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 4ec70fa..b9f1957 100644 (file)
--- 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;