src/vnet/fib/ip4_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/fib_table.h>
  17 #include <vnet/fib/fib_entry.h>
  18 #include <vnet/fib/ip4_fib.h>
  19
  20 /*
  21  * A table of prefixes to be added to tables and the sources for them
  22  */
  23 typedef struct ip4_fib_table_special_prefix_t_ {
  24     fib_prefix_t ift_prefix;
  25     fib_source_t ift_source;
  26     fib_entry_flag_t ift_flag;
  27 } ip4_fib_table_special_prefix_t;
  28
  29 static const ip4_fib_table_special_prefix_t ip4_specials[] = {
  30     {
  31         /* 0.0.0.0/0*/
  32         .ift_prefix = {
  33             .fp_addr = {
  34                 .ip4.data_u32 = 0,
  35             },
  36             .fp_len  = 0,
  37             .fp_proto = FIB_PROTOCOL_IP4,
  38         },
  39         .ift_source = FIB_SOURCE_DEFAULT_ROUTE,
  40         .ift_flag   = FIB_ENTRY_FLAG_DROP,
  41     },
  42     {
  43         /* 0.0.0.0/32*/
  44         .ift_prefix = {
  45             .fp_addr = {
  46                 .ip4.data_u32 = 0,
  47             },
  48             .fp_len  = 32,
  49             .fp_proto = FIB_PROTOCOL_IP4,
  50         },
  51         .ift_source = FIB_SOURCE_DEFAULT_ROUTE,
  52         .ift_flag   = FIB_ENTRY_FLAG_DROP,
  53     },
  54     {
  55         /*
  56          * 240.0.0.0/4
  57          * drop class E
  58          */
  59         .ift_prefix = {
  60             .fp_addr = {
  61                 .ip4.data_u32 = 0xf0000000,
  62             },
  63             .fp_len   = 4,
  64             .fp_proto = FIB_PROTOCOL_IP4,
  65         },
  66         .ift_source = FIB_SOURCE_SPECIAL,
  67         .ift_flag   = FIB_ENTRY_FLAG_DROP,
  68
  69     },
  70     {
  71         /*
  72          * 224.0.0.0/4
  73          * drop all mcast
  74          */
  75         .ift_prefix = {
  76             .fp_addr = {
  77                 .ip4.data_u32 = 0xe0000000,
  78             },
  79             .fp_len   = 4,
  80             .fp_proto = FIB_PROTOCOL_IP4,
  81         },
  82         .ift_source = FIB_SOURCE_SPECIAL,
  83         .ift_flag    = FIB_ENTRY_FLAG_DROP,
  84     },
  85     {
  86         /*
  87          * 255.255.255.255/32
  88          * drop, but we'll allow it to be usurped by the likes of DHCP
  89          */
  90         .ift_prefix = {
  91             .fp_addr = {
  92                 .ip4.data_u32 = 0xffffffff,
  93             },
  94             .fp_len   = 32,
  95             .fp_proto = FIB_PROTOCOL_IP4,
  96         },
  97         .ift_source = FIB_SOURCE_DEFAULT_ROUTE,
  98         .ift_flag   = FIB_ENTRY_FLAG_DROP,
  99     }
 100 };
 101
 102
 103 static u32
 104 ip4_create_fib_with_table_id (u32 table_id,
 105                               fib_source_t src)
 106 {
 107     fib_table_t *fib_table;
 108     ip4_fib_t *v4_fib;
 109     void *old_heap;
 110
 111     pool_get(ip4_main.fibs, fib_table);
 112     clib_memset(fib_table, 0, sizeof(*fib_table));
 113
 114     old_heap = clib_mem_set_heap (ip4_main.mtrie_mheap);
 115     pool_get_aligned(ip4_main.v4_fibs, v4_fib, CLIB_CACHE_LINE_BYTES);
 116     clib_mem_set_heap (old_heap);
 117
 118     ASSERT((fib_table - ip4_main.fibs) ==
 119            (v4_fib - ip4_main.v4_fibs));
 120
 121     fib_table->ft_proto = FIB_PROTOCOL_IP4;
 122     fib_table->ft_index =
 123         v4_fib->index =
 124             (fib_table - ip4_main.fibs);
 125
 126     hash_set (ip4_main.fib_index_by_table_id, table_id, fib_table->ft_index);
 127
