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

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Date:	Wed, 13 Sep 2006 09:46:40 -0500
From:	"David M. Lloyd" <dmlloyd@...rg.com>
To:	Peter Lezoch <pledr@...nline.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Error binding socket: address already in use

On Wed, 2006-09-13 at 14:41 +0000, Peter Lezoch wrote:
> 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. A subsequently started task, that wants to use the same port, gets from bind above error message.This is, in my opinion, wrong behavior, because of the connectionless nature of UDP. Only reboot solves this situation. It looks, as if in net/socket.c, TCP and UDP are handled in the same way without taking into account the different nature of the protocols?!
> How can I overcome this problem ?

Perhaps SO_REUSEADDR is what you're looking for?

man 7 socket

- DML

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