Bgp bfd and its ilk

bgpd/bgp_bfd.c

@@ -151,7 +151,7 @@ void bgp_peer_config_apply(struct peer *p, struct peer_group *pg)
 
 void bgp_peer_bfd_update_source(struct peer *p)
 {
-	struct bfd_session_params *session = p->bfd_config->session;
+	struct bfd_session_params *session;
 	const union sockunion *source = NULL;
 	bool changed = false;
 	int family;
@@ -162,6 +162,10 @@ void bgp_peer_bfd_update_source(struct peer *p)
 	struct interface *ifp;
 	union sockunion addr;
 
+	if (!p->bfd_config)
+		return;
+
+	session = p->bfd_config->session;
 	/* Nothing to do for groups. */
 	if (CHECK_FLAG(p->sflags, PEER_STATUS_GROUP))
 		return;

bgpd/bgp_fsm.c

@@ -1826,7 +1826,7 @@ static void bgp_connect_in_progress_update_connection(struct peer *peer)
 static enum bgp_fsm_state_progress bgp_start(struct peer_connection *connection)
 {
 	struct peer *peer = connection->peer;
-	int status;
+	enum connect_result status;
 
 	bgp_peer_conf_if_to_su_update(connection);
 

bgpd/bgp_network.c

@@ -762,7 +762,7 @@ static int bgp_update_source(struct peer_connection *connection)
 }
 
 /* BGP try to connect to the peer.  */
-int bgp_connect(struct peer_connection *connection)
+enum connect_result bgp_connect(struct peer_connection *connection)
 {
 	struct peer *peer = connection->peer;
 
@@ -773,7 +773,7 @@ int bgp_connect(struct peer_connection *connection)
 	if (peer->conf_if && BGP_CONNECTION_SU_UNSPEC(connection)) {
 		if (bgp_debug_neighbor_events(peer))
 			zlog_debug("Peer address not learnt: Returning from connect");
-		return 0;
+		return connect_error;
 	}
 	frr_with_privs(&bgpd_privs) {
 		/* Make socket for the peer. */
@@ -787,7 +787,7 @@ int bgp_connect(struct peer_connection *connection)
 			zlog_debug("%s: Failure to create socket for connection to %s, error received: %s(%d)",
 				   __func__, peer->host, safe_strerror(errno),
 				   errno);
-		return -1;
+		return connect_error;
 	}
 
 	set_nonblocking(connection->fd);
@@ -808,7 +808,7 @@ int bgp_connect(struct peer_connection *connection)
 				   __func__, peer->host, safe_strerror(errno),
 				   errno);
 
-		return -1;
+		return connect_error;
 	}
 
 	sockopt_reuseaddr(connection->fd);
@@ -844,7 +844,7 @@ int bgp_connect(struct peer_connection *connection)
 	/* If the peer is passive mode, force to move to Active mode. */
 	if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSIVE)) {
 		BGP_EVENT_ADD(connection, TCP_connection_open_failed);
-		return BGP_FSM_SUCCESS;
+		return connect_error;
 	}
 
 	if (peer->conf_if || peer->ifname)

bgpd/bgp_network.h

@@ -21,7 +21,7 @@ extern int bgp_socket(struct bgp *bgp, unsigned short port,
 		      const char *address);
 extern void bgp_close_vrf_socket(struct bgp *bgp);
 extern void bgp_close(void);
-extern int bgp_connect(struct peer_connection *connection);
+extern enum connect_result bgp_connect(struct peer_connection *connection);
 extern int bgp_getsockname(struct peer *peer);
 extern void bgp_updatesockname(struct peer *peer);
 

bgpd/bgp_nexthop.c

@@ -32,6 +32,7 @@
 #include "bgpd/bgp_vty.h"
 #include "bgpd/bgp_rd.h"
 #include "bgpd/bgp_mplsvpn.h"
+#include "bgpd/bgp_bfd.h"
 
 DEFINE_MTYPE_STATIC(BGPD, MARTIAN_STRING, "BGP Martian Addr Intf String");
 
@@ -409,17 +410,6 @@ void bgp_connected_add(struct bgp *bgp, struct connected *ifc)
 			bgp_dest_set_bgp_connected_ref_info(dest, bc);
 		}
 
-		for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
-			if (peer->conf_if &&
-			    (strcmp(peer->conf_if, ifc->ifp->name) == 0) &&
-			    !peer_established(peer->connection) &&
-			    !CHECK_FLAG(peer->flags, PEER_FLAG_IFPEER_V6ONLY)) {
-				connection = peer->connection;
-				if (peer_active(peer))
-					BGP_EVENT_ADD(connection, BGP_Stop);
-				BGP_EVENT_ADD(connection, BGP_Start);
-			}
-		}
 	} else if (addr->family == AF_INET6) {
 		apply_mask_ipv6((struct prefix_ipv6 *)&p);
 
