Adding upstream version 2.5.13+dfsg.upstream/2.5.13+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1026 insertions, 0 deletions

diff --git a/libraries/libldap/util-int.c b/libraries/libldap/util-int.c
new file mode 100644
index 0000000..57c6523
--- /dev/null
+++ b/libraries/libldap/util-int.c
@@ -0,0 +1,1026 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 The OpenLDAP Foundation.
+ * Portions Copyright 1998 A. Hartgers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Bart Hartgers for inclusion in
+ * OpenLDAP Software.
+ */
+
+/*
+ * util-int.c	Various functions to replace missing threadsafe ones.
+ *				Without the real *_r funcs, things will
+ *				work, but might not be threadsafe. 
+ */
+
+#include "portable.h"
+
+#include <ac/stdlib.h>
+
+#include <ac/errno.h>
+#include <ac/socket.h>
+#include <ac/string.h>
+#include <ac/time.h>
+#include <ac/unistd.h>
+
+#include "ldap-int.h"
+
+#ifndef h_errno
+/* newer systems declare this in <netdb.h> for you, older ones don't.
+ * harmless to declare it again (unless defined by a macro).
+ */
+extern int h_errno;
+#endif
+
+#ifdef HAVE_HSTRERROR
+# define HSTRERROR(e)	hstrerror(e)
+#else
+# define HSTRERROR(e)	hp_strerror(e)
+#endif
+
+#ifndef LDAP_R_COMPILE
+# undef HAVE_REENTRANT_FUNCTIONS
+# undef HAVE_CTIME_R
+# undef HAVE_GETHOSTBYNAME_R
+# undef HAVE_GETHOSTBYADDR_R
+
+#else
+# include <ldap_pvt_thread.h>
+  ldap_pvt_thread_mutex_t ldap_int_resolv_mutex;
+  ldap_pvt_thread_mutex_t ldap_int_hostname_mutex;
+  static ldap_pvt_thread_mutex_t ldap_int_gettime_mutex;
+
+# if (defined( HAVE_CTIME_R ) || defined( HAVE_REENTRANT_FUNCTIONS)) \
+	 && defined( CTIME_R_NARGS )
+#   define USE_CTIME_R
+# else
+	static ldap_pvt_thread_mutex_t ldap_int_ctime_mutex;
+# endif
+
+/* USE_GMTIME_R and USE_LOCALTIME_R defined in ldap_pvt.h */
+
+#if !defined( USE_GMTIME_R ) || !defined( USE_LOCALTIME_R )
+	/* we use the same mutex for gmtime(3) and localtime(3)
+	 * because implementations may use the same buffer
+	 * for both functions */
+	static ldap_pvt_thread_mutex_t ldap_int_gmtime_mutex;
+#endif
+
+# if defined(HAVE_GETHOSTBYNAME_R) && \
+	(GETHOSTBYNAME_R_NARGS < 5) || (6 < GETHOSTBYNAME_R_NARGS)
+	/* Don't know how to handle this version, pretend it's not there */
+#	undef HAVE_GETHOSTBYNAME_R
+# endif
+# if defined(HAVE_GETHOSTBYADDR_R) && \
+	(GETHOSTBYADDR_R_NARGS < 7) || (8 < GETHOSTBYADDR_R_NARGS)
+	/* Don't know how to handle this version, pretend it's not there */
+#	undef HAVE_GETHOSTBYADDR_R
+# endif
+#endif /* LDAP_R_COMPILE */
+
+char *ldap_pvt_ctime( const time_t *tp, char *buf )
+{
+#ifdef USE_CTIME_R
+# if (CTIME_R_NARGS > 3) || (CTIME_R_NARGS < 2)
+#	error "CTIME_R_NARGS should be 2 or 3"
+# elif CTIME_R_NARGS > 2 && defined(CTIME_R_RETURNS_INT)
+	return( ctime_r(tp,buf,26) < 0 ? 0 : buf );
+# elif CTIME_R_NARGS > 2
+	return ctime_r(tp,buf,26);
+# else
+	return ctime_r(tp,buf);
+# endif	  
+
+#else
+
+	LDAP_MUTEX_LOCK( &ldap_int_ctime_mutex );
+	AC_MEMCPY( buf, ctime(tp), 26 );
+	LDAP_MUTEX_UNLOCK( &ldap_int_ctime_mutex );
+
+	return buf;
+#endif	
+}
+
+#if !defined( USE_GMTIME_R ) || !defined( USE_LOCALTIME_R )
+int
+ldap_pvt_gmtime_lock( void )
+{
+# ifndef LDAP_R_COMPILE
+	return 0;
+# else /* LDAP_R_COMPILE */
+	return ldap_pvt_thread_mutex_lock( &ldap_int_gmtime_mutex );
+# endif /* LDAP_R_COMPILE */
+}
+
+int
+ldap_pvt_gmtime_unlock( void )
+{
+# ifndef LDAP_R_COMPILE
