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[mulitskiy at acedsl.com]

Hello,

I've started to play with PJSIP and got stuck at the following problem.
I need to retrieve SIP Call-ID associated with PJSIP channel.
For inbound channel I can use ${PJSIP_HEADER(read,Call-ID)}, but that doesn't work for
outbound channel even in pre-dial or hangup handler. Whatever I do PJSIP_HEADER
seem to be unable to read headers for outbound channel.

Here's what I do:

[xyz]
exten => 999,1,NoOp(Call-ID: ${PJSIP_HEADER(read,Call-ID)})
same => n,Dial(PJSIP/xyz011101/sip:xyz011101@<outbound_proxy>:5060,30,b(_pre_dial,s,1))
exten => h,1,NoOp()

[_pre_dial]
exten => s,1,NoOp(Call-ID: ${PJSIP_HEADER(read,Call-ID)})
same => n,Set(CHANNEL(hangup_handler_push)=_hangup,s,1())
same => n,Return

[_hangup]
exten => s,1,NoOp(Call-ID: ${PJSIP_HEADER(read,Call-ID)})
same => n,Return


Here's the result:
-- Executing [999@xyz:1] NoOp("PJSIP/poly_650_2_01-0000006f", "Call-ID: e3e249e5-7e8941dd-da386565@192.168.100.238") in new stack
-- Executing [999@xyz:2] Dial("PJSIP/poly_650_2_01-0000006f", "PJSIP/xyz011101/sip:xyz011101@<outbound_proxy>:5060,30,b(_pre_dial,s,1)") in new stack
-- PJSIP/xyz011101-00000070 Internal Gosub(_pre_dial,s,1) start
-- Executing [s@_pre_dial:1] NoOp("PJSIP/xyz011101-00000070", "Call-ID: ") in new stack
-- Executing [s@_pre_dial:2] Set("PJSIP/xyz011101-00000070", "CHANNEL(hangup_handler_push)=_hangup,s,1()") in new stack
-- Executing [s@_pre_dial:3] Return("PJSIP/xyz011101-00000070", "") in new stack
== Spawn extension (xyz, 999, 1) exited non-zero on 'PJSIP/xyz011101-00000070'
-- PJSIP/xyz011101-00000070 Internal Gosub(_pre_dial,s,1) complete GOSUB_RETVAL=
-- Called PJSIP/xyz011101/sip:xyz011101@<outbound_proxy>:5060
== Using SIP RTP Audio TOS bits 184
-- PJSIP/xyz011101-00000070 is ringing
-- PJSIP/xyz011101-00000070 Internal Gosub(_hangup,s,1) start
-- Executing [s@_hangup:1] NoOp("PJSIP/xyz011101-00000070", "Call-ID: ") in new stack
-- Executing [s@_hangup:2] Return("PJSIP/xyz011101-00000070", "") in new stack
== Spawn extension (xyz, 999, 1) exited non-zero on 'PJSIP/xyz011101-00000070'
-- PJSIP/xyz011101-00000070 Internal Gosub(_hangup,s,1) complete GOSUB_RETVAL=
== Spawn extension (xyz, 999, 2) exited non-zero on 'PJSIP/poly_650_2_01-0000006f'
-- Executing [h@xyz:1] NoOp("PJSIP/poly_650_2_01-0000006f", "") in new stack

As you can see I can get Call-ID of inbound channel, but I receive null for the outbound channel in both pre-dial and hangup handlers.

So my question is if there's a way to retrieve SIP Call-ID for outbound channels?
Also the 2nd question is if PJSIP_HEADER is supposed to be able to read headers of the outbound channel?

Thanks,
Michael

[mjordan at digium.com]

On Tue, Oct 6, 2015 at 3:25 PM, Michael Ulitskiy <mulitskiy@acedsl.com> wrote:

[mulitskiy at acedsl.com]

Hello Matt,

That works (CHANNEL(pjsip,call-id)). Thanks.

I'm still interested to know if PJSIP_HEADER is supposed to be able to read headers of the outbound channel.

I'm also very interested to know if there's any way in asterisk to access headers received in "200 OK" reply,
as my proxy returns some important information there.

Thanks a lot,

Michael

On Tuesday, October 06, 2015 05:06:34 PM Matthew Jordan wrote: