Re: IP checksum calculation

To:	Ramón Agüero <ramon@xxxxxxxxxxxxxxx>
Subject:	Re: IP checksum calculation
From:	Werner Almesberger <Werner.Almesberger@xxxxxxx>
Date:	Mon, 25 Sep 2000 23:42:13 +0200
Cc:	netdev@xxxxxxxxxxx
In-reply-to:	<002801c022e5$6a4a8e20$1bba90c1@xxxxxxxxxxxxxxx>; from ramon@xxxxxxxxxxxxxxx on Wed, Sep 20, 2000 at 11:30:23AM +0200
References:	<002801c022e5$6a4a8e20$1bba90c1@xxxxxxxxxxxxxxx>
Sender:	owner-netdev@xxxxxxxxxxx

Ramón Agüero wrote:
>     I've developped a module that gets IP_packets, and changes their TOS
> field, then I call the ip_fast_csum in order to change its checksum.

Better yet, do what we do in linux/include/net/dsfield.h:ipv4_change_dsfield
in recent 2.3 or 2.4 test kernels.

- Werner

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