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         XFREE(MTYPE_TMP, plist->desc);
 330
 331         /* Make sure master's recent changed prefix-list information is
 332            cleared. */
 333         master->recent = NULL;
 334
 335         route_map_notify_dependencies(plist->name, RMAP_EVENT_PLIST_DELETED);
 336
 337         if (master->delete_hook)
 338                 (*master->delete_hook)(plist);
 339
 340         XFREE(MTYPE_MPREFIX_LIST_STR, plist->name);
 341
 342         XFREE(MTYPE_PREFIX_LIST_TRIE, plist->trie);
 343
 344         prefix_list_free(plist);
 345 }
 346
 347 static struct prefix_list_entry *
 348 prefix_list_entry_make(struct prefix *prefix, enum prefix_list_type type,
 349                        int64_t seq, int le, int ge, int any)
 350 {
 351         struct prefix_list_entry *pentry;
 352
 353         pentry = prefix_list_entry_new();
 354
 355         if (any)
 356                 pentry->any = 1;
 357
 358         prefix_copy(&pentry->prefix, prefix);
 359         pentry->type = type;
 360         pentry->seq = seq;
 361         pentry->le = le;
 362         pentry->ge = ge;
 363
 364         return pentry;
 365 }
 366
 367 /* Add hook function. */
 368 void prefix_list_add_hook(void (*func)(struct prefix_list *plist))
 369 {
 370         prefix_master_ipv4.add_hook = func;
 371         prefix_master_ipv6.add_hook = func;
 372 }
 373
 374 /* Delete hook function. */
 375 void prefix_list_delete_hook(void (*func)(struct prefix_list *plist))
 376 {
 377         prefix_master_ipv4.delete_hook = func;
 378         prefix_master_ipv6.delete_hook = func;
 379 }
 380
 381 /* Calculate new sequential number. */
 382 static int64_t prefix_new_seq_get(struct prefix_list *plist)
 383 {
 384         int64_t maxseq;
 385         int64_t newseq;
 386         struct prefix_list_entry *pentry;
 387
 388         maxseq = newseq = 0;
 389
 390         for (pentry = plist->head; pentry; pentry = pentry->next) {
 391                 if (maxseq < pentry->seq)
 392                         maxseq = pentry->seq;
 393         }
 394
 395         newseq = ((maxseq / 5) * 5) + 5;
 396
 397         return (newseq > UINT_MAX) ? UINT_MAX : newseq;
 398 }
 399
 400 /* Return prefix list entry which has same seq number. */
 401 static struct prefix_list_entry *prefix_seq_check(struct prefix_list *plist,
 402                                                   int64_t seq)
 403 {
 404         struct prefix_list_entry *pentry;
 405
 406         for (pentry = plist->head; pentry; pentry = pentry->next)
 407                 if (pentry->seq == seq)
 408                         return pentry;
 409         return NULL;
 410 }
 411
 412 static struct prefix_list_entry *
 413 prefix_list_entry_lookup(struct prefix_list *plist, struct prefix *prefix,
 414                          enum prefix_list_type type, int64_t seq,
 415                          int le, int ge)
 416 {
 417         struct prefix_list_entry *pentry;
 418
 419         for (pentry = plist->head; pentry; pentry = pentry->next)
 420                 if (prefix_same(&pentry->prefix, prefix)
 421                     && pentry->type == type) {
 422                         if (seq >= 0 && pentry->seq != seq)
 423                                 continue;
 424
 425                         if (pentry->le != le)
 426                                 continue;
 427                         if (pentry->ge != ge)
 428                                 continue;
 429
 430                         return pentry;
 431                 }
 432
 433         return NULL;
 434 }
 435
 436 static void trie_walk_affected(size_t validbits, struct pltrie_table *table,
 437                                uint8_t byte, struct prefix_list_entry *object,
 438                                void (*fn)(struct prefix_list_entry *object,
 439                                           struct prefix_list_entry **updptr))
 440 {
 441         uint8_t mask;
 442         uint16_t bwalk;
 443
 444         if (validbits > PLC_BITS) {
 445                 fn(object, &table->entries[byte].final_chain);
 446                 return;
 447         }
 448
 449         mask = (1 << (8 - validbits)) - 1;
 450         for (bwalk = byte & ~mask; bwalk <= byte + mask; bwalk++) {
 451                 fn(object, &table->entries[bwalk].up_chain);
 452         }
 453 }
 454
 455 static void trie_uninstall_fn(struct prefix_list_entry *object,
 456                               struct prefix_list_entry **updptr)
 457 {
 458         for (; *updptr; updptr = &(*updptr)->next_best)
 459                 if (*updptr == object) {
 460                         *updptr = object->next_best;
 461                         break;
 462                 }
 463 }
 464
 465 static int trie_table_empty(struct pltrie_table *table)
 466 {
 467         size_t i;
 468         for (i = 0; i < PLC_LEN; i++)
 469                 if (table->entries[i].next_table || table->entries[i].up_chain)
 470                         return 0;
 471         return 1;
 472 }
 473
 474 static void prefix_list_trie_del(struct prefix_list *plist,
 475                                  struct prefix_list_entry *pentry)
 476 {
 477         size_t depth, maxdepth = plist->master->trie_depth;
 478         uint8_t *bytes = pentry->prefix.u.val;
 479         size_t validbits = pentry->prefix.prefixlen;
 480         struct pltrie_table *table, **tables[PLC_MAXLEVEL];
 481
 482         table = plist->trie;
 483         for (depth = 0; validbits > PLC_BITS && depth < maxdepth - 1; depth++) {
 484                 uint8_t byte = bytes[depth];
 485                 assert(table->entries[byte].next_table);
 486
 487                 tables[depth + 1] = &table->entries[byte].next_table;
 488                 table = table->entries[byte].next_table;
 489
 490                 validbits -= PLC_BITS;
 491         }
 492
 493         trie_walk_affected(validbits, table, bytes[depth], pentry,
 494                            trie_uninstall_fn);
 495
 496         for (; depth > 0; depth--)
 497                 if (trie_table_empty(*tables[depth])) {
 498                         XFREE(MTYPE_PREFIX_LIST_TRIE, *tables[depth]);
 499                         *tables[depth] = NULL;
 500                 }
 501 }
 502
 503
 504 static void prefix_list_entry_delete(struct prefix_list *plist,
 505                                      struct prefix_list_entry *pentry,
 506                                      int update_list)
 507 {
 508         if (plist == NULL || pentry == NULL)
 509                 return;
 510
 511         prefix_list_trie_del(plist, pentry);
 512
 513         if (pentry->prev)
 514                 pentry->prev->next = pentry->next;
 515         else
 516                 plist->head = pentry->next;
 517         if (pentry->next)
 518                 pentry->next->prev = pentry->prev;
 519         else
 520                 plist->tail = pentry->prev;
 521
 522         prefix_list_entry_free(pentry);
 523
 524         plist->count--;
 525
 526         if (update_list) {
 527                 route_map_notify_dependencies(plist->name,
 528                                               RMAP_EVENT_PLIST_DELETED);
 529                 if (plist->master->delete_hook)
 530                         (*plist->master->delete_hook)(plist);
 531
 532                 if (plist->head == NULL && plist->tail == NULL
 533                     && plist->desc == NULL)
 534                         prefix_list_delete(plist);
 535                 else
 536                         plist->master->recent = plist;
 537         }
 538 }
 539
 540 static void trie_install_fn(struct prefix_list_entry *object,
 541                             struct prefix_list_entry **updptr)
 542 {
 543         while (*updptr) {
 544                 if (*updptr == object)
 545                         return;
 546                 if ((*updptr)->prefix.prefixlen < object->prefix.prefixlen)
 547                         break;
 548                 if ((*updptr)->prefix.prefixlen == object->prefix.prefixlen
 549                     && (*updptr)->seq > object->seq)
 550                         break;
 551                 updptr = &(*updptr)->next_best;
 552         }
 553
 554         if (!object->next_best)
 555                 object->next_best = *updptr;
 556         else
 557                 assert(object->next_best == *updptr || !*updptr);
 558
 559         *updptr = object;
 560 }
 561
 562 static void prefix_list_trie_add(struct prefix_list *plist,
 563                                  struct prefix_list_entry *pentry)
 564 {
 565         size_t depth = plist->master->trie_depth;
