Linux 获得机器的IP和网卡信息(4)

if ((ioctl (mi->fd, SIOCGARP, (char *) & mi->arp))) {
                err->errcode = errno;
                snprintf (err->errmsg, GETMAC_MAX_MSGLEN, "ioctl(SIOCGARP) error (%d): %s", strerror(errno)); 
                return GETMAC_ERROR;
            } else {
                sprintf (value, "%02x:%02x:%02x:%02x:%02x:%02x",
                    (unsigned char) mi->arp.arp_ha.sa_data[0],
                    (unsigned char) mi->arp.arp_ha.sa_data[1],
                    (unsigned char) mi->arp.arp_ha.sa_data[2],
                    (unsigned char) mi->arp.arp_ha.sa_data[3],
                    (unsigned char) mi->arp.arp_ha.sa_data[4],
                    (unsigned char) mi->arp.arp_ha.sa_data[5] );
            }
        } while (0);
#else
    #if 0
        do {
            sprintf("%02x:%02x:%02x:%02x:%02x:%02x",
                (unsigned char) mi->buf[i].ifr_enaddr[0],
                (unsigned char) mi->buf[i].ifr_enaddr[1],
                (unsigned char) mi->buf[i].ifr_enaddr[2],
                (unsigned char) mi->buf[i].ifr_enaddr[3],
                (unsigned char) mi->buf[i].ifr_enaddr[4],
                (unsigned char) mi->buf[i].ifr_enaddr[5]);
        } while (0);
    #else
        do {
            sprintf (value, "%02x:%02x:%02x:%02x:%02x:%02x",
                (unsigned char) mi->buf[i].ifr_hwaddr.sa_data[0],
                (unsigned char) mi->buf[i].ifr_hwaddr.sa_data[1],
                (unsigned char) mi->buf[i].ifr_hwaddr.sa_data[2],
                (unsigned char) mi->buf[i].ifr_hwaddr.sa_data[3],
                (unsigned char) mi->buf[i].ifr_hwaddr.sa_data[4],
                (unsigned char) mi->buf[i].ifr_hwaddr.sa_data[5]);
        } while (0);
    #endif
#endif
        snprintf (err->errmsg, GETMAC_MAX_MSGLEN, "MAC address");
        break;

default:
        err->errcode = GETMAC_EATTR;
        snprintf (err->errmsg, GETMAC_MAX_MSGLEN, "error attr specified");
        return GETMAC_EATTR;
    }

return GETMAC_SUCCESS;
}


void getmac_fini (getmac_info_t * mi)
{
    if (mi->fd != -1) {
        close (mi->fd);
        mi->fd = -1;
    }
}

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