 128     fib_table->ft_table_id =
 129         v4_fib->table_id =
 130             table_id;
 131     fib_table->ft_flow_hash_config = IP_FLOW_HASH_DEFAULT;
 132
 133     fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP4, src);
 134
 135     ip4_mtrie_init(&v4_fib->mtrie);
 136
 137     /*
 138      * add the special entries into the new FIB
 139      */
 140     int ii;
 141
 142     for (ii = 0; ii < ARRAY_LEN(ip4_specials); ii++)
 143     {
 144         fib_prefix_t prefix = ip4_specials[ii].ift_prefix;
 145
 146         prefix.fp_addr.ip4.data_u32 =
 147             clib_host_to_net_u32(prefix.fp_addr.ip4.data_u32);
 148
 149         fib_table_entry_special_add(fib_table->ft_index,
 150                                     &prefix,
 151                                     ip4_specials[ii].ift_source,
 152                                     ip4_specials[ii].ift_flag);
 153     }
 154
 155     return (fib_table->ft_index);
 156 }
 157
 158 void
 159 ip4_fib_table_destroy (u32 fib_index)
 160 {
 161     fib_table_t *fib_table = pool_elt_at_index(ip4_main.fibs, fib_index);
 162     ip4_fib_t *v4_fib = pool_elt_at_index(ip4_main.v4_fibs, fib_index);
 163     u32 *n_locks;
 164     int ii;
 165
 166     /*
 167      * remove all the specials we added when the table was created.
 168      * In reverse order so the default route is last.
 169      */
 170     for (ii = ARRAY_LEN(ip4_specials) - 1; ii >= 0; ii--)
 171     {
 172         fib_prefix_t prefix = ip4_specials[ii].ift_prefix;
 173
 174         prefix.fp_addr.ip4.data_u32 =
 175             clib_host_to_net_u32(prefix.fp_addr.ip4.data_u32);
 176
 177         fib_table_entry_special_remove(fib_table->ft_index,
 178                                        &prefix,
 179                                        ip4_specials[ii].ift_source);
 180     }
 181
 182     /*
 183      * validate no more routes.
 184      */
 185 #ifdef CLIB_DEBUG
 186     if (0 != fib_table->ft_total_route_counts)
 187         fib_table_assert_empty(fib_table);
 188 #endif
 189
 190     vec_foreach(n_locks, fib_table->ft_src_route_counts)
 191     {
 192         ASSERT(0 == *n_locks);
 193     }
 194
 195     if (~0 != fib_table->ft_table_id)
 196     {
 197         hash_unset (ip4_main.fib_index_by_table_id, fib_table->ft_table_id);
 198     }
 199
 200     vec_free(fib_table->ft_src_route_counts);
 201     ip4_mtrie_free(&v4_fib->mtrie);
 202
 203     pool_put(ip4_main.v4_fibs, v4_fib);
 204     pool_put(ip4_main.fibs, fib_table);
 205 }
 206
 207
 208 u32
 209 ip4_fib_table_find_or_create_and_lock (u32 table_id,
 210                                        fib_source_t src)
 211 {
 212     u32 index;
 213
 214     index = ip4_fib_index_from_table_id(table_id);
 215     if (~0 == index)
 216         return ip4_create_fib_with_table_id(table_id, src);
 217
 218     fib_table_lock(index, FIB_PROTOCOL_IP4, src);
 219
 220     return (index);
 221 }
 222
 223 u32
 224 ip4_fib_table_create_and_lock (fib_source_t src)
 225 {
 226     return (ip4_create_fib_with_table_id(~0, src));
 227 }
 228
 229 u32
 230 ip4_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
 231 {
 232     if (sw_if_index >= vec_len(ip4_main.fib_index_by_sw_if_index))
 233     {
 234         /*
 235          * This is the case for interfaces that are not yet mapped to
 236          * a IP table
 237          */
 238         return (~0);
 239     }
 240     return (ip4_main.fib_index_by_sw_if_index[sw_if_index]);
 241 }
 242
 243 /*
