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                                 ADJ_INDEX_INVALID);
  40
  41     /*
  42      * Add ff02::1:ff00:0/104 via local route for all tables.
  43      *  This is required for neighbor discovery to work.
  44      */
  45     ip6_set_solicited_node_multicast_address(&pfx.fp_addr.ip6, 0);
  46     pfx.fp_len = 104;
  47     fib_table_entry_special_add(fib_index,
  48                                 &pfx,
  49                                 FIB_SOURCE_SPECIAL,
  50                                 FIB_ENTRY_FLAG_LOCAL,
  51                                 ADJ_INDEX_INVALID);
  52
  53     /*
  54      * Add all-routers multicast address via local route for all tables
  55      */
  56     ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
  57                                         IP6_MULTICAST_SCOPE_link_local,
  58                                         IP6_MULTICAST_GROUP_ID_all_routers);
  59     pfx.fp_len = 128;
  60     fib_table_entry_special_add(fib_index,
  61                                 &pfx,
  62                                 FIB_SOURCE_SPECIAL,
  63                                 FIB_ENTRY_FLAG_LOCAL,
  64                                 ADJ_INDEX_INVALID);
  65
  66     /*
  67      * Add all-nodes multicast address via local route for all tables
  68      */
  69     ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
  70                                         IP6_MULTICAST_SCOPE_link_local,
  71                                         IP6_MULTICAST_GROUP_ID_all_hosts);
  72     pfx.fp_len = 128;
  73     fib_table_entry_special_add(fib_index,
  74                                 &pfx,
  75                                 FIB_SOURCE_SPECIAL,
  76                                 FIB_ENTRY_FLAG_LOCAL,
  77                                 ADJ_INDEX_INVALID);
  78
  79     /*
  80      *  Add all-mldv2  multicast address via local route for all tables
  81      */
  82     ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
  83                                         IP6_MULTICAST_SCOPE_link_local,
  84                                         IP6_MULTICAST_GROUP_ID_mldv2_routers);
  85     pfx.fp_len = 128;
  86     fib_table_entry_special_add(fib_index,
  87                                 &pfx,
  88                                 FIB_SOURCE_SPECIAL,
  89                                 FIB_ENTRY_FLAG_LOCAL,
  90                                 ADJ_INDEX_INVALID);
  91
  92     /*
  93      * all link local for us
  94      */
  95     pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
  96     pfx.fp_addr.ip6.as_u64[1] = 0;
  97     pfx.fp_len = 10;
  98     fib_table_entry_special_add(fib_index,
  99                                 &pfx,
 100                                 FIB_SOURCE_SPECIAL,
 101                                 FIB_ENTRY_FLAG_LOCAL,
 102                                 ADJ_INDEX_INVALID);
 103 }
 104
 105 static u32
 106 create_fib_with_table_id (u32 table_id)
 107 {
 108     fib_table_t *fib_table;
 109
 110     pool_get_aligned(ip6_main.fibs, fib_table, CLIB_CACHE_LINE_BYTES);
 111     memset(fib_table, 0, sizeof(*fib_table));
 112
 113     fib_table->ft_proto = FIB_PROTOCOL_IP6;
 114     fib_table->ft_index =
 115         fib_table->v6.index =
 116             (fib_table - ip6_main.fibs);
 117
 118     hash_set(ip6_main.fib_index_by_table_id, table_id, fib_table->ft_index);
 119
 120     fib_table->ft_table_id =
 121         fib_table->v6.table_id =
 122             table_id;
 123     fib_table->ft_flow_hash_config =
 124         fib_table->v6.flow_hash_config =
 125             IP_FLOW_HASH_DEFAULT;
 126
 127     vnet_ip6_fib_init(fib_table->ft_index);
 128     fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP6);
 129
 130     return (fib_table->ft_index);
 131 }
 132
 133 u32
 134 ip6_fib_table_find_or_create_and_lock (u32 table_id)
 135 {
 136     uword * p;
 137
 138     p = hash_get (ip6_main.fib_index_by_table_id, table_id);
 139     if (NULL == p)
 140         return create_fib_with_table_id(table_id);
 141
 142     fib_table_lock(p[0], FIB_PROTOCOL_IP6);
 143
 144     return (p[0]);
 145 }
 146
 147 u32
 148 ip6_fib_table_create_and_lock (void)
 149 {
 150     return (create_fib_with_table_id(~0));
 151 }
 152
 153 void
 154 ip6_fib_table_destroy (u32 fib_index)
 155 {
 156     fib_prefix_t pfx = {
 157         .fp_proto = FIB_PROTOCOL_IP6,
 158         .fp_len = 0,
 159         .fp_addr = {
 160             .ip6 = {
 161                 { 0, 0, },
 162             },
 163         }
 164     };
 165
 166     /*
 167      * the default route.
