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/*
Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* get hardware address for an interface */
/* if there are many available, any non-zero one can be used */
#include "mysys_priv.h"
#include <m_string.h>
#ifndef MAIN
#ifdef __FreeBSD__
#include <net/ethernet.h>
#include <sys/sysctl.h>
#include <net/route.h>
#include <net/if.h>
#include <net/if_dl.h>
my_bool my_gethwaddr(uchar *to)
{
size_t len;
char *buf, *next, *end;
struct if_msghdr *ifm;
struct sockaddr_dl *sdl;
int res=1, mib[6]={CTL_NET, AF_ROUTE, 0, AF_LINK, NET_RT_IFLIST, 0};
char zero_array[ETHER_ADDR_LEN] = {0};
if (sysctl(mib, 6, NULL, &len, NULL, 0) == -1)
goto err;
if (!(buf = alloca(len)))
goto err;
if (sysctl(mib, 6, buf, &len, NULL, 0) < 0)
goto err;
end = buf + len;
for (next = buf ; res && next < end ; next += ifm->ifm_msglen)
{
ifm = (struct if_msghdr *)next;
if (ifm->ifm_type == RTM_IFINFO)
{
sdl= (struct sockaddr_dl *)(ifm + 1);
memcpy(to, LLADDR(sdl), ETHER_ADDR_LEN);
res= memcmp(to, zero_array, ETHER_ADDR_LEN) ? 0 : 1;
}
}
err:
return res;
}
#elif __linux__
#include <net/if.h>
#include <sys/ioctl.h>
#include <net/ethernet.h>
my_bool my_gethwaddr(uchar *to)
{
int fd, res= 1;
struct ifreq ifr;
char zero_array[ETHER_ADDR_LEN] = {0};
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0)
goto err;
bzero(&ifr, sizeof(ifr));
strnmov(ifr.ifr_name, "eth0", sizeof(ifr.ifr_name) - 1);
do
{
if (ioctl(fd, SIOCGIFHWADDR, &ifr) >= 0)
{
memcpy(to, &ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
res= memcmp(to, zero_array, ETHER_ADDR_LEN) ? 0 : 1;
}
} while (res && (errno == 0 || errno == ENODEV) && ifr.ifr_name[3]++ < '6');
close(fd);
err:
return res;
}
#else /* FreeBSD elif linux */
/* just fail */
my_bool my_gethwaddr(uchar *to __attribute__((unused)))
{
return 1;
}
#endif
#else /* MAIN */
int main(int argc __attribute__((unused)),char **argv)
{
uchar mac[6];
uint i;
MY_INIT(argv[0]);
if (my_gethwaddr(mac))
{
printf("my_gethwaddr failed with errno %d\n", errno);
exit(1);
}
for (i=0; i < sizeof(mac); i++)
{
if (i) printf(":");
printf("%02x", mac[i]);
}
printf("\n");
return 0;
}
#endif
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