From 35ac9b53f2e2b4d33f9ae7f930df38d15408efa4 Mon Sep 17 00:00:00 2001
From: Philippe Guibert <philippe.guibert@6wind.com>
Date: Thu, 19 Jan 2023 11:04:37 +0100
Subject: [PATCH] bgpd: fix vpnv6 nexthop encoding

In ipv6 vpn, when the global and the local ipv6 address are received,
when re-transmitting the bgp ipv6 update, the nexthop attribute
length must still be 48 bytes.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
---
 bgpd/bgp_attr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c
index 4306d3bd12..e60c1bb8dc 100644
--- a/bgpd/bgp_attr.c
+++ b/bgpd/bgp_attr.c
@@ -4028,8 +4028,8 @@ size_t bgp_packet_mpattr_start(struct stream *s, struct peer *peer, afi_t afi,
 			}
 		} break;
 		case SAFI_MPLS_VPN: {
-			if (attr->mp_nexthop_len
-				   == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) {
+			if (attr->mp_nexthop_len ==
+			    BGP_ATTR_NHLEN_VPNV6_GLOBAL_AND_LL) {
 				stream_putc(s, 48);
 				stream_putl(s, 0); /* RD = 0, per RFC */
 				stream_putl(s, 0);