 168      */
 169     fib_table_entry_special_remove(fib_index,
 170                                    &pfx,
 171                                    FIB_SOURCE_DEFAULT_ROUTE);
 172
 173
 174     /*
 175      * ff02::1:ff00:0/104
 176      */
 177     ip6_set_solicited_node_multicast_address(&pfx.fp_addr.ip6, 0);
 178     pfx.fp_len = 104;
 179     fib_table_entry_special_remove(fib_index,
 180                                    &pfx,
 181                                    FIB_SOURCE_SPECIAL);
 182
 183     /*
 184      * all-routers multicast address
 185      */
 186     ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
 187                                         IP6_MULTICAST_SCOPE_link_local,
 188                                         IP6_MULTICAST_GROUP_ID_all_routers);
 189     pfx.fp_len = 128;
 190     fib_table_entry_special_remove(fib_index,
 191                                    &pfx,
 192                                    FIB_SOURCE_SPECIAL);
 193
 194     /*
 195      * all-nodes multicast address
 196      */
 197     ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
 198                                         IP6_MULTICAST_SCOPE_link_local,
 199                                         IP6_MULTICAST_GROUP_ID_all_hosts);
 200     pfx.fp_len = 128;
 201     fib_table_entry_special_remove(fib_index,
 202                                    &pfx,
 203                                    FIB_SOURCE_SPECIAL);
 204
 205     /*
 206      * all-mldv2 multicast address
 207      */
 208     ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
 209                                         IP6_MULTICAST_SCOPE_link_local,
 210                                         IP6_MULTICAST_GROUP_ID_mldv2_routers);
 211     pfx.fp_len = 128;
 212     fib_table_entry_special_remove(fib_index,
 213                                    &pfx,
 214                                    FIB_SOURCE_SPECIAL);
 215
 216     /*
 217      * all link local
 218      */
 219     pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
 220     pfx.fp_addr.ip6.as_u64[1] = 0;
 221     pfx.fp_len = 10;
 222     fib_table_entry_special_remove(fib_index,
 223                                    &pfx,
 224                                    FIB_SOURCE_SPECIAL);
 225
 226     fib_table_t *fib_table = fib_table_get(fib_index, FIB_PROTOCOL_IP6);
 227     fib_source_t source;
 228
 229      /*
 230      * validate no more routes.
 231      */
 232     ASSERT(0 == fib_table->ft_total_route_counts);
 233     FOR_EACH_FIB_SOURCE(source)
 234     {
 235         ASSERT(0 == fib_table->ft_src_route_counts[source]);
 236     }
 237
 238     if (~0 != fib_table->ft_table_id)
 239     {
 240         hash_unset (ip6_main.fib_index_by_table_id, fib_table->ft_table_id);
 241     }
 242     pool_put(ip6_main.fibs, fib_table);
 243 }
 244
 245 fib_node_index_t
 246 ip6_fib_table_lookup (u32 fib_index,
 247                       const ip6_address_t *addr,
 248                       u32 len)
 249 {
 250     const ip6_fib_table_instance_t *table;
 251     BVT(clib_bihash_kv) kv, value;
 252     int i, n_p, rv;
 253     u64 fib;
 254
 255     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 256     n_p = vec_len (table->prefix_lengths_in_search_order);
 257
 258     kv.key[0] = addr->as_u64[0];
 259     kv.key[1] = addr->as_u64[1];
 260     fib = ((u64)((fib_index))<<32);
 261
 262     /*
 263      * start search from a mask length same length or shorter.
