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Voice calls and Internet chat
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Application background I had spent long times to develop program for voice and text calling. But it was difficult because hole punching is black hole. UDP or TCP hole punching is very difficult to do, because there are many many kinds of NAT devices and servers, gateways and firewalls, etc. Key Technology How can we do hole punching? I think there are many persons who tried it, but it may be not so easy. Yes, it is right. It is not so easy. Hole punching is very complicated process, and as a matter of fact, it is only theory, it is neccessary to know about network devices for it.
codeforge1106
2016-08-23
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