bgpd/bgp_clist.c

   1 /* BGP community-list and extcommunity-list.
   2  * Copyright (C) 1999 Kunihiro Ishiguro
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22
  23 #include "command.h"
  24 #include "prefix.h"
  25 #include "memory.h"
  26 #include "queue.h"
  27 #include "filter.h"
  28 #include "stream.h"
  29 #include "jhash.h"
  30 #include "frrstr.h"
  31
  32 #include "bgpd/bgpd.h"
  33 #include "bgpd/bgp_community.h"
  34 #include "bgpd/bgp_ecommunity.h"
  35 #include "bgpd/bgp_lcommunity.h"
  36 #include "bgpd/bgp_community_alias.h"
  37 #include "bgpd/bgp_aspath.h"
  38 #include "bgpd/bgp_regex.h"
  39 #include "bgpd/bgp_clist.h"
  40
  41 /* Calculate new sequential number. */
  42 static int64_t bgp_clist_new_seq_get(struct community_list *list)
  43 {
  44         int64_t maxseq;
  45         int64_t newseq;
  46         struct community_entry *entry;
  47
  48         maxseq = 0;
  49
  50         for (entry = list->head; entry; entry = entry->next) {
  51                 if (maxseq < entry->seq)
  52                         maxseq = entry->seq;
  53         }
  54
  55         newseq = ((maxseq / 5) * 5) + 5;
  56
  57         return (newseq > UINT_MAX) ? UINT_MAX : newseq;
  58 }
  59
  60 /* Return community-list entry which has same seq number. */
  61 static struct community_entry *bgp_clist_seq_check(struct community_list *list,
  62                                                    int64_t seq)
  63 {
  64         struct community_entry *entry;
  65
  66         for (entry = list->head; entry; entry = entry->next)
  67                 if (entry->seq == seq)
  68                         return entry;
  69         return NULL;
  70 }
  71
  72 static uint32_t bgp_clist_hash_key_community_list(const void *data)
  73 {
  74         struct community_list *cl = (struct community_list *) data;
  75
  76         if (cl->name_hash)
  77                 return cl->name_hash;
  78
  79         cl->name_hash = bgp_clist_hash_key(cl->name);
  80         return cl->name_hash;
  81 }
  82
  83 static bool bgp_clist_hash_cmp_community_list(const void *a1, const void *a2)
  84 {
  85         const struct community_list *cl1 = a1;
  86         const struct community_list *cl2 = a2;
  87
  88         if (cl1->name_hash != cl2->name_hash)
  89                 return false;
  90
  91         if (strcmp(cl1->name, cl2->name) == 0)
  92                 return true;
  93
  94         return false;
  95 }
  96
  97 /* Lookup master structure for community-list or
  98    extcommunity-list.  */
  99 struct community_list_master *
 100 community_list_master_lookup(struct community_list_handler *ch, int master)
 101 {
 102         if (ch)
 103                 switch (master) {
 104                 case COMMUNITY_LIST_MASTER:
 105                         return &ch->community_list;
 106                 case EXTCOMMUNITY_LIST_MASTER:
 107                         return &ch->extcommunity_list;
 108                 case LARGE_COMMUNITY_LIST_MASTER:
 109                         return &ch->lcommunity_list;
 110                 }
 111         return NULL;
 112 }
 113
 114 /* Allocate a new community list entry.  */
 115 static struct community_entry *community_entry_new(void)
 116 {
 117         return XCALLOC(MTYPE_COMMUNITY_LIST_ENTRY,
 118                        sizeof(struct community_entry));
 119 }
 120
 121 /* Free community list entry.  */
 122 static void community_entry_free(struct community_entry *entry)
 123 {
 124         switch (entry->style) {
 125         case COMMUNITY_LIST_STANDARD:
 126                 if (entry->u.com)
 127                         community_free(&entry->u.com);
 128                 break;
 129         case LARGE_COMMUNITY_LIST_STANDARD:
 130                 if (entry->u.lcom)
 131                         lcommunity_free(&entry->u.lcom);
 132                 break;
 133         case EXTCOMMUNITY_LIST_STANDARD:
 134                 /* In case of standard extcommunity-list, configuration string
 135                    is made by ecommunity_ecom2str().  */
 136                 XFREE(MTYPE_ECOMMUNITY_STR, entry->config);
 137                 if (entry->u.ecom)
 138                         ecommunity_free(&entry->u.ecom);
 139                 break;
 140         case COMMUNITY_LIST_EXPANDED:
 141         case EXTCOMMUNITY_LIST_EXPANDED:
 142         case LARGE_COMMUNITY_LIST_EXPANDED:
 143                 XFREE(MTYPE_COMMUNITY_LIST_CONFIG, entry->config);
 144                 if (entry->reg)
 145                         bgp_regex_free(entry->reg);
 146         default:
 147                 break;
 148         }
 149         XFREE(MTYPE_COMMUNITY_LIST_ENTRY, entry);
 150 }
 151
 152 /* Allocate a new community-list.  */
 153 static struct community_list *community_list_new(void)
 154 {
 155         return XCALLOC(MTYPE_COMMUNITY_LIST, sizeof(struct community_list));
 156 }
 157
 158 /* Free community-list.  */
 159 static void community_list_free(struct community_list *list)
 160 {
 161         XFREE(MTYPE_COMMUNITY_LIST_NAME, list->name);
 162         XFREE(MTYPE_COMMUNITY_LIST, list);
 163 }
 164
 165 static struct community_list *
 166 community_list_insert(struct community_list_handler *ch, const char *name,
 167                       int master)
 168 {
 169         size_t i;
 170         long number;
 171         struct community_list *new;
 172         struct community_list *point;
 173         struct community_list_list *list;
 174         struct community_list_master *cm;
 175
 176         /* Lookup community-list master.  */
 177         cm = community_list_master_lookup(ch, master);
 178         if (!cm)
 179                 return NULL;
 180
 181         /* Allocate new community_list and copy given name. */
 182         new = community_list_new();
 183         new->name = XSTRDUP(MTYPE_COMMUNITY_LIST_NAME, name);
 184         new->name_hash = bgp_clist_hash_key_community_list(new);
 185
 186         /* Save for later */
 187         hash_get(cm->hash, new, hash_alloc_intern);
 188
 189         /* If name is made by all digit character.  We treat it as
 190            number. */
 191         for (number = 0, i = 0; i < strlen(name); i++) {
 192                 if (isdigit((unsigned char)name[i]))
 193                         number = (number * 10) + (name[i] - '0');
 194                 else
 195                         break;
 196         }
 197
 198         /* In case of name is all digit character */
 199         if (i == strlen(name)) {
 200                 new->sort = COMMUNITY_LIST_NUMBER;
 201
 202                 /* Set access_list to number list. */
 203                 list = &cm->num;
 204
 205                 for (point = list->head; point; point = point->next)
 206                         if (atol(point->name) >= number)
 207                                 break;
 208         } else {
 209                 new->sort = COMMUNITY_LIST_STRING;
 210
 211                 /* Set access_list to string list. */
 212                 list = &cm->str;
 213
 214                 /* Set point to insertion point. */
 215                 for (point = list->head; point; point = point->next)
 216                         if (strcmp(point->name, name) >= 0)
 217                                 break;
