Adding upstream version 3.4.23.upstream/3.4.23upstream

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

1 files changed, 1994 insertions, 0 deletions

diff --git a/src/global/dict_ldap.c b/src/global/dict_ldap.c
new file mode 100644
index 0000000..2efad14
--- /dev/null
+++ b/src/global/dict_ldap.c
@@ -0,0 +1,1994 @@
+/*++
+/* NAME
+/*	dict_ldap 3
+/* SUMMARY
+/*	dictionary manager interface to LDAP maps
+/* SYNOPSIS
+/*	#include <dict_ldap.h>
+/*
+/*	DICT    *dict_ldap_open(attribute, dummy, dict_flags)
+/*	const char *ldapsource;
+/*	int	dummy;
+/*	int	dict_flags;
+/* DESCRIPTION
+/*	dict_ldap_open() makes LDAP user information accessible via
+/*	the generic dictionary operations described in dict_open(3).
+/*
+/*	Arguments:
+/* .IP ldapsource
+/*	Either the path to the LDAP configuration file (if it starts
+/*	with '/' or '.'), or the prefix which will be used to obtain
+/*	configuration parameters for this search.
+/*
+/*	In the first case, the configuration variables below are
+/*	specified in the file as \fBname\fR=\fBvalue\fR pairs.
+/*
+/*	In the second case, the configuration variables are prefixed
+/*	with the value of \fIldapsource\fR and an underscore,
+/*	and they are specified in main.cf.  For example, if this
+/*	value is \fBldapone\fR, the variables would look like
+/*	\fBldapone_server_host\fR, \fBldapone_search_base\fR, and so on.
+/* .IP dummy
+/*	Not used; this argument exists only for compatibility with
+/*	the dict_open(3) interface.
+/* .PP
+/*	Configuration parameters:
+/* .IP server_host
+/*	List of hosts at which all LDAP queries are directed.
+/*	The host names can also be LDAP URLs if the LDAP client library used
+/*	is OpenLDAP.
+/* .IP server_port
+/*	The port the LDAP server listens on.
+/* .IP search_base
+/*	The LDAP search base, for example: \fIO=organization name, C=country\fR.
+/* .IP domain
+/*	If specified, only lookups ending in this value will be queried.
+/*	This can significantly reduce the query load on the LDAP server.
+/* .IP timeout
+/*	Deadline for LDAP open() and LDAP search() .
+/* .IP query_filter
+/*	The search filter template used to search for directory entries,
+/*	for example \fI(mailacceptinggeneralid=%s)\fR. See ldap_table(5)
+/*	for details.
+/* .IP result_format
+/*	The result template used to expand results from queries. Default
+/*	is \fI%s\fR. See ldap_table(5) for details. Also supported under
+/*	the name \fIresult_filter\fR for compatibility with older releases.
+/* .IP result_attribute
+/*	The attribute(s) returned by the search, in which to find
+/*	RFC822 addresses, for example \fImaildrop\fR.
+/* .IP special_result_attribute
+/*	The attribute(s) of directory entries that can contain DNs or URLs.
+/*	If found, a recursive subsequent search is done using their values.
+/* .IP leaf_result_attribute
+/*	These are only returned for "leaf" LDAP entries, i.e. those that are
+/*	not "terminal" and have no values for any of the "special" result
+/*	attributes.
+/* .IP terminal_result_attribute
+/*	If found, the LDAP entry is considered a terminal LDAP object, not
+/*	subject to further direct or recursive expansion. Only the terminal
+/*	result attributes are returned.
+/* .IP scope
+/*	LDAP search scope: sub, base, or one.
+/* .IP bind
+/*	Whether or not to bind to the server -- LDAP v3 implementations don't
+/*	require it, which saves some overhead.
+/* .IP bind_dn
+/*	If you must bind to the server, do it with this distinguished name ...
+/* .IP bind_pw
+/*	\&... and this password.
+/* .IP cache (no longer supported)
+/*	Whether or not to turn on client-side caching.
+/* .IP cache_expiry (no longer supported)
+/*	If you do cache results, expire them after this many seconds.
+/* .IP cache_size (no longer supported)
+/*	The cache size in bytes. Does nothing if the cache is off, of course.
+/* .IP recursion_limit
+/*	Maximum recursion depth when expanding DN or URL references.
+/*	Queries which exceed the recursion limit fail with
+/*	dict->error = DICT_ERR_RETRY.
+/* .IP expansion_limit
+/*	Limit (if any) on the total number of lookup result values. Lookups which
+/*	exceed the limit fail with dict->error=DICT_ERR_RETRY. Note that
+/*	each value of a multivalued result attribute counts as one result.
+/* .IP size_limit
+/*	Limit on the number of entries returned by individual LDAP queries.
+/*	Queries which exceed the limit fail with dict->error=DICT_ERR_RETRY.
+/*	This is an *entry* count, for any single query performed during the
+/*	possibly recursive lookup.
+/* .IP chase_referrals
+/*	Controls whether LDAP referrals are obeyed.
+/* .IP dereference
+/*	How to handle LDAP aliases. See ldap.h or ldap_open(3) man page.
+/* .IP version
+/*	Specifies the LDAP protocol version to use.  Default is version
+/*	\fI2\fR.
+/* .IP "\fBsasl_mechs (empty)\fR"
+/*	Specifies a space-separated list of LDAP SASL Mechanisms.
+/* .IP "\fBsasl_realm (empty)\fR"
+/*	The realm to use for SASL binds.
+/* .IP "\fBsasl_authz_id (empty)\fR"
+/*	The SASL Authorization Identity to assert.
+/* .IP "\fBsasl_minssf (0)\fR"
+/*	The minimum SASL SSF to allow.
+/* .IP start_tls
+/*	Whether or not to issue STARTTLS upon connection to the server.
+/*	At this time, STARTTLS and LDAP SSL are only available if the
+/*	LDAP client library used is OpenLDAP.  Default is \fIno\fR.
+/* .IP tls_ca_cert_file
+/*	File containing certificates for all of the X509 Certification
+/*	Authorities the client will recognize.  Takes precedence over
+/*	tls_ca_cert_dir.
+/* .IP tls_ca_cert_dir
+/*	Directory containing X509 Certification Authority certificates
+/*	in separate individual files.
+/* .IP tls_cert
+/*	File containing client's X509 certificate.
+/* .IP tls_key
+/*	File containing the private key corresponding to
+/*	tls_cert.
+/* .IP tls_require_cert
+/*	Whether or not to request server's X509 certificate and check its
+/*	validity. The value "no" means don't check the cert trust chain
+/*	and (OpenLDAP 2.1+) don't check the peername. The value "yes" means
+/*	check both the trust chain and the peername (with OpenLDAP <= 2.0.11,
+/*	the peername checks use the reverse hostname from the LDAP servers's
+/*	IP address, not the user supplied servername).
+/* .IP tls_random_file
+/*	Path of a file to obtain random bits from when /dev/[u]random is
+/*	not available. Generally set to the name of the EGD/PRNGD socket.
+/* .IP tls_cipher_suite
+/*	Cipher suite to use in SSL/TLS negotiations.
+/* .IP debuglevel
+/*	Debug level.  See 'loglevel' option in slapd.conf(5) man page.
+/*	Currently only in openldap libraries (and derivatives).
+/* SEE ALSO
+/*	dict(3) generic dictionary manager
+/* AUTHOR(S)
+/*	Prabhat K Singh
+/*	VSNL, Bombay, India.
+/*	prabhat@giasbm01.vsnl.net.in
+/*
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*
+/*	Wietse Venema
+/*	Google, Inc.
+/*	111 8th Avenue
+/*	New York, NY 10011, USA
+/*
+/*	John Hensley
+/*	john@sunislelodge.com
+/*
+/*	Current maintainers:
+/*
+/*	LaMont Jones
+/*	lamont@debian.org
+/*
+/*	Victor Duchovni
+/*	Morgan Stanley
+/*	New York, USA
+/*
+/*	Liviu Daia
+/*	Institute of Mathematics of the Romanian Academy
+/*	P.O. BOX 1-764
+/*	RO-014700 Bucharest, ROMANIA
+/*--*/
+
+/* System library. */
+
+#include "sys_defs.h"
+
+#ifdef HAS_LDAP
+
+#include <sys/time.h>
+#include <stdio.h>
+#include <signal.h>
+#include <setjmp.h>
+#include <stdlib.h>
+#include <lber.h>
+#include <ldap.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+
+#ifdef STRCASECMP_IN_STRINGS_H
+#include <strings.h>
+#endif
+
+ /*
+  * Older APIs have weird memory freeing behavior.
+  */
+#if !defined(LDAP_API_VERSION) || (LDAP_API_VERSION < 2000)
+#error "Your LDAP version is too old"
+#endif
+
+/* Handle differences between LDAP SDK's constant definitions */
+#ifndef LDAP_CONST
+#define LDAP_CONST const
+#endif
+#ifndef LDAP_OPT_SUCCESS
+#define LDAP_OPT_SUCCESS 0
+#endif
+
+/* Utility library. */
+
+#include <msg.h>
+#include <mymalloc.h>
+#include <vstring.h>
+#include <dict.h>
+#include <stringops.h>
+#include <binhash.h>
+#include <name_code.h>
+
+/* Global library. */
+
+#include "cfg_parser.h"
+#include "db_common.h"
+#include "mail_conf.h"
+
+#if defined(USE_LDAP_SASL) && defined(LDAP_API_FEATURE_X_OPENLDAP)
+
+ /*
+  * SASL headers, for sasl_interact_t. Either SASL v1 or v2 should be fine.
+  */
+#include <sasl.h>
+#endif
+
+/* Application-specific. */
+
+#include "dict_ldap.h"
+
+#define DICT_LDAP_BIND_NONE	0
+#define DICT_LDAP_BIND_SIMPLE	1
+#define DICT_LDAP_BIND_SASL	2
+#define DICT_LDAP_DO_BIND(d)	((d)->bind != DICT_LDAP_BIND_NONE)
+#define DICT_LDAP_DO_SASL(d)	((d)->bind == DICT_LDAP_BIND_SASL)
+
+static const NAME_CODE bindopt_table[] = {
+    CONFIG_BOOL_NO, DICT_LDAP_BIND_NONE,
+    "none", DICT_LDAP_BIND_NONE,
+    CONFIG_BOOL_YES, DICT_LDAP_BIND_SIMPLE,
+    "simple", DICT_LDAP_BIND_SIMPLE,
+#ifdef LDAP_API_FEATURE_X_OPENLDAP
+#if defined(USE_LDAP_SASL)
+    "sasl", DICT_LDAP_BIND_SASL,
+#endif
+#endif
+    0, -1,
+};
+
+typedef struct {
+    LDAP   *conn_ld;
+    int     conn_refcount;
+} LDAP_CONN;
+
+/*
+ * Structure containing all the configuration parameters for a given
+ * LDAP source, plus its connection handle.
