Hi, your header need to be inside dial, not before 
pbx_exec(chan, "Dial(PJSIP/101@trunk-test,10, b(predial-vars,s,1) )"); 

And context: 

[predial-vars] 
exten=> s,1,Set(PJSIP_HEADER(add,X-VSPhone-Case)=${X-VSPhone-Case})) 



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De: "Benoit Duverger" <bduver...@atwtech.com> 
Para: "Asterisk Developers Mailing List" <asterisk-dev@lists.digium.com> 
Enviadas: Quarta-feira, 21 de outubro de 2020 14:28:08 
Assunto: Re: [asterisk-dev] Add SIP Header with PJSIP in C module 

Thanks for your quick answer. 
I'm not sure to understand how Pre-Dial Handlers can help my module written in 
C. But if I decide to rewrite this module in asterisk language, that could help 
me. For the moment I hope to fix my C module. 

A big resume of what this part of my module do is: 
pbx_exec(chan, "SipAddHeader(X-MyHeader:valuetest)"); 
pbx_exec(chan, "Dial(SIP/101@trunk-test,10)"); 
That works in asterisk 1.8, 11 and probably in asterisk 16 if I use chan_sip 
but SipAddHeader is no longer a valid application in my asterisk because I 
don't load chan_sip.so, just all modules related to PJSIP. 

So with PJSIP, I try: 
pbx_builtin_setvar_helper(chan, "PJSIP_HEADER(add,X-MyHeader)", "valuetest"); 
pbx_exec(chan, "Dial(PJSIP/101@trunk-test,10)"); 

I didn't have any errors but my header is not added. 

Thanks 


Le mer. 21 oct. 2020 à 12:23, Richard Mudgett < [ mailto:rmudg...@digium.com | 
rmudg...@digium.com ] > a écrit : 



You add headers in a similar way as before. It is just a matter of adding them 
to the right channel. 
You must add them to the outgoing channel for PJSIP. This can be accomplished 
by using pre-dial handlers [1][2]. 

Richard 

[1] [ https://wiki.asterisk.org/wiki/display/AST/Pre-Dial+Handlers | 
https://wiki.asterisk.org/wiki/display/AST/Pre-Dial+Handlers ] 
[2] [ https://www.asterisk.org/dialplan-handler-routines-allow-customization/ | 
https://www.asterisk.org/dialplan-handler-routines-allow-customization/ ] 

On Wed, Oct 21, 2020 at 10:49 AM Benoit Duverger < [ 
mailto:bduver...@atwtech.com | bduver...@atwtech.com ] > wrote: 

BQ_BEGIN

Hello, 

We have a module written in C which was developed initially for asterisk 1.4, 
modified a few years ago to run in asterisk 1.8 then 11. This module is used to 
verify user's limits, route calls etc... 
Actually, I try to adapt it to run in asterisk 16, I moved from chan_sip to 
PJSIP and I don't know how can I add SIP Headers into the channel. With 
chan_sip we used that: 
sprintf( cmd, "SipAddHeader(command:%s)", command ); 
res = astcmd( chan, cmd ); 
astcmd is a custom function wrapped onto pbx_exec(). 

I tried to use pbx_builtin_setvar_helper(), with the function PJSIP_HEADER() 
but I didn't see any custom headers in SIP... and no errors, res = 0. 
res = pbx_builtin_setvar_helper(chan, "PJSIP_HEADER(add, X-test)", "test"); 


How can I use PJSIP_HEADER in a C module ?, which libraries should I need to 
import ? 

Thanks 

-- 
Benoit 
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