ospf6d/ospf6_zebra.c

   1 /*
   2  * Copyright (C) 2003 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22
  23 #include "log.h"
  24 #include "vty.h"
  25 #include "command.h"
  26 #include "prefix.h"
  27 #include "stream.h"
  28 #include "zclient.h"
  29 #include "memory.h"
  30 #include "lib/bfd.h"
  31
  32 #include "ospf6_proto.h"
  33 #include "ospf6_top.h"
  34 #include "ospf6_interface.h"
  35 #include "ospf6_route.h"
  36 #include "ospf6_lsa.h"
  37 #include "ospf6_lsdb.h"
  38 #include "ospf6_asbr.h"
  39 #include "ospf6_zebra.h"
  40 #include "ospf6d.h"
  41
  42 DEFINE_MTYPE_STATIC(OSPF6D, OSPF6_DISTANCE, "OSPF6 distance")
  43
  44 unsigned char conf_debug_ospf6_zebra = 0;
  45
  46 /* information about zebra. */
  47 struct zclient *zclient = NULL;
  48
  49 struct in_addr router_id_zebra;
  50
  51 /* Router-id update message from zebra. */
  52 static int ospf6_router_id_update_zebra(int command, struct zclient *zclient,
  53                                         zebra_size_t length, vrf_id_t vrf_id)
  54 {
  55         struct prefix router_id;
  56         struct ospf6 *o = ospf6;
  57
  58         zebra_router_id_update_read(zclient->ibuf, &router_id);
  59         router_id_zebra = router_id.u.prefix4;
  60
  61         if (o == NULL)
  62                 return 0;
  63
  64         if (o->router_id == 0)
  65                 o->router_id = (u_int32_t)router_id_zebra.s_addr;
  66
  67         return 0;
  68 }
  69
  70 /* redistribute function */
  71 void ospf6_zebra_redistribute(int type)
  72 {
  73         if (vrf_bitmap_check(zclient->redist[AFI_IP6][type], VRF_DEFAULT))
  74                 return;
  75         vrf_bitmap_set(zclient->redist[AFI_IP6][type], VRF_DEFAULT);
  76
  77         if (zclient->sock > 0)
  78                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient,
  79                                         AFI_IP6, type, 0, VRF_DEFAULT);
  80 }
  81
  82 void ospf6_zebra_no_redistribute(int type)
  83 {
  84         if (!vrf_bitmap_check(zclient->redist[AFI_IP6][type], VRF_DEFAULT))
  85                 return;
  86         vrf_bitmap_unset(zclient->redist[AFI_IP6][type], VRF_DEFAULT);
  87         if (zclient->sock > 0)
  88                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
  89                                         AFI_IP6, type, 0, VRF_DEFAULT);
  90 }
  91
  92 /* Inteface addition message from zebra. */
  93 static int ospf6_zebra_if_add(int command, struct zclient *zclient,
  94                               zebra_size_t length, vrf_id_t vrf_id)
  95 {
  96         struct interface *ifp;
  97
  98         ifp = zebra_interface_add_read(zclient->ibuf, vrf_id);
  99         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 100                 zlog_debug("Zebra Interface add: %s index %d mtu %d", ifp->name,
 101                            ifp->ifindex, ifp->mtu6);
 102         ospf6_interface_if_add(ifp);
 103         return 0;
 104 }
 105
 106 static int ospf6_zebra_if_del(int command, struct zclient *zclient,
 107                               zebra_size_t length, vrf_id_t vrf_id)
 108 {
 109         struct interface *ifp;
 110
 111         if (!(ifp = zebra_interface_state_read(zclient->ibuf, vrf_id)))
 112                 return 0;
 113
 114         if (if_is_up(ifp))
 115                 zlog_warn("Zebra: got delete of %s, but interface is still up",
 116                           ifp->name);
 117
 118         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 119                 zlog_debug("Zebra Interface delete: %s index %d mtu %d",
 120                            ifp->name, ifp->ifindex, ifp->mtu6);
 121
 122 #if 0
 123   /* XXX: ospf6_interface_if_del is not the right way to handle this,
 124    * because among other thinkable issues, it will also clear all
 125    * settings as they are contained in the struct ospf6_interface. */
 126   ospf6_interface_if_del (ifp);
 127 #endif /*0*/
 128
 129         ifp->ifindex = IFINDEX_DELETED;
 130         return 0;
 131 }
 132
