Date: Fri, 11 Oct 2002 14:57:40 +0330 From: "soheil hassas yeganeh" <soheil_h_y@hotmail.com> To: freebsd-net@FreeBSD.ORG Subject: IP bad cksum (0!) Message-ID: <F83YiMCIqtQvAauNjVu0000036e@hotmail.com>
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Hi list
to recompute the checksum of the ip packets i wrote this lines in the
ip_input.c files :
ip->ip_sum =0 ;
if(hlen == sizeof(struct ip))
ip->ip_sum = in_cksum_hdr(ip);
else
ip->ip_sum = in_cksum(m,hlen);
When i make a dump it says that it has bad cksum 0!
12:25:11.858759 62.217.112.165 > 66.201.71.98: icmp: echo reply (ttl 42, id
17879, len 84, bad cksum 0!)
I don't know why this doesn't work ??????
THANX
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