ospf6d/ospf6_snmp.c

   1 /* OSPFv3 SNMP support
   2  * Copyright (C) 2004 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 #ifdef HAVE_SNMP
  25
  26 #ifdef HAVE_NETSNMP
  27 #include <net-snmp/net-snmp-config.h>
  28 #include <net-snmp/net-snmp-includes.h>
  29 #else
  30 #include <asn1.h>
  31 #include <snmp.h>
  32 #include <snmp_impl.h>
  33 #endif
  34
  35 #include "log.h"
  36 #include "vty.h"
  37 #include "linklist.h"
  38 #include "smux.h"
  39
  40 #include "ospf6_proto.h"
  41 #include "ospf6_lsa.h"
  42 #include "ospf6_lsdb.h"
  43 #include "ospf6_route.h"
  44 #include "ospf6_top.h"
  45 #include "ospf6_area.h"
  46 #include "ospf6_interface.h"
  47 #include "ospf6_message.h"
  48 #include "ospf6_neighbor.h"
  49 #include "ospf6d.h"
  50
  51 /* OSPFv3-MIB */
  52 #define OSPFv3MIB 1,3,6,1,3,102
  53
  54 /* OSPFv3 MIB General Group values. */
  55 #define OSPFv3ROUTERID                   1
  56 #define OSPFv3ADMINSTAT                  2
  57 #define OSPFv3VERSIONNUMBER              3
  58 #define OSPFv3AREABDRRTRSTATUS           4
  59 #define OSPFv3ASBDRRTRSTATUS             5
  60 #define OSPFv3ASSCOPELSACOUNT            6
  61 #define OSPFv3ASSCOPELSACHECKSUMSUM      7
  62 #define OSPFv3ORIGINATENEWLSAS           8
  63 #define OSPFv3RXNEWLSAS                  9
  64 #define OSPFv3EXTLSACOUNT               10
  65 #define OSPFv3EXTAREALSDBLIMIT          11
  66 #define OSPFv3MULTICASTEXTENSIONS       12
  67 #define OSPFv3EXITOVERFLOWINTERVAL      13
  68 #define OSPFv3DEMANDEXTENSIONS          14
  69 #define OSPFv3TRAFFICENGINEERINGSUPPORT 15
  70 #define OSPFv3REFERENCEBANDWIDTH        16
  71 #define OSPFv3RESTARTSUPPORT            17
  72 #define OSPFv3RESTARTINTERVAL           18
  73 #define OSPFv3RESTARTSTATUS             19
  74 #define OSPFv3RESTARTAGE                20
  75 #define OSPFv3RESTARTEXITREASON         21
  76
  77 /* OSPFv3 MIB Area Table values. */
  78 #define OSPFv3AREAID                     1
  79 #define OSPFv3IMPORTASEXTERN             2
  80 #define OSPFv3AREASPFRUNS                3
  81 #define OSPFv3AREABDRRTRCOUNT            4
  82 #define OSPFv3AREAASBDRRTRCOUNT          5
  83 #define OSPFv3AREASCOPELSACOUNT          6
  84 #define OSPFv3AREASCOPELSACKSUMSUM       7
  85 #define OSPFv3AREASUMMARY                8
  86 #define OSPFv3AREASTATUS                 9
  87 #define OSPFv3STUBMETRIC                10
  88 #define OSPFv3AREANSSATRANSLATORROLE    11
  89 #define OSPFv3AREANSSATRANSLATORSTATE   12
  90 #define OSPFv3AREANSSATRANSLATORSTABILITYINTERVAL    13
  91 #define OSPFv3AREANSSATRANSLATOREVENTS  14
  92 #define OSPFv3AREASTUBMETRICTYPE        15
  93
  94 /* OSPFv3 MIB Area Lsdb Table values. */
  95 #define OSPFv3AREALSDBAREAID             1
  96 #define OSPFv3AREALSDBTYPE               2
  97 #define OSPFv3AREALSDBROUTERID           3
  98 #define OSPFv3AREALSDBLSID               4
  99 #define OSPFv3AREALSDBSEQUENCE           5
 100 #define OSPFv3AREALSDBAGE                6
 101 #define OSPFv3AREALSDBCHECKSUM           7
 102 #define OSPFv3AREALSDBADVERTISEMENT      8
 103 #define OSPFv3AREALSDBTYPEKNOWN          9
