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 /* Lookup prefix_list from list of prefix_list by name. */
 126 static struct prefix_list *prefix_list_lookup_do(afi_t afi, int orf,
 127                                                  const char *name)
 128 {
 129         struct prefix_list *plist;
 130         struct prefix_master *master;
 131
 132         if (name == NULL)
 133                 return NULL;
 134
 135         master = prefix_master_get(afi, orf);
 136         if (master == NULL)
 137                 return NULL;
 138
 139         for (plist = master->num.head; plist; plist = plist->next)
 140                 if (strcmp(plist->name, name) == 0)
 141                         return plist;
 142
 143         for (plist = master->str.head; plist; plist = plist->next)
 144                 if (strcmp(plist->name, name) == 0)
 145                         return plist;
 146
 147         return NULL;
 148 }
 149
 150 struct prefix_list *prefix_list_lookup(afi_t afi, const char *name)
 151 {
 152         return prefix_list_lookup_do(afi, 0, name);
 153 }
 154
 155 struct prefix_list *prefix_bgp_orf_lookup(afi_t afi, const char *name)
 156 {
 157         return prefix_list_lookup_do(afi, 1, name);
 158 }
 159
 160 static struct prefix_list *prefix_list_new(void)
 161 {
 162         struct prefix_list *new;
 163
 164         new = XCALLOC(MTYPE_PREFIX_LIST, sizeof(struct prefix_list));
 165         return new;
 166 }
 167
 168 static void prefix_list_free(struct prefix_list *plist)
 169 {
 170         XFREE(MTYPE_PREFIX_LIST, plist);
 171 }
 172
 173 static struct prefix_list_entry *prefix_list_entry_new(void)
 174 {
 175         struct prefix_list_entry *new;
 176
 177         new = XCALLOC(MTYPE_PREFIX_LIST_ENTRY,
 178                       sizeof(struct prefix_list_entry));
 179         return new;
 180 }
 181
 182 static void prefix_list_entry_free(struct prefix_list_entry *pentry)
 183 {
 184         XFREE(MTYPE_PREFIX_LIST_ENTRY, pentry);
 185 }
 186
 187 /* Insert new prefix list to list of prefix_list.  Each prefix_list
 188    is sorted by the name. */
 189 static struct prefix_list *prefix_list_insert(afi_t afi, int orf,
 190                                               const char *name)
 191 {
 192         unsigned int i;
 193         long number;
 194         struct prefix_list *plist;
 195         struct prefix_list *point;
 196         struct prefix_list_list *list;
 197         struct prefix_master *master;
 198
 199         master = prefix_master_get(afi, orf);
 200         if (master == NULL)
 201                 return NULL;
 202
 203         /* Allocate new prefix_list and copy given name. */
 204         plist = prefix_list_new();
 205         plist->name = XSTRDUP(MTYPE_MPREFIX_LIST_STR, name);
 206         plist->master = master;
 207         plist->trie =
 208                 XCALLOC(MTYPE_PREFIX_LIST_TRIE, sizeof(struct pltrie_table));
 209
 210         /* If name is made by all digit character.  We treat it as
 211            number. */
 212         for (number = 0, i = 0; i < strlen(name); i++) {
 213                 if (isdigit((int)name[i]))
 214                         number = (number * 10) + (name[i] - '0');
 215                 else
 216                         break;
 217         }
 218
 219         /* In case of name is all digit character */
 220         if (i == strlen(name)) {
 221                 plist->type = PREFIX_TYPE_NUMBER;
 222
 223                 /* Set prefix_list to number list. */
 224                 list = &master->num;
 225
 226                 for (point = list->head; point; point = point->next)
 227                         if (atol(point->name) >= number)
 228                                 break;
 229         } else {
 230                 plist->type = PREFIX_TYPE_STRING;
 231
 232                 /* Set prefix_list to string list. */
 233                 list = &master->str;
 234
 235                 /* Set point to insertion point. */
 236                 for (point = list->head; point; point = point->next)
 237                         if (strcmp(point->name, name) >= 0)
 238                                 break;
 239         }
 240
 241         /* In case of this is the first element of master. */
 242         if (list->head == NULL) {
 243                 list->head = list->tail = plist;
 244                 return plist;
 245         }
 246
 247         /* In case of insertion is made at the tail of access_list. */
 248         if (point == NULL) {
 249                 plist->prev = list->tail;
 250                 list->tail->next = plist;
 251                 list->tail = plist;
 252                 return plist;
 253         }
 254
 255         /* In case of insertion is made at the head of access_list. */
 256         if (point == list->head) {
 257                 plist->next = list->head;
 258                 list->head->prev = plist;
 259                 list->head = plist;
 260                 return plist;
 261         }
 262
 263         /* Insertion is made at middle of the access_list. */
 264         plist->next = point;
 265         plist->prev = point->prev;
 266
 267         if (point->prev)
 268                 point->prev->next = plist;
 269         point->prev = plist;
 270
 271         return plist;
 272 }
 273
 274 static struct prefix_list *prefix_list_get(afi_t afi, int orf, const char *name)
 275 {
 276         struct prefix_list *plist;
 277
 278         plist = prefix_list_lookup_do(afi, orf, name);
 279
 280         if (plist == NULL)
 281                 plist = prefix_list_insert(afi, orf, name);
 282         return plist;
 283 }
 284
 285 static void prefix_list_trie_del(struct prefix_list *plist,
 286                                  struct prefix_list_entry *pentry);
 287
 288 /* Delete prefix-list from prefix_list_master and free it. */
 289 static void prefix_list_delete(struct prefix_list *plist)
 290 {
 291         struct prefix_list_list *list;
 292         struct prefix_master *master;
 293         struct prefix_list_entry *pentry;
 294         struct prefix_list_entry *next;
 295
 296         /* If prefix-list contain prefix_list_entry free all of it. */
 297         for (pentry = plist->head; pentry; pentry = next) {
 298                 next = pentry->next;
 299                 prefix_list_trie_del(plist, pentry);
 300                 prefix_list_entry_free(pentry);
 301                 plist->count--;
 302         }
 303
 304         master = plist->master;
 305
 306         if (plist->type == PREFIX_TYPE_NUMBER)
 307                 list = &master->num;
 308         else
 309                 list = &master->str;
 310
 311         if (plist->next)
 312                 plist->next->prev = plist->prev;
 313         else
 314                 list->tail = plist->prev;
 315
 316         if (plist->prev)
 317                 plist->prev->next = plist->next;
 318         else
 319                 list->head = plist->next;
 320
 321         if (plist->desc)
 322                 XFREE(MTYPE_TMP, plist->desc);
 323
 324         /* Make sure master's recent changed prefix-list information is
 325            cleared. */
 326         master->recent = NULL;
 327
 328         route_map_notify_dependencies(plist->name, RMAP_EVENT_PLIST_DELETED);
 329
 330         if (master->delete_hook)
 331                 (*master->delete_hook)(plist);
 332
 333         if (plist->name)
 334                 XFREE(MTYPE_MPREFIX_LIST_STR, plist->name);
 335
 336         XFREE(MTYPE_PREFIX_LIST_TRIE, plist->trie);
 337
 338         prefix_list_free(plist);
 339 }
 340
 341 static struct prefix_list_entry *
 342 prefix_list_entry_make(struct prefix *prefix, enum prefix_list_type type,
 343                        int seq, int le, int ge, int any)
 344 {
 345         struct prefix_list_entry *pentry;
 346
 347         pentry = prefix_list_entry_new();
 348
 349         if (any)
 350                 pentry->any = 1;
 351
 352         prefix_copy(&pentry->prefix, prefix);
 353         pentry->type = type;
 354         pentry->seq = seq;
 355         pentry->le = le;
 356         pentry->ge = ge;
 357
 358         return pentry;
 359 }
 360
 361 /* Add hook function. */
 362 void prefix_list_add_hook(void (*func)(struct prefix_list *plist))
 363 {
 364         prefix_master_ipv4.add_hook = func;
 365         prefix_master_ipv6.add_hook = func;
 366 }
 367
 368 /* Delete hook function. */
 369 void prefix_list_delete_hook(void (*func)(struct prefix_list *plist))
 370 {
 371         prefix_master_ipv4.delete_hook = func;
 372         prefix_master_ipv6.delete_hook = func;
 373 }
 374
 375 /* Calculate new sequential number. */
 376 static int prefix_new_seq_get(struct prefix_list *plist)
 377 {
 378         int maxseq;
 379         int newseq;
 380         struct prefix_list_entry *pentry;
 381
 382         maxseq = newseq = 0;
 383
 384         for (pentry = plist->head; pentry; pentry = pentry->next) {
 385                 if (maxseq < pentry->seq)
 386                         maxseq = pentry->seq;
 387         }
 388
 389         newseq = ((maxseq / 5) * 5) + 5;
 390
 391         return newseq;
 392 }
 393
 394 /* Return prefix list entry which has same seq number. */
 395 static struct prefix_list_entry *prefix_seq_check(struct prefix_list *plist,
 396                                                   int seq)
 397 {
 398         struct prefix_list_entry *pentry;
 399