 133 static int ospf6_zebra_if_state_update(int command, struct zclient *zclient,
 134                                        zebra_size_t length, vrf_id_t vrf_id)
 135 {
 136         struct interface *ifp;
 137
 138         ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
 139         if (ifp == NULL)
 140                 return 0;
 141
 142         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 143                 zlog_debug(
 144                         "Zebra Interface state change: "
 145                         "%s index %d flags %llx metric %d mtu %d bandwidth %d",
 146                         ifp->name, ifp->ifindex, (unsigned long long)ifp->flags,
 147                         ifp->metric, ifp->mtu6, ifp->bandwidth);
 148
 149         ospf6_interface_state_update(ifp);
 150         return 0;
 151 }
 152
 153 static int ospf6_zebra_if_address_update_add(int command,
 154                                              struct zclient *zclient,
 155                                              zebra_size_t length,
 156                                              vrf_id_t vrf_id)
 157 {
 158         struct connected *c;
 159         char buf[128];
 160
 161         c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD,
 162                                          zclient->ibuf, vrf_id);
 163         if (c == NULL)
 164                 return 0;
 165
 166         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 167                 zlog_debug("Zebra Interface address add: %s %5s %s/%d",
 168                            c->ifp->name, prefix_family_str(c->address),
 169                            inet_ntop(c->address->family, &c->address->u.prefix,
 170                                      buf, sizeof(buf)),
 171                            c->address->prefixlen);
 172
 173         if (c->address->family == AF_INET6) {
 174                 ospf6_interface_state_update(c->ifp);
 175                 ospf6_interface_connected_route_update(c->ifp);
 176         }
 177         return 0;
 178 }
 179
 180 static int ospf6_zebra_if_address_update_delete(int command,
 181                                                 struct zclient *zclient,
 182                                                 zebra_size_t length,
 183                                                 vrf_id_t vrf_id)
 184 {
 185         struct connected *c;
 186         char buf[128];
 187
 188         c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE,
 189                                          zclient->ibuf, vrf_id);
 190         if (c == NULL)
 191                 return 0;
 192
 193         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 194                 zlog_debug("Zebra Interface address delete: %s %5s %s/%d",
 195                            c->ifp->name, prefix_family_str(c->address),
 196                            inet_ntop(c->address->family, &c->address->u.prefix,
 197                                      buf, sizeof(buf)),
 198                            c->address->prefixlen);
 199
 200         if (c->address->family == AF_INET6) {
 201                 ospf6_interface_connected_route_update(c->ifp);
 202                 ospf6_interface_state_update(c->ifp);
 203         }
 204
 205         connected_free(c);
 206
 207         return 0;
 208 }
 209
 210 static int ospf6_zebra_read_ipv6(int command, struct zclient *zclient,
 211                                  zebra_size_t length, vrf_id_t vrf_id)
 212 {
 213         struct stream *s;
 214         struct zapi_ipv6 api;
 215         unsigned long ifindex;
 216         struct prefix p, src_p;
 217         struct in6_addr *nexthop;
 218
 219         if (ospf6 == NULL)
 220                 return 0;
 221
 222         s = zclient->ibuf;
 223         ifindex = 0;
 224         nexthop = NULL;
 225         memset(&api, 0, sizeof(api));
 226
 227         /* Type, flags, message. */
 228         api.type = stream_getc(s);
 229         api.instance = stream_getw(s);
 230         api.flags = stream_getl(s);
