summaryrefslogtreecommitdiff
path: root/source3/lib/smbldap.c
blob: c4abc8cf1ab3fa9c18e3b05ce325de92fb308364 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
/* 
   Unix SMB/CIFS mplementation.
   LDAP protocol helper functions for SAMBA
   Copyright (C) Jean François Micouleau	1998
   Copyright (C) Gerald Carter			2001-2003
   Copyright (C) Shahms King			2001
   Copyright (C) Andrew Bartlett		2002-2003
   Copyright (C) Stefan (metze) Metzmacher	2002-2003
    
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   
*/

#include "includes.h"
#include "smbldap.h"

#ifndef LDAP_OPT_SUCCESS
#define LDAP_OPT_SUCCESS 0
#endif

/* Try not to hit the up or down server forever */

#define SMBLDAP_DONT_PING_TIME 10	/* ping only all 10 seconds */
#define SMBLDAP_NUM_RETRIES 8	        /* retry only 8 times */

#define SMBLDAP_IDLE_TIME 150		/* After 2.5 minutes disconnect */


/* attributes used by Samba 2.2 */

ATTRIB_MAP_ENTRY attrib_map_v22[] = {
	{ LDAP_ATTR_UID,		"uid" 		},
	{ LDAP_ATTR_UIDNUMBER,		LDAP_ATTRIBUTE_UIDNUMBER},
	{ LDAP_ATTR_GIDNUMBER,		LDAP_ATTRIBUTE_GIDNUMBER},
	{ LDAP_ATTR_UNIX_HOME,		"homeDirectory"	},
	{ LDAP_ATTR_PWD_LAST_SET,	"pwdLastSet"	},
	{ LDAP_ATTR_PWD_CAN_CHANGE,	"pwdCanChange"	},
	{ LDAP_ATTR_PWD_MUST_CHANGE,	"pwdMustChange"	},
	{ LDAP_ATTR_LOGON_TIME,		"logonTime" 	},
	{ LDAP_ATTR_LOGOFF_TIME,	"logoffTime"	},
	{ LDAP_ATTR_KICKOFF_TIME,	"kickoffTime"	},
	{ LDAP_ATTR_CN,			"cn"		},
	{ LDAP_ATTR_DISPLAY_NAME,	"displayName"	},
	{ LDAP_ATTR_HOME_PATH,		"smbHome"	},
	{ LDAP_ATTR_HOME_DRIVE,		"homeDrives"	},
	{ LDAP_ATTR_LOGON_SCRIPT,	"scriptPath"	},
	{ LDAP_ATTR_PROFILE_PATH,	"profilePath"	},
	{ LDAP_ATTR_DESC,		"description"	},
	{ LDAP_ATTR_USER_WKS,		"userWorkstations"},
	{ LDAP_ATTR_USER_RID,		"rid"		},
	{ LDAP_ATTR_PRIMARY_GROUP_RID,	"primaryGroupID"},
	{ LDAP_ATTR_LMPW,		"lmPassword"	},
	{ LDAP_ATTR_NTPW,		"ntPassword"	},
	{ LDAP_ATTR_DOMAIN,		"domain"	},
	{ LDAP_ATTR_OBJCLASS,		"objectClass"	},
	{ LDAP_ATTR_ACB_INFO,		"acctFlags"	},
	{ LDAP_ATTR_MOD_TIMESTAMP,	"modifyTimestamp"	},
	{ LDAP_ATTR_LIST_END,		NULL 		}
};

/* attributes used by Samba 3.0's sambaSamAccount */

ATTRIB_MAP_ENTRY attrib_map_v30[] = {
	{ LDAP_ATTR_UID,		"uid" 			},
	{ LDAP_ATTR_UIDNUMBER,		LDAP_ATTRIBUTE_UIDNUMBER},
	{ LDAP_ATTR_GIDNUMBER,		LDAP_ATTRIBUTE_GIDNUMBER},
	{ LDAP_ATTR_UNIX_HOME,		"homeDirectory"		},
	{ LDAP_ATTR_PWD_LAST_SET,	"sambaPwdLastSet"	},
	{ LDAP_ATTR_PWD_CAN_CHANGE,	"sambaPwdCanChange"	},
	{ LDAP_ATTR_PWD_MUST_CHANGE,	"sambaPwdMustChange"	},
	{ LDAP_ATTR_LOGON_TIME,		"sambaLogonTime" 	},
	{ LDAP_ATTR_LOGOFF_TIME,	"sambaLogoffTime"	},
	{ LDAP_ATTR_KICKOFF_TIME,	"sambaKickoffTime"	},
	{ LDAP_ATTR_CN,			"cn"			},
	{ LDAP_ATTR_DISPLAY_NAME,	"displayName"		},
	{ LDAP_ATTR_HOME_DRIVE,		"sambaHomeDrive"	},
	{ LDAP_ATTR_HOME_PATH,		"sambaHomePath"		},
	{ LDAP_ATTR_LOGON_SCRIPT,	"sambaLogonScript"	},
	{ LDAP_ATTR_PROFILE_PATH,	"sambaProfilePath"	},
	{ LDAP_ATTR_DESC,		"description"		},
	{ LDAP_ATTR_USER_WKS,		"sambaUserWorkstations"	},
	{ LDAP_ATTR_USER_SID,		LDAP_ATTRIBUTE_SID	},
	{ LDAP_ATTR_PRIMARY_GROUP_SID,	"sambaPrimaryGroupSID"	},
	{ LDAP_ATTR_LMPW,		"sambaLMPassword"	},
	{ LDAP_ATTR_NTPW,		"sambaNTPassword"	},
	{ LDAP_ATTR_DOMAIN,		"sambaDomainName"	},
	{ LDAP_ATTR_OBJCLASS,		"objectClass"		},
	{ LDAP_ATTR_ACB_INFO,		"sambaAcctFlags"	},
	{ LDAP_ATTR_MUNGED_DIAL,	"sambaMungedDial"	},
	{ LDAP_ATTR_BAD_PASSWORD_COUNT,	"sambaBadPasswordCount" },
	{ LDAP_ATTR_BAD_PASSWORD_TIME,	"sambaBadPasswordTime" 	},
	{ LDAP_ATTR_PWD_HISTORY,	"sambaPasswordHistory"  },
	{ LDAP_ATTR_MOD_TIMESTAMP,	"modifyTimestamp"	},
	{ LDAP_ATTR_LOGON_HOURS,	"sambaLogonHours"	},
	{ LDAP_ATTR_LIST_END,		NULL 			}
};

