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 DEFINE_HOOK(ospf_if_update, (struct interface * ifp), (ifp))
  59 DEFINE_HOOK(ospf_if_delete, (struct interface * ifp), (ifp))
  60
  61 /* Zebra structure to hold current status. */
  62 struct zclient *zclient = NULL;
  63
  64 /* For registering threads. */
  65 extern struct thread_master *master;
  66
  67 /* Router-id update message from zebra. */
  68 static int ospf_router_id_update_zebra(int command, struct zclient *zclient,
  69                                        zebra_size_t length, vrf_id_t vrf_id)
  70 {
  71         struct ospf *ospf = NULL;
  72         struct prefix router_id;
  73         zebra_router_id_update_read(zclient->ibuf, &router_id);
  74
  75         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE)) {
  76                 char buf[PREFIX2STR_BUFFER];
  77                 prefix2str(&router_id, buf, sizeof(buf));
  78                 zlog_debug("Zebra rcvd: router id update %s vrf %s id %u", buf,
  79                            ospf_vrf_id_to_name(vrf_id), vrf_id);
  80         }
  81
  82         ospf = ospf_lookup_by_vrf_id(vrf_id);
  83
  84         if (ospf != NULL) {
  85                 ospf->router_id_zebra = router_id.u.prefix4;
  86                 ospf_router_id_update(ospf);
  87         } else {
  88                 if (IS_DEBUG_OSPF_EVENT) {
  89                         char buf[PREFIX2STR_BUFFER];
  90
  91                         prefix2str(&router_id, buf, sizeof(buf));
  92                         zlog_debug(
  93                                 "%s: ospf instance not found for vrf %s id %u router_id %s",
  94                                 __PRETTY_FUNCTION__,
  95                                 ospf_vrf_id_to_name(vrf_id), vrf_id, buf);
  96                 }
  97         }
  98         return 0;
  99 }
 100
 101 /* Inteface addition message from zebra. */
 102 static int ospf_interface_add(int command, struct zclient *zclient,
 103                               zebra_size_t length, vrf_id_t vrf_id)
 104 {
 105         struct interface *ifp = NULL;
 106         struct ospf *ospf = NULL;
 107
 108         ifp = zebra_interface_add_read(zclient->ibuf, vrf_id);
 109         if (ifp == NULL)
 110                 return 0;
 111
 112         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE))
 113                 zlog_debug(
 114                         "Zebra: interface add %s vrf %s[%u] index %d flags %llx metric %d mtu %d",
 115                         ifp->name, ospf_vrf_id_to_name(ifp->vrf_id),
 116                         ifp->vrf_id, ifp->ifindex,
 117                         (unsigned long long)ifp->flags, ifp->metric, ifp->mtu);
 118
 119         assert(ifp->info);
 120
 121         if (IF_DEF_PARAMS(ifp)
 122             && !OSPF_IF_PARAM_CONFIGURED(IF_DEF_PARAMS(ifp), type)) {
 123                 SET_IF_PARAM(IF_DEF_PARAMS(ifp), type);
 124                 IF_DEF_PARAMS(ifp)->type = ospf_default_iftype(ifp);
 125         }
 126
 127         ospf = ospf_lookup_by_vrf_id(vrf_id);
 128         if (!ospf)
 129                 return 0;
 130
 131         ospf_if_update(ospf, ifp);
 132
 133         hook_call(ospf_if_update, ifp);
 134
 135         return 0;
 136 }
 137
 138 static int ospf_interface_delete(int command, struct zclient *zclient,
 139                                  zebra_size_t length, vrf_id_t vrf_id)
 140 {
 141         struct interface *ifp;
 142         struct stream *s;
 143         struct route_node *rn;
 144
 145         s = zclient->ibuf;
 146         /* zebra_interface_state_read() updates interface structure in iflist */
 147         ifp = zebra_interface_state_read(s, vrf_id);
 148
 149         if (ifp == NULL)
 150                 return 0;
 151
 152         if (if_is_up(ifp))
 153                 zlog_warn("Zebra: got delete of %s, but interface is still up",
 154                           ifp->name);
 155
 156         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE))
 157                 zlog_debug(
 158                         "Zebra: interface delete %s vrf %s[%u] index %d flags %llx metric %d mtu %d",
 159                         ifp->name, ospf_vrf_id_to_name(ifp->vrf_id),
 160                         ifp->vrf_id, ifp->ifindex,
 161                         (unsigned long long)ifp->flags, ifp->metric, ifp->mtu);
 162
 163         hook_call(ospf_if_delete, ifp);
 164
 165         for (rn = route_top(IF_OIFS(ifp)); rn; rn = route_next(rn))
 166                 if (rn->info)
 167                         ospf_if_free((struct ospf_interface *)rn->info);
 168
 169         if_set_index(ifp, IFINDEX_INTERNAL);
 170         return 0;
 171 }
 172
 173 static struct interface *zebra_interface_if_lookup(struct stream *s,
 174                                                    vrf_id_t vrf_id)
 175 {
 176         char ifname_tmp[INTERFACE_NAMSIZ];
 177
 178         /* Read interface name. */
 179         stream_get(ifname_tmp, s, INTERFACE_NAMSIZ);
 180
 181         /* And look it up. */
 182         return if_lookup_by_name(ifname_tmp, vrf_id);
 183 }
 184
 185 static int ospf_interface_state_up(int command, struct zclient *zclient,
 186                                    zebra_size_t length, vrf_id_t vrf_id)
 187 {
 188         struct interface *ifp;
 189         struct ospf_interface *oi;
 190         struct route_node *rn;
 191
 192         ifp = zebra_interface_if_lookup(zclient->ibuf, vrf_id);
 193
 194         if (ifp == NULL)
 195                 return 0;
 196
 197         /* Interface is already up. */
 198         if (if_is_operative(ifp)) {
 199                 /* Temporarily keep ifp values. */
 200                 struct interface if_tmp;
 201                 memcpy(&if_tmp, ifp, sizeof(struct interface));
 202
 203                 zebra_interface_if_set_value(zclient->ibuf, ifp);
 204
 205                 if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE))
 206                         zlog_debug(
 207                                 "Zebra: Interface[%s] state update speed %u -> %u, bw  %d -> %d",
 208                                 ifp->name, if_tmp.speed, ifp->speed,
 209                                 if_tmp.bandwidth, ifp->bandwidth);
 210
 211                 ospf_if_recalculate_output_cost(ifp);
 212
 213                 if (if_tmp.mtu != ifp->mtu) {
 214                         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE))
 215                                 zlog_debug(
 216                                         "Zebra: Interface[%s] MTU change %u -> %u.",
 217                                         ifp->name, if_tmp.mtu, ifp->mtu);
 218
 219                         /* Must reset the interface (simulate down/up) when MTU
 220                          * changes. */
 221                         ospf_if_reset(ifp);
 222                 }
 223                 return 0;
 224         }
 225
 226         zebra_interface_if_set_value(zclient->ibuf, ifp);
 227
 228         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE))
 229                 zlog_debug("Zebra: Interface[%s] state change to up.",
 230                            ifp->name);
 231
 232         for (rn = route_top(IF_OIFS(ifp)); rn; rn = route_next(rn)) {
 233                 if ((oi = rn->info) == NULL)
