ospfd/ospf_zebra.c

   1 /*
   2  * Zebra connect library for OSPFd
   3  * Copyright (C) 1997, 98, 99, 2000 Kunihiro Ishiguro, Toshiaki Takada
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include "thread.h"
  25 #include "command.h"
  26 #include "network.h"
  27 #include "prefix.h"
  28 #include "routemap.h"
  29 #include "table.h"
  30 #include "stream.h"
  31 #include "memory.h"
  32 #include "zclient.h"
  33 #include "filter.h"
  34 #include "plist.h"
  35 #include "log.h"
  36 #include "lib/bfd.h"
  37 #include "nexthop.h"
  38
  39 #include "ospfd/ospfd.h"
  40 #include "ospfd/ospf_interface.h"
  41 #include "ospfd/ospf_ism.h"
  42 #include "ospfd/ospf_asbr.h"
  43 #include "ospfd/ospf_asbr.h"
  44 #include "ospfd/ospf_abr.h"
  45 #include "ospfd/ospf_lsa.h"
  46 #include "ospfd/ospf_dump.h"
  47 #include "ospfd/ospf_route.h"
  48 #include "ospfd/ospf_lsdb.h"
  49 #include "ospfd/ospf_neighbor.h"
  50 #include "ospfd/ospf_nsm.h"
  51 #include "ospfd/ospf_zebra.h"
  52 #include "ospfd/ospf_te.h"
  53
  54 DEFINE_MTYPE_STATIC(OSPFD, OSPF_EXTERNAL, "OSPF External route table")
  55 DEFINE_MTYPE_STATIC(OSPFD, OSPF_REDISTRIBUTE, "OSPF Redistriute")
  56 DEFINE_MTYPE_STATIC(OSPFD, OSPF_DIST_ARGS, "OSPF Distribute arguments")
  57
  58 /* Zebra structure to hold current status. */
  59 struct zclient *zclient = NULL;
  60
  61 /* For registering threads. */
  62 extern struct thread_master *master;
  63
  64 /* Router-id update message from zebra. */
  65 static int ospf_router_id_update_zebra(ZAPI_CALLBACK_ARGS)
  66 {
  67         struct ospf *ospf = NULL;
  68         struct prefix router_id;
  69         zebra_router_id_update_read(zclient->ibuf, &router_id);
  70
  71         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE)) {
  72                 char buf[PREFIX2STR_BUFFER];
  73                 prefix2str(&router_id, buf, sizeof(buf));
  74                 zlog_debug("Zebra rcvd: router id update %s vrf %s id %u", buf,
  75                            ospf_vrf_id_to_name(vrf_id), vrf_id);
  76         }
  77
  78         ospf = ospf_lookup_by_vrf_id(vrf_id);
  79
  80         if (ospf != NULL) {
  81                 ospf->router_id_zebra = router_id.u.prefix4;
  82                 ospf_router_id_update(ospf);
  83         } else {
  84                 if (IS_DEBUG_OSPF_EVENT) {
  85                         char buf[PREFIX2STR_BUFFER];
  86
  87                         prefix2str(&router_id, buf, sizeof(buf));
  88                         zlog_debug(
  89                                 "%s: ospf instance not found for vrf %s id %u router_id %s",
  90                                 __func__, ospf_vrf_id_to_name(vrf_id), vrf_id,
  91                                 buf);
  92                 }
  93         }
  94         return 0;
  95 }
  96
  97 static int ospf_interface_address_add(ZAPI_CALLBACK_ARGS)
  98 {
  99         struct connected *c;
 100         struct ospf *ospf = NULL;
 101
 102
 103         c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
 104
 105         if (c == NULL)
 106                 return 0;
 107
 108         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE)) {
 109                 char buf[PREFIX2STR_BUFFER];
 110                 prefix2str(c->address, buf, sizeof(buf));
 111                 zlog_debug("Zebra: interface %s address add %s vrf %s id %u",
 112                            c->ifp->name, buf, ospf_vrf_id_to_name(vrf_id),
 113                            vrf_id);
 114         }
 115
 116         ospf = ospf_lookup_by_vrf_id(vrf_id);
 117         if (!ospf)
 118                 return 0;
 119
 120         ospf_if_update(ospf, c->ifp);
 121
 122         ospf_if_interface(c->ifp);
 123
 124         return 0;
 125 }
 126
 127 static int ospf_interface_address_delete(ZAPI_CALLBACK_ARGS)
 128 {
 129         struct connected *c;
 130         struct interface *ifp;
 131         struct ospf_interface *oi;
 132         struct route_node *rn;
 133         struct prefix p;
 134
 135         c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
 136
 137         if (c == NULL)
 138                 return 0;
 139
 140         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE)) {
 141                 char buf[PREFIX2STR_BUFFER];
 142                 prefix2str(c->address, buf, sizeof(buf));
 143                 zlog_debug("Zebra: interface %s address delete %s",
 144                            c->ifp->name, buf);
 145         }
 146
 147         ifp = c->ifp;
 148         p = *c->address;
 149         p.prefixlen = IPV4_MAX_PREFIXLEN;
 150
 151         rn = route_node_lookup(IF_OIFS(ifp), &p);
 152         if (!rn) {
 153                 connected_free(&c);
 154                 return 0;
 155         }
 156
 157         assert(rn->info);
 158         oi = rn->info;
 159         route_unlock_node(rn);
 160
 161         /* Call interface hook functions to clean up */
 162         ospf_if_free(oi);
 163
 164         ospf_if_interface(c->ifp);
 165
 166         connected_free(&c);
 167
 168         return 0;
 169 }
 170
 171 static int ospf_interface_link_params(ZAPI_CALLBACK_ARGS)
 172 {
 173         struct interface *ifp;
 174
 175         ifp = zebra_interface_link_params_read(zclient->ibuf, vrf_id);
 176
 177         if (ifp == NULL)
 178                 return 0;
 179
 180         /* Update TE TLV */
 181         ospf_mpls_te_update_if(ifp);
 182
 183         return 0;
 184 }
 185
 186 /* VRF update for an interface. */
 187 static int ospf_interface_vrf_update(ZAPI_CALLBACK_ARGS)
 188 {
 189         struct interface *ifp = NULL;
 190         vrf_id_t new_vrf_id;
 191
 192         ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
 193                                               &new_vrf_id);
 194         if (!ifp)
 195                 return 0;
 196
 197         if (IS_DEBUG_OSPF_EVENT)
 198                 zlog_debug(
 199                         "%s: Rx Interface %s VRF change vrf_id %u New vrf %s id %u",
 200                         __func__, ifp->name, vrf_id,
 201                         ospf_vrf_id_to_name(new_vrf_id), new_vrf_id);
 202
 203         /*if_update(ifp, ifp->name, strlen(ifp->name), new_vrf_id);*/
 204         if_update_to_new_vrf(ifp, new_vrf_id);
 205
 206         return 0;
 207 }
 208
 209 void ospf_zebra_add(struct ospf *ospf, struct prefix_ipv4 *p,
 210                     struct ospf_route * or)
 211 {
 212         struct zapi_route api;