+ */
+typedef struct {
+    DICT    dict;			/* generic member */
+    CFG_PARSER *parser;			/* common parameter parser */
+    char   *query;			/* db_common_expand() query */
+    char   *result_format;		/* db_common_expand() result_format */
+    void   *ctx;			/* db_common_parse() context */
+    int     dynamic_base;		/* Search base has substitutions? */
+    int     expansion_limit;
+    char   *server_host;
+    int     server_port;
+    int     scope;
+    char   *search_base;
+    ARGV   *result_attributes;
+    int     num_terminal;		/* Number of terminal attributes. */
+    int     num_leaf;			/* Number of leaf attributes */
+    int     num_attributes;		/* Combined # of non-special attrs */
+    int     bind;
+    char   *bind_dn;
+    char   *bind_pw;
+    int     timeout;
+    int     dereference;
+    long    recursion_limit;
+    long    size_limit;
+    int     chase_referrals;
+    int     debuglevel;
+    int     version;
+#ifdef LDAP_API_FEATURE_X_OPENLDAP
+#if defined(USE_LDAP_SASL)
+    int     sasl;
+    char   *sasl_mechs;
+    char   *sasl_realm;
+    char   *sasl_authz;
+    int     sasl_minssf;
+#endif
+    int     ldap_ssl;
+    int     start_tls;
+    int     tls_require_cert;
+    char   *tls_ca_cert_file;
+    char   *tls_ca_cert_dir;
+    char   *tls_cert;
+    char   *tls_key;
+    char   *tls_random_file;
+    char   *tls_cipher_suite;
+#endif
+    BINHASH_INFO *ht;			/* hash entry for LDAP connection */
+    LDAP   *ld;				/* duplicated from conn->conn_ld */
+} DICT_LDAP;
+
+#define DICT_LDAP_CONN(d) ((LDAP_CONN *)((d)->ht->value))
+
+#define DICT_LDAP_UNBIND_RETURN(__ld, __err, __ret) do { \
+	dict_ldap_unbind(__ld); \
+	(__ld) = 0; \
+	dict_ldap->dict.error = (__err); \
+	return ((__ret)); \
+    } while (0)
+
+ /*
+  * Bitrot: LDAP_API 3000 and up (OpenLDAP 2.2.x) deprecated ldap_unbind()
+  */
+#if LDAP_API_VERSION >= 3000
+#define dict_ldap_unbind(ld)		ldap_unbind_ext((ld), 0, 0)
+#define dict_ldap_abandon(ld, msg)	ldap_abandon_ext((ld), (msg), 0, 0)
+#else
+#define dict_ldap_unbind(ld)		ldap_unbind(ld)
+#define dict_ldap_abandon(ld, msg)	ldap_abandon((ld), (msg))
+#endif
+
+static int dict_ldap_vendor_version(void)
+{
+    const char *myname = "dict_ldap_api_info";
+    LDAPAPIInfo api;
+
+    /*
+     * We tell the library our version, and it tells us its version and/or
+     * may return an error code if the versions are not the same.
+     */
+    api.ldapai_info_version = LDAP_API_INFO_VERSION;
+    if (ldap_get_option(0, LDAP_OPT_API_INFO, &api) != LDAP_SUCCESS
+	|| api.ldapai_info_version != LDAP_API_INFO_VERSION) {
+	if (api.ldapai_info_version != LDAP_API_INFO_VERSION)
+	    msg_fatal("%s: run-time API_INFO version: %d, compiled with: %d",
+		    myname, api.ldapai_info_version, LDAP_API_INFO_VERSION);
+	else
+	    msg_fatal("%s: ldap_get_option(API_INFO) failed", myname);
+    }
+    if (strcmp(api.ldapai_vendor_name, LDAP_VENDOR_NAME) != 0)
+	msg_fatal("%s: run-time API vendor: %s, compiled with: %s",
+		  myname, api.ldapai_vendor_name, LDAP_VENDOR_NAME);
+
+    return (api.ldapai_vendor_version);
+}
+
+/*
+ * Quoting rules.
+ */
+
+/* rfc2253_quote - Quote input key for safe inclusion in the search base */
+
+static void rfc2253_quote(DICT *unused, const char *name, VSTRING *result)
+{
+    const char *sub = name;
+    size_t  len;
+
+    /*
+     * The RFC only requires quoting of a leading or trailing space, but it
+     * is harmless to quote whitespace everywhere. Similarly, we quote all
+     * '#' characters, even though only the leading '#' character requires
+     * quoting per the RFC.
+     */
+    while (*sub)
+	if ((len = strcspn(sub, " \t\"#+,;<>\\")) > 0) {
+	    vstring_strncat(result, sub, len);
+	    sub += len;
+	} else
+	    vstring_sprintf_append(result, "\\%02X",
+				   *((const unsigned char *) sub++));
+}
+
+/* rfc2254_quote - Quote input key for safe inclusion in the query filter */
+
+static void rfc2254_quote(DICT *unused, const char *name, VSTRING *result)
+{
+    const char *sub = name;
+    size_t  len;
+
+    /*
+     * If any characters in the supplied address should be escaped per RFC
+     * 2254, do so. Thanks to Keith Stevenson and Wietse. And thanks to
+     * Samuel Tardieu for spotting that wildcard searches were being done in
+     * the first place, which prompted the ill-conceived lookup_wildcards
+     * parameter and then this more comprehensive mechanism.
+     */
+    while (*sub)
+	if ((len = strcspn(sub, "*()\\")) > 0) {
+	    vstring_strncat(result, sub, len);
+	    sub += len;
+	} else
+	    vstring_sprintf_append(result, "\\%02X",
+				   *((const unsigned char *) sub++));
+}
+
+static BINHASH *conn_hash = 0;
+
+#if defined(LDAP_API_FEATURE_X_OPENLDAP) || !defined(LDAP_OPT_NETWORK_TIMEOUT)
+/*
+ * LDAP connection timeout support.
+ */
+static jmp_buf env;
+
+static void dict_ldap_timeout(int unused_sig)
+{
+    longjmp(env, 1);
+}
+
+#endif
+
+static void dict_ldap_logprint(LDAP_CONST char *data)
+{
+    const char *myname = "dict_ldap_debug";
+    char   *buf, *p;
+
+    buf = mystrdup(data);
+    if (*buf) {
+	p = buf + strlen(buf) - 1;
+	while (p - buf >= 0 && ISSPACE(*p))
+	    *p-- = 0;
+    }
+    msg_info("%s: %s", myname, buf);
+    myfree(buf);
+}
+
+static int dict_ldap_get_errno(LDAP *ld)
+{
+    int     rc;
+
+    if (ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &rc) != LDAP_OPT_SUCCESS)
+	rc = LDAP_OTHER;
+    return rc;
+}
+
+static int dict_ldap_set_errno(LDAP *ld, int rc)
+{
+    (void) ldap_set_option(ld, LDAP_OPT_ERROR_NUMBER, &rc);
+    return rc;
+}
+
+#if defined(USE_LDAP_SASL) && defined(LDAP_API_FEATURE_X_OPENLDAP)
+
+ /*
+  * Context structure for SASL property callback.