+	return 0;
+# else /* LDAP_R_COMPILE */
+	return ldap_pvt_thread_mutex_unlock( &ldap_int_gmtime_mutex );
+# endif /* LDAP_R_COMPILE */
+}
+#endif /* !USE_GMTIME_R || !USE_LOCALTIME_R */
+
+#ifndef USE_GMTIME_R
+struct tm *
+ldap_pvt_gmtime( const time_t *timep, struct tm *result )
+{
+	struct tm *tm_ptr;
+
+	LDAP_MUTEX_LOCK( &ldap_int_gmtime_mutex );
+	tm_ptr = gmtime( timep );
+	if ( tm_ptr == NULL ) {
+		result = NULL;
+
+	} else {
+		*result = *tm_ptr;
+	}
+	LDAP_MUTEX_UNLOCK( &ldap_int_gmtime_mutex );
+
+	return result;
+}
+#endif /* !USE_GMTIME_R */
+
+#ifndef USE_LOCALTIME_R
+struct tm *
+ldap_pvt_localtime( const time_t *timep, struct tm *result )
+{
+	struct tm *tm_ptr;
+
+	LDAP_MUTEX_LOCK( &ldap_int_gmtime_mutex );
+	tm_ptr = localtime( timep );
+	if ( tm_ptr == NULL ) {
+		result = NULL;
+
+	} else {
+		*result = *tm_ptr;
+	}
+	LDAP_MUTEX_UNLOCK( &ldap_int_gmtime_mutex );
+
+	return result;
+}
+#endif /* !USE_LOCALTIME_R */
+
+static int _ldap_pvt_gt_subs;
+
+#ifdef _WIN32
+/* Windows SYSTEMTIME only has 10 millisecond resolution, so we
+ * also need to use a high resolution timer to get nanoseconds.
+ * This is pretty clunky.
+ */
+static LARGE_INTEGER _ldap_pvt_gt_freq;
+static LARGE_INTEGER _ldap_pvt_gt_prev;
+static int _ldap_pvt_gt_offset;
+
+#define SEC_TO_UNIX_EPOCH 11644473600LL
+#define TICKS_PER_SECOND 10000000
+#define BILLION	1000000000L
+
+static int
+ldap_pvt_gettimensec(int *sec)
+{
+	LARGE_INTEGER count;
+
+	QueryPerformanceCounter( &count );
+
+	/* It shouldn't ever go backwards, but multiple CPUs might
+	 * be able to hit in the same tick.
+	 */
+	LDAP_MUTEX_LOCK( &ldap_int_gettime_mutex );
+	/* We assume Windows has at least a vague idea of
+	 * when a second begins. So we align our nanosecond count
+	 * with the Windows millisecond count using this offset.
+	 * We retain the submillisecond portion of our own count.
+	 *
+	 * Note - this also assumes that the relationship between
+	 * the PerformanceCounter and SystemTime stays constant;
+	 * that assumption breaks if the SystemTime is adjusted by
+	 * an external action.
+	 */
+	if ( !_ldap_pvt_gt_freq.QuadPart ) {
+		LARGE_INTEGER c2;
+		ULARGE_INTEGER ut;
+		FILETIME ft0, ft1;
+		long long t;
+		int nsec;
+
+		/* Initialize our offset */
+		QueryPerformanceFrequency( &_ldap_pvt_gt_freq );
+
+		/* Wait for a tick of the system time: 10-15ms */
+		GetSystemTimeAsFileTime( &ft0 );
+		do {
+			GetSystemTimeAsFileTime( &ft1 );
+		} while ( ft1.dwLowDateTime == ft0.dwLowDateTime );
+
+		ut.LowPart = ft1.dwLowDateTime;
+		ut.HighPart = ft1.dwHighDateTime;
+		QueryPerformanceCounter( &c2 );
+
+		/* get second and fraction portion of counter */
+		t = c2.QuadPart % (_ldap_pvt_gt_freq.QuadPart*10);
+
+		/* convert to nanoseconds */
+		t *= BILLION;
+		nsec = t / _ldap_pvt_gt_freq.QuadPart;
+
+		ut.QuadPart /= 10;
+		ut.QuadPart %= (10 * BILLION);
+		_ldap_pvt_gt_offset = nsec - ut.QuadPart;
+		count = c2;
+	}
+	if ( count.QuadPart <= _ldap_pvt_gt_prev.QuadPart ) {
+		_ldap_pvt_gt_subs++;
+	} else {
+		_ldap_pvt_gt_subs = 0;
+		_ldap_pvt_gt_prev = count;
+	}
+	LDAP_MUTEX_UNLOCK( &ldap_int_gettime_mutex );
+
+	/* convert to nanoseconds */
+	count.QuadPart %= _ldap_pvt_gt_freq.QuadPart*10;
+	count.QuadPart *= BILLION;
+	count.QuadPart /= _ldap_pvt_gt_freq.QuadPart;
+	count.QuadPart -= _ldap_pvt_gt_offset;
+
+	/* We've extracted the 1s and nanoseconds.
