4.4.4.4/32 */
1483             .ip4.as_u32 = clib_host_to_net_u32(0x04040404),
1484         },
1485     };
1486
1487     fib_table_entry_special_add(fib_index,
1488                                 &ex_pfx,
1489                                 FIB_SOURCE_SPECIAL,
1490                                 FIB_ENTRY_FLAG_LOCAL);
1491     fei = fib_table_lookup_exact_match(fib_index, &ex_pfx);
1492     dpo = fib_entry_contribute_ip_forwarding(fei);
1493     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
1494     FIB_TEST((DPO_RECEIVE == dpo->dpoi_type),
1495              "local interface adj is local");
1496
1497     fib_table_entry_special_remove(fib_index,
1498                                    &ex_pfx,
1499                                    FIB_SOURCE_SPECIAL);
1500     FIB_TEST(FIB_NODE_INDEX_INVALID ==
1501              fib_table_lookup_exact_match(fib_index, &ex_pfx),
1502              "Exclusive reoute removed");
1503
1504     /*
1505      * An EXCLUSIVE route; one where the user (me) provides the exclusive
1506      * adjacency through which the route will resovle
1507      */
1508     dpo_id_t ex_dpo = DPO_INVALID;
1509
1510     lookup_dpo_add_or_lock_w_fib_index(fib_index,
1511                                        DPO_PROTO_IP4,
1512                                        LOOKUP_UNICAST,
1513                                        LOOKUP_INPUT_DST_ADDR,
1514                                        LOOKUP_TABLE_FROM_CONFIG,
1515                                        &ex_dpo);
1516
1517     fib_table_entry_special_dpo_add(fib_index,
1518                                     &ex_pfx,
1519                                     FIB_SOURCE_SPECIAL,
1520                                     FIB_ENTRY_FLAG_EXCLUSIVE,
1521                                     &ex_dpo);
1522     fei = fib_table_lookup_exact_match(fib_index, &ex_pfx);
1523     dpo = fib_entry_contribute_ip_forwarding(fei);
1524     FIB_TEST(!dpo_cmp(&ex_dpo, load_balance_get_bucket(dpo->dpoi_index, 0)),
1525              "exclusive remote uses lookup DPO");
1526
1527     /*
1528      * update the exclusive to use a different DPO
1529      */
1530     ip_null_dpo_add_and_lock(DPO_PROTO_IP4,
1531                              IP_NULL_ACTION_SEND_ICMP_UNREACH,
1532                              &ex_dpo);
1533     fib_table_entry_special_dpo_update(fib_index,
1534                                        &ex_pfx,
1535                                        FIB_SOURCE_SPECIAL,
1536                                        FIB_ENTRY_FLAG_EXCLUSIVE,
1537                                        &ex_dpo);
1538     dpo = fib_entry_contribute_ip_forwarding(fei);
1539     FIB_TEST(!dpo_cmp(&ex_dpo, load_balance_get_bucket(dpo->dpoi_index, 0)),
1540              "exclusive remote uses now uses NULL DPO");
1541
1542     fib_table_entry_special_remove(fib_index,
1543                                    &ex_pfx,
1544                                    FIB_SOURCE_SPECIAL);
1545     FIB_TEST(FIB_NODE_INDEX_INVALID ==
1546              fib_table_lookup_exact_match(fib_index, &ex_pfx),
1547              "Exclusive reoute removed");
1548     dpo_reset(&ex_dpo);
1549
1550     /*
1551      * Add a recursive route:
1552      *   200.200.200.200/32 via 1.1.1.2/32  => the via entry is NOT installed.
1553      */
1554     fib_prefix_t bgp_200_pfx = {
1555         .fp_len = 32,
1556         .fp_proto = FIB_PROTOCOL_IP4,
1557         .fp_addr = {
1558             /* 200.200.200.200/32 */
1559             .ip4.as_u32 = clib_host_to_net_u32(0xc8c8c8c8),
1560         },
1561     };
1562     /* via 1.1.1.2 */
1563     fib_prefix_t pfx_1_1_1_2_s_32 = {
1564         .fp_len = 32,
1565         .fp_proto = FIB_PROTOCOL_IP4,
1566         .fp_addr = {
1567             .ip4.as_u32 = clib_host_to_net_u32(0x01010102),
1568         },
1569     };
1570
1571     fei = fib_table_entry_path_add(fib_index,
1572                                    &bgp_200_pfx,
1573                                    FIB_SOURCE_API,
1574                                    FIB_ENTRY_FLAG_NONE,
1575                                    DPO_PROTO_IP4,
1576                                    &pfx_1_1_1_2_s_32.fp_addr,
1577                                    ~0, // no index provided.
1578                                    fib_index, // nexthop in same fib as route
1579                                    1,
1580                                    NULL,
1581                                    FIB_ROUTE_PATH_FLAG_NONE);
1582
1583     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
1584              "Recursive via unresolved is drop");
1585
1586     /*
1587      * the adj should be recursive via drop, since the route resolves via
1588      * the default route, which is itself a DROP
1589      */
1590     fei = fib_table_lookup(fib_index, &pfx_1_1_1_2_s_32);
1591     dpo1 = fib_entry_contribute_ip_forwarding(fei);
1592     FIB_TEST(load_balance_is_drop(dpo1), "1.1.1.2/32 is drop");
1593     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 0),
1594              "RPF list for 1.1.1.2/32 contains 0 adjs");
1595
1596     /*
1597      * +2 entry and +1 shared-path-list
1598      */
1599     FIB_TEST((3  == fib_path_list_db_size()),   "path list DB population:%d",
1600              fib_path_list_db_size());
1601     FIB_TEST((PNBR+7 == fib_path_list_pool_size()), "path list pool size is %d",
1602              fib_path_list_pool_size());
1603     FIB_TEST((ENBR+10 == fib_entry_pool_size()), "entry pool size is %d",
1604              fib_entry_pool_size());
1605
1606     /*
1607      * Unequal Cost load-balance. 3:1 ratio. fits in a 4 bucket LB
1608      * The paths are sort by NH first. in this case the the path with greater
1609      * weight is first in the set. This ordering is to test the RPF sort|uniq logic
1610      */
1611     fib_prefix_t pfx_1_2_3_4_s_32 = {
1612         .fp_len = 32,
1613         .fp_proto = FIB_PROTOCOL_IP4,
1614         .fp_addr = {
1615             .ip4.as_u32 = clib_host_to_net_u32(0x01020304),
1616         },
1617     };
1618     fib_table_entry_path_add(fib_index,
1619                              &pfx_1_2_3_4_s_32,
1620                              FIB_SOURCE_API,
1621                              FIB_ENTRY_FLAG_NONE,
1622                              DPO_PROTO_IP4,
1623                              &nh_10_10_10_1,
1624                              tm->hw[0]->sw_if_index,
1625                              ~0,
1626                              1,
1627                              NULL,
1628                              FIB_ROUTE_PATH_FLAG_NONE);
1629     fei = fib_table_entry_path_add(fib_index,
1630                                    &pfx_1_2_3_4_s_32,
1631                                    FIB_SOURCE_API,
1632                                    FIB_ENTRY_FLAG_NONE,
1633                                    DPO_PROTO_IP4,
1634                                    &nh_12_12_12_12,
1635                                    tm->hw[1]->sw_if_index,
1636                                    ~0,
1637                                    3,
1638                                    NULL,
1639                                    FIB_ROUTE_PATH_FLAG_NONE);
1640
1641     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "1.2.3.4/32 presnet");
1642     dpo = fib_entry_contribute_ip_forwarding(fei);
1643     lb = load_balance_get(dpo->dpoi_index);
1644     FIB_TEST((lb->lb_n_buckets == 4),
1645              "1.2.3.4/32 LB has %d bucket",
1646              lb->lb_n_buckets);
1647
1648     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_4_s_32, 0, ai_12_12_12_12);
1649     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_4_s_32, 1, ai_12_12_12_12);
1650     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_4_s_32, 2, ai_12_12_12_12);
1651     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_4_s_32, 3, ai_01);
1652
1653     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 2,
1654                                     tm->hw[0]->sw_if_index,
1655                                     tm->hw[1]->sw_if_index),
1656              "RPF list for 1.2.3.4/32 contains both adjs");
1657
1658
1659     /*
1660      * Unequal Cost load-balance. 4:1 ratio.
1661      *  fits in a 16 bucket LB with ratio 13:3
1662      */
1663     fib_prefix_t pfx_1_2_3_5_s_32 = {
1664         .fp_len = 32,
1665         .fp_proto = FIB_PROTOCOL_IP4,
1666         .fp_addr = {
1667             .ip4.as_u32 = clib_host_to_net_u32(0x01020305),
1668         },
1669     };
1670     fib_table_entry_path_add(fib_index,
1671                              &pfx_1_2_3_5_s_32,
1672                              FIB_SOURCE_API,
1673                              FIB_ENTRY_FLAG_NONE,
1674                              DPO_PROTO_IP4,
1675                              &nh_12_12_12_12,
1676                              tm->hw[1]->sw_if_index,
1677                              ~0,
1678                              1,
1679                              NULL,
1680                              FIB_ROUTE_PATH_FLAG_NONE);
1681     fei = fib_table_entry_path_add(fib_index,
1682                                    &pfx_1_2_3_5_s_32,
1683                                    FIB_SOURCE_API,
1684                                    FIB_ENTRY_FLAG_NONE,
1685                                    DPO_PROTO_IP4,
1686                                    &nh_10_10_10_1,
1687                                    tm->hw[0]->sw_if_index,
1688                                    ~0,
1689                                    4,
1690                                    NULL,
1691                                    FIB_ROUTE_PATH_FLAG_NONE);
1692
1693     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "1.2.3.5/32 presnet");
1694     dpo = fib_entry_contribute_ip_forwarding(fei);
1695     lb = load_balance_get(dpo->dpoi_index);
1696     FIB_TEST((lb->lb_n_buckets == 16),
1697              "1.2.3.5/32 LB has %d bucket",
1698              lb->lb_n_buckets);
1699
1700     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 0, ai_01);
1701     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 1, ai_01);
1702     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 2, ai_01);
1703     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 3, ai_01);
1704     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 4, ai_01);
1705     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 5, ai_01);
1706     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 6, ai_01);
1707     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 7, ai_01);
1708     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 8, ai_01);
1709     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 9, ai_01);
1710     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 10, ai_01);
1711     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 11, ai_01);
1712     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 12, ai_01);
1713     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 13, ai_12_12_12_12);
1714     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 14, ai_12_12_12_12);
1715     FIB_TEST_LB_BUCKET_VIA_ADJ(&pfx_1_2_3_5_s_32, 15, ai_12_12_12_12);
1716
1717     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 2,
1718                                     tm->hw[0]->sw_if_index,
1719                                     tm->hw[1]->sw_if_index),
1720              "RPF list for 1.2.3.4/32 contains both adjs");
1721
1722     /*
1723      * Test UCMP with a large weight skew - this produces load-balance objects with large
1724      * numbers of buckets to accommodate the skew. By updating said load-balances we are
1725      * laso testing the LB in placce modify code when number of buckets is large.
1726      */
1727     fib_prefix_t pfx_6_6_6_6_s_32 = {
1728         .fp_len = 32,
1729         .fp_proto = FIB_PROTOCOL_IP4,
1730         .fp_addr = {
1731             /* 1.1.1.1/32 */
1732             .ip4.as_u32 = clib_host_to_net_u32(0x06060606),
1733         },
1734     };
1735     fib_test_lb_bucket_t ip_o_10_10_10_1 = {
1736         .type = FT_LB_ADJ,
1737         .adj = {
1738             .adj = ai_01,
1739         },
1740     };
1741     fib_test_lb_bucket_t ip_o_10_10_10_2 = {
1742         .type = FT_LB_ADJ,
1743         .adj = {
1744             .adj = ai_02,
1745         },
1746     };
1747     fib_test_lb_bucket_t ip_6_6_6_6_o_12_12_12_12 = {
1748         .type = FT_LB_ADJ,
1749         .adj = {
1750             .adj = ai_12_12_12_12,
1751         },
1752     };
1753     fib_table_entry_update_one_path(fib_index,
1754                                     &pfx_6_6_6_6_s_32,
1755                                     FIB_SOURCE_API,
1756                                     FIB_ENTRY_FLAG_NONE,
1757                                     DPO_PROTO_IP4,
1758                                     &nh_10_10_10_1,
1759                                     tm->hw[0]->sw_if_index,
1760                                     ~0, // invalid fib index
1761                                     0,  // zero weigth
1762                                     NULL,
1763                                     FIB_ROUTE_PATH_FLAG_NONE);
1764
1765     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
1766     FIB_TEST(!fib_test_validate_entry(fei,
1767                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1768                                       1,
1769                                       &ip_o_10_10_10_1),
1770              "6.6.6.6/32 via 10.10.10.1");
1771
1772     fib_table_entry_path_add(fib_index,
1773                              &pfx_6_6_6_6_s_32,
1774                              FIB_SOURCE_API,
1775                              FIB_ENTRY_FLAG_NONE,
1776                              DPO_PROTO_IP4,
1777                              &nh_10_10_10_2,
1778                              tm->hw[0]->sw_if_index,
1779                              ~0, // invalid fib index
1780                              100,
1781                              NULL,
1782                              FIB_ROUTE_PATH_FLAG_NONE);
1783
1784     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
1785     FIB_TEST(!fib_test_validate_entry(fei,
1786                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1787                                       64,
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_2,
1847                                       &ip_o_10_10_10_2,
1848                                       &ip_o_10_10_10_2,
1849                                       &ip_o_10_10_10_2,
1850                                       &ip_o_10_10_10_2,
1851                                       &ip_o_10_10_10_1),
1852              "6.6.6.6/32 via 10.10.10.1 and 10.10.10.2 in 63:1 ratio");
1853
1854     fib_table_entry_path_add(fib_index,
1855                              &pfx_6_6_6_6_s_32,
1856                              FIB_SOURCE_API,
1857                              FIB_ENTRY_FLAG_NONE,
1858                              DPO_PROTO_IP4,
1859                              &nh_12_12_12_12,
1860                              tm->hw[1]->sw_if_index,
1861                              ~0, // invalid fib index
1862                              100,
1863                              NULL,
1864                              FIB_ROUTE_PATH_FLAG_NONE);
1865
1866     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
1867     FIB_TEST(!fib_test_validate_entry(fei,
1868                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
1869                                       128,
1870                                       &ip_o_10_10_10_1,
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_o_10_10_10_2,
1931                                       &ip_o_10_10_10_2,
1932                                       &ip_o_10_10_10_2,
1933                                       &ip_o_10_10_10_2,
1934                                       &ip_o_10_10_10_2,
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                                       &ip_6_6_6_6_o_12_12_12_12,
1994                                       &ip_6_6_6_6_o_12_12_12_12,
1995                                       &ip_6_6_6_6_o_12_12_12_12,
1996                                       &ip_6_6_6_6_o_12_12_12_12,
1997                                       &ip_6_6_6_6_o_12_12_12_12),
1998              "6.6.6.6/32 via 10.10.10.1 and 10.10.10.2 in 63:1 ratio");
1999
2000     fib_table_entry_path_remove(fib_index,
2001                                 &pfx_6_6_6_6_s_32,
2002                                 FIB_SOURCE_API,
2003                                 DPO_PROTO_IP4,
2004                                 &nh_12_12_12_12,
2005                                 tm->hw[1]->sw_if_index,
2006                                 ~0, // invalid fib index
2007                                 100,
2008                                 FIB_ROUTE_PATH_FLAG_NONE);
2009
2010     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
2011     FIB_TEST(!fib_test_validate_entry(fei,
2012                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
2013                                       64,
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_2,
2073                                       &ip_o_10_10_10_2,
2074                                       &ip_o_10_10_10_2,
2075                                       &ip_o_10_10_10_2,
2076                                       &ip_o_10_10_10_2,
2077                                       &ip_o_10_10_10_1),
2078              "6.6.6.6/32 via 10.10.10.1 and 10.10.10.2 in 63:1 ratio");
2079
2080     fib_table_entry_path_remove(fib_index,
2081                                 &pfx_6_6_6_6_s_32,
2082                                 FIB_SOURCE_API,
2083                                 DPO_PROTO_IP4,
2084                                 &nh_10_10_10_2,
2085                                 tm->hw[0]->sw_if_index,
2086                                 ~0, // invalid fib index
2087                                 100,
2088                                 FIB_ROUTE_PATH_FLAG_NONE);
2089
2090     fei = fib_table_lookup(fib_index, &pfx_6_6_6_6_s_32);
2091     FIB_TEST(!fib_test_validate_entry(fei,
2092                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
2093                                       1,
2094                                       &ip_o_10_10_10_1),
2095              "6.6.6.6/32 via 10.10.10.1");
2096
2097     fib_table_entry_delete(fib_index, &pfx_6_6_6_6_s_32, FIB_SOURCE_API);
2098
2099     /*
2100      * A recursive via the two unequal cost entries
2101      */
2102     fib_prefix_t bgp_44_s_32 = {
2103         .fp_len = 32,
2104         .fp_proto = FIB_PROTOCOL_IP4,
2105         .fp_addr = {
2106             /* 200.200.200.201/32 */
2107             .ip4.as_u32 = clib_host_to_net_u32(0x44444444),
2108         },
2109     };
2110     fei = fib_table_entry_path_add(fib_index,
2111                                    &bgp_44_s_32,
2112                                    FIB_SOURCE_API,
2113                                    FIB_ENTRY_FLAG_NONE,
2114                                    DPO_PROTO_IP4,
2115                                    &pfx_1_2_3_4_s_32.fp_addr,
2116                                    ~0,
2117                                    fib_index,
2118                                    1,
2119                                    NULL,
2120                                    FIB_ROUTE_PATH_FLAG_NONE);
2121     fei = fib_table_entry_path_add(fib_index,
2122                                    &bgp_44_s_32,
2123                                    FIB_SOURCE_API,
2124                                    FIB_ENTRY_FLAG_NONE,
2125                                    DPO_PROTO_IP4,
2126                                    &pfx_1_2_3_5_s_32.fp_addr,
2127                                    ~0,
2128                                    fib_index,
2129                                    1,
2130                                    NULL,
2131                                    FIB_ROUTE_PATH_FLAG_NONE);
2132
2133     FIB_TEST_REC_FORW(&bgp_44_s_32, &pfx_1_2_3_4_s_32, 0);
2134     FIB_TEST_REC_FORW(&bgp_44_s_32, &pfx_1_2_3_5_s_32, 1);
2135     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 2,
2136                                     tm->hw[0]->sw_if_index,
2137                                     tm->hw[1]->sw_if_index),
2138              "RPF list for 1.2.3.4/32 contains both adjs");
2139
2140     /*
2141      * test the uRPF check functions
2142      */
2143     dpo_id_t dpo_44 = DPO_INVALID;
2144     index_t urpfi;
2145
2146     fib_entry_contribute_forwarding(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, &dpo_44);
2147     urpfi = load_balance_get_urpf(dpo_44.dpoi_index);
2148
2149     FIB_TEST(fib_urpf_check(urpfi, tm->hw[0]->sw_if_index),
2150              "uRPF check for 68.68.68.68/32 on %d OK",
2151              tm->hw[0]->sw_if_index);
2152     FIB_TEST(fib_urpf_check(urpfi, tm->hw[1]->sw_if_index),
2153              "uRPF check for 68.68.68.68/32 on %d OK",
2154              tm->hw[1]->sw_if_index);
2155     FIB_TEST(!fib_urpf_check(urpfi, 99),
2156              "uRPF check for 68.68.68.68/32 on 99 not-OK",
2157              99);
2158     dpo_reset(&dpo_44);
2159
2160     fib_table_entry_delete(fib_index,
2161                            &bgp_44_s_32,
2162                            FIB_SOURCE_API);
2163     fib_table_entry_delete(fib_index,
2164                            &pfx_1_2_3_5_s_32,
2165                            FIB_SOURCE_API);
2166     fib_table_entry_delete(fib_index,
2167                            &pfx_1_2_3_4_s_32,
2168                            FIB_SOURCE_API);
2169
2170     /*
2171      * Add a recursive route:
2172      *   200.200.200.201/32 via 1.1.1.200/32  => the via entry is NOT installed.
2173      */
2174     fib_prefix_t bgp_201_pfx = {
2175         .fp_len = 32,
2176         .fp_proto = FIB_PROTOCOL_IP4,
2177         .fp_addr = {
2178             /* 200.200.200.201/32 */
2179             .ip4.as_u32 = clib_host_to_net_u32(0xc8c8c8c9),
2180         },
2181     };
2182     /* via 1.1.1.200 */
2183     fib_prefix_t pfx_1_1_1_200_s_32 = {
2184         .fp_len = 32,
2185         .fp_proto = FIB_PROTOCOL_IP4,
2186         .fp_addr = {
2187             .ip4.as_u32 = clib_host_to_net_u32(0x010101c8),
2188         },
2189     };
2190
2191     fei = fib_table_entry_path_add(fib_index,
2192                                    &bgp_201_pfx,
2193                                    FIB_SOURCE_API,
2194                                    FIB_ENTRY_FLAG_NONE,
2195                                    DPO_PROTO_IP4,
2196                                    &pfx_1_1_1_200_s_32.fp_addr,
2197                                    ~0, // no index provided.
2198                                    fib_index, // nexthop in same fib as route
2199                                    1,
2200                                    NULL,
2201                                    FIB_ROUTE_PATH_FLAG_NONE);
2202
2203     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2204              "Recursive via unresolved is drop");
2205
2206     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_200_s_32);
2207     FIB_TEST((FIB_ENTRY_FLAG_NONE == fib_entry_get_flags(fei)),
2208              "Flags set on RR via non-attached");
2209     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 0),
2210              "RPF list for BGP route empty");
2211
2212     /*
2213      * +2 entry (BGP & RR) and +1 shared-path-list
2214      */
2215     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2216              fib_path_list_db_size());
2217     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2218              fib_path_list_pool_size());
2219     FIB_TEST((ENBR+12 == fib_entry_pool_size()), "entry pool size is %d",
2220              fib_entry_pool_size());
2221
2222     /*
2223      * insert a route that covers the missing 1.1.1.2/32. we epxect
2224      * 200.200.200.200/32 and 200.200.200.201/32 to resolve through it.
2225      */
2226     fib_prefix_t pfx_1_1_1_0_s_24 = {
2227         .fp_len = 24,
2228         .fp_proto = FIB_PROTOCOL_IP4,
2229         .fp_addr = {
2230             /* 1.1.1.0/24 */
2231             .ip4.as_u32 = clib_host_to_net_u32(0x01010100),
2232         },
2233     };
2234
2235     fib_table_entry_path_add(fib_index,
2236                              &pfx_1_1_1_0_s_24,
2237                              FIB_SOURCE_API,
2238                              FIB_ENTRY_FLAG_NONE,
2239                              DPO_PROTO_IP4,
2240                              &nh_10_10_10_1,
2241                              tm->hw[0]->sw_if_index,
2242                              ~0, // invalid fib index
2243                              1,
2244                              NULL,
2245                              FIB_ROUTE_PATH_FLAG_NONE);
2246     fei = fib_table_lookup(fib_index, &pfx_1_1_1_0_s_24);
2247     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2248     ai = fib_entry_get_adj(fei);
2249     FIB_TEST((ai_01 == ai), "1.1.1.0/24 resolves via 10.10.10.1");
2250     fei = fib_table_lookup(fib_index, &pfx_1_1_1_2_s_32);
2251     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2252     ai = fib_entry_get_adj(fei);
2253     FIB_TEST((ai_01 == ai), "1.1.1.2/32 resolves via 10.10.10.1");
2254     fei = fib_table_lookup(fib_index, &pfx_1_1_1_200_s_32);
2255     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2256     ai = fib_entry_get_adj(fei);
2257     FIB_TEST((ai_01 == ai), "1.1.1.200/24 resolves via 10.10.10.1");
2258
2259     /*
2260      * +1 entry. 1.1.1.1/32 already uses 10.10.10.1 so no new pah-list
2261      */
2262     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2263              fib_path_list_db_size());
2264     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2265              fib_path_list_pool_size());
2266     FIB_TEST((ENBR+13 == fib_entry_pool_size()), "entry pool size is %d",
2267              fib_entry_pool_size());
2268
2269     /*
2270      * the recursive adj for 200.200.200.200 should be updated.
2271      */
2272     FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_200_s_32, 0);
2273     FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
2274     fei = fib_table_lookup(fib_index, &bgp_200_pfx);
2275     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1,
2276                                     tm->hw[0]->sw_if_index),
2277              "RPF list for BGP route has itf index 0");
2278
2279     /*
2280      * insert a more specific route than 1.1.1.0/24 that also covers the
2281      * missing 1.1.1.2/32, but not 1.1.1.200/32. we expect
2282      * 200.200.200.200 to resolve through it.
2283      */
2284     fib_prefix_t pfx_1_1_1_0_s_28 = {
2285         .fp_len = 28,
2286         .fp_proto = FIB_PROTOCOL_IP4,
2287         .fp_addr = {
2288             /* 1.1.1.0/24 */
2289             .ip4.as_u32 = clib_host_to_net_u32(0x01010100),
2290         },
2291     };
2292
2293     fib_table_entry_path_add(fib_index,
2294                              &pfx_1_1_1_0_s_28,
2295                              FIB_SOURCE_API,
2296                              FIB_ENTRY_FLAG_NONE,
2297                              DPO_PROTO_IP4,
2298                              &nh_10_10_10_2,
2299                              tm->hw[0]->sw_if_index,
2300                              ~0, // invalid fib index
2301                              1,
2302                              NULL,
2303                              FIB_ROUTE_PATH_FLAG_NONE);
2304     fei = fib_table_lookup(fib_index, &pfx_1_1_1_0_s_28);
2305     dpo2 = fib_entry_contribute_ip_forwarding(fei);
2306     ai = fib_entry_get_adj(fei);
2307     FIB_TEST((ai_02 == ai), "1.1.1.0/24 resolves via 10.10.10.2");
2308
2309     /*
2310      * +1 entry. +1 shared path-list
2311      */
2312     FIB_TEST((5  == fib_path_list_db_size()),   "path list DB population:%d",
2313              fib_path_list_db_size());
2314     FIB_TEST((PNBR+9 == fib_path_list_pool_size()), "path list pool size is %d",
2315              fib_path_list_pool_size());
2316     FIB_TEST((ENBR+14 == fib_entry_pool_size()), "entry pool size is %d",
2317              fib_entry_pool_size());
2318
2319     /*
2320      * the recursive adj for 200.200.200.200 should be updated.
2321      * 200.200.200.201 remains unchanged.
2322      */
2323     FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_200_s_32, 0);
2324     FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
2325
2326     /*
2327      * remove this /28. 200.200.200.200/32 should revert back to via 1.1.1.0/24
2328      */
2329     fib_table_entry_path_remove(fib_index,
2330                                 &pfx_1_1_1_0_s_28,
2331                                 FIB_SOURCE_API,
2332                                 DPO_PROTO_IP4,
2333                                 &nh_10_10_10_2,
2334                                 tm->hw[0]->sw_if_index,
2335                                 ~0,
2336                                 1,
2337                                 FIB_ROUTE_PATH_FLAG_NONE);
2338     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_0_s_28) ==
2339               FIB_NODE_INDEX_INVALID),
2340              "1.1.1.0/28 removed");
2341     FIB_TEST((fib_table_lookup(fib_index, &pfx_1_1_1_0_s_28) ==
2342               fib_table_lookup(fib_index, &pfx_1_1_1_0_s_24)),
2343              "1.1.1.0/28 lookup via /24");
2344     FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_200_s_32, 0);
2345     FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
2346
2347     /*
2348      * -1 entry. -1 shared path-list
2349      */
2350     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2351              fib_path_list_db_size());
2352     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2353              fib_path_list_pool_size());
2354     FIB_TEST((ENBR+13 == fib_entry_pool_size()), "entry pool size is %d",
2355              fib_entry_pool_size());
2356
2357     /*
2358      * remove 1.1.1.0/24. 200.200.200.200/32 should revert back to via 0.0.0.0/0
2359      */
2360     fib_table_entry_path_remove(fib_index,
2361                                 &pfx_1_1_1_0_s_24,
2362                                 FIB_SOURCE_API,
2363                                 DPO_PROTO_IP4,
2364                                 &nh_10_10_10_1,
2365                                 tm->hw[0]->sw_if_index,
2366                                 ~0,
2367                                 1,
2368                                 FIB_ROUTE_PATH_FLAG_NONE);
2369     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_0_s_24) ==
2370               FIB_NODE_INDEX_INVALID),
2371              "1.1.1.0/24 removed");
2372
2373     fei = fib_table_lookup(fib_index, &pfx_1_1_1_2_s_32);
2374     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2375              "1.1.1.2/32 route is DROP");
2376     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_200_s_32);
2377     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2378              "1.1.1.200/32 route is DROP");
2379
2380     fei = fib_table_lookup_exact_match(fib_index, &bgp_201_pfx);
2381     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2382              "201 is drop");
2383     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
2384     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2385              "200 is drop");
2386
2387     /*
2388      * -1 entry
2389      */
2390     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2391              fib_path_list_db_size());
2392     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2393              fib_path_list_pool_size());
2394     FIB_TEST((ENBR+12 == fib_entry_pool_size()), "entry pool size is %d",
2395              fib_entry_pool_size());
2396
2397     /*
2398      * insert the missing 1.1.1.2/32
2399      */
2400     fei = fib_table_entry_path_add(fib_index,
2401                                    &pfx_1_1_1_2_s_32,
2402                                    FIB_SOURCE_API,
2403                                    FIB_ENTRY_FLAG_NONE,
2404                                    DPO_PROTO_IP4,
2405                                    &nh_10_10_10_1,
2406                                    tm->hw[0]->sw_if_index,
2407                                    ~0, // invalid fib index
2408                                    1,
2409                                    NULL,
2410                                    FIB_ROUTE_PATH_FLAG_NONE);
2411     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2412     ai = fib_entry_get_adj(fei);
2413     FIB_TEST((ai = ai_01), "1.1.1.2/32 resolves via 10.10.10.1");
2414
2415     fei = fib_table_lookup_exact_match(fib_index, &bgp_201_pfx);
2416     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2417              "201 is drop");
2418     FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
2419
2420     /*
2421      * no change. 1.1.1.2/32 was already there RR sourced.
2422      */
2423     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2424              fib_path_list_db_size());
2425     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2426              fib_path_list_pool_size());
2427     FIB_TEST((ENBR+12 == fib_entry_pool_size()), "entry pool size is %d",
2428              fib_entry_pool_size());
2429
2430     /*
2431      * give 201 a resolved path.
2432      *  it now has the unresolved 1.1.1.200 and the resolved 1.1.1.2,
2433      *  only the latter contributes forwarding.
2434      */
2435     fei = fib_table_entry_path_add(fib_index,
2436                                    &bgp_201_pfx,
2437                                    FIB_SOURCE_API,
2438                                    FIB_ENTRY_FLAG_NONE,
2439                                    DPO_PROTO_IP4,
2440                                    &pfx_1_1_1_2_s_32.fp_addr,
2441                                    ~0,
2442                                    fib_index,
2443                                    1,
2444                                    NULL,
2445                                    FIB_ROUTE_PATH_FLAG_NONE);
2446     FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_2_s_32, 0);
2447     fib_table_entry_path_remove(fib_index,
2448                                 &bgp_201_pfx,
2449                                 FIB_SOURCE_API,
2450                                 DPO_PROTO_IP4,
2451                                 &pfx_1_1_1_2_s_32.fp_addr,
2452                                 ~0,
2453                                 fib_index,
2454                                 1,
2455                                 FIB_ROUTE_PATH_FLAG_NONE);
2456
2457     /*
2458      * remove 200.200.200.201/32 which does not have a valid via FIB
2459      */
2460     fib_table_entry_path_remove(fib_index,
2461                                 &bgp_201_pfx,
2462                                 FIB_SOURCE_API,
2463                                 DPO_PROTO_IP4,
2464                                 &pfx_1_1_1_200_s_32.fp_addr,
2465                                 ~0, // no index provided.
2466                                 fib_index,
2467                                 1,
2468                                 FIB_ROUTE_PATH_FLAG_NONE);
2469
2470     /*
2471      * -2 entries (BGP and RR). -1 shared path-list;
2472      */
2473     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_201_pfx) ==
2474               FIB_NODE_INDEX_INVALID),
2475              "200.200.200.201/32 removed");
2476     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_200_s_32) ==
2477               FIB_NODE_INDEX_INVALID),
2478              "1.1.1.200/32 removed");
2479
2480     FIB_TEST((3  == fib_path_list_db_size()),   "path list DB population:%d",
2481              fib_path_list_db_size());
2482     FIB_TEST((PNBR+7 == fib_path_list_pool_size()), "path list pool size is %d",
2483              fib_path_list_pool_size());
2484     FIB_TEST((ENBR+10 == fib_entry_pool_size()), "entry pool size is %d",
2485              fib_entry_pool_size());
2486
2487     /*
2488      * remove 200.200.200.200/32 which does have a valid via FIB
2489      */
2490     fib_table_entry_path_remove(fib_index,
2491                                 &bgp_200_pfx,
2492                                 FIB_SOURCE_API,
2493                                 DPO_PROTO_IP4,
2494                                 &pfx_1_1_1_2_s_32.fp_addr,
2495                                 ~0, // no index provided.
2496                                 fib_index,
2497                                 1,
2498                                 FIB_ROUTE_PATH_FLAG_NONE);
2499
2500     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_200_pfx) ==
2501               FIB_NODE_INDEX_INVALID),
2502              "200.200.200.200/32 removed");
2503     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_2_s_32) !=
2504               FIB_NODE_INDEX_INVALID),
2505              "1.1.1.2/32 still present");
2506
2507     /*
2508      * -1 entry (BGP, the RR source is also API sourced). -1 shared path-list;
2509      */
2510     FIB_TEST((2  == fib_path_list_db_size()),   "path list DB population:%d",
2511              fib_path_list_db_size());
2512     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
2513              fib_path_list_pool_size());
2514     FIB_TEST((ENBR+9 == fib_entry_pool_size()), "entry pool size is %d",
2515              fib_entry_pool_size());
2516
2517     /*
2518      * A recursive prefix that has a 2 path  load-balance.
2519      * It also shares a next-hop with other BGP prefixes and hence
2520      * test the ref counting of RR sourced prefixes and 2 level LB.
2521      */
2522     const fib_prefix_t bgp_102 = {
2523         .fp_len = 32,
2524         .fp_proto = FIB_PROTOCOL_IP4,
2525         .fp_addr = {
2526             /* 100.100.100.101/32 */
2527             .ip4.as_u32 = clib_host_to_net_u32(0x64646466),
2528         },
2529     };
2530     fib_table_entry_path_add(fib_index,
2531                              &bgp_102,
2532                              FIB_SOURCE_API,
2533                              FIB_ENTRY_FLAG_NONE,
2534                              DPO_PROTO_IP4,
2535                              &pfx_1_1_1_1_s_32.fp_addr,
2536                              ~0, // no index provided.
2537                              fib_index, // same as route
2538                              1,
2539                              NULL,
2540                              FIB_ROUTE_PATH_FLAG_NONE);
2541     fib_table_entry_path_add(fib_index,
2542                              &bgp_102,
2543                              FIB_SOURCE_API,
2544                              FIB_ENTRY_FLAG_NONE,
2545                              DPO_PROTO_IP4,
2546                              &pfx_1_1_1_2_s_32.fp_addr,
2547                              ~0, // no index provided.
2548                              fib_index, // same as route's FIB
2549                              1,
2550                              NULL,
2551                              FIB_ROUTE_PATH_FLAG_NONE);
2552     fei = fib_table_lookup_exact_match(fib_index, &bgp_102);
2553     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "100.100.100.102/32 presnet");
2554     dpo = fib_entry_contribute_ip_forwarding(fei);
2555
2556     fei  = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_1_s_32);
2557     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2558     fei  = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_2_s_32);
2559     dpo2 = fib_entry_contribute_ip_forwarding(fei);
2560
2561     lb = load_balance_get(dpo->dpoi_index);
2562     FIB_TEST((lb->lb_n_buckets == 2), "Recursive LB has %d bucket", lb->lb_n_buckets);
2563     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo->dpoi_index, 0)),
2564              "First via 10.10.10.1");
2565     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo->dpoi_index, 1)),
2566              "Second via 10.10.10.1");
2567
2568     fib_table_entry_path_remove(fib_index,
2569                                 &bgp_102,
2570                                 FIB_SOURCE_API,
2571                                 DPO_PROTO_IP4,
2572                                 &pfx_1_1_1_1_s_32.fp_addr,
2573                                 ~0, // no index provided.
2574                                 fib_index, // same as route's FIB
2575                                 1,
2576                                 FIB_ROUTE_PATH_FLAG_NONE);
2577     fib_table_entry_path_remove(fib_index,
2578                                 &bgp_102,
2579                                 FIB_SOURCE_API,
2580                                 DPO_PROTO_IP4,
2581                                 &pfx_1_1_1_2_s_32.fp_addr,
2582                                 ~0, // no index provided.
2583                                 fib_index, // same as route's FIB
2584                                 1,
2585                                 FIB_ROUTE_PATH_FLAG_NONE);
2586     fei = fib_table_lookup_exact_match(fib_index, &bgp_102);
2587     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "100.100.100.102/32 removed");
2588
2589     /*
2590      * remove the remaining recursives
2591      */
2592     fib_table_entry_path_remove(fib_index,
2593                                 &bgp_100_pfx,
2594                                 FIB_SOURCE_API,
2595                                 DPO_PROTO_IP4,
2596                                 &pfx_1_1_1_1_s_32.fp_addr,
2597                                 ~0, // no index provided.
2598                                 fib_index, // same as route's FIB
2599                                 1,
2600                                 FIB_ROUTE_PATH_FLAG_NONE);
2601     fib_table_entry_path_remove(fib_index,
2602                                 &bgp_101_pfx,
2603                                 FIB_SOURCE_API,
2604                                 DPO_PROTO_IP4,
2605                                 &pfx_1_1_1_1_s_32.fp_addr,
2606                                 ~0, // no index provided.
2607                                 fib_index, // same as route's FIB
2608                                 1,
2609                                 FIB_ROUTE_PATH_FLAG_NONE);
2610     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_100_pfx) ==
2611               FIB_NODE_INDEX_INVALID),
2612              "100.100.100.100/32 removed");
2613     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_101_pfx) ==
2614               FIB_NODE_INDEX_INVALID),
2615              "100.100.100.101/32 removed");
2616
2617     /*
2618      * -2 entry (2*BGP, the RR source is also API sourced). -1 shared path-list;
2619      */
2620     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
2621              fib_path_list_db_size());
2622     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
2623              fib_path_list_pool_size());
2624     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
2625              fib_entry_pool_size());
2626
2627     /*
2628      * Add a recursive route via a connected cover, using an adj-fib that does exist
2629      */
2630     fib_table_entry_path_add(fib_index,
2631                              &bgp_200_pfx,
2632                              FIB_SOURCE_API,
2633                              FIB_ENTRY_FLAG_NONE,
2634                              DPO_PROTO_IP4,
2635                              &nh_10_10_10_1,
2636                              ~0, // no index provided.
2637                              fib_index, // Same as route's FIB
2638                              1,
2639                              NULL,
2640                              FIB_ROUTE_PATH_FLAG_NONE);
2641
2642     /*
2643      * +1 entry. +1 shared path-list (recursive via 10.10.10.1)
2644      */
2645     FIB_TEST((2  == fib_path_list_db_size()),   "path list DB population:%d",
2646              fib_path_list_db_size());
2647     FIB_TEST((PNBR+6 == fib_path_list_pool_size()), "path list pool size is %d",
2648              fib_path_list_pool_size());
2649     FIB_TEST((ENBR+8 == fib_entry_pool_size()), "entry pool size is %d",
2650              fib_entry_pool_size());
2651
2652     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
2653     dpo = fib_entry_contribute_ip_forwarding(fei);
2654
2655     fei  = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
2656     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2657
2658     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo->dpoi_index, 0)),
2659              "200.200.200.200/32 is recursive via adj for 10.10.10.1");
2660
2661     FIB_TEST((FIB_ENTRY_FLAG_ATTACHED  == fib_entry_get_flags(fei)),
2662              "Flags set on RR via existing attached");
2663
2664     /*
2665      * Add a recursive route via a connected cover, using and adj-fib that does
2666      * not exist
2667      */
2668     ip46_address_t nh_10_10_10_3 = {
2669         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a03),
2670     };
2671     fib_prefix_t pfx_10_10_10_3 = {
2672         .fp_len = 32,
2673         .fp_proto = FIB_PROTOCOL_IP4,
2674         .fp_addr = nh_10_10_10_3,
2675     };
2676
2677     fib_table_entry_path_add(fib_index,
2678                              &bgp_201_pfx,
2679                              FIB_SOURCE_API,
2680                              FIB_ENTRY_FLAG_NONE,
2681                              DPO_PROTO_IP4,
2682                              &nh_10_10_10_3,
2683                              ~0, // no index provided.
2684                              fib_index,
2685                              1,
2686                              NULL,
2687                              FIB_ROUTE_PATH_FLAG_NONE);
2688
2689     /*
2690      * +2 entries (BGP and RR). +1 shared path-list (recursive via 10.10.10.3) and
2691      * one unshared non-recursive via 10.10.10.3
2692      */
2693     FIB_TEST((3  == fib_path_list_db_size()),   "path list DB population:%d",
2694              fib_path_list_db_size());
2695     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2696              fib_path_list_pool_size());
2697     FIB_TEST((ENBR+10 == fib_entry_pool_size()), "entry pool size is %d",
2698              fib_entry_pool_size());
2699
2700     ai_03 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
2701                                 VNET_LINK_IP4,
2702                                 &nh_10_10_10_3,
2703                                 tm->hw[0]->sw_if_index);
2704
2705     fei  = fib_table_lookup_exact_match(fib_index, &bgp_201_pfx);
2706     dpo  = fib_entry_contribute_ip_forwarding(fei);
2707     fei  = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3);
2708     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2709
2710     ai = fib_entry_get_adj(fei);
2711     FIB_TEST((ai == ai_03), "adj for 10.10.10.3/32 is via adj for 10.10.10.3");
2712     FIB_TEST(((FIB_ENTRY_FLAG_ATTACHED | FIB_ENTRY_FLAG_CONNECTED) ==
2713               fib_entry_get_flags(fei)),
2714              "Flags set on RR via non-existing attached");
2715
2716     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo->dpoi_index, 0)),
2717              "adj for 200.200.200.200/32 is recursive via adj for 10.10.10.3");
2718
2719     adj_unlock(ai_03);
2720
2721     /*
2722      * remove the recursives
2723      */
2724     fib_table_entry_path_remove(fib_index,
2725                                 &bgp_200_pfx,
2726                                 FIB_SOURCE_API,
2727                                 DPO_PROTO_IP4,
2728                                 &nh_10_10_10_1,
2729                                 ~0, // no index provided.
2730                                 fib_index, // same as route's FIB
2731                                 1,
2732                                 FIB_ROUTE_PATH_FLAG_NONE);
2733     fib_table_entry_path_remove(fib_index,
2734                                 &bgp_201_pfx,
2735                                 FIB_SOURCE_API,
2736                                 DPO_PROTO_IP4,
2737                                 &nh_10_10_10_3,
2738                                 ~0, // no index provided.
2739                                 fib_index, // same as route's FIB
2740                                 1,
2741                                 FIB_ROUTE_PATH_FLAG_NONE);
2742
2743     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_201_pfx) ==
2744               FIB_NODE_INDEX_INVALID),
2745              "200.200.200.201/32 removed");
2746     FIB_TEST((fib_table_lookup_exact_match(fib_index, &bgp_200_pfx) ==
2747               FIB_NODE_INDEX_INVALID),
2748              "200.200.200.200/32 removed");
2749     FIB_TEST((fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3) ==
2750               FIB_NODE_INDEX_INVALID),
2751              "10.10.10.3/32 removed");
2752
2753     /*
2754      * -3 entries (2*BGP and RR). -2 shared path-list (recursive via 10.10.10.3 &
2755      *  10.10.10.1) and one unshared non-recursive via 10.10.10.3
2756      */
2757     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
2758              fib_path_list_db_size());
2759     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
2760              fib_path_list_pool_size());
2761     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
2762              fib_entry_pool_size());
2763
2764
2765     /*
2766      * RECURSION LOOPS
2767      *  Add 5.5.5.5/32 -> 5.5.5.6/32 -> 5.5.5.7/32 -> 5.5.5.5/32
2768      */
2769     fib_prefix_t pfx_5_5_5_5_s_32 = {
2770         .fp_len = 32,
2771         .fp_proto = FIB_PROTOCOL_IP4,
2772         .fp_addr = {
2773             .ip4.as_u32 = clib_host_to_net_u32(0x05050505),
2774         },
2775     };
2776     fib_prefix_t pfx_5_5_5_6_s_32 = {
2777         .fp_len = 32,
2778         .fp_proto = FIB_PROTOCOL_IP4,
2779         .fp_addr = {
2780             .ip4.as_u32 = clib_host_to_net_u32(0x05050506),
2781         },
2782     };
2783     fib_prefix_t pfx_5_5_5_7_s_32 = {
2784         .fp_len = 32,
2785         .fp_proto = FIB_PROTOCOL_IP4,
2786         .fp_addr = {
2787             .ip4.as_u32 = clib_host_to_net_u32(0x05050507),
2788         },
2789     };
2790
2791     fib_table_entry_path_add(fib_index,
2792                              &pfx_5_5_5_5_s_32,
2793                              FIB_SOURCE_API,
2794                              FIB_ENTRY_FLAG_NONE,
2795                              DPO_PROTO_IP4,
2796                              &pfx_5_5_5_6_s_32.fp_addr,
2797                              ~0, // no index provided.