 566         uint8_t *bytes = pentry->prefix.u.val;
 567         size_t validbits = pentry->prefix.prefixlen;
 568         struct pltrie_table *table;
 569
 570         table = plist->trie;
 571         while (validbits > PLC_BITS && depth > 1) {
 572                 if (!table->entries[*bytes].next_table)
 573                         table->entries[*bytes].next_table =
 574                                 XCALLOC(MTYPE_PREFIX_LIST_TRIE,
 575                                         sizeof(struct pltrie_table));
 576                 table = table->entries[*bytes].next_table;
 577                 bytes++;
 578                 depth--;
 579                 validbits -= PLC_BITS;
 580         }
 581
 582         trie_walk_affected(validbits, table, *bytes, pentry, trie_install_fn);
 583 }
 584
 585 static void prefix_list_entry_add(struct prefix_list *plist,
 586                                   struct prefix_list_entry *pentry)
 587 {
 588         struct prefix_list_entry *replace;
 589         struct prefix_list_entry *point;
 590
 591         /* Automatic asignment of seq no. */
 592         if (pentry->seq == -1)
 593                 pentry->seq = prefix_new_seq_get(plist);
 594
 595         if (plist->tail && pentry->seq > plist->tail->seq)
 596                 point = NULL;
 597         else {
 598                 /* Is there any same seq prefix list entry? */
 599                 replace = prefix_seq_check(plist, pentry->seq);
 600                 if (replace)
 601                         prefix_list_entry_delete(plist, replace, 0);
 602
 603                 /* Check insert point. */
 604                 for (point = plist->head; point; point = point->next)
 605                         if (point->seq >= pentry->seq)
 606                                 break;
 607         }
 608
 609         /* In case of this is the first element of the list. */
 610         pentry->next = point;
 611
 612         if (point) {
 613                 if (point->prev)
 614                         point->prev->next = pentry;
 615                 else
 616                         plist->head = pentry;
 617
 618                 pentry->prev = point->prev;
 619                 point->prev = pentry;
 620         } else {
 621                 if (plist->tail)
 622                         plist->tail->next = pentry;
 623                 else
 624                         plist->head = pentry;
 625
 626                 pentry->prev = plist->tail;
 627                 plist->tail = pentry;
 628         }
 629
 630         prefix_list_trie_add(plist, pentry);
 631
 632         /* Increment count. */
 633         plist->count++;
 634
 635         /* Run hook function. */
 636         if (plist->master->add_hook)
 637                 (*plist->master->add_hook)(plist);
 638
 639         route_map_notify_dependencies(plist->name, RMAP_EVENT_PLIST_ADDED);
 640         plist->master->recent = plist;
 641 }
 642
 643 /* Return string of prefix_list_type. */
 644 static const char *prefix_list_type_str(struct prefix_list_entry *pentry)
 645 {
 646         switch (pentry->type) {
 647         case PREFIX_PERMIT:
 648                 return "permit";
 649         case PREFIX_DENY:
 650                 return "deny";
 651         default:
 652                 return "";
 653         }
 654 }
 655
 656 static int prefix_list_entry_match(struct prefix_list_entry *pentry,
 657                                    const struct prefix *p)
 658 {
 659         int ret;
 660
 661         if (pentry->prefix.family != p->family)
 662                 return 0;
 663
 664         ret = prefix_match(&pentry->prefix, p);
 665         if (!ret)
 666                 return 0;
 667
 668         /* In case of le nor ge is specified, exact match is performed. */
 669         if (!pentry->le && !pentry->ge) {
 670                 if (pentry->prefix.prefixlen != p->prefixlen)
 671                         return 0;
 672         } else {
 673                 if (pentry->le)
 674                         if (p->prefixlen > pentry->le)
 675                                 return 0;
 676
 677                 if (pentry->ge)
 678                         if (p->prefixlen < pentry->ge)
 679                                 return 0;
 680         }
 681         return 1;
 682 }
 683
 684 enum prefix_list_type prefix_list_apply_which_prefix(
 685         struct prefix_list *plist,
 686         const struct prefix **which,
 687         const void *object)
 688 {
 689         struct prefix_list_entry *pentry, *pbest = NULL;
 690
 691         const struct prefix *p = (const struct prefix *)object;
 692         const uint8_t *byte = p->u.val;
 693         size_t depth;
 694         size_t validbits = p->prefixlen;
 695         struct pltrie_table *table;
 696
 697         if (plist == NULL) {
 698                 if (which)
 699                         *which = NULL;
 700                 return PREFIX_DENY;
 701         }
 702
 703         if (plist->count == 0) {
 704                 if (which)
 705                         *which = NULL;
 706                 return PREFIX_PERMIT;
 707         }
 708
 709         depth = plist->master->trie_depth;
 710         table = plist->trie;
 711         while (1) {
 712                 for (pentry = table->entries[*byte].up_chain; pentry;
 713                      pentry = pentry->next_best) {
 714                         if (pbest && pbest->seq < pentry->seq)
 715                                 continue;
 716                         if (prefix_list_entry_match(pentry, p))
 717                                 pbest = pentry;
 718                 }
 719
 720                 if (validbits <= PLC_BITS)
 721                         break;
 722                 validbits -= PLC_BITS;
 723
 724                 if (--depth) {
 725                         if (!table->entries[*byte].next_table)
 726                                 break;
 727
 728                         table = table->entries[*byte].next_table;
 729                         byte++;
 730                         continue;
 731                 }
 732
 733                 for (pentry = table->entries[*byte].final_chain; pentry;
 734                      pentry = pentry->next_best) {
 735                         if (pbest && pbest->seq < pentry->seq)
 736                                 continue;
 737                         if (prefix_list_entry_match(pentry, p))
 738                                 pbest = pentry;
 739                 }
 740                 break;
 741         }
 742
 743         if (which) {
 744                 if (pbest)
 745                         *which = &pbest->prefix;
 746                 else
 747                         *which = NULL;
 748         }
 749
 750         if (pbest == NULL)
 751                 return PREFIX_DENY;
 752
 753         return pbest->type;
 754 }
 755
 756 static void __attribute__((unused)) prefix_list_print(struct prefix_list *plist)
 757 {
 758         struct prefix_list_entry *pentry;
 759
 760         if (plist == NULL)
 761                 return;
 762
 763         printf("ip prefix-list %s: %d entries\n", plist->name, plist->count);
 764
 765         for (pentry = plist->head; pentry; pentry = pentry->next) {
 766                 if (pentry->any)
 767                         printf("any %s\n", prefix_list_type_str(pentry));
 768                 else {
 769                         struct prefix *p;
 770                         char buf[BUFSIZ];
 771
 772                         p = &pentry->prefix;
 773
 774                         printf("  seq %" PRId64 " %s %s/%d", pentry->seq,
 775                                prefix_list_type_str(pentry),
 776                                inet_ntop(p->family, p->u.val, buf, BUFSIZ),
 777                                p->prefixlen);
 778                         if (pentry->ge)
 779                                 printf(" ge %d", pentry->ge);
 780                         if (pentry->le)
 781                                 printf(" le %d", pentry->le);
 782                         printf("\n");
 783                 }
 784         }
 785 }
 786
 787 /* Retrun 1 when plist already include pentry policy. */
 788 static struct prefix_list_entry *
 789 prefix_entry_dup_check(struct prefix_list *plist, struct prefix_list_entry *new)
 790 {
 791         size_t depth, maxdepth = plist->master->trie_depth;
 792         uint8_t byte, *bytes = new->prefix.u.val;
 793         size_t validbits = new->prefix.prefixlen;
 794         struct pltrie_table *table;
 795         struct prefix_list_entry *pentry;
 796         int64_t seq = 0;
 797
 798         if (new->seq == -1)
 799                 seq = prefix_new_seq_get(plist);