+	 * The 1sec digit is used to detect wraparound in nanosecnds.
+	 */
+	if (count.QuadPart < 0)
+		count.QuadPart += (10 * BILLION);
+	else if (count.QuadPart >= (10 * BILLION))
+		count.QuadPart -= (10 * BILLION);
+
+	*sec = count.QuadPart / BILLION;
+	return count.QuadPart % BILLION;
+}
+
+
+/* emulate POSIX clock_gettime */
+int
+ldap_pvt_clock_gettime( int clk_id, struct timespec *tv )
+{
+	FILETIME ft;
+	ULARGE_INTEGER ut;
+	int sec, sec0;
+
+	GetSystemTimeAsFileTime( &ft );
+	ut.LowPart = ft.dwLowDateTime;
+	ut.HighPart = ft.dwHighDateTime;
+
+	/* convert to sec */
+	ut.QuadPart /= TICKS_PER_SECOND;
+
+	tv->tv_nsec = ldap_pvt_gettimensec(&sec);
+	tv->tv_sec = ut.QuadPart - SEC_TO_UNIX_EPOCH;
+
+	/* check for carry from microseconds */
+	sec0 = tv->tv_sec % 10;
+	if (sec0 < sec || (sec0 == 9 && !sec))
+		tv->tv_sec++;
+
+	return 0;
+}
+
+/* emulate POSIX gettimeofday */
+int
+ldap_pvt_gettimeofday( struct timeval *tv, void *unused )
+{
+	struct timespec ts;
+	ldap_pvt_clock_gettime( 0, &ts );
+	tv->tv_sec = ts.tv_sec;
+	tv->tv_usec = ts.tv_nsec / 1000;
+	return 0;
+}
+
+
+/* return a broken out time, with nanoseconds
+ */
+void
+ldap_pvt_gettime( struct lutil_tm *tm )
+{
+	SYSTEMTIME st;
+	int sec, sec0;
+	static const char daysPerMonth[] = {
+	31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+
+	GetSystemTime( &st );
+	tm->tm_nsec = ldap_pvt_gettimensec(&sec);
+	tm->tm_usub = _ldap_pvt_gt_subs;
+
+	/* any difference larger than nanoseconds is
+	 * already reflected in st
+	 */
+	tm->tm_sec = st.wSecond;
+	tm->tm_min = st.wMinute;
+	tm->tm_hour = st.wHour;
+	tm->tm_mday = st.wDay;
+	tm->tm_mon = st.wMonth - 1;
+	tm->tm_year = st.wYear - 1900;
+
+	/* check for carry from nanoseconds */
+	sec0 = tm->tm_sec % 10;
+	if (sec0 < sec || (sec0 == 9 && !sec)) {
+		tm->tm_sec++;
+		/* FIXME: we don't handle leap seconds */
+		if (tm->tm_sec > 59) {
+			tm->tm_sec = 0;
+			tm->tm_min++;
+			if (tm->tm_min > 59) {
+				tm->tm_min = 0;
+				tm->tm_hour++;
+				if (tm->tm_hour > 23) {
+					int days = daysPerMonth[tm->tm_mon];
+					tm->tm_hour = 0;
+					tm->tm_mday++;
+
+					/* if it's February of a leap year,
+					 * add 1 day to this month
+					 */
+					if (tm->tm_mon == 1 &&
+						((!(st.wYear % 4) && (st.wYear % 100)) ||
+						!(st.wYear % 400)))
+						days++;
+
+					if (tm->tm_mday > days) {
+						tm->tm_mday = 1;
+						tm->tm_mon++;
+						if (tm->tm_mon > 11) {
+							tm->tm_mon = 0;
+							tm->tm_year++;
+						}
+					}
+				}
+			}
+		}
+	}
+}
+#else
+
+#ifdef HAVE_CLOCK_GETTIME
+static struct timespec _ldap_pvt_gt_prevTv;
+#else
+static struct timeval _ldap_pvt_gt_prevTv;
+#endif
+
+void
+ldap_pvt_gettime( struct lutil_tm *ltm )
+{
+	struct tm tm;
+	time_t t;
+#ifdef HAVE_CLOCK_GETTIME
+#define	FRAC	tv_nsec
+#define	NSECS(x)	x
+	struct timespec tv;
+
+	clock_gettime( CLOCK_REALTIME, &tv );
+#else
+#define	FRAC	tv_usec
+#define	NSECS(x)	x * 1000
+	struct timeval tv;
+
+	gettimeofday( &tv, NULL );
+#endif
+	t = tv.tv_sec;
+
+	LDAP_MUTEX_LOCK( &ldap_int_gettime_mutex );
