(usagi-users 02872) Re: IPv6 multicast in 2.4.25 broken?

[Takashi Hibi <hibi665@xxxxxxx>]

Isn't it related to the patch (usagi-users 02627)?
http://www2.linux-ipv6.org/ml/usagi-users/msg02626.html

If the socket is bound to non-multicast address, it can't receive multicast packets.

Regards,
Takashi Hibi


> On Tue, Mar 30, 2004 at 01:47:06PM -0800, thus spake David Stevens:
>>    Can you reproduce this in a small test program and send me
>>    the source? Also, the contents of /dev/proc/igmp6 and any
>>    arguments you ran the program with would be helpful.
> 
> Not at this time, as I would have to reinstall a 2.4.25 kernel.  But I
> plan to do the testing soon.
> 
>>    At first I thought it might be that you have an MLD-snooping
>>    switch that doesn't understand MLDv2 packets, but ff02::1 is
>>    the all-nodes address which all hosts join, and which is not
>>    advertised at all. That should work if you're receiving any
>>    multicasts at all.
> 
> Well, I see those packets with tcpdump on both the sending and receiving
> interfaces, so no ethernet equipment is involved.  Moreover, the same
> code works perfectly on 2.4.24, which should indicate that there are
> some changes between the two (more precisely between 2.4.24 and
> 2.4.25-pre4) that break something.  Somehow the multicast packets are
> received but not relayed to the socket...
> 
> -- 
>  "The whole problem with the world is that fools and fanatics are
>    always so certain of themselves, and wiser people so full of doubts."
>                                                  - Bertrand Russell
> 
> 
> 
> 


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                        日比 孝 (Takashi Hibi)
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