From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Mon, 24 Mar 2025 16:03:41 +0000 (+0100)
Subject: BGP: Fix missing case for decoding link-local next hops in VPN SAFI
X-Git-Tag: v2.17~27
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=cfa6cf296ae0038cbc3b5255c6c6c5d093e700fe;p=thirdparty%2Fbird.git

BGP: Fix missing case for decoding link-local next hops in VPN SAFI
---

diff --git a/proto/bgp/packets.c b/proto/bgp/packets.c
index bfb8c672e..4ee7c5a5f 100644
--- a/proto/bgp/packets.c
+++ b/proto/bgp/packets.c
@@ -1448,6 +1448,9 @@ bgp_decode_next_hop_vpn(struct bgp_parse_state *s, byte *data, uint len, rta *a)
     nh[0] = ipa_from_ip6(get_ip6(data+8));
     nh[1] = ipa_from_ip6(get_ip6(data+32));
 
+    if (ipa_is_link_local(nh[0]))
+    { nh[1] = nh[0]; nh[0] = IPA_NONE; }
+
     if (ipa_is_ip4(nh[0]) || !ip6_is_link_local(nh[1]))
       nh[1] = IPA_NONE;
   }