summaryrefslogtreecommitdiff
path: root/source4/wrepl_server/wrepl_apply_records.c
blob: e1b4bcbf39181b937be92ed999bd9e14aa4f035c (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
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
/* 
   Unix SMB/CIFS implementation.
   
   WINS Replication server
   
   Copyright (C) Stefan Metzmacher	2005
   
   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 "smbd/service_task.h"
#include "lib/messaging/irpc.h"
#include "librpc/gen_ndr/ndr_irpc.h"
#include "librpc/gen_ndr/ndr_winsrepl.h"
#include "wrepl_server/wrepl_server.h"
#include "nbt_server/wins/winsdb.h"
#include "libcli/wrepl/winsrepl.h"
#include "system/time.h"

enum _R_ACTION {
	R_INVALID,
	R_DO_REPLACE,
	R_NOT_REPLACE,
	R_DO_PROPAGATE,
	R_DO_CHALLENGE,
	R_DO_RELEASE_DEMAND,
	R_DO_SGROUP_MERGE
};

static const char *_R_ACTION_enum_string(enum _R_ACTION action)
{
	switch (action) {
	case R_INVALID:			return "INVALID";
	case R_DO_REPLACE:		return "REPLACE";
	case R_NOT_REPLACE:		return "NOT_REPLACE";
	case R_DO_PROPAGATE:		return "PROPAGATE";
	case R_DO_CHALLENGE:		return "CHALLEGNE";
	case R_DO_RELEASE_DEMAND:	return "RELEASE_DEMAND";
	case R_DO_SGROUP_MERGE:		return "SGROUP_MERGE";
	}

	return "enum _R_ACTION unknown";
}

#define R_IS_ACTIVE(r) ((r)->state == WREPL_STATE_ACTIVE)
#define R_IS_RELEASED(r) ((r)->state == WREPL_STATE_RELEASED)
#define R_IS_TOMBSTONE(r) ((r)->state == WREPL_STATE_TOMBSTONE)

#define R_IS_UNIQUE(r) ((r)->type == WREPL_TYPE_UNIQUE)
#define R_IS_GROUP(r) ((r)->type == WREPL_TYPE_GROUP)
#define R_IS_SGROUP(r) ((r)->type == WREPL_TYPE_SGROUP)
#define R_IS_MHOMED(r) ((r)->type == WREPL_TYPE_MHOMED)

/* blindly overwrite records from the same owner in all cases */
static enum _R_ACTION replace_same_owner(struct winsdb_record *r1, struct wrepl_name *r2)
{
	/* REPLACE */
	return R_DO_REPLACE;
}

static BOOL r_1_is_subset_of_2_address_list(struct winsdb_record *r1, struct wrepl_name *r2, BOOL check_owners)
{
	uint32_t i,j;
	size_t len = winsdb_addr_list_length(r1->addresses);

	for (i=0; i < len; i++) {
		BOOL found = False;
		for (j=0; j < r2->num_addresses; j++) {
			if (strcmp(r1->addresses[i]->address, r2->addresses[j].address) != 0) {
				continue;
			}

			if (check_owners && strcmp(r1->addresses[i]->wins_owner, r2->addresses[j].owner) != 0) {
				return False;
			}
			found = True;
			break;
		}
		if (!found) return False;
	}

	return True;
}

static BOOL r_1_is_superset_of_2_address_list(struct winsdb_record *r1, struct wrepl_name *r2, BOOL check_owners)
{
	uint32_t i,j;
	size_t len = winsdb_addr_list_length(r1->addresses);

	for (i=0; i < r2->num_addresses; i++) {
		BOOL found = False;
		for (j=0; j < len; j++) {
			if (strcmp(r2->addresses[i].address, r1->addresses[j]->address) != 0) {
				continue;
			}

			if (check_owners && strcmp(r2->addresses[i].owner, r1->addresses[j]->wins_owner) != 0) {
				return False;
			}
			found = True;
			break;
		}
		if (!found) return False;
	}

	return True;
}

static BOOL r_1_is_same_as_2_address_list(struct winsdb_record *r1, struct wrepl_name *r2, BOOL check_owners)
{
	size_t len = winsdb_addr_list_length(r1->addresses);

	if (len != r2->num_addresses) {
		return False;
	}

	return r_1_is_superset_of_2_address_list(r1, r2, check_owners);
}

static BOOL r_contains_addrs_from_owner(struct winsdb_record *r1, const char *owner)
{
	uint32_t i;
	size_t len = winsdb_addr_list_length(r1->addresses);

	for (i=0; i < len; i++) {
		if (strcmp(r1->addresses[i]->wins_owner, owner) == 0) {
			return True;
		}
	}

