Re: problem in tcp checksum?

The latest version of libnet 1.1.x, to be released soon, has this and 
other bugs fixed.

On Dec 3, 2004, at 3:38 PM, Shai Rubin wrote:

> Dear libnet users/developers,
>
> I have recently switched from libnet version 1.1.0 to version 1.1.2.1.
>
> Unfortunately, my code stops working.
>
>
> It seems to me that there is a problem in the tcp checksum mechanism 
> in the new version. When I trace my packets with tcpdump I get "bad 
> tcp cksum" if a packet that I send has an odd number of bytes. If the 
> packet has an even number of bytes, then the tcp checksum is OK. This 
> does not happen when I compile my program with the older version of 
> libnet.
>
> Anyone has a similar problem?
>
> Thanks,
>
> Shai Rubin
>
>
>
>
--
Mike Schiffman, CISSP
http://www.packetfactory.net/schiffman
Doveryay No Proveryay