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][INET_ADDRSTRLEN];
 452                         zlog_debug(
 453                                 "Zebra: Route add %s/%d nexthop %s, ifindex=%d",
 454                                 inet_ntop(AF_INET, &p->prefix, buf[0],
 455                                           sizeof(buf[0])),
 456                                 p->prefixlen, 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[INET_ADDRSTRLEN];
 480                 zlog_debug("Zebra: Route delete %s/%d",
 481                            inet_ntop(AF_INET, &p->prefix, buf, sizeof(buf[0])),
 482                            p->prefixlen);
 483         }
 484
 485         zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 486 }
 487
 488 void ospf_zebra_add_discard(struct ospf *ospf, struct prefix_ipv4 *p)
 489 {
 490         struct zapi_route api;
 491
 492         memset(&api, 0, sizeof(api));
 493         api.vrf_id = ospf->vrf_id;
 494         api.type = ZEBRA_ROUTE_OSPF;
 495         api.instance = ospf->instance;
 496         api.safi = SAFI_UNICAST;
 497         memcpy(&api.prefix, p, sizeof(*p));
 498         zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
 499
 500         zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
 501
 502         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 503                 zlog_debug("Zebra: Route add discard %s/%d",
 504                            inet_ntoa(p->prefix), p->prefixlen);
 505 }
 506
 507 void ospf_zebra_delete_discard(struct ospf *ospf, struct prefix_ipv4 *p)
 508 {
 509         struct zapi_route api;
 510
 511         memset(&api, 0, sizeof(api));
 512         api.vrf_id = ospf->vrf_id;
 513         api.type = ZEBRA_ROUTE_OSPF;
 514         api.instance = ospf->instance;
 515         api.safi = SAFI_UNICAST;
 516         memcpy(&api.prefix, p, sizeof(*p));
 517         zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
 518
 519         zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 520
 521         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 522                 zlog_debug("Zebra: Route delete discard %s/%d",
 523                            inet_ntoa(p->prefix), p->prefixlen);
 524 }
 525
 526 struct ospf_external *ospf_external_lookup(struct ospf *ospf, uint8_t type,
 527                                            unsigned short instance)
 528 {
 529         struct list *ext_list;
 530         struct listnode *node;
 531         struct ospf_external *ext;
 532
 533         ext_list = ospf->external[type];
 534         if (!ext_list)
 535                 return (NULL);
 536
 537         for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext))
 538                 if (ext->instance == instance)
 539                         return ext;
 540
 541         return NULL;
 542 }
 543
 544 struct ospf_external *ospf_external_add(struct ospf *ospf, uint8_t type,
 545                                         unsigned short instance)
 546 {
 547         struct list *ext_list;
 548         struct ospf_external *ext;
 549
 550         ext = ospf_external_lookup(ospf, type, instance);
 551         if (ext)
 552                 return ext;
 553
 554         if (!ospf->external[type])
 555                 ospf->external[type] = list_new();
 556
 557         ext_list = ospf->external[type];
 558         ext = (struct ospf_external *)XCALLOC(MTYPE_OSPF_EXTERNAL,
 559                                               sizeof(struct ospf_external));
 560         ext->instance = instance;
 561         EXTERNAL_INFO(ext) = route_table_init();
 562
 563         listnode_add(ext_list, ext);
 564
 565         return ext;
 566 }
 567
 568 void ospf_external_del(struct ospf *ospf, uint8_t type, unsigned short instance)
 569 {
 570         struct ospf_external *ext;
 571
 572         ext = ospf_external_lookup(ospf, type, instance);
 573
 574         if (ext) {
 575                 if (EXTERNAL_INFO(ext))
 576                         route_table_finish(EXTERNAL_INFO(ext));
 577
 578                 listnode_delete(ospf->external[type], ext);
 579
 580                 if (!ospf->external[type]->count)
 581                         list_delete_and_null(&ospf->external[type]);
 582
 583                 XFREE(MTYPE_OSPF_EXTERNAL, ext);
 584         }
 585 }
 586
 587 struct ospf_redist *ospf_redist_lookup(struct ospf *ospf, uint8_t type,
 588                                        unsigned short instance)
 589 {
 590         struct list *red_list;
 591         struct listnode *node;
 592         struct ospf_redist *red;
 593
 594         red_list = ospf->redist[type];
 595         if (!red_list)
 596                 return (NULL);
 597
 598         for (ALL_LIST_ELEMENTS_RO(red_list, node, red))
 599                 if (red->instance == instance)
 600                         return red;
 601
 602         return NULL;
 603 }
 604
 605 struct ospf_redist *ospf_redist_add(struct ospf *ospf, uint8_t type,
 606                                     unsigned short instance)
 607 {
 608         struct list *red_list;
 609         struct ospf_redist *red;
 610