 231         api.message = stream_getc(s);
 232
 233         /* IPv6 prefix. */
 234         memset(&p, 0, sizeof(struct prefix));
 235         p.family = AF_INET6;
 236         p.prefixlen = MIN(IPV6_MAX_PREFIXLEN, stream_getc(s));
 237         stream_get(&p.u.prefix6, s, PSIZE(p.prefixlen));
 238
 239         memset(&src_p, 0, sizeof(struct prefix));
 240         src_p.family = AF_INET6;
 241         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
 242                 src_p.prefixlen = stream_getc(s);
 243                 stream_get(&src_p.u.prefix6, s, PSIZE(src_p.prefixlen));
 244         }
 245
 246         if (src_p.prefixlen)
 247                 /* we completely ignore srcdest routes for now. */
 248                 return 0;
 249
 250         /* Nexthop, ifindex, distance, metric. */
 251         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)) {
 252                 api.nexthop_num = stream_getc(s);
 253                 nexthop = (struct in6_addr *)malloc(api.nexthop_num
 254                                                     * sizeof(struct in6_addr));
 255                 stream_get(nexthop, s,
 256                            api.nexthop_num * sizeof(struct in6_addr));
 257         }
 258         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX)) {
 259                 api.ifindex_num = stream_getc(s);
 260                 ifindex = stream_getl(s);
 261         }
 262         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
 263                 api.distance = stream_getc(s);
 264         else
 265                 api.distance = 0;
 266         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
 267                 api.metric = stream_getl(s);
 268         else
 269                 api.metric = 0;
 270
 271         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
 272                 api.tag = stream_getl(s);
 273         else
 274                 api.tag = 0;
 275
 276         if (IS_OSPF6_DEBUG_ZEBRA(RECV)) {
 277                 char prefixstr[PREFIX2STR_BUFFER], nexthopstr[128];
 278                 prefix2str((struct prefix *)&p, prefixstr, sizeof(prefixstr));
 279                 if (nexthop)
 280                         inet_ntop(AF_INET6, nexthop, nexthopstr,
 281                                   sizeof(nexthopstr));
 282                 else
 283                         snprintf(nexthopstr, sizeof(nexthopstr), "::");
 284
 285                 zlog_debug(
 286                         "Zebra Receive route %s: %s %s nexthop %s ifindex %ld tag %" ROUTE_TAG_PRI,
 287                         (command == ZEBRA_REDISTRIBUTE_IPV6_ADD ? "add"
 288                                                                 : "delete"),
 289                         zebra_route_string(api.type), prefixstr, nexthopstr,
 290                         ifindex, api.tag);
 291         }
 292
 293         if (command == ZEBRA_REDISTRIBUTE_IPV6_ADD)
 294                 ospf6_asbr_redistribute_add(api.type, ifindex, &p,
 295                                             api.nexthop_num, nexthop, api.tag);
 296         else
 297                 ospf6_asbr_redistribute_remove(api.type, ifindex, &p);
 298
 299         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP))
 300                 free(nexthop);
 301
 302         return 0;
 303 }
 304
 305 DEFUN (show_zebra,
 306        show_ospf6_zebra_cmd,
 307        "show ipv6 ospf6 zebra",
 308        SHOW_STR
 309        IPV6_STR
 310        OSPF6_STR
 311        "Zebra information\n")
 312 {
 313         int i;
 314         if (zclient == NULL) {
 315                 vty_out(vty, "Not connected to zebra\n");
 316                 return CMD_SUCCESS;
 317         }
 318
 319         vty_out(vty, "Zebra Infomation\n");
 320         vty_out(vty, "  fail: %d\n", zclient->fail);
 321         vty_out(vty, "  redistribute default: %d\n",
 322                 vrf_bitmap_check(zclient->default_information, VRF_DEFAULT));
 323         vty_out(vty, "  redistribute:");
 324         for (i = 0; i < ZEBRA_ROUTE_MAX; i++) {
