From e16b0aef31adf7000c22430adc3ceb9fc969ae14 Mon Sep 17 00:00:00 2001
From: "Ondrej Zajicek (work)" <santiago@crfreenet.org>
Date: Wed, 2 Jan 2019 15:57:14 +0100
Subject: [PATCH] BGP: Postpone setting link_addr

It may happen that the LLv6 address for given iface is not defined during
BGP start, so we postpone the check to the the session establishment.
---
 proto/bgp/bgp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c
index fb6c9881..ceeec727 100644
--- a/proto/bgp/bgp.c
+++ b/proto/bgp/bgp.c
@@ -505,6 +505,10 @@ bgp_conn_enter_established_state(struct bgp_conn *conn)
   if (ipa_zero(p->source_addr))
     p->source_addr = conn->sk->saddr;
 
+  /* In case of LLv6 is not valid during BGP start */
+  if (ipa_zero(p->link_addr) && p->neigh && p->neigh->iface && p->neigh->iface->llv6)
+    p->link_addr = p->neigh->iface->llv6->ip;
+
   conn->sk->fast_rx = 0;
 
   p->conn = conn;