below is the answer to my own requests Is there an open source iOS (library) that supports the same? Yes, the source code is available, it has a nicer folder. can it be compiled with mac os x and ios with some effort FaceTime on iPhone also uses ICE, STUN, TURN to bypass NAT, just like the IOS SDK provides such APIs? - No I found the nICRr code in the source code (www.resiprocate.org), which I can test on Mac OS X for the STUN part. Has anyone tried to use the same for iOS 4.0 or higher? - it can be easily recompiled into ios4
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