/* attributes used for allocating RIDs */

ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
	{ LDAP_ATTR_DOMAIN,		"sambaDomainName"	},
	{ LDAP_ATTR_NEXT_RID,	        "sambaNextRid"	        },
	{ LDAP_ATTR_NEXT_USERRID,	"sambaNextUserRid"	},
	{ LDAP_ATTR_NEXT_GROUPRID,	"sambaNextGroupRid"	},
	{ LDAP_ATTR_DOM_SID,		LDAP_ATTRIBUTE_SID	},
	{ LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
	{ LDAP_ATTR_OBJCLASS,		"objectClass"		},
	{ LDAP_ATTR_LIST_END,		NULL			},
};

/* Samba 3.0 group mapping attributes */

ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
	{ LDAP_ATTR_GIDNUMBER,		LDAP_ATTRIBUTE_GIDNUMBER},
	{ LDAP_ATTR_GROUP_SID,		LDAP_ATTRIBUTE_SID	},
	{ LDAP_ATTR_GROUP_TYPE,		"sambaGroupType"	},
	{ LDAP_ATTR_SID_LIST,		"sambaSIDList"		},
	{ LDAP_ATTR_DESC,		"description"		},
	{ LDAP_ATTR_DISPLAY_NAME,	"displayName"		},
	{ LDAP_ATTR_CN,			"cn"			},
	{ LDAP_ATTR_OBJCLASS,		"objectClass"		},
	{ LDAP_ATTR_LIST_END,		NULL			}	
};

ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
	{ LDAP_ATTR_GROUP_SID,		LDAP_ATTRIBUTE_SID	},
	{ LDAP_ATTR_GROUP_TYPE,		"sambaGroupType"	},
	{ LDAP_ATTR_DESC,		"description"		},
	{ LDAP_ATTR_DISPLAY_NAME,	"displayName"		},
	{ LDAP_ATTR_SID_LIST,		"sambaSIDList"		},
	{ LDAP_ATTR_LIST_END,		NULL			}	
};

/* idmap_ldap sambaUnixIdPool */

ATTRIB_MAP_ENTRY idpool_attr_list[] = {
	{ LDAP_ATTR_UIDNUMBER,		LDAP_ATTRIBUTE_UIDNUMBER},
	{ LDAP_ATTR_GIDNUMBER,		LDAP_ATTRIBUTE_GIDNUMBER},
	{ LDAP_ATTR_OBJCLASS,		"objectClass"		},
	{ LDAP_ATTR_LIST_END,		NULL			}	
};

ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
	{ LDAP_ATTR_SID,		LDAP_ATTRIBUTE_SID	},
	{ LDAP_ATTR_UIDNUMBER,		LDAP_ATTRIBUTE_UIDNUMBER},
	{ LDAP_ATTR_GIDNUMBER,		LDAP_ATTRIBUTE_GIDNUMBER},
	{ LDAP_ATTR_OBJCLASS,		"objectClass"		},
	{ LDAP_ATTR_LIST_END,		NULL			}	
};

/**********************************************************************
 perform a simple table lookup and return the attribute name 
 **********************************************************************/
 
 const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
{
	int i = 0;
	
	while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
		if ( table[i].attrib == key )
			return table[i].name;
		i++;
	}
	
	return NULL;
}


/**********************************************************************
 Return the list of attribute names from a mapping table
 **********************************************************************/

 char** get_attr_list( ATTRIB_MAP_ENTRY table[] )
{
	char **names;
	int i = 0;
	
	while ( table[i].attrib != LDAP_ATTR_LIST_END )
		i++;
	i++;

	names = (char**)malloc( sizeof(char*)*i );
	if ( !names ) {
		DEBUG(0,("get_attr_list: out of memory\n"));
		return NULL;
	}

	i = 0;
	while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
		names[i] = strdup( table[i].name );
		i++;
	}
	names[i] = NULL;
	
	return names;
}

/*********************************************************************
 Cleanup 
 ********************************************************************/

 void free_attr_list( char **list )
{
	int i = 0;

	if ( !list )
		return; 

	while ( list[i] ) {
		SAFE_FREE( list[i] );
		i+=1;
	}

	SAFE_FREE( list );
}

/*******************************************************************
 find the ldap password
******************************************************************/
static BOOL fetch_ldap_pw(char **dn, char** pw)
{
	char *key = NULL;
	size_t size;
	