 244  * ip4_fib_table_lookup_exact_match
 245  *
 246  * Exact match prefix lookup
 247  */
 248 fib_node_index_t
 249 ip4_fib_table_lookup_exact_match (const ip4_fib_t *fib,
 250                                   const ip4_address_t *addr,
 251                                   u32 len)
 252 {
 253     uword * hash, * result;
 254     u32 key;
 255
 256     hash = fib->fib_entry_by_dst_address[len];
 257     key  = (addr->data_u32 & ip4_main.fib_masks[len]);
 258
 259     result = hash_get(hash, key);
 260
 261     if (NULL != result) {
 262         return (result[0]);
 263     }
 264     return (FIB_NODE_INDEX_INVALID);
 265 }
 266
 267 /*
 268  * ip4_fib_table_lookup_adj
 269  *
 270  * Longest prefix match
 271  */
 272 index_t
 273 ip4_fib_table_lookup_lb (ip4_fib_t *fib,
 274                          const ip4_address_t *addr)
 275 {
 276     fib_node_index_t fei;
 277
 278     fei = ip4_fib_table_lookup(fib, addr, 32);
 279
 280     if (FIB_NODE_INDEX_INVALID != fei)
 281     {
 282         const dpo_id_t *dpo;
 283
 284         dpo = fib_entry_contribute_ip_forwarding(fei);
 285
 286         return (dpo->dpoi_index);
 287     }
 288     return (INDEX_INVALID);
 289 }
 290
 291 /*
 292  * ip4_fib_table_lookup
 293  *
 294  * Longest prefix match
 295  */
 296 fib_node_index_t
 297 ip4_fib_table_lookup (const ip4_fib_t *fib,
 298                       const ip4_address_t *addr,
 299                       u32 len)
 300 {
 301     uword * hash, * result;
 302     i32 mask_len;
 303     u32 key;
 304
 305     for (mask_len = len; mask_len >= 0; mask_len--)
 306     {
 307         hash = fib->fib_entry_by_dst_address[mask_len];
 308         key = (addr->data_u32 & ip4_main.fib_masks[mask_len]);
 309
 310         result = hash_get (hash, key);
 311
 312         if (NULL != result) {
 313             return (result[0]);
 314         }
 315     }
 316     return (FIB_NODE_INDEX_INVALID);
 317 }
 318
 319 void
 320 ip4_fib_table_entry_insert (ip4_fib_t *fib,
 321                             const ip4_address_t *addr,
 322                             u32 len,
 323                             fib_node_index_t fib_entry_index)
 324 {
 325     uword * hash, * result;
 326     u32 key;
 327
 328     key = (addr->data_u32 & ip4_main.fib_masks[len]);
 329     hash = fib->fib_entry_by_dst_address[len];
 330     result = hash_get (hash, key);
 331
 332     if (NULL == result) {
 333         /*
 334          * adding a new entry
 335          */
 336         uword *old_heap;
 337         old_heap = clib_mem_set_heap (ip4_main.mtrie_mheap);
 338
 339         if (NULL == hash) {
 340             hash = hash_create (32 /* elts */, sizeof (uword));
 341             hash_set_flags (hash, HASH_FLAG_NO_AUTO_SHRINK);
 342
 343         }
 344         hash = hash_set(hash, key, fib_entry_index);
 345         fib->fib_entry_by_dst_address[len] = hash;
 346         clib_mem_set_heap (old_heap);
 347     }
 348     else
 349     {
 350         ASSERT(0);
 351     }
 352 }
 353
 354 void
 355 ip4_fib_table_entry_remove (ip4_fib_t *fib,
 356                             const ip4_address_t *addr,
 357                             u32 len)
 358 {
 359     uword * hash, * result;
 360     u32 key;
 361
 362     key = (addr->data_u32 & ip4_main.fib_masks[len]);
 363     hash = fib->fib_entry_by_dst_address[len];
 364     result = hash_get (hash, key);
 365
 366     if (NULL == result)
 367     {
 368         /*
 369          * removing a non-existent entry. i'll allow it.
