'inet_ntop' was not decleared in this scope

Question

if (getnameinfo((sockaddr *) & client, sizeof(client), host, NI_MAXHOST, service, NI_MAXSERV, 0) == 0)
{
    std::cout << host << " Connected on port " << service << std::endl;
}
else
{ 
    inet_ntop(AF_INET, &client.sin_addr, host, NI_MAXHOST);
    std::cout << host << " Connected on port " << ntohs(client.sin_port) << std::endl;
}

I hoped to get "host" connected on port, but instead I get the error:

'inet_ntop' was not declared in this scope

I have tried to add more #include statements, which didn't work. I think I get the error because I maybe have an outdated something?

EDIT : I need to do a minimal reproducible example , but my English is very bad, so it would take me a year to learn/read, so I'm gonna find help another place :-)

Answer 1

Make sure you have #include <ws2tcpip.h> in your code.

But also note that inet_ntop() was added to WinSock in Windows Vista, so make sure that your project is configured to target Vista or later, as ws2tcpip.h declares inet_ntop() only if NTDDI_VERSION >= NTDDI_VISTA (0x06000000) (see Using the Windows Headers and Update WINVER and _WIN32_WINNT ).

If targeting Vista+ at the project/compiler level is not an option (ie, you need to target XP, too), then you can instead import inet_ntop() via GetProcAddress() at runtime.