+  */
+typedef struct bind_props {
+    char   *authcid;
+    char   *passwd;
+    char   *realm;
+    char   *authzid;
+} bind_props;
+
+static int ldap_b2_interact(LDAP *ld, unsigned flags, void *props, void *inter)
+{
+
+    sasl_interact_t *in;
+    bind_props *ctx = (bind_props *) props;
+
+    for (in = inter; in->id != SASL_CB_LIST_END; in++) {
+	in->result = NULL;
+	switch (in->id) {
+	case SASL_CB_GETREALM:
+	    in->result = ctx->realm;
+	    break;
+	case SASL_CB_AUTHNAME:
+	    in->result = ctx->authcid;
+	    break;
+	case SASL_CB_USER:
+	    in->result = ctx->authzid;
+	    break;
+	case SASL_CB_PASS:
+	    in->result = ctx->passwd;
+	    break;
+	}
+	if (in->result)
+	    in->len = strlen(in->result);
+    }
+    return LDAP_SUCCESS;
+}
+
+#endif
+
+/* dict_ldap_result - Read and parse LDAP result */
+
+static int dict_ldap_result(LDAP *ld, int msgid, int timeout, LDAPMessage **res)
+{
+    struct timeval mytimeval;
+    int     err;
+
+    mytimeval.tv_sec = timeout;
+    mytimeval.tv_usec = 0;
+
+#define GET_ALL 1
+    if (ldap_result(ld, msgid, GET_ALL, &mytimeval, res) == -1)
+	return (dict_ldap_get_errno(ld));
+
+    if ((err = dict_ldap_get_errno(ld)) != LDAP_SUCCESS) {
+	if (err == LDAP_TIMEOUT) {
+	    (void) dict_ldap_abandon(ld, msgid);
+	    return (dict_ldap_set_errno(ld, LDAP_TIMEOUT));
+	}
+	return err;
+    }
+    return LDAP_SUCCESS;
+}
+
+#if defined(USE_LDAP_SASL) && defined(LDAP_API_FEATURE_X_OPENLDAP)
+
+/* Asynchronous SASL auth if SASL is enabled */
+
+static int dict_ldap_bind_sasl(DICT_LDAP *dict_ldap)
+{
+    int     rc;
+    bind_props props;
+    static VSTRING *minssf = 0;
+
+    if (minssf == 0)
+	minssf = vstring_alloc(12);
+
+    vstring_sprintf(minssf, "minssf=%d", dict_ldap->sasl_minssf);
+
+    if ((rc = ldap_set_option(dict_ldap->ld, LDAP_OPT_X_SASL_SECPROPS,
+			      (char *) minssf)) != LDAP_OPT_SUCCESS)
+	return (rc);
+
+    props.authcid = dict_ldap->bind_dn;
+    props.passwd = dict_ldap->bind_pw;
+    props.realm = dict_ldap->sasl_realm;
+    props.authzid = dict_ldap->sasl_authz;
+
+    if ((rc = ldap_sasl_interactive_bind_s(dict_ldap->ld, NULL,
+					   dict_ldap->sasl_mechs, NULL, NULL,
+					   LDAP_SASL_QUIET, ldap_b2_interact,
+					   &props)) != LDAP_SUCCESS)
+	return (rc);
+
+    return (LDAP_SUCCESS);
+}
+
+#endif
+
+/* dict_ldap_bind_st - Synchronous simple auth with timeout */
+
+static int dict_ldap_bind_st(DICT_LDAP *dict_ldap)
+{
+    int     rc;
+    int     err = LDAP_SUCCESS;
+    int     msgid;
+    LDAPMessage *res;
+    struct berval cred;
+
+    cred.bv_val = dict_ldap->bind_pw;
+    cred.bv_len = strlen(cred.bv_val);
+    if ((rc = ldap_sasl_bind(dict_ldap->ld, dict_ldap->bind_dn,
+			     LDAP_SASL_SIMPLE, &cred,
+			     0, 0, &msgid)) != LDAP_SUCCESS)
+	return (rc);
+    if ((rc = dict_ldap_result(dict_ldap->ld, msgid, dict_ldap->timeout,
+			       &res)) != LDAP_SUCCESS)
+	return (rc);
+
+#define FREE_RESULT 1
+    rc = ldap_parse_result(dict_ldap->ld, res, &err, 0, 0, 0, 0, FREE_RESULT);
+    return (rc == LDAP_SUCCESS ? err : rc);
+}
+
+/* search_st - Synchronous search with timeout */
+
+static int search_st(LDAP *ld, char *base, int scope, char *query,
+		             char **attrs, int timeout, LDAPMessage **res)
+{
+    struct timeval mytimeval;
+    int     msgid;
+    int     rc;
+    int     err;
+
+    mytimeval.tv_sec = timeout;
+    mytimeval.tv_usec = 0;
+
+#define WANTVALS 0
+#define USE_SIZE_LIM_OPT -1			/* Any negative value will do */
+
+    if ((rc = ldap_search_ext(ld, base, scope, query, attrs, WANTVALS, 0, 0,
+			      &mytimeval, USE_SIZE_LIM_OPT,
+			      &msgid)) != LDAP_SUCCESS)
+	return rc;
+
+    if ((rc = dict_ldap_result(ld, msgid, timeout, res)) != LDAP_SUCCESS)
+	return (rc);
+
+#define DONT_FREE_RESULT 0
+    rc = ldap_parse_result(ld, *res, &err, 0, 0, 0, 0, DONT_FREE_RESULT);
+    return (err != LDAP_SUCCESS ? err : rc);
+}
+
+#ifdef LDAP_API_FEATURE_X_OPENLDAP
+static int dict_ldap_set_tls_options(DICT_LDAP *dict_ldap)
+{
+    const char *myname = "dict_ldap_set_tls_options";
+    int     rc;
+
+#ifdef LDAP_OPT_X_TLS_NEWCTX
+    int     am_server = 0;
+    LDAP   *ld = dict_ldap->ld;
+
+#else
+    LDAP   *ld = 0;
+
+#endif
+
+    if (dict_ldap->start_tls || dict_ldap->ldap_ssl) {
+	if (*dict_ldap->tls_random_file) {
+	    if ((rc = ldap_set_option(ld, LDAP_OPT_X_TLS_RANDOM_FILE,
+			     dict_ldap->tls_random_file)) != LDAP_SUCCESS) {
+		msg_warn("%s: Unable to set tls_random_file to %s: %d: %s",
+			 myname, dict_ldap->tls_random_file,
+			 rc, ldap_err2string(rc));
+		return (-1);
+	    }
+	}
+	if (*dict_ldap->tls_ca_cert_file) {
+	    if ((rc = ldap_set_option(ld, LDAP_OPT_X_TLS_CACERTFILE,
+			    dict_ldap->tls_ca_cert_file)) != LDAP_SUCCESS) {
+		msg_warn("%s: Unable to set tls_ca_cert_file to %s: %d: %s",
+			 myname, dict_ldap->tls_ca_cert_file,
+			 rc, ldap_err2string(rc));
+		return (-1);
+	    }
+	}
+	if (*dict_ldap->tls_ca_cert_dir) {
+	    if ((rc = ldap_set_option(ld, LDAP_OPT_X_TLS_CACERTDIR,
+			     dict_ldap->tls_ca_cert_dir)) != LDAP_SUCCESS) {
+		msg_warn("%s: Unable to set tls_ca_cert_dir to %s: %d: %s",
+			 myname, dict_ldap->tls_ca_cert_dir,
+			 rc, ldap_err2string(rc));
+		return (-1);
+	    }
+	}
+	if (*dict_ldap->tls_cert) {
+	    if ((rc = ldap_set_option(ld, LDAP_OPT_X_TLS_CERTFILE,
+				    dict_ldap->tls_cert)) != LDAP_SUCCESS) {
+		msg_warn("%s: Unable to set tls_cert to %s: %d: %s",
+			 myname, dict_ldap->tls_cert,
+			 rc, ldap_err2string(rc));
+		return (-1);
+	    }
+	}
+	if (*dict_ldap->tls_key) {
+	    if ((rc = ldap_set_option(ld, LDAP_OPT_X_TLS_KEYFILE,
+				      dict_ldap->tls_key)) != LDAP_SUCCESS) {
+		msg_warn("%s: Unable to set tls_key to %s: %d: %s",
+			 myname, dict_ldap->tls_key,
+			 rc, ldap_err2string(rc));
+		return (-1);
+	    }
+	}
+	if (*dict_ldap->tls_cipher_suite) {
+	    if ((rc = ldap_set_option(ld, LDAP_OPT_X_TLS_CIPHER_SUITE,
+			    dict_ldap->tls_cipher_suite)) != LDAP_SUCCESS) {
+		msg_warn("%s: Unable to set tls_cipher_suite to %s: %d: %s",
+			 myname, dict_ldap->tls_cipher_suite,
+			 rc, ldap_err2string(rc));
+		return (-1);
+	    }
+	}
+	if ((rc = ldap_set_option(ld, LDAP_OPT_X_TLS_REQUIRE_CERT,
+			 &(dict_ldap->tls_require_cert))) != LDAP_SUCCESS) {
+	    msg_warn("%s: Unable to set tls_require_cert to %d: %d: %s",
+		     myname, dict_ldap->tls_require_cert,
+		     rc, ldap_err2string(rc));
+	    return (-1);
+	}
+#ifdef LDAP_OPT_X_TLS_NEWCTX
+	if ((rc = ldap_set_option(ld, LDAP_OPT_X_TLS_NEWCTX, &am_server))
+	    != LDAP_SUCCESS) {
+	    msg_warn("%s: Unable to allocate new TLS context %d: %s",
+		     myname, rc, ldap_err2string(rc));
+	    return (-1);
+	}
+#endif
+    }
+    return (0);
+}
+
+#endif
+
+/* Establish a connection to the LDAP server. */
+static int dict_ldap_connect(DICT_LDAP *dict_ldap)
+{
+    const char *myname = "dict_ldap_connect";
+    int     rc = 0;
+
+#ifdef LDAP_OPT_NETWORK_TIMEOUT
+    struct timeval mytimeval;
+
+#endif
+
+#if defined(LDAP_API_FEATURE_X_OPENLDAP) || !defined(LDAP_OPT_NETWORK_TIMEOUT)
+    void    (*saved_alarm) (int);
+
+#endif
+
+#if defined(LDAP_OPT_DEBUG_LEVEL) && defined(LBER_OPT_LOG_PRINT_FN)
+    if (dict_ldap->debuglevel > 0 &&
+	ber_set_option(NULL, LBER_OPT_LOG_PRINT_FN,
+		(LDAP_CONST void *) dict_ldap_logprint) != LBER_OPT_SUCCESS)
+	msg_warn("%s: Unable to set ber logprint function.", myname);
+#if defined(LBER_OPT_DEBUG_LEVEL)
+    if (ber_set_option(NULL, LBER_OPT_DEBUG_LEVEL,
+		       &(dict_ldap->debuglevel)) != LBER_OPT_SUCCESS)
+	msg_warn("%s: Unable to set BER debug level.", myname);
+#endif
+    if (ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL,
+			&(dict_ldap->debuglevel)) != LDAP_OPT_SUCCESS)
+	msg_warn("%s: Unable to set LDAP debug level.", myname);
+#endif
+
+    dict_ldap->dict.error = 0;
+
+    if (msg_verbose)
+	msg_info("%s: Connecting to server %s", myname,
+		 dict_ldap->server_host);
+
+#ifdef LDAP_OPT_NETWORK_TIMEOUT
+#ifdef LDAP_API_FEATURE_X_OPENLDAP
+    ldap_initialize(&(dict_ldap->ld), dict_ldap->server_host);
+#else
+    dict_ldap->ld = ldap_init(dict_ldap->server_host,
+			      (int) dict_ldap->server_port);
+#endif
+    if (dict_ldap->ld == NULL) {
+	msg_warn("%s: Unable to init LDAP server %s",
+		 myname, dict_ldap->server_host);
+	dict_ldap->dict.error = DICT_ERR_RETRY;
+	return (-1);
+    }
+    mytimeval.tv_sec = dict_ldap->timeout;
+    mytimeval.tv_usec = 0;
+    if (ldap_set_option(dict_ldap->ld, LDAP_OPT_NETWORK_TIMEOUT, &mytimeval) !=
+	LDAP_OPT_SUCCESS) {
+	msg_warn("%s: Unable to set network timeout.", myname);
+	DICT_LDAP_UNBIND_RETURN(dict_ldap->ld, DICT_ERR_RETRY, -1);
+    }
+#else
+    if ((saved_alarm = signal(SIGALRM, dict_ldap_timeout)) == SIG_ERR) {
+	msg_warn("%s: Error setting signal handler for open timeout: %m",
+		 myname);
+	dict_ldap->dict.error = DICT_ERR_RETRY;
+	return (-1);
+    }
+    alarm(dict_ldap->timeout);
+    if (setjmp(env) == 0)
+	dict_ldap->ld = ldap_open(dict_ldap->server_host,
+				  (int) dict_ldap->server_port);
+    else
+	dict_ldap->ld = 0;
+    alarm(0);
+
+    if (signal(SIGALRM, saved_alarm) == SIG_ERR) {
+	msg_warn("%s: Error resetting signal handler after open: %m",
+		 myname);
+	dict_ldap->dict.error = DICT_ERR_RETRY;
+	return (-1);
+    }
+    if (dict_ldap->ld == NULL) {
+	msg_warn("%s: Unable to connect to LDAP server %s",
+		 myname, dict_ldap->server_host);
+	dict_ldap->dict.error = DICT_ERR_RETRY;
+	return (-1);
+    }
+#endif
+
+    /*
+     * v3 support is needed for referral chasing.  Thanks to Sami Haahtinen
+     * for the patch.