 370          */
 371     }
 372     else
 373     {
 374         uword *old_heap;
 375
 376         old_heap = clib_mem_set_heap (ip4_main.mtrie_mheap);
 377         hash_unset(hash, key);
 378         clib_mem_set_heap (old_heap);
 379     }
 380
 381     fib->fib_entry_by_dst_address[len] = hash;
 382 }
 383
 384 void
 385 ip4_fib_table_fwding_dpo_update (ip4_fib_t *fib,
 386                                  const ip4_address_t *addr,
 387                                  u32 len,
 388                                  const dpo_id_t *dpo)
 389 {
 390     ip4_fib_mtrie_route_add(&fib->mtrie, addr, len, dpo->dpoi_index);
 391 }
 392
 393 void
 394 ip4_fib_table_fwding_dpo_remove (ip4_fib_t *fib,
 395                                  const ip4_address_t *addr,
 396                                  u32 len,
 397                                  const dpo_id_t *dpo,
 398                                  u32 cover_index)
 399 {
 400     const fib_prefix_t *cover_prefix;
 401     const dpo_id_t *cover_dpo;
 402
 403     /*
 404      * We need to pass the MTRIE the LB index and address length of the
 405      * covering prefix, so it can fill the plys with the correct replacement
 406      * for the entry being removed
 407      */
 408     cover_prefix = fib_entry_get_prefix(cover_index);
 409     cover_dpo = fib_entry_contribute_ip_forwarding(cover_index);
 410
 411     ip4_fib_mtrie_route_del(&fib->mtrie,
 412                             addr, len, dpo->dpoi_index,
 413                             cover_prefix->fp_len,
 414                             cover_dpo->dpoi_index);
 415 }
 416
 417 void
 418 ip4_fib_table_walk (ip4_fib_t *fib,
 419                     fib_table_walk_fn_t fn,
 420                     void *ctx)
 421 {
 422     fib_prefix_t root = {
 423         .fp_proto = FIB_PROTOCOL_IP4,
 424         // address and length default to all 0
 425     };
 426
 427     /*
 428      * A full tree walk is the dengenerate case of a sub-tree from
 429      * the very root
 430      */
 431     return (ip4_fib_table_sub_tree_walk(fib, &root, fn, ctx));
 432 }
 433
 434 void
 435 ip4_fib_table_sub_tree_walk (ip4_fib_t *fib,
 436                              const fib_prefix_t *root,
 437                              fib_table_walk_fn_t fn,
 438                              void *ctx)
 439 {
 440     fib_prefix_t *sub_trees = NULL;
 441     int i;
 442
 443     /*
 444      * There is no efficient way to walk this array of hash tables.
 445      * so we walk each table with a mask length greater than and equal to
 446      * the required root and check it is covered by the root.
 447      */
 448     for (i = root->fp_len;
 449          i < ARRAY_LEN (fib->fib_entry_by_dst_address);
 450          i++)
 451     {
 452         uword * hash = fib->fib_entry_by_dst_address[i];
 453
 454         if (NULL != hash)
 455         {
 456             ip4_address_t key;
 457             hash_pair_t * p;
 458
 459             hash_foreach_pair (p, hash,
 460             ({
 461                 key.as_u32 = p->key;
 462                 if (ip4_destination_matches_route(&ip4_main,
 463                                                   &key,
 464                                                   &root->fp_addr.ip4,
 465                                                   root->fp_len))
 466                 {
 467                     const fib_prefix_t *sub_tree;
 468                     int skip = 0;
 469
 470                     /*
 471                      * exclude sub-trees the walk does not want to explore
 472                      */
 473                     vec_foreach(sub_tree, sub_trees)
 474                     {
 475                         if (ip4_destination_matches_route(&ip4_main,
 476                                                           &key,
 477                                                           &sub_tree->fp_addr.ip4,
 478                                                           sub_tree->fp_len))
 479                         {
 480                             skip = 1;
 481                             break;
 482                         }
 483                     }
 484
 485                     if (!skip)
 486                     {
 487                         switch (fn(p->value[0], ctx))
 488                         {
 489                         case FIB_TABLE_WALK_CONTINUE:
 490                             break;
 491                         case FIB_TABLE_WALK_SUB_TREE_STOP: {