 800         else
 801                 seq = new->seq;
 802
 803         table = plist->trie;
 804         for (depth = 0; validbits > PLC_BITS && depth < maxdepth - 1; depth++) {
 805                 byte = bytes[depth];
 806                 if (!table->entries[byte].next_table)
 807                         return NULL;
 808
 809                 table = table->entries[byte].next_table;
 810                 validbits -= PLC_BITS;
 811         }
 812
 813         byte = bytes[depth];
 814         if (validbits > PLC_BITS)
 815                 pentry = table->entries[byte].final_chain;
 816         else
 817                 pentry = table->entries[byte].up_chain;
 818
 819         for (; pentry; pentry = pentry->next_best) {
 820                 if (prefix_same(&pentry->prefix, &new->prefix)
 821                     && pentry->type == new->type && pentry->le == new->le
 822                     && pentry->ge == new->ge && pentry->seq != seq)
 823                         return pentry;
 824         }
 825         return NULL;
 826 }
 827
 828 static int vty_invalid_prefix_range(struct vty *vty, const char *prefix)
 829 {
 830         vty_out(vty,
 831                 "%% Invalid prefix range for %s, make sure: len < ge-value <= le-value\n",
 832                 prefix);
 833         return CMD_WARNING_CONFIG_FAILED;
 834 }
 835
 836 static int vty_prefix_list_install(struct vty *vty, afi_t afi, const char *name,
 837                                    const char *seq, const char *typestr,
 838                                    const char *prefix, const char *ge,
 839                                    const char *le)
 840 {
 841         int ret;
 842         enum prefix_list_type type;
 843         struct prefix_list *plist;
 844         struct prefix_list_entry *pentry;
 845         struct prefix_list_entry *dup;
 846         struct prefix p, p_tmp;
 847         int any = 0;
 848         int64_t seqnum = -1;
 849         int lenum = 0;
 850         int genum = 0;
 851
 852         if (name == NULL || prefix == NULL || typestr == NULL) {
 853                 vty_out(vty, "%% Missing prefix or type\n");
 854                 return CMD_WARNING_CONFIG_FAILED;
 855         }
 856
 857         /* Sequential number. */
 858         if (seq)
 859                 seqnum = (int64_t)atol(seq);
 860
 861         /* ge and le number */
 862         if (ge)
 863                 genum = atoi(ge);
 864         if (le)
 865                 lenum = atoi(le);
 866
 867         /* Check filter type. */
 868         if (strncmp("permit", typestr, 1) == 0)
 869                 type = PREFIX_PERMIT;
 870         else if (strncmp("deny", typestr, 1) == 0)
 871                 type = PREFIX_DENY;
 872         else {
 873                 vty_out(vty, "%% prefix type must be permit or deny\n");
 874                 return CMD_WARNING_CONFIG_FAILED;
 875         }
 876
 877         /* "any" is special token for matching any IPv4 addresses.  */
 878         switch (afi) {
 879         case AFI_IP:
 880                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
 881                         ret = str2prefix_ipv4("0.0.0.0/0",
 882                                               (struct prefix_ipv4 *)&p);
 883                         genum = 0;
 884                         lenum = IPV4_MAX_BITLEN;
 885                         any = 1;
 886                 } else
 887                         ret = str2prefix_ipv4(prefix, (struct prefix_ipv4 *)&p);
 888
 889                 if (ret <= 0) {
 890                         vty_out(vty, "%% Malformed IPv4 prefix\n");
 891                         return CMD_WARNING_CONFIG_FAILED;
 892                 }
 893
 894                 /* make a copy to verify prefix matches mask length */
 895                 prefix_copy(&p_tmp, &p);
 896                 apply_mask_ipv4((struct prefix_ipv4 *)&p_tmp);
 897
 898                 break;
 899         case AFI_IP6:
 900                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
 901                         ret = str2prefix_ipv6("::/0", (struct prefix_ipv6 *)&p);
 902                         genum = 0;
 903                         lenum = IPV6_MAX_BITLEN;
 904                         any = 1;
 905                 } else
 906                         ret = str2prefix_ipv6(prefix, (struct prefix_ipv6 *)&p);
 907
 908                 if (ret <= 0) {
 909                         vty_out(vty, "%% Malformed IPv6 prefix\n");
 910                         return CMD_WARNING_CONFIG_FAILED;
 911                 }
 912
 913                 /* make a copy to verify prefix matches mask length */
 914                 prefix_copy(&p_tmp, &p);
 915                 apply_mask_ipv6((struct prefix_ipv6 *)&p_tmp);
 916
 917                 break;
 918         case AFI_L2VPN:
 919         default:
 920                 vty_out(vty, "%% Unrecognized AFI (%d)\n", afi);
 921                 return CMD_WARNING_CONFIG_FAILED;
 922                 break;
 923         }
 924
 925         /* If prefix has bits not under the mask, adjust it to fit */
 926         if (!prefix_same(&p_tmp, &p)) {
 927                 char buf[PREFIX2STR_BUFFER];
 928                 char buf_tmp[PREFIX2STR_BUFFER];
 929                 prefix2str(&p, buf, sizeof(buf));
 930                 prefix2str(&p_tmp, buf_tmp, sizeof(buf_tmp));
 931                 vty_out(vty,
 932                         "%% Prefix-list %s prefix changed from %s to %s to match length\n",
 933                         name, buf, buf_tmp);
 934                 zlog_info(
 935                         "Prefix-list %s prefix changed from %s to %s to match length",
 936                         name, buf, buf_tmp);
 937                 p = p_tmp;
 938         }
 939
 940         /* ge and le check. */
 941         if (genum && (genum <= p.prefixlen))
 942                 return vty_invalid_prefix_range(vty, prefix);
 943
 944         if (lenum && (lenum < p.prefixlen))
 945                 return vty_invalid_prefix_range(vty, prefix);
 946
 947         if (lenum && (genum > lenum))
 948                 return vty_invalid_prefix_range(vty, prefix);
 949
 950         if (genum && (lenum == (afi == AFI_IP ? 32 : 128)))
 951                 lenum = 0;
 952
 953         /* Get prefix_list with name. */
 954         plist = prefix_list_get(afi, 0, name);
 955
 956         /* Make prefix entry. */
 957         pentry = prefix_list_entry_make(&p, type, seqnum, lenum, genum, any);
 958
 959         /* Check same policy. */
 960         dup = prefix_entry_dup_check(plist, pentry);
 961
 962         if (dup) {
 963                 prefix_list_entry_free(pentry);
 964                 return CMD_SUCCESS;
 965         }
 966
 967         /* Install new filter to the access_list. */
 968         prefix_list_entry_add(plist, pentry);
 969
 970         return CMD_SUCCESS;
 971 }
 972
 973 static int vty_prefix_list_uninstall(struct vty *vty, afi_t afi,
 974                                      const char *name, const char *seq,
 975                                      const char *typestr, const char *prefix,
 976                                      const char *ge, const char *le)
 977 {
 978         int ret;
 979         enum prefix_list_type type;
 980         struct prefix_list *plist;
 981         struct prefix_list_entry *pentry;
 982         struct prefix p;
 983         int64_t seqnum = -1;
 984         int lenum = 0;
 985         int genum = 0;
 986
 987         /* Check prefix list name. */
 988         plist = prefix_list_lookup(afi, name);
 989         if (!plist) {
 990                 vty_out(vty, "%% Can't find specified prefix-list\n");
 991                 return CMD_WARNING_CONFIG_FAILED;
 992         }
 993
 994         /* Only prefix-list name specified, delete the entire prefix-list. */
 995         if (seq == NULL && typestr == NULL && prefix == NULL && ge == NULL
 996             && le == NULL) {
 997                 prefix_list_delete(plist);
 998                 return CMD_SUCCESS;
 999         }
1000
1001         /* Check sequence number. */
1002         if (seq)
1003                 seqnum = (int64_t)atol(seq);
1004
1005         /* Sequence number specified, but nothing else. */
1006         if (seq && typestr == NULL && prefix == NULL && ge == NULL
1007             && le == NULL) {
1008                 pentry = prefix_seq_check(plist, seqnum);
1009
1010                 if (pentry == NULL) {
1011                         vty_out(vty,
1012                                 "%% Can't find prefix-list %s with sequence number %lu\n",
1013                                 name, seqnum);
