通过当前IP获取当前网卡的MAC地址

// test.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <Windows.h>
#include <IPHlpApi.h>

#pragma comment(lib,"Iphlpapi.lib")
#pragma comment(lib,"Ws2_32.lib")

/*
根据IP地址获取网卡适配器设备名称
OUT AdapterName:适配器名称缓冲区 IN IP:IP地址(网络字节序)
返回值:TRUE 成功获取
*/
BOOL GetAdapterByIp(PCHAR AdapterName, ULONG IP)
{
	ULONG ulAdapterInfoSize = sizeof(IP_ADAPTER_INFO);
	IP_ADAPTER_INFO *pAdapterInfo = (IP_ADAPTER_INFO*)new char[ulAdapterInfoSize];
	IP_ADAPTER_INFO *pAdapterInfoEnum = NULL;

	if( GetAdaptersInfo(pAdapterInfo, &ulAdapterInfoSize) == ERROR_BUFFER_OVERFLOW ){
		// 缓冲区不够大
		delete[] pAdapterInfo;
		pAdapterInfo = (IP_ADAPTER_INFO*)new char[ulAdapterInfoSize];
	}
	
	pAdapterInfoEnum = pAdapterInfo;
	if( GetAdaptersInfo(pAdapterInfoEnum, &ulAdapterInfoSize) == ERROR_SUCCESS ){
		do{		//遍历所有适配器
			if( pAdapterInfoEnum->Type == MIB_IF_TYPE_ETHERNET ){
				// 判断是否为以太网接口
				//pAdapterInfoEnum->Description 是适配器描述
				//pAdapterInfoEnum->AdapterName 是适配器名称
				//pAdapterInfoEnum->Address		是Mac地址
				if ( inet_addr(pAdapterInfoEnum->IpAddressList.IpAddress.String) == IP ){
					printf( "%s IP: %s GATEIP: %s\n ", pAdapterInfoEnum->AdapterName, 
						pAdapterInfoEnum->IpAddressList.IpAddress.String, pAdapterInfoEnum->GatewayList.IpAddress.String );
					printf( "MAC: %02X%02X%02X%02X%02X%02X\n", pAdapterInfoEnum->Address[0],pAdapterInfoEnum->Address[1],
						pAdapterInfoEnum->Address[2],pAdapterInfoEnum->Address[3],pAdapterInfoEnum->Address[4],pAdapterInfoEnum->Address[5]);
					break;
				}
			}
			pAdapterInfoEnum = pAdapterInfoEnum->Next;
		}while(pAdapterInfoEnum);
	}
	delete []pAdapterInfo;
	return FALSE;
}

void test()
{
	char szName[MAX_PATH] = {0};
	int err = gethostname(szName, MAX_PATH);

	if( err==SOCKET_ERROR ) {
		printf("gethostname fail %08x\n", WSAGetLastError());
		return;
	}

	hostent *pHostent = gethostbyname(szName);

	ULONG ulAdapterIp = *(ULONG*)pHostent->h_addr_list[0];

	GetAdapterByIp(NULL,ulAdapterIp);
}


int _tmain(int argc, _TCHAR* argv[])
{
	WSADATA wsaData;
	WSAStartup(MAKEWORD(2,2),&wsaData);
	test();

	system("pause");
	return 0;
}