/* Connect retry timer is expired when the peer status is Connect. */
static int
bgp_reconnect (struct peer *peer)
{
bgp_stop (peer);
bgp_start (peer);
return 0;
}
/* Flush the event queue and ensure the peer is shut down */
static int
bgp_clearing_completed (struct peer *peer)
{
int rc = bgp_stop(peer);
BGP_EVENT_FLUSH (peer);
return rc;
}
static void
bgp_graceful_restart_timeout(timer *t)
{
struct bgp_proto *p = t->data;
BGP_TRACE(D_EVENTS, "Neighbor graceful restart timeout");
bgp_stop(p, 0);
}
static void
bgp_conn_leave_established_state(struct bgp_proto *p)
{
BGP_TRACE(D_EVENTS, "BGP session closed");
p->conn = NULL;
if (p->p.proto_state == PS_UP)
bgp_stop(p, 0);
}
/* BGP peer is stoped by the error. */
static int
bgp_stop_with_error (struct peer *peer)
{
/* Double start timer. */
peer->v_start *= 2;
/* Overflow check. */
if (peer->v_start >= (60 * 2))
peer->v_start = (60 * 2);
bgp_stop (peer);
return 0;
}
int
bgp_apply_limits(struct bgp_proto *p)
{
if (p->cf->route_limit && (p->p.stats.imp_routes > p->cf->route_limit))
{
log(L_WARN "%s: Route limit exceeded, shutting down", p->p.name);
bgp_store_error(p, NULL, BE_AUTO_DOWN, BEA_ROUTE_LIMIT_EXCEEDED);
bgp_update_startup_delay(p);
bgp_stop(p, 1); // Errcode 6, 1 - max number of prefixes reached
return -1;
}
return 0;
}
/* BGP peer is stoped by the error. */
int
bgp_stop_with_error (struct peer *peer)
{
/* Double start timer. */
peer->v_active_delay *= 2;
/* Overflow check. */
if (peer->v_active_delay > BGP_DEFAULT_CONNECT_RETRY)
peer->v_active_delay = BGP_DEFAULT_CONNECT_RETRY;
bgp_stop (peer);
return 0;
}
/* Hold timer expire. This is error of BGP connection. So cut the
peer and change to Idle status. */
static int
bgp_fsm_holdtime_expire (struct peer *peer)
{
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG, "%s [FSM] Hold timer expire", peer->host);
/* Send notify to remote peer. */
bgp_notify_send (peer, BGP_NOTIFY_HOLD_ERR, 0);
/* Sweep if it is temporary peer. */
if (CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER))
{
zlog_info ("%s [Event] Accepting BGP peer is deleted", peer->host);
peer_delete (peer);
return -1;
}
/* bgp_stop needs to be invoked while in Established state */
bgp_stop(peer);
return 0;
}
/* something went wrong, send notify and tear down */
static int
bgp_stop_with_notify (struct peer *peer, u_char code, u_char sub_code)
{
/* Send notify to remote peer */
bgp_notify_send (peer, code, sub_code);
/* Sweep if it is temporary peer. */
if (CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER))
{
zlog_info ("%s [Event] Accepting BGP peer is deleted", peer->host);
peer_delete (peer);
return -1;
}
/* Clear start timer value to default. */
peer->v_start = BGP_INIT_START_TIMER;
/* bgp_stop needs to be invoked while in Established state */
bgp_stop(peer);
return 0;
}
/* TCP connect fail */
static int
bgp_connect_fail (struct peer *peer)
{
bgp_stop (peer);
return 0;
}