/*====================================================================*
*
* Copyright (c) 2013 Qualcomm Atheros, Inc.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted (subject to the limitations
* in the disclaimer below) provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* * Neither the name of Qualcomm Atheros nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
* GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
* COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*--------------------------------------------------------------------*/
/*====================================================================*
*
* int gethwaddr (void volatile * memory, char const * device);
*
* ether.h
*
* encode memory with the hardware address of a named host Ethernet
* interface;
*
* there are two ways to obtain the hardware address on Linux; we
* use the first because some systems do not support getifaddrs()
* and some implementations are inconsistent;
*
*
* Contributor(s):
* Nathaniel Houghton <nhoughto@qca.qualcomm.com>
* Charles Maier <cmaier@qca.qualcomm.com>
*
*--------------------------------------------------------------------*/
#ifndef GETHWADDR_SOURCE
#define GETHWADDR_SOURCE
#include <stdint.h>
#include <unistd.h>
#include <memory.h>
#include "../tools/error.h"
#include "../ether/ether.h"
#ifndef OID_802_3_CURRENT_ADDRESS
#define OID_802_3_CURRENT_ADDRESS 0x01010102
#endif
int gethwaddr (void * memory, char const * device)
{
#if defined (__linux__)
# include <ifaddrs.h>
# include <netpacket/packet.h>
# include <sys/ioctl.h>
struct ifreq ifreq;
int fd;
if ((fd = socket (AF_INET, SOCK_DGRAM, 0)) == -1)
{
error (1, errno, "%s: %s", __func__, device);
}
memcpy (ifreq.ifr_name, device, sizeof (ifreq.ifr_name));
if (ioctl (fd, SIOCGIFHWADDR, &ifreq) == -1)
{
close (fd);
return (-1);
}
memcpy (memory, ifreq.ifr_ifru.ifru_hwaddr.sa_data, ETHER_ADDR_LEN);
close (fd);
#elif defined (__linux__)
#include <ifaddrs.h>
#include <net/if_types.h>
struct ifaddrs *ifaddrs;
struct ifaddrs *ifaddr;
if (getifaddrs (&ifaddrs) == -1)
{
error (1, errno, "No interfaces available");
}
for (ifaddr = ifaddrs; ifaddr; ifaddr = ifaddr->ifa_next)
{
if (strcmp (device, ifaddr->ifa_name))
{
continue;
}
if (!ifaddr->ifa_addr)
{
continue;
}
if (ifaddr->ifa_addr->sa_family == AF_PACKET)
{
struct sockaddr_ll * sockaddr = (struct sockaddr_ll *) (ifaddr->ifa_addr);
memcpy (memory, sockaddr->sll_addr, ETHER_ADDR_LEN);
break;
}
}
freeifaddrs (ifaddrs);
#elif defined (__APPLE__)
#include <ifaddrs.h>
#include <net/if_dl.h>
struct ifaddrs *ifaddrs;
struct ifaddrs *ifaddr;
if (getifaddrs (&ifaddrs) == -1)
{
error (1, errno, "No interfaces available");
}
for (ifaddr = ifaddrs; ifaddr; ifaddr = ifaddr->ifa_next)
{
if (strcmp (device, ifaddr->ifa_name))
{
continue;
}
if (!ifaddr->ifa_addr)
{
continue;
}
if (ifaddr->ifa_addr->sa_family == AF_LINK)
{
struct sockaddr_dl * sockaddr = (struct sockaddr_dl *) (ifaddr->ifa_addr);
memcpy (memory, LLADDR (sockaddr), ETHER_ADDR_LEN);
break;
}
}
freeifaddrs (ifaddrs);
#elif defined (__OpenBSD__)
#include <ifaddrs.h>
#include <net/if_dl.h>
struct ifaddrs *ifaddrs;
struct ifaddrs *ifaddr;
if (getifaddrs (&ifaddrs) == -1)
{
error (1, errno, "No interfaces available");
}
for (ifaddr = ifaddrs; ifaddr; ifaddr = ifaddr->ifa_next)
{
if (strcmp (device, ifaddr->ifa_name))
{
continue;
}
if (!ifaddr->ifa_addr)
{
continue;
}
if (ifaddr->ifa_addr->sa_family == AF_LINK)
{
struct sockaddr_dl * sockaddr = (struct sockaddr_dl *) (ifaddr->ifa_addr);
memcpy (memory, LLADDR (sockaddr), ETHER_ADDR_LEN);
break;
}
}
freeifaddrs (ifaddrs);
#elif defined (WINPCAP) || defined (LIBPCAP)
LPADAPTER adapter = PacketOpenAdapter ((PCHAR)(device));
PPACKET_OID_DATA data = (PPACKET_OID_DATA)(malloc (ETHER_ADDR_LEN + sizeof (PACKET_OID_DATA)));
if (!data)
{
error (1, errno, "Can't allocate packet: %s", device);
}
data->Oid = OID_802_3_CURRENT_ADDRESS;
data->Length = ETHER_ADDR_LEN;
if ((adapter == 0) || (adapter->hFile == INVALID_HANDLE_VALUE))
{
error (1, errno, "Can't access interface: %s", device);
}
if (!PacketRequest (adapter, FALSE, data))
{
memset (memory, 0, ETHER_ADDR_LEN);
PacketCloseAdapter (adapter);
free (data);
return (-1);
}
memcpy (memory, data->Data, data->Length);
PacketCloseAdapter (adapter);
free (data);
#else
#error "Unknown environment"
#endif
return (0);
}
#endif