 400         for (pentry = plist->head; pentry; pentry = pentry->next)
 401                 if (pentry->seq == seq)
 402                         return pentry;
 403         return NULL;
 404 }
 405
 406 static struct prefix_list_entry *
 407 prefix_list_entry_lookup(struct prefix_list *plist, struct prefix *prefix,
 408                          enum prefix_list_type type, int seq, int le, int ge)
 409 {
 410         struct prefix_list_entry *pentry;
 411
 412         for (pentry = plist->head; pentry; pentry = pentry->next)
 413                 if (prefix_same(&pentry->prefix, prefix)
 414                     && pentry->type == type) {
 415                         if (seq >= 0 && pentry->seq != seq)
 416                                 continue;
 417
 418                         if (pentry->le != le)
 419                                 continue;
 420                         if (pentry->ge != ge)
 421                                 continue;
 422
 423                         return pentry;
 424                 }
 425
 426         return NULL;
 427 }
 428
 429 static void trie_walk_affected(size_t validbits, struct pltrie_table *table,
 430                                uint8_t byte, struct prefix_list_entry *object,
 431                                void (*fn)(struct prefix_list_entry *object,
 432                                           struct prefix_list_entry **updptr))
 433 {
 434         uint8_t mask;
 435         uint16_t bwalk;
 436
 437         if (validbits > PLC_BITS) {
 438                 fn(object, &table->entries[byte].final_chain);
 439                 return;
 440         }
 441
 442         mask = (1 << (8 - validbits)) - 1;
 443         for (bwalk = byte & ~mask; bwalk <= byte + mask; bwalk++) {
 444                 fn(object, &table->entries[bwalk].up_chain);
 445         }
 446 }
 447
 448 static void trie_uninstall_fn(struct prefix_list_entry *object,
 449                               struct prefix_list_entry **updptr)
 450 {
 451         for (; *updptr; updptr = &(*updptr)->next_best)
 452                 if (*updptr == object) {
 453                         *updptr = object->next_best;
 454                         break;
 455                 }
 456 }
 457
 458 static int trie_table_empty(struct pltrie_table *table)
 459 {
 460         size_t i;
 461         for (i = 0; i < PLC_LEN; i++)
 462                 if (table->entries[i].next_table || table->entries[i].up_chain)
 463                         return 0;
 464         return 1;
 465 }
 466
 467 static void prefix_list_trie_del(struct prefix_list *plist,
 468                                  struct prefix_list_entry *pentry)
 469 {
 470         size_t depth, maxdepth = plist->master->trie_depth;
 471         uint8_t *bytes = &pentry->prefix.u.prefix;
 472         size_t validbits = pentry->prefix.prefixlen;
 473         struct pltrie_table *table, **tables[PLC_MAXLEVEL];
 474
 475         table = plist->trie;
 476         for (depth = 0; validbits > PLC_BITS && depth < maxdepth - 1; depth++) {
 477                 uint8_t byte = bytes[depth];
 478                 assert(table->entries[byte].next_table);
 479
 480                 tables[depth + 1] = &table->entries[byte].next_table;
 481                 table = table->entries[byte].next_table;
 482
 483                 validbits -= PLC_BITS;
 484         }
 485
 486         trie_walk_affected(validbits, table, bytes[depth], pentry,
 487                            trie_uninstall_fn);
 488
 489         for (; depth > 0; depth--)
 490                 if (trie_table_empty(*tables[depth])) {
 491                         XFREE(MTYPE_PREFIX_LIST_TRIE, *tables[depth]);
 492                         *tables[depth] = NULL;
 493                 }
 494 }
 495
 496
 497 static void prefix_list_entry_delete(struct prefix_list *plist,
 498                                      struct prefix_list_entry *pentry,
 499                                      int update_list)
 500 {
 501         if (plist == NULL || pentry == NULL)
 502                 return;
 503
 504         prefix_list_trie_del(plist, pentry);
 505
 506         if (pentry->prev)
 507                 pentry->prev->next = pentry->next;
 508         else
 509                 plist->head = pentry->next;
 510         if (pentry->next)
 511                 pentry->next->prev = pentry->prev;
 512         else
 513                 plist->tail = pentry->prev;
 514
 515         prefix_list_entry_free(pentry);
 516
 517         plist->count--;
 518
 519         if (update_list) {
 520                 route_map_notify_dependencies(plist->name,
 521                                               RMAP_EVENT_PLIST_DELETED);
 522                 if (plist->master->delete_hook)
 523                         (*plist->master->delete_hook)(plist);
 524
 525                 if (plist->head == NULL && plist->tail == NULL
 526                     && plist->desc == NULL)
 527                         prefix_list_delete(plist);
 528                 else
 529                         plist->master->recent = plist;
 530         }
 531 }
 532
 533 static void trie_install_fn(struct prefix_list_entry *object,
 534                             struct prefix_list_entry **updptr)
 535 {
 536         while (*updptr) {
 537                 if (*updptr == object)
 538                         return;
 539                 if ((*updptr)->prefix.prefixlen < object->prefix.prefixlen)
 540                         break;
 541                 if ((*updptr)->seq > object->seq)
 542                         break;
 543                 updptr = &(*updptr)->next_best;
 544         }
 545
 546         if (!object->next_best)
 547                 object->next_best = *updptr;
 548         else
 549                 assert(object->next_best == *updptr || !*updptr);
 550
 551         *updptr = object;
 552 }
 553
 554 static void prefix_list_trie_add(struct prefix_list *plist,
 555                                  struct prefix_list_entry *pentry)
 556 {
 557         size_t depth = plist->master->trie_depth;
 558         uint8_t *bytes = &pentry->prefix.u.prefix;
 559         size_t validbits = pentry->prefix.prefixlen;
 560         struct pltrie_table *table;
 561
 562         table = plist->trie;
 563         while (validbits > PLC_BITS && depth > 1) {
 564                 if (!table->entries[*bytes].next_table)
 565                         table->entries[*bytes].next_table =
 566                                 XCALLOC(MTYPE_PREFIX_LIST_TRIE,
 567                                         sizeof(struct pltrie_table));
 568                 table = table->entries[*bytes].next_table;
 569                 bytes++;
 570                 depth--;
 571                 validbits -= PLC_BITS;
 572         }
 573
 574         trie_walk_affected(validbits, table, *bytes, pentry, trie_install_fn);
 575 }
 576
 577 static void prefix_list_entry_add(struct prefix_list *plist,
 578                                   struct prefix_list_entry *pentry)
 579 {
 580         struct prefix_list_entry *replace;
 581         struct prefix_list_entry *point;
 582
 583         /* Automatic asignment of seq no. */
 584         if (pentry->seq == -1)
 585                 pentry->seq = prefix_new_seq_get(plist);
 586
 587         if (plist->tail && pentry->seq > plist->tail->seq)
 588                 point = NULL;
 589         else {
 590                 /* Is there any same seq prefix list entry? */
 591                 replace = prefix_seq_check(plist, pentry->seq);
 592                 if (replace)
 593                         prefix_list_entry_delete(plist, replace, 0);
 594
 595                 /* Check insert point. */
 596                 for (point = plist->head; point; point = point->next)
 597                         if (point->seq >= pentry->seq)
 598                                 break;
 599         }
 600
 601         /* In case of this is the first element of the list. */
 602         pentry->next = point;
 603
 604         if (point) {
 605                 if (point->prev)
 606                         point->prev->next = pentry;
 607                 else
 608                         plist->head = pentry;
 609
 610                 pentry->prev = point->prev;
 611                 point->prev = pentry;
 612         } else {
 613                 if (plist->tail)
 614                         plist->tail->next = pentry;
 615                 else
 616                         plist->head = pentry;
 617
 618                 pentry->prev = plist->tail;
 619                 plist->tail = pentry;
 620         }
 621
 622         prefix_list_trie_add(plist, pentry);
 623
 624         /* Increment count. */
 625         plist->count++;
 626
 627         /* Run hook function. */
 628         if (plist->master->add_hook)
 629                 (*plist->master->add_hook)(plist);
 630
 631         route_map_notify_dependencies(plist->name, RMAP_EVENT_PLIST_ADDED);
 632         plist->master->recent = plist;
 633 }
 634
 635 /* Return string of prefix_list_type. */
 636 static const char *prefix_list_type_str(struct prefix_list_entry *pentry)
 637 {
 638         switch (pentry->type) {
 639         case PREFIX_PERMIT:
 640                 return "permit";
 641         case PREFIX_DENY:
 642                 return "deny";
 643         default:
 644                 return "";
 645         }
 646 }
 647
 648 static int prefix_list_entry_match(struct prefix_list_entry *pentry,
 649                                    struct prefix *p)