1014                         return CMD_WARNING_CONFIG_FAILED;
1015                 }
1016
1017                 prefix_list_entry_delete(plist, pentry, 1);
1018                 return CMD_SUCCESS;
1019         }
1020
1021         /* ge and le number */
1022         if (ge)
1023                 genum = atoi(ge);
1024         if (le)
1025                 lenum = atoi(le);
1026
1027         /* We must have, at a minimum, both the type and prefix here */
1028         if ((typestr == NULL) || (prefix == NULL))
1029                 return CMD_WARNING_CONFIG_FAILED;
1030
1031         /* Check of filter type. */
1032         if (strncmp("permit", typestr, 1) == 0)
1033                 type = PREFIX_PERMIT;
1034         else if (strncmp("deny", typestr, 1) == 0)
1035                 type = PREFIX_DENY;
1036         else {
1037                 vty_out(vty, "%% prefix type must be permit or deny\n");
1038                 return CMD_WARNING_CONFIG_FAILED;
1039         }
1040
1041         /* "any" is special token for matching any IPv4 addresses.  */
1042         if (afi == AFI_IP) {
1043                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
1044                         ret = str2prefix_ipv4("0.0.0.0/0",
1045                                               (struct prefix_ipv4 *)&p);
1046                         genum = 0;
1047                         lenum = IPV4_MAX_BITLEN;
1048                 } else
1049                         ret = str2prefix_ipv4(prefix, (struct prefix_ipv4 *)&p);
1050
1051                 if (ret <= 0) {
1052                         vty_out(vty, "%% Malformed IPv4 prefix\n");
1053                         return CMD_WARNING_CONFIG_FAILED;
1054                 }
1055         } else if (afi == AFI_IP6) {
1056                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
1057                         ret = str2prefix_ipv6("::/0", (struct prefix_ipv6 *)&p);
1058                         genum = 0;
1059                         lenum = IPV6_MAX_BITLEN;
1060                 } else
1061                         ret = str2prefix_ipv6(prefix, (struct prefix_ipv6 *)&p);
1062
1063                 if (ret <= 0) {
1064                         vty_out(vty, "%% Malformed IPv6 prefix\n");
1065                         return CMD_WARNING_CONFIG_FAILED;
1066                 }
1067         }
1068
1069         /* Lookup prefix entry. */
1070         pentry =
1071                 prefix_list_entry_lookup(plist, &p, type, seqnum, lenum, genum);
1072
1073         if (pentry == NULL) {
1074                 vty_out(vty, "%% Can't find specified prefix-list\n");
1075                 return CMD_WARNING_CONFIG_FAILED;
1076         }
1077
1078         /* Install new filter to the access_list. */
1079         prefix_list_entry_delete(plist, pentry, 1);
1080
1081         return CMD_SUCCESS;
1082 }
1083
1084 static int vty_prefix_list_desc_unset(struct vty *vty, afi_t afi,
1085                                       const char *name)
1086 {
1087         struct prefix_list *plist;
1088
1089         plist = prefix_list_lookup(afi, name);
1090         if (!plist) {
1091                 vty_out(vty, "%% Can't find specified prefix-list\n");
1092                 return CMD_WARNING_CONFIG_FAILED;
1093         }
1094
1095         if (plist->desc) {
1096                 XFREE(MTYPE_TMP, plist->desc);
1097                 plist->desc = NULL;
1098         }
1099
1100         if (plist->head == NULL && plist->tail == NULL && plist->desc == NULL)
1101                 prefix_list_delete(plist);
1102
1103         return CMD_SUCCESS;
1104 }
1105
1106 enum display_type {
1107         normal_display,
1108         summary_display,
1109         detail_display,
1110         sequential_display,
1111         longer_display,
1112         first_match_display
1113 };
1114
1115 static void vty_show_prefix_entry(struct vty *vty, afi_t afi,
1116                                   struct prefix_list *plist,
1117                                   struct prefix_master *master,
1118                                   enum display_type dtype, int seqnum)
1119 {
1120         struct prefix_list_entry *pentry;
1121
1122         /* Print the name of the protocol */
1123         vty_out(vty, "%s: ", frr_protoname);
1124
1125         if (dtype == normal_display) {
1126                 vty_out(vty, "ip%s prefix-list %s: %d entries\n",
1127                         afi == AFI_IP ? "" : "v6", plist->name, plist->count);
1128                 if (plist->desc)
1129                         vty_out(vty, "   Description: %s\n", plist->desc);
1130         } else if (dtype == summary_display || dtype == detail_display) {
1131                 vty_out(vty, "ip%s prefix-list %s:\n",
1132                         afi == AFI_IP ? "" : "v6", plist->name);
1133
1134                 if (plist->desc)
1135                         vty_out(vty, "   Description: %s\n", plist->desc);
1136
1137                 vty_out(vty,
1138                         "   count: %d, range entries: %d, sequences: %" PRId64 " - %" PRId64 "\n",
1139                         plist->count, plist->rangecount,
1140                         plist->head ? plist->head->seq : 0,
1141                         plist->tail ? plist->tail->seq : 0);
1142         }
1143
1144         if (dtype != summary_display) {
1145                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1146                         if (dtype == sequential_display
1147                             && pentry->seq != seqnum)
1148                                 continue;
1149
1150                         vty_out(vty, "   ");
1151
1152                         if (master->seqnum)
1153                                 vty_out(vty, "seq %" PRId64 " ", pentry->seq);
1154
1155                         vty_out(vty, "%s ", prefix_list_type_str(pentry));
1156
1157                         if (pentry->any)
1158                                 vty_out(vty, "any");
1159                         else {
1160                                 struct prefix *p = &pentry->prefix;
1161                                 char buf[BUFSIZ];
1162
1163                                 vty_out(vty, "%s/%d",
1164                                         inet_ntop(p->family, p->u.val, buf,
1165                                                   BUFSIZ),
1166                                         p->prefixlen);
1167
1168                                 if (pentry->ge)
1169                                         vty_out(vty, " ge %d", pentry->ge);
1170                                 if (pentry->le)
1171                                         vty_out(vty, " le %d", pentry->le);
1172                         }
1173
1174                         if (dtype == detail_display
1175                             || dtype == sequential_display)
1176                                 vty_out(vty, " (hit count: %ld, refcount: %ld)",
1177                                         pentry->hitcnt, pentry->refcnt);
1178
1179                         vty_out(vty, "\n");
1180                 }
1181         }
1182 }
1183
1184 static int vty_show_prefix_list(struct vty *vty, afi_t afi, const char *name,
1185                                 const char *seq, enum display_type dtype)
1186 {
1187         struct prefix_list *plist;
1188         struct prefix_master *master;
1189         int64_t seqnum = 0;
1190
1191         master = prefix_master_get(afi, 0);
1192         if (master == NULL)
1193                 return CMD_WARNING;
1194
1195         if (seq)
1196                 seqnum = (int64_t)atol(seq);
1197
1198         if (name) {
1199                 plist = prefix_list_lookup(afi, name);
1200                 if (!plist) {
1201                         vty_out(vty, "%% Can't find specified prefix-list\n");
1202                         return CMD_WARNING;
1203                 }
1204                 vty_show_prefix_entry(vty, afi, plist, master, dtype, seqnum);
1205         } else {
1206                 if (dtype == detail_display || dtype == summary_display) {
1207                         if (master->recent)
1208                                 vty_out(vty,
1209                                         "Prefix-list with the last deletion/insertion: %s\n",
1210                                         master->recent->name);
1211                 }
1212
1213                 for (plist = master->num.head; plist; plist = plist->next)
1214                         vty_show_prefix_entry(vty, afi, plist, master, dtype,
1215                                               seqnum);
1216
1217                 for (plist = master->str.head; plist; plist = plist->next)
1218                         vty_show_prefix_entry(vty, afi, plist, master, dtype,
