From owner-freebsd-bugs@freebsd.org Mon Sep 11 20:56:38 2017 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7C8DEE23DF8 for ; Mon, 11 Sep 2017 20:56:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 6B0F4727A0 for ; Mon, 11 Sep 2017 20:56:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v8BKucDP004689 for ; Mon, 11 Sep 2017 20:56:38 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 222240] multiple ICMP echo requests reported when ping broadcast Date: Mon, 11 Sep 2017 20:56:38 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: hannes@mehnert.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Sep 2017 20:56:38 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222240 Bug ID: 222240 Summary: multiple ICMP echo requests reported when ping broadcast Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: hannes@mehnert.org When I send a broadcast ping, and run tcpdump on the same host, I see multi= ple ICMP echo requests in tcpdump (with slightly different timestamps). Runnin= g a tcpdump on a different host in the same broadcast domain only sees one ICMP echo request!. # ping 192.168.0.255 PING 192.168.0.255 (192.168.0.255): 56 data bytes ... # tcpdump -lni wlan0 icmp 21:45:41.833915 IP 192.168.0.6 > 192.168.0.255: ICMP echo request, id 22192, seq 0, length 64 21:45:41.833927 IP 192.168.0.6 > 192.168.0.255: ICMP echo request, id 22192, seq 0, length 64 21:45:42.896747 IP 192.168.0.6 > 192.168.0.255: ICMP echo request, id 22192, seq 1, length 64 21:45:42.896758 IP 192.168.0.6 > 192.168.0.255: ICMP echo request, id 22192, seq 1, length 64 I reported this earlier on transport@ (https://lists.freebsd.org/pipermail/freebsd-transport/2016-September/00014= 5.html) and it was cross-posted to net@ (https://lists.freebsd.org/pipermail/freebsd-net/2016-September/046105.html) gnn@ reported he can reproduce this on 11 as well. I just checked, and it this behaviour is still present in CURRENT (r322062) --=20 You are receiving this mail because: You are the assignee for the bug.=