 218         }
 219
 220         /* Link to upper list.  */
 221         new->parent = list;
 222
 223         /* In case of this is the first element of master. */
 224         if (list->head == NULL) {
 225                 list->head = list->tail = new;
 226                 return new;
 227         }
 228
 229         /* In case of insertion is made at the tail of access_list. */
 230         if (point == NULL) {
 231                 new->prev = list->tail;
 232                 list->tail->next = new;
 233                 list->tail = new;
 234                 return new;
 235         }
 236
 237         /* In case of insertion is made at the head of access_list. */
 238         if (point == list->head) {
 239                 new->next = list->head;
 240                 list->head->prev = new;
 241                 list->head = new;
 242                 return new;
 243         }
 244
 245         /* Insertion is made at middle of the access_list. */
 246         new->next = point;
 247         new->prev = point->prev;
 248
 249         if (point->prev)
 250                 point->prev->next = new;
 251         point->prev = new;
 252
 253         return new;
 254 }
 255
 256 struct community_list *community_list_lookup(struct community_list_handler *ch,
 257                                              const char *name,
 258                                              uint32_t name_hash,
 259                                              int master)
 260 {
 261         struct community_list lookup;
 262         struct community_list_master *cm;
 263
 264         if (!name)
 265                 return NULL;
 266
 267         cm = community_list_master_lookup(ch, master);
 268         if (!cm)
 269                 return NULL;
 270
 271         lookup.name = (char *)name;
 272         lookup.name_hash = name_hash;
 273         return hash_get(cm->hash, &lookup, NULL);
 274 }
 275
 276 static struct community_list *
 277 community_list_get(struct community_list_handler *ch, const char *name,
 278                    int master)
 279 {
 280         struct community_list *list;
 281
 282         list = community_list_lookup(ch, name, 0, master);
 283         if (!list)
 284                 list = community_list_insert(ch, name, master);
 285         return list;
 286 }
 287
 288 static void community_list_delete(struct community_list_master *cm,
 289                                   struct community_list *list)
 290 {
 291         struct community_list_list *clist;
 292         struct community_entry *entry, *next;
 293
 294         for (entry = list->head; entry; entry = next) {
 295                 next = entry->next;
 296                 community_entry_free(entry);
 297         }
 298
 299         clist = list->parent;
 300
 301         if (list->next)
 302                 list->next->prev = list->prev;
 303         else
 304                 clist->tail = list->prev;
 305
 306         if (list->prev)
 307                 list->prev->next = list->next;
 308         else
 309                 clist->head = list->next;
 310
 311         hash_release(cm->hash, list);
 312         community_list_free(list);
 313 }
 314
 315 static bool community_list_empty_p(struct community_list *list)
 316 {
 317         return list->head == NULL && list->tail == NULL;
 318 }
 319
 320 /* Delete community-list entry from the list.  */
 321 static void community_list_entry_delete(struct community_list_master *cm,
 322                                         struct community_list *list,
 323                                         struct community_entry *entry)
 324 {
 325         if (entry->next)
 326                 entry->next->prev = entry->prev;
 327         else
 328                 list->tail = entry->prev;
 329
 330         if (entry->prev)
 331                 entry->prev->next = entry->next;
 332         else
 333                 list->head = entry->next;
 334
 335         community_entry_free(entry);
 336
 337         if (community_list_empty_p(list))
 338                 community_list_delete(cm, list);
 339 }
 340
 341 /*
 342  * Replace community-list entry in the list. Note that entry is the new one
 343  * and replace is one one being replaced.
 344  */
 345 static void community_list_entry_replace(struct community_list *list,
 346                                          struct community_entry *replace,
 347                                          struct community_entry *entry)
 348 {
 349         if (replace->next) {
 350                 entry->next = replace->next;
 351                 replace->next->prev = entry;
 352         } else {
 353                 entry->next = NULL;
 354                 list->tail = entry;
 355         }
 356
 357         if (replace->prev) {
 358                 entry->prev = replace->prev;
 359                 replace->prev->next = entry;
 360         } else {
 361                 entry->prev = NULL;
 362                 list->head = entry;
 363         }
 364
 365         community_entry_free(replace);
 366 }
 367
 368 /* Add community-list entry to the list.  */
 369 static void community_list_entry_add(struct community_list *list,
 370                                      struct community_entry *entry,
 371                                      struct community_list_handler *ch,
 372                                      int master)
 373 {
 374         struct community_entry *replace;
 375         struct community_entry *point;
 376
 377         /* Automatic assignment of seq no. */
 378         if (entry->seq == COMMUNITY_SEQ_NUMBER_AUTO)
 379                 entry->seq = bgp_clist_new_seq_get(list);
 380
 381         if (list->tail && entry->seq > list->tail->seq)
 382                 point = NULL;
 383         else {
 384                 replace = bgp_clist_seq_check(list, entry->seq);
 385                 if (replace) {
 386                         community_list_entry_replace(list, replace, entry);
 387                         return;
 388                 }
 389
 390                 /* Check insert point. */
 391                 for (point = list->head; point; point = point->next)
 392                         if (point->seq >= entry->seq)
 393                                 break;
 394         }
 395
 396         /* In case of this is the first element of the list. */
 397         entry->next = point;
 398
 399         if (point) {
 400                 if (point->prev)
 401                         point->prev->next = entry;
 402                 else
 403                         list->head = entry;
 404
 405                 entry->prev = point->prev;
 406                 point->prev = entry;
 407         } else {
 408                 if (list->tail)
 409                         list->tail->next = entry;
 410                 else
 411                         list->head = entry;
 412
 413                 entry->prev = list->tail;
 414                 list->tail = entry;
 415         }
 416 }
 417
 418 /* Lookup community-list entry from the list.  */
 419 static struct community_entry *
 420 community_list_entry_lookup(struct community_list *list, const void *arg,
 421                             int direct)
 422 {
 423         struct community_entry *entry;
 424
 425         for (entry = list->head; entry; entry = entry->next) {
