From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751289AbdALJvP (ORCPT ); Thu, 12 Jan 2017 04:51:15 -0500 Received: from smtp-out4.electric.net ([192.162.216.183]:55032 "EHLO smtp-out4.electric.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751183AbdALJvN (ORCPT ); Thu, 12 Jan 2017 04:51:13 -0500 From: David Laight To: "'Sun Paul'" , Neil Horman CC: "linux-sctp@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: RE: Problem on SCTP Thread-Topic: Problem on SCTP Thread-Index: AQHSaACC7+hIZPmNnUGSq7HBsSmGZaErYzKAgAQHN4CAAICIMIAAA4AAgAAojACAAESJgIAALsOAgABoAoCAANrUAIABL1GAgABH/QCAAVieAIAABXvQ Date: Thu, 12 Jan 2017 09:51:00 +0000 Message-ID: <063D6719AE5E284EB5DD2968C1650D6DB025F9FD@AcuExch.aculab.com> References: <20170106123711.GA15139@hmsreliant.think-freely.org> <063D6719AE5E284EB5DD2968C1650D6DB025A97E@AcuExch.aculab.com> <20170109122408.GA20973@hmswarspite.think-freely.org> <20170109191823.GC20973@hmswarspite.think-freely.org> <20170110143351.GA10195@hmswarspite.think-freely.org> <20170111125708.GA1518@hmswarspite.think-freely.org> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.202.99.200] Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 X-Outbound-IP: 213.249.233.130 X-Env-From: David.Laight@ACULAB.COM X-Proto: esmtps X-Revdns: X-HELO: AcuExch.aculab.com X-TLS: TLSv1:AES128-SHA:128 X-Authenticated_ID: X-PolicySMART: 3396946, 3397078 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id v0C9pLEu005586 From: Sun Paul [mailto:paulrbk@gmail.com] > Sent: 12 January 2017 09:31 > Let me clear the understanding. below is the flow. > > 1. Client sends to Linux Router: 192.168.206.83 -> 192.168.206.56, > 2. Linux router sends to SERVER where the source IP is unchanged: > 192.168.206.83 -> 192.168.206.66 > > My question here is why SERVER cannot response this INIT chunk? Probably because the IP addresses embedded in the SCTP packet don't match the ones in the IP header. David