[OpenSIPS-Users] Equal priority and weight SRV authentication

[Chris Maciejewski]

Hello Bogdan,

Thank you for explanation.

Could you please point me in the right direction to Documentation
where I can find functions to retrieve nonce<->server mapping
information from localcache?

If SRV record in this scenario would have SRV 1 - priority 10, SRV 2 -
priority 20, would OpenSIPS always send requests to SRV 1 (and only
switch to SRV 2 in case SRV 1 is down)?

Best regards,
Chris

On 22 April 2013 12:21, Bogdan-Andrei Iancu <bogdan at opensips.org> wrote:
> Hello Chris,
>
> The INVITE (2) is not a re-INVITE, but an initial INVITE - it does not
> belong to the same dialog as INVITE (1).
>
> Considering that they are 2 different initial requests, based on DNS lookup,
> it is impossible to force their routing to the same back server (at least
> not based on SIP signalling).
>
> A solution may be:
>     - when the 407 is send back to uac, opensips makes an short entry (10
> secs lifetime) in localcache, remembering the mapping between the auth nonce
> and the server which generated it.
>     - when opensips receives an INVITE with credential, you check in
> localcache for the mapping with received nonce -> you will know where to
> send it (the server).
>
> So you actually do DNS only for the INVITEs without credentials.
>
> Best regards,
>
> Bogdan-Andrei Iancu
> OpenSIPS Founder and Developer
> http://www.opensips-solutions.com
>
>
>
> On 04/21/2013 11:26 AM, Chris Maciejewski wrote:
>>
>> Hi,
>>
>> I have a scenario where OpenSIPS relays proxy authentication to PSTN
>> gateway which uses SRV records of equal priority and weight. Example
>> SIP diagram can be found below:
>>
>> https://dl.dropboxusercontent.com/u/3182365/OpenSIPS-SRV-Auth.pdf
>>
>> Would it be possible to make OpenSIPS send Re-INVITE marked as (2) in
>> diagram above to the same host where initial INVITE was sent?
>>
>> Kind regards,
>> Chris
>>