src/vnet/fib/ip6_fib.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/ip6_fib.h>
  17 #include <vnet/fib/fib_table.h>
  18
  19 static void
  20 vnet_ip6_fib_init (u32 fib_index)
  21 {
  22     fib_prefix_t pfx = {
  23         .fp_proto = FIB_PROTOCOL_IP6,
  24         .fp_len = 0,
  25         .fp_addr = {
  26             .ip6 = {
  27                 { 0, 0, },
  28             },
  29         }
  30     };
  31
  32     /*
  33      * Add the default route.
  34      */
  35     fib_table_entry_special_add(fib_index,
  36                                 &pfx,
  37                                 FIB_SOURCE_DEFAULT_ROUTE,
  38                                 FIB_ENTRY_FLAG_DROP);
  39
  40     /*
  41      * all link local for us
  42      */
  43     pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
  44     pfx.fp_addr.ip6.as_u64[1] = 0;
  45     pfx.fp_len = 10;
  46     fib_table_entry_special_add(fib_index,
  47                                 &pfx,
  48                                 FIB_SOURCE_SPECIAL,
  49                                 FIB_ENTRY_FLAG_LOCAL);
  50 }
  51
  52 static u32
  53 create_fib_with_table_id (u32 table_id)
  54 {
  55     fib_table_t *fib_table;
  56     ip6_fib_t *v6_fib;
  57
  58     pool_get_aligned(ip6_main.fibs, fib_table, CLIB_CACHE_LINE_BYTES);
  59     pool_get_aligned(ip6_main.v6_fibs, v6_fib, CLIB_CACHE_LINE_BYTES);
  60
  61     memset(fib_table, 0, sizeof(*fib_table));
  62     memset(v6_fib, 0, sizeof(*v6_fib));
  63
  64     ASSERT((fib_table - ip6_main.fibs) ==
  65            (v6_fib - ip6_main.v6_fibs));
  66
  67     fib_table->ft_proto = FIB_PROTOCOL_IP6;
  68     fib_table->ft_index =
  69             v6_fib->index =
  70                 (fib_table - ip6_main.fibs);
  71
  72     hash_set(ip6_main.fib_index_by_table_id, table_id, fib_table->ft_index);
  73
  74     fib_table->ft_table_id =
  75         v6_fib->table_id =
  76             table_id;
  77     fib_table->ft_flow_hash_config = IP_FLOW_HASH_DEFAULT;
  78
  79     vnet_ip6_fib_init(fib_table->ft_index);
  80     fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP6);
  81
  82     return (fib_table->ft_index);
  83 }
  84
  85 u32
  86 ip6_fib_table_find_or_create_and_lock (u32 table_id)
  87 {
  88     uword * p;
  89
  90     p = hash_get (ip6_main.fib_index_by_table_id, table_id);
  91     if (NULL == p)
  92         return create_fib_with_table_id(table_id);
  93
  94     fib_table_lock(p[0], FIB_PROTOCOL_IP6);
  95
  96     return (p[0]);
  97 }
  98
  99 u32
 100 ip6_fib_table_create_and_lock (void)
 101 {
 102     return (create_fib_with_table_id(~0));
 103 }
 104
 105 void
 106 ip6_fib_table_destroy (u32 fib_index)
 107 {
 108     fib_prefix_t pfx = {
 109         .fp_proto = FIB_PROTOCOL_IP6,
 110         .fp_len = 0,
 111         .fp_addr = {
 112             .ip6 = {
 113                 { 0, 0, },
 114             },
 115         }
 116     };
 117
 118     /*
 119      * the default route.