 264      * we don't want matches longer than the mask passed
 265      */
 266     i = 0;
 267     while (i < n_p && table->prefix_lengths_in_search_order[i] > len)
 268     {
 269         i++;
 270     }
 271
 272     for (; i < n_p; i++)
 273     {
 274         int dst_address_length = table->prefix_lengths_in_search_order[i];
 275         ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
 276
 277         ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
 278         //As lengths are decreasing, masks are increasingly specific.
 279         kv.key[0] &= mask->as_u64[0];
 280         kv.key[1] &= mask->as_u64[1];
 281         kv.key[2] = fib | dst_address_length;
 282
 283         rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
 284         if (rv == 0)
 285             return value.value;
 286     }
 287
 288     return (FIB_NODE_INDEX_INVALID);
 289 }
 290
 291 fib_node_index_t
 292 ip6_fib_table_lookup_exact_match (u32 fib_index,
 293                                   const ip6_address_t *addr,
 294                                   u32 len)
 295 {
 296     const ip6_fib_table_instance_t *table;
 297     BVT(clib_bihash_kv) kv, value;
 298     ip6_address_t *mask;
 299     u64 fib;
 300     int rv;
 301
 302     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 303     mask = &ip6_main.fib_masks[len];
 304     fib = ((u64)((fib_index))<<32);
 305
 306     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 307     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 308     kv.key[2] = fib | len;
 309
 310     rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
 311     if (rv == 0)
 312         return value.value;
 313
 314     return (FIB_NODE_INDEX_INVALID);
 315 }
 316
 317 static void
 318 compute_prefix_lengths_in_search_order (ip6_fib_table_instance_t *table)
 319 {
 320     int i;
 321     vec_reset_length (table->prefix_lengths_in_search_order);
 322     /* Note: bitmap reversed so this is in fact a longest prefix match */
 323     clib_bitmap_foreach (i, table->non_empty_dst_address_length_bitmap,
 324     ({
 325         int dst_address_length = 128 - i;
 326         vec_add1(table->prefix_lengths_in_search_order, dst_address_length);
 327     }));
 328 }
 329
 330 void
 331 ip6_fib_table_entry_remove (u32 fib_index,
 332                             const ip6_address_t *addr,
 333                             u32 len)
 334 {
 335     ip6_fib_table_instance_t *table;
 336     BVT(clib_bihash_kv) kv;
 337     ip6_address_t *mask;
 338     u64 fib;
 339
 340     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 341     mask = &ip6_main.fib_masks[len];
 342     fib = ((u64)((fib_index))<<32);
 343
 344     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 345     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 346     kv.key[2] = fib | len;
 347
 348     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 0);
 349
 350     /* refcount accounting */
 351     ASSERT (table->dst_address_length_refcounts[len] > 0);
 352     if (--table->dst_address_length_refcounts[len] == 0)
 353     {
 354         table->non_empty_dst_address_length_bitmap =
 355             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 356                              128 - len, 0);
 357         compute_prefix_lengths_in_search_order (table);
 358     }
 359 }
 360
 361 void
 362 ip6_fib_table_entry_insert (u32 fib_index,
 363                             const ip6_address_t *addr,
 364                             u32 len,
 365                             fib_node_index_t fib_entry_index)
 366 {
 367     ip6_fib_table_instance_t *table;
 368     BVT(clib_bihash_kv) kv;
 369     ip6_address_t *mask;
 370     u64 fib;
 371
 372     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 373     mask = &ip6_main.fib_masks[len];
 374     fib = ((u64)((fib_index))<<32);
 375
 376     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 377     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 378     kv.key[2] = fib | len;
 379     kv.value = fib_entry_index;
 380
 381     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 1);
 382
 383     table->dst_address_length_refcounts[len]++;
 384
 385     table->non_empty_dst_address_length_bitmap =
 386         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 387                          128 - len, 1);
 388     compute_prefix_lengths_in_search_order (table);
 389 }
 390
 391 u32
 392 ip6_fib_table_fwding_lookup (ip6_main_t * im,
 393                              u32 fib_index,
 394                              const ip6_address_t * dst)
 395 {
 396     const ip6_fib_table_instance_t *table;
 397     int i, len;
 398     int rv;
 399     BVT(clib_bihash_kv) kv, value;
 400     u64 fib;
 401
 402     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 403     len = vec_len (table->prefix_lengths_in_search_order);
 404
 405     kv.key[0] = dst->as_u64[0];
 406     kv.key[1] = dst->as_u64[1];
 407     fib = ((u64)((fib_index))<<32);
 408
 409     for (i = 0; i < len; i++)
 410     {
 411         int dst_address_length = table->prefix_lengths_in_search_order[i];
 412         ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
 413
 414         ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
 415         //As lengths are decreasing, masks are increasingly specific.
