Date: Fri, 28 Jun 2013 12:15:14 +0200 From: Bernd Walter <ticso@cicely7.cicely.de> To: linimon@freebsd.org Cc: freebsd-net@freebsd.org, freebsd-bugs@freebsd.org Subject: Re: kern/179901: [netinet] [patch] Multicast SO_REUSEADDR handled incorrectly Message-ID: <20130628101514.GX45651@cicely7.cicely.de> In-Reply-To: <201306240359.r5O3xO0g012449@freefall.freebsd.org> References: <201306240359.r5O3xO0g012449@freefall.freebsd.org>
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On Mon, Jun 24, 2013 at 03:59:24AM +0000, linimon@freebsd.org wrote: > Old Synopsis: [patch] Multicast SO_REUSEADDR handled incorrectly > New Synopsis: [netinet] [patch] Multicast SO_REUSEADDR handled incorrectly > > Responsible-Changed-From-To: freebsd-bugs->freebsd-net > Responsible-Changed-By: linimon > Responsible-Changed-When: Mon Jun 24 03:59:05 UTC 2013 > Responsible-Changed-Why: > Over to maintainer(s). > > http://www.freebsd.org/cgi/query-pr.cgi?pr=179901 > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" I don't know if this is related or a different bug, but the same mentioned commits are suspicious for us. We had been running with our own IPv6 software into the same REUSEADDR problem and changed to REUSEPORT as this is how it is done in mcastread from mcast-tools port. Don't know where we originally got the REUSEADDR from, probably a Stevens book. So far binding works with this change in our software. However we only receive packets from network and not packets from the host itself. We use multicast to notify multiple processes on multiple machines, including the machine itself. To reproduce: - use two hosts - start mcastread on each of them on an interface with shared LAN - send via mcastsend on one host - packets are received on the other host, but not with the mcastread on the same host -- B.Walter <bernd@bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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