[Asterisk-Users] Need knowledgeable comments, bug 981 and dual redirect

[Matt Lawson]

It seems I'm not the only one that's had a difficult time with the "dual 
party redirect".  i.e. You have a connected call and you want to 
redirect both ends of the call into a meetme room (presumably because 
you're going to add more people).

AFAIK, the only way to do it is using the "ExtraChannel" feature with 
Action: Redirect (it needs to be done from the management interface in 
my case, assume the user cannot use his phone's conference feature).

Up until a cvs update about 2 days ago, I would have intermittent 
crashes with this ("ExtraChannel in transfer causes crash").  The most 
recent cvs hasn't shown me a crash so far but exhibits the bugs in #981

Can someone knowledgeable about masquerading shed some light on this 
(I've tried to follow the code but it's pretty confusing, what with all 
the zombies and AsyncGoto's and p->pvt->pvt's, whose meaning eludes me):

1.  Is there a better way to accomplish the dual-redirect using only the 
management interface?

2.  Is Masquerading used for anything other than this feature?

3.  Is the masquerading code going to remain in Asterisk (comments 
suggest that it's some sort of temporary hack)

4.  Is there a flowchart or description anywhere of what states the 
channels are supposed to transition through during masquerading and dual 
redirect?

I'm willing to try to diagnose it but it's just really confusing.  I was 
hoping that someone who really knew how this works could give some words 
of wisdom before I am pulled into what will probably be a very 
time-consuming task.

Thanks,

Matt