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
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include "log.h"
  25 #include "vty.h"
  26 #include "command.h"
  27 #include "prefix.h"
  28 #include "stream.h"
  29 #include "zclient.h"
  30 #include "memory.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 unsigned char conf_debug_ospf6_zebra = 0;
  43
  44 /* information about zebra. */
  45 struct zclient *zclient = NULL;
  46
  47 struct in_addr router_id_zebra;
  48
  49 /* Router-id update message from zebra. */
  50 static int
  51 ospf6_router_id_update_zebra (int command, struct zclient *zclient,
  52                               zebra_size_t length)
  53 {
  54   struct prefix router_id;
  55   struct ospf6 *o = ospf6;
  56
  57   zebra_router_id_update_read(zclient->ibuf,&router_id);
  58   router_id_zebra = router_id.u.prefix4;
  59
  60   if (o == NULL)
  61     return 0;
  62
  63   if (o->router_id  == 0)
  64     o->router_id = (u_int32_t) router_id_zebra.s_addr;
  65
  66   return 0;
  67 }
  68
  69 /* redistribute function */
  70 void
  71 ospf6_zebra_redistribute (int type)
  72 {
  73   if (zclient->redist[type])
  74     return;
  75   zclient->redist[type] = 1;
  76   if (zclient->sock > 0)
  77     zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient, type);
  78 }
  79
  80 void
  81 ospf6_zebra_no_redistribute (int type)
  82 {
  83   if (! zclient->redist[type])
  84     return;
  85   zclient->redist[type] = 0;
  86   if (zclient->sock > 0)
  87     zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient, type);
  88 }
  89
  90 /* Inteface addition message from zebra. */
  91 static int
  92 ospf6_zebra_if_add (int command, struct zclient *zclient, zebra_size_t length)
  93 {
  94   struct interface *ifp;
  95
  96   ifp = zebra_interface_add_read (zclient->ibuf);
  97   if (IS_OSPF6_DEBUG_ZEBRA (RECV))
  98     zlog_debug ("Zebra Interface add: %s index %d mtu %d",
  99                 ifp->name, ifp->ifindex, ifp->mtu6);
 100   ospf6_interface_if_add (ifp);
 101   return 0;
 102 }
 103
 104 static int
 105 ospf6_zebra_if_del (int command, struct zclient *zclient, zebra_size_t length)
 106 {
 107   struct interface *ifp;
 108
 109   if (!(ifp = zebra_interface_state_read(zclient->ibuf)))
 110     return 0;
 111
 112   if (if_is_up (ifp))
 113     zlog_warn ("Zebra: got delete of %s, but interface is still up", ifp->name);
 114
 115   if (IS_OSPF6_DEBUG_ZEBRA (RECV))
 116     zlog_debug ("Zebra Interface delete: %s index %d mtu %d",
 117                 ifp->name, ifp->ifindex, ifp->mtu6);
 118
 119 #if 0
 120   /* Why is this commented out? */
 121   ospf6_interface_if_del (ifp);
 122 #endif /*0*/
 123
 124   ifp->ifindex = IFINDEX_INTERNAL;
 125   return 0;
 126 }
 127
 128 static int
 129 ospf6_zebra_if_state_update (int command, struct zclient *zclient,
 130                              zebra_size_t length)
 131 {
 132   struct interface *ifp;
 133
 134   ifp = zebra_interface_state_read (zclient->ibuf);
 135   if (ifp == NULL)
 136     return 0;
 137
 138   if (IS_OSPF6_DEBUG_ZEBRA (RECV))
 139     zlog_debug ("Zebra Interface state change: "
 140                 "%s index %d flags %llx metric %d mtu %d",
 141                 ifp->name, ifp->ifindex, (unsigned long long)ifp->flags,
 142                 ifp->metric, ifp->mtu6);
 143
 144   ospf6_interface_state_update (ifp);
 145   return 0;
 146 }
 147
 148 static int
 149 ospf6_zebra_if_address_update_add (int command, struct zclient *zclient,
