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UDP --badsum fix

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doug
2007-01-23 03:17:32 +00:00
parent d13d4a869e
commit a869a1df8f
1 changed files with 3 additions and 1 deletions
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4
tcpip.cc
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@@ -1679,8 +1679,10 @@ u8 *build_udp_raw(struct in_addr *source, const struct in_addr *victim,
sizeof(udphdr_bsd) + datalen, (char *) udp);
#endif
if ( o.badsum )
if ( o.badsum ) {
--udp->uh_sum;
if (udp->uh_sum == 0) udp->uh_sum = 0xffff; // UDP checksum=0 means no checksum
}
fill_ip_raw(ip, packetlen, ipopt, ipoptlen,
tos, ipid, df?IP_DF:0, myttl, IPPROTO_UDP,