Re: Get channel variables via ARI/AMI

I think that’s getting me close.  I’m trying to get (or recreate) the FROM and TO lines of the header, from a system running PJSIP.  I think if I use CHANNEL to get local_uri and local_tag I can recreate a FROM line like:

FROM=<URI>;tag=TAG

 

And if I use CHANNEL to get remote_uri and remote_tag I can recreate a FROM line like:

TO=<URI>;tag=TAG

 

Would it be correct to assume that with this info (and ip:port info) I should be able to send a UDP SIP message from the PBX to the UA which appears to be part of the current call dialog?  I realize this is an odd thing to do, but I’m just interested in technical feasibility at this point.  Before I try to code this I want to ensure I’m not missing something stupid.

 

Thanks

Brian

 

 

From: asterisk-users [mailto:[email protected]] On Behalf Of Joshua C. Colp
Sent: Monday, June 26, 2023 3:08 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion <[email protected]>
Subject: Re: [asterisk-users] Get channel variables via ARI/AMI

 

On Mon, Jun 26, 2023 at 4:04 PM TTT <[email protected] <mailto:[email protected]> > wrote:

It looks like if I call Getvar and pass PJSIP_HEADERS() I can get the entire SIP header for a channel.  I also read (on stackoverflow) that the PJSIP_HEADER function will only return the headers from the INVITE of the inbound channel.

 

If that’s correct, how would I get the headers from the outbound channel (second leg of the bridged call) INVITE ?  Or will PJSIP_HEADERS() in fact return the header from either inbound out outbound legs?

 

The answer is, you can't. There are SOME protocol level things accessible using CHANNEL[1] but that's it.

 

[1] https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+Function_CHANNEL

 

-- 

Joshua C. Colp

Asterisk Project Lead

Sangoma Technologies

Check us out at www.sangoma.com <http://www.sangoma.com>  and www.asterisk.org <http://www.asterisk.org>

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