 650 {
 651         int ret;
 652
 653         ret = prefix_match(&pentry->prefix, p);
 654         if (!ret)
 655                 return 0;
 656
 657         /* In case of le nor ge is specified, exact match is performed. */
 658         if (!pentry->le && !pentry->ge) {
 659                 if (pentry->prefix.prefixlen != p->prefixlen)
 660                         return 0;
 661         } else {
 662                 if (pentry->le)
 663                         if (p->prefixlen > pentry->le)
 664                                 return 0;
 665
 666                 if (pentry->ge)
 667                         if (p->prefixlen < pentry->ge)
 668                                 return 0;
 669         }
 670         return 1;
 671 }
 672
 673 enum prefix_list_type prefix_list_apply(struct prefix_list *plist, void *object)
 674 {
 675         struct prefix_list_entry *pentry, *pbest = NULL;
 676
 677         struct prefix *p = (struct prefix *)object;
 678         uint8_t *byte = &p->u.prefix;
 679         size_t depth;
 680         size_t validbits = p->prefixlen;
 681         struct pltrie_table *table;
 682
 683         if (plist == NULL)
 684                 return PREFIX_DENY;
 685
 686         if (plist->count == 0)
 687                 return PREFIX_PERMIT;
 688
 689         depth = plist->master->trie_depth;
 690         table = plist->trie;
 691         while (1) {
 692                 for (pentry = table->entries[*byte].up_chain; pentry;
 693                      pentry = pentry->next_best) {
 694                         if (pbest && pbest->seq < pentry->seq)
 695                                 continue;
 696                         if (prefix_list_entry_match(pentry, p))
 697                                 pbest = pentry;
 698                 }
 699
 700                 if (validbits <= PLC_BITS)
 701                         break;
 702                 validbits -= PLC_BITS;
 703
 704                 if (--depth) {
 705                         if (!table->entries[*byte].next_table)
 706                                 break;
 707
 708                         table = table->entries[*byte].next_table;
 709                         byte++;
 710                         continue;
 711                 }
 712
 713                 for (pentry = table->entries[*byte].final_chain; pentry;
 714                      pentry = pentry->next_best) {
 715                         if (pbest && pbest->seq < pentry->seq)
 716                                 continue;
 717                         if (prefix_list_entry_match(pentry, p))
 718                                 pbest = pentry;
 719                 }
 720                 break;
 721         }
 722
 723         if (pbest == NULL)
 724                 return PREFIX_DENY;
 725
 726         return pbest->type;
 727 }
 728
 729 static void __attribute__((unused)) prefix_list_print(struct prefix_list *plist)
 730 {
 731         struct prefix_list_entry *pentry;
 732
 733         if (plist == NULL)
 734                 return;
 735
 736         printf("ip prefix-list %s: %d entries\n", plist->name, plist->count);
 737
 738         for (pentry = plist->head; pentry; pentry = pentry->next) {
 739                 if (pentry->any)
 740                         printf("any %s\n", prefix_list_type_str(pentry));
 741                 else {
 742                         struct prefix *p;
 743                         char buf[BUFSIZ];
 744
 745                         p = &pentry->prefix;
 746
 747                         printf("  seq %u %s %s/%d", pentry->seq,
 748                                prefix_list_type_str(pentry),
 749                                inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ),
 750                                p->prefixlen);
 751                         if (pentry->ge)
 752                                 printf(" ge %d", pentry->ge);
 753                         if (pentry->le)
 754                                 printf(" le %d", pentry->le);
 755                         printf("\n");
 756                 }
 757         }
 758 }
 759
 760 /* Retrun 1 when plist already include pentry policy. */
 761 static struct prefix_list_entry *
 762 prefix_entry_dup_check(struct prefix_list *plist, struct prefix_list_entry *new)
 763 {
 764         size_t depth, maxdepth = plist->master->trie_depth;
 765         uint8_t byte, *bytes = &new->prefix.u.prefix;
 766         size_t validbits = new->prefix.prefixlen;
 767         struct pltrie_table *table;
 768         struct prefix_list_entry *pentry;
 769         int seq = 0;
 770
 771         if (new->seq == -1)
 772                 seq = prefix_new_seq_get(plist);
 773         else
 774                 seq = new->seq;
 775
 776         table = plist->trie;
 777         for (depth = 0; validbits > PLC_BITS && depth < maxdepth - 1; depth++) {
 778                 byte = bytes[depth];
 779                 if (!table->entries[byte].next_table)
 780                         return NULL;
 781
 782                 table = table->entries[byte].next_table;
 783                 validbits -= PLC_BITS;
 784         }
 785
 786         byte = bytes[depth];
 787         if (validbits > PLC_BITS)
 788                 pentry = table->entries[byte].final_chain;
 789         else
 790                 pentry = table->entries[byte].up_chain;
 791
 792         for (; pentry; pentry = pentry->next_best) {
 793                 if (prefix_same(&pentry->prefix, &new->prefix)
 794                     && pentry->type == new->type && pentry->le == new->le
 795                     && pentry->ge == new->ge && pentry->seq != seq)
 796                         return pentry;
 797         }
 798         return NULL;
 799 }
 800
 801 static int vty_invalid_prefix_range(struct vty *vty, const char *prefix)
 802 {
 803         vty_out(vty,
 804                 "%% Invalid prefix range for %s, make sure: len < ge-value <= le-value\n",
 805                 prefix);
 806         return CMD_WARNING_CONFIG_FAILED;
 807 }
 808
 809 static int vty_prefix_list_install(struct vty *vty, afi_t afi, const char *name,
 810                                    const char *seq, const char *typestr,
 811                                    const char *prefix, const char *ge,
 812                                    const char *le)
 813 {
 814         int ret;
 815         enum prefix_list_type type;
 816         struct prefix_list *plist;
 817         struct prefix_list_entry *pentry;
 818         struct prefix_list_entry *dup;
 819         struct prefix p, p_tmp;
 820         int any = 0;
 821         int seqnum = -1;
 822         int lenum = 0;
 823         int genum = 0;
 824
 825         /* Sequential number. */
 826         if (seq)
 827                 seqnum = atoi(seq);
 828
 829         /* ge and le number */
 830         if (ge)
 831                 genum = atoi(ge);
 832         if (le)
 833                 lenum = atoi(le);
 834
 835         /* Check filter type. */
 836         if (strncmp("permit", typestr, 1) == 0)
 837                 type = PREFIX_PERMIT;
 838         else if (strncmp("deny", typestr, 1) == 0)
 839                 type = PREFIX_DENY;
 840         else {
 841                 vty_out(vty, "%% prefix type must be permit or deny\n");
 842                 return CMD_WARNING_CONFIG_FAILED;
 843         }
 844
 845         /* "any" is special token for matching any IPv4 addresses.  */
 846         switch (afi) {
 847         case AFI_IP:
 848                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
 849                         ret = str2prefix_ipv4("0.0.0.0/0",
 850                                               (struct prefix_ipv4 *)&p);
 851                         genum = 0;
 852                         lenum = IPV4_MAX_BITLEN;
 853                         any = 1;
 854                 } else
 855                         ret = str2prefix_ipv4(prefix, (struct prefix_ipv4 *)&p);
 856
 857                 if (ret <= 0) {
 858                         vty_out(vty, "%% Malformed IPv4 prefix\n");
 859                         return CMD_WARNING_CONFIG_FAILED;
 860                 }
 861
 862                 /* make a copy to verify prefix matches mask length */
 863                 prefix_copy(&p_tmp, &p);
 864                 apply_mask_ipv4((struct prefix_ipv4 *)&p_tmp);
 865
 866                 break;
 867         case AFI_IP6:
 868                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
 869                         ret = str2prefix_ipv6("::/0", (struct prefix_ipv6 *)&p);
 870                         genum = 0;
 871                         lenum = IPV6_MAX_BITLEN;
 872                         any = 1;
 873                 } else
 874                         ret = str2prefix_ipv6(prefix, (struct prefix_ipv6 *)&p);
 875
 876                 if (ret <= 0) {
 877                         vty_out(vty, "%% Malformed IPv6 prefix\n");
 878                         return CMD_WARNING_CONFIG_FAILED;
 879                 }
 880
 881                 /* make a copy to verify prefix matches mask length */
 882                 prefix_copy(&p_tmp, &p);
 883                 apply_mask_ipv6((struct prefix_ipv6 *)&p_tmp);
 884
 885                 break;
 886         case AFI_L2VPN:
 887         default:
 888                 vty_out(vty, "%% Unrecognized AFI (%d)\n", afi);
 889                 return CMD_WARNING_CONFIG_FAILED;
 890                 break;
 891         }
