ospf_snmp.c

router source code for the ospdf.

	  if (IPV4_ADDR_SAME (&osif->addr, ifaddr))
	    return osif->ifp;
	}
      else
	{
	  if (osif->ifindex == *ifindex)
	    return osif->ifp;
	}
    }
  return NULL;
}

struct interface *
ospf_snmp_if_lookup_next (struct in_addr *ifaddr, unsigned int *ifindex,
			  int ifaddr_next, int ifindex_next)
{
  struct ospf_snmp_if *osif;
  struct listnode *nn;

  if (ifaddr_next)
    {
      nn = listhead (ospf_snmp_iflist);
      if (nn)
	{
	  osif = getdata (nn);
	  *ifaddr = osif->addr;
	  *ifindex = osif->ifindex;
	  return osif->ifp;
	}
      return NULL;
    }

  LIST_LOOP (ospf_snmp_iflist, osif, nn)
    {
      if (ifaddr->s_addr)
	{
	  if (ntohl (osif->addr.s_addr) > ntohl (ifaddr->s_addr))
	    {
	      *ifaddr = osif->addr;
	      *ifindex = osif->ifindex;
	      return osif->ifp;
	    }
	}
      else
	{
	  if (osif->ifindex > *ifindex || osif->addr.s_addr)
	    {
	      *ifaddr = osif->addr;
	      *ifindex = osif->ifindex;
	      return osif->ifp;
	    }
	}
    }
  return NULL;
}

int
ospf_snmp_iftype (struct interface *ifp)
{
#define ospf_snmp_iftype_broadcast         1
#define ospf_snmp_iftype_nbma              2
#define ospf_snmp_iftype_pointToPoint      3
#define ospf_snmp_iftype_pointToMultipoint 5
  if (if_is_broadcast (ifp))
    return ospf_snmp_iftype_broadcast;
  if (if_is_pointopoint (ifp))
    return ospf_snmp_iftype_pointToPoint;
  return ospf_snmp_iftype_broadcast;
}

struct interface *
ospfIfLookup (struct variable *v, oid *name, size_t *length,
	      struct in_addr *ifaddr, unsigned int *ifindex, int exact)
{
  int len;
  int ifaddr_next = 0;
  int ifindex_next = 0;
  struct interface *ifp;
  oid *offset;

  if (exact)
    {
      if (*length != v->namelen + IN_ADDR_SIZE + 1)
	return NULL;

      oid2in_addr (name + v->namelen, IN_ADDR_SIZE, ifaddr);
      *ifindex = name[v->namelen + IN_ADDR_SIZE];

      return ospf_snmp_if_lookup (ifaddr, ifindex);
    }
  else
    {
      len = *length - v->namelen;
      if (len >= IN_ADDR_SIZE)
	len = IN_ADDR_SIZE;
      if (len <= 0)
	ifaddr_next = 1;

      oid2in_addr (name + v->namelen, len, ifaddr);

      len = *length - v->namelen - IN_ADDR_SIZE;
      if (len >= 1)
	len = 1;
      else
	ifindex_next = 1;

      if (len == 1)
	*ifindex = name[v->namelen + IN_ADDR_SIZE];

      ifp = ospf_snmp_if_lookup_next (ifaddr, ifindex, ifaddr_next,
				      ifindex_next);
      if (ifp)
	{
	  *length = v->namelen + IN_ADDR_SIZE + 1;
	  offset = name + v->namelen;
	  oid_copy_addr (offset, ifaddr, IN_ADDR_SIZE);
	  offset += IN_ADDR_SIZE;
	  *offset = *ifindex;
	  return ifp;
	}
    }
  return NULL;
}

static u_char *
ospfIfEntry (struct variable *v, oid *name, size_t *length, int exact,
	     size_t  *var_len, WriteMethod **write_method)
{
  struct interface *ifp;
  unsigned int ifindex;
  struct in_addr ifaddr;
  struct ospf_interface *oi;
  struct ospf *ospf;

  ifindex = 0;
  memset (&ifaddr, 0, sizeof (struct in_addr));