 426                 switch (entry->style) {
 427                 case COMMUNITY_LIST_STANDARD:
 428                         if (entry->direct == direct
 429                             && community_cmp(entry->u.com, arg))
 430                                 return entry;
 431                         break;
 432                 case EXTCOMMUNITY_LIST_STANDARD:
 433                         if (entry->direct == direct
 434                             && ecommunity_cmp(entry->u.ecom, arg))
 435                                 return entry;
 436                         break;
 437                 case LARGE_COMMUNITY_LIST_STANDARD:
 438                         if (entry->direct == direct
 439                             && lcommunity_cmp(entry->u.lcom, arg))
 440                                 return entry;
 441                         break;
 442                 case COMMUNITY_LIST_EXPANDED:
 443                 case EXTCOMMUNITY_LIST_EXPANDED:
 444                 case LARGE_COMMUNITY_LIST_EXPANDED:
 445                         if (entry->direct == direct
 446                             && strcmp(entry->config, arg) == 0)
 447                                 return entry;
 448                         break;
 449                 default:
 450                         break;
 451                 }
 452         }
 453         return NULL;
 454 }
 455
 456 static char *community_str_get(struct community *com, int i)
 457 {
 458         uint32_t comval;
 459         uint16_t as;
 460         uint16_t val;
 461         char *str;
 462
 463         memcpy(&comval, com_nthval(com, i), sizeof(uint32_t));
 464         comval = ntohl(comval);
 465
 466         switch (comval) {
 467         case COMMUNITY_INTERNET:
 468                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "internet");
 469                 break;
 470         case COMMUNITY_GSHUT:
 471                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "graceful-shutdown");
 472                 break;
 473         case COMMUNITY_ACCEPT_OWN:
 474                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "accept-own");
 475                 break;
 476         case COMMUNITY_ROUTE_FILTER_TRANSLATED_v4:
 477                 str = XSTRDUP(MTYPE_COMMUNITY_STR,
 478                               "route-filter-translated-v4");
 479                 break;
 480         case COMMUNITY_ROUTE_FILTER_v4:
 481                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "route-filter-v4");
 482                 break;
 483         case COMMUNITY_ROUTE_FILTER_TRANSLATED_v6:
 484                 str = XSTRDUP(MTYPE_COMMUNITY_STR,
 485                               "route-filter-translated-v6");
 486                 break;
 487         case COMMUNITY_ROUTE_FILTER_v6:
 488                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "route-filter-v6");
 489                 break;
 490         case COMMUNITY_LLGR_STALE:
 491                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "llgr-stale");
 492                 break;
 493         case COMMUNITY_NO_LLGR:
 494                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "no-llgr");
 495                 break;
 496         case COMMUNITY_ACCEPT_OWN_NEXTHOP:
 497                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "accept-own-nexthop");
 498                 break;
 499         case COMMUNITY_BLACKHOLE:
 500                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "blackhole");
 501                 break;
 502         case COMMUNITY_NO_EXPORT:
 503                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "no-export");
 504                 break;
 505         case COMMUNITY_NO_ADVERTISE:
 506                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "no-advertise");
 507                 break;
 508         case COMMUNITY_LOCAL_AS:
 509                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "local-AS");
 510                 break;
 511         case COMMUNITY_NO_PEER:
 512                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "no-peer");
 513                 break;
 514         default:
 515                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "65536:65535");
 516                 as = (comval >> 16) & 0xFFFF;
 517                 val = comval & 0xFFFF;
 518                 snprintf(str, strlen(str), "%u:%d", as, val);
 519                 break;
 520         }
 521
 522         return str;
 523 }
 524
 525 /* Internal function to perform regular expression match for
 526  * a single community. */
 527 static bool community_regexp_include(regex_t *reg, struct community *com, int i)
 528 {
 529         char *str;
 530         int rv;
 531
 532         /* When there is no communities attribute it is treated as empty string.
 533          */
 534         if (com == NULL || com->size == 0)
 535                 str = XSTRDUP(MTYPE_COMMUNITY_STR, "");
 536         else
 537                 str = community_str_get(com, i);
 538
 539         /* Regular expression match.  */
 540         rv = regexec(reg, str, 0, NULL, 0);
 541
 542         XFREE(MTYPE_COMMUNITY_STR, str);
 543
 544         return rv == 0;
 545 }
 546
 547 /* Internal function to perform regular expression match for community
 548    attribute.  */
 549 static bool community_regexp_match(struct community *com, regex_t *reg)
 550 {
 551         const char *str;
 552         char *regstr;
 553         int rv;
 554
 555         /* When there is no communities attribute it is treated as empty
 556            string.  */
 557         if (com == NULL || com->size == 0)
 558                 str = "";
 559         else
 560                 str = community_str(com, false, true);
 561
 562         regstr = bgp_alias2community_str(str);
 563
 564         /* Regular expression match.  */
 565         rv = regexec(reg, regstr, 0, NULL, 0);
 566
 567         XFREE(MTYPE_TMP, regstr);
 568
 569         return rv == 0;
 570 }
 571
 572 static char *lcommunity_str_get(struct lcommunity *lcom, int i)
 573 {
 574         struct lcommunity_val lcomval;
 575         uint32_t globaladmin;
 576         uint32_t localdata1;
 577         uint32_t localdata2;
 578         char *str;
 579         const uint8_t *ptr;
 580
 581         ptr = lcom->val + (i * LCOMMUNITY_SIZE);
 582
 583         memcpy(&lcomval, ptr, LCOMMUNITY_SIZE);
 584
 585         /* Allocate memory.  48 bytes taken off bgp_lcommunity.c */
 586         ptr = (uint8_t *)lcomval.val;
 587         ptr = ptr_get_be32(ptr, &globaladmin);
 588         ptr = ptr_get_be32(ptr, &localdata1);
 589         ptr = ptr_get_be32(ptr, &localdata2);
 590         (void)ptr; /* consume value */
 591
 592         str = XMALLOC(MTYPE_LCOMMUNITY_STR, 48);
 593         snprintf(str, 48, "%u:%u:%u", globaladmin, localdata1, localdata2);
 594
 595         return str;
 596 }
 597
 598 /* Internal function to perform regular expression match for
 599  * a single community. */
 600 static bool lcommunity_regexp_include(regex_t *reg, struct lcommunity *lcom,
 601                                       int i)
 602 {
 603         char *str;
 604
 605         /* When there is no communities attribute it is treated as empty string.
