lib/plist.c

   1 /* Prefix list functions.
   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
   7  * it under the terms of the GNU General Public License as published
   8  * by the Free Software Foundation; either version 2, or (at your
   9  * option) any 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 "prefix.h"
  24 #include "command.h"
  25 #include "memory.h"
  26 #include "plist.h"
  27 #include "sockunion.h"
  28 #include "buffer.h"
  29 #include "log.h"
  30 #include "routemap.h"
  31 #include "lib/json.h"
  32 #include "libfrr.h"
  33
  34 #include "plist_int.h"
  35
  36 DEFINE_MTYPE_STATIC(LIB, PREFIX_LIST, "Prefix List")
  37 DEFINE_MTYPE_STATIC(LIB, MPREFIX_LIST_STR, "Prefix List Str")
  38 DEFINE_MTYPE_STATIC(LIB, PREFIX_LIST_ENTRY, "Prefix List Entry")
  39 DEFINE_MTYPE_STATIC(LIB, PREFIX_LIST_TRIE, "Prefix List Trie Table")
  40
  41 /* not currently changeable, code assumes bytes further down */
  42 #define PLC_BITS        8
  43 #define PLC_LEN         (1 << PLC_BITS)
  44 #define PLC_MAXLEVELV4  2       /* /24 for IPv4 */
  45 #define PLC_MAXLEVELV6  4       /* /48 for IPv6 */
  46 #define PLC_MAXLEVEL    4       /* max(v4,v6) */
  47
  48 struct pltrie_entry {
  49         union {
  50                 struct pltrie_table *next_table;
  51                 struct prefix_list_entry *final_chain;
  52         };
  53
  54         struct prefix_list_entry *up_chain;
  55 };
  56
  57 struct pltrie_table {
  58         struct pltrie_entry entries[PLC_LEN];
  59 };
  60
  61 /* List of struct prefix_list. */
  62 struct prefix_list_list {
  63         struct prefix_list *head;
  64         struct prefix_list *tail;
  65 };
  66
  67 /* Master structure of prefix_list. */
  68 struct prefix_master {
  69         /* List of prefix_list which name is number. */
  70         struct prefix_list_list num;
  71
  72         /* List of prefix_list which name is string. */
  73         struct prefix_list_list str;
  74
  75         /* Whether sequential number is used. */
  76         bool seqnum;
  77
  78         /* The latest update. */
  79         struct prefix_list *recent;
  80
  81         /* Hook function which is executed when new prefix_list is added. */
  82         void (*add_hook)(struct prefix_list *);
  83
  84         /* Hook function which is executed when prefix_list is deleted. */
  85         void (*delete_hook)(struct prefix_list *);
  86
  87         /* number of bytes that have a trie level */
  88         size_t trie_depth;
  89 };
  90
  91 /* Static structure of IPv4 prefix_list's master. */
  92 static struct prefix_master prefix_master_ipv4 = {
  93         {NULL, NULL}, {NULL, NULL}, 1, NULL, NULL, NULL, PLC_MAXLEVELV4,
  94 };
  95
  96 /* Static structure of IPv6 prefix-list's master. */
  97 static struct prefix_master prefix_master_ipv6 = {
  98         {NULL, NULL}, {NULL, NULL}, 1, NULL, NULL, NULL, PLC_MAXLEVELV6,
  99 };
 100
 101 /* Static structure of BGP ORF prefix_list's master. */
 102 static struct prefix_master prefix_master_orf_v4 = {
 103         {NULL, NULL}, {NULL, NULL}, 1, NULL, NULL, NULL, PLC_MAXLEVELV4,
 104 };
 105
 106 /* Static structure of BGP ORF prefix_list's master. */
 107 static struct prefix_master prefix_master_orf_v6 = {
 108         {NULL, NULL}, {NULL, NULL}, 1, NULL, NULL, NULL, PLC_MAXLEVELV6,
 109 };
 110
 111 static struct prefix_master *prefix_master_get(afi_t afi, int orf)
 112 {
 113         if (afi == AFI_IP)
 114                 return orf ? &prefix_master_orf_v4 : &prefix_master_ipv4;
 115         if (afi == AFI_IP6)
 116                 return orf ? &prefix_master_orf_v6 : &prefix_master_ipv6;
 117         return NULL;
 118 }
 119
 120 const char *prefix_list_name(struct prefix_list *plist)
 121 {
 122         return plist->name;
 123 }
 124
 125 afi_t prefix_list_afi(struct prefix_list *plist)
 126 {
 127         if (plist->master == &prefix_master_ipv4
 128             || plist->master == &prefix_master_orf_v4)
 129                 return AFI_IP;
 130         return AFI_IP6;
 131 }
 132
 133 /* Lookup prefix_list from list of prefix_list by name. */
 134 static struct prefix_list *prefix_list_lookup_do(afi_t afi, int orf,
 135                                                  const char *name)
 136 {
 137         struct prefix_list *plist;
 138         struct prefix_master *master;
 139
 140         if (name == NULL)
 141                 return NULL;
 142
 143         master = prefix_master_get(afi, orf);
 144         if (master == NULL)
 145                 return NULL;
 146
 147         for (plist = master->num.head; plist; plist = plist->next)
 148                 if (strcmp(plist->name, name) == 0)
 149                         return plist;
 150
 151         for (plist = master->str.head; plist; plist = plist->next)
 152                 if (strcmp(plist->name, name) == 0)
 153                         return plist;
 154
 155         return NULL;
 156 }
 157
 158 struct prefix_list *prefix_list_lookup(afi_t afi, const char *name)
 159 {
 160         return prefix_list_lookup_do(afi, 0, name);
 161 }
 162
 163 struct prefix_list *prefix_bgp_orf_lookup(afi_t afi, const char *name)
 164 {
 165         return prefix_list_lookup_do(afi, 1, name);
 166 }
 167
 168 static struct prefix_list *prefix_list_new(void)
 169 {
 170         struct prefix_list *new;
 171
 172         new = XCALLOC(MTYPE_PREFIX_LIST, sizeof(struct prefix_list));
 173         return new;
 174 }
 175
 176 static void prefix_list_free(struct prefix_list *plist)
 177 {
 178         XFREE(MTYPE_PREFIX_LIST, plist);
 179 }
 180
 181 static struct prefix_list_entry *prefix_list_entry_new(void)
 182 {
 183         struct prefix_list_entry *new;
 184
 185         new = XCALLOC(MTYPE_PREFIX_LIST_ENTRY,
 186                       sizeof(struct prefix_list_entry));
 187         return new;
 188 }
 189
 190 static void prefix_list_entry_free(struct prefix_list_entry *pentry)
 191 {
 192         XFREE(MTYPE_PREFIX_LIST_ENTRY, pentry);
 193 }
 194
 195 /* Insert new prefix list to list of prefix_list.  Each prefix_list
 196    is sorted by the name. */
 197 static struct prefix_list *prefix_list_insert(afi_t afi, int orf,
 198                                               const char *name)
 199 {
 200         unsigned int i;
 201         long number;
 202         struct prefix_list *plist;
 203         struct prefix_list *point;
 204         struct prefix_list_list *list;
 205         struct prefix_master *master;
 206
 207         master = prefix_master_get(afi, orf);
 208         if (master == NULL)
 209                 return NULL;
 210
 211         /* Allocate new prefix_list and copy given name. */
 212         plist = prefix_list_new();
 213         plist->name = XSTRDUP(MTYPE_MPREFIX_LIST_STR, name);
 214         plist->master = master;
 215         plist->trie =
 216                 XCALLOC(MTYPE_PREFIX_LIST_TRIE, sizeof(struct pltrie_table));
 217
 218         /* If name is made by all digit character.  We treat it as
 219            number. */
 220         for (number = 0, i = 0; i < strlen(name); i++) {
 221                 if (isdigit((int)name[i]))
 222                         number = (number * 10) + (name[i] - '0');
 223                 else
 224                         break;
 225         }
 226
 227         /* In case of name is all digit character */
 228         if (i == strlen(name)) {
 229                 plist->type = PREFIX_TYPE_NUMBER;
 230
 231                 /* Set prefix_list to number list. */
 232                 list = &master->num;
 233
 234                 for (point = list->head; point; point = point->next)
 235                         if (atol(point->name) >= number)
 236                                 break;
 237         } else {
 238                 plist->type = PREFIX_TYPE_STRING;
 239
 240                 /* Set prefix_list to string list. */
 241                 list = &master->str;
 242
 243                 /* Set point to insertion point. */
 244                 for (point = list->head; point; point = point->next)
 245                         if (strcmp(point->name, name) >= 0)
 246                                 break;
 247         }
 248
 249         /* In case of this is the first element of master. */
 250         if (list->head == NULL) {
 251                 list->head = list->tail = plist;
 252                 return plist;
 253         }
 254
 255         /* In case of insertion is made at the tail of access_list. */
 256         if (point == NULL) {
 257                 plist->prev = list->tail;
 258                 list->tail->next = plist;
 259                 list->tail = plist;
 260                 return plist;
 261         }
 262
 263         /* In case of insertion is made at the head of access_list. */
 264         if (point == list->head) {
 265                 plist->next = list->head;
 266                 list->head->prev = plist;
 267                 list->head = plist;
 268                 return plist;
 269         }
 270
 271         /* Insertion is made at middle of the access_list. */
 272         plist->next = point;
 273         plist->prev = point->prev;
 274
 275         if (point->prev)
 276                 point->prev->next = plist;
 277         point->prev = plist;
 278
 279         return plist;
 280 }
 281
 282 static struct prefix_list *prefix_list_get(afi_t afi, int orf, const char *name)
 283 {
 284         struct prefix_list *plist;
 285
 286         plist = prefix_list_lookup_do(afi, orf, name);
 287
 288         if (plist == NULL)
 289                 plist = prefix_list_insert(afi, orf, name);
 290         return plist;
 291 }
 292
 293 static void prefix_list_trie_del(struct prefix_list *plist,
 294                                  struct prefix_list_entry *pentry);
 295
 296 /* Delete prefix-list from prefix_list_master and free it. */
 297 static void prefix_list_delete(struct prefix_list *plist)
 298 {
 299         struct prefix_list_list *list;
 300         struct prefix_master *master;
 301         struct prefix_list_entry *pentry;