1219                                               seqnum);
1220         }
1221
1222         return CMD_SUCCESS;
1223 }
1224
1225 static int vty_show_prefix_list_prefix(struct vty *vty, afi_t afi,
1226                                        const char *name, const char *prefix,
1227                                        enum display_type type)
1228 {
1229         struct prefix_list *plist;
1230         struct prefix_list_entry *pentry;
1231         struct prefix p;
1232         int ret;
1233         int match;
1234
1235         plist = prefix_list_lookup(afi, name);
1236         if (!plist) {
1237                 vty_out(vty, "%% Can't find specified prefix-list\n");
1238                 return CMD_WARNING;
1239         }
1240
1241         ret = str2prefix(prefix, &p);
1242         if (ret <= 0) {
1243                 vty_out(vty, "%% prefix is malformed\n");
1244                 return CMD_WARNING;
1245         }
1246
1247         for (pentry = plist->head; pentry; pentry = pentry->next) {
1248                 match = 0;
1249
1250                 if (type == normal_display || type == first_match_display)
1251                         if (prefix_same(&p, &pentry->prefix))
1252                                 match = 1;
1253
1254                 if (type == longer_display) {
1255                         if ((p.family == pentry->prefix.family)
1256                             && (prefix_match(&p, &pentry->prefix)))
1257                                 match = 1;
1258                 }
1259
1260                 if (match) {
1261                         vty_out(vty, "   seq %" PRId64 " %s ", pentry->seq,
1262                                 prefix_list_type_str(pentry));
1263
1264                         if (pentry->any)
1265                                 vty_out(vty, "any");
1266                         else {
1267                                 struct prefix *pf = &pentry->prefix;
1268                                 char buf[BUFSIZ];
1269
1270                                 vty_out(vty, "%s/%d",
1271                                         inet_ntop(pf->family, pf->u.val, buf,
1272                                                   BUFSIZ),
1273                                         pf->prefixlen);
1274
1275                                 if (pentry->ge)
1276                                         vty_out(vty, " ge %d", pentry->ge);
1277                                 if (pentry->le)
1278                                         vty_out(vty, " le %d", pentry->le);
1279                         }
1280
1281                         if (type == normal_display
1282                             || type == first_match_display)
1283                                 vty_out(vty, " (hit count: %ld, refcount: %ld)",
1284                                         pentry->hitcnt, pentry->refcnt);
1285
1286                         vty_out(vty, "\n");
1287
1288                         if (type == first_match_display)
1289                                 return CMD_SUCCESS;
1290                 }
1291         }
1292         return CMD_SUCCESS;
1293 }
1294
1295 static int vty_clear_prefix_list(struct vty *vty, afi_t afi, const char *name,
1296                                  const char *prefix)
1297 {
1298         struct prefix_master *master;
1299         struct prefix_list *plist;
1300         struct prefix_list_entry *pentry;
1301         int ret;
1302         struct prefix p;
1303
1304         master = prefix_master_get(afi, 0);
1305         if (master == NULL)
1306                 return CMD_WARNING;
1307
1308         if (name == NULL && prefix == NULL) {
1309                 for (plist = master->num.head; plist; plist = plist->next)
1310                         for (pentry = plist->head; pentry;
1311                              pentry = pentry->next)
1312                                 pentry->hitcnt = 0;
1313
1314                 for (plist = master->str.head; plist; plist = plist->next)
1315                         for (pentry = plist->head; pentry;
1316                              pentry = pentry->next)
1317                                 pentry->hitcnt = 0;
1318         } else {
1319                 plist = prefix_list_lookup(afi, name);
1320                 if (!plist) {
1321                         vty_out(vty, "%% Can't find specified prefix-list\n");
1322                         return CMD_WARNING;
1323                 }
1324
1325                 if (prefix) {
1326                         ret = str2prefix(prefix, &p);
1327                         if (ret <= 0) {
1328                                 vty_out(vty, "%% prefix is malformed\n");
1329                                 return CMD_WARNING;
1330                         }
1331                 }
1332
1333                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1334                         if (prefix) {
1335                                 if (pentry->prefix.family == p.family
1336                                     && prefix_match(&pentry->prefix, &p))
1337                                         pentry->hitcnt = 0;
1338                         } else
1339                                 pentry->hitcnt = 0;
1340                 }
1341         }
1342         return CMD_SUCCESS;
1343 }
1344
1345 #ifndef VTYSH_EXTRACT_PL
1346 #include "lib/plist_clippy.c"
1347 #endif
1348
1349 DEFPY (ip_prefix_list,
1350        ip_prefix_list_cmd,
1351        "ip prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|A.B.C.D/M$dest [{ge (0-32)|le (0-32)}]>",
1352        IP_STR
1353        PREFIX_LIST_STR
1354        "Name of a prefix list\n"
1355        "sequence number of an entry\n"
1356        "Sequence number\n"
1357        "Specify packets to reject\n"
1358        "Specify packets to forward\n"
1359        "Any prefix match.  Same as \"0.0.0.0/0 le 32\"\n"
1360        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1361        "Minimum prefix length to be matched\n"
1362        "Minimum prefix length\n"
1363        "Maximum prefix length to be matched\n"
1364        "Maximum prefix length\n")
1365 {
1366         return vty_prefix_list_install(vty, AFI_IP, prefix_list, seq_str,
1367                                        action, dest, ge_str, le_str);
1368 }
1369
1370 DEFPY (no_ip_prefix_list,
1371        no_ip_prefix_list_cmd,
1372        "no ip prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|A.B.C.D/M$dest [{ge (0-32)|le (0-32)}]>",
1373        NO_STR
1374        IP_STR
1375        PREFIX_LIST_STR
1376        "Name of a prefix list\n"
1377        "sequence number of an entry\n"
1378        "Sequence number\n"
1379        "Specify packets to reject\n"
1380        "Specify packets to forward\n"
1381        "Any prefix match.  Same as \"0.0.0.0/0 le 32\"\n"
1382        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1383        "Minimum prefix length to be matched\n"
1384        "Minimum prefix length\n"
1385        "Maximum prefix length to be matched\n"
1386        "Maximum prefix length\n")
1387 {
1388         return vty_prefix_list_uninstall(vty, AFI_IP, prefix_list, seq_str,
1389                                          action, dest, ge_str, le_str);
1390 }
1391
1392 DEFPY(no_ip_prefix_list_seq, no_ip_prefix_list_seq_cmd,
1393       "no ip prefix-list WORD seq (1-4294967295)",
1394       NO_STR IP_STR PREFIX_LIST_STR
1395       "Name of a prefix list\n"
1396       "sequence number of an entry\n"
1397       "Sequence number\n")
1398 {
1399         return vty_prefix_list_uninstall(vty, AFI_IP, prefix_list, seq_str,
1400                                          NULL, NULL, NULL, NULL);
1401 }
1402
1403 DEFPY (no_ip_prefix_list_all,
1404        no_ip_prefix_list_all_cmd,
1405        "no ip prefix-list WORD",
1406        NO_STR
1407        IP_STR
1408        PREFIX_LIST_STR
1409        "Name of a prefix list\n")
1410 {
1411         return vty_prefix_list_uninstall(vty, AFI_IP, prefix_list, NULL, NULL,
1412                                          NULL, NULL, NULL);
1413 }
1414
1415 DEFPY (ip_prefix_list_sequence_number,
1416        ip_prefix_list_sequence_number_cmd,
1417        "[no] ip prefix-list sequence-number",
1418        NO_STR
1419        IP_STR
1420        PREFIX_LIST_STR
1421        "Include/exclude sequence numbers in NVGEN\n")
1422 {
1423         prefix_master_ipv4.seqnum = no ? false : true;
1424         return CMD_SUCCESS;
1425 }
1426
1427 DEFUN (ip_prefix_list_description,
1428        ip_prefix_list_description_cmd,
1429        "ip prefix-list WORD description LINE...",
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         int idx_word = 2;
1437         int idx_line = 4;