 325                 if (vrf_bitmap_check(zclient->redist[AFI_IP6][i], VRF_DEFAULT))
 326                         vty_out(vty, " %s", zebra_route_string(i));
 327         }
 328         vty_out(vty, "\n");
 329         return CMD_SUCCESS;
 330 }
 331
 332 #define ADD    0
 333 #define REM    1
 334 static void ospf6_zebra_route_update(int type, struct ospf6_route *request)
 335 {
 336         struct zapi_route api;
 337         char buf[PREFIX2STR_BUFFER];
 338         int nhcount;
 339         int ret = 0;
 340         struct prefix *dest;
 341
 342         if (IS_OSPF6_DEBUG_ZEBRA(SEND)) {
 343                 prefix2str(&request->prefix, buf, sizeof(buf));
 344                 zlog_debug("Send %s route: %s",
 345                            (type == REM ? "remove" : "add"), buf);
 346         }
 347
 348         if (zclient->sock < 0) {
 349                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 350                         zlog_debug("  Not connected to Zebra");
 351                 return;
 352         }
 353
 354         if (request->path.origin.adv_router == ospf6->router_id
 355             && (request->path.type == OSPF6_PATH_TYPE_EXTERNAL1
 356                 || request->path.type == OSPF6_PATH_TYPE_EXTERNAL2)) {
 357                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 358                         zlog_debug("  Ignore self-originated external route");
 359                 return;
 360         }
 361
 362         /* If removing is the best path and if there's another path,
 363            treat this request as add the secondary path */
 364         if (type == REM && ospf6_route_is_best(request) && request->next
 365             && ospf6_route_is_same(request, request->next)) {
 366                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 367                         zlog_debug(
 368                                 "  Best-path removal resulted Sencondary addition");
 369                 type = ADD;
 370                 request = request->next;
 371         }
 372
 373         /* Only the best path will be sent to zebra. */
 374         if (!ospf6_route_is_best(request)) {
 375                 /* this is not preferred best route, ignore */
 376                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 377                         zlog_debug("  Ignore non-best route");
 378                 return;
 379         }
 380
 381         nhcount = ospf6_route_num_nexthops(request);
 382         if (nhcount == 0) {
 383                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 384                         zlog_debug("  No nexthop, ignore");
 385                 return;
 386         }
 387
 388         dest = &request->prefix;
 389
 390         memset(&api, 0, sizeof(api));
 391         api.vrf_id = VRF_DEFAULT;
 392         api.type = ZEBRA_ROUTE_OSPF6;
 393         api.safi = SAFI_UNICAST;
 394         api.prefix = *dest;
 395         SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
 396         api.nexthop_num = nhcount;
 397         ospf6_route_zebra_copy_nexthops(request, api.nexthops, nhcount);
 398         SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
 399         api.metric = (request->path.metric_type == 2 ? request->path.u.cost_e2
 400                                                      : request->path.cost);
 401         if (request->path.tag) {
 402                 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
 403                 api.tag = request->path.tag;
 404         }
 405
 406         SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
 407         api.distance =
 408                 ospf6_distance_apply((struct prefix_ipv6 *)dest, request);
 409
 410         if (type == REM)
 411                 ret = zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 412         else
 413                 ret = zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
 414
 415         if (ret < 0)
 416                 zlog_err("zclient_route_send() %s failed: %s",
