Hi Carlos,
 
Please find attached the configuration file which I am using.
Kindly refer route[CNXCC] where I have tried to put the channel limitation per SIP Server.
 
 
Thanks !


On Wed, Jun 4, 2014 at 3:07 PM, Carlos Ruiz Díaz <carlos.ruizdiaz@gmail.com> wrote:
Can you share your configuration file?


On Wed, Jun 4, 2014 at 1:03 AM, Rahul MathuR <rahul.ultimate@gmail.com> wrote:
HI Carlos,
 
Thanks for reply.
 
In my case the key is SIP Server IP. My kamailio Proxy is connected to many sip server IPs say 5. I want to limit maximum channels per sip server ip. So I set max channels per sip server ip as cnxcc_set_max_channels("$var(client1)", "$var(max_chan)"); and my $var(client1) = "10.97.116.36"; is one of 5 sip servers connected to Kamalio.
 
Now I use your cnxcc_get_channel_count("$rd", "$var(count1)")) value(count1) to compare to the max_limit of the channels allowed for this sip server. Psuedo Variable $rd is coming correctly that is same as sips erver IP[$var(client1)].
But the problem is that cnxcc_get_channel_count("$rd", "$var(count1)"))  is always setting the value 1 in $var(count1) variable even though there are more calls runnning than what was set to be max_chan (which was 100 in my case).
 
Any pointers to achieve this matter ?
 
 
  


On Tue, Jun 3, 2014 at 2:18 PM, Carlos Ruiz Díaz <carlos.ruizdiaz@gmail.com> wrote:
Hi Rahul,

I don't understand your example. In that case, you are always using "10.97.116.36" as key, meaning that all calls will be hanging from same root.

If you want to use the request-uri domain part, use $rd, not the full $ru. This will of course lead to 1 call being reported always, since request-URIs tend to be different from each other.

Regards,
Carlos

 


On Tue, Jun 3, 2014 at 7:01 AM, Rahul MathuR <rahul.ultimate@gmail.com> wrote:
Hi Carlos,
 
Sorry for coming late on this one.
 
the ruri value in my example is '10.97.116.36'
and i have tried to configure kamailio to only cater 100 simultaneous calls on this SIP Server (10.97.116.36), after that it is to send 403.
 
Below is the sample logic from kamailio.cfg
***********************************************************************************************************************
  #Below lines to show an example of how I am maintaining the business for Concurrent Call Restriction
  route[CNXCC]
  {
 
          $var(client1)           = "10.97.116.36";
   $var(max_chan)   = 100;
  #!ifdef CNXCC_CHANNEL
          xlog("L_INFO", "Setting up channel based credit control");
 
          $var(max_chan1) = 0;
          $var(retcode)   = cnxcc_set_max_channels("$var(client1)",  "$var(max_chan)");
 
          if ($var(retcode) == -1) {
                  xlog("Error setting up credit control");
                  return;
          }
 
          $var(count1)     = -1;
 
          if (!cnxcc_get_channel_count("$rd", "$var(count1)")) {
                  xlog("Error getting customer's channel count");
          }
          xlog("RAHUL : CNXCC ROUTE: $var(client1) has $var(count1) call(s)");
          xlog("L_INFO", "CNXCC ROUTE: $var(client1) has $var(count1)  call(s)");

 
          if ($var(count1) == $var(max_chan1)) {
                  xlog("Too many channels for customer");
                  sl_send_reply(403, "Forbidden");
 
                   exit;
          }
  #!endif
******************************************************************************************************************************************************
 
Now the problem that I am facing is that with multiple UACs (all with same ruri - 10.97.116.36) dialing some pstn numbers, the value of "count1" remains 1 for all cases. Hence, my purpose is defeated because the restriction is not being laid and more than 'max_chan' no. of callers are able to make the call.
 
Could you please help me achieve this goal.
 
Thanks !
 


On Sat, May 17, 2014 at 2:22 AM, Carlos Ruiz Díaz <carlos.ruizdiaz@gmail.com> wrote:
max_chan is equal to zero? You should put a positive value in here in order to make sense the function call. 

Also, you are using for one call the ID "x.y.z.a", and for the other one $rd. Both should be the same for calls that suppose to be organized in the same group.

Please take a look at the docs.


On Fri, May 16, 2014 at 7:52 PM, Rahul MathuR <rahul.ultimate@gmail.com> wrote:
Further, from the logs it seems that cnxcc_set_max_channels is returning -1 and I have no idea why it is failing.


On Sat, May 17, 2014 at 5:48 AM, Rahul MathuR <rahul.ultimate@gmail.com> wrote:
Hello Carlos,

Many thanks for your help.
I followed the steps you mentioned for CNXCC. But even after making the max. calls to 0, I am still able to connect the call. Below is the excerpt from kamailio.cfg

request_route {        
setflag(DLG_FLAG);        
# per request initial checks        
route(REQINIT);        
# NAT detection        
route(NATDETECT);
.
.
.

        if (is_method("INVITE")) {
                route(CNXCC);
        }
}

#Below lines added by Rahul for Concurrent Call Restriction
route[CNXCC]
{

        $var(client1)           = "x.y.z.a";

#!ifdef CNXCC_CHANNEL  
        xlog("L_INFO", "Setting up channel based credit control");

        $var(max_chan1) = 0;
        $var(retcode)   = cnxcc_set_max_channels("$var(client1)", "$var(max_chan)");

        if ($var(retcode) == -1) {
                xlog("Error setting up credit control");
                return;
        }

        $var(count1)     = -1;

        if (!cnxcc_get_channel_count("$rd", "$var(count1)")) {
                xlog("Error getting customer's channel count");
        }
        xlog("RAHUL : CNXCC ROUTE: $var(client) has $var(count) call(s)");
        xlog("L_INFO", "CNXCC ROUTE: $var(client) has $var(count) call(s)");

        if ($var(count1) == $var(max_chan1)) {
                xlog("Too many channels for customer");
                sl_send_reply(403, "Forbidden");

                #if (!cnxcc_terminate_all("$var(client)")) {
                #       xlog("Error terminating customer's calls");
                #}

                exit;
        }
#!endif


Could you please guide me where am I doing wrong ?


On Sat, May 17, 2014 at 3:01 AM, Carlos Ruiz Díaz <carlos.ruizdiaz@gmail.com> wrote:
Any pseudo variable should work. 

I don't exactly know how your business work, but I'd suggest that instead of using from header domain, use the domain part of the request-uri, $rd.

Regards,
Carlos


On Fri, May 16, 2014 at 4:28 PM, Rahul MathuR <rahul.ultimate@gmail.com> wrote:
Thank you very much Carlos !

One last thing, can I use $fd in cnxcc_set_max_channels as below - 
cnxcc_set_max_channels("$fd", "$var(max_chan)");
to restrict the simultaneous calls hitting a particular domain ?




On Sat, May 17, 2014 at 2:03 AM, Carlos Ruiz Díaz <carlos.ruizdiaz@gmail.com> wrote:


On Fri, May 16, 2014 at 3:28 PM, Rahul MathuR <rahul.ultimate@gmail.com> wrote:
Hello,
Please accept my apologies for asking a simple question - Is there any example which shows how can I create the dialog profile value based on the SIP domain or SIP Server IP (IP like- 112.23.134.5). I need to control many SIP Server IPs with limited channels to each with my Kamailio Proxy.
I am a newbie to kamailio world.

--
Warm Regds.
MathuRahul



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MathuRahul

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MathuRahul



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MathuRahul

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MathuRahul

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MathuRahul

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