linux-kernel - Re: Error binding socket: address already in use

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Date:	Wed, 13 Sep 2006 16:23:35 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Peter Lezoch <pledr@...nline.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Error binding socket: address already in use

Ar Mer, 2006-09-13 am 14:41 +0000, ysgrifennodd Peter Lezoch:
> Hi,
> killing a server task that is operating on a UDP socket( AF_INET,
> SOCK_DGRAM, IPPROTO_UDP ), leaves the socket in an unclosed state. 

For UDP the socket closes at the point the last user of the socket
closes. For TCP there is a time delay mandated by the specification.

If you are seeing UDP sockets remain open when you kill a server make
sure it hasn't forked other processes and passed them the file handle.

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