+	if ( tv.tv_sec < _ldap_pvt_gt_prevTv.tv_sec
+		|| ( tv.tv_sec == _ldap_pvt_gt_prevTv.tv_sec
+		&& tv.FRAC <= _ldap_pvt_gt_prevTv.FRAC )) {
+		_ldap_pvt_gt_subs++;
+	} else {
+		_ldap_pvt_gt_subs = 0;
+		_ldap_pvt_gt_prevTv = tv;
+	}
+	LDAP_MUTEX_UNLOCK( &ldap_int_gettime_mutex );
+
+	ltm->tm_usub = _ldap_pvt_gt_subs;
+
+	ldap_pvt_gmtime( &t, &tm );
+
+	ltm->tm_sec = tm.tm_sec;
+	ltm->tm_min = tm.tm_min;
+	ltm->tm_hour = tm.tm_hour;
+	ltm->tm_mday = tm.tm_mday;
+	ltm->tm_mon = tm.tm_mon;
+	ltm->tm_year = tm.tm_year;
+	ltm->tm_nsec = NSECS(tv.FRAC);
+}
+#endif
+
+size_t
+ldap_pvt_csnstr(char *buf, size_t len, unsigned int replica, unsigned int mod)
+{
+	struct lutil_tm tm;
+	int n;
+
+	ldap_pvt_gettime( &tm );
+
+	n = snprintf( buf, len,
+		"%4d%02d%02d%02d%02d%02d.%06dZ#%06x#%03x#%06x",
+		tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour,
+		tm.tm_min, tm.tm_sec, tm.tm_nsec / 1000, tm.tm_usub, replica, mod );
+
+	if( n < 0 ) return 0;
+	return ( (size_t) n < len ) ? n : 0;
+}
+
+#define BUFSTART (1024-32)
+#define BUFMAX (32*1024-32)
+
+#if defined(LDAP_R_COMPILE)
+static char *safe_realloc( char **buf, int len );
+
+#if !(defined(HAVE_GETHOSTBYNAME_R) && defined(HAVE_GETHOSTBYADDR_R))
+static int copy_hostent( struct hostent *res,
+	char **buf, struct hostent * src );
+#endif
+#endif
+
+int ldap_pvt_gethostbyname_a(
+	const char *name, 
+	struct hostent *resbuf,
+	char **buf,
+	struct hostent **result,
+	int *herrno_ptr )
+{
+#if defined( HAVE_GETHOSTBYNAME_R )
+
+# define NEED_SAFE_REALLOC 1   
+	int r=-1;
+	int buflen=BUFSTART;
+	*buf = NULL;
+	for(;buflen<BUFMAX;) {
+		if (safe_realloc( buf, buflen )==NULL)
+			return r;
+
+#if (GETHOSTBYNAME_R_NARGS < 6)
+		*result=gethostbyname_r( name, resbuf, *buf, buflen, herrno_ptr );
+		r = (*result == NULL) ?  -1 : 0;
+#else
+		while((r = gethostbyname_r( name, resbuf, *buf, buflen, result, herrno_ptr )) == ERANGE) {
+			/* Increase the buffer */
+			buflen*=2;
+			if (safe_realloc(buf, buflen) == NULL)
+				return -1;
+		}
+#endif
+
+		Debug2( LDAP_DEBUG_TRACE, "ldap_pvt_gethostbyname_a: host=%s, r=%d\n",
+		       name, r );
+
+#ifdef NETDB_INTERNAL
+		if ((r<0) &&
+			(*herrno_ptr==NETDB_INTERNAL) &&
+			(errno==ERANGE))
+		{
+			buflen*=2;
+			continue;
+	 	}
+#endif
+		return r;
+	}
+	return -1;
+#elif defined( LDAP_R_COMPILE )
+# define NEED_COPY_HOSTENT   
+	struct hostent *he;
+	int	retval;
+	*buf = NULL;
+	
+	LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
+	
+	he = gethostbyname( name );
+	
+	if (he==NULL) {
+		*herrno_ptr = h_errno;
+		retval = -1;
+	} else if (copy_hostent( resbuf, buf, he )<0) {
+		*herrno_ptr = -1;
+		retval = -1;
+	} else {
+		*result = resbuf;
+		retval = 0;
+	}
+	
+	LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
+	
+	return retval;
+#else	
+	*buf = NULL;
+	*result = gethostbyname( name );
+
+	if (*result!=NULL) {
+		return 0;
+	}
+
+	*herrno_ptr = h_errno;
+	
+	return -1;
+#endif	
+}
+
+#if !defined( HAVE_GETNAMEINFO ) && !defined( HAVE_HSTRERROR )
+static const char *
+hp_strerror( int err )
