#inclue "stdafx.h"
#include <windows.h>
#include <stdio.h>

#include "Iphlpapi.h"
#pragma comment(lib, "Iphlpapi.lib")
#pragma comment(lib, "WS2_32.lib")

/////////////////////////////////////////
// 全局数据
u_char    g_ucLocalMac[6];    // 本地MAC地址
DWORD    g_dwGatewayIP;        // 网关IP地址
DWORD    g_dwLocalIP;        // 本地IP地址
DWORD    g_dwMask;            // 子网掩码

BOOL GetGlobalData()
{
    PIP_ADAPTER_INFO pAdapterInfo = NULL;
    ULONG ulLen = 0;

    // 为适配器结构申请内存
    ::GetAdaptersInfo(pAdapterInfo,&ulLen);
    pAdapterInfo = (PIP_ADAPTER_INFO)::GlobalAlloc(GPTR, ulLen);

    // 取得本地适配器结构信息
    if(::GetAdaptersInfo(pAdapterInfo,&ulLen) ==  ERROR_SUCCESS)
    {
        if(pAdapterInfo != NULL)
        {
            memcpy(g_ucLocalMac, pAdapterInfo->Address, 6);
            g_dwGatewayIP = ::inet_addr(pAdapterInfo->GatewayList.IpAddress.String);
            g_dwLocalIP = ::inet_addr(pAdapterInfo->IpAddressList.IpAddress.String);
            g_dwMask = ::inet_addr(pAdapterInfo->IpAddressList.IpMask.String);
        }
    }

    printf(" \n -------------------- 本地主机信息 -----------------------\n\n");
    in_addr in;
    in.S_un.S_addr = g_dwLocalIP;
    printf("      IP Address : %s \n", ::inet_ntoa(in));

    in.S_un.S_addr = g_dwMask;
    printf("     Subnet Mask : %s \n", ::inet_ntoa(in));

    in.S_un.S_addr = g_dwGatewayIP;
    printf(" Default Gateway : %s \n", ::inet_ntoa(in));

    u_char *p = g_ucLocalMac;
    printf("     MAC Address : %02X-%02X-%02X-%02X-%02X-%02X \n", p[0], p[1], p[2], p[3], p[4], p[5]);

    printf(" \n \n ");

    return TRUE;
}

int main()
{
    // 获取全局数据
    GetGlobalData();

    getchar();
    return 0;
}