 492                             fib_prefix_t pfx = {
 493                                 .fp_proto = FIB_PROTOCOL_IP4,
 494                                 .fp_len = i,
 495                                 .fp_addr.ip4 = key,
 496                             };
 497                             vec_add1(sub_trees, pfx);
 498                             break;
 499                         }
 500                         case FIB_TABLE_WALK_STOP:
 501                             goto done;
 502                         }
 503                     }
 504                 }
 505             }));
 506         }
 507     }
 508 done:
 509     vec_free(sub_trees);
 510     return;
 511 }
 512
 513 /**
 514  * Walk show context
 515  */
 516 typedef struct ip4_fib_show_walk_ctx_t_
 517 {
 518     fib_node_index_t *ifsw_indicies;
 519 } ip4_fib_show_walk_ctx_t;
 520
 521 static fib_table_walk_rc_t
 522 ip4_fib_show_walk_cb (fib_node_index_t fib_entry_index,
 523                       void *arg)
 524 {
 525     ip4_fib_show_walk_ctx_t *ctx = arg;
 526
 527     vec_add1(ctx->ifsw_indicies, fib_entry_index);
 528
 529     return (FIB_TABLE_WALK_CONTINUE);
 530 }
 531
 532 static void
 533 ip4_fib_table_show_all (ip4_fib_t *fib,
 534                         vlib_main_t * vm)
 535 {
 536     ip4_fib_show_walk_ctx_t ctx = {
 537         .ifsw_indicies = NULL,
 538     };
 539     fib_node_index_t *fib_entry_index;
 540
 541     ip4_fib_table_walk(fib, ip4_fib_show_walk_cb, &ctx);
 542     vec_sort_with_function(ctx.ifsw_indicies,
 543                            fib_entry_cmp_for_sort);
 544
 545     vec_foreach(fib_entry_index, ctx.ifsw_indicies)
 546     {
 547         vlib_cli_output(vm, "%U",
 548                         format_fib_entry,
 549                         *fib_entry_index,
 550                         FIB_ENTRY_FORMAT_BRIEF);
 551     }
 552
 553     vec_free(ctx.ifsw_indicies);
 554 }
 555
 556 static void
 557 ip4_fib_table_show_one (ip4_fib_t *fib,
 558                         vlib_main_t * vm,
 559                         ip4_address_t *address,
 560                         u32 mask_len,
 561                         int detail)
 562 {
 563     vlib_cli_output(vm, "%U",
 564                     format_fib_entry,
 565                     ip4_fib_table_lookup(fib, address, mask_len),
 566                     (detail ?
 567                      FIB_ENTRY_FORMAT_DETAIL2 :
 568                      FIB_ENTRY_FORMAT_DETAIL));
 569 }
 570
 571 u8 *
 572 format_ip4_fib_table_memory (u8 * s, va_list * args)
 573 {
 574 #if USE_DLMALLOC == 0
 575     s = format(s, "%=30s %=6d %=12ld\n",
 576                "IPv4 unicast",
 577                pool_elts(ip4_main.fibs),
 578                mheap_bytes(ip4_main.mtrie_mheap));
 579 #else
 580     s = format(s, "%=30s %=6d %=12ld\n",
 581                "IPv4 unicast",
 582                pool_elts(ip4_main.fibs),
 583                mspace_footprint(ip4_main.mtrie_mheap));
 584 #endif
 585
 586
 587     return (s);
 588 }
 589
 590 static clib_error_t *
 591 ip4_show_fib (vlib_main_t * vm,
 592               unformat_input_t * input,
 593               vlib_cli_command_t * cmd)
 594 {
 595     ip4_main_t * im4 = &ip4_main;
 596     fib_table_t * fib_table;
 597     u64 total_mtrie_memory, total_hash_memory;
 598     int verbose, matching, mtrie, memory;
 599     ip4_address_t matching_address;
 600     u32 matching_mask = 32;
 601     int i, table_id = -1, fib_index = ~0;
 602     int detail = 0;
 603
 604     verbose = 1;
 605     matching = mtrie = memory = 0;
 606     total_hash_memory = total_mtrie_memory = 0;
 607
 608     while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 609     {
 610         if (unformat (input, "brief") || unformat (input, "summary")
 611             || unformat (input, "sum"))
 612             verbose = 0;
 613
 614         else if (unformat (input, "detail") || unformat (input, "det"))
 615             detail = 1;
 616
 617         else if (unformat (input, "mtrie"))
 618             mtrie = 1;
 619
 620         else if (unformat (input, "mem") ||
 621                  unformat (input, "memory"))
 622             memory = 1;
 623
 624         else if (unformat (input, "%U/%d",
 625                            unformat_ip4_address, &matching_address, &matching_mask))
 626             matching = 1;
 627
 628         else if (unformat (input, "%U", unformat_ip4_address, &matching_address))
 629             matching = 1;
