[OpenSIPS-Users] 3.1 - access Path and Via values from REGISTER

Mark Allen mark at allenclan.co.uk
Mon Aug 3 09:13:22 EST 2020

Would I be right in thinking that the reason I cannot immediately see the
"path" value added by the add_path_received() call is because of how the
lumps system works - i.e.

  "lumps are stored in a list, and are only applied
   after the OpenSIPS script is fully executed and
   before the SIP message is relayed. Because of
   this, changes done on a SIP message are not
   immediately reflected on the SIP message upon
   further inspection ( eg. Adding a new header from
   the script and then checking for the header's
   existence )."

From: https://www.opensips.org/Documentation/Development-Manual

On Thu, 30 Jul 2020 at 16:24, Mark Allen <mark at allenclan.co.uk> wrote:

> Seeking to find a workaround for the problem I'm having with WebRTC and
> AOR throttling (
> http://lists.opensips.org/pipermail/users/2020-July/043542.html) I want
> to access the values of the "Via" and "Path" headers that are being passed
> to the registrar.
> Using sngrep on the OpenSIPS server I can see the REGISTER includes Path
> and Via headers. If I try to access them with  $(hdr(Path)[0])  or
>  $(hdr(Via)[0])  I get nothing, but I can access the values of all the
> other headers without any problem - e.g.  $(hdr(Authorization)[0]). What am
> I missing or is there another way to get the info used in the Via
> and particularly in creating the Path header values???
>   add_path_received();
>   xlog("!!!!!!!!!!!! $(hdr(Path)[0]) !!!!!!!!!!");
>   $avp(attr) = $(hdr(Path)[0]);
>   mid_registrar_save("location","p0v");
> The code gives an "attr" value in the "location" table of "NULL"
> /var/log/syslog shows:
>   Jul 30 16:13:17  /usr/sbin/opensips[27423]: !!!!!!!!!!!! <null>
> !!!!!!!!!!
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