 417                          (type == REM ? "delete" : "add"),
 418                          safe_strerror(errno));
 419
 420         return;
 421 }
 422
 423 void ospf6_zebra_route_update_add(struct ospf6_route *request)
 424 {
 425         ospf6_zebra_route_update(ADD, request);
 426 }
 427
 428 void ospf6_zebra_route_update_remove(struct ospf6_route *request)
 429 {
 430         ospf6_zebra_route_update(REM, request);
 431 }
 432
 433 void ospf6_zebra_add_discard(struct ospf6_route *request)
 434 {
 435         struct zapi_route api;
 436         char buf[INET6_ADDRSTRLEN];
 437         struct prefix *dest = &request->prefix;
 438
 439         if (!CHECK_FLAG(request->flag, OSPF6_ROUTE_BLACKHOLE_ADDED)) {
 440                 memset(&api, 0, sizeof(api));
 441                 api.vrf_id = VRF_DEFAULT;
 442                 api.type = ZEBRA_ROUTE_OSPF6;
 443                 api.flags = ZEBRA_FLAG_BLACKHOLE;
 444                 api.safi = SAFI_UNICAST;
 445                 api.prefix = *dest;
 446
 447                 zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
 448
 449                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 450                         zlog_debug("Zebra: Route add discard %s/%d",
 451                                    inet_ntop(AF_INET6, &dest->u.prefix6, buf,
 452                                              INET6_ADDRSTRLEN),
 453                                    dest->prefixlen);
 454
 455                 SET_FLAG(request->flag, OSPF6_ROUTE_BLACKHOLE_ADDED);
 456         } else {
 457                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 458                         zlog_debug(
 459                                 "Zebra: Blackhole route present already %s/%d",
 460                                 inet_ntop(AF_INET6, &dest->u.prefix6, buf,
 461                                           INET6_ADDRSTRLEN),
 462                                 dest->prefixlen);
 463         }
 464 }
 465
 466 void ospf6_zebra_delete_discard(struct ospf6_route *request)
 467 {
 468         struct zapi_route api;
 469         char buf[INET6_ADDRSTRLEN];
 470         struct prefix *dest = &request->prefix;
 471
 472         if (CHECK_FLAG(request->flag, OSPF6_ROUTE_BLACKHOLE_ADDED)) {
 473                 memset(&api, 0, sizeof(api));
 474                 api.vrf_id = VRF_DEFAULT;
 475                 api.type = ZEBRA_ROUTE_OSPF6;
 476                 api.flags = ZEBRA_FLAG_BLACKHOLE;
 477                 api.safi = SAFI_UNICAST;
 478                 api.prefix = *dest;
 479
 480                 zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 481
 482                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 483                         zlog_debug("Zebra: Route delete discard %s/%d",
 484                                    inet_ntop(AF_INET6, &dest->u.prefix6, buf,
 485                                              INET6_ADDRSTRLEN),
 486                                    dest->prefixlen);
 487
 488                 UNSET_FLAG(request->flag, OSPF6_ROUTE_BLACKHOLE_ADDED);
 489         } else {
 490                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 491                         zlog_debug(
 492                                 "Zebra: Blackhole route already deleted %s/%d",
 493                                 inet_ntop(AF_INET6, &dest->u.prefix6, buf,
 494                                           INET6_ADDRSTRLEN),
 495                                 dest->prefixlen);
 496         }
 497 }
 498
 499 static struct ospf6_distance *ospf6_distance_new(void)
 500 {
 501         return XCALLOC(MTYPE_OSPF6_DISTANCE, sizeof(struct ospf6_distance));
 502 }
 503
 504 static void ospf6_distance_free(struct ospf6_distance *odistance)
 505 {
 506         XFREE(MTYPE_OSPF6_DISTANCE, odistance);
 507 }
 508
 509 int ospf6_distance_set(struct vty *vty, struct ospf6 *o,
 510                        const char *distance_str, const char *ip_str,
 511                        const char *access_list_str)
 512 {
 513         int ret;