 611         red = ospf_redist_lookup(ospf, type, instance);
 612         if (red)
 613                 return red;
 614
 615         if (!ospf->redist[type])
 616                 ospf->redist[type] = list_new();
 617
 618         red_list = ospf->redist[type];
 619         red = (struct ospf_redist *)XCALLOC(MTYPE_OSPF_REDISTRIBUTE,
 620                                             sizeof(struct ospf_redist));
 621         red->instance = instance;
 622         red->dmetric.type = -1;
 623         red->dmetric.value = -1;
 624
 625         listnode_add(red_list, red);
 626
 627         return red;
 628 }
 629
 630 void ospf_redist_del(struct ospf *ospf, uint8_t type, unsigned short instance)
 631 {
 632         struct ospf_redist *red;
 633
 634         red = ospf_redist_lookup(ospf, type, instance);
 635
 636         if (red) {
 637                 listnode_delete(ospf->redist[type], red);
 638                 if (!ospf->redist[type]->count) {
 639                         list_delete_and_null(&ospf->redist[type]);
 640                 }
 641                 ospf_routemap_unset(red);
 642                 XFREE(MTYPE_OSPF_REDISTRIBUTE, red);
 643         }
 644 }
 645
 646
 647 int ospf_is_type_redistributed(struct ospf *ospf, int type,
 648                                unsigned short instance)
 649 {
 650         return (DEFAULT_ROUTE_TYPE(type)
 651                         ? vrf_bitmap_check(zclient->default_information,
 652                                            ospf->vrf_id)
 653                         : ((instance
 654                             && redist_check_instance(
 655                                        &zclient->mi_redist[AFI_IP][type],
 656                                        instance))
 657                            || (!instance
 658                                && vrf_bitmap_check(
 659                                           zclient->redist[AFI_IP][type],
 660                                           ospf->vrf_id))));
 661 }
 662
 663 int ospf_redistribute_set(struct ospf *ospf, int type, unsigned short instance,
 664                           int mtype, int mvalue)
 665 {
 666         int force = 0;
 667         struct ospf_redist *red;
 668
 669         red = ospf_redist_lookup(ospf, type, instance);
 670         if (ospf_is_type_redistributed(ospf, type, instance)) {
 671                 if (mtype != red->dmetric.type) {
 672                         red->dmetric.type = mtype;
 673                         force = LSA_REFRESH_FORCE;
 674                 }
 675                 if (mvalue != red->dmetric.value) {
 676                         red->dmetric.value = mvalue;
 677                         force = LSA_REFRESH_FORCE;
 678                 }
 679
 680                 ospf_external_lsa_refresh_type(ospf, type, instance, force);
 681
 682                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 683                         zlog_debug(
 684                                 "Redistribute[%s][%d]: Refresh  Type[%d], Metric[%d]",
 685                                 ospf_redist_string(type), instance,
 686                                 metric_type(ospf, type, instance),
 687                                 metric_value(ospf, type, instance));
 688
 689                 return CMD_SUCCESS;
 690         }
 691
 692         red->dmetric.type = mtype;
 693         red->dmetric.value = mvalue;
 694
 695         ospf_external_add(ospf, type, instance);
 696
 697         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type,
 698                              instance, ospf->vrf_id);
 699
 700         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 701                 zlog_debug(
 702                         "Redistribute[%s][%d] vrf id %u: Start  Type[%d], Metric[%d]",
 703                         ospf_redist_string(type), instance, ospf->vrf_id,
 704                         metric_type(ospf, type, instance),
 705                         metric_value(ospf, type, instance));
 706
 707         ospf_asbr_status_update(ospf, ++ospf->redistribute);
 708
 709         return CMD_SUCCESS;
 710 }
 711
 712 int ospf_redistribute_unset(struct ospf *ospf, int type,
 713                             unsigned short instance)
 714 {
 715         if (type == zclient->redist_default && instance == zclient->instance)
 716                 return CMD_SUCCESS;
 717
 718         if (!ospf_is_type_redistributed(ospf, type, instance))
 719                 return CMD_SUCCESS;
 720
 721         zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, AFI_IP, type,
 722                              instance, ospf->vrf_id);
 723
 724         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 725                 zlog_debug("Redistribute[%s][%d] vrf id %u: Stop",
 726                            ospf_redist_string(type), instance, ospf->vrf_id);
 727
 728         ospf_redist_del(ospf, type, instance);
 729
 730         /* Remove the routes from OSPF table. */
 731         ospf_redistribute_withdraw(ospf, type, instance);
 732
 733         ospf_external_del(ospf, type, instance);
 734
 735         ospf_asbr_status_update(ospf, --ospf->redistribute);
 736