 630
 631         else if (unformat (input, "table %d", &table_id))
 632             ;
 633         else if (unformat (input, "index %d", &fib_index))
 634             ;
 635         else
 636             break;
 637     }
 638
 639     pool_foreach (fib_table, im4->fibs,
 640     ({
 641         ip4_fib_t *fib = pool_elt_at_index(im4->v4_fibs, fib_table->ft_index);
 642         fib_source_t source;
 643         u8 *s = NULL;
 644
 645         if (table_id >= 0 && table_id != (int)fib->table_id)
 646             continue;
 647         if (fib_index != ~0 && fib_index != (int)fib->index)
 648             continue;
 649
 650         if (memory)
 651         {
 652             uword mtrie_size, hash_size, *old_heap;
 653
 654
 655             mtrie_size = ip4_fib_mtrie_memory_usage(&fib->mtrie);
 656             hash_size = 0;
 657
 658             old_heap = clib_mem_set_heap (ip4_main.mtrie_mheap);
 659             for (i = 0; i < ARRAY_LEN (fib->fib_entry_by_dst_address); i++)
 660             {
 661                 uword * hash = fib->fib_entry_by_dst_address[i];
 662                 if (NULL != hash)
 663                 {
 664                     hash_size += hash_bytes(hash);
 665                 }
 666             }
 667             clib_mem_set_heap (old_heap);
 668
 669             if (verbose)
 670                 vlib_cli_output (vm, "%U mtrie:%d hash:%d",
 671                                  format_fib_table_name, fib->index,
 672                                  FIB_PROTOCOL_IP4,
 673                                  mtrie_size,
 674                                  hash_size);
 675             total_mtrie_memory += mtrie_size;
 676             total_hash_memory += hash_size;
 677             continue;
 678         }
 679
 680         s = format(s, "%U, fib_index:%d, flow hash:[%U] epoch:%d flags:%U locks:[",
 681                    format_fib_table_name, fib->index,
 682                    FIB_PROTOCOL_IP4,
 683                    fib->index,
 684                    format_ip_flow_hash_config,
 685                    fib_table->ft_flow_hash_config,
 686                    fib_table->ft_epoch,
 687                    format_fib_table_flags, fib_table->ft_flags);
 688         vec_foreach_index(source, fib_table->ft_locks)
 689         {
 690             if (0 != fib_table->ft_locks[source])
 691             {
 692                 s = format(s, "%U:%d, ",
 693                            format_fib_source, source,
 694                            fib_table->ft_locks[source]);
 695             }
 696         }
 697         s = format (s, "]");
 698         vlib_cli_output (vm, "%v", s);
 699         vec_free(s);
 700
 701         /* Show summary? */
 702         if (mtrie)
 703         {
 704             vlib_cli_output (vm, "%U", format_ip4_fib_mtrie, &fib->mtrie, verbose);
 705             continue;
 706         }
 707         if (! verbose)
 708         {
 709             vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
 710             for (i = 0; i < ARRAY_LEN (fib->fib_entry_by_dst_address); i++)
 711             {
 712                 uword * hash = fib->fib_entry_by_dst_address[i];
 713                 uword n_elts = hash_elts (hash);
 714                 if (n_elts > 0)
 715                     vlib_cli_output (vm, "%20d%16d", i, n_elts);
 716             }
 717             continue;
 718         }
 719
 720         if (!matching)
 721         {
 722             ip4_fib_table_show_all(fib, vm);
 723         }
 724         else
 725         {
 726             ip4_fib_table_show_one(fib, vm, &matching_address,
 727                                    matching_mask, detail);
 728         }
 729     }));
 730
 731     if (memory)
 732     {
 733         vlib_cli_output (vm, "totals: mtrie:%ld hash:%ld all:%ld",
 734                          total_mtrie_memory,
 735                          total_hash_memory,
 736                          total_mtrie_memory + total_hash_memory);
 737         vlib_cli_output (vm, "\nMtrie Mheap Usage: %U\n",
 738                          format_mheap, ip4_main.mtrie_mheap, 1);
 739     }
 740     return 0;
 741 }
 742
 743 /*?
 744  * This command displays the IPv4 FIB Tables (VRF Tables) and the route
 745  * entries for each table.
 746  *
 747  * @note This command will run for a long time when the FIB tables are
 748  * comprised of millions of entries. For those senarios, consider displaying
 749  * a single table or summary mode.
