/*
 * IPv4String.h 
 * Copyright (c) 2011 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. 
 */


// SOL9
// 2010/09/01
// 2011/01/18 Fixed bugs on toAddress methods.

#pragma once

#include <sol/Object.h>
#include <sol/Exception.h>

#include <mstcpip.h>

namespace SOL {

/*
typedef struct {
  union {
    struct {
      u_char s_b1,s_b2,s_b3,s_b4;
    } S_un_b;
    struct {
      u_short s_w1,s_w2;
    } S_un_w;
    u_long S_addr;
  } S_un;
} IPAddr;

typedef struct in_addr {
  union {
    struct {
      u_char s_b1,s_b2,s_b3,s_b4;
    } S_un_b;
    struct {
      u_short s_w1,s_w2;
    } S_un_w;
    u_long S_addr;
  } S_un;
} IN_ADDR, *PIN_ADDR, FAR *LPIN_ADDR;

LONG NTAPI RtlIpv4StringToAddress(
  __in   PCTSTR S,
  __in   BOOLEAN Strict,
  __out  LPTSTR *Terminator,
  __out  IN_ADDR *Addr
);

LONG NTAPI RtlIpv4StringToAddressEx(
  __in   PCTSTR AddressString,
  __in   BOOLEAN Strict,
  __out  IN_ADDR *Address,
  __out  PUSHORT Port
);
*/
typedef LONG (NTAPI *_Ipv4StringToAddress)(__in const TCHAR* addressString, __in BOOLEAN strict, __out TCHAR** terminator, __out IN_ADDR *address);
typedef LONG (NTAPI *_Ipv4StringToAddressEx)(__in const TCHAR* addressString, __in BOOLEAN strict, __out IN_ADDR *address, __out USHORT* port);

class IPv4String :public Object {

private:
    // For Ntdll.dll module
    HMODULE  hNtdll;

private:
    //Utility functions to convert a string to IPV4 Address (IN6_ADDR structure)
    _Ipv4StringToAddress   ipv4ToAddress;
    _Ipv4StringToAddressEx ipv4ToAddressEx;

public:
    /**
     * Constructor
     */
    IPv4String()
        :hNtdll(NULL),
        ipv4ToAddress(NULL),
        ipv4ToAddressEx(NULL)
    {
        hNtdll = LoadLibrary(_T("Ntdll.dll"));

        if (hNtdll) {
#ifdef UNICODE
            ipv4ToAddress   = (_Ipv4StringToAddress)GetProcAddress(hNtdll, "RtlIpv4StringToAddressW");
            ipv4ToAddressEx = (_Ipv4StringToAddressEx)GetProcAddress(hNtdll, "RtlIpv4StringToAddressExW");
#else
            ipv4ToAddress   = (_Ipv4StringToAddress)GetProcAddress(hNtdll, "RtlIpv4StringToAddressA");
            ipv4ToAddressEx = (_Ipv4StringToAddressEx)GetProcAddress(hNtdll, "RtlIpv4StringToAddressExA");
#endif
            if (ipv4ToAddress == NULL) {
                throw Exception("Failed to get a procAddress for Ipv4StringToAddressA");
            }
            if (ipv4ToAddressEx == NULL) {
                throw Exception("Failed to get a procAddress for Ipv4StringToAddressExA");
            }

        } else {
            //printf("Failed to get ipV6ToString\n");
            throw Exception("Failed to load Ntdll.dll");
        }
    }

public:
    /**
     * Destructor
     */
    ~IPv4String()
    {
        if (hNtdll) {
            FreeLibrary(hNtdll);
            hNtdll = NULL;
        }
    }

public:
    bool toAddress(__in const TCHAR* addressString, 
            __in BOOLEAN strict, 
            __out TCHAR** terminator, 
            __out IN_ADDR* address)
    {
        bool rc = false;
        //2011/1/18    
        if (ipv4ToAddress) {
            if ((*ipv4ToAddress)(addressString, strict, terminator, address)==NO_ERROR) {
                rc = true;
            }
        }
        return rc;    
    }

public:
    bool toAddressEx(__in const TCHAR* addressString, 
            __in BOOLEAN strict, 
            __out IN_ADDR *address, 
            __out USHORT* port)
    {
        bool rc = false;
        //2011/1/18
        if (ipv4ToAddressEx) {
            if ((*ipv4ToAddressEx)(addressString, strict, address, port)==NO_ERROR) {
                rc = true;
            }
        }
        return rc;    
    }

};

}