 302         struct prefix_list_entry *next;
 303
 304         /* If prefix-list contain prefix_list_entry free all of it. */
 305         for (pentry = plist->head; pentry; pentry = next) {
 306                 next = pentry->next;
 307                 prefix_list_trie_del(plist, pentry);
 308                 prefix_list_entry_free(pentry);
 309                 plist->count--;
 310         }
 311
 312         master = plist->master;
 313
 314         if (plist->type == PREFIX_TYPE_NUMBER)
 315                 list = &master->num;
 316         else
 317                 list = &master->str;
 318
 319         if (plist->next)
 320                 plist->next->prev = plist->prev;
 321         else
 322                 list->tail = plist->prev;
 323
 324         if (plist->prev)
 325                 plist->prev->next = plist->next;
 326         else
 327                 list->head = plist->next;
 328
 329         if (plist->desc)
 330                 XFREE(MTYPE_TMP, plist->desc);
 331
 332         /* Make sure master's recent changed prefix-list information is
 333            cleared. */
 334         master->recent = NULL;
 335
 336         route_map_notify_dependencies(plist->name, RMAP_EVENT_PLIST_DELETED);
 337
 338         if (master->delete_hook)
 339                 (*master->delete_hook)(plist);
 340
 341         if (plist->name)
 342                 XFREE(MTYPE_MPREFIX_LIST_STR, plist->name);
 343
 344         XFREE(MTYPE_PREFIX_LIST_TRIE, plist->trie);
 345
 346         prefix_list_free(plist);
 347 }
 348
 349 static struct prefix_list_entry *
 350 prefix_list_entry_make(struct prefix *prefix, enum prefix_list_type type,
 351                        int64_t seq, int le, int ge, int any)
 352 {
 353         struct prefix_list_entry *pentry;
 354
 355         pentry = prefix_list_entry_new();
 356
 357         if (any)
 358                 pentry->any = 1;
 359
 360         prefix_copy(&pentry->prefix, prefix);
 361         pentry->type = type;
 362         pentry->seq = seq;
 363         pentry->le = le;
 364         pentry->ge = ge;
 365
 366         return pentry;
 367 }
 368
 369 /* Add hook function. */
 370 void prefix_list_add_hook(void (*func)(struct prefix_list *plist))
 371 {
 372         prefix_master_ipv4.add_hook = func;
 373         prefix_master_ipv6.add_hook = func;
 374 }
 375
 376 /* Delete hook function. */
 377 void prefix_list_delete_hook(void (*func)(struct prefix_list *plist))
 378 {
 379         prefix_master_ipv4.delete_hook = func;
 380         prefix_master_ipv6.delete_hook = func;
 381 }
 382
 383 /* Calculate new sequential number. */
 384 static int64_t prefix_new_seq_get(struct prefix_list *plist)
 385 {
 386         int64_t maxseq;
 387         int64_t newseq;
 388         struct prefix_list_entry *pentry;
 389
 390         maxseq = newseq = 0;
 391
 392         for (pentry = plist->head; pentry; pentry = pentry->next) {
 393                 if (maxseq < pentry->seq)
 394                         maxseq = pentry->seq;
 395         }
 396
 397         newseq = ((maxseq / 5) * 5) + 5;
 398
 399         return newseq;
 400 }
 401
 402 /* Return prefix list entry which has same seq number. */
 403 static struct prefix_list_entry *prefix_seq_check(struct prefix_list *plist,
 404                                                   int64_t seq)
 405 {
 406         struct prefix_list_entry *pentry;
 407
 408         for (pentry = plist->head; pentry; pentry = pentry->next)
 409                 if (pentry->seq == seq)
 410                         return pentry;
 411         return NULL;
 412 }
 413
 414 static struct prefix_list_entry *
 415 prefix_list_entry_lookup(struct prefix_list *plist, struct prefix *prefix,
 416                          enum prefix_list_type type, int64_t seq,
 417                          int le, int ge)
 418 {
 419         struct prefix_list_entry *pentry;
 420
 421         for (pentry = plist->head; pentry; pentry = pentry->next)
 422                 if (prefix_same(&pentry->prefix, prefix)
 423                     && pentry->type == type) {
 424                         if (seq >= 0 && pentry->seq != seq)
 425                                 continue;
 426
 427                         if (pentry->le != le)
 428                                 continue;
 429                         if (pentry->ge != ge)
 430                                 continue;
 431
 432                         return pentry;
 433                 }
 434
 435         return NULL;
 436 }
 437
 438 static void trie_walk_affected(size_t validbits, struct pltrie_table *table,
 439                                uint8_t byte, struct prefix_list_entry *object,
 440                                void (*fn)(struct prefix_list_entry *object,
 441                                           struct prefix_list_entry **updptr))
 442 {
 443         uint8_t mask;
 444         uint16_t bwalk;
 445
 446         if (validbits > PLC_BITS) {
 447                 fn(object, &table->entries[byte].final_chain);
 448                 return;
 449         }
 450
 451         mask = (1 << (8 - validbits)) - 1;
 452         for (bwalk = byte & ~mask; bwalk <= byte + mask; bwalk++) {
 453                 fn(object, &table->entries[bwalk].up_chain);
 454         }
 455 }
 456
 457 static void trie_uninstall_fn(struct prefix_list_entry *object,
 458                               struct prefix_list_entry **updptr)
 459 {
 460         for (; *updptr; updptr = &(*updptr)->next_best)
 461                 if (*updptr == object) {
 462                         *updptr = object->next_best;
 463                         break;
 464                 }
 465 }
 466
 467 static int trie_table_empty(struct pltrie_table *table)
 468 {
 469         size_t i;
 470         for (i = 0; i < PLC_LEN; i++)
 471                 if (table->entries[i].next_table || table->entries[i].up_chain)
 472                         return 0;
 473         return 1;
 474 }
 475
 476 static void prefix_list_trie_del(struct prefix_list *plist,
 477                                  struct prefix_list_entry *pentry)
 478 {
 479         size_t depth, maxdepth = plist->master->trie_depth;
 480         uint8_t *bytes = &pentry->prefix.u.prefix;
 481         size_t validbits = pentry->prefix.prefixlen;
 482         struct pltrie_table *table, **tables[PLC_MAXLEVEL];
 483
 484         table = plist->trie;
 485         for (depth = 0; validbits > PLC_BITS && depth < maxdepth - 1; depth++) {
 486                 uint8_t byte = bytes[depth];
 487                 assert(table->entries[byte].next_table);
 488
 489                 tables[depth + 1] = &table->entries[byte].next_table;
 490                 table = table->entries[byte].next_table;
 491
 492                 validbits -= PLC_BITS;
 493         }
 494
 495         trie_walk_affected(validbits, table, bytes[depth], pentry,
 496                            trie_uninstall_fn);
 497
 498         for (; depth > 0; depth--)
 499                 if (trie_table_empty(*tables[depth])) {
 500                         XFREE(MTYPE_PREFIX_LIST_TRIE, *tables[depth]);
 501                         *tables[depth] = NULL;
 502                 }
 503 }
 504
 505
 506 static void prefix_list_entry_delete(struct prefix_list *plist,
 507                                      struct prefix_list_entry *pentry,
 508                                      int update_list)
 509 {
 510         if (plist == NULL || pentry == NULL)
 511                 return;
 512
 513         prefix_list_trie_del(plist, pentry);
 514
 515         if (pentry->prev)
 516                 pentry->prev->next = pentry->next;
 517         else
 518                 plist->head = pentry->next;
 519         if (pentry->next)
 520                 pentry->next->prev = pentry->prev;
 521         else
 522                 plist->tail = pentry->prev;
 523
 524         prefix_list_entry_free(pentry);
 525
 526         plist->count--;
 527
 528         if (update_list) {
 529                 route_map_notify_dependencies(plist->name,
 530                                               RMAP_EVENT_PLIST_DELETED);
 531                 if (plist->master->delete_hook)
 532                         (*plist->master->delete_hook)(plist);
 533
 534                 if (plist->head == NULL && plist->tail == NULL
 535                     && plist->desc == NULL)
 536                         prefix_list_delete(plist);
 537                 else
 538                         plist->master->recent = plist;
 539         }
 540 }
 541
 542 static void trie_install_fn(struct prefix_list_entry *object,
 543                             struct prefix_list_entry **updptr)
 544 {
 545         while (*updptr) {
 546                 if (*updptr == object)
 547                         return;
 548                 if ((*updptr)->prefix.prefixlen < object->prefix.prefixlen)
 549                         break;
 550                 if ((*updptr)->prefix.prefixlen == object->prefix.prefixlen
 551                     && (*updptr)->seq > object->seq)
 552                         break;
 553                 updptr = &(*updptr)->next_best;
 554         }
 555
 556         if (!object->next_best)
 557                 object->next_best = *updptr;
 558         else
 559                 assert(object->next_best == *updptr || !*updptr);
 560
 561         *updptr = object;
 562 }
 563
 564 static void prefix_list_trie_add(struct prefix_list *plist,
 565                                  struct prefix_list_entry *pentry)
 566 {
 567         size_t depth = plist->master->trie_depth;
 568         uint8_t *bytes = &pentry->prefix.u.prefix;
 569         size_t validbits = pentry->prefix.prefixlen;
 570         struct pltrie_table *table;
 571
 572         table = plist->trie;
 573         while (validbits > PLC_BITS && depth > 1) {
 574                 if (!table->entries[*bytes].next_table)
 575                         table->entries[*bytes].next_table =
 576                                 XCALLOC(MTYPE_PREFIX_LIST_TRIE,
 577                                         sizeof(struct pltrie_table));
 578                 table = table->entries[*bytes].next_table;
