source: freewrt/package/wiviz/src/wl_access.c@ 6fc4520e

/*
This file is part of Wi-viz (http://wiviz.natetrue.com).

Wi-viz is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License v2 as published by
the Free Software Foundation.

Wi-viz is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Wi-viz; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <net/if.h>

#include "wl_access.h"

int wl_ioctl(char *name, int cmd, void *buf, int len)
{
        struct ifreq ifr;
        wl_ioctl_t ioc;
        int ret = 0;
        int s;

        /* open socket to kernel */
        if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
                perror("socket");
                return errno;
        }

        /* do it */
        ioc.cmd = cmd;
        ioc.buf = buf;
        ioc.len = len;
        strncpy(ifr.ifr_name, name, IFNAMSIZ);
        ifr.ifr_data = (caddr_t) &ioc;
        ret = ioctl(s, SIOCDEVPRIVATE, &ifr);

        /* cleanup */
        close(s);
        return ret;
}

int get_mac(char *name, void *buf)
{
        struct ifreq ifr;
        int ret = 0;
        int s;

        /* open socket to kernel */
        if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
                perror("socket");
                return errno;
        }

        strncpy(ifr.ifr_name, name, IFNAMSIZ);
        //ifr.ifr_data = (caddr_t) buf;
        if ((ret = ioctl(s, SIOCGIFHWADDR, &ifr)) < 0)
                        perror(ifr.ifr_name);

        /* cleanup */
        close(s);
        memcpy(buf, &ifr.ifr_hwaddr.sa_data, 6);
        return ret;
}