X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=libraries%2Flibldap%2Futil-int.c;h=f0b5f72f04fe7950c8f7da7383b60aff8cdeaa0d;hb=7164c4c66215da39f03e353a9c72eba408abddbf;hp=54d9d814e8d1349e7bfb28eadfff6877ec246ec7;hpb=ddb0752b8f2a3e141467ef484d532d8f79b8879b;p=openldap

diff --git a/libraries/libldap/util-int.c b/libraries/libldap/util-int.c
index 54d9d814e8..f0b5f72f04 100644
--- a/libraries/libldap/util-int.c
+++ b/libraries/libldap/util-int.c
@@ -1,90 +1,325 @@
-/*
- * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2011 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 won't be
- *				  threadsafe. 
- * 
- * Written by Bart Hartgers.
- *
- * Copyright 1998, A. Hartgers, All rights reserved.
- * This software is not subject to any license of Eindhoven University of
- * Technology, since it was written in my spare time.
- *			
- * Redistribution and use in source and binary forms are permitted only
- * as authorized by the OpenLDAP Public License.  A copy of this
- * license is available at http://www.OpenLDAP.org/license.html or
- * in file LICENSE in the top-level directory of the distribution.
- */ 
+ *				Without the real *_r funcs, things will
+ *				work, but might not be threadsafe. 
+ */
 
 #include "portable.h"
 
-#include <stdlib.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"
 
-#if defined( LDAP_R_COMPILE )
-# include <ldap_pvt_thread.h>
-# if !defined( HAVE_REENTRANT_FUNCTIONS )
-#  if !defined( HAVE_CTIME_R )
-#   define LDAP_INT_CTIME_MUTEX 1
-#  endif
-#  if !defined( HAVE_GETHOSTBYNAME_R )
-#   define LDAP_INT_GETHOSTBYNAME_MUTEX 1
-#  endif
-#  if !defined( HAVE_GETHOSTBYADDR_R )
-#   define LDAP_INT_GETHOSTBYADDR_MUTEX 1
-#  endif
-# endif /* defined( HAVE_REENTRANT_FUNCTIONS ) */
-
-#if defined( LDAP_INT_CTIME_MUTEX )
-static ldap_pvt_thread_mutex_t ldap_int_ctime_mutex;
-#endif
-#if defined( LDAP_INT_GETHOSTBYNAME_MUTEX )
-static ldap_pvt_thread_mutex_t ldap_int_gethostbyname_mutex;
+#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
-#if defined( LDAP_INT_GETHOSTBYADDR_MUTEX )
-static ldap_pvt_thread_mutex_t ldap_int_gethostbyaddr_mutex;
+
+#ifdef HAVE_HSTRERROR
+# define HSTRERROR(e)	hstrerror(e)
+#else
+# define HSTRERROR(e)	hp_strerror(e)
 #endif
-#else /* LDAP_R_COMPILE */
-#undef HAVE_REENTRANT_FUNCTIONS
+
+#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;
+
+# 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 */
+
+#ifdef LDAP_DEVEL
+	/* to be released with 2.5 */
+#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
+#else /* ! LDAP_DEVEL */
+	ldap_pvt_thread_mutex_t ldap_int_gmtime_mutex;
+#endif /* ! LDAP_DEVEL */
+
+# 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 )
 {
-#if (defined( HAVE_CTIME_R ) || defined( HAVE_REENTRANT_FUNCTIONS)) \
-	&& defined( CTIME_R_NARGS )
+#ifdef USE_CTIME_R
 # if (CTIME_R_NARGS > 3) || (CTIME_R_NARGS < 2)
-	choke me!  nargs should have 2 or 3
+#	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
-# if defined( LDAP_INT_CTIME_MUTEX )
-	ldap_pvt_thread_mutex_lock( &ldap_int_ctime_mutex );
-# endif	
-	memcpy( buf, ctime(tp), 26 );
-# if defined( LDAP_INT_CTIME_MUTEX )
-	ldap_pvt_thread_mutex_unlock( &ldap_int_ctime_mutex );
-# endif	
+
+	LDAP_MUTEX_LOCK( &ldap_int_ctime_mutex );
+	AC_MEMCPY( buf, ctime(tp), 26 );
+	LDAP_MUTEX_UNLOCK( &ldap_int_ctime_mutex );
+
 	return buf;
 #endif	
 }
 
