Date: Wed, 15 Dec 2010 02:42:58 +0300 From: serg vasilyev <sergv326@gmail.com> To: Andriy Syrovenko <andriys@gmail.com> Cc: flo@smeets.im, freebsd-net@freebsd.org, Bruce Simpson <bms@incunabulum.net> Subject: Re: kern/138666: [multicast] [panic] not working multicast through igmpproxy Message-ID: <AANLkTikPpfGZNmEYXW_F1_TxFUDZWF0ps7zeq4SWKvTR@mail.gmail.com> In-Reply-To: <3e2b8dd90912090037v6c8e13e1v869471d4e03ecfd5@mail.gmail.com> References: <200912071020.nB7AK77I023054@freefall.freebsd.org> <4B1CDEE5.6080507@incunabulum.net> <3e2b8dd90912070305t6ffc08a6gf7acd8890d028854@mail.gmail.com> <4B1D07C3.6090005@incunabulum.net> <3e2b8dd90912080114x31d962acqf2c8a360e7b5a83d@mail.gmail.com> <4B1E1EF0.8040503@incunabulum.net> <3e2b8dd90912080155s544a7a50j17882b35f1343750@mail.gmail.com> <4B1E2574.8010704@incunabulum.net> <3e2b8dd90912080247s247bd878ud9fe4b234ff83f84@mail.gmail.com> <3e2b8dd90912090037v6c8e13e1v869471d4e03ecfd5@mail.gmail.com>
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2009/12/9, Andriy Syrovenko <andriys@gmail.com>: > Hi, > > Well, turning off the transmit checksum offloading on the upstream > interface solves the problem with IP checksums of IGMP report and > leave messages always being 0. So after issuing the > > ifconfig re1 -txcsum > > command, the proxy successfully subscribes to receiving multicast > streams, and I can see multicast UDP traffic coming in on the upstream > interface. However there is another serious problem. Shortly alfter my > router starts forwarding multicast traffic kernel crashes. The crash > may happen either immediately when I press the play button in my IPTV > player, or just after several channel switches. You can find crash > reports in the attached files. They are almost identical, differing > only in whether the pf module is loaded. > > > The interesting part of the story is if I block incoming UDP multicast > traffic using something like > > block in quick inet proto udp from any to 224.0.0.0/4 > > in my pf.conf, system remains stable. But as soon as I comment the > rule and reload pf, kernel crashes. I suspect the problem is not > strictly related to the igmp processing, but to the multicast routing > in general. Probably something wrong with thread synchronization. My > system is a dual-core Intel Atom. > > Another interesting observation is when my BSD box is disconnected > from the upstream router, I can see only IGMPv3 messages going out the > upstream interface, even despite the fact that igmpproxy supports > IGMPv2 only. > > br, > Andrey > Does your system do any nat processing ?
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