 234                         continue;
 235
 236                 ospf_if_up(oi);
 237         }
 238
 239         return 0;
 240 }
 241
 242 static int ospf_interface_state_down(int command, struct zclient *zclient,
 243                                      zebra_size_t length, vrf_id_t vrf_id)
 244 {
 245         struct interface *ifp;
 246         struct ospf_interface *oi;
 247         struct route_node *node;
 248
 249         ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
 250
 251         if (ifp == NULL)
 252                 return 0;
 253
 254         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE))
 255                 zlog_debug("Zebra: Interface[%s] state change to down.",
 256                            ifp->name);
 257
 258         for (node = route_top(IF_OIFS(ifp)); node; node = route_next(node)) {
 259                 if ((oi = node->info) == NULL)
 260                         continue;
 261                 ospf_if_down(oi);
 262         }
 263
 264         return 0;
 265 }
 266
 267 static int ospf_interface_address_add(int command, struct zclient *zclient,
 268                                       zebra_size_t length, vrf_id_t vrf_id)
 269 {
 270         struct connected *c;
 271         struct ospf *ospf = NULL;
 272
 273
 274         c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
 275
 276         if (c == NULL)
 277                 return 0;
 278
 279         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE)) {
 280                 char buf[PREFIX2STR_BUFFER];
 281                 prefix2str(c->address, buf, sizeof(buf));
 282                 zlog_debug("Zebra: interface %s address add %s vrf %s id %u",
 283                            c->ifp->name, buf, ospf_vrf_id_to_name(vrf_id),
 284                            vrf_id);
 285         }
 286
 287         ospf = ospf_lookup_by_vrf_id(vrf_id);
 288         if (!ospf)
 289                 return 0;
 290
 291         ospf_if_update(ospf, c->ifp);
 292
 293         hook_call(ospf_if_update, c->ifp);
 294
 295         return 0;
 296 }
 297
 298 static int ospf_interface_address_delete(int command, struct zclient *zclient,
 299                                          zebra_size_t length, vrf_id_t vrf_id)
 300 {
 301         struct connected *c;
 302         struct interface *ifp;
 303         struct ospf_interface *oi;
 304         struct route_node *rn;
 305         struct prefix p;
 306
 307         c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
 308
 309         if (c == NULL)
 310                 return 0;
 311
 312         if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE)) {
 313                 char buf[PREFIX2STR_BUFFER];
 314                 prefix2str(c->address, buf, sizeof(buf));
 315                 zlog_debug("Zebra: interface %s address delete %s",
 316                            c->ifp->name, buf);
 317         }
 318
 319         ifp = c->ifp;
 320         p = *c->address;
 321         p.prefixlen = IPV4_MAX_PREFIXLEN;
 322
 323         rn = route_node_lookup(IF_OIFS(ifp), &p);
 324         if (!rn) {
 325                 connected_free(c);
 326                 return 0;
 327         }
 328
 329         assert(rn->info);
 330         oi = rn->info;
 331         route_unlock_node(rn);
 332
 333         /* Call interface hook functions to clean up */
 334         ospf_if_free(oi);
 335
 336         hook_call(ospf_if_update, c->ifp);
 337
 338         connected_free(c);
 339
 340         return 0;
 341 }
 342
 343 static int ospf_interface_link_params(int command, struct zclient *zclient,
 344                                       zebra_size_t length)
 345 {
 346         struct interface *ifp;
 347
 348         ifp = zebra_interface_link_params_read(zclient->ibuf);
 349
 350         if (ifp == NULL)
 351                 return 0;
 352
 353         /* Update TE TLV */
 354         ospf_mpls_te_update_if(ifp);
 355
 356         return 0;
 357 }
 358
 359 /* VRF update for an interface. */
 360 static int ospf_interface_vrf_update(int command, struct zclient *zclient,
 361                                      zebra_size_t length, vrf_id_t vrf_id)
 362 {
 363         struct interface *ifp = NULL;
 364         vrf_id_t new_vrf_id;
 365
 366         ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
 367                                               &new_vrf_id);
 368         if (!ifp)
 369                 return 0;
 370
 371         if (IS_DEBUG_OSPF_EVENT)
 372                 zlog_debug(
 373                         "%s: Rx Interface %s VRF change vrf_id %u New vrf %s id %u",
 374                         __PRETTY_FUNCTION__, ifp->name, vrf_id,
 375                         ospf_vrf_id_to_name(new_vrf_id), new_vrf_id);
 376
 377         /*if_update(ifp, ifp->name, strlen(ifp->name), new_vrf_id);*/
 378         if_update_to_new_vrf(ifp, new_vrf_id);
 379
 380         return 0;
 381 }
 382
 383 void ospf_zebra_add(struct ospf *ospf, struct prefix_ipv4 *p,
 384                     struct ospf_route * or)
 385 {
 386         struct zapi_route api;
 387         struct zapi_nexthop *api_nh;
 388         uint8_t distance;
 389         struct ospf_path *path;
 390         struct listnode *node;
 391         int count = 0;
 392
 393         memset(&api, 0, sizeof(api));
 394         api.vrf_id = ospf->vrf_id;
 395         api.type = ZEBRA_ROUTE_OSPF;
 396         api.instance = ospf->instance;
 397         api.safi = SAFI_UNICAST;
 398
 399         memcpy(&api.prefix, p, sizeof(*p));
 400         SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
 401
 402         /* Metric value. */
 403         SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
 404         if (or->path_type == OSPF_PATH_TYPE1_EXTERNAL)
 405                 api.metric = or->cost + or->u.ext.type2_cost;
 406         else if (or->path_type == OSPF_PATH_TYPE2_EXTERNAL)
 407                 api.metric = or->u.ext.type2_cost;
 408         else
 409                 api.metric = or->cost;
 410
 411         /* Check if path type is ASE */
 412         if (((or->path_type == OSPF_PATH_TYPE1_EXTERNAL)
 413              || (or->path_type == OSPF_PATH_TYPE2_EXTERNAL))
 414             && (or->u.ext.tag > 0) && (or->u.ext.tag <= ROUTE_TAG_MAX)) {
 415                 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
 416                 api.tag = or->u.ext.tag;
 417         }
 418
 419         /* Distance value. */
 420         distance = ospf_distance_apply(ospf, p, or);
 421         if (distance) {
 422                 SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
 423                 api.distance = distance;
 424         }
 425
 426         /* Nexthop, ifindex, distance and metric information. */
 427         for (ALL_LIST_ELEMENTS_RO(or->paths, node, path)) {
 428                 if (count >= MULTIPATH_NUM)
 429                         break;
 430                 api_nh = &api.nexthops[count];
 431 #ifdef HAVE_NETLINK
 432                 if (path->unnumbered || (path->nexthop.s_addr != INADDR_ANY
 433                                          && path->ifindex != 0)) {
 434 #else  /* HAVE_NETLINK */
 435                 if (path->nexthop.s_addr != INADDR_ANY && path->ifindex != 0) {
 436 #endif /* HAVE_NETLINK */
