--- nemesis-1.4-orig/source/src/nemesis-proto_tcp.c	Fri Oct 31 16:29:38 2003
+++ nemesis-1.4/source/src/nemesis-proto_tcp.c	Fri May 19 17:31:13 2006
@@ -16,7 +16,7 @@
         FileData *ipod, FileData *tcpod, char *device)
 {
    int n;
-   u_int32_t tcp_packetlen = 0, tcp_meta_packetlen = 0;
+   u_int32_t tcp_packetlen = 0, tcp_meta_packetlen = 0, tcp_headerlen = 0, ip_headerlen = 0;
    static u_int8_t *pkt;
    static int sockfd = -1;
    struct libnet_link_int *l2 = NULL;
@@ -58,13 +58,20 @@
 #endif
     }
 
+    ip_headerlen = LIBNET_IP_H + ipod->file_s;
+    tcp_headerlen = LIBNET_TCP_H + tcpod->file_s;
+
     tcp_packetlen = link_offset + LIBNET_IP_H + LIBNET_TCP_H + pd->file_s + 
             ipod->file_s + tcpod->file_s;
 
-    tcp_meta_packetlen = tcp_packetlen - (link_offset + LIBNET_IP_H);
+    tcp_meta_packetlen = LIBNET_TCP_H + pd->file_s;
 
 #ifdef DEBUG
+    printf("DEBUG: link offsetlength %u.\n", link_offset);
+    printf("DEBUG: IP header  length %u.\n", ip_headerlen);
+    printf("DEBUG: TCP header length %u.\n", tcp_headerlen);
     printf("DEBUG: TCP packet length %u.\n", tcp_packetlen);
+    printf("DEBUG: TCP meta   length %u.\n", tcp_meta_packetlen);
     printf("DEBUG: IP  options size  %u.\n", ipod->file_s);
     printf("DEBUG: TCP options size  %u.\n", tcpod->file_s);
     printf("DEBUG: TCP payload size  %u.\n", pd->file_s);