 104
 105 /* SYNTAX Status from OSPF-MIB. */
 106 #define OSPF_STATUS_ENABLED  1
 107 #define OSPF_STATUS_DISABLED 2
 108
 109 /* SNMP value hack. */
 110 #define COUNTER     ASN_COUNTER
 111 #define INTEGER     ASN_INTEGER
 112 #define GAUGE       ASN_GAUGE
 113 #define TIMETICKS   ASN_TIMETICKS
 114 #define IPADDRESS   ASN_IPADDRESS
 115 #define STRING      ASN_OCTET_STR
 116
 117 /* For return values e.g. SNMP_INTEGER macro */
 118 SNMP_LOCAL_VARIABLES
 119
 120 static struct in_addr tmp;
 121 #define INT32_INADDR(x) \
 122   (tmp.s_addr = (x), tmp)
 123
 124 /* OSPFv3-MIB instances. */
 125 oid ospfv3_oid [] = { OSPFv3MIB };
 126
 127 /* empty ID 0.0.0.0 e.g. empty router-id */
 128 static struct in_addr ospf6_empty_id = {0};
 129
 130 /* Hook functions. */
 131 static u_char *ospfv3GeneralGroup ();
 132 static u_char *ospfv3AreaEntry ();
 133 static u_char *ospfv3AreaLsdbEntry ();
 134
 135 struct variable ospfv3_variables[] =
 136 {
 137   /* OSPF general variables */
 138   {OSPFv3ROUTERID,              IPADDRESS, RWRITE, ospfv3GeneralGroup,
 139    3, {1, 1, 1}},
 140   {OSPFv3ADMINSTAT,             INTEGER,   RWRITE, ospfv3GeneralGroup,
 141    3, {1, 1, 2}},
 142   {OSPFv3VERSIONNUMBER,         INTEGER,   RONLY,  ospfv3GeneralGroup,
 143    3, {1, 1, 3}},
 144   {OSPFv3AREABDRRTRSTATUS,      INTEGER,   RONLY,  ospfv3GeneralGroup,
 145    3, {1, 1, 4}},
 146   {OSPFv3ASBDRRTRSTATUS,        INTEGER,   RWRITE, ospfv3GeneralGroup,
 147    3, {1, 1, 5}},
 148   {OSPFv3ASSCOPELSACOUNT,       GAUGE,     RONLY,  ospfv3GeneralGroup,
 149    3, {1, 1, 6}},
 150   {OSPFv3ASSCOPELSACHECKSUMSUM, INTEGER,   RONLY,  ospfv3GeneralGroup,
 151    3, {1, 1, 7}},
 152   {OSPFv3ORIGINATENEWLSAS,      COUNTER,   RONLY,  ospfv3GeneralGroup,
 153    3, {1, 1, 8}},
 154   {OSPFv3RXNEWLSAS,             COUNTER,   RONLY,  ospfv3GeneralGroup,
 155    3, {1, 1, 9}},
 156   {OSPFv3EXTLSACOUNT,           GAUGE,     RONLY,  ospfv3GeneralGroup,
 157    3, {1, 1, 10}},
 158   {OSPFv3EXTAREALSDBLIMIT,      INTEGER,   RWRITE, ospfv3GeneralGroup,
 159    3, {1, 1, 11}},
 160   {OSPFv3MULTICASTEXTENSIONS,   INTEGER,   RWRITE, ospfv3GeneralGroup,
 161    3, {1, 1, 12}},
 162   {OSPFv3EXITOVERFLOWINTERVAL,  INTEGER,   RWRITE, ospfv3GeneralGroup,
 163    3, {1, 1, 13}},
 164   {OSPFv3DEMANDEXTENSIONS,      INTEGER,   RWRITE, ospfv3GeneralGroup,
 165    3, {1, 1, 14}},
 166   {OSPFv3TRAFFICENGINEERINGSUPPORT, INTEGER, RWRITE, ospfv3GeneralGroup,
 167    3, {1, 1, 15}},
 168   {OSPFv3REFERENCEBANDWIDTH,    INTEGER, RWRITE, ospfv3GeneralGroup,
 169    3, {1, 1, 16}},
 170   {OSPFv3RESTARTSUPPORT,        INTEGER, RWRITE, ospfv3GeneralGroup,
 171    3, {1, 1, 17}},
 172   {OSPFv3RESTARTINTERVAL,       INTEGER, RWRITE, ospfv3GeneralGroup,
 173    3, {1, 1, 18}},
 174   {OSPFv3RESTARTSTATUS,         INTEGER, RONLY,  ospfv3GeneralGroup,
 175    3, {1, 1, 19}},
 176   {OSPFv3RESTARTAGE,            INTEGER, RONLY,  ospfv3GeneralGroup,
 177    3, {1, 1, 20}},
 178   {OSPFv3RESTARTEXITREASON,     INTEGER, RONLY,  ospfv3GeneralGroup,
 179    3, {1, 1, 21}},
 180
 181   /* OSPFv3 Area Data Structure */
