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--></style><title>Re: [Live-devel] Groupsock doesn't bind to
Multicast Addre</title></head><body>
<blockquote type="cite" cite>I am relatively new user to the Live
Media library. In our application, we would like to bind to a
multicast address in addition to binding to the local port number.
This is so that we *only* receive packets destined for a given<u>
Multicast address & port</u> combination and prevent other
datagrams destined for that same port from being deliverd to our
socket.</blockquote>
<div><br></div>
<div>This is often an operating system issue. Some OSs work the
way you want; others do not.</div>
<div><br></div>
<blockquote type="cite" cite>// change imr.imr_interface.s_addr =
ReceivingInterfaceAddr; to following:</blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite>if
(IN_MULTICAST(ntohl(ReceivingInterfaceAddr))) {<br>
// Bound to MULTICAST Address, so use INADDR_ANY as
the i/f address<br>
imr.imr_interface.s_addr = INADDR_ANY;<br>
}<br>
else {<br>
// Bound to UNICAST Address, so use this
address as the i/f address<br>
imr.imr_interface.s_addr =
ReceivingInterfaceAddr;<br>
}</blockquote>
<div><br></div>
<div>This is bogus, because the default value of
"ReceivingInterfaceAddr" *is* INADDR_ANY. I.e., you'll
get the same effect as your proposed change if you don't set
"ReceivingInterfaceAddr" at all.</div>
<x-sigsep><pre>--
</pre></x-sigsep>
<div><br>
Ross Finlayson<br>
Live Networks, Inc.<br>
http://www.live555.com/</div>
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