Multicast receive problem.

Hello,

I'm tryig to write a program to receive multicast packets. I running
2.6.22.1

I have create my socket, bound to the address and joined the multicast
group I wish to receive on (230.0.0.0).

This works fine when the packets being send have a source address of
192.168.0.1 and a destination of 230.0.0.0.

However when the packet is sent out with source & destination address of
230.0.0.0 then the packet is getting dropped by the kernel. What do I
have to configure so that I can receive multicast packets that have been
sent with a multicast source address?

Thanks,

Will.