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/* Copyright (C) 2004 MySQL AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
#if defined(__FreeBSD__) || defined(__linux__)
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;
}
#endif /* FreeBSD || linux */
#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;
uchar *buf, *next, *end, *addr;
struct if_msghdr *ifm;
struct sockaddr_dl *sdl;
int i, 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=LLADDR(sdl);
res=memcpy_and_test(to, addr, ETHER_ADDR_LEN);
}
}
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;
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)
res=memcpy_and_test(to, (uchar *)&ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
} while (res && (errno == 0 || errno == ENODEV) && ifr.ifr_name[3]++ < '6');
close(fd);
err:
return res;
}
#elif defined(__WIN__)
/* Workaround for BUG#32082 (Definition of VOID in my_global.h conflicts with
windows headers) */
#ifdef VOID
#undef VOID
#define VOID void
#endif
#include <iphlpapi.h>
/*
The following typedef is for dynamically loading
iphlpapi.dll / GetAdaptersAddresses. Dynamic loading is
used because GetAdaptersAddresses is not available on Windows 2000
which MySQL still supports. Static linking would cause an unresolved export.
*/
typedef DWORD (WINAPI *pfnGetAdaptersAddresses)(IN ULONG Family,
IN DWORD Flags,IN PVOID Reserved,
OUT PIP_ADAPTER_ADDRESSES pAdapterAddresses,
IN OUT PULONG pOutBufLen);
/*
my_gethwaddr - Windows version
@brief Retrieve MAC address from network hardware
@param[out] to MAC address exactly six bytes
@return Operation status
@retval 0 OK
@retval <>0 FAILED
*/
my_bool my_gethwaddr(uchar *to)
{
PIP_ADAPTER_ADDRESSES pAdapterAddresses;
PIP_ADAPTER_ADDRESSES pCurrAddresses;
IP_ADAPTER_ADDRESSES adapterAddresses;
ULONG address_len;
my_bool return_val= 1;
static pfnGetAdaptersAddresses fnGetAdaptersAddresses=
(pfnGetAdaptersAddresses)-1;
if(fnGetAdaptersAddresses == (pfnGetAdaptersAddresses)-1)
{
/* Get the function from the DLL */
fnGetAdaptersAddresses= (pfnGetAdaptersAddresses)
GetProcAddress(LoadLibrary("iphlpapi.dll"),
"GetAdaptersAddresses");
}
if (!fnGetAdaptersAddresses)
return 1; /* failed to get function */
address_len= sizeof (IP_ADAPTER_ADDRESSES);
/* Get the required size for the address data. */
if (fnGetAdaptersAddresses(AF_UNSPEC, 0, 0, &adapterAddresses, &address_len)
== ERROR_BUFFER_OVERFLOW)
{
pAdapterAddresses= my_malloc(address_len, 0);
if (!pAdapterAddresses)
return 1; /* error, alloc failed */
}
else
pAdapterAddresses= &adapterAddresses; /* one is enough don't alloc */
/* Get the hardware info. */
if (fnGetAdaptersAddresses(AF_UNSPEC, 0, 0, pAdapterAddresses, &address_len)
== NO_ERROR)
{
pCurrAddresses= pAdapterAddresses;
while (pCurrAddresses)
{
/* Look for ethernet cards. */
if (pCurrAddresses->IfType == IF_TYPE_ETHERNET_CSMACD)
{
/* check for a good address */
if (pCurrAddresses->PhysicalAddressLength < 6)
continue; /* bad address */
/* save 6 bytes of the address in the 'to' parameter */
memcpy(to, pCurrAddresses->PhysicalAddress, 6);
/* Network card found, we're done. */
return_val= 0;
break;
}
pCurrAddresses= pCurrAddresses->Next;
}
}
/* Clean up memory allocation. */
if (pAdapterAddresses != &adapterAddresses)
my_free(pAdapterAddresses, 0);
return return_val;
}
#else /* __FreeBSD__ || __linux__ || __WIN__ */
/* 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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