I'm working on a little chat app. It's going to function very similar
to a peer to peer app but across the internet. I have found the
information i need on creating a stream once I know the address. but
there will be persons like myself with draconian isp who block gobs of
ports and make it hard to for chat apps to work. So I am curious, how
can I, in a reasonably economic way, find an open port to talk on? Can
I pass null to CFStreamCreatePairWithSocketToHost for the port and
have it find the port on it's own? Or do I need to hard code a port?
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