 120      */
 121     fib_table_entry_special_remove(fib_index,
 122                                    &pfx,
 123                                    FIB_SOURCE_DEFAULT_ROUTE);
 124
 125
 126     /*
 127      * ff02::1:ff00:0/104
 128      */
 129     ip6_set_solicited_node_multicast_address(&pfx.fp_addr.ip6, 0);
 130     pfx.fp_len = 104;
 131     fib_table_entry_special_remove(fib_index,
 132                                    &pfx,
 133                                    FIB_SOURCE_SPECIAL);
 134
 135     /*
 136      * all-routers multicast address
 137      */
 138     ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
 139                                         IP6_MULTICAST_SCOPE_link_local,
 140                                         IP6_MULTICAST_GROUP_ID_all_routers);
 141     pfx.fp_len = 128;
 142     fib_table_entry_special_remove(fib_index,
 143                                    &pfx,
 144                                    FIB_SOURCE_SPECIAL);
 145
 146     /*
 147      * all-nodes multicast address
 148      */
 149     ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
 150                                         IP6_MULTICAST_SCOPE_link_local,
 151                                         IP6_MULTICAST_GROUP_ID_all_hosts);
 152     pfx.fp_len = 128;
 153     fib_table_entry_special_remove(fib_index,
 154                                    &pfx,
 155                                    FIB_SOURCE_SPECIAL);
 156
 157     /*
 158      * all-mldv2 multicast address
 159      */
 160     ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
 161                                         IP6_MULTICAST_SCOPE_link_local,
 162                                         IP6_MULTICAST_GROUP_ID_mldv2_routers);
 163     pfx.fp_len = 128;
 164     fib_table_entry_special_remove(fib_index,
 165                                    &pfx,
 166                                    FIB_SOURCE_SPECIAL);
 167
 168     /*
 169      * all link local
 170      */
 171     pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
 172     pfx.fp_addr.ip6.as_u64[1] = 0;
 173     pfx.fp_len = 10;
 174     fib_table_entry_special_remove(fib_index,
 175                                    &pfx,
 176                                    FIB_SOURCE_SPECIAL);
 177
 178     fib_table_t *fib_table = fib_table_get(fib_index, FIB_PROTOCOL_IP6);
 179     fib_source_t source;
 180
 181      /*
 182      * validate no more routes.
 183      */
 184     ASSERT(0 == fib_table->ft_total_route_counts);
 185     FOR_EACH_FIB_SOURCE(source)
 186     {
 187         ASSERT(0 == fib_table->ft_src_route_counts[source]);
 188     }
 189
 190     if (~0 != fib_table->ft_table_id)
 191     {
 192         hash_unset (ip6_main.fib_index_by_table_id, fib_table->ft_table_id);
 193     }
 194     pool_put_index(ip6_main.v6_fibs, fib_table->ft_index);
 195     pool_put(ip6_main.fibs, fib_table);
 196 }
 197
 198 fib_node_index_t
 199 ip6_fib_table_lookup (u32 fib_index,
 200                       const ip6_address_t *addr,
 201                       u32 len)
 202 {
 203     const ip6_fib_table_instance_t *table;
 204     BVT(clib_bihash_kv) kv, value;
 205     int i, n_p, rv;
 206     u64 fib;
 207
 208     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 209     n_p = vec_len (table->prefix_lengths_in_search_order);
 210
 211     kv.key[0] = addr->as_u64[0];
 212     kv.key[1] = addr->as_u64[1];
 213     fib = ((u64)((fib_index))<<32);
 214
 215     /*
 216      * start search from a mask length same length or shorter.
 217      * we don't want matches longer than the mask passed
 218      */
 219     i = 0;
 220     while (i < n_p && table->prefix_lengths_in_search_order[i] > len)
 221     {
 222         i++;
 223     }
 224
 225     for (; i < n_p; i++)
 226     {
 227         int dst_address_length = table->prefix_lengths_in_search_order[i];
 228         ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
 229
 230         ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
 231         //As lengths are decreasing, masks are increasingly specific.