	*dn = smb_xstrdup(lp_ldap_admin_dn());
	
	if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) {
		SAFE_FREE(*dn);
		DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n"));
	}
	
	*pw=secrets_fetch(key, &size);
	SAFE_FREE(key);

	if (!size) {
		/* Upgrade 2.2 style entry */
		char *p;
	        char* old_style_key = strdup(*dn);
		char *data;
		fstring old_style_pw;
		
		if (!old_style_key) {
			DEBUG(0, ("fetch_ldap_pw: strdup failed!\n"));
			return False;
		}

		for (p=old_style_key; *p; p++)
			if (*p == ',') *p = '/';
	
		data=secrets_fetch(old_style_key, &size);
		if (!size && size < sizeof(old_style_pw)) {
			DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n"));
			SAFE_FREE(old_style_key);
			SAFE_FREE(*dn);
			return False;
		}

		size = MIN(size, sizeof(fstring)-1);
		strncpy(old_style_pw, data, size);
		old_style_pw[size] = 0;

		SAFE_FREE(data);

		if (!secrets_store_ldap_pw(*dn, old_style_pw)) {
			DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n"));
			SAFE_FREE(old_style_key);
			SAFE_FREE(*dn);
			return False;			
		}
		if (!secrets_delete(old_style_key)) {
			DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n"));
		}

		SAFE_FREE(old_style_key);

		*pw = smb_xstrdup(old_style_pw);		
	}
	
	return True;
}

/*******************************************************************
 Search an attribute and return the first value found.
******************************************************************/

 BOOL smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
				    const char *attribute, char *value,
				    int max_len)
{
	char **values;
	
	if ( !attribute )
		return False;
		
	value[0] = '\0';

	if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
		DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
		
		return False;
	}
	
	if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
		DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n", 
			  attribute, values[0]));
		ldap_value_free(values);
		return False;
	}
	
	ldap_value_free(values);
#ifdef DEBUG_PASSWORDS
	DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
#endif	
	return True;
}

 BOOL smbldap_get_single_pstring (LDAP * ldap_struct, LDAPMessage * entry,
				  const char *attribute, pstring value)
{
	return smbldap_get_single_attribute(ldap_struct, entry,
					    attribute, value, 
					    sizeof(pstring));
}

/************************************************************************
 Routine to manage the LDAPMod structure array
 manage memory used by the array, by each struct, and values
 ***********************************************************************/

 void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
{
	LDAPMod **mods;
	int i;
	int j;

	mods = *modlist;

	/* sanity checks on the mod values */

	if (attribute == NULL || *attribute == '\0') {
		return;	
	}

#if 0	/* commented out after discussion with abartlet.  Do not reenable.
	   left here so other so re-add similar code   --jerry */
       	if (value == NULL || *value == '\0')
		return;
#endif

	if (mods == NULL) {
		mods = (LDAPMod **) malloc(sizeof(LDAPMod *));
		if (mods == NULL) {
			DEBUG(0, ("make_a_mod: out of memory!\n"));
			return;
		}
		mods[0] = NULL;
	}

	for (i = 0; mods[i] != NULL; ++i) {
		if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
			break;
	}

	if (mods[i] == NULL) {
		mods = (LDAPMod **) Realloc (mods, (i + 2) * sizeof (LDAPMod *));
		if (mods == NULL) {
			DEBUG(0, ("make_a_mod: out of memory!\n"));
			return;
		}
		mods[i] = (LDAPMod *) malloc(sizeof(LDAPMod));
		if (mods[i] == NULL) {
			DEBUG(0, ("make_a_mod: out of memory!\n"));
			return;
		}
		mods[i]->mod_op = modop;
		mods[i]->mod_values = NULL;
		mods[i]->mod_type = strdup(attribute);
		mods[i + 1] = NULL;
	}

	if (value != NULL) {
		char *utf8_value = NULL;

		j = 0;
		if (mods[i]->mod_values != NULL) {
			for (; mods[i]->mod_values[j] != NULL; j++);
		}
		mods[i]->mod_values = (char **)Realloc(mods[i]->mod_values,
					       (j + 2) * sizeof (char *));
					       
		if (mods[i]->mod_values == NULL) {
			DEBUG (0, ("make_a_mod: Memory allocation failure!\n"));
			return;
		}

		if (push_utf8_allocate(&utf8_value, value) == (size_t)-1) {
			DEBUG (0, ("make_a_mod: String conversion failure!\n"));
			return;
		}

		mods[i]->mod_values[j] = utf8_value;

		mods[i]->mod_values[j + 1] = NULL;
	}
	*modlist = mods;
}

/**********************************************************************
  Set attribute to newval in LDAP, regardless of what value the
  attribute had in LDAP before.
*********************************************************************/

 void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
		      LDAPMod ***mods,
		      const char *attribute, const char *newval)
{
	char oldval[2048]; /* current largest allowed value is mungeddial */
	BOOL existed;

	if (attribute == NULL) {
		/* This can actually happen for ldapsam_compat where we for
		 * example don't have a password history */
		return;
	}

	if (existing != NULL) {
		existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
	} else {
		existed = False;
		*oldval = '\0';
	}