 150                                    zebra_size_t length)
 151 {
 152   struct connected *c;
 153   char buf[128];
 154
 155   c = zebra_interface_address_read (ZEBRA_INTERFACE_ADDRESS_ADD, zclient->ibuf);
 156   if (c == NULL)
 157     return 0;
 158
 159   if (IS_OSPF6_DEBUG_ZEBRA (RECV))
 160     zlog_debug ("Zebra Interface address add: %s %5s %s/%d",
 161                 c->ifp->name, prefix_family_str (c->address),
 162                 inet_ntop (c->address->family, &c->address->u.prefix,
 163                            buf, sizeof (buf)), c->address->prefixlen);
 164
 165   if (c->address->family == AF_INET6)
 166     ospf6_interface_connected_route_update (c->ifp);
 167
 168   return 0;
 169 }
 170
 171 static int
 172 ospf6_zebra_if_address_update_delete (int command, struct zclient *zclient,
 173                                zebra_size_t length)
 174 {
 175   struct connected *c;
 176   char buf[128];
 177
 178   c = zebra_interface_address_read (ZEBRA_INTERFACE_ADDRESS_DELETE, zclient->ibuf);
 179   if (c == NULL)
 180     return 0;
 181
 182   if (IS_OSPF6_DEBUG_ZEBRA (RECV))
 183     zlog_debug ("Zebra Interface address delete: %s %5s %s/%d",
 184                 c->ifp->name, prefix_family_str (c->address),
 185                 inet_ntop (c->address->family, &c->address->u.prefix,
 186                            buf, sizeof (buf)), c->address->prefixlen);
 187
 188   if (c->address->family == AF_INET6)
 189     ospf6_interface_connected_route_update (c->ifp);
 190
 191   return 0;
 192 }
 193
 194 static int
 195 ospf6_zebra_read_ipv6 (int command, struct zclient *zclient,
 196                        zebra_size_t length)
 197 {
 198   struct stream *s;
 199   struct zapi_ipv6 api;
 200   unsigned long ifindex;
 201   struct prefix_ipv6 p;
 202   struct in6_addr *nexthop;
 203
 204   s = zclient->ibuf;
 205   ifindex = 0;
 206   nexthop = NULL;
 207   memset (&api, 0, sizeof (api));
 208
 209   /* Type, flags, message. */
 210   api.type = stream_getc (s);
 211   api.flags = stream_getc (s);
 212   api.message = stream_getc (s);
 213
 214   /* IPv6 prefix. */
 215   memset (&p, 0, sizeof (struct prefix_ipv6));
 216   p.family = AF_INET6;
 217   p.prefixlen = stream_getc (s);
 218   stream_get (&p.prefix, s, PSIZE (p.prefixlen));
 219
 220   /* Nexthop, ifindex, distance, metric. */
 221   if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP))
 222     {
 223       api.nexthop_num = stream_getc (s);
 224       nexthop = (struct in6_addr *)
 225         malloc (api.nexthop_num * sizeof (struct in6_addr));
 226       stream_get (nexthop, s, api.nexthop_num * sizeof (struct in6_addr));
 227     }
 228   if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX))
 229     {
 230       api.ifindex_num = stream_getc (s);
 231       ifindex = stream_getl (s);
 232     }
 233   if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE))
 234     api.distance = stream_getc (s);
 235   else
 236     api.distance = 0;
 237   if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC))
 238     api.metric = stream_getl (s);
 239   else
 240     api.metric = 0;
 241
 242   if (IS_OSPF6_DEBUG_ZEBRA (RECV))
 243     {
 244       char prefixstr[128], nexthopstr[128];
 245       prefix2str ((struct prefix *)&p, prefixstr, sizeof (prefixstr));
 246       if (nexthop)
 247         inet_ntop (AF_INET6, nexthop, nexthopstr, sizeof (nexthopstr));
 248       else
 249         snprintf (nexthopstr, sizeof (nexthopstr), "::");
 250
 251       zlog_debug ("Zebra Receive route %s: %s %s nexthop %s ifindex %ld",