 182   {OSPFv3AREAID,                IPADDRESS, RONLY,  ospfv3AreaEntry,
 183    4, {1, 2, 1, 1}},
 184   {OSPFv3IMPORTASEXTERN,        INTEGER,   RWRITE, ospfv3AreaEntry,
 185    4, {1, 2, 1, 2}},
 186   {OSPFv3AREASPFRUNS,           COUNTER,   RONLY,  ospfv3AreaEntry,
 187    4, {1, 2, 1, 3}},
 188   {OSPFv3AREABDRRTRCOUNT,       GAUGE,     RONLY,  ospfv3AreaEntry,
 189    4, {1, 2, 1, 4}},
 190   {OSPFv3AREAASBDRRTRCOUNT,     GAUGE,     RONLY,  ospfv3AreaEntry,
 191    4, {1, 2, 1, 5}},
 192   {OSPFv3AREASCOPELSACOUNT,     GAUGE,     RONLY,  ospfv3AreaEntry,
 193    4, {1, 2, 1, 6}},
 194   {OSPFv3AREASCOPELSACKSUMSUM,  INTEGER,   RONLY,  ospfv3AreaEntry,
 195    4, {1, 2, 1, 7}},
 196   {OSPFv3AREASUMMARY,           INTEGER,   RWRITE, ospfv3AreaEntry,
 197    4, {1, 2, 1, 8}},
 198   {OSPFv3AREASTATUS,            INTEGER,   RWRITE, ospfv3AreaEntry,
 199    4, {1, 2, 1, 9}},
 200   {OSPFv3STUBMETRIC,            INTEGER,   RWRITE, ospfv3AreaEntry,
 201    4, {1, 2, 1, 10}},
 202   {OSPFv3AREANSSATRANSLATORROLE, INTEGER,  RWRITE, ospfv3AreaEntry,
 203    4, {1, 2, 1, 11}},
 204   {OSPFv3AREANSSATRANSLATORSTATE, INTEGER, RONLY,  ospfv3AreaEntry,
 205    4, {1, 2, 1, 12}},
 206   {OSPFv3AREANSSATRANSLATORSTABILITYINTERVAL, INTEGER, RWRITE, ospfv3AreaEntry,
 207    4, {1, 2, 1, 13}},
 208   {OSPFv3AREANSSATRANSLATOREVENTS, COUNTER, RONLY, ospfv3AreaEntry,
 209    4, {1, 2, 1, 14}},
 210   {OSPFv3AREASTUBMETRICTYPE,    INTEGER, RWRITE, ospfv3AreaEntry,
 211    4, {1, 2, 1, 15}},
 212
 213   {OSPFv3AREALSDBAREAID,        IPADDRESS, RONLY,  ospfv3AreaLsdbEntry,
 214    4, {1, 4, 1, 1}},
 215   {OSPFv3AREALSDBTYPE,          GAUGE,     RONLY,  ospfv3AreaLsdbEntry,
 216    4, {1, 4, 1, 2}},
 217   {OSPFv3AREALSDBROUTERID,      IPADDRESS, RONLY,  ospfv3AreaLsdbEntry,
 218    4, {1, 4, 1, 3}},
 219   {OSPFv3AREALSDBLSID,          IPADDRESS, RONLY,  ospfv3AreaLsdbEntry,
 220    4, {1, 4, 1, 4}},
 221   {OSPFv3AREALSDBSEQUENCE,      INTEGER,   RONLY,  ospfv3AreaLsdbEntry,
 222    4, {1, 4, 1, 5}},
 223   {OSPFv3AREALSDBAGE,           INTEGER,   RONLY,  ospfv3AreaLsdbEntry,
 224    4, {1, 4, 1, 6}},
 225   {OSPFv3AREALSDBCHECKSUM,      INTEGER,   RONLY,  ospfv3AreaLsdbEntry,
 226    4, {1, 4, 1, 7}},
 227   {OSPFv3AREALSDBADVERTISEMENT, STRING,    RONLY,  ospfv3AreaLsdbEntry,
 228    4, {1, 4, 1, 8}},
 229   {OSPFv3AREALSDBTYPEKNOWN,     INTEGER,   RONLY,  ospfv3AreaLsdbEntry,
 230    4, {1, 4, 1, 9}},
 231
 232 };
 233
 234 static u_char *
 235 ospfv3GeneralGroup (struct variable *v, oid *name, size_t *length,
 236                     int exact, size_t *var_len, WriteMethod **write_method)
 237 {
 238   /* Check whether the instance identifier is valid */
 239   if (smux_header_generic (v, name, length, exact, var_len, write_method)
 240       == MATCH_FAILED)
 241     return NULL;
 242
 243   /* Return the current value of the variable */
 244   switch (v->magic)
 245     {
 246     case OSPFv3ROUTERID:                  /* 1*/
 247       /* Router-ID of this OSPF instance. */
 248       if (ospf6)
 249         return SNMP_IPADDRESS (INT32_INADDR (ospf6->router_id));
 250       else