 213         struct zapi_nexthop *api_nh;
 214         uint8_t distance;
 215         struct ospf_path *path;
 216         struct listnode *node;
 217         int count = 0;
 218
 219         memset(&api, 0, sizeof(api));
 220         api.vrf_id = ospf->vrf_id;
 221         api.type = ZEBRA_ROUTE_OSPF;
 222         api.instance = ospf->instance;
 223         api.safi = SAFI_UNICAST;
 224
 225         memcpy(&api.prefix, p, sizeof(*p));
 226         SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
 227
 228         /* Metric value. */
 229         SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
 230         if (or->path_type == OSPF_PATH_TYPE1_EXTERNAL)
 231                 api.metric = or->cost + or->u.ext.type2_cost;
 232         else if (or->path_type == OSPF_PATH_TYPE2_EXTERNAL)
 233                 api.metric = or->u.ext.type2_cost;
 234         else
 235                 api.metric = or->cost;
 236
 237         /* Check if path type is ASE */
 238         if (((or->path_type == OSPF_PATH_TYPE1_EXTERNAL)
 239              || (or->path_type == OSPF_PATH_TYPE2_EXTERNAL))
 240             && (or->u.ext.tag > 0) && (or->u.ext.tag <= ROUTE_TAG_MAX)) {
 241                 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
 242                 api.tag = or->u.ext.tag;
 243         }
 244
 245         /* Distance value. */
 246         distance = ospf_distance_apply(ospf, p, or);
 247         if (distance) {
 248                 SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
 249                 api.distance = distance;
 250         }
 251
 252         /* Nexthop, ifindex, distance and metric information. */
 253         for (ALL_LIST_ELEMENTS_RO(or->paths, node, path)) {
 254                 if (count >= MULTIPATH_NUM)
 255                         break;
 256                 api_nh = &api.nexthops[count];
 257 #ifdef HAVE_NETLINK
 258                 if (path->unnumbered || (path->nexthop.s_addr != INADDR_ANY
 259                                          && path->ifindex != 0)) {
 260 #else  /* HAVE_NETLINK */
 261                 if (path->nexthop.s_addr != INADDR_ANY && path->ifindex != 0) {
 262 #endif /* HAVE_NETLINK */
 263                         api_nh->gate.ipv4 = path->nexthop;
 264                         api_nh->ifindex = path->ifindex;
 265                         api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
 266                 } else if (path->nexthop.s_addr != INADDR_ANY) {
 267                         api_nh->gate.ipv4 = path->nexthop;
 268                         api_nh->type = NEXTHOP_TYPE_IPV4;
 269                 } else {
 270                         api_nh->ifindex = path->ifindex;
 271                         api_nh->type = NEXTHOP_TYPE_IFINDEX;
 272                 }
 273                 api_nh->vrf_id = ospf->vrf_id;
 274                 count++;
 275
 276                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 277                         char buf[2][INET_ADDRSTRLEN];
 278                         struct interface *ifp;
 279
 280                         ifp = if_lookup_by_index(path->ifindex, ospf->vrf_id);
 281
 282                         zlog_debug(
 283                                 "Zebra: Route add %s nexthop %s, ifindex=%d %s",
 284                                 prefix2str(p, buf[0], sizeof(buf[0])),
 285                                 inet_ntop(AF_INET, &path->nexthop,
 286                                           buf[1], sizeof(buf[1])),
 287                                 path->ifindex, ifp ? ifp->name : " ");
 288                 }
 289         }
 290         api.nexthop_num = count;
 291
 292         zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
 293 }
 294
 295 void ospf_zebra_delete(struct ospf *ospf, struct prefix_ipv4 *p,
 296                        struct ospf_route * or)
 297 {
 298         struct zapi_route api;
 299
 300         memset(&api, 0, sizeof(api));
 301         api.vrf_id = ospf->vrf_id;
 302         api.type = ZEBRA_ROUTE_OSPF;
 303         api.instance = ospf->instance;
 304         api.safi = SAFI_UNICAST;
 305         memcpy(&api.prefix, p, sizeof(*p));
 306
 307         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 308                 char buf[PREFIX2STR_BUFFER];
 309                 zlog_debug("Zebra: Route delete %s",
 310                            prefix2str(p, buf, sizeof(buf)));
 311         }
 312
 313         zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 314 }
 315
 316 void ospf_zebra_add_discard(struct ospf *ospf, struct prefix_ipv4 *p)
 317 {
 318         struct zapi_route api;
 319
 320         memset(&api, 0, sizeof(api));
 321         api.vrf_id = ospf->vrf_id;
 322         api.type = ZEBRA_ROUTE_OSPF;
 323         api.instance = ospf->instance;
 324         api.safi = SAFI_UNICAST;
 325         memcpy(&api.prefix, p, sizeof(*p));
 326         zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
 327
 328         zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
 329
 330         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 331                 char buf[PREFIX2STR_BUFFER];
 332                 zlog_debug("Zebra: Route add discard %s",
 333                            prefix2str(p, buf, sizeof(buf)));
 334         }
 335 }
 336
 337 void ospf_zebra_delete_discard(struct ospf *ospf, struct prefix_ipv4 *p)
 338 {
 339         struct zapi_route api;
 340
 341         memset(&api, 0, sizeof(api));
 342         api.vrf_id = ospf->vrf_id;
 343         api.type = ZEBRA_ROUTE_OSPF;
 344         api.instance = ospf->instance;
 345         api.safi = SAFI_UNICAST;
 346         memcpy(&api.prefix, p, sizeof(*p));
 347         zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
 348
 349         zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 350
 351         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 352                 char buf[PREFIX2STR_BUFFER];
 353                 zlog_debug("Zebra: Route delete discard %s",
 354                            prefix2str(p, buf, sizeof(buf)));
 355         }
 356 }
 357
 358 struct ospf_external *ospf_external_lookup(struct ospf *ospf, uint8_t type,
 359                                            unsigned short instance)
 360 {
 361         struct list *ext_list;
 362         struct listnode *node;
 363         struct ospf_external *ext;
 364
 365         ext_list = ospf->external[type];
 366         if (!ext_list)
 367                 return (NULL);
