From: Benoît Ganne <bganne@cisco.com>
Date: Thu, 18 Aug 2022 14:49:17 +0000 (+0200)
Subject: wireguard: fix ipv6 handshake packet
X-Git-Tag: v23.02-rc0~85
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=fa7441ffc2552529784d15bb4c8450cf164281d6;p=vpp.git

wireguard: fix ipv6 handshake packet

IPv6 payload length should not include the size of the IPv6 header.

Type: fix

Change-Id: Iedcd17d0af8d72d9b5f8f9b605da7c99e151bc9d
Signed-off-by: Benoît Ganne <bganne@cisco.com>
---

diff --git a/src/plugins/wireguard/wireguard_send.c b/src/plugins/wireguard/wireguard_send.c
index 93e808ad050..91d993bee15 100644
--- a/src/plugins/wireguard/wireguard_send.c
+++ b/src/plugins/wireguard/wireguard_send.c
@@ -70,10 +70,8 @@ wg_buffer_prepend_rewrite (vlib_buffer_t *b0, const u8 *rewrite, u8 is_ip4)
       /* copy only ip6 and udp header; wireguard header not needed */
       clib_memcpy (hdr6, rewrite, sizeof (ip6_udp_header_t));
 
-      hdr6->udp.length =
+      hdr6->ip6.payload_length = hdr6->udp.length =
 	clib_host_to_net_u16 (b0->current_length - sizeof (ip6_header_t));
-
-      hdr6->ip6.payload_length = clib_host_to_net_u16 (b0->current_length);
     }
 }