Can't read InetPton identifier in Detour creatwth.cpp

[ali919]

I have included the header file <Ws2tcpip.h> inside the creatwth.cpp and linked Ws2_32 library using #pragma comment(lib, "Ws2_32.lib")
However, when I call the function "InetPton", it's giving me the error " 'InetPton': identifier not found".

Can someone help me please !

[bgianfo]

If you look at ws2tcpip.h you'll see InetPton is guarded by an ifdef:

#if (NTDDI_VERSION >= NTDDI_VISTA)
WINSOCK_API_LINKAGE
INT
WSAAPI
inet_pton(
    _In_                                      INT             Family,
    _In_                                      PCSTR           pszAddrString,
    _When_(Family == AF_INET, _Out_writes_bytes_(sizeof(IN_ADDR)))
    _When_(Family == AF_INET6, _Out_writes_bytes_(sizeof(IN6_ADDR)))
                                              PVOID           pAddrBuf
    );

INT
WSAAPI
InetPtonW(
    _In_                                      INT             Family,
    _In_                                      PCWSTR          pszAddrString,
    _When_(Family == AF_INET, _Out_writes_bytes_(sizeof(IN_ADDR)))
    _When_(Family == AF_INET6, _Out_writes_bytes_(sizeof(IN6_ADDR)))
                                              PVOID           pAddrBuf
    );

PCSTR
WSAAPI
inet_ntop(
    _In_                                INT             Family,
    _In_                                const VOID *    pAddr,
    _Out_writes_(StringBufSize)         PSTR            pStringBuf,
    _In_                                size_t          StringBufSize
    );

PCWSTR
WSAAPI
InetNtopW(
    _In_                                INT             Family,
    _In_                                const VOID *    pAddr,
    _Out_writes_(StringBufSize)         PWSTR           pStringBuf,
    _In_                                size_t          StringBufSize
    );

#define InetPtonA       inet_pton
#define InetNtopA       inet_ntop 

#ifdef UNICODE
#define InetPton        InetPtonW
#define InetNtop        InetNtopW
#else
#define InetPton        InetPtonA
#define InetNtop        InetNtopA
#endif

You can see that we are probably compiling with a _WIN32_WINNT value lower than the value that targets Vista,
causing these definitions not to be included in the headers.

For example Detours sets _WIN32_WINNT to 0x501 (NTDDI_WINXP) or lower in some samples, which is probably what you are hitting. Adjust the value for the sample you are using and it should work.

[bgianfo]

Closing this issue out, feel free to re-open if you have follow up questions.
Thanks!