+     */
+#ifdef LDAP_OPT_PROTOCOL_VERSION
+    if (ldap_set_option(dict_ldap->ld, LDAP_OPT_PROTOCOL_VERSION,
+			&dict_ldap->version) != LDAP_OPT_SUCCESS) {
+	msg_warn("%s: Unable to set LDAP protocol version", myname);
+	DICT_LDAP_UNBIND_RETURN(dict_ldap->ld, DICT_ERR_RETRY, -1);
+    }
+    if (msg_verbose) {
+	if (ldap_get_option(dict_ldap->ld,
+			    LDAP_OPT_PROTOCOL_VERSION,
+			    &dict_ldap->version) != LDAP_OPT_SUCCESS)
+	    msg_warn("%s: Unable to get LDAP protocol version", myname);
+	else
+	    msg_info("%s: Actual Protocol version used is %d.",
+		     myname, dict_ldap->version);
+    }
+#endif
+
+    /*
+     * Limit the number of entries returned by each query.
+     */
+    if (dict_ldap->size_limit) {
+	if (ldap_set_option(dict_ldap->ld, LDAP_OPT_SIZELIMIT,
+			    &dict_ldap->size_limit) != LDAP_OPT_SUCCESS) {
+	    msg_warn("%s: %s: Unable to set query result size limit to %ld.",
+		     myname, dict_ldap->parser->name, dict_ldap->size_limit);
+	    DICT_LDAP_UNBIND_RETURN(dict_ldap->ld, DICT_ERR_RETRY, -1);
+	}
+    }
+
+    /*
+     * Configure alias dereferencing for this connection. Thanks to Mike
+     * Mattice for this, and to Hery Rakotoarisoa for the v3 update.
+     */
+    if (ldap_set_option(dict_ldap->ld, LDAP_OPT_DEREF,
+			&(dict_ldap->dereference)) != LDAP_OPT_SUCCESS)
+	msg_warn("%s: Unable to set dereference option.", myname);
+
+    /* Chase referrals. */
+
+#ifdef LDAP_OPT_REFERRALS
+    if (ldap_set_option(dict_ldap->ld, LDAP_OPT_REFERRALS,
+		    dict_ldap->chase_referrals ? LDAP_OPT_ON : LDAP_OPT_OFF)
+	!= LDAP_OPT_SUCCESS) {
+	msg_warn("%s: Unable to set Referral chasing.", myname);
+	DICT_LDAP_UNBIND_RETURN(dict_ldap->ld, DICT_ERR_RETRY, -1);
+    }
+#else
+    if (dict_ldap->chase_referrals) {
+	msg_warn("%s: Unable to set Referral chasing.", myname);
+    }
+#endif
+
+#ifdef LDAP_API_FEATURE_X_OPENLDAP
+    if (dict_ldap_set_tls_options(dict_ldap) != 0)
+	DICT_LDAP_UNBIND_RETURN(dict_ldap->ld, DICT_ERR_RETRY, -1);
+    if (dict_ldap->start_tls) {
+	if ((saved_alarm = signal(SIGALRM, dict_ldap_timeout)) == SIG_ERR) {
+	    msg_warn("%s: Error setting signal handler for STARTTLS timeout: %m",
+		     myname);
+	    DICT_LDAP_UNBIND_RETURN(dict_ldap->ld, DICT_ERR_RETRY, -1);
+	}
+	alarm(dict_ldap->timeout);
+	if (setjmp(env) == 0)
+	    rc = ldap_start_tls_s(dict_ldap->ld, NULL, NULL);
+	else {
+	    rc = LDAP_TIMEOUT;
+	    dict_ldap->ld = 0;			/* Unknown state after
+						 * longjmp() */
+	}
+	alarm(0);
+
+	if (signal(SIGALRM, saved_alarm) == SIG_ERR) {
+	    msg_warn("%s: Error resetting signal handler after STARTTLS: %m",
+		     myname);
+	    dict_ldap->dict.error = DICT_ERR_RETRY;
+	    return (-1);
+	}
+	if (rc != LDAP_SUCCESS) {
+	    msg_error("%s: Unable to set STARTTLS: %d: %s", myname,
+		      rc, ldap_err2string(rc));
+	    dict_ldap->dict.error = DICT_ERR_RETRY;
+	    return (-1);
+	}
+    }
+#endif
+
+#define DN_LOG_VAL(dict_ldap) \
+	((dict_ldap)->bind_dn[0] ? (dict_ldap)->bind_dn : "empty or implicit")
+
+    /*
+     * If this server requires a bind, do so. Thanks to Sam Tardieu for
+     * noticing that the original bind call was broken.
+     */
+    if (DICT_LDAP_DO_BIND(dict_ldap)) {
+	if (msg_verbose)
+	    msg_info("%s: Binding to server %s with dn %s",
+		     myname, dict_ldap->server_host, DN_LOG_VAL(dict_ldap));
+
+#if defined(USE_LDAP_SASL) && defined(LDAP_API_FEATURE_X_OPENLDAP)
+	if (DICT_LDAP_DO_SASL(dict_ldap)) {
+	    rc = dict_ldap_bind_sasl(dict_ldap);
+	} else {
+	    rc = dict_ldap_bind_st(dict_ldap);
+	}
+#else
+	rc = dict_ldap_bind_st(dict_ldap);
+#endif
+
+	if (rc != LDAP_SUCCESS) {
+	    msg_warn("%s: Unable to bind to server %s with dn %s: %d (%s)",
+		     myname, dict_ldap->server_host, DN_LOG_VAL(dict_ldap),
+		     rc, ldap_err2string(rc));
+	    DICT_LDAP_UNBIND_RETURN(dict_ldap->ld, DICT_ERR_RETRY, -1);
+	}
+	if (msg_verbose)
+	    msg_info("%s: Successful bind to server %s with dn %s",
+		     myname, dict_ldap->server_host, DN_LOG_VAL(dict_ldap));
+    }
+    /* Save connection handle in shared container */
+    DICT_LDAP_CONN(dict_ldap)->conn_ld = dict_ldap->ld;
+
+    if (msg_verbose)
+	msg_info("%s: Cached connection handle for LDAP source %s",
+		 myname, dict_ldap->parser->name);
+
+    return (0);
+}
+
+/*
+ * Locate or allocate connection cache entry.
+ */
+static void dict_ldap_conn_find(DICT_LDAP *dict_ldap)
+{
+    VSTRING *keybuf = vstring_alloc(10);
+    char   *key;
+    int     len;
+
+#ifdef LDAP_API_FEATURE_X_OPENLDAP
+    int     sslon = dict_ldap->start_tls || dict_ldap->ldap_ssl;
+
+#endif
+    LDAP_CONN *conn;
+
+    /*
+     * Join key fields with null characters.
+     */
+#define ADDSTR(vp, s) vstring_memcat((vp), (s), strlen((s))+1)
+#define ADDINT(vp, i) vstring_sprintf_append((vp), "%lu%c", (unsigned long)(i), 0)
+
+    ADDSTR(keybuf, dict_ldap->server_host);
+    ADDINT(keybuf, dict_ldap->server_port);
+    ADDINT(keybuf, dict_ldap->bind);
+    ADDSTR(keybuf, DICT_LDAP_DO_BIND(dict_ldap) ? dict_ldap->bind_dn : "");
+    ADDSTR(keybuf, DICT_LDAP_DO_BIND(dict_ldap) ? dict_ldap->bind_pw : "");
+    ADDINT(keybuf, dict_ldap->dereference);
+    ADDINT(keybuf, dict_ldap->chase_referrals);
+    ADDINT(keybuf, dict_ldap->debuglevel);
+    ADDINT(keybuf, dict_ldap->version);
+#ifdef LDAP_API_FEATURE_X_OPENLDAP
+#if defined(USE_LDAP_SASL)
+    ADDSTR(keybuf, DICT_LDAP_DO_SASL(dict_ldap) ? dict_ldap->sasl_mechs : "");
+    ADDSTR(keybuf, DICT_LDAP_DO_SASL(dict_ldap) ? dict_ldap->sasl_realm : "");
+    ADDSTR(keybuf, DICT_LDAP_DO_SASL(dict_ldap) ? dict_ldap->sasl_authz : "");
+    ADDINT(keybuf, DICT_LDAP_DO_SASL(dict_ldap) ? dict_ldap->sasl_minssf : 0);
+#endif
+    ADDINT(keybuf, dict_ldap->ldap_ssl);
+    ADDINT(keybuf, dict_ldap->start_tls);
+    ADDINT(keybuf, sslon ? dict_ldap->tls_require_cert : 0);
+    ADDSTR(keybuf, sslon ? dict_ldap->tls_ca_cert_file : "");
+    ADDSTR(keybuf, sslon ? dict_ldap->tls_ca_cert_dir : "");
+    ADDSTR(keybuf, sslon ? dict_ldap->tls_cert : "");
+    ADDSTR(keybuf, sslon ? dict_ldap->tls_key : "");
+    ADDSTR(keybuf, sslon ? dict_ldap->tls_random_file : "");
+    ADDSTR(keybuf, sslon ? dict_ldap->tls_cipher_suite : "");
+#endif
+
+    key = vstring_str(keybuf);
+    len = VSTRING_LEN(keybuf);
+
+    if (conn_hash == 0)
+	conn_hash = binhash_create(0);
+
+    if ((dict_ldap->ht = binhash_locate(conn_hash, key, len)) == 0) {
+	conn = (LDAP_CONN *) mymalloc(sizeof(LDAP_CONN));
+	conn->conn_ld = 0;
+	conn->conn_refcount = 0;
+	dict_ldap->ht = binhash_enter(conn_hash, key, len, (void *) conn);
+    }
+    ++DICT_LDAP_CONN(dict_ldap)->conn_refcount;
+
+    vstring_free(keybuf);
+}
+
+/* attr_sub_type - Is one of two attributes a sub-type of another */
+
+static int attrdesc_subtype(const char *a1, const char *a2)
+{
+
+    /*
+     * RFC 2251 section 4.1.4: LDAP attribute names are case insensitive
+     */
+    while (*a1 && TOLOWER(*a1) == TOLOWER(*a2))
+	++a1, ++a2;
+
+    /*
+     * Names equal to end of a1, is a2 equal or a subtype?
