GetAdaptersInfo获取本机信息

#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;
}