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 lists.zx2c4.com (lists.zx2c4.com [165.227.139.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 833D2D49228 for ; Mon, 18 Nov 2024 14:44:04 +0000 (UTC) Received: by lists.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 5e0f5f07; Mon, 18 Nov 2024 12:45:19 +0000 (UTC) Received: from mail-a09.ithnet.com (mail-a09.ithnet.com [217.64.83.104]) by lists.zx2c4.com (ZX2C4 Mail Server) with ESMTPS id c2e9b9fa (TLSv1.2:ECDHE-ECDSA-AES256-GCM-SHA384:256:NO) for ; Fri, 21 Jun 2024 13:54:44 +0000 (UTC) Received: (qmail 20551 invoked by uid 0); 21 Jun 2024 13:54:44 -0000 Received: from skraw.ml@ithnet.com by mail-a09 (Processed in 3.441632 secs); 21 Jun 2024 13:54:44 -0000 X-Virus-Status: No X-ExecutableContent: No Received: from dialin014-sr.ithnet.com (HELO ithnet.com) (217.64.64.14) by mail-a09.ithnet.com with ESMTPS (ECDHE-RSA-AES256-GCM-SHA384 encrypted); 21 Jun 2024 13:54:40 -0000 X-Sender-Authentication: SMTP AUTH verified Date: Fri, 21 Jun 2024 15:54:39 +0200 From: Stephan von Krawczynski To: Daniel =?UTF-8?B?R3LDtmJlcg==?= Cc: Nico Schottelius , WireGuard mailing list Subject: Re: Wireguard uses incorrect interface - routing issue Message-ID: <20240621155439.6cb5abb9@ithnet.com> In-Reply-To: <20240621122926.2xzt7ulno5oczqcv@House.clients.dxld.at> References: <878qyyim5k.fsf@ungleich.ch> <874j9milmo.fsf@ungleich.ch> <20240621122926.2xzt7ulno5oczqcv@House.clients.dxld.at> Organization: ith Kommunikationstechnik GmbH X-Mailer: Claws Mail 4.2.0 (GTK 3.24.39; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Mon, 18 Nov 2024 12:44:56 +0000 X-BeenThere: wireguard@lists.zx2c4.com X-Mailman-Version: 2.1.30rc1 Precedence: list List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: wireguard-bounces@lists.zx2c4.com Sender: "WireGuard" On Fri, 21 Jun 2024 14:29:26 +0200 Daniel Gr=C3=B6ber wrote: > On Fri, Jun 21, 2024 at 01:24:47PM +0200, Nico Schottelius wrote: > >=20 > > p.s.: the route lookup looks correct on the machine, when selecting the > > source IP: > >=20 > > [11:15] server141.place10:~# ip r get 194.187.90.23 > > 194.187.90.23 via inet6 fe80::3eec:efff:fecb:d81a dev eth0 src > > 192.168.1.149 uid 0 cache=20 > > [11:16] server141.place10:~# ip r get 194.187.90.23 from 192.168.1.149 > > 194.187.90.23 from 192.168.1.149 via 192.168.1.254 dev eth1 table 42 ui= d 0=20 > > cache=20 > >=20 > > wireguard still uses the wrong interface: > >=20 > > 11:20:13.115154 eth0 Out IP 192.168.1.149.60031 > 194.187.90.23.4000: > > UDP, length 148 =20 >=20 > I haven't looked at the details yet but this smells like the same route > caching issue I found a while ago: > https://lists.zx2c4.com/pipermail/wireguard/2023-July/008111.html >=20 > Does up/down'ing the interface make the problem go away? IIRC that will > re-initialize the udp socket and thus clear the route chache. >=20 > FYI Nico: It may be time to escalate these bugs to the network subsystem > maintainers on netdev@vger.kernel.org since Jason is not reading this list > anymore AFAICT. >=20 > get_maintainer.pl spits out this list of emails to send To: >=20 > Jason A. Donenfeld" , > "David S. Miller" , > Eric Dumazet ,=20 > Jakub Kicinski , > Paolo Abeni , > wireguard@lists.zx2c4.com,=20 > netdev@vger.kernel.org, > linux-kernel@vger.kernel.org >=20 > Do add me to CC as well. Before sending I'd recommend working out an > ip-netns based reproducer script -- makes it harder to ignore the report = as > "ugh, too much work" ;) >=20 > Let me know if you need help with that, > --Daniel ... and in case you do find someone interested at all there is still the problem of no signaling to anyone when a client connects. I hardly can remember the decade when all this was implemented in cipe. --=20 Regards, Stephan