[SR-Users] Kamailio second contact header

[Ali Taher]

Hi,

 

I tried to not calling append_branch() when last successful next_gw() using
below code :

 

$var(z)=0;

$var(a)=0;

if (!load_gws(1, $rU, $fu)) 

                                                                  {

                  sl_send_reply("502", "Unable To lOad GatEwAyS");

                  exit; }

while(next_gw()) $var(z) = $var(z) +1;

xlog("L_INFO", "number of gateways : $var(z)\n");   

load_gws(1, $rU, $fu);

 

                                                while (next_gw()){

                                xlog("L_INFO", "gateway is : $ru\n");  

                                $var(a)=$var(a)+1;

                                if($var(a)!=$var(z))append_branch();

                                

                                }

 

In this case I'm getting in contact headers the following gateways : 3,1,2

 

Regards,

Ali

From: Ali Taher [mailto:ataher at vanrise.com] 
Sent: Thursday, June 04, 2015 5:44 PM
To: miconda at gmail.com; 'Kamailio (SER) - Users Mailing List'
Cc: 'Ali Taher~Vanrise Technical Support'
Subject: RE: [SR-Users] Kamailio second contact header

 

Hi Daniel,

 

If it is the case then the ordering shouldn't be 1,2,3,3  ?  but I'm getting
3,1,2,3.

I tried to set $(branch(uri)[-1]) = $null; after the while block , but
nothing changed :(

 

Thanks,

Ali

 

From: Daniel-Constantin Mierla [mailto:miconda at gmail.com] 
Sent: Thursday, June 04, 2015 5:28 PM
To: Ali Taher; 'Kamailio (SER) - Users Mailing List'
Subject: Re: [SR-Users] Kamailio second contact header

 

Hello,

next_gw() is also setting the r-uri, so for the last successful next_gw()
you should not call anymore append_branch(). Try to remove the last branch
after the while block:

$(branch(uri)[-1]) = $null;

Cheers,
Daniel

On 04/06/15 16:01, Ali Taher wrote:

Hi Daniel,

 

I'm using this method because I'm having issue with append_branch where last
gateway is listed first.

For example if gateways are ordered in LCR_rule_target as 1,2,3  , I'm
having them in contact header as : 3,1,2,3

 

I'm using below code : 

 

if (!load_gws(1, $rU, $fu)) {

 

                  sl_send_reply("502", "Unable To lOad GatEwAyS");

 

                  exit;}

 

                  while(next_gw()){

                  append_branch(); }

                  sl_send_reply("302","Moved Temporary");

                  exit;                                     

                }  

 

Any hint regarding the above would be appreciated.

 

Regards,

Ali

 

From: sr-users [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of
Daniel-Constantin Mierla
Sent: Thursday, June 04, 2015 4:41 PM
To: Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] Kamailio second contact header

 

Hello,

the r-uri is added as a Contact address for 3xx replies -- I don't remember
if this is some RFC requirement or just an implementation of the sl function
for 3xx replies (well, I haven't implemented those function either).

The active branches of the request are added as contact header to the reply.
So you can practically use append_branch() as many times as you need and
then do sl_send_reply("3xx", ...). You don't need to append headers to
replies explicitely.

Cheers,
Daniel

On 04/06/15 13:59, Ali Taher wrote:

Hello,

 

I'm trying to build new contact header that will be sent from Kamailio as
below :

 

 

load_gws(1, $rU, $fu);

append_to_reply("Contact:");

                                                while (next_gw())

                                {

 
append_to_reply("$ru");

                                }

                                append_to_reply("\r\n");

                                sl_send_reply("300","Multiple Choices");

                exit;   

 

 

yet I'm getting two Contact headers as shown in below SIP message.

How can I remove second contact header (highlighted below in gray)

 

Via: SIP/2.0/UDP
192.168.26.3:42528;branch=z9hG4bK-d8754z-4c2cc56c3145b446-1---d8754z-;rport=
42528;received=192.168.26.3

To: "9612" <sip:9612 at 192.168.110.181>
<sip:9612 at 192.168.110.181>;tag=b27e1a1d33761e85846fc98f5f3a7e58.1a8d

From: "test" <sip:test at 192.168.110.181>
<sip:test at 192.168.110.181>;tag=8571af74

Call-ID: Y2MzOTNiOGRhMTc2NDkwZjIxNzZhYTAzZmM0OGE3NDY

CSeq: 2 INVITE

Contact:
sip:9612 at C001,sip:9612 at 192.168.26.1,sip:9612 at 192.168.26.6,sip:9612 at 192.168.2
6.8

Contact: sip:9612 at 192.168.26.8

Server: kamailio (4.1.8 (x86_64/linux))

Content-Length: 0

 

 

Thanks,

Ali






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-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda <http://twitter.com/#%21/miconda>  -
http://www.linkedin.com/in/miconda
Book: SIP Routing With Kamailio - http://www.asipto.com

 

-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Book: SIP Routing With Kamailio - http://www.asipto.com
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