@@ -443,6 +433,22 @@ void bgp_connected_add(struct bgp *bgp, struct connected *ifc)
 			bgp_dest_set_bgp_connected_ref_info(dest, bc);
 		}
 	}
+
+	/*
+	 * Iterate over all the peers and attempt to set the bfd session
+	 * data and if it's a bgp unnumbered get her flowing if necessary
+	 */
+	for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
+		bgp_peer_bfd_update_source(peer);
+		if (peer->conf_if && (strcmp(peer->conf_if, ifc->ifp->name) == 0) &&
+		    !peer_established(peer->connection) &&
+		    !CHECK_FLAG(peer->flags, PEER_FLAG_IFPEER_V6ONLY)) {
+			connection = peer->connection;
+			if (peer_active(peer))
+				BGP_EVENT_ADD(connection, BGP_Stop);
+			BGP_EVENT_ADD(connection, BGP_Start);
+		}
+	}
 }
 
 void bgp_connected_delete(struct bgp *bgp, struct connected *ifc)

tests/topotests/zebra_fec_nexthop_resolution/r1/bgpd.conf

@@ -1,12 +1,14 @@
 !
 router bgp 65500
+ timers bgp 3 9
  bgp router-id 192.0.2.1
  neighbor 192.0.2.3 remote-as 65500
  neighbor 192.0.2.3 update-source lo
  neighbor 192.0.2.7 remote-as 65500
  neighbor 192.0.2.7 ttl-security hops 10
  neighbor 192.0.2.7 disable-connected-check
  neighbor 192.0.2.7 update-source lo
+ neighbor 192.0.2.7 timers connect 5
  !
  address-family ipv4 unicast
   network 192.0.2.1/32

tests/topotests/zebra_fec_nexthop_resolution/r2/bgpd.conf

@@ -1,4 +1,5 @@
 router bgp 65500
+ timers bgp 3 9
  bgp router-id 192.0.2.2
  neighbor 192.0.2.1 remote-as 65500
  neighbor 192.0.2.1 update-source lo

tests/topotests/zebra_fec_nexthop_resolution/r3/bgpd.conf

@@ -1,4 +1,5 @@
 router bgp 65500
+ timers bgp 3 9
  bgp router-id 192.0.2.3
  neighbor 192.0.2.1 remote-as 65500
  neighbor 192.0.2.1 update-source lo

tests/topotests/zebra_fec_nexthop_resolution/r4/bgpd.conf

@@ -1,5 +1,6 @@
 !
 router bgp 65500
+ timers bgp 3 9
  bgp router-id 192.0.2.4
  neighbor 192.0.2.1 remote-as 65500
  neighbor 192.0.2.1 ttl-security hops 10

tests/topotests/zebra_fec_nexthop_resolution/r5/bgpd.conf

@@ -1,4 +1,5 @@
 router bgp 65500
+ timers bgp 3 9
  bgp router-id 192.0.2.5
  neighbor 192.0.2.3 remote-as 65500
  neighbor 192.0.2.3 update-source lo

tests/topotests/zebra_fec_nexthop_resolution/r7/bgpd.conf

@@ -1,10 +1,12 @@
 !
 router bgp 65500
+ timers bgp 3 9
  bgp router-id 192.0.2.7
  neighbor 192.0.2.1 remote-as 65500
  neighbor 192.0.2.1 ttl-security hops 10
  neighbor 192.0.2.1 disable-connected-check
  neighbor 192.0.2.1 update-source lo
+ neighbor 192.0.2.1 timers connect 5
  neighbor 192.0.2.5 remote-as 65500
  neighbor 192.0.2.5 update-source lo
  !

tests/topotests/zebra_fec_nexthop_resolution/test_zebra_fec_nexthop_resolution.py

@@ -156,16 +156,17 @@ def test_zebra_fec_nexthop_resolution_bgp():
     def _check_bgp_session():
         r1 = tgen.gears["r1"]
 
-        tgen.gears["r3"].vtysh_cmd("config \n no mpls fec nexthop-resolution \n end")
-        tgen.gears["r3"].vtysh_cmd("config \n mpls fec nexthop-resolution \n end")
-        tgen.gears["r5"].vtysh_cmd("config \n no mpls fec nexthop-resolution \n end")
-        tgen.gears["r5"].vtysh_cmd("config \n mpls fec nexthop-resolution \n end")
         output = json.loads(r1.vtysh_cmd("show bgp summary json"))
 
         if output["ipv4Unicast"]["peers"]["192.0.2.7"]["state"] == "Established":
             return None
         return False
 
+    tgen.gears["r3"].vtysh_cmd("config \n no mpls fec nexthop-resolution \n end")
+    tgen.gears["r3"].vtysh_cmd("config \n mpls fec nexthop-resolution \n end")
+    tgen.gears["r5"].vtysh_cmd("config \n no mpls fec nexthop-resolution \n end")
+    tgen.gears["r5"].vtysh_cmd("config \n mpls fec nexthop-resolution \n end")
+
     test_func1 = functools.partial(_check_bgp_session)
     _, result1 = topotest.run_and_expect(test_func1, None, count=60, wait=0.5)
     assert result1 is None, "Failed to verify the fec_nexthop_resolution: bgp session"