[SR-Users] Kamailio second contact header

Daniel-Constantin Mierla miconda at gmail.com
Fri Jun 5 11:48:34 CEST 2015


Hello,

there is no parameter to disable adding new r-uri as a contact, I
suggested to be added.

Meanwhile I looked at the code and there could be an option to get it work.

Append a branch after each next_gw() and before sending reply, do
"revert_uri();" (ie., instead of dropping last branch do revert_uri()).

Cheers,
Daniel

On 05/06/15 09:27, Ali Taher wrote:
>
> Hi Daniel,
>
>  
>
> I tried the following mod param : modparam("sl", "bind_tm", 0), which
> is the only boolean param in sl module , but unfortunately still the same
>
> How could I shift the URIs ?
>
>  
>
> Thanks,
>
> Ali
>
>  
>
> *From:*Daniel-Constantin Mierla [mailto:miconda at gmail.com]
> *Sent:* Friday, June 05, 2015 10:04 AM
> *To:* Ali Taher; 'Kamailio (SER) - Users Mailing List'
> *Subject:* Re: [SR-Users] Kamailio second contact header
>
>  
>
> Hello,
>
> the last address from next_gw() becaomes the last r-uri and that is
> added as first contact. You will have to shift the URIs. Maybe the
> simplest way would be to disable adding r-uri as contact in 3xx via a
> mod param in sl module.
>
> Also, if you use 4.3, might worth looking at rtjson module, you can
> build a json holding the destination addresses in the order you want
> and the push them to r-uri and branches.
>
> Cheers,
> Daniel
>
> On 04/06/15 17:00, Ali Taher wrote:
>
>     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 <mailto: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 L
>
>      
>
>     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 192.168.26.8
>
>             Contact: sip:9612 at 192.168.26.8
>
>             Server: kamailio (4.1.8 (x86_64/linux))
>
>             Content-Length: 0
>
>              
>
>              
>
>             Thanks,
>
>             Ali
>
>
>
>
>
>             _______________________________________________
>
>             SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>
>             sr-users at lists.sip-router.org <mailto:sr-users at lists.sip-router.org>
>
>             http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
>
>
>         -- 
>
>         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://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://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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