 368
 369         for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext))
 370                 if (ext->instance == instance)
 371                         return ext;
 372
 373         return NULL;
 374 }
 375
 376 struct ospf_external *ospf_external_add(struct ospf *ospf, uint8_t type,
 377                                         unsigned short instance)
 378 {
 379         struct list *ext_list;
 380         struct ospf_external *ext;
 381
 382         ext = ospf_external_lookup(ospf, type, instance);
 383         if (ext)
 384                 return ext;
 385
 386         if (!ospf->external[type])
 387                 ospf->external[type] = list_new();
 388
 389         ext_list = ospf->external[type];
 390         ext = XCALLOC(MTYPE_OSPF_EXTERNAL, sizeof(struct ospf_external));
 391         ext->instance = instance;
 392         EXTERNAL_INFO(ext) = route_table_init();
 393
 394         listnode_add(ext_list, ext);
 395
 396         return ext;
 397 }
 398
 399 void ospf_external_del(struct ospf *ospf, uint8_t type, unsigned short instance)
 400 {
 401         struct ospf_external *ext;
 402
 403         ext = ospf_external_lookup(ospf, type, instance);
 404
 405         if (ext) {
 406                 if (EXTERNAL_INFO(ext))
 407                         route_table_finish(EXTERNAL_INFO(ext));
 408
 409                 listnode_delete(ospf->external[type], ext);
 410
 411                 if (!ospf->external[type]->count)
 412                         list_delete(&ospf->external[type]);
 413
 414                 XFREE(MTYPE_OSPF_EXTERNAL, ext);
 415         }
 416 }
 417
 418 struct ospf_redist *ospf_redist_lookup(struct ospf *ospf, uint8_t type,
 419                                        unsigned short instance)
 420 {
 421         struct list *red_list;
 422         struct listnode *node;
 423         struct ospf_redist *red;
 424
 425         red_list = ospf->redist[type];
 426         if (!red_list)
 427                 return (NULL);
 428
 429         for (ALL_LIST_ELEMENTS_RO(red_list, node, red))
 430                 if (red->instance == instance)
 431                         return red;
 432
 433         return NULL;
 434 }
 435
 436 struct ospf_redist *ospf_redist_add(struct ospf *ospf, uint8_t type,
 437                                     unsigned short instance)
 438 {
 439         struct list *red_list;
 440         struct ospf_redist *red;
 441
 442         red = ospf_redist_lookup(ospf, type, instance);
 443         if (red)
 444                 return red;
 445
 446         if (!ospf->redist[type])
 447                 ospf->redist[type] = list_new();
 448
 449         red_list = ospf->redist[type];
 450         red = XCALLOC(MTYPE_OSPF_REDISTRIBUTE, sizeof(struct ospf_redist));
 451         red->instance = instance;
 452         red->dmetric.type = -1;
 453         red->dmetric.value = -1;
 454         ROUTEMAP_NAME(red) = NULL;
 455         ROUTEMAP(red) = NULL;
 456
 457         listnode_add(red_list, red);
 458
 459         return red;
 460 }
 461
 462 void ospf_redist_del(struct ospf *ospf, uint8_t type, unsigned short instance)
 463 {
 464         struct ospf_redist *red;
 465
 466         red = ospf_redist_lookup(ospf, type, instance);
 467
 468         if (red) {
 469                 listnode_delete(ospf->redist[type], red);
 470                 if (!ospf->redist[type]->count) {
 471                         list_delete(&ospf->redist[type]);
 472                 }
 473                 ospf_routemap_unset(red);
 474                 XFREE(MTYPE_OSPF_REDISTRIBUTE, red);
 475         }
 476 }
 477
 478
 479 int ospf_is_type_redistributed(struct ospf *ospf, int type,
 480                                unsigned short instance)
 481 {
 482         return (DEFAULT_ROUTE_TYPE(type)
 483                         ? vrf_bitmap_check(zclient->default_information[AFI_IP],
 484                                            ospf->vrf_id)
 485                         : ((instance
 486                             && redist_check_instance(
 487                                        &zclient->mi_redist[AFI_IP][type],
 488                                        instance))
 489                            || (!instance
 490                                && vrf_bitmap_check(
 491                                           zclient->redist[AFI_IP][type],
 492                                           ospf->vrf_id))));
 493 }
 494
 495 int ospf_redistribute_set(struct ospf *ospf, int type, unsigned short instance,
 496                           int mtype, int mvalue)
 497 {
 498         int force = 0;
 499         struct ospf_redist *red;
 500
 501         red = ospf_redist_lookup(ospf, type, instance);
 502
 503         if (red == NULL) {
 504                 zlog_err(
 505                          "Redistribute[%s][%d]: Lookup failed  Type[%d] , Metric[%d]",
 506                          ospf_redist_string(type), instance,
 507                          metric_type(ospf, type, instance),
 508                          metric_value(ospf, type, instance));
 509                 return CMD_WARNING_CONFIG_FAILED;
 510         }
 511
 512         if (ospf_is_type_redistributed(ospf, type, instance)) {
 513                 if (mtype != red->dmetric.type) {
 514                         red->dmetric.type = mtype;
 515                         force = LSA_REFRESH_FORCE;
 516                 }
 517                 if (mvalue != red->dmetric.value) {
 518                         red->dmetric.value = mvalue;
 519                         force = LSA_REFRESH_FORCE;
 520                 }
 521
 522                 ospf_external_lsa_refresh_type(ospf, type, instance, force);
 523
 524                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 525                         zlog_debug(
 526                                 "Redistribute[%s][%d]: Refresh  Type[%d], Metric[%d]",
 527                                 ospf_redist_string(type), instance,
 528                                 metric_type(ospf, type, instance),
 529                                 metric_value(ospf, type, instance));
 530
 531                 return CMD_SUCCESS;
 532         }
 533
 534         red->dmetric.type = mtype;
 535         red->dmetric.value = mvalue;
 536
 537         ospf_external_add(ospf, type, instance);
 538
 539         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type,
 540                              instance, ospf->vrf_id);
 541
