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