  /* Check OSPF instance. */
  ospf = ospf_lookup ();
  if (ospf == NULL)
    return NULL;

  ifp = ospfIfLookup (v, name, length, &ifaddr, &ifindex, exact);
  if (ifp == NULL)
    return NULL;

  oi = ospf_if_lookup_by_local_addr (ospf, ifp, ifaddr);
  if (oi == NULL)
    return NULL;

  /* Return the current value of the variable */
  switch (v->magic) 
    {
    case OSPFIFIPADDRESS:	/* 1 */
      return SNMP_IPADDRESS (ifaddr);
      break;
    case OSPFADDRESSLESSIF:	/* 2 */
      return SNMP_INTEGER (ifindex);
      break;
    case OSPFIFAREAID:		/* 3 */
      if (oi->area)
	return SNMP_IPADDRESS (oi->area->area_id);
      else
	return SNMP_IPADDRESS (ospf_empty_addr);
      break;
    case OSPFIFTYPE:		/* 4 */
      return SNMP_INTEGER (ospf_snmp_iftype (ifp));
      break;
    case OSPFIFADMINSTAT:	/* 5 */
      if (oi)
	return SNMP_INTEGER (OSPF_STATUS_ENABLED);
      else
	return SNMP_INTEGER (OSPF_STATUS_DISABLED);
      break;
    case OSPFIFRTRPRIORITY:	/* 6 */
      return SNMP_INTEGER (PRIORITY (oi));
      break;
    case OSPFIFTRANSITDELAY:	/* 7 */
      return SNMP_INTEGER (OSPF_IF_PARAM (oi, transmit_delay));
      break;
    case OSPFIFRETRANSINTERVAL:	/* 8 */
      return SNMP_INTEGER (OSPF_IF_PARAM (oi, retransmit_interval));
      break;
    case OSPFIFHELLOINTERVAL:	/* 9 */
      return SNMP_INTEGER (OSPF_IF_PARAM (oi, v_hello));
      break;
    case OSPFIFRTRDEADINTERVAL:	/* 10 */
      return SNMP_INTEGER (OSPF_IF_PARAM (oi, v_wait));
      break;
    case OSPFIFPOLLINTERVAL:	/* 11 */
      return SNMP_INTEGER (OSPF_POLL_INTERVAL_DEFAULT);
      break;
    case OSPFIFSTATE:		/* 12 */
      return SNMP_INTEGER (oi->state);
      break;
    case OSPFIFDESIGNATEDROUTER: /* 13 */
      return SNMP_IPADDRESS (DR (oi));
      break;
    case OSPFIFBACKUPDESIGNATEDROUTER: /* 14 */
      return SNMP_IPADDRESS (BDR (oi));
      break;
    case OSPFIFEVENTS:		/* 15 */
      return SNMP_INTEGER (oi->state_change);
      break;
    case OSPFIFAUTHKEY:		/* 16 */
      *var_len = 0;
      return (u_char *) OSPF_IF_PARAM (oi, auth_simple);
      break;
    case OSPFIFSTATUS:		/* 17 */
      return SNMP_INTEGER (SNMP_VALID);
      break;
    case OSPFIFMULTICASTFORWARDING: /* 18 */
#define ospf_snmp_multiforward_blocked    1
#define ospf_snmp_multiforward_multicast  2
#define ospf_snmp_multiforward_unicast    3
      return SNMP_INTEGER (ospf_snmp_multiforward_blocked);
      break;
    case OSPFIFDEMAND:		/* 19 */
      return SNMP_INTEGER (SNMP_FALSE);
      break;
    case OSPFIFAUTHTYPE:	/* 20 */
      if (oi->area)
	return SNMP_INTEGER (oi->area->auth_type);
      else
	return SNMP_INTEGER (0);
      break;
    default:
      return NULL;
      break;
    }
  return NULL;
}