 542         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 543                 zlog_debug(
 544                         "Redistribute[%s][%d] vrf id %u: Start  Type[%d], Metric[%d]",
 545                         ospf_redist_string(type), instance, ospf->vrf_id,
 546                         metric_type(ospf, type, instance),
 547                         metric_value(ospf, type, instance));
 548
 549         ospf_asbr_status_update(ospf, ++ospf->redistribute);
 550
 551         return CMD_SUCCESS;
 552 }
 553
 554 int ospf_redistribute_unset(struct ospf *ospf, int type,
 555                             unsigned short instance)
 556 {
 557         if (type == zclient->redist_default && instance == zclient->instance)
 558                 return CMD_SUCCESS;
 559
 560         if (!ospf_is_type_redistributed(ospf, type, instance))
 561                 return CMD_SUCCESS;
 562
 563         zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, AFI_IP, type,
 564                              instance, ospf->vrf_id);
 565
 566         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 567                 zlog_debug("Redistribute[%s][%d] vrf id %u: Stop",
 568                            ospf_redist_string(type), instance, ospf->vrf_id);
 569
 570         /* Remove the routes from OSPF table. */
 571         ospf_redistribute_withdraw(ospf, type, instance);
 572
 573         ospf_external_del(ospf, type, instance);
 574
 575         ospf_asbr_status_update(ospf, --ospf->redistribute);
 576
 577         return CMD_SUCCESS;
 578 }
 579
 580 int ospf_redistribute_default_set(struct ospf *ospf, int originate, int mtype,
 581                                   int mvalue)
 582 {
 583         struct prefix_ipv4 p;
 584         struct in_addr nexthop;
 585         int cur_originate = ospf->default_originate;
 586         const char *type_str = NULL;
 587
 588         nexthop.s_addr = INADDR_ANY;
 589         p.family = AF_INET;
 590         p.prefix.s_addr = INADDR_ANY;
 591         p.prefixlen = 0;
 592
 593         ospf->default_originate = originate;
 594
 595         if (cur_originate == originate) {
 596                 /* Refresh the lsa since metric might different */
 597                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 598                         zlog_debug(
 599                                 "Redistribute[%s]: Refresh  Type[%d], Metric[%d]",
 600                                 ospf_redist_string(DEFAULT_ROUTE),
 601                                 metric_type(ospf, DEFAULT_ROUTE, 0),
 602                                 metric_value(ospf, DEFAULT_ROUTE, 0));
 603
 604                 ospf_external_lsa_refresh_default(ospf);
 605                 return CMD_SUCCESS;
 606         }
 607
 608         switch (cur_originate) {
 609         case DEFAULT_ORIGINATE_NONE:
 610                 break;
 611         case DEFAULT_ORIGINATE_ZEBRA:
 612                 zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE,
 613                                  zclient, AFI_IP, ospf->vrf_id);
 614                 ospf->redistribute--;
 615                 break;
 616         case DEFAULT_ORIGINATE_ALWAYS:
 617                 ospf_external_info_delete(ospf, DEFAULT_ROUTE, 0, p);
 618                 ospf_external_del(ospf, DEFAULT_ROUTE, 0);
 619                 ospf->redistribute--;
 620                 break;
 621         }
 622
 623         switch (originate) {
 624         case DEFAULT_ORIGINATE_NONE:
 625                 type_str = "none";
 626                 break;
 627         case DEFAULT_ORIGINATE_ZEBRA:
 628                 type_str = "normal";
 629                 ospf->redistribute++;
 630                 zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD,
 631                                              zclient, AFI_IP, ospf->vrf_id);
 632                 break;
 633         case DEFAULT_ORIGINATE_ALWAYS:
 634                 type_str = "always";
 635                 ospf->redistribute++;
 636                 ospf_external_add(ospf, DEFAULT_ROUTE, 0);
 637                 ospf_external_info_add(ospf, DEFAULT_ROUTE, 0, p, 0, nexthop,
 638                                        0);
 639                 break;
 640         }
 641
 642         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 643                 zlog_debug("Redistribute[DEFAULT]: %s Type[%d], Metric[%d]",
 644                 type_str,
 645                 metric_type(ospf, DEFAULT_ROUTE, 0),
 646                 metric_value(ospf, DEFAULT_ROUTE, 0));
 647
 648         ospf_external_lsa_refresh_default(ospf);
 649         ospf_asbr_status_update(ospf, ospf->redistribute);
 650         return CMD_SUCCESS;
 651 }
 652
 653 static int ospf_external_lsa_originate_check(struct ospf *ospf,
 654                                              struct external_info *ei)
 655 {
 656         /* If prefix is multicast, then do not originate LSA. */
 657         if (IN_MULTICAST(htonl(ei->p.prefix.s_addr))) {
 658                 zlog_info(
 659                         "LSA[Type5:%s]: Not originate AS-external-LSA, "
 660                         "Prefix belongs multicast",
 661                         inet_ntoa(ei->p.prefix));
 662                 return 0;
 663         }
 664
 665         /* Take care of default-originate. */
 666         if (is_prefix_default(&ei->p))
 667                 if (ospf->default_originate == DEFAULT_ORIGINATE_NONE) {
 668                         zlog_info(
 669                                 "LSA[Type5:0.0.0.0]: Not originate AS-external-LSA "
 670                                 "for default");
 671                         return 0;
 672                 }
 673
 674         return 1;
 675 }
 676
 677 /* If connected prefix is OSPF enable interface, then do not announce. */
 678 int ospf_distribute_check_connected(struct ospf *ospf, struct external_info *ei)
 679 {
 680         struct listnode *node;
 681         struct ospf_interface *oi;
 682
 683
 684         for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi))
 685                 if (prefix_match(oi->address, (struct prefix *)&ei->p))
 686                         return 0;
 687         return 1;
 688 }
 689
 690 /* return 1 if external LSA must be originated, 0 otherwise */
 691 int ospf_redistribute_check(struct ospf *ospf, struct external_info *ei,
 692                             int *changed)
 693 {
 694         struct route_map_set_values save_values;
 695         struct prefix_ipv4 *p = &ei->p;
