localhostinfo.cpp

WinSocket各种阻塞非阻塞模式的简单例子都已通过调试适合网络编程初学者

#include <windows.h>
#include <stdio.h>
#include "Iphlpapi.h"

#pragma comment(lib, "WS2_32.lib")
#pragma comment(lib, "IPHLPAPI.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;   //指向一个缓冲区，用来取得IP_ADAPTER_INFO结构的列表
	ULONG ulLen = 0;	//用来指定上面缓冲区的大小。如果大小不够，此参数返回所需大小
	
	//为适配器结构申请内存
	::GetAdaptersInfo(pAdapterInfo, &ulLen);
	pAdapterInfo = (PIP_ADAPTER_INFO)::GlobalAlloc(GPTR, ulLen);

	//获取本地适配器结构信息 成功返回ERROR_SUCCESS
	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("------------- 本地主机信息 ---------------\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("   IP Address:%s\n",inet_ntoa(in));

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

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

	return TRUE;
}

int main()
{
	// 获取全局数据
	GetGlobalData();
	
	getchar();
	return 0;
}