Date: Tue, 17 Jul 2001 15:05:12 -0500 (CDT) From: Tim Zingelman <zingelman@fnal.gov> To: <freebsd-stable@freebsd.org> Subject: IPFilter with Multicast - BugReport Message-ID: <Pine.GSO.4.30.0107171458010.14544-200000@nova.fnal.gov>
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Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
Content-ID: <Pine.GSO.4.30.0107171458012.14544@nova.fnal.gov>
Can someone confirm this bug... or am I missing something obvious?
The attached program works under FreeBSD without IPFilter loaded, and
works on Solaris8/sparc64 with or without IPFilter loaded.
IP Filter bug report form.
--------------------------
IP Filter Version: v3.4.16
Operating System Version: FreeBSD4.3-RELEASE & FreeBSD4.3-STABLE (7/16/01)
Configuration: LKM
Description of problem:
With ipfilter loaded, multicast packets sent out are not visible to the
sender of the multicast (with IP_MULTICAST_LOOP set on socket).
Multicast packets sent by this node are seen on other nodes.
Multicast packets sent by other nodes are seen on this node.
If ipfilter LKM is not loaded this works fine.
How to repeat:
Attached java program, (tested under linux jdk 1.3 from ports).
$java -classpath . MulticastSniffer 239.128.1.1 50092 true
^mcast addr ^port ^send mcasts
(false=listen only)
With ipfilter loaded you only see 'Multicast send' messages, but with
ipfilter not loaded, you also see 'Multicast receive' messages.
Thanks,
- Tim <Zingelman@fnal.gov>
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