 696         struct ospf_redist *red;
 697         uint8_t type = is_prefix_default(&ei->p) ? DEFAULT_ROUTE : ei->type;
 698         unsigned short instance = is_prefix_default(&ei->p) ? 0 : ei->instance;
 699
 700         if (changed)
 701                 *changed = 0;
 702
 703         if (!ospf_external_lsa_originate_check(ospf, ei))
 704                 return 0;
 705
 706         /* Take care connected route. */
 707         if (type == ZEBRA_ROUTE_CONNECT
 708             && !ospf_distribute_check_connected(ospf, ei))
 709                 return 0;
 710
 711         if (!DEFAULT_ROUTE_TYPE(type) && DISTRIBUTE_NAME(ospf, type))
 712                 /* distirbute-list exists, but access-list may not? */
 713                 if (DISTRIBUTE_LIST(ospf, type))
 714                         if (access_list_apply(DISTRIBUTE_LIST(ospf, type), p)
 715                             == FILTER_DENY) {
 716                                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 717                                         char buf[PREFIX2STR_BUFFER];
 718                                         zlog_debug(
 719                                                 "Redistribute[%s]: %s filtered by distribute-list.",
 720                                                 ospf_redist_string(type),
 721                                                 prefix2str(p, buf, sizeof(buf)));
 722                                 }
 723                                 return 0;
 724                         }
 725
 726         save_values = ei->route_map_set;
 727         ospf_reset_route_map_set_values(&ei->route_map_set);
 728
 729         /* apply route-map if needed */
 730         red = ospf_redist_lookup(ospf, type, instance);
 731         if (red && ROUTEMAP_NAME(red)) {
 732                 route_map_result_t ret;
 733
 734                 ret = route_map_apply(ROUTEMAP(red), (struct prefix *)p,
 735                                       RMAP_OSPF, ei);
 736
 737                 if (ret == RMAP_DENYMATCH) {
 738                         ei->route_map_set = save_values;
 739                         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 740                                 char buf[PREFIX2STR_BUFFER];
 741                                 zlog_debug(
 742                                         "Redistribute[%s]: %s filtered by route-map.",
 743                                         ospf_redist_string(type),
 744                                         prefix2str(p, buf, sizeof(buf)));
 745                         }
 746                         return 0;
 747                 }
 748
 749                 /* check if 'route-map set' changed something */
 750                 if (changed)
 751                         *changed = !ospf_route_map_set_compare(
 752                                 &ei->route_map_set, &save_values);
 753         }
 754
 755         return 1;
 756 }
 757
 758 /* OSPF route-map set for redistribution */
 759 void ospf_routemap_set(struct ospf_redist *red, const char *name)
 760 {
 761         if (ROUTEMAP_NAME(red)) {
 762                 route_map_counter_decrement(ROUTEMAP(red));
 763                 free(ROUTEMAP_NAME(red));
 764         }
 765
 766         ROUTEMAP_NAME(red) = strdup(name);
 767         ROUTEMAP(red) = route_map_lookup_by_name(name);
 768         route_map_counter_increment(ROUTEMAP(red));
 769 }
 770
 771 void ospf_routemap_unset(struct ospf_redist *red)
 772 {
 773         if (ROUTEMAP_NAME(red)) {
 774                 route_map_counter_decrement(ROUTEMAP(red));
 775                 free(ROUTEMAP_NAME(red));
 776         }
 777
 778         ROUTEMAP_NAME(red) = NULL;
 779         ROUTEMAP(red) = NULL;
 780 }
 781
 782 /* Zebra route add and delete treatment. */
 783 static int ospf_zebra_read_route(ZAPI_CALLBACK_ARGS)
 784 {
 785         struct zapi_route api;
 786         struct prefix_ipv4 p;
 787         unsigned long ifindex;
 788         struct in_addr nexthop;
 789         struct external_info *ei;
 790         struct ospf *ospf;
 791         int i;
 792         uint8_t rt_type;
 793
 794         ospf = ospf_lookup_by_vrf_id(vrf_id);
 795         if (ospf == NULL)
 796                 return 0;
 797
 798         if (zapi_route_decode(zclient->ibuf, &api) < 0)
 799                 return -1;
 800
 801         ifindex = api.nexthops[0].ifindex;
 802         nexthop = api.nexthops[0].gate.ipv4;
 803         rt_type = api.type;
 804
 805         memcpy(&p, &api.prefix, sizeof(p));
 806         if (IPV4_NET127(ntohl(p.prefix.s_addr)))
 807                 return 0;
 808
 809         /* Re-destributed route is default route.
 810          * Here, route type is used as 'ZEBRA_ROUTE_KERNEL' for
 811          * updating ex-info. But in resetting (no default-info
 812          * originate)ZEBRA_ROUTE_MAX is used to delete the ex-info.
 813          * Resolved this inconsistency by maintaining same route type.
 814          */
 815         if (is_prefix_default(&p))
 816                 rt_type = DEFAULT_ROUTE;
 817
 818         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 819                 char buf_prefix[PREFIX_STRLEN];
 820                 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
 821
 822                 zlog_debug("%s: cmd %s from client %s: vrf_id %d, p %s",
 823                            __func__, zserv_command_string(cmd),
 824                            zebra_route_string(api.type), vrf_id, buf_prefix);
 825         }
 826
 827         if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) {
 828                 /* XXX|HACK|TODO|FIXME:
 829                  * Maybe we should ignore reject/blackhole routes? Testing
 830                  * shows that there is no problems though and this is only way
 831                  * to "summarize" routes in ASBR at the moment. Maybe we need
 832                  * just a better generalised solution for these types?
 833                  */
 834
 835                 /* Protocol tag overwrites all other tag value sent by zebra */
 836                 if (ospf->dtag[rt_type] > 0)
 837                         api.tag = ospf->dtag[rt_type];
 838
 839                 /*
 840                  * Given zebra sends update for a prefix via ADD message, it
 841                  * should
 842                  * be considered as an implicit DEL for that prefix with other
 843                  * source
 844                  * types.
