[OpenSIPS-Users] different ip in from as initial invite

[Miha]

Liviu

thank you very much for your quick answer! I will try then to stick as 
it is as it is the right way. If there will be no other choise that 
maybe i try this.

thank you again!
miha

Liviu Chircu je 1/28/2020 ob 1:52 PM napisal:
> On 28.01.2020 14:43, Miha via Users wrote:
>> Costumer is saying that he expects from like it was send in 200ok 
>> (not in inital invite, tag and CALLERID stays always the same) and we 
>> should confirm with ACK that has from same as in 200 ok from them.
>
> Hi miha,
>
> That is complete nonsense, RFC 3261 is on your side, section § 8.2.6.2:
>
>    The From field of the response MUST equal the From header field of
>    the request.  The Call-ID header field of the response MUST equal the
>    Call-ID header field of the request.  The CSeq header field of the
>    response MUST equal the CSeq field of the request. The Via header
>    field values in the response MUST equal the Via header field values
>    in the request and MUST maintain the same ordering.
>
> However, if you are really keen to help them out... maybe you could 
> store their
> 200 OK From header in a $dlg_val, then fix the ACK's From header to 
> use this val.
>
> But how will you handle the From header for other sequential 
> requests?  And if these
> requests are initiated by the downstream side, you will have to change 
> the To instead
> of the From, as the UAC must swap them!  We are basically opening 
> Pandora's Box by
> doing down this route.  It's not impossible to get right, but it will 
> take some work.
>
> Regards,
>
> -- 
> Liviu Chircu
> www.twitter.com/liviuchircu  |www.opensips-solutions.com
>
> OpenSIPS Summit, Amsterdam, May 2020
>    www.opensips.org/events
> OpenSIPS Bootcamp, Miami, March 2020
>    www.opensips.org/training

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