[OpenSIPStack] Writing Custom UA Using OpenSIPStack - Was Re: TCP and TLS Support

[<jo...@op...>]

Hi Marshall,

I am creating a new thread for this.

Since there is lack of documentation currently, I am providing you the 
next best thing.  I coded a template user agent and demonstrated how to 
do outbound calls.  Attached is the cxx file.  I have compiled and 
tested this code to be working using the current opensipstack in CVS.

HTH,

Joegen


>   For outgoing calls, we need something like this:
>
> 1.    Our app will setup an RTP ip/port to listen on (UDP).
>
> 2.    Our app will give this RTP ip/port information (as well as any 
> other necessary info) to the opensipstack
> to make a call (INVITE and such).
>
> 3.    The SIP stack will negotiate with the destination SIP stack 
> (wherever that might be). The negotiation,
> of course, will tell us what ip/port to send the RTP for outgoing 
> voice. We need a mechanism to receive
> this info after the SIP portion of the call as been accepted by the 
> foreign site.
>
> 4.    Now the SIP part is done (w/o using the opensipstack RTP 
> handling facilities)
>
> 5.    Now it is the job of our code to send/receive RTP from the 
> foreign host, and walaa all it happy.
>
> 6.    We also need to be able to send/receive the call terminations 
> (BYEs) and such.
>
>  
>
> For incoming calls, we need something like this:
>
> 1.    We setup the SIP stack to listen on 5060.
>
> 2.    It receives incoming calls, (potentially gives this to our code 
> for approval).
> Or maybe we just want to allow the SIP stack to handle everything SIP 
> relate
>
> 3.    The SIP stack will need to know what RTP port we want to listen 
> on (maybe it should ask us)
>
> 4.    Once a call is setup, again, it is our code that will be 
> sending/receiving RTP.
>
>  
>