+     */
+    if (*a1 == 0 && (*a2 == 0 || *a2 == ';'))
+	return (1);
+
+    /*
+     * Names equal to end of a2, is a1 a subtype?
+     */
+    if (*a2 == 0 && *a1 == ';')
+	return (-1);
+
+    /*
+     * Distinct attributes
+     */
+    return (0);
+}
+
+/* url_attrs - attributes we want from LDAP URL */
+
+static char **url_attrs(DICT_LDAP *dict_ldap, LDAPURLDesc * url)
+{
+    static ARGV *attrs;
+    char  **a1;
+    char  **a2;
+    int     arel;
+
+    /*
+     * If the LDAP URI specified no attributes, all entry attributes are
+     * returned, leading to unnecessarily large LDAP results, particularly
+     * since dynamic groups are most useful for large groups.
+     * 
+     * Since we only make use of the various mumble_results attributes, we ask
+     * only for these, thus making large queries much faster.
+     * 
+     * In one test case, a query returning 75K users took 16 minutes when all
+     * attributes are returned, and just under 3 minutes with only the
+     * desired result attribute.
+     */
+    if (url->lud_attrs == 0 || *url->lud_attrs == 0)
+	return (dict_ldap->result_attributes->argv);
+
+    /*
+     * When the LDAP URI explicitly specifies a set of attributes, we use the
+     * interection of the URI attributes and our result attributes. This way
+     * LDAP URIs can hide certain attributes that should not be part of the
+     * query. There is no point in retrieving attributes not listed in our
+     * result set, we won't make any use of those.
+     */
+    if (attrs)
+	argv_truncate(attrs, 0);
+    else
+	attrs = argv_alloc(2);
+
+    /*
+     * Retrieve only those attributes that are of interest to us.
+     * 
+     * If the URL attribute and the attribute we want differ only in the
+     * "options" part of the attribute descriptor, select the more specific
+     * attribute descriptor.
+     */
+    for (a1 = url->lud_attrs; *a1; ++a1) {
+	for (a2 = dict_ldap->result_attributes->argv; *a2; ++a2) {
+	    arel = attrdesc_subtype(*a1, *a2);
+	    if (arel > 0)
+		argv_add(attrs, *a2, ARGV_END);
+	    else if (arel < 0)
+		argv_add(attrs, *a1, ARGV_END);
+	}
+    }
+
+    return ((attrs->argc > 0) ? attrs->argv : 0);
+}
+
+/*
+ * dict_ldap_get_values: for each entry returned by a search, get the values
+ * of all its attributes. Recurses to resolve any DN or URL values found.
+ *
+ * This and the rest of the handling of multiple attributes, DNs and URLs
+ * are thanks to LaMont Jones.
+ */
+static void dict_ldap_get_values(DICT_LDAP *dict_ldap, LDAPMessage *res,
+				         VSTRING *result, const char *name)
+{
+    static int recursion = 0;
+    static int expansion;
+    long    entries = 0;
+    long    i = 0;
+    int     rc = 0;
+    LDAPMessage *resloop = 0;
+    LDAPMessage *entry = 0;
+    BerElement *ber;
+    char   *attr;
+    char  **attrs;
+    struct berval **vals;
+    int     valcount;
+    LDAPURLDesc *url;
+    const char *myname = "dict_ldap_get_values";
+    int     is_leaf = 1;		/* No recursion via this entry */
+    int     is_terminal = 0;		/* No expansion via this entry */
+
+    if (++recursion == 1)
+	expansion = 0;
+
+    if (msg_verbose)
+	msg_info("%s[%d]: Search found %d match(es)", myname, recursion,
+		 ldap_count_entries(dict_ldap->ld, res));
+
+    for (entry = ldap_first_entry(dict_ldap->ld, res); entry != NULL;
+	 entry = ldap_next_entry(dict_ldap->ld, entry)) {
+	ber = NULL;
+
+	/*
+	 * LDAP should not, but may produce more than the requested maximum
+	 * number of entries.
+	 */
+	if (dict_ldap->dict.error == 0
+	    && dict_ldap->size_limit
+	    && ++entries > dict_ldap->size_limit) {
+	    msg_warn("%s[%d]: %s: Query size limit (%ld) exceeded",
+		     myname, recursion, dict_ldap->parser->name,
+		     dict_ldap->size_limit);
+	    dict_ldap->dict.error = DICT_ERR_RETRY;
+	}
+
+	/*
+	 * Check for terminal attributes, these preclude expansion of all
+	 * other attributes, and DN/URI recursion. Any terminal attributes
+	 * are listed first in the attribute array.
+	 */
+	if (dict_ldap->num_terminal > 0) {
+	    for (i = 0; i < dict_ldap->num_terminal; ++i) {
+		attr = dict_ldap->result_attributes->argv[i];
+		if (!(vals = ldap_get_values_len(dict_ldap->ld, entry, attr)))
+		    continue;
+		is_terminal = (ldap_count_values_len(vals) > 0);
+		ldap_value_free_len(vals);
+		if (is_terminal)
+		    break;
+	    }
+	}
+
+	/*
+	 * Check for special attributes, these preclude expansion of
+	 * "leaf-only" attributes, and are at the end of the attribute array
+	 * after the terminal, leaf and regular attributes.
+	 */
+	if (is_terminal == 0 && dict_ldap->num_leaf > 0) {
+	    for (i = dict_ldap->num_attributes;
+		 dict_ldap->result_attributes->argv[i]; ++i) {
+		attr = dict_ldap->result_attributes->argv[i];
+		if (!(vals = ldap_get_values_len(dict_ldap->ld, entry, attr)))
+		    continue;
+		is_leaf = (ldap_count_values_len(vals) == 0);
+		ldap_value_free_len(vals);
+		if (!is_leaf)
+		    break;
+	    }
+	}
+	for (attr = ldap_first_attribute(dict_ldap->ld, entry, &ber);
+	     attr != NULL; ldap_memfree(attr),
+	     attr = ldap_next_attribute(dict_ldap->ld, entry, ber)) {
+
+	    vals = ldap_get_values_len(dict_ldap->ld, entry, attr);
+	    if (vals == NULL) {
+		if (msg_verbose)
+		    msg_info("%s[%d]: Entry doesn't have any values for %s",
+			     myname, recursion, attr);
+		continue;
+	    }
+	    valcount = ldap_count_values_len(vals);
+
+	    /*
+	     * If we previously encountered an error, we still continue
+	     * through the loop, to avoid memory leaks, but we don't waste
+	     * time accumulating any further results.
+	     * 
+	     * XXX: There may be a more efficient way to exit the loop with no
+	     * leaks, but it will likely be more fragile and not worth the
+	     * extra code.
+	     */
+	    if (dict_ldap->dict.error != 0 || valcount == 0) {
+		ldap_value_free_len(vals);
+		continue;
+	    }
+
+	    /*
+	     * The "result_attributes" list enumerates all the requested
+	     * attributes, first the ordinary result attributes and then the
+	     * special result attributes that hold DN or LDAP URL values.
+	     * 
+	     * The number of ordinary attributes is "num_attributes".
+	     * 
+	     * We compute the attribute type (ordinary or special) from its
+	     * index on the "result_attributes" list.
+	     */
+	    for (i = 0; dict_ldap->result_attributes->argv[i]; i++)
+		if (attrdesc_subtype(dict_ldap->result_attributes->argv[i],
+				     attr) > 0)
+		    break;
+
+	    /*
+	     * Append each returned address to the result list, possibly
+	     * recursing (for dn or url attributes of non-terminal entries)
+	     */
+	    if (i < dict_ldap->num_attributes || is_terminal) {
+		if ((is_terminal && i >= dict_ldap->num_terminal)
+		    || (!is_leaf &&
+			i < dict_ldap->num_terminal + dict_ldap->num_leaf)) {
+		    if (msg_verbose)
+			msg_info("%s[%d]: skipping %d value(s) of %s "
+				 "attribute %s", myname, recursion, valcount,
+				 is_terminal ? "non-terminal" : "leaf-only",
+				 attr);
+		} else {
+		    /* Ordinary result attribute */
+		    for (i = 0; i < valcount; i++) {
+			if (db_common_expand(dict_ldap->ctx,
+					     dict_ldap->result_format,
+					     vals[i]->bv_val,
+					     name, result, 0)
+			    && dict_ldap->expansion_limit > 0
+			    && ++expansion > dict_ldap->expansion_limit) {
+			    msg_warn("%s[%d]: %s: Expansion limit exceeded "
+				     "for key: '%s'", myname, recursion,
+				     dict_ldap->parser->name, name);
+			    dict_ldap->dict.error = DICT_ERR_RETRY;
+			    break;
+			}
+		    }
+		    if (dict_ldap->dict.error != 0)
+			continue;
+		    if (msg_verbose)
+			msg_info("%s[%d]: search returned %d value(s) for"
+				 " requested result attribute %s",
+				 myname, recursion, valcount, attr);
+		}
+	    } else if (recursion < dict_ldap->recursion_limit
+		       && dict_ldap->result_attributes->argv[i]) {
+		/* Special result attribute */
+		for (i = 0; i < valcount; i++) {
+		    if (ldap_is_ldap_url(vals[i]->bv_val)) {
+			rc = ldap_url_parse(vals[i]->bv_val, &url);
+			if (rc == 0) {
+			    if ((attrs = url_attrs(dict_ldap, url)) != 0) {
+				if (msg_verbose)
+				    msg_info("%s[%d]: looking up URL %s",
+					     myname, recursion,
+					     vals[i]->bv_val);
+				rc = search_st(dict_ldap->ld, url->lud_dn,
+					       url->lud_scope,
+					       url->lud_filter,
+					       attrs, dict_ldap->timeout,
+					       &resloop);
+			    }
+			    ldap_free_urldesc(url);
+			    if (attrs == 0) {
+				if (msg_verbose)
+				    msg_info("%s[%d]: skipping URL %s: no "
+					     "pertinent attributes", myname,
+					     recursion, vals[i]->bv_val);
+				continue;
+			    }
+			} else {
+			    msg_warn("%s[%d]: malformed URL %s: %s(%d)",
+				     myname, recursion, vals[i]->bv_val,
+				     ldap_err2string(rc), rc);
+			    dict_ldap->dict.error = DICT_ERR_RETRY;
+			    break;
+			}
+		    } else {
+			if (msg_verbose)
+			    msg_info("%s[%d]: looking up DN %s",
+				     myname, recursion, vals[i]->bv_val);
+			rc = search_st(dict_ldap->ld, vals[i]->bv_val,
+				       LDAP_SCOPE_BASE, "objectclass=*",
+				       dict_ldap->result_attributes->argv,
+				       dict_ldap->timeout, &resloop);
+		    }
+		    switch (rc) {
+		    case LDAP_SUCCESS:
+			dict_ldap_get_values(dict_ldap, resloop, result, name);
+			break;
+		    case LDAP_NO_SUCH_OBJECT:
+
+			/*
+			 * Go ahead and treat this as though the DN existed
+			 * and just didn't have any result attributes.