2798                              fib_index,
2799                              1,
2800                              NULL,
2801                              FIB_ROUTE_PATH_FLAG_NONE);
2802     fib_table_entry_path_add(fib_index,
2803                              &pfx_5_5_5_6_s_32,
2804                              FIB_SOURCE_API,
2805                              FIB_ENTRY_FLAG_NONE,
2806                              DPO_PROTO_IP4,
2807                              &pfx_5_5_5_7_s_32.fp_addr,
2808                              ~0, // no index provided.
2809                              fib_index,
2810                              1,
2811                              NULL,
2812                              FIB_ROUTE_PATH_FLAG_NONE);
2813     fib_table_entry_path_add(fib_index,
2814                              &pfx_5_5_5_7_s_32,
2815                              FIB_SOURCE_API,
2816                              FIB_ENTRY_FLAG_NONE,
2817                              DPO_PROTO_IP4,
2818                              &pfx_5_5_5_5_s_32.fp_addr,
2819                              ~0, // no index provided.
2820                              fib_index,
2821                              1,
2822                              NULL,
2823                              FIB_ROUTE_PATH_FLAG_NONE);
2824     /*
2825      * +3 entries, +3 shared path-list
2826      */
2827     FIB_TEST((4  == fib_path_list_db_size()),   "path list DB population:%d",
2828              fib_path_list_db_size());
2829     FIB_TEST((PNBR+8 == fib_path_list_pool_size()), "path list pool size is %d",
2830              fib_path_list_pool_size());
2831     FIB_TEST((ENBR+10 == fib_entry_pool_size()), "entry pool size is %d",
2832              fib_entry_pool_size());
2833
2834     /*
2835      * All the entries have only looped paths, so they are all drop
2836      */
2837     fei = fib_table_lookup(fib_index, &pfx_5_5_5_7_s_32);
2838     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2839              "LB for 5.5.5.7/32 is via adj for DROP");
2840     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2841     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2842              "LB for 5.5.5.5/32 is via adj for DROP");
2843     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
2844     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2845              "LB for 5.5.5.6/32 is via adj for DROP");
2846
2847     /*
2848      * provide 5.5.5.6/32 with alternate path.
2849      * this will allow only 5.5.5.6/32 to forward with this path, the others
2850      * are still drop since the loop is still present.
2851      */
2852     fib_table_entry_path_add(fib_index,
2853                              &pfx_5_5_5_6_s_32,
2854                              FIB_SOURCE_API,
2855                              FIB_ENTRY_FLAG_NONE,
2856                              DPO_PROTO_IP4,
2857                              &nh_10_10_10_1,
2858                              tm->hw[0]->sw_if_index,
2859                              ~0,
2860                              1,
2861                              NULL,
2862                              FIB_ROUTE_PATH_FLAG_NONE);
2863
2864     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
2865     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2866
2867     lb = load_balance_get(dpo1->dpoi_index);
2868     FIB_TEST((lb->lb_n_buckets == 1), "5.5.5.6 LB has %d bucket", lb->lb_n_buckets);
2869
2870     dpo2 = load_balance_get_bucket(dpo1->dpoi_index, 0);
2871     FIB_TEST(DPO_ADJACENCY == dpo2->dpoi_type, "type is %d", dpo2->dpoi_type);
2872     FIB_TEST((ai_01 == dpo2->dpoi_index),
2873              "5.5.5.6 bucket 0 resolves via 10.10.10.2");
2874
2875     fei = fib_table_lookup(fib_index, &pfx_5_5_5_7_s_32);
2876     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2877              "LB for 5.5.5.7/32 is via adj for DROP");
2878     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2879     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2880              "LB for 5.5.5.5/32 is via adj for DROP");
2881
2882     /*
2883      * remove the alternate path for 5.5.5.6/32
2884      * back to all drop
2885      */
2886     fib_table_entry_path_remove(fib_index,
2887                                 &pfx_5_5_5_6_s_32,
2888                                 FIB_SOURCE_API,
2889                                 DPO_PROTO_IP4,
2890                                 &nh_10_10_10_1,
2891                                 tm->hw[0]->sw_if_index,
2892                                 ~0,
2893                                 1,
2894                                 FIB_ROUTE_PATH_FLAG_NONE);
2895
2896     fei = fib_table_lookup(fib_index, &pfx_5_5_5_7_s_32);
2897     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2898              "LB for 5.5.5.7/32 is via adj for DROP");
2899     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2900     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2901              "LB for 5.5.5.5/32 is via adj for DROP");
2902     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
2903     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2904              "LB for 5.5.5.6/32 is via adj for DROP");
2905
2906     /*
2907      * break the loop by giving 5.5.5.5/32 a new set of paths
2908      * expect all to forward via this new path.
2909      */
2910     fib_table_entry_update_one_path(fib_index,
2911                                     &pfx_5_5_5_5_s_32,
2912                                     FIB_SOURCE_API,
2913                                     FIB_ENTRY_FLAG_NONE,
2914                                     DPO_PROTO_IP4,
2915                                     &nh_10_10_10_1,
2916                                     tm->hw[0]->sw_if_index,
2917                                     ~0, // invalid fib index
2918                                     1,
2919                                     NULL,
2920                                     FIB_ROUTE_PATH_FLAG_NONE);
2921
2922     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2923     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2924     lb = load_balance_get(dpo1->dpoi_index);
2925     FIB_TEST((lb->lb_n_buckets == 1), "5.5.5.5 LB has %d bucket", lb->lb_n_buckets);
2926
2927     dpo2 = load_balance_get_bucket(dpo1->dpoi_index, 0);
2928     FIB_TEST(DPO_ADJACENCY == dpo2->dpoi_type, "type is %d", dpo2->dpoi_type);
2929     FIB_TEST((ai_01 == dpo2->dpoi_index),
2930              "5.5.5.5 bucket 0 resolves via 10.10.10.2");
2931
2932     fei = fib_table_lookup_exact_match(fib_index, &pfx_5_5_5_7_s_32);
2933     dpo2 = fib_entry_contribute_ip_forwarding(fei);
2934
2935     lb = load_balance_get(dpo2->dpoi_index);
2936     FIB_TEST((lb->lb_n_buckets == 1), "Recursive LB has %d bucket", lb->lb_n_buckets);
2937     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo2->dpoi_index, 0)),
2938              "5.5.5.5.7 via 5.5.5.5");
2939
2940     fei = fib_table_lookup_exact_match(fib_index, &pfx_5_5_5_6_s_32);
2941     dpo1 = fib_entry_contribute_ip_forwarding(fei);
2942
2943     lb = load_balance_get(dpo1->dpoi_index);
2944     FIB_TEST((lb->lb_n_buckets == 1), "Recursive LB has %d bucket", lb->lb_n_buckets);
2945     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo1->dpoi_index, 0)),
2946              "5.5.5.5.6 via 5.5.5.7");
2947
2948     /*
2949      * revert back to the loop. so we can remove the prefixes with
2950      * the loop intact
2951      */
2952     fib_table_entry_update_one_path(fib_index,
2953                                     &pfx_5_5_5_5_s_32,
2954                                     FIB_SOURCE_API,
2955                                     FIB_ENTRY_FLAG_NONE,
2956                                     DPO_PROTO_IP4,
2957                                     &pfx_5_5_5_6_s_32.fp_addr,
2958                                     ~0, // no index provided.
2959                                     fib_index,
2960                                     1,
2961                                     NULL,
2962                                     FIB_ROUTE_PATH_FLAG_NONE);
2963
2964     fei = fib_table_lookup(fib_index, &pfx_5_5_5_7_s_32);
2965     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2966              "LB for 5.5.5.7/32 is via adj for DROP");
2967     fei = fib_table_lookup(fib_index, &pfx_5_5_5_5_s_32);
2968     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2969              "LB for 5.5.5.5/32 is via adj for DROP");
2970     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
2971     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
2972              "LB for 5.5.5.6/32 is via adj for DROP");
2973
2974     /*
2975      * remove all the 5.5.5.x/32 prefixes
2976      */
2977     fib_table_entry_path_remove(fib_index,
2978                                 &pfx_5_5_5_5_s_32,
2979                                 FIB_SOURCE_API,
2980                                 DPO_PROTO_IP4,
2981                                 &pfx_5_5_5_6_s_32.fp_addr,
2982                                 ~0, // no index provided.
2983                                 fib_index, // same as route's FIB
2984                                 1,
2985                                 FIB_ROUTE_PATH_FLAG_NONE);
2986     fib_table_entry_path_remove(fib_index,
2987                                 &pfx_5_5_5_6_s_32,
2988                                 FIB_SOURCE_API,
2989                                 DPO_PROTO_IP4,
2990                                 &pfx_5_5_5_7_s_32.fp_addr,
2991                                 ~0, // no index provided.
2992                                 fib_index, // same as route's FIB
2993                                 1,
2994                                 FIB_ROUTE_PATH_FLAG_NONE);
2995     fib_table_entry_path_remove(fib_index,
2996                                 &pfx_5_5_5_7_s_32,
2997                                 FIB_SOURCE_API,
2998                                 DPO_PROTO_IP4,
2999                                 &pfx_5_5_5_5_s_32.fp_addr,
3000                                 ~0, // no index provided.
3001                                 fib_index, // same as route's FIB
3002                                 1,
3003                                 FIB_ROUTE_PATH_FLAG_NONE);
3004     fib_table_entry_path_remove(fib_index,
3005                                 &pfx_5_5_5_6_s_32,
3006                                 FIB_SOURCE_API,
3007                                 DPO_PROTO_IP4,
3008                                 &nh_10_10_10_2,
3009                                 ~0, // no index provided.
3010                                 fib_index, // same as route's FIB
3011                                 1,
3012                                 FIB_ROUTE_PATH_FLAG_NONE);
3013
3014     /*
3015      * -3 entries, -3 shared path-list
3016      */
3017     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3018              fib_path_list_db_size());
3019     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3020              fib_path_list_pool_size());
3021     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3022              fib_entry_pool_size());
3023
3024     /*
3025      * Single level loop 5.5.5.5/32 via 5.5.5.5/32
3026      */
3027     fib_table_entry_path_add(fib_index,
3028                              &pfx_5_5_5_6_s_32,
3029                              FIB_SOURCE_API,
3030                              FIB_ENTRY_FLAG_NONE,
3031                              DPO_PROTO_IP4,
3032                              &pfx_5_5_5_6_s_32.fp_addr,
3033                              ~0, // no index provided.
3034                              fib_index,
3035                              1,
3036                              NULL,
3037                              FIB_ROUTE_PATH_FLAG_NONE);
3038     fei = fib_table_lookup(fib_index, &pfx_5_5_5_6_s_32);
3039     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
3040              "1-level 5.5.5.6/32 loop is via adj for DROP");
3041
3042     fib_table_entry_path_remove(fib_index,
3043                                 &pfx_5_5_5_6_s_32,
3044                                 FIB_SOURCE_API,
3045                                 DPO_PROTO_IP4,
3046                                 &pfx_5_5_5_6_s_32.fp_addr,
3047                                 ~0, // no index provided.
3048                                 fib_index, // same as route's FIB
3049                                 1,
3050                                 FIB_ROUTE_PATH_FLAG_NONE);
3051     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3052              fib_table_lookup_exact_match(fib_index, &pfx_5_5_5_6_s_32),
3053              "1-level 5.5.5.6/32 loop is removed");
3054
3055     /*
3056      * A recursive route whose next-hop is covered by the prefix.
3057      * This would mean the via-fib, which inherits forwarding from its
3058      * cover, thus picks up forwarding from the prfix, which is via the
3059      * via-fib, and we have a loop.
3060      */
3061     fib_prefix_t pfx_23_23_23_0_s_24 = {
3062         .fp_len = 24,
3063         .fp_proto = FIB_PROTOCOL_IP4,
3064         .fp_addr = {
3065             .ip4.as_u32 = clib_host_to_net_u32(0x17171700),
3066         },
3067     };
3068     fib_prefix_t pfx_23_23_23_23_s_32 = {
3069         .fp_len = 32,
3070         .fp_proto = FIB_PROTOCOL_IP4,
3071         .fp_addr = {
3072             .ip4.as_u32 = clib_host_to_net_u32(0x17171717),
3073         },
3074     };
3075     fei = fib_table_entry_path_add(fib_index,
3076                                    &pfx_23_23_23_0_s_24,
3077                                    FIB_SOURCE_API,
3078                                    FIB_ENTRY_FLAG_NONE,
3079                                    DPO_PROTO_IP4,
3080                                    &pfx_23_23_23_23_s_32.fp_addr,
3081                                    ~0, // recursive
3082                                    fib_index,
3083                                    1,
3084                                    NULL,
3085                                    FIB_ROUTE_PATH_FLAG_NONE);
3086     dpo = fib_entry_contribute_ip_forwarding(fei);
3087     FIB_TEST(load_balance_is_drop(dpo),
3088              "23.23.23.0/24 via covered is DROP");
3089     fib_table_entry_delete_index(fei, FIB_SOURCE_API);
3090
3091     /*
3092      * add-remove test. no change.
3093      */
3094     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3095              fib_path_list_db_size());
3096     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3097              fib_path_list_pool_size());
3098     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3099              fib_entry_pool_size());
3100
3101     /*
3102      * Make the default route recursive via a unknown next-hop. Thus the
3103      * next hop's cover would be the default route
3104      */
3105     fei = fib_table_entry_path_add(fib_index,
3106                                    &pfx_0_0_0_0_s_0,
3107                                    FIB_SOURCE_API,
3108                                    FIB_ENTRY_FLAG_NONE,
3109                                    DPO_PROTO_IP4,
3110                                    &pfx_23_23_23_23_s_32.fp_addr,
3111                                    ~0, // recursive
3112                                    fib_index,
3113                                    1,
3114                                    NULL,
3115                                    FIB_ROUTE_PATH_FLAG_NONE);
3116     dpo = fib_entry_contribute_ip_forwarding(fei);
3117     FIB_TEST(load_balance_is_drop(dpo),
3118              "0.0.0.0.0/0 via is DROP");
3119     FIB_TEST((fib_entry_get_resolving_interface(fei) == ~0),
3120              "no resolving interface for looped 0.0.0.0/0");
3121
3122     fei = fib_table_lookup_exact_match(fib_index, &pfx_23_23_23_23_s_32);
3123     dpo = fib_entry_contribute_ip_forwarding(fei);
3124     FIB_TEST(load_balance_is_drop(dpo),
3125              "23.23.23.23/32 via is DROP");
3126     FIB_TEST((fib_entry_get_resolving_interface(fei) == ~0),
3127              "no resolving interface for looped 23.23.23.23/32");
3128
3129     fib_table_entry_delete(fib_index, &pfx_0_0_0_0_s_0, FIB_SOURCE_API);
3130
3131     /*
3132      * A recursive route with recursion constraints.
3133      *  200.200.200.200/32 via 1.1.1.1 is recurse via host constrained
3134      */
3135     fib_table_entry_path_add(fib_index,
3136                              &bgp_200_pfx,
3137                              FIB_SOURCE_API,
3138                              FIB_ENTRY_FLAG_NONE,
3139                              DPO_PROTO_IP4,
3140                              &nh_1_1_1_1,
3141                              ~0,
3142                              fib_index,
3143                              1,
3144                              NULL,
3145                              FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3146
3147     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_1_s_32);
3148     dpo2 = fib_entry_contribute_ip_forwarding(fei);
3149
3150     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3151     dpo1 = fib_entry_contribute_ip_forwarding(fei);
3152
3153     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo1->dpoi_index, 0)),
3154              "adj for 200.200.200.200/32 is recursive via adj for 1.1.1.1");
3155
3156     /*
3157      * save the load-balance. we expect it to be inplace modified
3158      */
3159     lb = load_balance_get(dpo1->dpoi_index);
3160
3161     /*
3162      * add a covering prefix for the via fib that would otherwise serve
3163      * as the resolving route when the host is removed
3164      */
3165     fib_table_entry_path_add(fib_index,
3166                              &pfx_1_1_1_0_s_28,
3167                              FIB_SOURCE_API,
3168                              FIB_ENTRY_FLAG_NONE,
3169                              DPO_PROTO_IP4,
3170                              &nh_10_10_10_1,
3171                              tm->hw[0]->sw_if_index,
3172                              ~0, // invalid fib index
3173                              1,
3174                              NULL,
3175                              FIB_ROUTE_PATH_FLAG_NONE);
3176     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_0_s_28);
3177     ai = fib_entry_get_adj(fei);
3178     FIB_TEST((ai == ai_01),
3179              "adj for 1.1.1.0/28 is via adj for 1.1.1.1");
3180
3181     /*
3182      * remove the host via FIB - expect the BGP prefix to be drop
3183      */
3184     fib_table_entry_path_remove(fib_index,
3185                                 &pfx_1_1_1_1_s_32,
3186                                 FIB_SOURCE_API,
3187                                 DPO_PROTO_IP4,
3188                                 &nh_10_10_10_1,
3189                                 tm->hw[0]->sw_if_index,
3190                                 ~0, // invalid fib index
3191                                 1,
3192                                 FIB_ROUTE_PATH_FLAG_NONE);
3193
3194     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo1->dpoi_index, 0)),
3195              "adj for 200.200.200.200/32 is recursive via adj for DROP");
3196
3197     /*
3198      * add the via-entry host reoute back. expect to resolve again
3199      */
3200     fib_table_entry_path_add(fib_index,
3201                              &pfx_1_1_1_1_s_32,
3202                              FIB_SOURCE_API,
3203                              FIB_ENTRY_FLAG_NONE,
3204                              DPO_PROTO_IP4,
3205                              &nh_10_10_10_1,
3206                              tm->hw[0]->sw_if_index,
3207                              ~0, // invalid fib index
3208                              1,
3209                              NULL,
3210                              FIB_ROUTE_PATH_FLAG_NONE);
3211     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo1->dpoi_index, 0)),
3212              "adj for 200.200.200.200/32 is recursive via adj for 1.1.1.1");
3213
3214     /*
3215      * add another path for the recursive. it will then have 2.
3216      */
3217     fib_prefix_t pfx_1_1_1_3_s_32 = {
3218         .fp_len = 32,
3219         .fp_proto = FIB_PROTOCOL_IP4,
3220         .fp_addr = {
3221             .ip4.as_u32 = clib_host_to_net_u32(0x01010103),
3222         },
3223     };
3224     fib_table_entry_path_add(fib_index,
3225                              &pfx_1_1_1_3_s_32,
3226                              FIB_SOURCE_API,
3227                              FIB_ENTRY_FLAG_NONE,
3228                              DPO_PROTO_IP4,
3229                              &nh_10_10_10_2,
3230                              tm->hw[0]->sw_if_index,
3231                              ~0, // invalid fib index
3232                              1,
3233                              NULL,
3234                              FIB_ROUTE_PATH_FLAG_NONE);
3235
3236     fib_table_entry_path_add(fib_index,
3237                              &bgp_200_pfx,
3238                              FIB_SOURCE_API,
3239                              FIB_ENTRY_FLAG_NONE,
3240                              DPO_PROTO_IP4,
3241                              &pfx_1_1_1_3_s_32.fp_addr,
3242                              ~0,
3243                              fib_index,
3244                              1,
3245                              NULL,
3246                              FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3247
3248     /*
3249      * add a bunch load more entries using this path combo so that we get
3250      * an LB-map created.
3251      */
3252 #define N_P 128
3253     fib_prefix_t bgp_78s[N_P];
3254     for (ii = 0; ii < N_P; ii++)
3255     {
3256         bgp_78s[ii].fp_len = 32;
3257         bgp_78s[ii].fp_proto = FIB_PROTOCOL_IP4;
3258         bgp_78s[ii].fp_addr.ip4.as_u32 = clib_host_to_net_u32(0x4e000000+ii);
3259
3260
3261         fib_table_entry_path_add(fib_index,
3262                                  &bgp_78s[ii],
3263                                  FIB_SOURCE_API,
3264                                  FIB_ENTRY_FLAG_NONE,
3265                                  DPO_PROTO_IP4,
3266                                  &pfx_1_1_1_3_s_32.fp_addr,
3267                                  ~0,
3268                                  fib_index,
3269                                  1,
3270                                  NULL,
3271                                  FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3272         fib_table_entry_path_add(fib_index,
3273                                  &bgp_78s[ii],
3274                                  FIB_SOURCE_API,
3275                                  FIB_ENTRY_FLAG_NONE,
3276                                  DPO_PROTO_IP4,
3277                                  &nh_1_1_1_1,
3278                                  ~0,
3279                                  fib_index,
3280                                  1,
3281                                  NULL,
3282                                  FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3283     }
3284
3285     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3286     dpo = fib_entry_contribute_ip_forwarding(fei);
3287
3288     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_1_s_32);
3289     dpo2 = fib_entry_contribute_ip_forwarding(fei);
3290     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket(dpo->dpoi_index, 0)),
3291              "adj for 200.200.200.200/32 is recursive via adj for 1.1.1.1");
3292     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_3_s_32);
3293     dpo1 = fib_entry_contribute_ip_forwarding(fei);
3294     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket(dpo->dpoi_index, 1)),
3295              "adj for 200.200.200.200/32 is recursive via adj for 1.1.1.3");
3296
3297     /*
3298      * expect the lb-map used by the recursive's load-balance is using both buckets
3299      */
3300     load_balance_map_t *lbm;
3301     index_t lbmi;
3302
3303     lb = load_balance_get(dpo->dpoi_index);
3304     lbmi = lb->lb_map;
3305     load_balance_map_lock(lbmi);
3306     lbm = load_balance_map_get(lbmi);
3307
3308     FIB_TEST(lbm->lbm_buckets[0] == 0,
3309              "LB maps's bucket 0 is %d",
3310              lbm->lbm_buckets[0]);
3311     FIB_TEST(lbm->lbm_buckets[1] == 1,
3312              "LB maps's bucket 1 is %d",
3313              lbm->lbm_buckets[1]);
3314
3315     /*
3316      * withdraw one of the /32 via-entrys.
3317      * that ECMP path will be unresolved and forwarding should continue on the
3318      * other available path. this is an iBGP PIC edge failover.
3319      * Test the forwarding changes without re-fetching the adj from the
3320      * recursive entry. this ensures its the same one that is updated; i.e. an
3321      * inplace-modify.
3322      */
3323     fib_table_entry_path_remove(fib_index,
3324                                 &pfx_1_1_1_1_s_32,
3325                                 FIB_SOURCE_API,
3326                                 DPO_PROTO_IP4,
3327                                 &nh_10_10_10_1,
3328                                 tm->hw[0]->sw_if_index,
3329                                 ~0, // invalid fib index
3330                                 1,
3331                                 FIB_ROUTE_PATH_FLAG_NONE);
3332
3333     /* suspend so the update walk kicks int */
3334     vlib_process_suspend(vlib_get_main(), 1e-5);
3335
3336     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3337     FIB_TEST(!dpo_cmp(dpo, fib_entry_contribute_ip_forwarding(fei)),
3338              "post PIC 200.200.200.200/32 was inplace modified");
3339
3340     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket_i(lb, 0)),
3341              "post PIC adj for 200.200.200.200/32 is recursive"
3342              " via adj for 1.1.1.3");
3343
3344     /*
3345      * the LB maps that was locked above should have been modified to remove
3346      * the path that was down, and thus its bucket points to a path that is
3347      * still up.
3348      */
3349     FIB_TEST(lbm->lbm_buckets[0] == 1,
3350              "LB maps's bucket 0 is %d",
3351              lbm->lbm_buckets[0]);
3352     FIB_TEST(lbm->lbm_buckets[1] == 1,
3353              "LB maps's bucket 1 is %d",
3354              lbm->lbm_buckets[1]);
3355
3356     load_balance_map_unlock(lbmi);
3357
3358     /*
3359      * add it back. again
3360      */
3361     fib_table_entry_path_add(fib_index,
3362                              &pfx_1_1_1_1_s_32,
3363                              FIB_SOURCE_API,
3364                              FIB_ENTRY_FLAG_NONE,
3365                              DPO_PROTO_IP4,
3366                              &nh_10_10_10_1,
3367                              tm->hw[0]->sw_if_index,
3368                              ~0, // invalid fib index
3369                              1,
3370                              NULL,
3371                              FIB_ROUTE_PATH_FLAG_NONE);
3372
3373     /* suspend so the update walk kicks in */
3374     vlib_process_suspend(vlib_get_main(), 1e-5);
3375
3376     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket_i(lb, 0)),
3377              "post PIC recovery adj for 200.200.200.200/32 is recursive "
3378              "via adj for 1.1.1.1");
3379     FIB_TEST(!dpo_cmp(dpo1, load_balance_get_bucket_i(lb, 1)),
3380              "post PIC recovery adj for 200.200.200.200/32 is recursive "
3381              "via adj for 1.1.1.3");
3382
3383     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3384     dpo = fib_entry_contribute_ip_forwarding(fei);
3385     FIB_TEST(lb == load_balance_get(dpo->dpoi_index),
3386              "post PIC 200.200.200.200/32 was inplace modified");
3387
3388     /*
3389      * add a 3rd path. this makes the LB 16 buckets.
3390      */
3391     fib_table_entry_path_add(fib_index,
3392                              &bgp_200_pfx,
3393                              FIB_SOURCE_API,
3394                              FIB_ENTRY_FLAG_NONE,
3395                              DPO_PROTO_IP4,
3396                              &pfx_1_1_1_2_s_32.fp_addr,
3397                              ~0,
3398                              fib_index,
3399                              1,
3400                              NULL,
3401                              FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3402     for (ii = 0; ii < N_P; ii++)
3403     {
3404         fib_table_entry_path_add(fib_index,
3405                                  &bgp_78s[ii],
3406                                  FIB_SOURCE_API,
3407                                  FIB_ENTRY_FLAG_NONE,
3408                                  DPO_PROTO_IP4,
3409                                  &pfx_1_1_1_2_s_32.fp_addr,
3410                                  ~0,
3411                                  fib_index,
3412                                  1,
3413                                  NULL,
3414                                  FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3415     }
3416
3417     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3418     dpo = fib_entry_contribute_ip_forwarding(fei);
3419     FIB_TEST(lb == load_balance_get(dpo->dpoi_index),
3420              "200.200.200.200/32 was inplace modified for 3rd path");
3421     FIB_TEST(16 == lb->lb_n_buckets,
3422              "200.200.200.200/32 was inplace modified for 3rd path to 16 buckets");
3423
3424     lbmi = lb->lb_map;
3425     load_balance_map_lock(lbmi);
3426     lbm = load_balance_map_get(lbmi);
3427
3428     for (ii = 0; ii < 16; ii++)
3429     {
3430         FIB_TEST(lbm->lbm_buckets[ii] == ii,
3431                  "LB Map for 200.200.200.200/32 at %d is %d",
3432                  ii, lbm->lbm_buckets[ii]);
3433     }
3434
3435     /*
3436      * trigger PIC by removing the first via-entry
3437      * the first 6 buckets of the map should map to the next 6
3438      */
3439     fib_table_entry_path_remove(fib_index,
3440                                 &pfx_1_1_1_1_s_32,
3441                                 FIB_SOURCE_API,
3442                                 DPO_PROTO_IP4,
3443                                 &nh_10_10_10_1,
3444                                 tm->hw[0]->sw_if_index,
3445                                 ~0,
3446                                 1,
3447                                 FIB_ROUTE_PATH_FLAG_NONE);
3448     /* suspend so the update walk kicks int */
3449     vlib_process_suspend(vlib_get_main(), 1e-5);
3450
3451     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
3452     dpo = fib_entry_contribute_ip_forwarding(fei);
3453     FIB_TEST(lb == load_balance_get(dpo->dpoi_index),
3454              "200.200.200.200/32 was inplace modified for 3rd path");
3455     FIB_TEST(2 == lb->lb_n_buckets,
3456              "200.200.200.200/32 was inplace modified for 3rd path remove to 2 buckets");
3457
3458     for (ii = 0; ii < 6; ii++)
3459     {
3460         FIB_TEST(lbm->lbm_buckets[ii] == ii+6,
3461                  "LB Map for 200.200.200.200/32 at %d is %d",
3462                  ii, lbm->lbm_buckets[ii]);
3463     }
3464     for (ii = 6; ii < 16; ii++)
3465     {
3466         FIB_TEST(lbm->lbm_buckets[ii] == ii,
3467                  "LB Map for 200.200.200.200/32 at %d is %d",
3468                  ii, lbm->lbm_buckets[ii]);
3469     }
3470     load_balance_map_unlock(lbmi);
3471
3472     /*
3473      * tidy up
3474      */
3475     fib_table_entry_path_add(fib_index,
3476                              &pfx_1_1_1_1_s_32,
3477                              FIB_SOURCE_API,
3478                              FIB_ENTRY_FLAG_NONE,
3479                              DPO_PROTO_IP4,
3480                              &nh_10_10_10_1,
3481                              tm->hw[0]->sw_if_index,
3482                              ~0,
3483                              1,
3484                              NULL,
3485                              FIB_ROUTE_PATH_FLAG_NONE);
3486
3487     for (ii = 0; ii < N_P; ii++)
3488     {
3489         fib_table_entry_delete(fib_index,
3490                                &bgp_78s[ii],
3491                                FIB_SOURCE_API);
3492         FIB_TEST((FIB_NODE_INDEX_INVALID ==
3493                   fib_table_lookup_exact_match(fib_index, &bgp_78s[ii])),
3494                  "%U removed",
3495                  format_fib_prefix, &bgp_78s[ii]);
3496     }
3497     fib_table_entry_path_remove(fib_index,
3498                                 &bgp_200_pfx,
3499                                 FIB_SOURCE_API,
3500                                 DPO_PROTO_IP4,
3501                                 &pfx_1_1_1_2_s_32.fp_addr,
3502                                 ~0,
3503                                 fib_index,
3504                                 1,
3505                                 MPLS_LABEL_INVALID);
3506     fib_table_entry_path_remove(fib_index,
3507                                 &bgp_200_pfx,
3508                                 FIB_SOURCE_API,
3509                                 DPO_PROTO_IP4,
3510                                 &nh_1_1_1_1,
3511                                 ~0,
3512                                 fib_index,
3513                                 1,
3514                                 FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3515     fib_table_entry_path_remove(fib_index,
3516                                 &bgp_200_pfx,
3517                                 FIB_SOURCE_API,
3518                                 DPO_PROTO_IP4,
3519                                 &pfx_1_1_1_3_s_32.fp_addr,
3520                                 ~0,
3521                                 fib_index,
3522                                 1,
3523                                 FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
3524     fib_table_entry_delete(fib_index,
3525                            &pfx_1_1_1_3_s_32,
3526                            FIB_SOURCE_API);
3527     fib_table_entry_delete(fib_index,
3528                            &pfx_1_1_1_0_s_28,
3529                            FIB_SOURCE_API);
3530     /* suspend so the update walk kicks int */
3531     vlib_process_suspend(vlib_get_main(), 1e-5);
3532     FIB_TEST((FIB_NODE_INDEX_INVALID ==
3533               fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_0_s_28)),
3534              "1.1.1.1/28 removed");
3535     FIB_TEST((FIB_NODE_INDEX_INVALID ==
3536               fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_3_s_32)),
3537              "1.1.1.3/32 removed");
3538     FIB_TEST((FIB_NODE_INDEX_INVALID ==
3539               fib_table_lookup_exact_match(fib_index, &bgp_200_pfx)),
3540              "200.200.200.200/32 removed");
3541
3542     /*
3543      * add-remove test. no change.
3544      */
3545     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3546              fib_path_list_db_size());
3547     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3548              fib_path_list_pool_size());
3549     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3550              fib_entry_pool_size());
3551
3552     /*
3553      * A route whose paths are built up iteratively and then removed
3554      * all at once
3555      */
3556     fib_prefix_t pfx_4_4_4_4_s_32 = {
3557         .fp_len = 32,
3558         .fp_proto = FIB_PROTOCOL_IP4,
3559         .fp_addr = {
3560             /* 4.4.4.4/32 */
3561             .ip4.as_u32 = clib_host_to_net_u32(0x04040404),
3562         },
3563     };
3564
3565     fib_table_entry_path_add(fib_index,
3566                              &pfx_4_4_4_4_s_32,
3567                              FIB_SOURCE_API,
3568                              FIB_ENTRY_FLAG_NONE,
3569                              DPO_PROTO_IP4,
3570                              &nh_10_10_10_1,
3571                              tm->hw[0]->sw_if_index,
3572                              ~0,
3573                              1,
3574                              NULL,
3575                              FIB_ROUTE_PATH_FLAG_NONE);
3576     fib_table_entry_path_add(fib_index,
3577                              &pfx_4_4_4_4_s_32,
3578                              FIB_SOURCE_API,
3579                              FIB_ENTRY_FLAG_NONE,
3580                              DPO_PROTO_IP4,
3581                              &nh_10_10_10_2,
3582                              tm->hw[0]->sw_if_index,
3583                              ~0,
3584                              1,
3585                              NULL,
3586                              FIB_ROUTE_PATH_FLAG_NONE);
3587     fib_table_entry_path_add(fib_index,
3588                              &pfx_4_4_4_4_s_32,
3589                              FIB_SOURCE_API,
3590                              FIB_ENTRY_FLAG_NONE,
3591                              DPO_PROTO_IP4,
3592                              &nh_10_10_10_3,
3593                              tm->hw[0]->sw_if_index,
3594                              ~0,
3595                              1,
3596                              NULL,
3597                              FIB_ROUTE_PATH_FLAG_NONE);
3598     FIB_TEST(FIB_NODE_INDEX_INVALID !=
3599              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3600              "4.4.4.4/32 present");
3601
3602     fib_table_entry_delete(fib_index,
3603                            &pfx_4_4_4_4_s_32,
3604                            FIB_SOURCE_API);
3605     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3606              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3607              "4.4.4.4/32 removed");
3608
3609     /*
3610      * add-remove test. no change.
3611      */
3612     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3613              fib_path_list_db_size());
3614     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3615              fib_path_list_pool_size());
3616     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3617              fib_entry_pool_size());
3618
3619     /*
3620      * A route with multiple paths at once
3621      */
3622     fib_route_path_t *r_paths = NULL;
3623
3624     for (ii = 0; ii < 4; ii++)
3625     {
3626         fib_route_path_t r_path = {
3627             .frp_proto = DPO_PROTO_IP4,
3628             .frp_addr = {
3629                 .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02 + ii),
3630             },
3631             .frp_sw_if_index = tm->hw[0]->sw_if_index,
3632             .frp_weight = 1,
3633             .frp_fib_index = ~0,
3634         };
3635         vec_add1(r_paths, r_path);
3636     }
3637
3638     fib_table_entry_update(fib_index,
3639                            &pfx_4_4_4_4_s_32,
3640                            FIB_SOURCE_API,
3641                            FIB_ENTRY_FLAG_NONE,
3642                            r_paths);
3643
3644     fei = fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32);
3645     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "4.4.4.4/32 present");
3646     dpo = fib_entry_contribute_ip_forwarding(fei);
3647
3648     lb = load_balance_get(dpo->dpoi_index);
3649     FIB_TEST((lb->lb_n_buckets == 4), "4.4.4.4/32 lb over %d paths", lb->lb_n_buckets);
3650
3651     fib_table_entry_delete(fib_index,
3652                            &pfx_4_4_4_4_s_32,
3653                            FIB_SOURCE_API);
3654     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3655              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3656              "4.4.4.4/32 removed");
3657     vec_free(r_paths);
3658
3659     /*
3660      * add-remove test. no change.
3661      */
3662     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3663              fib_path_list_db_size());
3664     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3665              fib_path_list_pool_size());
3666     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3667              fib_entry_pool_size());
3668
3669     /*
3670      * A route deag route
3671      */
3672     fib_table_entry_path_add(fib_index,
3673                              &pfx_4_4_4_4_s_32,
3674                              FIB_SOURCE_API,
3675                              FIB_ENTRY_FLAG_NONE,
3676                              DPO_PROTO_IP4,
3677                              &zero_addr,
3678                              ~0,
3679                              fib_index,
3680                              1,
3681                              NULL,
3682                              FIB_ROUTE_PATH_FLAG_NONE);
3683
3684     fei = fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32);
3685     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "4.4.4.4/32 present");
3686
3687     dpo = fib_entry_contribute_ip_forwarding(fei);
3688     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
3689     lookup_dpo_t *lkd = lookup_dpo_get(dpo->dpoi_index);
3690
3691     FIB_TEST((fib_index == lkd->lkd_fib_index),
3692              "4.4.4.4/32 is deag in %d %U",
3693              lkd->lkd_fib_index,
3694              format_dpo_id, dpo, 0);
3695     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
3696              "4.4.4.4/32 is source deag in %d %U",
3697              lkd->lkd_input,
3698              format_dpo_id, dpo, 0);
3699
3700     fib_table_entry_delete(fib_index,
3701                            &pfx_4_4_4_4_s_32,
3702                            FIB_SOURCE_API);
3703     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3704              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3705              "4.4.4.4/32 removed");
3706     vec_free(r_paths);
3707
3708     /*
3709      * A route deag route in a source lookup table
3710      */
3711     fib_table_entry_path_add(fib_index,
3712                              &pfx_4_4_4_4_s_32,
3713                              FIB_SOURCE_API,
3714                              FIB_ENTRY_FLAG_NONE,
3715                              DPO_PROTO_IP4,
3716                              &zero_addr,
3717                              ~0,
3718                              fib_index,
3719                              1,
3720                              NULL,
3721                              FIB_ROUTE_PATH_SOURCE_LOOKUP);
3722
3723     fei = fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32);
3724     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "4.4.4.4/32 present");
3725
3726     dpo = fib_entry_contribute_ip_forwarding(fei);
3727     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
3728     lkd = lookup_dpo_get(dpo->dpoi_index);
3729
3730     FIB_TEST((fib_index == lkd->lkd_fib_index),
3731              "4.4.4.4/32 is deag in %d %U",
3732              lkd->lkd_fib_index,
3733              format_dpo_id, dpo, 0);
3734     FIB_TEST((LOOKUP_INPUT_SRC_ADDR == lkd->lkd_input),
3735              "4.4.4.4/32 is source deag in %d %U",
3736              lkd->lkd_input,
3737              format_dpo_id, dpo, 0);
3738
3739     fib_table_entry_delete(fib_index,
3740                            &pfx_4_4_4_4_s_32,
3741                            FIB_SOURCE_API);
3742     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3743              fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
3744              "4.4.4.4/32 removed");
3745     vec_free(r_paths);
3746
3747     /*
3748      * add-remove test. no change.
3749      */
3750     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3751              fib_path_list_db_size());
3752     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3753              fib_path_list_pool_size());
3754     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
3755              fib_entry_pool_size());
3756
3757     /*
3758      * Duplicate paths:
3759      *  add a recursive with duplicate paths. Expect the duplicate to be ignored.