1438         struct prefix_list *plist;
1439
1440         plist = prefix_list_get(AFI_IP, 0, argv[idx_word]->arg);
1441
1442         if (plist->desc) {
1443                 XFREE(MTYPE_TMP, plist->desc);
1444                 plist->desc = NULL;
1445         }
1446         plist->desc = argv_concat(argv, argc, idx_line);
1447
1448         return CMD_SUCCESS;
1449 }
1450
1451 DEFUN (no_ip_prefix_list_description,
1452        no_ip_prefix_list_description_cmd,
1453        "no ip prefix-list WORD description",
1454        NO_STR
1455        IP_STR
1456        PREFIX_LIST_STR
1457        "Name of a prefix list\n"
1458        "Prefix-list specific description\n")
1459 {
1460         int idx_word = 3;
1461         return vty_prefix_list_desc_unset(vty, AFI_IP, argv[idx_word]->arg);
1462 }
1463
1464 /* ALIAS_FIXME */
1465 DEFUN (no_ip_prefix_list_description_comment,
1466        no_ip_prefix_list_description_comment_cmd,
1467        "no ip prefix-list WORD description LINE...",
1468        NO_STR
1469        IP_STR
1470        PREFIX_LIST_STR
1471        "Name of a prefix list\n"
1472        "Prefix-list specific description\n"
1473        "Up to 80 characters describing this prefix-list\n")
1474 {
1475         return no_ip_prefix_list_description(self, vty, argc, argv);
1476 }
1477
1478 DEFPY (show_ip_prefix_list,
1479        show_ip_prefix_list_cmd,
1480        "show ip prefix-list [WORD [seq$dseq (1-4294967295)$arg]]",
1481        SHOW_STR
1482        IP_STR
1483        PREFIX_LIST_STR
1484        "Name of a prefix list\n"
1485        "sequence number of an entry\n"
1486        "Sequence number\n")
1487 {
1488         enum display_type dtype = normal_display;
1489         if (dseq)
1490                 dtype = sequential_display;
1491
1492         return vty_show_prefix_list(vty, AFI_IP, prefix_list, arg_str, dtype);
1493 }
1494
1495 DEFPY (show_ip_prefix_list_prefix,
1496        show_ip_prefix_list_prefix_cmd,
1497        "show ip prefix-list WORD A.B.C.D/M$prefix [longer$dl|first-match$dfm]",
1498        SHOW_STR
1499        IP_STR
1500        PREFIX_LIST_STR
1501        "Name of a prefix list\n"
1502        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1503        "Lookup longer prefix\n"
1504        "First matched prefix\n")
1505 {
1506         enum display_type dtype = normal_display;
1507         if (dl)
1508                 dtype = longer_display;
1509         else if (dfm)
1510                 dtype = first_match_display;
1511
1512         return vty_show_prefix_list_prefix(vty, AFI_IP, prefix_list, prefix_str,
1513                                            dtype);
1514 }
1515
1516 DEFPY (show_ip_prefix_list_summary,
1517        show_ip_prefix_list_summary_cmd,
1518        "show ip prefix-list summary [WORD$prefix_list]",
1519        SHOW_STR
1520        IP_STR
1521        PREFIX_LIST_STR
1522        "Summary of prefix lists\n"
1523        "Name of a prefix list\n")
1524 {
1525         return vty_show_prefix_list(vty, AFI_IP, prefix_list, NULL,
1526                                     summary_display);
1527 }
1528
1529 DEFPY (show_ip_prefix_list_detail,
1530        show_ip_prefix_list_detail_cmd,
1531        "show ip prefix-list detail [WORD$prefix_list]",
1532        SHOW_STR
1533        IP_STR
1534        PREFIX_LIST_STR
1535        "Detail of prefix lists\n"
1536        "Name of a prefix list\n")
1537 {
1538         return vty_show_prefix_list(vty, AFI_IP, prefix_list, NULL,
1539                                     detail_display);
1540 }
1541
1542 DEFPY (clear_ip_prefix_list,
1543        clear_ip_prefix_list_cmd,
1544        "clear ip prefix-list [WORD [A.B.C.D/M$prefix]]",
1545        CLEAR_STR
1546        IP_STR
1547        PREFIX_LIST_STR
1548        "Name of a prefix list\n"
1549        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n")
1550 {
1551         return vty_clear_prefix_list(vty, AFI_IP, prefix_list, prefix_str);
1552 }
1553
1554 DEFPY (ipv6_prefix_list,
1555        ipv6_prefix_list_cmd,
1556        "ipv6 prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|X:X::X:X/M$dest [{ge (0-128)|le (0-128)}]>",
1557        IPV6_STR
1558        PREFIX_LIST_STR
1559        "Name of a prefix list\n"
1560        "sequence number of an entry\n"
1561        "Sequence number\n"
1562        "Specify packets to reject\n"
1563        "Specify packets to forward\n"
1564        "Any prefix match.  Same as \"::0/0 le 128\"\n"
1565        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1566        "Maximum prefix length to be matched\n"
1567        "Maximum prefix length\n"
1568        "Minimum prefix length to be matched\n"
1569        "Minimum prefix length\n")
1570 {
1571         return vty_prefix_list_install(vty, AFI_IP6, prefix_list, seq_str,
1572                                        action, dest, ge_str, le_str);
1573 }
1574
1575 DEFPY (no_ipv6_prefix_list,
1576        no_ipv6_prefix_list_cmd,
1577        "no ipv6 prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|X:X::X:X/M$dest [{ge (0-128)|le (0-128)}]>",
1578        NO_STR
1579        IPV6_STR
1580        PREFIX_LIST_STR
1581        "Name of a prefix list\n"
1582        "sequence number of an entry\n"
1583        "Sequence number\n"
1584        "Specify packets to reject\n"
1585        "Specify packets to forward\n"
1586        "Any prefix match.  Same as \"::0/0 le 128\"\n"
1587        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1588        "Maximum prefix length to be matched\n"
1589        "Maximum prefix length\n"
1590        "Minimum prefix length to be matched\n"
1591        "Minimum prefix length\n")
1592 {
1593         return vty_prefix_list_uninstall(vty, AFI_IP6, prefix_list, seq_str,
1594                                          action, dest, ge_str, le_str);
1595 }
1596
1597 DEFPY (no_ipv6_prefix_list_all,
1598        no_ipv6_prefix_list_all_cmd,
1599        "no ipv6 prefix-list WORD",
1600        NO_STR
1601        IPV6_STR
1602        PREFIX_LIST_STR
1603        "Name of a prefix list\n")
1604 {
1605         return vty_prefix_list_uninstall(vty, AFI_IP6, prefix_list, NULL, NULL,
1606                                          NULL, NULL, NULL);
1607 }
1608
1609 DEFPY (ipv6_prefix_list_sequence_number,
1610        ipv6_prefix_list_sequence_number_cmd,
1611        "[no] ipv6 prefix-list sequence-number",
1612        NO_STR
1613        IPV6_STR
1614        PREFIX_LIST_STR
1615        "Include/exclude sequence numbers in NVGEN\n")
1616 {
1617         prefix_master_ipv6.seqnum = no ? false : true;
1618         return CMD_SUCCESS;
1619 }
1620
1621 DEFUN (ipv6_prefix_list_description,
1622        ipv6_prefix_list_description_cmd,
1623        "ipv6 prefix-list WORD description LINE...",
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         int idx_word = 2;
1631         int iddx_line = 4;
1632         struct prefix_list *plist;
1633
1634         plist = prefix_list_get(AFI_IP6, 0, argv[idx_word]->arg);
1635
1636         if (plist->desc) {
1637                 XFREE(MTYPE_TMP, plist->desc);
1638                 plist->desc = NULL;
1639         }
1640         plist->desc = argv_concat(argv, argc, iddx_line);
1641
1642         return CMD_SUCCESS;
1643 }
1644
1645 DEFUN (no_ipv6_prefix_list_description,
1646        no_ipv6_prefix_list_description_cmd,
1647        "no ipv6 prefix-list WORD description",
1648        NO_STR
1649        IPV6_STR
1650        PREFIX_LIST_STR
1651        "Name of a prefix list\n"
1652        "Prefix-list specific description\n")
1653 {
1654         int idx_word = 3;
1655         return vty_prefix_list_desc_unset(vty, AFI_IP6, argv[idx_word]->arg);
1656 }
1657
1658 /* ALIAS_FIXME */
1659 DEFUN (no_ipv6_prefix_list_description_comment,
1660        no_ipv6_prefix_list_description_comment_cmd,
1661        "no ipv6 prefix-list WORD description LINE...",
1662        NO_STR
1663        IPV6_STR
1664        PREFIX_LIST_STR
1665        "Name of a prefix list\n"
1666        "Prefix-list specific description\n"
1667        "Up to 80 characters describing this prefix-list\n")
1668 {
1669         return no_ipv6_prefix_list_description(self, vty, argc, argv);
1670 }
1671
1672
1673 DEFPY (show_ipv6_prefix_list,
1674        show_ipv6_prefix_list_cmd,
1675        "show ipv6 prefix-list [WORD [seq$dseq (1-4294967295)$arg]]",
1676        SHOW_STR
1677        IPV6_STR
1678        PREFIX_LIST_STR
1679        "Name of a prefix list\n"
1680        "sequence number of an entry\n"
1681        "Sequence number\n")
1682 {
1683         enum display_type dtype = normal_display;
1684         if (dseq)
1685                 dtype = sequential_display;
1686