 579                 bytes++;
 580                 depth--;
 581                 validbits -= PLC_BITS;
 582         }
 583
 584         trie_walk_affected(validbits, table, *bytes, pentry, trie_install_fn);
 585 }
 586
 587 static void prefix_list_entry_add(struct prefix_list *plist,
 588                                   struct prefix_list_entry *pentry)
 589 {
 590         struct prefix_list_entry *replace;
 591         struct prefix_list_entry *point;
 592
 593         /* Automatic asignment of seq no. */
 594         if (pentry->seq == -1)
 595                 pentry->seq = prefix_new_seq_get(plist);
 596
 597         if (plist->tail && pentry->seq > plist->tail->seq)
 598                 point = NULL;
 599         else {
 600                 /* Is there any same seq prefix list entry? */
 601                 replace = prefix_seq_check(plist, pentry->seq);
 602                 if (replace)
 603                         prefix_list_entry_delete(plist, replace, 0);
 604
 605                 /* Check insert point. */
 606                 for (point = plist->head; point; point = point->next)
 607                         if (point->seq >= pentry->seq)
 608                                 break;
 609         }
 610
 611         /* In case of this is the first element of the list. */
 612         pentry->next = point;
 613
 614         if (point) {
 615                 if (point->prev)
 616                         point->prev->next = pentry;
 617                 else
 618                         plist->head = pentry;
 619
 620                 pentry->prev = point->prev;
 621                 point->prev = pentry;
 622         } else {
 623                 if (plist->tail)
 624                         plist->tail->next = pentry;
 625                 else
 626                         plist->head = pentry;
 627
 628                 pentry->prev = plist->tail;
 629                 plist->tail = pentry;
 630         }
 631
 632         prefix_list_trie_add(plist, pentry);
 633
 634         /* Increment count. */
 635         plist->count++;
 636
 637         /* Run hook function. */
 638         if (plist->master->add_hook)
 639                 (*plist->master->add_hook)(plist);
 640
 641         route_map_notify_dependencies(plist->name, RMAP_EVENT_PLIST_ADDED);
 642         plist->master->recent = plist;
 643 }
 644
 645 /* Return string of prefix_list_type. */
 646 static const char *prefix_list_type_str(struct prefix_list_entry *pentry)
 647 {
 648         switch (pentry->type) {
 649         case PREFIX_PERMIT:
 650                 return "permit";
 651         case PREFIX_DENY:
 652                 return "deny";
 653         default:
 654                 return "";
 655         }
 656 }
 657
 658 static int prefix_list_entry_match(struct prefix_list_entry *pentry,
 659                                    struct prefix *p)
 660 {
 661         int ret;
 662
 663         if (pentry->prefix.family != p->family)
 664                 return 0;
 665
 666         ret = prefix_match(&pentry->prefix, p);
 667         if (!ret)
 668                 return 0;
 669
 670         /* In case of le nor ge is specified, exact match is performed. */
 671         if (!pentry->le && !pentry->ge) {
 672                 if (pentry->prefix.prefixlen != p->prefixlen)
 673                         return 0;
 674         } else {
 675                 if (pentry->le)
 676                         if (p->prefixlen > pentry->le)
 677                                 return 0;
 678
 679                 if (pentry->ge)
 680                         if (p->prefixlen < pentry->ge)
 681                                 return 0;
 682         }
 683         return 1;
 684 }
 685
 686 enum prefix_list_type prefix_list_apply_which_prefix(struct prefix_list *plist,
 687                                                      struct prefix **which,
 688                                                      void *object)
 689 {
 690         struct prefix_list_entry *pentry, *pbest = NULL;
 691
 692         struct prefix *p = (struct prefix *)object;
 693         uint8_t *byte = &p->u.prefix;
 694         size_t depth;
 695         size_t validbits = p->prefixlen;
 696         struct pltrie_table *table;
 697
 698         if (plist == NULL) {
 699                 if (which)
 700                         *which = NULL;
 701                 return PREFIX_DENY;
 702         }
 703
 704         if (plist->count == 0) {
 705                 if (which)
 706                         *which = NULL;
 707                 return PREFIX_PERMIT;
 708         }
 709
 710         depth = plist->master->trie_depth;
 711         table = plist->trie;
 712         while (1) {
 713                 for (pentry = table->entries[*byte].up_chain; pentry;
 714                      pentry = pentry->next_best) {
 715                         if (pbest && pbest->seq < pentry->seq)
 716                                 continue;
 717                         if (prefix_list_entry_match(pentry, p))
 718                                 pbest = pentry;
 719                 }
 720
 721                 if (validbits <= PLC_BITS)
 722                         break;
 723                 validbits -= PLC_BITS;
 724
 725                 if (--depth) {
 726                         if (!table->entries[*byte].next_table)
 727                                 break;
 728
 729                         table = table->entries[*byte].next_table;
 730                         byte++;
 731                         continue;
 732                 }
 733
 734                 for (pentry = table->entries[*byte].final_chain; pentry;
 735                      pentry = pentry->next_best) {
 736                         if (pbest && pbest->seq < pentry->seq)
 737                                 continue;
 738                         if (prefix_list_entry_match(pentry, p))
 739                                 pbest = pentry;
 740                 }
 741                 break;
 742         }
 743
 744         if (which) {
 745                 if (pbest)
 746                         *which = &pbest->prefix;
 747                 else
 748                         *which = NULL;
 749         }
 750
 751         if (pbest == NULL)
 752                 return PREFIX_DENY;
 753
 754         return pbest->type;
 755 }
 756
 757 static void __attribute__((unused)) prefix_list_print(struct prefix_list *plist)
 758 {
 759         struct prefix_list_entry *pentry;
 760
 761         if (plist == NULL)
 762                 return;
 763
 764         printf("ip prefix-list %s: %d entries\n", plist->name, plist->count);
 765
 766         for (pentry = plist->head; pentry; pentry = pentry->next) {
 767                 if (pentry->any)
 768                         printf("any %s\n", prefix_list_type_str(pentry));
 769                 else {
 770                         struct prefix *p;
 771                         char buf[BUFSIZ];
 772
 773                         p = &pentry->prefix;
 774
 775                         printf("  seq %" PRId64 " %s %s/%d", pentry->seq,
 776                                prefix_list_type_str(pentry),
 777                                inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ),
 778                                p->prefixlen);
 779                         if (pentry->ge)
 780                                 printf(" ge %d", pentry->ge);
 781                         if (pentry->le)
 782                                 printf(" le %d", pentry->le);
 783                         printf("\n");
 784                 }
 785         }
 786 }
 787
 788 /* Retrun 1 when plist already include pentry policy. */
 789 static struct prefix_list_entry *
 790 prefix_entry_dup_check(struct prefix_list *plist, struct prefix_list_entry *new)
 791 {
 792         size_t depth, maxdepth = plist->master->trie_depth;
 793         uint8_t byte, *bytes = &new->prefix.u.prefix;
 794         size_t validbits = new->prefix.prefixlen;
 795         struct pltrie_table *table;
 796         struct prefix_list_entry *pentry;
 797         int64_t seq = 0;
 798
 799         if (new->seq == -1)
 800                 seq = prefix_new_seq_get(plist);
 801         else
 802                 seq = new->seq;
 803
 804         table = plist->trie;
 805         for (depth = 0; validbits > PLC_BITS && depth < maxdepth - 1; depth++) {
 806                 byte = bytes[depth];
 807                 if (!table->entries[byte].next_table)
 808                         return NULL;
 809
 810                 table = table->entries[byte].next_table;
 811                 validbits -= PLC_BITS;
 812         }
 813
 814         byte = bytes[depth];
 815         if (validbits > PLC_BITS)
 816                 pentry = table->entries[byte].final_chain;
 817         else
 818                 pentry = table->entries[byte].up_chain;
 819
 820         for (; pentry; pentry = pentry->next_best) {
 821                 if (prefix_same(&pentry->prefix, &new->prefix)
 822                     && pentry->type == new->type && pentry->le == new->le
 823                     && pentry->ge == new->ge && pentry->seq != seq)
 824                         return pentry;
 825         }
 826         return NULL;
 827 }
 828
 829 static int vty_invalid_prefix_range(struct vty *vty, const char *prefix)
 830 {
 831         vty_out(vty,
 832                 "%% Invalid prefix range for %s, make sure: len < ge-value <= le-value\n",
 833                 prefix);
 834         return CMD_WARNING_CONFIG_FAILED;
 835 }
 836
 837 static int vty_prefix_list_install(struct vty *vty, afi_t afi, const char *name,
 838                                    const char *seq, const char *typestr,
 839                                    const char *prefix, const char *ge,
 840                                    const char *le)
 841 {
 842         int ret;
 843         enum prefix_list_type type;
 844         struct prefix_list *plist;
 845         struct prefix_list_entry *pentry;
 846         struct prefix_list_entry *dup;
 847         struct prefix p, p_tmp;
