获取mac地址

￡神魔★判官ぃ 2022-05-08 09:14 243阅读 0赞

#include <sys/ioctl.h>
    #include <net/if.h>
    #include <unistd.h>
    #include <netinet/in.h>
    #include <string.h>
    #include <stdio.h>
     
    int main(int argc,char *argv[]) {
        struct ifreq ifr;
        struct ifconf ifc;
        char buf[2048];
    
    //生成一个可用套接字描述符 
        int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
        if (sock == -1) {
            printf("socket error\n");
            return -1;
        }
     
    //获取所有网络接口列表
        ifc.ifc_len = sizeof(buf);
        ifc.ifc_buf = buf;
        if (ioctl(sock, SIOCGIFCONF, &ifc) == -1) {
            printf("ioctl error\n");
            return -1;
        }
     
    //对子项进行操作输出
        struct ifreq* it = ifc.ifc_req;
        const struct ifreq* const end = it + (ifc.ifc_len / sizeof(struct ifreq));
        char szMac[64];
        int count = 0;
        for (; it != end; ++it) {
            strcpy(ifr.ifr_name, it->ifr_name);
            if (ioctl(sock, SIOCGIFFLAGS, &ifr) == 0) {
                if (! (ifr.ifr_flags & IFF_LOOPBACK)) { // don't count loopback
                    if (ioctl(sock, SIOCGIFHWADDR, &ifr) == 0) {
                        count ++ ;
                        unsigned char * ptr ;
                        ptr = (unsigned char  *)&ifr.ifr_ifru.ifru_hwaddr.sa_data[0];
                        snprintf(szMac,64,"%02X:%02X:%02X:%02X:%02X:%02X",*ptr,*(ptr+1),*(ptr+2),*(ptr+3),*(ptr+4),*(ptr+5));
                        printf("%d,Interface name : %s , Mac address : %s \n",count,ifr.ifr_name,szMac);
                    }
                }
            }else{
                printf("get mac info error\n");
                return -1;
            }
        }
     
        return 0;
    }

1,Interface name : eth0 , Mac address : A4:29:B7:FF:FF:FF 
    2,Interface name : eth1 , Mac address : A4:29:B7:FF:FF:FF