linux C获得mac

最新推荐文章于 2024-04-12 17:10:39 发布

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最新推荐文章于 2024-04-12 17:10:39 发布

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分类专栏：嵌入式开发

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本文介绍了一个简单的C程序，该程序使用socket编程和ioctl系统调用来获取指定网卡的硬件MAC地址。通过传递网卡名称作为参数，程序将打印出对应的MAC地址。

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#include   stdio.h
#include   sys/ioctl.h
#include   sys/socket.h
#include   netinet/in.h
#include   net/if.h>
#include   string.h

int man(int argc, char *argv[])
{

struct ifreq ifreq;
int sock;

    if(argc!=2)
    {
        printf( "Usage   :   ethname\n ");
        return   1;
    }
    if((sock=socket(AF_INET,SOCK_STREAM,0)) <0)
    {
        perror( "socket ");
        return   2;
    }
    strcpy(ifreq.ifr_name,argv[1]);
    if(ioctl(sock,SIOCGIFHWADDR,&ifreq) <0)
    {
        perror( "ioctl ");
        return   3;
    }
    printf( "x:x:x:x:x:x\n ",
            (unsigned   char)ifreq.ifr_hwaddr.sa_data[0],
            (unsigned   char)ifreq.ifr_hwaddr.sa_data[1],
            (unsigned   char)ifreq.ifr_hwaddr.sa_data[2],
            (unsigned   char)ifreq.ifr_hwaddr.sa_data[3],
            (unsigned   char)ifreq.ifr_hwaddr.sa_data[4],
            (unsigned   char)ifreq.ifr_hwaddr.sa_data[5]);
    return   0;
}