+			 */
+			msg_warn("%s[%d]: DN %s not found, skipping ", myname,
+				 recursion, vals[i]->bv_val);
+			break;
+		    default:
+			msg_warn("%s[%d]: search error %d: %s ", myname,
+				 recursion, rc, ldap_err2string(rc));
+			dict_ldap->dict.error = DICT_ERR_RETRY;
+			break;
+		    }
+
+		    if (resloop != 0)
+			ldap_msgfree(resloop);
+
+		    if (dict_ldap->dict.error != 0)
+			break;
+		}
+		if (msg_verbose && dict_ldap->dict.error == 0)
+		    msg_info("%s[%d]: search returned %d value(s) for"
+			     " special result attribute %s",
+			     myname, recursion, valcount, attr);
+	    } else if (recursion >= dict_ldap->recursion_limit
+		       && dict_ldap->result_attributes->argv[i]) {
+		msg_warn("%s[%d]: %s: Recursion limit exceeded"
+			 " for special attribute %s=%s", myname, recursion,
+			 dict_ldap->parser->name, attr, vals[0]->bv_val);
+		dict_ldap->dict.error = DICT_ERR_RETRY;
+	    }
+	    ldap_value_free_len(vals);
+	}
+	if (ber)
+	    ber_free(ber, 0);
+    }
+
+    if (msg_verbose)
+	msg_info("%s[%d]: Leaving %s", myname, recursion, myname);
+    --recursion;
+}
+
+/* dict_ldap_lookup - find database entry */
+
+static const char *dict_ldap_lookup(DICT *dict, const char *name)
+{
+    const char *myname = "dict_ldap_lookup";
+    DICT_LDAP *dict_ldap = (DICT_LDAP *) dict;
+    LDAPMessage *res = 0;
+    static VSTRING *base;
+    static VSTRING *query;
+    static VSTRING *result;
+    int     rc = 0;
+    int     sizelimit;
+    int     domain_rc;
+
+    dict_ldap->dict.error = 0;
+
+    if (msg_verbose)
+	msg_info("%s: In dict_ldap_lookup", myname);
+
+    /*
+     * Don't frustrate future attempts to make Postfix UTF-8 transparent.
+     */
+    if ((dict->flags & DICT_FLAG_UTF8_ACTIVE) == 0
+	&& !valid_utf8_string(name, strlen(name))) {
+	if (msg_verbose)
+	    msg_info("%s: %s: Skipping lookup of non-UTF-8 key '%s'",
+		     myname, dict_ldap->parser->name, name);
+	return (0);
+    }
+
+    /*
+     * Optionally fold the key.
+     */
+    if (dict->flags & DICT_FLAG_FOLD_FIX) {
+	if (dict->fold_buf == 0)
+	    dict->fold_buf = vstring_alloc(10);
+	vstring_strcpy(dict->fold_buf, name);
+	name = lowercase(vstring_str(dict->fold_buf));
+    }
+
+    /*
+     * If they specified a domain list for this map, then only search for
+     * addresses in domains on the list. This can significantly reduce the
+     * load on the LDAP server.
+     */
+    if ((domain_rc = db_common_check_domain(dict_ldap->ctx, name)) == 0) {
+	if (msg_verbose)
+	    msg_info("%s: %s: Skipping lookup of key '%s': domain mismatch",
+		     myname, dict_ldap->parser->name, name);
+	return (0);
+    }
+    if (domain_rc < 0)
+	DICT_ERR_VAL_RETURN(dict, domain_rc, (char *) 0);
+
+#define INIT_VSTR(buf, len) do { \
+	if (buf == 0) \
+	    buf = vstring_alloc(len); \
+	VSTRING_RESET(buf); \
+	VSTRING_TERMINATE(buf); \
+    } while (0)
+
+    INIT_VSTR(base, 10);
+    INIT_VSTR(query, 10);
+    INIT_VSTR(result, 10);
+
+    /*
+     * Because the connection may be shared and invalidated via queries for
+     * another map, update private copy of "ld" from shared connection
+     * container.
+     */
+    dict_ldap->ld = DICT_LDAP_CONN(dict_ldap)->conn_ld;
+
+    /*
+     * Connect to the LDAP server, if necessary.
+     */
+    if (dict_ldap->ld == NULL) {
+	if (msg_verbose)
+	    msg_info
+		("%s: No existing connection for LDAP source %s, reopening",
+		 myname, dict_ldap->parser->name);
+
+	dict_ldap_connect(dict_ldap);
+
+	/*
+	 * if dict_ldap_connect() set dict_ldap->dict.error, abort.
+	 */
+	if (dict_ldap->dict.error)
+	    return (0);
+    } else if (msg_verbose)
+	msg_info("%s: Using existing connection for LDAP source %s",
+		 myname, dict_ldap->parser->name);
+
+    /*
+     * Connection caching, means that the connection handle may have the
+     * wrong size limit. Re-adjust before each query. This is cheap, just
+     * sets a field in the ldap connection handle. We also do this in the
+     * connect code, because we sometimes reconnect (below) in the middle of
+     * a query.
+     */
+    sizelimit = dict_ldap->size_limit ? dict_ldap->size_limit : LDAP_NO_LIMIT;
+    if (ldap_set_option(dict_ldap->ld, LDAP_OPT_SIZELIMIT, &sizelimit)
+	!= LDAP_OPT_SUCCESS) {
+	msg_warn("%s: %s: Unable to set query result size limit to %ld.",
+		 myname, dict_ldap->parser->name, dict_ldap->size_limit);
+	dict_ldap->dict.error = DICT_ERR_RETRY;
+	return (0);
+    }
+
+    /*
+     * Expand the search base and query. Skip lookup when the input key lacks
+     * sufficient domain components to satisfy all the requested
+     * %-substitutions.
+     * 
+     * When the search base is not static, LDAP_NO_SUCH_OBJECT is expected and
+     * is therefore treated as a non-error: the lookup returns no results
+     * rather than a soft error.
+     */
+    if (!db_common_expand(dict_ldap->ctx, dict_ldap->search_base,
+			  name, 0, base, rfc2253_quote)) {
+	if (msg_verbose > 1)
+	    msg_info("%s: %s: Empty expansion for %s", myname,
+		     dict_ldap->parser->name, dict_ldap->search_base);
+	return (0);
+    }
+    if (!db_common_expand(dict_ldap->ctx, dict_ldap->query,
+			  name, 0, query, rfc2254_quote)) {
+	if (msg_verbose > 1)
+	    msg_info("%s: %s: Empty expansion for %s", myname,
+		     dict_ldap->parser->name, dict_ldap->query);
+	return (0);
+    }
+
+    /*
+     * On to the search.
+     */
+    if (msg_verbose)
+	msg_info("%s: %s: Searching with filter %s", myname,
+		 dict_ldap->parser->name, vstring_str(query));
+
+    rc = search_st(dict_ldap->ld, vstring_str(base), dict_ldap->scope,
+		   vstring_str(query), dict_ldap->result_attributes->argv,
+		   dict_ldap->timeout, &res);
+
+    if (rc == LDAP_SERVER_DOWN) {
+	if (msg_verbose)
+	    msg_info("%s: Lost connection for LDAP source %s, reopening",
+		     myname, dict_ldap->parser->name);
+
+	dict_ldap_unbind(dict_ldap->ld);
+	dict_ldap->ld = DICT_LDAP_CONN(dict_ldap)->conn_ld = 0;
+	dict_ldap_connect(dict_ldap);
+
+	/*
+	 * if dict_ldap_connect() set dict_ldap->dict.error, abort.
+	 */
+	if (dict_ldap->dict.error)
+	    return (0);
+
+	rc = search_st(dict_ldap->ld, vstring_str(base), dict_ldap->scope,
+		     vstring_str(query), dict_ldap->result_attributes->argv,
+		       dict_ldap->timeout, &res);
+
+    }
+    switch (rc) {
+
+    case LDAP_SUCCESS:
+
+	/*
+	 * Search worked; extract the requested result_attribute.
+	 */
+
+	dict_ldap_get_values(dict_ldap, res, result, name);
+
+	/*
+	 * OpenLDAP's ldap_next_attribute returns a bogus
+	 * LDAP_DECODING_ERROR; I'm ignoring that for now.
+	 */
+
+	rc = dict_ldap_get_errno(dict_ldap->ld);
+	if (rc != LDAP_SUCCESS && rc != LDAP_DECODING_ERROR)
+	    msg_warn
+		("%s: Had some trouble with entries returned by search: %s",
+		 myname, ldap_err2string(rc));
+
+	if (msg_verbose)
+	    msg_info("%s: Search returned %s", myname,
+		     VSTRING_LEN(result) >
+		     0 ? vstring_str(result) : "nothing");
+	break;
+
+    case LDAP_NO_SUCH_OBJECT:
+
+	/*
+	 * If the search base is input key dependent, then not finding it, is
+	 * equivalent to not finding the input key. Sadly, we cannot detect
+	 * misconfiguration in this case.