 252                   (command == ZEBRA_IPV6_ROUTE_ADD ? "add" : "delete"),
 253                   zebra_route_string(api.type), prefixstr, nexthopstr, ifindex);
 254     }
 255
 256   if (command == ZEBRA_IPV6_ROUTE_ADD)
 257     ospf6_asbr_redistribute_add (api.type, ifindex, (struct prefix *) &p,
 258                                  api.nexthop_num, nexthop);
 259   else
 260     ospf6_asbr_redistribute_remove (api.type, ifindex, (struct prefix *) &p);
 261
 262   if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP))
 263     free (nexthop);
 264
 265   return 0;
 266 }
 267
 268
 269
 270 \f
 271 DEFUN (show_zebra,
 272        show_zebra_cmd,
 273        "show zebra",
 274        SHOW_STR
 275        "Zebra information\n")
 276 {
 277   int i;
 278   if (zclient == NULL)
 279     {
 280       vty_out (vty, "Not connected to zebra%s", VNL);
 281       return CMD_SUCCESS;
 282     }
 283
 284   vty_out (vty, "Zebra Infomation%s", VNL);
 285   vty_out (vty, "  enable: %d fail: %d%s",
 286            zclient->enable, zclient->fail, VNL);
 287   vty_out (vty, "  redistribute default: %d%s", zclient->redist_default,
 288            VNL);
 289   vty_out (vty, "  redistribute:");
 290   for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
 291     {
 292       if (zclient->redist[i])
 293         vty_out (vty, " %s", zebra_route_string(i));
 294     }
 295   vty_out (vty, "%s", VNL);
 296   return CMD_SUCCESS;
 297 }
 298
 299 DEFUN (router_zebra,
 300        router_zebra_cmd,
 301        "router zebra",
 302        "Enable a routing process\n"
 303        "Make connection to zebra daemon\n")
 304 {
 305   vty->node = ZEBRA_NODE;
 306   zclient->enable = 1;
 307   zclient_start (zclient);
 308   return CMD_SUCCESS;
 309 }
 310
 311 DEFUN (no_router_zebra,
 312        no_router_zebra_cmd,
 313        "no router zebra",
 314        NO_STR
 315        "Configure routing process\n"
 316        "Disable connection to zebra daemon\n")
 317 {
 318   zclient->enable = 0;
 319   zclient_stop (zclient);
 320   return CMD_SUCCESS;
 321 }
 322
 323 /* Zebra configuration write function. */
 324 static int
 325 config_write_ospf6_zebra (struct vty *vty)
 326 {
 327   if (! zclient->enable)
 328     {
 329       vty_out (vty, "no router zebra%s", VNL);
 330       vty_out (vty, "!%s", VNL);
 331     }
 332   else if (! zclient->redist[ZEBRA_ROUTE_OSPF6])
 333     {
 334       vty_out (vty, "router zebra%s", VNL);
 335       vty_out (vty, " no redistribute ospf6%s", VNL);
 336       vty_out (vty, "!%s", VNL);
 337     }
 338   return 0;
 339 }
 340
 341 /* Zebra node structure. */
 342 static struct cmd_node zebra_node =
 343 {
 344   ZEBRA_NODE,
 345   "%s(config-zebra)# ",
 346 };
 347
 348 #define ADD    0
 349 #define REM    1
 350 static void
 351 ospf6_zebra_route_update (int type, struct ospf6_route *request)
 352 {
 353   struct zapi_ipv6 api;
 354   char buf[64];
 355   int nhcount;
 356   struct in6_addr **nexthops;
 357   unsigned int *ifindexes;
 358   int i, ret = 0;
 359   struct prefix_ipv6 *dest;
 360
 361   if (IS_OSPF6_DEBUG_ZEBRA (SEND))
 362     {
 363       prefix2str (&request->prefix, buf, sizeof (buf));
 364       zlog_debug ("Send %s route: %s",
 365                   (type == REM ? "remove" : "add"), buf);
 366     }
 367
 368   if (zclient->sock < 0)
 369     {
 370       if (IS_OSPF6_DEBUG_ZEBRA (SEND))
 371         zlog_debug ("  Not connected to Zebra");
 372       return;
 373     }
 374
 375   if (request->path.origin.adv_router == ospf6->router_id &&
