Question

Possible Duplicate:
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++ ?

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);

Answer 1

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”)