[SR-Users] Replicate registration

[Volkan Oransoy]

First of all thank you for your replies.

I think I am quite close to solution. But still have NAT issues in some
cases.

I have added a bunch of code to the standard kamailio script.

I defined a new flag
#!define SOCK_FLAG 8

added these parameters to registrar module.
modparam("registrar", "sock_flag", SOCK_FLAG)
modparam("registrar", "sock_hdr_name", "Sock-Info")

set this flag in the nat test section
        if (nat_uac_test("19")) {
                if (is_method("REGISTER")) {
                        fix_nated_register();
                } else {
                        fix_nated_contact();
                }
                setflag(FLT_NATS);
                setflag(SOCK_FLAG);
        }

and send it to the peer proxy to replicate client registration. I also
added received parameter to the replicated packet.
                if ($si!=$sel(cfg_get.peer.srv_ip))
                {
                        add_rcv_param();
                        t_replicate("sip:10.173.187.226:5060
;transport=udp");
                }


Now, the issue is, the original proxy that receives the registration works
as expected.Replicated proxy, has the location data as expected. But if I
sent a call over second proxy, UA does not respond. I can see the INVITE
packet that comes from replicated proxy on my client PC, but UA does not
respond to INVITE that comes from second proxy.

AOR:: 1002 at test.example.net
Contact:: sip:1002 at 10.173.191.72:1031;transport=udp;registering_acc=test_
example_net Q=
Expires:: 544
Callid:: 443bb84315de2e2b637a55ab44c0b759 at 0:0:0:0:0:0:0:0
Cseq:: 256
User-agent:: Jitsi2.4.4997Linux
Received:: sip:10.173.191.72:1024
State:: CS_NEW
Flags:: 0
Cflag:: 192
Socket:: udp:10.192.208.194:5060
Methods:: 4294967295
Ruid:: uloc-52de6613-3dd4-28
Reg-Id:: 0
Last-Keepalive:: 1390512267
Last-Modified:: 1390512267

This is the ul show output on original proxy. Replicated proxy has nearly
same values except Cflag and Socket. On replicated proxy, Cflag is 0 and
Socket points to the original proxy. Is this output normal? Do I have
anything missing in the setup?

Thanks.

/Volkan


2014/1/21 Daniel-Constantin Mierla <miconda at gmail.com>

>  Hello,
>
> run with debug=3 in config file and see if there are log messages that
> gives you more details about what happens.
>
> Typically, when doing replication, you may need to replicate received and
> sometime socket information -- that can be done via headers and then added
> to avps before saving to location in the second peer. Look at the readme of
> registrar module for those parameters.
>
> Cheers,
> Daniel
>
>
> On 19/01/14 14:05, Volkan Oransoy wrote:
>
> Hi all,
>
>  I am trying to setup an active-active pair of sip proxies. I have
> connected two kamailio boxes to the same PostgreSQL database and my usrloc
> db_mode is 3. I can see the registration data in the database but "ul show"
> outputs of two device is not same. I think writing registration data to the
> same db is not enough.
>
>  I have found a method to replicate the registraiton process. With
> t_replicate, I synchronize REGISTER requests to both boxes. But I had to
> disable shared database because of uniqe id validations.
>
>  route[REGISTRAR] {
>>         if (is_method("REGISTER"))
>>         {
>>                 if(isflagset(FLT_NATS))
>>                 {
>>                         setbflag(FLB_NATB);
>>                 }
>>                 if (!save("location"))
>>                         sl_reply_error();
>>                 t_replicate("sip:10.1.1.2:5060;transport=udp");
>>                 exit;
>>         }
>> }
>
>
>
>  My media servers randomly sends calls to SIP proxies. If Media server
> send the call to the original registrar then the replicated, call initiates
> normally. But when UA registered in first proxy, and Media server sends the
> call to the send one, even if second one has UA in location table, call
> does not initiate.
>
>  Does anyone have an idea about this kind of an active active setup?
>
>  Thanks in advance. Best regards,
>
>  /Volkan
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing listsr-users at lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
> --
> Daniel-Constantin Mierla - http://www.asipto.comhttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
>
>
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