	/* all of our string attributes are case insensitive */
	
	if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
		
		/* Believe it or not, but LDAP will deny a delete and
		   an add at the same time if the values are the
		   same... */
		return;
	}

	if (existed) {
		/* There has been no value before, so don't delete it.
		 * Here's a possible race: We might end up with
		 * duplicate attributes */
		/* By deleting exactly the value we found in the entry this
		 * should be race-free in the sense that the LDAP-Server will
		 * deny the complete operation if somebody changed the
		 * attribute behind our back. */
		/* This will also allow modifying single valued attributes 
		 * in Novell NDS. In NDS you have to first remove attribute and then
		 * you could add new value */
		
		smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
	}

	/* Regardless of the real operation (add or modify)
	   we add the new value here. We rely on deleting
	   the old value, should it exist. */

	if ((newval != NULL) && (strlen(newval) > 0)) {
		smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
	}
}

/**********************************************************************
 Some varients of the LDAP rebind code do not pass in the third 'arg' 
 pointer to a void*, so we try and work around it by assuming that the 
 value of the 'LDAP *' pointer is the same as the one we had passed in
 **********************************************************************/

struct smbldap_state_lookup {
	LDAP *ld;
	struct smbldap_state *smbldap_state;
	struct smbldap_state_lookup *prev, *next;
};

static struct smbldap_state_lookup *smbldap_state_lookup_list;

static struct smbldap_state *smbldap_find_state(LDAP *ld) 
{
	struct smbldap_state_lookup *t;

	for (t = smbldap_state_lookup_list; t; t = t->next) {
		if (t->ld == ld) {
			return t->smbldap_state;
		}
	}
	return NULL;
}

static void smbldap_delete_state(struct smbldap_state *smbldap_state) 
{
	struct smbldap_state_lookup *t;

	for (t = smbldap_state_lookup_list; t; t = t->next) {
		if (t->smbldap_state == smbldap_state) {
			DLIST_REMOVE(smbldap_state_lookup_list, t);
			SAFE_FREE(t);
			return;
		}
	}
}

static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state) 
{
	struct smbldap_state *tmp_ldap_state;
	struct smbldap_state_lookup *t;
	struct smbldap_state_lookup *tmp;
	
	if ((tmp_ldap_state = smbldap_find_state(ld))) {
		SMB_ASSERT(tmp_ldap_state == smbldap_state);
		return;
	}

	t = smb_xmalloc(sizeof(*t));
	ZERO_STRUCTP(t);
	
	DLIST_ADD_END(smbldap_state_lookup_list, t, tmp);
	t->ld = ld;
	t->smbldap_state = smbldap_state;
}

/*******************************************************************
 open a connection to the ldap server.
******************************************************************/
static int smbldap_open_connection (struct smbldap_state *ldap_state)

{
	int rc = LDAP_SUCCESS;
	int version;
	BOOL ldap_v3 = False;
	LDAP **ldap_struct = &ldap_state->ldap_struct;

#ifdef HAVE_LDAP_INITIALIZE
	DEBUG(10, ("smbldap_open_connection: %s\n", ldap_state->uri));
	
	if ((rc = ldap_initialize(ldap_struct, ldap_state->uri)) != LDAP_SUCCESS) {
		DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
		return rc;
	}
#else 

	/* Parse the string manually */

	{
		int port = 0;
		fstring protocol;
		fstring host;
		const char *p = ldap_state->uri; 
		SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
		
		/* skip leading "URL:" (if any) */
		if ( strnequal( p, "URL:", 4 ) ) {
			p += 4;
		}
		
		sscanf(p, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
		
		if (port == 0) {
			if (strequal(protocol, "ldap")) {
				port = LDAP_PORT;
			} else if (strequal(protocol, "ldaps")) {
				port = LDAPS_PORT;
			} else {
				DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
			}
		}
		
		if ((*ldap_struct = ldap_init(host, port)) == NULL)	{
			DEBUG(0, ("ldap_init failed !\n"));
			return LDAP_OPERATIONS_ERROR;
		}
		
	        if (strequal(protocol, "ldaps")) {
#ifdef LDAP_OPT_X_TLS
			int tls = LDAP_OPT_X_TLS_HARD;
			if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
			{
				DEBUG(0, ("Failed to setup a TLS session\n"));
			}
			
			DEBUG(3,("LDAPS option set...!\n"));
#else
			DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
			return LDAP_OPERATIONS_ERROR;
#endif
		}
	}
#endif

	/* Store the LDAP pointer in a lookup list */

	smbldap_store_state(*ldap_struct, ldap_state);

	/* Upgrade to LDAPv3 if possible */

	if (ldap_get_option(*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS)
	{
		if (version != LDAP_VERSION3)
		{
			version = LDAP_VERSION3;
			if (ldap_set_option (*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS) {
				ldap_v3 = True;
			}
		} else {
			ldap_v3 = True;
		}
	}

	if (lp_ldap_ssl() == LDAP_SSL_START_TLS) {
#ifdef LDAP_OPT_X_TLS
		if (ldap_v3) {
			if ((rc = ldap_start_tls_s (*ldap_struct, NULL, NULL)) != LDAP_SUCCESS)
			{
				DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
					 ldap_err2string(rc)));
				return rc;
			}
			DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
		} else {
			
			DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
			return LDAP_OPERATIONS_ERROR;
		}
#else
		DEBUG(0,("smbldap_open_connection: StartTLS not supported by LDAP client libraries!\n"));
		return LDAP_OPERATIONS_ERROR;
#endif
	}

