/* Inteface addition message from zebra. */
static int
bgp_interface_add (int command, struct zclient *zclient, zebra_size_t length,
vrf_id_t vrf_id)
{
struct interface *ifp;
ifp = zebra_interface_add_read (zclient->ibuf, vrf_id);
if (BGP_DEBUG(zebra, ZEBRA) && ifp)
zlog_debug("Zebra rcvd: interface add %s", ifp->name);
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;
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;
}
/* BGP try to connect to the peer. */
int
bgp_connect (struct peer *peer)
{
ifindex_t ifindex = 0;
/* Make socket for the peer. */
peer->fd = sockunion_socket (&peer->su);
if (peer->fd < 0)
return -1;
set_nonblocking (peer->fd);
/* Set socket send buffer size */
bgp_update_sock_send_buffer_size(peer->fd);
bgp_set_socket_ttl (peer, peer->fd);
sockopt_reuseaddr (peer->fd);
sockopt_reuseport (peer->fd);
#ifdef IPTOS_PREC_INTERNETCONTROL
if (bgpd_privs.change (ZPRIVS_RAISE))
zlog_err ("%s: could not raise privs", __func__);
if (sockunion_family (&peer->su) == AF_INET)
setsockopt_ipv4_tos (peer->fd, IPTOS_PREC_INTERNETCONTROL);
else if (sockunion_family (&peer->su) == AF_INET6)
setsockopt_ipv6_tclass (peer->fd, IPTOS_PREC_INTERNETCONTROL);
if (bgpd_privs.change (ZPRIVS_LOWER))
zlog_err ("%s: could not lower privs", __func__);
#endif
if (peer->password)
bgp_md5_set_connect (peer->fd, &peer->su, peer->password);
/* Bind socket. */
bgp_bind (peer);
/* Update source bind. */
bgp_update_source (peer);
if (peer->ifname)
ifindex = ifname2ifindex (peer->ifname);
if (BGP_DEBUG (events, EVENTS))
plog_debug (peer->log, "%s [Event] Connect start to %s fd %d",
peer->host, peer->host, peer->fd);
/* Connect to the remote peer. */
return sockunion_connect (peer->fd, &peer->su, htons (peer->port), ifindex);
}
static int
bgp_interface_down (int command, struct zclient *zclient, zebra_size_t length)
{
struct stream *s;
struct interface *ifp;
struct connected *c;
struct listnode *node, *nnode;
s = zclient->ibuf;
ifp = zebra_interface_state_read (s);
if (! ifp)
return 0;
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("Zebra rcvd: interface %s down", ifp->name);
for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, c))
bgp_connected_delete (c);
/* Fast external-failover (Currently IPv4 only) */
{
struct listnode *mnode;
struct bgp *bgp;
struct peer *peer;
struct interface *peer_if;
for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp))
{
if (CHECK_FLAG (bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER))
continue;
for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer))
{
if (peer->ttl != 1)
continue;
if (peer->su.sa.sa_family == AF_INET)
peer_if = if_lookup_by_ipv4 (&peer->su.sin.sin_addr);
else
continue;
if (ifp == peer_if)
BGP_EVENT_ADD (peer, BGP_Stop);
}
}
}
return 0;
}
/* Called after event occured, this function change status and reset
read/write and timer thread. */
void
bgp_fsm_change_status (struct peer *peer, int status)
{
bgp_dump_state (peer, peer->status, status);
/* Preserve old status and change into new status. */
peer->ostatus = peer->status;
peer->status = status;
if (BGP_DEBUG (normal, NORMAL))
zlog_debug ("%s went from %s to %s",
peer->host,
LOOKUP (bgp_status_msg, peer->ostatus),
LOOKUP (bgp_status_msg, peer->status));
}
/* Called after event occured, this function change status and reset
read/write and timer thread. */
void
bgp_fsm_change_status (struct peer *peer, int status)
{
bgp_dump_state (peer, peer->status, status);
/* Preserve old status and change into new status. */
peer->ostatus = peer->status;
peer->status = status;
if (BGP_DEBUG (normal, NORMAL))
if (! CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER))
zlog_info ("%s went from %s to %s", peer->host,
LOOKUP (bgp_status_msg, peer->ostatus),
LOOKUP (bgp_status_msg, peer->status));
}
/* dump notify packet */
void
bgp_notify_print(struct peer *peer, struct bgp_notify *bgp_notify,
const char *direct)
{
const char *subcode_str;
subcode_str = "";
switch (bgp_notify->code)
{
case BGP_NOTIFY_HEADER_ERR:
subcode_str = LOOKUP (bgp_notify_head_msg, bgp_notify->subcode);
break;
case BGP_NOTIFY_OPEN_ERR:
subcode_str = LOOKUP (bgp_notify_open_msg, bgp_notify->subcode);
break;
case BGP_NOTIFY_UPDATE_ERR:
subcode_str = LOOKUP (bgp_notify_update_msg, bgp_notify->subcode);
break;
case BGP_NOTIFY_HOLD_ERR:
subcode_str = "";
break;
case BGP_NOTIFY_FSM_ERR:
subcode_str = "";
break;
case BGP_NOTIFY_CEASE:
subcode_str = LOOKUP (bgp_notify_cease_msg, bgp_notify->subcode);
break;
case BGP_NOTIFY_CAPABILITY_ERR:
subcode_str = LOOKUP (bgp_notify_capability_msg, bgp_notify->subcode);
break;
}
if (bgp_flag_check (peer->bgp, BGP_FLAG_LOG_NEIGHBOR_CHANGES))
zlog_info ("%%NOTIFICATION: %s neighbor %s %d/%d (%s%s) %d bytes %s",
strcmp (direct, "received") == 0 ? "received from" : "sent to",
peer->host, bgp_notify->code, bgp_notify->subcode,
LOOKUP (bgp_notify_msg, bgp_notify->code),
subcode_str, bgp_notify->length,
bgp_notify->data ? bgp_notify->data : "");
else if (BGP_DEBUG (normal, NORMAL))
plog_debug (peer->log, "%s %s NOTIFICATION %d/%d (%s%s) %d bytes %s",
peer ? peer->host : "",
direct, bgp_notify->code, bgp_notify->subcode,
LOOKUP (bgp_notify_msg, bgp_notify->code),
subcode_str, bgp_notify->length,
bgp_notify->data ? bgp_notify->data : "");
}
static int
bgp_interface_delete (int command, struct zclient *zclient,
zebra_size_t length)
{
struct stream *s;
struct interface *ifp;
s = zclient->ibuf;
ifp = zebra_interface_state_read (s);
ifp->ifindex = IFINDEX_INTERNAL;
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("Zebra rcvd: interface delete %s", ifp->name);
return 0;
}
/* BGP scan thread. This thread check nexthop reachability. */
static int
bgp_scan_timer (struct thread *t)
{
bgp_scan_thread =
thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval);
if (BGP_DEBUG (events, EVENTS))
zlog_debug ("Performing BGP general scanning");
bgp_scan (AFI_IP, SAFI_UNICAST);
#ifdef HAVE_IPV6
bgp_scan (AFI_IP6, SAFI_UNICAST);
#endif /* HAVE_IPV6 */
return 0;
}
/* BGP connect retry timer. */
static int
bgp_connect_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_connect = NULL;
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG, "%s [FSM] Timer (connect timer expire)",
peer->host);
THREAD_VAL (thread) = ConnectRetry_timer_expired;
bgp_event (thread); /* bgp_event unlocks peer */
return 0;
}
/* BGP try to connect to the peer. */
int
bgp_connect (struct peer *peer)
{
unsigned int ifindex = 0;
/* Make socket for the peer. */
peer->fd = sockunion_socket (&peer->su);
if (peer->fd < 0)
return -1;
/* If we can get socket for the peer, adjest TTL and make connection. */
if (peer_sort (peer) == BGP_PEER_EBGP) {
sockopt_ttl (peer->su.sa.sa_family, peer->fd, peer->ttl);
if (peer->gtsm_hops)
sockopt_minttl (peer->su.sa.sa_family, peer->fd, MAXTTL + 1 - peer->gtsm_hops);
}
sockopt_reuseaddr (peer->fd);
sockopt_reuseport (peer->fd);
#ifdef IPTOS_PREC_INTERNETCONTROL
if (sockunion_family (&peer->su) == AF_INET)
setsockopt_ipv4_tos (peer->fd, IPTOS_PREC_INTERNETCONTROL);
#endif
if (peer->password)
bgp_md5_set_connect (peer->fd, &peer->su, peer->password);
/* Bind socket. */
bgp_bind (peer);
/* Update source bind. */
bgp_update_source (peer);
#ifdef HAVE_IPV6
if (peer->ifname)
ifindex = if_nametoindex (peer->ifname);
#endif /* HAVE_IPV6 */
if (BGP_DEBUG (events, EVENTS))
plog_debug (peer->log, "%s [Event] Connect start to %s fd %d",
peer->host, peer->host, peer->fd);
/* Connect to the remote peer. */
return sockunion_connect (peer->fd, &peer->su, htons (peer->port), ifindex);
}
/* BGP start timer. This function set BGP_Start event to thread value
and process event. */
static int
bgp_start_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_start = NULL;
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG,
"%s [FSM] Timer (start timer expire).", peer->host);
THREAD_VAL (thread) = BGP_Start;
bgp_event (thread); /* bgp_event unlocks peer */
return 0;
}
/* BGP holdtime timer. */
static int
bgp_holdtime_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_holdtime = NULL;