 892
 893         /* If prefix has bits not under the mask, adjust it to fit */
 894         if (!prefix_same(&p_tmp, &p)) {
 895                 char buf[PREFIX2STR_BUFFER];
 896                 char buf_tmp[PREFIX2STR_BUFFER];
 897                 prefix2str(&p, buf, sizeof(buf));
 898                 prefix2str(&p_tmp, buf_tmp, sizeof(buf_tmp));
 899                 zlog_warn(
 900                         "Prefix-list %s prefix changed from %s to %s to match length",
 901                         name, buf, buf_tmp);
 902                 p = p_tmp;
 903         }
 904
 905         /* ge and le check. */
 906         if (genum && (genum <= p.prefixlen))
 907                 return vty_invalid_prefix_range(vty, prefix);
 908
 909         if (lenum && (lenum <= p.prefixlen))
 910                 return vty_invalid_prefix_range(vty, prefix);
 911
 912         if (lenum && (genum > lenum))
 913                 return vty_invalid_prefix_range(vty, prefix);
 914
 915         if (genum && (lenum == (afi == AFI_IP ? 32 : 128)))
 916                 lenum = 0;
 917
 918         /* Get prefix_list with name. */
 919         plist = prefix_list_get(afi, 0, name);
 920
 921         /* Make prefix entry. */
 922         pentry = prefix_list_entry_make(&p, type, seqnum, lenum, genum, any);
 923
 924         /* Check same policy. */
 925         dup = prefix_entry_dup_check(plist, pentry);
 926
 927         if (dup) {
 928                 prefix_list_entry_free(pentry);
 929                 return CMD_SUCCESS;
 930         }
 931
 932         /* Install new filter to the access_list. */
 933         prefix_list_entry_add(plist, pentry);
 934
 935         return CMD_SUCCESS;
 936 }
 937
 938 static int vty_prefix_list_uninstall(struct vty *vty, afi_t afi,
 939                                      const char *name, const char *seq,
 940                                      const char *typestr, const char *prefix,
 941                                      const char *ge, const char *le)
 942 {
 943         int ret;
 944         enum prefix_list_type type;
 945         struct prefix_list *plist;
 946         struct prefix_list_entry *pentry;
 947         struct prefix p;
 948         int seqnum = -1;
 949         int lenum = 0;
 950         int genum = 0;
 951
 952         /* Check prefix list name. */
 953         plist = prefix_list_lookup(afi, name);
 954         if (!plist) {
 955                 vty_out(vty, "%% Can't find specified prefix-list\n");
 956                 return CMD_WARNING_CONFIG_FAILED;
 957         }
 958
 959         /* Only prefix-list name specified, delete the entire prefix-list. */
 960         if (seq == NULL && typestr == NULL && prefix == NULL && ge == NULL
 961             && le == NULL) {
 962                 prefix_list_delete(plist);
 963                 return CMD_SUCCESS;
 964         }
 965
 966         /* We must have, at a minimum, both the type and prefix here */
 967         if ((typestr == NULL) || (prefix == NULL)) {
 968                 vty_out(vty, "%% Both prefix and type required\n");
 969                 return CMD_WARNING_CONFIG_FAILED;
 970         }
 971
 972         /* Check sequence number. */
 973         if (seq)
 974                 seqnum = atoi(seq);
 975
 976         /* ge and le number */
 977         if (ge)
 978                 genum = atoi(ge);
 979         if (le)
 980                 lenum = atoi(le);
 981
 982         /* Check of filter type. */
 983         if (strncmp("permit", typestr, 1) == 0)
 984                 type = PREFIX_PERMIT;
 985         else if (strncmp("deny", typestr, 1) == 0)
 986                 type = PREFIX_DENY;
 987         else {
 988                 vty_out(vty, "%% prefix type must be permit or deny\n");
 989                 return CMD_WARNING_CONFIG_FAILED;
 990         }
 991
 992         /* "any" is special token for matching any IPv4 addresses.  */
 993         if (afi == AFI_IP) {
 994                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
 995                         ret = str2prefix_ipv4("0.0.0.0/0",
 996                                               (struct prefix_ipv4 *)&p);
 997                         genum = 0;
 998                         lenum = IPV4_MAX_BITLEN;
 999                 } else
1000                         ret = str2prefix_ipv4(prefix, (struct prefix_ipv4 *)&p);
1001
1002                 if (ret <= 0) {
1003                         vty_out(vty, "%% Malformed IPv4 prefix\n");
1004                         return CMD_WARNING_CONFIG_FAILED;
1005                 }
1006         } else if (afi == AFI_IP6) {
1007                 if (strncmp("any", prefix, strlen(prefix)) == 0) {
1008                         ret = str2prefix_ipv6("::/0", (struct prefix_ipv6 *)&p);
1009                         genum = 0;
1010                         lenum = IPV6_MAX_BITLEN;
1011                 } else
1012                         ret = str2prefix_ipv6(prefix, (struct prefix_ipv6 *)&p);
1013
1014                 if (ret <= 0) {
1015                         vty_out(vty, "%% Malformed IPv6 prefix\n");
1016                         return CMD_WARNING_CONFIG_FAILED;
1017                 }
1018         }
1019
1020         /* Lookup prefix entry. */
1021         pentry =
1022                 prefix_list_entry_lookup(plist, &p, type, seqnum, lenum, genum);
1023
1024         if (pentry == NULL) {
1025                 vty_out(vty, "%% Can't find specified prefix-list\n");
1026                 return CMD_WARNING_CONFIG_FAILED;
1027         }
1028
1029         /* Install new filter to the access_list. */
1030         prefix_list_entry_delete(plist, pentry, 1);
1031
1032         return CMD_SUCCESS;
1033 }
1034
1035 static int vty_prefix_list_desc_unset(struct vty *vty, afi_t afi,
1036                                       const char *name)
1037 {
1038         struct prefix_list *plist;
1039
1040         plist = prefix_list_lookup(afi, name);
1041         if (!plist) {
1042                 vty_out(vty, "%% Can't find specified prefix-list\n");
1043                 return CMD_WARNING_CONFIG_FAILED;
1044         }
1045
1046         if (plist->desc) {
1047                 XFREE(MTYPE_TMP, plist->desc);
1048                 plist->desc = NULL;
1049         }
1050
1051         if (plist->head == NULL && plist->tail == NULL && plist->desc == NULL)
1052                 prefix_list_delete(plist);
1053
1054         return CMD_SUCCESS;
1055 }
1056
1057 enum display_type {
1058         normal_display,
1059         summary_display,
1060         detail_display,
1061         sequential_display,
1062         longer_display,
1063         first_match_display
1064 };
1065
1066 static void vty_show_prefix_entry(struct vty *vty, afi_t afi,
1067                                   struct prefix_list *plist,
1068                                   struct prefix_master *master,
1069                                   enum display_type dtype, int seqnum)
1070 {
1071         struct prefix_list_entry *pentry;
1072
1073         /* Print the name of the protocol */
1074         vty_out(vty, "%s: ", frr_protoname);
1075
1076         if (dtype == normal_display) {
1077                 vty_out(vty, "ip%s prefix-list %s: %d entries\n",
1078                         afi == AFI_IP ? "" : "v6", plist->name, plist->count);
1079                 if (plist->desc)
1080                         vty_out(vty, "   Description: %s\n", plist->desc);
1081         } else if (dtype == summary_display || dtype == detail_display) {
1082                 vty_out(vty, "ip%s prefix-list %s:\n",
1083                         afi == AFI_IP ? "" : "v6", plist->name);
1084
1085                 if (plist->desc)
1086                         vty_out(vty, "   Description: %s\n", plist->desc);
1087
1088                 vty_out(vty,
1089                         "   count: %d, range entries: %d, sequences: %u - %u\n",
1090                         plist->count, plist->rangecount,
1091                         plist->head ? plist->head->seq : 0,
1092                         plist->tail ? plist->tail->seq : 0);
1093         }
1094
1095         if (dtype != summary_display) {
1096                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1097                         if (dtype == sequential_display
1098                             && pentry->seq != seqnum)
1099                                 continue;
1100
1101                         vty_out(vty, "   ");
1102
1103                         if (master->seqnum)
1104                                 vty_out(vty, "seq %u ", pentry->seq);
1105
1106                         vty_out(vty, "%s ", prefix_list_type_str(pentry));
1107
1108                         if (pentry->any)
1109                                 vty_out(vty, "any");
1110                         else {
1111                                 struct prefix *p = &pentry->prefix;
1112                                 char buf[BUFSIZ];
1113
1114                                 vty_out(vty, "%s/%d",
1115                                         inet_ntop(p->family, &p->u.prefix, buf,
1116                                                   BUFSIZ),
1117                                         p->prefixlen);
1118
1119                                 if (pentry->ge)
1120                                         vty_out(vty, " ge %d", pentry->ge);
1121                                 if (pentry->le)
1122                                         vty_out(vty, " le %d", pentry->le);