 416         kv.key[0] &= mask->as_u64[0];
 417         kv.key[1] &= mask->as_u64[1];
 418         kv.key[2] = fib | dst_address_length;
 419
 420         rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
 421         if (rv == 0)
 422             return value.value;
 423     }
 424
 425     /* default route is always present */
 426     ASSERT(0);
 427     return 0;
 428 }
 429
 430 u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
 431                                                u32 sw_if_index,
 432                                                const ip6_address_t * dst)
 433 {
 434     u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
 435     return ip6_fib_table_fwding_lookup(im, fib_index, dst);
 436 }
 437
 438 flow_hash_config_t
 439 ip6_fib_table_get_flow_hash_config (u32 fib_index)
 440 {
 441     return (ip6_fib_get(fib_index)->flow_hash_config);
 442 }
 443
 444 u32
 445 ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
 446 {
 447     if (sw_if_index >= vec_len(ip6_main.fib_index_by_sw_if_index))
 448     {
 449         /*
 450          * This is the case for interfaces that are not yet mapped to
 451          * a IP table
 452          */
 453         return (~0);
 454     }
 455     return (ip6_main.fib_index_by_sw_if_index[sw_if_index]);
 456 }
 457
 458 void
 459 ip6_fib_table_fwding_dpo_update (u32 fib_index,
 460                                  const ip6_address_t *addr,
 461                                  u32 len,
 462                                  const dpo_id_t *dpo)
 463 {
 464     ip6_fib_table_instance_t *table;
 465     BVT(clib_bihash_kv) kv;
 466     ip6_address_t *mask;
 467     u64 fib;
 468
 469     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 470     mask = &ip6_main.fib_masks[len];
 471     fib = ((u64)((fib_index))<<32);
 472
 473     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 474     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 475     kv.key[2] = fib | len;
 476     kv.value = dpo->dpoi_index;
 477
 478     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 1);
 479
 480     table->dst_address_length_refcounts[len]++;
 481
 482     table->non_empty_dst_address_length_bitmap =
 483         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 484                          128 - len, 1);
 485     compute_prefix_lengths_in_search_order (table);
 486 }
 487
 488 void
 489 ip6_fib_table_fwding_dpo_remove (u32 fib_index,
 490                                  const ip6_address_t *addr,
 491                                  u32 len,
 492                                  const dpo_id_t *dpo)
 493 {
 494     ip6_fib_table_instance_t *table;
 495     BVT(clib_bihash_kv) kv;
 496     ip6_address_t *mask;
 497     u64 fib;
 498
 499     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 500     mask = &ip6_main.fib_masks[len];
 501     fib = ((u64)((fib_index))<<32);
 502
 503     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 504     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 505     kv.key[2] = fib | len;
 506     kv.value = dpo->dpoi_index;
 507
 508     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 0);
 509
 510     /* refcount accounting */
 511     ASSERT (table->dst_address_length_refcounts[len] > 0);
 512     if (--table->dst_address_length_refcounts[len] == 0)
 513     {
 514         table->non_empty_dst_address_length_bitmap =
 515             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 516                              128 - len, 0);
 517         compute_prefix_lengths_in_search_order (table);
 518     }
 519 }
 520
 521 typedef struct ip6_fib_show_ctx_t_ {
 522     u32 fib_index;
 523     fib_node_index_t *entries;
 524 } ip6_fib_show_ctx_t;
 525
 526 static void
 527 ip6_fib_table_collect_entries (clib_bihash_kv_24_8_t * kvp,
 528                                void *arg)
 529 {
 530     ip6_fib_show_ctx_t *ctx = arg;
 531
 532     if ((kvp->key[2] >> 32) == ctx->fib_index)
 533     {
 534         vec_add1(ctx->entries, kvp->value);
 535     }
 536 }
 537
 538 static void
 539 ip6_fib_table_show_all (ip6_fib_t *fib,
 540                         vlib_main_t * vm)
 541 {
 542     fib_node_index_t *fib_entry_index;
 543     ip6_fib_show_ctx_t ctx = {
 544         .fib_index = fib->index,
 545         .entries = NULL,
 546     };
 547     ip6_main_t *im = &ip6_main;
 548