 251         return SNMP_IPADDRESS (ospf6_empty_id);
 252       break;
 253     case OSPFv3ADMINSTAT:                 /* 2*/
 254       break;
 255     case OSPFv3VERSIONNUMBER:             /* 3*/
 256       break;
 257     case OSPFv3AREABDRRTRSTATUS:          /* 4*/
 258       break;
 259     case OSPFv3ASBDRRTRSTATUS:            /* 5*/
 260       break;
 261     case OSPFv3ASSCOPELSACOUNT:           /* 6*/
 262       break;
 263     case OSPFv3ASSCOPELSACHECKSUMSUM:     /* 7*/
 264       break;
 265     case OSPFv3ORIGINATENEWLSAS:          /* 8*/
 266       break;
 267     case OSPFv3RXNEWLSAS:                 /* 9*/
 268       break;
 269     case OSPFv3EXTLSACOUNT:               /*10*/
 270       break;
 271     case OSPFv3EXTAREALSDBLIMIT:          /*11*/
 272       break;
 273     case OSPFv3MULTICASTEXTENSIONS:       /*12*/
 274       break;
 275     case OSPFv3EXITOVERFLOWINTERVAL:      /*13*/
 276       break;
 277     case OSPFv3DEMANDEXTENSIONS:          /*14*/
 278       break;
 279     case OSPFv3TRAFFICENGINEERINGSUPPORT: /*15*/
 280       break;
 281     case OSPFv3REFERENCEBANDWIDTH:        /*16*/
 282       break;
 283     case OSPFv3RESTARTSUPPORT:            /*17*/
 284       break;
 285     case OSPFv3RESTARTINTERVAL:           /*18*/
 286       break;
 287     case OSPFv3RESTARTSTATUS:             /*19*/
 288       break;
 289     case OSPFv3RESTARTAGE:                /*20*/
 290       break;
 291     case OSPFv3RESTARTEXITREASON:         /*21*/
 292       break;
 293     default:
 294       return NULL;
 295     }
 296   return NULL;
 297 }
 298
 299 static u_char *
 300 ospfv3AreaEntry (struct variable *v, oid *name, size_t *length,
 301                  int exact, size_t *var_len, WriteMethod **write_method)
 302 {
 303   struct ospf6_area *oa, *area = NULL;
 304   u_int32_t area_id = 0;
 305   struct listnode *node;
 306   unsigned int len;
 307
 308   if (ospf6 == NULL)
 309     return NULL;
 310
 311   len = *length - v->namelen;
 312   len = (len >= sizeof (u_int32_t) ? sizeof (u_int32_t) : 0);
 313   if (exact && len != sizeof (u_int32_t))
 314     return NULL;
 315   if (len)
 316     oid2in_addr (name + v->namelen, len, (struct in_addr *) &area_id);
 317
 318   zlog_debug ("SNMP access by area: %s, exact=%d len=%d length=%lu",
 319               inet_ntoa (* (struct in_addr *) &area_id),
 320               exact, len, (u_long)*length);
 321
 322   for (ALL_LIST_ELEMENTS_RO (ospf6->area_list, node, oa))
 323     {
 324       if (area == NULL)
 325         {
 326           if (len == 0) /* return first area entry */
 327             area = oa;
 328           else if (exact && ntohl (oa->area_id) == ntohl (area_id))
 329             area = oa;
 330           else if (ntohl (oa->area_id) > ntohl (area_id))
 331             area = oa;
 332         }
 333     }
 334
 335   if (area == NULL)
 336     return NULL;
 337
 338   *length = v->namelen + sizeof (u_int32_t);
 339   oid_copy_addr (name + v->namelen, (struct in_addr *) &area->area_id,
 340                  sizeof (u_int32_t));
 341
 342   zlog_debug ("SNMP found area: %s, exact=%d len=%d length=%lu",