 437                         api_nh->gate.ipv4 = path->nexthop;
 438                         api_nh->ifindex = path->ifindex;
 439                         api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
 440                 } else if (path->nexthop.s_addr != INADDR_ANY) {
 441                         api_nh->gate.ipv4 = path->nexthop;
 442                         api_nh->type = NEXTHOP_TYPE_IPV4;
 443                 } else {
 444                         api_nh->ifindex = path->ifindex;
 445                         api_nh->type = NEXTHOP_TYPE_IFINDEX;
 446                 }
 447                 api_nh->vrf_id = ospf->vrf_id;
 448                 count++;
 449
 450                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 451                         char buf[2][PREFIX2STR_BUFFER];
 452
 453                         zlog_debug(
 454                                 "Zebra: Route add %s nexthop %s, ifindex=%d",
 455                                 prefix2str(p, buf[0], sizeof(buf[0])),
 456                                 inet_ntop(AF_INET, &path->nexthop,
 457                                           buf[1], sizeof(buf[1])),
 458                                 path->ifindex);
 459                 }
 460         }
 461         api.nexthop_num = count;
 462
 463         zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
 464 }
 465
 466 void ospf_zebra_delete(struct ospf *ospf, struct prefix_ipv4 *p,
 467                        struct ospf_route * or)
 468 {
 469         struct zapi_route api;
 470
 471         memset(&api, 0, sizeof(api));
 472         api.vrf_id = ospf->vrf_id;
 473         api.type = ZEBRA_ROUTE_OSPF;
 474         api.instance = ospf->instance;
 475         api.safi = SAFI_UNICAST;
 476         memcpy(&api.prefix, p, sizeof(*p));
 477
 478         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 479                 char buf[PREFIX2STR_BUFFER];
 480                 zlog_debug("Zebra: Route delete %s",
 481                            prefix2str(p, buf, sizeof(buf)));
 482         }
 483
 484         zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 485 }
 486
 487 void ospf_zebra_add_discard(struct ospf *ospf, struct prefix_ipv4 *p)
 488 {
 489         struct zapi_route api;
 490
 491         memset(&api, 0, sizeof(api));
 492         api.vrf_id = ospf->vrf_id;
 493         api.type = ZEBRA_ROUTE_OSPF;
 494         api.instance = ospf->instance;
 495         api.safi = SAFI_UNICAST;
 496         memcpy(&api.prefix, p, sizeof(*p));
 497         zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
 498
 499         zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
 500
 501         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 502                 char buf[PREFIX2STR_BUFFER];
 503                 zlog_debug("Zebra: Route add discard %s",
 504                            prefix2str(p, buf, sizeof(buf)));
 505         }
 506 }
 507
 508 void ospf_zebra_delete_discard(struct ospf *ospf, struct prefix_ipv4 *p)
 509 {
 510         struct zapi_route api;
 511
 512         memset(&api, 0, sizeof(api));
 513         api.vrf_id = ospf->vrf_id;
 514         api.type = ZEBRA_ROUTE_OSPF;
 515         api.instance = ospf->instance;
 516         api.safi = SAFI_UNICAST;
 517         memcpy(&api.prefix, p, sizeof(*p));
 518         zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
 519
 520         zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 521
 522         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 523                 char buf[PREFIX2STR_BUFFER];
 524                 zlog_debug("Zebra: Route delete discard %s",
 525                            prefix2str(p, buf, sizeof(buf)));
 526         }
 527 }
 528
 529 struct ospf_external *ospf_external_lookup(struct ospf *ospf, uint8_t type,
 530                                            unsigned short instance)
 531 {
 532         struct list *ext_list;
 533         struct listnode *node;
 534         struct ospf_external *ext;
 535
 536         ext_list = ospf->external[type];
 537         if (!ext_list)
 538                 return (NULL);
 539
 540         for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext))
 541                 if (ext->instance == instance)
 542                         return ext;
 543
 544         return NULL;
 545 }
 546
 547 struct ospf_external *ospf_external_add(struct ospf *ospf, uint8_t type,
 548                                         unsigned short instance)
 549 {
 550         struct list *ext_list;
 551         struct ospf_external *ext;
 552
 553         ext = ospf_external_lookup(ospf, type, instance);
 554         if (ext)
 555                 return ext;
 556
 557         if (!ospf->external[type])
 558                 ospf->external[type] = list_new();
 559
 560         ext_list = ospf->external[type];
 561         ext = (struct ospf_external *)XCALLOC(MTYPE_OSPF_EXTERNAL,
 562                                               sizeof(struct ospf_external));
 563         ext->instance = instance;
 564         EXTERNAL_INFO(ext) = route_table_init();
 565
 566         listnode_add(ext_list, ext);
 567
 568         return ext;
 569 }
 570
 571 void ospf_external_del(struct ospf *ospf, uint8_t type, unsigned short instance)
 572 {
 573         struct ospf_external *ext;
 574
 575         ext = ospf_external_lookup(ospf, type, instance);
 576
 577         if (ext) {
 578                 if (EXTERNAL_INFO(ext))
 579                         route_table_finish(EXTERNAL_INFO(ext));
 580
 581                 listnode_delete(ospf->external[type], ext);
 582
 583                 if (!ospf->external[type]->count)
 584                         list_delete_and_null(&ospf->external[type]);
 585
 586                 XFREE(MTYPE_OSPF_EXTERNAL, ext);
 587         }
 588 }
 589
 590 struct ospf_redist *ospf_redist_lookup(struct ospf *ospf, uint8_t type,
 591                                        unsigned short instance)
 592 {
 593         struct list *red_list;
 594         struct listnode *node;
 595         struct ospf_redist *red;
 596
 597         red_list = ospf->redist[type];
 598         if (!red_list)
 599                 return (NULL);
 600
 601         for (ALL_LIST_ELEMENTS_RO(red_list, node, red))
 602                 if (red->instance == instance)
 603                         return red;
 604
 605         return NULL;
 606 }
 607
 608 struct ospf_redist *ospf_redist_add(struct ospf *ospf, uint8_t type,
 609                                     unsigned short instance)
 610 {
 611         struct list *red_list;
 612         struct ospf_redist *red;
 613
 614         red = ospf_redist_lookup(ospf, type, instance);
 615         if (red)
 616                 return red;
 617
 618         if (!ospf->redist[type])
 619                 ospf->redist[type] = list_new();
 620
 621         red_list = ospf->redist[type];
 622         red = (struct ospf_redist *)XCALLOC(MTYPE_OSPF_REDISTRIBUTE,
 623                                             sizeof(struct ospf_redist));
 624         red->instance = instance;
 625         red->dmetric.type = -1;
 626         red->dmetric.value = -1;
 627
 628         listnode_add(red_list, red);
 629
 630         return red;
 631 }
 632
 633 void ospf_redist_del(struct ospf *ospf, uint8_t type, unsigned short instance)
