[asterisk-dev] PJSIP Dialog-Info+XML enhancement

[Joshua C. Colp]

On Mon, Oct 29, 2018, at 1:47 PM, Hans-Peter Jansen wrote:
> Dear Asterisk developers,
> 
> in an attempt to add the missing pieces in 
> res/res_pjsip_dialog_info_body_generator.c to provide a similar 
> Dialog-Info+XML implementation, as what chan_sip.so provides already, 
> I invested the better part of today, but things seem to be much more 
> complicated in PJSIP land (at least for somebody, who started to look
> at this code today).
> 
> This is the only missing functionality, that keeps me from transitioning
> to PJSIP, and, if I read the various related complains correctly, a lot of
> other Asterisk users as well. 
> 
> What I found out so far:
> 
> PJSIP version:
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="3" 
> state="full" entity="sip:62 at 192.168.23.2:15060">
>   <dialog id="62" direction="recipient">
>    <state>early</state>
>   </dialog>
>  </dialog-info>

The information does not currently exist in PJSIP, 'nor does it get passed in. The chan_sip module has special logic (find_ringing_channel) local to it to gather the information it thinks is correct which is then placed into the message. The same kind of thing would need to be done in PJSIP.

-- 
Joshua C. Colp
Digium - A Sangoma Company | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
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