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         int 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                        int 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 int prefix_new_seq_get(struct prefix_list *plist)
 385 {
 386         int maxseq;
 387         int 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                                                   int 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, int seq, int le, int ge)
 417 {
 418         struct prefix_list_entry *pentry;
 419
 420         for (pentry = plist->head; pentry; pentry = pentry->next)
 421                 if (prefix_same(&pentry->prefix, prefix)
 422                     && pentry->type == type) {
 423                         if (seq >= 0 && pentry->seq != seq)
 424                                 continue;
 425
 426                         if (pentry->le != le)
 427                                 continue;
 428                         if (pentry->ge != ge)
 429                                 continue;
 430
 431                         return pentry;
 432                 }
 433
 434         return NULL;
 435 }
 436
 437 static void trie_walk_affected(size_t validbits, struct pltrie_table *table,
 438                                uint8_t byte, struct prefix_list_entry *object,
 439                                void (*fn)(struct prefix_list_entry *object,
 440                                           struct prefix_list_entry **updptr))
 441 {
 442         uint8_t mask;
 443         uint16_t bwalk;
 444
 445         if (validbits > PLC_BITS) {
 446                 fn(object, &table->entries[byte].final_chain);
 447                 return;
 448         }
 449
 450         mask = (1 << (8 - validbits)) - 1;
 451         for (bwalk = byte & ~mask; bwalk <= byte + mask; bwalk++) {
 452                 fn(object, &table->entries[bwalk].up_chain);
 453         }
 454 }
 455
 456 static void trie_uninstall_fn(struct prefix_list_entry *object,
 457                               struct prefix_list_entry **updptr)
 458 {
 459         for (; *updptr; updptr = &(*updptr)->next_best)
 460                 if (*updptr == object) {
 461                         *updptr = object->next_best;
 462                         break;
 463                 }
 464 }
 465
 466 static int trie_table_empty(struct pltrie_table *table)
 467 {
 468         size_t i;
 469         for (i = 0; i < PLC_LEN; i++)
 470                 if (table->entries[i].next_table || table->entries[i].up_chain)
 471                         return 0;
 472         return 1;
 473 }
 474
 475 static void prefix_list_trie_del(struct prefix_list *plist,
 476                                  struct prefix_list_entry *pentry)
 477 {
 478         size_t depth, maxdepth = plist->master->trie_depth;
 479         uint8_t *bytes = &pentry->prefix.u.prefix;
 480         size_t validbits = pentry->prefix.prefixlen;
 481         struct pltrie_table *table, **tables[PLC_MAXLEVEL];
 482
 483         table = plist->trie;
 484         for (depth = 0; validbits > PLC_BITS && depth < maxdepth - 1; depth++) {
 485                 uint8_t byte = bytes[depth];
 486                 assert(table->entries[byte].next_table);
 487
 488                 tables[depth + 1] = &table->entries[byte].next_table;
 489                 table = table->entries[byte].next_table;
 490
 491                 validbits -= PLC_BITS;
 492         }
 493
 494         trie_walk_affected(validbits, table, bytes[depth], pentry,
 495                            trie_uninstall_fn);
 496
 497         for (; depth > 0; depth--)
 498                 if (trie_table_empty(*tables[depth])) {
 499                         XFREE(MTYPE_PREFIX_LIST_TRIE, *tables[depth]);
 500                         *tables[depth] = NULL;
 501                 }
 502 }
 503
 504
 505 static void prefix_list_entry_delete(struct prefix_list *plist,
 506                                      struct prefix_list_entry *pentry,
 507                                      int update_list)
 508 {
 509         if (plist == NULL || pentry == NULL)
 510                 return;
 511
 512         prefix_list_trie_del(plist, pentry);
 513
 514         if (pentry->prev)
 515                 pentry->prev->next = pentry->next;
 516         else
 517                 plist->head = pentry->next;
 518         if (pentry->next)
 519                 pentry->next->prev = pentry->prev;
 520         else
 521                 plist->tail = pentry->prev;
 522
 523         prefix_list_entry_free(pentry);
 524
 525         plist->count--;
 526
 527         if (update_list) {
 528                 route_map_notify_dependencies(plist->name,
 529                                               RMAP_EVENT_PLIST_DELETED);
 530                 if (plist->master->delete_hook)
 531                         (*plist->master->delete_hook)(plist);
 532
 533                 if (plist->head == NULL && plist->tail == NULL
 534                     && plist->desc == NULL)
 535                         prefix_list_delete(plist);
 536                 else
 537                         plist->master->recent = plist;
 538         }
 539 }
 540
 541 static void trie_install_fn(struct prefix_list_entry *object,
 542                             struct prefix_list_entry **updptr)
 543 {
 544         while (*updptr) {
 545                 if (*updptr == object)
 546                         return;
 547                 if ((*updptr)->prefix.prefixlen < object->prefix.prefixlen)
 548                         break;
 549                 if ((*updptr)->prefix.prefixlen == object->prefix.prefixlen
 550                     && (*updptr)->seq > object->seq)
 551                         break;
 552                 updptr = &(*updptr)->next_best;
 553         }
 554
 555         if (!object->next_best)
 556                 object->next_best = *updptr;
 557         else
 558                 assert(object->next_best == *updptr || !*updptr);
 559
 560         *updptr = object;
 561 }
 562
 563 static void prefix_list_trie_add(struct prefix_list *plist,
 564                                  struct prefix_list_entry *pentry)
 565 {
 566         size_t depth = plist->master->trie_depth;
 567         uint8_t *bytes = &pentry->prefix.u.prefix;
 568         size_t validbits = pentry->prefix.prefixlen;
 569         struct pltrie_table *table;
 570
 571         table = plist->trie;
 572         while (validbits > PLC_BITS && depth > 1) {
 573                 if (!table->entries[*bytes].next_table)
 574                         table->entries[*bytes].next_table =
 575                                 XCALLOC(MTYPE_PREFIX_LIST_TRIE,
 576                                         sizeof(struct pltrie_table));
 577                 table = table->entries[*bytes].next_table;
 578                 bytes++;
 579                 depth--;
 580                 validbits -= PLC_BITS;
 581         }
 582
 583         trie_walk_affected(validbits, table, *bytes, pentry, trie_install_fn);
 584 }
 585
 586 static void prefix_list_entry_add(struct prefix_list *plist,
 587                                   struct prefix_list_entry *pentry)
 588 {
 589         struct prefix_list_entry *replace;
 590         struct prefix_list_entry *point;
 591
 592         /* Automatic asignment of seq no. */
 593         if (pentry->seq == -1)
 594                 pentry->seq = prefix_new_seq_get(plist);
 595
 596         if (plist->tail && pentry->seq > plist->tail->seq)
 597                 point = NULL;
 598         else {
 599                 /* Is there any same seq prefix list entry? */
 600                 replace = prefix_seq_check(plist, pentry->seq);
 601                 if (replace)
 602                         prefix_list_entry_delete(plist, replace, 0);
 603
 604                 /* Check insert point. */
 605                 for (point = plist->head; point; point = point->next)
 606                         if (point->seq >= pentry->seq)
 607                                 break;
 608         }
 609
 610         /* In case of this is the first element of the list. */
 611         pentry->next = point;
 612
 613         if (point) {
 614                 if (point->prev)
 615                         point->prev->next = pentry;
 616                 else
 617                         plist->head = pentry;
 618
