From c1c6298dd3d7fbcc5b19c1e3692aac9eb2e6cade Mon Sep 17 00:00:00 2001 From: Donald Sharp Date: Wed, 20 Nov 2024 16:07:34 -0500 Subject: [PATCH] bgpd: Allow bfd to work if peer known but interface address not yet If bgp is coming up and bgp has not received the interface address yet but bgp has knowledge about a bfd peering, allow it to set the peering data appropriately. Signed-off-by: Donald Sharp --- bgpd/bgp_bfd.c | 6 +++++- bgpd/bgp_nexthop.c | 28 +++++++++++++++++----------- 2 files changed, 22 insertions(+), 12 deletions(-) diff --git a/bgpd/bgp_bfd.c b/bgpd/bgp_bfd.c index a331585d3291..50b00d21b195 100644 --- a/bgpd/bgp_bfd.c +++ b/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; diff --git a/bgpd/bgp_nexthop.c b/bgpd/bgp_nexthop.c index 357d5292dabb..bf0f3b15cfde 100644 --- a/bgpd/bgp_nexthop.c +++ b/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)