 634 {
 635         struct ospf_redist *red;
 636
 637         red = ospf_redist_lookup(ospf, type, instance);
 638
 639         if (red) {
 640                 listnode_delete(ospf->redist[type], red);
 641                 if (!ospf->redist[type]->count) {
 642                         list_delete_and_null(&ospf->redist[type]);
 643                 }
 644                 ospf_routemap_unset(red);
 645                 XFREE(MTYPE_OSPF_REDISTRIBUTE, red);
 646         }
 647 }
 648
 649
 650 int ospf_is_type_redistributed(struct ospf *ospf, int type,
 651                                unsigned short instance)
 652 {
 653         return (DEFAULT_ROUTE_TYPE(type)
 654                         ? vrf_bitmap_check(zclient->default_information,
 655                                            ospf->vrf_id)
 656                         : ((instance
 657                             && redist_check_instance(
 658                                        &zclient->mi_redist[AFI_IP][type],
 659                                        instance))
 660                            || (!instance
 661                                && vrf_bitmap_check(
 662                                           zclient->redist[AFI_IP][type],
 663                                           ospf->vrf_id))));
 664 }
 665
 666 int ospf_redistribute_set(struct ospf *ospf, int type, unsigned short instance,
 667                           int mtype, int mvalue)
 668 {
 669         int force = 0;
 670         struct ospf_redist *red;
 671
 672         red = ospf_redist_lookup(ospf, type, instance);
 673         if (ospf_is_type_redistributed(ospf, type, instance)) {
 674                 if (mtype != red->dmetric.type) {
 675                         red->dmetric.type = mtype;
 676                         force = LSA_REFRESH_FORCE;
 677                 }
 678                 if (mvalue != red->dmetric.value) {
 679                         red->dmetric.value = mvalue;
 680                         force = LSA_REFRESH_FORCE;
 681                 }
 682
 683                 ospf_external_lsa_refresh_type(ospf, type, instance, force);
 684
 685                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 686                         zlog_debug(
 687                                 "Redistribute[%s][%d]: Refresh  Type[%d], Metric[%d]",
 688                                 ospf_redist_string(type), instance,
 689                                 metric_type(ospf, type, instance),
 690                                 metric_value(ospf, type, instance));
 691
 692                 return CMD_SUCCESS;
 693         }
 694
 695         red->dmetric.type = mtype;
 696         red->dmetric.value = mvalue;
 697
 698         ospf_external_add(ospf, type, instance);
 699
 700         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type,
 701                              instance, ospf->vrf_id);
 702
 703         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 704                 zlog_debug(
 705                         "Redistribute[%s][%d] vrf id %u: Start  Type[%d], Metric[%d]",
 706                         ospf_redist_string(type), instance, ospf->vrf_id,
 707                         metric_type(ospf, type, instance),
 708                         metric_value(ospf, type, instance));
 709
 710         ospf_asbr_status_update(ospf, ++ospf->redistribute);
 711
 712         return CMD_SUCCESS;
 713 }
 714
 715 int ospf_redistribute_unset(struct ospf *ospf, int type,
 716                             unsigned short instance)
 717 {
 718         if (type == zclient->redist_default && instance == zclient->instance)
 719                 return CMD_SUCCESS;
 720
 721         if (!ospf_is_type_redistributed(ospf, type, instance))
 722                 return CMD_SUCCESS;
 723
 724         zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, AFI_IP, type,
 725                              instance, ospf->vrf_id);
 726
 727         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 728                 zlog_debug("Redistribute[%s][%d] vrf id %u: Stop",
 729                            ospf_redist_string(type), instance, ospf->vrf_id);
 730
 731         ospf_redist_del(ospf, type, instance);
 732
 733         /* Remove the routes from OSPF table. */
 734         ospf_redistribute_withdraw(ospf, type, instance);
 735
 736         ospf_external_del(ospf, type, instance);
 737
 738         ospf_asbr_status_update(ospf, --ospf->redistribute);
 739
 740         return CMD_SUCCESS;
 741 }
 742
 743 int ospf_redistribute_default_set(struct ospf *ospf, int originate, int mtype,
 744                                   int mvalue)
 745 {
 746         struct ospf_redist *red;
 747
 748         ospf->default_originate = originate;
 749
 750         red = ospf_redist_add(ospf, DEFAULT_ROUTE, 0);
 751         red->dmetric.type = mtype;
 752         red->dmetric.value = mvalue;
 753
 754         ospf_external_add(ospf, DEFAULT_ROUTE, 0);
 755
 756         if (ospf_is_type_redistributed(ospf, DEFAULT_ROUTE, 0)) {
 757                 /* if ospf->default_originate changes value, is calling
 758                    ospf_external_lsa_refresh_default sufficient to implement
 759                    the change? */
 760                 ospf_external_lsa_refresh_default(ospf);
 761
 762                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 763                         zlog_debug(
 764                                 "Redistribute[%s]: Refresh  Type[%d], Metric[%d]",
 765                                 ospf_redist_string(DEFAULT_ROUTE),
 766                                 metric_type(ospf, DEFAULT_ROUTE, 0),
 767                                 metric_value(ospf, DEFAULT_ROUTE, 0));
 768                 return CMD_SUCCESS;
 769         }
 770
 771         zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD, zclient,
 772                                      ospf->vrf_id);
 773
 774         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 775                 zlog_debug("Redistribute[DEFAULT]: Start  Type[%d], Metric[%d]",
 776                            metric_type(ospf, DEFAULT_ROUTE, 0),
 777                            metric_value(ospf, DEFAULT_ROUTE, 0));
 778
 779         if (ospf->router_id.s_addr == 0)
 780                 ospf->external_origin |= (1 << DEFAULT_ROUTE);
 781         else
 782                 thread_add_timer(master, ospf_default_originate_timer, ospf, 1,
 783                                  NULL);
 784
 785         ospf_asbr_status_update(ospf, ++ospf->redistribute);
 786
 787         return CMD_SUCCESS;
 788 }
 789
 790 int ospf_redistribute_default_unset(struct ospf *ospf)
 791 {
 792         if (!ospf_is_type_redistributed(ospf, DEFAULT_ROUTE, 0))
 793                 return CMD_SUCCESS;
 794
 795         ospf->default_originate = DEFAULT_ORIGINATE_NONE;
 796         ospf_redist_del(ospf, DEFAULT_ROUTE, 0);
 797
 798         zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE, zclient,
 799                                      ospf->vrf_id);
 800
 801         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 802                 zlog_debug("Redistribute[DEFAULT]: Stop");
 803
 804         // Pending: how does the external_info cleanup work in this case?