+{
+	switch (err) {
+	case HOST_NOT_FOUND:	return _("Host not found (authoritative)");
+	case TRY_AGAIN:			return _("Host not found (server fail?)");
+	case NO_RECOVERY:		return _("Non-recoverable failure");
+	case NO_DATA:			return _("No data of requested type");
+#ifdef NETDB_INTERNAL
+	case NETDB_INTERNAL:	return STRERROR( errno );
+#endif
+	}
+	return _("Unknown resolver error");
+}
+#endif
+
+int ldap_pvt_get_hname(
+	const struct sockaddr *sa,
+	int len,
+	char *name,
+	int namelen,
+	char **err )
+{
+	int rc;
+#if defined( HAVE_GETNAMEINFO )
+
+	LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
+	rc = getnameinfo( sa, len, name, namelen, NULL, 0, 0 );
+	LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
+	if ( rc ) *err = (char *)AC_GAI_STRERROR( rc );
+	return rc;
+
+#else /* !HAVE_GETNAMEINFO */
+	char *addr;
+	int alen;
+	struct hostent *hp = NULL;
+#ifdef HAVE_GETHOSTBYADDR_R
+	struct hostent hb;
+	int buflen=BUFSTART, h_errno;
+	char *buf=NULL;
+#endif
+
+#ifdef LDAP_PF_INET6
+	if (sa->sa_family == AF_INET6) {
+		struct sockaddr_in6 *sin = (struct sockaddr_in6 *)sa;
+		addr = (char *)&sin->sin6_addr;
+		alen = sizeof(sin->sin6_addr);
+	} else
+#endif
+	if (sa->sa_family == AF_INET) {
+		struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+		addr = (char *)&sin->sin_addr;
+		alen = sizeof(sin->sin_addr);
+	} else {
+		rc = NO_RECOVERY;
+		*err = (char *)HSTRERROR( rc );
+		return rc;
+	}
+#if defined( HAVE_GETHOSTBYADDR_R )
+	for(;buflen<BUFMAX;) {
+		if (safe_realloc( &buf, buflen )==NULL) {
+			*err = (char *)STRERROR( ENOMEM );
+			return ENOMEM;
+		}
+#if (GETHOSTBYADDR_R_NARGS < 8)
+		hp=gethostbyaddr_r( addr, alen, sa->sa_family,
+			&hb, buf, buflen, &h_errno );
+		rc = (hp == NULL) ? -1 : 0;
+#else
+		rc = gethostbyaddr_r( addr, alen, sa->sa_family,
+			&hb, buf, buflen, 
+			&hp, &h_errno );
+#endif
+#ifdef NETDB_INTERNAL
+		if ((rc<0) &&
+			(h_errno==NETDB_INTERNAL) &&
+			(errno==ERANGE))
+		{
+			buflen*=2;
+			continue;
+		}
+#endif
+		break;
+	}
+	if (hp) {
+		strncpy( name, hp->h_name, namelen );
+	} else {
+		*err = (char *)HSTRERROR( h_errno );
+	}
+	LDAP_FREE(buf);
+#else /* HAVE_GETHOSTBYADDR_R */
+
+	LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
+	hp = gethostbyaddr( addr, alen, sa->sa_family );
+	if (hp) {
+		strncpy( name, hp->h_name, namelen );
+		rc = 0;
+	} else {
+		rc = h_errno;
+		*err = (char *)HSTRERROR( h_errno );
+	}
+	LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
+
+#endif	/* !HAVE_GETHOSTBYADDR_R */
+	return rc;
+#endif	/* !HAVE_GETNAMEINFO */
+}
+
+int ldap_pvt_gethostbyaddr_a(
+	const char *addr,
+	int len,
+	int type,
+	struct hostent *resbuf,
+	char **buf,
+	struct hostent **result,
+	int *herrno_ptr )
+{
+#if defined( HAVE_GETHOSTBYADDR_R )
+
+# undef NEED_SAFE_REALLOC
+# define NEED_SAFE_REALLOC   
+	int r=-1;
+	int buflen=BUFSTART;
+	*buf = NULL;   
+	for(;buflen<BUFMAX;) {
+		if (safe_realloc( buf, buflen )==NULL)
+			return r;
+#if (GETHOSTBYADDR_R_NARGS < 8)
+		*result=gethostbyaddr_r( addr, len, type,