 606          */
 607         if (lcom == NULL || lcom->size == 0)
 608                 str = XSTRDUP(MTYPE_LCOMMUNITY_STR, "");
 609         else
 610                 str = lcommunity_str_get(lcom, i);
 611
 612         /* Regular expression match.  */
 613         if (regexec(reg, str, 0, NULL, 0) == 0) {
 614                 XFREE(MTYPE_LCOMMUNITY_STR, str);
 615                 return true;
 616         }
 617
 618         XFREE(MTYPE_LCOMMUNITY_STR, str);
 619         /* No match.  */
 620         return false;
 621 }
 622
 623 static bool lcommunity_regexp_match(struct lcommunity *com, regex_t *reg)
 624 {
 625         const char *str;
 626         char *regstr;
 627         int rv;
 628
 629         /* When there is no communities attribute it is treated as empty
 630            string.  */
 631         if (com == NULL || com->size == 0)
 632                 str = "";
 633         else
 634                 str = lcommunity_str(com, false, true);
 635
 636         regstr = bgp_alias2community_str(str);
 637
 638         /* Regular expression match.  */
 639         rv = regexec(reg, regstr, 0, NULL, 0);
 640
 641         XFREE(MTYPE_TMP, regstr);
 642
 643         return rv == 0;
 644 }
 645
 646
 647 static bool ecommunity_regexp_match(struct ecommunity *ecom, regex_t *reg)
 648 {
 649         const char *str;
 650
 651         /* When there is no communities attribute it is treated as empty
 652            string.  */
 653         if (ecom == NULL || ecom->size == 0)
 654                 str = "";
 655         else
 656                 str = ecommunity_str(ecom);
 657
 658         /* Regular expression match.  */
 659         if (regexec(reg, str, 0, NULL, 0) == 0)
 660                 return true;
 661
 662         /* No match.  */
 663         return false;
 664 }
 665
 666 /* When given community attribute matches to the community-list return
 667    1 else return 0.  */
 668 bool community_list_match(struct community *com, struct community_list *list)
 669 {
 670         struct community_entry *entry;
 671
 672         for (entry = list->head; entry; entry = entry->next) {
 673                 if (entry->any)
 674                         return entry->direct == COMMUNITY_PERMIT;
 675
 676                 if (entry->style == COMMUNITY_LIST_STANDARD) {
 677                         if (community_include(entry->u.com, COMMUNITY_INTERNET))
 678                                 return entry->direct == COMMUNITY_PERMIT;
 679
 680                         if (community_match(com, entry->u.com))
 681                                 return entry->direct == COMMUNITY_PERMIT;
 682                 } else if (entry->style == COMMUNITY_LIST_EXPANDED) {
 683                         if (community_regexp_match(com, entry->reg))
 684                                 return entry->direct == COMMUNITY_PERMIT;
 685                 }
 686         }
 687         return false;
 688 }
 689
 690 bool lcommunity_list_match(struct lcommunity *lcom, struct community_list *list)
 691 {
 692         struct community_entry *entry;
 693
 694         for (entry = list->head; entry; entry = entry->next) {
 695                 if (entry->any)
 696                         return entry->direct == COMMUNITY_PERMIT;
 697
 698                 if (entry->style == LARGE_COMMUNITY_LIST_STANDARD) {
 699                         if (lcommunity_match(lcom, entry->u.lcom))
 700                                 return entry->direct == COMMUNITY_PERMIT;
 701                 } else if (entry->style == LARGE_COMMUNITY_LIST_EXPANDED) {
 702                         if (lcommunity_regexp_match(lcom, entry->reg))
 703                                 return entry->direct == COMMUNITY_PERMIT;
 704                 }
 705         }
 706         return false;
 707 }
 708
 709
 710 /* Perform exact matching.  In case of expanded large-community-list, do
 711  * same thing as lcommunity_list_match().
 712  */
 713 bool lcommunity_list_exact_match(struct lcommunity *lcom,
 714                                  struct community_list *list)
 715 {
 716         struct community_entry *entry;
 717
 718         for (entry = list->head; entry; entry = entry->next) {
 719                 if (entry->any)
 720                         return entry->direct == COMMUNITY_PERMIT;
 721
 722                 if (entry->style == LARGE_COMMUNITY_LIST_STANDARD) {
 723                         if (lcommunity_cmp(lcom, entry->u.lcom))
 724                                 return entry->direct == COMMUNITY_PERMIT;
 725                 } else if (entry->style == LARGE_COMMUNITY_LIST_EXPANDED) {
 726                         if (lcommunity_regexp_match(lcom, entry->reg))
 727                                 return entry->direct == COMMUNITY_PERMIT;
 728                 }
 729         }
 730         return false;
 731 }
 732
 733 bool ecommunity_list_match(struct ecommunity *ecom, struct community_list *list)
 734 {
 735         struct community_entry *entry;
 736
 737         for (entry = list->head; entry; entry = entry->next) {
 738                 if (entry->any)
 739                         return entry->direct == COMMUNITY_PERMIT;
 740
 741                 if (entry->style == EXTCOMMUNITY_LIST_STANDARD) {
 742                         if (ecommunity_match(ecom, entry->u.ecom))
 743                                 return entry->direct == COMMUNITY_PERMIT;
 744                 } else if (entry->style == EXTCOMMUNITY_LIST_EXPANDED) {
 745                         if (ecommunity_regexp_match(ecom, entry->reg))
 746                                 return entry->direct == COMMUNITY_PERMIT;
 747                 }
 748         }
 749         return false;
 750 }
 751
 752 /* Perform exact matching.  In case of expanded community-list, do
 753    same thing as community_list_match().  */
 754 bool community_list_exact_match(struct community *com,
 755                                 struct community_list *list)
 756 {
 757         struct community_entry *entry;
 758
 759         for (entry = list->head; entry; entry = entry->next) {
 760                 if (entry->any)
 761                         return entry->direct == COMMUNITY_PERMIT;
 762
 763                 if (entry->style == COMMUNITY_LIST_STANDARD) {
 764                         if (community_include(entry->u.com, COMMUNITY_INTERNET))
 765                                 return entry->direct == COMMUNITY_PERMIT;
 766
 767                         if (community_cmp(com, entry->u.com))
 768                                 return entry->direct == COMMUNITY_PERMIT;
 769                 } else if (entry->style == COMMUNITY_LIST_EXPANDED) {
 770                         if (community_regexp_match(com, entry->reg))
 771                                 return entry->direct == COMMUNITY_PERMIT;
 772                 }
 773         }
 774         return false;
 775 }
 776
 777 /* Delete all permitted communities in the list from com.  */
 778 struct community *community_list_match_delete(struct community *com,
 779                                               struct community_list *list)
 780 {
 781         struct community_entry *entry;
 782         uint32_t val;
 783         uint32_t com_index_to_delete[com->size];
 784         int delete_index = 0;
 785         int i;
 786
 787         /* Loop over each community value and evaluate each against the
 788          * community-list.  If we need to delete a community value add its index
 789          * to com_index_to_delete.