 805
 806         ospf_asbr_status_update(ospf, --ospf->redistribute);
 807
 808         return CMD_SUCCESS;
 809 }
 810
 811 static int ospf_external_lsa_originate_check(struct ospf *ospf,
 812                                              struct external_info *ei)
 813 {
 814         /* If prefix is multicast, then do not originate LSA. */
 815         if (IN_MULTICAST(htonl(ei->p.prefix.s_addr))) {
 816                 zlog_info(
 817                         "LSA[Type5:%s]: Not originate AS-external-LSA, "
 818                         "Prefix belongs multicast",
 819                         inet_ntoa(ei->p.prefix));
 820                 return 0;
 821         }
 822
 823         /* Take care of default-originate. */
 824         if (is_prefix_default(&ei->p))
 825                 if (ospf->default_originate == DEFAULT_ORIGINATE_NONE) {
 826                         zlog_info(
 827                                 "LSA[Type5:0.0.0.0]: Not originate AS-external-LSA "
 828                                 "for default");
 829                         return 0;
 830                 }
 831
 832         return 1;
 833 }
 834
 835 /* If connected prefix is OSPF enable interface, then do not announce. */
 836 int ospf_distribute_check_connected(struct ospf *ospf, struct external_info *ei)
 837 {
 838         struct listnode *node;
 839         struct ospf_interface *oi;
 840
 841
 842         for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi))
 843                 if (prefix_match(oi->address, (struct prefix *)&ei->p))
 844                         return 0;
 845         return 1;
 846 }
 847
 848 /* return 1 if external LSA must be originated, 0 otherwise */
 849 int ospf_redistribute_check(struct ospf *ospf, struct external_info *ei,
 850                             int *changed)
 851 {
 852         struct route_map_set_values save_values;
 853         struct prefix_ipv4 *p = &ei->p;
 854         struct ospf_redist *red;
 855         uint8_t type = is_prefix_default(&ei->p) ? DEFAULT_ROUTE : ei->type;
 856         unsigned short instance = is_prefix_default(&ei->p) ? 0 : ei->instance;
 857
 858         if (changed)
 859                 *changed = 0;
 860
 861         if (!ospf_external_lsa_originate_check(ospf, ei))
 862                 return 0;
 863
 864         /* Take care connected route. */
 865         if (type == ZEBRA_ROUTE_CONNECT
 866             && !ospf_distribute_check_connected(ospf, ei))
 867                 return 0;
 868
 869         if (!DEFAULT_ROUTE_TYPE(type) && DISTRIBUTE_NAME(ospf, type))
 870                 /* distirbute-list exists, but access-list may not? */
 871                 if (DISTRIBUTE_LIST(ospf, type))
 872                         if (access_list_apply(DISTRIBUTE_LIST(ospf, type), p)
 873                             == FILTER_DENY) {
 874                                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 875                                         char buf[PREFIX2STR_BUFFER];
 876                                         zlog_debug(
 877                                                 "Redistribute[%s]: %s filtered by distribute-list.",
 878                                                 ospf_redist_string(type),
 879                                                 prefix2str(p, buf, sizeof(buf)));
 880                                 }
 881                                 return 0;
 882                         }
 883
 884         save_values = ei->route_map_set;
 885         ospf_reset_route_map_set_values(&ei->route_map_set);
 886
 887         /* apply route-map if needed */
 888         red = ospf_redist_lookup(ospf, type, instance);
 889         if (red && ROUTEMAP_NAME(red)) {
 890                 int ret;
 891
 892                 ret = route_map_apply(ROUTEMAP(red), (struct prefix *)p,
 893                                       RMAP_OSPF, ei);
 894
 895                 if (ret == RMAP_DENYMATCH) {
 896                         ei->route_map_set = save_values;
 897                         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 898                                 char buf[PREFIX2STR_BUFFER];
 899                                 zlog_debug(
 900                                         "Redistribute[%s]: %s filtered by route-map.",
 901                                         ospf_redist_string(type),
 902                                         prefix2str(p, buf, sizeof(buf)));
 903                         }
 904                         return 0;
 905                 }
 906
 907                 /* check if 'route-map set' changed something */
 908                 if (changed)
 909                         *changed = !ospf_route_map_set_compare(
 910                                 &ei->route_map_set, &save_values);
 911         }
 912
 913         return 1;
 914 }
 915
 916 /* OSPF route-map set for redistribution */
 917 void ospf_routemap_set(struct ospf_redist *red, const char *name)
 918 {
 919         if (ROUTEMAP_NAME(red))
 920                 free(ROUTEMAP_NAME(red));
 921
 922         ROUTEMAP_NAME(red) = strdup(name);
 923         ROUTEMAP(red) = route_map_lookup_by_name(name);
 924 }
 925
 926 void ospf_routemap_unset(struct ospf_redist *red)
 927 {
 928         if (ROUTEMAP_NAME(red))
 929                 free(ROUTEMAP_NAME(red));
 930
 931         ROUTEMAP_NAME(red) = NULL;
 932         ROUTEMAP(red) = NULL;
 933 }
 934
 935 /* Zebra route add and delete treatment. */
 936 static int ospf_zebra_read_route(int command, struct zclient *zclient,
 937                                  zebra_size_t length, vrf_id_t vrf_id)
 938 {
 939         struct zapi_route api;
 940         struct prefix_ipv4 p;
 941         unsigned long ifindex;
 942         struct in_addr nexthop;
 943         struct external_info *ei;
 944         struct ospf *ospf;
 945         int i;
 946
 947         ospf = ospf_lookup_by_vrf_id(vrf_id);
 948         if (ospf == NULL)
 949                 return 0;
 950
 951         if (zapi_route_decode(zclient->ibuf, &api) < 0)
 952                 return -1;
 953
 954         ifindex = api.nexthops[0].ifindex;
 955         nexthop = api.nexthops[0].gate.ipv4;
 956
 957         memcpy(&p, &api.prefix, sizeof(p));
 958         if (IPV4_NET127(ntohl(p.prefix.s_addr)))
 959                 return 0;
 960
 961         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 962                 char buf_prefix[PREFIX_STRLEN];
 963                 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
 964
 965                 zlog_debug("%s: from client %s: vrf_id %d, p %s", __func__,
 966                            zebra_route_string(api.type), vrf_id, buf_prefix);
 967         }
 968
 969         if (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD) {
 970                 /* XXX|HACK|TODO|FIXME:
 971                  * Maybe we should ignore reject/blackhole routes? Testing
 972                  * shows that there is no problems though and this is only way
 973                  * to "summarize" routes in ASBR at the moment. Maybe we need
 974                  * just a better generalised solution for these types?
 975                  */
 976
 977                 /* Protocol tag overwrites all other tag value sent by zebra */
 978                 if (ospf->dtag[api.type] > 0)
 979                         api.tag = ospf->dtag[api.type];
 980
 981                 /*
 982                  * Given zebra sends update for a prefix via ADD message, it
 983                  * should
 984                  * be considered as an implicit DEL for that prefix with other
 985                  * source
 986                  * types.