 376       (request->path.type == OSPF6_PATH_TYPE_EXTERNAL1 ||
 377        request->path.type == OSPF6_PATH_TYPE_EXTERNAL2))
 378     {
 379       if (IS_OSPF6_DEBUG_ZEBRA (SEND))
 380         zlog_debug ("  Ignore self-originated external route");
 381       return;
 382     }
 383
 384   /* If removing is the best path and if there's another path,
 385      treat this request as add the secondary path */
 386   if (type == REM && ospf6_route_is_best (request) &&
 387       request->next && ospf6_route_is_same (request, request->next))
 388     {
 389       if (IS_OSPF6_DEBUG_ZEBRA (SEND))
 390         zlog_debug ("  Best-path removal resulted Sencondary addition");
 391       type = ADD;
 392       request = request->next;
 393     }
 394
 395   /* Only the best path will be sent to zebra. */
 396   if (! ospf6_route_is_best (request))
 397     {
 398       /* this is not preferred best route, ignore */
 399       if (IS_OSPF6_DEBUG_ZEBRA (SEND))
 400         zlog_debug ("  Ignore non-best route");
 401       return;
 402     }
 403
 404   nhcount = 0;
 405   for (i = 0; i < OSPF6_MULTI_PATH_LIMIT; i++)
 406     if (ospf6_nexthop_is_set (&request->nexthop[i]))
 407       nhcount++;
 408
 409   if (nhcount == 0)
 410     {
 411       if (IS_OSPF6_DEBUG_ZEBRA (SEND))
 412         zlog_debug ("  No nexthop, ignore");
 413       return;
 414     }
 415
 416   /* allocate memory for nexthop_list */
 417   nexthops = XCALLOC (MTYPE_OSPF6_OTHER,
 418                       nhcount * sizeof (struct in6_addr *));
 419   if (nexthops == NULL)
 420     {
 421       zlog_warn ("Can't send route to zebra: malloc failed");
 422       return;
 423     }
 424
 425   /* allocate memory for ifindex_list */
 426   ifindexes = XCALLOC (MTYPE_OSPF6_OTHER,
 427                        nhcount * sizeof (unsigned int));
 428   if (ifindexes == NULL)
 429     {
 430       zlog_warn ("Can't send route to zebra: malloc failed");
 431       XFREE (MTYPE_OSPF6_OTHER, nexthops);
 432       return;
 433     }
 434
 435   for (i = 0; i < nhcount; i++)
 436     {
 437       if (IS_OSPF6_DEBUG_ZEBRA (SEND))
 438         {
 439           char ifname[IFNAMSIZ];
 440           inet_ntop (AF_INET6, &request->nexthop[i].address,
 441                      buf, sizeof (buf));
 442           if (!if_indextoname(request->nexthop[i].ifindex, ifname))
 443             strlcpy(ifname, "unknown", sizeof(ifname));
 444           zlog_debug ("  nexthop: %s%%%.*s(%d)", buf, IFNAMSIZ, ifname,
 445                       request->nexthop[i].ifindex);
 446         }
 447       nexthops[i] = &request->nexthop[i].address;
 448       ifindexes[i] = request->nexthop[i].ifindex;
 449     }
 450
 451   api.type = ZEBRA_ROUTE_OSPF6;
 452   api.flags = 0;
 453   api.message = 0;
 454   api.safi = SAFI_UNICAST;
 455   SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
 456   api.nexthop_num = nhcount;
 457   api.nexthop = nexthops;
 458   SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX);
 459   api.ifindex_num = nhcount;
 460   api.ifindex = ifindexes;
 461   SET_FLAG (api.message, ZAPI_MESSAGE_METRIC);
 462   api.metric = (request->path.metric_type == 2 ?
 463                 request->path.cost_e2 : request->path.cost);
 464
 465   dest = (struct prefix_ipv6 *) &request->prefix;
 466   if (type == REM)
 467     ret = zapi_ipv6_route (ZEBRA_IPV6_ROUTE_DELETE, zclient, dest, &api);
 468   else
 469     ret = zapi_ipv6_route (ZEBRA_IPV6_ROUTE_ADD, zclient, dest, &api);
 470
 471   if (ret < 0)
 472     zlog_err ("zapi_ipv6_route() %s failed: %s",