+	 */
+	if (dict_ldap->dynamic_base)
+	    break;
+
+	msg_warn("%s: %s: Search base '%s' not found: %d: %s",
+		 myname, dict_ldap->parser->name,
+		 vstring_str(base), rc, ldap_err2string(rc));
+	dict_ldap->dict.error = DICT_ERR_RETRY;
+	break;
+
+    default:
+
+	/*
+	 * Rats. The search didn't work.
+	 */
+	msg_warn("%s: Search error %d: %s ", myname, rc,
+		 ldap_err2string(rc));
+
+	/*
+	 * Tear down the connection so it gets set up from scratch on the
+	 * next lookup.
+	 */
+	dict_ldap_unbind(dict_ldap->ld);
+	dict_ldap->ld = DICT_LDAP_CONN(dict_ldap)->conn_ld = 0;
+
+	/*
+	 * And tell the caller to try again later.
+	 */
+	dict_ldap->dict.error = DICT_ERR_RETRY;
+	break;
+    }
+
+    /*
+     * Cleanup.
+     */
+    if (res != 0)
+	ldap_msgfree(res);
+
+    /*
+     * If we had an error, return nothing, Otherwise, return the result, if
+     * any.
+     */
+    return (VSTRING_LEN(result) > 0 && !dict_ldap->dict.error ? vstring_str(result) : 0);
+}
+
+/* dict_ldap_close - disassociate from data base */
+
+static void dict_ldap_close(DICT *dict)
+{
+    const char *myname = "dict_ldap_close";
+    DICT_LDAP *dict_ldap = (DICT_LDAP *) dict;
+    LDAP_CONN *conn = DICT_LDAP_CONN(dict_ldap);
+    BINHASH_INFO *ht = dict_ldap->ht;
+
+    if (--conn->conn_refcount == 0) {
+	if (conn->conn_ld) {
+	    if (msg_verbose)
+		msg_info("%s: Closed connection handle for LDAP source %s",
+			 myname, dict_ldap->parser->name);
+	    dict_ldap_unbind(conn->conn_ld);
+	}
+	binhash_delete(conn_hash, ht->key, ht->key_len, myfree);
+    }
+    cfg_parser_free(dict_ldap->parser);
+    myfree(dict_ldap->server_host);
+    myfree(dict_ldap->search_base);
+    myfree(dict_ldap->query);
+    if (dict_ldap->result_format)
+	myfree(dict_ldap->result_format);
+    argv_free(dict_ldap->result_attributes);
+    myfree(dict_ldap->bind_dn);
+    myfree(dict_ldap->bind_pw);
+    if (dict_ldap->ctx)
+	db_common_free_ctx(dict_ldap->ctx);
+#ifdef LDAP_API_FEATURE_X_OPENLDAP
+#if defined(USE_LDAP_SASL)
+    if (DICT_LDAP_DO_SASL(dict_ldap)) {
+	myfree(dict_ldap->sasl_mechs);
+	myfree(dict_ldap->sasl_realm);
+	myfree(dict_ldap->sasl_authz);
+    }
+#endif
+    myfree(dict_ldap->tls_ca_cert_file);
+    myfree(dict_ldap->tls_ca_cert_dir);
+    myfree(dict_ldap->tls_cert);
+    myfree(dict_ldap->tls_key);
+    myfree(dict_ldap->tls_random_file);
+    myfree(dict_ldap->tls_cipher_suite);
+#endif
+    if (dict->fold_buf)
+	vstring_free(dict->fold_buf);
+    dict_free(dict);
+}
+
+/* dict_ldap_open - create association with data base */
+
+DICT   *dict_ldap_open(const char *ldapsource, int open_flags, int dict_flags)
+{
+    const char *myname = "dict_ldap_open";
+    DICT_LDAP *dict_ldap;
+    VSTRING *url_list;
+    char   *s;
+    char   *h;
+    char   *server_host;
+    char   *scope;
+    char   *attr;
+    char   *bindopt;
+    int     tmp;
+    int     vendor_version = dict_ldap_vendor_version();
+    CFG_PARSER *parser;
+
+    if (msg_verbose)
+	msg_info("%s: Using LDAP source %s", myname, ldapsource);
+
+    /*
+     * Sanity check.
+     */
+    if (open_flags != O_RDONLY)
+	return (dict_surrogate(DICT_TYPE_LDAP, ldapsource, open_flags, dict_flags,
+			       "%s:%s map requires O_RDONLY access mode",
+			       DICT_TYPE_LDAP, ldapsource));
+
+    /*
+     * Open the configuration file.
+     */
+    if ((parser = cfg_parser_alloc(ldapsource)) == 0)
+	return (dict_surrogate(DICT_TYPE_LDAP, ldapsource, open_flags, dict_flags,
+			       "open %s: %m", ldapsource));
+
+    dict_ldap = (DICT_LDAP *) dict_alloc(DICT_TYPE_LDAP, ldapsource,
+					 sizeof(*dict_ldap));
+    dict_ldap->dict.lookup = dict_ldap_lookup;
+    dict_ldap->dict.close = dict_ldap_close;
+    dict_ldap->dict.flags = dict_flags;
+
+    dict_ldap->ld = NULL;
+    dict_ldap->parser = parser;
+
+    server_host = cfg_get_str(dict_ldap->parser, "server_host",
+			      "localhost", 1, 0);
+
+    /*
+     * get configured value of "server_port"; default to LDAP_PORT (389)
+     */
+    dict_ldap->server_port =
+	cfg_get_int(dict_ldap->parser, "server_port", LDAP_PORT, 0, 0);
+
+    /*
+     * Define LDAP Protocol Version.
+     */
+    dict_ldap->version = cfg_get_int(dict_ldap->parser, "version", 2, 2, 0);
+    switch (dict_ldap->version) {
+    case 2:
+	dict_ldap->version = LDAP_VERSION2;
+	break;
+    case 3:
+	dict_ldap->version = LDAP_VERSION3;
+	break;
+    default:
+	msg_warn("%s: %s Unknown version %d, using 2.", myname, ldapsource,
+		 dict_ldap->version);
+	dict_ldap->version = LDAP_VERSION2;
+    }
+
+#if defined(LDAP_API_FEATURE_X_OPENLDAP)
+    dict_ldap->ldap_ssl = 0;
+#endif
+
+    url_list = vstring_alloc(32);
+    s = server_host;
+    while ((h = mystrtok(&s, CHARS_COMMA_SP)) != NULL) {
+#if defined(LDAP_API_FEATURE_X_OPENLDAP)
+
+	/*
+	 * Convert (host, port) pairs to LDAP URLs
+	 */
+	if (ldap_is_ldap_url(h)) {
+	    LDAPURLDesc *url_desc;
+	    int     rc;
+
+	    if ((rc = ldap_url_parse(h, &url_desc)) != 0) {
+		msg_error("%s: error parsing URL %s: %d: %s; skipping", myname,
+			  h, rc, ldap_err2string(rc));
+		continue;
+	    }
+	    if (strcasecmp(url_desc->lud_scheme, "ldap") != 0 &&
+		dict_ldap->version != LDAP_VERSION3) {
+		msg_warn("%s: URL scheme %s requires protocol version 3", myname,
+			 url_desc->lud_scheme);
+		dict_ldap->version = LDAP_VERSION3;
+	    }
+	    if (strcasecmp(url_desc->lud_scheme, "ldaps") == 0)
+		dict_ldap->ldap_ssl = 1;
+	    ldap_free_urldesc(url_desc);
+	    if (VSTRING_LEN(url_list) > 0)
+		VSTRING_ADDCH(url_list, ' ');
+	    vstring_strcat(url_list, h);
+	} else {
+	    if (VSTRING_LEN(url_list) > 0)
+		VSTRING_ADDCH(url_list, ' ');
+	    if (strrchr(h, ':'))
+		vstring_sprintf_append(url_list, "ldap://%s", h);
+	    else
+		vstring_sprintf_append(url_list, "ldap://%s:%d", h,
+				       dict_ldap->server_port);
+	}
+#else
+	if (VSTRING_LEN(url_list) > 0)
+	    VSTRING_ADDCH(url_list, ' ');
+	vstring_strcat(url_list, h);
+#endif
+    }
+    VSTRING_TERMINATE(url_list);
+    dict_ldap->server_host = vstring_export(url_list);
+
+#if defined(LDAP_API_FEATURE_X_OPENLDAP)
+
+    /*
+     * With URL scheme, clear port to normalize connection cache key
+     */
+    dict_ldap->server_port = LDAP_PORT;
+    if (msg_verbose)
+	msg_info("%s: %s server_host URL is %s", myname, ldapsource,
+		 dict_ldap->server_host);
+#endif
+    myfree(server_host);
+
+    /*
+     * Scope handling thanks to Carsten Hoeger of SuSE.
+     */
+    scope = cfg_get_str(dict_ldap->parser, "scope", "sub", 1, 0);
+
+    if (strcasecmp(scope, "one") == 0) {
+	dict_ldap->scope = LDAP_SCOPE_ONELEVEL;
+    } else if (strcasecmp(scope, "base") == 0) {
+	dict_ldap->scope = LDAP_SCOPE_BASE;
+    } else if (strcasecmp(scope, "sub") == 0) {
+	dict_ldap->scope = LDAP_SCOPE_SUBTREE;
+    } else {
+	msg_warn("%s: %s: Unrecognized value %s specified for scope; using sub",
+		 myname, ldapsource, scope);
+	dict_ldap->scope = LDAP_SCOPE_SUBTREE;
+    }
+
+    myfree(scope);
+
+    dict_ldap->search_base = cfg_get_str(dict_ldap->parser, "search_base",
+					 "", 0, 0);
+
+    /*
+     * get configured value of "timeout"; default to 10 seconds
+     * 
+     * Thanks to Manuel Guesdon for spotting that this wasn't really getting
+     * set.