-#define BUFSTART 1024
-#define BUFMAX (32*1024)
+#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 */
+
+/* return a broken out time, with microseconds
+ * Must be mutex-protected.
+ */
+#ifdef _WIN32
+/* Windows SYSTEMTIME only has 10 millisecond resolution, so we
+ * also need to use a high resolution timer to get microseconds.
+ * This is pretty clunky.
+ */
+void
+ldap_pvt_gettime( struct lutil_tm *tm )
+{
+	static LARGE_INTEGER cFreq;
+	static LARGE_INTEGER prevCount;
+	static int subs;
+	static int offset;
+	LARGE_INTEGER count;
+	SYSTEMTIME st;
+
+	GetSystemTime( &st );
+	QueryPerformanceCounter( &count );
+
+	/* It shouldn't ever go backwards, but multiple CPUs might
+	 * be able to hit in the same tick.
+	 */
+	if ( count.QuadPart <= prevCount.QuadPart ) {
+		subs++;
+	} else {
+		subs = 0;
+		prevCount = count;
+	}
+
+	/* We assume Windows has at least a vague idea of
+	 * when a second begins. So we align our microsecond 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 PerformanceCouunter and SystemTime stays constant;
+	 * that assumption breaks if the SystemTime is adjusted by
+	 * an external action.
+	 */
+	if ( !cFreq.QuadPart ) {
+		long long t;
+		int usec;
+		QueryPerformanceFrequency( &cFreq );
+
+		/* just get sub-second portion of counter */
+		t = count.QuadPart % cFreq.QuadPart;
+
+		/* convert to microseconds */
+		t *= 1000000;
+		usec = t / cFreq.QuadPart;
+
+		offset = usec - st.wMilliseconds * 1000;
+	}
+
+	tm->tm_usub = subs;
+
+	/* convert to microseconds */
+	count.QuadPart %= cFreq.QuadPart;
+	count.QuadPart *= 1000000;
+	count.QuadPart /= cFreq.QuadPart;
+	count.QuadPart -= offset;
+
+	tm->tm_usec = count.QuadPart % 1000000;
+	if ( tm->tm_usec < 0 )
+		tm->tm_usec += 1000000;
+
+	/* any difference larger than microseconds 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;
+}
+#else
+void
+ldap_pvt_gettime( struct lutil_tm *ltm )
+{
+	struct timeval tv;
+	static struct timeval prevTv;
+	static int subs;
+
+	struct tm tm;
+	time_t t;
+
+	gettimeofday( &tv, NULL );
+	t = tv.tv_sec;
+
+	if ( tv.tv_sec < prevTv.tv_sec
+		|| ( tv.tv_sec == prevTv.tv_sec && tv.tv_usec <= prevTv.tv_usec )) {
+		subs++;
+	} else {
+		subs = 0;
+		prevTv = tv;
+	}
+
+	ltm->tm_usub = 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_usec = tv.tv_usec;
+}
+#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_usec, 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 );
-static int copy_hostent( struct hostent *res, char **buf, struct hostent * src );
+
+#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, 
@@ -93,7 +328,8 @@ int ldap_pvt_gethostbyname_a(
 	struct hostent **result,
 	int *herrno_ptr )
 {
-#if defined( HAVE_GETHOSTBYNAME_R ) || defined( HAVE_REENTRANT_FUNCTIONS )
+#if defined( HAVE_GETHOSTBYNAME_R )
+
 # define NEED_SAFE_REALLOC 1   
 	int r=-1;
 	int buflen=BUFSTART;
@@ -101,8 +337,18 @@ int ldap_pvt_gethostbyname_a(
 	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
 		r = gethostbyname_r( name, resbuf, *buf,
 			buflen, result, herrno_ptr );
+#endif
+
+		Debug( LDAP_DEBUG_TRACE, "ldap_pvt_gethostbyname_a: host=%s, r=%d\n",
+		       name, r, 0 );
+
 #ifdef NETDB_INTERNAL
 		if ((r<0) &&
 			(*herrno_ptr==NETDB_INTERNAL) &&
@@ -115,12 +361,13 @@ int ldap_pvt_gethostbyname_a(
 		return r;
 	}
 	return -1;
-#elif defined( LDAP_INT_GETHOSTBYNAME_MUTEX )
+#elif defined( LDAP_R_COMPILE )
 # define NEED_COPY_HOSTENT   
 	struct hostent *he;
 	int	retval;
+	*buf = NULL;
 	