3760      */
3761     fib_prefix_t pfx_34_1_1_1_s_32 = {
3762         .fp_len = 32,
3763         .fp_proto = FIB_PROTOCOL_IP4,
3764         .fp_addr = {
3765             .ip4.as_u32 = clib_host_to_net_u32(0x22010101),
3766         },
3767     };
3768     fib_prefix_t pfx_34_34_1_1_s_32 = {
3769         .fp_len = 32,
3770         .fp_proto = FIB_PROTOCOL_IP4,
3771         .fp_addr = {
3772             .ip4.as_u32 = clib_host_to_net_u32(0x22220101),
3773         },
3774     };
3775     fei = fib_table_entry_path_add(fib_index,
3776                                    &pfx_34_34_1_1_s_32,
3777                                    FIB_SOURCE_API,
3778                                    FIB_ENTRY_FLAG_NONE,
3779                                    DPO_PROTO_IP4,
3780                                    &nh_10_10_10_1,
3781                                    tm->hw[0]->sw_if_index,
3782                                    0,
3783                                    1,
3784                                    NULL,
3785                                    FIB_ROUTE_PATH_FLAG_NONE);
3786     fei = fib_table_entry_path_add(fib_index,
3787                                    &pfx_34_1_1_1_s_32,
3788                                    FIB_SOURCE_API,
3789                                    FIB_ENTRY_FLAG_NONE,
3790                                    DPO_PROTO_IP4,
3791                                    &pfx_34_34_1_1_s_32.fp_addr,
3792                                    ~0,
3793                                    fib_index,
3794                                    1,
3795                                    NULL,
3796                                    FIB_ROUTE_PATH_FLAG_NONE);
3797     fei = fib_table_entry_path_add(fib_index,
3798                                    &pfx_34_1_1_1_s_32,
3799                                    FIB_SOURCE_API,
3800                                    FIB_ENTRY_FLAG_NONE,
3801                                    DPO_PROTO_IP4,
3802                                    &pfx_34_34_1_1_s_32.fp_addr,
3803                                    ~0,
3804                                    fib_index,
3805                                    1,
3806                                    NULL,
3807                                    FIB_ROUTE_PATH_FLAG_NONE);
3808     FIB_TEST_REC_FORW(&pfx_34_1_1_1_s_32, &pfx_34_34_1_1_s_32, 0);
3809     fib_table_entry_delete_index(fei, FIB_SOURCE_API);
3810     fib_table_entry_delete(fib_index,
3811                            &pfx_34_34_1_1_s_32,
3812                            FIB_SOURCE_API);
3813
3814     /*
3815      * CLEANUP
3816      *   remove: 1.1.1.2/32, 1.1.2.0/24 and 1.1.1.1/32
3817      *           all of which are via 10.10.10.1, Itf1
3818      */
3819     fib_table_entry_path_remove(fib_index,
3820                                 &pfx_1_1_1_2_s_32,
3821                                 FIB_SOURCE_API,
3822                                 DPO_PROTO_IP4,
3823                                 &nh_10_10_10_1,
3824                                 tm->hw[0]->sw_if_index,
3825                                 ~0,
3826                                 1,
3827                                 FIB_ROUTE_PATH_FLAG_NONE);
3828     fib_table_entry_path_remove(fib_index,
3829                                 &pfx_1_1_1_1_s_32,
3830                                 FIB_SOURCE_API,
3831                                 DPO_PROTO_IP4,
3832                                 &nh_10_10_10_1,
3833                                 tm->hw[0]->sw_if_index,
3834                                 ~0,
3835                                 1,
3836                                 FIB_ROUTE_PATH_FLAG_NONE);
3837     fib_table_entry_path_remove(fib_index,
3838                                 &pfx_1_1_2_0_s_24,
3839                                 FIB_SOURCE_API,
3840                                 DPO_PROTO_IP4,
3841                                 &nh_10_10_10_1,
3842                                 tm->hw[0]->sw_if_index,
3843                                 ~0,
3844                                 1,
3845                                 FIB_ROUTE_PATH_FLAG_NONE);
3846
3847     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3848              fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_1_s_32),
3849              "1.1.1.1/32 removed");
3850     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3851              fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_2_s_32),
3852              "1.1.1.2/32 removed");
3853     FIB_TEST(FIB_NODE_INDEX_INVALID ==
3854              fib_table_lookup_exact_match(fib_index, &pfx_1_1_2_0_s_24),
3855              "1.1.2.0/24 removed");
3856
3857     /*
3858      * -3 entries and -1 shared path-list
3859      */
3860     FIB_TEST((0  == fib_path_list_db_size()),   "path list DB population:%d",
3861              fib_path_list_db_size());
3862     FIB_TEST((PNBR+4 == fib_path_list_pool_size()), "path list pool size is %d",
3863              fib_path_list_pool_size());
3864     FIB_TEST((ENBR+4 == fib_entry_pool_size()), "entry pool size is %d",
3865              fib_entry_pool_size());
3866
3867     /*
3868      * An attached-host route. Expect to link to the incomplete adj
3869      */
3870     fib_prefix_t pfx_4_1_1_1_s_32 = {
3871         .fp_len = 32,
3872         .fp_proto = FIB_PROTOCOL_IP4,
3873         .fp_addr = {
3874             /* 4.1.1.1/32 */
3875             .ip4.as_u32 = clib_host_to_net_u32(0x04010101),
3876         },
3877     };
3878     fib_table_entry_path_add(fib_index,
3879                              &pfx_4_1_1_1_s_32,
3880                              FIB_SOURCE_API,
3881                              FIB_ENTRY_FLAG_NONE,
3882                              DPO_PROTO_IP4,
3883                              &zero_addr,
3884                              tm->hw[0]->sw_if_index,
3885                              fib_index,
3886                              1,
3887                              NULL,
3888                              FIB_ROUTE_PATH_FLAG_NONE);
3889
3890     fei = fib_table_lookup_exact_match(fib_index, &pfx_4_1_1_1_s_32);
3891     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "4.1.1.1/32 present");
3892     ai = fib_entry_get_adj(fei);
3893
3894     ai2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
3895                               VNET_LINK_IP4,
3896                               &pfx_4_1_1_1_s_32.fp_addr,
3897                               tm->hw[0]->sw_if_index);
3898     FIB_TEST((ai == ai2), "Attached-host link to incomplete ADJ");
3899     adj_unlock(ai2);
3900
3901     /*
3902      * +1 entry and +1 shared path-list
3903      */
3904     FIB_TEST((1  == fib_path_list_db_size()),   "path list DB population:%d",
3905              fib_path_list_db_size());
3906     FIB_TEST((PNBR+5 == fib_path_list_pool_size()), "path list pool size is %d",
3907              fib_path_list_pool_size());
3908     FIB_TEST((ENBR+5 == fib_entry_pool_size()), "entry pool size is %d",
3909              fib_entry_pool_size());
3910
3911     fib_table_entry_delete(fib_index,
3912                            &pfx_4_1_1_1_s_32,
3913                            FIB_SOURCE_API);
3914
3915     FIB_TEST((0  == fib_path_list_db_size()),   "path list DB population:%d",
3916              fib_path_list_db_size());
3917     FIB_TEST((PNBR+4 == fib_path_list_pool_size()), "path list pool size is %d",
3918              fib_path_list_pool_size());
3919     FIB_TEST((ENBR+4 == fib_entry_pool_size()), "entry pool size is %d",
3920              fib_entry_pool_size());
3921
3922     /*
3923      * add a v6 prefix via v4 next-hops
3924      */
3925     fib_prefix_t pfx_2001_s_64 = {
3926         .fp_len = 64,
3927         .fp_proto = FIB_PROTOCOL_IP6,
3928         .fp_addr = {
3929             .ip6.as_u64[0] = clib_host_to_net_u64(0x2001000000000000),
3930         },
3931     };
3932     fei = fib_table_entry_path_add(0, //default v6 table
3933                                    &pfx_2001_s_64,
3934                                    FIB_SOURCE_API,
3935                                    FIB_ENTRY_FLAG_NONE,
3936                                    DPO_PROTO_IP4,
3937                                    &nh_10_10_10_1,
3938                                    tm->hw[0]->sw_if_index,
3939                                    fib_index,
3940                                    1,
3941                                    NULL,
3942                                    FIB_ROUTE_PATH_FLAG_NONE);
3943
3944     fei = fib_table_lookup_exact_match(0, &pfx_2001_s_64);
3945     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "2001::/64 present");
3946     ai = fib_entry_get_adj(fei);
3947     adj = adj_get(ai);
3948     FIB_TEST((adj->lookup_next_index == IP_LOOKUP_NEXT_ARP),
3949              "2001::/64 via ARP-adj");
3950     FIB_TEST((adj->ia_link == VNET_LINK_IP6),
3951              "2001::/64 is link type v6");
3952     FIB_TEST((adj->ia_nh_proto == FIB_PROTOCOL_IP4),
3953              "2001::/64 ADJ-adj is NH proto v4");
3954     fib_table_entry_delete(0, &pfx_2001_s_64, FIB_SOURCE_API);
3955
3956     /*
3957      * add a uRPF exempt prefix:
3958      *  test:
3959      *   - it's forwarding is drop
3960      *   - it's uRPF list is not empty
3961      *   - the uRPF list for the default route (it's cover) is empty
3962      */
3963     fei = fib_table_entry_special_add(fib_index,
3964                                       &pfx_4_1_1_1_s_32,
3965                                       FIB_SOURCE_URPF_EXEMPT,
3966                                       FIB_ENTRY_FLAG_DROP);
3967     dpo = fib_entry_contribute_ip_forwarding(fei);
3968     FIB_TEST(load_balance_is_drop(dpo),
3969              "uRPF exempt 4.1.1.1/32 DROP");
3970     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 1, 0),
3971              "uRPF list for exempt prefix has itf index 0");
3972     fei = fib_table_lookup_exact_match(fib_index, &pfx_0_0_0_0_s_0);
3973     FIB_TEST(!fib_test_urpf_is_equal(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, 0),
3974              "uRPF list for 0.0.0.0/0 empty");
3975
3976     fib_table_entry_delete(fib_index, &pfx_4_1_1_1_s_32, FIB_SOURCE_URPF_EXEMPT);
3977
3978     /*
3979      * An adj-fib that fails the refinement criteria - no connected cover
3980      */
3981     fib_prefix_t pfx_12_10_10_2_s_32 = {
3982         .fp_len = 32,
3983         .fp_proto = FIB_PROTOCOL_IP4,
3984         .fp_addr = {
3985             /* 12.10.10.2 */
3986             .ip4.as_u32 = clib_host_to_net_u32(0x0c0a0a02),
3987         },
3988     };
3989
3990     fib_table_entry_path_add(fib_index,
3991                              &pfx_12_10_10_2_s_32,
3992                              FIB_SOURCE_ADJ,
3993                              FIB_ENTRY_FLAG_ATTACHED,
3994                              DPO_PROTO_IP4,
3995                              &pfx_12_10_10_2_s_32.fp_addr,
3996                              tm->hw[0]->sw_if_index,
3997                              ~0, // invalid fib index
3998                              1,
3999                              NULL,
4000                              FIB_ROUTE_PATH_FLAG_NONE);
4001
4002     fei = fib_table_lookup_exact_match(fib_index, &pfx_12_10_10_2_s_32);
4003     dpo = fib_entry_contribute_ip_forwarding(fei);
4004     FIB_TEST(dpo_is_drop(dpo),
4005              "no connected cover adj-fib fails refinement: %U",
4006              format_dpo_id, dpo, 0);
4007
4008     fib_table_entry_delete(fib_index,
4009                            &pfx_12_10_10_2_s_32,
4010                            FIB_SOURCE_ADJ);
4011
4012     /*
4013      * An adj-fib that fails the refinement criteria - cover is connected
4014      * but on a different interface
4015      */
4016     fib_prefix_t pfx_10_10_10_127_s_32 = {
4017         .fp_len = 32,
4018         .fp_proto = FIB_PROTOCOL_IP4,
4019         .fp_addr = {
4020             /* 10.10.10.127 */
4021             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a7f),
4022         },
4023     };
4024
4025     fib_table_entry_path_add(fib_index,
4026                              &pfx_10_10_10_127_s_32,
4027                              FIB_SOURCE_ADJ,
4028                              FIB_ENTRY_FLAG_ATTACHED,
4029                              DPO_PROTO_IP4,
4030                              &pfx_10_10_10_127_s_32.fp_addr,
4031                              tm->hw[1]->sw_if_index,
4032                              ~0, // invalid fib index
4033                              1,
4034                              NULL,
4035                              FIB_ROUTE_PATH_FLAG_NONE);
4036
4037     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_127_s_32);
4038     dpo = fib_entry_contribute_ip_forwarding(fei);
4039     FIB_TEST(dpo_is_drop(dpo),
4040              "wrong interface adj-fib fails refinement");
4041
4042     fib_table_entry_delete(fib_index,
4043                            &pfx_10_10_10_127_s_32,
4044                            FIB_SOURCE_ADJ);
4045
4046     /*
4047      * add a second path to an adj-fib
4048      * this is a sumiluation of another ARP entry created
4049      * on an interface on which the connected prefix does not exist.
4050      * The second path fails refinement. Expect to forward through the
4051      * first.
4052      */
4053     fib_prefix_t pfx_10_10_10_3_s_32 = {
4054         .fp_len = 32,
4055         .fp_proto = FIB_PROTOCOL_IP4,
4056         .fp_addr = {
4057             /* 10.10.10.3 */
4058             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a03),
4059         },
4060     };
4061
4062     ai_03 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
4063                                 VNET_LINK_IP4,
4064                                 &nh_10_10_10_3,
4065                                 tm->hw[0]->sw_if_index);
4066
4067     fib_test_lb_bucket_t ip_o_10_10_10_3 = {
4068         .type = FT_LB_ADJ,
4069         .adj = {
4070             .adj = ai_03,
4071         },
4072     };
4073     fei = fib_table_entry_path_add(fib_index,
4074                                    &pfx_10_10_10_3_s_32,
4075                                    FIB_SOURCE_ADJ,
4076                                    FIB_ENTRY_FLAG_NONE,
4077                                    DPO_PROTO_IP4,
4078                                    &nh_10_10_10_3,
4079                                    tm->hw[0]->sw_if_index,
4080                                    fib_index,
4081                                    1,
4082                                    NULL,
4083                                    FIB_ROUTE_PATH_FLAG_NONE);
4084     fei = fib_table_entry_path_add(fib_index,
4085                                    &pfx_10_10_10_3_s_32,
4086                                    FIB_SOURCE_ADJ,
4087                                    FIB_ENTRY_FLAG_NONE,
4088                                    DPO_PROTO_IP4,
4089                                    &nh_12_12_12_12,
4090                                    tm->hw[1]->sw_if_index,
4091                                    fib_index,
4092                                    1,
4093                                    NULL,
4094                                    FIB_ROUTE_PATH_FLAG_NONE);
4095     FIB_TEST(!fib_test_validate_entry(fei,
4096                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4097                                       1,
4098                                       &ip_o_10_10_10_3),
4099              "10.10.10.3 via 10.10.10.3/Eth0 only");
4100
4101     /*
4102      * remove the path that refines the cover, should go unresolved
4103      */
4104     fib_table_entry_path_remove(fib_index,
4105                                 &pfx_10_10_10_3_s_32,
4106                                 FIB_SOURCE_ADJ,
4107                                 DPO_PROTO_IP4,
4108                                 &nh_10_10_10_3,
4109                                 tm->hw[0]->sw_if_index,
4110                                 fib_index,
4111                                 1,
4112                                 FIB_ROUTE_PATH_FLAG_NONE);
4113     dpo = fib_entry_contribute_ip_forwarding(fei);
4114     FIB_TEST(dpo_is_drop(dpo),
4115              "wrong interface adj-fib fails refinement");
4116
4117     /*
4118      * add back the path that refines the cover
4119      */
4120     fei = fib_table_entry_path_add(fib_index,
4121                                    &pfx_10_10_10_3_s_32,
4122                                    FIB_SOURCE_ADJ,
4123                                    FIB_ENTRY_FLAG_NONE,
4124                                    DPO_PROTO_IP4,
4125                                    &nh_10_10_10_3,
4126                                    tm->hw[0]->sw_if_index,
4127                                    fib_index,
4128                                    1,
4129                                    NULL,
4130                                    FIB_ROUTE_PATH_FLAG_NONE);
4131     FIB_TEST(!fib_test_validate_entry(fei,
4132                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4133                                       1,
4134                                       &ip_o_10_10_10_3),
4135              "10.10.10.3 via 10.10.10.3/Eth0 only");
4136
4137     /*
4138      * remove the path that does not refine the cover
4139      */
4140     fib_table_entry_path_remove(fib_index,
4141                                 &pfx_10_10_10_3_s_32,
4142                                 FIB_SOURCE_ADJ,
4143                                 DPO_PROTO_IP4,
4144                                 &nh_12_12_12_12,
4145                                 tm->hw[1]->sw_if_index,
4146                                 fib_index,
4147                                 1,
4148                                 FIB_ROUTE_PATH_FLAG_NONE);
4149     FIB_TEST(!fib_test_validate_entry(fei,
4150                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4151                                       1,
4152                                       &ip_o_10_10_10_3),
4153              "10.10.10.3 via 10.10.10.3/Eth0 only");
4154
4155     /*
4156      * remove the path that does refine, it's the last path, so
4157      * the entry should be gone
4158      */
4159     fib_table_entry_path_remove(fib_index,
4160                                 &pfx_10_10_10_3_s_32,
4161                                 FIB_SOURCE_ADJ,
4162                                 DPO_PROTO_IP4,
4163                                 &nh_10_10_10_3,
4164                                 tm->hw[0]->sw_if_index,
4165                                 fib_index,
4166                                 1,
4167                                 FIB_ROUTE_PATH_FLAG_NONE);
4168     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3_s_32);
4169     FIB_TEST((fei == FIB_NODE_INDEX_INVALID), "10.10.10.3 gone");
4170
4171     adj_unlock(ai_03);
4172
4173     /*
4174      * change the table's flow-hash config - expect the update to propagete to
4175      * the entries' load-balance objects
4176      */
4177     flow_hash_config_t old_hash_config, new_hash_config;
4178
4179     old_hash_config = fib_table_get_flow_hash_config(fib_index,
4180                                                      FIB_PROTOCOL_IP4);
4181     new_hash_config = (IP_FLOW_HASH_SRC_ADDR |
4182                        IP_FLOW_HASH_DST_ADDR);
4183
4184     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
4185     dpo = fib_entry_contribute_ip_forwarding(fei);
4186     lb = load_balance_get(dpo->dpoi_index);
4187     FIB_TEST((lb->lb_hash_config == old_hash_config),
4188              "Table and LB hash config match: %U",
4189              format_ip_flow_hash_config, lb->lb_hash_config);
4190
4191     fib_table_set_flow_hash_config(fib_index, FIB_PROTOCOL_IP4, new_hash_config);
4192
4193     FIB_TEST((lb->lb_hash_config == new_hash_config),
4194              "Table and LB newhash config match: %U",
4195              format_ip_flow_hash_config, lb->lb_hash_config);
4196
4197     /*
4198      * A route via DVR DPO
4199      */
4200     fei = fib_table_entry_path_add(fib_index,
4201                                    &pfx_10_10_10_3_s_32,
4202                                    FIB_SOURCE_API,
4203                                    FIB_ENTRY_FLAG_NONE,
4204                                    DPO_PROTO_IP4,
4205                                    &zero_addr,
4206                                    tm->hw[0]->sw_if_index,
4207                                    ~0,
4208                                    1,
4209                                    NULL,
4210                                    FIB_ROUTE_PATH_DVR);
4211     dpo_id_t dvr_dpo = DPO_INVALID;
4212     dvr_dpo_add_or_lock(tm->hw[0]->sw_if_index, DPO_PROTO_IP4, &dvr_dpo);
4213     fib_test_lb_bucket_t ip_o_l2 = {
4214         .type = FT_LB_L2,
4215         .adj = {
4216             .adj = dvr_dpo.dpoi_index,
4217         },
4218     };
4219
4220     FIB_TEST(!fib_test_validate_entry(fei,
4221                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4222                                       1,
4223                                       &ip_o_l2),
4224              "10.10.10.3 via L2 on Eth0");
4225     fib_table_entry_path_remove(fib_index,
4226                                 &pfx_10_10_10_3_s_32,
4227                                 FIB_SOURCE_API,
4228                                 DPO_PROTO_IP4,
4229                                 &zero_addr,
4230                                 tm->hw[0]->sw_if_index,
4231                                 fib_index,
4232                                 1,
4233                                 FIB_ROUTE_PATH_DVR);
4234     dpo_reset(&dvr_dpo);
4235
4236     /*
4237      * add the default route via a next-hop that will form a loop
4238      */
4239     fib_prefix_t pfx_conn = {
4240         .fp_len = 24,
4241         .fp_proto = FIB_PROTOCOL_IP4,
4242         .fp_addr = {
4243             /* 30.30.30.30 */
4244             .ip4.as_u32 = clib_host_to_net_u32(0x1e1e1e1e),
4245         },
4246     };
4247
4248     dfrt = fib_table_entry_path_add(fib_index,
4249                                     &pfx_0_0_0_0_s_0,
4250                                     FIB_SOURCE_API,
4251                                     FIB_ENTRY_FLAG_NONE,
4252                                     DPO_PROTO_IP4,
4253                                     &pfx_conn.fp_addr,
4254                                     ~0,
4255                                     fib_index,
4256                                     1,
4257                                     NULL,
4258                                     FIB_ROUTE_PATH_FLAG_NONE);
4259     /*
4260      * the default route is a drop, since it's looped
4261      */
4262     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(dfrt)),
4263              "Default route is DROP");
4264
4265     /*
4266      * add a connected cover for the next-hop, this breaks the recursion loop
4267      * for the default route
4268      */
4269     fib_table_entry_path_add(fib_index,
4270                              &pfx_conn,
4271                              FIB_SOURCE_API,
4272                              (FIB_ENTRY_FLAG_CONNECTED |
4273                               FIB_ENTRY_FLAG_ATTACHED),
4274                              DPO_PROTO_IP4,
4275                              NULL,
4276                              tm->hw[0]->sw_if_index,
4277                              ~0,
4278                              1,
4279                              NULL,
4280                              FIB_ROUTE_PATH_FLAG_NONE);
4281     pfx_conn.fp_len = 32;
4282     fei = fib_table_lookup_exact_match(fib_index, &pfx_conn);
4283
4284     u32 ai_30 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
4285                                     VNET_LINK_IP4,
4286                                     &pfx_conn.fp_addr,
4287                                     tm->hw[0]->sw_if_index);
4288
4289     fib_test_lb_bucket_t ip_o_30_30_30_30 = {
4290         .type = FT_LB_ADJ,
4291         .adj = {
4292             .adj = ai_30,
4293         },
4294     };
4295     FIB_TEST(!fib_test_validate_entry(fei,
4296                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
4297                                       1,
4298                                       &ip_o_30_30_30_30),
4299              "30.30.30.30 via adj");
4300     FIB_TEST_REC_FORW(&pfx_0_0_0_0_s_0, &pfx_conn, 0);
4301
4302     pfx_conn.fp_len = 24;
4303     fib_table_entry_delete(fib_index,
4304                            &pfx_conn,
4305                            FIB_SOURCE_API);
4306     fib_table_entry_delete(fib_index,
4307                            &pfx_0_0_0_0_s_0,
4308                            FIB_SOURCE_API);
4309     adj_unlock(ai_30);
4310
4311     /*
4312      * CLEANUP
4313      *    remove adj-fibs:
4314      */
4315     fib_table_entry_delete(fib_index,
4316                            &pfx_10_10_10_1_s_32,
4317                            FIB_SOURCE_ADJ);
4318     fib_table_entry_delete(fib_index,
4319                            &pfx_10_10_10_2_s_32,
4320                            FIB_SOURCE_ADJ);
4321     FIB_TEST(FIB_NODE_INDEX_INVALID ==
4322              fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32),
4323              "10.10.10.1/32 adj-fib removed");
4324     FIB_TEST(FIB_NODE_INDEX_INVALID ==
4325              fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_2_s_32),
4326              "10.10.10.2/32 adj-fib removed");
4327
4328     /*
4329      * -2 entries and -2 non-shared path-list
4330      */
4331     FIB_TEST((0  == fib_path_list_db_size()),   "path list DB population:%d",
4332              fib_path_list_db_size());
4333     FIB_TEST((PNBR+2 == fib_path_list_pool_size()), "path list pool size is %d",
4334              fib_path_list_pool_size());
4335     FIB_TEST((ENBR+2 == fib_entry_pool_size()), "entry pool size is %d",
4336              fib_entry_pool_size());
4337
4338     /*
4339      * unlock the adjacencies for which this test provided a rewrite.
4340      * These are the last locks on these adjs. they should thus go away.
4341      */
4342     adj_unlock(ai_02);
4343     adj_unlock(ai_01);
4344     adj_unlock(ai_12_12_12_12);
4345
4346     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
4347              adj_nbr_db_size());
4348
4349     /*
4350      * CLEANUP
4351      *   remove the interface prefixes
4352      */
4353     local_pfx.fp_len = 32;
4354     fib_table_entry_special_remove(fib_index, &local_pfx,
4355                                    FIB_SOURCE_INTERFACE);
4356     fei = fib_table_lookup(fib_index, &local_pfx);
4357
4358     FIB_TEST(FIB_NODE_INDEX_INVALID ==
4359              fib_table_lookup_exact_match(fib_index, &local_pfx),
4360              "10.10.10.10/32 adj-fib removed");
4361
4362     local_pfx.fp_len = 24;
4363     fib_table_entry_delete(fib_index, &local_pfx,
4364                            FIB_SOURCE_INTERFACE);
4365
4366     FIB_TEST(FIB_NODE_INDEX_INVALID ==
4367              fib_table_lookup_exact_match(fib_index, &local_pfx),
4368              "10.10.10.10/24 adj-fib removed");
4369
4370     /*
4371      * -2 entries and -2 non-shared path-list
4372      */
4373     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
4374              fib_path_list_db_size());
4375     FIB_TEST((PNBR == fib_path_list_pool_size()), "path list pool size is %d",
4376              fib_path_list_pool_size());
4377     FIB_TEST((ENBR == fib_entry_pool_size()), "entry pool size is %d",
4378              fib_entry_pool_size());
4379
4380     /*
4381      * Last but not least, remove the VRF
4382      */
4383     FIB_TEST((0 == fib_table_get_num_entries(fib_index,
4384                                              FIB_PROTOCOL_IP4,
4385                                              FIB_SOURCE_API)),
4386              "NO API Source'd prefixes");
4387     FIB_TEST((0 == fib_table_get_num_entries(fib_index,
4388                                              FIB_PROTOCOL_IP4,
4389                                              FIB_SOURCE_RR)),
4390              "NO RR Source'd prefixes");
4391     FIB_TEST((0 == fib_table_get_num_entries(fib_index,
4392                                              FIB_PROTOCOL_IP4,
4393                                              FIB_SOURCE_INTERFACE)),
4394              "NO INterface Source'd prefixes");
4395
4396     fib_table_unlock(fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_API);
4397
4398     FIB_TEST((0  == fib_path_list_db_size()), "path list DB population:%d",
4399              fib_path_list_db_size());
4400     FIB_TEST((PNBR-5 == fib_path_list_pool_size()), "path list pool size is %d",
4401              fib_path_list_pool_size());
4402     FIB_TEST((ENBR-5 == fib_entry_pool_size()), "entry pool size is %d",
4403              fib_entry_pool_size());
4404     FIB_TEST((ENBR-5 == pool_elts(fib_urpf_list_pool)), "uRPF pool size is %d",
4405              pool_elts(fib_urpf_list_pool));
4406     FIB_TEST((0 == pool_elts(load_balance_map_pool)), "LB-map pool size is %d",
4407              pool_elts(load_balance_map_pool));
4408     FIB_TEST((lb_count == pool_elts(load_balance_pool)), "LB pool size is %d",
4409              pool_elts(load_balance_pool));
4410     FIB_TEST((0 == pool_elts(dvr_dpo_pool)), "L2 DPO pool size is %d",
4411              pool_elts(dvr_dpo_pool));
4412
4413     return (res);
4414 }
4415
4416 static int
4417 fib_test_v6 (void)
4418 {
4419     /*
4420      * In the default table check for the presence and correct forwarding
4421      * of the special entries
4422      */
4423     fib_node_index_t dfrt, fei, ai, locked_ai, ai_01, ai_02;
4424     const dpo_id_t *dpo, *dpo_drop;
4425     const ip_adjacency_t *adj;
4426     const receive_dpo_t *rd;
4427     test_main_t *tm;
4428     u32 fib_index;
4429     int ii, res;
4430
4431     res = 0;
4432     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
4433              adj_nbr_db_size());
4434
4435     /* via 2001:0:0:1::2 */
4436     ip46_address_t nh_2001_2 = {
4437         .ip6 = {
4438             .as_u64 = {
4439                 [0] = clib_host_to_net_u64(0x2001000000000001),
4440                 [1] = clib_host_to_net_u64(0x0000000000000002),
4441             },
4442         },
4443     };
4444
4445     tm = &test_main;
4446
4447     dpo_drop = drop_dpo_get(DPO_PROTO_IP6);
4448
4449     /* Find or create FIB table 11 */
4450     fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP6, 11,
4451                                                   FIB_SOURCE_API);
4452
4453     for (ii = 0; ii < 4; ii++)
4454     {
4455         ip6_main.fib_index_by_sw_if_index[tm->hw[ii]->sw_if_index] = fib_index;
4456     }
4457
4458     fib_prefix_t pfx_0_0 = {
4459         .fp_len = 0,
4460         .fp_proto = FIB_PROTOCOL_IP6,
4461         .fp_addr = {
4462             .ip6 = {
4463                 {0, 0},
4464             },
4465         },
4466     };
4467
4468     dfrt = fib_table_lookup(fib_index, &pfx_0_0);
4469     FIB_TEST((FIB_NODE_INDEX_INVALID != dfrt), "default route present");
4470     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(dfrt)),
4471              "Default route is DROP");
4472
4473     dpo = fib_entry_contribute_ip_forwarding(dfrt);
4474     FIB_TEST((dpo->dpoi_index == ip6_fib_table_fwding_lookup(
4475                   1,
4476                   &pfx_0_0.fp_addr.ip6)),
4477              "default-route; fwd and non-fwd tables match");
4478
4479     // FIXME - check specials.
4480
4481     /*
4482      * At this stage there is one v4 FIB with 5 routes and two v6 FIBs
4483      * each with 2 entries and a v6 mfib with 4 path-lists and v4 mfib with 2.
4484      * All entries are special so no path-list sharing.
4485      */
4486 #define ENPS (5+4)
4487     u32 PNPS = (5+4+4+2);
4488     /*
4489      * if the IGMP plugin is loaded this adds two more entries to the v4 MFIB
4490      */
4491     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
4492     FIB_TEST((PNPS == fib_path_list_pool_size()), "path list pool size is %d",
4493              fib_path_list_pool_size());
4494     FIB_TEST((ENPS == fib_entry_pool_size()), "entry pool size is %d",
4495              fib_entry_pool_size());
4496
4497     /*
4498      * add interface routes.
4499      *  validate presence of /64 attached and /128 recieve.
4500      *  test for the presence of the receive address in the glean and local adj
4501      *
4502      * receive on 2001:0:0:1::1/128
4503      */
4504     fib_prefix_t local_pfx = {
4505         .fp_len = 64,
4506         .fp_proto = FIB_PROTOCOL_IP6,
4507         .fp_addr = {
4508             .ip6 = {
4509                 .as_u64 = {
4510                     [0] = clib_host_to_net_u64(0x2001000000000001),
4511                     [1] = clib_host_to_net_u64(0x0000000000000001),
4512                 },
4513             },
4514         }
4515     };
4516
4517     fib_table_entry_update_one_path(fib_index, &local_pfx,
4518                                     FIB_SOURCE_INTERFACE,
4519                                     (FIB_ENTRY_FLAG_CONNECTED |
4520                                      FIB_ENTRY_FLAG_ATTACHED),
4521                                     DPO_PROTO_IP6,
4522                                     NULL,
4523                                     tm->hw[0]->sw_if_index,
4524                                     ~0,
4525                                     1,
4526                                     NULL,
4527                                     FIB_ROUTE_PATH_FLAG_NONE);
4528     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
4529
4530     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached interface route present");
4531
4532     ai = fib_entry_get_adj(fei);
4533     FIB_TEST((FIB_NODE_INDEX_INVALID != ai), "attached interface route adj present");
4534     adj = adj_get(ai);
4535     FIB_TEST((IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index),
4536              "attached interface adj is glean");
4537     dpo = fib_entry_contribute_ip_forwarding(fei);
4538     FIB_TEST((dpo->dpoi_index == ip6_fib_table_fwding_lookup(
4539                   1,
4540                   &local_pfx.fp_addr.ip6)),
4541              "attached-route; fwd and non-fwd tables match");
4542
4543     local_pfx.fp_len = 128;
4544     fib_table_entry_update_one_path(fib_index, &local_pfx,
4545                                     FIB_SOURCE_INTERFACE,
4546                                     (FIB_ENTRY_FLAG_CONNECTED |
4547                                      FIB_ENTRY_FLAG_LOCAL),
4548                                     DPO_PROTO_IP6,
4549                                     NULL,
4550                                     tm->hw[0]->sw_if_index,
4551                                     ~0, // invalid fib index
4552                                     1,
4553                                     NULL,
4554                                     FIB_ROUTE_PATH_FLAG_NONE);
4555     fei = fib_table_lookup(fib_index, &local_pfx);
4556
4557     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local interface route present");
4558
4559     dpo = fib_entry_contribute_ip_forwarding(fei);
4560     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
4561     FIB_TEST((DPO_RECEIVE == dpo->dpoi_type),
4562              "local interface adj is local");
4563     rd = receive_dpo_get(dpo->dpoi_index);
4564
4565     FIB_TEST((0 == ip46_address_cmp(&local_pfx.fp_addr,
4566                                     &rd->rd_addr)),
4567              "local interface adj is receive ok");
4568
4569     dpo = fib_entry_contribute_ip_forwarding(fei);
4570     FIB_TEST((dpo->dpoi_index == ip6_fib_table_fwding_lookup(
4571                   1,
4572                   &local_pfx.fp_addr.ip6)),
4573              "local-route; fwd and non-fwd tables match");
4574     FIB_TEST((0 == ip46_address_cmp(&local_pfx.fp_addr,
4575                                     &adj->sub_type.glean.rx_pfx.fp_addr)),
4576              "attached interface adj is receive ok");
4577
4578     /*
4579      * +2 entries. +2 unshared path-lists
4580      */
4581     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
4582     FIB_TEST((PNPS+2 == fib_path_list_pool_size()), "path list pool size is%d",
4583              fib_path_list_pool_size());
4584     FIB_TEST((ENPS+2 == fib_entry_pool_size()), "entry pool size is %d",
4585              fib_entry_pool_size());
4586
4587     /*
4588      * Modify the default route to be via an adj not yet known.
4589      * this sources the defalut route with the API source, which is
4590      * a higher preference to the DEFAULT_ROUTE source
4591      */
4592     fib_table_entry_path_add(fib_index, &pfx_0_0,
4593                              FIB_SOURCE_API,
4594                              FIB_ENTRY_FLAG_NONE,
4595                              DPO_PROTO_IP6,
4596                              &nh_2001_2,
4597                              tm->hw[0]->sw_if_index,
4598                              ~0,
4599                              1,
4600                              NULL,
4601                              FIB_ROUTE_PATH_FLAG_NONE);
4602     fei = fib_table_lookup(fib_index, &pfx_0_0);
4603
4604     FIB_TEST((fei == dfrt), "default route same index");
4605     ai = fib_entry_get_adj(fei);
4606     FIB_TEST((FIB_NODE_INDEX_INVALID != ai), "default route adj present");
4607     adj = adj_get(ai);
4608     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
4609              "adj is incomplete");
4610     FIB_TEST((0 == ip46_address_cmp(&nh_2001_2, &adj->sub_type.nbr.next_hop)),
4611              "adj nbr next-hop ok");
4612
4613     /*
4614      * find the adj in the shared db
4615      */
4616     locked_ai = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
4617                                     VNET_LINK_IP6,
4618                                     &nh_2001_2,
4619                                     tm->hw[0]->sw_if_index);
4620     FIB_TEST((locked_ai == ai), "ADJ NBR DB find");
4621     adj_unlock(locked_ai);
4622
4623     /*
4624      * no more entries. +1 shared path-list
4625      */
4626     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
4627              fib_path_list_db_size());
4628     FIB_TEST((PNPS+3 == fib_path_list_pool_size()), "path list pool size is%d",
4629              fib_path_list_pool_size());
4630     FIB_TEST((ENPS+2 == fib_entry_pool_size()), "entry pool size is %d",
4631              fib_entry_pool_size());
4632
4633     /*
4634      * remove the API source from the default route. We expected
4635      * the route to remain, sourced by DEFAULT_ROUTE, and hence a DROP
4636      */
4637     fib_table_entry_path_remove(fib_index, &pfx_0_0,
4638                                 FIB_SOURCE_API,
4639                                 DPO_PROTO_IP6,
4640                                 &nh_2001_2,
4641                                 tm->hw[0]->sw_if_index,
4642                                 ~0,
4643                                 1,
4644                                 FIB_ROUTE_PATH_FLAG_NONE);
4645     fei = fib_table_lookup(fib_index, &pfx_0_0);
4646
4647     FIB_TEST((fei == dfrt), "default route same index");
4648     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(dfrt)),
4649              "Default route is DROP");
4650
4651     /*
4652      * no more entries. -1 shared path-list
4653      */
4654     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
4655              fib_path_list_db_size());
4656     FIB_TEST((PNPS+2 == fib_path_list_pool_size()), "path list pool size is%d",
4657              fib_path_list_pool_size());
4658     FIB_TEST((ENPS+2 == fib_entry_pool_size()), "entry pool size is %d",
4659              fib_entry_pool_size());
4660
4661     /*
4662      * Add an 2 ARP entry => a complete ADJ plus adj-fib.
4663      */
4664     fib_prefix_t pfx_2001_1_2_s_128 = {
4665         .fp_len   = 128,
4666         .fp_proto = FIB_PROTOCOL_IP6,
4667         .fp_addr  = {
4668             .ip6 = {
4669                 .as_u64 = {
4670                     [0] = clib_host_to_net_u64(0x2001000000000001),
4671                     [1] = clib_host_to_net_u64(0x0000000000000002),
4672                 },
4673             },
4674         }
4675     };
4676     fib_prefix_t pfx_2001_1_3_s_128 = {
4677         .fp_len   = 128,
4678         .fp_proto = FIB_PROTOCOL_IP6,
4679         .fp_addr  = {
4680             .ip6 = {
4681                 .as_u64 = {
4682                     [0] = clib_host_to_net_u64(0x2001000000000001),
4683                     [1] = clib_host_to_net_u64(0x0000000000000003),
4684                 },
4685             },
4686         }
4687     };
4688     u8 eth_addr[] = {
4689         0xde, 0xde, 0xde, 0xba, 0xba, 0xba,
4690     };
4691
4692     ai_01 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
4693                                 VNET_LINK_IP6,
4694                                 &pfx_2001_1_2_s_128.fp_addr,
4695                                 tm->hw[0]->sw_if_index);
4696     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_01), "adj created");
4697     adj = adj_get(ai_01);
4698     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
4699              "adj is incomplete");
4700     FIB_TEST((0 == ip46_address_cmp(&pfx_2001_1_2_s_128.fp_addr,
4701                                     &adj->sub_type.nbr.next_hop)),
4702              "adj nbr next-hop ok");
4703
4704     adj_nbr_update_rewrite(ai_01, ADJ_NBR_REWRITE_FLAG_COMPLETE,
4705                            fib_test_build_rewrite(eth_addr));
4706     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
4707              "adj is complete");
4708     FIB_TEST((0 == ip46_address_cmp(&pfx_2001_1_2_s_128.fp_addr,
4709                                     &adj->sub_type.nbr.next_hop)),
4710              "adj nbr next-hop ok");
4711
4712     fib_table_entry_path_add(fib_index,
4713                              &pfx_2001_1_2_s_128,
4714                              FIB_SOURCE_ADJ,
4715                              FIB_ENTRY_FLAG_ATTACHED,
4716                              DPO_PROTO_IP6,
4717                              &pfx_2001_1_2_s_128.fp_addr,
4718                              tm->hw[0]->sw_if_index,
4719                              ~0,
4720                              1,
4721                              NULL,
4722                              FIB_ROUTE_PATH_FLAG_NONE);
4723
4724     fei = fib_table_lookup(fib_index, &pfx_2001_1_2_s_128);
4725     ai = fib_entry_get_adj(fei);
4726     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj");
4727
4728     eth_addr[5] = 0xb2;
4729
4730     ai_02 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
4731                                 VNET_LINK_IP6,
4732                                 &pfx_2001_1_3_s_128.fp_addr,
4733                                 tm->hw[0]->sw_if_index);
4734     FIB_TEST((FIB_NODE_INDEX_INVALID != ai_02), "adj created");
4735     adj = adj_get(ai_02);
4736     FIB_TEST((IP_LOOKUP_NEXT_ARP == adj->lookup_next_index),
4737              "adj is incomplete");
4738     FIB_TEST((0 == ip46_address_cmp(&pfx_2001_1_3_s_128.fp_addr,
4739                                     &adj->sub_type.nbr.next_hop)),
4740              "adj nbr next-hop ok");
4741
4742     adj_nbr_update_rewrite(ai_02, ADJ_NBR_REWRITE_FLAG_COMPLETE,
4743                            fib_test_build_rewrite(eth_addr));
4744     FIB_TEST((IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index),
4745              "adj is complete");
4746     FIB_TEST((0 == ip46_address_cmp(&pfx_2001_1_3_s_128.fp_addr,
4747                                     &adj->sub_type.nbr.next_hop)),
4748              "adj nbr next-hop ok");
4749     FIB_TEST((ai_01 != ai_02), "ADJs are different");
4750
4751     fib_table_entry_path_add(fib_index,
4752                              &pfx_2001_1_3_s_128,
4753                              FIB_SOURCE_ADJ,
4754                              FIB_ENTRY_FLAG_ATTACHED,
4755                              DPO_PROTO_IP6,
4756                              &pfx_2001_1_3_s_128.fp_addr,
4757                              tm->hw[0]->sw_if_index,
4758                              ~0,
4759                              1,
4760                              NULL,
4761                              FIB_ROUTE_PATH_FLAG_NONE);
4762
4763     fei = fib_table_lookup(fib_index, &pfx_2001_1_3_s_128);
4764     ai = fib_entry_get_adj(fei);
4765     FIB_TEST((ai_02 == ai), "ADJ-FIB resolves via adj");
4766
4767     /*
4768      * +2 entries, +2 unshread path-lists.
4769      */
4770     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
4771              fib_path_list_db_size());
4772     FIB_TEST((PNPS+4 == fib_path_list_pool_size()), "path list pool size is%d",
4773              fib_path_list_pool_size());
4774     FIB_TEST((ENPS+4 == fib_entry_pool_size()), "entry pool size is %d",
4775              fib_entry_pool_size());
4776
4777     /*
4778      * Add a 2 routes via the first ADJ. ensure path-list sharing
4779      */
4780     fib_prefix_t pfx_2001_a_s_64 = {
4781         .fp_len   = 64,
4782         .fp_proto = FIB_PROTOCOL_IP6,
4783         .fp_addr  = {
4784             .ip6 = {
4785                 .as_u64 = {
4786                     [0] = clib_host_to_net_u64(0x200100000000000a),
4787                     [1] = clib_host_to_net_u64(0x0000000000000000),
4788                 },
4789             },
4790         }
4791     };
4792     fib_prefix_t pfx_2001_b_s_64 = {
4793         .fp_len   = 64,
4794         .fp_proto = FIB_PROTOCOL_IP6,
4795         .fp_addr  = {
4796             .ip6 = {
4797                 .as_u64 = {
4798                     [0] = clib_host_to_net_u64(0x200100000000000b),
4799                     [1] = clib_host_to_net_u64(0x0000000000000000),
4800                 },
4801             },
4802         }
4803     };
4804
4805     fib_table_entry_path_add(fib_index,
4806                              &pfx_2001_a_s_64,
4807                              FIB_SOURCE_API,
4808                              FIB_ENTRY_FLAG_NONE,
4809                              DPO_PROTO_IP6,
4810                              &nh_2001_2,
4811                              tm->hw[0]->sw_if_index,
4812                              ~0,
4813                              1,
4814                              NULL,
4815                              FIB_ROUTE_PATH_FLAG_NONE);
4816     fei = fib_table_lookup(fib_index, &pfx_2001_a_s_64);
4817     ai = fib_entry_get_adj(fei);
4818     FIB_TEST((ai_01 == ai), "2001::a/64 resolves via 2001:0:0:1::1");
4819     fib_table_entry_path_add(fib_index,
4820                              &pfx_2001_b_s_64,
4821                              FIB_SOURCE_API,
4822                              FIB_ENTRY_FLAG_NONE,
4823                              DPO_PROTO_IP6,
4824                              &nh_2001_2,
4825                              tm->hw[0]->sw_if_index,
4826                              ~0,
4827                              1,
4828                              NULL,
4829                              FIB_ROUTE_PATH_FLAG_NONE);
4830     fei = fib_table_lookup(fib_index, &pfx_2001_b_s_64);
4831     ai = fib_entry_get_adj(fei);
4832     FIB_TEST((ai_01 == ai), "2001::b/64 resolves via 2001:0:0:1::1");
4833
4834     /*
4835      * +2 entries, +1 shared path-list.
4836      */
4837     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
4838              fib_path_list_db_size());
4839     FIB_TEST((PNPS+5 == fib_path_list_pool_size()), "path list pool size is%d",
4840              fib_path_list_pool_size());
4841     FIB_TEST((ENPS+6 == fib_entry_pool_size()), "entry pool size is %d",
4842              fib_entry_pool_size());
4843
4844     /*
4845      * add a v4 prefix via a v6 next-hop
4846      */
4847     fib_prefix_t pfx_1_1_1_1_s_32 = {
4848         .fp_len = 32,
4849         .fp_proto = FIB_PROTOCOL_IP4,
4850         .fp_addr = {
4851             .ip4.as_u32 = 0x01010101,
4852         },
4853     };
4854     fei = fib_table_entry_path_add(0, // default table
4855                                    &pfx_1_1_1_1_s_32,
4856                                    FIB_SOURCE_API,
4857                                    FIB_ENTRY_FLAG_NONE,
4858                                    DPO_PROTO_IP6,
4859                                    &nh_2001_2,
4860                                    tm->hw[0]->sw_if_index,
4861                                    ~0,
4862                                    1,
4863                                    NULL,
4864                                    FIB_ROUTE_PATH_FLAG_NONE);
4865     FIB_TEST(fei == fib_table_lookup_exact_match(0, &pfx_1_1_1_1_s_32),
4866              "1.1.1.1/32 o v6 route present");
4867     ai = fib_entry_get_adj(fei);
4868     adj = adj_get(ai);
4869     FIB_TEST((adj->lookup_next_index == IP_LOOKUP_NEXT_ARP),
4870              "1.1.1.1/32 via ARP-adj");
4871     FIB_TEST((adj->ia_link == VNET_LINK_IP4),
4872              "1.1.1.1/32 ADJ-adj is link type v4");
4873     FIB_TEST((adj->ia_nh_proto == FIB_PROTOCOL_IP6),
4874              "1.1.1.1/32 ADJ-adj is NH proto v6");
4875     fib_table_entry_delete(0, &pfx_1_1_1_1_s_32, FIB_SOURCE_API);
4876
4877     /*
4878      * An attached route
4879      */
4880     fib_prefix_t pfx_2001_c_s_64 = {
4881         .fp_len   = 64,
4882         .fp_proto = FIB_PROTOCOL_IP6,
4883         .fp_addr  = {
4884             .ip6 = {
4885                 .as_u64 = {
4886                     [0] = clib_host_to_net_u64(0x200100000000000c),
4887                     [1] = clib_host_to_net_u64(0x0000000000000000),
4888                 },
4889             },
4890         }
4891     };
4892     fib_table_entry_path_add(fib_index,
4893                              &pfx_2001_c_s_64,
4894                              FIB_SOURCE_CLI,
4895                              FIB_ENTRY_FLAG_ATTACHED,
4896                              DPO_PROTO_IP6,
4897                              NULL,
4898                              tm->hw[0]->sw_if_index,
4899                              ~0,
4900                              1,
4901                              NULL,
4902                              FIB_ROUTE_PATH_FLAG_NONE);
4903     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_c_s_64);
4904     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached route present");
4905     ai = fib_entry_get_adj(fei);
4906     adj = adj_get(ai);
4907     FIB_TEST((adj->lookup_next_index == IP_LOOKUP_NEXT_GLEAN),
4908              "2001:0:0:c/64 attached resolves via glean");
4909
4910     fib_table_entry_path_remove(fib_index,
4911                                 &pfx_2001_c_s_64,
4912                                 FIB_SOURCE_CLI,
4913                                 DPO_PROTO_IP6,
4914                                 NULL,
4915                                 tm->hw[0]->sw_if_index,
4916                                 ~0,
4917                                 1,
4918                                 FIB_ROUTE_PATH_FLAG_NONE);
4919     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_c_s_64);
4920     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "attached route removed");
4921
4922     /*
4923      * Shutdown the interface on which we have a connected and through
4924      * which the routes are reachable.
4925      * This will result in the connected, adj-fibs, and routes linking to drop
4926      * The local/for-us prefix continues to receive.
4927      */
4928     clib_error_t * error;
4929
4930     error = vnet_sw_interface_set_flags(vnet_get_main(),
4931                                         tm->hw[0]->sw_if_index,
4932                                         ~VNET_SW_INTERFACE_FLAG_ADMIN_UP);
4933     FIB_TEST((NULL == error), "Interface shutdown OK");
4934
4935     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
4936     dpo = fib_entry_contribute_ip_forwarding(fei);
4937     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
4938              "2001::b/64 resolves via drop");
4939
4940     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
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::a/64 resolves via drop");
4944     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_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::3/64 resolves via drop");
4948     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
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::2/64 resolves via drop");
4952     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
4953     dpo = fib_entry_contribute_ip_forwarding(fei);
4954     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
4955              "2001:0:0:1::1/128 not drop");
4956     local_pfx.fp_len = 64;
4957     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
4958     dpo = fib_entry_contribute_ip_forwarding(fei);
4959     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
4960              "2001:0:0:1/64 resolves via drop");
4961
4962     /*
4963      * no change
4964      */
4965     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
4966              fib_path_list_db_size());
4967     FIB_TEST((PNPS+5 == fib_path_list_pool_size()), "path list pool size is%d",
4968              fib_path_list_pool_size());
4969     FIB_TEST((ENPS+6 == fib_entry_pool_size()), "entry pool size is %d",
4970              fib_entry_pool_size());
4971
4972     /*
4973      * shutdown one of the other interfaces, then add a connected.