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG,
"%s [FSM] Timer (holdtime timer expire)",
peer->host);
THREAD_VAL (thread) = Hold_Timer_expired;
bgp_event (thread);
return 0;
}
/* BGP keepalive fire ! */
static int
bgp_keepalive_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_keepalive = NULL;
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG,
"%s [FSM] Timer (keepalive timer expire)",
peer->host);
THREAD_VAL (thread) = KeepAlive_timer_expired;
bgp_event (thread); /* bgp_event unlocks peer */
return 0;
}
/* BGP start timer. This function set BGP_Start event to thread value
and process event. */
static int
bgp_start_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_start = NULL;
UNSET_FLAG (peer->sflags, PEER_STATUS_CREATE_INIT);
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG,
"%s [FSM] Timer (start timer expire).", peer->host);
THREAD_VAL (thread) = BGP_Start;
bgp_event (thread);
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;
}
return 0;
}
static as_t
bgp_capability_as4 (struct peer *peer, struct capability_header *hdr)
{
SET_FLAG (peer->cap, PEER_CAP_AS4_RCV);
if (hdr->length != CAPABILITY_CODE_AS4_LEN)
{
zlog_err ("%s AS4 capability has incorrect data length %d",
peer->host, hdr->length);
return 0;
}
as_t as4 = stream_getl (BGP_INPUT(peer));
if (BGP_DEBUG (as4, AS4))
zlog_debug ("%s [AS4] about to set cap PEER_CAP_AS4_RCV, got as4 %u",
peer->host, as4);
return as4;
}
/* Execute event process. */
int
bgp_event (struct thread *thread)
{
int ret = 0;
int event;
int next;
struct peer *peer;
peer = THREAD_ARG (thread);
event = THREAD_VAL (thread);
/* Logging this event. */
next = FSM [peer->status -1][event - 1].next_state;
if (BGP_DEBUG (fsm, FSM) && peer->status != next)
plog_debug (peer->log, "%s [FSM] %s (%s->%s)", peer->host,
bgp_event_str[event],
LOOKUP (bgp_status_msg, peer->status),
LOOKUP (bgp_status_msg, next));
/* Call function. */
if (FSM [peer->status -1][event - 1].func)
ret = (*(FSM [peer->status - 1][event - 1].func))(peer);
/* When function do not want proceed next job return -1. */
if (ret >= 0)
{
/* If status is changed. */
if (next != peer->status)
{
/* Transition into Clearing must /always/ clear all routes.. */
if (next == Clearing)
bgp_clear_route_all (peer);
bgp_fsm_change_status (peer, next);
}
/* Make sure timer is set. */
bgp_timer_set (peer);
}
return ret;
}
static int
bgp_interface_down (int command, struct zclient *zclient, zebra_size_t length)
{
struct stream *s;
struct interface *ifp;
struct connected *c;
struct listnode *node, *nnode;
s = zclient->ibuf;
ifp = zebra_interface_state_read (s);
if (! ifp)
return 0;
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("Zebra rcvd: interface %s down", ifp->name);
for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, c))
bgp_connected_delete (c);
/* Fast external-failover */
{
struct listnode *mnode;
struct bgp *bgp;
struct peer *peer;
for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp))
{
if (CHECK_FLAG (bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER))
continue;
for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer))
{
if ((peer->ttl != 1) && (peer->gtsm_hops != 1))
continue;
if (ifp == peer->nexthop.ifp)
BGP_EVENT_ADD (peer, BGP_Stop);
}
}
}
return 0;
}
/* Router-id update message from zebra. */
static int
bgp_router_id_update (int command, struct zclient *zclient, zebra_size_t length,
vrf_id_t vrf_id)
{
struct prefix router_id;
zebra_router_id_update_read(zclient->ibuf,&router_id);
if (BGP_DEBUG(zebra, ZEBRA))
{
char buf[128];
prefix2str(&router_id, buf, sizeof(buf));
zlog_debug("Zebra rcvd: router id update %s", buf);
}
router_id_zebra = router_id.u.prefix4;
bgp_router_id_zebra_bump ();
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;
}
/* Called after event occured, this function change status and reset
read/write and timer thread. */
void
bgp_fsm_change_status (struct peer *peer, int status)
{
bgp_dump_state (peer, peer->status, status);
/* Transition into Clearing or Deleted must /always/ clear all routes..