 750  *
 751  * @cliexpar
 752  * Example of how to display all the IPv4 FIB tables:
 753  * @cliexstart{show ip fib}
 754  * ipv4-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 755  * 0.0.0.0/0
 756  *   unicast-ip4-chain
 757  *   [@0]: dpo-load-balance: [index:0 buckets:1 uRPF:0 to:[0:0]]
 758  *     [0] [@0]: dpo-drop ip6
 759  * 0.0.0.0/32
 760  *   unicast-ip4-chain
 761  *   [@0]: dpo-load-balance: [index:1 buckets:1 uRPF:1 to:[0:0]]
 762  *     [0] [@0]: dpo-drop ip6
 763  * 6.0.1.2/32
 764  *   unicast-ip4-chain
 765  *   [@0]: dpo-load-balance: [index:30 buckets:1 uRPF:29 to:[0:0]]
 766  *     [0] [@3]: arp-ipv4: via 6.0.0.1 af_packet0
 767  * 7.0.0.1/32
 768  *   unicast-ip4-chain
 769  *   [@0]: dpo-load-balance: [index:31 buckets:4 uRPF:30 to:[0:0]]
 770  *     [0] [@3]: arp-ipv4: via 6.0.0.2 af_packet0
 771  *     [1] [@3]: arp-ipv4: via 6.0.0.2 af_packet0
 772  *     [2] [@3]: arp-ipv4: via 6.0.0.2 af_packet0
 773  *     [3] [@3]: arp-ipv4: via 6.0.0.1 af_packet0
 774  * 224.0.0.0/8
 775  *   unicast-ip4-chain
 776  *   [@0]: dpo-load-balance: [index:3 buckets:1 uRPF:3 to:[0:0]]
 777  *     [0] [@0]: dpo-drop ip6
 778  * 240.0.0.0/8
 779  *   unicast-ip4-chain
 780  *   [@0]: dpo-load-balance: [index:2 buckets:1 uRPF:2 to:[0:0]]
 781  *     [0] [@0]: dpo-drop ip6
 782  * 255.255.255.255/32
 783  *   unicast-ip4-chain
 784  *   [@0]: dpo-load-balance: [index:4 buckets:1 uRPF:4 to:[0:0]]
 785  *     [0] [@0]: dpo-drop ip6
 786  * ipv4-VRF:7, fib_index 1, flow hash: src dst sport dport proto
 787  * 0.0.0.0/0
 788  *   unicast-ip4-chain
 789  *   [@0]: dpo-load-balance: [index:12 buckets:1 uRPF:11 to:[0:0]]
 790  *     [0] [@0]: dpo-drop ip6
 791  * 0.0.0.0/32
 792  *   unicast-ip4-chain
 793  *   [@0]: dpo-load-balance: [index:13 buckets:1 uRPF:12 to:[0:0]]
 794  *     [0] [@0]: dpo-drop ip6
 795  * 172.16.1.0/24
 796  *   unicast-ip4-chain
 797  *   [@0]: dpo-load-balance: [index:17 buckets:1 uRPF:16 to:[0:0]]
 798  *     [0] [@4]: ipv4-glean: af_packet0
 799  * 172.16.1.1/32
 800  *   unicast-ip4-chain
 801  *   [@0]: dpo-load-balance: [index:18 buckets:1 uRPF:17 to:[1:84]]
 802  *     [0] [@2]: dpo-receive: 172.16.1.1 on af_packet0
 803  * 172.16.1.2/32
 804  *   unicast-ip4-chain
 805  *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 806  *     [0] [@5]: ipv4 via 172.16.1.2 af_packet0: IP4: 02:fe:9e:70:7a:2b -> 26:a5:f6:9c:3a:36
 807  * 172.16.2.0/24
 808  *   unicast-ip4-chain
 809  *   [@0]: dpo-load-balance: [index:19 buckets:1 uRPF:18 to:[0:0]]
 810  *     [0] [@4]: ipv4-glean: af_packet1
 811  * 172.16.2.1/32
 812  *   unicast-ip4-chain
 813  *   [@0]: dpo-load-balance: [index:20 buckets:1 uRPF:19 to:[0:0]]
 814  *     [0] [@2]: dpo-receive: 172.16.2.1 on af_packet1
 815  * 224.0.0.0/8
 816  *   unicast-ip4-chain
 817  *   [@0]: dpo-load-balance: [index:15 buckets:1 uRPF:14 to:[0:0]]
 818  *     [0] [@0]: dpo-drop ip6
 819  * 240.0.0.0/8
 820  *   unicast-ip4-chain
 821  *   [@0]: dpo-load-balance: [index:14 buckets:1 uRPF:13 to:[0:0]]