 473               (type == REM ? "delete" : "add"), safe_strerror (errno));
 474
 475   XFREE (MTYPE_OSPF6_OTHER, nexthops);
 476   XFREE (MTYPE_OSPF6_OTHER, ifindexes);
 477
 478   return;
 479 }
 480
 481 void
 482 ospf6_zebra_route_update_add (struct ospf6_route *request)
 483 {
 484   if (! zclient->redist[ZEBRA_ROUTE_OSPF6])
 485     {
 486       ospf6->route_table->hook_add = NULL;
 487       ospf6->route_table->hook_remove = NULL;
 488       return;
 489     }
 490   ospf6_zebra_route_update (ADD, request);
 491 }
 492
 493 void
 494 ospf6_zebra_route_update_remove (struct ospf6_route *request)
 495 {
 496   if (! zclient->redist[ZEBRA_ROUTE_OSPF6])
 497     {
 498       ospf6->route_table->hook_add = NULL;
 499       ospf6->route_table->hook_remove = NULL;
 500       return;
 501     }
 502   ospf6_zebra_route_update (REM, request);
 503 }
 504
 505 DEFUN (redistribute_ospf6,
 506        redistribute_ospf6_cmd,
 507        "redistribute ospf6",
 508        "Redistribute control\n"
 509        "OSPF6 route\n")
 510 {
 511   struct ospf6_route *route;
 512
 513   if (zclient->redist[ZEBRA_ROUTE_OSPF6])
 514     return CMD_SUCCESS;
 515
 516   zclient->redist[ZEBRA_ROUTE_OSPF6] = 1;
 517
 518   if (ospf6 == NULL)
 519     return CMD_SUCCESS;
 520
 521   /* send ospf6 route to zebra route table */
 522   for (route = ospf6_route_head (ospf6->route_table); route;
 523        route = ospf6_route_next (route))
 524     ospf6_zebra_route_update_add (route);
 525
 526   ospf6->route_table->hook_add = ospf6_zebra_route_update_add;
 527   ospf6->route_table->hook_remove = ospf6_zebra_route_update_remove;
 528
 529   return CMD_SUCCESS;
 530 }
 531
 532 DEFUN (no_redistribute_ospf6,
 533        no_redistribute_ospf6_cmd,
 534        "no redistribute ospf6",
 535        NO_STR
 536        "Redistribute control\n"
 537        "OSPF6 route\n")
 538 {
 539   struct ospf6_route *route;
 540
 541   if (! zclient->redist[ZEBRA_ROUTE_OSPF6])
 542     return CMD_SUCCESS;
 543
 544   zclient->redist[ZEBRA_ROUTE_OSPF6] = 0;
 545
 546   if (ospf6 == NULL)
 547     return CMD_SUCCESS;
 548
 549   ospf6->route_table->hook_add = NULL;
 550   ospf6->route_table->hook_remove = NULL;
 551
 552   /* withdraw ospf6 route from zebra route table */
 553   for (route = ospf6_route_head (ospf6->route_table); route;
 554        route = ospf6_route_next (route))
 555     ospf6_zebra_route_update_remove (route);
 556
 557   return CMD_SUCCESS;
 558 }
 559
 560 void
 561 ospf6_zebra_init (void)
 562 {
 563   /* Allocate zebra structure. */
 564   zclient = zclient_new ();
 565   zclient_init (zclient, ZEBRA_ROUTE_OSPF6);
 566   zclient->router_id_update = ospf6_router_id_update_zebra;
 567   zclient->interface_add = ospf6_zebra_if_add;
 568   zclient->interface_delete = ospf6_zebra_if_del;
 569   zclient->interface_up = ospf6_zebra_if_state_update;
 570   zclient->interface_down = ospf6_zebra_if_state_update;
 571   zclient->interface_address_add = ospf6_zebra_if_address_update_add;
 572   zclient->interface_address_delete = ospf6_zebra_if_address_update_delete;
 573   zclient->ipv4_route_add = NULL;
 574   zclient->ipv4_route_delete = NULL;
 575   zclient->ipv6_route_add = ospf6_zebra_read_ipv6;
 576   zclient->ipv6_route_delete = ospf6_zebra_read_ipv6;
 577
 578   /* redistribute connected route by default */
 579   /* ospf6_zebra_redistribute (ZEBRA_ROUTE_CONNECT); */
 580
 581   /* Install zebra node. */
 582   install_node (&zebra_node, config_write_ospf6_zebra);
 583
