经常有对P2P原理的讨论，但是讨论归讨论，很少有实质的东西产生（源代码）。呵呵，在这里我就用自己实现的一个源代码来说明UDP穿越NAT的原理。-often principle of peer-to-peer discussions, but the discussions under discussion, with little substantive things have (source code). Oh, I am here on their own to achieve one of

P2P。。 比较简单 代码不超过 50行。。 我说的是核心代码， 希望可以帮助到大家-P2P. . Relatively simple code does not exceed 50 lines. . I am talking about is the core code, I hope everyone can help to