 737         return CMD_SUCCESS;
 738 }
 739
 740 int ospf_redistribute_default_set(struct ospf *ospf, int originate, int mtype,
 741                                   int mvalue)
 742 {
 743         struct ospf_redist *red;
 744
 745         ospf->default_originate = originate;
 746
 747         red = ospf_redist_add(ospf, DEFAULT_ROUTE, 0);
 748         red->dmetric.type = mtype;
 749         red->dmetric.value = mvalue;
 750
 751         ospf_external_add(ospf, DEFAULT_ROUTE, 0);
 752
 753         if (ospf_is_type_redistributed(ospf, DEFAULT_ROUTE, 0)) {
 754                 /* if ospf->default_originate changes value, is calling
 755                    ospf_external_lsa_refresh_default sufficient to implement
 756                    the change? */
 757                 ospf_external_lsa_refresh_default(ospf);
 758
 759                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 760                         zlog_debug(
 761                                 "Redistribute[%s]: Refresh  Type[%d], Metric[%d]",
 762                                 ospf_redist_string(DEFAULT_ROUTE),
 763                                 metric_type(ospf, DEFAULT_ROUTE, 0),
 764                                 metric_value(ospf, DEFAULT_ROUTE, 0));
 765                 return CMD_SUCCESS;
 766         }
 767
 768         zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD, zclient,
 769                                      ospf->vrf_id);
 770
 771         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 772                 zlog_debug("Redistribute[DEFAULT]: Start  Type[%d], Metric[%d]",
 773                            metric_type(ospf, DEFAULT_ROUTE, 0),
 774                            metric_value(ospf, DEFAULT_ROUTE, 0));
 775
 776         if (ospf->router_id.s_addr == 0)
 777                 ospf->external_origin |= (1 << DEFAULT_ROUTE);
 778         else
 779                 thread_add_timer(master, ospf_default_originate_timer, ospf, 1,
 780                                  NULL);
 781
 782         ospf_asbr_status_update(ospf, ++ospf->redistribute);
 783
 784         return CMD_SUCCESS;
 785 }
 786
 787 int ospf_redistribute_default_unset(struct ospf *ospf)
 788 {
 789         if (!ospf_is_type_redistributed(ospf, DEFAULT_ROUTE, 0))
 790                 return CMD_SUCCESS;
 791
 792         ospf->default_originate = DEFAULT_ORIGINATE_NONE;
 793         ospf_redist_del(ospf, DEFAULT_ROUTE, 0);
 794
 795         zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE, zclient,
 796                                      ospf->vrf_id);
 797
 798         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 799                 zlog_debug("Redistribute[DEFAULT]: Stop");
 800
 801         // Pending: how does the external_info cleanup work in this case?
 802
 803         ospf_asbr_status_update(ospf, --ospf->redistribute);
 804
 805         return CMD_SUCCESS;
 806 }
 807
 808 static int ospf_external_lsa_originate_check(struct ospf *ospf,
 809                                              struct external_info *ei)
 810 {
 811         /* If prefix is multicast, then do not originate LSA. */
 812         if (IN_MULTICAST(htonl(ei->p.prefix.s_addr))) {
 813                 zlog_info(
 814                         "LSA[Type5:%s]: Not originate AS-external-LSA, "
 815                         "Prefix belongs multicast",
 816                         inet_ntoa(ei->p.prefix));
 817                 return 0;
 818         }
 819
 820         /* Take care of default-originate. */
 821         if (is_prefix_default(&ei->p))
 822                 if (ospf->default_originate == DEFAULT_ORIGINATE_NONE) {
 823                         zlog_info(
 824                                 "LSA[Type5:0.0.0.0]: Not originate AS-external-LSA "
 825                                 "for default");
 826                         return 0;
 827                 }
 828
 829         return 1;
 830 }
 831
 832 /* If connected prefix is OSPF enable interface, then do not announce. */
 833 int ospf_distribute_check_connected(struct ospf *ospf, struct external_info *ei)
 834 {
 835         struct listnode *node;
 836         struct ospf_interface *oi;
 837
 838
 839         for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi))
 840                 if (prefix_match(oi->address, (struct prefix *)&ei->p))
 841                         return 0;
 842         return 1;
 843 }
 844
 845 /* return 1 if external LSA must be originated, 0 otherwise */
 846 int ospf_redistribute_check(struct ospf *ospf, struct external_info *ei,
 847                             int *changed)
 848 {
 849         struct route_map_set_values save_values;
 850         struct prefix_ipv4 *p = &ei->p;
 851         struct ospf_redist *red;
 852         uint8_t type = is_prefix_default(&ei->p) ? DEFAULT_ROUTE : ei->type;
 853         unsigned short instance = is_prefix_default(&ei->p) ? 0 : ei->instance;
 854
 855         if (changed)
 856                 *changed = 0;
 857
 858         if (!ospf_external_lsa_originate_check(ospf, ei))
 859                 return 0;
 860
 861         /* Take care connected route. */
 862         if (type == ZEBRA_ROUTE_CONNECT