4974      * and swap one of the routes to it.
4975      */
4976     error = vnet_sw_interface_set_flags(vnet_get_main(),
4977                                         tm->hw[1]->sw_if_index,
4978                                         ~VNET_SW_INTERFACE_FLAG_ADMIN_UP);
4979     FIB_TEST((NULL == error), "Interface 1 shutdown OK");
4980
4981     fib_prefix_t connected_pfx = {
4982         .fp_len = 64,
4983         .fp_proto = FIB_PROTOCOL_IP6,
4984         .fp_addr = {
4985             .ip6 = {
4986                 /* 2001:0:0:2::1/64 */
4987                 .as_u64 = {
4988                     [0] = clib_host_to_net_u64(0x2001000000000002),
4989                     [1] = clib_host_to_net_u64(0x0000000000000001),
4990                 },
4991             },
4992         }
4993     };
4994     fib_table_entry_update_one_path(fib_index, &connected_pfx,
4995                                     FIB_SOURCE_INTERFACE,
4996                                     (FIB_ENTRY_FLAG_CONNECTED |
4997                                      FIB_ENTRY_FLAG_ATTACHED),
4998                                     DPO_PROTO_IP6,
4999                                     NULL,
5000                                     tm->hw[1]->sw_if_index,
5001                                     ~0,
5002                                     1,
5003                                     NULL,
5004                                     FIB_ROUTE_PATH_FLAG_NONE);
5005     fei = fib_table_lookup_exact_match(fib_index, &connected_pfx);
5006     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached interface route present");
5007     dpo = fib_entry_contribute_ip_forwarding(fei);
5008     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
5009     FIB_TEST(!dpo_cmp(dpo, dpo_drop),
5010              "2001:0:0:2/64 not resolves via drop");
5011
5012     connected_pfx.fp_len = 128;
5013     fib_table_entry_update_one_path(fib_index, &connected_pfx,
5014                                     FIB_SOURCE_INTERFACE,
5015                                     (FIB_ENTRY_FLAG_CONNECTED |
5016                                      FIB_ENTRY_FLAG_LOCAL),
5017                                     DPO_PROTO_IP6,
5018                                     NULL,
5019                                     tm->hw[0]->sw_if_index,
5020                                     ~0, // invalid fib index
5021                                     1,
5022                                     NULL,
5023                                     FIB_ROUTE_PATH_FLAG_NONE);
5024     fei = fib_table_lookup(fib_index, &connected_pfx);
5025
5026     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local interface route present");
5027     dpo = fib_entry_contribute_ip_forwarding(fei);
5028     dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
5029     FIB_TEST((DPO_RECEIVE == dpo->dpoi_type),
5030              "local interface adj is local");
5031     rd = receive_dpo_get(dpo->dpoi_index);
5032     FIB_TEST((0 == ip46_address_cmp(&connected_pfx.fp_addr,
5033                                     &rd->rd_addr)),
5034              "local interface adj is receive ok");
5035
5036     /*
5037      * +2 entries, +2 unshared path-lists
5038      */
5039     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
5040              fib_path_list_db_size());
5041     FIB_TEST((PNPS+7 == fib_path_list_pool_size()), "path list pool size is%d",
5042              fib_path_list_pool_size());
5043     FIB_TEST((ENPS+8 == fib_entry_pool_size()), "entry pool size is %d",
5044              fib_entry_pool_size());
5045
5046
5047     /*
5048      * bring the interface back up. we expected the routes to return
5049      * to normal forwarding.
5050      */
5051     error = vnet_sw_interface_set_flags(vnet_get_main(),
5052                                         tm->hw[0]->sw_if_index,
5053                                         VNET_SW_INTERFACE_FLAG_ADMIN_UP);
5054     FIB_TEST((NULL == error), "Interface bring-up OK");
5055     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
5056     ai = fib_entry_get_adj(fei);
5057     FIB_TEST((ai_01 == ai), "2001::a/64 resolves via 2001:0:0:1::1");
5058     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
5059     ai = fib_entry_get_adj(fei);
5060     FIB_TEST((ai_01 == ai), "2001::b/64 resolves via 2001:0:0:1::1");
5061     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
5062     ai = fib_entry_get_adj(fei);
5063     FIB_TEST((ai_02 == ai), "ADJ-FIB resolves via adj");
5064     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5065     ai = fib_entry_get_adj(fei);
5066     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj");
5067     local_pfx.fp_len = 64;
5068     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5069     ai = fib_entry_get_adj(fei);
5070     adj = adj_get(ai);
5071     FIB_TEST((IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index),
5072              "attached interface adj is glean");
5073
5074     /*
5075      * Same test as above, but this time the HW interface goes down
5076      */
5077     error = vnet_hw_interface_set_flags(vnet_get_main(),
5078                                         tm->hw_if_indicies[0],
5079                                         ~VNET_HW_INTERFACE_FLAG_LINK_UP);
5080     FIB_TEST((NULL == error), "Interface shutdown OK");
5081
5082     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_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::b/64 resolves via drop");
5086     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
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::a/64 resolves via drop");
5090     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_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::3/128 resolves via drop");
5094     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5095     dpo = fib_entry_contribute_ip_forwarding(fei);
5096     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5097              "2001:0:0:1::2/128 resolves via drop");
5098     local_pfx.fp_len = 128;
5099     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5100     dpo = fib_entry_contribute_ip_forwarding(fei);
5101     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5102              "2001:0:0:1::1/128 not drop");
5103     local_pfx.fp_len = 64;
5104     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5105     dpo = fib_entry_contribute_ip_forwarding(fei);
5106     FIB_TEST(!dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5107              "2001:0:0:1/64 resolves via drop");
5108
5109     error = vnet_hw_interface_set_flags(vnet_get_main(),
5110                                         tm->hw_if_indicies[0],
5111                                         VNET_HW_INTERFACE_FLAG_LINK_UP);
5112     FIB_TEST((NULL == error), "Interface bring-up OK");
5113     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
5114     ai = fib_entry_get_adj(fei);
5115     FIB_TEST((ai_01 == ai), "2001::a/64 resolves via 2001:0:0:1::1");
5116     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
5117     ai = fib_entry_get_adj(fei);
5118     FIB_TEST((ai_01 == ai), "2001::b/64 resolves via 2001:0:0:1::1");
5119     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
5120     ai = fib_entry_get_adj(fei);
5121     FIB_TEST((ai_02 == ai), "ADJ-FIB resolves via adj");
5122     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5123     ai = fib_entry_get_adj(fei);
5124     FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj");
5125     local_pfx.fp_len = 64;
5126     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5127     ai = fib_entry_get_adj(fei);
5128     adj = adj_get(ai);
5129     FIB_TEST((IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index),
5130              "attached interface adj is glean");
5131
5132     /*
5133      * Delete the interface that the routes reolve through.
5134      * Again no routes are removed. They all point to drop.
5135      *
5136      * This is considered an error case. The control plane should
5137      * not remove interfaces through which routes resolve, but
5138      * such things can happen. ALL affected routes will drop.
5139      */
5140     vnet_delete_hw_interface(vnet_get_main(), tm->hw_if_indicies[0]);
5141
5142     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
5143     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5144              "2001::b/64 resolves via drop");
5145     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
5146     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5147              "2001::b/64 resolves via drop");
5148     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
5149     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5150              "2001:0:0:1::3/64 resolves via drop");
5151     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5152     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5153              "2001:0:0:1::2/64 resolves via drop");
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::1/128 is drop");
5157     local_pfx.fp_len = 64;
5158     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5159     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5160              "2001:0:0:1/64 resolves via drop");
5161
5162     /*
5163      * no change
5164      */
5165     FIB_TEST((1 == fib_path_list_db_size()),   "path list DB population:%d",
5166              fib_path_list_db_size());
5167     FIB_TEST((PNPS+7 == fib_path_list_pool_size()), "path list pool size is%d",
5168              fib_path_list_pool_size());
5169     FIB_TEST((ENPS+8 == fib_entry_pool_size()), "entry pool size is %d",
5170              fib_entry_pool_size());
5171
5172     /*
5173      * Add the interface back. routes stay unresolved.
5174      */
5175     error = ethernet_register_interface(vnet_get_main(),
5176                                         test_interface_device_class.index,
5177                                         0 /* instance */,
5178                                         hw_address,
5179                                         &tm->hw_if_indicies[0],
5180                                         /* flag change */ 0);
5181
5182     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64);
5183     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5184              "2001::b/64 resolves via drop");
5185     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64);
5186     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5187              "2001::b/64 resolves via drop");
5188     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128);
5189     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5190              "2001:0:0:1::3/64 resolves via drop");
5191     fei = fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128);
5192     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5193              "2001:0:0:1::2/64 resolves via drop");
5194     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5195     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5196              "2001:0:0:1::1/128 is drop");
5197     local_pfx.fp_len = 64;
5198     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5199     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
5200              "2001:0:0:1/64 resolves via drop");
5201
5202     /*
5203      * CLEANUP ALL the routes
5204      */
5205     fib_table_entry_delete(fib_index,
5206                            &pfx_2001_c_s_64,
5207                            FIB_SOURCE_API);
5208     fib_table_entry_delete(fib_index,
5209                            &pfx_2001_a_s_64,
5210                            FIB_SOURCE_API);
5211     fib_table_entry_delete(fib_index,
5212                            &pfx_2001_b_s_64,
5213                            FIB_SOURCE_API);
5214     fib_table_entry_delete(fib_index,
5215                            &pfx_2001_1_3_s_128,
5216                            FIB_SOURCE_ADJ);
5217     fib_table_entry_delete(fib_index,
5218                            &pfx_2001_1_2_s_128,
5219                            FIB_SOURCE_ADJ);
5220     local_pfx.fp_len = 64;
5221     fib_table_entry_delete(fib_index, &local_pfx,
5222                            FIB_SOURCE_INTERFACE);
5223     local_pfx.fp_len = 128;
5224     fib_table_entry_special_remove(fib_index, &local_pfx,
5225                                    FIB_SOURCE_INTERFACE);
5226     connected_pfx.fp_len = 64;
5227     fib_table_entry_delete(fib_index, &connected_pfx,
5228                            FIB_SOURCE_INTERFACE);
5229     connected_pfx.fp_len = 128;
5230     fib_table_entry_special_remove(fib_index, &connected_pfx,
5231                                    FIB_SOURCE_INTERFACE);
5232
5233     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5234               fib_table_lookup_exact_match(fib_index, &pfx_2001_a_s_64)),
5235              "2001::a/64 removed");
5236     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5237               fib_table_lookup_exact_match(fib_index, &pfx_2001_b_s_64)),
5238              "2001::b/64 removed");
5239     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5240               fib_table_lookup_exact_match(fib_index, &pfx_2001_1_3_s_128)),
5241              "2001:0:0:1::3/128 removed");
5242     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5243               fib_table_lookup_exact_match(fib_index, &pfx_2001_1_2_s_128)),
5244              "2001:0:0:1::3/128 removed");
5245     local_pfx.fp_len = 64;
5246     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5247               fib_table_lookup_exact_match(fib_index, &local_pfx)),
5248              "2001:0:0:1/64 removed");
5249     local_pfx.fp_len = 128;
5250     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5251               fib_table_lookup_exact_match(fib_index, &local_pfx)),
5252              "2001:0:0:1::1/128 removed");
5253     connected_pfx.fp_len = 64;
5254     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5255               fib_table_lookup_exact_match(fib_index, &connected_pfx)),
5256              "2001:0:0:2/64 removed");
5257     connected_pfx.fp_len = 128;
5258     FIB_TEST((FIB_NODE_INDEX_INVALID ==
5259               fib_table_lookup_exact_match(fib_index, &connected_pfx)),
5260              "2001:0:0:2::1/128 removed");
5261
5262     /*
5263      * -8 entries. -7 path-lists (1 was shared).
5264      */
5265     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
5266              fib_path_list_db_size());
5267     FIB_TEST((PNPS == fib_path_list_pool_size()), "path list pool size is%d",
5268              fib_path_list_pool_size());
5269     FIB_TEST((ENPS == fib_entry_pool_size()), "entry pool size is %d",
5270              fib_entry_pool_size());
5271
5272     /*
5273      * now remove the VRF
5274      */
5275     fib_table_unlock(fib_index, FIB_PROTOCOL_IP6, FIB_SOURCE_API);
5276
5277     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
5278              fib_path_list_db_size());
5279     FIB_TEST((PNPS-2 == fib_path_list_pool_size()), "path list pool size is%d",
5280              fib_path_list_pool_size());
5281     FIB_TEST((ENPS-2 == fib_entry_pool_size()), "entry pool size is %d",
5282              fib_entry_pool_size());
5283
5284     adj_unlock(ai_02);
5285     adj_unlock(ai_01);
5286
5287     /*
5288      * return the interfaces to up state
5289      */
5290     error = vnet_sw_interface_set_flags(vnet_get_main(),
5291                                         tm->hw[0]->sw_if_index,
5292                                         VNET_SW_INTERFACE_FLAG_ADMIN_UP);
5293     error = vnet_sw_interface_set_flags(vnet_get_main(),
5294                                         tm->hw[1]->sw_if_index,
5295                                         VNET_SW_INTERFACE_FLAG_ADMIN_UP);
5296
5297     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
5298              adj_nbr_db_size());
5299     FIB_TEST((0 == adj_glean_db_size()), "ADJ DB size is %d",
5300              adj_glean_db_size());
5301
5302     return (res);
5303 }
5304
5305 /*
5306  * Test Attached Exports
5307  */
5308 static int
5309 fib_test_ae (void)
5310 {
5311     const dpo_id_t *dpo, *dpo_drop;
5312     const u32 fib_index = 0;
5313     fib_node_index_t fei;
5314     test_main_t *tm;
5315     ip4_main_t *im;
5316     int res;
5317
5318     res = 0;
5319     tm = &test_main;
5320     im = &ip4_main;
5321
5322     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
5323              adj_nbr_db_size());
5324
5325     /*
5326      * add interface routes. We'll assume this works. It's more rigorously
5327      * tested elsewhere.
5328      */
5329     fib_prefix_t local_pfx = {
5330         .fp_len = 24,
5331         .fp_proto = FIB_PROTOCOL_IP4,
5332         .fp_addr = {
5333             .ip4 = {
5334                 /* 10.10.10.10 */
5335                 .as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
5336             },
5337         },
5338     };
5339
5340     im->fib_index_by_sw_if_index[tm->hw[0]->sw_if_index] = fib_index;
5341
5342     dpo_drop = drop_dpo_get(DPO_PROTO_IP4);
5343
5344     fib_table_entry_update_one_path(fib_index, &local_pfx,
5345                                     FIB_SOURCE_INTERFACE,
5346                                     (FIB_ENTRY_FLAG_CONNECTED |
5347                                      FIB_ENTRY_FLAG_ATTACHED),
5348                                     DPO_PROTO_IP4,
5349                                     NULL,
5350                                     tm->hw[0]->sw_if_index,
5351                                     ~0,
5352                                     1,
5353                                     NULL,
5354                                     FIB_ROUTE_PATH_FLAG_NONE);
5355     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5356     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
5357              "attached interface route present");
5358
5359     local_pfx.fp_len = 32;
5360     fib_table_entry_update_one_path(fib_index, &local_pfx,
5361                                     FIB_SOURCE_INTERFACE,
5362                                     (FIB_ENTRY_FLAG_CONNECTED |
5363                                      FIB_ENTRY_FLAG_LOCAL),
5364                                     DPO_PROTO_IP4,
5365                                     NULL,
5366                                     tm->hw[0]->sw_if_index,
5367                                     ~0, // invalid fib index
5368                                     1,
5369                                     NULL,
5370                                     FIB_ROUTE_PATH_FLAG_NONE);
5371     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5372
5373     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
5374              "local interface route present");
5375
5376     /*
5377      * Add an 2 ARP entry => a complete ADJ plus adj-fib.
5378      */
5379     fib_prefix_t pfx_10_10_10_1_s_32 = {
5380         .fp_len = 32,
5381         .fp_proto = FIB_PROTOCOL_IP4,
5382         .fp_addr = {
5383             /* 10.10.10.1 */
5384             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
5385         },
5386     };
5387     fib_node_index_t ai;
5388
5389     fib_table_entry_path_add(fib_index,
5390                              &pfx_10_10_10_1_s_32,
5391                              FIB_SOURCE_ADJ,
5392                              FIB_ENTRY_FLAG_ATTACHED,
5393                              DPO_PROTO_IP4,
5394                              &pfx_10_10_10_1_s_32.fp_addr,
5395                              tm->hw[0]->sw_if_index,
5396                              ~0, // invalid fib index
5397                              1,
5398                              NULL,
5399                              FIB_ROUTE_PATH_FLAG_NONE);
5400
5401     fei = fib_table_lookup(fib_index, &pfx_10_10_10_1_s_32);
5402     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 created");
5403     ai = fib_entry_get_adj(fei);
5404
5405     /*
5406      * create another FIB table into which routes will be imported
5407      */
5408     u32 import_fib_index1;
5409
5410     import_fib_index1 = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4,
5411                                                           11,
5412                                                           FIB_SOURCE_CLI);
5413
5414     /*
5415      * Add an attached route in the import FIB
5416      */
5417     local_pfx.fp_len = 24;
5418     fib_table_entry_update_one_path(import_fib_index1,
5419                                     &local_pfx,
5420                                     FIB_SOURCE_API,
5421                                     FIB_ENTRY_FLAG_NONE,
5422                                     DPO_PROTO_IP4,
5423                                     NULL,
5424                                     tm->hw[0]->sw_if_index,
5425                                     ~0, // invalid fib index
5426                                     1,
5427                                     NULL,
5428                                     FIB_ROUTE_PATH_FLAG_NONE);
5429     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5430     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached export created");
5431
5432     /*
5433      * check for the presence of the adj-fibs in the import table
5434      */
5435     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5436     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 imported");
5437     FIB_TEST((ai == fib_entry_get_adj(fei)),
5438              "adj-fib1 Import uses same adj as export");
5439
5440     /*
5441      * check for the presence of the local in the import table
5442      */
5443     local_pfx.fp_len = 32;
5444     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5445     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported");
5446
5447     /*
5448      * Add another adj-fin in the export table. Expect this
5449      * to get magically exported;
5450      */
5451     fib_prefix_t pfx_10_10_10_2_s_32 = {
5452         .fp_len = 32,
5453         .fp_proto = FIB_PROTOCOL_IP4,
5454         .fp_addr = {
5455             /* 10.10.10.2 */
5456             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
5457         },
5458     };
5459
5460     fib_table_entry_path_add(fib_index,
5461                              &pfx_10_10_10_2_s_32,
5462                              FIB_SOURCE_ADJ,
5463                              FIB_ENTRY_FLAG_ATTACHED,
5464                              DPO_PROTO_IP4,
5465                              &pfx_10_10_10_2_s_32.fp_addr,
5466                              tm->hw[0]->sw_if_index,
5467                              ~0, // invalid fib index
5468                              1,
5469                              NULL,
5470                              FIB_ROUTE_PATH_FLAG_NONE);
5471     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_2_s_32);
5472     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 present");
5473     ai = fib_entry_get_adj(fei);
5474
5475     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5476     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported");
5477     FIB_TEST((ai == fib_entry_get_adj(fei)),
5478              "Import uses same adj as export");
5479     FIB_TEST((FIB_ENTRY_FLAG_ATTACHED & fib_entry_get_flags(fei)),
5480              "ADJ-fib2 imported flags %d",
5481              fib_entry_get_flags(fei));
5482
5483     /*
5484      * create a 2nd FIB table into which routes will be imported
5485      */
5486     u32 import_fib_index2;
5487
5488     import_fib_index2 = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, 12,
5489                                                           FIB_SOURCE_CLI);
5490
5491     /*
5492      * Add an attached route in the import FIB
5493      */
5494     local_pfx.fp_len = 24;
5495     fib_table_entry_update_one_path(import_fib_index2,
5496                                     &local_pfx,
5497                                     FIB_SOURCE_API,
5498                                     FIB_ENTRY_FLAG_NONE,
5499                                     DPO_PROTO_IP4,
5500                                     NULL,
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(import_fib_index1, &local_pfx);
5507     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached export created");
5508
5509     /*
5510      * check for the presence of all the adj-fibs and local in the import table
5511      */
5512     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_1_s_32);
5513     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 imported");
5514     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_2_s_32);
5515     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported");
5516     local_pfx.fp_len = 32;
5517     fei = fib_table_lookup_exact_match(import_fib_index2, &local_pfx);
5518     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported");
5519
5520     /*
5521      * add a 3rd adj-fib. expect it to be exported to both tables.
5522      */
5523     fib_prefix_t pfx_10_10_10_3_s_32 = {
5524         .fp_len = 32,
5525         .fp_proto = FIB_PROTOCOL_IP4,
5526         .fp_addr = {
5527             /* 10.10.10.3 */
5528             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a03),
5529         },
5530     };
5531
5532     fib_table_entry_path_add(fib_index,
5533                              &pfx_10_10_10_3_s_32,
5534                              FIB_SOURCE_ADJ,
5535                              FIB_ENTRY_FLAG_ATTACHED,
5536                              DPO_PROTO_IP4,
5537                              &pfx_10_10_10_3_s_32.fp_addr,
5538                              tm->hw[0]->sw_if_index,
5539                              ~0, // invalid fib index
5540                              1,
5541                              NULL,
5542                              FIB_ROUTE_PATH_FLAG_NONE);
5543     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3_s_32);
5544     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib3 present");
5545     ai = fib_entry_get_adj(fei);
5546
5547     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_3_s_32);
5548     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib3 imported to FIB1");
5549     FIB_TEST((ai == fib_entry_get_adj(fei)),
5550              "Import uses same adj as export");
5551     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_3_s_32);
5552     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib3 imported to FIB2");
5553     FIB_TEST((ai == fib_entry_get_adj(fei)),
5554              "Import uses same adj as export");
5555
5556     /*
5557      * remove the 3rd adj fib. we expect it to be removed from both FIBs
5558      */
5559     fib_table_entry_delete(fib_index,
5560                            &pfx_10_10_10_3_s_32,
5561                            FIB_SOURCE_ADJ);
5562
5563     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3_s_32);
5564     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib3 remved");
5565
5566     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_3_s_32);
5567     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib3 removed from FIB1");
5568
5569     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_3_s_32);
5570     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib3 removed from FIB2");
5571
5572     /*
5573      * remove the attached route from the 2nd FIB. expect the imported
5574      * entries to be removed
5575      */
5576     local_pfx.fp_len = 24;
5577     fib_table_entry_delete(import_fib_index2,
5578                            &local_pfx,
5579                            FIB_SOURCE_API);
5580     fei = fib_table_lookup_exact_match(import_fib_index2, &local_pfx);
5581     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "attached export removed");
5582
5583     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_1_s_32);
5584     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib1 removed from FIB2");
5585     fei = fib_table_lookup_exact_match(import_fib_index2, &pfx_10_10_10_2_s_32);
5586     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib2 removed from FIB2");
5587     local_pfx.fp_len = 32;
5588     fei = fib_table_lookup_exact_match(import_fib_index2, &local_pfx);
5589     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "local removed from FIB2");
5590
5591     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5592     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 still in FIB1");
5593     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5594     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 still in FIB1");
5595     local_pfx.fp_len = 32;
5596     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5597     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local still in FIB1");
5598
5599     /*
5600      * modify the route in FIB1 so it is no longer attached. expect the imported
5601      * entries to be removed
5602      */
5603     local_pfx.fp_len = 24;
5604     fib_table_entry_update_one_path(import_fib_index1,
5605                                     &local_pfx,
5606                                     FIB_SOURCE_API,
5607                                     FIB_ENTRY_FLAG_NONE,
5608                                     DPO_PROTO_IP4,
5609                                     &pfx_10_10_10_2_s_32.fp_addr,
5610                                     tm->hw[0]->sw_if_index,
5611                                     ~0, // invalid fib index
5612                                     1,
5613                                     NULL,
5614                                     FIB_ROUTE_PATH_FLAG_NONE);
5615     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5616     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib1 removed from FIB1");
5617     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5618     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib2 removed from FIB1");
5619     local_pfx.fp_len = 32;
5620     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5621     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "local removed from FIB1");
5622
5623     /*
5624      * modify it back to attached. expect the adj-fibs back
5625      */
5626     local_pfx.fp_len = 24;
5627     fib_table_entry_update_one_path(import_fib_index1,
5628                                     &local_pfx,
5629                                     FIB_SOURCE_API,
5630                                     FIB_ENTRY_FLAG_NONE,
5631                                     DPO_PROTO_IP4,
5632                                     NULL,
5633                                     tm->hw[0]->sw_if_index,
5634                                     ~0, // invalid fib index
5635                                     1,
5636                                     NULL,
5637                                     FIB_ROUTE_PATH_FLAG_NONE);
5638     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5639     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 imported in FIB1");
5640     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5641     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported in FIB1");
5642     local_pfx.fp_len = 32;
5643     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5644     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported in FIB1");
5645
5646     /*
5647      * add a covering attached next-hop for the interface address, so we have
5648      * a valid adj to find when we check the forwarding tables
5649      */
5650     fib_prefix_t pfx_10_0_0_0_s_8 = {
5651         .fp_len = 8,
5652         .fp_proto = FIB_PROTOCOL_IP4,
5653         .fp_addr = {
5654             /* 10.0.0.0 */
5655             .ip4.as_u32 = clib_host_to_net_u32(0x0a000000),
5656         },
5657     };
5658
5659     fei = fib_table_entry_update_one_path(fib_index,
5660                                           &pfx_10_0_0_0_s_8,
5661                                           FIB_SOURCE_API,
5662                                           FIB_ENTRY_FLAG_NONE,
5663                                           DPO_PROTO_IP4,
5664                                           &pfx_10_10_10_3_s_32.fp_addr,
5665                                           tm->hw[0]->sw_if_index,
5666                                           ~0, // invalid fib index
5667                                           1,
5668                                           NULL,
5669                                           FIB_ROUTE_PATH_FLAG_NONE);
5670     dpo = fib_entry_contribute_ip_forwarding(fei);
5671
5672     /*
5673      * remove the route in the export fib. expect the adj-fibs to be removed
5674      */
5675     local_pfx.fp_len = 24;
5676     fib_table_entry_delete(fib_index,
5677                            &local_pfx,
5678                            FIB_SOURCE_INTERFACE);
5679
5680     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5681     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "Delete export: ADJ-fib1 removed from FIB1");
5682     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5683     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib2 removed from FIB1");
5684     local_pfx.fp_len = 32;
5685     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5686     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "local removed from FIB1");
5687
5688     /*
5689      * the adj-fibs in the export VRF are present in the FIB table,
5690      * but not installed in forwarding, since they have no attached cover.
5691      * Consequently a lookup in the MTRIE gives the adj for the covering
5692      * route 10.0.0.0/8.
5693      */
5694     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
5695     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 in export");
5696
5697     index_t lbi;
5698     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_1_s_32.fp_addr.ip4);
5699     FIB_TEST(lbi == dpo->dpoi_index,
5700              "10.10.10.1 forwards on \n%U not \n%U",
5701              format_load_balance, lbi, 0,
5702              format_dpo_id, dpo, 0);
5703     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_2_s_32.fp_addr.ip4);
5704     FIB_TEST(lbi == dpo->dpoi_index,
5705              "10.10.10.2 forwards on %U", format_dpo_id, dpo, 0);
5706     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_3_s_32.fp_addr.ip4);
5707     FIB_TEST(lbi == dpo->dpoi_index,
5708              "10.10.10.3 forwards on %U", format_dpo_id, dpo, 0);
5709
5710     /*
5711      * add the export prefix back, but not as attached.
5712      * No adj-fibs in export nor import tables
5713      */
5714     local_pfx.fp_len = 24;
5715     fei = fib_table_entry_update_one_path(fib_index,
5716                                           &local_pfx,
5717                                           FIB_SOURCE_API,
5718                                           FIB_ENTRY_FLAG_NONE,
5719                                           DPO_PROTO_IP4,
5720                                           &pfx_10_10_10_1_s_32.fp_addr,
5721                                           tm->hw[0]->sw_if_index,
5722                                           ~0, // invalid fib index
5723                                           1,
5724                                           NULL,
5725                                           FIB_ROUTE_PATH_FLAG_NONE);
5726     dpo = fib_entry_contribute_ip_forwarding(fei);
5727
5728     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
5729     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "non-attached in export: ADJ-fib1 in export");
5730     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_1_s_32.fp_addr.ip4);
5731     FIB_TEST(lbi == dpo->dpoi_index,
5732              "10.10.10.1 forwards on %U", format_dpo_id, dpo, 0);
5733     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
5734     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 in export");
5735     lbi = ip4_fib_forwarding_lookup(fib_index, &pfx_10_10_10_2_s_32.fp_addr.ip4);
5736     FIB_TEST(lbi == dpo->dpoi_index,
5737              "10.10.10.2 forwards on %U", format_dpo_id, dpo, 0);
5738
5739     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5740     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib1 removed from FIB1");
5741     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5742     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "ADJ-fib2 removed from FIB1");
5743     local_pfx.fp_len = 32;
5744     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5745     FIB_TEST((FIB_NODE_INDEX_INVALID == fei), "local removed from FIB1");
5746
5747     /*
5748      * modify the export prefix so it is attached. expect all covereds to return
5749      */
5750     local_pfx.fp_len = 24;
5751     fib_table_entry_update_one_path(fib_index,
5752                                     &local_pfx,
5753                                     FIB_SOURCE_API,
5754                                     FIB_ENTRY_FLAG_NONE,
5755                                     DPO_PROTO_IP4,
5756                                     NULL,
5757                                     tm->hw[0]->sw_if_index,
5758                                     ~0, // invalid fib index
5759                                     1,
5760                                     NULL,
5761                                     FIB_ROUTE_PATH_FLAG_NONE);
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), "ADJ-fib1 reinstalled in export");
5765     dpo = fib_entry_contribute_ip_forwarding(fei);
5766     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5767              "Adj-fib1 is not drop in export");
5768     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_2_s_32);
5769     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 reinstalled in export");
5770     local_pfx.fp_len = 32;
5771     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5772     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local reinstalled in export");
5773     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5774     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached in export: ADJ-fib1 imported");
5775     dpo = fib_entry_contribute_ip_forwarding(fei);
5776     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5777              "Adj-fib1 is not drop in export: %U %U",
5778              format_dpo_id, dpo, 0,
5779              format_dpo_id, load_balance_get_bucket(dpo->dpoi_index, 0), 0);
5780     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5781     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 imported");
5782     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5783     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported");
5784     local_pfx.fp_len = 32;
5785     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5786     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported");
5787
5788     /*
5789      * modify the export prefix so connected. no change.
5790      */
5791     local_pfx.fp_len = 24;
5792     fib_table_entry_update_one_path(fib_index, &local_pfx,
5793                                     FIB_SOURCE_INTERFACE,
5794                                     (FIB_ENTRY_FLAG_CONNECTED |
5795                                      FIB_ENTRY_FLAG_ATTACHED),
5796                                     DPO_PROTO_IP4,
5797                                     NULL,
5798                                     tm->hw[0]->sw_if_index,
5799                                     ~0,
5800                                     1,
5801                                     NULL,
5802                                     FIB_ROUTE_PATH_FLAG_NONE);
5803
5804     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
5805     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 reinstalled in export");
5806     dpo = fib_entry_contribute_ip_forwarding(fei);
5807     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5808              "Adj-fib1 is not drop in export");
5809     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_2_s_32);
5810     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 reinstalled in export");
5811     local_pfx.fp_len = 32;
5812     fei = fib_table_lookup_exact_match(fib_index, &local_pfx);
5813     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local reinstalled in export");
5814     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_1_s_32);
5815     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "attached in export: ADJ-fib1 imported");
5816     dpo = fib_entry_contribute_ip_forwarding(fei);
5817     FIB_TEST(dpo_cmp(dpo_drop, load_balance_get_bucket(dpo->dpoi_index, 0)),
5818              "Adj-fib1 is not drop in export");
5819     fei = fib_table_lookup_exact_match(import_fib_index1, &pfx_10_10_10_2_s_32);
5820     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 imported");
5821     local_pfx.fp_len = 32;
5822     fei = fib_table_lookup_exact_match(import_fib_index1, &local_pfx);
5823     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "local imported");
5824
5825     /*
5826      * CLEANUP
5827      */
5828     fib_table_entry_delete(fib_index,
5829                            &pfx_10_0_0_0_s_8,
5830                            FIB_SOURCE_API);
5831     fib_table_entry_delete(fib_index,
5832                            &pfx_10_10_10_1_s_32,
5833                            FIB_SOURCE_ADJ);
5834     fib_table_entry_delete(fib_index,
5835                            &pfx_10_10_10_2_s_32,
5836                            FIB_SOURCE_ADJ);
5837     local_pfx.fp_len = 32;
5838     fib_table_entry_delete(fib_index,
5839                            &local_pfx,
5840                            FIB_SOURCE_INTERFACE);
5841     local_pfx.fp_len = 24;
5842     fib_table_entry_delete(fib_index,
5843                            &local_pfx,
5844                            FIB_SOURCE_API);
5845     fib_table_entry_delete(fib_index,
5846                            &local_pfx,
5847                            FIB_SOURCE_INTERFACE);
5848     local_pfx.fp_len = 24;
5849     fib_table_entry_delete(import_fib_index1,
5850                            &local_pfx,
5851                            FIB_SOURCE_API);
5852
5853     fib_table_unlock(import_fib_index1, FIB_PROTOCOL_IP4, FIB_SOURCE_CLI);
5854     fib_table_unlock(import_fib_index2, FIB_PROTOCOL_IP4, FIB_SOURCE_CLI);
5855
5856     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
5857              adj_nbr_db_size());
5858
5859     return (res);
5860 }
5861
5862 /*
5863  * Test Path Preference
5864  */
5865 static int
5866 fib_test_pref (void)
5867 {
5868     test_main_t *tm;
5869     ip4_main_t *im;
5870     int res, i;
5871
5872     tm = &test_main;
5873     im = &ip4_main;
5874     res = 0;
5875
5876     const fib_prefix_t pfx_1_1_1_1_s_32 = {
5877         .fp_len = 32,
5878         .fp_proto = FIB_PROTOCOL_IP4,
5879         .fp_addr = {
5880             .ip4 = {
5881                 .as_u32 = clib_host_to_net_u32(0x01010101),
5882             },
5883         },
5884     };
5885
5886     for (i = 0; i <= 2; i++)
5887         im->fib_index_by_sw_if_index[tm->hw[i]->sw_if_index] = 0;
5888
5889     /*
5890      * 2 high, 2 medium and 2 low preference non-recursive paths
5891      */
5892     fib_route_path_t nr_path_hi_1 = {
5893         .frp_proto = DPO_PROTO_IP4,
5894         .frp_sw_if_index = tm->hw[0]->sw_if_index,
5895         .frp_fib_index = ~0,
5896         .frp_weight = 1,
5897         .frp_preference = 0,
5898         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5899         .frp_addr = {
5900             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
5901         },
5902     };
5903     fib_route_path_t nr_path_hi_2 = {
5904         .frp_proto = DPO_PROTO_IP4,
5905         .frp_sw_if_index = tm->hw[0]->sw_if_index,
5906         .frp_fib_index = ~0,
5907         .frp_weight = 1,
5908         .frp_preference = 0,
5909         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5910         .frp_addr = {
5911             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
5912         },
5913     };
5914     fib_route_path_t nr_path_med_1 = {
5915         .frp_proto = DPO_PROTO_IP4,
5916         .frp_sw_if_index = tm->hw[1]->sw_if_index,
5917         .frp_fib_index = ~0,
5918         .frp_weight = 1,
5919         .frp_preference = 1,
5920         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5921         .frp_addr = {
5922             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0c01),
5923         },
5924     };
5925     fib_route_path_t nr_path_med_2 = {
5926         .frp_proto = DPO_PROTO_IP4,
5927         .frp_sw_if_index = tm->hw[1]->sw_if_index,
5928         .frp_fib_index = ~0,
5929         .frp_weight = 1,
5930         .frp_preference = 1,
5931         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5932         .frp_addr = {
5933             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0c01),
5934         },
5935     };
5936     fib_route_path_t nr_path_low_1 = {
5937         .frp_proto = DPO_PROTO_IP4,
5938         .frp_sw_if_index = tm->hw[2]->sw_if_index,
5939         .frp_fib_index = ~0,
5940         .frp_weight = 1,
5941         .frp_preference = 2,
5942         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5943         .frp_addr = {
5944             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0b01),
5945         },
5946     };
5947     fib_route_path_t nr_path_low_2 = {
5948         .frp_proto = DPO_PROTO_IP4,
5949         .frp_sw_if_index = tm->hw[2]->sw_if_index,
5950         .frp_fib_index = ~0,
5951         .frp_weight = 1,
5952         .frp_preference = 2,
5953         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
5954         .frp_addr = {
5955             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0b02),
5956         },
5957     };
5958     fib_route_path_t *nr_paths = NULL;
5959
5960     vec_add1(nr_paths, nr_path_hi_1);
5961     vec_add1(nr_paths, nr_path_hi_2);
5962     vec_add1(nr_paths, nr_path_med_1);
5963     vec_add1(nr_paths, nr_path_med_2);
5964     vec_add1(nr_paths, nr_path_low_1);
5965     vec_add1(nr_paths, nr_path_low_2);
5966
5967     adj_index_t ai_hi_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
5968                                               VNET_LINK_IP4,
5969                                               &nr_path_hi_1.frp_addr,
5970                                               nr_path_hi_1.frp_sw_if_index);
5971     adj_index_t ai_hi_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
5972                                               VNET_LINK_IP4,
5973                                               &nr_path_hi_2.frp_addr,
5974                                               nr_path_hi_2.frp_sw_if_index);
5975     adj_index_t ai_med_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
5976                                                VNET_LINK_IP4,
5977                                                &nr_path_med_1.frp_addr,
5978                                                nr_path_med_1.frp_sw_if_index);
5979     adj_index_t ai_med_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
5980                                                VNET_LINK_IP4,
5981                                                &nr_path_med_2.frp_addr,
5982                                                nr_path_med_2.frp_sw_if_index);
5983     adj_index_t ai_low_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
5984                                                VNET_LINK_IP4,
5985                                                &nr_path_low_1.frp_addr,
5986                                                nr_path_low_1.frp_sw_if_index);
5987     adj_index_t ai_low_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
5988                                                VNET_LINK_IP4,
5989                                                &nr_path_low_2.frp_addr,
5990                                                nr_path_low_2.frp_sw_if_index);
5991
5992     fib_test_lb_bucket_t ip_hi_1 = {
5993         .type = FT_LB_ADJ,
5994         .adj = {
5995             .adj = ai_hi_1,
5996         },
5997     };
5998     fib_test_lb_bucket_t ip_hi_2 = {
5999         .type = FT_LB_ADJ,
6000         .adj = {
6001             .adj = ai_hi_2,
6002         },
6003     };
6004     fib_test_lb_bucket_t ip_med_1 = {
6005         .type = FT_LB_ADJ,
6006         .adj = {
6007             .adj = ai_med_1,
6008         },
6009     };
6010     fib_test_lb_bucket_t ip_med_2 = {
6011         .type = FT_LB_ADJ,
6012         .adj = {
6013             .adj = ai_med_2,
6014         },
6015     };
6016     fib_test_lb_bucket_t ip_low_1 = {
6017         .type = FT_LB_ADJ,
6018         .adj = {
6019             .adj = ai_low_1,
6020         },
6021     };
6022     fib_test_lb_bucket_t ip_low_2 = {
6023         .type = FT_LB_ADJ,
6024         .adj = {
6025             .adj = ai_low_2,
6026         },
6027     };
6028
6029     fib_node_index_t fei;
6030
6031     fei = fib_table_entry_path_add2(0,
6032                                     &pfx_1_1_1_1_s_32,
6033                                     FIB_SOURCE_API,
6034                                     FIB_ENTRY_FLAG_NONE,
6035                                     nr_paths);
6036
6037     FIB_TEST(!fib_test_validate_entry(fei,
6038                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6039                                       2,
6040                                       &ip_hi_1,
6041                                       &ip_hi_2),
6042              "1.1.1.1/32 via high preference paths");
6043
6044     /*
6045      * bring down the interface on which the high preference path lie
6046      */
6047     vnet_sw_interface_set_flags(vnet_get_main(),
6048                                 tm->hw[0]->sw_if_index,
6049                                 0);
6050
6051     FIB_TEST(!fib_test_validate_entry(fei,
6052                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6053                                       2,
6054                                       &ip_med_1,
6055                                       &ip_med_2),
6056              "1.1.1.1/32 via medium preference paths");
6057
6058     /*
6059      * bring down the interface on which the medium preference path lie
6060      */
6061     vnet_sw_interface_set_flags(vnet_get_main(),
6062                                 tm->hw[1]->sw_if_index,
6063                                 0);
6064
6065     FIB_TEST(!fib_test_validate_entry(fei,
6066                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6067                                       2,
6068                                       &ip_low_1,
6069                                       &ip_low_2),
6070              "1.1.1.1/32 via low preference paths");
6071
6072     /*
6073      * bring up the interface on which the high preference path lie
6074      */
6075     vnet_sw_interface_set_flags(vnet_get_main(),
6076                                 tm->hw[0]->sw_if_index,
6077                                 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
6078
6079     FIB_TEST(!fib_test_validate_entry(fei,
6080                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6081                                       2,
6082                                       &ip_hi_1,
6083                                       &ip_hi_2),
6084              "1.1.1.1/32 via high preference paths");
6085
6086     /*
6087      * bring up the interface on which the medium preference path lie
6088      */
6089     vnet_sw_interface_set_flags(vnet_get_main(),
6090                                 tm->hw[1]->sw_if_index,
6091                                 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
6092
6093     FIB_TEST(!fib_test_validate_entry(fei,
6094                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6095                                       2,
6096                                       &ip_hi_1,
6097                                       &ip_hi_2),
6098              "1.1.1.1/32 via high preference paths");
6099
6100     dpo_id_t ip_1_1_1_1 = DPO_INVALID;
6101     fib_entry_contribute_forwarding(fei,
6102                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6103                                     &ip_1_1_1_1);
6104
6105     /*
6106      * 3 recursive paths of different preference
6107      */
6108     const fib_prefix_t pfx_1_1_1_2_s_32 = {
6109         .fp_len = 32,
6110         .fp_proto = FIB_PROTOCOL_IP4,
6111         .fp_addr = {
6112             .ip4 = {
6113                 .as_u32 = clib_host_to_net_u32(0x01010102),
6114             },
6115         },
6116     };
6117     const fib_prefix_t pfx_1_1_1_3_s_32 = {
6118         .fp_len = 32,
6119         .fp_proto = FIB_PROTOCOL_IP4,
6120         .fp_addr = {
6121             .ip4 = {
6122                 .as_u32 = clib_host_to_net_u32(0x01010103),
6123             },
6124         },
6125     };
6126     fei = fib_table_entry_path_add2(0,
6127                                     &pfx_1_1_1_2_s_32,
6128                                     FIB_SOURCE_API,
6129                                     FIB_ENTRY_FLAG_NONE,
6130                                     nr_paths);
6131     dpo_id_t ip_1_1_1_2 = DPO_INVALID;
6132     fib_entry_contribute_forwarding(fei,
6133                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6134                                     &ip_1_1_1_2);
6135     fei = fib_table_entry_path_add2(0,
6136                                     &pfx_1_1_1_3_s_32,
6137                                     FIB_SOURCE_API,
6138                                     FIB_ENTRY_FLAG_NONE,
6139                                     nr_paths);
6140     dpo_id_t ip_1_1_1_3 = DPO_INVALID;
6141     fib_entry_contribute_forwarding(fei,
6142                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6143                                     &ip_1_1_1_3);
6144
6145     fib_test_lb_bucket_t ip_o_1_1_1_1 = {
6146         .type = FT_LB_O_LB,
6147         .lb = {
6148             .lb = ip_1_1_1_1.dpoi_index,
6149         },
6150     };
6151     fib_test_lb_bucket_t ip_o_1_1_1_2 = {
6152         .type = FT_LB_O_LB,
6153         .lb = {
6154             .lb = ip_1_1_1_2.dpoi_index,
6155         },
6156     };
6157     fib_test_lb_bucket_t ip_o_1_1_1_3 = {
6158         .type = FT_LB_O_LB,
6159         .lb = {
6160             .lb = ip_1_1_1_3.dpoi_index,
6161         },
6162     };
6163     fib_route_path_t r_path_hi = {
6164         .frp_proto = DPO_PROTO_IP4,
6165         .frp_sw_if_index = ~0,
6166         .frp_fib_index = 0,
6167         .frp_weight = 1,
6168         .frp_preference = 0,
6169         .frp_flags = FIB_ROUTE_PATH_RESOLVE_VIA_HOST,
6170         .frp_addr = pfx_1_1_1_1_s_32.fp_addr,
6171     };
6172     fib_route_path_t r_path_med = {
6173         .frp_proto = DPO_PROTO_IP4,
6174         .frp_sw_if_index = ~0,
6175         .frp_fib_index = 0,
6176         .frp_weight = 1,
6177         .frp_preference = 10,
6178         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
6179         .frp_addr = pfx_1_1_1_2_s_32.fp_addr,
6180     };
6181     fib_route_path_t r_path_low = {
6182         .frp_proto = DPO_PROTO_IP4,
6183         .frp_sw_if_index = ~0,
6184         .frp_fib_index = 0,
6185         .frp_weight = 1,
6186         .frp_preference = 255,
6187         .frp_flags = FIB_ROUTE_PATH_RESOLVE_VIA_HOST,
6188         .frp_addr = pfx_1_1_1_3_s_32.fp_addr,
6189     };
6190     fib_route_path_t *r_paths = NULL;
6191
6192     vec_add1(r_paths, r_path_hi);
6193     vec_add1(r_paths, r_path_low);
6194     vec_add1(r_paths, r_path_med);
6195
6196     /*
6197      * add many recursive so we get the LB MAp created
6198      */
6199 #define N_PFXS 64
6200     fib_prefix_t pfx_r[N_PFXS];
6201     unsigned int n_pfxs;
6202     for (n_pfxs = 0; n_pfxs < N_PFXS; n_pfxs++)
6203     {
6204         pfx_r[n_pfxs].fp_len = 32;
6205         pfx_r[n_pfxs].fp_proto = FIB_PROTOCOL_IP4;
6206         pfx_r[n_pfxs].fp_addr.ip4.as_u32 =
6207             clib_host_to_net_u32(0x02000000 + n_pfxs);
6208
6209         fei = fib_table_entry_path_add2(0,
6210                                         &pfx_r[n_pfxs],
6211                                         FIB_SOURCE_API,
6212                                         FIB_ENTRY_FLAG_NONE,
6213                                         r_paths);
6214
6215         FIB_TEST(!fib_test_validate_entry(fei,
6216                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6217                                           1,
6218                                           &ip_o_1_1_1_1),
6219                  "recursive via high preference paths");
6220
6221         /*
6222          * withdraw hig pref resolving entry
6223          */
6224         fib_table_entry_delete(0,
6225                                &pfx_1_1_1_1_s_32,
6226                                FIB_SOURCE_API);
6227
6228         /* suspend so the update walk kicks int */
6229         vlib_process_suspend(vlib_get_main(), 1e-5);
6230
6231         FIB_TEST(!fib_test_validate_entry(fei,
6232                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6233                                           1,
6234                                           &ip_o_1_1_1_2),
6235                  "recursive via medium preference paths");
6236
6237         /*
6238          * withdraw medium pref resolving entry
6239          */
6240         fib_table_entry_delete(0,
6241                                &pfx_1_1_1_2_s_32,
6242                                FIB_SOURCE_API);
6243
6244         /* suspend so the update walk kicks int */
6245         vlib_process_suspend(vlib_get_main(), 1e-5);
6246
6247         FIB_TEST(!fib_test_validate_entry(fei,
6248                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6249                                           1,
6250                                           &ip_o_1_1_1_3),
6251                  "recursive via low preference paths");
6252
6253         /*
6254          * add back paths for next iteration
6255          */
6256         fei = fib_table_entry_update(0,
6257                                      &pfx_1_1_1_2_s_32,
6258                                      FIB_SOURCE_API,
6259                                      FIB_ENTRY_FLAG_NONE,
6260                                      nr_paths);
6261         fei = fib_table_entry_update(0,
6262                                      &pfx_1_1_1_1_s_32,
6263                                      FIB_SOURCE_API,
6264                                      FIB_ENTRY_FLAG_NONE,
6265                                      nr_paths);
6266
6267         /* suspend so the update walk kicks int */
6268         vlib_process_suspend(vlib_get_main(), 1e-5);
6269
6270         fei = fib_table_lookup_exact_match(0, &pfx_r[n_pfxs]);
6271         FIB_TEST(!fib_test_validate_entry(fei,
6272                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6273                                           1,
6274                                           &ip_o_1_1_1_1),
6275                  "recursive via high preference paths");
6276     }
6277
6278
6279     fib_table_entry_delete(0,
6280                            &pfx_1_1_1_1_s_32,
6281                            FIB_SOURCE_API);
6282
6283     /* suspend so the update walk kicks int */
6284     vlib_process_suspend(vlib_get_main(), 1e-5);
6285
6286     for (n_pfxs = 0; n_pfxs < N_PFXS; n_pfxs++)
6287     {
6288         fei = fib_table_lookup_exact_match(0, &pfx_r[n_pfxs]);
6289
6290         FIB_TEST(!fib_test_validate_entry(fei,
6291                                           FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6292                                           1,
6293                                           &ip_o_1_1_1_2),
6294                  "recursive via medium preference paths");
6295     }
6296     for (n_pfxs = 0; n_pfxs < N_PFXS; n_pfxs++)
6297     {
6298         fib_table_entry_delete(0,
6299                                &pfx_r[n_pfxs],
6300                                FIB_SOURCE_API);
6301     }
6302
6303     /*
6304      * Cleanup
6305      */
6306     fib_table_entry_delete(0,
6307                            &pfx_1_1_1_2_s_32,
6308                            FIB_SOURCE_API);
6309     fib_table_entry_delete(0,
6310                            &pfx_1_1_1_3_s_32,
6311                            FIB_SOURCE_API);
6312
6313     dpo_reset(&ip_1_1_1_1);
6314     dpo_reset(&ip_1_1_1_2);
6315     dpo_reset(&ip_1_1_1_3);
6316     adj_unlock(ai_low_2);
6317     adj_unlock(ai_low_1);
6318     adj_unlock(ai_med_2);
6319     adj_unlock(ai_med_1);
6320     adj_unlock(ai_hi_2);
6321     adj_unlock(ai_hi_1);
6322
6323     return (res);
6324 }
6325
6326 /*
6327  * Test the recursive route route handling for GRE tunnels
6328  */
6329 static int
6330 fib_test_label (void)
6331 {
6332     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;
6333     const u32 fib_index = 0;
6334     int lb_count, ii, res;
6335     test_main_t *tm;
6336     ip4_main_t *im;
6337
6338     res = 0;
6339     lb_count = pool_elts(load_balance_pool);
6340     tm = &test_main;
6341     im = &ip4_main;
6342
6343     /*
6344      * add interface routes. We'll assume this works. It's more rigorously
6345      * tested elsewhere.
