[reSIProcate] B2BUA and SdpContents::Session::Medium questions

[Daniel Pocock]

Hi,

I've just started experimenting with resiprocate and DUM.

I thought it would be interesting to start off by writing a B2BUA, as I 
couldn't find a demonstration one anywhere.

The B2BUA links to rtpproxy using a unix socket, so that the media 
stream won't go between the two endpoints.

Anyhow, now that I've got this working I've got some questions:

- is there already a working open source example B2BUA using resiprocate 
and/or DUM?

- when I rewrite the RTP media ports, I notice that there is no easy way 
to clone the SdpContents::Session::Medium object and retain all the 
existing values while changing the port number (private variable 
mPort).  I must confess to being more of a Java developer than a C++ 
expert, but nonetheless I'd like to find the most efficient way to clone 
these Medium objects - can someone please give me an example or point me 
in the right direction.  If I just clone the object, there appears to be 
no way to do `setPort(value from rtpproxy)'

- has anyone got any tips on rewriting SDP to be compatible with 
rtpproxy?  I presume there are some things that rtpproxy can't handle, 
like TCP, so I intend to remove obvious things like that from the SDP offer.

Regards,

Daniel
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