 848         int any = 0;
 849         int64_t seqnum = -1;
 850         int lenum = 0;
 851         int genum = 0;
 852
 853         /* Sequential number. */
 854         if (seq)
 855                 seqnum = (int64_t)atol(seq);
 856
 857         /* ge and le number */
 858         if (ge)
 859                 genum = atoi(ge);
 860         if (le)
 861                 lenum = atoi(le);
 862
 863         /* Check filter type. */
 864         if (strncmp("permit", typestr, 1) == 0)
 865                 type = PREFIX_PERMIT;
 866         else if (strncmp("deny", typestr, 1) == 0)
 867                 type = PREFIX_DENY;
 868         else {
 869                 vty_out(vty, "%% prefix type must be permit or deny\n");
 870                 return CMD_WARNING_CONFIG_FAILED;
 871         }
 872
 873         /* "any" is special token for matching any IPv4 addresses.  */
 874         switch (afi) {
 875         case AFI_IP:
 876                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
 877                         ret = str2prefix_ipv4("0.0.0.0/0",
 878                                               (struct prefix_ipv4 *)&p);
 879                         genum = 0;
 880                         lenum = IPV4_MAX_BITLEN;
 881                         any = 1;
 882                 } else
 883                         ret = str2prefix_ipv4(prefix, (struct prefix_ipv4 *)&p);
 884
 885                 if (ret <= 0) {
 886                         vty_out(vty, "%% Malformed IPv4 prefix\n");
 887                         return CMD_WARNING_CONFIG_FAILED;
 888                 }
 889
 890                 /* make a copy to verify prefix matches mask length */
 891                 prefix_copy(&p_tmp, &p);
 892                 apply_mask_ipv4((struct prefix_ipv4 *)&p_tmp);
 893
 894                 break;
 895         case AFI_IP6:
 896                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
 897                         ret = str2prefix_ipv6("::/0", (struct prefix_ipv6 *)&p);
 898                         genum = 0;
 899                         lenum = IPV6_MAX_BITLEN;
 900                         any = 1;
 901                 } else
 902                         ret = str2prefix_ipv6(prefix, (struct prefix_ipv6 *)&p);
 903
 904                 if (ret <= 0) {
 905                         vty_out(vty, "%% Malformed IPv6 prefix\n");
 906                         return CMD_WARNING_CONFIG_FAILED;
 907                 }
 908
 909                 /* make a copy to verify prefix matches mask length */
 910                 prefix_copy(&p_tmp, &p);
 911                 apply_mask_ipv6((struct prefix_ipv6 *)&p_tmp);
 912
 913                 break;
 914         case AFI_L2VPN:
 915         default:
 916                 vty_out(vty, "%% Unrecognized AFI (%d)\n", afi);
 917                 return CMD_WARNING_CONFIG_FAILED;
 918                 break;
 919         }
 920
 921         /* If prefix has bits not under the mask, adjust it to fit */
 922         if (!prefix_same(&p_tmp, &p)) {
 923                 char buf[PREFIX2STR_BUFFER];
 924                 char buf_tmp[PREFIX2STR_BUFFER];
 925                 prefix2str(&p, buf, sizeof(buf));
 926                 prefix2str(&p_tmp, buf_tmp, sizeof(buf_tmp));
 927                 zlog_warn(
 928                         "Prefix-list %s prefix changed from %s to %s to match length",
 929                         name, buf, buf_tmp);
 930                 p = p_tmp;
 931         }
 932
 933         /* ge and le check. */
 934         if (genum && (genum <= p.prefixlen))
 935                 return vty_invalid_prefix_range(vty, prefix);
 936
 937         if (lenum && (lenum < p.prefixlen))
 938                 return vty_invalid_prefix_range(vty, prefix);
 939
 940         if (lenum && (genum > lenum))
 941                 return vty_invalid_prefix_range(vty, prefix);
 942
 943         if (genum && (lenum == (afi == AFI_IP ? 32 : 128)))
 944                 lenum = 0;
 945
 946         /* Get prefix_list with name. */
 947         plist = prefix_list_get(afi, 0, name);
 948
 949         /* Make prefix entry. */
 950         pentry = prefix_list_entry_make(&p, type, seqnum, lenum, genum, any);
 951
 952         /* Check same policy. */
 953         dup = prefix_entry_dup_check(plist, pentry);
 954
 955         if (dup) {
 956                 prefix_list_entry_free(pentry);
 957                 return CMD_SUCCESS;
 958         }
 959
 960         /* Install new filter to the access_list. */
 961         prefix_list_entry_add(plist, pentry);
 962
 963         return CMD_SUCCESS;
 964 }
 965
 966 static int vty_prefix_list_uninstall(struct vty *vty, afi_t afi,
 967                                      const char *name, const char *seq,
 968                                      const char *typestr, const char *prefix,
 969                                      const char *ge, const char *le)
 970 {
 971         int ret;
 972         enum prefix_list_type type;
 973         struct prefix_list *plist;
 974         struct prefix_list_entry *pentry;
 975         struct prefix p;
 976         int64_t seqnum = -1;
 977         int lenum = 0;
 978         int genum = 0;
 979
 980         /* Check prefix list name. */
 981         plist = prefix_list_lookup(afi, name);
 982         if (!plist) {
 983                 vty_out(vty, "%% Can't find specified prefix-list\n");
 984                 return CMD_WARNING_CONFIG_FAILED;
 985         }
 986
 987         /* Only prefix-list name specified, delete the entire prefix-list. */
 988         if (seq == NULL && typestr == NULL && prefix == NULL && ge == NULL
 989             && le == NULL) {
 990                 prefix_list_delete(plist);
 991                 return CMD_SUCCESS;
 992         }
 993
 994         /* We must have, at a minimum, both the type and prefix here */
 995         if ((typestr == NULL) || (prefix == NULL)) {
 996                 vty_out(vty, "%% Both prefix and type required\n");
 997                 return CMD_WARNING_CONFIG_FAILED;
 998         }
 999
1000         /* Check sequence number. */
1001         if (seq)
1002                 seqnum = (int64_t)atol(seq);
1003
1004         /* ge and le number */
1005         if (ge)
1006                 genum = atoi(ge);
1007         if (le)
1008                 lenum = atoi(le);
1009
1010         /* Check of filter type. */
1011         if (strncmp("permit", typestr, 1) == 0)
1012                 type = PREFIX_PERMIT;
1013         else if (strncmp("deny", typestr, 1) == 0)
1014                 type = PREFIX_DENY;
1015         else {
1016                 vty_out(vty, "%% prefix type must be permit or deny\n");
1017                 return CMD_WARNING_CONFIG_FAILED;
1018         }
1019
1020         /* "any" is special token for matching any IPv4 addresses.  */
1021         if (afi == AFI_IP) {
1022                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
1023                         ret = str2prefix_ipv4("0.0.0.0/0",
1024                                               (struct prefix_ipv4 *)&p);
1025                         genum = 0;
1026                         lenum = IPV4_MAX_BITLEN;
1027                 } else
1028                         ret = str2prefix_ipv4(prefix, (struct prefix_ipv4 *)&p);
1029
1030                 if (ret <= 0) {
1031                         vty_out(vty, "%% Malformed IPv4 prefix\n");
1032                         return CMD_WARNING_CONFIG_FAILED;
1033                 }
1034         } else if (afi == AFI_IP6) {
1035                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
1036                         ret = str2prefix_ipv6("::/0", (struct prefix_ipv6 *)&p);
1037                         genum = 0;
1038                         lenum = IPV6_MAX_BITLEN;
1039                 } else
1040                         ret = str2prefix_ipv6(prefix, (struct prefix_ipv6 *)&p);
1041
1042                 if (ret <= 0) {
1043                         vty_out(vty, "%% Malformed IPv6 prefix\n");
1044                         return CMD_WARNING_CONFIG_FAILED;
1045                 }
1046         }
1047
1048         /* Lookup prefix entry. */
1049         pentry =
1050                 prefix_list_entry_lookup(plist, &p, type, seqnum, lenum, genum);
1051
1052         if (pentry == NULL) {
1053                 vty_out(vty, "%% Can't find specified prefix-list\n");
1054                 return CMD_WARNING_CONFIG_FAILED;
1055         }
1056
1057         /* Install new filter to the access_list. */
1058         prefix_list_entry_delete(plist, pentry, 1);
1059
1060         return CMD_SUCCESS;
1061 }
1062
1063 static int vty_prefix_list_desc_unset(struct vty *vty, afi_t afi,
1064                                       const char *name)
1065 {
1066         struct prefix_list *plist;
1067
1068         plist = prefix_list_lookup(afi, name);
1069         if (!plist) {
1070                 vty_out(vty, "%% Can't find specified prefix-list\n");
1071                 return CMD_WARNING_CONFIG_FAILED;
1072         }
1073
1074         if (plist->desc) {
1075                 XFREE(MTYPE_TMP, plist->desc);
1076                 plist->desc = NULL;
1077         }
1078
1079         if (plist->head == NULL && plist->tail == NULL && plist->desc == NULL)
1080                 prefix_list_delete(plist);
1081
1082         return CMD_SUCCESS;
1083 }
1084
1085 enum display_type {
1086         normal_display,
1087         summary_display,
1088         detail_display,
1089         sequential_display,
1090         longer_display,
1091         first_match_display
1092 };
1093
1094 static void vty_show_prefix_entry(struct vty *vty, afi_t afi,
1095                                   struct prefix_list *plist,
1096                                   struct prefix_master *master,
1097                                   enum display_type dtype, int seqnum)
1098 {
1099         struct prefix_list_entry *pentry;
1100
1101         /* Print the name of the protocol */
1102         vty_out(vty, "%s: ", frr_protoname);
1103
1104         if (dtype == normal_display) {
1105                 vty_out(vty, "ip%s prefix-list %s: %d entries\n",