 549     BV(clib_bihash_foreach_key_value_pair)(&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 550                                            ip6_fib_table_collect_entries,
 551                                            &ctx);
 552
 553     vec_sort_with_function(ctx.entries, fib_entry_cmp_for_sort);
 554
 555     vec_foreach(fib_entry_index, ctx.entries)
 556     {
 557         vlib_cli_output(vm, "%U",
 558                         format_fib_entry,
 559                         *fib_entry_index,
 560                         FIB_ENTRY_FORMAT_BRIEF);
 561     }
 562
 563     vec_free(ctx.entries);
 564 }
 565
 566 static void
 567 ip6_fib_table_show_one (ip6_fib_t *fib,
 568                         vlib_main_t * vm,
 569                         ip6_address_t *address,
 570                         u32 mask_len)
 571 {
 572     vlib_cli_output(vm, "%U",
 573                     format_fib_entry,
 574                     ip6_fib_table_lookup(fib->index, address, mask_len),
 575                     FIB_ENTRY_FORMAT_DETAIL);
 576 }
 577
 578 typedef struct {
 579   u32 fib_index;
 580   u64 count_by_prefix_length[129];
 581 } count_routes_in_fib_at_prefix_length_arg_t;
 582
 583 static void count_routes_in_fib_at_prefix_length
 584 (BVT(clib_bihash_kv) * kvp, void *arg)
 585 {
 586   count_routes_in_fib_at_prefix_length_arg_t * ap = arg;
 587   int mask_width;
 588
 589   if ((kvp->key[2]>>32) != ap->fib_index)
 590     return;
 591
 592   mask_width = kvp->key[2] & 0xFF;
 593
 594   ap->count_by_prefix_length[mask_width]++;
 595 }
 596
 597 static clib_error_t *
 598 ip6_show_fib (vlib_main_t * vm,
 599               unformat_input_t * input,
 600               vlib_cli_command_t * cmd)
 601 {
 602     count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
 603     ip6_main_t * im6 = &ip6_main;
 604     fib_table_t *fib_table;
 605     ip6_fib_t * fib;
 606     int verbose, matching;
 607     ip6_address_t matching_address;
 608     u32 mask_len  = 128;
 609     int table_id = -1, fib_index = ~0;
 610
 611     verbose = 1;
 612     matching = 0;
 613
 614     while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 615     {
 616         if (unformat (input, "brief")   ||
 617             unformat (input, "summary") ||
 618             unformat (input, "sum"))
 619             verbose = 0;
 620
 621         else if (unformat (input, "%U/%d",
 622                            unformat_ip6_address, &matching_address, &mask_len))
 623             matching = 1;
 624
 625         else if (unformat (input, "%U", unformat_ip6_address, &matching_address))
 626             matching = 1;
 627
 628         else if (unformat (input, "table %d", &table_id))
 629             ;
 630         else if (unformat (input, "index %d", &fib_index))
 631             ;
 632         else
 633             break;
 634     }
 635
 636     pool_foreach (fib_table, im6->fibs,
 637     ({
 638         fib = &(fib_table->v6);
 639         if (table_id >= 0 && table_id != (int)fib->table_id)
 640             continue;
 641         if (fib_index != ~0 && fib_index != (int)fib->index)
 642             continue;
 643
 644         vlib_cli_output (vm, "%s, fib_index %d, flow hash: %U",
 645                          fib_table->ft_desc, fib->index,
 646                          format_ip_flow_hash_config, fib->flow_hash_config);
 647
 648         /* Show summary? */
 649         if (! verbose)
 650         {
 651             BVT(clib_bihash) * h = &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
 652             int len;
 653
 654             vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
 655
 656             memset (ca, 0, sizeof(*ca));
 657             ca->fib_index = fib->index;
 658
 659             BV(clib_bihash_foreach_key_value_pair)
 660                 (h, count_routes_in_fib_at_prefix_length, ca);
 661
 662             for (len = 128; len >= 0; len--)
 663             {
 664                 if (ca->count_by_prefix_length[len])
 665                     vlib_cli_output (vm, "%=20d%=16lld",
 666                                      len, ca->count_by_prefix_length[len]);
 667             }
 668             continue;
 669         }
 670
 671         if (!matching)
 672         {
 673             ip6_fib_table_show_all(fib, vm);
 674         }
 675         else
 676         {
 677             ip6_fib_table_show_one(fib, vm, &matching_address, mask_len);
 678         }
 679     }));
 680
 681     return 0;
 682 }
 683
 684 /*?