1123                         }
1124
1125                         if (dtype == detail_display
1126                             || dtype == sequential_display)
1127                                 vty_out(vty, " (hit count: %ld, refcount: %ld)",
1128                                         pentry->hitcnt, pentry->refcnt);
1129
1130                         vty_out(vty, "\n");
1131                 }
1132         }
1133 }
1134
1135 static int vty_show_prefix_list(struct vty *vty, afi_t afi, const char *name,
1136                                 const char *seq, enum display_type dtype)
1137 {
1138         struct prefix_list *plist;
1139         struct prefix_master *master;
1140         int seqnum = 0;
1141
1142         master = prefix_master_get(afi, 0);
1143         if (master == NULL)
1144                 return CMD_WARNING;
1145
1146         if (seq)
1147                 seqnum = atoi(seq);
1148
1149         if (name) {
1150                 plist = prefix_list_lookup(afi, name);
1151                 if (!plist) {
1152                         vty_out(vty, "%% Can't find specified prefix-list\n");
1153                         return CMD_WARNING;
1154                 }
1155                 vty_show_prefix_entry(vty, afi, plist, master, dtype, seqnum);
1156         } else {
1157                 if (dtype == detail_display || dtype == summary_display) {
1158                         if (master->recent)
1159                                 vty_out(vty,
1160                                         "Prefix-list with the last deletion/insertion: %s\n",
1161                                         master->recent->name);
1162                 }
1163
1164                 for (plist = master->num.head; plist; plist = plist->next)
1165                         vty_show_prefix_entry(vty, afi, plist, master, dtype,
1166                                               seqnum);
1167
1168                 for (plist = master->str.head; plist; plist = plist->next)
1169                         vty_show_prefix_entry(vty, afi, plist, master, dtype,
1170                                               seqnum);
1171         }
1172
1173         return CMD_SUCCESS;
1174 }
1175
1176 static int vty_show_prefix_list_prefix(struct vty *vty, afi_t afi,
1177                                        const char *name, const char *prefix,
1178                                        enum display_type type)
1179 {
1180         struct prefix_list *plist;
1181         struct prefix_list_entry *pentry;
1182         struct prefix p;
1183         int ret;
1184         int match;
1185
1186         plist = prefix_list_lookup(afi, name);
1187         if (!plist) {
1188                 vty_out(vty, "%% Can't find specified prefix-list\n");
1189                 return CMD_WARNING;
1190         }
1191
1192         ret = str2prefix(prefix, &p);
1193         if (ret <= 0) {
1194                 vty_out(vty, "%% prefix is malformed\n");
1195                 return CMD_WARNING;
1196         }
1197
1198         for (pentry = plist->head; pentry; pentry = pentry->next) {
1199                 match = 0;
1200
1201                 if (type == normal_display || type == first_match_display)
1202                         if (prefix_same(&p, &pentry->prefix))
1203                                 match = 1;
1204
1205                 if (type == longer_display)
1206                         if (prefix_match(&p, &pentry->prefix))
1207                                 match = 1;
1208
1209                 if (match) {
1210                         vty_out(vty, "   seq %u %s ", pentry->seq,
1211                                 prefix_list_type_str(pentry));
1212
1213                         if (pentry->any)
1214                                 vty_out(vty, "any");
1215                         else {
1216                                 struct prefix *p = &pentry->prefix;
1217                                 char buf[BUFSIZ];
1218
1219                                 vty_out(vty, "%s/%d",
1220                                         inet_ntop(p->family, &p->u.prefix, buf,
1221                                                   BUFSIZ),
1222                                         p->prefixlen);
1223
1224                                 if (pentry->ge)
1225                                         vty_out(vty, " ge %d", pentry->ge);
1226                                 if (pentry->le)
1227                                         vty_out(vty, " le %d", pentry->le);
1228                         }
1229
1230                         if (type == normal_display
1231                             || type == first_match_display)
1232                                 vty_out(vty, " (hit count: %ld, refcount: %ld)",
1233                                         pentry->hitcnt, pentry->refcnt);
1234
1235                         vty_out(vty, "\n");
1236
1237                         if (type == first_match_display)
1238                                 return CMD_SUCCESS;
1239                 }
1240         }
1241         return CMD_SUCCESS;
1242 }
1243
1244 static int vty_clear_prefix_list(struct vty *vty, afi_t afi, const char *name,
1245                                  const char *prefix)
1246 {
1247         struct prefix_master *master;
1248         struct prefix_list *plist;
1249         struct prefix_list_entry *pentry;
1250         int ret;
1251         struct prefix p;
1252
1253         master = prefix_master_get(afi, 0);
1254         if (master == NULL)
1255                 return CMD_WARNING;
1256
1257         if (name == NULL && prefix == NULL) {
1258                 for (plist = master->num.head; plist; plist = plist->next)
1259                         for (pentry = plist->head; pentry;
1260                              pentry = pentry->next)
1261                                 pentry->hitcnt = 0;
1262
1263                 for (plist = master->str.head; plist; plist = plist->next)
1264                         for (pentry = plist->head; pentry;
1265                              pentry = pentry->next)
1266                                 pentry->hitcnt = 0;
1267         } else {
1268                 plist = prefix_list_lookup(afi, name);
1269                 if (!plist) {
1270                         vty_out(vty, "%% Can't find specified prefix-list\n");
1271                         return CMD_WARNING;
1272                 }
1273
1274                 if (prefix) {
1275                         ret = str2prefix(prefix, &p);
1276                         if (ret <= 0) {
1277                                 vty_out(vty, "%% prefix is malformed\n");
1278                                 return CMD_WARNING;
1279                         }
1280                 }
1281
1282                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1283                         if (prefix) {
1284                                 if (prefix_match(&pentry->prefix, &p))
1285                                         pentry->hitcnt = 0;
1286                         } else
1287                                 pentry->hitcnt = 0;
1288                 }
1289         }
1290         return CMD_SUCCESS;
1291 }
1292
1293 #ifndef VTYSH_EXTRACT_PL
1294 #include "plist_clippy.c"
1295 #endif
1296
1297 DEFPY (ip_prefix_list,
1298        ip_prefix_list_cmd,
1299        "ip prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|A.B.C.D/M$dest [{ge (0-32)|le (0-32)}]>",
1300        IP_STR
1301        PREFIX_LIST_STR
1302        "Name of a prefix list\n"
1303        "sequence number of an entry\n"
1304        "Sequence number\n"
1305        "Specify packets to reject\n"
1306        "Specify packets to forward\n"
1307        "Any prefix match.  Same as \"0.0.0.0/0 le 32\"\n"
1308        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1309        "Minimum prefix length to be matched\n"
1310        "Minimum prefix length\n"
1311        "Maximum prefix length to be matched\n"
1312        "Maximum prefix length\n")
1313 {
1314         return vty_prefix_list_install(vty, AFI_IP, prefix_list, seq_str,
1315                                        action, dest, ge_str, le_str);
1316 }
1317
1318 DEFPY (no_ip_prefix_list,
1319        no_ip_prefix_list_cmd,
1320        "no ip prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|A.B.C.D/M$dest [{ge (0-32)|le (0-32)}]>",
1321        NO_STR
1322        IP_STR
1323        PREFIX_LIST_STR
1324        "Name of a prefix list\n"
1325        "sequence number of an entry\n"
1326        "Sequence number\n"
1327        "Specify packets to reject\n"
1328        "Specify packets to forward\n"
1329        "Any prefix match.  Same as \"0.0.0.0/0 le 32\"\n"
1330        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1331        "Minimum prefix length to be matched\n"
1332        "Minimum prefix length\n"
1333        "Maximum prefix length to be matched\n"
1334        "Maximum prefix length\n")
1335 {
1336         return vty_prefix_list_uninstall(vty, AFI_IP, prefix_list, seq_str,
1337                                          action, dest, ge_str, le_str);
1338 }
1339
1340 DEFPY (no_ip_prefix_list_all,
1341        no_ip_prefix_list_all_cmd,
1342        "no ip prefix-list WORD",
1343        NO_STR
1344        IP_STR
1345        PREFIX_LIST_STR
1346        "Name of a prefix list\n")
1347 {
1348         return vty_prefix_list_uninstall(vty, AFI_IP, prefix_list, NULL, NULL,
1349                                          NULL, NULL, NULL);
1350 }
1351