 987                  */
 988                 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
 989                         if (i != api.type)
 990                                 ospf_external_info_delete(ospf, i, api.instance,
 991                                                           p);
 992
 993                 ei = ospf_external_info_add(ospf, api.type, api.instance, p,
 994                                             ifindex, nexthop, api.tag);
 995                 if (ei == NULL) {
 996                         /* Nothing has changed, so nothing to do; return */
 997                         return 0;
 998                 }
 999                 if (ospf->router_id.s_addr == 0)
1000                         /* Set flags to generate AS-external-LSA originate event
1001                            for each redistributed protocols later. */
1002                         ospf->external_origin |= (1 << api.type);
1003                 else {
1004                         if (ei) {
1005                                 if (is_prefix_default(&p))
1006                                         ospf_external_lsa_refresh_default(ospf);
1007                                 else {
1008                                         struct ospf_lsa *current;
1009
1010                                         current = ospf_external_info_find_lsa(
1011                                                 ospf, &ei->p);
1012                                         if (!current)
1013                                                 ospf_external_lsa_originate(
1014                                                         ospf, ei);
1015                                         else {
1016                                                 if (IS_DEBUG_OSPF(
1017                                                             zebra,
1018                                                             ZEBRA_REDISTRIBUTE))
1019                                                         zlog_debug(
1020                                                                 "ospf_zebra_read_route() : %s refreshing LSA",
1021                                                                 inet_ntoa(
1022                                                                         p.prefix));
1023                                                 ospf_external_lsa_refresh(
1024                                                         ospf, current, ei,
1025                                                         LSA_REFRESH_FORCE);
1026                                         }
1027                                 }
1028                         }
1029                 }
1030         } else /* if (command == ZEBRA_REDISTRIBUTE_ROUTE_DEL) */
1031         {
1032                 ospf_external_info_delete(ospf, api.type, api.instance, p);
1033                 if (is_prefix_default(&p))
1034                         ospf_external_lsa_refresh_default(ospf);
1035                 else
1036                         ospf_external_lsa_flush(ospf, api.type, &p,
1037                                                 ifindex /*, nexthop */);
1038         }
1039
1040         return 0;
1041 }
1042
1043
1044 int ospf_distribute_list_out_set(struct ospf *ospf, int type, const char *name)
1045 {
1046         /* Lookup access-list for distribute-list. */
1047         DISTRIBUTE_LIST(ospf, type) = access_list_lookup(AFI_IP, name);
1048
1049         /* Clear previous distribute-name. */
1050         if (DISTRIBUTE_NAME(ospf, type))
1051                 free(DISTRIBUTE_NAME(ospf, type));
1052
1053         /* Set distribute-name. */
1054         DISTRIBUTE_NAME(ospf, type) = strdup(name);
1055
1056         /* If access-list have been set, schedule update timer. */
1057         if (DISTRIBUTE_LIST(ospf, type))
1058                 ospf_distribute_list_update(ospf, type, 0);
1059
1060         return CMD_SUCCESS;
1061 }
1062
1063 int ospf_distribute_list_out_unset(struct ospf *ospf, int type,
1064                                    const char *name)
1065 {
1066         /* Schedule update timer. */
1067         if (DISTRIBUTE_LIST(ospf, type))
1068                 ospf_distribute_list_update(ospf, type, 0);
1069
1070         /* Unset distribute-list. */
1071         DISTRIBUTE_LIST(ospf, type) = NULL;
1072
1073         /* Clear distribute-name. */
1074         if (DISTRIBUTE_NAME(ospf, type))
1075                 free(DISTRIBUTE_NAME(ospf, type));
1076
1077         DISTRIBUTE_NAME(ospf, type) = NULL;
1078
1079         return CMD_SUCCESS;
1080 }
1081
1082 /* distribute-list update timer. */
1083 static int ospf_distribute_list_update_timer(struct thread *thread)
1084 {
1085         struct route_node *rn;
1086         struct external_info *ei;
1087         struct route_table *rt;
1088         struct ospf_lsa *lsa;
1089         int type, default_refresh = 0, arg_type;
1090         struct ospf *ospf = NULL;
1091         void **arg = THREAD_ARG(thread);
1092
1093         ospf = (struct ospf *)arg[0];
1094         arg_type = (int)(intptr_t)arg[1];
1095
1096         if (ospf == NULL)
1097                 return 0;
1098
1099         ospf->t_distribute_update = NULL;
1100
1101         zlog_info("Zebra[Redistribute]: distribute-list update timer fired!");
1102
1103         if (IS_DEBUG_OSPF_EVENT) {
1104                 zlog_debug(
1105                         "%s: ospf distribute-list update arg_type %d vrf %s id %d",
1106                         __PRETTY_FUNCTION__, arg_type,
1107                         ospf_vrf_id_to_name(ospf->vrf_id), ospf->vrf_id);
1108         }
1109
1110         /* foreach all external info. */
1111         for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
1112                 struct list *ext_list;
1113                 struct listnode *node;
1114                 struct ospf_external *ext;
1115
1116                 ext_list = ospf->external[type];
1117                 if (!ext_list)
1118                         continue;
1119
1120                 for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) {
1121                         rt = ext->external_info;
1122                         if (!rt)
1123                                 continue;
1124                         for (rn = route_top(rt); rn; rn = route_next(rn))
1125                                 if ((ei = rn->info) != NULL) {
1126                                         if (is_prefix_default(&ei->p))
1127                                                 default_refresh = 1;
1128                                         else if (
1129                                                 (lsa = ospf_external_info_find_lsa(
1130                                                          ospf, &ei->p)))
1131                                                 ospf_external_lsa_refresh(
1132                                                         ospf, lsa, ei,
1133                                                         LSA_REFRESH_IF_CHANGED);
1134                                         else
1135                                                 ospf_external_lsa_originate(
1136                                                         ospf, ei);
1137                                 }
1138                 }
1139         }
1140         if (default_refresh)
1141                 ospf_external_lsa_refresh_default(ospf);
1142
1143         XFREE(MTYPE_OSPF_DIST_ARGS, arg);
1144         return 0;
1145 }
1146
1147 /* Update distribute-list and set timer to apply access-list. */
1148 void ospf_distribute_list_update(struct ospf *ospf, int type,
1149                                  unsigned short instance)
1150 {
1151         struct route_table *rt;
1152         struct ospf_external *ext;
1153         void **args = XCALLOC(MTYPE_OSPF_DIST_ARGS, sizeof(void *) * 2);
1154
1155         args[0] = ospf;
1156         args[1] = (void *)((ptrdiff_t)type);
1157
1158         /* External info does not exist. */
1159         ext = ospf_external_lookup(ospf, type, instance);
1160         if (!ext || !(rt = EXTERNAL_INFO(ext))) {
