ospf6_snmp.c

linux 路由软件 可支持RIP OSPF BGP等

      break;
    case OSPFv3EXTLSACOUNT:               /*10*/
      break;
    case OSPFv3EXTAREALSDBLIMIT:          /*11*/
      break;
    case OSPFv3MULTICASTEXTENSIONS:       /*12*/
      break;
    case OSPFv3EXITOVERFLOWINTERVAL:      /*13*/
      break;
    case OSPFv3DEMANDEXTENSIONS:          /*14*/
      break;
    case OSPFv3TRAFFICENGINEERINGSUPPORT: /*15*/
      break;
    case OSPFv3REFERENCEBANDWIDTH:        /*16*/
      break;
    case OSPFv3RESTARTSUPPORT:            /*17*/
      break;
    case OSPFv3RESTARTINTERVAL:           /*18*/
      break;
    case OSPFv3RESTARTSTATUS:             /*19*/
      break;
    case OSPFv3RESTARTAGE:                /*20*/
      break;
    case OSPFv3RESTARTEXITREASON:         /*21*/
      break;
    default:
      return NULL;
    }
  return NULL;
}

static u_char *
ospfv3AreaEntry (struct variable *v, oid *name, size_t *length,
                 int exact, size_t *var_len, WriteMethod **write_method)
{
  struct ospf6_area *oa, *area = NULL;
  u_int32_t area_id = 0;
  listnode node;
  int len;

  if (ospf6 == NULL)
    return NULL;

  len = *length - v->namelen;
  len = (len >= sizeof (u_int32_t) ? sizeof (u_int32_t) : 0);
  if (exact && len != sizeof (u_int32_t))
    return NULL;
  if (len)
    oid2in_addr (name + v->namelen, len, (struct in_addr *) &area_id);

  zlog_info ("SNMP access by area: %s, exact=%d len=%d length=%d",
             inet_ntoa (* (struct in_addr *) &area_id),
             exact, len, *length);

  for (node = listhead (ospf6->area_list); node; nextnode (node))
    {
      oa = (struct ospf6_area *) getdata (node);
      if (area == NULL)
        {
          if (len == 0) /* return first area entry */
            area = oa;
          else if (exact && ntohl (oa->area_id) == ntohl (area_id))
            area = oa;
          else if (ntohl (oa->area_id) > ntohl (area_id))
            area = oa;
        }
    }

  if (area == NULL)
    return NULL;

  *length = v->namelen + sizeof (u_int32_t);
  oid_copy_addr (name + v->namelen, (struct in_addr *) &area->area_id,
                 sizeof (u_int32_t));

  zlog_info ("SNMP found area: %s, exact=%d len=%d length=%d",
             inet_ntoa (* (struct in_addr *) &area->area_id),
             exact, len, *length);

  switch (v->magic)
    {
    case OSPFv3AREAID:                   /* 1*/
      return SNMP_IPADDRESS (INT32_INADDR (area->area_id));
      break;
    case OSPFv3IMPORTASEXTERN:           /* 2*/
      return SNMP_INTEGER (ospf6->external_table->count);
      break;
    default:
      return NULL;
      break;
    }
  return NULL;
}

static u_char *
ospfv3AreaLsdbEntry (struct variable *v, oid *name, size_t *length,
                     int exact, size_t *var_len, WriteMethod **write_method)
{
  struct ospf6_lsa *lsa = NULL;
  struct in_addr area_id;
  u_int16_t type;
  struct in_addr id;
  struct in_addr adv_router;
  int len;
  oid *offset;
  int offsetlen;
  char a[16], b[16], c[16];
  struct ospf6_area *oa;
  listnode node;

  memset (&area_id, 0, sizeof (struct in_addr));
  type = 0;
  memset (&id, 0, sizeof (struct in_addr));
  memset (&adv_router, 0, sizeof (struct in_addr));

  /* Check OSPFv3 instance. */
  if (ospf6 == NULL)
    return NULL;

  /* Get variable length. */
  offset = name + v->namelen;
  offsetlen = *length - v->namelen;

#define OSPFV3_AREA_LSDB_ENTRY_EXACT_OFFSET \
  (IN_ADDR_SIZE + 1 + IN_ADDR_SIZE + IN_ADDR_SIZE)

  if (exact && offsetlen != OSPFV3_AREA_LSDB_ENTRY_EXACT_OFFSET)
    return NULL;

  /* Parse area-id */
  len = (offsetlen < IN_ADDR_SIZE ? offsetlen : IN_ADDR_SIZE);
  if (len)
    oid2in_addr (offset, len, &area_id);
  offset += len;
  offsetlen -= len;

  /* Parse type */
  len = (offsetlen < 1 ? offsetlen : 1);
  if (len)
    type = htons (*offset);
  offset += len;
  offsetlen -= len;

