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 X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FA88C2D0E2 for ; Tue, 22 Sep 2020 20:26:40 +0000 (UTC) Received: from krantz.zx2c4.com (krantz.zx2c4.com [192.95.5.69]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1EBD6206C9 for ; Tue, 22 Sep 2020 20:26:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1EBD6206C9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=pallas.us Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=wireguard-bounces@lists.zx2c4.com Received: by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id a65e49f5; Tue, 22 Sep 2020 19:55:52 +0000 (UTC) Received: from telperion.info ( [2600:3c01::f03c:91ff:fe96:a052]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTPS id 55f7993a (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO) for ; Tue, 22 Sep 2020 19:55:50 +0000 (UTC) Received: from [192.168.127.224] (184-23-8-77.dsl.static.fusionbroadband.com [::ffff:184.23.8.77]) (AUTH: LOGIN pallas, ) by telperion.info with ESMTPSA id 0000000000046534.000000005F6A5E1D.0000719C; Tue, 22 Sep 2020 13:27:09 -0700 Subject: Re: Interest in adding multicast support to Wireguard? To: Reid Rankin Cc: "Jason A. Donenfeld" , WireGuard mailing list References: <9b4ba85a-633a-04ed-ca15-eb29d476cd57@pallas.us> From: Derrick Lyndon Pallas Message-ID: <0f0a03ee-9f3b-0722-831e-2cbf61825246@pallas.us> Date: Tue, 22 Sep 2020 13:26:01 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US 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 9/22/20 12:38 PM, Reid Rankin wrote: > While I'm all for multicast support, I don't think this is it. TunSafe > only has that option to allow you to turn off an extra anti-multicast > filter that's on by default and drops anything incoming from ff00::/8 > or 224.0.0./3, even if it's from a peer with those ranges in its > AllowedIPs. (Actually, 224.0.0.0/3 is technically the wrong range for > IPv4 multicast; that's 224.0.0.0/4. The upper half of that space, > 240.0.0.0/4, has been "reserved for future addressing modes" since > 1989.) Yes, I also agree that all-or-nothing is not the right answer. I'm only pointing out that multicast has been implemented in at least one client. ~Derrick