1161                 XFREE(MTYPE_OSPF_DIST_ARGS, args);
1162                 return;
1163         }
1164
1165         /* If exists previously invoked thread, then let it continue. */
1166         if (ospf->t_distribute_update) {
1167                 XFREE(MTYPE_OSPF_DIST_ARGS, args);
1168                 return;
1169         }
1170
1171         /* Set timer. */
1172         ospf->t_distribute_update = NULL;
1173         thread_add_timer_msec(master, ospf_distribute_list_update_timer,
1174                               (void **)args, ospf->min_ls_interval,
1175                               &ospf->t_distribute_update);
1176 }
1177
1178 /* If access-list is updated, apply some check. */
1179 static void ospf_filter_update(struct access_list *access)
1180 {
1181         struct ospf *ospf;
1182         int type;
1183         int abr_inv = 0;
1184         struct ospf_area *area;
1185         struct listnode *node, *n1;
1186
1187         /* If OSPF instance does not exist, return right now. */
1188         if (listcount(om->ospf) == 0)
1189                 return;
1190
1191         /* Iterate all ospf [VRF] instances */
1192         for (ALL_LIST_ELEMENTS_RO(om->ospf, n1, ospf)) {
1193                 /* Update distribute-list, and apply filter. */
1194                 for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
1195                         struct list *red_list;
1196                         struct listnode *node;
1197                         struct ospf_redist *red;
1198
1199                         red_list = ospf->redist[type];
1200                         if (red_list)
1201                                 for (ALL_LIST_ELEMENTS_RO(red_list, node,
1202                                                           red)) {
1203                                         if (ROUTEMAP(red)) {
1204                                                 /* if route-map is not NULL it
1205                                                  * may be
1206                                                  * using this access list */
1207                                                 ospf_distribute_list_update(
1208                                                         ospf, type,
1209                                                         red->instance);
1210                                         }
1211                                 }
1212
1213                         /* There is place for route-map for default-information
1214                          * (ZEBRA_ROUTE_MAX),
1215                          * but no distribute list. */
1216                         if (type == ZEBRA_ROUTE_MAX)
1217                                 break;
1218
1219                         if (DISTRIBUTE_NAME(ospf, type)) {
1220                                 /* Keep old access-list for distribute-list. */
1221                                 struct access_list *old =
1222                                         DISTRIBUTE_LIST(ospf, type);
1223
1224                                 /* Update access-list for distribute-list. */
1225                                 DISTRIBUTE_LIST(ospf, type) =
1226                                         access_list_lookup(
1227                                                 AFI_IP,
1228                                                 DISTRIBUTE_NAME(ospf, type));
1229
1230                                 /* No update for this distribute type. */
1231                                 if (old == NULL
1232                                     && DISTRIBUTE_LIST(ospf, type) == NULL)
1233                                         continue;
1234
1235                                 /* Schedule distribute-list update timer. */
1236                                 if (DISTRIBUTE_LIST(ospf, type) == NULL
1237                                     || strcmp(DISTRIBUTE_NAME(ospf, type),
1238                                               access->name)
1239                                                == 0)
1240                                         ospf_distribute_list_update(ospf, type,
1241                                                                     0);
1242                         }
1243                 }
1244
1245                 /* Update Area access-list. */
1246                 for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) {
1247                         if (EXPORT_NAME(area)) {
1248                                 EXPORT_LIST(area) = NULL;
1249                                 abr_inv++;
1250                         }
1251
1252                         if (IMPORT_NAME(area)) {
1253                                 IMPORT_LIST(area) = NULL;
1254                                 abr_inv++;
1255                         }
1256                 }
1257
1258                 /* Schedule ABR tasks -- this will be changed -- takada. */
1259                 if (IS_OSPF_ABR(ospf) && abr_inv)
1260                         ospf_schedule_abr_task(ospf);
1261         }
1262 }
1263
1264 /* If prefix-list is updated, do some updates. */
1265 void ospf_prefix_list_update(struct prefix_list *plist)
1266 {
1267         struct ospf *ospf = NULL;
1268         int type;
1269         int abr_inv = 0;
1270         struct ospf_area *area;
1271         struct listnode *node, *n1;
1272
1273         /* If OSPF instatnce does not exist, return right now. */
1274         if (listcount(om->ospf) == 0)
1275                 return;
1276
1277         /* Iterate all ospf [VRF] instances */
1278         for (ALL_LIST_ELEMENTS_RO(om->ospf, n1, ospf)) {
1279
1280                 /* Update all route-maps which are used
1281                  * as redistribution filters.
1282                  * They might use prefix-list.
1283                  */
1284                 for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
1285                         struct list *red_list;
1286                         struct listnode *node;
1287                         struct ospf_redist *red;
1288
1289                         red_list = ospf->redist[type];
1290                         if (red_list) {
1291                                 for (ALL_LIST_ELEMENTS_RO(red_list, node,
1292                                                           red)) {
1293                                         if (ROUTEMAP(red)) {
1294                                                 /* if route-map is not NULL
1295                                                  * it may be using
1296                                                  * this prefix list */
1297                                                 ospf_distribute_list_update(
1298                                                         ospf, type,
1299                                                         red->instance);
1300                                         }
1301                                 }
1302                         }
1303                 }
1304
1305                 /* Update area filter-lists. */
1306                 for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) {
1307                         /* Update filter-list in. */
1308                         if (PREFIX_NAME_IN(area))
1309                                 if (strcmp(PREFIX_NAME_IN(area),
1310                                            prefix_list_name(plist))
1311                                     == 0) {
1312                                         PREFIX_LIST_IN(area) =
1313                                                 prefix_list_lookup(
1314                                                         AFI_IP,
1315                                                         PREFIX_NAME_IN(area));
1316                                         abr_inv++;
1317                                 }
1318
1319                         /* Update filter-list out. */
1320                         if (PREFIX_NAME_OUT(area))
1321                                 if (strcmp(PREFIX_NAME_OUT(area),
1322                                            prefix_list_name(plist))
1323                                     == 0) {
