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Hi, Jan!<br>
<br>
I am glad you are interested in developing a small feature in
OpenSIPS, but you should have opened this discussion on the devel
list[1].<br>
Your assumption is right, the rtpproxy_offer/answer functions don't
accept variables as arguments.<br>
In order to change that, you will have to modify the
rtpproxy_offer/answer functions interface. Each module has to
declare a "static cmd_export_t" structure, that contains information
about the functions the module exports. For nathelper, this
structure is declared in "modules/nathelper/nathelper.c", line ~430.
Each function contains the name used in the script, the equivalent C
function that handles the processing, the number of parameters it
can take, a fixup function, plus some other information. This fixup
function is the one that parses the string ("wz$avp(s:mode)" in your
case), and builds a structure that can be evaluated when the
function is called. <br>
If you need an example of how this is done, you can take a look at
the registrar module. You can find the export structure in
"modules/registrar/reg_mod.c", line ~138. "save" and "lookup" are
two functions that accept variables in the second argument (take a
look at the "registrar_fixup" C function, that parses the 3
parameters). This approach is also used in textops module for the
"add_body" function, or "append_hf", "insert_hf", in the exec module
for all the functions and other places.<br>
If you need any more help, please send a mail on the devel list.<br>
<br>
[1] <a class="moz-txt-link-abbreviated" href="mailto:devel@lists.opensips.org">devel@lists.opensips.org</a><br>
<br>
Regards,<br>
<pre class="moz-signature" cols="72">--
Răzvan Crainea
OpenSIPS Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
<br>
On 02/09/2012 12:26 AM, Jan Blom wrote:
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<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am using OpenSIPS
1.6.4-2 and rtpproxy 1.2.1. I was trying to use an avp as
part of the argument to Nathelper’s rtpproxy_offer() and
rtpproxy_answer() functions. Like:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:65.2pt"><span
lang="EN-US">rtpproxy_offer("wz$avp(s:mode)");<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This doesn’t work and
results in the following log line:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:65.2pt"><span
lang="EN-US">ERROR:nathelper:force_rtp_proxy_body: unknown
option `$'<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I guess these functions
are not prepared to handle variables as arguments. I would
like to fix this in the source, but would appreciate some
pointers on what to actually change. I guess there are
number of similar places that does this right.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jan Blom<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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