1106                         afi == AFI_IP ? "" : "v6", plist->name, plist->count);
1107                 if (plist->desc)
1108                         vty_out(vty, "   Description: %s\n", plist->desc);
1109         } else if (dtype == summary_display || dtype == detail_display) {
1110                 vty_out(vty, "ip%s prefix-list %s:\n",
1111                         afi == AFI_IP ? "" : "v6", plist->name);
1112
1113                 if (plist->desc)
1114                         vty_out(vty, "   Description: %s\n", plist->desc);
1115
1116                 vty_out(vty,
1117                         "   count: %d, range entries: %d, sequences: %" PRId64 " - %" PRId64 "\n",
1118                         plist->count, plist->rangecount,
1119                         plist->head ? plist->head->seq : 0,
1120                         plist->tail ? plist->tail->seq : 0);
1121         }
1122
1123         if (dtype != summary_display) {
1124                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1125                         if (dtype == sequential_display
1126                             && pentry->seq != seqnum)
1127                                 continue;
1128
1129                         vty_out(vty, "   ");
1130
1131                         if (master->seqnum)
1132                                 vty_out(vty, "seq %" PRId64 " ", pentry->seq);
1133
1134                         vty_out(vty, "%s ", prefix_list_type_str(pentry));
1135
1136                         if (pentry->any)
1137                                 vty_out(vty, "any");
1138                         else {
1139                                 struct prefix *p = &pentry->prefix;
1140                                 char buf[BUFSIZ];
1141
1142                                 vty_out(vty, "%s/%d",
1143                                         inet_ntop(p->family, &p->u.prefix, buf,
1144                                                   BUFSIZ),
1145                                         p->prefixlen);
1146
1147                                 if (pentry->ge)
1148                                         vty_out(vty, " ge %d", pentry->ge);
1149                                 if (pentry->le)
1150                                         vty_out(vty, " le %d", pentry->le);
1151                         }
1152
1153                         if (dtype == detail_display
1154                             || dtype == sequential_display)
1155                                 vty_out(vty, " (hit count: %ld, refcount: %ld)",
1156                                         pentry->hitcnt, pentry->refcnt);
1157
1158                         vty_out(vty, "\n");
1159                 }
1160         }
1161 }
1162
1163 static int vty_show_prefix_list(struct vty *vty, afi_t afi, const char *name,
1164                                 const char *seq, enum display_type dtype)
1165 {
1166         struct prefix_list *plist;
1167         struct prefix_master *master;
1168         int64_t seqnum = 0;
1169
1170         master = prefix_master_get(afi, 0);
1171         if (master == NULL)
1172                 return CMD_WARNING;
1173
1174         if (seq)
1175                 seqnum = (int64_t)atol(seq);
1176
1177         if (name) {
1178                 plist = prefix_list_lookup(afi, name);
1179                 if (!plist) {
1180                         vty_out(vty, "%% Can't find specified prefix-list\n");
1181                         return CMD_WARNING;
1182                 }
1183                 vty_show_prefix_entry(vty, afi, plist, master, dtype, seqnum);
1184         } else {
1185                 if (dtype == detail_display || dtype == summary_display) {
1186                         if (master->recent)
1187                                 vty_out(vty,
1188                                         "Prefix-list with the last deletion/insertion: %s\n",
1189                                         master->recent->name);
1190                 }
1191
1192                 for (plist = master->num.head; plist; plist = plist->next)
1193                         vty_show_prefix_entry(vty, afi, plist, master, dtype,
1194                                               seqnum);
1195
1196                 for (plist = master->str.head; plist; plist = plist->next)
1197                         vty_show_prefix_entry(vty, afi, plist, master, dtype,
1198                                               seqnum);
1199         }
1200
1201         return CMD_SUCCESS;
1202 }
1203
1204 static int vty_show_prefix_list_prefix(struct vty *vty, afi_t afi,
1205                                        const char *name, const char *prefix,
1206                                        enum display_type type)
1207 {
1208         struct prefix_list *plist;
1209         struct prefix_list_entry *pentry;
1210         struct prefix p;
1211         int ret;
1212         int match;
1213
1214         plist = prefix_list_lookup(afi, name);
1215         if (!plist) {
1216                 vty_out(vty, "%% Can't find specified prefix-list\n");
1217                 return CMD_WARNING;
1218         }
1219
1220         ret = str2prefix(prefix, &p);
1221         if (ret <= 0) {
1222                 vty_out(vty, "%% prefix is malformed\n");
1223                 return CMD_WARNING;
1224         }
1225
1226         for (pentry = plist->head; pentry; pentry = pentry->next) {
1227                 match = 0;
1228
1229                 if (type == normal_display || type == first_match_display)
1230                         if (prefix_same(&p, &pentry->prefix))
1231                                 match = 1;
1232
1233                 if (type == longer_display) {
1234                         if ((p.family == pentry->prefix.family)
1235                             && (prefix_match(&p, &pentry->prefix)))
1236                                 match = 1;
1237                 }
1238
1239                 if (match) {
1240                         vty_out(vty, "   seq %" PRId64 " %s ", pentry->seq,
1241                                 prefix_list_type_str(pentry));
1242
1243                         if (pentry->any)
1244                                 vty_out(vty, "any");
1245                         else {
1246                                 struct prefix *p = &pentry->prefix;
1247                                 char buf[BUFSIZ];
1248
1249                                 vty_out(vty, "%s/%d",
1250                                         inet_ntop(p->family, &p->u.prefix, buf,
1251                                                   BUFSIZ),
1252                                         p->prefixlen);
1253
1254                                 if (pentry->ge)
1255                                         vty_out(vty, " ge %d", pentry->ge);
1256                                 if (pentry->le)
1257                                         vty_out(vty, " le %d", pentry->le);
1258                         }
1259
1260                         if (type == normal_display
1261                             || type == first_match_display)
1262                                 vty_out(vty, " (hit count: %ld, refcount: %ld)",
1263                                         pentry->hitcnt, pentry->refcnt);
1264
1265                         vty_out(vty, "\n");
1266
1267                         if (type == first_match_display)
1268                                 return CMD_SUCCESS;
1269                 }
1270         }
1271         return CMD_SUCCESS;
1272 }
1273
1274 static int vty_clear_prefix_list(struct vty *vty, afi_t afi, const char *name,
1275                                  const char *prefix)
1276 {
1277         struct prefix_master *master;
1278         struct prefix_list *plist;
1279         struct prefix_list_entry *pentry;
1280         int ret;
1281         struct prefix p;
1282
1283         master = prefix_master_get(afi, 0);
1284         if (master == NULL)
1285                 return CMD_WARNING;
1286
1287         if (name == NULL && prefix == NULL) {
1288                 for (plist = master->num.head; plist; plist = plist->next)
1289                         for (pentry = plist->head; pentry;
1290                              pentry = pentry->next)
1291                                 pentry->hitcnt = 0;
1292
1293                 for (plist = master->str.head; plist; plist = plist->next)
1294                         for (pentry = plist->head; pentry;
1295                              pentry = pentry->next)
1296                                 pentry->hitcnt = 0;
1297         } else {
1298                 plist = prefix_list_lookup(afi, name);
1299                 if (!plist) {
1300                         vty_out(vty, "%% Can't find specified prefix-list\n");
1301                         return CMD_WARNING;
1302                 }
1303
1304                 if (prefix) {
1305                         ret = str2prefix(prefix, &p);
1306                         if (ret <= 0) {
1307                                 vty_out(vty, "%% prefix is malformed\n");
1308                                 return CMD_WARNING;
1309                         }
1310                 }
1311
1312                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1313                         if (prefix) {
1314                                 if (pentry->prefix.family == p.family
1315                                     && prefix_match(&pentry->prefix, &p))
1316                                         pentry->hitcnt = 0;
1317                         } else
1318                                 pentry->hitcnt = 0;
1319                 }
1320         }
1321         return CMD_SUCCESS;
1322 }
1323
1324 #ifndef VTYSH_EXTRACT_PL
1325 #include "lib/plist_clippy.c"
1326 #endif
1327
1328 DEFPY (ip_prefix_list,
1329        ip_prefix_list_cmd,
1330        "ip prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|A.B.C.D/M$dest [{ge (0-32)|le (0-32)}]>",
1331        IP_STR
1332        PREFIX_LIST_STR
1333        "Name of a prefix list\n"
1334        "sequence number of an entry\n"
1335        "Sequence number\n"
1336        "Specify packets to reject\n"