 232         kv.key[0] &= mask->as_u64[0];
 233         kv.key[1] &= mask->as_u64[1];
 234         kv.key[2] = fib | dst_address_length;
 235
 236         rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
 237         if (rv == 0)
 238             return value.value;
 239     }
 240
 241     return (FIB_NODE_INDEX_INVALID);
 242 }
 243
 244 fib_node_index_t
 245 ip6_fib_table_lookup_exact_match (u32 fib_index,
 246                                   const ip6_address_t *addr,
 247                                   u32 len)
 248 {
 249     const ip6_fib_table_instance_t *table;
 250     BVT(clib_bihash_kv) kv, value;
 251     ip6_address_t *mask;
 252     u64 fib;
 253     int rv;
 254
 255     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 256     mask = &ip6_main.fib_masks[len];
 257     fib = ((u64)((fib_index))<<32);
 258
 259     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 260     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 261     kv.key[2] = fib | len;
 262
 263     rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
 264     if (rv == 0)
 265         return value.value;
 266
 267     return (FIB_NODE_INDEX_INVALID);
 268 }
 269
 270 static void
 271 compute_prefix_lengths_in_search_order (ip6_fib_table_instance_t *table)
 272 {
 273     int i;
 274     vec_reset_length (table->prefix_lengths_in_search_order);
 275     /* Note: bitmap reversed so this is in fact a longest prefix match */
 276     clib_bitmap_foreach (i, table->non_empty_dst_address_length_bitmap,
 277     ({
 278         int dst_address_length = 128 - i;
 279         vec_add1(table->prefix_lengths_in_search_order, dst_address_length);
 280     }));
 281 }
 282
 283 void
 284 ip6_fib_table_entry_remove (u32 fib_index,
 285                             const ip6_address_t *addr,
 286                             u32 len)
 287 {
 288     ip6_fib_table_instance_t *table;
 289     BVT(clib_bihash_kv) kv;
 290     ip6_address_t *mask;
 291     u64 fib;
 292
 293     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 294     mask = &ip6_main.fib_masks[len];
 295     fib = ((u64)((fib_index))<<32);
 296
 297     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 298     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 299     kv.key[2] = fib | len;
 300
 301     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 0);
 302
 303     /* refcount accounting */
 304     ASSERT (table->dst_address_length_refcounts[len] > 0);
 305     if (--table->dst_address_length_refcounts[len] == 0)
 306     {
 307         table->non_empty_dst_address_length_bitmap =
 308             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 309                              128 - len, 0);
 310         compute_prefix_lengths_in_search_order (table);
 311     }
 312 }
 313
 314 void
 315 ip6_fib_table_entry_insert (u32 fib_index,
 316                             const ip6_address_t *addr,
 317                             u32 len,
 318                             fib_node_index_t fib_entry_index)
 319 {
 320     ip6_fib_table_instance_t *table;
 321     BVT(clib_bihash_kv) kv;
 322     ip6_address_t *mask;
 323     u64 fib;
 324
 325     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 326     mask = &ip6_main.fib_masks[len];
 327     fib = ((u64)((fib_index))<<32);
 328
 329     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 330     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 331     kv.key[2] = fib | len;
 332     kv.value = fib_entry_index;
 333
 334     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 1);
 335
 336     table->dst_address_length_refcounts[len]++;
 337
 338     table->non_empty_dst_address_length_bitmap =
 339         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 340                          128 - len, 1);
 341     compute_prefix_lengths_in_search_order (table);
 342 }
 343
 344 u32
 345 ip6_fib_table_fwding_lookup (ip6_main_t * im,
 346                              u32 fib_index,
 347                              const ip6_address_t * dst)
 348 {
 349     const ip6_fib_table_instance_t *table;
 350     int i, len;
 351     int rv;
 352     BVT(clib_bihash_kv) kv, value;
 353     u64 fib;
 354
 355     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 356     len = vec_len (table->prefix_lengths_in_search_order);
 357
 358     kv.key[0] = dst->as_u64[0];
 359     kv.key[1] = dst->as_u64[1];
 360     fib = ((u64)((fib_index))<<32);
 361
 362     for (i = 0; i < len; i++)
 363     {
 364         int dst_address_length = table->prefix_lengths_in_search_order[i];
 365         ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
 366
 367         ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
 368         //As lengths are decreasing, masks are increasingly specific.
