netdev - Re: rare bad TCP checksum with 2.6.19?

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Date:	Tue, 16 Jan 2007 00:36:50 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Michael Tokarev <mjt@....msk.ru>
CC:	Herbert Xu <herbert@...dor.apana.org.au>, netdev@...r.kernel.org
Subject: Re: rare bad TCP checksum with 2.6.19?

Michael Tokarev a écrit :
> Eric Dumazet wrote:
>> Michael Tokarev a e'crit :
>>> Any idea how to force sending FIN-with-data?
>> int flag_on = 1;
>> setsockopt(fd, SOL_TCP, TCP_CORK, &flag_on, sizeof(int));
>> send(fd, data, datalen, 0);
>> close(fd);
> 
> That produces two packets - one (or more - depending on the
> size) data packet and one FIN packet w/o any data.
> 
> This is the first thing I've tried.

This may be because I forgot the shutdown() ?

int flag_on = 1;
setsockopt(fd, SOL_TCP, TCP_CORK, &flag_on, sizeof(int));
send(fd, data, datalen, 0);
shutdown(fd, 1);
close(fd);

At least this is working on my machines (with and without shutdown())

Eric
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