+			resbuf, *buf, buflen, herrno_ptr );
+		r = (*result == NULL) ? -1 : 0;
+#else
+		r = gethostbyaddr_r( addr, len, type,
+			resbuf, *buf, buflen, 
+			result, herrno_ptr );
+#endif
+
+#ifdef NETDB_INTERNAL
+		if ((r<0) &&
+			(*herrno_ptr==NETDB_INTERNAL) &&
+			(errno==ERANGE))
+		{
+			buflen*=2;
+			continue;
+		}
+#endif
+		return r;
+	}
+	return -1;
+#elif defined( LDAP_R_COMPILE )
+# undef NEED_COPY_HOSTENT
+# define NEED_COPY_HOSTENT   
+	struct hostent *he;
+	int	retval;
+	*buf = NULL;   
+	
+	LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
+	he = gethostbyaddr( addr, len, type );
+	
+	if (he==NULL) {
+		*herrno_ptr = h_errno;
+		retval = -1;
+	} else if (copy_hostent( resbuf, buf, he )<0) {
+		*herrno_ptr = -1;
+		retval = -1;
+	} else {
+		*result = resbuf;
+		retval = 0;
+	}
+	LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
+	
+	return retval;
+
+#else /* gethostbyaddr() */
+	*buf = NULL;   
+	*result = gethostbyaddr( addr, len, type );
+
+	if (*result!=NULL) {
+		return 0;
+	}
+	return -1;
+#endif	
+}
+/* 
+ * ldap_int_utils_init() should be called before any other function.
+ */
+
+void ldap_int_utils_init( void )
+{
+	static int done=0;
+	if (done)
+	  return;
+	done=1;
+
+#ifdef LDAP_R_COMPILE
+#if !defined( USE_CTIME_R ) && !defined( HAVE_REENTRANT_FUNCTIONS )
+	ldap_pvt_thread_mutex_init( &ldap_int_ctime_mutex );
+#endif
+#if !defined( USE_GMTIME_R ) && !defined( USE_LOCALTIME_R )
+	ldap_pvt_thread_mutex_init( &ldap_int_gmtime_mutex );
+#endif
+	ldap_pvt_thread_mutex_init( &ldap_int_resolv_mutex );
+
+	ldap_pvt_thread_mutex_init( &ldap_int_hostname_mutex );
+
+	ldap_pvt_thread_mutex_init( &ldap_int_gettime_mutex );
+
+#endif
+
+	/* call other module init functions here... */
+}
+
+#if defined( NEED_COPY_HOSTENT )
+# undef NEED_SAFE_REALLOC
+#define NEED_SAFE_REALLOC
+
+static char *cpy_aliases(
+	char ***tgtio,
+	char *buf,
+	char **src )
+{
+	int len;
+	char **tgt=*tgtio;
+	for( ; (*src) ; src++ ) {
+		len = strlen( *src ) + 1;
+		AC_MEMCPY( buf, *src, len );
+		*tgt++=buf;
+		buf+=len;
+	}
+	*tgtio=tgt;   
+	return buf;
+}
+
+static char *cpy_addresses(
+	char ***tgtio,
+	char *buf,
+	char **src,
+	int len )
+{
+   	char **tgt=*tgtio;
+	for( ; (*src) ; src++ ) {
+		AC_MEMCPY( buf, *src, len );
+		*tgt++=buf;
+		buf+=len;
+	}
+	*tgtio=tgt;      
+	return buf;
+}
+
+static int copy_hostent(
+	struct hostent *res,
+	char **buf,
+	struct hostent * src )
+{
+	char	**p;
+	char	**tp;
+	char	*tbuf;
+	int	name_len;
+	int	n_alias=0;
+	int	total_alias_len=0;
+	int	n_addr=0;
+	int	total_addr_len=0;
+	int	total_len;
+	  
+	/* calculate the size needed for the buffer */
+	name_len = strlen( src->h_name ) + 1;
+	
+	if( src->h_aliases != NULL ) {
+		for( p = src->h_aliases; (*p) != NULL; p++ ) {
+			total_alias_len += strlen( *p ) + 1;
+			n_alias++; 
+		}
+	}
+
+	if( src->h_addr_list != NULL ) {
+		for( p = src->h_addr_list; (*p) != NULL; p++ ) {
+			n_addr++;
+		}
+		total_addr_len = n_addr * src->h_length;
+	}
+	
+	total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