1352 DEFPY (ip_prefix_list_sequence_number,
1353        ip_prefix_list_sequence_number_cmd,
1354        "[no] ip prefix-list sequence-number",
1355        NO_STR
1356        IP_STR
1357        PREFIX_LIST_STR
1358        "Include/exclude sequence numbers in NVGEN\n")
1359 {
1360         prefix_master_ipv4.seqnum = no ? 0 : 1;
1361         return CMD_SUCCESS;
1362 }
1363
1364 DEFUN (ip_prefix_list_description,
1365        ip_prefix_list_description_cmd,
1366        "ip prefix-list WORD description LINE...",
1367        IP_STR
1368        PREFIX_LIST_STR
1369        "Name of a prefix list\n"
1370        "Prefix-list specific description\n"
1371        "Up to 80 characters describing this prefix-list\n")
1372 {
1373         int idx_word = 2;
1374         int idx_line = 4;
1375         struct prefix_list *plist;
1376
1377         plist = prefix_list_get(AFI_IP, 0, argv[idx_word]->arg);
1378
1379         if (plist->desc) {
1380                 XFREE(MTYPE_TMP, plist->desc);
1381                 plist->desc = NULL;
1382         }
1383         plist->desc = argv_concat(argv, argc, idx_line);
1384
1385         return CMD_SUCCESS;
1386 }
1387
1388 DEFUN (no_ip_prefix_list_description,
1389        no_ip_prefix_list_description_cmd,
1390        "no ip prefix-list WORD description",
1391        NO_STR
1392        IP_STR
1393        PREFIX_LIST_STR
1394        "Name of a prefix list\n"
1395        "Prefix-list specific description\n")
1396 {
1397         int idx_word = 3;
1398         return vty_prefix_list_desc_unset(vty, AFI_IP, argv[idx_word]->arg);
1399 }
1400
1401 /* ALIAS_FIXME */
1402 DEFUN (no_ip_prefix_list_description_comment,
1403        no_ip_prefix_list_description_comment_cmd,
1404        "no ip prefix-list WORD description LINE...",
1405        NO_STR
1406        IP_STR
1407        PREFIX_LIST_STR
1408        "Name of a prefix list\n"
1409        "Prefix-list specific description\n"
1410        "Up to 80 characters describing this prefix-list\n")
1411 {
1412         return no_ip_prefix_list_description(self, vty, argc, argv);
1413 }
1414
1415 DEFPY (show_ip_prefix_list,
1416        show_ip_prefix_list_cmd,
1417        "show ip prefix-list [WORD [seq$dseq (1-4294967295)$arg]]",
1418        SHOW_STR
1419        IP_STR
1420        PREFIX_LIST_STR
1421        "Name of a prefix list\n"
1422        "sequence number of an entry\n"
1423        "Sequence number\n")
1424 {
1425         enum display_type dtype = normal_display;
1426         if (dseq)
1427                 dtype = sequential_display;
1428
1429         return vty_show_prefix_list(vty, AFI_IP, prefix_list, arg_str, dtype);
1430 }
1431
1432 DEFPY (show_ip_prefix_list_prefix,
1433        show_ip_prefix_list_prefix_cmd,
1434        "show ip prefix-list WORD A.B.C.D/M$prefix [longer$dl|first-match$dfm]",
1435        SHOW_STR
1436        IP_STR
1437        PREFIX_LIST_STR
1438        "Name of a prefix list\n"
1439        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
1440        "Lookup longer prefix\n"
1441        "First matched prefix\n")
1442 {
1443         enum display_type dtype = normal_display;
1444         if (dl)
1445                 dtype = longer_display;
1446         else if (dfm)
1447                 dtype = first_match_display;
1448
1449         return vty_show_prefix_list_prefix(vty, AFI_IP, prefix_list, prefix_str,
1450                                            dtype);
1451 }
1452
1453 DEFPY (show_ip_prefix_list_summary,
1454        show_ip_prefix_list_summary_cmd,
1455        "show ip prefix-list summary [WORD$prefix_list]",
1456        SHOW_STR
1457        IP_STR
1458        PREFIX_LIST_STR
1459        "Summary of prefix lists\n"
1460        "Name of a prefix list\n")
1461 {
1462         return vty_show_prefix_list(vty, AFI_IP, prefix_list, NULL,
1463                                     summary_display);
1464 }
1465
1466 DEFPY (show_ip_prefix_list_detail,
1467        show_ip_prefix_list_detail_cmd,
1468        "show ip prefix-list detail [WORD$prefix_list]",
1469        SHOW_STR
1470        IP_STR
1471        PREFIX_LIST_STR
1472        "Detail of prefix lists\n"
1473        "Name of a prefix list\n")
1474 {
1475         return vty_show_prefix_list(vty, AFI_IP, prefix_list, NULL,
1476                                     detail_display);
1477 }
1478
1479 DEFPY (clear_ip_prefix_list,
1480        clear_ip_prefix_list_cmd,
1481        "clear ip prefix-list [WORD [A.B.C.D/M$prefix]]",
1482        CLEAR_STR
1483        IP_STR
1484        PREFIX_LIST_STR
1485        "Name of a prefix list\n"
1486        "IP prefix <network>/<length>, e.g., 35.0.0.0/8\n")
1487 {
1488         return vty_clear_prefix_list(vty, AFI_IP, prefix_list, prefix_str);
1489 }
1490
1491 DEFPY (ipv6_prefix_list,
1492        ipv6_prefix_list_cmd,
1493        "ipv6 prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|X:X::X:X/M$dest [{ge (0-128)|le (0-128)}]>",
1494        IPV6_STR
1495        PREFIX_LIST_STR
1496        "Name of a prefix list\n"
1497        "sequence number of an entry\n"
1498        "Sequence number\n"
1499        "Specify packets to reject\n"
1500        "Specify packets to forward\n"
1501        "Any prefix match.  Same as \"::0/0 le 128\"\n"
1502        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1503        "Maximum prefix length to be matched\n"
1504        "Maximum prefix length\n"
1505        "Minimum prefix length to be matched\n"
1506        "Minimum prefix length\n")
1507 {
1508         return vty_prefix_list_install(vty, AFI_IP6, prefix_list, seq_str,
1509                                        action, dest, ge_str, le_str);
1510 }
1511
1512 DEFPY (no_ipv6_prefix_list,
1513        no_ipv6_prefix_list_cmd,
1514        "no ipv6 prefix-list WORD [seq (1-4294967295)] <deny|permit>$action <any$dest|X:X::X:X/M$dest [{ge (0-128)|le (0-128)}]>",
1515        NO_STR
1516        IPV6_STR
1517        PREFIX_LIST_STR
1518        "Name of a prefix list\n"
1519        "sequence number of an entry\n"
1520        "Sequence number\n"
1521        "Specify packets to reject\n"
1522        "Specify packets to forward\n"
1523        "Any prefix match.  Same as \"::0/0 le 128\"\n"
1524        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1525        "Maximum prefix length to be matched\n"
1526        "Maximum prefix length\n"
1527        "Minimum prefix length to be matched\n"
1528        "Minimum prefix length\n")
1529 {
1530         return vty_prefix_list_uninstall(vty, AFI_IP6, prefix_list, seq_str,
1531                                          action, dest, ge_str, le_str);
1532 }
1533
1534 DEFPY (no_ipv6_prefix_list_all,
1535        no_ipv6_prefix_list_all_cmd,
1536        "no ipv6 prefix-list WORD",
1537        NO_STR
1538        IPV6_STR
1539        PREFIX_LIST_STR
1540        "Name of a prefix list\n")
1541 {
1542         return vty_prefix_list_uninstall(vty, AFI_IP6, prefix_list, NULL, NULL,
1543                                          NULL, NULL, NULL);
1544 }
1545
1546 DEFPY (ipv6_prefix_list_sequence_number,
1547        ipv6_prefix_list_sequence_number_cmd,
1548        "[no] ipv6 prefix-list sequence-number",
1549        NO_STR
1550        IPV6_STR
1551        PREFIX_LIST_STR
1552        "Include/exclude sequence numbers in NVGEN\n")
1553 {
1554         prefix_master_ipv6.seqnum = no ? 0 : 1;
1555         return CMD_SUCCESS;
1556 }
1557
1558 DEFUN (ipv6_prefix_list_description,
1559        ipv6_prefix_list_description_cmd,
1560        "ipv6 prefix-list WORD description LINE...",
1561        IPV6_STR
1562        PREFIX_LIST_STR
1563        "Name of a prefix list\n"
1564        "Prefix-list specific description\n"
1565        "Up to 80 characters describing this prefix-list\n")
1566 {
1567         int idx_word = 2;
1568         int iddx_line = 4;
1569         struct prefix_list *plist;
1570
1571         plist = prefix_list_get(AFI_IP6, 0, argv[idx_word]->arg);
1572
1573         if (plist->desc) {
1574                 XFREE(MTYPE_TMP, plist->desc);
1575                 plist->desc = NULL;
1576         }
1577         plist->desc = argv_concat(argv, argc, iddx_line);
1578
1579         return CMD_SUCCESS;
1580 }
1581
1582 DEFUN (no_ipv6_prefix_list_description,
1583        no_ipv6_prefix_list_description_cmd,
1584        "no ipv6 prefix-list WORD description",
1585        NO_STR
1586        IPV6_STR
1587        PREFIX_LIST_STR
1588        "Name of a prefix list\n"
1589        "Prefix-list specific description\n")
1590 {
1591         int idx_word = 3;
1592         return vty_prefix_list_desc_unset(vty, AFI_IP6, argv[idx_word]->arg);
1593 }
1594
1595 /* ALIAS_FIXME */
1596 DEFUN (no_ipv6_prefix_list_description_comment,
1597        no_ipv6_prefix_list_description_comment_cmd,
1598        "no ipv6 prefix-list WORD description LINE...",
1599        NO_STR
1600        IPV6_STR
1601        PREFIX_LIST_STR
1602        "Name of a prefix list\n"
1603        "Prefix-list specific description\n"
1604        "Up to 80 characters describing this prefix-list\n")
1605 {
1606         return no_ipv6_prefix_list_description(self, vty, argc, argv);
1607 }
1608
1609
1610 DEFPY (show_ipv6_prefix_list,
1611        show_ipv6_prefix_list_cmd,
1612        "show ipv6 prefix-list [WORD [seq$dseq (1-4294967295)$arg]]",
1613        SHOW_STR
1614        IPV6_STR
1615        PREFIX_LIST_STR
1616        "Name of a prefix list\n"
1617        "sequence number of an entry\n"
1618        "Sequence number\n")
1619 {
1620         enum display_type dtype = normal_display;