 845                  */
 846                 for (i = 0; i <= ZEBRA_ROUTE_MAX; i++)
 847                         if (i != rt_type)
 848                                 ospf_external_info_delete(ospf, i, api.instance,
 849                                                           p);
 850
 851                 ei = ospf_external_info_add(ospf, rt_type, api.instance, p,
 852                                             ifindex, nexthop, api.tag);
 853                 if (ei == NULL) {
 854                         /* Nothing has changed, so nothing to do; return */
 855                         return 0;
 856                 }
 857                 if (ospf->router_id.s_addr != INADDR_ANY) {
 858                         if (ei) {
 859                                 if (is_prefix_default(&p))
 860                                         ospf_external_lsa_refresh_default(ospf);
 861                                 else {
 862                                         struct ospf_lsa *current;
 863
 864                                         current = ospf_external_info_find_lsa(
 865                                                 ospf, &ei->p);
 866                                         if (!current)
 867                                                 ospf_external_lsa_originate(
 868                                                         ospf, ei);
 869                                         else {
 870                                                 if (IS_DEBUG_OSPF(
 871                                                             zebra,
 872                                                             ZEBRA_REDISTRIBUTE))
 873                                                         zlog_debug(
 874                                                                 "ospf_zebra_read_route() : %s refreshing LSA",
 875                                                                 inet_ntoa(
 876                                                                         p.prefix));
 877                                                 ospf_external_lsa_refresh(
 878                                                         ospf, current, ei,
 879                                                         LSA_REFRESH_FORCE);
 880                                         }
 881                                 }
 882                         }
 883                 }
 884         } else /* if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_DEL) */
 885         {
 886                 ospf_external_info_delete(ospf, rt_type, api.instance, p);
 887                 if (is_prefix_default(&p))
 888                         ospf_external_lsa_refresh_default(ospf);
 889                 else
 890                         ospf_external_lsa_flush(ospf, rt_type, &p,
 891                                                 ifindex /*, nexthop */);
 892         }
 893
 894         return 0;
 895 }
 896
 897
 898 int ospf_distribute_list_out_set(struct ospf *ospf, int type, const char *name)
 899 {
 900         /* Lookup access-list for distribute-list. */
 901         DISTRIBUTE_LIST(ospf, type) = access_list_lookup(AFI_IP, name);
 902
 903         /* Clear previous distribute-name. */
 904         if (DISTRIBUTE_NAME(ospf, type))
 905                 free(DISTRIBUTE_NAME(ospf, type));
 906
 907         /* Set distribute-name. */
 908         DISTRIBUTE_NAME(ospf, type) = strdup(name);
 909
 910         /* If access-list have been set, schedule update timer. */
 911         if (DISTRIBUTE_LIST(ospf, type))
 912                 ospf_distribute_list_update(ospf, type, 0);
 913
 914         return CMD_SUCCESS;
 915 }
 916
 917 int ospf_distribute_list_out_unset(struct ospf *ospf, int type,
 918                                    const char *name)
 919 {
 920         /* Schedule update timer. */
 921         if (DISTRIBUTE_LIST(ospf, type))
 922                 ospf_distribute_list_update(ospf, type, 0);
 923
 924         /* Unset distribute-list. */
 925         DISTRIBUTE_LIST(ospf, type) = NULL;
 926
 927         /* Clear distribute-name. */
 928         if (DISTRIBUTE_NAME(ospf, type))
 929                 free(DISTRIBUTE_NAME(ospf, type));
 930
 931         DISTRIBUTE_NAME(ospf, type) = NULL;
 932
 933         return CMD_SUCCESS;
 934 }
 935
 936 /* distribute-list update timer. */
 937 static int ospf_distribute_list_update_timer(struct thread *thread)
 938 {
 939         struct route_node *rn;
 940         struct external_info *ei;
 941         struct route_table *rt;
 942         struct ospf_lsa *lsa;
 943         int type, default_refresh = 0, arg_type;
 944         struct ospf *ospf = NULL;
 945         void **arg = THREAD_ARG(thread);
 946
 947         ospf = (struct ospf *)arg[0];
 948         arg_type = (int)(intptr_t)arg[1];
 949
 950         if (ospf == NULL)
 951                 return 0;
 952
 953         ospf->t_distribute_update = NULL;
 954
 955         zlog_info("Zebra[Redistribute]: distribute-list update timer fired!");
 956
 957         if (IS_DEBUG_OSPF_EVENT) {
 958                 zlog_debug(
 959                         "%s: ospf distribute-list update arg_type %d vrf %s id %d",
 960                         __func__, arg_type, ospf_vrf_id_to_name(ospf->vrf_id),
 961                         ospf->vrf_id);
 962         }
 963
 964         /* foreach all external info. */
 965         for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
 966                 struct list *ext_list;
 967                 struct listnode *node;
 968                 struct ospf_external *ext;
 969
 970                 ext_list = ospf->external[type];
 971                 if (!ext_list)
 972                         continue;
 973
 974                 for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) {
 975                         rt = ext->external_info;
 976                         if (!rt)
 977                                 continue;
 978                         for (rn = route_top(rt); rn; rn = route_next(rn))
 979                                 if ((ei = rn->info) != NULL) {
 980                                         if (is_prefix_default(&ei->p))
 981                                                 default_refresh = 1;
 982                                         else if (
 983                                                 (lsa = ospf_external_info_find_lsa(
 984                                                          ospf, &ei->p)))
 985                                                 ospf_external_lsa_refresh(
 986                                                         ospf, lsa, ei,
 987                                                         LSA_REFRESH_IF_CHANGED);
 988                                         else
 989                                                 ospf_external_lsa_originate(
 990                                                         ospf, ei);
 991                                 }
 992                 }
 993         }
 994         if (default_refresh)
 995                 ospf_external_lsa_refresh_default(ospf);
 996
 997         XFREE(MTYPE_OSPF_DIST_ARGS, arg);
 998         return 0;
 999 }
1000
1001 /* Update distribute-list and set timer to apply access-list. */
1002 void ospf_distribute_list_update(struct ospf *ospf, int type,
1003                                  unsigned short instance)
1004 {
1005         struct ospf_external *ext;
1006         void **args = XCALLOC(MTYPE_OSPF_DIST_ARGS, sizeof(void *) * 2);
1007
1008         args[0] = ospf;
1009         args[1] = (void *)((ptrdiff_t)type);
1010
1011         /* External info does not exist. */
1012         ext = ospf_external_lookup(ospf, type, instance);
1013         if (!ext || !EXTERNAL_INFO(ext)) {
1014                 XFREE(MTYPE_OSPF_DIST_ARGS, args);
