A : c language to realize the legitimacy of IP verified. For example : 1:1.1.1.1.1 2:0.1.1.1 3 : 1.2.3. ah, etc. is not legitimate IP addresses. B : two subnetworks judgment is not in the same network segment, and so on. Previously shown in the specific example.

ip_test.cpp
ip_test.exe
ip_test.plg

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