 863             && !ospf_distribute_check_connected(ospf, ei))
 864                 return 0;
 865
 866         if (!DEFAULT_ROUTE_TYPE(type) && DISTRIBUTE_NAME(ospf, type))
 867                 /* distirbute-list exists, but access-list may not? */
 868                 if (DISTRIBUTE_LIST(ospf, type))
 869                         if (access_list_apply(DISTRIBUTE_LIST(ospf, type), p)
 870                             == FILTER_DENY) {
 871                                 if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 872                                         zlog_debug(
 873                                                 "Redistribute[%s]: %s/%d filtered by ditribute-list.",
 874                                                 ospf_redist_string(type),
 875                                                 inet_ntoa(p->prefix),
 876                                                 p->prefixlen);
 877                                 return 0;
 878                         }
 879
 880         save_values = ei->route_map_set;
 881         ospf_reset_route_map_set_values(&ei->route_map_set);
 882
 883         /* apply route-map if needed */
 884         red = ospf_redist_lookup(ospf, type, instance);
 885         if (red && ROUTEMAP_NAME(red)) {
 886                 int ret;
 887
 888                 ret = route_map_apply(ROUTEMAP(red), (struct prefix *)p,
 889                                       RMAP_OSPF, ei);
 890
 891                 if (ret == RMAP_DENYMATCH) {
 892                         ei->route_map_set = save_values;
 893                         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
 894                                 zlog_debug(
 895                                         "Redistribute[%s]: %s/%d filtered by route-map.",
 896                                         ospf_redist_string(type),
 897                                         inet_ntoa(p->prefix), p->prefixlen);
 898                         return 0;
 899                 }
 900
 901                 /* check if 'route-map set' changed something */
 902                 if (changed)
 903                         *changed = !ospf_route_map_set_compare(
 904                                 &ei->route_map_set, &save_values);
 905         }
 906
 907         return 1;
 908 }
 909
 910 /* OSPF route-map set for redistribution */
 911 void ospf_routemap_set(struct ospf_redist *red, const char *name)
 912 {
 913         if (ROUTEMAP_NAME(red))
 914                 free(ROUTEMAP_NAME(red));
 915
 916         ROUTEMAP_NAME(red) = strdup(name);
 917         ROUTEMAP(red) = route_map_lookup_by_name(name);
 918 }
 919
 920 void ospf_routemap_unset(struct ospf_redist *red)
 921 {
 922         if (ROUTEMAP_NAME(red))
 923                 free(ROUTEMAP_NAME(red));
 924
 925         ROUTEMAP_NAME(red) = NULL;
 926         ROUTEMAP(red) = NULL;
 927 }
 928
 929 /* Zebra route add and delete treatment. */
 930 static int ospf_zebra_read_route(int command, struct zclient *zclient,
 931                                  zebra_size_t length, vrf_id_t vrf_id)
 932 {
 933         struct zapi_route api;
 934         struct prefix_ipv4 p;
 935         unsigned long ifindex;
 936         struct in_addr nexthop;
 937         struct external_info *ei;
 938         struct ospf *ospf;
 939         int i;
 940
 941         ospf = ospf_lookup_by_vrf_id(vrf_id);
 942         if (ospf == NULL)
 943                 return 0;
 944
 945         if (zapi_route_decode(zclient->ibuf, &api) < 0)
 946                 return -1;
 947
 948         ifindex = api.nexthops[0].ifindex;
 949         nexthop = api.nexthops[0].gate.ipv4;
 950
 951         memcpy(&p, &api.prefix, sizeof(p));
 952         if (IPV4_NET127(ntohl(p.prefix.s_addr)))
 953                 return 0;
 954
 955         if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
 956                 char buf_prefix[PREFIX_STRLEN];
 957                 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
 958
 959                 zlog_debug("%s: from client %s: vrf_id %d, p %s", __func__,
 960                            zebra_route_string(api.type), vrf_id, buf_prefix);
 961         }
 962
 963         if (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD) {
 964                 /* XXX|HACK|TODO|FIXME:
 965                  * Maybe we should ignore reject/blackhole routes? Testing
 966                  * shows that there is no problems though and this is only way
 967                  * to "summarize" routes in ASBR at the moment. Maybe we need
 968                  * just a better generalised solution for these types?
 969                  */
 970
 971                 /* Protocol tag overwrites all other tag value sent by zebra */
 972                 if (ospf->dtag[api.type] > 0)
 973                         api.tag = ospf->dtag[api.type];
 974
 975                 /*
 976                  * Given zebra sends update for a prefix via ADD message, it
 977                  * should
 978                  * be considered as an implicit DEL for that prefix with other
 979                  * source
 980                  * types.