 619                 pentry->prev = point->prev;
 620                 point->prev = pentry;
 621         } else {
 622                 if (plist->tail)
 623                         plist->tail->next = pentry;
 624                 else
 625                         plist->head = pentry;
 626
 627                 pentry->prev = plist->tail;
 628                 plist->tail = pentry;
 629         }
 630
 631         prefix_list_trie_add(plist, pentry);
 632
 633         /* Increment count. */
 634         plist->count++;
 635
 636         /* Run hook function. */
 637         if (plist->master->add_hook)
 638                 (*plist->master->add_hook)(plist);
 639
 640         route_map_notify_dependencies(plist->name, RMAP_EVENT_PLIST_ADDED);
 641         plist->master->recent = plist;
 642 }
 643
 644 /* Return string of prefix_list_type. */
 645 static const char *prefix_list_type_str(struct prefix_list_entry *pentry)
 646 {
 647         switch (pentry->type) {
 648         case PREFIX_PERMIT:
 649                 return "permit";
 650         case PREFIX_DENY:
 651                 return "deny";
 652         default:
 653                 return "";
 654         }
 655 }
 656
 657 static int prefix_list_entry_match(struct prefix_list_entry *pentry,
 658                                    struct prefix *p)
 659 {
 660         int ret;
 661
 662         ret = prefix_match(&pentry->prefix, p);
 663         if (!ret)
 664                 return 0;
 665
 666         /* In case of le nor ge is specified, exact match is performed. */
 667         if (!pentry->le && !pentry->ge) {
 668                 if (pentry->prefix.prefixlen != p->prefixlen)
 669                         return 0;
 670         } else {
 671                 if (pentry->le)
 672                         if (p->prefixlen > pentry->le)
 673                                 return 0;
 674
 675                 if (pentry->ge)
 676                         if (p->prefixlen < pentry->ge)
 677                                 return 0;
 678         }
 679         return 1;
 680 }
 681
 682 enum prefix_list_type prefix_list_apply_which_prefix(struct prefix_list *plist,
 683                                                      struct prefix **which,
 684                                                      void *object)
 685 {
 686         struct prefix_list_entry *pentry, *pbest = NULL;
 687
 688         struct prefix *p = (struct prefix *)object;
 689         uint8_t *byte = &p->u.prefix;
 690         size_t depth;
 691         size_t validbits = p->prefixlen;
 692         struct pltrie_table *table;
 693
 694         if (plist == NULL) {
 695                 if (which)
 696                         *which = NULL;
 697                 return PREFIX_DENY;
 698         }
 699
 700         if (plist->count == 0) {
 701                 if (which)
 702                         *which = NULL;
 703                 return PREFIX_PERMIT;
 704         }
 705
 706         depth = plist->master->trie_depth;
 707         table = plist->trie;
 708         while (1) {
 709                 for (pentry = table->entries[*byte].up_chain; pentry;
 710                      pentry = pentry->next_best) {
 711                         if (pbest && pbest->seq < pentry->seq)
 712                                 continue;
 713                         if (prefix_list_entry_match(pentry, p))
 714                                 pbest = pentry;
 715                 }
 716
 717                 if (validbits <= PLC_BITS)
 718                         break;
 719                 validbits -= PLC_BITS;
 720
 721                 if (--depth) {
 722                         if (!table->entries[*byte].next_table)
 723                                 break;
 724
 725                         table = table->entries[*byte].next_table;
 726                         byte++;
 727                         continue;
 728                 }
 729
 730                 for (pentry = table->entries[*byte].final_chain; pentry;
 731                      pentry = pentry->next_best) {
 732                         if (pbest && pbest->seq < pentry->seq)
 733                                 continue;
 734                         if (prefix_list_entry_match(pentry, p))
 735                                 pbest = pentry;
 736                 }
 737                 break;
 738         }
 739
 740         if (which) {
 741                 if (pbest)
 742                         *which = &pbest->prefix;
 743                 else
 744                         *which = NULL;
 745         }
 746
 747         if (pbest == NULL)
 748                 return PREFIX_DENY;
 749
 750         return pbest->type;
 751 }
 752
 753 static void __attribute__((unused)) prefix_list_print(struct prefix_list *plist)
 754 {
 755         struct prefix_list_entry *pentry;
 756
 757         if (plist == NULL)
 758                 return;
 759
 760         printf("ip prefix-list %s: %d entries\n", plist->name, plist->count);
 761
 762         for (pentry = plist->head; pentry; pentry = pentry->next) {
 763                 if (pentry->any)
 764                         printf("any %s\n", prefix_list_type_str(pentry));
 765                 else {
 766                         struct prefix *p;
 767                         char buf[BUFSIZ];
 768
 769                         p = &pentry->prefix;
 770
 771                         printf("  seq %u %s %s/%d", pentry->seq,
 772                                prefix_list_type_str(pentry),
 773                                inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ),
 774                                p->prefixlen);
 775                         if (pentry->ge)
 776                                 printf(" ge %d", pentry->ge);
 777                         if (pentry->le)
 778                                 printf(" le %d", pentry->le);
 779                         printf("\n");
 780                 }
 781         }
 782 }
 783
 784 /* Retrun 1 when plist already include pentry policy. */
 785 static struct prefix_list_entry *
 786 prefix_entry_dup_check(struct prefix_list *plist, struct prefix_list_entry *new)
 787 {
 788         size_t depth, maxdepth = plist->master->trie_depth;
 789         uint8_t byte, *bytes = &new->prefix.u.prefix;
 790         size_t validbits = new->prefix.prefixlen;
 791         struct pltrie_table *table;
 792         struct prefix_list_entry *pentry;
 793         int seq = 0;
 794
 795         if (new->seq == -1)
 796                 seq = prefix_new_seq_get(plist);
 797         else
 798                 seq = new->seq;
 799
 800         table = plist->trie;
 801         for (depth = 0; validbits > PLC_BITS && depth < maxdepth - 1; depth++) {
 802                 byte = bytes[depth];
 803                 if (!table->entries[byte].next_table)
 804                         return NULL;
 805
 806                 table = table->entries[byte].next_table;
 807                 validbits -= PLC_BITS;
 808         }
 809
 810         byte = bytes[depth];
 811         if (validbits > PLC_BITS)
 812                 pentry = table->entries[byte].final_chain;
 813         else
 814                 pentry = table->entries[byte].up_chain;
 815
 816         for (; pentry; pentry = pentry->next_best) {
 817                 if (prefix_same(&pentry->prefix, &new->prefix)
 818                     && pentry->type == new->type && pentry->le == new->le
 819                     && pentry->ge == new->ge && pentry->seq != seq)
 820                         return pentry;
 821         }
 822         return NULL;
 823 }
 824
 825 static int vty_invalid_prefix_range(struct vty *vty, const char *prefix)
 826 {
 827         vty_out(vty,
 828                 "%% Invalid prefix range for %s, make sure: len < ge-value <= le-value\n",
 829                 prefix);
 830         return CMD_WARNING_CONFIG_FAILED;
 831 }
 832
 833 static int vty_prefix_list_install(struct vty *vty, afi_t afi, const char *name,
 834                                    const char *seq, const char *typestr,
 835                                    const char *prefix, const char *ge,
 836                                    const char *le)
 837 {
 838         int ret;
 839         enum prefix_list_type type;
 840         struct prefix_list *plist;
 841         struct prefix_list_entry *pentry;
 842         struct prefix_list_entry *dup;
