怎么获得网卡MAC地址

Question

如果是多网卡的电脑，怎么获得正在使用的那个网卡的MAC地址是？？？请大虾指点啊~~~~

Answer 1

http://topic.csdn.net/t/20031009/14/2336961.html

Answer 2

#include "winsock.h" 
#include <stdio.h>
#include <iphlpapi.h>
#pragma comment(lib,"iphlpapi.lib")
void main()
{
    IP_ADAPTER_INFO Interface[20];
    PIP_ADAPTER_INFO NetInterface = NULL;
    DWORD Result = 0;
    unsigned long Length = sizeof(Interface);
    Result = GetAdaptersInfo(Interface, &Length);
    if (Result != NO_ERROR)
    {
        printf("GetAdaptersInfo failed error.\n");
    }
    else
    {
        NetInterface = Interface;
        while (NetInterface)
        {
            static int number;
            number++;
            printf("第%d个网络接口信息:\n", number);
            printf("名称：%s\n", NetInterface->AdapterName);
            printf("信息：%s\n", NetInterface->Description);
            printf("地址：%ld\n", NetInterface->Address);
            printf("MAC地址:%02X:%02X:%02X:%02X:%02X:%02X\n", NetInterface->Address[0], NetInterface->Address[1], NetInterface->Address[2], NetInterface->Address[3], NetInterface->Address[4], NetInterface->Address[5]);
            printf("IP地址：%s\n", NetInterface->IpAddressList.IpAddress.String);
            printf("IP地址掩码:%s\n", NetInterface->IpAddressList.IpMask.String);
            printf("网关:%s\n", NetInterface->GatewayList.IpAddress.String);
            if (NetInterface->DhcpEnabled)
            {
                printf("DHCP配置：\n");
                printf("服务器:%s\n", NetInterface->DhcpServer.IpAddress.String);
                printf("租用:%ld\n", NetInterface->LeaseObtained);
            }
            else
                printf("无DHCP配置\n");
            if (NetInterface->HaveWins)
            {
                printf("Wins配置:\n");
                printf("主Wins服务器:%s\n", NetInterface->PrimaryWinsServer.IpAddress.String);
                printf("次Wins服务器:%s\n", NetInterface->SecondaryWinsServer.IpAddress.String);
            }
            else
                printf("无服务器配置\n");
            NetInterface = NetInterface->Next;
        }
    }
}

Answer 3

再来一个：
#include <winsock2.h>
#include <ws2tcpip.h> 
#include <stdio.h>
#pragma comment(lib,"Ws2_32.lib")
int main()
{
    WSADATA wsaData;
    SOCKET sock;
    INTERFACE_INFO netinterface[10];
    DWORD dwBytesReturned;
    int InterfaceCount;
    int Result;
    Result = WSAStartup(MAKEWORD(2, 1), &wsaData);
    if (Result == SOCKET_ERROR)
    {
        printf("WSAStartup failed with error %d\n", Result);
        return 1;
    }
    //sock = WSASocket(AF_INET, SOCK_DGRAM, 0, 0, 0, 0);
sock = socket(AF_INET, SOCK_DGRAM,  0);
    if (sock == INVALID_SOCKET)
    {
        printf("WSASocket failed with error %d\n\n", WSAGetLastError());
        return 1;
    }
    Result = WSAIoctl(sock, SIO_GET_INTERFACE_LIST, 0, 0, &netinterface, sizeof(netinterface), &dwBytesReturned, 0, 0);
    if (Result == SOCKET_ERROR)
    {
        printf("WSAIoctl failed with error %d \n", WSAGetLastError());
        return 1;
    }
    InterfaceCount = dwBytesReturned / sizeof(INTERFACE_INFO);
    printf("网络接口个数：%d\n", InterfaceCount);
    for (int i = 0; i < InterfaceCount; i++)
    {
        printf("\n第%d个网络接口:\n", i + 1);
        printf("IP地址为：%s\n", inet_ntoa(netinterface[i].iiAddress.AddressIn .sin_addr));
        printf("广播地址为：%s\n", inet_ntoa(netinterface[i].iiBroadcastAddress .AddressIn .sin_addr));
        printf("子网掩码为：%s\n", inet_ntoa(netinterface[i].iiNetmask .AddressIn .sin_addr));
        if (netinterface[i].iiFlags &IFF_POINTTOPOINT)
            printf("Point to Point网络接口\n");
        if (netinterface[i].iiFlags &IFF_LOOPBACK)
            printf("回环接口\n");
        if (netinterface[i].iiFlags &IFF_BROADCAST)
            printf("支持广播\n");
        if (netinterface[i].iiFlags &IFF_MULTICAST)
            printf("支持多播\n");
        if (netinterface[i].iiFlags &IFF_UP)
            printf("接口状态：UP\n");
        else
            printf("接口状态：DOWN\n");
    }
    if (WSACleanup() == SOCKET_ERROR)
    {
        printf("WSACleanup failed with error %d\n", WSAGetLastError());
        return 1;
    }
    return 0;
}

Answer 4

继续：
#include "winsock.h" 
#include <stdio.h>
#pragma comment(lib,"Ws2_32.lib")
void main()
{
    WSADATA wsaData;
    char HostName[255];
    HOSTENT *Hostent;
    int Result;
    Result = WSAStartup(MAKEWORD(2, 1), &wsaData);
    if (Result == SOCKET_ERROR)
    {
        printf("WSAStartup failed with error %d\n", Result);
        return ;
    }
    Result = gethostname(HostName, 255);
    printf("主机名称为：%s\n", HostName);
    if (Result == SOCKET_ERROR)
    {
        printf("gethostname failed with error %d\n", WSAGetLastError());
        return ;
    }
    Hostent = (struct hostent*)malloc(sizeof(struct hostent));
    Hostent = gethostbyname(HostName);    for (int i = 0;; i++)
    {
        if(!Hostent->h_addr_list[i])//rendb add
break;
printf("第%d个网络接口:\n", i + 1);
        printf("IP地址：%s\n", inet_ntoa(*(IN_ADDR*)(Hostent->h_addr_list[i])));
        /*if (Hostent->h_addr_list[i] + Hostent->h_length >= Hostent->h_name)
        {
            break;
        } */ //very bad!!! confused and error oriented
    }
    //WSASocket
i=0;//rendb add
char **ptr=Hostent->h_addr_list;
for(; ptr[i];i++)
{
printf("\n\n 2第%d个网络接口:\n", i );
printf("IP地址：%s\n", inet_ntoa(*(IN_ADDR*)ptr[i]));
}
    if (WSACleanup() == SOCKET_ERROR)
    {
        printf("WSACleanup failed with error %d\n", WSAGetLastError());
        return ;
    }
}

Answer 5

额、、囧。。看错了，是MAC地址、、

Answer 6

在CMD下
nbtstat -an  对方IP   可获取对方机子的登录名和MAC地址在MFC需要下转化一下

Answer 7

所谓“正在使用”是对于某个特定目的主机而言的。比如两个网卡连接两个局域网。
用tracert命令可以知道对方数据从哪个网段来，间接判断。
如果两个网卡在一个局域网...谁知道哪块“正在使用”...