  /* Parse Router-ID */
  len = (offsetlen < IN_ADDR_SIZE ? offsetlen : IN_ADDR_SIZE);
  if (len)
    oid2in_addr (offset, len, &adv_router);
  offset += len;
  offsetlen -= len;

  /* Parse LS-ID */
  len = (offsetlen < IN_ADDR_SIZE ? offsetlen : IN_ADDR_SIZE);
  if (len)
    oid2in_addr (offset, len, &id);
  offset += len;
  offsetlen -= len;

  inet_ntop (AF_INET, &area_id, a, sizeof (a));
  inet_ntop (AF_INET, &adv_router, b, sizeof (b));
  inet_ntop (AF_INET, &id, c, sizeof (c));
  zlog_info ("SNMP access by lsdb: area=%s exact=%d length=%d magic=%d"
             " type=%#x adv_router=%s id=%s",
             a, exact, *length, v->magic, ntohs (type), b, c);

  if (exact)
    {
      oa = ospf6_area_lookup (area_id.s_addr, ospf6);
      lsa = ospf6_lsdb_lookup (type, id.s_addr, adv_router.s_addr, oa->lsdb);
    }
  else
    {
      for (node = listhead (ospf6->area_list); node; nextnode (node))
        {
          oa = (struct ospf6_area *) getdata (node);

          if (lsa)
            continue;
          if (ntohl (oa->area_id) < ntohl (area_id.s_addr))
            continue;

          lsa = ospf6_lsdb_lookup_next (type, id.s_addr, adv_router.s_addr,
                                        oa->lsdb);
          if (! lsa)
            {
              type = 0;
              memset (&id, 0, sizeof (struct in_addr));
              memset (&adv_router, 0, sizeof (struct in_addr));
            }
        }
    }

  if (! lsa)
    {
      zlog_info ("SNMP respond: No LSA to return");
      return NULL;
    }
  oa = OSPF6_AREA (lsa->lsdb->data);

  zlog_info ("SNMP respond: area: %s lsa: %s", oa->name, lsa->name);

  /* Add Index (AreaId, Type, RouterId, Lsid) */
  *length = v->namelen + OSPFV3_AREA_LSDB_ENTRY_EXACT_OFFSET;
  offset = name + v->namelen;
  oid_copy_addr (offset, (struct in_addr *) &oa->area_id, IN_ADDR_SIZE);
  offset += IN_ADDR_SIZE;
  *offset = ntohs (lsa->header->type);
  offset++;
  oid_copy_addr (offset, (struct in_addr *) &lsa->header->adv_router,
                 IN_ADDR_SIZE);
  offset += IN_ADDR_SIZE;
  oid_copy_addr (offset, (struct in_addr *) &lsa->header->id, IN_ADDR_SIZE);
  offset += IN_ADDR_SIZE;

  /* Return the current value of the variable */
  switch (v->magic)
    {
    case OSPFv3AREALSDBAREAID:        /* 1 */
      area_id.s_addr = OSPF6_AREA (lsa->lsdb->data)->area_id;
      return SNMP_IPADDRESS (area_id);
      break;
    case OSPFv3AREALSDBTYPE:          /* 2 */
      return SNMP_INTEGER (ntohs (lsa->header->type));
      break;
    case OSPFv3AREALSDBROUTERID:      /* 3 */
      adv_router.s_addr = lsa->header->adv_router;
      return SNMP_IPADDRESS (adv_router);
      break;
    case OSPFv3AREALSDBLSID:          /* 4 */
      id.s_addr = lsa->header->id;
      return SNMP_IPADDRESS (id);
      break;
    case OSPFv3AREALSDBSEQUENCE:      /* 5 */
      return SNMP_INTEGER (lsa->header->seqnum);
      break;
    case OSPFv3AREALSDBAGE:           /* 6 */
      ospf6_lsa_age_current (lsa);
      return SNMP_INTEGER (lsa->header->age);
      break;
    case OSPFv3AREALSDBCHECKSUM:      /* 7 */
      return SNMP_INTEGER (lsa->header->checksum);
      break;
    case OSPFv3AREALSDBADVERTISEMENT: /* 8 */
      *var_len = ntohs (lsa->header->length);
      return (u_char *) lsa->header;
      break;
    case OSPFv3AREALSDBTYPEKNOWN:     /* 9 */
      return SNMP_INTEGER (OSPF6_LSA_IS_KNOWN (lsa->header->type) ?
                           SNMP_TRUE : SNMP_FALSE);
      break;
    default:
      return NULL;
      break;
    }
  return NULL;
}


/* Register OSPFv3-MIB. */
void
ospf6_snmp_init ()
{
  smux_init (ospf6d_oid, sizeof (ospf6d_oid) / sizeof (oid));
  REGISTER_MIB ("OSPFv3MIB", ospfv3_variables, variable, ospfv3_oid);
  smux_start ();
}

#endif /* HAVE_SNMP */