 981                  */
 982                 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
 983                         if (i != api.type)
 984                                 ospf_external_info_delete(ospf, i, api.instance,
 985                                                           p);
 986
 987                 ei = ospf_external_info_add(ospf, api.type, api.instance, p,
 988                                             ifindex, nexthop, api.tag);
 989                 if (ei == NULL) {
 990                         /* Nothing has changed, so nothing to do; return */
 991                         return 0;
 992                 }
 993                 if (ospf->router_id.s_addr == 0)
 994                         /* Set flags to generate AS-external-LSA originate event
 995                            for each redistributed protocols later. */
 996                         ospf->external_origin |= (1 << api.type);
 997                 else {
 998                         if (ei) {
 999                                 if (is_prefix_default(&p))
1000                                         ospf_external_lsa_refresh_default(ospf);
1001                                 else {
1002                                         struct ospf_lsa *current;
1003
1004                                         current = ospf_external_info_find_lsa(
1005                                                 ospf, &ei->p);
1006                                         if (!current)
1007                                                 ospf_external_lsa_originate(
1008                                                         ospf, ei);
1009                                         else {
1010                                                 if (IS_DEBUG_OSPF(
1011                                                             zebra,
1012                                                             ZEBRA_REDISTRIBUTE))
1013                                                         zlog_debug(
1014                                                                 "ospf_zebra_read_route() : %s refreshing LSA",
1015                                                                 inet_ntoa(
1016                                                                         p.prefix));
1017                                                 ospf_external_lsa_refresh(
1018                                                         ospf, current, ei,
1019                                                         LSA_REFRESH_FORCE);
1020                                         }
1021                                 }
1022                         }
1023                 }
1024         } else /* if (command == ZEBRA_REDISTRIBUTE_ROUTE_DEL) */
1025         {
1026                 ospf_external_info_delete(ospf, api.type, api.instance, p);
1027                 if (is_prefix_default(&p))
1028                         ospf_external_lsa_refresh_default(ospf);
1029                 else
1030                         ospf_external_lsa_flush(ospf, api.type, &p,
1031                                                 ifindex /*, nexthop */);
1032         }
1033
1034         return 0;
1035 }
1036
1037
1038 int ospf_distribute_list_out_set(struct ospf *ospf, int type, const char *name)
1039 {
1040         /* Lookup access-list for distribute-list. */
1041         DISTRIBUTE_LIST(ospf, type) = access_list_lookup(AFI_IP, name);
1042
1043         /* Clear previous distribute-name. */
1044         if (DISTRIBUTE_NAME(ospf, type))
1045                 free(DISTRIBUTE_NAME(ospf, type));
1046
1047         /* Set distribute-name. */
1048         DISTRIBUTE_NAME(ospf, type) = strdup(name);
1049
1050         /* If access-list have been set, schedule update timer. */
1051         if (DISTRIBUTE_LIST(ospf, type))
1052                 ospf_distribute_list_update(ospf, type, 0);
1053
1054         return CMD_SUCCESS;
1055 }
1056
1057 int ospf_distribute_list_out_unset(struct ospf *ospf, int type,
1058                                    const char *name)
1059 {
1060         /* Schedule update timer. */
1061         if (DISTRIBUTE_LIST(ospf, type))
1062                 ospf_distribute_list_update(ospf, type, 0);
1063
1064         /* Unset distribute-list. */
1065         DISTRIBUTE_LIST(ospf, type) = NULL;
1066
1067         /* Clear distribute-name. */
1068         if (DISTRIBUTE_NAME(ospf, type))
1069                 free(DISTRIBUTE_NAME(ospf, type));
1070
1071         DISTRIBUTE_NAME(ospf, type) = NULL;
1072
1073         return CMD_SUCCESS;
1074 }
1075
1076 /* distribute-list update timer. */
1077 static int ospf_distribute_list_update_timer(struct thread *thread)
1078 {
1079         struct route_node *rn;
1080         struct external_info *ei;
1081         struct route_table *rt;
1082         struct ospf_lsa *lsa;
1083         int type, default_refresh = 0, arg_type;
1084         struct ospf *ospf = NULL;
1085         void **arg = THREAD_ARG(thread);
1086
1087         ospf = (struct ospf *)arg[0];
1088         arg_type = (int)(intptr_t)arg[1];
1089
1090         if (ospf == NULL)
1091                 return 0;
1092
1093         ospf->t_distribute_update = NULL;
1094
1095         zlog_info("Zebra[Redistribute]: distribute-list update timer fired!");
1096
1097         if (IS_DEBUG_OSPF_EVENT) {
1098                 zlog_debug(
1099                         "%s: ospf distribute-list update arg_type %d vrf %s id %d",
1100                         __PRETTY_FUNCTION__, arg_type,
1101                         ospf_vrf_id_to_name(ospf->vrf_id), ospf->vrf_id);
1102         }
1103
1104         /* foreach all external info. */
1105         for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
1106                 struct list *ext_list;
1107                 struct listnode *node;
1108                 struct ospf_external *ext;
1109
1110                 ext_list = ospf->external[type];
1111                 if (!ext_list)
1112                         continue;
1113
1114                 for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) {
1115                         rt = ext->external_info;
1116                         if (!rt)
1117                                 continue;
1118                         for (rn = route_top(rt); rn; rn = route_next(rn))
1119                                 if ((ei = rn->info) != NULL) {
1120                                         if (is_prefix_default(&ei->p))
1121                                                 default_refresh = 1;
1122                                         else if (
1123                                                 (lsa = ospf_external_info_find_lsa(
1124                                                          ospf, &ei->p)))
1125                                                 ospf_external_lsa_refresh(
1126                                                         ospf, lsa, ei,