1324                                         PREFIX_LIST_IN(area) =
1325                                                 prefix_list_lookup(
1326                                                         AFI_IP,
1327                                                         PREFIX_NAME_OUT(area));
1328                                         abr_inv++;
1329                                 }
1330                 }
1331
1332                 /* Schedule ABR task. */
1333                 if (IS_OSPF_ABR(ospf) && abr_inv)
1334                         ospf_schedule_abr_task(ospf);
1335         }
1336 }
1337
1338 static struct ospf_distance *ospf_distance_new(void)
1339 {
1340         return XCALLOC(MTYPE_OSPF_DISTANCE, sizeof(struct ospf_distance));
1341 }
1342
1343 static void ospf_distance_free(struct ospf_distance *odistance)
1344 {
1345         XFREE(MTYPE_OSPF_DISTANCE, odistance);
1346 }
1347
1348 int ospf_distance_set(struct vty *vty, struct ospf *ospf,
1349                       const char *distance_str, const char *ip_str,
1350                       const char *access_list_str)
1351 {
1352         int ret;
1353         struct prefix_ipv4 p;
1354         uint8_t distance;
1355         struct route_node *rn;
1356         struct ospf_distance *odistance;
1357
1358         ret = str2prefix_ipv4(ip_str, &p);
1359         if (ret == 0) {
1360                 vty_out(vty, "Malformed prefix\n");
1361                 return CMD_WARNING_CONFIG_FAILED;
1362         }
1363
1364         distance = atoi(distance_str);
1365
1366         /* Get OSPF distance node. */
1367         rn = route_node_get(ospf->distance_table, (struct prefix *)&p);
1368         if (rn->info) {
1369                 odistance = rn->info;
1370                 route_unlock_node(rn);
1371         } else {
1372                 odistance = ospf_distance_new();
1373                 rn->info = odistance;
1374         }
1375
1376         /* Set distance value. */
1377         odistance->distance = distance;
1378
1379         /* Reset access-list configuration. */
1380         if (odistance->access_list) {
1381                 free(odistance->access_list);
1382                 odistance->access_list = NULL;
1383         }
1384         if (access_list_str)
1385                 odistance->access_list = strdup(access_list_str);
1386
1387         return CMD_SUCCESS;
1388 }
1389
1390 int ospf_distance_unset(struct vty *vty, struct ospf *ospf,
1391                         const char *distance_str, const char *ip_str,
1392                         char const *access_list_str)
1393 {
1394         int ret;
1395         struct prefix_ipv4 p;
1396         struct route_node *rn;
1397         struct ospf_distance *odistance;
1398
1399         ret = str2prefix_ipv4(ip_str, &p);
1400         if (ret == 0) {
1401                 vty_out(vty, "Malformed prefix\n");
1402                 return CMD_WARNING_CONFIG_FAILED;
1403         }
1404
1405         rn = route_node_lookup(ospf->distance_table, (struct prefix *)&p);
1406         if (!rn) {
1407                 vty_out(vty, "Can't find specified prefix\n");
1408                 return CMD_WARNING_CONFIG_FAILED;
1409         }
1410
1411         odistance = rn->info;
1412
1413         if (odistance->access_list)
1414                 free(odistance->access_list);
1415         ospf_distance_free(odistance);
1416
1417         rn->info = NULL;
1418         route_unlock_node(rn);
1419         route_unlock_node(rn);
1420
1421         return CMD_SUCCESS;
1422 }
1423
1424 void ospf_distance_reset(struct ospf *ospf)
1425 {
1426         struct route_node *rn;
1427         struct ospf_distance *odistance;
1428
1429         for (rn = route_top(ospf->distance_table); rn; rn = route_next(rn))
1430                 if ((odistance = rn->info) != NULL) {
1431                         if (odistance->access_list)
1432                                 free(odistance->access_list);
1433                         ospf_distance_free(odistance);
1434                         rn->info = NULL;
1435                         route_unlock_node(rn);
1436                 }
1437 }
1438
1439 uint8_t ospf_distance_apply(struct ospf *ospf, struct prefix_ipv4 *p,
1440                             struct ospf_route * or)
1441 {
1442
1443         if (ospf == NULL)
1444                 return 0;
1445
1446         if (ospf->distance_intra)
1447                 if (or->path_type == OSPF_PATH_INTRA_AREA)
1448                         return ospf->distance_intra;
1449
1450         if (ospf->distance_inter)
1451                 if (or->path_type == OSPF_PATH_INTER_AREA)
1452                         return ospf->distance_inter;
1453
1454         if (ospf->distance_external)
1455                 if (or->path_type == OSPF_PATH_TYPE1_EXTERNAL ||
1456                     or->path_type == OSPF_PATH_TYPE2_EXTERNAL)
1457                         return ospf->distance_external;
1458
1459         if (ospf->distance_all)
1460                 return ospf->distance_all;
1461
1462         return 0;
1463 }
1464
1465 void ospf_zebra_vrf_register(struct ospf *ospf)
1466 {
1467         if (!zclient || zclient->sock < 0 || !ospf)
1468                 return;
1469
1470         if (ospf->vrf_id != VRF_UNKNOWN) {
1471                 if (IS_DEBUG_OSPF_EVENT)
1472                         zlog_debug("%s: Register VRF %s id %u",
1473                                    __PRETTY_FUNCTION__,
1474                                    ospf_vrf_id_to_name(ospf->vrf_id),
1475                                    ospf->vrf_id);
1476                 zclient_send_reg_requests(zclient, ospf->vrf_id);
1477         }
1478 }
1479
1480 void ospf_zebra_vrf_deregister(struct ospf *ospf)
1481 {
1482         if (!zclient || zclient->sock < 0 || !ospf)
1483                 return;
1484
1485         if (ospf->vrf_id != VRF_DEFAULT && ospf->vrf_id != VRF_UNKNOWN) {
1486                 if (IS_DEBUG_OSPF_EVENT)
1487                         zlog_debug("%s: De-Register VRF %s id %u to Zebra.",
1488                                    __PRETTY_FUNCTION__,
1489                                    ospf_vrf_id_to_name(ospf->vrf_id),
1490                                    ospf->vrf_id);
1491                 /* Deregister for router-id, interfaces,
1492                  * redistributed routes. */
1493                 zclient_send_dereg_requests(zclient, ospf->vrf_id);
1494         }
1495 }
1496 static void ospf_zebra_connected(struct zclient *zclient)
1497 {
1498         /* Send the client registration */
1499         bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER);
1500
1501         zclient_send_reg_requests(zclient, VRF_DEFAULT);
1502 }
1503
1504 void ospf_zebra_init(struct thread_master *master, unsigned short instance)
1505 {
1506         /* Allocate zebra structure. */
1507         zclient = zclient_new_notify(master, &zclient_options_default);
1508         zclient_init(zclient, ZEBRA_ROUTE_OSPF, instance, &ospfd_privs);
1509         zclient->zebra_connected = ospf_zebra_connected;
1510         zclient->router_id_update = ospf_router_id_update_zebra;
1511         zclient->interface_add = ospf_interface_add;
1512         zclient->interface_delete = ospf_interface_delete;
1513         zclient->interface_up = ospf_interface_state_up;
1514         zclient->interface_down = ospf_interface_state_down;
1515         zclient->interface_address_add = ospf_interface_address_add;
1516         zclient->interface_address_delete = ospf_interface_address_delete;
1517         zclient->interface_link_params = ospf_interface_link_params;
1518         zclient->interface_vrf_update = ospf_interface_vrf_update;
1519
1520         zclient->redistribute_route_add = ospf_zebra_read_route;
1521         zclient->redistribute_route_del = ospf_zebra_read_route;
1522
1523         access_list_add_hook(ospf_filter_update);
1524         access_list_delete_hook(ospf_filter_update);
1525         prefix_list_add_hook(ospf_prefix_list_update);
1526         prefix_list_delete_hook(ospf_prefix_list_update);
1527 }