[asterisk-users] Asterisk 11, hangup-handlers, Local channels and channel originate

[Richard Mudgett]

> On 03/25/2013 05:17 PM, Olivier wrote:
> > Hello,
> > 
> > I'm giving hangup-handlers a try on a new Asterisk 11.2.1 setup.
> > My plan is to use this handler to update my CDRs with values such
> > as
> > Asterish and Tech cause (see function HANGUP_CAUSE).
> > I want to have my custom hangup-handler be run only once and when
> > "the
> > second channel" hangs up.
> > 
> > At the moment, I'm issuing a couple of "channel originate
> > Local/1 at mycontext1 extension 123456789 at mycontext2" commands.
> > 
> > I'm observing that as I'm using expressions such as
> > Local/1 at mycontext1,
> > a Local <ZOMBIE> channel is hanged before the second channel stops
> > ringing.
> > When the second channel itself ends, my handler is not run anymore.
> > 
> > 
> > What would you suggest me to do ?
> > Should I delay my Set(CHANNEL(hangup_handler_wipe)= ...) statement
> > till
> > both channels are bridged together ?
> > 
> 
> It is hard to say without seeing the dialplan that you're using. Most
> likely, the hangup handler has been attached to one half of the Local
> channel as opposed to the channel you want it attached to. Can you
> include the full dialplan that you're using?
> 
> 
> Yes, of course.
> I'll simplify it and post it here ASAP.
> 
> 
> Here it is:
> 
> [hangup-handler]
> exten => s,1,Verbose(0,Entering context ${CONTEXT} in channel
> ${CHANNEL} with EXTEN and CID set to ${EXTEN} and ${CALLERID(num)})
> 
> 
> [to-foobar]
> exten => _X.,1,Verbose(0,Entering context ${CONTEXT} with EXTEN and
> CID set to ${EXTEN} and ${CALLERID(num)})
> same => n, Set(CHANNEL(hangup_handler_push)=hangup-handler,s,1)
> same => n, Dial(SIP/foobar/${EXTEN})
> same => n, Hangup()
> 
> 
> [from-foobar]
> exten => _X.,1,Verbose(0,Entering context ${CONTEXT} with EXTEN and
> CID set to ${EXTEN} and ${CALLERID(num)})
> same => n, Dial(SIP/foobar/${EXTEN})
> same => n, Hangup()
> 
> 
> The command I used is :
> channel originate Local/7005 at from-foobar extension 7003 at to-foobar
> 
> Console prints:
> Entering context from-foobar with EXTEN and CID set to 7005 and
> Entering context to-foobar with EXTEN and CID set to 7003 and
> Entering context hangup-handler in channel
> Local/7005 at from-foobar-00000008;1<ZOMBIE> with EXTEN and CID set to
> s and
> 
> The first line is printed at soon as Enter key is pressed.
> The second and third lines are printed when originating channel
> answers (here extension SIP/foobar/7005)

The originate creates a chain of channels like so:
SIP/foobar/7005 -- Local/7005 at from-foobar;1 -- Local/7005 at from-foobar;2 -- SIP/foobar/7003

You put the hangup handler on the Local/7005 at from-foobar;2 channel.  When
the local channel optimizes itself out, the hangup handler is run on the
hanging up local channel.

What you need to do is use a pre-dial handler to put the hangup handler on
the SIP/foobar/7003 channel.

Richard

[1] https://wiki.asterisk.org/wiki/display/AST/Hangup+Handlers
[2] https://wiki.asterisk.org/wiki/display/AST/Pre-Dial+Handlers