1127                                                         LSA_REFRESH_IF_CHANGED);
1128                                         else
1129                                                 ospf_external_lsa_originate(
1130                                                         ospf, ei);
1131                                 }
1132                 }
1133         }
1134         if (default_refresh)
1135                 ospf_external_lsa_refresh_default(ospf);
1136
1137         XFREE(MTYPE_OSPF_DIST_ARGS, arg);
1138         return 0;
1139 }
1140
1141 /* Update distribute-list and set timer to apply access-list. */
1142 void ospf_distribute_list_update(struct ospf *ospf, int type,
1143                                  unsigned short instance)
1144 {
1145         struct route_table *rt;
1146         struct ospf_external *ext;
1147         void **args = XCALLOC(MTYPE_OSPF_DIST_ARGS, sizeof(void *) * 2);
1148
1149         args[0] = ospf;
1150         args[1] = (void *)((ptrdiff_t)type);
1151
1152         /* External info does not exist. */
1153         ext = ospf_external_lookup(ospf, type, instance);
1154         if (!ext || !(rt = EXTERNAL_INFO(ext))) {
1155                 XFREE(MTYPE_OSPF_DIST_ARGS, args);
1156                 return;
1157         }
1158
1159         /* If exists previously invoked thread, then let it continue. */
1160         if (ospf->t_distribute_update) {
1161                 XFREE(MTYPE_OSPF_DIST_ARGS, args);
1162                 return;
1163         }
1164
1165         /* Set timer. */
1166         ospf->t_distribute_update = NULL;
1167         thread_add_timer_msec(master, ospf_distribute_list_update_timer,
1168                               (void **)args, ospf->min_ls_interval,
1169                               &ospf->t_distribute_update);
1170 }
1171
1172 /* If access-list is updated, apply some check. */
1173 static void ospf_filter_update(struct access_list *access)
1174 {
1175         struct ospf *ospf;
1176         int type;
1177         int abr_inv = 0;
1178         struct ospf_area *area;
1179         struct listnode *node, *n1;
1180
1181         /* If OSPF instance does not exist, return right now. */
1182         if (listcount(om->ospf) == 0)
1183                 return;
1184
1185         /* Iterate all ospf [VRF] instances */
1186         for (ALL_LIST_ELEMENTS_RO(om->ospf, n1, ospf)) {
1187                 /* Update distribute-list, and apply filter. */
1188                 for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
1189                         struct list *red_list;
1190                         struct listnode *node;
1191                         struct ospf_redist *red;
1192
1193                         red_list = ospf->redist[type];
1194                         if (red_list)
1195                                 for (ALL_LIST_ELEMENTS_RO(red_list, node,
1196                                                           red)) {
1197                                         if (ROUTEMAP(red)) {
1198                                                 /* if route-map is not NULL it
1199                                                  * may be
1200                                                  * using this access list */
1201                                                 ospf_distribute_list_update(
1202                                                         ospf, type,
1203                                                         red->instance);
1204                                         }
1205                                 }
1206
1207                         /* There is place for route-map for default-information
1208                          * (ZEBRA_ROUTE_MAX),
1209                          * but no distribute list. */
1210                         if (type == ZEBRA_ROUTE_MAX)
1211                                 break;
1212
1213                         if (DISTRIBUTE_NAME(ospf, type)) {
1214                                 /* Keep old access-list for distribute-list. */
1215                                 struct access_list *old =
1216                                         DISTRIBUTE_LIST(ospf, type);
1217
1218                                 /* Update access-list for distribute-list. */
1219                                 DISTRIBUTE_LIST(ospf, type) =
1220                                         access_list_lookup(
1221                                                 AFI_IP,
1222                                                 DISTRIBUTE_NAME(ospf, type));
1223
1224                                 /* No update for this distribute type. */
1225                                 if (old == NULL
1226                                     && DISTRIBUTE_LIST(ospf, type) == NULL)
1227                                         continue;
1228
1229                                 /* Schedule distribute-list update timer. */
1230                                 if (DISTRIBUTE_LIST(ospf, type) == NULL
1231                                     || strcmp(DISTRIBUTE_NAME(ospf, type),
1232                                               access->name)
1233                                                == 0)
1234                                         ospf_distribute_list_update(ospf, type,
1235                                                                     0);
1236                         }
1237                 }
1238
1239                 /* Update Area access-list. */
1240                 for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) {
1241                         if (EXPORT_NAME(area)) {
1242                                 EXPORT_LIST(area) = NULL;
1243                                 abr_inv++;
1244                         }
1245
1246                         if (IMPORT_NAME(area)) {
1247                                 IMPORT_LIST(area) = NULL;
1248                                 abr_inv++;
1249                         }
1250                 }
1251
1252                 /* Schedule ABR tasks -- this will be changed -- takada. */
1253                 if (IS_OSPF_ABR(ospf) && abr_inv)
1254                         ospf_schedule_abr_task(ospf);
1255         }
1256 }
1257
1258 /* If prefix-list is updated, do some updates. */
1259 void ospf_prefix_list_update(struct prefix_list *plist)
1260 {
1261         struct ospf *ospf = NULL;
1262         int type;
1263         int abr_inv = 0;
1264         struct ospf_area *area;
1265         struct listnode *node, *n1;
1266
1267         /* If OSPF instatnce does not exist, return right now. */
1268         if (listcount(om->ospf) == 0)
1269                 return;
1270
1271         /* Iterate all ospf [VRF] instances */
1272         for (ALL_LIST_ELEMENTS_RO(om->ospf, n1, ospf)) {
1273
1274                 /* Update all route-maps which are used
1275                  * as redistribution filters.
