From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1BFCC46467 for ; Wed, 4 Jan 2023 15:02:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229441AbjADPCd (ORCPT ); Wed, 4 Jan 2023 10:02:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49716 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239451AbjADPC3 (ORCPT ); Wed, 4 Jan 2023 10:02:29 -0500 Received: from mail.netfilter.org (mail.netfilter.org [217.70.188.207]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 25F03E0EC for ; Wed, 4 Jan 2023 07:02:28 -0800 (PST) Date: Wed, 4 Jan 2023 16:02:24 +0100 From: Pablo Neira Ayuso To: Sriram Yagnaraman Cc: netfilter-devel@vger.kernel.org, Florian Westphal , Marcelo Ricardo Leitner , Long Xin Subject: Re: [RFC PATCH] netfilter: conntrack: simplify sctp state machine Message-ID: References: <20230104113143.21769-1-sriram.yagnaraman@est.tech> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20230104113143.21769-1-sriram.yagnaraman@est.tech> Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org On Wed, Jan 04, 2023 at 12:31:43PM +0100, Sriram Yagnaraman wrote: > All the paths in an SCTP connection are kept alive either by actual > DATA/SACK running through the connection or by HEARTBEAT. This patch > proposes a simple state machine with only two states OPEN_WAIT and > ESTABLISHED (similar to UDP). The reason for this change is a full > stateful approach to SCTP is difficult when the association is > multihomed since the endpoints could use different paths in the network > during the lifetime of an association. Do you mean the router/firewall might not see all packets for association is multihomed? Could you please provide an example?