1 /*
2 ** OSSP uuid - Universally Unique Identifier
3 ** Copyright (c) 2004-2008 Ralf S. Engelschall <rse@engelschall.com>
4 ** Copyright (c) 2004-2008 The OSSP Project <http://www.ossp.org/>
5 **
6 ** This file is part of OSSP uuid, a library for the generation
7 ** of UUIDs which can found at http://www.ossp.org/pkg/lib/uuid/
8 **
9 ** Permission to use, copy, modify, and distribute this software for
10 ** any purpose with or without fee is hereby granted, provided that
11 ** the above copyright notice and this permission notice appear in all
12 ** copies.
13 **
14 ** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
15 ** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
16 ** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 ** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
18 ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
21 ** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
22 ** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 ** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
24 ** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 ** SUCH DAMAGE.
26 **
27 ** uuid_mac.c: Media Access Control (MAC) resolver implementation
28 */
29
30 /* own headers (part (1/2) */
31 #include "uuid_ac.h"
32
33 /* system headers */
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38 #include <fcntl.h>
39 #include <time.h>
40 #ifdef HAVE_SYS_TIME_H
41 #include <sys/time.h>
42 #endif
43 #ifdef HAVE_SYS_TYPES_H
44 #include <sys/types.h>
45 #endif
46 #ifdef HAVE_SYS_PARAM_H
47 #include <sys/param.h>
48 #endif
49 #ifdef HAVE_SYS_IOCTL_H
50 #include <sys/ioctl.h>
51 #endif
52 #ifdef HAVE_SYS_SOCKET_H
53 #include <sys/socket.h>
54 #endif
55 #ifdef HAVE_SYS_SOCKIO_H
56 #include <sys/sockio.h>
57 #endif
58 #ifdef HAVE_NETDB_H
59 #include <netdb.h>
60 #endif
61 #ifdef HAVE_NET_IF_H
62 #include <net/if.h>
63 #endif
64 #ifdef HAVE_NET_IF_DL_H
65 #include <net/if_dl.h>
66 #endif
67 #ifdef HAVE_NET_IF_ARP_H
68 #include <net/if_arp.h>
69 #endif
70 #ifdef HAVE_NETINET_IN_H
71 #include <netinet/in.h>
72 #endif
73 #ifdef HAVE_ARPA_INET_H
74 #include <arpa/inet.h>
75 #endif
76 #ifdef HAVE_IFADDRS_H
77 #include <ifaddrs.h>
78 #endif
79
80 /* own headers (part (1/2) */
81 #include "uuid_mac.h"
82
83 #ifndef FALSE
84 #define FALSE 0
85 #endif
86 #ifndef TRUE
87 #define TRUE (/*lint -save -e506*/ !FALSE /*lint -restore*/)
88 #endif
89
90 /* return the Media Access Control (MAC) address of
91 the FIRST network interface card (NIC) */
mac_address(unsigned char * data_ptr,size_t data_len)92 int mac_address(unsigned char *data_ptr, size_t data_len)
93 {
94 /* sanity check arguments */
95 if (data_ptr == NULL || data_len < MAC_LEN)
96 return FALSE;
97
98 #if defined(HAVE_IFADDRS_H) && defined(HAVE_NET_IF_DL_H) && defined(HAVE_GETIFADDRS)
99 /* use getifaddrs(3) on BSD class platforms (xxxBSD, MacOS X, etc) */
100 {
101 struct ifaddrs *ifap;
102 struct ifaddrs *ifap_head;
103 const struct sockaddr_dl *sdl;
104 unsigned char *ucp;
105 int i;
106
107 if (getifaddrs(&ifap_head) < 0)
108 return FALSE;
109 for (ifap = ifap_head; ifap != NULL; ifap = ifap->ifa_next) {
110 if (ifap->ifa_addr != NULL && ifap->ifa_addr->sa_family == AF_LINK) {
111 sdl = (const struct sockaddr_dl *)(void *)ifap->ifa_addr;
112 ucp = (unsigned char *)(sdl->sdl_data + sdl->sdl_nlen);
113 if (sdl->sdl_alen > 0) {
114 for (i = 0; i < MAC_LEN && i < sdl->sdl_alen; i++, ucp++)
115 data_ptr[i] = (unsigned char)(*ucp & 0xff);
116 freeifaddrs(ifap_head);
117 return TRUE;
118 }
119 }
120 }
121 freeifaddrs(ifap_head);
122 }
123 #endif
124
125 #if defined(HAVE_NET_IF_H) && defined(SIOCGIFHWADDR)
126 /* use SIOCGIFHWADDR ioctl(2) on Linux class platforms */
127 {
128 struct ifreq ifr;
129 struct sockaddr *sa;
130 int s;
131 int i;
132
133 if ((s = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
134 return FALSE;
135 sprintf(ifr.ifr_name, "eth0");
136 if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
137 close(s);
138 return FALSE;
139 }
140 sa = (struct sockaddr *)&ifr.ifr_addr;
141 for (i = 0; i < MAC_LEN; i++)
142 data_ptr[i] = (unsigned char)(sa->sa_data[i] & 0xff);
143 close(s);
144 return TRUE;
145 }
146 #endif
147
148 #if defined(SIOCGARP)
149 /* use SIOCGARP ioctl(2) on SVR4 class platforms (Solaris, etc) */
150 {
151 char hostname[MAXHOSTNAMELEN];
152 struct hostent *he;
153 struct arpreq ar;
154 struct sockaddr_in *sa;
155 int s;
156 int i;
157
158 if (gethostname(hostname, sizeof(hostname)) < 0)
159 return FALSE;
160 if ((he = gethostbyname(hostname)) == NULL)
161 return FALSE;
162 if ((s = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
163 return FALSE;
164 memset(&ar, 0, sizeof(ar));
165 sa = (struct sockaddr_in *)((void *)&(ar.arp_pa));
166 sa->sin_family = AF_INET;
167 memcpy(&(sa->sin_addr), *(he->h_addr_list), sizeof(struct in_addr));
168 if (ioctl(s, SIOCGARP, &ar) < 0) {
169 close(s);
170 return FALSE;
171 }
172 close(s);
173 if (!(ar.arp_flags & ATF_COM))
174 return FALSE;
175 for (i = 0; i < MAC_LEN; i++)
176 data_ptr[i] = (unsigned char)(ar.arp_ha.sa_data[i] & 0xff);
177 return TRUE;
178 }
179 #endif
180
181 return FALSE;
182 }
183
184