 843         struct prefix p, p_tmp;
 844         int any = 0;
 845         int seqnum = -1;
 846         int lenum = 0;
 847         int genum = 0;
 848
 849         /* Sequential number. */
 850         if (seq)
 851                 seqnum = atoi(seq);
 852
 853         /* ge and le number */
 854         if (ge)
 855                 genum = atoi(ge);
 856         if (le)
 857                 lenum = atoi(le);
 858
 859         /* Check filter type. */
 860         if (strncmp("permit", typestr, 1) == 0)
 861                 type = PREFIX_PERMIT;
 862         else if (strncmp("deny", typestr, 1) == 0)
 863                 type = PREFIX_DENY;
 864         else {
 865                 vty_out(vty, "%% prefix type must be permit or deny\n");
 866                 return CMD_WARNING_CONFIG_FAILED;
 867         }
 868
 869         /* "any" is special token for matching any IPv4 addresses.  */
 870         switch (afi) {
 871         case AFI_IP:
 872                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
 873                         ret = str2prefix_ipv4("0.0.0.0/0",
 874                                               (struct prefix_ipv4 *)&p);
 875                         genum = 0;
 876                         lenum = IPV4_MAX_BITLEN;
 877                         any = 1;
 878                 } else
 879                         ret = str2prefix_ipv4(prefix, (struct prefix_ipv4 *)&p);
 880
 881                 if (ret <= 0) {
 882                         vty_out(vty, "%% Malformed IPv4 prefix\n");
 883                         return CMD_WARNING_CONFIG_FAILED;
 884                 }
 885
 886                 /* make a copy to verify prefix matches mask length */
 887                 prefix_copy(&p_tmp, &p);
 888                 apply_mask_ipv4((struct prefix_ipv4 *)&p_tmp);
 889
 890                 break;
 891         case AFI_IP6:
 892                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
 893                         ret = str2prefix_ipv6("::/0", (struct prefix_ipv6 *)&p);
 894                         genum = 0;
 895                         lenum = IPV6_MAX_BITLEN;
 896                         any = 1;
 897                 } else
 898                         ret = str2prefix_ipv6(prefix, (struct prefix_ipv6 *)&p);
 899
 900                 if (ret <= 0) {
 901                         vty_out(vty, "%% Malformed IPv6 prefix\n");
 902                         return CMD_WARNING_CONFIG_FAILED;
 903                 }
 904
 905                 /* make a copy to verify prefix matches mask length */
 906                 prefix_copy(&p_tmp, &p);
 907                 apply_mask_ipv6((struct prefix_ipv6 *)&p_tmp);
 908
 909                 break;
 910         case AFI_L2VPN:
 911         default:
 912                 vty_out(vty, "%% Unrecognized AFI (%d)\n", afi);
 913                 return CMD_WARNING_CONFIG_FAILED;
 914                 break;
 915         }
 916
 917         /* If prefix has bits not under the mask, adjust it to fit */
 918         if (!prefix_same(&p_tmp, &p)) {
 919                 char buf[PREFIX2STR_BUFFER];
 920                 char buf_tmp[PREFIX2STR_BUFFER];
 921                 prefix2str(&p, buf, sizeof(buf));
 922                 prefix2str(&p_tmp, buf_tmp, sizeof(buf_tmp));
 923                 zlog_warn(
 924                         "Prefix-list %s prefix changed from %s to %s to match length",
 925                         name, buf, buf_tmp);
 926                 p = p_tmp;
 927         }
 928
 929         /* ge and le check. */
 930         if (genum && (genum <= p.prefixlen))
 931                 return vty_invalid_prefix_range(vty, prefix);
 932
 933         if (lenum && (lenum <= p.prefixlen))
 934                 return vty_invalid_prefix_range(vty, prefix);
 935
 936         if (lenum && (genum > lenum))
 937                 return vty_invalid_prefix_range(vty, prefix);
 938
 939         if (genum && (lenum == (afi == AFI_IP ? 32 : 128)))
 940                 lenum = 0;
 941
 942         /* Get prefix_list with name. */
 943         plist = prefix_list_get(afi, 0, name);
 944
 945         /* Make prefix entry. */
 946         pentry = prefix_list_entry_make(&p, type, seqnum, lenum, genum, any);
 947
 948         /* Check same policy. */
 949         dup = prefix_entry_dup_check(plist, pentry);
 950
 951         if (dup) {
 952                 prefix_list_entry_free(pentry);
 953                 return CMD_SUCCESS;
 954         }
 955
 956         /* Install new filter to the access_list. */
 957         prefix_list_entry_add(plist, pentry);
 958
 959         return CMD_SUCCESS;
 960 }
 961
 962 static int vty_prefix_list_uninstall(struct vty *vty, afi_t afi,
 963                                      const char *name, const char *seq,
 964                                      const char *typestr, const char *prefix,
 965                                      const char *ge, const char *le)
 966 {
 967         int ret;
 968         enum prefix_list_type type;
 969         struct prefix_list *plist;
 970         struct prefix_list_entry *pentry;
 971         struct prefix p;
 972         int seqnum = -1;
 973         int lenum = 0;
 974         int genum = 0;
 975
 976         /* Check prefix list name. */
 977         plist = prefix_list_lookup(afi, name);
 978         if (!plist) {
 979                 vty_out(vty, "%% Can't find specified prefix-list\n");
 980                 return CMD_WARNING_CONFIG_FAILED;
 981         }
 982
 983         /* Only prefix-list name specified, delete the entire prefix-list. */
 984         if (seq == NULL && typestr == NULL && prefix == NULL && ge == NULL
 985             && le == NULL) {
 986                 prefix_list_delete(plist);
 987                 return CMD_SUCCESS;
 988         }
 989
 990         /* We must have, at a minimum, both the type and prefix here */
 991         if ((typestr == NULL) || (prefix == NULL)) {
 992                 vty_out(vty, "%% Both prefix and type required\n");
 993                 return CMD_WARNING_CONFIG_FAILED;
 994         }
 995
 996         /* Check sequence number. */
 997         if (seq)
 998                 seqnum = atoi(seq);
 999
1000         /* ge and le number */
1001         if (ge)
1002                 genum = atoi(ge);
1003         if (le)
1004                 lenum = atoi(le);
1005
1006         /* Check of filter type. */
1007         if (strncmp("permit", typestr, 1) == 0)
1008                 type = PREFIX_PERMIT;
1009         else if (strncmp("deny", typestr, 1) == 0)
1010                 type = PREFIX_DENY;
1011         else {
1012                 vty_out(vty, "%% prefix type must be permit or deny\n");
1013                 return CMD_WARNING_CONFIG_FAILED;
1014         }
1015
1016         /* "any" is special token for matching any IPv4 addresses.  */
1017         if (afi == AFI_IP) {
1018                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
1019                         ret = str2prefix_ipv4("0.0.0.0/0",
1020                                               (struct prefix_ipv4 *)&p);
1021                         genum = 0;
1022                         lenum = IPV4_MAX_BITLEN;
1023                 } else
1024                         ret = str2prefix_ipv4(prefix, (struct prefix_ipv4 *)&p);
1025
1026                 if (ret <= 0) {
1027                         vty_out(vty, "%% Malformed IPv4 prefix\n");
1028                         return CMD_WARNING_CONFIG_FAILED;
1029                 }
1030         } else if (afi == AFI_IP6) {
1031                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
1032                         ret = str2prefix_ipv6("::/0", (struct prefix_ipv6 *)&p);
1033                         genum = 0;
1034                         lenum = IPV6_MAX_BITLEN;
1035                 } else
1036                         ret = str2prefix_ipv6(prefix, (struct prefix_ipv6 *)&p);
1037
1038                 if (ret <= 0) {
1039                         vty_out(vty, "%% Malformed IPv6 prefix\n");
1040                         return CMD_WARNING_CONFIG_FAILED;
1041                 }
1042         }
1043
1044         /* Lookup prefix entry. */
1045         pentry =
1046                 prefix_list_entry_lookup(plist, &p, type, seqnum, lenum, genum);
1047
1048         if (pentry == NULL) {
1049                 vty_out(vty, "%% Can't find specified prefix-list\n");
