[OpenSIPS-Users] Proxy on INVITE with auth

[Bogdan-Andrei Iancu]

Hello Igor,

Right now OpenSIPs does not support increasing the cseq during UAC 
authentication. At the end this is a limitation of the a proxy versus a 
B2B :)

Best regards,

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

On 09/25/2017 04:00 PM, Igor Olhovskiy wrote:
> Hi!
>
> I’m trying to implement scenario, when OpenSIPS would be a proxy for 
>  IP auth SIP side and username/pass auth other side.
> So, call scenario would be like
>
> 1. A -> INVITE -> OpenSIPS         B
> 2. A                       OpenSIPS ->       INVITE   -> B
> 3. A                       OpenSIPS <-         401    <- B
> 4. A                       OpenSIPS -> INVITE (auth)  -> B
> 5. A                       OpenSIPS <-          200     <- B
> 6. A  <- 200 <-    OpenSIPS
>
> But the problem is in CSeq. On step 4, when sending INVITE with Auth 
> CSeq should be changed from original (usually incremented), but on 
> step 6, when replying back to A, it should be original.
>
> I didn’t found better solution, than to manually manipulate with CSeq 
> with append/remove headers.
> So, maybe there is more OpenSIPS - wise way of doing this?
>
> Regards, Igor
>
>
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