1687         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, arg_str, dtype);
1688 }
1689
1690 DEFPY (show_ipv6_prefix_list_prefix,
1691        show_ipv6_prefix_list_prefix_cmd,
1692        "show ipv6 prefix-list WORD X:X::X:X/M$prefix [longer$dl|first-match$dfm]",
1693        SHOW_STR
1694        IPV6_STR
1695        PREFIX_LIST_STR
1696        "Name of a prefix list\n"
1697        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1698        "Lookup longer prefix\n"
1699        "First matched prefix\n")
1700 {
1701         enum display_type dtype = normal_display;
1702         if (dl)
1703                 dtype = longer_display;
1704         else if (dfm)
1705                 dtype = first_match_display;
1706
1707         return vty_show_prefix_list_prefix(vty, AFI_IP6, prefix_list,
1708                                            prefix_str, dtype);
1709 }
1710
1711 DEFPY (show_ipv6_prefix_list_summary,
1712        show_ipv6_prefix_list_summary_cmd,
1713        "show ipv6 prefix-list summary [WORD$prefix-list]",
1714        SHOW_STR
1715        IPV6_STR
1716        PREFIX_LIST_STR
1717        "Summary of prefix lists\n"
1718        "Name of a prefix list\n")
1719 {
1720         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, NULL,
1721                                     summary_display);
1722 }
1723
1724 DEFPY (show_ipv6_prefix_list_detail,
1725        show_ipv6_prefix_list_detail_cmd,
1726        "show ipv6 prefix-list detail [WORD$prefix-list]",
1727        SHOW_STR
1728        IPV6_STR
1729        PREFIX_LIST_STR
1730        "Detail of prefix lists\n"
1731        "Name of a prefix list\n")
1732 {
1733         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, NULL,
1734                                     detail_display);
1735 }
1736
1737 DEFPY (clear_ipv6_prefix_list,
1738        clear_ipv6_prefix_list_cmd,
1739        "clear ipv6 prefix-list [WORD [X:X::X:X/M$prefix]]",
1740        CLEAR_STR
1741        IPV6_STR
1742        PREFIX_LIST_STR
1743        "Name of a prefix list\n"
1744        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n")
1745 {
1746         return vty_clear_prefix_list(vty, AFI_IP6, prefix_list, prefix_str);
1747 }
1748
1749 /* Configuration write function. */
1750 static int config_write_prefix_afi(afi_t afi, struct vty *vty)
1751 {
1752         struct prefix_list *plist;
1753         struct prefix_list_entry *pentry;
1754         struct prefix_master *master;
1755         int write = 0;
1756
1757         master = prefix_master_get(afi, 0);
1758         if (master == NULL)
1759                 return 0;
1760
1761         if (!master->seqnum) {
1762                 vty_out(vty, "no ip%s prefix-list sequence-number\n",
1763                         afi == AFI_IP ? "" : "v6");
1764                 vty_out(vty, "!\n");
1765         }
1766
1767         for (plist = master->num.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 %" PRId64 " ", 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.val, 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                 /* vty_out (vty, "!\n"); */
1804         }
1805
1806         for (plist = master->str.head; plist; plist = plist->next) {
1807                 if (plist->desc) {
1808                         vty_out(vty, "ip%s prefix-list %s description %s\n",
1809                                 afi == AFI_IP ? "" : "v6", plist->name,
1810                                 plist->desc);
1811                         write++;
1812                 }
1813
1814                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1815                         vty_out(vty, "ip%s prefix-list %s ",
1816                                 afi == AFI_IP ? "" : "v6", plist->name);
1817
1818                         if (master->seqnum)
1819                                 vty_out(vty, "seq %" PRId64 " ", pentry->seq);
1820
1821                         vty_out(vty, "%s", prefix_list_type_str(pentry));
1822
1823                         if (pentry->any)
1824                                 vty_out(vty, " any");
1825                         else {
1826                                 struct prefix *p = &pentry->prefix;
1827                                 char buf[BUFSIZ];
1828
1829                                 vty_out(vty, " %s/%d",
1830                                         inet_ntop(p->family, p->u.val, buf,
1831                                                   BUFSIZ),
1832                                         p->prefixlen);
1833
1834                                 if (pentry->ge)
1835                                         vty_out(vty, " ge %d", pentry->ge);
1836                                 if (pentry->le)
1837                                         vty_out(vty, " le %d", pentry->le);
1838                         }
1839                         vty_out(vty, "\n");
1840                         write++;
1841                 }
1842         }
1843
1844         return write;
1845 }
1846
1847 struct stream *prefix_bgp_orf_entry(struct stream *s, struct prefix_list *plist,
1848                                     uint8_t init_flag, uint8_t permit_flag,
1849                                     uint8_t deny_flag)
1850 {
1851         struct prefix_list_entry *pentry;
1852
1853         if (!plist)
1854                 return s;
1855
1856         for (pentry = plist->head; pentry; pentry = pentry->next) {
1857                 uint8_t flag = init_flag;
1858                 struct prefix *p = &pentry->prefix;
1859
1860                 flag |= (pentry->type == PREFIX_PERMIT ? permit_flag
1861                                                        : deny_flag);
1862                 stream_putc(s, flag);
1863                 stream_putl(s, (uint32_t)pentry->seq);
1864                 stream_putc(s, (uint8_t)pentry->ge);
1865                 stream_putc(s, (uint8_t)pentry->le);
1866                 stream_put_prefix(s, p);
1867         }
1868
1869         return s;
1870 }
1871
1872 int prefix_bgp_orf_set(char *name, afi_t afi, struct orf_prefix *orfp,
1873                        int permit, int set)
1874 {
1875         struct prefix_list *plist;
1876         struct prefix_list_entry *pentry;
1877
1878         /* ge and le value check */
1879         if (orfp->ge && orfp->ge <= orfp->p.prefixlen)
1880                 return CMD_WARNING_CONFIG_FAILED;
1881         if (orfp->le && orfp->le <= orfp->p.prefixlen)
1882                 return CMD_WARNING_CONFIG_FAILED;
1883         if (orfp->le && orfp->ge > orfp->le)
1884                 return CMD_WARNING_CONFIG_FAILED;
1885
1886         if (orfp->ge && orfp->le == (afi == AFI_IP ? 32 : 128))
1887                 orfp->le = 0;
1888
1889         plist = prefix_list_get(afi, 1, name);
1890         if (!plist)
1891                 return CMD_WARNING_CONFIG_FAILED;
1892
1893         if (set) {
1894                 pentry = prefix_list_entry_make(
1895                         &orfp->p, (permit ? PREFIX_PERMIT : PREFIX_DENY),
1896                         orfp->seq, orfp->le, orfp->ge, 0);
1897
1898                 if (prefix_entry_dup_check(plist, pentry)) {
1899                         prefix_list_entry_free(pentry);
1900                         return CMD_WARNING_CONFIG_FAILED;
1901                 }
1902
1903                 prefix_list_entry_add(plist, pentry);
1904         } else {
1905                 pentry = prefix_list_entry_lookup(
1906                         plist, &orfp->p, (permit ? PREFIX_PERMIT : PREFIX_DENY),
1907                         orfp->seq, orfp->le, orfp->ge);
1908
1909                 if (!pentry)
1910                         return CMD_WARNING_CONFIG_FAILED;
1911
1912                 prefix_list_entry_delete(plist, pentry, 1);
1913         }
1914
1915         return CMD_SUCCESS;
1916 }
1917
1918 void prefix_bgp_orf_remove_all(afi_t afi, char *name)
1919 {
1920         struct prefix_list *plist;
1921
1922         plist = prefix_bgp_orf_lookup(afi, name);
1923         if (plist)
1924                 prefix_list_delete(plist);
1925 }
1926
1927 /* return prefix count */
1928 int prefix_bgp_show_prefix_list(struct vty *vty, afi_t afi, char *name,
1929                                 bool use_json)
1930 {
1931         struct prefix_list *plist;
1932         struct prefix_list_entry *pentry;
1933         json_object *json = NULL;
1934         json_object *json_prefix = NULL;
1935         json_object *json_list = NULL;
1936
1937         plist = prefix_bgp_orf_lookup(afi, name);
1938         if (!plist)
1939                 return 0;
1940
1941         if (!vty)
1942                 return plist->count;
1943
1944         if (use_json) {
1945                 json = json_object_new_object();
