[OpenSIPS-Users] Query about avp in siptrace module

[Ramachandran, Agalya (Contractor)]

Hi Daniel,

I got your point. So every time when we use ‘siptrace’ module we need to give some value for $avp(traced_user) right? Else AVP value will be NULL.
Am I understanding it right?
Just adding the line $avp(traced_user) = "1";  in config file will solve the issue? Or we need to include
modparam("siptrace", "traced_user_avp", "$avp(traced_user)") also in the config file?
Regards,
Agalya
From: users-bounces at lists.opensips.org [mailto:users-bounces at lists.opensips.org] On Behalf Of Daniel Zanutti
Sent: Monday, March 21, 2016 1:20 PM
To: OpenSIPS users mailling list <users at lists.opensips.org>
Subject: Re: [OpenSIPS-Users] Query about avp in siptrace module

Correcting:
$avp(traced_user) = "1";

On Mon, Mar 21, 2016 at 2:19 PM, Daniel Zanutti <daniel.zanutti at gmail.com<mailto:daniel.zanutti at gmail.com>> wrote:
Hi

AVP is a kind of variable on Opensips.

When you configured the siptrace module to use the AVP, you must ensure that the AVP has some kind of value before routing the package, otherwise it will be NULL. Just add this on first line of main route:
$avp(traced_user) = 1;





On Mon, Mar 21, 2016 at 12:46 PM, Ramachandran, Agalya (Contractor) <Agalya_Ramachandran at comcast.com<mailto:Agalya_Ramachandran at comcast.com>> wrote:
Hi All,

Anyone can help me out for the below issues and questions I have?

Regards,
Agalya

From: users-bounces at lists.opensips.org<mailto:users-bounces at lists.opensips.org> [mailto:users-bounces at lists.opensips.org<mailto:users-bounces at lists.opensips.org>] On Behalf Of Ramachandran, Agalya (Contractor)
Sent: Thursday, March 17, 2016 10:28 AM
To: users at lists.opensips.org<mailto:users at lists.opensips.org>
Subject: [OpenSIPS-Users] Query about avp in siptrace module

Hi,

Am Agalya and we are using opensips for our project and using “siptrace” module to trace and duplicate the sip packets to another server.
When trying to do so, am getting the below error.

Mar  2 14:48:21 poc-opensip-cmc-e-001 /usr/local/sbin/opensips[27754]: DBG:siptrace:trace_onreq_in: trace on req in
Mar  2 14:48:21 poc-opensip-cmc-e-001 /usr/local/sbin/opensips[27754]: DBG:siptrace:trace_onreq_in: nothing to trace...

I thought adding “traced_user_avp” parameter might solve the issue. I have added the below line and tested the same.
But I didn’t get through the error and was still seeing the same error.
modparam("siptrace", "traced_user_avp", "$avp(traced_user)")

As a workaround, I commented the below lines in “siptrace.c” file in function trace_onreq_in(), and it worked for me.
Packets are sent to another server. Following the same I have commented the same line of code wherever it is failing for me.
By adding some debugging statements I found AVP is NULL and (!flag_trace_is_set(msg)) returns 1.
/*if( (avp==NULL) && !flag_trace_is_set(msg))
        {
                LM_DBG("nothing to trace...\n");
                return;
        }*/

Query : What is avp? And when avp is returned NULL?
                 What should I do in order to avoid that error without commenting the code?
                 Why is “traced_user_avp” parameter is used in config file?

It would be great if you help me to come out of this issue. Also am curious what causes this error message.

Regards,
Agalya


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