 790          */
 791         for (i = 0; i < com->size; i++) {
 792                 val = community_val_get(com, i);
 793
 794                 for (entry = list->head; entry; entry = entry->next) {
 795                         if (entry->any) {
 796                                 if (entry->direct == COMMUNITY_PERMIT) {
 797                                         com_index_to_delete[delete_index] = i;
 798                                         delete_index++;
 799                                 }
 800                                 break;
 801                         }
 802
 803                         else if ((entry->style == COMMUNITY_LIST_STANDARD)
 804                                  && (community_include(entry->u.com,
 805                                                        COMMUNITY_INTERNET)
 806                                      || community_include(entry->u.com, val))) {
 807                                 if (entry->direct == COMMUNITY_PERMIT) {
 808                                         com_index_to_delete[delete_index] = i;
 809                                         delete_index++;
 810                                 }
 811                                 break;
 812                         }
 813
 814                         else if ((entry->style == COMMUNITY_LIST_EXPANDED)
 815                                  && community_regexp_include(entry->reg, com,
 816                                                              i)) {
 817                                 if (entry->direct == COMMUNITY_PERMIT) {
 818                                         com_index_to_delete[delete_index] = i;
 819                                         delete_index++;
 820                                 }
 821                                 break;
 822                         }
 823                 }
 824         }
 825
 826         /* Delete all of the communities we flagged for deletion */
 827         for (i = delete_index - 1; i >= 0; i--) {
 828                 val = community_val_get(com, com_index_to_delete[i]);
 829                 val = htonl(val);
 830                 community_del_val(com, &val);
 831         }
 832
 833         return com;
 834 }
 835
 836 /* To avoid duplicated entry in the community-list, this function
 837    compares specified entry to existing entry.  */
 838 static bool community_list_dup_check(struct community_list *list,
 839                                      struct community_entry *new)
 840 {
 841         struct community_entry *entry;
 842
 843         for (entry = list->head; entry; entry = entry->next) {
 844                 if (entry->style != new->style)
 845                         continue;
 846
 847                 if (entry->direct != new->direct)
 848                         continue;
 849
 850                 if (entry->any != new->any)
 851                         continue;
 852
 853                 if (entry->any)
 854                         return true;
 855
 856                 switch (entry->style) {
 857                 case COMMUNITY_LIST_STANDARD:
 858                         if (community_cmp(entry->u.com, new->u.com))
 859                                 return true;
 860                         break;
 861                 case LARGE_COMMUNITY_LIST_STANDARD:
 862                         if (lcommunity_cmp(entry->u.lcom, new->u.lcom))
 863                                 return true;
 864                         break;
 865                 case EXTCOMMUNITY_LIST_STANDARD:
 866                         if (ecommunity_cmp(entry->u.ecom, new->u.ecom))
 867                                 return true;
 868                         break;
 869                 case COMMUNITY_LIST_EXPANDED:
 870                 case EXTCOMMUNITY_LIST_EXPANDED:
 871                 case LARGE_COMMUNITY_LIST_EXPANDED:
 872                         if (strcmp(entry->config, new->config) == 0)
 873                                 return true;
 874                         break;
 875                 default:
 876                         break;
 877                 }
 878         }
 879         return false;
 880 }
 881
 882 /* Set community-list.  */
 883 int community_list_set(struct community_list_handler *ch, const char *name,
 884                        const char *str, const char *seq, int direct, int style)
 885 {
 886         struct community_entry *entry = NULL;
 887         struct community_list *list;
 888         struct community *com = NULL;
 889         regex_t *regex = NULL;
 890         int64_t seqnum = COMMUNITY_SEQ_NUMBER_AUTO;
 891
 892         if (seq)
 893                 seqnum = (int64_t)atol(seq);
 894
 895         /* Get community list. */
 896         list = community_list_get(ch, name, COMMUNITY_LIST_MASTER);
 897
 898         /* When community-list already has entry, new entry should have same
 899            style.  If you want to have mixed style community-list, you can
 900            comment out this check.  */
 901         if (!community_list_empty_p(list)) {
 902                 struct community_entry *first;
 903
 904                 first = list->head;
 905
 906                 if (style != first->style) {
 907                         return (first->style == COMMUNITY_LIST_STANDARD
 908                                         ? COMMUNITY_LIST_ERR_STANDARD_CONFLICT
 909                                         : COMMUNITY_LIST_ERR_EXPANDED_CONFLICT);
 910                 }
 911         }
 912
 913         if (str) {
 914                 if (style == COMMUNITY_LIST_STANDARD)
 915                         com = community_str2com(str);
 916                 else
 917                         regex = bgp_regcomp(str);
 918
 919                 if (!com && !regex)
 920                         return COMMUNITY_LIST_ERR_MALFORMED_VAL;
 921         }
 922
 923         entry = community_entry_new();
 924         entry->direct = direct;
 925         entry->style = style;
 926         entry->any = (str ? false : true);
 927         entry->u.com = com;
 928         entry->reg = regex;
 929         entry->seq = seqnum;
 930         entry->config =
 931                 (regex ? XSTRDUP(MTYPE_COMMUNITY_LIST_CONFIG, str) : NULL);
 932
 933         /* Do not put duplicated community entry.  */
 934         if (community_list_dup_check(list, entry))
 935                 community_entry_free(entry);
 936         else {
 937                 community_list_entry_add(list, entry, ch,
 938                                          COMMUNITY_LIST_MASTER);
 939                 route_map_notify_dependencies(name, RMAP_EVENT_CLIST_ADDED);
 940         }
 941
 942         return 0;
 943 }
 944
 945 /* Unset community-list */
 946 int community_list_unset(struct community_list_handler *ch, const char *name,
 947                          const char *str, const char *seq, int direct,
 948                          int style)
 949 {
 950         struct community_list_master *cm = NULL;
 951         struct community_entry *entry = NULL;
 952         struct community_list *list;
 953         struct community *com = NULL;
 954
 955         /* Lookup community list.  */
 956         list = community_list_lookup(ch, name, 0, COMMUNITY_LIST_MASTER);
 957         if (list == NULL)
 958                 return COMMUNITY_LIST_ERR_CANT_FIND_LIST;
 959
 960         cm = community_list_master_lookup(ch, COMMUNITY_LIST_MASTER);
 961         /* Delete all of entry belongs to this community-list.  */
 962         if (!str) {
 963                 community_list_delete(cm, list);
 964                 route_map_notify_dependencies(name, RMAP_EVENT_CLIST_DELETED);
 965                 return 0;
 966         }
 967
 968         if (style == COMMUNITY_LIST_STANDARD)
 969                 com = community_str2com(str);
 970
 971         if (com) {
 972                 entry = community_list_entry_lookup(list, com, direct);
 973                 community_free(&com);
 974         } else
 975                 entry = community_list_entry_lookup(list, str, direct);
 976
 977         if (!entry)
 978                 return COMMUNITY_LIST_ERR_CANT_FIND_LIST;
 979
 980         community_list_entry_delete(cm, list, entry);
 981         route_map_notify_dependencies(name, RMAP_EVENT_CLIST_DELETED);
 982
 983         return 0;
 984 }
 985
 986 /* Delete all permitted large communities in the list from com.  */
 987 struct lcommunity *lcommunity_list_match_delete(struct lcommunity *lcom,
 988                                                 struct community_list *list)
 989 {
 990         struct community_entry *entry;
 991         uint32_t com_index_to_delete[lcom->size];
 992         uint8_t *ptr;
 993         int delete_index = 0;
 994         int i;
 995
 996         /* Loop over each lcommunity value and evaluate each against the
 997          * community-list.  If we need to delete a community value add its index
 998          * to com_index_to_delete.
