netdev - Re: [IPv6] "sendmsg: invalid argument" to multicast group after some time

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Date:	Mon, 8 Sep 2008 17:34:00 -0700
From:	David Stevens <dlstevens@...ibm.com>
To:	Bernhard Schmidt <berni@...kenwald.de>
Cc:	Brian Haley <brian.haley@...com>, netdev@...r.kernel.org
Subject: Re: [IPv6] "sendmsg: invalid argument" to multicast group after	some time

Bernhard,
        I looked at this some more and didn't see anything obvious.
The send side doesn't need group membership to send, or anything
special, really. The only thing that comes to mind is that maybe you
have a bogus route installed (since you don't have a bogus interface
flag :-)).
        Can you do an "ip -6 route list" when it's happening?

        Also might be worthwhile to see the entire arg list, so
maybe using the "-s" option to strace to increase it, and we
probably only need sendmsg(), so maybe:

strace -s 1024 -e trace=sendmsg -e verbose=sendmsg ping6 -I eth0 ....

I wanted to see more detail than strace could fit in the default length. 
:-)

                                        +-DLS

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