 369         kv.key[0] &= mask->as_u64[0];
 370         kv.key[1] &= mask->as_u64[1];
 371         kv.key[2] = fib | dst_address_length;
 372
 373         rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
 374         if (rv == 0)
 375             return value.value;
 376     }
 377
 378     /* default route is always present */
 379     ASSERT(0);
 380     return 0;
 381 }
 382
 383 u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
 384                                                u32 sw_if_index,
 385                                                const ip6_address_t * dst)
 386 {
 387     u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
 388     return ip6_fib_table_fwding_lookup(im, fib_index, dst);
 389 }
 390
 391 u32
 392 ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
 393 {
 394     if (sw_if_index >= vec_len(ip6_main.fib_index_by_sw_if_index))
 395     {
 396         /*
 397          * This is the case for interfaces that are not yet mapped to
 398          * a IP table
 399          */
 400         return (~0);
 401     }
 402     return (ip6_main.fib_index_by_sw_if_index[sw_if_index]);
 403 }
 404
 405 void
 406 ip6_fib_table_fwding_dpo_update (u32 fib_index,
 407                                  const ip6_address_t *addr,
 408                                  u32 len,
 409                                  const dpo_id_t *dpo)
 410 {
 411     ip6_fib_table_instance_t *table;
 412     BVT(clib_bihash_kv) kv;
 413     ip6_address_t *mask;
 414     u64 fib;
 415
 416     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 417     mask = &ip6_main.fib_masks[len];
 418     fib = ((u64)((fib_index))<<32);
 419
 420     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 421     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 422     kv.key[2] = fib | len;
 423     kv.value = dpo->dpoi_index;
 424
 425     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 1);
 426
 427     table->dst_address_length_refcounts[len]++;
 428
 429     table->non_empty_dst_address_length_bitmap =
 430         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 431                          128 - len, 1);
 432     compute_prefix_lengths_in_search_order (table);
 433 }
 434
 435 void
 436 ip6_fib_table_fwding_dpo_remove (u32 fib_index,
 437                                  const ip6_address_t *addr,
 438                                  u32 len,
 439                                  const dpo_id_t *dpo)
 440 {
 441     ip6_fib_table_instance_t *table;
 442     BVT(clib_bihash_kv) kv;
 443     ip6_address_t *mask;
 444     u64 fib;
 445
 446     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 447     mask = &ip6_main.fib_masks[len];
 448     fib = ((u64)((fib_index))<<32);
 449
 450     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 451     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 452     kv.key[2] = fib | len;
 453     kv.value = dpo->dpoi_index;
 454
 455     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 0);
 456
 457     /* refcount accounting */
 458     ASSERT (table->dst_address_length_refcounts[len] > 0);
 459     if (--table->dst_address_length_refcounts[len] == 0)
 460     {
 461         table->non_empty_dst_address_length_bitmap =
 462             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 463                              128 - len, 0);
 464         compute_prefix_lengths_in_search_order (table);
 465     }
 466 }
 467
 468 /**
 469  * @brief Context when walking the IPv6 table. Since all VRFs are in the
 470  * same hash table, we need to filter only those we need as we walk
 471  */
 472 typedef struct ip6_fib_walk_ctx_t_
 473 {
 474     u32 i6w_fib_index;
 475     fib_table_walk_fn_t i6w_fn;
 476     void *i6w_ctx;
 477 } ip6_fib_walk_ctx_t;
 478
 479 static int
 480 ip6_fib_walk_cb (clib_bihash_kv_24_8_t * kvp,
 481                  void *arg)
 482 {
 483     ip6_fib_walk_ctx_t *ctx = arg;
 484
 485     if ((kvp->key[2] >> 32) == ctx->i6w_fib_index)
 486     {
 487         ctx->i6w_fn(kvp->value, ctx->i6w_ctx);
 488     }
 489
 490     return (1);
 491 }
 492
 493 void
 494 ip6_fib_table_walk (u32 fib_index,
 495                     fib_table_walk_fn_t fn,
 496                     void *arg)
 497 {
 498     ip6_fib_walk_ctx_t ctx = {
 499         .i6w_fib_index = fib_index,
 500         .i6w_fn = fn,
 501         .i6w_ctx = arg,
 502     };
 503     ip6_main_t *im = &ip6_main;
 504
 505     BV(clib_bihash_foreach_key_value_pair)(&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 506                                            ip6_fib_walk_cb,
 507                                            &ctx);
 508
 509 }
 510
 511 typedef struct ip6_fib_show_ctx_t_ {
 512     fib_node_index_t *entries;
 513 } ip6_fib_show_ctx_t;
 514
 515 static int
 516 ip6_fib_table_show_walk (fib_node_index_t fib_entry_index,
 517                          void *arg)
 518 {
 519     ip6_fib_show_ctx_t *ctx = arg;
 520
 521     vec_add1(ctx->entries, fib_entry_index);
 522
 523     return (1);
 524 }
 525
 526 static void
 527 ip6_fib_table_show_all (ip6_fib_t *fib,
 528                         vlib_main_t * vm)
 529 {
 530     fib_node_index_t *fib_entry_index;
 531     ip6_fib_show_ctx_t ctx = {
 532         .entries = NULL,
 533     };
 534
 535     ip6_fib_table_walk(fib->index, ip6_fib_table_show_walk, &ctx);
 536     vec_sort_with_function(ctx.entries, fib_entry_cmp_for_sort);
 537
 538     vec_foreach(fib_entry_index, ctx.entries)
 539     {
 540         vlib_cli_output(vm, "%U",
 541                         format_fib_entry,
 542                         *fib_entry_index,
 543                         FIB_ENTRY_FORMAT_BRIEF);
 544     }
 545
 546     vec_free(ctx.entries);
 547 }
 548
 549 static void
 550 ip6_fib_table_show_one (ip6_fib_t *fib,
 551                         vlib_main_t * vm,
 552                         ip6_address_t *address,
 553                         u32 mask_len,
 554                         int detail)
 555 {
 556     vlib_cli_output(vm, "%U",
 557                     format_fib_entry,
 558                     ip6_fib_table_lookup(fib->index, address, mask_len),
 559                     (detail ?