+		total_addr_len + total_alias_len + name_len;
+	
+	if (safe_realloc( buf, total_len )) {			 
+		tp = (char **) *buf;
+		tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
+		AC_MEMCPY( res, src, sizeof( struct hostent ) );
+		/* first the name... */
+		AC_MEMCPY( tbuf, src->h_name, name_len );
+		res->h_name = tbuf; tbuf+=name_len;
+		/* now the aliases */
+		res->h_aliases = tp;
+		if ( src->h_aliases != NULL ) {
+			tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
+		}
+		*tp++=NULL;
+		/* finally the addresses */
+		res->h_addr_list = tp;
+		if ( src->h_addr_list != NULL ) {
+			tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
+		}
+		*tp++=NULL;
+		return 0;
+	}
+	return -1;
+}
+#endif
+
+#if defined( NEED_SAFE_REALLOC )
+static char *safe_realloc( char **buf, int len )
+{
+	char *tmpbuf;
+	tmpbuf = LDAP_REALLOC( *buf, len );
+	if (tmpbuf) {
+		*buf=tmpbuf;
+	} 
+	return tmpbuf;
+}
+#endif
+
+char * ldap_pvt_get_fqdn( char *name )
+{
+#ifdef HAVE_GETADDRINFO
+	struct addrinfo hints, *res;
+#else
+	char *ha_buf;
+	struct hostent *hp, he_buf;
+	int local_h_errno;
+#endif
+	int rc;
+	char *fqdn, hostbuf[MAXHOSTNAMELEN+1];
+
+	if( name == NULL ) {
+		if( gethostname( hostbuf, MAXHOSTNAMELEN ) == 0 ) {
+			hostbuf[MAXHOSTNAMELEN] = '\0';
+			name = hostbuf;
+		} else {
+			name = "localhost";
+		}
+	}
+
+#ifdef HAVE_GETADDRINFO
+	memset( &hints, 0, sizeof( hints ));
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_flags = AI_CANONNAME;
+
+	LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
+	rc = getaddrinfo( name, NULL, &hints, &res );
+	LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
+	if ( rc == 0 && res->ai_canonname ) {
+		fqdn = LDAP_STRDUP( res->ai_canonname );
+	} else {
+		fqdn = LDAP_STRDUP( name );
+	}
+	if ( rc == 0 )
+		freeaddrinfo( res );
+#else
+	rc = ldap_pvt_gethostbyname_a( name,
+		&he_buf, &ha_buf, &hp, &local_h_errno );
+
+	if( rc < 0 || hp == NULL || hp->h_name == NULL ) {
+		fqdn = LDAP_STRDUP( name );
+	} else {
+		fqdn = LDAP_STRDUP( hp->h_name );
+	}
+
+	LDAP_FREE( ha_buf );
+#endif
+	return fqdn;
+}
+
+#if ( defined( HAVE_GETADDRINFO ) || defined( HAVE_GETNAMEINFO ) ) \
+	&& !defined( HAVE_GAI_STRERROR )
+char *ldap_pvt_gai_strerror (int code) {
+	static struct {
+		int code;
+		const char *msg;
+	} values[] = {
+#ifdef EAI_ADDRFAMILY
+		{ EAI_ADDRFAMILY, N_("Address family for hostname not supported") },
+#endif
+		{ EAI_AGAIN, N_("Temporary failure in name resolution") },
+		{ EAI_BADFLAGS, N_("Bad value for ai_flags") },
+		{ EAI_FAIL, N_("Non-recoverable failure in name resolution") },
+		{ EAI_FAMILY, N_("ai_family not supported") },
+		{ EAI_MEMORY, N_("Memory allocation failure") },
+#ifdef EAI_NODATA
+		{ EAI_NODATA, N_("No address associated with hostname") },
+#endif    
+		{ EAI_NONAME, N_("Name or service not known") },
+		{ EAI_SERVICE, N_("Servname not supported for ai_socktype") },
+		{ EAI_SOCKTYPE, N_("ai_socktype not supported") },
+#ifdef EAI_SYSTEM
+		{ EAI_SYSTEM, N_("System error") },
+#endif
+		{ 0, NULL }
