Linux下获取MAC地址

最新推荐文章于 2022-07-28 19:58:08 发布

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#C #Mac

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本文提供了一个使用C语言和系统调用获取本地设备MAC地址的完整示例代码，包括创建套接字、设置接口名称、执行ioctl操作以获取硬件地址，并将地址转换为可读格式。

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

int get_mac(char* mac)
{

    struct ifreq tmp;

    int sock_mac;

    char mac_addr[50] = {0};

    sock_mac = socket(AF_INET, SOCK_STREAM, 0);

    if( sock_mac == -1){

        perror("create socket fail\n");

        return -1;

    }

    memset(&tmp,0,sizeof(tmp));

    strncpy(tmp.ifr_name,"eth0",sizeof(tmp.ifr_name)-1 );

    if( (ioctl( sock_mac, SIOCGIFHWADDR, &tmp)) < 0 ){

        printf("mac ioctl error\n");

        return -1;

    }

    sprintf(mac_addr, "%02x:%02x:%02x:%02x:%02x:%02x",

            (unsigned char)tmp.ifr_hwaddr.sa_data[0],

            (unsigned char)tmp.ifr_hwaddr.sa_data[1],

            (unsigned char)tmp.ifr_hwaddr.sa_data[2],

            (unsigned char)tmp.ifr_hwaddr.sa_data[3],

            (unsigned char)tmp.ifr_hwaddr.sa_data[4],

            (unsigned char)tmp.ifr_hwaddr.sa_data[5]

            );


    close(sock_mac);

    memcpy(mac,mac_addr,strlen(mac_addr));

    return 0;

}