 560                      FIB_ENTRY_FORMAT_DETAIL2:
 561                      FIB_ENTRY_FORMAT_DETAIL));
 562 }
 563
 564 typedef struct {
 565   u32 fib_index;
 566   u64 count_by_prefix_length[129];
 567 } count_routes_in_fib_at_prefix_length_arg_t;
 568
 569 static void
 570 count_routes_in_fib_at_prefix_length (BVT(clib_bihash_kv) * kvp,
 571                                       void *arg)
 572 {
 573   count_routes_in_fib_at_prefix_length_arg_t * ap = arg;
 574   int mask_width;
 575
 576   if ((kvp->key[2]>>32) != ap->fib_index)
 577     return;
 578
 579   mask_width = kvp->key[2] & 0xFF;
 580
 581   ap->count_by_prefix_length[mask_width]++;
 582 }
 583
 584 static clib_error_t *
 585 ip6_show_fib (vlib_main_t * vm,
 586               unformat_input_t * input,
 587               vlib_cli_command_t * cmd)
 588 {
 589     count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
 590     ip6_main_t * im6 = &ip6_main;
 591     fib_table_t *fib_table;
 592     ip6_fib_t * fib;
 593     int verbose, matching;
 594     ip6_address_t matching_address;
 595     u32 mask_len  = 128;
 596     int table_id = -1, fib_index = ~0;
 597     int detail = 0;
 598
 599     verbose = 1;
 600     matching = 0;
 601
 602     while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 603     {
 604         if (unformat (input, "brief")   ||
 605             unformat (input, "summary") ||
 606             unformat (input, "sum"))
 607             verbose = 0;
 608
 609         else if (unformat (input, "detail")   ||
 610                  unformat (input, "det"))
 611             detail = 1;
 612
 613         else if (unformat (input, "%U/%d",
 614                            unformat_ip6_address, &matching_address, &mask_len))
 615             matching = 1;
 616
 617         else if (unformat (input, "%U", unformat_ip6_address, &matching_address))
 618             matching = 1;
 619
 620         else if (unformat (input, "table %d", &table_id))
 621             ;
 622         else if (unformat (input, "index %d", &fib_index))
 623             ;
 624         else
 625             break;
 626     }
 627
 628     pool_foreach (fib_table, im6->fibs,
 629     ({
 630         fib = pool_elt_at_index(im6->v6_fibs, fib_table->ft_index);
 631         if (table_id >= 0 && table_id != (int)fib->table_id)
 632             continue;
 633         if (fib_index != ~0 && fib_index != (int)fib->index)
 634             continue;
 635
 636         vlib_cli_output (vm, "%s, fib_index %d, flow hash: %U",
 637                          fib_table->ft_desc, fib->index,
 638                          format_ip_flow_hash_config, fib_table->ft_flow_hash_config);
 639
 640         /* Show summary? */
 641         if (! verbose)
 642         {
 643             BVT(clib_bihash) * h = &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
 644             int len;
 645
 646             vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
 647
 648             memset (ca, 0, sizeof(*ca));
 649             ca->fib_index = fib->index;
 650
 651             BV(clib_bihash_foreach_key_value_pair)
 652                 (h, count_routes_in_fib_at_prefix_length, ca);
 653
 654             for (len = 128; len >= 0; len--)
 655             {
 656                 if (ca->count_by_prefix_length[len])
 657                     vlib_cli_output (vm, "%=20d%=16lld",
 658                                      len, ca->count_by_prefix_length[len]);
 659             }
 660             continue;
 661         }
 662
 663         if (!matching)
 664         {
 665             ip6_fib_table_show_all(fib, vm);
 666         }
 667         else
 668         {
 669             ip6_fib_table_show_one(fib, vm, &matching_address, mask_len, detail);
 670         }
 671     }));
 672
 673     return 0;
 674 }
 675
 676 /*?
