Based on the raw socket client and server programming, can be given in the system behind the IP header custom one IP header, and then build a TCP/UDP headers and data sent between the client and server.

原始socket编程具有两个IP头IP包
..............................\client
..............................\......\aaaaaaaaa
..............................\......\.........\Debug
..............................\......\.........\aaaaaaaaa.dsp
..............................\......\.........\aaaaaaaaa.dsw
..............................\......\.........\aaaaaaaaa.ncb
..............................\......\.........\aaaaaaaaa.opt
..............................\......\test_client
..............................\......\...........\Debug
..............................\......\...........\.....\client.obj
..............................\......\...........\.....\test_client.exe
..............................\......\...........\.....\test_client.ilk
..............................\......\...........\.....\test_client.pch
..............................\......\...........\.....\test_client.pdb
..............................\......\...........\.....\vc60.idb
..............................\......\...........\.....\vc60.pdb
..............................\......\...........\client.cpp
..............................\......\...........\test_client.dsp
..............................\......\...........\test_client.dsw
..............................\......\...........\test_client.ncb
..............................\......\...........\test_client.opt
..............................\......\...........\test_client.plg
..............................\ipip
..............................\....\Debug
..............................\....\.....\ipip.exe
..............................\....\.....\ipip.ilk
..............................\....\.....\ipip.obj
..............................\....\.....\ipip.pch
..............................\....\.....\ipip.pdb
..............................\....\.....\vc60.idb
..............................\....\.....\vc60.pdb
..............................\....\ipip.cpp
..............................\....\ipip.dsp
..............................\....\ipip.dsw
..............................\....\ipip.ncb
..............................\....\ipip.opt
..............................\....\ipip.plg
..............................\....\udp.c
..............................\....\udp.h
..............................\server
..............................\......\server
..............................\......\......\Debug
..............................\......\......\.....\server.exe
..............................\......\......\.....\server.ilk
..............................\......\......\.....\server.pch
..............................\......\......\.....\server.pdb
..............................\......\......\.....\test_server.obj
..............................\......\......\.....\vc60.idb
..............................\......\......\.....\vc60.pdb
..............................\......\......\server.dsp
..............................\......\......\server.dsw
..............................\......\......\server.ncb
..............................\......\......\server.opt
..............................\......\......\server.plg
..............................\......\......\test_server.cpp

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