diff options
| -rw-r--r-- | staging/layer4.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/staging/layer4.c b/staging/layer4.c index ca4d229..a4431a1 100644 --- a/staging/layer4.c +++ b/staging/layer4.c @@ -146,7 +146,8 @@ libnet_ptag_t create_udp_packet (libnet_t *l) char argval[MAX_PAYLOAD_SIZE]; int T; // only an abbreviation for tx.packet_mode int i; - + int udp_sum_set = 0; + ///////////////////////////// // Default UDP header fields // Already reset in init.c @@ -216,6 +217,7 @@ libnet_ptag_t create_udp_packet (libnet_t *l) if (getarg(tx.arg_string,"udp_sum", argval)==1) { tx.udp_sum = (u_int16_t) str2int(argval); + udp_sum_set = 1; } @@ -277,7 +279,7 @@ libnet_ptag_t create_udp_packet (libnet_t *l) 0); // Checksum overwrite? Libnet IPv6 checksum calculation can't deal with extension headers, we have to do it ourself... - libnet_toggle_checksum(l, t, (tx.udp_sum || ipv6_mode) ? LIBNET_OFF : LIBNET_ON); + libnet_toggle_checksum(l, t, (udp_sum_set || ipv6_mode) ? LIBNET_OFF : LIBNET_ON); if (t == -1) { |