 999          */
1000         for (i = 0; i < lcom->size; i++) {
1001                 ptr = lcom->val + (i * LCOMMUNITY_SIZE);
1002                 for (entry = list->head; entry; entry = entry->next) {
1003                         if (entry->any) {
1004                                 if (entry->direct == COMMUNITY_PERMIT) {
1005                                         com_index_to_delete[delete_index] = i;
1006                                         delete_index++;
1007                                 }
1008                                 break;
1009                         }
1010
1011                         else if ((entry->style == LARGE_COMMUNITY_LIST_STANDARD)
1012                                  && lcommunity_include(entry->u.lcom, ptr)) {
1013                                 if (entry->direct == COMMUNITY_PERMIT) {
1014                                         com_index_to_delete[delete_index] = i;
1015                                         delete_index++;
1016                                 }
1017                                 break;
1018                         }
1019
1020                         else if ((entry->style == LARGE_COMMUNITY_LIST_EXPANDED)
1021                                  && lcommunity_regexp_include(entry->reg, lcom,
1022                                                               i)) {
1023                                 if (entry->direct == COMMUNITY_PERMIT) {
1024                                         com_index_to_delete[delete_index] = i;
1025                                         delete_index++;
1026                                 }
1027                                 break;
1028                         }
1029                 }
1030         }
1031
1032         /* Delete all of the communities we flagged for deletion */
1033         for (i = delete_index - 1; i >= 0; i--) {
1034                 ptr = lcom->val + (com_index_to_delete[i] * LCOMMUNITY_SIZE);
1035                 lcommunity_del_val(lcom, ptr);
1036         }
1037
1038         return lcom;
1039 }
1040
1041 /* Helper to check if every octet do not exceed UINT_MAX */
1042 bool lcommunity_list_valid(const char *community, int style)
1043 {
1044         int octets;
1045         char **splits, **communities;
1046         char *endptr;
1047         int num, num_communities;
1048         regex_t *regres;
1049         int invalid = 0;
1050
1051         frrstr_split(community, " ", &communities, &num_communities);
1052
1053         for (int j = 0; j < num_communities; j++) {
1054                 octets = 0;
1055                 frrstr_split(communities[j], ":", &splits, &num);
1056
1057                 for (int i = 0; i < num; i++) {
1058                         if (strlen(splits[i]) == 0)
1059                                 /* There is no digit to check */
1060                                 invalid++;
1061
1062                         if (style == LARGE_COMMUNITY_LIST_STANDARD) {
1063                                 if (*splits[i] == '-')
1064                                         /* Must not be negative */
1065                                         invalid++;
1066                                 else if (strtoul(splits[i], &endptr, 10)
1067                                          > UINT_MAX)
1068                                         /* Larger than 4 octets */
1069                                         invalid++;
1070                                 else if (*endptr)
1071                                         /* Not all characters were digits */
1072                                         invalid++;
1073                         } else {
1074                                 regres = bgp_regcomp(communities[j]);
1075                                 if (!regres)
1076                                         /* malformed regex */
1077                                         invalid++;
1078                                 else
1079                                         bgp_regex_free(regres);
1080                         }
1081
1082                         octets++;
1083                         XFREE(MTYPE_TMP, splits[i]);
1084                 }
1085                 XFREE(MTYPE_TMP, splits);
1086
1087                 if (octets != 3)
1088                         invalid++;
1089
1090                 XFREE(MTYPE_TMP, communities[j]);
1091         }
1092         XFREE(MTYPE_TMP, communities);
1093
1094         return (invalid > 0) ? false : true;
1095 }
1096
1097 /* Set lcommunity-list.  */
1098 int lcommunity_list_set(struct community_list_handler *ch, const char *name,
1099                         const char *str, const char *seq, int direct, int style)
1100 {
1101         struct community_entry *entry = NULL;
1102         struct community_list *list;
1103         struct lcommunity *lcom = NULL;
1104         regex_t *regex = NULL;
1105         int64_t seqnum = COMMUNITY_SEQ_NUMBER_AUTO;
1106
1107         if (seq)
1108                 seqnum = (int64_t)atol(seq);
1109
1110         /* Get community list. */
1111         list = community_list_get(ch, name, LARGE_COMMUNITY_LIST_MASTER);
1112
1113         /* When community-list already has entry, new entry should have same
1114            style.  If you want to have mixed style community-list, you can
1115            comment out this check.  */
1116         if (!community_list_empty_p(list)) {
1117                 struct community_entry *first;
1118
1119                 first = list->head;
1120
1121                 if (style != first->style) {
1122                         return (first->style == COMMUNITY_LIST_STANDARD
1123                                         ? COMMUNITY_LIST_ERR_STANDARD_CONFLICT
1124                                         : COMMUNITY_LIST_ERR_EXPANDED_CONFLICT);
1125                 }
1126         }
1127
1128         if (str) {
1129                 if (style == LARGE_COMMUNITY_LIST_STANDARD)
1130                         lcom = lcommunity_str2com(str);
1131                 else
1132                         regex = bgp_regcomp(str);
1133