 685  * This command displays the IPv6 FIB Tables (VRF Tables) and the route
 686  * entries for each table.
 687  *
 688  * @note This command will run for a long time when the FIB tables are
 689  * comprised of millions of entries. For those senarios, consider displaying
 690  * in summary mode.
 691  *
 692  * @cliexpar
 693  * @parblock
 694  * Example of how to display all the IPv6 FIB tables:
 695  * @cliexstart{show ip6 fib}
 696  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 697  * @::/0
 698  *   unicast-ip6-chain
 699  *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
 700  *     [0] [@0]: dpo-drop ip6
 701  * fe80::/10
 702  *   unicast-ip6-chain
 703  *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
 704  *     [0] [@2]: dpo-receive
 705  * ff02::1/128
 706  *   unicast-ip6-chain
 707  *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
 708  *     [0] [@2]: dpo-receive
 709  * ff02::2/128
 710  *   unicast-ip6-chain
 711  *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
 712  *     [0] [@2]: dpo-receive
 713  * ff02::16/128
 714  *   unicast-ip6-chain
 715  *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
 716  *     [0] [@2]: dpo-receive
 717  * ff02::1:ff00:0/104
 718  *   unicast-ip6-chain
 719  *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
 720  *     [0] [@2]: dpo-receive
 721  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 722  * @::/0
 723  *   unicast-ip6-chain
 724  *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 725  *     [0] [@0]: dpo-drop ip6
 726  * @::a:1:1:0:4/126
 727  *   unicast-ip6-chain
 728  *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
 729  *     [0] [@4]: ipv6-glean: af_packet0
 730  * @::a:1:1:0:7/128
 731  *   unicast-ip6-chain
 732  *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
 733  *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
 734  * fe80::/10
 735  *   unicast-ip6-chain
 736  *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
 737  *     [0] [@2]: dpo-receive
 738  * fe80::fe:3eff:fe3e:9222/128
 739  *   unicast-ip6-chain
 740  *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
 741  *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
 742  * ff02::1/128
 743  *   unicast-ip6-chain
 744  *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
 745  *     [0] [@2]: dpo-receive
 746  * ff02::2/128
 747  *   unicast-ip6-chain
 748  *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
 749  *     [0] [@2]: dpo-receive
 750  * ff02::16/128
 751  *   unicast-ip6-chain
 752  *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
 753  *     [0] [@2]: dpo-receive
 754  * ff02::1:ff00:0/104
 755  *   unicast-ip6-chain
 756  *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
 757  *     [0] [@2]: dpo-receive
 758  * @cliexend
 759  *
 760  * Example of how to display a summary of all IPv6 FIB tables:
 761  * @cliexstart{show ip6 fib summary}
 762  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 763  *     Prefix length         Count
 764  *          128                3
 765  *          104                1
 766  *          10                 1
 767  *           0                 1
 768  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 769  *     Prefix length         Count
 770  *          128                5
 771  *          126                1
 772  *          104                1
 773  *          10                 1
 774  *           0                 1
 775  * @cliexend
 776  * @endparblock
 777  ?*/
 778 /* *INDENT-OFF* */
 779 VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
 780     .path = "show ip6 fib",
 781     .short_help = "show ip6 fib [summary] [table <table-id>] [index <fib-id>] [<ip6-addr>[/<width>]]",
 782     .function = ip6_show_fib,
 783 };
 784 /* *INDENT-ON* */