How to determine if a string is a valid IPv6 address in C++? [duplicate]

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IPv6 parsing in C

I need to check strings if they are valid IPv6 addresses in C++.

There are elegant solutions for C# here and rather ugly regex here.

Is there a good way to do this in C++ ?

开发者_C百科

I'm currently using this, but it doesn't work on Windows XP (inet_pton() is missing):

unsigned char buf[sizeof(struct in6_addr)];
bool isvalid= inet_pton(PF_INET6, (const char *)addr, buf);

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You can use getaddrinfo in Linux, or in Windows since Windows 2000. (See the section of that document page entitled "Example code using AI_NUMERICHOST")

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You can use WSAStringToAddress, available since Windows 2000.