mirror of
https://git.openldap.org/openldap/openldap.git
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317 lines
6.4 KiB
C
317 lines
6.4 KiB
C
/*
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* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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/* Portions
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* Copyright 2000, John E. Schimmel, All rights reserved.
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* This software is not subject to any license of Mirapoint, Inc.
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*
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* This is free software; you can redistribute and use it
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* under the same terms as OpenLDAP itself.
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*/
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/*
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* Sorry this file is so scary, but it needs to run on a wide range of
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* platforms. The only exported routine is lutil_uuidstr() which is all
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* that LDAP cares about. It generates a new uuid and returns it in
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* in string form.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <sys/types.h>
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#include <ac/stdlib.h>
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#ifdef HAVE_UUID_TO_STR
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# include <sys/uuid.h>
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#elif defined( _WIN32 )
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# include <rpc.h>
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#else
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# include <ac/socket.h>
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# include <ac/time.h>
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/* 100 usec intervals from 10/10/1582 to 1/1/1970 */
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# define UUID_TPLUS 0x01B21DD2138140LL
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# ifdef HAVE_SYS_SYSCTL_H
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# include <net/if.h>
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# include <sys/sysctl.h>
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# include <net/route.h>
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# endif
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#endif
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#include <lutil.h>
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/* not needed for Windows */
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#if !defined(HAVE_UUID_TO_STR) && !defined(_WIN32)
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static unsigned char *
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lutil_eaddr( void )
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{
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static unsigned char zero[6];
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static unsigned char eaddr[6];
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#ifdef HAVE_SYS_SYSCTL_H
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size_t needed;
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int mib[6];
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char *buf, *next, *lim;
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struct if_msghdr *ifm;
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struct sockaddr_dl *sdl;
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if (memcmp(eaddr, zero, sizeof(eaddr))) {
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return eaddr;
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}
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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mib[3] = 0;
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mib[3] = 0;
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mib[4] = NET_RT_IFLIST;
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mib[5] = 0;
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if (sysctl(mib, sizeof(mib), NULL, &needed, NULL, 0) < 0) {
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return NULL;
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}
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buf = malloc(needed);
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if( buf == NULL ) return NULL;
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if (sysctl(mib, sizeof(mib), buf, &needed, NULL, 0) < 0) {
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free(buf);
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return NULL;
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}
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lim = buf + needed;
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for (next = buf; next < lim; next += ifm->ifm_msglen) {
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ifm = (struct if_msghdr *)next;
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sdl = (struct sockaddr_dl *)(ifm + 1);
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if ( sdl->sdl_family != AF_LINK || sdl->sdl_alen == 6 ) {
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AC_MEMCPY(eaddr,
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(unsigned char *)sdl->sdl_data + sdl->sdl_nlen,
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sizeof(eaddr));
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free(buf);
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return eaddr;
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}
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}
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free(buf);
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return NULL;
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#elif defined (SIOCGIFADDR)
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char buf[sizeof(struct ifreq) * 32];
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struct ifconf ifc;
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struct ifreq *ifr;
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struct sockaddr *sa;
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struct sockaddr_dl *sdl;
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unsigned char *p;
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int s, i;
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if (memcmp(eaddr, zero, sizeof(eaddr))) {
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return eaddr;
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}
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s = socket( AF_INET, SOCK_DGRAM, 0 );
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if ( s < 0 ) {
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return NULL;
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}
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ifc.ifc_len = sizeof( buf );
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ifc.ifc_buf = buf;
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memset( buf, 0, sizeof( buf ) );
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i = ioctl( s, SIOCGIFCONF, (char *)&ifc );
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close( s );
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if( i < 0 ) {
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return NULL;
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}
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for ( i = 0; i < ifc.ifc_len; ) {
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ifr = (struct ifreq *)&ifc.ifc_buf[i];
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sa = &ifr->ifr_addr;
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if ( sa->sa_len > sizeof( ifr->ifr_addr ) ) {
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i += sizeof( ifr->ifr_name ) + sa->sa_len;
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} else {
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i += sizeof( *ifr );
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}
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if ( sa->sa_family != AF_LINK ) {
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continue;
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}
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sdl = (struct sockaddr_dl *)sa;
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if ( sdl->sdl_alen == 6 ) {
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AC_MEMCPY(eaddr,
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(unsigned char *)sdl->sdl_data + sdl->sdl_nlen,
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sizeof(eaddr));
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return eaddr;
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}
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}
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return NULL;
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#else
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if (memcmp(eaddr, zero, sizeof(eaddr)) == 0) {
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/* XXX - who knows? */
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lutil_entropy( eaddr, sizeof(eaddr) );
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eaddr[0] |= 0x80; /* turn it into a mutlicast address */
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}
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return eaddr;
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#endif
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}
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#endif
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/*
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** All we really care about is an ISO UUID string. The format of a UUID is:
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** field octet note
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** time_low 0-3 low field of the timestamp
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** time_mid 4-5 middle field of timestamp
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** time_hi_and_version 6-7 high field of timestamp and
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** version number
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** clock_seq_hi_and_resv 8 high field of clock sequence
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** and variant
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** clock_seq_low 9 low field of clock sequence
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** node 10-15 spacially unique identifier
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**
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** We use DCE version one, and the DCE variant. Our unique identifier is
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** the first ethernet address on the system.