1050                 return CMD_WARNING_CONFIG_FAILED;
1051         }
1052
1053         /* Install new filter to the access_list. */
1054         prefix_list_entry_delete(plist, pentry, 1);
1055
1056         return CMD_SUCCESS;
1057 }
1058
1059 static int vty_prefix_list_desc_unset(struct vty *vty, afi_t afi,
1060                                       const char *name)
1061 {
1062         struct prefix_list *plist;
1063
1064         plist = prefix_list_lookup(afi, name);
1065         if (!plist) {
1066                 vty_out(vty, "%% Can't find specified prefix-list\n");
1067                 return CMD_WARNING_CONFIG_FAILED;
1068         }
1069
1070         if (plist->desc) {
1071                 XFREE(MTYPE_TMP, plist->desc);
1072                 plist->desc = NULL;
1073         }
1074
1075         if (plist->head == NULL && plist->tail == NULL && plist->desc == NULL)
1076                 prefix_list_delete(plist);
1077
1078         return CMD_SUCCESS;
1079 }
1080
1081 enum display_type {
1082         normal_display,
1083         summary_display,
1084         detail_display,
1085         sequential_display,
1086         longer_display,
1087         first_match_display
1088 };
1089
1090 static void vty_show_prefix_entry(struct vty *vty, afi_t afi,
1091                                   struct prefix_list *plist,
1092                                   struct prefix_master *master,
1093                                   enum display_type dtype, int seqnum)
1094 {
1095         struct prefix_list_entry *pentry;
1096
1097         /* Print the name of the protocol */
1098         vty_out(vty, "%s: ", frr_protoname);
1099
1100         if (dtype == normal_display) {
1101                 vty_out(vty, "ip%s prefix-list %s: %d entries\n",
1102                         afi == AFI_IP ? "" : "v6", plist->name, plist->count);
1103                 if (plist->desc)
1104                         vty_out(vty, "   Description: %s\n", plist->desc);
1105         } else if (dtype == summary_display || dtype == detail_display) {
1106                 vty_out(vty, "ip%s prefix-list %s:\n",
1107                         afi == AFI_IP ? "" : "v6", plist->name);
1108
1109                 if (plist->desc)
1110                         vty_out(vty, "   Description: %s\n", plist->desc);
1111
1112                 vty_out(vty,
1113                         "   count: %d, range entries: %d, sequences: %u - %u\n",
1114                         plist->count, plist->rangecount,
1115                         plist->head ? plist->head->seq : 0,
1116                         plist->tail ? plist->tail->seq : 0);
1117         }
1118
1119         if (dtype != summary_display) {
1120                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1121                         if (dtype == sequential_display
1122                             && pentry->seq != seqnum)
1123                                 continue;
1124
1125                         vty_out(vty, "   ");
1126
1127                         if (master->seqnum)
1128                                 vty_out(vty, "seq %u ", pentry->seq);
1129
1130                         vty_out(vty, "%s ", prefix_list_type_str(pentry));
1131
1132                         if (pentry->any)
1133                                 vty_out(vty, "any");
1134                         else {
1135                                 struct prefix *p = &pentry->prefix;
1136                                 char buf[BUFSIZ];
1137
1138                                 vty_out(vty, "%s/%d",
1139                                         inet_ntop(p->family, &p->u.prefix, buf,
1140                                                   BUFSIZ),
1141                                         p->prefixlen);
1142
1143                                 if (pentry->ge)
1144                                         vty_out(vty, " ge %d", pentry->ge);
1145                                 if (pentry->le)
1146                                         vty_out(vty, " le %d", pentry->le);
1147                         }
1148
1149                         if (dtype == detail_display
1150                             || dtype == sequential_display)
1151                                 vty_out(vty, " (hit count: %ld, refcount: %ld)",
1152                                         pentry->hitcnt, pentry->refcnt);
1153
1154                         vty_out(vty, "\n");
1155                 }
1156         }
1157 }
1158
1159 static int vty_show_prefix_list(struct vty *vty, afi_t afi, const char *name,
1160                                 const char *seq, enum display_type dtype)
1161 {
1162         struct prefix_list *plist;
1163         struct prefix_master *master;
1164         int seqnum = 0;
1165
1166         master = prefix_master_get(afi, 0);
1167         if (master == NULL)
1168                 return CMD_WARNING;
1169
1170         if (seq)
1171                 seqnum = atoi(seq);
1172
1173         if (name) {
1174                 plist = prefix_list_lookup(afi, name);
1175                 if (!plist) {
1176                         vty_out(vty, "%% Can't find specified prefix-list\n");
1177                         return CMD_WARNING;
1178                 }
1179                 vty_show_prefix_entry(vty, afi, plist, master, dtype, seqnum);
1180         } else {
1181                 if (dtype == detail_display || dtype == summary_display) {
1182                         if (master->recent)
1183                                 vty_out(vty,
1184                                         "Prefix-list with the last deletion/insertion: %s\n",
1185                                         master->recent->name);
1186                 }
1187
1188                 for (plist = master->num.head; plist; plist = plist->next)
1189                         vty_show_prefix_entry(vty, afi, plist, master, dtype,
1190                                               seqnum);
1191
1192                 for (plist = master->str.head; plist; plist = plist->next)
1193                         vty_show_prefix_entry(vty, afi, plist, master, dtype,
1194                                               seqnum);
1195         }
1196
1197         return CMD_SUCCESS;
1198 }
1199
1200 static int vty_show_prefix_list_prefix(struct vty *vty, afi_t afi,
1201                                        const char *name, const char *prefix,
1202                                        enum display_type type)
1203 {
1204         struct prefix_list *plist;
1205         struct prefix_list_entry *pentry;
1206         struct prefix p;
1207         int ret;
1208         int match;
1209
1210         plist = prefix_list_lookup(afi, name);
1211         if (!plist) {
1212                 vty_out(vty, "%% Can't find specified prefix-list\n");
1213                 return CMD_WARNING;
1214         }
1215
1216         ret = str2prefix(prefix, &p);
1217         if (ret <= 0) {
1218                 vty_out(vty, "%% prefix is malformed\n");
1219                 return CMD_WARNING;
1220         }
1221
1222         for (pentry = plist->head; pentry; pentry = pentry->next) {
1223                 match = 0;
1224
1225                 if (type == normal_display || type == first_match_display)
1226                         if (prefix_same(&p, &pentry->prefix))
1227                                 match = 1;
1228
1229                 if (type == longer_display)
1230                         if (prefix_match(&p, &pentry->prefix))
1231                                 match = 1;
1232
1233                 if (match) {
1234                         vty_out(vty, "   seq %u %s ", pentry->seq,
1235                                 prefix_list_type_str(pentry));
1236
1237                         if (pentry->any)
1238                                 vty_out(vty, "any");
1239                         else {
1240                                 struct prefix *p = &pentry->prefix;
1241                                 char buf[BUFSIZ];
1242
1243                                 vty_out(vty, "%s/%d",
1244                                         inet_ntop(p->family, &p->u.prefix, buf,
1245                                                   BUFSIZ),
1246                                         p->prefixlen);
1247
1248                                 if (pentry->ge)
1249                                         vty_out(vty, " ge %d", pentry->ge);