* (and must do so before actually changing into Deleted..
*/
if (status >= Clearing)
bgp_clear_route_all (peer);
/* Preserve old status and change into new status. */
peer->ostatus = peer->status;
peer->status = status;
if (BGP_DEBUG (normal, NORMAL))
zlog_debug ("%s went from %s to %s",
peer->host,
LOOKUP (bgp_status_msg, peer->ostatus),
LOOKUP (bgp_status_msg, peer->status));
}
static int
bgp_graceful_stale_timer_expire (struct thread *thread)
{
struct peer *peer;
afi_t afi;
safi_t safi;
peer = THREAD_ARG (thread);
peer->t_gr_stale = NULL;
if (BGP_DEBUG (events, EVENTS))
zlog_debug ("%s graceful restart stalepath timer expired", peer->host);
/* NSF delete stale route */
for (afi = AFI_IP ; afi < AFI_MAX ; afi++)
for (safi = SAFI_UNICAST ; safi < SAFI_RESERVED_3 ; safi++)
if (peer->nsf[afi][safi])
bgp_clear_stale_route (peer, afi, safi);
return 0;
}
/* BGP try to connect to the peer. */
int
bgp_connect (struct peer *peer)
{
unsigned int ifindex = 0;
/* Make socket for the peer. */
peer->fd = sockunion_socket (&peer->su);
if (peer->fd < 0)
return -1;
/* If we can get socket for the peer, adjest TTL and make connection. */
if (peer_sort (peer) == BGP_PEER_EBGP)
sockopt_ttl (peer->su.sa.sa_family, peer->fd, peer->ttl);
sockopt_reuseaddr (peer->fd);
sockopt_reuseport (peer->fd);
/* Bind socket. */
bgp_bind (peer);
/* Update source bind. */
bgp_update_source (peer);
#ifdef HAVE_IPV6
if (peer->ifname)
ifindex = if_nametoindex (peer->ifname);
#endif /* HAVE_IPV6 */
if (BGP_DEBUG (events, EVENTS))
plog_info (peer->log, "%s [Event] Connect start to %s fd %d",
peer->host, peer->host, peer->fd);
#ifdef HAVE_TCP_SIGNATURE
if (CHECK_FLAG (peer->flags, PEER_FLAG_PASSWORD))
bgp_tcpsig_set (peer->fd, peer);
#endif /* HAVE_TCP_SIGNATURE */
/* Connect to the remote peer. */
return sockunion_connect (peer->fd, &peer->su, htons (peer->port), ifindex);
}
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;
}
/* BGP Network Routes Scan */
s_int32_t
bnh_network_scan (struct thread *t_network_scan)
{
struct lib_globals *blg;
struct bgp *bgp;
s_int32_t ret;
ret = 0;
bgp = THREAD_ARG (t_network_scan);
blg = THREAD_GLOB (t_network_scan);
if (! blg || &BLG != blg || ! bgp)
{
ret = -1;
goto EXIT;
}
bgp->t_network_scan = NULL;
BGP_SET_VR_CONTEXT (&BLG, bgp->owning_bvr);
if (BGP_DEBUG (normal, NORMAL))
zlog_info (&BLG, "[RIB] Scanning BGP Network Routes...");
bnh_network_scan_afi (bgp, AFI_IP);
#ifdef HAVE_IPV6
IF_BGP_CAP_HAVE_IPV6
bnh_network_scan_afi (bgp, AFI_IP6);
#endif /* HAVE_IPV6 */
if (bgp->network_scan_interval)
BGP_TIMER_ON (&BLG, bgp->t_network_scan, bgp, bnh_network_scan,
bgp->network_scan_interval);
EXIT:
return ret;
}
static int
bgp_interface_up (int command, struct zclient *zclient, zebra_size_t length)
{
struct stream *s;
struct interface *ifp;
struct connected *c;
struct listnode *node, *nnode;
s = zclient->ibuf;
ifp = zebra_interface_state_read (s);
if (! ifp)
return 0;
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("Zebra rcvd: interface %s up", ifp->name);
for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, c))
bgp_connected_add (c);
return 0;