1134                 if (!lcom && !regex)
1135                         return COMMUNITY_LIST_ERR_MALFORMED_VAL;
1136         }
1137
1138         entry = community_entry_new();
1139         entry->direct = direct;
1140         entry->style = style;
1141         entry->any = (str ? false : true);
1142         entry->u.lcom = lcom;
1143         entry->reg = regex;
1144         entry->seq = seqnum;
1145         entry->config =
1146                 (regex ? XSTRDUP(MTYPE_COMMUNITY_LIST_CONFIG, str) : NULL);
1147
1148         /* Do not put duplicated community entry.  */
1149         if (community_list_dup_check(list, entry))
1150                 community_entry_free(entry);
1151         else {
1152                 community_list_entry_add(list, entry, ch,
1153                                          LARGE_COMMUNITY_LIST_MASTER);
1154                 route_map_notify_dependencies(name, RMAP_EVENT_LLIST_ADDED);
1155         }
1156
1157         return 0;
1158 }
1159
1160 /* Unset community-list.  When str is NULL, delete all of
1161    community-list entry belongs to the specified name.  */
1162 int lcommunity_list_unset(struct community_list_handler *ch, const char *name,
1163                           const char *str, const char *seq, int direct,
1164                           int style)
1165 {
1166         struct community_list_master *cm = NULL;
1167         struct community_entry *entry = NULL;
1168         struct community_list *list;
1169         struct lcommunity *lcom = NULL;
1170         regex_t *regex = NULL;
1171
1172         /* Lookup community list.  */
1173         list = community_list_lookup(ch, name, 0, LARGE_COMMUNITY_LIST_MASTER);
1174         if (list == NULL)
1175                 return COMMUNITY_LIST_ERR_CANT_FIND_LIST;
1176
1177         cm = community_list_master_lookup(ch, LARGE_COMMUNITY_LIST_MASTER);
1178         /* Delete all of entry belongs to this community-list.  */
1179         if (!str) {
1180                 community_list_delete(cm, list);
1181                 route_map_notify_dependencies(name, RMAP_EVENT_LLIST_DELETED);
1182                 return 0;
1183         }
1184
1185         if (style == LARGE_COMMUNITY_LIST_STANDARD)
1186                 lcom = lcommunity_str2com(str);
1187         else
1188                 regex = bgp_regcomp(str);
1189
1190         if (!lcom && !regex)
1191                 return COMMUNITY_LIST_ERR_MALFORMED_VAL;
1192
1193         if (lcom)
1194                 entry = community_list_entry_lookup(list, lcom, direct);
1195         else
1196                 entry = community_list_entry_lookup(list, str, direct);
1197
1198         if (lcom)
1199                 lcommunity_free(&lcom);
1200         if (regex)
1201                 bgp_regex_free(regex);
1202
1203         if (!entry)
1204                 return COMMUNITY_LIST_ERR_CANT_FIND_LIST;
1205
1206         community_list_entry_delete(cm, list, entry);
1207         route_map_notify_dependencies(name, RMAP_EVENT_LLIST_DELETED);
1208
1209         return 0;
1210 }
1211
1212 /* Set extcommunity-list.  */
1213 int extcommunity_list_set(struct community_list_handler *ch, const char *name,
1214                           const char *str, const char *seq, int direct,
1215                           int style)
1216 {
1217         struct community_entry *entry = NULL;
1218         struct community_list *list;
1219         struct ecommunity *ecom = NULL;
1220         regex_t *regex = NULL;
1221         int64_t seqnum = COMMUNITY_SEQ_NUMBER_AUTO;
1222
1223         if (seq)
1224                 seqnum = (int64_t)atol(seq);
1225
1226         if (str == NULL)
1227                 return COMMUNITY_LIST_ERR_MALFORMED_VAL;
1228
1229         /* Get community list. */
1230         list = community_list_get(ch, name, EXTCOMMUNITY_LIST_MASTER);
1231
1232         /* When community-list already has entry, new entry should have same
1233            style.  If you want to have mixed style community-list, you can
1234            comment out this check.  */
1235         if (!community_list_empty_p(list)) {
1236                 struct community_entry *first;
1237
1238                 first = list->head;
1239
1240                 if (style != first->style) {
1241                         return (first->style == EXTCOMMUNITY_LIST_STANDARD
1242                                         ? COMMUNITY_LIST_ERR_STANDARD_CONFLICT
1243                                         : COMMUNITY_LIST_ERR_EXPANDED_CONFLICT);
1244                 }
1245         }
1246
1247         if (style == EXTCOMMUNITY_LIST_STANDARD)
1248                 ecom = ecommunity_str2com(str, 0, 1);
1249         else
1250                 regex = bgp_regcomp(str);
1251
1252         if (!ecom && !regex)
1253                 return COMMUNITY_LIST_ERR_MALFORMED_VAL;
1254
1255         if (ecom)
1256                 ecom->str =
1257                         ecommunity_ecom2str(ecom, ECOMMUNITY_FORMAT_DISPLAY, 0);
1258
1259         entry = community_entry_new();
1260         entry->direct = direct;
1261         entry->style = style;
1262         entry->any = false;
1263         if (ecom)
1264                 entry->config = ecommunity_ecom2str(
1265                         ecom, ECOMMUNITY_FORMAT_COMMUNITY_LIST, 0);
1266         else if (regex)
1267                 entry->config = XSTRDUP(MTYPE_COMMUNITY_LIST_CONFIG, str);
1268
1269         entry->u.ecom = ecom;
1270         entry->reg = regex;
1271         entry->seq = seqnum;
1272
1273         /* Do not put duplicated community entry.  */
1274         if (community_list_dup_check(list, entry))
1275                 community_entry_free(entry);
1276         else {
1277                 community_list_entry_add(list, entry, ch,
1278                                          EXTCOMMUNITY_LIST_MASTER);
1279                 route_map_notify_dependencies(name, RMAP_EVENT_ECLIST_ADDED);
1280         }
1281
1282         return 0;
1283 }
1284
1285 /* Unset extcommunity-list.
1286  *
1287  * When str is NULL, delete all extcommunity-list entries belonging to the
1288  * specified name.