1015                 return;
1016         }
1017
1018         /* If exists previously invoked thread, then let it continue. */
1019         if (ospf->t_distribute_update) {
1020                 XFREE(MTYPE_OSPF_DIST_ARGS, args);
1021                 return;
1022         }
1023
1024         /* Set timer. */
1025         ospf->t_distribute_update = NULL;
1026         thread_add_timer_msec(master, ospf_distribute_list_update_timer, args,
1027                               ospf->min_ls_interval,
1028                               &ospf->t_distribute_update);
1029 }
1030
1031 /* If access-list is updated, apply some check. */
1032 static void ospf_filter_update(struct access_list *access)
1033 {
1034         struct ospf *ospf;
1035         int type;
1036         int abr_inv = 0;
1037         struct ospf_area *area;
1038         struct listnode *node, *n1;
1039
1040         /* If OSPF instance does not exist, return right now. */
1041         if (listcount(om->ospf) == 0)
1042                 return;
1043
1044         /* Iterate all ospf [VRF] instances */
1045         for (ALL_LIST_ELEMENTS_RO(om->ospf, n1, ospf)) {
1046                 /* Update distribute-list, and apply filter. */
1047                 for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
1048                         struct list *red_list;
1049                         struct ospf_redist *red;
1050
1051                         red_list = ospf->redist[type];
1052                         if (red_list)
1053                                 for (ALL_LIST_ELEMENTS_RO(red_list, node,
1054                                                           red)) {
1055                                         if (ROUTEMAP(red)) {
1056                                                 /* if route-map is not NULL it
1057                                                  * may be
1058                                                  * using this access list */
1059                                                 ospf_distribute_list_update(
1060                                                         ospf, type,
1061                                                         red->instance);
1062                                         }
1063                                 }
1064
1065                         /* There is place for route-map for default-information
1066                          * (ZEBRA_ROUTE_MAX),
1067                          * but no distribute list. */
1068                         if (type == ZEBRA_ROUTE_MAX)
1069                                 break;
1070
1071                         if (DISTRIBUTE_NAME(ospf, type)) {
1072                                 /* Keep old access-list for distribute-list. */
1073                                 struct access_list *old =
1074                                         DISTRIBUTE_LIST(ospf, type);
1075
1076                                 /* Update access-list for distribute-list. */
1077                                 DISTRIBUTE_LIST(ospf, type) =
1078                                         access_list_lookup(
1079                                                 AFI_IP,
1080                                                 DISTRIBUTE_NAME(ospf, type));
1081
1082                                 /* No update for this distribute type. */
1083                                 if (old == NULL
1084                                     && DISTRIBUTE_LIST(ospf, type) == NULL)
1085                                         continue;
1086
1087                                 /* Schedule distribute-list update timer. */
1088                                 if (DISTRIBUTE_LIST(ospf, type) == NULL
1089                                     || strcmp(DISTRIBUTE_NAME(ospf, type),
1090                                               access->name)
1091                                                == 0)
1092                                         ospf_distribute_list_update(ospf, type,
1093                                                                     0);
1094                         }
1095                 }
1096
1097                 /* Update Area access-list. */
1098                 for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) {
1099                         if (EXPORT_NAME(area)) {
1100                                 EXPORT_LIST(area) = NULL;
1101                                 abr_inv++;
1102                         }
1103
1104                         if (IMPORT_NAME(area)) {
1105                                 IMPORT_LIST(area) = NULL;
1106                                 abr_inv++;
1107                         }
1108                 }
1109
1110                 /* Schedule ABR tasks -- this will be changed -- takada. */
1111                 if (IS_OSPF_ABR(ospf) && abr_inv)
1112                         ospf_schedule_abr_task(ospf);
1113         }
1114 }
1115
1116 /* If prefix-list is updated, do some updates. */
1117 void ospf_prefix_list_update(struct prefix_list *plist)
1118 {
1119         struct ospf *ospf = NULL;
1120         int type;
1121         int abr_inv = 0;
1122         struct ospf_area *area;
1123         struct listnode *node, *n1;
1124
1125         /* If OSPF instatnce does not exist, return right now. */
1126         if (listcount(om->ospf) == 0)
1127                 return;
1128
1129         /* Iterate all ospf [VRF] instances */
1130         for (ALL_LIST_ELEMENTS_RO(om->ospf, n1, ospf)) {
1131
1132                 /* Update all route-maps which are used
1133                  * as redistribution filters.
1134                  * They might use prefix-list.
1135                  */
1136                 for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
1137                         struct list *red_list;
1138                         struct ospf_redist *red;
1139
1140                         red_list = ospf->redist[type];
1141                         if (red_list) {
1142                                 for (ALL_LIST_ELEMENTS_RO(red_list, node,
1143                                                           red)) {
1144                                         if (ROUTEMAP(red)) {
1145                                                 /* if route-map is not NULL
1146                                                  * it may be using
1147                                                  * this prefix list */
1148                                                 ospf_distribute_list_update(
1149                                                         ospf, type,
1150                                                         red->instance);
1151                                         }
1152                                 }
1153                         }
1154                 }
1155
1156                 /* Update area filter-lists. */
1157                 for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) {
1158                         /* Update filter-list in. */
1159                         if (PREFIX_NAME_IN(area))
1160                                 if (strcmp(PREFIX_NAME_IN(area),
1161                                            prefix_list_name(plist))
1162                                     == 0) {
1163                                         PREFIX_LIST_IN(area) =
1164                                                 prefix_list_lookup(
1165                                                         AFI_IP,
1166                                                         PREFIX_NAME_IN(area));
1167                                         abr_inv++;
1168                                 }
1169
1170                         /* Update filter-list out. */
1171                         if (PREFIX_NAME_OUT(area))
1172                                 if (strcmp(PREFIX_NAME_OUT(area),
