C++实现获取本机MAC地址与IP地址

//获取MAC地址
std::string OnGetLocalMac()
{
	string*   pstrMacs;
	std::string strMac;
	int nMacCount;
	PIP_ADAPTER_INFO pAdapterInfo;  
	PIP_ADAPTER_INFO pAdapterInfo1 = NULL; 
	DWORD AdapterInfoSize;  
	char szMac[33]   =   {0}; 
	DWORD Err;    
	AdapterInfoSize = 0;  
	Err = GetAdaptersInfo(NULL, &AdapterInfoSize);  
	if((Err   !=   0)   &&   (Err   !=   ERROR_BUFFER_OVERFLOW))
	{
		goto err;
	}  
	//   分配网卡信息内存  
	pAdapterInfo = (PIP_ADAPTER_INFO)GlobalAlloc(GPTR, AdapterInfoSize);  
	if(pAdapterInfo == NULL)
	{
		goto err;
	}    
	if(GetAdaptersInfo(pAdapterInfo, &AdapterInfoSize) != 0)
	{  
		GlobalFree(pAdapterInfo);
		goto err;
	}   
	pAdapterInfo1 = pAdapterInfo;
	nMacCount = 0;
	while(pAdapterInfo1)
	{
		nMacCount++;
		pAdapterInfo1= pAdapterInfo1->Next;
	}
	if(nMacCount <= 0)
	{
		GlobalFree(pAdapterInfo);
		goto err;
	}
	pstrMacs = new string[nMacCount];
	pAdapterInfo1 = pAdapterInfo;
	for (int i = 0; i < nMacCount; i++)
	{
		memset(szMac, 0, sizeof(szMac));
		sprintf_s(szMac, 
			32, 
			"%02X:%02X:%02X:%02X:%02X:%02X",
			pAdapterInfo1->Address[0],  
			pAdapterInfo1->Address[1],  
			pAdapterInfo1->Address[2],  
			pAdapterInfo1->Address[3],  
			pAdapterInfo1->Address[4],  
			pAdapterInfo1->Address[5]);
		_strupr_s(szMac,32);
		pstrMacs[i] = szMac;
		pAdapterInfo1 = pAdapterInfo1->Next;
	}
	GlobalFree(pAdapterInfo); 

err:
	//这里只取第一个地址，多个MAC地址是无法确认使用的哪个
	strMac = pstrMacs[0];
	return strMac ;
}

//获取IP地址
#pragma comment(lib, "WS2_32.lib")
std::string OnGetLocalIP()
{

	long lRet = 0;
	char szHostName[256] = {0};
	long lHostNameLen = 256;
	int nRet = 0;
	hostent *phost = NULL;
	std::string strHostIp = "";

//这种方式获取不到，改用下面的方式
	//for(int i=0;phost!=NULL&&phost->h_addr_list[i]!=NULL;i++)  
	//{  
	//	char* pszHostIP=inet_ntoa(*(struct in_addr*)phost->h_addr_list[i]);  
	//	strHostIp=pszHostIP;  
	//}
	//通过下面的gethostname获取
	WSADATA WSAData;
	if (!WSAStartup(MAKEWORD(2, 0),&WSAData))
	{  
		if(!gethostname(szHostName,sizeof(szHostName)))
		{
			hostent *host=gethostbyname(szHostName);
			if(host!=NULL)
			{
				char* pszHostIP =  inet_ntoa(*(struct in_addr*)*host->h_addr_list);
				strHostIp = pszHostIP;

			}
		}
	}
	return strHostIp;
	
}

//需要添加头文件
#include <QNetworkInterface>
QString GetMac()
{
    QString strMacAddr = "";
    QList<QNetworkInterface> ifaces = QNetworkInterface::allInterfaces();//获取所有网卡信息
    for (int i = 0; i < ifaces.count(); i++)
    {
        QNetworkInterface iface = ifaces.at(i);
        if ( iface.flags().testFlag(QNetworkInterface::IsUp) && iface.flags().testFlag(QNetworkInterface::IsRunning) && !iface.flags().testFlag(QNetworkInterface::IsLoopBack))
        {
            for (int j=0; j<iface.addressEntries().count(); j++)
            {
                strMacAddr = iface.hardwareAddress();
                i = ifaces.count(); //跳出外层循环
                break;
            }
        }
    }

    return strMacAddr;
}

QString GetIP()
{
    QString strIPAddr = "";
    foreach (QHostAddress ptr , QNetworkInterface::allAddresses())
    {
        if(ptr.protocol() == QAbstractSocket::IPv4Protocol){// 获取ipv4地址
            if(!ptr.isLoopback()){  // 过滤本地回环127.0.0.1
                strIPAddr = ptr.toString();
                break;
            }
        }
    }
    return strIPAddr;
}