1337        "Specify packets to forward\n"
1338        "Any prefix match.  Same as \"0.0.0.0/0 le 32\"\n"
1339        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1340        "Minimum prefix length to be matched\n"
1341        "Minimum prefix length\n"
1342        "Maximum prefix length to be matched\n"
1343        "Maximum prefix length\n")
1344 {
1345         return vty_prefix_list_install(vty, AFI_IP, prefix_list, seq_str,
1346                                        action, dest, ge_str, le_str);
1347 }
1348
1349 DEFPY (no_ip_prefix_list,
1350        no_ip_prefix_list_cmd,
1351        "no ip prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|A.B.C.D/M$dest [{ge (0-32)|le (0-32)}]>",
1352        NO_STR
1353        IP_STR
1354        PREFIX_LIST_STR
1355        "Name of a prefix list\n"
1356        "sequence number of an entry\n"
1357        "Sequence number\n"
1358        "Specify packets to reject\n"
1359        "Specify packets to forward\n"
1360        "Any prefix match.  Same as \"0.0.0.0/0 le 32\"\n"
1361        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1362        "Minimum prefix length to be matched\n"
1363        "Minimum prefix length\n"
1364        "Maximum prefix length to be matched\n"
1365        "Maximum prefix length\n")
1366 {
1367         return vty_prefix_list_uninstall(vty, AFI_IP, prefix_list, seq_str,
1368                                          action, dest, ge_str, le_str);
1369 }
1370
1371 DEFPY (no_ip_prefix_list_all,
1372        no_ip_prefix_list_all_cmd,
1373        "no ip prefix-list WORD",
1374        NO_STR
1375        IP_STR
1376        PREFIX_LIST_STR
1377        "Name of a prefix list\n")
1378 {
1379         return vty_prefix_list_uninstall(vty, AFI_IP, prefix_list, NULL, NULL,
1380                                          NULL, NULL, NULL);
1381 }
1382
1383 DEFPY (ip_prefix_list_sequence_number,
1384        ip_prefix_list_sequence_number_cmd,
1385        "[no] ip prefix-list sequence-number",
1386        NO_STR
1387        IP_STR
1388        PREFIX_LIST_STR
1389        "Include/exclude sequence numbers in NVGEN\n")
1390 {
1391         prefix_master_ipv4.seqnum = no ? false : true;
1392         return CMD_SUCCESS;
1393 }
1394
1395 DEFUN (ip_prefix_list_description,
1396        ip_prefix_list_description_cmd,
1397        "ip prefix-list WORD description LINE...",
1398        IP_STR
1399        PREFIX_LIST_STR
1400        "Name of a prefix list\n"
1401        "Prefix-list specific description\n"
1402        "Up to 80 characters describing this prefix-list\n")
1403 {
1404         int idx_word = 2;
1405         int idx_line = 4;
1406         struct prefix_list *plist;
1407
1408         plist = prefix_list_get(AFI_IP, 0, argv[idx_word]->arg);
1409
1410         if (plist->desc) {
1411                 XFREE(MTYPE_TMP, plist->desc);
1412                 plist->desc = NULL;
1413         }
1414         plist->desc = argv_concat(argv, argc, idx_line);
1415
1416         return CMD_SUCCESS;
1417 }
1418
1419 DEFUN (no_ip_prefix_list_description,
1420        no_ip_prefix_list_description_cmd,
1421        "no ip prefix-list WORD description",
1422        NO_STR
1423        IP_STR
1424        PREFIX_LIST_STR
1425        "Name of a prefix list\n"
1426        "Prefix-list specific description\n")
1427 {
1428         int idx_word = 3;
1429         return vty_prefix_list_desc_unset(vty, AFI_IP, argv[idx_word]->arg);
1430 }
1431
1432 /* ALIAS_FIXME */
1433 DEFUN (no_ip_prefix_list_description_comment,
1434        no_ip_prefix_list_description_comment_cmd,
1435        "no ip prefix-list WORD description LINE...",
1436        NO_STR
1437        IP_STR
1438        PREFIX_LIST_STR
1439        "Name of a prefix list\n"
1440        "Prefix-list specific description\n"
1441        "Up to 80 characters describing this prefix-list\n")
1442 {
1443         return no_ip_prefix_list_description(self, vty, argc, argv);
1444 }
1445
1446 DEFPY (show_ip_prefix_list,
1447        show_ip_prefix_list_cmd,
1448        "show ip prefix-list [WORD [seq$dseq (1-4294967295)$arg]]",
1449        SHOW_STR
1450        IP_STR
1451        PREFIX_LIST_STR
1452        "Name of a prefix list\n"
1453        "sequence number of an entry\n"
1454        "Sequence number\n")
1455 {
1456         enum display_type dtype = normal_display;
1457         if (dseq)
1458                 dtype = sequential_display;
1459
1460         return vty_show_prefix_list(vty, AFI_IP, prefix_list, arg_str, dtype);
1461 }
1462
1463 DEFPY (show_ip_prefix_list_prefix,
1464        show_ip_prefix_list_prefix_cmd,
1465        "show ip prefix-list WORD A.B.C.D/M$prefix [longer$dl|first-match$dfm]",
1466        SHOW_STR
1467        IP_STR
1468        PREFIX_LIST_STR
1469        "Name of a prefix list\n"
1470        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1471        "Lookup longer prefix\n"
1472        "First matched prefix\n")
1473 {
1474         enum display_type dtype = normal_display;
1475         if (dl)
1476                 dtype = longer_display;
1477         else if (dfm)
1478                 dtype = first_match_display;
1479
1480         return vty_show_prefix_list_prefix(vty, AFI_IP, prefix_list, prefix_str,
1481                                            dtype);
1482 }
1483
1484 DEFPY (show_ip_prefix_list_summary,
1485        show_ip_prefix_list_summary_cmd,
1486        "show ip prefix-list summary [WORD$prefix_list]",
1487        SHOW_STR
1488        IP_STR
1489        PREFIX_LIST_STR
1490        "Summary of prefix lists\n"
1491        "Name of a prefix list\n")
1492 {
1493         return vty_show_prefix_list(vty, AFI_IP, prefix_list, NULL,
1494                                     summary_display);
1495 }
1496
1497 DEFPY (show_ip_prefix_list_detail,
1498        show_ip_prefix_list_detail_cmd,
1499        "show ip prefix-list detail [WORD$prefix_list]",
1500        SHOW_STR
1501        IP_STR
1502        PREFIX_LIST_STR
1503        "Detail of prefix lists\n"
1504        "Name of a prefix list\n")
1505 {
1506         return vty_show_prefix_list(vty, AFI_IP, prefix_list, NULL,
1507                                     detail_display);
1508 }
1509
1510 DEFPY (clear_ip_prefix_list,
1511        clear_ip_prefix_list_cmd,
1512        "clear ip prefix-list [WORD [A.B.C.D/M$prefix]]",
1513        CLEAR_STR
1514        IP_STR
1515        PREFIX_LIST_STR
1516        "Name of a prefix list\n"
1517        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n")
1518 {
1519         return vty_clear_prefix_list(vty, AFI_IP, prefix_list, prefix_str);
1520 }
1521
1522 DEFPY (ipv6_prefix_list,
1523        ipv6_prefix_list_cmd,
1524        "ipv6 prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|X:X::X:X/M$dest [{ge (0-128)|le (0-128)}]>",
1525        IPV6_STR
1526        PREFIX_LIST_STR
1527        "Name of a prefix list\n"
1528        "sequence number of an entry\n"
1529        "Sequence number\n"
1530        "Specify packets to reject\n"
1531        "Specify packets to forward\n"
1532        "Any prefix match.  Same as \"::0/0 le 128\"\n"
1533        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1534        "Maximum prefix length to be matched\n"
1535        "Maximum prefix length\n"
1536        "Minimum prefix length to be matched\n"
1537        "Minimum prefix length\n")
1538 {
1539         return vty_prefix_list_install(vty, AFI_IP6, prefix_list, seq_str,
1540                                        action, dest, ge_str, le_str);
1541 }
1542
1543 DEFPY (no_ipv6_prefix_list,
1544        no_ipv6_prefix_list_cmd,
1545        "no ipv6 prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|X:X::X:X/M$dest [{ge (0-128)|le (0-128)}]>",
1546        NO_STR
1547        IPV6_STR
1548        PREFIX_LIST_STR
1549        "Name of a prefix list\n"
1550        "sequence number of an entry\n"
1551        "Sequence number\n"
1552        "Specify packets to reject\n"
1553        "Specify packets to forward\n"
1554        "Any prefix match.  Same as \"::0/0 le 128\"\n"
1555        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1556        "Maximum prefix length to be matched\n"
1557        "Maximum prefix length\n"
1558        "Minimum prefix length to be matched\n"
1559        "Minimum prefix length\n")
1560 {
1561         return vty_prefix_list_uninstall(vty, AFI_IP6, prefix_list, seq_str,
1562                                          action, dest, ge_str, le_str);
1563 }
1564
1565 DEFPY (no_ipv6_prefix_list_all,
1566        no_ipv6_prefix_list_all_cmd,
1567        "no ipv6 prefix-list WORD",
1568        NO_STR
1569        IPV6_STR
1570        PREFIX_LIST_STR
1571        "Name of a prefix list\n")
1572 {
1573         return vty_prefix_list_uninstall(vty, AFI_IP6, prefix_list, NULL, NULL,
1574                                          NULL, NULL, NULL);
1575 }
1576
1577 DEFPY (ipv6_prefix_list_sequence_number,
1578        ipv6_prefix_list_sequence_number_cmd,
1579        "[no] ipv6 prefix-list sequence-number",
1580        NO_STR
1581        IPV6_STR
1582        PREFIX_LIST_STR
1583        "Include/exclude sequence numbers in NVGEN\n")
1584 {
1585         prefix_master_ipv6.seqnum = no ? false : true;
1586         return CMD_SUCCESS;
1587 }
1588
1589 DEFUN (ipv6_prefix_list_description,
1590        ipv6_prefix_list_description_cmd,
1591        "ipv6 prefix-list WORD description LINE...",
1592        IPV6_STR
1593        PREFIX_LIST_STR
1594        "Name of a prefix list\n"
1595        "Prefix-list specific description\n"
1596        "Up to 80 characters describing this prefix-list\n")
1597 {
1598         int idx_word = 2;
1599         int iddx_line = 4;
1600         struct prefix_list *plist;
1601
1602         plist = prefix_list_get(AFI_IP6, 0, argv[idx_word]->arg);
1603
1604         if (plist->desc) {
1605                 XFREE(MTYPE_TMP, plist->desc);
1606                 plist->desc = NULL;
1607         }
1608         plist->desc = argv_concat(argv, argc, iddx_line);
1609
1610         return CMD_SUCCESS;
1611 }
1612
1613 DEFUN (no_ipv6_prefix_list_description,
1614        no_ipv6_prefix_list_description_cmd,
