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