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Message-ID: <e46c534c0512131242n3ad87709kfd0fc9238137f897@mail.gmail.com>
Date: Tue, 13 Dec 2005 20:42:49 +0000
From: Filipe Cabecinhas <filcab@gmail.com>
To: "linux-os (Dick Johnson)" <linux-os@analogic.com>
Subject: Re: Possible problem in fcntl
Cc: Linux kernel <linux-kernel@vger.kernel.org>,
       Nuno Lopes <ncpl@mega.ist.utl.pt>,
       Renato Crissstomo <racc@mega.ist.utl.pt>
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> How do you know what wget did after the connection was refused?
> Didn't it close its socket when returning to the shell?

If we have the call to fcntl, the following happens:
Telnet: SYN
Server: SYN, ACK
T: ACK
S: FIN, ACK
T: FIN, ACK
S: ACK

There was no data exchanged. It just accepted the connection, and then
finished it.

Without the call to fcntl everything goes normally:
T: SYN
S: SYN, ACK
T: ACK
T: PSH, ACK (HTTP request)
S: ACK
S: PSH, ACK (HTTP header)
T: ACK
S: PSH, ACK (data)
T: ACK
S: FIN, ACK
T: ACK
T: FIN, ACK
S: ACK

Thanks in advance,

Filipe Cabecinhas