1946                 json_prefix = json_object_new_object();
1947                 json_list = json_object_new_object();
1948
1949                 json_object_int_add(json_prefix, "prefixListCounter",
1950                                     plist->count);
1951                 json_object_string_add(json_prefix, "prefixListName",
1952                                        plist->name);
1953
1954                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1955                         struct prefix *p = &pentry->prefix;
1956                         char buf_a[BUFSIZ];
1957                         char buf_b[BUFSIZ];
1958
1959                         sprintf(buf_a, "%s/%d",
1960                                 inet_ntop(p->family, p->u.val, buf_b,
1961                                           BUFSIZ),
1962                                 p->prefixlen);
1963
1964                         json_object_int_add(json_list, "seq", pentry->seq);
1965                         json_object_string_add(json_list, "seqPrefixListType",
1966                                                prefix_list_type_str(pentry));
1967
1968                         if (pentry->ge)
1969                                 json_object_int_add(json_list, "ge",
1970                                                     pentry->ge);
1971                         if (pentry->le)
1972                                 json_object_int_add(json_list, "le",
1973                                                     pentry->le);
1974
1975                         json_object_object_add(json_prefix, buf_a, json_list);
1976                 }
1977                 if (afi == AFI_IP)
1978                         json_object_object_add(json, "ipPrefixList",
1979                                                json_prefix);
1980                 else
1981                         json_object_object_add(json, "ipv6PrefixList",
1982                                                json_prefix);
1983
1984                 vty_out(vty, "%s\n", json_object_to_json_string_ext(
1985                                              json, JSON_C_TO_STRING_PRETTY));
1986                 json_object_free(json);
1987         } else {
1988                 vty_out(vty, "ip%s prefix-list %s: %d entries\n",
1989                         afi == AFI_IP ? "" : "v6", plist->name, plist->count);
1990
1991                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1992                         struct prefix *p = &pentry->prefix;
1993                         char buf[BUFSIZ];
1994
1995                         vty_out(vty, "   seq %" PRId64 " %s %s/%d",
1996                                 pentry->seq,
1997                                 prefix_list_type_str(pentry),
1998                                 inet_ntop(p->family, p->u.val, buf, BUFSIZ),
1999                                 p->prefixlen);
2000
2001                         if (pentry->ge)
2002                                 vty_out(vty, " ge %d", pentry->ge);
2003                         if (pentry->le)
2004                                 vty_out(vty, " le %d", pentry->le);
2005
2006                         vty_out(vty, "\n");
2007                 }
2008         }
2009         return plist->count;
2010 }
2011
2012 static void prefix_list_reset_afi(afi_t afi, int orf)
2013 {
2014         struct prefix_list *plist;
2015         struct prefix_list *next;
2016         struct prefix_master *master;
2017
2018         master = prefix_master_get(afi, orf);
2019         if (master == NULL)
2020                 return;
2021
2022         for (plist = master->num.head; plist; plist = next) {
2023                 next = plist->next;
2024                 prefix_list_delete(plist);
2025         }
2026         for (plist = master->str.head; plist; plist = next) {
2027                 next = plist->next;
2028                 prefix_list_delete(plist);
2029         }
2030
2031         assert(master->num.head == NULL);
2032         assert(master->num.tail == NULL);
2033
2034         assert(master->str.head == NULL);
2035         assert(master->str.tail == NULL);
2036
2037         master->seqnum = 1;
2038         master->recent = NULL;
2039 }
2040
2041
2042 /* Prefix-list node. */
2043 static struct cmd_node prefix_node = {PREFIX_NODE,
2044                                       "", /* Prefix list has no interface. */
2045                                       1};
2046
2047 static int config_write_prefix_ipv4(struct vty *vty)
2048 {
2049         return config_write_prefix_afi(AFI_IP, vty);
2050 }
2051
2052 static void plist_autocomplete_afi(afi_t afi, vector comps,
2053                                    struct cmd_token *token)
2054 {
2055         struct prefix_list *plist;
2056         struct prefix_master *master;
2057
2058         master = prefix_master_get(afi, 0);
2059         if (master == NULL)
2060                 return;
2061
2062         for (plist = master->str.head; plist; plist = plist->next)
2063                 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, plist->name));
2064         for (plist = master->num.head; plist; plist = plist->next)
2065                 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, plist->name));
2066 }
2067
2068 static void plist_autocomplete(vector comps, struct cmd_token *token)
2069 {
2070         plist_autocomplete_afi(AFI_IP, comps, token);
2071         plist_autocomplete_afi(AFI_IP6, comps, token);
2072 }
2073
2074 static const struct cmd_variable_handler plist_var_handlers[] = {
2075         {/* "prefix-list WORD" */
2076          .varname = "prefix_list",
2077          .completions = plist_autocomplete},
2078         {.completions = NULL}};
2079
2080
2081 static void prefix_list_init_ipv4(void)
2082 {
2083         install_node(&prefix_node, config_write_prefix_ipv4);
2084
2085         install_element(CONFIG_NODE, &ip_prefix_list_cmd);
2086         install_element(CONFIG_NODE, &no_ip_prefix_list_cmd);
2087         install_element(CONFIG_NODE, &no_ip_prefix_list_seq_cmd);
2088         install_element(CONFIG_NODE, &no_ip_prefix_list_all_cmd);
2089
2090         install_element(CONFIG_NODE, &ip_prefix_list_description_cmd);
2091         install_element(CONFIG_NODE, &no_ip_prefix_list_description_cmd);
2092         install_element(CONFIG_NODE,
2093                         &no_ip_prefix_list_description_comment_cmd);
2094
2095         install_element(CONFIG_NODE, &ip_prefix_list_sequence_number_cmd);
2096
2097         install_element(VIEW_NODE, &show_ip_prefix_list_cmd);
2098         install_element(VIEW_NODE, &show_ip_prefix_list_prefix_cmd);
2099         install_element(VIEW_NODE, &show_ip_prefix_list_summary_cmd);
2100         install_element(VIEW_NODE, &show_ip_prefix_list_detail_cmd);
2101
2102         install_element(ENABLE_NODE, &clear_ip_prefix_list_cmd);
2103 }
2104
2105 /* Prefix-list node. */
2106 static struct cmd_node prefix_ipv6_node = {
2107         PREFIX_IPV6_NODE, "", /* Prefix list has no interface. */
2108         1};
2109
2110 static int config_write_prefix_ipv6(struct vty *vty)
2111 {
2112         return config_write_prefix_afi(AFI_IP6, vty);
2113 }
2114
2115 static void prefix_list_init_ipv6(void)
2116 {
2117         install_node(&prefix_ipv6_node, config_write_prefix_ipv6);
2118
2119         install_element(CONFIG_NODE, &ipv6_prefix_list_cmd);
2120         install_element(CONFIG_NODE, &no_ipv6_prefix_list_cmd);
2121         install_element(CONFIG_NODE, &no_ipv6_prefix_list_all_cmd);
2122
2123         install_element(CONFIG_NODE, &ipv6_prefix_list_description_cmd);
2124         install_element(CONFIG_NODE, &no_ipv6_prefix_list_description_cmd);
2125         install_element(CONFIG_NODE,
2126                         &no_ipv6_prefix_list_description_comment_cmd);
2127
2128         install_element(CONFIG_NODE, &ipv6_prefix_list_sequence_number_cmd);
2129
2130         install_element(VIEW_NODE, &show_ipv6_prefix_list_cmd);
2131         install_element(VIEW_NODE, &show_ipv6_prefix_list_prefix_cmd);
2132         install_element(VIEW_NODE, &show_ipv6_prefix_list_summary_cmd);
2133         install_element(VIEW_NODE, &show_ipv6_prefix_list_detail_cmd);
2134
2135         install_element(ENABLE_NODE, &clear_ipv6_prefix_list_cmd);
2136 }
2137
2138 void prefix_list_init(void)
2139 {
2140         cmd_variable_handler_register(plist_var_handlers);
2141
2142         prefix_list_init_ipv4();
2143         prefix_list_init_ipv6();
2144 }
2145
2146 void prefix_list_reset(void)
2147 {
2148         prefix_list_reset_afi(AFI_IP, 0);
2149         prefix_list_reset_afi(AFI_IP6, 0);
2150         prefix_list_reset_afi(AFI_IP, 1);
2151         prefix_list_reset_afi(AFI_IP6, 1);
2152 }