1250                                 if (pentry->le)
1251                                         vty_out(vty, " le %d", pentry->le);
1252                         }
1253
1254                         if (type == normal_display
1255                             || type == first_match_display)
1256                                 vty_out(vty, " (hit count: %ld, refcount: %ld)",
1257                                         pentry->hitcnt, pentry->refcnt);
1258
1259                         vty_out(vty, "\n");
1260
1261                         if (type == first_match_display)
1262                                 return CMD_SUCCESS;
1263                 }
1264         }
1265         return CMD_SUCCESS;
1266 }
1267
1268 static int vty_clear_prefix_list(struct vty *vty, afi_t afi, const char *name,
1269                                  const char *prefix)
1270 {
1271         struct prefix_master *master;
1272         struct prefix_list *plist;
1273         struct prefix_list_entry *pentry;
1274         int ret;
1275         struct prefix p;
1276
1277         master = prefix_master_get(afi, 0);
1278         if (master == NULL)
1279                 return CMD_WARNING;
1280
1281         if (name == NULL && prefix == NULL) {
1282                 for (plist = master->num.head; plist; plist = plist->next)
1283                         for (pentry = plist->head; pentry;
1284                              pentry = pentry->next)
1285                                 pentry->hitcnt = 0;
1286
1287                 for (plist = master->str.head; plist; plist = plist->next)
1288                         for (pentry = plist->head; pentry;
1289                              pentry = pentry->next)
1290                                 pentry->hitcnt = 0;
1291         } else {
1292                 plist = prefix_list_lookup(afi, name);
1293                 if (!plist) {
1294                         vty_out(vty, "%% Can't find specified prefix-list\n");
1295                         return CMD_WARNING;
1296                 }
1297
1298                 if (prefix) {
1299                         ret = str2prefix(prefix, &p);
1300                         if (ret <= 0) {
1301                                 vty_out(vty, "%% prefix is malformed\n");
1302                                 return CMD_WARNING;
1303                         }
1304                 }
1305
1306                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1307                         if (prefix) {
1308                                 if (prefix_match(&pentry->prefix, &p))
1309                                         pentry->hitcnt = 0;
1310                         } else
1311                                 pentry->hitcnt = 0;
1312                 }
1313         }
1314         return CMD_SUCCESS;
1315 }
1316
1317 #ifndef VTYSH_EXTRACT_PL
1318 #include "plist_clippy.c"
1319 #endif
1320
1321 DEFPY (ip_prefix_list,
1322        ip_prefix_list_cmd,
1323        "ip prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|A.B.C.D/M$dest [{ge (0-32)|le (0-32)}]>",
1324        IP_STR
1325        PREFIX_LIST_STR
1326        "Name of a prefix list\n"
1327        "sequence number of an entry\n"
1328        "Sequence number\n"
1329        "Specify packets to reject\n"
1330        "Specify packets to forward\n"
1331        "Any prefix match.  Same as \"0.0.0.0/0 le 32\"\n"
1332        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1333        "Minimum prefix length to be matched\n"
1334        "Minimum prefix length\n"
1335        "Maximum prefix length to be matched\n"
1336        "Maximum prefix length\n")
1337 {
1338         return vty_prefix_list_install(vty, AFI_IP, prefix_list, seq_str,
1339                                        action, dest, ge_str, le_str);
1340 }
1341
1342 DEFPY (no_ip_prefix_list,
1343        no_ip_prefix_list_cmd,
1344        "no ip prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|A.B.C.D/M$dest [{ge (0-32)|le (0-32)}]>",
1345        NO_STR
1346        IP_STR
1347        PREFIX_LIST_STR
1348        "Name of a prefix list\n"
1349        "sequence number of an entry\n"
1350        "Sequence number\n"
1351        "Specify packets to reject\n"
1352        "Specify packets to forward\n"
1353        "Any prefix match.  Same as \"0.0.0.0/0 le 32\"\n"
1354        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1355        "Minimum prefix length to be matched\n"
1356        "Minimum prefix length\n"
1357        "Maximum prefix length to be matched\n"
1358        "Maximum prefix length\n")
1359 {
1360         return vty_prefix_list_uninstall(vty, AFI_IP, prefix_list, seq_str,
1361                                          action, dest, ge_str, le_str);
1362 }
1363
1364 DEFPY (no_ip_prefix_list_all,
1365        no_ip_prefix_list_all_cmd,
1366        "no ip prefix-list WORD",
1367        NO_STR
1368        IP_STR
1369        PREFIX_LIST_STR
1370        "Name of a prefix list\n")
1371 {
1372         return vty_prefix_list_uninstall(vty, AFI_IP, prefix_list, NULL, NULL,
1373                                          NULL, NULL, NULL);
1374 }
1375
1376 DEFPY (ip_prefix_list_sequence_number,
1377        ip_prefix_list_sequence_number_cmd,
1378        "[no] ip prefix-list sequence-number",
1379        NO_STR
1380        IP_STR
1381        PREFIX_LIST_STR
1382        "Include/exclude sequence numbers in NVGEN\n")
1383 {
1384         prefix_master_ipv4.seqnum = no ? 0 : 1;
1385         return CMD_SUCCESS;
1386 }
1387
1388 DEFUN (ip_prefix_list_description,
1389        ip_prefix_list_description_cmd,
1390        "ip prefix-list WORD description LINE...",
1391        IP_STR
1392        PREFIX_LIST_STR
1393        "Name of a prefix list\n"
1394        "Prefix-list specific description\n"
1395        "Up to 80 characters describing this prefix-list\n")
1396 {
1397         int idx_word = 2;
1398         int idx_line = 4;
1399         struct prefix_list *plist;
1400
1401         plist = prefix_list_get(AFI_IP, 0, argv[idx_word]->arg);
1402
1403         if (plist->desc) {
1404                 XFREE(MTYPE_TMP, plist->desc);
1405                 plist->desc = NULL;
1406         }
1407         plist->desc = argv_concat(argv, argc, idx_line);
1408
1409         return CMD_SUCCESS;
1410 }
1411
1412 DEFUN (no_ip_prefix_list_description,
1413        no_ip_prefix_list_description_cmd,
1414        "no ip prefix-list WORD description",
1415        NO_STR
1416        IP_STR
1417        PREFIX_LIST_STR
1418        "Name of a prefix list\n"
1419        "Prefix-list specific description\n")
1420 {
1421         int idx_word = 3;
1422         return vty_prefix_list_desc_unset(vty, AFI_IP, argv[idx_word]->arg);
1423 }
1424
1425 /* ALIAS_FIXME */
1426 DEFUN (no_ip_prefix_list_description_comment,
1427        no_ip_prefix_list_description_comment_cmd,
1428        "no ip prefix-list WORD description LINE...",
1429        NO_STR
1430        IP_STR
1431        PREFIX_LIST_STR
1432        "Name of a prefix list\n"
1433        "Prefix-list specific description\n"
1434        "Up to 80 characters describing this prefix-list\n")
1435 {
1436         return no_ip_prefix_list_description(self, vty, argc, argv);
1437 }
1438
1439 DEFPY (show_ip_prefix_list,
1440        show_ip_prefix_list_cmd,
1441        "show ip prefix-list [WORD [seq$dseq (1-4294967295)$arg]]",
1442        SHOW_STR
1443        IP_STR
1444        PREFIX_LIST_STR
1445        "Name of a prefix list\n"
1446        "sequence number of an entry\n"
1447        "Sequence number\n")
1448 {
1449         enum display_type dtype = normal_display;
1450         if (dseq)
1451                 dtype = sequential_display;
1452
1453         return vty_show_prefix_list(vty, AFI_IP, prefix_list, arg_str, dtype);
1454 }
1455
1456 DEFPY (show_ip_prefix_list_prefix,
1457        show_ip_prefix_list_prefix_cmd,
1458        "show ip prefix-list WORD A.B.C.D/M$prefix [longer$dl|first-match$dfm]",
1459        SHOW_STR
1460        IP_STR
1461        PREFIX_LIST_STR
1462        "Name of a prefix list\n"
1463        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1464        "Lookup longer prefix\n"
1465        "First matched prefix\n")
1466 {
1467         enum display_type dtype = normal_display;
1468         if (dl)
1469                 dtype = longer_display;
1470         else if (dfm)
1471                 dtype = first_match_display;
1472