+     */
+    dict_ldap->timeout = cfg_get_int(dict_ldap->parser, "timeout", 10, 0, 0);
+    dict_ldap->query =
+	cfg_get_str(dict_ldap->parser, "query_filter",
+		    "(mailacceptinggeneralid=%s)", 0, 0);
+    if ((dict_ldap->result_format =
+	 cfg_get_str(dict_ldap->parser, "result_format", 0, 0, 0)) == 0)
+	dict_ldap->result_format =
+	    cfg_get_str(dict_ldap->parser, "result_filter", "%s", 1, 0);
+
+    /*
+     * Must parse all templates before we can use db_common_expand() If data
+     * dependent substitutions are found in the search base, treat
+     * NO_SUCH_OBJECT search errors as a non-matching key, rather than a
+     * fatal run-time error.
+     */
+    dict_ldap->ctx = 0;
+    dict_ldap->dynamic_base =
+	db_common_parse(&dict_ldap->dict, &dict_ldap->ctx,
+			dict_ldap->search_base, 1);
+    if (!db_common_parse(0, &dict_ldap->ctx, dict_ldap->query, 1)) {
+	msg_warn("%s: %s: Fixed query_filter %s is probably useless",
+		 myname, ldapsource, dict_ldap->query);
+    }
+    (void) db_common_parse(0, &dict_ldap->ctx, dict_ldap->result_format, 0);
+    db_common_parse_domain(dict_ldap->parser, dict_ldap->ctx);
+
+    /*
+     * Maps that use substring keys should only be used with the full input
+     * key.
+     */
+    if (db_common_dict_partial(dict_ldap->ctx))
+	dict_ldap->dict.flags |= DICT_FLAG_PATTERN;
+    else
+	dict_ldap->dict.flags |= DICT_FLAG_FIXED;
+    if (dict_flags & DICT_FLAG_FOLD_FIX)
+	dict_ldap->dict.fold_buf = vstring_alloc(10);
+
+    /* Order matters, first the terminal attributes: */
+    attr = cfg_get_str(dict_ldap->parser, "terminal_result_attribute", "", 0, 0);
+    dict_ldap->result_attributes = argv_split(attr, CHARS_COMMA_SP);
+    dict_ldap->num_terminal = dict_ldap->result_attributes->argc;
+    myfree(attr);
+
+    /* Order matters, next the leaf-only attributes: */
+    attr = cfg_get_str(dict_ldap->parser, "leaf_result_attribute", "", 0, 0);
+    if (*attr)
+	argv_split_append(dict_ldap->result_attributes, attr, CHARS_COMMA_SP);
+    dict_ldap->num_leaf =
+	dict_ldap->result_attributes->argc - dict_ldap->num_terminal;
+    myfree(attr);
+
+    /* Order matters, next the regular attributes: */
+    attr = cfg_get_str(dict_ldap->parser, "result_attribute", "maildrop", 0, 0);
+    if (*attr)
+	argv_split_append(dict_ldap->result_attributes, attr, CHARS_COMMA_SP);
+    dict_ldap->num_attributes = dict_ldap->result_attributes->argc;
+    myfree(attr);
+
+    /* Order matters, finally the special attributes: */
+    attr = cfg_get_str(dict_ldap->parser, "special_result_attribute", "", 0, 0);
+    if (*attr)
+	argv_split_append(dict_ldap->result_attributes, attr, CHARS_COMMA_SP);
+    myfree(attr);
+
+    /*
+     * get configured value of "bind"; default to simple bind
+     */
+    bindopt = cfg_get_str(dict_ldap->parser, "bind", CONFIG_BOOL_YES, 1, 0);
+    dict_ldap->bind = name_code(bindopt_table, NAME_CODE_FLAG_NONE, bindopt);
+    if (dict_ldap->bind < 0)
+	msg_fatal("%s: unsupported parameter value: %s = %s",
+		  dict_ldap->parser->name, "bind", bindopt);
+    myfree(bindopt);
+
+    /*
+     * get configured value of "bind_dn"; default to ""
+     */
+    dict_ldap->bind_dn = cfg_get_str(dict_ldap->parser, "bind_dn", "", 0, 0);
+
+    /*
+     * get configured value of "bind_pw"; default to ""
+     */
+    dict_ldap->bind_pw = cfg_get_str(dict_ldap->parser, "bind_pw", "", 0, 0);
+
+    /*
+     * LDAP message caching never worked and is no longer supported.
+     */
+    tmp = cfg_get_bool(dict_ldap->parser, "cache", 0);
+    if (tmp)
+	msg_warn("%s: %s ignoring cache", myname, ldapsource);
+
+    tmp = cfg_get_int(dict_ldap->parser, "cache_expiry", -1, 0, 0);
+    if (tmp >= 0)
+	msg_warn("%s: %s ignoring cache_expiry", myname, ldapsource);
+
+    tmp = cfg_get_int(dict_ldap->parser, "cache_size", -1, 0, 0);
+    if (tmp >= 0)
+	msg_warn("%s: %s ignoring cache_size", myname, ldapsource);
+
+    dict_ldap->recursion_limit = cfg_get_int(dict_ldap->parser,
+					     "recursion_limit", 1000, 1, 0);
+
+    /*
+     * XXX: The default should be non-zero for safety, but that is not
+     * backwards compatible.
+     */
+    dict_ldap->expansion_limit = cfg_get_int(dict_ldap->parser,
+					     "expansion_limit", 0, 0, 0);
+
+    dict_ldap->size_limit = cfg_get_int(dict_ldap->parser, "size_limit",
+					dict_ldap->expansion_limit, 0, 0);
+
+    /*
+     * Alias dereferencing suggested by Mike Mattice.
+     */
+    dict_ldap->dereference = cfg_get_int(dict_ldap->parser, "dereference",
+					 0, 0, 0);
+    if (dict_ldap->dereference < 0 || dict_ldap->dereference > 3) {
+	msg_warn("%s: %s Unrecognized value %d specified for dereference; using 0",
+		 myname, ldapsource, dict_ldap->dereference);
+	dict_ldap->dereference = 0;
+    }
+    /* Referral chasing */
+    dict_ldap->chase_referrals = cfg_get_bool(dict_ldap->parser,
+					      "chase_referrals", 0);
+
+#ifdef LDAP_API_FEATURE_X_OPENLDAP
+#if defined(USE_LDAP_SASL)
+
+    /*
+     * SASL options
+     */
+    if (DICT_LDAP_DO_SASL(dict_ldap)) {
+	dict_ldap->sasl_mechs =
+	    cfg_get_str(dict_ldap->parser, "sasl_mechs", "", 0, 0);
+	dict_ldap->sasl_realm =
+	    cfg_get_str(dict_ldap->parser, "sasl_realm", "", 0, 0);
+	dict_ldap->sasl_authz =
+	    cfg_get_str(dict_ldap->parser, "sasl_authz_id", "", 0, 0);
+	dict_ldap->sasl_minssf =
+	    cfg_get_int(dict_ldap->parser, "sasl_minssf", 0, 0, 4096);
+    } else {
+	dict_ldap->sasl_mechs = 0;
+	dict_ldap->sasl_realm = 0;
+	dict_ldap->sasl_authz = 0;
+    }
+#endif
+
+    /*
+     * TLS options
+     */
+    /* get configured value of "start_tls"; default to no */
+    dict_ldap->start_tls = cfg_get_bool(dict_ldap->parser, "start_tls", 0);
+    if (dict_ldap->start_tls) {
+	if (dict_ldap->version < LDAP_VERSION3) {
+	    msg_warn("%s: %s start_tls requires protocol version 3",
+		     myname, ldapsource);
+	    dict_ldap->version = LDAP_VERSION3;
+	}
+	/* Binary incompatibility in the OpenLDAP API from 2.0.11 to 2.0.12 */
+	if (((LDAP_VENDOR_VERSION <= 20011) && !(vendor_version <= 20011))
+	  || (!(LDAP_VENDOR_VERSION <= 20011) && (vendor_version <= 20011)))
+	    msg_fatal("%s: incompatible TLS support: "
+		      "compile-time OpenLDAP version %d, "
+		      "run-time OpenLDAP version %d",
+		      myname, LDAP_VENDOR_VERSION, vendor_version);
+    }
+    /* get configured value of "tls_require_cert"; default to no */
+    dict_ldap->tls_require_cert =
+	cfg_get_bool(dict_ldap->parser, "tls_require_cert", 0) ?
+	LDAP_OPT_X_TLS_DEMAND : LDAP_OPT_X_TLS_NEVER;
+
+    /* get configured value of "tls_ca_cert_file"; default "" */
+    dict_ldap->tls_ca_cert_file = cfg_get_str(dict_ldap->parser,
+					      "tls_ca_cert_file", "", 0, 0);
+
+    /* get configured value of "tls_ca_cert_dir"; default "" */
+    dict_ldap->tls_ca_cert_dir = cfg_get_str(dict_ldap->parser,
+					     "tls_ca_cert_dir", "", 0, 0);
+
+    /* get configured value of "tls_cert"; default "" */
+    dict_ldap->tls_cert = cfg_get_str(dict_ldap->parser, "tls_cert",
+				      "", 0, 0);
+
+    /* get configured value of "tls_key"; default "" */
+    dict_ldap->tls_key = cfg_get_str(dict_ldap->parser, "tls_key",
+				     "", 0, 0);
+
+    /* get configured value of "tls_random_file"; default "" */
+    dict_ldap->tls_random_file = cfg_get_str(dict_ldap->parser,
+					     "tls_random_file", "", 0, 0);
+
+    /* get configured value of "tls_cipher_suite"; default "" */
+    dict_ldap->tls_cipher_suite = cfg_get_str(dict_ldap->parser,
+					      "tls_cipher_suite", "", 0, 0);
+#endif
+
+    /*
+     * Debug level.
+     */
+#if defined(LDAP_OPT_DEBUG_LEVEL) && defined(LBER_OPT_LOG_PRINT_FN)
+    dict_ldap->debuglevel = cfg_get_int(dict_ldap->parser, "debuglevel",
+					0, 0, 0);
+#endif
+
+    /*
+     * Find or allocate shared LDAP connection container.
+     */
+    dict_ldap_conn_find(dict_ldap);
+
+    /*
+     * Return the new dict_ldap structure.
+     */
+    dict_ldap->dict.owner = cfg_get_owner(dict_ldap->parser);
+    return (DICT_DEBUG (&dict_ldap->dict));
+}
+
+#endif