[OpenSIPS-Users] B2b module topology hiding

[Douglas Lane]

Hi Anca,

I was wondering about that because I saw the tm:t_uac:next_hop part 
pointing to the RURI, and then attempts to lookup the domain and SRV 
records.

I also noticed that my script was sending two 100 trying messages, which 
after removing my manual sl_send one, i was still getting a 100 trying 
message even though my t_relay has 0x01 flag set.

Can I assume the following then:
An INVITE from a UAC to the OpenSIPS SBC should only ever call the 
b2b_init on replies from the OpenSIPS Router server, as that is the 
topology we want to hide.
Calls originating from the OpenSIPS Router server must also call the 
b2b_init for topology hiding.

Or have I missed the boat here?

Thanks
Doug


On 2010/05/26 11:53 AM, Anca Vamanu wrote:
> Hi Douglas,
>
> First there is an important thing that you misunderstood: if you call
> the B2B topology hiding on a request, that request should be dropped
> after not sent on the other side. The B2BUA will generate a completely
> new request with the information from the first one but putting itself
> as the Contact and not including the route headers. This request will be
> routed according to the information in RURI and if it points to the same
> machine, you will receive this message in the script. You can apply
> different routing logic by checking if src_ip and src_port equal the ip
> and port of the machine.
>
> Regards,
>
>