the principle and source code, I used one of their own to achieve the source code to illustrate UDP Through NAT principle and the source code for your consideration

Packet : 19854833p2pudp.zip filelist
P2P之UDP穿透NAT的原理与实现源代码/
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/Exception.h
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/P2PClient.cpp
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/P2PClient.dsp
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/P2PClient.dsw
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/P2PClient.ncb
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/P2PClient.opt
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/P2PClient.plg
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/P2PClient.sln
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/P2PClient.suo
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PClient/P2PClient.vcproj
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/P2PServer.cpp
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/P2PServer.dsp
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/P2PServer.dsw
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/P2PServer.ncb
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/P2PServer.opt
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/P2PServer.plg
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/P2PServer.sln
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/P2PServer.suo
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/P2PServer/P2PServer.vcproj
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/proto.h
P2P之UDP穿透NAT的原理与实现源代码/www.cnzz.cn/UDP穿越NAT.TXT
P2P之UDP穿透NAT的原理与实现源代码/使用说明.CHM

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．