[Fwd: Receiving MLDv1 reports in a daemon]

[Fwd: Receiving MLDv1 reports in a daemon]

[Nivedita Singhvi]

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Ah, sorry, my bad. I cc'd netdev in my first response
but cut down the actual post.

thanks,
Nivedita


-------- Original Message --------
Subject: Receiving MLDv1 reports in a daemon
Date: Tue, 16 Mar 2004 16:38:25 +0530 (IST)
From: Madhavi <madhavis@sasken.com>
To: <linux-kernel@vger.kernel.org>


Hi

I am trying to incorporate the functionality of MLDv1 into a daemon. This
would be in addition to the functionality already supported by the kernel
IPv6 stack.

I am opening a raw socket with proto IPPROTO_ICMPV6 in my daemon process.
When I am sending an MLDv1 report from the host, the Router is able to
receive the report. But, I am not able to receive it over the socket.

I have checked the kernel code and found that the kernel is sending reports
only if the group address being reported is added to the device multicast
list. Since I won't know the group address in advance, I can't add it to
the device multicast list.

Is there any other way to get the MLDv1 reports to my daemon. Any solution
to this problem would be very helpful to me.

Thanks & regards
Madhavi.

Madhavi Suram
Senior Software Engineer
Customer Delivery / Networks
Sasken Communication Technologies Limited
139/25, Ring Road, Domlur
Bangalore - 560071 India
Email: madhavis@sasken.com
Tel: + 91 80 5355501 Extn: 8062
Fax: + 91 80 5351133
URL: www.sasken.com



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Re: [Fwd: Receiving MLDv1 reports in a daemon]

[David Stevens]

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> Is there any other way to get the MLDv1 reports to my daemon. Any
solution
> to this problem would be very helpful to me.

To receive all MLDv1 reports, you need the interface to be in
multicast promiscuous mode. You can do this by setting the
interface flag "IFF_ALLMULTI".

For MLDv2, reports are sent to the all-multicast-routers group
address, so you only need to join that group in MLDv2.

                                    +-DLS

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