	return False;
}

/*
UNIQUE,ACTIVE vs. UNIQUE,ACTIVE with different ip(s) => REPLACE
UNIQUE,ACTIVE vs. UNIQUE,TOMBSTONE with different ip(s) => NOT REPLACE
UNIQUE,RELEASED vs. UNIQUE,ACTIVE with different ip(s) => REPLACE
UNIQUE,RELEASED vs. UNIQUE,TOMBSTONE with different ip(s) => REPLACE
UNIQUE,TOMBSTONE vs. UNIQUE,ACTIVE with different ip(s) => REPLACE
UNIQUE,TOMBSTONE vs. UNIQUE,TOMBSTONE with different ip(s) => REPLACE
UNIQUE,ACTIVE vs. GROUP,ACTIVE with different ip(s) => REPLACE
UNIQUE,ACTIVE vs. GROUP,TOMBSTONE with same ip(s) => NOT REPLACE
UNIQUE,RELEASED vs. GROUP,ACTIVE with different ip(s) => REPLACE
UNIQUE,RELEASED vs. GROUP,TOMBSTONE with different ip(s) => REPLACE
UNIQUE,TOMBSTONE vs. GROUP,ACTIVE with different ip(s) => REPLACE
UNIQUE,TOMBSTONE vs. GROUP,TOMBSTONE with different ip(s) => REPLACE
UNIQUE,ACTIVE vs. SGROUP,ACTIVE with same ip(s) => NOT REPLACE
UNIQUE,ACTIVE vs. SGROUP,TOMBSTONE with same ip(s) => NOT REPLACE
UNIQUE,RELEASED vs. SGROUP,ACTIVE with different ip(s) => REPLACE
UNIQUE,RELEASED vs. SGROUP,TOMBSTONE with different ip(s) => REPLACE
UNIQUE,TOMBSTONE vs. SGROUP,ACTIVE with different ip(s) => REPLACE
UNIQUE,TOMBSTONE vs. SGROUP,TOMBSTONE with different ip(s) => REPLACE
UNIQUE,ACTIVE vs. MHOMED,ACTIVE with different ip(s) => REPLACE
UNIQUE,ACTIVE vs. MHOMED,TOMBSTONE with same ip(s) => NOT REPLACE
UNIQUE,RELEASED vs. MHOMED,ACTIVE with different ip(s) => REPLACE
UNIQUE,RELEASED vs. MHOMED,TOMBSTONE with different ip(s) => REPLACE
UNIQUE,TOMBSTONE vs. MHOMED,ACTIVE with different ip(s) => REPLACE
UNIQUE,TOMBSTONE vs. MHOMED,TOMBSTONE with different ip(s) => REPLACE
*/
static enum _R_ACTION replace_unique_replica_vs_X_replica(struct winsdb_record *r1, struct wrepl_name *r2)
{
	if (!R_IS_ACTIVE(r1)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	if (!R_IS_SGROUP(r2) && R_IS_ACTIVE(r2)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	/* NOT REPLACE */
	return R_NOT_REPLACE;
}

/*
GROUP,ACTIVE vs. UNIQUE,ACTIVE with same ip(s) => NOT REPLACE
GROUP,ACTIVE vs. UNIQUE,TOMBSTONE with same ip(s) => NOT REPLACE
GROUP,RELEASED vs. UNIQUE,ACTIVE with same ip(s) => NOT REPLACE
GROUP,RELEASED vs. UNIQUE,TOMBSTONE with same ip(s) => NOT REPLACE
GROUP,TOMBSTONE vs. UNIQUE,ACTIVE with same ip(s) => NOT REPLACE
GROUP,TOMBSTONE vs. UNIQUE,TOMBSTONE with same ip(s) => NOT REPLACE
GROUP,ACTIVE vs. GROUP,ACTIVE with same ip(s) => NOT REPLACE
GROUP,ACTIVE vs. GROUP,TOMBSTONE with same ip(s) => NOT REPLACE
GROUP,RELEASED vs. GROUP,ACTIVE with different ip(s) => REPLACE
GROUP,RELEASED vs. GROUP,TOMBSTONE with different ip(s) => REPLACE
GROUP,TOMBSTONE vs. GROUP,ACTIVE with different ip(s) => REPLACE
GROUP,TOMBSTONE vs. GROUP,TOMBSTONE with different ip(s) => REPLACE
GROUP,ACTIVE vs. SGROUP,ACTIVE with same ip(s) => NOT REPLACE
GROUP,ACTIVE vs. SGROUP,TOMBSTONE with same ip(s) => NOT REPLACE
GROUP,RELEASED vs. SGROUP,ACTIVE with different ip(s) => REPLACE
GROUP,RELEASED vs. SGROUP,TOMBSTONE with same ip(s) => NOT REPLACE
GROUP,TOMBSTONE vs. SGROUP,ACTIVE with different ip(s) => REPLACE
GROUP,TOMBSTONE vs. SGROUP,TOMBSTONE with different ip(s) => REPLACE
GROUP,ACTIVE vs. MHOMED,ACTIVE with same ip(s) => NOT REPLACE
GROUP,ACTIVE vs. MHOMED,TOMBSTONE with same ip(s) => NOT REPLACE
GROUP,RELEASED vs. MHOMED,ACTIVE with same ip(s) => NOT REPLACE
GROUP,RELEASED vs. MHOMED,TOMBSTONE with same ip(s) => NOT REPLACE
GROUP,TOMBSTONE vs. MHOMED,ACTIVE with different ip(s) => REPLACE
GROUP,TOMBSTONE vs. MHOMED,TOMBSTONE with different ip(s) => REPLACE
*/
static enum _R_ACTION replace_group_replica_vs_X_replica(struct winsdb_record *r1, struct wrepl_name *r2)
{
	if (!R_IS_ACTIVE(r1) && R_IS_GROUP(r2)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	if (R_IS_TOMBSTONE(r1) && !R_IS_UNIQUE(r2)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	/* NOT REPLACE */
	return R_NOT_REPLACE;
}