 514         struct prefix_ipv6 p;
 515         u_char distance;
 516         struct route_node *rn;
 517         struct ospf6_distance *odistance;
 518
 519         ret = str2prefix_ipv6(ip_str, &p);
 520         if (ret == 0) {
 521                 vty_out(vty, "Malformed prefix\n");
 522                 return CMD_WARNING_CONFIG_FAILED;
 523         }
 524
 525         distance = atoi(distance_str);
 526
 527         /* Get OSPF6 distance node. */
 528         rn = route_node_get(o->distance_table, (struct prefix *)&p);
 529         if (rn->info) {
 530                 odistance = rn->info;
 531                 route_unlock_node(rn);
 532         } else {
 533                 odistance = ospf6_distance_new();
 534                 rn->info = odistance;
 535         }
 536
 537         /* Set distance value. */
 538         odistance->distance = distance;
 539
 540         /* Reset access-list configuration. */
 541         if (odistance->access_list) {
 542                 free(odistance->access_list);
 543                 odistance->access_list = NULL;
 544         }
 545         if (access_list_str)
 546                 odistance->access_list = strdup(access_list_str);
 547
 548         return CMD_SUCCESS;
 549 }
 550
 551 int ospf6_distance_unset(struct vty *vty, struct ospf6 *o,
 552                          const char *distance_str, const char *ip_str,
 553                          const char *access_list_str)
 554 {
 555         int ret;
 556         struct prefix_ipv6 p;
 557         struct route_node *rn;
 558         struct ospf6_distance *odistance;
 559
 560         ret = str2prefix_ipv6(ip_str, &p);
 561         if (ret == 0) {
 562                 vty_out(vty, "Malformed prefix\n");
 563                 return CMD_WARNING_CONFIG_FAILED;
 564         }
 565
 566         rn = route_node_lookup(o->distance_table, (struct prefix *)&p);
 567         if (!rn) {
 568                 vty_out(vty, "Cant't find specified prefix\n");
 569                 return CMD_WARNING_CONFIG_FAILED;
 570         }
 571
 572         odistance = rn->info;
 573
 574         if (odistance->access_list)
 575                 free(odistance->access_list);
 576         ospf6_distance_free(odistance);
 577
 578         rn->info = NULL;
 579         route_unlock_node(rn);
 580         route_unlock_node(rn);
 581
 582         return CMD_SUCCESS;
 583 }
 584
 585 void ospf6_distance_reset(struct ospf6 *o)
 586 {
 587         struct route_node *rn;
 588         struct ospf6_distance *odistance;
 589
 590         for (rn = route_top(o->distance_table); rn; rn = route_next(rn))
 591                 if ((odistance = rn->info) != NULL) {
 592                         if (odistance->access_list)
 593                                 free(odistance->access_list);
 594                         ospf6_distance_free(odistance);
 595                         rn->info = NULL;
 596                         route_unlock_node(rn);
 597                 }
 598 }
 599
 600 u_char ospf6_distance_apply(struct prefix_ipv6 *p, struct ospf6_route * or)
 601 {
 602         struct ospf6 *o;
 603
 604         o = ospf6;
 605         if (o == NULL)
 606                 return 0;
 607
 608         if (o->distance_intra)
 609                 if (or->path.type == OSPF6_PATH_TYPE_INTRA)
 610                         return o->distance_intra;
 611
 612         if (o->distance_inter)
 613                 if (or->path.type == OSPF6_PATH_TYPE_INTER)
 614                         return o->distance_inter;
 615
 616         if (o->distance_external)
 617                 if (or->path.type == OSPF6_PATH_TYPE_EXTERNAL1 ||
 618                     or->path.type == OSPF6_PATH_TYPE_EXTERNAL2)
 619                         return o->distance_external;
 620
 621         if (o->distance_all)
 622                 return o->distance_all;
 623
 624         return 0;
 625 }
 626
 627 static void ospf6_zebra_connected(struct zclient *zclient)
 628 {
 629         /* Send the client registration */
 630         bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER);
