Leave 14 bytes for legacy MTU probing

diff --git a/src/libmeshlink.c b/src/libmeshlink.c
index 00eaa09cd1e6cedd2e06326dbe712e8480ab4509..67d945e04800752940204324c4d6cbd0e864d78f 100644 (file)
--- a/src/libmeshlink.c
+++ b/src/libmeshlink.c
@@ -565,7 +565,7 @@ bool tinc_send_packet(node_t *receiver, const char* buf, unsigned int len) {
        vpn_packet_t packet;
        tincpackethdr* hdr = malloc(sizeof(tincpackethdr));
 
-       if (sizeof(hdr) + len > MAXSIZE) {
+       if (14 + sizeof(hdr) + len > MAXSIZE) {
 
        //log something
        return false;
@@ -577,8 +577,9 @@ bool tinc_send_packet(node_t *receiver, const char* buf, unsigned int len) {
        packet.priority = 0;
        packet.len = sizeof(tincpackethdr) + len;
 
-       memcpy(packet.data,hdr,32);
-       memcpy(packet.data+32,buf,len);
+    memset(packet.data,1,14);
+    memcpy(packet.data+14,hdr,32);
+       memcpy(packet.data+32+14,buf,len);
 
         myself->in_packets++;
         myself->in_bytes += packet.len;