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