1473         return vty_show_prefix_list_prefix(vty, AFI_IP, prefix_list, prefix_str,
1474                                            dtype);
1475 }
1476
1477 DEFPY (show_ip_prefix_list_summary,
1478        show_ip_prefix_list_summary_cmd,
1479        "show ip prefix-list summary [WORD$prefix_list]",
1480        SHOW_STR
1481        IP_STR
1482        PREFIX_LIST_STR
1483        "Summary of prefix lists\n"
1484        "Name of a prefix list\n")
1485 {
1486         return vty_show_prefix_list(vty, AFI_IP, prefix_list, NULL,
1487                                     summary_display);
1488 }
1489
1490 DEFPY (show_ip_prefix_list_detail,
1491        show_ip_prefix_list_detail_cmd,
1492        "show ip prefix-list detail [WORD$prefix_list]",
1493        SHOW_STR
1494        IP_STR
1495        PREFIX_LIST_STR
1496        "Detail of prefix lists\n"
1497        "Name of a prefix list\n")
1498 {
1499         return vty_show_prefix_list(vty, AFI_IP, prefix_list, NULL,
1500                                     detail_display);
1501 }
1502
1503 DEFPY (clear_ip_prefix_list,
1504        clear_ip_prefix_list_cmd,
1505        "clear ip prefix-list [WORD [A.B.C.D/M$prefix]]",
1506        CLEAR_STR
1507        IP_STR
1508        PREFIX_LIST_STR
1509        "Name of a prefix list\n"
1510        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n")
1511 {
1512         return vty_clear_prefix_list(vty, AFI_IP, prefix_list, prefix_str);
1513 }
1514
1515 DEFPY (ipv6_prefix_list,
1516        ipv6_prefix_list_cmd,
1517        "ipv6 prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|X:X::X:X/M$dest [{ge (0-128)|le (0-128)}]>",
1518        IPV6_STR
1519        PREFIX_LIST_STR
1520        "Name of a prefix list\n"
1521        "sequence number of an entry\n"
1522        "Sequence number\n"
1523        "Specify packets to reject\n"
1524        "Specify packets to forward\n"
1525        "Any prefix match.  Same as \"::0/0 le 128\"\n"
1526        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1527        "Maximum prefix length to be matched\n"
1528        "Maximum prefix length\n"
1529        "Minimum prefix length to be matched\n"
1530        "Minimum prefix length\n")
1531 {
1532         return vty_prefix_list_install(vty, AFI_IP6, prefix_list, seq_str,
1533                                        action, dest, ge_str, le_str);
1534 }
1535
1536 DEFPY (no_ipv6_prefix_list,
1537        no_ipv6_prefix_list_cmd,
1538        "no ipv6 prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|X:X::X:X/M$dest [{ge (0-128)|le (0-128)}]>",
1539        NO_STR
1540        IPV6_STR
1541        PREFIX_LIST_STR
1542        "Name of a prefix list\n"
1543        "sequence number of an entry\n"
1544        "Sequence number\n"
1545        "Specify packets to reject\n"
1546        "Specify packets to forward\n"
1547        "Any prefix match.  Same as \"::0/0 le 128\"\n"
1548        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1549        "Maximum prefix length to be matched\n"
1550        "Maximum prefix length\n"
1551        "Minimum prefix length to be matched\n"
1552        "Minimum prefix length\n")
1553 {
1554         return vty_prefix_list_uninstall(vty, AFI_IP6, prefix_list, seq_str,
1555                                          action, dest, ge_str, le_str);
1556 }
1557
1558 DEFPY (no_ipv6_prefix_list_all,
1559        no_ipv6_prefix_list_all_cmd,
1560        "no ipv6 prefix-list WORD",
1561        NO_STR
1562        IPV6_STR
1563        PREFIX_LIST_STR
1564        "Name of a prefix list\n")
1565 {
1566         return vty_prefix_list_uninstall(vty, AFI_IP6, prefix_list, NULL, NULL,
1567                                          NULL, NULL, NULL);
1568 }
1569
1570 DEFPY (ipv6_prefix_list_sequence_number,
1571        ipv6_prefix_list_sequence_number_cmd,
1572        "[no] ipv6 prefix-list sequence-number",
1573        NO_STR
1574        IPV6_STR
1575        PREFIX_LIST_STR
1576        "Include/exclude sequence numbers in NVGEN\n")
1577 {
1578         prefix_master_ipv6.seqnum = no ? 0 : 1;
1579         return CMD_SUCCESS;
1580 }
1581
1582 DEFUN (ipv6_prefix_list_description,
1583        ipv6_prefix_list_description_cmd,
1584        "ipv6 prefix-list WORD description LINE...",
1585        IPV6_STR
1586        PREFIX_LIST_STR
1587        "Name of a prefix list\n"
1588        "Prefix-list specific description\n"
1589        "Up to 80 characters describing this prefix-list\n")
1590 {
1591         int idx_word = 2;
1592         int iddx_line = 4;
1593         struct prefix_list *plist;
1594
1595         plist = prefix_list_get(AFI_IP6, 0, argv[idx_word]->arg);
1596
1597         if (plist->desc) {
1598                 XFREE(MTYPE_TMP, plist->desc);
1599                 plist->desc = NULL;
1600         }
1601         plist->desc = argv_concat(argv, argc, iddx_line);
1602
1603         return CMD_SUCCESS;
1604 }
1605
1606 DEFUN (no_ipv6_prefix_list_description,
1607        no_ipv6_prefix_list_description_cmd,
1608        "no ipv6 prefix-list WORD description",
1609        NO_STR
1610        IPV6_STR
1611        PREFIX_LIST_STR
1612        "Name of a prefix list\n"
1613        "Prefix-list specific description\n")
1614 {
1615         int idx_word = 3;
1616         return vty_prefix_list_desc_unset(vty, AFI_IP6, argv[idx_word]->arg);
1617 }
1618
1619 /* ALIAS_FIXME */
1620 DEFUN (no_ipv6_prefix_list_description_comment,
1621        no_ipv6_prefix_list_description_comment_cmd,
1622        "no ipv6 prefix-list WORD description LINE...",
1623        NO_STR
1624        IPV6_STR
1625        PREFIX_LIST_STR
1626        "Name of a prefix list\n"
1627        "Prefix-list specific description\n"
1628        "Up to 80 characters describing this prefix-list\n")
1629 {
1630         return no_ipv6_prefix_list_description(self, vty, argc, argv);
1631 }
1632
1633
1634 DEFPY (show_ipv6_prefix_list,
1635        show_ipv6_prefix_list_cmd,
1636        "show ipv6 prefix-list [WORD [seq$dseq (1-4294967295)$arg]]",
1637        SHOW_STR
1638        IPV6_STR
1639        PREFIX_LIST_STR
1640        "Name of a prefix list\n"
1641        "sequence number of an entry\n"
1642        "Sequence number\n")
1643 {
1644         enum display_type dtype = normal_display;
1645         if (dseq)
1646                 dtype = sequential_display;
1647
1648         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, arg_str, dtype);
1649 }
1650
1651 DEFPY (show_ipv6_prefix_list_prefix,
1652        show_ipv6_prefix_list_prefix_cmd,
1653        "show ipv6 prefix-list WORD X:X::X:X/M$prefix [longer$dl|first-match$dfm]",
1654        SHOW_STR
1655        IPV6_STR
1656        PREFIX_LIST_STR
1657        "Name of a prefix list\n"
1658        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1659        "Lookup longer prefix\n"
1660        "First matched prefix\n")
1661 {
1662         enum display_type dtype = normal_display;
1663         if (dl)
1664                 dtype = longer_display;
1665         else if (dfm)
1666                 dtype = first_match_display;
1667
1668         return vty_show_prefix_list_prefix(vty, AFI_IP6, prefix_list,
1669                                            prefix_str, dtype);
1670 }
1671
1672 DEFPY (show_ipv6_prefix_list_summary,
1673        show_ipv6_prefix_list_summary_cmd,
1674        "show ipv6 prefix-list summary [WORD$prefix-list]",
1675        SHOW_STR
1676        IPV6_STR
1677        PREFIX_LIST_STR
1678        "Summary of prefix lists\n"
1679        "Name of a prefix list\n")
1680 {
1681         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, NULL,
1682                                     summary_display);
1683 }
1684
1685 DEFPY (show_ipv6_prefix_list_detail,
1686        show_ipv6_prefix_list_detail_cmd,
1687        "show ipv6 prefix-list detail [WORD$prefix-list]",
1688        SHOW_STR
1689        IPV6_STR
1690        PREFIX_LIST_STR
1691        "Detail of prefix lists\n"
1692        "Name of a prefix list\n")
1693 {
1694         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, NULL,
1695                                     detail_display);
1696 }
1697
1698 DEFPY (clear_ipv6_prefix_list,
1699        clear_ipv6_prefix_list_cmd,
1700        "clear ipv6 prefix-list [WORD [X:X::X:X/M$prefix]]",
1701        CLEAR_STR
1702        IPV6_STR
1703        PREFIX_LIST_STR
1704        "Name of a prefix list\n"
1705        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n")