-	ldap_pvt_thread_mutex_lock( &ldap_int_gethostbyname_mutex );
+	LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
 	
 	he = gethostbyname( name );
 	
@@ -135,10 +382,11 @@ int ldap_pvt_gethostbyname_a(
 		retval = 0;
 	}
 	
-	ldap_pvt_thread_mutex_unlock( &ldap_int_gethostbyname_mutex );
+	LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
 	
 	return retval;
 #else	
+	*buf = NULL;
 	*result = gethostbyname( name );
 
 	if (*result!=NULL) {
@@ -150,7 +398,116 @@ int ldap_pvt_gethostbyname_a(
 	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,
@@ -160,7 +517,8 @@ int ldap_pvt_gethostbyaddr_a(
 	struct hostent **result,
 	int *herrno_ptr )
 {
-#if defined( HAVE_GETHOSTBYADDR_R ) || defined( HAVE_REENTRANT_FUNCTIONS )
+#if defined( HAVE_GETHOSTBYADDR_R )
+
 # undef NEED_SAFE_REALLOC
 # define NEED_SAFE_REALLOC   
 	int r=-1;
@@ -169,9 +527,16 @@ int ldap_pvt_gethostbyaddr_a(
 	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) &&
@@ -184,14 +549,14 @@ int ldap_pvt_gethostbyaddr_a(
 		return r;
 	}
 	return -1;
-#elif defined( LDAP_INT_GETHOSTBYADDR_MUTEX )
+#elif defined( LDAP_R_COMPILE )
 # undef NEED_COPY_HOSTENT
 # define NEED_COPY_HOSTENT   
 	struct hostent *he;
 	int	retval;
+	*buf = NULL;   
 	
-	ldap_pvt_thread_mutex_lock( &ldap_int_gethostbyaddr_mutex );
-	
+	LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
 	he = gethostbyaddr( addr, len, type );
 	
 	if (he==NULL) {
@@ -204,11 +569,12 @@ int ldap_pvt_gethostbyaddr_a(
 		*result = resbuf;
 		retval = 0;
 	}
+	LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
 	
-	ldap_pvt_thread_mutex_unlock( &ldap_int_gethostbyaddr_mutex );
-	
-	return retval;   
+	return retval;
+
 #else /* gethostbyaddr() */
+	*buf = NULL;   
 	*result = gethostbyaddr( addr, len, type );
 
 	if (*result!=NULL) {
@@ -218,40 +584,50 @@ int ldap_pvt_gethostbyaddr_a(
 #endif	
 }
 /* 
- * ldap_pvt_init_utils() should be called before any other function.
+ * ldap_int_utils_init() should be called before any other function.
  */
 
-void ldap_pvt_init_utils( void )
+void ldap_int_utils_init( void )
 {
 	static int done=0;
 	if (done)
 	  return;
 	done=1;
-#if defined( LDAP_INT_CTIME_MUTEX )
-	ldap_pvt_thread_mutex_init( &ldap_int_ctime_mutex, NULL );
-#endif	
-#if defined( LDAP_INT_GETHOSTBYNAME_MUTEX )
-	ldap_pvt_thread_mutex_init( &ldap_int_gethostbyname_mutex, NULL );
+
+#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 );
+
+#ifdef HAVE_CYRUS_SASL
+	ldap_pvt_thread_mutex_init( &ldap_int_sasl_mutex );
 #endif
-#if defined( LDAP_INT_GETHOSTBYADDR_MUTEX )
-	ldap_pvt_thread_mutex_init( &ldap_int_gethostbyaddr_mutex, NULL );
+#ifdef HAVE_GSSAPI
+	ldap_pvt_thread_mutex_init( &ldap_int_gssapi_mutex );
 #endif
-#if defined( LDAP_R_COMPILE )
+#endif
+
 	/* call other module init functions here... */
-#endif	
 }
 
 #if defined( NEED_COPY_HOSTENT )
 # undef NEED_SAFE_REALLOC
 #define NEED_SAFE_REALLOC
 
