ossp-pkg/uuid/uuid_mac.c
1.14
/*
** OSSP uuid - Universally Unique Identifier
** Copyright (c) 2004-2008 Ralf S. Engelschall <rse@engelschall.com>
** Copyright (c) 2004-2008 The OSSP Project <http://www.ossp.org/>
**
** This file is part of OSSP uuid, a library for the generation
** of UUIDs which can found at http://www.ossp.org/pkg/lib/uuid/
**
** Permission to use, copy, modify, and distribute this software for
** any purpose with or without fee is hereby granted, provided that
** the above copyright notice and this permission notice appear in all
** copies.
**
** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
** 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.
**
** uuid_mac.c: Media Access Control (MAC) resolver implementation
*/
/* own headers (part (1/2) */
#include "uuid_ac.h"
/* system headers */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_NET_IF_DL_H
#include <net/if_dl.h>
#endif
#ifdef HAVE_NET_IF_ARP_H
#include <net/if_arp.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_IFADDRS_H
#include <ifaddrs.h>
#endif
/* own headers (part (1/2) */
#include "uuid_mac.h"
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE (/*lint -save -e506*/ !FALSE /*lint -restore*/)
#endif
/* return the Media Access Control (MAC) address of
the FIRST network interface card (NIC) */
int mac_address(unsigned char *data_ptr, size_t data_len)
{
/* sanity check arguments */
if (data_ptr == NULL || data_len < MAC_LEN)
return FALSE;
#if defined(HAVE_IFADDRS_H) && defined(HAVE_NET_IF_DL_H) && defined(HAVE_GETIFADDRS)
/* use getifaddrs(3) on BSD class platforms (xxxBSD, MacOS X, etc) */
{
struct ifaddrs *ifap;
struct ifaddrs *ifap_head;
const struct sockaddr_dl *sdl;
unsigned char *ucp;
int i;
if (getifaddrs(&ifap_head) < 0)
return FALSE;
for (ifap = ifap_head; ifap != NULL; ifap = ifap->ifa_next) {
if (ifap->ifa_addr != NULL && ifap->ifa_addr->sa_family == AF_LINK) {
sdl = (const struct sockaddr_dl *)(void *)ifap->ifa_addr;
ucp = (unsigned char *)(sdl->sdl_data + sdl->sdl_nlen);
if (sdl->sdl_alen > 0) {
for (i = 0; i < MAC_LEN && i < sdl->sdl_alen; i++, ucp++)
data_ptr[i] = (unsigned char)(*ucp & 0xff);
freeifaddrs(ifap_head);
return TRUE;
}
}
}
freeifaddrs(ifap_head);
}
#endif
#if defined(HAVE_NET_IF_H) && defined(SIOCGIFHWADDR)
/* use SIOCGIFHWADDR ioctl(2) on Linux class platforms */
{
struct ifreq ifr;
struct sockaddr *sa;
int s;
int i;
if ((s = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
return FALSE;
sprintf(ifr.ifr_name, "eth0");
if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
close(s);
return FALSE;
}
sa = (struct sockaddr *)&ifr.ifr_addr;
for (i = 0; i < MAC_LEN; i++)
data_ptr[i] = (unsigned char)(sa->sa_data[i] & 0xff);
close(s);
return TRUE;
}
#endif
#if defined(SIOCGARP)
/* use SIOCGARP ioctl(2) on SVR4 class platforms (Solaris, etc) */
{
char hostname[MAXHOSTNAMELEN];
struct hostent *he;
struct arpreq ar;
struct sockaddr_in *sa;
int s;
int i;
if (gethostname(hostname, sizeof(hostname)) < 0)
return FALSE;
if ((he = gethostbyname(hostname)) == NULL)
return FALSE;
if ((s = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
return FALSE;
memset(&ar, 0, sizeof(ar));
sa = (struct sockaddr_in *)((void *)&(ar.arp_pa));
sa->sin_family = AF_INET;
memcpy(&(sa->sin_addr), *(he->h_addr_list), sizeof(struct in_addr));
if (ioctl(s, SIOCGARP, &ar) < 0) {
close(s);
return FALSE;
}
close(s);
if (!(ar.arp_flags & ATF_COM))
return FALSE;
for (i = 0; i < MAC_LEN; i++)
data_ptr[i] = (unsigned char)(ar.arp_ha.sa_data[i] & 0xff);
return TRUE;
}
#endif
return FALSE;
}