1615        "no ipv6 prefix-list WORD description",
1616        NO_STR
1617        IPV6_STR
1618        PREFIX_LIST_STR
1619        "Name of a prefix list\n"
1620        "Prefix-list specific description\n")
1621 {
1622         int idx_word = 3;
1623         return vty_prefix_list_desc_unset(vty, AFI_IP6, argv[idx_word]->arg);
1624 }
1625
1626 /* ALIAS_FIXME */
1627 DEFUN (no_ipv6_prefix_list_description_comment,
1628        no_ipv6_prefix_list_description_comment_cmd,
1629        "no ipv6 prefix-list WORD description LINE...",
1630        NO_STR
1631        IPV6_STR
1632        PREFIX_LIST_STR
1633        "Name of a prefix list\n"
1634        "Prefix-list specific description\n"
1635        "Up to 80 characters describing this prefix-list\n")
1636 {
1637         return no_ipv6_prefix_list_description(self, vty, argc, argv);
1638 }
1639
1640
1641 DEFPY (show_ipv6_prefix_list,
1642        show_ipv6_prefix_list_cmd,
1643        "show ipv6 prefix-list [WORD [seq$dseq (1-4294967295)$arg]]",
1644        SHOW_STR
1645        IPV6_STR
1646        PREFIX_LIST_STR
1647        "Name of a prefix list\n"
1648        "sequence number of an entry\n"
1649        "Sequence number\n")
1650 {
1651         enum display_type dtype = normal_display;
1652         if (dseq)
1653                 dtype = sequential_display;
1654
1655         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, arg_str, dtype);
1656 }
1657
1658 DEFPY (show_ipv6_prefix_list_prefix,
1659        show_ipv6_prefix_list_prefix_cmd,
1660        "show ipv6 prefix-list WORD X:X::X:X/M$prefix [longer$dl|first-match$dfm]",
1661        SHOW_STR
1662        IPV6_STR
1663        PREFIX_LIST_STR
1664        "Name of a prefix list\n"
1665        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1666        "Lookup longer prefix\n"
1667        "First matched prefix\n")
1668 {
1669         enum display_type dtype = normal_display;
1670         if (dl)
1671                 dtype = longer_display;
1672         else if (dfm)
1673                 dtype = first_match_display;
1674
1675         return vty_show_prefix_list_prefix(vty, AFI_IP6, prefix_list,
1676                                            prefix_str, dtype);
1677 }
1678
1679 DEFPY (show_ipv6_prefix_list_summary,
1680        show_ipv6_prefix_list_summary_cmd,
1681        "show ipv6 prefix-list summary [WORD$prefix-list]",
1682        SHOW_STR
1683        IPV6_STR
1684        PREFIX_LIST_STR
1685        "Summary of prefix lists\n"
1686        "Name of a prefix list\n")
1687 {
1688         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, NULL,
1689                                     summary_display);
1690 }
1691
1692 DEFPY (show_ipv6_prefix_list_detail,
1693        show_ipv6_prefix_list_detail_cmd,
1694        "show ipv6 prefix-list detail [WORD$prefix-list]",
1695        SHOW_STR
1696        IPV6_STR
1697        PREFIX_LIST_STR
1698        "Detail of prefix lists\n"
1699        "Name of a prefix list\n")
1700 {
1701         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, NULL,
1702                                     detail_display);
1703 }
1704
1705 DEFPY (clear_ipv6_prefix_list,
1706        clear_ipv6_prefix_list_cmd,
1707        "clear ipv6 prefix-list [WORD [X:X::X:X/M$prefix]]",
1708        CLEAR_STR
1709        IPV6_STR
1710        PREFIX_LIST_STR
1711        "Name of a prefix list\n"
1712        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n")
1713 {
1714         return vty_clear_prefix_list(vty, AFI_IP6, prefix_list, prefix_str);
1715 }
1716
1717 /* Configuration write function. */
1718 static int config_write_prefix_afi(afi_t afi, struct vty *vty)
1719 {
1720         struct prefix_list *plist;
1721         struct prefix_list_entry *pentry;
1722         struct prefix_master *master;
1723         int write = 0;
1724
1725         master = prefix_master_get(afi, 0);
1726         if (master == NULL)
1727                 return 0;
1728
1729         if (!master->seqnum) {
1730                 vty_out(vty, "no ip%s prefix-list sequence-number\n",
1731                         afi == AFI_IP ? "" : "v6");
1732                 vty_out(vty, "!\n");
1733         }
1734
1735         for (plist = master->num.head; plist; plist = plist->next) {
1736                 if (plist->desc) {
1737                         vty_out(vty, "ip%s prefix-list %s description %s\n",
1738                                 afi == AFI_IP ? "" : "v6", plist->name,
1739                                 plist->desc);
1740                         write++;
1741                 }
1742
1743                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1744                         vty_out(vty, "ip%s prefix-list %s ",
1745                                 afi == AFI_IP ? "" : "v6", plist->name);
1746
1747                         if (master->seqnum)
1748                                 vty_out(vty, "seq %" PRId64 " ", pentry->seq);
1749
1750                         vty_out(vty, "%s ", prefix_list_type_str(pentry));
1751
1752                         if (pentry->any)
1753                                 vty_out(vty, "any");
1754                         else {
1755                                 struct prefix *p = &pentry->prefix;
1756                                 char buf[BUFSIZ];
1757
1758                                 vty_out(vty, "%s/%d",
1759                                         inet_ntop(p->family, &p->u.prefix, buf,
1760                                                   BUFSIZ),
1761                                         p->prefixlen);
1762
1763                                 if (pentry->ge)
1764                                         vty_out(vty, " ge %d", pentry->ge);
1765                                 if (pentry->le)
1766                                         vty_out(vty, " le %d", pentry->le);
1767                         }
1768                         vty_out(vty, "\n");
1769                         write++;
1770                 }
1771                 /* vty_out (vty, "!\n"); */
1772         }
1773
1774         for (plist = master->str.head; plist; plist = plist->next) {
1775                 if (plist->desc) {
1776                         vty_out(vty, "ip%s prefix-list %s description %s\n",
1777                                 afi == AFI_IP ? "" : "v6", plist->name,
1778                                 plist->desc);
1779                         write++;
1780                 }
1781
1782                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1783                         vty_out(vty, "ip%s prefix-list %s ",
1784                                 afi == AFI_IP ? "" : "v6", plist->name);
1785
1786                         if (master->seqnum)
1787                                 vty_out(vty, "seq %" PRId64 " ", pentry->seq);
1788
1789                         vty_out(vty, "%s", prefix_list_type_str(pentry));
1790
1791                         if (pentry->any)
1792                                 vty_out(vty, " any");
1793                         else {
1794                                 struct prefix *p = &pentry->prefix;
1795                                 char buf[BUFSIZ];
1796
1797                                 vty_out(vty, " %s/%d",
1798                                         inet_ntop(p->family, &p->u.prefix, buf,
1799                                                   BUFSIZ),
1800                                         p->prefixlen);
1801
1802                                 if (pentry->ge)
1803                                         vty_out(vty, " ge %d", pentry->ge);
1804                                 if (pentry->le)
1805                                         vty_out(vty, " le %d", pentry->le);
1806                         }
1807                         vty_out(vty, "\n");
1808                         write++;
1809                 }
1810         }
1811
1812         return write;
1813 }
1814
1815 struct stream *prefix_bgp_orf_entry(struct stream *s, struct prefix_list *plist,
1816                                     uint8_t init_flag, uint8_t permit_flag,
1817                                     uint8_t deny_flag)
1818 {
1819         struct prefix_list_entry *pentry;
1820
1821         if (!plist)
1822                 return s;
1823
1824         for (pentry = plist->head; pentry; pentry = pentry->next) {
1825                 uint8_t flag = init_flag;
1826                 struct prefix *p = &pentry->prefix;
1827
1828                 flag |= (pentry->type == PREFIX_PERMIT ? permit_flag
1829                                                        : deny_flag);
1830                 stream_putc(s, flag);
1831                 stream_putl(s, (uint32_t)pentry->seq);
1832                 stream_putc(s, (uint8_t)pentry->ge);
1833                 stream_putc(s, (uint8_t)pentry->le);
1834                 stream_put_prefix(s, p);
1835         }
1836
1837         return s;
1838 }
1839
1840 int prefix_bgp_orf_set(char *name, afi_t afi, struct orf_prefix *orfp,
1841                        int permit, int set)
1842 {
1843         struct prefix_list *plist;
1844         struct prefix_list_entry *pentry;
1845
1846         /* ge and le value check */
1847         if (orfp->ge && orfp->ge <= orfp->p.prefixlen)
1848                 return CMD_WARNING_CONFIG_FAILED;
1849         if (orfp->le && orfp->le <= orfp->p.prefixlen)
1850                 return CMD_WARNING_CONFIG_FAILED;
1851         if (orfp->le && orfp->ge > orfp->le)
1852                 return CMD_WARNING_CONFIG_FAILED;
1853
1854         if (orfp->ge && orfp->le == (afi == AFI_IP ? 32 : 128))
1855                 orfp->le = 0;
1856
1857         plist = prefix_list_get(afi, 1, name);
1858         if (!plist)
1859                 return CMD_WARNING_CONFIG_FAILED;
1860
1861         if (set) {
1862                 pentry = prefix_list_entry_make(
1863                         &orfp->p, (permit ? PREFIX_PERMIT : PREFIX_DENY),
1864                         orfp->seq, orfp->le, orfp->ge, 0);
1865
1866                 if (prefix_entry_dup_check(plist, pentry)) {
1867                         prefix_list_entry_free(pentry);
1868                         return CMD_WARNING_CONFIG_FAILED;
