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Network Security Libnet
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Re: IP cheksum and libnet_pblock_coalesce

from [Kenichi MORI] Network Security [Permanent Link]
Subject: Re: IP cheksum and libnet_pblock_coalesce
Date: Fri, 24 Sep 2004 20:08:19 -0700 
Hello,

 Raynal wrote:


I dont understand why you call libnet_ip_check() :
u_int16_t
libnet_ip_check(u_int16_t *addr, int len)
{
    int sum;

    sum = libnet_in_cksum(addr, len);
    return (LIBNET_CKSUM_CARRY(sum));
}

When you call libnet_pblock_coalesce() checksums are computed, so you
dont have to force any re-computation.

      Fred


My situation was little different, I only use libnet_build_ipv4() &
libnet_build_tcp() functions.

But, I'm sorry I missed the messages #1513.
I think if I applied the pache, I was able to resolve the problem.
(Now that I changed my code and there is no error).

Thanks.

-Kenichi
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