	DEBUG(2, ("smbldap_open_connection: connection opened\n"));
	return rc;
}


/*******************************************************************
 a rebind function for authenticated referrals
 This version takes a void* that we can shove useful stuff in :-)
******************************************************************/
#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
#else
static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp, 
				   int *methodp, int freeit, void *arg)
{
	struct smbldap_state *ldap_state = arg;
	
	/** @TODO Should we be doing something to check what servers we rebind to?
	    Could we get a referral to a machine that we don't want to give our
	    username and password to? */
	
	if (freeit) {
		SAFE_FREE(*whop);
		memset(*credp, '\0', strlen(*credp));
		SAFE_FREE(*credp);
	} else {
		DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n", 
			  ldap_state->bind_dn));

		*whop = strdup(ldap_state->bind_dn);
		if (!*whop) {
			return LDAP_NO_MEMORY;
		}
		*credp = strdup(ldap_state->bind_secret);
		if (!*credp) {
			SAFE_FREE(*whop);
			return LDAP_NO_MEMORY;
		}
		*methodp = LDAP_AUTH_SIMPLE;
	}

	GetTimeOfDay(&ldap_state->last_rebind);
		
	return 0;
}
#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/

/*******************************************************************
 a rebind function for authenticated referrals
 This version takes a void* that we can shove useful stuff in :-)
 and actually does the connection.
******************************************************************/
#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
static int rebindproc_connect_with_state (LDAP *ldap_struct, 
					  LDAP_CONST char *url, 
					  ber_tag_t request,
					  ber_int_t msgid, void *arg)
{
	struct smbldap_state *ldap_state = arg;
	int rc;
	DEBUG(5,("rebindproc_connect_with_state: Rebinding as \"%s\"\n", 
		 ldap_state->bind_dn));
	
	/** @TODO Should we be doing something to check what servers we rebind to?
	    Could we get a referral to a machine that we don't want to give our
	    username and password to? */

	rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
	
	GetTimeOfDay(&ldap_state->last_rebind);

	return rc;
}
#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/

/*******************************************************************
 Add a rebind function for authenticated referrals
******************************************************************/
#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
#else
# if LDAP_SET_REBIND_PROC_ARGS == 2
static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
		       int *method, int freeit )
{
	struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);

	return rebindproc_with_state(ldap_struct, whop, credp,
				     method, freeit, ldap_state);
	
}
# endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/

/*******************************************************************
 a rebind function for authenticated referrals
 this also does the connection, but no void*.
******************************************************************/
#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
# if LDAP_SET_REBIND_PROC_ARGS == 2
static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
			       ber_int_t msgid)
{
	struct smbldap_state *ldap_state = smbldap_find_state(ld);

	return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid, 
					     ldap_state);
}
# endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/

/*******************************************************************
 connect to the ldap server under system privilege.
******************************************************************/
static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
{
	int rc;
	char *ldap_dn;
	char *ldap_secret;

	/* get the password */
	if (!fetch_ldap_pw(&ldap_dn, &ldap_secret)) {
		DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
		return LDAP_INVALID_CREDENTIALS;
	}

	ldap_state->bind_dn = ldap_dn;
	ldap_state->bind_secret = ldap_secret;

	/* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite 
	   (OpenLDAP) doesnt' seem to support it */
	   
	DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
		  ldap_state->uri, ldap_dn));

#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
# if LDAP_SET_REBIND_PROC_ARGS == 2	
	ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);	
# endif
# if LDAP_SET_REBIND_PROC_ARGS == 3	
	ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);	
# endif
#else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
# if LDAP_SET_REBIND_PROC_ARGS == 2	
	ldap_set_rebind_proc(ldap_struct, &rebindproc);	
# endif
# if LDAP_SET_REBIND_PROC_ARGS == 3	
	ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);	
# endif
#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/

	rc = ldap_simple_bind_s(ldap_struct, ldap_dn, ldap_secret);

	if (rc != LDAP_SUCCESS) {
		char *ld_error = NULL;
		ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
				&ld_error);
		DEBUG(ldap_state->num_failures ? 2 : 0,
		      ("failed to bind to server with dn= %s Error: %s\n\t%s\n",
			       ldap_dn ? ldap_dn : "(unknown)", ldap_err2string(rc),
			       ld_error ? ld_error : "(unknown)"));
		SAFE_FREE(ld_error);
		ldap_state->num_failures++;
		return rc;
	}

	ldap_state->num_failures = 0;

	DEBUG(3, ("ldap_connect_system: succesful connection to the LDAP server\n"));
	return rc;
}

/**********************************************************************
 Connect to LDAP server (called before every ldap operation)
*********************************************************************/
static int smbldap_open(struct smbldap_state *ldap_state)
{
	int rc;
	SMB_ASSERT(ldap_state);
		
