这是基于TCP协议的NAT穿透技术在P2P中的研究与实现的pdf文件，包括原理，穿透过程，很有参考价值-This is the penetration process of TCP NAT traversal in P2P pdf file, including the principle of great reference value! !

TCP实现P2P通信、TCP穿越NAT的方法-P2P communication method TCP implementation, TCP NAT traversal