1706 {
1707         return vty_clear_prefix_list(vty, AFI_IP6, prefix_list, prefix_str);
1708 }
1709
1710 /* Configuration write function. */
1711 static int config_write_prefix_afi(afi_t afi, struct vty *vty)
1712 {
1713         struct prefix_list *plist;
1714         struct prefix_list_entry *pentry;
1715         struct prefix_master *master;
1716         int write = 0;
1717
1718         master = prefix_master_get(afi, 0);
1719         if (master == NULL)
1720                 return 0;
1721
1722         if (!master->seqnum) {
1723                 vty_out(vty, "no ip%s prefix-list sequence-number\n",
1724                         afi == AFI_IP ? "" : "v6");
1725                 vty_out(vty, "!\n");
1726         }
1727
1728         for (plist = master->num.head; plist; plist = plist->next) {
1729                 if (plist->desc) {
1730                         vty_out(vty, "ip%s prefix-list %s description %s\n",
1731                                 afi == AFI_IP ? "" : "v6", plist->name,
1732                                 plist->desc);
1733                         write++;
1734                 }
1735
1736                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1737                         vty_out(vty, "ip%s prefix-list %s ",
1738                                 afi == AFI_IP ? "" : "v6", plist->name);
1739
1740                         if (master->seqnum)
1741                                 vty_out(vty, "seq %u ", pentry->seq);
1742
1743                         vty_out(vty, "%s ", prefix_list_type_str(pentry));
1744
1745                         if (pentry->any)
1746                                 vty_out(vty, "any");
1747                         else {
1748                                 struct prefix *p = &pentry->prefix;
1749                                 char buf[BUFSIZ];
1750
1751                                 vty_out(vty, "%s/%d",
1752                                         inet_ntop(p->family, &p->u.prefix, buf,
1753                                                   BUFSIZ),
1754                                         p->prefixlen);
1755
1756                                 if (pentry->ge)
1757                                         vty_out(vty, " ge %d", pentry->ge);
1758                                 if (pentry->le)
1759                                         vty_out(vty, " le %d", pentry->le);
1760                         }
1761                         vty_out(vty, "\n");
1762                         write++;
1763                 }
1764                 /* vty_out (vty, "!\n"); */
1765         }
1766
1767         for (plist = master->str.head; plist; plist = plist->next) {
1768                 if (plist->desc) {
1769                         vty_out(vty, "ip%s prefix-list %s description %s\n",
1770                                 afi == AFI_IP ? "" : "v6", plist->name,
1771                                 plist->desc);
1772                         write++;
1773                 }
1774
1775                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1776                         vty_out(vty, "ip%s prefix-list %s ",
1777                                 afi == AFI_IP ? "" : "v6", plist->name);
1778
1779                         if (master->seqnum)
1780                                 vty_out(vty, "seq %u ", pentry->seq);
1781
1782                         vty_out(vty, "%s", prefix_list_type_str(pentry));
1783
1784                         if (pentry->any)
1785                                 vty_out(vty, " any");
1786                         else {
1787                                 struct prefix *p = &pentry->prefix;
1788                                 char buf[BUFSIZ];
1789
1790                                 vty_out(vty, " %s/%d",
1791                                         inet_ntop(p->family, &p->u.prefix, buf,
1792                                                   BUFSIZ),
1793                                         p->prefixlen);
1794
1795                                 if (pentry->ge)
1796                                         vty_out(vty, " ge %d", pentry->ge);
1797                                 if (pentry->le)
1798                                         vty_out(vty, " le %d", pentry->le);
1799                         }
1800                         vty_out(vty, "\n");
1801                         write++;
1802                 }
1803         }
1804
1805         return write;
1806 }
1807
1808 struct stream *prefix_bgp_orf_entry(struct stream *s, struct prefix_list *plist,
1809                                     u_char init_flag, u_char permit_flag,
1810                                     u_char deny_flag)
1811 {
1812         struct prefix_list_entry *pentry;
1813
1814         if (!plist)
1815                 return s;
1816
1817         for (pentry = plist->head; pentry; pentry = pentry->next) {
1818                 u_char flag = init_flag;
1819                 struct prefix *p = &pentry->prefix;
1820
1821                 flag |= (pentry->type == PREFIX_PERMIT ? permit_flag
1822                                                        : deny_flag);
1823                 stream_putc(s, flag);
1824                 stream_putl(s, (u_int32_t)pentry->seq);
1825                 stream_putc(s, (u_char)pentry->ge);
1826                 stream_putc(s, (u_char)pentry->le);
1827                 stream_put_prefix(s, p);
1828         }
1829
1830         return s;
1831 }
1832
1833 int prefix_bgp_orf_set(char *name, afi_t afi, struct orf_prefix *orfp,
1834                        int permit, int set)
1835 {
1836         struct prefix_list *plist;
1837         struct prefix_list_entry *pentry;
1838
1839         /* ge and le value check */
1840         if (orfp->ge && orfp->ge <= orfp->p.prefixlen)
1841                 return CMD_WARNING_CONFIG_FAILED;
1842         if (orfp->le && orfp->le <= orfp->p.prefixlen)
1843                 return CMD_WARNING_CONFIG_FAILED;
1844         if (orfp->le && orfp->ge > orfp->le)
1845                 return CMD_WARNING_CONFIG_FAILED;
1846
1847         if (orfp->ge && orfp->le == (afi == AFI_IP ? 32 : 128))
1848                 orfp->le = 0;
1849
1850         plist = prefix_list_get(afi, 1, name);
1851         if (!plist)
1852                 return CMD_WARNING_CONFIG_FAILED;
1853
1854         if (set) {
1855                 pentry = prefix_list_entry_make(
1856                         &orfp->p, (permit ? PREFIX_PERMIT : PREFIX_DENY),
1857                         orfp->seq, orfp->le, orfp->ge, 0);
1858
1859                 if (prefix_entry_dup_check(plist, pentry)) {
1860                         prefix_list_entry_free(pentry);
1861                         return CMD_WARNING_CONFIG_FAILED;
1862                 }
1863
1864                 prefix_list_entry_add(plist, pentry);
1865         } else {
1866                 pentry = prefix_list_entry_lookup(
1867                         plist, &orfp->p, (permit ? PREFIX_PERMIT : PREFIX_DENY),
1868                         orfp->seq, orfp->le, orfp->ge);
1869
1870                 if (!pentry)
1871                         return CMD_WARNING_CONFIG_FAILED;
1872
1873                 prefix_list_entry_delete(plist, pentry, 1);
1874         }
1875
1876         return CMD_SUCCESS;
1877 }
1878
1879 void prefix_bgp_orf_remove_all(afi_t afi, char *name)
1880 {
1881         struct prefix_list *plist;
1882
1883         plist = prefix_bgp_orf_lookup(afi, name);
1884         if (plist)
1885                 prefix_list_delete(plist);
1886 }
1887
1888 /* return prefix count */
1889 int prefix_bgp_show_prefix_list(struct vty *vty, afi_t afi, char *name,
1890                                 u_char use_json)
1891 {
1892         struct prefix_list *plist;
1893         struct prefix_list_entry *pentry;
1894         json_object *json = NULL;
1895         json_object *json_prefix = NULL;
1896         json_object *json_list = NULL;
1897
1898         plist = prefix_bgp_orf_lookup(afi, name);
1899         if (!plist)
1900                 return 0;
1901
1902         if (!vty)
1903                 return plist->count;
1904
1905         if (use_json) {
1906                 json = json_object_new_object();
1907                 json_prefix = json_object_new_object();
1908                 json_list = json_object_new_object();
1909
1910                 json_object_int_add(json_prefix, "prefixListCounter",