1276                  * They might use prefix-list.
1277                  */
1278                 for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
1279                         struct list *red_list;
1280                         struct listnode *node;
1281                         struct ospf_redist *red;
1282
1283                         red_list = ospf->redist[type];
1284                         if (red_list) {
1285                                 for (ALL_LIST_ELEMENTS_RO(red_list, node,
1286                                                           red)) {
1287                                         if (ROUTEMAP(red)) {
1288                                                 /* if route-map is not NULL
1289                                                  * it may be using
1290                                                  * this prefix list */
1291                                                 ospf_distribute_list_update(
1292                                                         ospf, type,
1293                                                         red->instance);
1294                                         }
1295                                 }
1296                         }
1297                 }
1298
1299                 /* Update area filter-lists. */
1300                 for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) {
1301                         /* Update filter-list in. */
1302                         if (PREFIX_NAME_IN(area))
1303                                 if (strcmp(PREFIX_NAME_IN(area),
1304                                            prefix_list_name(plist))
1305                                     == 0) {
1306                                         PREFIX_LIST_IN(area) =
1307                                                 prefix_list_lookup(
1308                                                         AFI_IP,
1309                                                         PREFIX_NAME_IN(area));
1310                                         abr_inv++;
1311                                 }
1312
1313                         /* Update filter-list out. */
1314                         if (PREFIX_NAME_OUT(area))
1315                                 if (strcmp(PREFIX_NAME_OUT(area),
1316                                            prefix_list_name(plist))
1317                                     == 0) {
1318                                         PREFIX_LIST_IN(area) =
1319                                                 prefix_list_lookup(
1320                                                         AFI_IP,
1321                                                         PREFIX_NAME_OUT(area));
1322                                         abr_inv++;
1323                                 }
1324                 }
1325
1326                 /* Schedule ABR task. */
1327                 if (IS_OSPF_ABR(ospf) && abr_inv)
1328                         ospf_schedule_abr_task(ospf);
1329         }
1330 }
1331
1332 static struct ospf_distance *ospf_distance_new(void)
1333 {
1334         return XCALLOC(MTYPE_OSPF_DISTANCE, sizeof(struct ospf_distance));
1335 }
1336
1337 static void ospf_distance_free(struct ospf_distance *odistance)
1338 {
1339         XFREE(MTYPE_OSPF_DISTANCE, odistance);
1340 }
1341
1342 int ospf_distance_set(struct vty *vty, struct ospf *ospf,
1343                       const char *distance_str, const char *ip_str,
1344                       const char *access_list_str)
1345 {
1346         int ret;
1347         struct prefix_ipv4 p;
1348         uint8_t distance;
1349         struct route_node *rn;
1350         struct ospf_distance *odistance;
1351
1352         ret = str2prefix_ipv4(ip_str, &p);
1353         if (ret == 0) {
1354                 vty_out(vty, "Malformed prefix\n");
1355                 return CMD_WARNING_CONFIG_FAILED;
1356         }
1357
1358         distance = atoi(distance_str);
1359
1360         /* Get OSPF distance node. */
1361         rn = route_node_get(ospf->distance_table, (struct prefix *)&p);
1362         if (rn->info) {
1363                 odistance = rn->info;
1364                 route_unlock_node(rn);
1365         } else {
1366                 odistance = ospf_distance_new();
1367                 rn->info = odistance;
1368         }
1369
1370         /* Set distance value. */
1371         odistance->distance = distance;
1372
1373         /* Reset access-list configuration. */
1374         if (odistance->access_list) {
1375                 free(odistance->access_list);
1376                 odistance->access_list = NULL;
1377         }
1378         if (access_list_str)
1379                 odistance->access_list = strdup(access_list_str);
1380
1381         return CMD_SUCCESS;
1382 }
1383
1384 int ospf_distance_unset(struct vty *vty, struct ospf *ospf,
1385                         const char *distance_str, const char *ip_str,
1386                         char const *access_list_str)
1387 {
1388         int ret;
1389         struct prefix_ipv4 p;
1390         struct route_node *rn;
1391         struct ospf_distance *odistance;
1392
1393         ret = str2prefix_ipv4(ip_str, &p);
1394         if (ret == 0) {