1621         if (dseq)
1622                 dtype = sequential_display;
1623
1624         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, arg_str, dtype);
1625 }
1626
1627 DEFPY (show_ipv6_prefix_list_prefix,
1628        show_ipv6_prefix_list_prefix_cmd,
1629        "show ipv6 prefix-list WORD X:X::X:X/M$prefix [longer$dl|first-match$dfm]",
1630        SHOW_STR
1631        IPV6_STR
1632        PREFIX_LIST_STR
1633        "Name of a prefix list\n"
1634        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
1635        "Lookup longer prefix\n"
1636        "First matched prefix\n")
1637 {
1638         enum display_type dtype = normal_display;
1639         if (dl)
1640                 dtype = longer_display;
1641         else if (dfm)
1642                 dtype = first_match_display;
1643
1644         return vty_show_prefix_list_prefix(vty, AFI_IP6, prefix_list,
1645                                            prefix_str, dtype);
1646 }
1647
1648 DEFPY (show_ipv6_prefix_list_summary,
1649        show_ipv6_prefix_list_summary_cmd,
1650        "show ipv6 prefix-list summary [WORD$prefix-list]",
1651        SHOW_STR
1652        IPV6_STR
1653        PREFIX_LIST_STR
1654        "Summary of prefix lists\n"
1655        "Name of a prefix list\n")
1656 {
1657         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, NULL,
1658                                     summary_display);
1659 }
1660
1661 DEFPY (show_ipv6_prefix_list_detail,
1662        show_ipv6_prefix_list_detail_cmd,
1663        "show ipv6 prefix-list detail [WORD$prefix-list]",
1664        SHOW_STR
1665        IPV6_STR
1666        PREFIX_LIST_STR
1667        "Detail of prefix lists\n"
1668        "Name of a prefix list\n")
1669 {
1670         return vty_show_prefix_list(vty, AFI_IP6, prefix_list, NULL,
1671                                     detail_display);
1672 }
1673
1674 DEFPY (clear_ipv6_prefix_list,
1675        clear_ipv6_prefix_list_cmd,
1676        "clear ipv6 prefix-list [WORD [X:X::X:X/M$prefix]]",
1677        CLEAR_STR
1678        IPV6_STR
1679        PREFIX_LIST_STR
1680        "Name of a prefix list\n"
1681        "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n")
1682 {
1683         return vty_clear_prefix_list(vty, AFI_IP6, prefix_list, prefix_str);
1684 }
1685
1686 /* Configuration write function. */
1687 static int config_write_prefix_afi(afi_t afi, struct vty *vty)
1688 {
1689         struct prefix_list *plist;
1690         struct prefix_list_entry *pentry;
1691         struct prefix_master *master;
1692         int write = 0;
1693
1694         master = prefix_master_get(afi, 0);
1695         if (master == NULL)
1696                 return 0;
1697
1698         if (!master->seqnum) {
1699                 vty_out(vty, "no ip%s prefix-list sequence-number\n",
1700                         afi == AFI_IP ? "" : "v6");
1701                 vty_out(vty, "!\n");
1702         }
1703
1704         for (plist = master->num.head; plist; plist = plist->next) {
1705                 if (plist->desc) {
1706                         vty_out(vty, "ip%s prefix-list %s description %s\n",
1707                                 afi == AFI_IP ? "" : "v6", plist->name,
1708                                 plist->desc);
1709                         write++;
1710                 }
1711
1712                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1713                         vty_out(vty, "ip%s prefix-list %s ",
1714                                 afi == AFI_IP ? "" : "v6", plist->name);
1715
1716                         if (master->seqnum)
1717                                 vty_out(vty, "seq %u ", pentry->seq);
1718
1719                         vty_out(vty, "%s ", prefix_list_type_str(pentry));
1720
1721                         if (pentry->any)
1722                                 vty_out(vty, "any");
1723                         else {
1724                                 struct prefix *p = &pentry->prefix;
1725                                 char buf[BUFSIZ];
1726
1727                                 vty_out(vty, "%s/%d",
1728                                         inet_ntop(p->family, &p->u.prefix, buf,
1729                                                   BUFSIZ),
1730                                         p->prefixlen);
1731
1732                                 if (pentry->ge)
1733                                         vty_out(vty, " ge %d", pentry->ge);
1734                                 if (pentry->le)
1735                                         vty_out(vty, " le %d", pentry->le);
1736                         }
1737                         vty_out(vty, "\n");
1738                         write++;
1739                 }
1740                 /* vty_out (vty, "!\n"); */
1741         }
1742
1743         for (plist = master->str.head; plist; plist = plist->next) {
1744                 if (plist->desc) {
1745                         vty_out(vty, "ip%s prefix-list %s description %s\n",
1746                                 afi == AFI_IP ? "" : "v6", plist->name,
1747                                 plist->desc);
1748                         write++;
1749                 }
1750
1751                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1752                         vty_out(vty, "ip%s prefix-list %s ",
1753                                 afi == AFI_IP ? "" : "v6", plist->name);
1754
1755                         if (master->seqnum)
1756                                 vty_out(vty, "seq %u ", pentry->seq);
1757
1758                         vty_out(vty, "%s", prefix_list_type_str(pentry));
1759
1760                         if (pentry->any)
1761                                 vty_out(vty, " any");
1762                         else {
1763                                 struct prefix *p = &pentry->prefix;
1764                                 char buf[BUFSIZ];
1765
1766                                 vty_out(vty, " %s/%d",
1767                                         inet_ntop(p->family, &p->u.prefix, buf,
1768                                                   BUFSIZ),
1769                                         p->prefixlen);
1770
1771                                 if (pentry->ge)
1772                                         vty_out(vty, " ge %d", pentry->ge);
1773                                 if (pentry->le)
1774                                         vty_out(vty, " le %d", pentry->le);
1775                         }
1776                         vty_out(vty, "\n");
1777                         write++;
1778                 }
1779         }
1780
1781         return write;
1782 }
1783
1784 struct stream *prefix_bgp_orf_entry(struct stream *s, struct prefix_list *plist,
1785                                     u_char init_flag, u_char permit_flag,
1786                                     u_char deny_flag)
1787 {
1788         struct prefix_list_entry *pentry;
1789
1790         if (!plist)
1791                 return s;
1792
1793         for (pentry = plist->head; pentry; pentry = pentry->next) {
1794                 u_char flag = init_flag;
1795                 struct prefix *p = &pentry->prefix;
1796
1797                 flag |= (pentry->type == PREFIX_PERMIT ? permit_flag
1798                                                        : deny_flag);
1799                 stream_putc(s, flag);
1800                 stream_putl(s, (u_int32_t)pentry->seq);
1801                 stream_putc(s, (u_char)pentry->ge);
1802                 stream_putc(s, (u_char)pentry->le);
1803                 stream_put_prefix(s, p);
1804         }
1805
1806         return s;
1807 }
1808
1809 int prefix_bgp_orf_set(char *name, afi_t afi, struct orf_prefix *orfp,
1810                        int permit, int set)
1811 {
1812         struct prefix_list *plist;
1813         struct prefix_list_entry *pentry;
1814
1815         /* ge and le value check */
1816         if (orfp->ge && orfp->ge <= orfp->p.prefixlen)
1817                 return CMD_WARNING_CONFIG_FAILED;
1818         if (orfp->le && orfp->le <= orfp->p.prefixlen)
1819                 return CMD_WARNING_CONFIG_FAILED;
1820         if (orfp->le && orfp->ge > orfp->le)
1821                 return CMD_WARNING_CONFIG_FAILED;
1822
1823         if (orfp->ge && orfp->le == (afi == AFI_IP ? 32 : 128))
1824                 orfp->le = 0;
1825
1826         plist = prefix_list_get(afi, 1, name);
1827         if (!plist)
1828                 return CMD_WARNING_CONFIG_FAILED;
1829
1830         if (set) {
1831                 pentry = prefix_list_entry_make(
1832                         &orfp->p, (permit ? PREFIX_PERMIT : PREFIX_DENY),
1833                         orfp->seq, orfp->le, orfp->ge, 0);
1834
1835                 if (prefix_entry_dup_check(plist, pentry)) {
1836                         prefix_list_entry_free(pentry);
1837                         return CMD_WARNING_CONFIG_FAILED;
1838                 }
1839
1840                 prefix_list_entry_add(plist, pentry);
1841         } else {
1842                 pentry = prefix_list_entry_lookup(
1843                         plist, &orfp->p, (permit ? PREFIX_PERMIT : PREFIX_DENY),
1844                         orfp->seq, orfp->le, orfp->ge);
1845
1846                 if (!pentry)
1847                         return CMD_WARNING_CONFIG_FAILED;
1848
1849                 prefix_list_entry_delete(plist, pentry, 1);
1850         }
1851
1852         return CMD_SUCCESS;
1853 }
1854