#ifndef NO_LDAP_SECURITY
	if (geteuid() != 0) {
		DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
		return  LDAP_INSUFFICIENT_ACCESS;
	}
#endif

       	if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
		struct sockaddr_un addr;
		socklen_t len = sizeof(addr);
		int sd;
		if (ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd) == 0 &&
		    getpeername(sd, (struct sockaddr *) &addr, &len) < 0) {
		    	/* the other end has died. reopen. */
		    	ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
		    	ldap_state->ldap_struct = NULL;
		    	ldap_state->last_ping = (time_t)0;
		} else {
			ldap_state->last_ping = time(NULL);
		} 
    	}

	if (ldap_state->ldap_struct != NULL) {
		DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
		return LDAP_SUCCESS;
	}

	if ((rc = smbldap_open_connection(ldap_state))) {
		return rc;
	}

	if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
		ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
		ldap_state->ldap_struct = NULL;
		return rc;
	}


	ldap_state->last_ping = time(NULL);
	DEBUG(4,("The LDAP server is succesfully connected\n"));

	return LDAP_SUCCESS;
}

/**********************************************************************
Disconnect from LDAP server 
*********************************************************************/
static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
{
	if (!ldap_state)
		return NT_STATUS_INVALID_PARAMETER;
		
	if (ldap_state->ldap_struct != NULL) {
		ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
		ldap_state->ldap_struct = NULL;
	}

	smbldap_delete_state(ldap_state);
	
	DEBUG(5,("The connection to the LDAP server was closed\n"));
	/* maybe free the results here --metze */
	
	

	return NT_STATUS_OK;
}

static BOOL got_alarm;

static void (*old_handler)(int);

static void gotalarm_sig(int dummy)
{
	got_alarm = True;
}

static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
			    int *attempts, time_t endtime)
{
	time_t now = time(NULL);
	int open_rc = LDAP_SERVER_DOWN;

	if (*rc != LDAP_SERVER_DOWN)
		goto no_next;

	now = time(NULL);

	if (now >= endtime) {
		smbldap_close(ldap_state);
		*rc = LDAP_TIMEOUT;
		goto no_next;
	}

	if (*attempts == 0) {
		got_alarm = False;
		old_handler = CatchSignal(SIGALRM, gotalarm_sig);
		alarm(endtime - now);
	}

	while (1) {

		if (*attempts != 0)
			smb_msleep(1000);

		*attempts += 1;

		open_rc = smbldap_open(ldap_state);

		if (open_rc == LDAP_SUCCESS) {
			ldap_state->last_use = now;
			return True;
		}

		if (got_alarm) {
			*rc = LDAP_TIMEOUT;
			break;
		}

		if (open_rc != LDAP_SUCCESS) {
			DEBUG(1, ("Connection to LDAP server failed for the "
				  "%d try!\n", *attempts));
		}
	}

 no_next:
	CatchSignal(SIGALRM, old_handler);
	alarm(0);
	ldap_state->last_use = now;
	return False;
}

/*********************************************************************
 ********************************************************************/

int smbldap_search(struct smbldap_state *ldap_state, 
		   const char *base, int scope, const char *filter, 
		   char *attrs[], int attrsonly, 
		   LDAPMessage **res)
{
	int 		rc = LDAP_SERVER_DOWN;
	int 		attempts = 0;
	char           *utf8_filter;
	time_t		endtime = time(NULL)+lp_ldap_timeout();

	SMB_ASSERT(ldap_state);
	
	DEBUG(5,("smbldap_search: base => [%s], filter => [%s], scope => [%d]\n",
		base, filter, scope));

	if (ldap_state->last_rebind.tv_sec > 0) {
		struct timeval	tval;
		SMB_BIG_INT	tdiff = 0;
		int		sleep_time = 0;

		ZERO_STRUCT(tval);
		GetTimeOfDay(&tval);

		tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
		tdiff /= 1000; /* Convert to milliseconds. */

		sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
		sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);

		if (sleep_time > 0) {
			/* we wait for the LDAP replication */
			DEBUG(5,("smbldap_search: waiting %d milliseconds for LDAP replication.\n",sleep_time));
			smb_msleep(sleep_time);
			DEBUG(5,("smbldap_search: go on!\n"));
		}
		ZERO_STRUCT(ldap_state->last_rebind);
	}

	if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) {
		return LDAP_NO_MEMORY;
	}

	while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
		rc = ldap_search_s(ldap_state->ldap_struct, base, scope, 
				   utf8_filter, attrs, attrsonly, res);
	
	SAFE_FREE(utf8_filter);
	return rc;
}

int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
{
	int 		rc = LDAP_SERVER_DOWN;
	int 		attempts = 0;
	char           *utf8_dn;
	time_t		endtime = time(NULL)+lp_ldap_timeout();

	SMB_ASSERT(ldap_state);

	DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));

	if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
		return LDAP_NO_MEMORY;
	}

	while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
		rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
		
	SAFE_FREE(utf8_dn);
	return rc;
}

int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
{
	int 		rc = LDAP_SERVER_DOWN;
	int 		attempts = 0;
	char           *utf8_dn;
	time_t		endtime = time(NULL)+lp_ldap_timeout();
	
	SMB_ASSERT(ldap_state);

	DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));

	if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
		return LDAP_NO_MEMORY;
	}

	while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
		rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
	
	SAFE_FREE(utf8_dn);
	return rc;
}

int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
{
	int 		rc = LDAP_SERVER_DOWN;
	int 		attempts = 0;
	char           *utf8_dn;
	time_t		endtime = time(NULL)+lp_ldap_timeout();
	
	SMB_ASSERT(ldap_state);

	DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));

	if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
		return LDAP_NO_MEMORY;
	}

	while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
		rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
	
