From owner-freebsd-net@FreeBSD.ORG Thu Dec 7 12:14:43 2006 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 4A9A616A40F for ; Thu, 7 Dec 2006 12:14:43 +0000 (UTC) (envelope-from rrs@cisco.com) Received: from sj-iport-5.cisco.com (sj-iport-5.cisco.com [171.68.10.87]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1E24A43CA6 for ; Thu, 7 Dec 2006 12:13:51 +0000 (GMT) (envelope-from rrs@cisco.com) Received: from sj-dkim-8.cisco.com ([171.68.10.93]) by sj-iport-5.cisco.com with ESMTP; 07 Dec 2006 04:14:42 -0800 Received: from sj-core-4.cisco.com (sj-core-4.cisco.com [171.68.223.138]) by sj-dkim-8.cisco.com (8.12.11/8.12.11) with ESMTP id kB7CEgUv024189; Thu, 7 Dec 2006 04:14:42 -0800 Received: from xbh-sjc-221.amer.cisco.com (xbh-sjc-221.cisco.com [128.107.191.63]) by sj-core-4.cisco.com (8.12.10/8.12.6) with ESMTP id kB7CEbOZ014521; Thu, 7 Dec 2006 04:14:40 -0800 (PST) Received: from xfe-sjc-212.amer.cisco.com ([171.70.151.187]) by xbh-sjc-221.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.1830); Thu, 7 Dec 2006 04:14:36 -0800 Received: from [127.0.0.1] ([171.68.225.134]) by xfe-sjc-212.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.1830); Thu, 7 Dec 2006 04:14:36 -0800 Message-ID: <4578057B.9080002@cisco.com> Date: Thu, 07 Dec 2006 07:13:47 -0500 From: Randall Stewart User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20050920 X-Accept-Language: en-us, en MIME-Version: 1.0 To: maillist ifiaas References: <161d69110612060709n3bf99bd4y47d94b021b8f1d02@mail.gmail.com> <4577D858.4010300@freebsd.org> <2786D1DE-E8FA-490C-AFF7-E458E262AEF7@lurchi.franken.de> <161d69110612070242p612e2318ya8d285a15a54e9fc@mail.gmail.com> In-Reply-To: <161d69110612070242p612e2318ya8d285a15a54e9fc@mail.gmail.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 07 Dec 2006 12:14:36.0148 (UTC) FILETIME=[42CAB340:01C719F9] DKIM-Signature: v=0.5; a=rsa-sha256; q=dns/txt; l=682; t=1165493682; x=1166357682; c=relaxed/relaxed; s=sjdkim8002; h=Content-Type:From:Subject:Content-Transfer-Encoding:MIME-Version; d=cisco.com; i=rrs@cisco.com; z=From:=20Randall=20Stewart=20 |Subject:=20Re=3A=20Urel, =20a=20TCP=20option=20for=20Unreliable=20Streami ng.=20Need=20your=20help. |Sender:=20; bh=5rXeDYBGIAIU5eT/eshcudOqmsGaQkyJlW5/1D9ud1E=; b=hXsrCTqY11cDCMFGIsu9AD3KYPkE4VYTm964n9DivTST2OAPXDOer2FUIBGokGDNK+h6BW0b 5P7EDFSj0OhGy4+x311cN/9okRwYoArLTxXu2a6D2V4RipE/IH3OqKLh; Authentication-Results: sj-dkim-8; header.From=rrs@cisco.com; dkim=pass (sig from cisco.com/sjdkim8002 verified; ); Cc: Michael Tuexen , freebsd-net@freebsd.org Subject: Re: Urel, a TCP option for Unreliable Streaming. Need your help. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Dec 2006 12:14:43 -0000 maillist ifiaas wrote: > Michael, > > In PR-SCTP where retranmission is set off, does it allows the > applications to know which part of data is lost in the stream? > Thanks Yep.. you subscribe for a notification event and SCTP will return you the data that was not sent. So not only does it let you know you can actually let SCTP hold and return the data that did not get acknowledged.. The API also has a context so you can attach a user defined 32 bit value to the data.. to say bind a pointer to an object to the actual data... for lookup or other stuff :-) R > -- Randall Stewart NSSTG - Cisco Systems Inc. 803-345-0369 803-317-4952 (cell)