6346      */
6347     fib_prefix_t local0_pfx = {
6348         .fp_len = 24,
6349         .fp_proto = FIB_PROTOCOL_IP4,
6350         .fp_addr = {
6351             .ip4 = {
6352                 /* 10.10.10.10 */
6353                 .as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
6354             },
6355         },
6356     };
6357
6358     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
6359              adj_nbr_db_size());
6360
6361     im->fib_index_by_sw_if_index[tm->hw[0]->sw_if_index] = fib_index;
6362
6363     fib_table_entry_update_one_path(fib_index, &local0_pfx,
6364                                     FIB_SOURCE_INTERFACE,
6365                                     (FIB_ENTRY_FLAG_CONNECTED |
6366                                      FIB_ENTRY_FLAG_ATTACHED),
6367                                     DPO_PROTO_IP4,
6368                                     NULL,
6369                                     tm->hw[0]->sw_if_index,
6370                                     ~0,
6371                                     1,
6372                                     NULL,
6373                                     FIB_ROUTE_PATH_FLAG_NONE);
6374     fei = fib_table_lookup_exact_match(fib_index, &local0_pfx);
6375     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
6376              "attached interface route present");
6377
6378     local0_pfx.fp_len = 32;
6379     fib_table_entry_update_one_path(fib_index, &local0_pfx,
6380                                     FIB_SOURCE_INTERFACE,
6381                                     (FIB_ENTRY_FLAG_CONNECTED |
6382                                      FIB_ENTRY_FLAG_LOCAL),
6383                                     DPO_PROTO_IP4,
6384                                     NULL,
6385                                     tm->hw[0]->sw_if_index,
6386                                     ~0, // invalid fib index
6387                                     1,
6388                                     NULL,
6389                                     FIB_ROUTE_PATH_FLAG_NONE);
6390     fei = fib_table_lookup_exact_match(fib_index, &local0_pfx);
6391
6392     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
6393              "local interface route present");
6394
6395     fib_prefix_t local1_pfx = {
6396         .fp_len = 24,
6397         .fp_proto = FIB_PROTOCOL_IP4,
6398         .fp_addr = {
6399             .ip4 = {
6400                 /* 10.10.11.10 */
6401                 .as_u32 = clib_host_to_net_u32(0x0a0a0b0a),
6402             },
6403         },
6404     };
6405
6406     im->fib_index_by_sw_if_index[tm->hw[1]->sw_if_index] = fib_index;
6407
6408     fib_table_entry_update_one_path(fib_index, &local1_pfx,
6409                                     FIB_SOURCE_INTERFACE,
6410                                     (FIB_ENTRY_FLAG_CONNECTED |
6411                                      FIB_ENTRY_FLAG_ATTACHED),
6412                                     DPO_PROTO_IP4,
6413                                     NULL,
6414                                     tm->hw[1]->sw_if_index,
6415                                     ~0,
6416                                     1,
6417                                     NULL,
6418                                     FIB_ROUTE_PATH_FLAG_NONE);
6419     fei = fib_table_lookup_exact_match(fib_index, &local1_pfx);
6420     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
6421              "attached interface route present");
6422
6423     local1_pfx.fp_len = 32;
6424     fib_table_entry_update_one_path(fib_index, &local1_pfx,
6425                                     FIB_SOURCE_INTERFACE,
6426                                     (FIB_ENTRY_FLAG_CONNECTED |
6427                                      FIB_ENTRY_FLAG_LOCAL),
6428                                     DPO_PROTO_IP4,
6429                                     NULL,
6430                                     tm->hw[1]->sw_if_index,
6431                                     ~0, // invalid fib index
6432                                     1,
6433                                     NULL,
6434                                     FIB_ROUTE_PATH_FLAG_NONE);
6435     fei = fib_table_lookup_exact_match(fib_index, &local1_pfx);
6436
6437     FIB_TEST((FIB_NODE_INDEX_INVALID != fei),
6438              "local interface route present");
6439
6440     ip46_address_t nh_10_10_10_1 = {
6441         .ip4 = {
6442             .as_u32 = clib_host_to_net_u32(0x0a0a0a01),
6443         },
6444     };
6445     ip46_address_t nh_10_10_11_1 = {
6446         .ip4 = {
6447             .as_u32 = clib_host_to_net_u32(0x0a0a0b01),
6448         },
6449     };
6450     ip46_address_t nh_10_10_11_2 = {
6451         .ip4 = {
6452             .as_u32 = clib_host_to_net_u32(0x0a0a0b02),
6453         },
6454     };
6455
6456     ai_v4_10_10_11_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6457                                            VNET_LINK_IP4,
6458                                            &nh_10_10_11_1,
6459                                            tm->hw[1]->sw_if_index);
6460     ai_v4_10_10_11_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6461                                            VNET_LINK_IP4,
6462                                            &nh_10_10_11_2,
6463                                            tm->hw[1]->sw_if_index);
6464     ai_mpls_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6465                                              VNET_LINK_MPLS,
6466                                              &nh_10_10_10_1,
6467                                              tm->hw[0]->sw_if_index);
6468     ai_mpls_10_10_11_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6469                                              VNET_LINK_MPLS,
6470                                              &nh_10_10_11_2,
6471                                              tm->hw[1]->sw_if_index);
6472     ai_mpls_10_10_11_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
6473                                              VNET_LINK_MPLS,
6474                                              &nh_10_10_11_1,
6475                                              tm->hw[1]->sw_if_index);
6476
6477     /*
6478      * Add an etry with one path with a real out-going label
6479      */
6480     fib_prefix_t pfx_1_1_1_1_s_32 = {
6481         .fp_len = 32,
6482         .fp_proto = FIB_PROTOCOL_IP4,
6483         .fp_addr = {
6484             .ip4.as_u32 = clib_host_to_net_u32(0x01010101),
6485         },
6486     };
6487     fib_test_lb_bucket_t l99_eos_o_10_10_10_1 = {
6488         .type = FT_LB_LABEL_O_ADJ,
6489         .label_o_adj = {
6490             .adj = ai_mpls_10_10_10_1,
6491             .label = 99,
6492             .eos = MPLS_EOS,
6493         },
6494     };
6495     fib_test_lb_bucket_t l99_neos_o_10_10_10_1 = {
6496         .type = FT_LB_LABEL_O_ADJ,
6497         .label_o_adj = {
6498             .adj = ai_mpls_10_10_10_1,
6499             .label = 99,
6500             .eos = MPLS_NON_EOS,
6501         },
6502     };
6503     fib_mpls_label_t *l99 = NULL, fml99 = {
6504         .fml_value = 99,
6505     };
6506     vec_add1(l99, fml99);
6507
6508     fib_table_entry_update_one_path(fib_index,
6509                                     &pfx_1_1_1_1_s_32,
6510                                     FIB_SOURCE_API,
6511                                     FIB_ENTRY_FLAG_NONE,
6512                                     DPO_PROTO_IP4,
6513                                     &nh_10_10_10_1,
6514                                     tm->hw[0]->sw_if_index,
6515                                     ~0, // invalid fib index
6516                                     1,
6517                                     l99,
6518                                     FIB_ROUTE_PATH_FLAG_NONE);
6519
6520     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6521     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "1.1.1.1/32 created");
6522
6523     FIB_TEST(!fib_test_validate_entry(fei,
6524                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6525                                       1,
6526                                       &l99_eos_o_10_10_10_1),
6527              "1.1.1.1/32 LB 1 bucket via label 99 over 10.10.10.1");
6528
6529     /*
6530      * add a path with an implicit NULL label
6531      */
6532     fib_test_lb_bucket_t a_o_10_10_11_1 = {
6533         .type = FT_LB_ADJ,
6534         .adj = {
6535             .adj = ai_v4_10_10_11_1,
6536         },
6537     };
6538     fib_test_lb_bucket_t a_mpls_o_10_10_11_1 = {
6539         .type = FT_LB_ADJ,
6540         .adj = {
6541             .adj = ai_mpls_10_10_11_1,
6542         },
6543     };
6544     fib_mpls_label_t *l_imp_null = NULL, fml_imp_null = {
6545         .fml_value =  MPLS_IETF_IMPLICIT_NULL_LABEL,
6546     };
6547     vec_add1(l_imp_null, fml_imp_null);
6548
6549     fei = fib_table_entry_path_add(fib_index,
6550                                    &pfx_1_1_1_1_s_32,
6551                                    FIB_SOURCE_API,
6552                                    FIB_ENTRY_FLAG_NONE,
6553                                    DPO_PROTO_IP4,
6554                                    &nh_10_10_11_1,
6555                                    tm->hw[1]->sw_if_index,
6556                                    ~0, // invalid fib index
6557                                    1,
6558                                    l_imp_null,
6559                                    FIB_ROUTE_PATH_FLAG_NONE);
6560
6561     FIB_TEST(!fib_test_validate_entry(fei,
6562                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6563                                       2,
6564                                       &l99_eos_o_10_10_10_1,
6565                                       &a_o_10_10_11_1),
6566              "1.1.1.1/32 LB 2 buckets via: "
6567              "label 99 over 10.10.10.1, "
6568              "adj over 10.10.11.1");
6569
6570     /*
6571      * assign the route a local label
6572      */
6573     fib_table_entry_local_label_add(fib_index,
6574                                     &pfx_1_1_1_1_s_32,
6575                                     24001);
6576
6577     fib_prefix_t pfx_24001_eos = {
6578         .fp_proto = FIB_PROTOCOL_MPLS,
6579         .fp_label = 24001,
6580         .fp_eos = MPLS_EOS,
6581     };
6582     fib_prefix_t pfx_24001_neos = {
6583         .fp_proto = FIB_PROTOCOL_MPLS,
6584         .fp_label = 24001,
6585         .fp_eos = MPLS_NON_EOS,
6586     };
6587     fib_test_lb_bucket_t disp_o_10_10_11_1 = {
6588         .type = FT_LB_MPLS_DISP_PIPE_O_ADJ,
6589         .adj = {
6590             .adj = ai_v4_10_10_11_1,
6591         },
6592     };
6593
6594     /*
6595      * The EOS entry should link to both the paths,
6596      *  and use an ip adj for the imp-null
6597      * The NON-EOS entry should link to both the paths,
6598      *  and use an mpls adj for the imp-null
6599      */
6600     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6601                            &pfx_24001_eos);
6602     FIB_TEST(!fib_test_validate_entry(fei,
6603                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
6604                                       2,
6605                                       &l99_eos_o_10_10_10_1,
6606                                       &disp_o_10_10_11_1),
6607              "24001/eos LB 2 buckets via: "
6608              "label 99 over 10.10.10.1, "
6609              "mpls disp adj over 10.10.11.1");
6610
6611
6612     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6613                            &pfx_24001_neos);
6614     FIB_TEST(!fib_test_validate_entry(fei,
6615                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6616                                       2,
6617                                       &l99_neos_o_10_10_10_1,
6618                                       &a_mpls_o_10_10_11_1),
6619              "24001/neos LB 1 bucket via: "
6620              "label 99 over 10.10.10.1 ",
6621              "mpls-adj via 10.10.11.1");
6622
6623     /*
6624      * add an unlabelled path, this is excluded from the neos chains,
6625      */
6626     fib_test_lb_bucket_t adj_o_10_10_11_2 = {
6627         .type = FT_LB_ADJ,
6628         .adj = {
6629             .adj = ai_v4_10_10_11_2,
6630         },
6631     };
6632     fib_test_lb_bucket_t disp_o_10_10_11_2 = {
6633         .type = FT_LB_MPLS_DISP_PIPE_O_ADJ,
6634         .adj = {
6635             .adj = ai_v4_10_10_11_2,
6636         },
6637     };
6638
6639
6640     fei = fib_table_entry_path_add(fib_index,
6641                                    &pfx_1_1_1_1_s_32,
6642                                    FIB_SOURCE_API,
6643                                    FIB_ENTRY_FLAG_NONE,
6644                                    DPO_PROTO_IP4,
6645                                    &nh_10_10_11_2,
6646                                    tm->hw[1]->sw_if_index,
6647                                    ~0, // invalid fib index
6648                                    1,
6649                                    NULL,
6650                                    FIB_ROUTE_PATH_FLAG_NONE);
6651
6652     FIB_TEST(!fib_test_validate_entry(fei,
6653                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6654                                       16, // 3 choices spread over 16 buckets
6655                                       &l99_eos_o_10_10_10_1,
6656                                       &l99_eos_o_10_10_10_1,
6657                                       &l99_eos_o_10_10_10_1,
6658                                       &l99_eos_o_10_10_10_1,
6659                                       &l99_eos_o_10_10_10_1,
6660                                       &l99_eos_o_10_10_10_1,
6661                                       &a_o_10_10_11_1,
6662                                       &a_o_10_10_11_1,
6663                                       &a_o_10_10_11_1,
6664                                       &a_o_10_10_11_1,
6665                                       &a_o_10_10_11_1,
6666                                       &adj_o_10_10_11_2,
6667                                       &adj_o_10_10_11_2,
6668                                       &adj_o_10_10_11_2,
6669                                       &adj_o_10_10_11_2,
6670                                       &adj_o_10_10_11_2),
6671              "1.1.1.1/32 LB 16 buckets via: "
6672              "label 99 over 10.10.10.1, "
6673              "adj over 10.10.11.1",
6674              "adj over 10.10.11.2");
6675
6676     /*
6677      * get and lock a reference to the non-eos of the via entry 1.1.1.1/32
6678      */
6679     dpo_id_t non_eos_1_1_1_1 = DPO_INVALID;
6680     fib_entry_contribute_forwarding(fei,
6681                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6682                                     &non_eos_1_1_1_1);
6683
6684     /*
6685      * n-eos has only the 2 labelled paths
6686      */
6687     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6688                            &pfx_24001_neos);
6689
6690     FIB_TEST(!fib_test_validate_entry(fei,
6691                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6692                                       2,
6693                                       &l99_neos_o_10_10_10_1,
6694                                       &a_mpls_o_10_10_11_1),
6695              "24001/neos LB 2 buckets via: "
6696              "label 99 over 10.10.10.1, "
6697              "adj-mpls over 10.10.11.2");
6698
6699     /*
6700      * A labelled recursive
6701      */
6702     fib_prefix_t pfx_2_2_2_2_s_32 = {
6703         .fp_len = 32,
6704         .fp_proto = FIB_PROTOCOL_IP4,
6705         .fp_addr = {
6706             .ip4.as_u32 = clib_host_to_net_u32(0x02020202),
6707         },
6708     };
6709     fib_test_lb_bucket_t l1600_eos_o_1_1_1_1 = {
6710         .type = FT_LB_LABEL_O_LB,
6711         .label_o_lb = {
6712             .lb = non_eos_1_1_1_1.dpoi_index,
6713             .label = 1600,
6714             .eos = MPLS_EOS,
6715             .mode = FIB_MPLS_LSP_MODE_UNIFORM,
6716         },
6717     };
6718     fib_mpls_label_t *l1600 = NULL, fml1600 = {
6719         .fml_value = 1600,
6720         .fml_mode = FIB_MPLS_LSP_MODE_UNIFORM,
6721     };
6722     vec_add1(l1600, fml1600);
6723
6724     fei = fib_table_entry_update_one_path(fib_index,
6725                                           &pfx_2_2_2_2_s_32,
6726                                           FIB_SOURCE_API,
6727                                           FIB_ENTRY_FLAG_NONE,
6728                                           DPO_PROTO_IP4,
6729                                           &pfx_1_1_1_1_s_32.fp_addr,
6730                                           ~0,
6731                                           fib_index,
6732                                           1,
6733                                           l1600,
6734                                           FIB_ROUTE_PATH_FLAG_NONE);
6735
6736     FIB_TEST(!fib_test_validate_entry(fei,
6737                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6738                                       1,
6739                                       &l1600_eos_o_1_1_1_1),
6740              "2.2.2.2.2/32 LB 1 buckets via: "
6741              "label 1600 over 1.1.1.1");
6742
6743     dpo_id_t dpo_44 = DPO_INVALID;
6744     index_t urpfi;
6745
6746     fib_entry_contribute_forwarding(fei, FIB_FORW_CHAIN_TYPE_UNICAST_IP4, &dpo_44);
6747     urpfi = load_balance_get_urpf(dpo_44.dpoi_index);
6748
6749     FIB_TEST(fib_urpf_check(urpfi, tm->hw[0]->sw_if_index),
6750              "uRPF check for 2.2.2.2/32 on %d OK",
6751              tm->hw[0]->sw_if_index);
6752     FIB_TEST(fib_urpf_check(urpfi, tm->hw[1]->sw_if_index),
6753              "uRPF check for 2.2.2.2/32 on %d OK",
6754              tm->hw[1]->sw_if_index);
6755     FIB_TEST(!fib_urpf_check(urpfi, 99),
6756              "uRPF check for 2.2.2.2/32 on 99 not-OK",
6757              99);
6758
6759     fib_entry_contribute_forwarding(fei, FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS, &dpo_44);
6760     FIB_TEST(urpfi == load_balance_get_urpf(dpo_44.dpoi_index),
6761              "Shared uRPF on IP and non-EOS chain");
6762
6763     dpo_reset(&dpo_44);
6764
6765     /*
6766      * we are holding a lock on the non-eos LB of the via-entry.
6767      * do a PIC-core failover by shutting the link of the via-entry.
6768      *
6769      * shut down the link with the valid label
6770      */
6771     vnet_sw_interface_set_flags(vnet_get_main(),
6772                                 tm->hw[0]->sw_if_index,
6773                                 0);
6774
6775     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6776     FIB_TEST(!fib_test_validate_entry(fei,
6777                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6778                                       2,
6779                                       &a_o_10_10_11_1,
6780                                       &adj_o_10_10_11_2),
6781              "1.1.1.1/32 LB 2 buckets via: "
6782              "adj over 10.10.11.1, ",
6783              "adj-v4 over 10.10.11.2");
6784
6785     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6786                            &pfx_24001_eos);
6787     FIB_TEST(!fib_test_validate_entry(fei,
6788                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
6789                                       2,
6790                                       &disp_o_10_10_11_1,
6791                                       &disp_o_10_10_11_2),
6792              "24001/eos LB 2 buckets via: "
6793              "mpls-disp adj over 10.10.11.1, ",
6794              "mpls-disp adj-v4 over 10.10.11.2");
6795
6796     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6797                            &pfx_24001_neos);
6798     FIB_TEST(!fib_test_validate_entry(fei,
6799                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6800                                       1,
6801                                       &a_mpls_o_10_10_11_1),
6802              "24001/neos LB 1 buckets via: "
6803              "adj-mpls over 10.10.11.2");
6804
6805     /*
6806      * test that the pre-failover load-balance has been in-place
6807      * modified
6808      */
6809     dpo_id_t current = DPO_INVALID;
6810     fib_entry_contribute_forwarding(fei,
6811                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6812                                     &current);
6813
6814     FIB_TEST(!dpo_cmp(&non_eos_1_1_1_1,
6815                       &current),
6816              "PIC-core LB inplace modified %U %U",
6817              format_dpo_id, &non_eos_1_1_1_1, 0,
6818              format_dpo_id, &current, 0);
6819
6820     dpo_reset(&non_eos_1_1_1_1);
6821     dpo_reset(&current);
6822
6823     /*
6824      * no-shut the link with the valid label
6825      */
6826     vnet_sw_interface_set_flags(vnet_get_main(),
6827                                 tm->hw[0]->sw_if_index,
6828                                 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
6829
6830     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6831     FIB_TEST(!fib_test_validate_entry(fei,
6832                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6833                                       16, // 3 choices spread over 16 buckets
6834                                       &l99_eos_o_10_10_10_1,
6835                                       &l99_eos_o_10_10_10_1,
6836                                       &l99_eos_o_10_10_10_1,
6837                                       &l99_eos_o_10_10_10_1,
6838                                       &l99_eos_o_10_10_10_1,
6839                                       &l99_eos_o_10_10_10_1,
6840                                       &a_o_10_10_11_1,
6841                                       &a_o_10_10_11_1,
6842                                       &a_o_10_10_11_1,
6843                                       &a_o_10_10_11_1,
6844                                       &a_o_10_10_11_1,
6845                                       &adj_o_10_10_11_2,
6846                                       &adj_o_10_10_11_2,
6847                                       &adj_o_10_10_11_2,
6848                                       &adj_o_10_10_11_2,
6849                                       &adj_o_10_10_11_2),
6850              "1.1.1.1/32 LB 16 buckets via: "
6851              "label 99 over 10.10.10.1, "
6852              "adj over 10.10.11.1",
6853              "adj-v4 over 10.10.11.2");
6854
6855
6856     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6857                            &pfx_24001_eos);
6858     FIB_TEST(!fib_test_validate_entry(fei,
6859                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
6860                                       16, // 3 choices spread over 16 buckets
6861                                       &l99_eos_o_10_10_10_1,
6862                                       &l99_eos_o_10_10_10_1,
6863                                       &l99_eos_o_10_10_10_1,
6864                                       &l99_eos_o_10_10_10_1,
6865                                       &l99_eos_o_10_10_10_1,
6866                                       &l99_eos_o_10_10_10_1,
6867                                       &disp_o_10_10_11_1,
6868                                       &disp_o_10_10_11_1,
6869                                       &disp_o_10_10_11_1,
6870                                       &disp_o_10_10_11_1,
6871                                       &disp_o_10_10_11_1,
6872                                       &disp_o_10_10_11_2,
6873                                       &disp_o_10_10_11_2,
6874                                       &disp_o_10_10_11_2,
6875                                       &disp_o_10_10_11_2,
6876                                       &disp_o_10_10_11_2),
6877              "24001/eos LB 16 buckets via: "
6878              "label 99 over 10.10.10.1, "
6879              "MPLS disp adj over 10.10.11.1",
6880              "MPLS disp adj-v4 over 10.10.11.2");
6881
6882     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6883                            &pfx_24001_neos);
6884     FIB_TEST(!fib_test_validate_entry(fei,
6885                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6886                                       2,
6887                                       &l99_neos_o_10_10_10_1,
6888                                       &a_mpls_o_10_10_11_1),
6889              "24001/neos LB 2 buckets via: "
6890              "label 99 over 10.10.10.1, "
6891              "adj-mpls over 10.10.11.2");
6892
6893     /*
6894      * remove the first path with the valid label
6895      */
6896     fib_table_entry_path_remove(fib_index,
6897                                 &pfx_1_1_1_1_s_32,
6898                                 FIB_SOURCE_API,
6899                                 DPO_PROTO_IP4,
6900                                 &nh_10_10_10_1,
6901                                 tm->hw[0]->sw_if_index,
6902                                 ~0, // invalid fib index
6903                                 1,
6904                                 FIB_ROUTE_PATH_FLAG_NONE);
6905
6906     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6907     FIB_TEST(!fib_test_validate_entry(fei,
6908                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6909                                       2,
6910                                       &a_o_10_10_11_1,
6911                                       &adj_o_10_10_11_2),
6912              "1.1.1.1/32 LB 2 buckets via: "
6913              "adj over 10.10.11.1, "
6914              "adj-v4 over 10.10.11.2");
6915
6916     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6917                            &pfx_24001_eos);
6918     FIB_TEST(!fib_test_validate_entry(fei,
6919                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
6920                                       2,
6921                                       &disp_o_10_10_11_1,
6922                                       &disp_o_10_10_11_2),
6923              "24001/eos LB 2 buckets via: "
6924              "MPLS disp adj over 10.10.11.1, "
6925              "MPLS disp adj-v4 over 10.10.11.2");
6926
6927     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6928                            &pfx_24001_neos);
6929
6930     FIB_TEST(!fib_test_validate_entry(fei,
6931                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6932                                       1,
6933                                       &a_mpls_o_10_10_11_1),
6934              "24001/neos LB 1 buckets via: "
6935              "adj-mpls over 10.10.11.2");
6936
6937     /*
6938      * remove the other path with a valid label
6939      */
6940     fib_test_lb_bucket_t bucket_drop = {
6941         .type = FT_LB_DROP,
6942     };
6943     fib_test_lb_bucket_t mpls_bucket_drop = {
6944         .type = FT_LB_DROP,
6945         .special = {
6946             .adj = DPO_PROTO_MPLS,
6947         },
6948     };
6949
6950     fib_table_entry_path_remove(fib_index,
6951                                 &pfx_1_1_1_1_s_32,
6952                                 FIB_SOURCE_API,
6953                                 DPO_PROTO_IP4,
6954                                 &nh_10_10_11_1,
6955                                 tm->hw[1]->sw_if_index,
6956                                 ~0, // invalid fib index
6957                                 1,
6958                                 FIB_ROUTE_PATH_FLAG_NONE);
6959
6960     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
6961     FIB_TEST(!fib_test_validate_entry(fei,
6962                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
6963                                       1,
6964                                       &adj_o_10_10_11_2),
6965              "1.1.1.1/32 LB 1 buckets via: "
6966              "adj over 10.10.11.2");
6967
6968     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6969                            &pfx_24001_eos);
6970     FIB_TEST(!fib_test_validate_entry(fei,
6971                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
6972                                       1,
6973                                       &disp_o_10_10_11_2),
6974              "24001/eos LB 1 buckets via: "
6975              "MPLS disp adj over 10.10.11.2");
6976
6977     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
6978                            &pfx_24001_neos);
6979     FIB_TEST(!fib_test_validate_entry(fei,
6980                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
6981                                       1,
6982                                       &mpls_bucket_drop),
6983              "24001/neos LB 1 buckets via: DROP");
6984
6985     /*
6986      * add back the path with the valid label
6987      */
6988     l99 = NULL;
6989     vec_add1(l99, fml99);
6990
6991     fib_table_entry_path_add(fib_index,
6992                              &pfx_1_1_1_1_s_32,
6993                              FIB_SOURCE_API,
6994                              FIB_ENTRY_FLAG_NONE,
6995                              DPO_PROTO_IP4,
6996                              &nh_10_10_10_1,
6997                              tm->hw[0]->sw_if_index,
6998                              ~0, // invalid fib index
6999                              1,
7000                              l99,
7001                              FIB_ROUTE_PATH_FLAG_NONE);
7002
7003     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
7004     FIB_TEST(!fib_test_validate_entry(fei,
7005                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7006                                       2,
7007                                       &l99_eos_o_10_10_10_1,
7008                                       &adj_o_10_10_11_2),
7009              "1.1.1.1/32 LB 2 buckets via: "
7010              "label 99 over 10.10.10.1, "
7011              "adj over 10.10.11.2");
7012
7013     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7014                            &pfx_24001_eos);
7015     FIB_TEST(!fib_test_validate_entry(fei,
7016                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
7017                                       2,
7018                                       &l99_eos_o_10_10_10_1,
7019                                       &disp_o_10_10_11_2),
7020              "24001/eos LB 2 buckets via: "
7021              "label 99 over 10.10.10.1, "
7022              "MPLS disp adj over 10.10.11.2");
7023
7024     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7025                            &pfx_24001_neos);
7026     FIB_TEST(!fib_test_validate_entry(fei,
7027                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
7028                                       1,
7029                                       &l99_neos_o_10_10_10_1),
7030              "24001/neos LB 1 buckets via: "
7031              "label 99 over 10.10.10.1");
7032
7033     /*
7034      * change the local label
7035      */
7036     fib_table_entry_local_label_add(fib_index,
7037                                     &pfx_1_1_1_1_s_32,
7038                                     25005);
7039
7040     fib_prefix_t pfx_25005_eos = {
7041         .fp_proto = FIB_PROTOCOL_MPLS,
7042         .fp_label = 25005,
7043         .fp_eos = MPLS_EOS,
7044     };
7045     fib_prefix_t pfx_25005_neos = {
7046         .fp_proto = FIB_PROTOCOL_MPLS,
7047         .fp_label = 25005,
7048         .fp_eos = MPLS_NON_EOS,
7049     };
7050
7051     FIB_TEST((FIB_NODE_INDEX_INVALID ==
7052               fib_table_lookup(fib_index, &pfx_24001_eos)),
7053              "24001/eos removed after label change");
7054     FIB_TEST((FIB_NODE_INDEX_INVALID ==
7055               fib_table_lookup(fib_index, &pfx_24001_neos)),
7056              "24001/eos removed after label change");
7057
7058     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7059                            &pfx_25005_eos);
7060     FIB_TEST(!fib_test_validate_entry(fei,
7061                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
7062                                       2,
7063                                       &l99_eos_o_10_10_10_1,
7064                                       &disp_o_10_10_11_2),
7065              "25005/eos LB 2 buckets via: "
7066              "label 99 over 10.10.10.1, "
7067              "MPLS disp adj over 10.10.11.2");
7068
7069     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
7070                            &pfx_25005_neos);
7071     FIB_TEST(!fib_test_validate_entry(fei,
7072                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
7073                                       1,
7074                                       &l99_neos_o_10_10_10_1),
7075              "25005/neos LB 1 buckets via: "
7076              "label 99 over 10.10.10.1");
7077
7078     /*
7079      * remove the local label.
7080      * the check that the MPLS entries are gone is done by the fact the
7081      * MPLS table is no longer present.
7082      */
7083     fib_table_entry_local_label_remove(fib_index,
7084                                        &pfx_1_1_1_1_s_32,
7085                                        25005);
7086
7087     fei = fib_table_lookup(fib_index, &pfx_1_1_1_1_s_32);
7088     FIB_TEST(!fib_test_validate_entry(fei,
7089                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7090                                       2,
7091                                       &l99_eos_o_10_10_10_1,
7092                                       &adj_o_10_10_11_2),
7093              "24001/eos LB 2 buckets via: "
7094              "label 99 over 10.10.10.1, "
7095              "adj over 10.10.11.2");
7096
7097     FIB_TEST((FIB_NODE_INDEX_INVALID ==
7098               mpls_fib_index_from_table_id(MPLS_FIB_DEFAULT_TABLE_ID)),
7099              "No more MPLS FIB entries => table removed");
7100
7101     /*
7102      * add another via-entry for the recursive
7103      */
7104     fib_prefix_t pfx_1_1_1_2_s_32 = {
7105         .fp_len = 32,
7106         .fp_proto = FIB_PROTOCOL_IP4,
7107         .fp_addr = {
7108             .ip4.as_u32 = clib_host_to_net_u32(0x01010102),
7109         },
7110     };
7111     fib_test_lb_bucket_t l101_eos_o_10_10_10_1 = {
7112         .type = FT_LB_LABEL_O_ADJ,
7113         .label_o_adj = {
7114             .adj = ai_mpls_10_10_10_1,
7115             .label = 101,
7116             .eos = MPLS_EOS,
7117         },
7118     };
7119     fib_mpls_label_t *l101 = NULL, fml101 = {
7120         .fml_value = 101,
7121     };
7122     vec_add1(l101, fml101);
7123
7124     fei = fib_table_entry_update_one_path(fib_index,
7125                                           &pfx_1_1_1_2_s_32,
7126                                           FIB_SOURCE_API,
7127                                           FIB_ENTRY_FLAG_NONE,
7128                                           DPO_PROTO_IP4,
7129                                           &nh_10_10_10_1,
7130                                           tm->hw[0]->sw_if_index,
7131                                           ~0, // invalid fib index
7132                                           1,
7133                                           l101,
7134                                           FIB_ROUTE_PATH_FLAG_NONE);
7135
7136     FIB_TEST(!fib_test_validate_entry(fei,
7137                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7138                                       1,
7139                                       &l101_eos_o_10_10_10_1),
7140              "1.1.1.2/32 LB 1 buckets via: "
7141              "label 101 over 10.10.10.1");
7142
7143     dpo_id_t non_eos_1_1_1_2 = DPO_INVALID;
7144     fib_entry_contribute_forwarding(fib_table_lookup(fib_index,
7145                                                      &pfx_1_1_1_1_s_32),
7146                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
7147                                     &non_eos_1_1_1_1);
7148     fib_entry_contribute_forwarding(fib_table_lookup(fib_index,
7149                                                      &pfx_1_1_1_2_s_32),
7150                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
7151                                     &non_eos_1_1_1_2);
7152
7153     fib_test_lb_bucket_t l1601_eos_o_1_1_1_2 = {
7154         .type = FT_LB_LABEL_O_LB,
7155         .label_o_lb = {
7156             .lb = non_eos_1_1_1_2.dpoi_index,
7157             .label = 1601,
7158             .eos = MPLS_EOS,
7159         },
7160     };
7161     fib_mpls_label_t *l1601 = NULL, fml1601 = {
7162         .fml_value = 1601,
7163     };
7164     vec_add1(l1601, fml1601);
7165
7166     l1600_eos_o_1_1_1_1.label_o_lb.lb = non_eos_1_1_1_1.dpoi_index;
7167
7168     fei = fib_table_entry_path_add(fib_index,
7169                                    &pfx_2_2_2_2_s_32,
7170                                    FIB_SOURCE_API,
7171                                    FIB_ENTRY_FLAG_NONE,
7172                                    DPO_PROTO_IP4,
7173                                    &pfx_1_1_1_2_s_32.fp_addr,
7174                                    ~0,
7175                                    fib_index,
7176                                    1,
7177                                    l1601,
7178                                    FIB_ROUTE_PATH_FLAG_NONE);
7179
7180     FIB_TEST(!fib_test_validate_entry(fei,
7181                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7182                                       2,
7183                                       &l1600_eos_o_1_1_1_1,
7184                                       &l1601_eos_o_1_1_1_2),
7185              "2.2.2.2/32 LB 2 buckets via: "
7186              "label 1600 via 1.1,1.1, "
7187              "label 16001 via 1.1.1.2");
7188
7189     /*
7190      * update the via-entry so it no longer has an imp-null path.
7191      * the LB for the recursive can use an imp-null
7192      */
7193     l_imp_null = NULL;
7194     vec_add1(l_imp_null, fml_imp_null);
7195
7196     fei = fib_table_entry_update_one_path(fib_index,
7197                                           &pfx_1_1_1_2_s_32,
7198                                           FIB_SOURCE_API,
7199                                           FIB_ENTRY_FLAG_NONE,
7200                                           DPO_PROTO_IP4,
7201                                           &nh_10_10_11_1,
7202                                           tm->hw[1]->sw_if_index,
7203                                           ~0, // invalid fib index
7204                                           1,
7205                                           l_imp_null,
7206                                           FIB_ROUTE_PATH_FLAG_NONE);
7207
7208     FIB_TEST(!fib_test_validate_entry(fei,
7209                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7210                                       1,
7211                                       &a_o_10_10_11_1),
7212              "1.1.1.2/32 LB 1 buckets via: "
7213              "adj 10.10.11.1");
7214
7215     fei = fib_table_lookup(fib_index, &pfx_2_2_2_2_s_32);
7216     FIB_TEST(!fib_test_validate_entry(fei,
7217                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7218                                       2,
7219                                       &l1600_eos_o_1_1_1_1,
7220                                       &l1601_eos_o_1_1_1_2),
7221              "2.2.2.2/32 LB 2 buckets via: "
7222              "label 1600 via 1.1,1.1, "
7223              "label 16001 via 1.1.1.2");
7224
7225     /*
7226      * update the via-entry so it no longer has labelled paths.
7227      * the LB for the recursive should exclue this via form its LB
7228      */
7229     fei = fib_table_entry_update_one_path(fib_index,
7230                                           &pfx_1_1_1_2_s_32,
7231                                           FIB_SOURCE_API,
7232                                           FIB_ENTRY_FLAG_NONE,
7233                                           DPO_PROTO_IP4,
7234                                           &nh_10_10_11_1,
7235                                           tm->hw[1]->sw_if_index,
7236                                           ~0, // invalid fib index
7237                                           1,
7238                                           NULL,
7239                                           FIB_ROUTE_PATH_FLAG_NONE);
7240
7241     FIB_TEST(!fib_test_validate_entry(fei,
7242                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7243                                       1,
7244                                       &a_o_10_10_11_1),
7245              "1.1.1.2/32 LB 1 buckets via: "
7246              "adj 10.10.11.1");
7247
7248     fei = fib_table_lookup(fib_index, &pfx_2_2_2_2_s_32);
7249     FIB_TEST(!fib_test_validate_entry(fei,
7250                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7251                                       1,
7252                                       &l1600_eos_o_1_1_1_1),
7253              "2.2.2.2/32 LB 1 buckets via: "
7254              "label 1600 via 1.1,1.1");
7255
7256     dpo_reset(&non_eos_1_1_1_1);
7257     dpo_reset(&non_eos_1_1_1_2);
7258
7259     /*
7260      * Add a recursive with no out-labels. We expect to use the IP of the via
7261      */
7262     fib_prefix_t pfx_2_2_2_3_s_32 = {
7263         .fp_len = 32,
7264         .fp_proto = FIB_PROTOCOL_IP4,
7265         .fp_addr = {
7266             .ip4.as_u32 = clib_host_to_net_u32(0x02020203),
7267         },
7268     };
7269     dpo_id_t ip_1_1_1_1 = DPO_INVALID;
7270
7271     fib_table_entry_update_one_path(fib_index,
7272                                     &pfx_2_2_2_3_s_32,
7273                                     FIB_SOURCE_API,
7274                                     FIB_ENTRY_FLAG_NONE,
7275                                     DPO_PROTO_IP4,
7276                                     &pfx_1_1_1_1_s_32.fp_addr,
7277                                     ~0,
7278                                     fib_index,
7279                                     1,
7280                                     NULL,
7281                                     FIB_ROUTE_PATH_FLAG_NONE);
7282
7283     fib_entry_contribute_forwarding(fib_table_lookup(fib_index,
7284                                                      &pfx_1_1_1_1_s_32),
7285                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7286                                     &ip_1_1_1_1);
7287
7288     fib_test_lb_bucket_t ip_o_1_1_1_1 = {
7289         .type = FT_LB_O_LB,
7290         .lb = {
7291             .lb = ip_1_1_1_1.dpoi_index,
7292         },
7293     };
7294
7295     fei = fib_table_lookup(fib_index, &pfx_2_2_2_3_s_32);
7296     FIB_TEST(!fib_test_validate_entry(fei,
7297                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7298                                       1,
7299                                       &ip_o_1_1_1_1),
7300              "2.2.2.2.3/32 LB 1 buckets via: "
7301              "ip 1.1.1.1");
7302
7303     /*
7304      * Add a recursive with an imp-null out-label.