 584   /* Install command element for zebra node. */
 585   install_element (VIEW_NODE, &show_zebra_cmd);
 586   install_element (ENABLE_NODE, &show_zebra_cmd);
 587   install_element (CONFIG_NODE, &router_zebra_cmd);
 588   install_element (CONFIG_NODE, &no_router_zebra_cmd);
 589
 590   install_default (ZEBRA_NODE);
 591   install_element (ZEBRA_NODE, &redistribute_ospf6_cmd);
 592   install_element (ZEBRA_NODE, &no_redistribute_ospf6_cmd);
 593
 594   return;
 595 }
 596
 597 /* Debug */
 598 \f
 599 DEFUN (debug_ospf6_zebra_sendrecv,
 600        debug_ospf6_zebra_sendrecv_cmd,
 601        "debug ospf6 zebra (send|recv)",
 602        DEBUG_STR
 603        OSPF6_STR
 604        "Debug connection between zebra\n"
 605        "Debug Sending zebra\n"
 606        "Debug Receiving zebra\n"
 607       )
 608 {
 609   unsigned char level = 0;
 610
 611   if (argc)
 612     {
 613       if (! strncmp (argv[0], "s", 1))
 614         level = OSPF6_DEBUG_ZEBRA_SEND;
 615       else if (! strncmp (argv[0], "r", 1))
 616         level = OSPF6_DEBUG_ZEBRA_RECV;
 617     }
 618   else
 619     level = OSPF6_DEBUG_ZEBRA_SEND | OSPF6_DEBUG_ZEBRA_RECV;
 620
 621   OSPF6_DEBUG_ZEBRA_ON (level);
 622   return CMD_SUCCESS;
 623 }
 624
 625 ALIAS (debug_ospf6_zebra_sendrecv,
 626        debug_ospf6_zebra_cmd,
 627        "debug ospf6 zebra",
 628        DEBUG_STR
 629        OSPF6_STR
 630        "Debug connection between zebra\n"
 631       )
 632
 633
 634 DEFUN (no_debug_ospf6_zebra_sendrecv,
 635        no_debug_ospf6_zebra_sendrecv_cmd,
 636        "no debug ospf6 zebra (send|recv)",
 637        NO_STR
 638        DEBUG_STR
 639        OSPF6_STR
 640        "Debug connection between zebra\n"
 641        "Debug Sending zebra\n"
 642        "Debug Receiving zebra\n"
 643       )
 644 {
 645   unsigned char level = 0;
 646
 647   if (argc)
 648     {
 649       if (! strncmp (argv[0], "s", 1))
 650         level = OSPF6_DEBUG_ZEBRA_SEND;
 651       else if (! strncmp (argv[0], "r", 1))
 652         level = OSPF6_DEBUG_ZEBRA_RECV;
 653     }
 654   else
 655     level = OSPF6_DEBUG_ZEBRA_SEND | OSPF6_DEBUG_ZEBRA_RECV;
 656
 657   OSPF6_DEBUG_ZEBRA_OFF (level);
 658   return CMD_SUCCESS;
 659 }
 660
 661 ALIAS (no_debug_ospf6_zebra_sendrecv,
 662        no_debug_ospf6_zebra_cmd,
 663        "no debug ospf6 zebra",
 664        NO_STR
 665        DEBUG_STR
 666        OSPF6_STR
 667        "Debug connection between zebra\n"
 668       )
 669
 670 int
 671 config_write_ospf6_debug_zebra (struct vty *vty)
 672 {
 673   if (IS_OSPF6_DEBUG_ZEBRA (SEND) && IS_OSPF6_DEBUG_ZEBRA (RECV))
 674     vty_out (vty, "debug ospf6 zebra%s", VNL);
 675   else
 676     {
 677       if (IS_OSPF6_DEBUG_ZEBRA (SEND))
 678         vty_out (vty, "debug ospf6 zebra send%s", VNL);
 679       if (IS_OSPF6_DEBUG_ZEBRA (RECV))
 680         vty_out (vty, "debug ospf6 zebra recv%s", VNL);
 681     }
 682   return 0;
 683 }
 684
 685 void
 686 install_element_ospf6_debug_zebra (void)
 687 {
 688   install_element (ENABLE_NODE, &debug_ospf6_zebra_cmd);
 689   install_element (ENABLE_NODE, &no_debug_ospf6_zebra_cmd);
 690   install_element (ENABLE_NODE, &debug_ospf6_zebra_sendrecv_cmd);
 691   install_element (ENABLE_NODE, &no_debug_ospf6_zebra_sendrecv_cmd);
 692   install_element (CONFIG_NODE, &debug_ospf6_zebra_cmd);
 693   install_element (CONFIG_NODE, &no_debug_ospf6_zebra_cmd);
 694   install_element (CONFIG_NODE, &debug_ospf6_zebra_sendrecv_cmd);
 695   install_element (CONFIG_NODE, &no_debug_ospf6_zebra_sendrecv_cmd);
 696 }
 697
 698