1173                                            prefix_list_name(plist))
1174                                     == 0) {
1175                                         PREFIX_LIST_IN(area) =
1176                                                 prefix_list_lookup(
1177                                                         AFI_IP,
1178                                                         PREFIX_NAME_OUT(area));
1179                                         abr_inv++;
1180                                 }
1181                 }
1182
1183                 /* Schedule ABR task. */
1184                 if (IS_OSPF_ABR(ospf) && abr_inv)
1185                         ospf_schedule_abr_task(ospf);
1186         }
1187 }
1188
1189 static struct ospf_distance *ospf_distance_new(void)
1190 {
1191         return XCALLOC(MTYPE_OSPF_DISTANCE, sizeof(struct ospf_distance));
1192 }
1193
1194 static void ospf_distance_free(struct ospf_distance *odistance)
1195 {
1196         XFREE(MTYPE_OSPF_DISTANCE, odistance);
1197 }
1198
1199 int ospf_distance_set(struct vty *vty, struct ospf *ospf,
1200                       const char *distance_str, const char *ip_str,
1201                       const char *access_list_str)
1202 {
1203         int ret;
1204         struct prefix_ipv4 p;
1205         uint8_t distance;
1206         struct route_node *rn;
1207         struct ospf_distance *odistance;
1208
1209         ret = str2prefix_ipv4(ip_str, &p);
1210         if (ret == 0) {
1211                 vty_out(vty, "Malformed prefix\n");
1212                 return CMD_WARNING_CONFIG_FAILED;
1213         }
1214
1215         distance = atoi(distance_str);
1216
1217         /* Get OSPF distance node. */
1218         rn = route_node_get(ospf->distance_table, (struct prefix *)&p);
1219         if (rn->info) {
1220                 odistance = rn->info;
1221                 route_unlock_node(rn);
1222         } else {
1223                 odistance = ospf_distance_new();
1224                 rn->info = odistance;
1225         }
1226
1227         /* Set distance value. */
1228         odistance->distance = distance;
1229
1230         /* Reset access-list configuration. */
1231         if (odistance->access_list) {
1232                 free(odistance->access_list);
1233                 odistance->access_list = NULL;
1234         }
1235         if (access_list_str)
1236                 odistance->access_list = strdup(access_list_str);
1237
1238         return CMD_SUCCESS;
1239 }
1240
1241 int ospf_distance_unset(struct vty *vty, struct ospf *ospf,
1242                         const char *distance_str, const char *ip_str,
1243                         char const *access_list_str)
1244 {
1245         int ret;
1246         struct prefix_ipv4 p;
1247         struct route_node *rn;
1248         struct ospf_distance *odistance;
1249
1250         ret = str2prefix_ipv4(ip_str, &p);
1251         if (ret == 0) {
1252                 vty_out(vty, "Malformed prefix\n");
1253                 return CMD_WARNING_CONFIG_FAILED;
1254         }
1255
1256         rn = route_node_lookup(ospf->distance_table, (struct prefix *)&p);
1257         if (!rn) {
1258                 vty_out(vty, "Can't find specified prefix\n");
1259                 return CMD_WARNING_CONFIG_FAILED;
1260         }
1261
1262         odistance = rn->info;
1263
1264         if (odistance->access_list)
1265                 free(odistance->access_list);
1266         ospf_distance_free(odistance);
1267
1268         rn->info = NULL;
1269         route_unlock_node(rn);
1270         route_unlock_node(rn);
1271
1272         return CMD_SUCCESS;
1273 }
1274
1275 void ospf_distance_reset(struct ospf *ospf)
1276 {
1277         struct route_node *rn;
1278         struct ospf_distance *odistance;
1279
1280         for (rn = route_top(ospf->distance_table); rn; rn = route_next(rn))
1281                 if ((odistance = rn->info) != NULL) {
1282                         if (odistance->access_list)
1283                                 free(odistance->access_list);
1284                         ospf_distance_free(odistance);
1285                         rn->info = NULL;
1286                         route_unlock_node(rn);
1287                 }
1288 }
1289
1290 uint8_t ospf_distance_apply(struct ospf *ospf, struct prefix_ipv4 *p,
1291                             struct ospf_route * or)
1292 {
1293
1294         if (ospf == NULL)
1295                 return 0;
1296
1297         if (ospf->distance_intra)
1298                 if (or->path_type == OSPF_PATH_INTRA_AREA)
1299                         return ospf->distance_intra;
1300
1301         if (ospf->distance_inter)
1302                 if (or->path_type == OSPF_PATH_INTER_AREA)
1303                         return ospf->distance_inter;
1304
1305         if (ospf->distance_external)
1306                 if (or->path_type == OSPF_PATH_TYPE1_EXTERNAL ||
1307                     or->path_type == OSPF_PATH_TYPE2_EXTERNAL)
1308                         return ospf->distance_external;
1309
1310         if (ospf->distance_all)
1311                 return ospf->distance_all;
1312
1313         return 0;
1314 }
1315
1316 void ospf_zebra_vrf_register(struct ospf *ospf)
1317 {
1318         if (!zclient || zclient->sock < 0 || !ospf)
1319                 return;
1320
1321         if (ospf->vrf_id != VRF_UNKNOWN) {
1322                 if (IS_DEBUG_OSPF_EVENT)
1323                         zlog_debug("%s: Register VRF %s id %u", __func__,
1324                                    ospf_vrf_id_to_name(ospf->vrf_id),
1325                                    ospf->vrf_id);
1326                 zclient_send_reg_requests(zclient, ospf->vrf_id);
1327         }
1328 }
1329
1330 void ospf_zebra_vrf_deregister(struct ospf *ospf)
1331 {
1332         if (!zclient || zclient->sock < 0 || !ospf)
1333                 return;
1334
1335         if (ospf->vrf_id != VRF_DEFAULT && ospf->vrf_id != VRF_UNKNOWN) {
1336                 if (IS_DEBUG_OSPF_EVENT)
1337                         zlog_debug("%s: De-Register VRF %s id %u to Zebra.",
1338                                    __func__, ospf_vrf_id_to_name(ospf->vrf_id),
1339                                    ospf->vrf_id);
1340                 /* Deregister for router-id, interfaces,
1341                  * redistributed routes. */
1342                 zclient_send_dereg_requests(zclient, ospf->vrf_id);
1343         }
1344 }
1345 static void ospf_zebra_connected(struct zclient *zclient)
1346 {
1347         /* Send the client registration */
1348         bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER, VRF_DEFAULT);
1349
1350         zclient_send_reg_requests(zclient, VRF_DEFAULT);
1351 }
1352
1353 void ospf_zebra_init(struct thread_master *master, unsigned short instance)
1354 {
1355         /* Allocate zebra structure. */
1356         zclient = zclient_new(master, &zclient_options_default);
1357         zclient_init(zclient, ZEBRA_ROUTE_OSPF, instance, &ospfd_privs);
1358         zclient->zebra_connected = ospf_zebra_connected;
1359         zclient->router_id_update = ospf_router_id_update_zebra;
1360         zclient->interface_address_add = ospf_interface_address_add;
1361         zclient->interface_address_delete = ospf_interface_address_delete;
1362         zclient->interface_link_params = ospf_interface_link_params;
1363         zclient->interface_vrf_update = ospf_interface_vrf_update;
1364
1365         zclient->redistribute_route_add = ospf_zebra_read_route;
1366         zclient->redistribute_route_del = ospf_zebra_read_route;
1367
1368         access_list_add_hook(ospf_filter_update);
1369         access_list_delete_hook(ospf_filter_update);
1370         prefix_list_add_hook(ospf_prefix_list_update);
1371         prefix_list_delete_hook(ospf_prefix_list_update);
1372 }