-static char *cpy_aliases( char ***tgtio, char *buf, char **src )
+static char *cpy_aliases(
+	char ***tgtio,
+	char *buf,
+	char **src )
 {
 	int len;
 	char **tgt=*tgtio;
 	for( ; (*src) ; src++ ) {
 		len = strlen( *src ) + 1;
-		memcpy( buf, *src, len );
+		AC_MEMCPY( buf, *src, len );
 		*tgt++=buf;
 		buf+=len;
 	}
@@ -259,11 +635,15 @@ static char *cpy_aliases( char ***tgtio, char *buf, char **src )
 	return buf;
 }
 
-static char *cpy_addresses( char ***tgtio, char *buf, char **src, int len )
+static char *cpy_addresses(
+	char ***tgtio,
+	char *buf,
+	char **src,
+	int len )
 {
    	char **tgt=*tgtio;
 	for( ; (*src) ; src++ ) {
-		memcpy( buf, *src, len );
+		AC_MEMCPY( buf, *src, len );
 		*tgt++=buf;
 		buf+=len;
 	}
@@ -271,30 +651,37 @@ static char *cpy_addresses( char ***tgtio, char *buf, char **src, int len )
 	return buf;
 }
 
-static int copy_hostent( struct hostent *res, char **buf, struct hostent * src )
+static int copy_hostent(
+	struct hostent *res,
+	char **buf,
+	struct hostent * src )
 {
 	char	**p;
 	char	**tp;
 	char	*tbuf;
 	int	name_len;
-	int	n_alias;
-	int	total_alias_len;
-	int	n_addr;
-	int	total_addr_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;
 	
-	for( n_alias=total_alias_len=0, p=src->h_aliases; (*p) ; p++ ) {
-		total_alias_len += strlen( *p ) + 1;
-		n_alias++;
+	if( src->h_aliases != NULL ) {
+		for( p = src->h_aliases; (*p) != NULL; p++ ) {
+			total_alias_len += strlen( *p ) + 1;
+			n_alias++; 
+		}
 	}
 
-	for( n_addr=0, p=src->h_addr_list; (*p) ; p++ ) {
-		n_addr++;
+	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_addr_len = n_addr * src->h_length;
 	
 	total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
 		total_addr_len + total_alias_len + name_len;
@@ -302,17 +689,21 @@ static int copy_hostent( struct hostent *res, char **buf, struct hostent * src )
 	if (safe_realloc( buf, total_len )) {			 
 		tp = (char **) *buf;
 		tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
-		memcpy( res, src, sizeof( struct hostent ) );
+		AC_MEMCPY( res, src, sizeof( struct hostent ) );
 		/* first the name... */
-		memcpy( tbuf, src->h_name, name_len );
+		AC_MEMCPY( tbuf, src->h_name, name_len );
 		res->h_name = tbuf; tbuf+=name_len;
 		/* now the aliases */
 		res->h_aliases = tp;
-		tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
+		if ( src->h_aliases != NULL ) {
+			tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
+		}
 		*tp++=NULL;
 		/* finally the addresses */
 		res->h_addr_list = tp;
-		tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
+		if ( src->h_addr_list != NULL ) {
+			tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
+		}
 		*tp++=NULL;
 		return 0;
 	}
@@ -324,7 +715,7 @@ static int copy_hostent( struct hostent *res, char **buf, struct hostent * src )
 static char *safe_realloc( char **buf, int len )
 {
 	char *tmpbuf;
-	tmpbuf = realloc( *buf, len );
+	tmpbuf = LDAP_REALLOC( *buf, len );
 	if (tmpbuf) {
 		*buf=tmpbuf;
 	} 
@@ -332,4 +723,68 @@ static char *safe_realloc( char **buf, int len )
 }
 #endif
 
+char * ldap_pvt_get_fqdn( char *name )
+{
+	char *fqdn, *ha_buf;
+	char hostbuf[MAXHOSTNAMELEN+1];
+	struct hostent *hp, he_buf;
+	int rc, local_h_errno;
+
+	if( name == NULL ) {
+		if( gethostname( hostbuf, MAXHOSTNAMELEN ) == 0 ) {
+			hostbuf[MAXHOSTNAMELEN] = '\0';
+			name = hostbuf;
+		} else {
+			name = "localhost";
+		}
+	}
+
+	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 );
+	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") },
+		{ EAI_SYSTEM, N_("System error") },
+		{ 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