 343               inet_ntoa (* (struct in_addr *) &area->area_id),
 344               exact, len, (u_long)*length);
 345
 346   switch (v->magic)
 347     {
 348     case OSPFv3AREAID:                   /* 1*/
 349       return SNMP_IPADDRESS (INT32_INADDR (area->area_id));
 350       break;
 351     case OSPFv3IMPORTASEXTERN:           /* 2*/
 352       return SNMP_INTEGER (ospf6->external_table->count);
 353       break;
 354     default:
 355       return NULL;
 356       break;
 357     }
 358   return NULL;
 359 }
 360
 361 static u_char *
 362 ospfv3AreaLsdbEntry (struct variable *v, oid *name, size_t *length,
 363                      int exact, size_t *var_len, WriteMethod **write_method)
 364 {
 365   struct ospf6_lsa *lsa = NULL;
 366   struct in_addr area_id;
 367   u_int16_t type;
 368   struct in_addr id;
 369   struct in_addr adv_router;
 370   int len;
 371   oid *offset;
 372   int offsetlen;
 373   char a[16], b[16], c[16];
 374   struct ospf6_area *oa;
 375   struct listnode *node;
 376
 377   memset (&area_id, 0, sizeof (struct in_addr));
 378   type = 0;
 379   memset (&id, 0, sizeof (struct in_addr));
 380   memset (&adv_router, 0, sizeof (struct in_addr));
 381
 382   /* Check OSPFv3 instance. */
 383   if (ospf6 == NULL)
 384     return NULL;
 385
 386   /* Get variable length. */
 387   offset = name + v->namelen;
 388   offsetlen = *length - v->namelen;
 389
 390 #define OSPFV3_AREA_LSDB_ENTRY_EXACT_OFFSET \
 391   (IN_ADDR_SIZE + 1 + IN_ADDR_SIZE + IN_ADDR_SIZE)
 392
 393   if (exact && offsetlen != OSPFV3_AREA_LSDB_ENTRY_EXACT_OFFSET)
 394     return NULL;
 395
 396   /* Parse area-id */
 397   len = (offsetlen < IN_ADDR_SIZE ? offsetlen : IN_ADDR_SIZE);
 398   if (len)
 399     oid2in_addr (offset, len, &area_id);
 400   offset += len;
 401   offsetlen -= len;
 402
 403   /* Parse type */
 404   len = (offsetlen < 1 ? offsetlen : 1);
 405   if (len)
 406     type = htons (*offset);
 407   offset += len;
 408   offsetlen -= len;
 409
 410   /* Parse Router-ID */
 411   len = (offsetlen < IN_ADDR_SIZE ? offsetlen : IN_ADDR_SIZE);
 412   if (len)
 413     oid2in_addr (offset, len, &adv_router);
 414   offset += len;
 415   offsetlen -= len;
 416
 417   /* Parse LS-ID */
 418   len = (offsetlen < IN_ADDR_SIZE ? offsetlen : IN_ADDR_SIZE);
 419   if (len)
 420     oid2in_addr (offset, len, &id);
 421   offset += len;
 422   offsetlen -= len;
 423
 424   inet_ntop (AF_INET, &area_id, a, sizeof (a));
 425   inet_ntop (AF_INET, &adv_router, b, sizeof (b));
 426   inet_ntop (AF_INET, &id, c, sizeof (c));
 427   zlog_debug ("SNMP access by lsdb: area=%s exact=%d length=%lu magic=%d"
 428               " type=%#x adv_router=%s id=%s",
 429               a, exact, (u_long)*length, v->magic, ntohs (type), b, c);
 430
 431   if (exact)
 432     {
 433       oa = ospf6_area_lookup (area_id.s_addr, ospf6);
 434       lsa = ospf6_lsdb_lookup (type, id.s_addr, adv_router.s_addr, oa->lsdb);
 435     }
 436   else
 437     {
 438       for (ALL_LIST_ELEMENTS_RO (ospf6->area_list, node, oa))
 439         {
 440           if (lsa)
 441             continue;