	SAFE_FREE(utf8_dn);
	return rc;
}

int smbldap_extended_operation(struct smbldap_state *ldap_state, 
			       LDAP_CONST char *reqoid, struct berval *reqdata, 
			       LDAPControl **serverctrls, LDAPControl **clientctrls, 
			       char **retoidp, struct berval **retdatap)
{
	int 		rc = LDAP_SERVER_DOWN;
	int 		attempts = 0;
	time_t		endtime = time(NULL)+lp_ldap_timeout();
	
	if (!ldap_state)
		return (-1);

	while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
		rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
					       reqdata, serverctrls,
					       clientctrls, retoidp, retdatap);
	return rc;
}

/*******************************************************************
 run the search by name.
******************************************************************/
int smbldap_search_suffix (struct smbldap_state *ldap_state, const char *filter, 
			   char **search_attr, LDAPMessage ** result)
{
	int scope = LDAP_SCOPE_SUBTREE;
	int rc;

	rc = smbldap_search(ldap_state, lp_ldap_suffix(), scope, filter, search_attr, 0, result);

	if (rc != LDAP_SUCCESS)	{
		char *ld_error = NULL;
		ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
				&ld_error);
		DEBUG(0,("smbldap_search_suffix: Problem during the LDAP search: %s (%s)\n", 
			ld_error?ld_error:"(unknown)", ldap_err2string (rc)));
		SAFE_FREE(ld_error);
	}
	
	return rc;
}

static void smbldap_idle_fn(void **data, time_t *interval, time_t now)
{
	struct smbldap_state *state = (struct smbldap_state *)(*data);

	if (state->ldap_struct == NULL) {
		DEBUG(10,("ldap connection not connected...\n"));
		return;
	}
		
	if ((state->last_use+SMBLDAP_IDLE_TIME) > now) {
		DEBUG(10,("ldap connection not idle...\n"));
		return;
	}
		
	DEBUG(7,("ldap connection idle...closing connection\n"));
	smbldap_close(state);
}

/**********************************************************************
 Housekeeping
 *********************************************************************/

void smbldap_free_struct(struct smbldap_state **ldap_state) 
{
	smbldap_close(*ldap_state);
	
	if ((*ldap_state)->bind_secret) {
		memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
	}

	SAFE_FREE((*ldap_state)->bind_dn);
	SAFE_FREE((*ldap_state)->bind_secret);

	smb_unregister_idle_event((*ldap_state)->event_id);

	*ldap_state = NULL;

	/* No need to free any further, as it is talloc()ed */
}


/**********************************************************************
 Intitalise the 'general' ldap structures, on which ldap operations may be conducted
 *********************************************************************/

NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, const char *location, struct smbldap_state **smbldap_state) 
{
	*smbldap_state = talloc_zero(mem_ctx, sizeof(**smbldap_state));
	if (!*smbldap_state) {
		DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
		return NT_STATUS_NO_MEMORY;
	}

	if (location) {
		(*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
	} else {
		(*smbldap_state)->uri = "ldap://localhost";
	}

	(*smbldap_state)->event_id =
		smb_register_idle_event(smbldap_idle_fn, (void *)(*smbldap_state),
					SMBLDAP_IDLE_TIME);

	if ((*smbldap_state)->event_id == SMB_EVENT_ID_INVALID) {
		DEBUG(0,("Failed to register LDAP idle event!\n"));
		return NT_STATUS_INVALID_HANDLE;
	}

	return NT_STATUS_OK;
}

/**********************************************************************
 Add the sambaDomain to LDAP, so we don't have to search for this stuff
 again.  This is a once-add operation for now.

 TODO:  Add other attributes, and allow modification.
*********************************************************************/
static NTSTATUS add_new_domain_info(struct smbldap_state *ldap_state, 
                                    const char *domain_name) 
{
	fstring sid_string;
	fstring algorithmic_rid_base_string;
	pstring filter, dn;
	LDAPMod **mods = NULL;
	int rc;
	int ldap_op;
	LDAPMessage *result = NULL;
	int num_result;
	char **attr_list;
	uid_t u_low, u_high;
	gid_t g_low, g_high;
	uint32 rid_low, rid_high;

	slprintf (filter, sizeof (filter) - 1, "(&(%s=%s)(objectclass=%s))", 
		  get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), 
		  domain_name, LDAP_OBJ_DOMINFO);

	attr_list = get_attr_list( dominfo_attr_list );
	rc = smbldap_search_suffix(ldap_state, filter, attr_list, &result);
	free_attr_list( attr_list );

	if (rc != LDAP_SUCCESS) {
		return NT_STATUS_UNSUCCESSFUL;
	}

	num_result = ldap_count_entries(ldap_state->ldap_struct, result);
	
	if (num_result > 1) {
		DEBUG (0, ("More than domain with that name exists: bailing out!\n"));
		ldap_msgfree(result);
		return NT_STATUS_UNSUCCESSFUL;
	}
	
	/* Check if we need to add an entry */
	DEBUG(3,("Adding new domain\n"));
	ldap_op = LDAP_MOD_ADD;

	pstr_sprintf(dn, "%s=%s,%s", get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN),
		domain_name, lp_ldap_suffix());

	/* Free original search */
	ldap_msgfree(result);

	/* make the changes - the entry *must* not already have samba attributes */
	smbldap_set_mod(&mods, LDAP_MOD_ADD, get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), 
		domain_name);

	/* If we don't have an entry, then ask secrets.tdb for what it thinks.  
	   It may choose to make it up */

	sid_to_string(sid_string, get_global_sam_sid());
	smbldap_set_mod(&mods, LDAP_MOD_ADD, get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOM_SID), sid_string);

	slprintf(algorithmic_rid_base_string, sizeof(algorithmic_rid_base_string) - 1, "%i", algorithmic_rid_base());
	smbldap_set_mod(&mods, LDAP_MOD_ADD, get_attr_key2string(dominfo_attr_list, LDAP_ATTR_ALGORITHMIC_RID_BASE), 
			algorithmic_rid_base_string);
	smbldap_set_mod(&mods, LDAP_MOD_ADD, "objectclass", LDAP_OBJ_DOMINFO);
	
	/* add the sambaNext[User|Group]Rid attributes if the idmap ranges are set.
	   TODO: fix all the places where the line between idmap and normal operations
	   needed by smbd gets fuzzy   --jerry 2003-08-11                              */
	
	if ( lp_idmap_uid(&u_low, &u_high) && lp_idmap_gid(&g_low, &g_high)
		&& get_free_rid_range(&rid_low, &rid_high) ) 
	{
		fstring rid_str;
		
		fstr_sprintf( rid_str, "%i", rid_high|USER_RID_TYPE );
		DEBUG(10,("setting next available user rid [%s]\n", rid_str));
		smbldap_set_mod(&mods, LDAP_MOD_ADD, 
			get_attr_key2string(dominfo_attr_list, LDAP_ATTR_NEXT_USERRID), 
			rid_str);
			
		fstr_sprintf( rid_str, "%i", rid_high|GROUP_RID_TYPE );
		DEBUG(10,("setting next available group rid [%s]\n", rid_str));
		smbldap_set_mod(&mods, LDAP_MOD_ADD, 
			get_attr_key2string(dominfo_attr_list, LDAP_ATTR_NEXT_GROUPRID), 
			rid_str);
		
        }


	switch(ldap_op)
	{
	case LDAP_MOD_ADD: 
		rc = smbldap_add(ldap_state, dn, mods);
		break;
	case LDAP_MOD_REPLACE: 
		rc = smbldap_modify(ldap_state, dn, mods);
		break;
	default: 	
		DEBUG(0,("Wrong LDAP operation type: %d!\n", ldap_op));
		return NT_STATUS_INVALID_PARAMETER;
	}
	
	if (rc!=LDAP_SUCCESS) {
		char *ld_error = NULL;
		ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING, &ld_error);
		DEBUG(1,("failed to %s domain dn= %s with: %s\n\t%s\n",
		       ldap_op == LDAP_MOD_ADD ? "add" : "modify",
		       dn, ldap_err2string(rc),
		       ld_error?ld_error:"unknown"));
		SAFE_FREE(ld_error);

		ldap_mods_free(mods, True);
		return NT_STATUS_UNSUCCESSFUL;
	}

	DEBUG(2,("added: domain = %s in the LDAP database\n", domain_name));
	ldap_mods_free(mods, True);
	return NT_STATUS_OK;
}

/**********************************************************************
Search for the domain info entry
*********************************************************************/
NTSTATUS smbldap_search_domain_info(struct smbldap_state *ldap_state,
                                    LDAPMessage ** result, const char *domain_name,
                                    BOOL try_add)
{
	NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
	pstring filter;
	int rc;
	char **attr_list;
	int count;

	pstr_sprintf(filter, "(&(objectClass=%s)(%s=%s))",
		LDAP_OBJ_DOMINFO,
		get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), 
		domain_name);

	DEBUG(2, ("Searching for:[%s]\n", filter));


	attr_list = get_attr_list( dominfo_attr_list );
	rc = smbldap_search_suffix(ldap_state, filter, attr_list , result);
	free_attr_list( attr_list );

	if (rc != LDAP_SUCCESS) {
		DEBUG(2,("Problem during LDAPsearch: %s\n", ldap_err2string (rc)));
		DEBUG(2,("Query was: %s, %s\n", lp_ldap_suffix(), filter));
	} else if (ldap_count_entries(ldap_state->ldap_struct, *result) < 1) {
		DEBUG(3, ("Got no domain info entries for domain\n"));
		ldap_msgfree(*result);
		*result = NULL;
		if (try_add && NT_STATUS_IS_OK(ret = add_new_domain_info(ldap_state, domain_name))) {
			return smbldap_search_domain_info(ldap_state, result, domain_name, False);
		} 
		else {
			DEBUG(0, ("Adding domain info for %s failed with %s\n", 
				domain_name, nt_errstr(ret)));
			return ret;
		}
	} else if ((count = ldap_count_entries(ldap_state->ldap_struct, *result)) > 1) {
		DEBUG(0, ("Got too many (%d) domain info entries for domain %s\n",
			  count, domain_name));
		ldap_msgfree(*result);
		*result = NULL;
		return ret;
	} else {
		return NT_STATUS_OK;
	}
	
	return ret;
}

/*******************************************************************
 Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
********************************************************************/

char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
{
	char *utf8_dn, *unix_dn;

	utf8_dn = ldap_get_dn(ld, entry);
	if (!utf8_dn) {
		DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
		return NULL;
	}
	if (pull_utf8_allocate(&unix_dn, utf8_dn) == (size_t)-1) {
		DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn));
		return NULL;
	}
	ldap_memfree(utf8_dn);
	return unix_dn;
}