}
/* Unset redistribution. */
int
bgp_redistribute_unset (struct bgp *bgp, afi_t afi, int type)
{
/* Unset flag from BGP instance. */
bgp->redist[afi][type] = 0;
/* Unset route-map. */
if (bgp->rmap[afi][type].name)
free (bgp->rmap[afi][type].name);
bgp->rmap[afi][type].name = NULL;
bgp->rmap[afi][type].map = NULL;
/* Unset metric. */
bgp->redist_metric_flag[afi][type] = 0;
bgp->redist_metric[afi][type] = 0;
/* Return if zebra connection is disabled. */
if (! vrf_bitmap_check (zclient->redist[type], VRF_DEFAULT))
return CMD_WARNING;
vrf_bitmap_unset (zclient->redist[type], VRF_DEFAULT);
if (bgp->redist[AFI_IP][type] == 0
&& bgp->redist[AFI_IP6][type] == 0
&& zclient->sock >= 0)
{
/* Send distribute delete message to zebra. */
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("Zebra send: redistribute delete %s",
zebra_route_string(type));
zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient, type,
VRF_DEFAULT);
}
/* Withdraw redistributed routes from current BGP's routing table. */
bgp_redistribute_withdraw (bgp, afi, type);
return CMD_SUCCESS;
}
/* Called after event occured, this function change status and reset
read/write and timer thread. */
void
bgp_fsm_change_status (struct peer *peer, int status)
{
bgp_dump_state (peer, peer->status, status);
/* Transition into Clearing or Deleted must /always/ clear all routes..
* (and must do so before actually changing into Deleted..
*/
if (status >= Clearing)
{
bgp_clear_route_all (peer);
/* If no route was queued for the clear-node processing, generate the
* completion event here. This is needed because if there are no routes
* to trigger the background clear-node thread, the event won't get
* generated and the peer would be stuck in Clearing. Note that this
* event is for the peer and helps the peer transition out of Clearing
* state; it should not be generated per (AFI,SAFI). The event is
* directly posted here without calling clear_node_complete() as we
* shouldn't do an extra unlock. This event will get processed after
* the state change that happens below, so peer will be in Clearing
* (or Deleted).
*/
if (!work_queue_is_scheduled (peer->clear_node_queue))
BGP_EVENT_ADD (peer, Clearing_Completed);
}
/* Preserve old status and change into new status. */
peer->ostatus = peer->status;
peer->status = status;
if (BGP_DEBUG (normal, NORMAL))
zlog_debug ("%s went from %s to %s",
peer->host,
LOOKUP (bgp_status_msg, peer->ostatus),
LOOKUP (bgp_status_msg, peer->status));
}
/* Other routes redistribution into BGP. */
int
bgp_redistribute_set (struct bgp *bgp, afi_t afi, int type)
{
/* Set flag to BGP instance. */
bgp->redist[afi][type] = 1;
/* Return if already redistribute flag is set. */
if (zclient->redist[type])
return CMD_WARNING;
zclient->redist[type] = 1;
/* Return if zebra connection is not established. */
if (zclient->sock < 0)
return CMD_WARNING;
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("Zebra send: redistribute add %s", zebra_route_string(type));
/* Send distribute add message to zebra. */
zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient, type);
return CMD_SUCCESS;
}