[SR-Users] Setting Kamailio User-Agent dynamically

[Daniel-Constantin Mierla]

I just commented on the other email you send, try with something like:

user_agent_header="X-Proxy: xyz"

Cheers,
Daniel

On 09/10/14 12:08, Errol Samuels wrote:
> Just found something interesting.
>
> I just commented out the "user_agent_header" in the Global section and 
> restarted kamailio and now the REGISTER message seems to be completely 
> intact but now we have two occurrences of the User-Agent.  I tried 
> doing the remove_hf("User-Agent) but it doesn't seem to have any effect.
>
> U 184.xx.xx.208:5060 -> 184.xx.xx.198:6060
> REGISTER sip:184.xx.xx.198:6060 SIP/2.0.
> Via: SIP/2.0/UDP 184.154.215.238;branch=z9hG4bK323.a0452631.0.
> To: <sip:205 at pbx.mydomain.com <mailto:sip%3A205 at pbx.mydomain.com>>.
> From: <sip:205 at pbx.mydomain.com 
> <mailto:sip%3A205 at pbx.mydomain.com>>;tag=6f72f76f3402bf7cf11f6917529ca761-b489.
> CSeq: 10 REGISTER.
> Call-ID: 6ac0486a044f66e5-62858 at 184.xx.xx.208.
> Max-Forwards: 70.
> Content-Length: 0.
> *User-Agent: kamailio (4.0.6 (x86_64/linux)).*
> Contact: <sip:205 at pbx.mydomain.com 
> <mailto:sip%3A205 at pbx.mydomain.com>;fs_path=sip:184.xx.xx.208:5060>.
> *User-Agent: Yealink SIP-T46G 28.72.0.26.*
> Expires: 120.
> .
>
> Any ideas?
>
> BR
>
> Errol
>
> On Wed, Oct 8, 2014 at 6:25 PM, Errol Samuels <ewsamuels at gmail.com 
> <mailto:ewsamuels at gmail.com>> wrote:
>
>     I followed Daniel's instructions and made some progress but not
>     100% there yet.
>
>     -------[Global section]----------
>
>     user_agent_header=""
>
>     -------[Main Routing Logic]-------
>
>     # handle registrations
>             if (is_method("REGISTER"))
>             {
>             $avp(new_user_agent) = $ua;
>             }
>             route(REGISTRAR);
>     .
>     .
>
>     # Forward REGISTER to Freeswitch
>     route[REGFWD] {
>
>             if(!is_method("REGISTER"))
>             {
>                     return;
>             }
>             route(DISPATCH);
>             $uac_req(method)="REGISTER";
>             $uac_req(ruri)=$du;
>             $uac_req(furi)=$fn + "<sip:" + $au + "@" + $ar + ">";
>             $uac_req(turi)=$tn + "<sip:" + $au + "@" + $ar + ">";
>             $uac_req(hdrs)="Contact: <sip:" + $au + "@"
>                                     + $ar
>                                     + ";fs_path=sip:"
>                                     + $sel(cfg_get.kamailio.bindip)
>                                     + ":" +
>     $sel(cfg_get.kamailio.bindport)
>                                     + ">"
>                                     + "\r\n";
>             if($sel(contact.expires) != $null)
>                     $uac_req(hdrs)= $uac_req(hdrs) + "Expires: " +
>     $sel(contact.expires) + "\r\n";
>             else
>                     $uac_req(hdrs)= $uac_req(hdrs) + "Expires: " +
>     $hdr(Expires) + "\r\n";
>             $uac_req(hdrs)= $uac_req(hdrs) + "User-Agent: " +
>     $avp(new_user_agent) + "\r\n";
>             uac_req_send();
>             exit;
>     }
>     #!endif
>
>     ------------
>
>     Now the correct User-Agent appears in the REGISTER message but in
>     Freeswitch it shows as unknown.
>
>     U 184.xx.xx.208:5060 -> 184.xx.xx.198:6060
>     REGISTER sip:184.x.x.198:6060 SIP/2.0.
>     Via: SIP/2.0/UDP 184.xx.xx.208;branch=z9hG4bKa764.668d6dc7.0.
>     To: <sip:1001 at pbx.mydomain.com <mailto:sip%3A1001 at pbx.mydomain.com>>.
>     From: <sip:1001 at pbx.mydomain.com
>     <mailto:sip%3A1001 at pbx.mydomain.com>>;tag=6f72f76f3402bf7cf11f6917529ca761-2ceb.
>     CSeq: 10 REGISTER.
>     Call-ID: 4570a277563cdffc-61869 at 184.xx.xx.208.
>     Max-Forwards: 70.
>     Content-Length: 0.
>     .
>     Contact: <sip:1001 at pbx.mydomain.com
>     <mailto:sip%3A1001 at pbx.mydomain.com>;fs_path=sip:184.xx.xx.208:5060>.
>     Expires: 120.
>     User-Agent: Yealink SIP-T46G 28.72.0.26.
>     .
>     ----------------
>
>     Got some extra dots in there but not sure why they are there and
>     how they got there.
>     Any ideas? Anything I missed?
>
>     BR
>
>     Errol
>
>
>
>     On Wed, Oct 8, 2014 at 12:34 PM, Daniel-Constantin Mierla
>     <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>
>         Perhaps you can get it with adding User-Agent header to
>         $uac_req(hdrs):
>
>         $uac_req(hdrs)= $uac_req(hdrs) + "User-Agent: " + $ua + "\r\n";
>
>         And sent the global parameter:
>
>         user_agent_header=""
>
>         But then no local generated request has user agent, which
>         probably is ok for you.
>
>         There are still ways to use event_route[tm:local-request] to
>         set a custom user agent header, but would require something like:
>         - add $us in $uac_req(hdrs) as X-UA header
>         - in event_route[tm:local-request], remove User-Agent and X-UA
>         headers and add again User-Agent taking the value from X-UA
>
>         Cheers,
>         Daniel
>
>
>
>
>
>

-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

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