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