2 * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
3 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
6 * Copyright 2000, John E. Schimmel, All rights reserved.
7 * This software is not subject to any license of Mirapoint, Inc.
9 * This is free software; you can redistribute and use it
10 * under the same terms as OpenLDAP itself.
13 * Sorry this file is so scary, but it needs to run on a wide range of
14 * platforms. The only exported routine is lutil_uuidstr() which is all
15 * that LDAP cares about. It generates a new uuid and returns it in
21 #include <sys/types.h>
23 #include <ac/stdlib.h>
25 #ifdef HAVE_UUID_TO_STR
26 # include <sys/uuid.h>
27 #elif defined( _WIN32 )
30 # include <ac/socket.h>
33 /* 100 usec intervals from 10/10/1582 to 1/1/1970 */
34 # define UUID_TPLUS 0x01B21DD2138140LL
36 # ifdef HAVE_SYS_SYSCTL_H
38 # include <sys/sysctl.h>
39 # include <net/route.h>
45 /* not needed for Windows */
46 #if !defined(HAVE_UUID_TO_STR) && !defined(_WIN32)
47 static unsigned char *
50 static unsigned char zero[6];
51 static unsigned char eaddr[6];
53 #ifdef HAVE_SYS_SYSCTL_H
56 char *buf, *next, *lim;
57 struct if_msghdr *ifm;
58 struct sockaddr_dl *sdl;
60 if (memcmp(eaddr, zero, sizeof(eaddr))) {
68 mib[4] = NET_RT_IFLIST;
71 if (sysctl(mib, sizeof(mib), NULL, &needed, NULL, 0) < 0) {
76 if( buf == NULL ) return NULL;
78 if (sysctl(mib, sizeof(mib), buf, &needed, NULL, 0) < 0) {
84 for (next = buf; next < lim; next += ifm->ifm_msglen) {
85 ifm = (struct if_msghdr *)next;
86 sdl = (struct sockaddr_dl *)(ifm + 1);
88 if ( sdl->sdl_family != AF_LINK || sdl->sdl_alen == 6 ) {
90 (unsigned char *)sdl->sdl_data + sdl->sdl_nlen,
100 #elif defined (SIOCGIFADDR)
101 char buf[sizeof(struct ifreq) * 32];
105 struct sockaddr_dl *sdl;
109 if (memcmp(eaddr, zero, sizeof(eaddr))) {
113 s = socket( AF_INET, SOCK_DGRAM, 0 );
118 ifc.ifc_len = sizeof( buf );
120 memset( buf, 0, sizeof( buf ) );
122 i = ioctl( s, SIOCGIFCONF, (char *)&ifc );
129 for ( i = 0; i < ifc.ifc_len; ) {
130 ifr = (struct ifreq *)&ifc.ifc_buf[i];
133 if ( sa->sa_len > sizeof( ifr->ifr_addr ) ) {
134 i += sizeof( ifr->ifr_name ) + sa->sa_len;
139 if ( sa->sa_family != AF_LINK ) {
143 sdl = (struct sockaddr_dl *)sa;
145 if ( sdl->sdl_alen == 6 ) {
147 (unsigned char *)sdl->sdl_data + sdl->sdl_nlen,
156 if (memcmp(eaddr, zero, sizeof(eaddr)) == 0) {
157 /* XXX - who knows? */
158 lutil_entropy( eaddr, sizeof(eaddr) );
159 eaddr[0] |= 0x80; /* turn it into a mutlicast address */
168 ** All we really care about is an ISO UUID string. The format of a UUID is:
170 ** time_low 0-3 low field of the timestamp
171 ** time_mid 4-5 middle field of timestamp
172 ** time_hi_and_version 6-7 high field of timestamp and
174 ** clock_seq_hi_and_resv 8 high field of clock sequence
176 ** clock_seq_low 9 low field of clock sequence
177 ** node 10-15 spacially unique identifier
179 ** We use DCE version one, and the DCE variant. Our unique identifier is
180 ** the first ethernet address on the system.
183 lutil_uuidstr( char *buf, size_t len )
185 #ifdef HAVE_UUID_TO_STR
191 uuid_create( &uu, &rc );
192 if ( rc != uuid_s_ok ) {
196 uuid_to_str( &uu, &s, &rc );
197 if ( rc != uuid_s_ok ) {
207 strncpy( buf, s, len );
212 #elif defined( _WIN32 )
214 unsigned char *uuidstr;
217 if( UuidCreate( &uuid ) != RPC_S_OK ) {
221 if( UuidToString( &uuid, &uuidstr ) != RPC_S_OK ) {
225 uuidlen = strlen( uuidstr );
226 if( uuidlen >= len ) {
230 strncpy( buf, uuidstr, len );
231 RpcStringFree( &uuidstr );
237 unsigned long long tl;
239 unsigned short t2, t3, s1;
243 * Theoretically we should delay if seq wraps within 100usec but for now
244 * systems are not fast enough to worry about it.
246 static int inited = 0;
247 static unsigned short seq;
250 lutil_entropy( (unsigned char *) &seq, sizeof(seq) );
254 #ifdef HAVE_GETTIMEOFDAY
255 gettimeofday( &tv, 0 );
261 tl = ( tv.tv_sec * 10000000LL ) + ( tv.tv_usec * 10LL ) + UUID_TPLUS;
264 t1 = tl & 0xffffffff; /* time_low */
265 t2 = ( tl >> 32 ) & 0xffff; /* time_mid */
266 t3 = ( ( tl >> 48 ) & 0x0fff ) | 0x1000; /* time_hi_and_version */
267 s1 = ( ++seq & 0x1fff ) | 0x8000; /* clock_seq_and_reserved */
269 t1 = snprintf( buf, len,
270 "%08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
271 t1, (unsigned) t2, (unsigned) t3, (unsigned) s1,
272 (unsigned) nl[0], (unsigned) nl[1],
273 (unsigned) nl[2], (unsigned) nl[3],
274 (unsigned) nl[4], (unsigned) nl[5] );
276 return (t1 < len) ? t1 : 0;
282 main(int argc, char **argv)
284 char buf1[8], buf2[64];
286 #ifndef HAVE_UUID_TO_STR
287 unsigned char *p = lutil_eaddr();
290 printf( "Ethernet Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
291 (unsigned) p[0], (unsigned) p[1], (unsigned) p[2],
292 (unsigned) p[3], (unsigned) p[4], (unsigned) p[5]);
296 if ( lutil_uuidstr( buf1, sizeof( buf1 ) ) ) {
297 printf( "UUID: %s\n", buf1 );
299 fprintf( stderr, "too short: %ld\n", (long) sizeof( buf1 ) );
302 if ( lutil_uuidstr( buf2, sizeof( buf2 ) ) ) {
303 printf( "UUID: %s\n", buf2 );
305 fprintf( stderr, "too short: %ld\n", (long) sizeof( buf2 ) );
308 if ( lutil_uuidstr( buf2, sizeof( buf2 ) ) ) {
309 printf( "UUID: %s\n", buf2 );
311 fprintf( stderr, "too short: %ld\n", (long) sizeof( buf2 ) );