[OpenSIPS-Users] Strange multiple replicated registers

[Bogdan-Andrei Iancu]

Hi Julian,

There are 2 REGISTERs because of authentication - first is without 
credentials, the second has credentials (as a reaction of the auth 
challenge from the first REGISTER)

In the second trace, the additional REGISTERs from master to slave are 
SIP transmissions (the t_replicate() acts as a t_relay(), so it does 
retransmissions until it gets a reply back) - I see not SIP reply from 
the slave back to master

Best regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 17.11.2015 18:37, Julian Santer wrote:
> Hi guys,
>
> we have encountered the following problem.
> Our UAC (Snom 760) sends 2 register for the same contact to our edge 
> servers.
> Our edge server sends the register to registrar (master). The 
> registrar replicates the register to the registrar (slave).
> The flow of first register seems ok 
> (http://siptrace.rolbox.net/register_first.html).
> The second register ends also in a 200 OK. But the register master 
> replicates the register 9 times 
> (http://siptrace.rolbox.net/register_second.html).
>
> So my qeustions are:
> - why the UAC send the register twice for the same contact? Also other 
> clients like a AVM Fritzbox send the register twice.
> - why the registrar master replicates the register multiple times?
>
> IP's and domains are obfuscated.
>
> On the edge server we do (5.6.7.8):
>
>     $rd = "5.6.7.9";
>     t_on_branch("BR_REGISTER");
>     if (! t_relay("0x05"))
>     {
>         send_reply("500", "Internal server error - failed to relay");
>         xlog("L_ERR", "Unable to relay REGISTER - LF_BASE");
>     }
>     xlog("L_INFO", "Routing register to registrar - LF_BASE");
>
> On the registrars (5.6.7.9 and 5.6.7.10):
>
>     xlog("L_INFO", "REGISTER received from $si - LF_BASE");
>
>     if (src_ip == 5.6.7.9 || src_ip == 5.6.7.10)
>     {
>         if (! save("LOCATION_DB", "vmrp1"))
>         {
>             xlog("L_ERR", "Saving contact from master failed - LF_BASE");
>             exit;
>         }
>         xlog("L_INFO", "Saving contact received from master - LF_BASE");
>         t_on_branch("BR_DROP");
>     }
>     else
>     {
>         if(!save("LOCATION_DB", "vp1"))
>         {
>             xlog("L_ERR", "Saving contact from edge failed - LF_BASE");
>             t_replicate("sip:REGISTRAR_SLAVE", "0x04");
>             exit;
>         }
>         xlog("L_INFO", "Saving contact received from edge, replicate 
> to REGISTRAR_SLAVE - LF_BASE");
>         t_replicate("sip:REGISTRAR_SLAVE", "0x04");
>         t_on_branch("BR_DROP");
>     }
>
>     if ($(hdr(Contact)) == null)
>     {
>         xlog("L_INFO", "Retrieving locations - LF_BASE");
>     } else {
>         xlog("L_INFO", "Registration successful - LF_BASE");
>     }
>     exit;
>
> LOCATION_DB is the location table name for the registrars (2 
> registrars, 2 tables)
> REGISTRAR_SLAVE is the domain name of the respective registrar slave.
> The servers are in the same network, connected over layer 2.
>
> Let me know if you need further informations.
>
> Best regards,
> Julian Santer
> Raiffeisen OnLine
>
>
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