From owner-freebsd-net@freebsd.org Tue Jul 7 10:01:18 2020 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 76DA835C749 for ; Tue, 7 Jul 2020 10:01:18 +0000 (UTC) (envelope-from f.colliot@gmail.com) Received: from mail-ua1-x934.google.com (mail-ua1-x934.google.com [IPv6:2607:f8b0:4864:20::934]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4B1HyP55y9z4LTN for ; Tue, 7 Jul 2020 10:01:17 +0000 (UTC) (envelope-from f.colliot@gmail.com) Received: by mail-ua1-x934.google.com with SMTP id g4so335290uaq.10 for ; Tue, 07 Jul 2020 03:01:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=/ZTFPLiQK/pVT+024tcJL26UtblQV3WNU2VeD0gkooI=; b=cnlBpVZczAt4VkBec24J7s42syeTDNic2sNOdxbaD5Vxo3V/vri9370enbeHVvpyei 1rThFLFs6z6bqjdIfjiDYcysWrH2hM9dPp19rmhuyNYfRUwYshx5GsmeYj6S5Lpvqbkx WPaMPLKBXrE2swJelE9+jmEanebb17pdhkXutT/Z+6TOhQ4DHd2j8u8eoiJzHUzp+EHJ eT+5LCIsmh5e7qdtvhAUXbbeRda1MstKOSlaGed1d9JF7GRGuWmEuPGq+KHCm1s6htqJ jSeTOZ0bE/VbfHjvv9H+XlA4ZKcs1jkPTr9sltid3bsY+kibEwzS+4fFyd/1P9v3KDaq peAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=/ZTFPLiQK/pVT+024tcJL26UtblQV3WNU2VeD0gkooI=; b=UB0C32f3kqeYXLvN4dNtI8oTxYu6HJMSqOPuCuMtPDE+pdAqqW6Hf1aY9WwjzZrJW4 Yj1V+wPTY81pkNJgewVKbm3OyR7cw5TafgcGbdTpwZ/GdQJMfnOJLwNjhfGK5JOxiSIs JDWPtWmDx2HwJFu6mDMkCMblhB5Golrcae+2bknByINAb6ZkQFqGNj9Bh0l16fneGO22 Wu8NU1YQOwQ2L7LjxWem9pZnsKiOvfyJ5mXY+D007yW96DBiY3FJYW8bIGaf1CvCTGOK Z6E9+4Mx/MnKZcJWAZP7CGvuTt+aeCnhJ0pm93tt1P69UTigM8wRz2aSAwxRr5OTVHQK 0LWA== X-Gm-Message-State: AOAM533m6w/6NhAq1cCVfkfoeF2l1CoYVLtoIfNlz5a3yubQiYNFyEDy K3KmR3unOaj44J54oX7zUmfxRTUAi3dHw0CI3wi8As7KFsRxXQ== X-Google-Smtp-Source: ABdhPJwzPuRhdmzGWMJJRkBZ5T6kUqUKauTEd0P2UuurTBJqn+yFYqXfUUUdynVE8KvaVJsiOTKXRQ7SO87JH96q0co= X-Received: by 2002:a9f:28c3:: with SMTP id d61mr37389926uad.72.1594116076450; Tue, 07 Jul 2020 03:01:16 -0700 (PDT) MIME-Version: 1.0 From: Fabrice Colliot Date: Tue, 7 Jul 2020 12:01:05 +0200 Message-ID: Subject: Multicast: membership to (*, G) group after leaving a (S, G) group To: freebsd-net@freebsd.org X-Rspamd-Queue-Id: 4B1HyP55y9z4LTN X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=cnlBpVZc; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of fcolliot@gmail.com designates 2607:f8b0:4864:20::934 as permitted sender) smtp.mailfrom=fcolliot@gmail.com X-Spamd-Result: default: False [-2.74 / 15.00]; RCVD_TLS_ALL(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; NEURAL_HAM_MEDIUM(-0.98)[-0.975]; FROM_HAS_DN(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.00)[-0.999]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::934:from]; NEURAL_SPAM_SHORT(0.23)[0.230]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FREEMAIL_ENVFROM(0.00)[gmail.com]; RCVD_COUNT_TWO(0.00)[2]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; TAGGED_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.33 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 07 Jul 2020 10:01:18 -0000 Hi, I'm using smcroute to join and leave multicast groups and I don't understand the behavior of FreeBSD when the group is left. Here is what I do: smcroute join em1 10.3.4.5 224.0.55.55 ifmcstat -i em1 em1: inet 10.10.0.1 igmpv3 rv 2 qi 125 qri 10 uri 3 group 224.0.55.55 mode include mcast-macaddr 01:00:5e:00:37:37 group 224.0.0.1 mode exclude mcast-macaddr 01:00:5e:00:00:01 smcroute leave em1 10.3.4.5 224.0.55.55 ifmcstat -i em1 em1: inet 10.10.0.1 igmpv3 rv 2 qi 125 qri 10 uri 3 group 224.0.55.55 mode undefined mcast-macaddr 01:00:5e:00:37:37 group 224.0.0.1 mode exclude mcast-macaddr 01:00:5e:00:00:01 At this point, I expected to have no membership left on em1 for 224.0.55.55 but ifmcstat shows that the interface is still a member of the group but in undefined mode. I was wondering if anybody could tell me why the group membership seems to be transitioned to a (*, G) membership when all the (S, G) memberships are removed. Thanks! Fabrice