#define OSPF_SNMP_METRIC_VALUE 1

struct interface *
ospfIfMetricLookup (struct variable *v, oid *name, size_t *length,
		    struct in_addr *ifaddr, unsigned int *ifindex, int exact)
{
  int len;
  int ifaddr_next = 0;
  int ifindex_next = 0;
  struct interface *ifp;
  oid *offset;
  int metric;

  if (exact)
    {
      if (*length != v->namelen + IN_ADDR_SIZE + 1 + 1)
	return NULL;

      oid2in_addr (name + v->namelen, IN_ADDR_SIZE, ifaddr);
      *ifindex = name[v->namelen + IN_ADDR_SIZE];
      metric = name[v->namelen + IN_ADDR_SIZE + 1];

      if (metric != OSPF_SNMP_METRIC_VALUE)
	return NULL;

      return ospf_snmp_if_lookup (ifaddr, ifindex);
    }
  else
    {
      len = *length - v->namelen;
      if (len >= IN_ADDR_SIZE)
	len = IN_ADDR_SIZE;
      else
	ifaddr_next = 1;

      oid2in_addr (name + v->namelen, len, ifaddr);

      len = *length - v->namelen - IN_ADDR_SIZE;
      if (len >= 1)
	len = 1;
      else
	ifindex_next = 1;

      if (len == 1)
	*ifindex = name[v->namelen + IN_ADDR_SIZE];

      ifp = ospf_snmp_if_lookup_next (ifaddr, ifindex, ifaddr_next,
				      ifindex_next);
      if (ifp)
	{
	  *length = v->namelen + IN_ADDR_SIZE + 1 + 1;
	  offset = name + v->namelen;
	  oid_copy_addr (offset, ifaddr, IN_ADDR_SIZE);
	  offset += IN_ADDR_SIZE;
	  *offset = *ifindex;
	  offset++;
	  *offset = OSPF_SNMP_METRIC_VALUE;
	  return ifp;
	}
    }
  return NULL;
}

static u_char *
ospfIfMetricEntry (struct variable *v, oid *name, size_t *length, int exact,
		   size_t *var_len, WriteMethod **write_method)
{
  /* Currently we support metric 1 only. */
  struct interface *ifp;
  unsigned int ifindex;
  struct in_addr ifaddr;
  struct ospf_interface *oi;
  struct ospf *ospf;

  ifindex = 0;
  memset (&ifaddr, 0, sizeof (struct in_addr));

  /* Check OSPF instance. */
  ospf = ospf_lookup ();
  if (ospf == NULL)
    return NULL;

  ifp = ospfIfMetricLookup (v, name, length, &ifaddr, &ifindex, exact);
  if (ifp == NULL)
    return NULL;

  oi = ospf_if_lookup_by_local_addr (ospf, ifp, ifaddr);
  if (oi == NULL)
    return NULL;

  /* Return the current value of the variable */
  switch (v->magic) 
    {
    case OSPFIFMETRICIPADDRESS:
      return SNMP_IPADDRESS (ifaddr);
      break;
    case OSPFIFMETRICADDRESSLESSIF:
      return SNMP_INTEGER (ifindex);
      break;
    case OSPFIFMETRICTOS:
      return SNMP_INTEGER (0);
      break;
    case OSPFIFMETRICVALUE:
      return SNMP_INTEGER (OSPF_SNMP_METRIC_VALUE);
      break;
    case OSPFIFMETRICSTATUS:
      return SNMP_INTEGER (1);
      break;
    default:
      return NULL;
      break;
    }
  return NULL;
}

struct route_table *ospf_snmp_vl_table;

void
ospf_snmp_vl_add (struct ospf_vl_data *vl_data)
{
  struct prefix_ls lp;
  struct route_node *rn;

  memset (&lp, 0, sizeof (struct prefix_ls));
  lp.family = 0;
  lp.prefixlen = 64;
  lp.id = vl_data->vl_area_id;
  lp.adv_router = vl_data->vl_peer;

  rn = route_node_get (ospf_snmp_vl_table, (struct prefix *) &lp);
  rn->info = vl_data;
}

void
ospf_snmp_vl_delete (struct ospf_vl_data *vl_data)
{
  struct prefix_ls lp;
  struct route_node *rn;

  memset (&lp, 0, sizeof (struct prefix_ls));
  lp.family = 0;
  lp.prefixlen = 64;
  lp.id = vl_data->vl_area_id;
  lp.adv_router = vl_data->vl_peer;

  rn = route_node_lookup (ospf_snmp_vl_table, (struct prefix *) &lp);
  if (! rn)
    return;
  rn->info = NULL;
  route_unlock_node (rn);
  route_unlock_node (rn);
}

struct ospf_vl_data *
ospf_snmp_vl_lookup (struct in_addr *area_id, struct in_addr *neighbor)
{
  struct prefix_ls lp;
  struct route_node *rn;
  struct ospf_vl_data *vl_data;

  memset (&lp, 0, sizeof (struct prefix_ls));
  lp.family = 0;
  lp.prefixlen = 64;
  lp.id = *area_id;
  lp.adv_router = *neighbor;

  rn = route_node_lookup (ospf_snmp_vl_table, (struct prefix *) &lp);
  if (rn)
    {
      vl_data = rn->info;
      route_unlock_node (rn);
      return vl_data;
    }
  return NULL;
}

struct ospf_vl_data *
ospf_snmp_vl_lookup_next (struct in_addr *area_id, struct in_addr *neighbor,
			  int first)
{
  struct prefix_ls lp;
  struct route_node *rn;
  struct ospf_vl_data *vl_data;

  memset (&lp, 0, sizeof (struct prefix_ls));
  lp.family = 0;
  lp.prefixlen = 64;
  lp.id = *area_id;
  lp.adv_router = *neighbor;

  if (first)
    rn = route_top (ospf_snmp_vl_table);
  else
    {
      rn = route_node_get (ospf_snmp_vl_table, (struct prefix *) &lp);
      rn = route_next (rn);
    }

  for (; rn; rn = route_next (rn))
    if (rn->info)
      break;

  if (rn && rn->info)
    {
      vl_data = rn->info;
      *area_id = vl_data->vl_area_id;
      *neighbor = vl_data->vl_peer;
      route_unlock_node (rn);
      return vl_data;
    }
  return NULL;
}

struct ospf_vl_data *
ospfVirtIfLookup (struct variable *v, oid *name, size_t *length,
		  struct in_addr *area_id, struct in_addr *neighbor, int exact)
{
  int first;
  int len;
  struct ospf_vl_data *vl_data;

  if (exact)
    {
      if (*length != v->namelen + IN_ADDR_SIZE + IN_ADDR_SIZE)
	return NULL;

      oid2in_addr (name + v->namelen, IN_ADDR_SIZE, area_id);
      oid2in_addr (name + v->namelen + IN_ADDR_SIZE, IN_ADDR_SIZE, neighbor);

      return ospf_snmp_vl_lookup (area_id, neighbor);
    }
  else
    {
      first = 0;

      len = *length - v->namelen;
      if (len <= 0)
	first = 1;
      if (len > IN_ADDR_SIZE)
	len = IN_ADDR_SIZE;
      oid2in_addr (name + v->namelen, len, area_id);

      len = *length - v->namelen - IN_ADDR_SIZE;
      if (len > IN_ADDR_SIZE)
	len = IN_ADDR_SIZE;
      oid2in_addr (name + v->namelen + IN_ADDR_SIZE, len, neighbor);

      vl_data = ospf_snmp_vl_lookup_next (area_id, neighbor, first);

      if (vl_data)
	{
	  *length = v->namelen + IN_ADDR_SIZE + IN_ADDR_SIZE;
	  oid_copy_addr (name + v->namelen, area_id, IN_ADDR_SIZE);
	  oid_copy_addr (name + v->namelen + IN_ADDR_SIZE, neighbor,
			 IN_ADDR_SIZE);
	  return vl_data;
	}
    }
  return NULL;
}

static u_char *
ospfVirtIfEntry (struct variable *v, oid *name, size_t *length, int exact,
		 size_t  *var_len, WriteMethod **write_method)