7305      * We expect to use the IP of the via
7306      */
7307     fib_prefix_t pfx_2_2_2_4_s_32 = {
7308         .fp_len = 32,
7309         .fp_proto = FIB_PROTOCOL_IP4,
7310         .fp_addr = {
7311             .ip4.as_u32 = clib_host_to_net_u32(0x02020204),
7312         },
7313     };
7314
7315     fib_table_entry_update_one_path(fib_index,
7316                                     &pfx_2_2_2_4_s_32,
7317                                     FIB_SOURCE_API,
7318                                     FIB_ENTRY_FLAG_NONE,
7319                                     DPO_PROTO_IP4,
7320                                     &pfx_1_1_1_1_s_32.fp_addr,
7321                                     ~0,
7322                                     fib_index,
7323                                     1,
7324                                     NULL,
7325                                     FIB_ROUTE_PATH_FLAG_NONE);
7326
7327     fei = fib_table_lookup(fib_index, &pfx_2_2_2_4_s_32);
7328     FIB_TEST(!fib_test_validate_entry(fei,
7329                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7330                                       1,
7331                                       &ip_o_1_1_1_1),
7332              "2.2.2.2.4/32 LB 1 buckets via: "
7333              "ip 1.1.1.1");
7334
7335     dpo_reset(&ip_1_1_1_1);
7336
7337     /*
7338      * Create an entry with a deep label stack
7339      */
7340     fib_prefix_t pfx_2_2_5_5_s_32 = {
7341         .fp_len = 32,
7342         .fp_proto = FIB_PROTOCOL_IP4,
7343         .fp_addr = {
7344             .ip4.as_u32 = clib_host_to_net_u32(0x02020505),
7345         },
7346     };
7347     fib_test_lb_bucket_t ls_eos_o_10_10_10_1 = {
7348         .type = FT_LB_LABEL_STACK_O_ADJ,
7349         .label_stack_o_adj = {
7350             .adj = ai_mpls_10_10_11_1,
7351             .label_stack_size = 8,
7352             .label_stack = {
7353                 200, 201, 202, 203, 204, 205, 206, 207
7354             },
7355             .eos = MPLS_EOS,
7356         },
7357     };
7358     fib_mpls_label_t *label_stack = NULL;
7359     vec_validate(label_stack, 7);
7360     for (ii = 0; ii < 8; ii++)
7361     {
7362         label_stack[ii].fml_value = ii + 200;
7363     }
7364
7365     fei = fib_table_entry_update_one_path(fib_index,
7366                                           &pfx_2_2_5_5_s_32,
7367                                           FIB_SOURCE_API,
7368                                           FIB_ENTRY_FLAG_NONE,
7369                                           DPO_PROTO_IP4,
7370                                           &nh_10_10_11_1,
7371                                           tm->hw[1]->sw_if_index,
7372                                           ~0, // invalid fib index
7373                                           1,
7374                                           label_stack,
7375                                           FIB_ROUTE_PATH_FLAG_NONE);
7376
7377     FIB_TEST(!fib_test_validate_entry(fei,
7378                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7379                                       1,
7380                                       &ls_eos_o_10_10_10_1),
7381              "2.2.5.5/32 LB 1 buckets via: "
7382              "adj 10.10.11.1");
7383     fib_table_entry_delete_index(fei, FIB_SOURCE_API);
7384
7385     /*
7386      * A prefix with outgoing labels. We'll RR source a /32 it covers
7387      * and test that the RR source picks up the out-going labels
7388      */
7389     fib_prefix_t pfx_100_s_8 = {
7390         .fp_len = 8,
7391         .fp_proto = FIB_PROTOCOL_IP4,
7392         .fp_addr = {
7393             .ip4.as_u32 = clib_host_to_net_u32(0x64000000),
7394         },
7395     };
7396     fib_test_lb_bucket_t l_100_eos_o_10_10_10_1 = {
7397         .type = FT_LB_LABEL_O_ADJ,
7398         .label_o_adj = {
7399             .adj = ai_mpls_10_10_11_1,
7400             .label = 1602,
7401             .eos = MPLS_EOS,
7402         },
7403     };
7404     fib_mpls_label_t *l1602 = NULL, fml1602 = {
7405         .fml_value = 1602,
7406     };
7407     vec_add1(l1602, fml1602);
7408     fei = fib_table_entry_update_one_path(fib_index,
7409                                           &pfx_100_s_8,
7410                                           FIB_SOURCE_API,
7411                                           FIB_ENTRY_FLAG_NONE,
7412                                           DPO_PROTO_IP4,
7413                                           &nh_10_10_11_1,
7414                                           tm->hw[1]->sw_if_index,
7415                                           ~0, // invalid fib index
7416                                           1,
7417                                           l1602,
7418                                           FIB_ROUTE_PATH_FLAG_NONE);
7419
7420     FIB_TEST(!fib_test_validate_entry(fei,
7421                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7422                                       1,
7423                                       &l_100_eos_o_10_10_10_1),
7424              "100.0.0.0/8 LB 1 buckets via: lbl 101 "
7425              "adj 10.10.11.1");
7426
7427     fib_prefix_t pfx_100_1_1_1_s_32 = {
7428         .fp_len = 32,
7429         .fp_proto = FIB_PROTOCOL_IP4,
7430         .fp_addr = {
7431             .ip4.as_u32 = clib_host_to_net_u32(0x64010101),
7432         },
7433     };
7434
7435     fei = fib_table_entry_special_add(fib_index,
7436                                       &pfx_100_1_1_1_s_32,
7437                                       FIB_SOURCE_RR,
7438                                       FIB_ENTRY_FLAG_NONE);
7439
7440     FIB_TEST(!fib_test_validate_entry(fei,
7441                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7442                                       1,
7443                                       &l_100_eos_o_10_10_10_1),
7444              "100.1.1.1/32 LB 1 buckets via: "
7445              "adj 10.10.11.1");
7446
7447     fib_table_entry_delete(fib_index,
7448                            &pfx_100_s_8,
7449                            FIB_SOURCE_API);
7450     fib_table_entry_delete_index(fei, FIB_SOURCE_RR);
7451
7452     /*
7453      * cleanup
7454      */
7455     fib_table_entry_delete(fib_index,
7456                            &pfx_1_1_1_2_s_32,
7457                            FIB_SOURCE_API);
7458
7459     fei = fib_table_lookup(fib_index, &pfx_2_2_2_2_s_32);
7460     FIB_TEST(!fib_test_validate_entry(fei,
7461                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7462                                       1,
7463                                       &l1600_eos_o_1_1_1_1),
7464              "2.2.2.2/32 LB 1 buckets via: "
7465              "label 1600 via 1.1,1.1");
7466
7467     fib_table_entry_delete(fib_index,
7468                            &pfx_1_1_1_1_s_32,
7469                            FIB_SOURCE_API);
7470
7471     FIB_TEST(!fib_test_validate_entry(fei,
7472                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
7473                                       1,
7474                                       &bucket_drop),
7475              "2.2.2.2/32 LB 1 buckets via: DROP");
7476
7477     fib_table_entry_delete(fib_index,
7478                            &pfx_2_2_2_2_s_32,
7479                            FIB_SOURCE_API);
7480     fib_table_entry_delete(fib_index,
7481                            &pfx_2_2_2_3_s_32,
7482                            FIB_SOURCE_API);
7483     fib_table_entry_delete(fib_index,
7484                            &pfx_2_2_2_4_s_32,
7485                            FIB_SOURCE_API);
7486
7487     adj_unlock(ai_mpls_10_10_10_1);
7488     adj_unlock(ai_mpls_10_10_11_2);
7489     adj_unlock(ai_v4_10_10_11_1);
7490     adj_unlock(ai_v4_10_10_11_2);
7491     adj_unlock(ai_mpls_10_10_11_1);
7492
7493     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
7494              adj_nbr_db_size());
7495
7496     local0_pfx.fp_len = 32;
7497     fib_table_entry_delete(fib_index,
7498                            &local0_pfx,
7499                            FIB_SOURCE_INTERFACE);
7500     local0_pfx.fp_len = 24;
7501     fib_table_entry_delete(fib_index,
7502                            &local0_pfx,
7503                            FIB_SOURCE_INTERFACE);
7504     local1_pfx.fp_len = 32;
7505     fib_table_entry_delete(fib_index,
7506                            &local1_pfx,
7507                            FIB_SOURCE_INTERFACE);
7508     local1_pfx.fp_len = 24;
7509     fib_table_entry_delete(fib_index,
7510                            &local1_pfx,
7511                            FIB_SOURCE_INTERFACE);
7512
7513     /*
7514      * +1 for the drop LB in the MPLS tables.
7515      */
7516     FIB_TEST(lb_count+1 == pool_elts(load_balance_pool),
7517              "Load-balance resources freed %d of %d",
7518              lb_count+1, pool_elts(load_balance_pool));
7519
7520     return (res);
7521 }
7522
7523 #define N_TEST_CHILDREN 4
7524 #define PARENT_INDEX 0
7525
7526 typedef struct fib_node_test_t_
7527 {
7528     fib_node_t node;
7529     u32 sibling;
7530     u32 index;
7531     fib_node_back_walk_ctx_t *ctxs;
7532     u32 destroyed;
7533 } fib_node_test_t;
7534
7535 static fib_node_test_t fib_test_nodes[N_TEST_CHILDREN+1];
7536
7537 #define PARENT() (&fib_test_nodes[PARENT_INDEX].node)
7538
7539 #define FOR_EACH_TEST_CHILD(_tc)                \
7540     for (ii = 1, (_tc) = &fib_test_nodes[1];    \
7541          ii < N_TEST_CHILDREN+1;                \
7542          ii++, (_tc) = &fib_test_nodes[ii])
7543
7544 static fib_node_t *
7545 fib_test_child_get_node (fib_node_index_t index)
7546 {
7547     return (&fib_test_nodes[index].node);
7548 }
7549
7550 static int fib_test_walk_spawns_walks;
7551
7552 static fib_node_back_walk_rc_t
7553 fib_test_child_back_walk_notify (fib_node_t *node,
7554                                  fib_node_back_walk_ctx_t *ctx)
7555 {
7556     fib_node_test_t *tc = (fib_node_test_t*) node;
7557
7558     vec_add1(tc->ctxs, *ctx);
7559
7560     if (1 == fib_test_walk_spawns_walks)
7561         fib_walk_sync(FIB_NODE_TYPE_TEST, tc->index, ctx);
7562     if (2 == fib_test_walk_spawns_walks)
7563         fib_walk_async(FIB_NODE_TYPE_TEST, tc->index,
7564                        FIB_WALK_PRIORITY_HIGH, ctx);
7565
7566     return (FIB_NODE_BACK_WALK_CONTINUE);
7567 }
7568
7569 static void
7570 fib_test_child_last_lock_gone (fib_node_t *node)
7571 {
7572     fib_node_test_t *tc = (fib_node_test_t *)node;
7573
7574     tc->destroyed = 1;
7575 }
7576
7577 /**
7578  * The FIB walk's graph node virtual function table
7579  */
7580 static const fib_node_vft_t fib_test_child_vft = {
7581     .fnv_get = fib_test_child_get_node,
7582     .fnv_last_lock = fib_test_child_last_lock_gone,
7583     .fnv_back_walk = fib_test_child_back_walk_notify,
7584 };
7585
7586 /*
7587  * the function (that should have been static but isn't so I can do this)
7588  * that processes the walk from the async queue,
7589  */
7590 f64 fib_walk_process_queues(vlib_main_t * vm,
7591                             const f64 quota);
7592 u32 fib_walk_queue_get_size(fib_walk_priority_t prio);
7593
7594 static int
7595 fib_test_walk (void)
7596 {
7597     fib_node_back_walk_ctx_t high_ctx = {}, low_ctx = {};
7598     fib_node_test_t *tc;
7599     vlib_main_t *vm;
7600     u32 ii, res;
7601
7602     res = 0;
7603     vm = vlib_get_main();
7604     fib_node_register_type(FIB_NODE_TYPE_TEST, &fib_test_child_vft);
7605
7606     /*
7607      * init a fake node on which we will add children
7608      */
7609     fib_node_init(&fib_test_nodes[PARENT_INDEX].node,
7610                   FIB_NODE_TYPE_TEST);
7611
7612     FOR_EACH_TEST_CHILD(tc)
7613     {
7614         fib_node_init(&tc->node, FIB_NODE_TYPE_TEST);
7615         fib_node_lock(&tc->node);
7616         tc->ctxs = NULL;
7617         tc->index = ii;
7618         tc->sibling = fib_node_child_add(FIB_NODE_TYPE_TEST,
7619                                          PARENT_INDEX,
7620                                          FIB_NODE_TYPE_TEST, ii);
7621     }
7622
7623     /*
7624      * enqueue a walk across the parents children.
7625      */
7626     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7627
7628     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7629                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7630     FIB_TEST(N_TEST_CHILDREN+1 == fib_node_list_get_size(PARENT()->fn_children),
7631              "Parent has %d children pre-walk",
7632              fib_node_list_get_size(PARENT()->fn_children));
7633
7634     /*
7635      * give the walk a large amount of time so it gets to the end
7636      */
7637     fib_walk_process_queues(vm, 1);
7638
7639     FOR_EACH_TEST_CHILD(tc)
7640     {
7641         FIB_TEST(1 == vec_len(tc->ctxs),
7642                  "%d child visitsed %d times",
7643                  ii, vec_len(tc->ctxs));
7644         vec_free(tc->ctxs);
7645     }
7646     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7647              "Queue is empty post walk");
7648     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7649              "Parent has %d children post walk",
7650              fib_node_list_get_size(PARENT()->fn_children));
7651
7652     /*
7653      * walk again. should be no increase in the number of visits, since
7654      * the walk will have terminated.
7655      */
7656     fib_walk_process_queues(vm, 1);
7657
7658     FOR_EACH_TEST_CHILD(tc)
7659     {
7660         FIB_TEST(0 == vec_len(tc->ctxs),
7661                  "%d child visitsed %d times",
7662                  ii, vec_len(tc->ctxs));
7663     }
7664
7665     /*
7666      * schedule a low and hig priority walk. expect the high to be performed
7667      * before the low.
7668      * schedule the high prio walk first so that it is further from the head
7669      * of the dependency list. that way it won't merge with the low one.
7670      */
7671     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7672     low_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE;
7673
7674     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7675                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7676     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7677                    FIB_WALK_PRIORITY_LOW, &low_ctx);
7678
7679     fib_walk_process_queues(vm, 1);
7680
7681     FOR_EACH_TEST_CHILD(tc)
7682     {
7683         FIB_TEST(high_ctx.fnbw_reason == tc->ctxs[0].fnbw_reason,
7684                  "%d child visitsed by high prio walk", ii);
7685         FIB_TEST(low_ctx.fnbw_reason  == tc->ctxs[1].fnbw_reason,
7686                  "%d child visitsed by low prio walk", ii);
7687         vec_free(tc->ctxs);
7688     }
7689     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7690              "Queue is empty post prio walk");
7691     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7692              "Parent has %d children post prio walk",
7693              fib_node_list_get_size(PARENT()->fn_children));
7694
7695     /*
7696      * schedule 2 walks of the same priority that can be megred.
7697      * expect that each child is thus visited only once.
7698      */
7699     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7700     low_ctx.fnbw_reason  = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7701
7702     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7703                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7704     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7705                    FIB_WALK_PRIORITY_HIGH, &low_ctx);
7706
7707     fib_walk_process_queues(vm, 1);
7708
7709     FOR_EACH_TEST_CHILD(tc)
7710     {
7711         FIB_TEST(1 == vec_len(tc->ctxs),
7712                  "%d child visitsed %d times during merge walk",
7713                  ii, vec_len(tc->ctxs));
7714         vec_free(tc->ctxs);
7715     }
7716     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7717              "Queue is empty post merge walk");
7718     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7719              "Parent has %d children post merge walk",
7720              fib_node_list_get_size(PARENT()->fn_children));
7721
7722     /*
7723      * schedule 2 walks of the same priority that cannot be megred.
7724      * expect that each child is thus visited twice and in the order
7725      * in which the walks were scheduled.
7726      */
7727     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7728     low_ctx.fnbw_reason  = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE;
7729
7730     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7731                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7732     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7733                    FIB_WALK_PRIORITY_HIGH, &low_ctx);
7734
7735     fib_walk_process_queues(vm, 1);
7736
7737     FOR_EACH_TEST_CHILD(tc)
7738     {
7739         FIB_TEST(high_ctx.fnbw_reason == tc->ctxs[0].fnbw_reason,
7740                  "%d child visitsed by high prio walk", ii);
7741         FIB_TEST(low_ctx.fnbw_reason  == tc->ctxs[1].fnbw_reason,
7742                  "%d child visitsed by low prio walk", ii);
7743         vec_free(tc->ctxs);
7744     }
7745     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7746              "Queue is empty post no-merge walk");
7747     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7748              "Parent has %d children post no-merge walk",
7749              fib_node_list_get_size(PARENT()->fn_children));
7750
7751     /*
7752      * schedule a walk that makes one one child progress.
7753      * we do this by giving the queue draining process zero
7754      * time quanta. it's a do..while loop, so it does something.
7755      */
7756     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7757
7758     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7759                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7760     fib_walk_process_queues(vm, 0);
7761
7762     FOR_EACH_TEST_CHILD(tc)
7763     {
7764         if (ii == N_TEST_CHILDREN)
7765         {
7766             FIB_TEST(1 == vec_len(tc->ctxs),
7767                      "%d child visitsed %d times in zero quanta walk",
7768                      ii, vec_len(tc->ctxs));
7769         }
7770         else
7771         {
7772             FIB_TEST(0 == vec_len(tc->ctxs),
7773                      "%d child visitsed %d times in 0 quanta walk",
7774                      ii, vec_len(tc->ctxs));
7775         }
7776     }
7777     FIB_TEST(1 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7778              "Queue is not empty post zero quanta walk");
7779     FIB_TEST(N_TEST_CHILDREN+1 == fib_node_list_get_size(PARENT()->fn_children),
7780              "Parent has %d children post zero qunta walk",
7781              fib_node_list_get_size(PARENT()->fn_children));
7782
7783     /*
7784      * another one step
7785      */
7786     fib_walk_process_queues(vm, 0);
7787
7788     FOR_EACH_TEST_CHILD(tc)
7789     {
7790         if (ii >= N_TEST_CHILDREN-1)
7791         {
7792             FIB_TEST(1 == vec_len(tc->ctxs),
7793                      "%d child visitsed %d times in 2nd zero quanta walk",
7794                      ii, vec_len(tc->ctxs));
7795         }
7796         else
7797         {
7798             FIB_TEST(0 == vec_len(tc->ctxs),
7799                      "%d child visitsed %d times in 2nd 0 quanta walk",
7800                      ii, vec_len(tc->ctxs));
7801         }
7802     }
7803     FIB_TEST(1 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7804              "Queue is not empty post zero quanta walk");
7805     FIB_TEST(N_TEST_CHILDREN+1 == fib_node_list_get_size(PARENT()->fn_children),
7806              "Parent has %d children post zero qunta walk",
7807              fib_node_list_get_size(PARENT()->fn_children));
7808
7809     /*
7810      * schedule another walk that will catch-up and merge.
7811      */
7812     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7813                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7814     fib_walk_process_queues(vm, 1);
7815
7816     FOR_EACH_TEST_CHILD(tc)
7817     {
7818         if (ii >= N_TEST_CHILDREN-1)
7819         {
7820             FIB_TEST(2 == vec_len(tc->ctxs),
7821                      "%d child visitsed %d times in 2nd zero quanta merge walk",
7822                      ii, vec_len(tc->ctxs));
7823             vec_free(tc->ctxs);
7824         }
7825         else
7826         {
7827             FIB_TEST(1 == vec_len(tc->ctxs),
7828                      "%d child visitsed %d times in 2nd 0 quanta merge walk",
7829                      ii, vec_len(tc->ctxs));
7830             vec_free(tc->ctxs);
7831         }
7832     }
7833     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7834              "Queue is not empty post 2nd zero quanta merge walk");
7835     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7836              "Parent has %d children post 2nd zero qunta merge walk",
7837              fib_node_list_get_size(PARENT()->fn_children));
7838
7839     /*
7840      * park a async walk in the middle of the list, then have an sync walk catch
7841      * it. same expectations as async catches async.
7842      */
7843     high_ctx.fnbw_reason = FIB_NODE_BW_REASON_FLAG_RESOLVE;
7844
7845     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7846                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7847
7848     fib_walk_process_queues(vm, 0);
7849     fib_walk_process_queues(vm, 0);
7850
7851     fib_walk_sync(FIB_NODE_TYPE_TEST, PARENT_INDEX, &high_ctx);
7852
7853     FOR_EACH_TEST_CHILD(tc)
7854     {
7855         if (ii >= N_TEST_CHILDREN-1)
7856         {
7857             FIB_TEST(2 == vec_len(tc->ctxs),
7858                      "%d child visitsed %d times in sync catches async walk",
7859                      ii, vec_len(tc->ctxs));
7860             vec_free(tc->ctxs);
7861         }
7862         else
7863         {
7864             FIB_TEST(1 == vec_len(tc->ctxs),
7865                      "%d child visitsed %d times in sync catches async walk",
7866                      ii, vec_len(tc->ctxs));
7867             vec_free(tc->ctxs);
7868         }
7869     }
7870     FIB_TEST(0 == fib_walk_queue_get_size(FIB_WALK_PRIORITY_HIGH),
7871              "Queue is not empty post 2nd zero quanta merge walk");
7872     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7873              "Parent has %d children post 2nd zero qunta merge walk",
7874              fib_node_list_get_size(PARENT()->fn_children));
7875
7876     /*
7877      * make the parent a child of one of its children, thus inducing a routing loop.
7878      */
7879     fib_test_nodes[PARENT_INDEX].sibling =
7880         fib_node_child_add(FIB_NODE_TYPE_TEST,
7881                            1, // the first child
7882                            FIB_NODE_TYPE_TEST,
7883                            PARENT_INDEX);
7884
7885     /*
7886      * execute a sync walk from the parent. each child visited spawns more sync
7887      * walks. we expect the walk to terminate.
7888      */
7889     fib_test_walk_spawns_walks = 1;
7890
7891     fib_walk_sync(FIB_NODE_TYPE_TEST, PARENT_INDEX, &high_ctx);
7892
7893     FOR_EACH_TEST_CHILD(tc)
7894     {
7895         /*
7896          * child 1 - which is last in the list - has the loop.
7897          * the other children a re thus visitsed first. the we meet
7898          * child 1. we go round the loop again, visting the other children.
7899          * then we meet the walk in the dep list and bail. child 1 is not visitsed
7900          * again.
7901          */
7902         if (1 == ii)
7903         {
7904             FIB_TEST(1 == vec_len(tc->ctxs),
7905                      "child %d visitsed %d times during looped sync walk",
7906                      ii, vec_len(tc->ctxs));
7907         }
7908         else
7909         {
7910             FIB_TEST(2 == vec_len(tc->ctxs),
7911                      "child %d visitsed %d times during looped sync walk",
7912                      ii, vec_len(tc->ctxs));
7913         }
7914         vec_free(tc->ctxs);
7915     }
7916     FIB_TEST(N_TEST_CHILDREN == fib_node_list_get_size(PARENT()->fn_children),
7917              "Parent has %d children post sync loop walk",
7918              fib_node_list_get_size(PARENT()->fn_children));
7919
7920     /*
7921      * the walk doesn't reach the max depth because the infra knows that sync
7922      * meets sync implies a loop and bails early.
7923      */
7924     FIB_TEST(high_ctx.fnbw_depth == 9,
7925              "Walk context depth %d post sync loop walk",
7926              high_ctx.fnbw_depth);
7927
7928     /*
7929      * execute an async walk of the graph loop, with each child spawns sync walks
7930      */
7931     high_ctx.fnbw_depth = 0;
7932     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7933                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7934
7935     fib_walk_process_queues(vm, 1);
7936
7937     FOR_EACH_TEST_CHILD(tc)
7938     {
7939         /*
7940          * we don't really care how many times the children are visited, as long as
7941          * it is more than once.
7942          */
7943         FIB_TEST(1 <= vec_len(tc->ctxs),
7944                  "child %d visitsed %d times during looped aync spawns sync walk",
7945                  ii, vec_len(tc->ctxs));
7946         vec_free(tc->ctxs);
7947     }
7948
7949     /*
7950      * execute an async walk of the graph loop, with each child spawns async walks
7951      */
7952     fib_test_walk_spawns_walks = 2;
7953     high_ctx.fnbw_depth = 0;
7954     fib_walk_async(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7955                    FIB_WALK_PRIORITY_HIGH, &high_ctx);
7956
7957     fib_walk_process_queues(vm, 1);
7958
7959     FOR_EACH_TEST_CHILD(tc)
7960     {
7961         /*
7962          * we don't really care how many times the children are visited, as long as
7963          * it is more than once.
7964          */
7965         FIB_TEST(1 <= vec_len(tc->ctxs),
7966                  "child %d visitsed %d times during looped async spawns async walk",
7967                  ii, vec_len(tc->ctxs));
7968         vec_free(tc->ctxs);
7969     }
7970
7971
7972     fib_node_child_remove(FIB_NODE_TYPE_TEST,
7973                           1, // the first child
7974                           fib_test_nodes[PARENT_INDEX].sibling);
7975
7976     /*
7977      * cleanup
7978      */
7979     FOR_EACH_TEST_CHILD(tc)
7980     {
7981         fib_node_child_remove(FIB_NODE_TYPE_TEST, PARENT_INDEX,
7982                               tc->sibling);
7983         fib_node_deinit(&tc->node);
7984         fib_node_unlock(&tc->node);
7985     }
7986     fib_node_deinit(PARENT());
7987
7988     /*
7989      * The parent will be destroyed when the last lock on it goes.
7990      * this test ensures all the walk objects are unlocking it.
7991      */
7992     FIB_TEST((1 == fib_test_nodes[PARENT_INDEX].destroyed),
7993              "Parent was destroyed");
7994
7995     return (res);
7996 }
7997
7998 /*
7999  * declaration of the otherwise static callback functions
8000  */
8001 void fib_bfd_notify (bfd_listen_event_e event,
8002                      const bfd_session_t *session);
8003 void adj_bfd_notify (bfd_listen_event_e event,
8004                      const bfd_session_t *session);
8005
8006 /**
8007  * Test BFD session interaction with FIB
8008  */
8009 static int
8010 fib_test_bfd (void)
8011 {
8012     fib_node_index_t fei;
8013     test_main_t *tm;
8014     int n_feis, res;
8015
8016     res = 0;
8017     /* via 10.10.10.1 */
8018     ip46_address_t nh_10_10_10_1 = {
8019         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
8020     };
8021     /* via 10.10.10.2 */
8022     ip46_address_t nh_10_10_10_2 = {
8023         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
8024     };
8025     /* via 10.10.10.10 */
8026     ip46_address_t nh_10_10_10_10 = {
8027         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
8028     };
8029     n_feis = fib_entry_pool_size();
8030
8031     tm = &test_main;
8032
8033     /*
8034      * add interface routes. we'll assume this works. it's tested elsewhere
8035      */
8036     fib_prefix_t pfx_10_10_10_10_s_24 = {
8037         .fp_len = 24,
8038         .fp_proto = FIB_PROTOCOL_IP4,
8039         .fp_addr = nh_10_10_10_10,
8040     };
8041
8042     fib_table_entry_update_one_path(0, &pfx_10_10_10_10_s_24,
8043                                     FIB_SOURCE_INTERFACE,
8044                                     (FIB_ENTRY_FLAG_CONNECTED |
8045                                      FIB_ENTRY_FLAG_ATTACHED),
8046                                     DPO_PROTO_IP4,
8047                                     NULL,
8048                                     tm->hw[0]->sw_if_index,
8049                                     ~0, // invalid fib index
8050                                     1, // weight
8051                                     NULL,
8052                                     FIB_ROUTE_PATH_FLAG_NONE);
8053
8054     fib_prefix_t pfx_10_10_10_10_s_32 = {
8055         .fp_len = 32,
8056         .fp_proto = FIB_PROTOCOL_IP4,
8057         .fp_addr = nh_10_10_10_10,
8058     };
8059     fib_table_entry_update_one_path(0, &pfx_10_10_10_10_s_32,
8060                                     FIB_SOURCE_INTERFACE,
8061                                     (FIB_ENTRY_FLAG_CONNECTED |
8062                                      FIB_ENTRY_FLAG_LOCAL),
8063                                     DPO_PROTO_IP4,
8064                                     NULL,
8065                                     tm->hw[0]->sw_if_index,
8066                                     ~0, // invalid fib index
8067                                     1, // weight
8068                                     NULL,
8069                                     FIB_ROUTE_PATH_FLAG_NONE);
8070
8071     /*
8072      * A BFD session via a neighbour we do not yet know
8073      */
8074     bfd_session_t bfd_10_10_10_1 = {
8075         .udp = {
8076             .key = {
8077                 .fib_index = 0,
8078                 .peer_addr = nh_10_10_10_1,
8079             },
8080         },
8081         .hop_type = BFD_HOP_TYPE_MULTI,
8082         .local_state = BFD_STATE_init,
8083     };
8084
8085     fib_bfd_notify (BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_1);
8086
8087     /*
8088      * A new entry will be created that forwards via the adj
8089      */
8090     adj_index_t ai_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
8091                                                     VNET_LINK_IP4,
8092                                                     &nh_10_10_10_1,
8093                                                     tm->hw[0]->sw_if_index);
8094     fib_prefix_t pfx_10_10_10_1_s_32 = {
8095         .fp_addr = nh_10_10_10_1,
8096         .fp_len = 32,
8097         .fp_proto = FIB_PROTOCOL_IP4,
8098     };
8099     fib_test_lb_bucket_t adj_o_10_10_10_1 = {
8100         .type = FT_LB_ADJ,
8101         .adj = {
8102             .adj = ai_10_10_10_1,
8103         },
8104     };
8105
8106     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_1_s_32);
8107     FIB_TEST(!fib_test_validate_entry(fei,
8108                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8109                                       1,
8110                                       &adj_o_10_10_10_1),
8111              "BFD sourced %U via %U",
8112              format_fib_prefix, &pfx_10_10_10_1_s_32,
8113              format_ip_adjacency, ai_10_10_10_1, FORMAT_IP_ADJACENCY_NONE);
8114
8115     /*
8116      * Delete the BFD session. Expect the fib_entry to be removed
8117      */
8118     fib_bfd_notify (BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_1);
8119
8120     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_1_s_32);
8121     FIB_TEST(FIB_NODE_INDEX_INVALID == fei,
8122              "BFD sourced %U removed",
8123              format_fib_prefix, &pfx_10_10_10_1_s_32);
8124
8125     /*
8126      * Add the BFD source back
8127      */
8128     fib_bfd_notify (BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_1);
8129
8130     /*
8131      * source the entry via the ADJ fib
8132      */
8133     fei = fib_table_entry_path_add(0,
8134                                    &pfx_10_10_10_1_s_32,
8135                                    FIB_SOURCE_ADJ,
8136                                    FIB_ENTRY_FLAG_ATTACHED,
8137                                    DPO_PROTO_IP4,
8138                                    &nh_10_10_10_1,
8139                                    tm->hw[0]->sw_if_index,
8140                                    ~0, // invalid fib index
8141                                    1,
8142                                    NULL,
8143                                    FIB_ROUTE_PATH_FLAG_NONE);
8144
8145     /*
8146      * Delete the BFD session. Expect the fib_entry to remain
8147      */
8148     fib_bfd_notify (BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_1);
8149
8150     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_1_s_32);
8151     FIB_TEST(!fib_test_validate_entry(fei,
8152                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8153                                       1,
8154                                       &adj_o_10_10_10_1),
8155              "BFD sourced %U remains via %U",
8156              format_fib_prefix, &pfx_10_10_10_1_s_32,
8157              format_ip_adjacency, ai_10_10_10_1, FORMAT_IP_ADJACENCY_NONE);
8158
8159     /*
8160      * Add the BFD source back
8161      */
8162     fib_bfd_notify (BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_1);
8163
8164     /*
8165      * Create another ADJ FIB
8166      */
8167     fib_prefix_t pfx_10_10_10_2_s_32 = {
8168         .fp_addr = nh_10_10_10_2,
8169         .fp_len = 32,
8170         .fp_proto = FIB_PROTOCOL_IP4,
8171     };
8172     fib_table_entry_path_add(0,
8173                              &pfx_10_10_10_2_s_32,
8174                              FIB_SOURCE_ADJ,
8175                              FIB_ENTRY_FLAG_ATTACHED,
8176                              DPO_PROTO_IP4,
8177                              &nh_10_10_10_2,
8178                              tm->hw[0]->sw_if_index,
8179                              ~0, // invalid fib index
8180                              1,
8181                              NULL,
8182                              FIB_ROUTE_PATH_FLAG_NONE);
8183     /*
8184      * A BFD session for the new ADJ FIB
8185      */
8186     bfd_session_t bfd_10_10_10_2 = {
8187         .udp = {
8188             .key = {
8189                 .fib_index = 0,
8190                 .peer_addr = nh_10_10_10_2,
8191             },
8192         },
8193         .hop_type = BFD_HOP_TYPE_MULTI,
8194         .local_state = BFD_STATE_init,
8195     };
8196
8197     fib_bfd_notify (BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_2);
8198
8199     /*
8200      * remove the adj-fib source whilst the session is present
8201      * then add it back
8202      */
8203     fib_table_entry_delete(0, &pfx_10_10_10_2_s_32, FIB_SOURCE_ADJ);
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     /*
8217      * Before adding a recursive via the BFD tracked ADJ-FIBs,
8218      * bring one of the sessions UP, leave the other down
8219      */
8220     bfd_10_10_10_1.local_state = BFD_STATE_up;
8221     fib_bfd_notify (BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_1);
8222     bfd_10_10_10_2.local_state = BFD_STATE_down;
8223     fib_bfd_notify (BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_2);
8224
8225     /*
8226      * A recursive prefix via both of the ADJ FIBs
8227      */
8228     fib_prefix_t pfx_200_0_0_0_s_24 = {
8229         .fp_proto = FIB_PROTOCOL_IP4,
8230         .fp_len = 32,
8231         .fp_addr = {
8232             .ip4.as_u32 = clib_host_to_net_u32(0xc8000000),
8233         },
8234     };
8235     const dpo_id_t *dpo_10_10_10_1, *dpo_10_10_10_2;
8236
8237     dpo_10_10_10_1 =
8238         fib_entry_contribute_ip_forwarding(
8239             fib_table_lookup_exact_match(0, &pfx_10_10_10_1_s_32));
8240     dpo_10_10_10_2 =
8241         fib_entry_contribute_ip_forwarding(
8242             fib_table_lookup_exact_match(0, &pfx_10_10_10_2_s_32));
8243
8244     fib_test_lb_bucket_t lb_o_10_10_10_1 = {
8245         .type = FT_LB_O_LB,
8246         .lb = {
8247             .lb = dpo_10_10_10_1->dpoi_index,
8248         },
8249     };
8250     fib_test_lb_bucket_t lb_o_10_10_10_2 = {
8251         .type = FT_LB_O_LB,
8252         .lb = {
8253             .lb = dpo_10_10_10_2->dpoi_index,
8254         },
8255     };
8256
8257     /*
8258      * A prefix via the adj-fib that is BFD down => DROP
8259      */
8260     fei = fib_table_entry_path_add(0,
8261                                    &pfx_200_0_0_0_s_24,
8262                                    FIB_SOURCE_API,
8263                                    FIB_ENTRY_FLAG_NONE,
8264                                    DPO_PROTO_IP4,
8265                                    &nh_10_10_10_2,
8266                                    ~0, // recursive
8267                                    0, // default fib index
8268                                    1,
8269                                    NULL,
8270                                    FIB_ROUTE_PATH_FLAG_NONE);
8271     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
8272              "%U resolves via drop",
8273              format_fib_prefix, &pfx_200_0_0_0_s_24);
8274
8275     /*
8276      * add a path via the UP BFD adj-fib.
8277      *  we expect that the DOWN BFD ADJ FIB is not used.
8278      */
8279     fei = fib_table_entry_path_add(0,
8280                                    &pfx_200_0_0_0_s_24,
8281                                    FIB_SOURCE_API,
8282                                    FIB_ENTRY_FLAG_NONE,
8283                                    DPO_PROTO_IP4,
8284                                    &nh_10_10_10_1,
8285                                    ~0, // recursive
8286                                    0, // default fib index
8287                                    1,
8288                                    NULL,
8289                                    FIB_ROUTE_PATH_FLAG_NONE);
8290
8291     FIB_TEST(!fib_test_validate_entry(fei,
8292                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8293                                       1,
8294                                       &lb_o_10_10_10_1),
8295              "Recursive %U only UP BFD adj-fibs",
8296              format_fib_prefix, &pfx_200_0_0_0_s_24);
8297
8298     /*
8299      * Send a BFD state change to UP - both sessions are now up
8300      *  the recursive prefix should LB over both
8301      */
8302     bfd_10_10_10_2.local_state = BFD_STATE_up;
8303     fib_bfd_notify (BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_2);
8304
8305
8306     FIB_TEST(!fib_test_validate_entry(fei,
8307                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8308                                       2,
8309                                       &lb_o_10_10_10_1,
8310                                       &lb_o_10_10_10_2),
8311              "Recursive %U via both UP BFD adj-fibs",
8312              format_fib_prefix, &pfx_200_0_0_0_s_24);
8313
8314     /*
8315      * Send a BFD state change to DOWN
8316      *  the recursive prefix should exclude the down
8317      */
8318     bfd_10_10_10_2.local_state = BFD_STATE_down;
8319     fib_bfd_notify (BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_2);
8320
8321
8322     FIB_TEST(!fib_test_validate_entry(fei,
8323                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8324                                       1,
8325                                       &lb_o_10_10_10_1),
8326              "Recursive %U via only UP",
8327              format_fib_prefix, &pfx_200_0_0_0_s_24);
8328
8329     /*
8330      * Delete the BFD session while it is in the DOWN state.
8331      *  FIB should consider the entry's state as back up
8332      */
8333     fib_bfd_notify (BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_2);
8334
8335     FIB_TEST(!fib_test_validate_entry(fei,
8336                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8337                                       2,
8338                                       &lb_o_10_10_10_1,
8339                                       &lb_o_10_10_10_2),
8340              "Recursive %U via both UP BFD adj-fibs post down session delete",
8341              format_fib_prefix, &pfx_200_0_0_0_s_24);
8342
8343     /*
8344      * Delete the BFD other session while it is in the UP state.
8345      */
8346     fib_bfd_notify (BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_1);
8347
8348     FIB_TEST(!fib_test_validate_entry(fei,
8349                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8350                                       2,
8351                                       &lb_o_10_10_10_1,
8352                                       &lb_o_10_10_10_2),
8353              "Recursive %U via both UP BFD adj-fibs post up session delete",
8354              format_fib_prefix, &pfx_200_0_0_0_s_24);
8355
8356     /*
8357      * cleaup
8358      */
8359     fib_table_entry_delete(0, &pfx_200_0_0_0_s_24, FIB_SOURCE_API);
8360     fib_table_entry_delete(0, &pfx_10_10_10_1_s_32, FIB_SOURCE_ADJ);
8361     fib_table_entry_delete(0, &pfx_10_10_10_2_s_32, FIB_SOURCE_ADJ);
8362
8363     fib_table_entry_delete(0, &pfx_10_10_10_10_s_32, FIB_SOURCE_INTERFACE);
8364     fib_table_entry_delete(0, &pfx_10_10_10_10_s_24, FIB_SOURCE_INTERFACE);
8365
8366     adj_unlock(ai_10_10_10_1);
8367     /*
8368      * test no-one left behind
8369      */
8370     FIB_TEST((n_feis == fib_entry_pool_size()), "Entries gone");
8371     FIB_TEST(0 == adj_nbr_db_size(), "All adjacencies removed");
8372
8373     /*
8374      * Single-hop BFD tests
8375      */
8376     bfd_10_10_10_1.hop_type = BFD_HOP_TYPE_SINGLE;
8377     bfd_10_10_10_1.udp.key.sw_if_index = tm->hw[0]->sw_if_index;
8378
8379     adj_bfd_notify(BFD_LISTEN_EVENT_CREATE, &bfd_10_10_10_1);
8380
8381     ai_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
8382                                         VNET_LINK_IP4,
8383                                         &nh_10_10_10_1,
8384                                         tm->hw[0]->sw_if_index);
8385     /*
8386      * whilst the BFD session is not signalled, the adj is up
8387      */
8388     FIB_TEST(!adj_is_up(ai_10_10_10_1), "Adj state down on uninit session");
8389
8390     /*
8391      * bring the BFD session up
8392      */
8393     bfd_10_10_10_1.local_state = BFD_STATE_up;
8394     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_1);
8395     FIB_TEST(adj_is_up(ai_10_10_10_1), "Adj state up on UP session");
8396
8397     /*
8398      * bring the BFD session down
8399      */
8400     bfd_10_10_10_1.local_state = BFD_STATE_down;
8401     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_1);
8402     FIB_TEST(!adj_is_up(ai_10_10_10_1), "Adj state down on DOWN session");
8403
8404     /*
8405      * add an attached next hop FIB entry via the down adj
8406      */
8407     fib_prefix_t pfx_5_5_5_5_s_32 = {
8408         .fp_addr = {
8409             .ip4 = {
8410                 .as_u32 = clib_host_to_net_u32(0x05050505),
8411             },
8412         },
8413         .fp_len = 32,
8414         .fp_proto = FIB_PROTOCOL_IP4,
8415     };
8416
8417     fei = fib_table_entry_path_add(0,
8418                                    &pfx_5_5_5_5_s_32,
8419                                    FIB_SOURCE_CLI,
8420                                    FIB_ENTRY_FLAG_NONE,
8421                                    DPO_PROTO_IP4,
8422                                    &nh_10_10_10_1,
8423                                    tm->hw[0]->sw_if_index,
8424                                    ~0, // invalid fib index
8425                                    1,
8426                                    NULL,
8427                                    FIB_ROUTE_PATH_FLAG_NONE);
8428     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
8429              "%U resolves via drop",
8430              format_fib_prefix, &pfx_5_5_5_5_s_32);
8431
8432     /*
8433      * Add a path via an ADJ that is up
8434      */
8435     adj_index_t ai_10_10_10_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
8436                                                     VNET_LINK_IP4,
8437                                                     &nh_10_10_10_2,
8438                                                     tm->hw[0]->sw_if_index);
8439
8440     fib_test_lb_bucket_t adj_o_10_10_10_2 = {
8441         .type = FT_LB_ADJ,
8442         .adj = {
8443             .adj = ai_10_10_10_2,
8444         },
8445     };
8446     adj_o_10_10_10_1.adj.adj = ai_10_10_10_1;
8447
8448     fei = fib_table_entry_path_add(0,
8449                                    &pfx_5_5_5_5_s_32,
8450                                    FIB_SOURCE_CLI,
8451                                    FIB_ENTRY_FLAG_NONE,
8452                                    DPO_PROTO_IP4,
8453                                    &nh_10_10_10_2,
8454                                    tm->hw[0]->sw_if_index,
8455                                    ~0, // invalid fib index
8456                                    1,
8457                                    NULL,
8458                                    FIB_ROUTE_PATH_FLAG_NONE);
8459
8460     FIB_TEST(!fib_test_validate_entry(fei,
8461                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8462                                       1,
8463                                       &adj_o_10_10_10_2),
8464              "BFD sourced %U via %U",
8465              format_fib_prefix, &pfx_5_5_5_5_s_32,
8466              format_ip_adjacency, ai_10_10_10_2, FORMAT_IP_ADJACENCY_NONE);
8467
8468     /*
8469      * Bring up the down session - should now LB
8470      */
8471     bfd_10_10_10_1.local_state = BFD_STATE_up;
8472     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfd_10_10_10_1);
8473     FIB_TEST(!fib_test_validate_entry(fei,
8474                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8475                                       2,
8476                                       &adj_o_10_10_10_1,
8477                                       &adj_o_10_10_10_2),
8478              "BFD sourced %U via noth adjs",
8479              format_fib_prefix, &pfx_5_5_5_5_s_32);
8480
8481     /*
8482      * remove the BFD session state from the adj
8483      */
8484     adj_bfd_notify(BFD_LISTEN_EVENT_DELETE, &bfd_10_10_10_1);
8485
8486     /*
8487      * clean-up
8488      */
8489     fib_table_entry_delete(0, &pfx_5_5_5_5_s_32, FIB_SOURCE_CLI);
8490     adj_unlock(ai_10_10_10_1);
8491     adj_unlock(ai_10_10_10_2);
8492
8493     /*
8494      * test no-one left behind
8495      */
8496     FIB_TEST((n_feis == fib_entry_pool_size()), "Entries gone");
8497     FIB_TEST(0 == adj_nbr_db_size(), "All adjacencies removed");
8498
8499     return (res);
8500 }
8501
8502 static int
8503 lfib_test (void)
8504 {
8505     const mpls_label_t deag_label = 50;
8506     adj_index_t ai_mpls_10_10_10_1;
8507     dpo_id_t dpo = DPO_INVALID;
8508     const u32 lfib_index = 0;
8509     const u32 fib_index = 0;
8510     const dpo_id_t *dpo1;
8511     fib_node_index_t lfe;
8512     lookup_dpo_t *lkd;
8513     int lb_count, res;
8514     test_main_t *tm;
8515
8516     res = 0;
8517     tm = &test_main;
8518     lb_count = pool_elts(load_balance_pool);
8519
8520     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
8521              adj_nbr_db_size());
8522
8523     /*
8524      * MPLS enable an interface so we get the MPLS table created
8525      */
8526     mpls_table_create(MPLS_FIB_DEFAULT_TABLE_ID, FIB_SOURCE_API, NULL);
8527     mpls_sw_interface_enable_disable(&mpls_main,
8528                                      tm->hw[0]->sw_if_index,
8529                                      1, 1);
8530
8531     ip46_address_t nh_10_10_10_1 = {
8532         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
8533     };
8534     ai_mpls_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
8535                                              VNET_LINK_MPLS,
8536                                              &nh_10_10_10_1,
8537                                              tm->hw[0]->sw_if_index);
8538
8539     /*
8540      * Test the specials stack properly.