+	};
+
+	int i;
+
+	for ( i = 0; values[i].msg != NULL; i++ ) {
+		if ( values[i].code == code ) {
+			return (char *) _(values[i].msg);
+		}
+	}
+	
+	return _("Unknown error");
+}
+#endif
+
+/* format a socket address as a string */
+
+#ifdef HAVE_TCPD
+# include <tcpd.h>
+# define SOCKADDR_STRING_UNKNOWN	STRING_UNKNOWN
+#else /* ! TCP Wrappers */
+# define SOCKADDR_STRING_UNKNOWN	"unknown"
+#endif /* ! TCP Wrappers */
+
+void
+ldap_pvt_sockaddrstr( Sockaddr *sa, struct berval *addrbuf )
+{
+	char *addr;
+	switch( sa->sa_addr.sa_family ) {
+#ifdef LDAP_PF_LOCAL
+	case AF_LOCAL:
+		addrbuf->bv_len = snprintf( addrbuf->bv_val, addrbuf->bv_len,
+			"PATH=%s", sa->sa_un_addr.sun_path );
+		break;
+#endif
+#ifdef LDAP_PF_INET6
+	case AF_INET6:
+		strcpy(addrbuf->bv_val, "IP=");
+		if ( IN6_IS_ADDR_V4MAPPED(&sa->sa_in6_addr.sin6_addr) ) {
+#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
+			addr = (char *)inet_ntop( AF_INET,
+			   ((struct in_addr *)&sa->sa_in6_addr.sin6_addr.s6_addr[12]),
+			   addrbuf->bv_val+3, addrbuf->bv_len-3 );
+#else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
+			addr = inet_ntoa( *((struct in_addr *)
+					&sa->sa_in6_addr.sin6_addr.s6_addr[12]) );
+#endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
+			if ( !addr ) addr = SOCKADDR_STRING_UNKNOWN;
+			if ( addr != addrbuf->bv_val+3 ) {
+				addrbuf->bv_len = sprintf( addrbuf->bv_val+3, "%s:%d", addr,
+				 (unsigned) ntohs( sa->sa_in6_addr.sin6_port ) ) + 3;
+			} else {
+				int len = strlen( addr );
+				addrbuf->bv_len = sprintf( addr+len, ":%d",
+				 (unsigned) ntohs( sa->sa_in6_addr.sin6_port ) ) + len + 3;
+			}
+		} else {
+			addr = (char *)inet_ntop( AF_INET6,
+				      &sa->sa_in6_addr.sin6_addr,
+				      addrbuf->bv_val+4, addrbuf->bv_len-4 );
+			if ( !addr ) addr = SOCKADDR_STRING_UNKNOWN;
+			if ( addr != addrbuf->bv_val+4 ) {
+				addrbuf->bv_len = sprintf( addrbuf->bv_val+3, "[%s]:%d", addr,
+				 (unsigned) ntohs( sa->sa_in6_addr.sin6_port ) ) + 3;
+			} else {
+				int len = strlen( addr );
+				addrbuf->bv_val[3] = '[';
+				addrbuf->bv_len = sprintf( addr+len, "]:%d",
+				 (unsigned) ntohs( sa->sa_in6_addr.sin6_port ) ) + len + 4;
+			}
+		}
+		break;
+#endif /* LDAP_PF_INET6 */
+	case AF_INET:
+		strcpy(addrbuf->bv_val, "IP=");
+#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
+		addr = (char *)inet_ntop( AF_INET, &sa->sa_in_addr.sin_addr,
+			   addrbuf->bv_val+3, addrbuf->bv_len-3 );
+#else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
+		addr = inet_ntoa( sa->sa_in_addr.sin_addr );
+#endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
+		if ( !addr ) addr = SOCKADDR_STRING_UNKNOWN;
+		if ( addr != addrbuf->bv_val+3 ) {
+			addrbuf->bv_len = sprintf( addrbuf->bv_val+3, "%s:%d", addr,
+			 (unsigned) ntohs( sa->sa_in_addr.sin_port ) ) + 3;
+		} else {
+			int len = strlen( addr );
+			addrbuf->bv_len = sprintf( addr+len, ":%d",
+			 (unsigned) ntohs( sa->sa_in_addr.sin_port ) ) + len + 3;
+		}
+		break;
+	default:
+		addrbuf->bv_val[0] = '\0';
+	}
+}