From owner-freebsd-net@FreeBSD.ORG  Wed Aug 25 12:23:12 2010
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C06FE10656A8
	for <freebsd-net@freebsd.org>; Wed, 25 Aug 2010 12:23:12 +0000 (UTC)
	(envelope-from rpaulo@freebsd.org)
Received: from karen.lavabit.com (karen.lavabit.com [72.249.41.33])
	by mx1.freebsd.org (Postfix) with ESMTP id 9A8B88FC1C
	for <freebsd-net@freebsd.org>; Wed, 25 Aug 2010 12:23:12 +0000 (UTC)
Received: from d.earth.lavabit.com (d.earth.lavabit.com [192.168.111.13])
	by karen.lavabit.com (Postfix) with ESMTP id 8481224EDAD;
	Wed, 25 Aug 2010 07:03:55 -0500 (CDT)
Received: from 10.0.10.3 (221.163.108.93.rev.vodafone.pt [93.108.163.221])
	by lavabit.com with ESMTP id 8IPL2EFBXAFV;
	Wed, 25 Aug 2010 07:03:55 -0500
Mime-Version: 1.0 (Apple Message framework v1081)
Content-Type: text/plain; charset=us-ascii
From: Rui Paulo <rpaulo@FreeBSD.org>
In-Reply-To: <AANLkTi=EEDof1GB_-X2w9WSPVkWL=_Uwuy9j7ema+Zag@mail.gmail.com>
Date: Wed, 25 Aug 2010 13:03:52 +0100
Content-Transfer-Encoding: 7bit
Message-Id: <FD750DF3-BB2B-495F-A211-A1FDE7E118CE@FreeBSD.org>
References: <AANLkTi=EEDof1GB_-X2w9WSPVkWL=_Uwuy9j7ema+Zag@mail.gmail.com>
To: Sadish Kulasekere <sadishkr@gmail.com>
X-Mailer: Apple Mail (2.1081)
Cc: freebsd-net@freebsd.org
Subject: Re: FreeBSD Kernel Timers
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 25 Aug 2010 12:23:12 -0000


On 25 Aug 2010, at 12:31, Sadish Kulasekere wrote:

> Hi,
> 
> Does anyone know how to create a timer in the kernel? I want to execute a
> function after 1s and 3s and I want to create multiple instances of the
> timer. The requirement here is to invoke a function after receiving a SYN
> packet and then after 10s remove the perticular timer corresponding to that
> SYN. This should be done for each SYN received.

Read the callout API man page: callout(9).

Regards,
--
Rui Paulo