8541      */
8542     fib_prefix_t exp_null_v6_pfx = {
8543         .fp_proto = FIB_PROTOCOL_MPLS,
8544         .fp_eos = MPLS_EOS,
8545         .fp_label = MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL,
8546         .fp_payload_proto = DPO_PROTO_IP6,
8547     };
8548     lfe = fib_table_lookup(lfib_index, &exp_null_v6_pfx);
8549     FIB_TEST((FIB_NODE_INDEX_INVALID != lfe),
8550              "%U/%U present",
8551              format_mpls_unicast_label, MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL,
8552              format_mpls_eos_bit, MPLS_EOS);
8553     fib_entry_contribute_forwarding(lfe,
8554                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
8555                                     &dpo);
8556     dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
8557     lkd = lookup_dpo_get(dpo1->dpoi_index);
8558
8559     FIB_TEST((fib_index == lkd->lkd_fib_index),
8560              "%U/%U is deag in %d %U",
8561              format_mpls_unicast_label, deag_label,
8562              format_mpls_eos_bit, MPLS_EOS,
8563              lkd->lkd_fib_index,
8564              format_dpo_id, &dpo, 0);
8565     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
8566              "%U/%U is dst deag",
8567              format_mpls_unicast_label, deag_label,
8568              format_mpls_eos_bit, MPLS_EOS);
8569     FIB_TEST((LOOKUP_TABLE_FROM_INPUT_INTERFACE == lkd->lkd_table),
8570              "%U/%U is lookup in interface's table",
8571              format_mpls_unicast_label, deag_label,
8572              format_mpls_eos_bit, MPLS_EOS);
8573     FIB_TEST((DPO_PROTO_IP6 == lkd->lkd_proto),
8574              "%U/%U is %U dst deag",
8575              format_mpls_unicast_label, deag_label,
8576              format_mpls_eos_bit, MPLS_EOS,
8577              format_dpo_proto, lkd->lkd_proto);
8578
8579     /*
8580      * A route deag route for EOS
8581      */
8582     fib_prefix_t pfx = {
8583         .fp_proto = FIB_PROTOCOL_MPLS,
8584         .fp_eos = MPLS_EOS,
8585         .fp_label = deag_label,
8586         .fp_payload_proto = DPO_PROTO_IP4,
8587     };
8588     mpls_disp_dpo_t *mdd;
8589     lfe = fib_table_entry_path_add(lfib_index,
8590                                    &pfx,
8591                                    FIB_SOURCE_CLI,
8592                                    FIB_ENTRY_FLAG_NONE,
8593                                    DPO_PROTO_IP4,
8594                                    &zero_addr,
8595                                    ~0,
8596                                    fib_index,
8597                                    1,
8598                                    NULL,
8599                                    FIB_ROUTE_PATH_FLAG_NONE);
8600
8601     FIB_TEST((lfe == fib_table_lookup(lfib_index, &pfx)),
8602              "%U/%U present",
8603              format_mpls_unicast_label, deag_label,
8604              format_mpls_eos_bit, MPLS_EOS);
8605
8606     fib_entry_contribute_forwarding(lfe,
8607                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
8608                                     &dpo);
8609     dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
8610     mdd = mpls_disp_dpo_get(dpo1->dpoi_index);
8611
8612     FIB_TEST((FIB_MPLS_LSP_MODE_PIPE == mdd->mdd_mode),
8613              "%U/%U disp is pipe mode",
8614              format_mpls_unicast_label, deag_label,
8615              format_mpls_eos_bit, MPLS_EOS);
8616
8617     lkd = lookup_dpo_get(mdd->mdd_dpo.dpoi_index);
8618
8619     FIB_TEST((fib_index == lkd->lkd_fib_index),
8620              "%U/%U is deag in %d %U",
8621              format_mpls_unicast_label, deag_label,
8622              format_mpls_eos_bit, MPLS_EOS,
8623              lkd->lkd_fib_index,
8624              format_dpo_id, &dpo, 0);
8625     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
8626              "%U/%U is dst deag",
8627              format_mpls_unicast_label, deag_label,
8628              format_mpls_eos_bit, MPLS_EOS);
8629     FIB_TEST((DPO_PROTO_IP4 == lkd->lkd_proto),
8630              "%U/%U is %U dst deag",
8631              format_mpls_unicast_label, deag_label,
8632              format_mpls_eos_bit, MPLS_EOS,
8633              format_dpo_proto, lkd->lkd_proto);
8634
8635     fib_table_entry_delete_index(lfe, FIB_SOURCE_CLI);
8636
8637     FIB_TEST((FIB_NODE_INDEX_INVALID == fib_table_lookup(lfib_index,
8638                                                          &pfx)),
8639               "%U/%U not present",
8640               format_mpls_unicast_label, deag_label,
8641               format_mpls_eos_bit, MPLS_EOS);
8642     dpo_reset(&dpo);
8643
8644     /*
8645      * A route deag route for EOS with LSP mode uniform
8646      */
8647     fib_mpls_label_t *l_pops = NULL, l_pop = {
8648         .fml_value = MPLS_LABEL_POP,
8649         .fml_mode = FIB_MPLS_LSP_MODE_UNIFORM,
8650     };
8651     vec_add1(l_pops, l_pop);
8652     lfe = fib_table_entry_path_add(lfib_index,
8653                                    &pfx,
8654                                    FIB_SOURCE_CLI,
8655                                    FIB_ENTRY_FLAG_NONE,
8656                                    DPO_PROTO_IP4,
8657                                    &zero_addr,
8658                                    ~0,
8659                                    fib_index,
8660                                    1,
8661                                    l_pops,
8662                                    FIB_ROUTE_PATH_FLAG_NONE);
8663
8664     FIB_TEST((lfe == fib_table_lookup(lfib_index, &pfx)),
8665               "%U/%U present",
8666               format_mpls_unicast_label, deag_label,
8667               format_mpls_eos_bit, MPLS_EOS);
8668
8669     fib_entry_contribute_forwarding(lfe,
8670                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
8671                                     &dpo);
8672     dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
8673     mdd = mpls_disp_dpo_get(dpo1->dpoi_index);
8674
8675     FIB_TEST((FIB_MPLS_LSP_MODE_UNIFORM == mdd->mdd_mode),
8676              "%U/%U disp is uniform mode",
8677              format_mpls_unicast_label, deag_label,
8678              format_mpls_eos_bit, MPLS_EOS);
8679
8680     lkd = lookup_dpo_get(mdd->mdd_dpo.dpoi_index);
8681
8682     FIB_TEST((fib_index == lkd->lkd_fib_index),
8683               "%U/%U is deag in %d %U",
8684              format_mpls_unicast_label, deag_label,
8685              format_mpls_eos_bit, MPLS_EOS,
8686              lkd->lkd_fib_index,
8687              format_dpo_id, &dpo, 0);
8688     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
8689              "%U/%U is dst deag",
8690              format_mpls_unicast_label, deag_label,
8691              format_mpls_eos_bit, MPLS_EOS);
8692     FIB_TEST((DPO_PROTO_IP4 == lkd->lkd_proto),
8693              "%U/%U is %U dst deag",
8694              format_mpls_unicast_label, deag_label,
8695              format_mpls_eos_bit, MPLS_EOS,
8696              format_dpo_proto, lkd->lkd_proto);
8697
8698     fib_table_entry_delete_index(lfe, FIB_SOURCE_CLI);
8699
8700     FIB_TEST((FIB_NODE_INDEX_INVALID == fib_table_lookup(lfib_index,
8701                                                          &pfx)),
8702               "%U/%U not present",
8703               format_mpls_unicast_label, deag_label,
8704               format_mpls_eos_bit, MPLS_EOS);
8705     dpo_reset(&dpo);
8706
8707     /*
8708      * A route deag route for non-EOS
8709      */
8710     pfx.fp_eos = MPLS_NON_EOS;
8711     lfe = fib_table_entry_path_add(lfib_index,
8712                                    &pfx,
8713                                    FIB_SOURCE_CLI,
8714                                    FIB_ENTRY_FLAG_NONE,
8715                                    DPO_PROTO_IP4,
8716                                    &zero_addr,
8717                                    ~0,
8718                                    lfib_index,
8719                                    1,
8720                                    NULL,
8721                                    FIB_ROUTE_PATH_FLAG_NONE);
8722
8723     FIB_TEST((lfe == fib_table_lookup(lfib_index, &pfx)),
8724              "%U/%U present",
8725              format_mpls_unicast_label, deag_label,
8726              format_mpls_eos_bit, MPLS_NON_EOS);
8727
8728     fib_entry_contribute_forwarding(lfe,
8729                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
8730                                     &dpo);
8731     dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
8732     lkd = lookup_dpo_get(dpo1->dpoi_index);
8733
8734     FIB_TEST((fib_index == lkd->lkd_fib_index),
8735              "%U/%U is deag in %d %U",
8736              format_mpls_unicast_label, deag_label,
8737              format_mpls_eos_bit, MPLS_NON_EOS,
8738              lkd->lkd_fib_index,
8739              format_dpo_id, &dpo, 0);
8740     FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
8741              "%U/%U is dst deag",
8742              format_mpls_unicast_label, deag_label,
8743              format_mpls_eos_bit, MPLS_NON_EOS);
8744
8745     FIB_TEST((DPO_PROTO_MPLS == lkd->lkd_proto),
8746              "%U/%U is %U dst deag",
8747              format_mpls_unicast_label, deag_label,
8748              format_mpls_eos_bit, MPLS_NON_EOS,
8749              format_dpo_proto, lkd->lkd_proto);
8750
8751     fib_table_entry_delete_index(lfe, FIB_SOURCE_CLI);
8752
8753     FIB_TEST((FIB_NODE_INDEX_INVALID == fib_table_lookup(lfib_index,
8754                                                          &pfx)),
8755              "%U/%U not present",
8756              format_mpls_unicast_label, deag_label,
8757              format_mpls_eos_bit, MPLS_EOS);
8758
8759     dpo_reset(&dpo);
8760
8761     /*
8762      * An MPLS x-connect
8763      */
8764     fib_prefix_t pfx_1200 = {
8765         .fp_len = 21,
8766         .fp_proto = FIB_PROTOCOL_MPLS,
8767         .fp_label = 1200,
8768         .fp_eos = MPLS_NON_EOS,
8769     };
8770     fib_test_lb_bucket_t neos_o_10_10_10_1 = {
8771         .type = FT_LB_LABEL_STACK_O_ADJ,
8772         .label_stack_o_adj = {
8773             .adj = ai_mpls_10_10_10_1,
8774             .label_stack_size = 4,
8775             .label_stack = {
8776                 200, 300, 400, 500,
8777             },
8778             .eos = MPLS_NON_EOS,
8779         },
8780     };
8781     dpo_id_t neos_1200 = DPO_INVALID;
8782     dpo_id_t ip_1200 = DPO_INVALID;
8783     fib_mpls_label_t *l200 = NULL;
8784     u32 ii;
8785     for (ii = 0; ii < 4; ii++)
8786     {
8787         fib_mpls_label_t fml = {
8788             .fml_value = 200 + (ii * 100),
8789         };
8790         vec_add1(l200, fml);
8791     };
8792
8793     lfe = fib_table_entry_update_one_path(fib_index,
8794                                           &pfx_1200,
8795                                           FIB_SOURCE_API,
8796                                           FIB_ENTRY_FLAG_NONE,
8797                                           DPO_PROTO_IP4,
8798                                           &nh_10_10_10_1,
8799                                           tm->hw[0]->sw_if_index,
8800                                           ~0, // invalid fib index
8801                                           1,
8802                                           l200,
8803                                           FIB_ROUTE_PATH_FLAG_NONE);
8804
8805     FIB_TEST(!fib_test_validate_entry(lfe,
8806                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
8807                                       1,
8808                                       &neos_o_10_10_10_1),
8809              "1200/0 LB 1 buckets via: "
8810              "adj 10.10.11.1");
8811
8812     /*
8813      * A recursive route via the MPLS x-connect
8814      */
8815     fib_prefix_t pfx_2_2_2_3_s_32 = {
8816         .fp_len = 32,
8817         .fp_proto = FIB_PROTOCOL_IP4,
8818         .fp_addr = {
8819             .ip4.as_u32 = clib_host_to_net_u32(0x02020203),
8820         },
8821     };
8822     fib_route_path_t *rpaths = NULL, rpath = {
8823         .frp_proto = DPO_PROTO_MPLS,
8824         .frp_local_label = 1200,
8825         .frp_eos = MPLS_NON_EOS,
8826         .frp_sw_if_index = ~0, // recurive
8827         .frp_fib_index = 0, // Default MPLS fib
8828         .frp_weight = 1,
8829         .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
8830         .frp_label_stack = NULL,
8831     };
8832     vec_add1(rpaths, rpath);
8833
8834     fib_table_entry_path_add2(fib_index,
8835                               &pfx_2_2_2_3_s_32,
8836                               FIB_SOURCE_API,
8837                               FIB_ENTRY_FLAG_NONE,
8838                               rpaths);
8839
8840     /*
8841      * A labelled recursive route via the MPLS x-connect
8842      */
8843     fib_prefix_t pfx_2_2_2_4_s_32 = {
8844         .fp_len = 32,
8845         .fp_proto = FIB_PROTOCOL_IP4,
8846         .fp_addr = {
8847             .ip4.as_u32 = clib_host_to_net_u32(0x02020204),
8848         },
8849     };
8850     fib_mpls_label_t *l999 = NULL, fml_999 = {
8851         .fml_value = 999,
8852     };
8853     vec_add1(l999, fml_999);
8854     rpaths[0].frp_label_stack = l999,
8855
8856         fib_table_entry_path_add2(fib_index,
8857                                   &pfx_2_2_2_4_s_32,
8858                                   FIB_SOURCE_API,
8859                                   FIB_ENTRY_FLAG_NONE,
8860                                   rpaths);
8861
8862     fib_entry_contribute_forwarding(fib_table_lookup(fib_index, &pfx_1200),
8863                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8864                                     &ip_1200);
8865     fib_entry_contribute_forwarding(fib_table_lookup(fib_index, &pfx_1200),
8866                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
8867                                     &neos_1200);
8868
8869     fib_test_lb_bucket_t ip_o_1200 = {
8870         .type = FT_LB_O_LB,
8871         .lb = {
8872             .lb = ip_1200.dpoi_index,
8873         },
8874     };
8875     fib_test_lb_bucket_t mpls_o_1200 = {
8876         .type = FT_LB_LABEL_O_LB,
8877         .label_o_lb = {
8878             .lb = neos_1200.dpoi_index,
8879             .label = 999,
8880             .eos = MPLS_EOS,
8881         },
8882     };
8883
8884     lfe = fib_table_lookup(fib_index, &pfx_2_2_2_3_s_32);
8885     FIB_TEST(!fib_test_validate_entry(lfe,
8886                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8887                                       1,
8888                                       &ip_o_1200),
8889              "2.2.2.2.3/32 LB 1 buckets via: label 1200 EOS");
8890     lfe = fib_table_lookup(fib_index, &pfx_2_2_2_4_s_32);
8891     FIB_TEST(!fib_test_validate_entry(lfe,
8892                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8893                                       1,
8894                                       &mpls_o_1200),
8895              "2.2.2.2.4/32 LB 1 buckets via: label 1200 non-EOS");
8896
8897     fib_table_entry_delete(fib_index, &pfx_1200, FIB_SOURCE_API);
8898     fib_table_entry_delete(fib_index, &pfx_2_2_2_3_s_32, FIB_SOURCE_API);
8899     fib_table_entry_delete(fib_index, &pfx_2_2_2_4_s_32, FIB_SOURCE_API);
8900
8901     dpo_reset(&neos_1200);
8902     dpo_reset(&ip_1200);
8903
8904     /*
8905      * A recursive via a label that does not exist
8906      */
8907     fib_test_lb_bucket_t bucket_drop = {
8908         .type = FT_LB_DROP,
8909         .special = {
8910             .adj = DPO_PROTO_IP4,
8911         },
8912     };
8913     fib_test_lb_bucket_t mpls_bucket_drop = {
8914         .type = FT_LB_DROP,
8915         .special = {
8916             .adj = DPO_PROTO_MPLS,
8917         },
8918     };
8919
8920     rpaths[0].frp_label_stack = NULL;
8921     lfe = fib_table_entry_path_add2(fib_index,
8922                                     &pfx_2_2_2_4_s_32,
8923                                     FIB_SOURCE_API,
8924                                     FIB_ENTRY_FLAG_NONE,
8925                                     rpaths);
8926
8927     fib_entry_contribute_forwarding(fib_table_lookup(fib_index, &pfx_1200),
8928                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8929                                     &ip_1200);
8930     ip_o_1200.lb.lb = ip_1200.dpoi_index;
8931
8932     FIB_TEST(!fib_test_validate_entry(lfe,
8933                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8934                                       1,
8935                                       &bucket_drop),
8936              "2.2.2.2.4/32 LB 1 buckets via: drop");
8937     lfe = fib_table_lookup(fib_index, &pfx_1200);
8938     FIB_TEST(!fib_test_validate_entry(lfe,
8939                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
8940                                       1,
8941                                       &bucket_drop),
8942              "1200/neos LB 1 buckets via: ip4-DROP");
8943     FIB_TEST(!fib_test_validate_entry(lfe,
8944                                       FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
8945                                       1,
8946                                       &mpls_bucket_drop),
8947              "1200/neos LB 1 buckets via: mpls-DROP");
8948
8949     fib_table_entry_delete(fib_index, &pfx_2_2_2_4_s_32, FIB_SOURCE_API);
8950
8951     dpo_reset(&ip_1200);
8952
8953     /*
8954      * An rx-interface route.
8955      *  like the tail of an mcast LSP
8956      */
8957     dpo_id_t idpo = DPO_INVALID;
8958
8959     interface_rx_dpo_add_or_lock(DPO_PROTO_IP4,
8960                                  tm->hw[0]->sw_if_index,
8961                                  &idpo);
8962
8963     fib_prefix_t pfx_2500 = {
8964         .fp_len = 21,
8965         .fp_proto = FIB_PROTOCOL_MPLS,
8966         .fp_label = 2500,
8967         .fp_eos = MPLS_EOS,
8968         .fp_payload_proto = DPO_PROTO_IP4,
8969     };
8970     fib_test_lb_bucket_t rx_intf_0 = {
8971         .type = FT_LB_INTF,
8972         .adj = {
8973             .adj = idpo.dpoi_index,
8974         },
8975     };
8976
8977     lfe = fib_table_entry_update_one_path(fib_index,
8978                                           &pfx_2500,
8979                                           FIB_SOURCE_API,
8980                                           FIB_ENTRY_FLAG_NONE,
8981                                           DPO_PROTO_IP4,
8982                                           NULL,
8983                                           tm->hw[0]->sw_if_index,
8984                                           ~0, // invalid fib index
8985                                           0,
8986                                           NULL,
8987                                           FIB_ROUTE_PATH_INTF_RX);
8988     FIB_TEST(!fib_test_validate_entry(lfe,
8989                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
8990                                       1,
8991                                       &rx_intf_0),
8992              "2500 rx-interface 0");
8993     fib_table_entry_delete(fib_index, &pfx_2500, FIB_SOURCE_API);
8994
8995     /*
8996      * An MPLS mulicast entry
8997      */
8998     fib_prefix_t pfx_3500 = {
8999         .fp_len = 21,
9000         .fp_proto = FIB_PROTOCOL_MPLS,
9001         .fp_label = 3500,
9002         .fp_eos = MPLS_EOS,
9003         .fp_payload_proto = DPO_PROTO_IP4,
9004     };
9005     fib_test_rep_bucket_t mc_0 = {
9006         .type = FT_REP_LABEL_O_ADJ,
9007         .label_o_adj = {
9008             .adj = ai_mpls_10_10_10_1,
9009             .label = 3300,
9010             .eos = MPLS_EOS,
9011         },
9012     };
9013     fib_test_rep_bucket_t mc_intf_0 = {
9014         .type = FT_REP_INTF,
9015         .adj = {
9016             .adj = idpo.dpoi_index,
9017         },
9018     };
9019     fib_mpls_label_t *l3300 = NULL, fml_3300 = {
9020         .fml_value = 3300,
9021     };
9022     vec_add1(l3300, fml_3300);
9023
9024     lfe = fib_table_entry_update_one_path(lfib_index,
9025                                           &pfx_3500,
9026                                           FIB_SOURCE_API,
9027                                           FIB_ENTRY_FLAG_MULTICAST,
9028                                           DPO_PROTO_IP4,
9029                                           &nh_10_10_10_1,
9030                                           tm->hw[0]->sw_if_index,
9031                                           ~0, // invalid fib index
9032                                           1,
9033                                           l3300,
9034                                           FIB_ROUTE_PATH_FLAG_NONE);
9035     FIB_TEST(!fib_test_validate_entry(lfe,
9036                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
9037                                       1,
9038                                       &mc_0),
9039              "3500 via replicate over 10.10.10.1");
9040
9041     /*
9042      * MPLS Bud-node. Add a replication via an interface-receieve path
9043      */
9044     lfe = fib_table_entry_path_add(lfib_index,
9045                                    &pfx_3500,
9046                                    FIB_SOURCE_API,
9047                                    FIB_ENTRY_FLAG_MULTICAST,
9048                                    DPO_PROTO_IP4,
9049                                    NULL,
9050                                    tm->hw[0]->sw_if_index,
9051                                    ~0, // invalid fib index
9052                                    0,
9053                                    NULL,
9054                                    FIB_ROUTE_PATH_INTF_RX);
9055     FIB_TEST(!fib_test_validate_entry(lfe,
9056                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
9057                                       2,
9058                                       &mc_0,
9059                                       &mc_intf_0),
9060              "3500 via replicate over 10.10.10.1 and interface-rx");
9061
9062     /*
9063      * Add a replication via an interface-free for-us path
9064      */
9065     fib_test_rep_bucket_t mc_disp = {
9066         .type = FT_REP_DISP_MFIB_LOOKUP,
9067         .adj = {
9068             .adj = idpo.dpoi_index,
9069         },
9070     };
9071     lfe = fib_table_entry_path_add(lfib_index,
9072                                    &pfx_3500,
9073                                    FIB_SOURCE_API,
9074                                    FIB_ENTRY_FLAG_MULTICAST,
9075                                    DPO_PROTO_IP4,
9076                                    NULL,
9077                                    5, // rpf-id
9078                                    0, // default table
9079                                    0,
9080                                    NULL,
9081                                    FIB_ROUTE_PATH_RPF_ID);
9082     FIB_TEST(!fib_test_validate_entry(lfe,
9083                                       FIB_FORW_CHAIN_TYPE_MPLS_EOS,
9084                                       3,
9085                                       &mc_0,
9086                                       &mc_disp,
9087                                       &mc_intf_0),
9088              "3500 via replicate over 10.10.10.1 and interface-rx");
9089
9090
9091
9092     fib_table_entry_delete(fib_index, &pfx_3500, FIB_SOURCE_API);
9093     dpo_reset(&idpo);
9094
9095     /*
9096      * cleanup
9097      */
9098     mpls_sw_interface_enable_disable(&mpls_main,
9099                                      tm->hw[0]->sw_if_index,
9100                                      0, 1);
9101     mpls_table_delete(MPLS_FIB_DEFAULT_TABLE_ID, FIB_SOURCE_API);
9102
9103     FIB_TEST(0 == pool_elts(mpls_disp_dpo_pool),
9104              "mpls_disp_dpo resources freed %d of %d",
9105              0, pool_elts(mpls_disp_dpo_pool));
9106     FIB_TEST(lb_count == pool_elts(load_balance_pool),
9107              "Load-balance resources freed %d of %d",
9108              lb_count, pool_elts(load_balance_pool));
9109     FIB_TEST(0 == pool_elts(interface_rx_dpo_pool),
9110              "interface_rx_dpo resources freed %d of %d",
9111              0, pool_elts(interface_rx_dpo_pool));
9112
9113     return (res);
9114 }
9115
9116 static int
9117 fib_test_inherit (void)
9118 {
9119     fib_node_index_t fei;
9120     int n_feis, res, i;
9121     test_main_t *tm;
9122     ip4_main_t *im4;
9123     ip6_main_t *im6;
9124
9125     tm = &test_main;
9126     im4 = &ip4_main;
9127     im6 = &ip6_main;
9128     res = 0;
9129
9130     for (i = 0; i <= 2; i++)
9131     {
9132         im4->fib_index_by_sw_if_index[tm->hw[i]->sw_if_index] = 0;
9133         im6->fib_index_by_sw_if_index[tm->hw[i]->sw_if_index] = 0;
9134     }
9135     n_feis = fib_entry_pool_size();
9136
9137     const ip46_address_t nh_10_10_10_1 = {
9138         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
9139     };
9140     const ip46_address_t nh_10_10_10_2 = {
9141         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
9142     };
9143     const ip46_address_t nh_10_10_10_3 = {
9144         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a03),
9145     };
9146     const ip46_address_t nh_10_10_10_16 = {
9147         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a10),
9148     };
9149     const ip46_address_t nh_10_10_10_20 = {
9150         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a14),
9151     };
9152     const ip46_address_t nh_10_10_10_21 = {
9153         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a15),
9154     };
9155     const ip46_address_t nh_10_10_10_22 = {
9156         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a16),
9157     };
9158     const ip46_address_t nh_10_10_10_255 = {
9159         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0aff),
9160     };
9161     const ip46_address_t nh_10_10_10_0 = {
9162         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a00),
9163     };
9164     const ip46_address_t nh_10_10_0_0 = {
9165         .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0000),
9166     };
9167     const ip46_address_t nh_11_11_11_11 = {
9168         .ip4.as_u32 = clib_host_to_net_u32(0x0b0b0b0b),
9169     };
9170     const ip46_address_t nh_11_11_11_0 = {
9171         .ip4.as_u32 = clib_host_to_net_u32(0x0b0b0b00),
9172     };
9173
9174     /*
9175      * prefixes at the base of a sub-tree
9176      */
9177     const fib_prefix_t pfx_10_10_10_21_s_32 = {
9178         .fp_len = 32,
9179         .fp_proto = FIB_PROTOCOL_IP4,
9180         .fp_addr = nh_10_10_10_21,
9181     };
9182     const fib_prefix_t pfx_10_10_10_22_s_32 = {
9183         .fp_len = 32,
9184         .fp_proto = FIB_PROTOCOL_IP4,
9185         .fp_addr = nh_10_10_10_22,
9186     };
9187     const fib_prefix_t pfx_10_10_10_255_s_32 = {
9188         .fp_len = 32,
9189         .fp_proto = FIB_PROTOCOL_IP4,
9190         .fp_addr = nh_10_10_10_255,
9191     };
9192     const u32 N_PLS = fib_path_list_pool_size();
9193
9194     fib_table_entry_special_add(0,
9195                                 &pfx_10_10_10_21_s_32,
9196                                 FIB_SOURCE_CLI,
9197                                 FIB_ENTRY_FLAG_DROP);
9198     fib_table_entry_special_add(0,
9199                                 &pfx_10_10_10_22_s_32,
9200                                 FIB_SOURCE_CLI,
9201                                 FIB_ENTRY_FLAG_DROP);
9202     fib_table_entry_special_add(0,
9203                                 &pfx_10_10_10_255_s_32,
9204                                 FIB_SOURCE_CLI,
9205                                 FIB_ENTRY_FLAG_DROP);
9206
9207     /*
9208      * source an entry that pushes its state down the sub-tree
9209      */
9210     const fib_prefix_t pfx_10_10_10_16_s_28 = {
9211         .fp_len = 28,
9212         .fp_proto = FIB_PROTOCOL_IP4,
9213         .fp_addr = nh_10_10_10_16,
9214     };
9215     fib_table_entry_update_one_path(0,
9216                                     &pfx_10_10_10_16_s_28,
9217                                     FIB_SOURCE_API,
9218                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9219                                     DPO_PROTO_IP4,
9220                                     &nh_10_10_10_1,
9221                                     tm->hw[0]->sw_if_index,
9222                                     ~0,
9223                                     1,
9224                                     NULL,
9225                                     FIB_ROUTE_PATH_FLAG_NONE);
9226
9227     /*
9228      * this covering entry and all those below it should have
9229      * the same forwarding information.
9230      */
9231     adj_index_t ai_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
9232                                                     VNET_LINK_IP4,
9233                                                     &nh_10_10_10_1,
9234                                                     tm->hw[0]->sw_if_index);
9235     fib_test_lb_bucket_t adj_o_10_10_10_1 = {
9236         .type = FT_LB_ADJ,
9237         .adj = {
9238             .adj = ai_10_10_10_1,
9239         },
9240     };
9241
9242     fei = fib_table_lookup(0, &pfx_10_10_10_16_s_28);
9243     FIB_TEST(!fib_test_validate_entry(fei,
9244                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9245                                       1,
9246                                       &adj_o_10_10_10_1),
9247              "%U via 10.10.10.1",
9248              format_fib_prefix, &pfx_10_10_10_16_s_28);
9249     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9250     FIB_TEST(!fib_test_validate_entry(fei,
9251                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9252                                       1,
9253                                       &adj_o_10_10_10_1),
9254              "%U via 10.10.10.1",
9255              format_fib_prefix, &pfx_10_10_10_21_s_32);
9256     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9257     FIB_TEST(!fib_test_validate_entry(fei,
9258                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9259                                       1,
9260                                       &adj_o_10_10_10_1),
9261              "%U via 10.10.10.1",
9262              format_fib_prefix, &pfx_10_10_10_22_s_32);
9263     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9264     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9265              "%U resolves via drop",
9266              format_fib_prefix, &pfx_10_10_10_255_s_32);
9267
9268     /*
9269      * remove the inherting cover - covereds go back to drop
9270      */
9271     fib_table_entry_delete(0, &pfx_10_10_10_16_s_28, FIB_SOURCE_API);
9272
9273     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9274     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9275              "%U resolves via drop",
9276              format_fib_prefix, &pfx_10_10_10_21_s_32);
9277
9278     /*
9279      * source an entry that pushes its state down the sub-tree
9280      */
9281     const fib_prefix_t pfx_10_10_10_0_s_24 = {
9282         .fp_len = 24,
9283         .fp_proto = FIB_PROTOCOL_IP4,
9284         .fp_addr = nh_10_10_10_0,
9285     };
9286     fib_table_entry_update_one_path(0,
9287                                     &pfx_10_10_10_0_s_24,
9288                                     FIB_SOURCE_API,
9289                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9290                                     DPO_PROTO_IP4,
9291                                     &nh_10_10_10_1,
9292                                     tm->hw[0]->sw_if_index,
9293                                     ~0,
9294                                     1,
9295                                     NULL,
9296                                     FIB_ROUTE_PATH_FLAG_NONE);
9297
9298     /*
9299      * whole sub-tree now covered
9300      */
9301     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9302     FIB_TEST(!fib_test_validate_entry(fei,
9303                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9304                                       1,
9305                                       &adj_o_10_10_10_1),
9306              "%U via 10.10.10.1",
9307              format_fib_prefix, &pfx_10_10_10_0_s_24);
9308     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9309     FIB_TEST(!fib_test_validate_entry(fei,
9310                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9311                                       1,
9312                                       &adj_o_10_10_10_1),
9313              "%U via 10.10.10.1",
9314              format_fib_prefix, &pfx_10_10_10_21_s_32);
9315     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9316     FIB_TEST(!fib_test_validate_entry(fei,
9317                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9318                                       1,
9319                                       &adj_o_10_10_10_1),
9320              "%U via 10.10.10.1",
9321              format_fib_prefix, &pfx_10_10_10_22_s_32);
9322     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9323     FIB_TEST(!fib_test_validate_entry(fei,
9324                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9325                                       1,
9326                                       &adj_o_10_10_10_1),
9327              "%U via 10.10.10.1",
9328              format_fib_prefix, &pfx_10_10_10_255_s_32);
9329
9330     /*
9331      * insert a more specific into the sub-tree - expect inheritance
9332      *  this one is directly covered by the root
9333      */
9334     fib_table_entry_special_add(0,
9335                                 &pfx_10_10_10_16_s_28,
9336                                 FIB_SOURCE_CLI,
9337                                 FIB_ENTRY_FLAG_DROP);
9338     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
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_16_s_28);
9345
9346     /*
9347      * insert a more specific into the sub-tree - expect inheritance
9348      *  this one is indirectly covered by the root
9349      */
9350     const fib_prefix_t pfx_10_10_10_20_s_30 = {
9351         .fp_len = 30,
9352         .fp_proto = FIB_PROTOCOL_IP4,
9353         .fp_addr = nh_10_10_10_20,
9354     };
9355     fib_table_entry_special_add(0,
9356                                 &pfx_10_10_10_20_s_30,
9357                                 FIB_SOURCE_CLI,
9358                                 FIB_ENTRY_FLAG_DROP);
9359     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_20_s_30);
9360     FIB_TEST(!fib_test_validate_entry(fei,
9361                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9362                                       1,
9363                                       &adj_o_10_10_10_1),
9364              "%U via 10.10.10.1",
9365              format_fib_prefix, &pfx_10_10_10_20_s_30);
9366
9367     /*
9368      * remove the prefix from the middle of the sub-tree
9369      *  the inherited source will be the only one remaining - expect
9370      *  it to be withdrawn and hence the prefix is removed.
9371      */
9372     fib_table_entry_special_remove(0,
9373                                    &pfx_10_10_10_20_s_30,
9374                                    FIB_SOURCE_CLI);
9375     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_20_s_30);
9376     FIB_TEST((FIB_NODE_INDEX_INVALID == fei),
9377              "%U gone",
9378              format_fib_prefix, &pfx_10_10_10_20_s_30);
9379
9380     /*
9381      * inheriting source is modifed - expect the modification to be present
9382      *  throughout the sub-tree
9383      */
9384     adj_index_t ai_10_10_10_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
9385                                                     VNET_LINK_IP4,
9386                                                     &nh_10_10_10_2,
9387                                                     tm->hw[0]->sw_if_index);
9388     fib_test_lb_bucket_t adj_o_10_10_10_2 = {
9389         .type = FT_LB_ADJ,
9390         .adj = {
9391             .adj = ai_10_10_10_2,
9392         },
9393     };
9394
9395     fib_table_entry_update_one_path(0,
9396                                     &pfx_10_10_10_0_s_24,
9397                                     FIB_SOURCE_API,
9398                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9399                                     DPO_PROTO_IP4,
9400                                     &nh_10_10_10_2,
9401                                     tm->hw[0]->sw_if_index,
9402                                     ~0,
9403                                     1,
9404                                     NULL,
9405                                     FIB_ROUTE_PATH_FLAG_NONE);
9406     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9407     FIB_TEST(!fib_test_validate_entry(fei,
9408                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9409                                       1,
9410                                       &adj_o_10_10_10_2),
9411              "%U via 10.10.10.2",
9412              format_fib_prefix, &pfx_10_10_10_21_s_32);
9413     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9414     FIB_TEST(!fib_test_validate_entry(fei,
9415                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9416                                       1,
9417                                       &adj_o_10_10_10_2),
9418              "%U via 10.10.10.2",
9419              format_fib_prefix, &pfx_10_10_10_22_s_32);
9420     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9421     FIB_TEST(!fib_test_validate_entry(fei,
9422                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9423                                       1,
9424                                       &adj_o_10_10_10_2),
9425              "%U via 10.10.10.2",
9426              format_fib_prefix, &pfx_10_10_10_255_s_32);
9427     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9428     FIB_TEST(!fib_test_validate_entry(fei,
9429                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9430                                       1,
9431                                       &adj_o_10_10_10_2),
9432              "%U via 10.10.10.2",
9433              format_fib_prefix, &pfx_10_10_10_0_s_24);
9434
9435     fib_source_t hi_src = fib_source_allocate("test", 0x50,
9436                                               FIB_SOURCE_BH_SIMPLE);
9437
9438     /*
9439      * add the source that replaces inherited state.
9440      * inheriting source is not the best, so it doesn't push state.
