It' s actually a very simple network program, but demonstrates how the internal network through UDP only. I made changes primarily in the test UDP through NAT when a different use for convenience only. So not much changes, added a function and several parameters of the original print no more than some of the information, that' s all. View source it ...

P2PDemo
.......\P2PClient
.......\.........\Debug
.......\.........\.....\BuildLog.htm
.......\.........\.....\mt.dep
.......\.........\.....\P2PClient.bsc
.......\.........\.....\P2PClient.exe
.......\.........\.....\P2PClient.exe.intermediate.manifest
.......\.........\.....\P2PClient.obj
.......\.........\.....\P2PClient.pdb
.......\.........\.....\P2PClient.sbr
.......\.........\.....\vc90.idb
.......\.........\.....\vc90.pdb
.......\.........\Exception.h
.......\.........\P2PClient.cpp
.......\.........\P2PClient.dsp
.......\.........\P2PClient.dsw
.......\.........\P2PClient.ncb
.......\.........\P2PClient.opt
.......\.........\P2PClient.plg
.......\.........\P2PClient.sln
.......\.........\P2PClient.suo
.......\.........\P2PClient.vcproj
.......\.........\P2PClient.vcproj.hbuser-PC.hbuser.user
.......\.........\proto.h
.......\P2PServer
.......\.........\Debug
.......\.........\.....\BuildLog.htm
.......\.........\.....\mt.dep
.......\.........\.....\P2PServer.exe
.......\.........\.....\P2PServer.exe.intermediate.manifest
.......\.........\.....\P2PServer.obj
.......\.........\.....\P2PServer.pdb
.......\.........\.....\vc90.idb
.......\.........\.....\vc90.pdb
.......\.........\Exception.h
.......\.........\P2PServer.cpp
.......\.........\P2PServer.dsp
.......\.........\P2PServer.dsw
.......\.........\P2PServer.ncb
.......\.........\P2PServer.opt
.......\.........\P2PServer.plg
.......\.........\P2PServer.sln
.......\.........\P2PServer.suo
.......\.........\P2PServer.vcproj
.......\.........\P2PServer.vcproj.hbuser-PC.hbuser.user
.......\.........\proto.h

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