Unix Programming - Re: receive broadcasts on INADDR

Author

Re: receive broadcasts on INADDR_ANY on the same machine does not

saju

2006-08-22, 9:59 pm

linux62i@yahoo.com wrote:
> Hello,
>
> I have got a problem with receiving broadcasted (to 255.255.255.255)
> packets.
> I receive such packets on INADDR_ANY on the same host and on remote one
>
> via normal UDP sockets (all things like setting flags for broadcast are
>
> ok).
> If I use UDP datagramm sockets for _sending_ everything is caught on
> both
> machines. If I use PF_PACKET and assemble packet myself one-to-one
> matching the datagramm and send it I only receive the broadcast on
> remote host.
> I can see packets with tcpdump - they are identical. Everything happens
>
> on eth0.
>
>
> Linux 2.6.9.
>
>
> What could be the problem and how can I workaround it? I would like
> to leave receiver using simpel UDP sockets not going into PF_PACKET...

Try setting the IP_MULTICAST_LOOP option to 0 with setsockopt() for the
udp socket.

regards
srp

--
I will never get off this planet
- Luke Skywalker

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