From owner-freebsd-bugs@freebsd.org Wed May 31 08:34:12 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 5E015AFA378 for ; Wed, 31 May 2017 08:34:12 +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 4CAA16E4F5 for ; Wed, 31 May 2017 08:34:12 +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 v4V8YCdh077222 for ; Wed, 31 May 2017 08:34:12 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 219674] rpcbind -h breaks broadcast functionality Date: Wed, 31 May 2017 08:34:12 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: avg@FreeBSD.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: Wed, 31 May 2017 08:34:12 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219674 Bug ID: 219674 Summary: rpcbind -h breaks broadcast functionality Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: freebsd-bugs@FreeBSD.org Reporter: avg@FreeBSD.org If rpcbind is started with -h option, then it does not receive any broadcast traffic. This is because the FreeBSD UDP stack passes an incoming broadcast packet to a socket only if the socket is bound to either the INADDR_ANY or to the same broadcast IP address as in the packet's destinati= on. Thus, any RPC services depending on the broadcast functionality stop workin= g. For example, ypbind is no longer able to discover ypserv(-s). This behaviour is not documented at all neither in man pages nor in the handbook (https://www.freebsd.org/doc/handbook/network-nis.html). At minim= um, the issue deserves a big warning, at maximum there should be an example of = the configuration tweaks required to work around the problem (e.g. using ypset, etc). Ideally, though, rpcbind should bind to each broadcast address matching any= IP address passed via -h. Alternatively, we could add a socket option to allow a UDP socket to see the matching [the interface] broadcast traffic in addition to the traffic desti= ned to the bound IP address. --=20 You are receiving this mail because: You are the assignee for the bug.=