1855 void prefix_bgp_orf_remove_all(afi_t afi, char *name)
1856 {
1857         struct prefix_list *plist;
1858
1859         plist = prefix_bgp_orf_lookup(afi, name);
1860         if (plist)
1861                 prefix_list_delete(plist);
1862 }
1863
1864 /* return prefix count */
1865 int prefix_bgp_show_prefix_list(struct vty *vty, afi_t afi, char *name,
1866                                 u_char use_json)
1867 {
1868         struct prefix_list *plist;
1869         struct prefix_list_entry *pentry;
1870         json_object *json = NULL;
1871         json_object *json_prefix = NULL;
1872         json_object *json_list = NULL;
1873
1874         plist = prefix_bgp_orf_lookup(afi, name);
1875         if (!plist)
1876                 return 0;
1877
1878         if (!vty)
1879                 return plist->count;
1880
1881         if (use_json) {
1882                 json = json_object_new_object();
1883                 json_prefix = json_object_new_object();
1884                 json_list = json_object_new_object();
1885
1886                 json_object_int_add(json_prefix, "prefixListCounter",
1887                                     plist->count);
1888                 json_object_string_add(json_prefix, "prefixListName",
1889                                        plist->name);
1890
1891                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1892                         struct prefix *p = &pentry->prefix;
1893                         char buf_a[BUFSIZ];
1894                         char buf_b[BUFSIZ];
1895
1896                         sprintf(buf_a, "%s/%d",
1897                                 inet_ntop(p->family, &p->u.prefix, buf_b,
1898                                           BUFSIZ),
1899                                 p->prefixlen);
1900
1901                         json_object_int_add(json_list, "seq", pentry->seq);
1902                         json_object_string_add(json_list, "seqPrefixListType",
1903                                                prefix_list_type_str(pentry));
1904
1905                         if (pentry->ge)
1906                                 json_object_int_add(json_list, "ge",
1907                                                     pentry->ge);
1908                         if (pentry->le)
1909                                 json_object_int_add(json_list, "le",
1910                                                     pentry->le);
1911
1912                         json_object_object_add(json_prefix, buf_a, json_list);
1913                 }
1914                 if (afi == AFI_IP)
1915                         json_object_object_add(json, "ipPrefixList",
1916                                                json_prefix);
1917                 else
1918                         json_object_object_add(json, "ipv6PrefixList",
1919                                                json_prefix);
1920
1921                 vty_out(vty, "%s\n", json_object_to_json_string_ext(
1922                                              json, JSON_C_TO_STRING_PRETTY));
1923                 json_object_free(json);
1924         } else {
1925                 vty_out(vty, "ip%s prefix-list %s: %d entries\n",
1926                         afi == AFI_IP ? "" : "v6", plist->name, plist->count);
1927
1928                 for (pentry = plist->head; pentry; pentry = pentry->next) {
1929                         struct prefix *p = &pentry->prefix;
1930                         char buf[BUFSIZ];
1931
1932                         vty_out(vty, "   seq %u %s %s/%d", pentry->seq,
1933                                 prefix_list_type_str(pentry),
1934                                 inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ),
1935                                 p->prefixlen);
1936
1937                         if (pentry->ge)
1938                                 vty_out(vty, " ge %d", pentry->ge);
1939                         if (pentry->le)
1940                                 vty_out(vty, " le %d", pentry->le);
1941
1942                         vty_out(vty, "\n");
1943                 }
1944         }
1945         return plist->count;
1946 }
1947
1948 static void prefix_list_reset_afi(afi_t afi, int orf)
1949 {
1950         struct prefix_list *plist;
1951         struct prefix_list *next;
1952         struct prefix_master *master;
1953
1954         master = prefix_master_get(afi, orf);
1955         if (master == NULL)
1956                 return;
1957
1958         for (plist = master->num.head; plist; plist = next) {
1959                 next = plist->next;
1960                 prefix_list_delete(plist);
1961         }
1962         for (plist = master->str.head; plist; plist = next) {
1963                 next = plist->next;
1964                 prefix_list_delete(plist);
1965         }
1966
1967         assert(master->num.head == NULL);
1968         assert(master->num.tail == NULL);
1969
1970         assert(master->str.head == NULL);
1971         assert(master->str.tail == NULL);
1972
1973         master->seqnum = 1;
1974         master->recent = NULL;
1975 }
1976
1977
1978 /* Prefix-list node. */
1979 static struct cmd_node prefix_node = {PREFIX_NODE,
1980                                       "", /* Prefix list has no interface. */
1981                                       1};
1982
1983 static int config_write_prefix_ipv4(struct vty *vty)
1984 {
1985         return config_write_prefix_afi(AFI_IP, vty);
1986 }
1987
1988 static void plist_autocomplete_afi(afi_t afi, vector comps,
1989                                    struct cmd_token *token)
1990 {
1991         struct prefix_list *plist;
1992         struct prefix_master *master;
1993
1994         master = prefix_master_get(afi, 0);
1995         if (master == NULL)
1996                 return;
1997
1998         for (plist = master->str.head; plist; plist = plist->next)
1999                 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, plist->name));
2000         for (plist = master->num.head; plist; plist = plist->next)
2001                 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, plist->name));
2002 }
2003
2004 static void plist_autocomplete(vector comps, struct cmd_token *token)
2005 {
2006         plist_autocomplete_afi(AFI_IP, comps, token);
2007         plist_autocomplete_afi(AFI_IP6, comps, token);
2008 }
2009
2010 static const struct cmd_variable_handler plist_var_handlers[] = {
2011         {/* "prefix-list WORD" */
2012          .varname = "prefix_list",
2013          .completions = plist_autocomplete},
2014         {.completions = NULL}};
2015
2016
2017 static void prefix_list_init_ipv4(void)
2018 {
2019         install_node(&prefix_node, config_write_prefix_ipv4);
2020
2021         install_element(CONFIG_NODE, &ip_prefix_list_cmd);
2022         install_element(CONFIG_NODE, &no_ip_prefix_list_cmd);
2023         install_element(CONFIG_NODE, &no_ip_prefix_list_all_cmd);
2024
2025         install_element(CONFIG_NODE, &ip_prefix_list_description_cmd);
2026         install_element(CONFIG_NODE, &no_ip_prefix_list_description_cmd);
2027         install_element(CONFIG_NODE,
2028                         &no_ip_prefix_list_description_comment_cmd);
2029
2030         install_element(CONFIG_NODE, &ip_prefix_list_sequence_number_cmd);
2031
2032         install_element(VIEW_NODE, &show_ip_prefix_list_cmd);
2033         install_element(VIEW_NODE, &show_ip_prefix_list_prefix_cmd);
2034         install_element(VIEW_NODE, &show_ip_prefix_list_summary_cmd);
2035         install_element(VIEW_NODE, &show_ip_prefix_list_detail_cmd);
2036
2037         install_element(ENABLE_NODE, &clear_ip_prefix_list_cmd);
2038 }
2039
2040 /* Prefix-list node. */
2041 static struct cmd_node prefix_ipv6_node = {
2042         PREFIX_IPV6_NODE, "", /* Prefix list has no interface. */
2043         1};
2044
2045 static int config_write_prefix_ipv6(struct vty *vty)
2046 {
2047         return config_write_prefix_afi(AFI_IP6, vty);
2048 }
2049
2050 static void prefix_list_init_ipv6(void)
2051 {
2052         install_node(&prefix_ipv6_node, config_write_prefix_ipv6);
2053
2054         install_element(CONFIG_NODE, &ipv6_prefix_list_cmd);
2055         install_element(CONFIG_NODE, &no_ipv6_prefix_list_cmd);
2056         install_element(CONFIG_NODE, &no_ipv6_prefix_list_all_cmd);
2057
2058         install_element(CONFIG_NODE, &ipv6_prefix_list_description_cmd);
2059         install_element(CONFIG_NODE, &no_ipv6_prefix_list_description_cmd);
2060         install_element(CONFIG_NODE,
2061                         &no_ipv6_prefix_list_description_comment_cmd);
2062
2063         install_element(CONFIG_NODE, &ipv6_prefix_list_sequence_number_cmd);
2064
2065         install_element(VIEW_NODE, &show_ipv6_prefix_list_cmd);
2066         install_element(VIEW_NODE, &show_ipv6_prefix_list_prefix_cmd);
2067         install_element(VIEW_NODE, &show_ipv6_prefix_list_summary_cmd);
2068         install_element(VIEW_NODE, &show_ipv6_prefix_list_detail_cmd);
2069
2070         install_element(ENABLE_NODE, &clear_ipv6_prefix_list_cmd);
2071 }
2072
2073 void prefix_list_init()
2074 {
2075         cmd_variable_handler_register(plist_var_handlers);
2076
2077         prefix_list_init_ipv4();
2078         prefix_list_init_ipv6();
2079 }
2080
2081 void prefix_list_reset()
2082 {
2083         prefix_list_reset_afi(AFI_IP, 0);
2084         prefix_list_reset_afi(AFI_IP6, 0);
2085         prefix_list_reset_afi(AFI_IP, 1);
2086         prefix_list_reset_afi(AFI_IP6, 1);
2087 }