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/*
Copyright (c) 2004, 2010, Oracle and/or its affiliates
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 */
#define DONT_DEFINE_VOID /* windows includes break if we do */
#include "mysys_priv.h"
#include <m_string.h>
#ifndef MAIN
static my_bool memcpy_and_test(uchar *to, uchar *from, uint len)
{
uint i, res= 1;
for (i= 0; i < len; i++)
if ((*to++= *from++))
res= 0;
return res;
}
#if defined(__APPLE__) || defined(__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;
uchar *buf, *next, *end, *addr;
struct if_msghdr *ifm;
struct sockaddr_dl *sdl;
int res= 1, mib[6]= {CTL_NET, AF_ROUTE, 0, AF_LINK, NET_RT_IFLIST, 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);
addr= (uchar *)LLADDR(sdl);
res= memcpy_and_test(to, addr, ETHER_ADDR_LEN);
}
}
err:
return res;
}
#elif defined(__linux__) || defined(__sun__)
#include <net/if.h>
#include <sys/ioctl.h>
#include <net/if_arp.h>
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#define ETHER_ADDR_LEN 6
my_bool my_gethwaddr(uchar *to)
{
int fd, res= 1;
struct ifreq ifr[32];
struct ifconf ifc;
ifc.ifc_req= ifr;
ifc.ifc_len= sizeof(ifr);
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0)
goto err;
if (ioctl(fd, SIOCGIFCONF, (char*)&ifc) >= 0)
{
uint i;
for (i= 0; res && i < ifc.ifc_len / sizeof(ifr[0]); i++)
{
#ifdef SIOCGIFHWADDR
if (ioctl(fd, SIOCGIFHWADDR, &ifr[i]) >= 0)
res= memcpy_and_test(to, (uchar *)&ifr[i].ifr_hwaddr.sa_data,
ETHER_ADDR_LEN);
#else
/*
A bug in OpenSolaris prevents non-root from getting a mac address:
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=4720634
Thus, we'll use an alternative method and extract the address from the
arp table.
*/
struct arpreq arpr;
arpr.arp_pa= ifr[i].ifr_addr;
if (ioctl(fd, SIOCGARP, (char*)&arpr) >= 0)
res= memcpy_and_test(to, (uchar *)&arpr.arp_ha.sa_data,
ETHER_ADDR_LEN);
#endif
}
}
close(fd);
err:
return res;
}
#elif defined(_WIN32)
#include <winsock2.h>
#include <iphlpapi.h>
#define ETHER_ADDR_LEN 6
my_bool my_gethwaddr(uchar *to)
{
my_bool res= 1;
IP_ADAPTER_INFO *info= NULL;
ULONG info_len= 0;
if (GetAdaptersInfo(info, &info_len) != ERROR_BUFFER_OVERFLOW)
goto err;
info= alloca(info_len);
if (GetAdaptersInfo(info, &info_len) != NO_ERROR)
goto err;
while (info && res)
{
if (info->Type == MIB_IF_TYPE_ETHERNET &&
info->AddressLength == ETHER_ADDR_LEN)
{
res= memcpy_and_test(to, info->Address, ETHER_ADDR_LEN);
}
info = info->Next;
}
err:
return res;
}
#else /* neither FreeBSD nor linux not Windows */
/* 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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