1395                 vty_out(vty, "Malformed prefix\n");
1396                 return CMD_WARNING_CONFIG_FAILED;
1397         }
1398
1399         rn = route_node_lookup(ospf->distance_table, (struct prefix *)&p);
1400         if (!rn) {
1401                 vty_out(vty, "Can't find specified prefix\n");
1402                 return CMD_WARNING_CONFIG_FAILED;
1403         }
1404
1405         odistance = rn->info;
1406
1407         if (odistance->access_list)
1408                 free(odistance->access_list);
1409         ospf_distance_free(odistance);
1410
1411         rn->info = NULL;
1412         route_unlock_node(rn);
1413         route_unlock_node(rn);
1414
1415         return CMD_SUCCESS;
1416 }
1417
1418 void ospf_distance_reset(struct ospf *ospf)
1419 {
1420         struct route_node *rn;
1421         struct ospf_distance *odistance;
1422
1423         for (rn = route_top(ospf->distance_table); rn; rn = route_next(rn))
1424                 if ((odistance = rn->info) != NULL) {
1425                         if (odistance->access_list)
1426                                 free(odistance->access_list);
1427                         ospf_distance_free(odistance);
1428                         rn->info = NULL;
1429                         route_unlock_node(rn);
1430                 }
1431 }
1432
1433 uint8_t ospf_distance_apply(struct ospf *ospf, struct prefix_ipv4 *p,
1434                             struct ospf_route * or)
1435 {
1436
1437         if (ospf == NULL)
1438                 return 0;
1439
1440         if (ospf->distance_intra)
1441                 if (or->path_type == OSPF_PATH_INTRA_AREA)
1442                         return ospf->distance_intra;
1443
1444         if (ospf->distance_inter)
1445                 if (or->path_type == OSPF_PATH_INTER_AREA)
1446                         return ospf->distance_inter;
1447
1448         if (ospf->distance_external)
1449                 if (or->path_type == OSPF_PATH_TYPE1_EXTERNAL ||
1450                     or->path_type == OSPF_PATH_TYPE2_EXTERNAL)
1451                         return ospf->distance_external;
1452
1453         if (ospf->distance_all)
1454                 return ospf->distance_all;
1455
1456         return 0;
1457 }
1458
1459 void ospf_zebra_vrf_register(struct ospf *ospf)
1460 {
1461         if (!zclient || zclient->sock < 0 || !ospf)
1462                 return;
1463
1464         if (ospf->vrf_id != VRF_UNKNOWN) {
1465                 if (IS_DEBUG_OSPF_EVENT)
1466                         zlog_debug("%s: Register VRF %s id %u",
1467                                    __PRETTY_FUNCTION__,
1468                                    ospf_vrf_id_to_name(ospf->vrf_id),
1469                                    ospf->vrf_id);
1470                 zclient_send_reg_requests(zclient, ospf->vrf_id);
1471         }
1472 }
1473
1474 void ospf_zebra_vrf_deregister(struct ospf *ospf)
1475 {
1476         if (!zclient || zclient->sock < 0 || !ospf)
1477                 return;
1478
1479         if (ospf->vrf_id != VRF_DEFAULT && ospf->vrf_id != VRF_UNKNOWN) {
1480                 if (IS_DEBUG_OSPF_EVENT)
1481                         zlog_debug("%s: De-Register VRF %s id %u to Zebra.",
1482                                    __PRETTY_FUNCTION__,
1483                                    ospf_vrf_id_to_name(ospf->vrf_id),
1484                                    ospf->vrf_id);
1485                 /* Deregister for router-id, interfaces,
1486                  * redistributed routes. */
1487                 zclient_send_dereg_requests(zclient, ospf->vrf_id);
1488         }
1489 }
1490 static void ospf_zebra_connected(struct zclient *zclient)
1491 {
1492         /* Send the client registration */
1493         bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER);
1494
1495         zclient_send_reg_requests(zclient, VRF_DEFAULT);
1496 }
1497
1498 void ospf_zebra_init(struct thread_master *master, unsigned short instance)
1499 {
1500         /* Allocate zebra structure. */
1501         zclient = zclient_new_notify(master, &zclient_options_default);
1502         zclient_init(zclient, ZEBRA_ROUTE_OSPF, instance, &ospfd_privs);
1503         zclient->zebra_connected = ospf_zebra_connected;
1504         zclient->router_id_update = ospf_router_id_update_zebra;
1505         zclient->interface_add = ospf_interface_add;
1506         zclient->interface_delete = ospf_interface_delete;
1507         zclient->interface_up = ospf_interface_state_up;
1508         zclient->interface_down = ospf_interface_state_down;
1509         zclient->interface_address_add = ospf_interface_address_add;
1510         zclient->interface_address_delete = ospf_interface_address_delete;
1511         zclient->interface_link_params = ospf_interface_link_params;
1512         zclient->interface_vrf_update = ospf_interface_vrf_update;
1513
1514         zclient->redistribute_route_add = ospf_zebra_read_route;
1515         zclient->redistribute_route_del = ospf_zebra_read_route;
1516
1517         access_list_add_hook(ospf_filter_update);
1518         access_list_delete_hook(ospf_filter_update);
1519         prefix_list_add_hook(ospf_prefix_list_update);
1520         prefix_list_delete_hook(ospf_prefix_list_update);
1521 }