Fail early in send_udp_probe_packet().

[tinc] / src / net_packet.c

diff --git a/src/net_packet.c b/src/net_packet.c
index ac70d6b..8a5460c 100644 (file)
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@ -1085,14 +1085,14 @@ static void try_sptps(node_t *n) {
 
 static void send_udp_probe_packet(node_t *n, int len) {
        vpn_packet_t packet;
-       packet.offset = DEFAULT_PACKET_OFFSET;
-       memset(DATA(&packet), 0, 14);
 
        if(len > sizeof(packet.data)) {
                logger(DEBUG_TRAFFIC, LOG_INFO, "Truncating probe length %d to %s (%s)", len, n->name, n->hostname);
                len = sizeof(packet.data);
        }
 
+       packet.offset = DEFAULT_PACKET_OFFSET;
+       memset(DATA(&packet), 0, 14);
        randomize(DATA(&packet) + 14, len - 14);
        packet.len = len;
        packet.priority = 0;