 677  * This command displays the IPv6 FIB Tables (VRF Tables) and the route
 678  * entries for each table.
 679  *
 680  * @note This command will run for a long time when the FIB tables are
 681  * comprised of millions of entries. For those senarios, consider displaying
 682  * in summary mode.
 683  *
 684  * @cliexpar
 685  * @parblock
 686  * Example of how to display all the IPv6 FIB tables:
 687  * @cliexstart{show ip6 fib}
 688  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 689  * @::/0
 690  *   unicast-ip6-chain
 691  *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
 692  *     [0] [@0]: dpo-drop ip6
 693  * fe80::/10
 694  *   unicast-ip6-chain
 695  *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
 696  *     [0] [@2]: dpo-receive
 697  * ff02::1/128
 698  *   unicast-ip6-chain
 699  *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
 700  *     [0] [@2]: dpo-receive
 701  * ff02::2/128
 702  *   unicast-ip6-chain
 703  *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
 704  *     [0] [@2]: dpo-receive
 705  * ff02::16/128
 706  *   unicast-ip6-chain
 707  *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
 708  *     [0] [@2]: dpo-receive
 709  * ff02::1:ff00:0/104
 710  *   unicast-ip6-chain
 711  *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
 712  *     [0] [@2]: dpo-receive
 713  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 714  * @::/0
 715  *   unicast-ip6-chain
 716  *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 717  *     [0] [@0]: dpo-drop ip6
 718  * @::a:1:1:0:4/126
 719  *   unicast-ip6-chain
 720  *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
 721  *     [0] [@4]: ipv6-glean: af_packet0
 722  * @::a:1:1:0:7/128
 723  *   unicast-ip6-chain
 724  *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
 725  *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
 726  * fe80::/10
 727  *   unicast-ip6-chain
 728  *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
 729  *     [0] [@2]: dpo-receive
 730  * fe80::fe:3eff:fe3e:9222/128
 731  *   unicast-ip6-chain
 732  *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
 733  *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
 734  * ff02::1/128
 735  *   unicast-ip6-chain
 736  *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
 737  *     [0] [@2]: dpo-receive
 738  * ff02::2/128
 739  *   unicast-ip6-chain
 740  *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
 741  *     [0] [@2]: dpo-receive
 742  * ff02::16/128
 743  *   unicast-ip6-chain
 744  *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
 745  *     [0] [@2]: dpo-receive
 746  * ff02::1:ff00:0/104
 747  *   unicast-ip6-chain
 748  *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
 749  *     [0] [@2]: dpo-receive
 750  * @cliexend
 751  *
 752  * Example of how to display a summary of all IPv6 FIB tables:
 753  * @cliexstart{show ip6 fib summary}
 754  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 755  *     Prefix length         Count
 756  *          128                3
 757  *          104                1
 758  *          10                 1
 759  *           0                 1
 760  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 761  *     Prefix length         Count
 762  *          128                5
 763  *          126                1
 764  *          104                1
 765  *          10                 1
 766  *           0                 1
 767  * @cliexend
 768  * @endparblock
 769  ?*/
 770 /* *INDENT-OFF* */
 771 VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
 772     .path = "show ip6 fib",
 773     .short_help = "show ip6 fib [summary] [table <table-id>] [index <fib-id>] [<ip6-addr>[/<width>]] [detail]",
 774     .function = ip6_show_fib,
 775 };
 776 /* *INDENT-ON* */