 442           if (ntohl (oa->area_id) < ntohl (area_id.s_addr))
 443             continue;
 444
 445           lsa = ospf6_lsdb_lookup_next (type, id.s_addr, adv_router.s_addr,
 446                                         oa->lsdb);
 447           if (! lsa)
 448             {
 449               type = 0;
 450               memset (&id, 0, sizeof (struct in_addr));
 451               memset (&adv_router, 0, sizeof (struct in_addr));
 452             }
 453         }
 454     }
 455
 456   if (! lsa)
 457     {
 458       zlog_debug ("SNMP respond: No LSA to return");
 459       return NULL;
 460     }
 461   oa = OSPF6_AREA (lsa->lsdb->data);
 462
 463   zlog_debug ("SNMP respond: area: %s lsa: %s", oa->name, lsa->name);
 464
 465   /* Add Index (AreaId, Type, RouterId, Lsid) */
 466   *length = v->namelen + OSPFV3_AREA_LSDB_ENTRY_EXACT_OFFSET;
 467   offset = name + v->namelen;
 468   oid_copy_addr (offset, (struct in_addr *) &oa->area_id, IN_ADDR_SIZE);
 469   offset += IN_ADDR_SIZE;
 470   *offset = ntohs (lsa->header->type);
 471   offset++;
 472   oid_copy_addr (offset, (struct in_addr *) &lsa->header->adv_router,
 473                  IN_ADDR_SIZE);
 474   offset += IN_ADDR_SIZE;
 475   oid_copy_addr (offset, (struct in_addr *) &lsa->header->id, IN_ADDR_SIZE);
 476   offset += IN_ADDR_SIZE;
 477
 478   /* Return the current value of the variable */
 479   switch (v->magic)
 480     {
 481     case OSPFv3AREALSDBAREAID:        /* 1 */
 482       area_id.s_addr = OSPF6_AREA (lsa->lsdb->data)->area_id;
 483       return SNMP_IPADDRESS (area_id);
 484       break;
 485     case OSPFv3AREALSDBTYPE:          /* 2 */
 486       return SNMP_INTEGER (ntohs (lsa->header->type));
 487       break;
 488     case OSPFv3AREALSDBROUTERID:      /* 3 */
 489       adv_router.s_addr = lsa->header->adv_router;
 490       return SNMP_IPADDRESS (adv_router);
 491       break;
 492     case OSPFv3AREALSDBLSID:          /* 4 */
 493       id.s_addr = lsa->header->id;
 494       return SNMP_IPADDRESS (id);
 495       break;
 496     case OSPFv3AREALSDBSEQUENCE:      /* 5 */
 497       return SNMP_INTEGER (lsa->header->seqnum);
 498       break;
 499     case OSPFv3AREALSDBAGE:           /* 6 */
 500       ospf6_lsa_age_current (lsa);
 501       return SNMP_INTEGER (lsa->header->age);
 502       break;
 503     case OSPFv3AREALSDBCHECKSUM:      /* 7 */
 504       return SNMP_INTEGER (lsa->header->checksum);
 505       break;
 506     case OSPFv3AREALSDBADVERTISEMENT: /* 8 */
 507       *var_len = ntohs (lsa->header->length);
 508       return (u_char *) lsa->header;
 509       break;
 510     case OSPFv3AREALSDBTYPEKNOWN:     /* 9 */
 511       return SNMP_INTEGER (OSPF6_LSA_IS_KNOWN (lsa->header->type) ?
 512                            SNMP_TRUE : SNMP_FALSE);
 513       break;
 514     default:
 515       return NULL;
 516       break;
 517     }
 518   return NULL;
 519 }
 520
 521
 522 /* Register OSPFv3-MIB. */
 523 void
 524 ospf6_snmp_init (struct thread_master *master)
 525 {
 526   smux_init (master);
 527   REGISTER_MIB ("OSPFv3MIB", ospfv3_variables, variable, ospfv3_oid);
 528 }
 529
 530 #endif /* HAVE_SNMP */
 531