1869                 }
1870
1871                 prefix_list_entry_add(plist, pentry);
1872         } else {
1873                 pentry = prefix_list_entry_lookup(
1874                         plist, &orfp->p, (permit ? PREFIX_PERMIT : PREFIX_DENY),
1875                         orfp->seq, orfp->le, orfp->ge);
1876
1877                 if (!pentry)
1878                         return CMD_WARNING_CONFIG_FAILED;
1879
1880                 prefix_list_entry_delete(plist, pentry, 1);
1881         }
1882
1883         return CMD_SUCCESS;
1884 }
1885
1886 void prefix_bgp_orf_remove_all(afi_t afi, char *name)
1887 {
1888         struct prefix_list *plist;
1889
1890         plist = prefix_bgp_orf_lookup(afi, name);
1891         if (plist)
1892                 prefix_list_delete(plist);
1893 }
1894
1895 /* return prefix count */
1896 int prefix_bgp_show_prefix_list(struct vty *vty, afi_t afi, char *name,
1897                                 uint8_t use_json)
1898 {
1899         struct prefix_list *plist;
1900         struct prefix_list_entry *pentry;
1901         json_object *json = NULL;
1902         json_object *json_prefix = NULL;
1903         json_object *json_list = NULL;
1904
1905         plist = prefix_bgp_orf_lookup(afi, name);
1906         if (!plist)
1907                 return 0;
1908
1909         if (!vty)
1910                 return plist->count;
1911
1912         if (use_json) {
1913                 json = json_object_new_object();
1914                 json_prefix = json_object_new_object();
1915                 json_list = json_object_new_object();
1916
1917                 json_object_int_add(json_prefix, "prefixListCounter",
1918                                     plist->count);
1919                 json_object_string_add(json_prefix, "prefixListName",
1920                                        plist->name);
1921
1922                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1923                         struct prefix *p = &pentry->prefix;
1924                         char buf_a[BUFSIZ];
1925                         char buf_b[BUFSIZ];
1926
1927                         sprintf(buf_a, "%s/%d",
1928                                 inet_ntop(p->family, &p->u.prefix, buf_b,
1929                                           BUFSIZ),
1930                                 p->prefixlen);
1931
1932                         json_object_int_add(json_list, "seq", pentry->seq);
1933                         json_object_string_add(json_list, "seqPrefixListType",
1934                                                prefix_list_type_str(pentry));
1935
1936                         if (pentry->ge)
1937                                 json_object_int_add(json_list, "ge",
1938                                                     pentry->ge);
1939                         if (pentry->le)
1940                                 json_object_int_add(json_list, "le",
1941                                                     pentry->le);
1942
1943                         json_object_object_add(json_prefix, buf_a, json_list);
1944                 }
1945                 if (afi == AFI_IP)
1946                         json_object_object_add(json, "ipPrefixList",
1947                                                json_prefix);
1948                 else
1949                         json_object_object_add(json, "ipv6PrefixList",
1950                                                json_prefix);
1951
1952                 vty_out(vty, "%s\n", json_object_to_json_string_ext(
1953                                              json, JSON_C_TO_STRING_PRETTY));
1954                 json_object_free(json);
1955         } else {
1956                 vty_out(vty, "ip%s prefix-list %s: %d entries\n",
1957                         afi == AFI_IP ? "" : "v6", plist->name, plist->count);
1958
1959                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1960                         struct prefix *p = &pentry->prefix;
1961                         char buf[BUFSIZ];
1962
1963                         vty_out(vty, "   seq %" PRId64 " %s %s/%d",
1964                                 pentry->seq,
1965                                 prefix_list_type_str(pentry),
1966                                 inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ),
1967                                 p->prefixlen);
1968
1969                         if (pentry->ge)
1970                                 vty_out(vty, " ge %d", pentry->ge);
1971                         if (pentry->le)
1972                                 vty_out(vty, " le %d", pentry->le);
1973
1974                         vty_out(vty, "\n");
1975                 }
1976         }
1977         return plist->count;
1978 }
1979
1980 static void prefix_list_reset_afi(afi_t afi, int orf)
1981 {
1982         struct prefix_list *plist;
1983         struct prefix_list *next;
1984         struct prefix_master *master;
1985
1986         master = prefix_master_get(afi, orf);
1987         if (master == NULL)
1988                 return;
1989
1990         for (plist = master->num.head; plist; plist = next) {
1991                 next = plist->next;
1992                 prefix_list_delete(plist);
1993         }
1994         for (plist = master->str.head; plist; plist = next) {
1995                 next = plist->next;
1996                 prefix_list_delete(plist);
1997         }
1998
1999         assert(master->num.head == NULL);
2000         assert(master->num.tail == NULL);
2001
2002         assert(master->str.head == NULL);
2003         assert(master->str.tail == NULL);
2004
2005         master->seqnum = 1;
2006         master->recent = NULL;
2007 }
2008
2009
2010 /* Prefix-list node. */
2011 static struct cmd_node prefix_node = {PREFIX_NODE,
2012                                       "", /* Prefix list has no interface. */
2013                                       1};
2014
2015 static int config_write_prefix_ipv4(struct vty *vty)
2016 {
2017         return config_write_prefix_afi(AFI_IP, vty);
2018 }
2019
2020 static void plist_autocomplete_afi(afi_t afi, vector comps,
2021                                    struct cmd_token *token)
2022 {
2023         struct prefix_list *plist;
2024         struct prefix_master *master;
2025
2026         master = prefix_master_get(afi, 0);
2027         if (master == NULL)
2028                 return;
2029
2030         for (plist = master->str.head; plist; plist = plist->next)
2031                 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, plist->name));
2032         for (plist = master->num.head; plist; plist = plist->next)
2033                 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, plist->name));
2034 }
2035
2036 static void plist_autocomplete(vector comps, struct cmd_token *token)
2037 {
2038         plist_autocomplete_afi(AFI_IP, comps, token);
2039         plist_autocomplete_afi(AFI_IP6, comps, token);
2040 }
2041
2042 static const struct cmd_variable_handler plist_var_handlers[] = {
2043         {/* "prefix-list WORD" */
2044          .varname = "prefix_list",
2045          .completions = plist_autocomplete},
2046         {.completions = NULL}};
2047
2048
2049 static void prefix_list_init_ipv4(void)
2050 {
2051         install_node(&prefix_node, config_write_prefix_ipv4);
2052
2053         install_element(CONFIG_NODE, &ip_prefix_list_cmd);
2054         install_element(CONFIG_NODE, &no_ip_prefix_list_cmd);
2055         install_element(CONFIG_NODE, &no_ip_prefix_list_all_cmd);
2056
2057         install_element(CONFIG_NODE, &ip_prefix_list_description_cmd);
2058         install_element(CONFIG_NODE, &no_ip_prefix_list_description_cmd);
2059         install_element(CONFIG_NODE,
2060                         &no_ip_prefix_list_description_comment_cmd);
2061
2062         install_element(CONFIG_NODE, &ip_prefix_list_sequence_number_cmd);
2063
2064         install_element(VIEW_NODE, &show_ip_prefix_list_cmd);
2065         install_element(VIEW_NODE, &show_ip_prefix_list_prefix_cmd);
2066         install_element(VIEW_NODE, &show_ip_prefix_list_summary_cmd);
2067         install_element(VIEW_NODE, &show_ip_prefix_list_detail_cmd);
2068
2069         install_element(ENABLE_NODE, &clear_ip_prefix_list_cmd);
2070 }
2071
2072 /* Prefix-list node. */
2073 static struct cmd_node prefix_ipv6_node = {
2074         PREFIX_IPV6_NODE, "", /* Prefix list has no interface. */
2075         1};
2076
2077 static int config_write_prefix_ipv6(struct vty *vty)
2078 {
2079         return config_write_prefix_afi(AFI_IP6, vty);
2080 }
2081
2082 static void prefix_list_init_ipv6(void)
2083 {
2084         install_node(&prefix_ipv6_node, config_write_prefix_ipv6);
2085
2086         install_element(CONFIG_NODE, &ipv6_prefix_list_cmd);
2087         install_element(CONFIG_NODE, &no_ipv6_prefix_list_cmd);
2088         install_element(CONFIG_NODE, &no_ipv6_prefix_list_all_cmd);
2089
2090         install_element(CONFIG_NODE, &ipv6_prefix_list_description_cmd);
2091         install_element(CONFIG_NODE, &no_ipv6_prefix_list_description_cmd);
2092         install_element(CONFIG_NODE,
2093                         &no_ipv6_prefix_list_description_comment_cmd);
2094
2095         install_element(CONFIG_NODE, &ipv6_prefix_list_sequence_number_cmd);
2096
2097         install_element(VIEW_NODE, &show_ipv6_prefix_list_cmd);
2098         install_element(VIEW_NODE, &show_ipv6_prefix_list_prefix_cmd);
2099         install_element(VIEW_NODE, &show_ipv6_prefix_list_summary_cmd);
2100         install_element(VIEW_NODE, &show_ipv6_prefix_list_detail_cmd);
2101
2102         install_element(ENABLE_NODE, &clear_ipv6_prefix_list_cmd);
2103 }
2104
2105 void prefix_list_init()
2106 {
2107         cmd_variable_handler_register(plist_var_handlers);
2108
2109         prefix_list_init_ipv4();
2110         prefix_list_init_ipv6();
2111 }
2112
2113 void prefix_list_reset()
2114 {
2115         prefix_list_reset_afi(AFI_IP, 0);
2116         prefix_list_reset_afi(AFI_IP6, 0);
2117         prefix_list_reset_afi(AFI_IP, 1);
2118         prefix_list_reset_afi(AFI_IP6, 1);
2119 }