 631
 632         zclient_send_reg_requests(zclient, VRF_DEFAULT);
 633 }
 634
 635 void ospf6_zebra_init(struct thread_master *master)
 636 {
 637         /* Allocate zebra structure. */
 638         zclient = zclient_new(master);
 639         zclient_init(zclient, ZEBRA_ROUTE_OSPF6, 0);
 640         zclient->zebra_connected = ospf6_zebra_connected;
 641         zclient->router_id_update = ospf6_router_id_update_zebra;
 642         zclient->interface_add = ospf6_zebra_if_add;
 643         zclient->interface_delete = ospf6_zebra_if_del;
 644         zclient->interface_up = ospf6_zebra_if_state_update;
 645         zclient->interface_down = ospf6_zebra_if_state_update;
 646         zclient->interface_address_add = ospf6_zebra_if_address_update_add;
 647         zclient->interface_address_delete =
 648                 ospf6_zebra_if_address_update_delete;
 649         zclient->redistribute_route_ipv4_add = NULL;
 650         zclient->redistribute_route_ipv4_del = NULL;
 651         zclient->redistribute_route_ipv6_add = ospf6_zebra_read_ipv6;
 652         zclient->redistribute_route_ipv6_del = ospf6_zebra_read_ipv6;
 653
 654         /* Install command element for zebra node. */
 655         install_element(VIEW_NODE, &show_ospf6_zebra_cmd);
 656 }
 657
 658 /* Debug */
 659
 660 DEFUN (debug_ospf6_zebra_sendrecv,
 661        debug_ospf6_zebra_sendrecv_cmd,
 662        "debug ospf6 zebra [<send|recv>]",
 663        DEBUG_STR
 664        OSPF6_STR
 665        "Debug connection between zebra\n"
 666        "Debug Sending zebra\n"
 667        "Debug Receiving zebra\n"
 668       )
 669 {
 670         int idx_send_recv = 3;
 671         unsigned char level = 0;
 672
 673         if (argc == 4) {
 674                 if (strmatch(argv[idx_send_recv]->text, "send"))
 675                         level = OSPF6_DEBUG_ZEBRA_SEND;
 676                 else if (strmatch(argv[idx_send_recv]->text, "recv"))
 677                         level = OSPF6_DEBUG_ZEBRA_RECV;
 678         } else
 679                 level = OSPF6_DEBUG_ZEBRA_SEND | OSPF6_DEBUG_ZEBRA_RECV;
 680
 681         OSPF6_DEBUG_ZEBRA_ON(level);
 682         return CMD_SUCCESS;
 683 }
 684
 685 DEFUN (no_debug_ospf6_zebra_sendrecv,
 686        no_debug_ospf6_zebra_sendrecv_cmd,
 687        "no debug ospf6 zebra [<send|recv>]",
 688        NO_STR
 689        DEBUG_STR
 690        OSPF6_STR
 691        "Debug connection between zebra\n"
 692        "Debug Sending zebra\n"
 693        "Debug Receiving zebra\n"
 694       )
 695 {
 696         int idx_send_recv = 4;
 697         unsigned char level = 0;
 698
 699         if (argc == 5) {
 700                 if (strmatch(argv[idx_send_recv]->text, "send"))
 701                         level = OSPF6_DEBUG_ZEBRA_SEND;
 702                 else if (strmatch(argv[idx_send_recv]->text, "recv"))
 703                         level = OSPF6_DEBUG_ZEBRA_RECV;
 704         } else
 705                 level = OSPF6_DEBUG_ZEBRA_SEND | OSPF6_DEBUG_ZEBRA_RECV;
 706
 707         OSPF6_DEBUG_ZEBRA_OFF(level);
 708         return CMD_SUCCESS;
 709 }
 710
 711
 712 int config_write_ospf6_debug_zebra(struct vty *vty)
 713 {
 714         if (IS_OSPF6_DEBUG_ZEBRA(SEND) && IS_OSPF6_DEBUG_ZEBRA(RECV))
 715                 vty_out(vty, "debug ospf6 zebra\n");
 716         else {
 717                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 718                         vty_out(vty, "debug ospf6 zebra send\n");
 719                 if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 720                         vty_out(vty, "debug ospf6 zebra recv\n");
 721         }
 722         return 0;
 723 }
 724
 725 void install_element_ospf6_debug_zebra(void)
 726 {
 727         install_element(ENABLE_NODE, &debug_ospf6_zebra_sendrecv_cmd);
 728         install_element(ENABLE_NODE, &no_debug_ospf6_zebra_sendrecv_cmd);
 729         install_element(CONFIG_NODE, &debug_ospf6_zebra_sendrecv_cmd);
 730         install_element(CONFIG_NODE, &no_debug_ospf6_zebra_sendrecv_cmd);
 731 }