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List:       netbsd-tech-net
Subject:    Re: receiving and sending packets to 255.255.255.255
From:       Dennis Ferguson <dennis.c.ferguson () gmail ! com>
Date:       2011-12-18 5:53:45
Message-ID: 2F265548-363B-42B5-AAF1-24AA91B2991A () gmail ! com
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On 13 Dec, 2011, at 12:10 , Edgar Fuß wrote:

> Two questions regarding the all-ones aka limited-broadcast aka INADDR_BROADCAST \
> address: 
> 1. Is ist true/documented that I only receive broadcasts directed to that address \
> if I listen on INADDR_ANY aka 0.0.0.0? 
> 2. When I want to send to that address, how do I specify the interface to send on \
> (or network to send to)? I thought that was determined by address the sending \
> socket was bound to, but that seems not to be true.

For 2. try the IP_MULTICAST_IF socket option.  I think sending to 255.255.255.255
works the same as sending to 224.0.0.1 (or, at least, it should work the same
way because it is the same problem).

Dennis Ferguson=


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