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

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Message-ID: <Pine.LNX.4.61.0609131130180.27566@chaos.analogic.com>
Date:	Wed, 13 Sep 2006 11:33:12 -0400
From:	"linux-os \(Dick Johnson\)" <linux-os@...logic.com>
To:	"Peter Lezoch" <pledr@...nline.de>
Cc:	<linux-kernel@...r.kernel.org>
Subject: Re: Error binding socket: address already in use

On Wed, 13 Sep 2006, 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 ?
>
> kind regards
>
> peter lezoch

Try:
  int opt = 1;
  setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));

Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.24 on an i686 machine (5592.66 BogoMips).
New book: http://www.AbominableFirebug.com/
_
..

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