Re: Quick question about mcast routing

[Yuri Pryadkin <yuri@who.isi.edu>]

christos@ccrc.wustl.edu writes:

> Hi everyone,
> 
> is there a quick way to discover the links belonging to
> a multicast tree created by DM?
> 
> Christos.

If this link is i->j, you'll need to check if the head of the link is
an active target in any of i's replicators.  Something like this
(untested) :

DM instproc mcast-link {i j} {
	$self instvar ns_
	set head [[$ns_ link $i $j] head]
	foreach rep [$i getReps "*" "*"] {
		if { [$rep is-active-target $head] } {
			return 1;
		}
	}
	return 0
}

Since mcast uses bi-directional links, you'll have to check both
directions.

  -Yuri