asterisk users - Aug 2018 - How do I retrieve the Call-ID from the SIP INVITE when using Originate on PJSIP?

Using chan_sip, we are able to retrieve the Call-ID using the SIPCALLID channel
variable.  This works for both inbound and outbound (Originated) calls.

For PJSIP this variable doesn't get set.  Instead, for inbound calls we
retrieve the Call-ID from the INVITE packet using the
PJSIP_HEADER(read,Call-ID,1).
However, this doesn't work for outbound calls because the datastore
hasn't been set.

[08/23 07:14:41.185] DEBUG[59544] res_pjsip_header_funcs.c: There was no
datastore from which to read headers.
[08/23 07:14:41.185] DEBUG[59556][C-00000007] pbx_variables.c: Function
PJSIP_HEADER(read,Call-ID,1) result is '(null)'

Not being able to access the datastore for Originated PJSIP calls even though
there is already an event: newchannel seem like something was missed with the
PJSIP outbound calls.

Any suggestions?

Have a great day!

Dan
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Please Disregard.  I found the solution.

In case anyone else runs into this, use (CHANNEL(pjsip,call-id)) and not the
PJSIP_HEADER(read, ...)


From: asterisk-users <asterisk-users-bounces at lists.digium.com> On
Behalf Of Dan Cropp
Sent: Thursday, August 23, 2018 9:32 AM
To: asterisk-users at lists.digium.com
Subject: [asterisk-users] How do I retrieve the Call-ID from the SIP INVITE when
using Originate on PJSIP?

Using chan_sip, we are able to retrieve the Call-ID using the SIPCALLID channel
variable.  This works for both inbound and outbound (Originated) calls.

For PJSIP this variable doesn't get set.  Instead, for inbound calls we
retrieve the Call-ID from the INVITE packet using the
PJSIP_HEADER(read,Call-ID,1).
However, this doesn't work for outbound calls because the datastore
hasn't been set.

[08/23 07:14:41.185] DEBUG[59544] res_pjsip_header_funcs.c: There was no
datastore from which to read headers.
[08/23 07:14:41.185] DEBUG[59556][C-00000007] pbx_variables.c: Function
PJSIP_HEADER(read,Call-ID,1) result is '(null)'

Not being able to access the datastore for Originated PJSIP calls even though
there is already an event: newchannel seem like something was missed with the
PJSIP outbound calls.

Any suggestions?

Have a great day!

Dan
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