void
bgp_adj_out_unset (struct bgp_node *rn, struct peer *peer, struct prefix *p,
afi_t afi, safi_t safi)
{
struct bgp_adj_out *adj;
struct bgp_advertise *adv;
#ifdef DISABLE_BGP_ANNOUNCE
return;
#endif /* DISABLE_BGP_ANNOUNCE */
/* Lookup existing adjacency, if it is not there return immediately. */
for (adj = rn->adj_out; adj; adj = adj->next)
if (adj->peer == peer)
break;
if (! adj)
return;
/* Clearn up previous advertisement. */
if (adj->adv)
bgp_advertise_clean (peer, adj, afi, safi);
if (adj->attr)
{
/* We need advertisement structure. */
adj->adv = bgp_advertise_new ();
adv = adj->adv;
adv->rn = rn;
adv->adj = adj;
/* Add to synchronization entry for withdraw announcement. */
FIFO_ADD (&peer->sync[afi][safi]->withdraw, &adv->fifo);
/* Schedule packet write. */
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
}
else
{
/* Remove myself from adjacency. */
BGP_ADJ_OUT_DEL (rn, adj);
/* Free allocated information. */
bgp_adj_out_free (adj);
bgp_unlock_node (rn);
}
}
/* This function is the first starting point of all BGP connection. It
try to connect to remote peer with non-blocking IO. */
int
bgp_start (struct peer *peer)
{
int status;
/* If the peer is passive mode, force to move to Active mode. */
if (CHECK_FLAG (peer->flags, PEER_FLAG_PASSIVE))
{
BGP_EVENT_ADD (peer, TCP_connection_open_failed);
return 0;
}
status = bgp_connect (peer);
switch (status)
{
case connect_error:
if (BGP_DEBUG (fsm, FSM))
plog_info (peer->log, "%s [FSM] Connect error", peer->host);
BGP_EVENT_ADD (peer, TCP_connection_open_failed);
break;
case connect_success:
if (BGP_DEBUG (fsm, FSM))
plog_info (peer->log, "%s [FSM] Connect immediately success",
peer->host);
BGP_EVENT_ADD (peer, TCP_connection_open);
break;
case connect_in_progress:
/* To check nonblocking connect, we wait until socket is
readable or writable. */
if (BGP_DEBUG (fsm, FSM))
plog_info (peer->log, "%s [FSM] Non blocking connect waiting result",
peer->host);
if (peer->fd < 0)
{
zlog_err ("bgp_start peer's fd is negative value %d",
peer->fd);
return -1;
}
BGP_READ_ON (peer->t_read, bgp_read, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
break;
}
return 0;
}
int
bgp_routeadv_timer_vpnv4_unicast (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_routeadv[AFI_IP][SAFI_MPLS_VPN] = NULL;
if (BGP_DEBUG (events, EVENTS))
zlog_info ("%s routeadv timer expired for VPNv4 unicast", peer->host);
peer->synctime[AFI_IP][SAFI_MPLS_VPN] = time (NULL);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_TIMER_ON (peer->t_routeadv[AFI_IP][SAFI_MPLS_VPN], bgp_routeadv_timer_vpnv4_unicast,
peer->v_routeadv);
return 0;
}
static int
bgp_routeadv_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_routeadv = NULL;
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG,
"%s [FSM] Timer (routeadv timer expire)",
peer->host);
peer->synctime = bgp_clock ();
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_TIMER_ON (peer->t_routeadv, bgp_routeadv_timer,
peer->v_routeadv);
return 0;
}
/* This function is the first starting point of all BGP connection. It
try to connect to remote peer with non-blocking IO. */
int
bgp_start (struct peer *peer)
{
int status;
if (BGP_PEER_START_SUPPRESSED (peer))
{
if (BGP_DEBUG (fsm, FSM))
plog_err (peer->log, "%s [FSM] Trying to start suppressed peer"
" - this is never supposed to happen!", peer->host);
return -1;
}
/* Scrub some information that might be left over from a previous,
* session
*/
/* Connection information. */
if (peer->su_local)
{
sockunion_free (peer->su_local);
peer->su_local = NULL;
}
if (peer->su_remote)
{
sockunion_free (peer->su_remote);
peer->su_remote = NULL;
}
/* Clear remote router-id. */
peer->remote_id.s_addr = 0;
/* Clear peer capability flag. */
peer->cap = 0;
/* If the peer is passive mode, force to move to Active mode. */
if (CHECK_FLAG (peer->flags, PEER_FLAG_PASSIVE))
{
BGP_EVENT_ADD (peer, TCP_connection_open_failed);
return 0;
}
status = bgp_connect (peer);
switch (status)
{
case connect_error:
if (BGP_DEBUG (fsm, FSM))
plog_debug (peer->log, "%s [FSM] Connect error", peer->host);
BGP_EVENT_ADD (peer, TCP_connection_open_failed);
break;
case connect_success:
if (BGP_DEBUG (fsm, FSM))
plog_debug (peer->log, "%s [FSM] Connect immediately success",
peer->host);
BGP_EVENT_ADD (peer, TCP_connection_open);
break;
case connect_in_progress:
/* To check nonblocking connect, we wait until socket is
readable or writable. */
if (BGP_DEBUG (fsm, FSM))
plog_debug (peer->log, "%s [FSM] Non blocking connect waiting result",
peer->host);
if (peer->fd < 0)
{
zlog_err ("bgp_start peer's fd is negative value %d",
peer->fd);
return -1;
}
BGP_READ_ON (peer->t_read, bgp_read, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
break;
}
return 0;
}