 822  *     [0] [@0]: dpo-drop ip6
 823  * 255.255.255.255/32
 824  *   unicast-ip4-chain
 825  *   [@0]: dpo-load-balance: [index:16 buckets:1 uRPF:15 to:[0:0]]
 826  *     [0] [@0]: dpo-drop ip6
 827  * @cliexend
 828  * Example of how to display a single IPv4 FIB table:
 829  * @cliexstart{show ip fib table 7}
 830  * ipv4-VRF:7, fib_index 1, flow hash: src dst sport dport proto
 831  * 0.0.0.0/0
 832  *   unicast-ip4-chain
 833  *   [@0]: dpo-load-balance: [index:12 buckets:1 uRPF:11 to:[0:0]]
 834  *     [0] [@0]: dpo-drop ip6
 835  * 0.0.0.0/32
 836  *   unicast-ip4-chain
 837  *   [@0]: dpo-load-balance: [index:13 buckets:1 uRPF:12 to:[0:0]]
 838  *     [0] [@0]: dpo-drop ip6
 839  * 172.16.1.0/24
 840  *   unicast-ip4-chain
 841  *   [@0]: dpo-load-balance: [index:17 buckets:1 uRPF:16 to:[0:0]]
 842  *     [0] [@4]: ipv4-glean: af_packet0
 843  * 172.16.1.1/32
 844  *   unicast-ip4-chain
 845  *   [@0]: dpo-load-balance: [index:18 buckets:1 uRPF:17 to:[1:84]]
 846  *     [0] [@2]: dpo-receive: 172.16.1.1 on af_packet0
 847  * 172.16.1.2/32
 848  *   unicast-ip4-chain
 849  *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 850  *     [0] [@5]: ipv4 via 172.16.1.2 af_packet0: IP4: 02:fe:9e:70:7a:2b -> 26:a5:f6:9c:3a:36
 851  * 172.16.2.0/24
 852  *   unicast-ip4-chain
 853  *   [@0]: dpo-load-balance: [index:19 buckets:1 uRPF:18 to:[0:0]]
 854  *     [0] [@4]: ipv4-glean: af_packet1
 855  * 172.16.2.1/32
 856  *   unicast-ip4-chain
 857  *   [@0]: dpo-load-balance: [index:20 buckets:1 uRPF:19 to:[0:0]]
 858  *     [0] [@2]: dpo-receive: 172.16.2.1 on af_packet1
 859  * 224.0.0.0/8
 860  *   unicast-ip4-chain
 861  *   [@0]: dpo-load-balance: [index:15 buckets:1 uRPF:14 to:[0:0]]
 862  *     [0] [@0]: dpo-drop ip6
 863  * 240.0.0.0/8
 864  *   unicast-ip4-chain
 865  *   [@0]: dpo-load-balance: [index:14 buckets:1 uRPF:13 to:[0:0]]
 866  *     [0] [@0]: dpo-drop ip6
 867  * 255.255.255.255/32
 868  *   unicast-ip4-chain
 869  *   [@0]: dpo-load-balance: [index:16 buckets:1 uRPF:15 to:[0:0]]
 870  *     [0] [@0]: dpo-drop ip6
 871  * @cliexend
 872  * Example of how to display a summary of all IPv4 FIB tables:
 873  * @cliexstart{show ip fib summary}
 874  * ipv4-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 875  *     Prefix length         Count
 876  *                    0               1
 877  *                    8               2
 878  *                   32               4
 879  * ipv4-VRF:7, fib_index 1, flow hash: src dst sport dport proto
 880  *     Prefix length         Count
 881  *                    0               1
 882  *                    8               2
 883  *                   24               2
 884  *                   32               4
 885  * @cliexend
 886  ?*/
 887 /* *INDENT-OFF* */
 888 VLIB_CLI_COMMAND (ip4_show_fib_command, static) = {
 889     .path = "show ip fib",
 890     .short_help = "show ip fib [summary] [table <table-id>] [index <fib-id>] [<ip4-addr>[/<mask>]] [mtrie] [detail]",
 891     .function = ip4_show_fib,
 892 };
 893 /* *INDENT-ON* */