9441      */
9442     fib_table_entry_update_one_path(0,
9443                                     &pfx_10_10_10_0_s_24,
9444                                     hi_src,
9445                                     FIB_ENTRY_FLAG_NONE,
9446                                     DPO_PROTO_IP4,
9447                                     &nh_10_10_10_1,
9448                                     tm->hw[0]->sw_if_index,
9449                                     ~0,
9450                                     1,
9451                                     NULL,
9452                                     FIB_ROUTE_PATH_FLAG_NONE);
9453     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9454     FIB_TEST(!fib_test_validate_entry(fei,
9455                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9456                                       1,
9457                                       &adj_o_10_10_10_1),
9458              "%U via 10.10.10.1",
9459              format_fib_prefix, &pfx_10_10_10_0_s_24);
9460
9461     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9462     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9463              "%U resolves via drop",
9464              format_fib_prefix, &pfx_10_10_10_21_s_32);
9465     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9466     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9467              "%U resolves via drop",
9468              format_fib_prefix, &pfx_10_10_10_22_s_32);
9469     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9470     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9471              "%U resolves via drop",
9472              format_fib_prefix, &pfx_10_10_10_255_s_32);
9473     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
9474     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
9475              "%U resolves via drop",
9476              format_fib_prefix, &pfx_10_10_10_16_s_28);
9477
9478     /*
9479      * withdraw the higher priority source and expect the inherited to return
9480      * throughout the sub-tree
9481      */
9482     fib_table_entry_delete(0, &pfx_10_10_10_0_s_24, hi_src);
9483
9484     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9485     FIB_TEST(!fib_test_validate_entry(fei,
9486                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9487                                       1,
9488                                       &adj_o_10_10_10_2),
9489              "%U via 10.10.10.2",
9490              format_fib_prefix, &pfx_10_10_10_21_s_32);
9491     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9492     FIB_TEST(!fib_test_validate_entry(fei,
9493                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9494                                       1,
9495                                       &adj_o_10_10_10_2),
9496              "%U via 10.10.10.2",
9497              format_fib_prefix, &pfx_10_10_10_22_s_32);
9498     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9499     FIB_TEST(!fib_test_validate_entry(fei,
9500                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9501                                       1,
9502                                       &adj_o_10_10_10_2),
9503              "%U via 10.10.10.2",
9504              format_fib_prefix, &pfx_10_10_10_255_s_32);
9505     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9506     FIB_TEST(!fib_test_validate_entry(fei,
9507                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9508                                       1,
9509                                       &adj_o_10_10_10_2),
9510              "%U via 10.10.10.2",
9511              format_fib_prefix, &pfx_10_10_10_0_s_24);
9512     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
9513     FIB_TEST(!fib_test_validate_entry(fei,
9514                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9515                                       1,
9516                                       &adj_o_10_10_10_2),
9517              "%U via 10.10.10.2",
9518              format_fib_prefix, &pfx_10_10_10_16_s_28);
9519
9520     /*
9521      * source a covered entry in the sub-tree with the same inherting source
9522      *  - expect that it now owns the sub-tree and thus over-rides its cover
9523      */
9524     fib_table_entry_update_one_path(0,
9525                                     &pfx_10_10_10_16_s_28,
9526                                     FIB_SOURCE_API,
9527                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9528                                     DPO_PROTO_IP4,
9529                                     &nh_10_10_10_1,
9530                                     tm->hw[0]->sw_if_index,
9531                                     ~0,
9532                                     1,
9533                                     NULL,
9534                                     FIB_ROUTE_PATH_FLAG_NONE);
9535     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
9536     FIB_TEST(!fib_test_validate_entry(fei,
9537                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9538                                       1,
9539                                       &adj_o_10_10_10_1),
9540              "%U via 10.10.10.1",
9541              format_fib_prefix, &pfx_10_10_10_16_s_28);
9542     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9543     FIB_TEST(!fib_test_validate_entry(fei,
9544                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9545                                       1,
9546                                       &adj_o_10_10_10_1),
9547              "%U via 10.10.10.2",
9548              format_fib_prefix, &pfx_10_10_10_22_s_32);
9549     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9550     FIB_TEST(!fib_test_validate_entry(fei,
9551                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9552                                       1,
9553                                       &adj_o_10_10_10_1),
9554              "%U via 10.10.10.2",
9555              format_fib_prefix, &pfx_10_10_10_21_s_32);
9556
9557     /* these two unaffected by the sub-tree change */
9558     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9559     FIB_TEST(!fib_test_validate_entry(fei,
9560                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9561                                       1,
9562                                       &adj_o_10_10_10_2),
9563              "%U via 10.10.10.2",
9564              format_fib_prefix, &pfx_10_10_10_255_s_32);
9565     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9566     FIB_TEST(!fib_test_validate_entry(fei,
9567                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9568                                       1,
9569                                       &adj_o_10_10_10_2),
9570              "%U via 10.10.10.2",
9571              format_fib_prefix, &pfx_10_10_10_0_s_24);
9572
9573     /*
9574      * removes the more specific, expect the /24 to now re-owns the sub-tree
9575      */
9576     fib_table_entry_delete(0, &pfx_10_10_10_16_s_28, FIB_SOURCE_API);
9577
9578     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9579     FIB_TEST(!fib_test_validate_entry(fei,
9580                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9581                                       1,
9582                                       &adj_o_10_10_10_2),
9583              "%U via 10.10.10.2",
9584              format_fib_prefix, &pfx_10_10_10_16_s_28);
9585     FIB_TEST(!fib_test_validate_entry(fei,
9586                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9587                                       1,
9588                                       &adj_o_10_10_10_2),
9589              "%U via 10.10.10.2",
9590              format_fib_prefix, &pfx_10_10_10_21_s_32);
9591     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9592     FIB_TEST(!fib_test_validate_entry(fei,
9593                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9594                                       1,
9595                                       &adj_o_10_10_10_2),
9596              "%U via 10.10.10.2",
9597              format_fib_prefix, &pfx_10_10_10_22_s_32);
9598     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9599     FIB_TEST(!fib_test_validate_entry(fei,
9600                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9601                                       1,
9602                                       &adj_o_10_10_10_2),
9603              "%U via 10.10.10.2",
9604              format_fib_prefix, &pfx_10_10_10_255_s_32);
9605     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9606     FIB_TEST(!fib_test_validate_entry(fei,
9607                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9608                                       1,
9609                                       &adj_o_10_10_10_2),
9610              "%U via 10.10.10.2",
9611              format_fib_prefix, &pfx_10_10_10_0_s_24);
9612     /*
9613      * modify the /24. expect the new forwarding to be pushed down
9614      */
9615     fib_table_entry_update_one_path(0,
9616                                     &pfx_10_10_10_0_s_24,
9617                                     FIB_SOURCE_API,
9618                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9619                                     DPO_PROTO_IP4,
9620                                     &nh_10_10_10_1,
9621                                     tm->hw[0]->sw_if_index,
9622                                     ~0,
9623                                     1,
9624                                     NULL,
9625                                     FIB_ROUTE_PATH_FLAG_NONE);
9626     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9627     FIB_TEST(!fib_test_validate_entry(fei,
9628                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9629                                       1,
9630                                       &adj_o_10_10_10_1),
9631              "%U via 10.10.10.1",
9632              format_fib_prefix, &pfx_10_10_10_16_s_28);
9633     FIB_TEST(!fib_test_validate_entry(fei,
9634                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9635                                       1,
9636                                       &adj_o_10_10_10_1),
9637              "%U via 10.10.10.1",
9638              format_fib_prefix, &pfx_10_10_10_21_s_32);
9639     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9640     FIB_TEST(!fib_test_validate_entry(fei,
9641                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9642                                       1,
9643                                       &adj_o_10_10_10_1),
9644              "%U via 10.10.10.1",
9645              format_fib_prefix, &pfx_10_10_10_22_s_32);
9646     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9647     FIB_TEST(!fib_test_validate_entry(fei,
9648                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9649                                       1,
9650                                       &adj_o_10_10_10_1),
9651              "%U via 10.10.10.1",
9652              format_fib_prefix, &pfx_10_10_10_255_s_32);
9653     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9654     FIB_TEST(!fib_test_validate_entry(fei,
9655                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9656                                       1,
9657                                       &adj_o_10_10_10_1),
9658              "%U via 10.10.10.1",
9659              format_fib_prefix, &pfx_10_10_10_0_s_24);
9660
9661     /*
9662      * add an entry less specific to /24. it should not own the /24's tree
9663      */
9664     const fib_prefix_t pfx_10_10_0_0_s_16 = {
9665         .fp_len = 16,
9666         .fp_proto = FIB_PROTOCOL_IP4,
9667         .fp_addr = nh_10_10_0_0,
9668     };
9669     fib_table_entry_update_one_path(0,
9670                                     &pfx_10_10_0_0_s_16,
9671                                     FIB_SOURCE_API,
9672                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
9673                                     DPO_PROTO_IP4,
9674                                     &nh_10_10_10_2,
9675                                     tm->hw[0]->sw_if_index,
9676                                     ~0,
9677                                     1,
9678                                     NULL,
9679                                     FIB_ROUTE_PATH_FLAG_NONE);
9680     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
9681     FIB_TEST(!fib_test_validate_entry(fei,
9682                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9683                                       1,
9684                                       &adj_o_10_10_10_1),
9685              "%U via 10.10.10.1",
9686              format_fib_prefix, &pfx_10_10_10_16_s_28);
9687     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
9688     FIB_TEST(!fib_test_validate_entry(fei,
9689                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9690                                       1,
9691                                       &adj_o_10_10_10_1),
9692              "%U via 10.10.10.1",
9693              format_fib_prefix, &pfx_10_10_10_22_s_32);
9694     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
9695     FIB_TEST(!fib_test_validate_entry(fei,
9696                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9697                                       1,
9698                                       &adj_o_10_10_10_1),
9699              "%U via 10.10.10.1",
9700              format_fib_prefix, &pfx_10_10_10_255_s_32);
9701     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
9702     FIB_TEST(!fib_test_validate_entry(fei,
9703                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9704                                       1,
9705                                       &adj_o_10_10_10_1),
9706              "%U via 10.10.10.1",
9707              format_fib_prefix, &pfx_10_10_10_0_s_24);
9708     fei = fib_table_lookup_exact_match(0, &pfx_10_10_0_0_s_16);
9709     FIB_TEST(!fib_test_validate_entry(fei,
9710                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9711                                       1,
9712                                       &adj_o_10_10_10_2),
9713              "%U via 10.10.10.2",
9714              format_fib_prefix, &pfx_10_10_0_0_s_16);
9715
9716     /*
9717      * Add/remove an interposer source to a new /32
9718      */
9719     const fib_prefix_t pfx_11_11_11_11_s_32 = {
9720         .fp_len = 32,
9721         .fp_proto = FIB_PROTOCOL_IP4,
9722         .fp_addr = nh_11_11_11_11,
9723     };
9724
9725     fib_table_entry_update_one_path(0,
9726                                     &pfx_11_11_11_11_s_32,
9727                                     FIB_SOURCE_API,
9728                                     FIB_ENTRY_FLAG_NONE,
9729                                     DPO_PROTO_IP4,
9730                                     &nh_10_10_10_3,
9731                                     tm->hw[0]->sw_if_index,
9732                                     ~0,
9733                                     1,
9734                                     NULL,
9735                                     FIB_ROUTE_PATH_FLAG_NONE);
9736
9737     dpo_id_t interposer = DPO_INVALID;
9738     fib_mpls_label_t *l99 = NULL, fml_99 = {
9739         .fml_value = 99,
9740     };
9741     vec_add1(l99, fml_99);
9742
9743     mpls_label_dpo_create(l99,
9744                           MPLS_EOS,
9745                           DPO_PROTO_IP4,
9746                           MPLS_LABEL_DPO_FLAG_NONE,
9747                           punt_dpo_get(DPO_PROTO_MPLS),
9748                           &interposer);
9749
9750     adj_index_t ai_10_10_10_3 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
9751                                                     VNET_LINK_IP4,
9752                                                     &nh_10_10_10_3,
9753                                                     tm->hw[0]->sw_if_index);
9754     fib_test_lb_bucket_t adj_o_10_10_10_3 = {
9755         .type = FT_LB_ADJ,
9756         .adj = {
9757             .adj = ai_10_10_10_3,
9758         },
9759     };
9760     fib_test_lb_bucket_t l99_o_10_10_10_3 = {
9761         .type = FT_LB_LABEL_O_ADJ,
9762         .label_o_adj = {
9763             .adj = ai_10_10_10_3,
9764             .label = 99,
9765             .eos = MPLS_EOS,
9766         },
9767     };
9768
9769     fei = fib_table_entry_special_dpo_add(0,
9770                                           &pfx_11_11_11_11_s_32,
9771                                           FIB_SOURCE_SPECIAL,
9772                                           FIB_ENTRY_FLAG_INTERPOSE,
9773                                           &interposer);
9774     FIB_TEST(!fib_test_validate_entry(fei,
9775                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9776                                       1,
9777                                       &l99_o_10_10_10_3),
9778              "%U via interposer adj",
9779              format_fib_prefix,&pfx_11_11_11_11_s_32);
9780
9781     fib_table_entry_special_remove(0,
9782                                    &pfx_11_11_11_11_s_32,
9783                                    FIB_SOURCE_SPECIAL);
9784     FIB_TEST(!fib_test_validate_entry(fei,
9785                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9786                                       1,
9787                                       &adj_o_10_10_10_3),
9788              "%U via 10.10.10.1",
9789              format_fib_prefix, &pfx_11_11_11_11_s_32);
9790     dpo_reset(&interposer);
9791     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API);
9792
9793     /*
9794      * add an interposer to a source with path-extensions
9795      */
9796     fib_mpls_label_t *l3300 = NULL, fml_3300 = {
9797         .fml_value = 3300,
9798     };
9799     vec_add1(l3300, fml_3300);
9800     fib_table_entry_update_one_path(0,
9801                                     &pfx_11_11_11_11_s_32,
9802                                     FIB_SOURCE_API,
9803                                     FIB_ENTRY_FLAG_NONE,
9804                                     DPO_PROTO_IP4,
9805                                     &nh_10_10_10_3,
9806                                     tm->hw[0]->sw_if_index,
9807                                     ~0,
9808                                     1,
9809                                     l3300,
9810                                     FIB_ROUTE_PATH_FLAG_NONE);
9811
9812     mpls_label_dpo_create(l99,
9813                           MPLS_EOS,
9814                           DPO_PROTO_IP4,
9815                           MPLS_LABEL_DPO_FLAG_NONE,
9816                           punt_dpo_get(DPO_PROTO_MPLS),
9817                           &interposer);
9818
9819     adj_index_t ai_mpls_10_10_10_3 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
9820                                                          VNET_LINK_MPLS,
9821                                                          &nh_10_10_10_3,
9822                                                          tm->hw[0]->sw_if_index);
9823     fib_test_lb_bucket_t l3300_o_10_10_10_3 = {
9824         .type = FT_LB_LABEL_O_ADJ,
9825         .label_o_adj = {
9826             .adj = ai_mpls_10_10_10_3,
9827             .label = 3300,
9828             .eos = MPLS_EOS,
9829         },
9830     };
9831     fib_test_lb_bucket_t lchain_o_10_10_10_3 = {
9832         .type = FT_LB_LABEL_CHAIN_O_ADJ,
9833         .label_chain_o_adj = {
9834             .adj = ai_mpls_10_10_10_3,
9835             .label_chain_size = 2,
9836             .label_chain = {
9837                 99, 3300
9838             },
9839             .eos = MPLS_EOS,
9840         },
9841     };
9842
9843     fei = fib_table_entry_special_dpo_add(0,
9844                                           &pfx_11_11_11_11_s_32,
9845                                           FIB_SOURCE_SPECIAL,
9846                                           FIB_ENTRY_FLAG_INTERPOSE,
9847                                           &interposer);
9848
9849     FIB_TEST(!fib_test_validate_entry(fei,
9850                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9851                                       1,
9852                                       &lchain_o_10_10_10_3),
9853              "%U via interposer & mpls on adj",
9854              format_fib_prefix, &pfx_11_11_11_11_s_32);
9855
9856     fib_table_entry_special_remove(0,
9857                                    &pfx_11_11_11_11_s_32,
9858                                    FIB_SOURCE_SPECIAL);
9859     FIB_TEST(!fib_test_validate_entry(fei,
9860                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9861                                       1,
9862                                       &l3300_o_10_10_10_3),
9863              "%U via 10.10.10.1",
9864              format_fib_prefix, &pfx_11_11_11_11_s_32);
9865     adj_unlock(ai_mpls_10_10_10_3);
9866
9867     /*
9868      * remove and re-add the second best API source while the interpose
9869      * is present
9870      */
9871     fei = fib_table_entry_special_dpo_add(0,
9872                                           &pfx_11_11_11_11_s_32,
9873                                           FIB_SOURCE_SPECIAL,
9874                                           FIB_ENTRY_FLAG_INTERPOSE,
9875                                           &interposer);
9876     FIB_TEST(!fib_test_validate_entry(fei,
9877                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9878                                       1,
9879                                       &lchain_o_10_10_10_3),
9880              "%U via interposer adj",
9881              format_fib_prefix,&pfx_11_11_11_11_s_32);
9882
9883     FIB_TEST(3 == pool_elts(mpls_label_dpo_pool),
9884              "MPLS label pool: %d",
9885              pool_elts(mpls_label_dpo_pool));
9886
9887     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API);
9888
9889     /*
9890      * the interpose does not get stacked when there are not valid paths
9891      */
9892     fib_test_lb_bucket_t bucket_drop = {
9893         .type = FT_LB_DROP,
9894         .special = {
9895             .adj = DPO_PROTO_IP4,
9896         },
9897     };
9898     FIB_TEST(!fib_test_validate_entry(fei,
9899                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9900                                       1,
9901                                       &bucket_drop),
9902              "%U via drop",
9903              format_fib_prefix,&pfx_11_11_11_11_s_32);
9904
9905     fib_table_entry_update_one_path(0,
9906                                     &pfx_11_11_11_11_s_32,
9907                                     FIB_SOURCE_API,
9908                                     FIB_ENTRY_FLAG_NONE,
9909                                     DPO_PROTO_IP4,
9910                                     &nh_10_10_10_3,
9911                                     tm->hw[0]->sw_if_index,
9912                                     ~0,
9913                                     1,
9914                                     NULL,
9915                                     FIB_ROUTE_PATH_FLAG_NONE);
9916     FIB_TEST(!fib_test_validate_entry(fei,
9917                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9918                                       1,
9919                                       &l99_o_10_10_10_3),
9920              "%U via interposer adj",
9921              format_fib_prefix,&pfx_11_11_11_11_s_32);
9922     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API);
9923
9924     /*
9925      * add a cover for the interposed entry, so that we test it selects
9926      * the covers forwarding.
9927      */
9928     const fib_prefix_t pfx_11_11_11_0_s_24 = {
9929         .fp_len = 24,
9930         .fp_proto = FIB_PROTOCOL_IP4,
9931         .fp_addr = nh_11_11_11_0,
9932     };
9933     fib_table_entry_update_one_path(0,
9934                                     &pfx_11_11_11_0_s_24,
9935                                     FIB_SOURCE_API,
9936                                     FIB_ENTRY_FLAG_NONE,
9937                                     DPO_PROTO_IP4,
9938                                     &nh_10_10_10_3,
9939                                     tm->hw[0]->sw_if_index,
9940                                     ~0,
9941                                     1,
9942                                     NULL,
9943                                     FIB_ROUTE_PATH_FLAG_NONE);
9944     FIB_TEST(!fib_test_validate_entry(fei,
9945                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
9946                                       1,
9947                                       &l99_o_10_10_10_3),
9948              "%U via interposer adj",
9949              format_fib_prefix,&pfx_11_11_11_11_s_32);
9950
9951     /*
9952      * multiple interpose sources on the same entry. Only the high
9953      * priority source gets to add the interpose.
9954      */
9955     fib_table_entry_update_one_path(0,
9956                                     &pfx_11_11_11_11_s_32,
9957                                     FIB_SOURCE_API,
9958                                     FIB_ENTRY_FLAG_NONE,
9959                                     DPO_PROTO_IP4,
9960                                     &nh_10_10_10_3,
9961                                     tm->hw[0]->sw_if_index,
9962                                     ~0,
9963                                     1,
9964                                     NULL,
9965                                     FIB_ROUTE_PATH_FLAG_NONE);
9966
9967     dpo_id_t interposer2 = DPO_INVALID;
9968     fib_mpls_label_t *l100 = NULL, fml_100 = {
9969         .fml_value = 100,
9970     };
9971     vec_add1(l100, fml_100);
9972
9973     mpls_label_dpo_create(l100,
9974                           MPLS_EOS,
9975                           DPO_PROTO_IP4,
9976                           MPLS_LABEL_DPO_FLAG_NONE,
9977                           punt_dpo_get(DPO_PROTO_MPLS),
9978                           &interposer2);
9979
9980     fei = fib_table_entry_special_dpo_add(0,
9981                                           &pfx_11_11_11_11_s_32,
9982                                           FIB_SOURCE_CLASSIFY,
9983                                           FIB_ENTRY_FLAG_INTERPOSE,
9984                                           &interposer2);
9985
9986     fib_test_lb_bucket_t lc100_o_10_10_10_3 = {
9987         .type = FT_LB_LABEL_CHAIN_O_ADJ,
9988         .label_chain_o_adj = {
9989             .adj = ai_10_10_10_3,
9990             .label_chain_size = 2,
9991             .label_chain = {
9992                 99, 100
9993             },
9994             .eos = MPLS_EOS,
9995         },
9996     };
9997
9998     FIB_TEST(!fib_test_validate_entry(fei,
9999                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10000                                       1,
10001                                       &lc100_o_10_10_10_3),
10002              "%U via interposer label 99",
10003              format_fib_prefix,&pfx_11_11_11_11_s_32);
10004
10005     fib_test_lb_bucket_t l100_o_10_10_10_3 = {
10006         .type = FT_LB_LABEL_O_ADJ,
10007         .label_o_adj = {
10008             .adj = ai_10_10_10_3,
10009             .label = 100,
10010             .eos = MPLS_EOS,
10011         },
10012     };
10013
10014     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_SPECIAL);
10015
10016     FIB_TEST(!fib_test_validate_entry(fei,
10017                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10018                                       1,
10019                                       &l100_o_10_10_10_3),
10020              "%U via interposer label 99",
10021              format_fib_prefix,&pfx_11_11_11_11_s_32);
10022
10023     fib_table_entry_delete(0, &pfx_11_11_11_0_s_24, FIB_SOURCE_API);
10024     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API);
10025     FIB_TEST(!fib_test_validate_entry(fei,
10026                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10027                                       1,
10028                                       &bucket_drop),
10029              "%U via drop",
10030              format_fib_prefix,&pfx_11_11_11_11_s_32);
10031     fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_CLASSIFY);
10032
10033     /*
10034      * update a source to/from interpose.
10035      */
10036     /* fib_table_entry_update_one_path(0, */
10037     /*                                 &pfx_11_11_11_0_s_24, */
10038     /*                              FIB_SOURCE_API, */
10039     /*                              FIB_ENTRY_FLAG_NONE, */
10040     /*                              DPO_PROTO_IP4, */
10041     /*                                 &nh_10_10_10_3, */
10042     /*                              tm->hw[0]->sw_if_index, */
10043     /*                              ~0, */
10044     /*                              1, */
10045     /*                              NULL, */
10046     /*                              FIB_ROUTE_PATH_FLAG_NONE); */
10047     /* fei = fib_table_entry_special_dpo_add(0, */
10048     /*                                       &pfx_11_11_11_11_s_32, */
10049     /*                                       FIB_SOURCE_API, */
10050     /*                                       FIB_ENTRY_FLAG_INTERPOSE, */
10051     /*                                       &interposer); */
10052     /* FIB_TEST(!fib_test_validate_entry(fei, */
10053     /*                                   FIB_FORW_CHAIN_TYPE_UNICAST_IP4, */
10054     /*                                   1, */
10055     /*                                   &l99_o_10_10_10_3), */
10056     /*          "%U via interposer label 99", */
10057     /*          format_fib_prefix,&pfx_11_11_11_11_s_32); */
10058
10059     /* FIB_TEST(3 == pool_elts(mpls_label_dpo_pool), */
10060     /*          "MPLS label pool: %d", */
10061     /*          pool_elts(mpls_label_dpo_pool)); */
10062     /* FIB_TEST((2 == mpls_label_dpo_get(interposer.dpoi_index)->mld_locks), */
10063     /*          "Interposer %d locks", */
10064     /*          mpls_label_dpo_get(interposer.dpoi_index)->mld_locks); */
10065
10066     /* fib_table_entry_update_one_path(0, */
10067     /*                                 &pfx_11_11_11_11_s_32, */
10068     /*                              FIB_SOURCE_API, */
10069     /*                              FIB_ENTRY_FLAG_NONE, */
10070     /*                              DPO_PROTO_IP4, */
10071     /*                                 &nh_10_10_10_2, */
10072     /*                              tm->hw[0]->sw_if_index, */
10073     /*                              ~0, */
10074     /*                              1, */
10075     /*                              NULL, */
10076     /*                              FIB_ROUTE_PATH_FLAG_NONE); */
10077     /* FIB_TEST(!fib_test_validate_entry(fei, */
10078     /*                                   FIB_FORW_CHAIN_TYPE_UNICAST_IP4, */
10079     /*                                   1, */
10080     /*                                   &adj_o_10_10_10_2), */
10081     /*          "%U via 10.10.10.2", */
10082     /*          format_fib_prefix,&pfx_11_11_11_11_s_32); */
10083
10084     /* FIB_TEST((1 == mpls_label_dpo_get(interposer.dpoi_index)->mld_locks), */
10085     /*          "Interposer %d locks", */
10086     /*          mpls_label_dpo_get(interposer.dpoi_index)->mld_locks); */
10087     /* FIB_TEST(2 == pool_elts(mpls_label_dpo_pool), */
10088     /*          "MPLS label pool: %d", */
10089     /*          pool_elts(mpls_label_dpo_pool)); */
10090
10091     /* fei = fib_table_entry_special_dpo_add(0, */
10092     /*                                       &pfx_11_11_11_11_s_32, */
10093     /*                                       FIB_SOURCE_API, */
10094     /*                                       FIB_ENTRY_FLAG_INTERPOSE, */
10095     /*                                       &interposer); */
10096     /* FIB_TEST(!fib_test_validate_entry(fei, */
10097     /*                                   FIB_FORW_CHAIN_TYPE_UNICAST_IP4, */
10098     /*                                   1, */
10099     /*                                   &l99_o_10_10_10_3), */
10100     /*          "%U via interposer label 99", */
10101     /*          format_fib_prefix,&pfx_11_11_11_11_s_32); */
10102
10103     /* fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API); */
10104
10105     /*
10106      * Add/remove an interposer source from the top of the subtrie. The
10107      * interposer source is not inherited.
10108      */
10109     fib_table_entry_update_one_path(0,
10110                                     &pfx_10_10_10_0_s_24,
10111                                     FIB_SOURCE_API,
10112                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
10113                                     DPO_PROTO_IP4,
10114                                     &nh_10_10_10_3,
10115                                     tm->hw[0]->sw_if_index,
10116                                     ~0,
10117                                     1,
10118                                     NULL,
10119                                     FIB_ROUTE_PATH_FLAG_NONE);
10120     fei = fib_table_entry_special_dpo_add(0,
10121                                           &pfx_10_10_10_0_s_24,
10122                                           FIB_SOURCE_SPECIAL,
10123                                           FIB_ENTRY_FLAG_INTERPOSE,
10124                                           &interposer);
10125     FIB_TEST(!fib_test_validate_entry(fei,
10126                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10127                                       1,
10128                                       &l99_o_10_10_10_3),
10129              "%U via interposer label",
10130              format_fib_prefix,&pfx_10_10_10_0_s_24);
10131     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
10132     FIB_TEST(!fib_test_validate_entry(fei,
10133                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10134                                       1,
10135                                       &bucket_drop),
10136              "%U via drop",
10137              format_fib_prefix, &pfx_10_10_10_21_s_32);
10138
10139     fib_table_entry_special_remove(0,
10140                                    &pfx_10_10_10_0_s_24,
10141                                    FIB_SOURCE_SPECIAL);
10142     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
10143     FIB_TEST(!fib_test_validate_entry(fei,
10144                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10145                                       1,
10146                                       &adj_o_10_10_10_3),
10147              "%U via 10.10.10.1",
10148              format_fib_prefix, &pfx_10_10_10_0_s_24);
10149     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
10150     FIB_TEST(!fib_test_validate_entry(fei,
10151                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10152                                       1,
10153                                       &adj_o_10_10_10_3),
10154              "%U via via 10.10.10.1",
10155              format_fib_prefix, &pfx_10_10_10_21_s_32);
10156
10157     /*
10158      * Add/remove an interposer source from the top of the subtrie. The
10159      * interposer source is inherited.
10160      */
10161     fei = fib_table_entry_special_dpo_add(0,
10162                                           &pfx_10_10_10_0_s_24,
10163                                           FIB_SOURCE_SPECIAL,
10164                                           (FIB_ENTRY_FLAG_COVERED_INHERIT |
10165                                            FIB_ENTRY_FLAG_INTERPOSE),
10166                                           &interposer);
10167     FIB_TEST(!fib_test_validate_entry(fei,
10168                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10169                                       1,
10170                                       &l99_o_10_10_10_3),
10171              "%U via interposer label",
10172              format_fib_prefix,&pfx_10_10_10_0_s_24);
10173
10174     /* interposer gets forwarding from the drop cli source */
10175     fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
10176     FIB_TEST(!fib_test_validate_entry(fei,
10177                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10178                                       1,
10179                                       &bucket_drop),
10180              "%U via drop",
10181              format_fib_prefix,&pfx_10_10_10_21_s_32);
10182
10183     fib_table_entry_update_one_path(0,
10184                                     &pfx_10_10_10_21_s_32,
10185                                     FIB_SOURCE_API,
10186                                     FIB_ENTRY_FLAG_NONE,
10187                                     DPO_PROTO_IP4,
10188                                     &nh_10_10_10_3,
10189                                     tm->hw[0]->sw_if_index,
10190                                     ~0,
10191                                     1,
10192                                     NULL,
10193                                     FIB_ROUTE_PATH_FLAG_NONE);
10194     fib_table_entry_delete(0, &pfx_10_10_10_21_s_32, FIB_SOURCE_CLI);
10195     /* interposer gets forwarding from the API source */
10196     FIB_TEST(!fib_test_validate_entry(fei,
10197                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10198                                       1,
10199                                       &l99_o_10_10_10_3),
10200              "%U via interposer label",
10201              format_fib_prefix,&pfx_10_10_10_21_s_32);
10202
10203     /*
10204      * cleanup
10205      */
10206     fib_table_entry_delete(0, &pfx_10_10_10_22_s_32, FIB_SOURCE_CLI);
10207     fib_table_entry_delete(0, &pfx_10_10_10_21_s_32, FIB_SOURCE_API);
10208     fib_table_entry_delete(0, &pfx_10_10_10_16_s_28, FIB_SOURCE_CLI);
10209     fib_table_entry_delete(0, &pfx_10_10_10_255_s_32, FIB_SOURCE_CLI);
10210     fib_table_entry_delete(0, &pfx_10_10_10_0_s_24, FIB_SOURCE_API);
10211     fib_table_entry_delete(0, &pfx_10_10_0_0_s_16, FIB_SOURCE_API);
10212     fib_table_entry_delete(0, &pfx_10_10_10_0_s_24, FIB_SOURCE_SPECIAL);
10213     adj_unlock(ai_10_10_10_1);
10214     adj_unlock(ai_10_10_10_2);
10215     adj_unlock(ai_10_10_10_3);
10216     dpo_reset(&interposer);
10217     dpo_reset(&interposer2);
10218     FIB_TEST(0 == pool_elts(mpls_label_dpo_pool),
10219              "MPLS label pool empty: %d",
10220              pool_elts(mpls_label_dpo_pool));
10221     FIB_TEST(0 == adj_nbr_db_size(), "All adjacencies removed");
10222     FIB_TEST(N_PLS == fib_path_list_pool_size(),
10223              "number of path-lists: %d = %d",
10224              N_PLS, fib_path_list_pool_size());
10225
10226     /*
10227      * test the v6 tree walk.
10228      * a /64 that covers everything. a /96 that covers one /128
10229      * a second /128 covered only by the /64.
10230      */
10231     const fib_prefix_t pfx_2001_s_64 = {
10232         .fp_len = 64,
10233         .fp_proto = FIB_PROTOCOL_IP6,
10234         .fp_addr = {
10235             .ip6 = {
10236                 .as_u64 = {
10237                     [0] = clib_host_to_net_u64(0x2001000000000000),
10238                     [1] = clib_host_to_net_u64(0x0000000000000000),
10239                 },
10240             },
10241         },
10242     };
10243     const fib_prefix_t pfx_2001_1_s_96 = {
10244         .fp_len = 96,
10245         .fp_proto = FIB_PROTOCOL_IP6,
10246         .fp_addr = {
10247             .ip6 = {
10248                 .as_u64 = {
10249                     [0] = clib_host_to_net_u64(0x2001000000000000),
10250                     [1] = clib_host_to_net_u64(0x1000000000000000),
10251                 },
10252             },
10253         },
10254     };
10255     const fib_prefix_t pfx_2001_1_1_s_128 = {
10256         .fp_len = 128,
10257         .fp_proto = FIB_PROTOCOL_IP6,
10258         .fp_addr = {
10259             .ip6 = {
10260                 .as_u64 = {
10261                     [0] = clib_host_to_net_u64(0x2001000000000000),
10262                     [1] = clib_host_to_net_u64(0x1000000000000001),
10263                 },
10264             },
10265         },
10266     };
10267     const fib_prefix_t pfx_2001_0_1_s_128 = {
10268         .fp_len = 128,
10269         .fp_proto = FIB_PROTOCOL_IP6,
10270         .fp_addr = {
10271             .ip6 = {
10272                 .as_u64 = {
10273                     [0] = clib_host_to_net_u64(0x2001000000000000),
10274                     [1] = clib_host_to_net_u64(0x0000000000000001),
10275                 },
10276             },
10277         },
10278     };
10279     const ip46_address_t nh_3000_1 = {
10280         .ip6 = {
10281             .as_u64 = {
10282                 [0] = clib_host_to_net_u64(0x3000000000000000),
10283                 [1] = clib_host_to_net_u64(0x0000000000000001),
10284             },
10285         },
10286     };
10287     const ip46_address_t nh_3000_2 = {
10288         .ip6 = {
10289             .as_u64 = {
10290                 [0] = clib_host_to_net_u64(0x3000000000000000),
10291                 [1] = clib_host_to_net_u64(0x0000000000000002),
10292             },
10293         },
10294     };
10295     adj_index_t ai_3000_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
10296                                                 VNET_LINK_IP6,
10297                                                 &nh_3000_1,
10298                                                 tm->hw[0]->sw_if_index);
10299     adj_index_t ai_3000_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
10300                                                 VNET_LINK_IP6,
10301                                                 &nh_3000_2,
10302                                                 tm->hw[0]->sw_if_index);
10303     fib_test_lb_bucket_t adj_o_3000_1 = {
10304         .type = FT_LB_ADJ,
10305         .adj = {
10306             .adj = ai_3000_1,
10307         },
10308     };
10309     fib_test_lb_bucket_t adj_o_3000_2 = {
10310         .type = FT_LB_ADJ,
10311         .adj = {
10312             .adj = ai_3000_2,
10313         },
10314     };
10315
10316     fib_table_entry_special_add(0,
10317                                 &pfx_2001_0_1_s_128,
10318                                 FIB_SOURCE_CLI,
10319                                 FIB_ENTRY_FLAG_DROP);
10320     fib_table_entry_special_add(0,
10321                                 &pfx_2001_1_1_s_128,
10322                                 FIB_SOURCE_CLI,
10323                                 FIB_ENTRY_FLAG_DROP);
10324
10325     /*
10326      * /96 has inherited forwarding pushed down to its covered /128
10327      */
10328     fib_table_entry_update_one_path(0,
10329                                     &pfx_2001_1_s_96,
10330                                     FIB_SOURCE_API,
10331                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
10332                                     DPO_PROTO_IP6,
10333                                     &nh_3000_1,
10334                                     tm->hw[0]->sw_if_index,
10335                                     ~0,
10336                                     1,
10337                                     NULL,
10338                                     FIB_ROUTE_PATH_FLAG_NONE);
10339     fei = fib_table_lookup_exact_match(0, &pfx_2001_1_s_96);
10340     FIB_TEST(!fib_test_validate_entry(fei,
10341                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10342                                       1,
10343                                       &adj_o_3000_1),
10344              "%U via 3000::1",
10345              format_fib_prefix, &pfx_2001_1_s_96);
10346     fei = fib_table_lookup_exact_match(0, &pfx_2001_1_1_s_128);
10347     FIB_TEST(!fib_test_validate_entry(fei,
10348                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10349                                       1,
10350                                       &adj_o_3000_1),
10351              "%U via 3000::1",
10352              format_fib_prefix, &pfx_2001_1_1_s_128);
10353     fei = fib_table_lookup_exact_match(0, &pfx_2001_0_1_s_128);
10354     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
10355              "%U resolves via drop",
10356              format_fib_prefix, &pfx_2001_0_1_s_128);
10357
10358     /*
10359      * /64 has inherited forwarding pushed down to all, but the /96
10360      * and its sub-tree remain unaffected.
10361      */
10362     fib_table_entry_update_one_path(0,
10363                                     &pfx_2001_s_64,
10364                                     FIB_SOURCE_API,
10365                                     FIB_ENTRY_FLAG_COVERED_INHERIT,
10366                                     DPO_PROTO_IP6,
10367                                     &nh_3000_2,
10368                                     tm->hw[0]->sw_if_index,
10369                                     ~0,
10370                                     1,
10371                                     NULL,
10372                                     FIB_ROUTE_PATH_FLAG_NONE);
10373
10374     fei = fib_table_lookup_exact_match(0, &pfx_2001_s_64);
10375     FIB_TEST(!fib_test_validate_entry(fei,
10376                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10377                                       1,
10378                                       &adj_o_3000_2),
10379              "%U via 3000::2",
10380              format_fib_prefix, &pfx_2001_s_64);
10381     fei = fib_table_lookup_exact_match(0, &pfx_2001_0_1_s_128);
10382     FIB_TEST(!fib_test_validate_entry(fei,
10383                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10384                                       1,
10385                                       &adj_o_3000_2),
10386              "%U via 3000::1",
10387              format_fib_prefix, &pfx_2001_0_1_s_128);
10388
10389     fei = fib_table_lookup_exact_match(0, &pfx_2001_1_s_96);
10390     FIB_TEST(!fib_test_validate_entry(fei,
10391                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10392                                       1,
10393                                       &adj_o_3000_1),
10394              "%U via 3000::1",
10395              format_fib_prefix, &pfx_2001_1_s_96);
10396     fei = fib_table_lookup_exact_match(0, &pfx_2001_1_1_s_128);
10397     FIB_TEST(!fib_test_validate_entry(fei,
10398                                       FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
10399                                       1,
10400                                       &adj_o_3000_1),
10401              "%U via 3000::1",
10402              format_fib_prefix, &pfx_2001_1_1_s_128);
10403
10404     /*
10405      * Cleanup
10406      */
10407     fib_table_entry_delete(0, &pfx_2001_0_1_s_128, FIB_SOURCE_CLI);
10408     fib_table_entry_delete(0, &pfx_2001_1_1_s_128, FIB_SOURCE_CLI);
10409     fib_table_entry_delete(0, &pfx_2001_s_64,      FIB_SOURCE_API);
10410     fib_table_entry_delete(0, &pfx_2001_1_s_96,    FIB_SOURCE_API);
10411     adj_unlock(ai_3000_1);
10412     adj_unlock(ai_3000_2);
10413
10414     /*
10415      * test no-one left behind
10416      */
10417     FIB_TEST((n_feis == fib_entry_pool_size()), "Entries gone");
10418     FIB_TEST(0 == adj_nbr_db_size(), "All adjacencies removed");
10419
10420     return (res);
10421 }
10422
10423 static int
10424 fib_test_sticky (void)
10425 {
10426     fib_route_path_t *r_paths = NULL;
10427     test_main_t *tm = &test_main;
10428     u32 ii, lb_count, pl_count;
10429     dpo_id_t dpo = DPO_INVALID;
10430     fib_node_index_t pl_index;
10431     int res = 0;
10432 #define N_PATHS 16
10433
10434     fib_test_lb_bucket_t buckets[N_PATHS];
10435     bfd_session_t bfds[N_PATHS] = {{0}};
10436
10437     lb_count = pool_elts(load_balance_pool);
10438     pl_count = fib_path_list_pool_size();
10439
10440     for (ii = 0; ii < N_PATHS; ii++)
10441     {
10442         ip46_address_t nh = {
10443             .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02 + ii),
10444         };
10445         adj_index_t ai;
10446
10447         ai = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
10448                                  VNET_LINK_IP4,
10449                                  &nh, tm->hw[0]->sw_if_index);
10450
10451         buckets[ii].type = FT_LB_ADJ;
10452         buckets[ii].adj.adj = ai;
10453
10454         bfds[ii].udp.key.peer_addr = nh;
10455         bfds[ii].udp.key.sw_if_index = tm->hw[0]->sw_if_index;
10456         bfds[ii].hop_type = BFD_HOP_TYPE_SINGLE;
10457         bfds[ii].local_state = BFD_STATE_init;
10458         adj_bfd_notify(BFD_LISTEN_EVENT_CREATE, &bfds[ii]);
10459         bfds[ii].local_state = BFD_STATE_up;
10460         adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[ii]);
10461     }
10462
10463     for (ii = 0; ii < N_PATHS; ii++)
10464     {
10465         fib_route_path_t r_path = {
10466             .frp_proto = DPO_PROTO_IP4,
10467             .frp_addr = {
10468                 .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02 + ii),
10469             },
10470             .frp_sw_if_index = tm->hw[0]->sw_if_index,
10471             .frp_weight = 1,
10472             .frp_fib_index = ~0,
10473         };
10474         vec_add1(r_paths, r_path);
10475     };
10476
10477     pl_index = fib_path_list_create(FIB_PATH_LIST_FLAG_SHARED, r_paths);
10478     fib_path_list_lock(pl_index);
10479
10480     fib_path_list_contribute_forwarding(pl_index,
10481                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10482                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10483                                         &dpo);
10484
10485     FIB_TEST(!fib_test_validate_lb(&dpo,
10486                                    16,
10487                                    &buckets[0],
10488                                    &buckets[1],
10489                                    &buckets[2],
10490                                    &buckets[3],
10491                                    &buckets[4],
10492                                    &buckets[5],
10493                                    &buckets[6],
10494                                    &buckets[7],
10495                                    &buckets[8],
10496                                    &buckets[9],
10497                                    &buckets[10],
10498                                    &buckets[11],
10499                                    &buckets[12],
10500                                    &buckets[13],
10501                                    &buckets[14],
10502                                    &buckets[15]),
10503              "Setup OK");
10504
10505     /* take down paths */
10506     bfds[0].local_state = BFD_STATE_down;
10507     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[0]);
10508
10509     fib_path_list_contribute_forwarding(pl_index,
10510                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10511                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10512                                         &dpo);
10513
10514     FIB_TEST(!fib_test_validate_lb(&dpo,
10515                                    16,
10516                                    &buckets[1],
10517                                    &buckets[1],
10518                                    &buckets[2],
10519                                    &buckets[3],
10520                                    &buckets[4],
10521                                    &buckets[5],
10522                                    &buckets[6],
10523                                    &buckets[7],
10524                                    &buckets[8],
10525                                    &buckets[9],
10526                                    &buckets[10],
10527                                    &buckets[11],
10528                                    &buckets[12],
10529                                    &buckets[13],
10530                                    &buckets[14],
10531                                    &buckets[15]),
10532              "Failed at shut-down path 0");
10533
10534     bfds[7].local_state = BFD_STATE_down;
10535     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[7]);
10536
10537     fib_path_list_contribute_forwarding(pl_index,
10538                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10539                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10540                                         &dpo);
10541
10542     FIB_TEST(!fib_test_validate_lb(&dpo,
10543                                    16,
10544                                    &buckets[1],
10545                                    &buckets[1],
10546                                    &buckets[2],
10547                                    &buckets[3],
10548                                    &buckets[4],
10549                                    &buckets[5],
10550                                    &buckets[6],
10551                                    &buckets[2],
10552                                    &buckets[8],
10553                                    &buckets[9],
10554                                    &buckets[10],
10555                                    &buckets[11],
10556                                    &buckets[12],
10557                                    &buckets[13],
10558                                    &buckets[14],
10559                                    &buckets[15]),
10560              "Failed at shut-down path 7");
10561
10562     /* paths back up */
10563     bfds[0].local_state = BFD_STATE_up;
10564     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[0]);
10565     bfds[7].local_state = BFD_STATE_up;
10566     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[7]);
10567
10568     fib_path_list_contribute_forwarding(pl_index,
10569                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10570                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10571                                         &dpo);
10572
10573     FIB_TEST(!fib_test_validate_lb(&dpo,
10574                                    16,
10575                                    &buckets[0],
10576                                    &buckets[1],
10577                                    &buckets[2],
10578                                    &buckets[3],
10579                                    &buckets[4],
10580                                    &buckets[5],
10581                                    &buckets[6],
10582                                    &buckets[7],
10583                                    &buckets[8],
10584                                    &buckets[9],
10585                                    &buckets[10],
10586                                    &buckets[11],
10587                                    &buckets[12],
10588                                    &buckets[13],
10589                                    &buckets[14],
10590                                    &buckets[15]),
10591              "recovery OK");
10592
10593     fib_path_list_unlock(pl_index);
10594
10595     /*
10596      * non-power of 2 number of buckets
10597      */
10598     fib_route_path_t *r_paths2 = NULL;
10599
10600     r_paths2 = vec_dup(r_paths);
10601     _vec_len(r_paths2) = 3;
10602
10603     pl_index = fib_path_list_create(FIB_PATH_LIST_FLAG_SHARED, r_paths2);
10604     fib_path_list_lock(pl_index);
10605
10606     fib_path_list_contribute_forwarding(pl_index,
10607                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10608                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10609                                         &dpo);
10610
10611     FIB_TEST(!fib_test_validate_lb(&dpo,
10612                                    16,
10613                                    &buckets[0],
10614                                    &buckets[0],
10615                                    &buckets[0],
10616                                    &buckets[0],
10617                                    &buckets[0],
10618                                    &buckets[0],
10619                                    &buckets[1],
10620                                    &buckets[1],
10621                                    &buckets[1],
10622                                    &buckets[1],
10623                                    &buckets[1],
10624                                    &buckets[2],
10625                                    &buckets[2],
10626                                    &buckets[2],
10627                                    &buckets[2],
10628                                    &buckets[2]),
10629              "non-power of 2");
10630
10631     bfds[1].local_state = BFD_STATE_down;
10632     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[1]);
10633
10634     fib_path_list_contribute_forwarding(pl_index,
10635                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10636                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10637                                         &dpo);
10638
10639     /*
10640      * path 1's buckets alternate between path 0 and 2
10641      */
10642     FIB_TEST(!fib_test_validate_lb(&dpo,
10643                                    16,
10644                                    &buckets[0],
10645                                    &buckets[0],
10646                                    &buckets[0],
10647                                    &buckets[0],
10648                                    &buckets[0],
10649                                    &buckets[0],
10650                                    &buckets[0],
10651                                    &buckets[2],
10652                                    &buckets[0],
10653                                    &buckets[2],
10654                                    &buckets[0],
10655                                    &buckets[2],
10656                                    &buckets[2],
10657                                    &buckets[2],
10658                                    &buckets[2],
10659                                    &buckets[2]),
10660              "non-power of 2");
10661     bfds[1].local_state = BFD_STATE_up;
10662     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[1]);
10663
10664     fib_path_list_unlock(pl_index);
10665
10666     /*
10667      * unequal cost
10668      */
10669     fib_route_path_t *r_paths3 = NULL;
10670
10671     r_paths3 = vec_dup(r_paths);
10672     _vec_len(r_paths3) = 3;
10673
10674     r_paths3[0].frp_weight = 3;
10675
10676     pl_index = fib_path_list_create(FIB_PATH_LIST_FLAG_SHARED, r_paths3);
10677     fib_path_list_lock(pl_index);
10678
10679     fib_path_list_contribute_forwarding(pl_index,
10680                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10681                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10682                                         &dpo);
10683
10684     FIB_TEST(!fib_test_validate_lb(&dpo,
10685                                    16,
10686                                    &buckets[1],
10687                                    &buckets[1],
10688                                    &buckets[1],
10689                                    &buckets[2],
10690                                    &buckets[2],
10691                                    &buckets[2],
10692                                    &buckets[0],
10693                                    &buckets[0],
10694                                    &buckets[0],
10695                                    &buckets[0],
10696                                    &buckets[0],
10697                                    &buckets[0],
10698                                    &buckets[0],
10699                                    &buckets[0],
10700                                    &buckets[0],
10701                                    &buckets[0]),
10702              "UCMP");
10703
10704     bfds[1].local_state = BFD_STATE_down;
10705     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[1]);
10706
10707     fib_path_list_contribute_forwarding(pl_index,
10708                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
10709                                         FIB_PATH_LIST_FWD_FLAG_STICKY,
10710                                         &dpo);
10711     /* No attempt to Un-equal distribute the down path's buckets */
10712     FIB_TEST(!fib_test_validate_lb(&dpo,
10713                                    16,
10714                                    &buckets[2],
10715                                    &buckets[0],
10716                                    &buckets[2],
10717                                    &buckets[2],
10718                                    &buckets[2],
10719                                    &buckets[2],
10720                                    &buckets[0],
10721                                    &buckets[0],
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              "UCMP");
10731     bfds[1].local_state = BFD_STATE_up;
10732     adj_bfd_notify(BFD_LISTEN_EVENT_UPDATE, &bfds[1]);
10733
10734     dpo_reset(&dpo);
10735     fib_path_list_unlock(pl_index);
10736
10737     vec_free(r_paths);
10738     vec_free(r_paths2);
10739     vec_free(r_paths3);
10740
10741     FIB_TEST(lb_count == pool_elts(load_balance_pool), "no leaked LBs");
10742     FIB_TEST(pl_count == fib_path_list_pool_size(), "no leaked PLs");
10743
10744     return 0;
10745 }
10746
10747 static clib_error_t *
10748 fib_test (vlib_main_t * vm,
10749           unformat_input_t * input,
10750           vlib_cli_command_t * cmd_arg)
10751 {
10752     int res;
10753
10754     res = 0;
10755
10756     fib_test_mk_intf(4);
10757
10758     if (unformat (input, "debug"))
10759     {
10760         fib_test_do_debug = 1;
10761     }
10762
10763     if (unformat (input, "ip4"))
10764     {
10765         res += fib_test_v4();
10766     }
10767     else if (unformat (input, "ip6"))
10768     {
10769         res += fib_test_v6();
10770     }
10771     else if (unformat (input, "ip"))
10772     {
10773         res += fib_test_v4();
10774         res += fib_test_v6();
10775     }
10776     else if (unformat (input, "label"))
10777     {
10778         res += fib_test_label();
10779     }
10780     else if (unformat (input, "ae"))
10781     {
10782         res += fib_test_ae();
10783     }
10784     else if (unformat (input, "pref"))
10785     {
10786         res += fib_test_pref();
10787     }
10788     else if (unformat (input, "lfib"))
10789     {
10790         res += lfib_test();
10791     }
10792     else if (unformat (input, "walk"))
10793     {
10794         res += fib_test_walk();
10795     }
10796     else if (unformat (input, "bfd"))
10797     {
10798         res += fib_test_bfd();
10799     }
10800     else if (unformat (input, "inherit"))
10801     {
10802         res += fib_test_inherit();
10803     }
10804     else if (unformat (input, "sticky"))
10805     {
10806         res += fib_test_sticky();
10807     }
10808     else
10809     {
10810         res += fib_test_v4();
10811         res += fib_test_v6();
10812         res += fib_test_ae();
10813         res += fib_test_bfd();
10814         res += fib_test_pref();
10815         res += fib_test_label();
10816         res += fib_test_inherit();
10817         res += lfib_test();
10818
10819         /*
10820          * fib-walk process must be disabled in order for the walk tests to work
10821          */
10822         fib_walk_process_disable();
10823         res += fib_test_walk();
10824         fib_walk_process_enable();
10825     }
10826
10827     fflush(NULL);
10828     if (res)
10829     {
10830         return clib_error_return(0, "FIB Unit Test Failed");
10831     }
10832     else
10833     {
10834         return (NULL);
10835     }
10836 }
10837
10838 VLIB_CLI_COMMAND (test_fib_command, static) = {
10839     .path = "test fib",
10840     .short_help = "fib unit tests - DO NOT RUN ON A LIVE SYSTEM",
10841     .function = fib_test,
10842 };
10843
10844 clib_error_t *
10845 fib_test_init (vlib_main_t *vm)
10846 {
10847     return 0;
10848 }
10849
10850 VLIB_INIT_FUNCTION (fib_test_init);
10851
10852 // clang-format on