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Michael Ulitskiy

2015-Oct-06 20:25 UTC

[asterisk-users] PJSIP: how to retrieve underlying SIP Call-ID

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 at xyz:1] NoOp("PJSIP/poly_650_2_01-0000006f",
"Call-ID: e3e249e5-7e8941dd-da386565 at 192.168.100.238") in new stack
    -- Executing [999 at 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 at _pre_dial:1] NoOp("PJSIP/xyz011101-00000070",
"Call-ID: ") in new stack
    -- Executing [s at _pre_dial:2] Set("PJSIP/xyz011101-00000070",
"CHANNEL(hangup_handler_push)=_hangup,s,1()") in new stack
    -- Executing [s at _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 at _hangup:1] NoOp("PJSIP/xyz011101-00000070",
"Call-ID: ") in new stack
    -- Executing [s at _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 at 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
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Matthew Jordan

2015-Oct-06 22:06 UTC

head link

[asterisk-users] PJSIP: how to retrieve underlying SIP Call-ID

On Tue, Oct 6, 2015 at 3:25 PM, Michael Ulitskiy <mulitskiy at acedsl.com>
wrote:> 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 at xyz:1] NoOp("PJSIP/poly_650_2_01-0000006f",
"Call-ID:
> e3e249e5-7e8941dd-da386565 at 192.168.100.238") in new stack
>
> -- Executing [999 at 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 at _pre_dial:1] NoOp("PJSIP/xyz011101-00000070",
"Call-ID: ")
> in new stack
>
> -- Executing [s at _pre_dial:2] Set("PJSIP/xyz011101-00000070",
> "CHANNEL(hangup_handler_push)=_hangup,s,1()") in new stack
>
> -- Executing [s at _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 at _hangup:1] NoOp("PJSIP/xyz011101-00000070",
"Call-ID: ") in
> new stack
>
> -- Executing [s at _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 at 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?
>
Hi Michael -

While you can use PJSIP_HEADER, the ability to retrieve the SIP
Call-ID through the CHANNEL function on a PJSIP channel was actually
just added in 13.6.0, and should be in the latest RC (13.6.0-rc2 [2]).

In either case, you're using a function as opposed to some
application, which means you do need to call the functions on the
specific channel. To get access to the outbound channel, you can use a
pre-dial handler's 'b' option [3]. The Call-ID *should* be set up on
the underlying invite session in the PJSIP dialog, even though it
hasn't been transmitted yet.

Matt

[1] https://gerrit.asterisk.org/#/c/1204/
[2] http://downloads.asterisk.org/pub/telephony/asterisk/ChangeLog-13.6.0-rc2
[3] https://wiki.asterisk.org/wiki/display/AST/Pre-Dial+Handlers

-- 
Matthew Jordan
Digium, Inc. | Director of Technology
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: http://digium.com & http://asterisk.org

Michael Ulitskiy

2015-Oct-07 16:28 UTC

head link

[asterisk-users] PJSIP: how to retrieve underlying SIP Call-ID

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:> On Tue, Oct 6, 2015 at 3:25 PM, Michael Ulitskiy <mulitskiy at
acedsl.com> wrote:
> > 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 at xyz:1]
NoOp("PJSIP/poly_650_2_01-0000006f", "Call-ID:
> > e3e249e5-7e8941dd-da386565 at 192.168.100.238") in new stack
> >
> > -- Executing [999 at 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 at _pre_dial:1]
NoOp("PJSIP/xyz011101-00000070", "Call-ID: ")
> > in new stack
> >
> > -- Executing [s at _pre_dial:2]
Set("PJSIP/xyz011101-00000070",
> > "CHANNEL(hangup_handler_push)=_hangup,s,1()") in new stack
> >
> > -- Executing [s at _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 at _hangup:1]
NoOp("PJSIP/xyz011101-00000070", "Call-ID: ") in
> > new stack
> >
> > -- Executing [s at _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 at 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?
> >
> 
> Hi Michael -
> 
> While you can use PJSIP_HEADER, the ability to retrieve the SIP
> Call-ID through the CHANNEL function on a PJSIP channel was actually
> just added in 13.6.0, and should be in the latest RC (13.6.0-rc2 [2]).
> 
> In either case, you're using a function as opposed to some
> application, which means you do need to call the functions on the
> specific channel. To get access to the outbound channel, you can use a
> pre-dial handler's 'b' option [3]. The Call-ID *should* be set
up on
> the underlying invite session in the PJSIP dialog, even though it
> hasn't been transmitted yet.
> 
> Matt
> 
> [1] https://gerrit.asterisk.org/#/c/1204/
> [2]
http://downloads.asterisk.org/pub/telephony/asterisk/ChangeLog-13.6.0-rc2
> [3] https://wiki.asterisk.org/wiki/display/AST/Pre-Dial+Handlers
> 
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asterisk users - Oct 2015 - PJSIP: how to retrieve underlying SIP Call-ID

[asterisk-users] PJSIP: how to retrieve underlying SIP Call-ID

[asterisk-users] PJSIP: how to retrieve underlying SIP Call-ID

[asterisk-users] PJSIP: how to retrieve underlying SIP Call-ID