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*/
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size_t
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lutil_uuidstr( char *buf, size_t len )
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{
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#ifdef HAVE_UUID_TO_STR
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uuid_t uu = {0};
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unsigned rc;
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char *s;
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size_t l;
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uuid_create( &uu, &rc );
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if ( rc != uuid_s_ok ) {
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return 0;
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}
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uuid_to_str( &uu, &s, &rc );
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if ( rc != uuid_s_ok ) {
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return 0;
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}
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l = strlen( s );
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if ( l >= len ) {
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free( s );
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return 0;
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}
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strncpy( buf, s, len );
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free( s );
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return l;
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#elif defined( _WIN32 )
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UUID uuid;
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unsigned char *uuidstr;
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size_t uuidlen;
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if( UuidCreate( &uuid ) != RPC_S_OK ) {
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return 0;
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}
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if( UuidToString( &uuid, &uuidstr ) != RPC_S_OK ) {
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return 0;
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}
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uuidlen = strlen( uuidstr );
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if( uuidlen >= len ) {
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return 0;
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}
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strncpy( buf, uuidstr, len );
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RpcStringFree( &uuidstr );
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return uuidlen;
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#else
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struct timeval tv;
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unsigned long long tl;
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unsigned char *nl;
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unsigned short t2, t3, s1;
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unsigned int t1;
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/*
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* Theoretically we should delay if seq wraps within 100usec but for now
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* systems are not fast enough to worry about it.
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*/
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static int inited = 0;
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static unsigned short seq;
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if (!inited) {
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lutil_entropy( (unsigned char *) &seq, sizeof(seq) );
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inited++;
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}
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#ifdef HAVE_GETTIMEOFDAY
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gettimeofday( &tv, 0 );
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#else
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time( &tv.tv_sec );
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tv.tv_usec = 0;
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#endif
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tl = ( tv.tv_sec * 10000000LL ) + ( tv.tv_usec * 10LL ) + UUID_TPLUS;
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nl = lutil_eaddr();
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t1 = tl & 0xffffffff; /* time_low */
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t2 = ( tl >> 32 ) & 0xffff; /* time_mid */
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t3 = ( ( tl >> 48 ) & 0x0fff ) | 0x1000; /* time_hi_and_version */
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s1 = ( ++seq & 0x1fff ) | 0x8000; /* clock_seq_and_reserved */
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t1 = snprintf( buf, len,
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"%08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
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t1, (unsigned) t2, (unsigned) t3, (unsigned) s1,
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(unsigned) nl[0], (unsigned) nl[1],
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(unsigned) nl[2], (unsigned) nl[3],
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(unsigned) nl[4], (unsigned) nl[5] );
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return (t1 < len) ? t1 : 0;
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#endif
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}
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#ifdef TEST
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int
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main(int argc, char **argv)
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{
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char buf1[8], buf2[64];
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#ifndef HAVE_UUID_TO_STR
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unsigned char *p = lutil_eaddr();
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if( p ) {
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printf( "Ethernet Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
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(unsigned) p[0], (unsigned) p[1], (unsigned) p[2],
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(unsigned) p[3], (unsigned) p[4], (unsigned) p[5]);
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}
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#endif
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if ( lutil_uuidstr( buf1, sizeof( buf1 ) ) ) {
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printf( "UUID: %s\n", buf1 );
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} else {
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fprintf( stderr, "too short: %ld\n", (long) sizeof( buf1 ) );
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}
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if ( lutil_uuidstr( buf2, sizeof( buf2 ) ) ) {
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printf( "UUID: %s\n", buf2 );
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} else {
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fprintf( stderr, "too short: %ld\n", (long) sizeof( buf2 ) );
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}
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if ( lutil_uuidstr( buf2, sizeof( buf2 ) ) ) {
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printf( "UUID: %s\n", buf2 );
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} else {
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fprintf( stderr, "too short: %ld\n", (long) sizeof( buf2 ) );
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}
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return 0;
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}
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#endif
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