1289  */
1290 int extcommunity_list_unset(struct community_list_handler *ch, const char *name,
1291                             const char *str, const char *seq, int direct,
1292                             int style)
1293 {
1294         struct community_list_master *cm = NULL;
1295         struct community_entry *entry = NULL;
1296         struct community_list *list;
1297         struct ecommunity *ecom = NULL;
1298
1299         /* Lookup extcommunity list.  */
1300         list = community_list_lookup(ch, name, 0, EXTCOMMUNITY_LIST_MASTER);
1301         if (list == NULL)
1302                 return COMMUNITY_LIST_ERR_CANT_FIND_LIST;
1303
1304         cm = community_list_master_lookup(ch, EXTCOMMUNITY_LIST_MASTER);
1305         /* Delete all of entry belongs to this extcommunity-list.  */
1306         if (!str) {
1307                 community_list_delete(cm, list);
1308                 route_map_notify_dependencies(name, RMAP_EVENT_ECLIST_DELETED);
1309                 return 0;
1310         }
1311
1312         if (style == EXTCOMMUNITY_LIST_STANDARD)
1313                 ecom = ecommunity_str2com(str, 0, 1);
1314
1315         if (ecom) {
1316                 entry = community_list_entry_lookup(list, ecom, direct);
1317                 ecommunity_free(&ecom);
1318         } else
1319                 entry = community_list_entry_lookup(list, str, direct);
1320
1321         if (!entry)
1322                 return COMMUNITY_LIST_ERR_CANT_FIND_LIST;
1323
1324         community_list_entry_delete(cm, list, entry);
1325         route_map_notify_dependencies(name, RMAP_EVENT_ECLIST_DELETED);
1326
1327         return 0;
1328 }
1329
1330 /* Initializa community-list.  Return community-list handler.  */
1331 struct community_list_handler *community_list_init(void)
1332 {
1333         struct community_list_handler *ch;
1334         ch = XCALLOC(MTYPE_COMMUNITY_LIST_HANDLER,
1335                      sizeof(struct community_list_handler));
1336
1337         ch->community_list.hash =
1338                 hash_create_size(4, bgp_clist_hash_key_community_list,
1339                                  bgp_clist_hash_cmp_community_list,
1340                                  "Community List Number Quick Lookup");
1341
1342         ch->extcommunity_list.hash =
1343                 hash_create_size(4, bgp_clist_hash_key_community_list,
1344                                  bgp_clist_hash_cmp_community_list,
1345                                  "Extended Community List Quick Lookup");
1346
1347         ch->lcommunity_list.hash =
1348                 hash_create_size(4, bgp_clist_hash_key_community_list,
1349                                  bgp_clist_hash_cmp_community_list,
1350                                  "Large Community List Quick Lookup");
1351
1352         return ch;
1353 }
1354
1355 /* Terminate community-list.  */
1356 void community_list_terminate(struct community_list_handler *ch)
1357 {
1358         struct community_list_master *cm;
1359         struct community_list *list;
1360
1361         cm = &ch->community_list;
1362         while ((list = cm->num.head) != NULL)
1363                 community_list_delete(cm, list);
1364         while ((list = cm->str.head) != NULL)
1365                 community_list_delete(cm, list);
1366         hash_free(cm->hash);
1367
1368         cm = &ch->lcommunity_list;
1369         while ((list = cm->num.head) != NULL)
1370                 community_list_delete(cm, list);
1371         while ((list = cm->str.head) != NULL)
1372                 community_list_delete(cm, list);
1373         hash_free(cm->hash);
1374
1375         cm = &ch->extcommunity_list;
1376         while ((list = cm->num.head) != NULL)
1377                 community_list_delete(cm, list);
1378         while ((list = cm->str.head) != NULL)
1379                 community_list_delete(cm, list);
1380         hash_free(cm->hash);
1381
1382         XFREE(MTYPE_COMMUNITY_LIST_HANDLER, ch);
1383 }
1384
1385 static int bgp_community_list_vector_walker(struct hash_bucket *bucket,
1386                                             void *data)
1387 {
1388         vector *comps = data;
1389         struct community_list *list = bucket->data;
1390
1391         vector_set(*comps, XSTRDUP(MTYPE_COMPLETION, list->name));
1392
1393         return 1;
1394 }
1395
1396 static void bgp_community_list_cmd_completion(vector comps,
1397                                               struct cmd_token *token)
1398 {
1399         struct community_list_master *cm;
1400
1401         cm = community_list_master_lookup(bgp_clist, COMMUNITY_LIST_MASTER);
1402
1403         hash_walk(cm->hash, bgp_community_list_vector_walker, &comps);
1404 }
1405
1406 static void bgp_lcommunity_list_cmd_completion(vector comps,
1407                                                struct cmd_token *token)
1408 {
1409         struct community_list_master *cm;
1410
1411         cm = community_list_master_lookup(bgp_clist,
1412                                           LARGE_COMMUNITY_LIST_MASTER);
1413
1414         hash_walk(cm->hash, bgp_community_list_vector_walker, &comps);
1415 }
1416
1417 static void bgp_extcommunity_list_cmd_completion(vector comps,
1418                                                  struct cmd_token *token)
1419 {
1420         struct community_list_master *cm;
1421
1422         cm = community_list_master_lookup(bgp_clist, EXTCOMMUNITY_LIST_MASTER);
1423
1424         hash_walk(cm->hash, bgp_community_list_vector_walker, &comps);
1425 }
1426
1427 static const struct cmd_variable_handler community_list_handlers[] = {
1428         {.tokenname = "COMMUNITY_LIST_NAME",
1429          .completions = bgp_community_list_cmd_completion},
1430         {.completions = NULL}};
1431
1432 static const struct cmd_variable_handler lcommunity_list_handlers[] = {
1433         {.tokenname = "LCOMMUNITY_LIST_NAME",
1434          .completions = bgp_lcommunity_list_cmd_completion},
1435         {.completions = NULL}};
1436
1437 static const struct cmd_variable_handler extcommunity_list_handlers[] = {
1438         {.tokenname = "EXTCOMMUNITY_LIST_NAME",
1439          .completions = bgp_extcommunity_list_cmd_completion},
1440         {.completions = NULL}};
1441
1442 void bgp_community_list_command_completion_setup(void)
1443 {
1444         cmd_variable_handler_register(community_list_handlers);
1445         cmd_variable_handler_register(lcommunity_list_handlers);
1446         cmd_variable_handler_register(extcommunity_list_handlers);
1447 }