From: Etienne Dechamps <etienne@edechamps.fr>
Date: Sat, 27 Sep 2014 16:51:33 +0000 (+0100)
Subject: Fix protocol version check for type 2 MTU probe replies.
X-Git-Tag: release-1.1pre11~40
X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=commitdiff_plain;h=f57d53c3ad9af89489e15a8cfd94b56937bf3179

Fix protocol version check for type 2 MTU probe replies.

Currently tinc only uses type 2 MTU probe replies if the recipient uses
protocol version 17.3. It should of course support any higher minor
protocol version as well.
---

diff --git a/src/net_packet.c b/src/net_packet.c
index 4ec70fa6..b9f1957b 100644
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@ -182,7 +182,7 @@ static void mtu_probe_h(node_t *n, vpn_packet_t *packet, length_t len) {
 		/* It's a probe request, send back a reply */
 
 		/* Type 2 probe replies were introduced in protocol 17.3 */
-		if ((n->options >> 24) == 3) {
+		if ((n->options >> 24) >= 3) {
 			uint8_t* data = packet->data;
 			*data++ = 2;
 			uint16_t len16 = htons(len); memcpy(data, &len16, 2); data += 2;