1911                                     plist->count);
1912                 json_object_string_add(json_prefix, "prefixListName",
1913                                        plist->name);
1914
1915                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1916                         struct prefix *p = &pentry->prefix;
1917                         char buf_a[BUFSIZ];
1918                         char buf_b[BUFSIZ];
1919
1920                         sprintf(buf_a, "%s/%d",
1921                                 inet_ntop(p->family, &p->u.prefix, buf_b,
1922                                           BUFSIZ),
1923                                 p->prefixlen);
1924
1925                         json_object_int_add(json_list, "seq", pentry->seq);
1926                         json_object_string_add(json_list, "seqPrefixListType",
1927                                                prefix_list_type_str(pentry));
1928
1929                         if (pentry->ge)
1930                                 json_object_int_add(json_list, "ge",
1931                                                     pentry->ge);
1932                         if (pentry->le)
1933                                 json_object_int_add(json_list, "le",
1934                                                     pentry->le);
1935
1936                         json_object_object_add(json_prefix, buf_a, json_list);
1937                 }
1938                 if (afi == AFI_IP)
1939                         json_object_object_add(json, "ipPrefixList",
1940                                                json_prefix);
1941                 else
1942                         json_object_object_add(json, "ipv6PrefixList",
1943                                                json_prefix);
1944
1945                 vty_out(vty, "%s\n", json_object_to_json_string_ext(
1946                                              json, JSON_C_TO_STRING_PRETTY));
1947                 json_object_free(json);
1948         } else {
1949                 vty_out(vty, "ip%s prefix-list %s: %d entries\n",
1950                         afi == AFI_IP ? "" : "v6", plist->name, plist->count);
1951
1952                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1953                         struct prefix *p = &pentry->prefix;
1954                         char buf[BUFSIZ];
1955
1956                         vty_out(vty, "   seq %u %s %s/%d", pentry->seq,
1957                                 prefix_list_type_str(pentry),
1958                                 inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ),
1959                                 p->prefixlen);
1960
1961                         if (pentry->ge)
1962                                 vty_out(vty, " ge %d", pentry->ge);
1963                         if (pentry->le)
1964                                 vty_out(vty, " le %d", pentry->le);
1965
1966                         vty_out(vty, "\n");
1967                 }
1968         }
1969         return plist->count;
1970 }
1971
1972 static void prefix_list_reset_afi(afi_t afi, int orf)
1973 {
1974         struct prefix_list *plist;
1975         struct prefix_list *next;
1976         struct prefix_master *master;
1977
1978         master = prefix_master_get(afi, orf);
1979         if (master == NULL)
1980                 return;
1981
1982         for (plist = master->num.head; plist; plist = next) {
1983                 next = plist->next;
1984                 prefix_list_delete(plist);
1985         }
1986         for (plist = master->str.head; plist; plist = next) {
1987                 next = plist->next;
1988                 prefix_list_delete(plist);
1989         }
1990
1991         assert(master->num.head == NULL);
1992         assert(master->num.tail == NULL);
1993
1994         assert(master->str.head == NULL);
1995         assert(master->str.tail == NULL);
1996
1997         master->seqnum = 1;
1998         master->recent = NULL;
1999 }
2000
2001
2002 /* Prefix-list node. */
2003 static struct cmd_node prefix_node = {PREFIX_NODE,
2004                                       "", /* Prefix list has no interface. */
2005                                       1};
2006
2007 static int config_write_prefix_ipv4(struct vty *vty)
2008 {
2009         return config_write_prefix_afi(AFI_IP, vty);
2010 }
2011
2012 static void plist_autocomplete_afi(afi_t afi, vector comps,
2013                                    struct cmd_token *token)
2014 {
2015         struct prefix_list *plist;
2016         struct prefix_master *master;
2017
2018         master = prefix_master_get(afi, 0);
2019         if (master == NULL)
2020                 return;
2021
2022         for (plist = master->str.head; plist; plist = plist->next)
2023                 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, plist->name));
2024         for (plist = master->num.head; plist; plist = plist->next)
2025                 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, plist->name));
2026 }
2027
2028 static void plist_autocomplete(vector comps, struct cmd_token *token)
2029 {
2030         plist_autocomplete_afi(AFI_IP, comps, token);
2031         plist_autocomplete_afi(AFI_IP6, comps, token);
2032 }
2033
2034 static const struct cmd_variable_handler plist_var_handlers[] = {
2035         {/* "prefix-list WORD" */
2036          .varname = "prefix_list",
2037          .completions = plist_autocomplete},
2038         {.completions = NULL}};
2039
2040
2041 static void prefix_list_init_ipv4(void)
2042 {
2043         install_node(&prefix_node, config_write_prefix_ipv4);
2044
2045         install_element(CONFIG_NODE, &ip_prefix_list_cmd);
2046         install_element(CONFIG_NODE, &no_ip_prefix_list_cmd);
2047         install_element(CONFIG_NODE, &no_ip_prefix_list_all_cmd);
2048
2049         install_element(CONFIG_NODE, &ip_prefix_list_description_cmd);
2050         install_element(CONFIG_NODE, &no_ip_prefix_list_description_cmd);
2051         install_element(CONFIG_NODE,
2052                         &no_ip_prefix_list_description_comment_cmd);
2053
2054         install_element(CONFIG_NODE, &ip_prefix_list_sequence_number_cmd);
2055
2056         install_element(VIEW_NODE, &show_ip_prefix_list_cmd);
2057         install_element(VIEW_NODE, &show_ip_prefix_list_prefix_cmd);
2058         install_element(VIEW_NODE, &show_ip_prefix_list_summary_cmd);
2059         install_element(VIEW_NODE, &show_ip_prefix_list_detail_cmd);
2060
2061         install_element(ENABLE_NODE, &clear_ip_prefix_list_cmd);
2062 }
2063
2064 /* Prefix-list node. */
2065 static struct cmd_node prefix_ipv6_node = {
2066         PREFIX_IPV6_NODE, "", /* Prefix list has no interface. */
2067         1};
2068
2069 static int config_write_prefix_ipv6(struct vty *vty)
2070 {
2071         return config_write_prefix_afi(AFI_IP6, vty);
2072 }
2073
2074 static void prefix_list_init_ipv6(void)
2075 {
2076         install_node(&prefix_ipv6_node, config_write_prefix_ipv6);
2077
2078         install_element(CONFIG_NODE, &ipv6_prefix_list_cmd);
2079         install_element(CONFIG_NODE, &no_ipv6_prefix_list_cmd);
2080         install_element(CONFIG_NODE, &no_ipv6_prefix_list_all_cmd);
2081
2082         install_element(CONFIG_NODE, &ipv6_prefix_list_description_cmd);
2083         install_element(CONFIG_NODE, &no_ipv6_prefix_list_description_cmd);
2084         install_element(CONFIG_NODE,
2085                         &no_ipv6_prefix_list_description_comment_cmd);
2086
2087         install_element(CONFIG_NODE, &ipv6_prefix_list_sequence_number_cmd);
2088
2089         install_element(VIEW_NODE, &show_ipv6_prefix_list_cmd);
2090         install_element(VIEW_NODE, &show_ipv6_prefix_list_prefix_cmd);
2091         install_element(VIEW_NODE, &show_ipv6_prefix_list_summary_cmd);
2092         install_element(VIEW_NODE, &show_ipv6_prefix_list_detail_cmd);
2093
2094         install_element(ENABLE_NODE, &clear_ipv6_prefix_list_cmd);
2095 }
2096
2097 void prefix_list_init()
2098 {
2099         cmd_variable_handler_register(plist_var_handlers);
2100
2101         prefix_list_init_ipv4();
2102         prefix_list_init_ipv6();
2103 }
2104
2105 void prefix_list_reset()
2106 {
2107         prefix_list_reset_afi(AFI_IP, 0);
2108         prefix_list_reset_afi(AFI_IP6, 0);
2109         prefix_list_reset_afi(AFI_IP, 1);
2110         prefix_list_reset_afi(AFI_IP6, 1);
2111 }