/*
SGROUP,ACTIVE vs. UNIQUE,ACTIVE with same ip(s) => NOT REPLACE
SGROUP,ACTIVE vs. UNIQUE,TOMBSTONE with same ip(s) => NOT REPLACE
SGROUP,RELEASED vs. UNIQUE,ACTIVE with different ip(s) => REPLACE
SGROUP,RELEASED vs. UNIQUE,TOMBSTONE with different ip(s) => REPLACE
SGROUP,TOMBSTONE vs. UNIQUE,ACTIVE with different ip(s) => REPLACE
SGROUP,TOMBSTONE vs. UNIQUE,TOMBSTONE with different ip(s) => REPLACE
SGROUP,ACTIVE vs. GROUP,ACTIVE with same ip(s) => NOT REPLACE
SGROUP,ACTIVE vs. GROUP,TOMBSTONE with same ip(s) => NOT REPLACE
SGROUP,RELEASED vs. GROUP,ACTIVE with different ip(s) => REPLACE
SGROUP,RELEASED vs. GROUP,TOMBSTONE with different ip(s) => REPLACE
SGROUP,TOMBSTONE vs. GROUP,ACTIVE with different ip(s) => REPLACE
SGROUP,TOMBSTONE vs. GROUP,TOMBSTONE with different ip(s) => REPLACE
SGROUP,RELEASED vs. SGROUP,ACTIVE with different ip(s) => REPLACE
SGROUP,RELEASED vs. SGROUP,TOMBSTONE with different ip(s) => REPLACE
SGROUP,TOMBSTONE vs. SGROUP,ACTIVE with different ip(s) => REPLACE
SGROUP,TOMBSTONE vs. SGROUP,TOMBSTONE with different ip(s) => REPLACE
SGROUP,ACTIVE vs. MHOMED,ACTIVE with same ip(s) => NOT REPLACE
SGROUP,ACTIVE vs. MHOMED,TOMBSTONE with same ip(s) => NOT REPLACE
SGROUP,RELEASED vs. MHOMED,ACTIVE with different ip(s) => REPLACE
SGROUP,RELEASED vs. MHOMED,TOMBSTONE with different ip(s) => REPLACE
SGROUP,TOMBSTONE vs. MHOMED,ACTIVE with different ip(s) => REPLACE
SGROUP,TOMBSTONE vs. MHOMED,TOMBSTONE with different ip(s) => REPLACE

SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4 vs. B:A_3_4 => NOT REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4 vs. B:NULL => NOT REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4_X_3_4 vs. B:A_3_4 => NOT REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:B_3_4 vs. B:A_3_4 => REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4 vs. B:A_3_4_OWNER_B => REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4_OWNER_B vs. B:A_3_4 => REPLACE

SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4 vs. B:B_3_4 => C:A_3_4_B_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:B_3_4_X_3_4 vs. B:A_3_4 => B:A_3_4_X_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:X_3_4 vs. B:A_3_4 => C:A_3_4_X_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4_X_3_4 vs. B:A_3_4_OWNER_B => B:A_3_4_OWNER_B_X_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:B_3_4_X_3_4 vs. B:B_3_4_X_1_2 => C:B_3_4_X_1_2_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:B_3_4_X_3_4 vs. B:NULL => B:X_3_4 => SGROUP_MERGE

 
this is a bit strange, incoming tombstone replicas always replace old replicas:

SGROUP,ACTIVE vs. SGROUP,TOMBSTONE A:B_3_4_X_3_4 vs. B:NULL => B:NULL => REPLACE
SGROUP,ACTIVE vs. SGROUP,TOMBSTONE A:B_3_4_X_3_4 vs. B:A_3_4 => B:A_3_4 => REPLACE
SGROUP,ACTIVE vs. SGROUP,TOMBSTONE A:B_3_4_X_3_4 vs. B:B_3_4 => B:B_3_4 => REPLACE
SGROUP,ACTIVE vs. SGROUP,TOMBSTONE A:B_3_4_X_3_4 vs. B:B_3_4_X_3_4 => B:B_3_4_X_3_4 => REPLACE
*/
static enum _R_ACTION replace_sgroup_replica_vs_X_replica(struct winsdb_record *r1, struct wrepl_name *r2)
{
	if (!R_IS_ACTIVE(r1)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	if (!R_IS_SGROUP(r2)) {
		/* NOT REPLACE */
		return R_NOT_REPLACE;
	}

	/*
	 * this is strange, but correct
	 * the incoming tombstone replace the current active
	 * record
	 */
	if (!R_IS_ACTIVE(r2)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	if (r2->num_addresses == 0) {
		if (r_contains_addrs_from_owner(r1, r2->owner)) {
			/* not handled here: MERGE */
			return R_DO_SGROUP_MERGE;
		}

		/* NOT REPLACE */
		return R_NOT_REPLACE;
	}

	if (r_1_is_superset_of_2_address_list(r1, r2, True)) {
		/* NOT REPLACE */
		return R_NOT_REPLACE;
	}

	if (r_1_is_same_as_2_address_list(r1, r2, False)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	/* not handled here: MERGE */
	return R_DO_SGROUP_MERGE;
}

/*
MHOMED,ACTIVE vs. UNIQUE,ACTIVE with different ip(s) => REPLACE
MHOMED,ACTIVE vs. UNIQUE,TOMBSTONE with same ip(s) => NOT REPLACE
MHOMED,RELEASED vs. UNIQUE,ACTIVE with different ip(s) => REPLACE
MHOMED,RELEASED vs. UNIQUE,TOMBSTONE with different ip(s) => REPLACE
MHOMED,TOMBSTONE vs. UNIQUE,ACTIVE with different ip(s) => REPLACE
MHOMED,TOMBSTONE vs. UNIQUE,TOMBSTONE with different ip(s) => REPLACE
MHOMED,ACTIVE vs. GROUP,ACTIVE with different ip(s) => REPLACE
MHOMED,ACTIVE vs. GROUP,TOMBSTONE with same ip(s) => NOT REPLACE
MHOMED,RELEASED vs. GROUP,ACTIVE with different ip(s) => REPLACE
MHOMED,RELEASED vs. GROUP,TOMBSTONE with different ip(s) => REPLACE
MHOMED,TOMBSTONE vs. GROUP,ACTIVE with different ip(s) => REPLACE
MHOMED,TOMBSTONE vs. GROUP,TOMBSTONE with different ip(s) => REPLACE
MHOMED,ACTIVE vs. SGROUP,ACTIVE with same ip(s) => NOT REPLACE
MHOMED,ACTIVE vs. SGROUP,TOMBSTONE with same ip(s) => NOT REPLACE
MHOMED,RELEASED vs. SGROUP,ACTIVE with different ip(s) => REPLACE
MHOMED,RELEASED vs. SGROUP,TOMBSTONE with different ip(s) => REPLACE
MHOMED,TOMBSTONE vs. SGROUP,ACTIVE with different ip(s) => REPLACE
MHOMED,TOMBSTONE vs. SGROUP,TOMBSTONE with different ip(s) => REPLACE
MHOMED,ACTIVE vs. MHOMED,ACTIVE with different ip(s) => REPLACE
MHOMED,ACTIVE vs. MHOMED,TOMBSTONE with same ip(s) => NOT REPLACE
MHOMED,RELEASED vs. MHOMED,ACTIVE with different ip(s) => REPLACE
MHOMED,RELEASED vs. MHOMED,TOMBSTONE with different ip(s) => REPLACE
MHOMED,TOMBSTONE vs. MHOMED,ACTIVE with different ip(s) => REPLACE
MHOMED,TOMBSTONE vs. MHOMED,TOMBSTONE with different ip(s) => REPLACE
*/
static enum _R_ACTION replace_mhomed_replica_vs_X_replica(struct winsdb_record *r1, struct wrepl_name *r2)
{
	if (!R_IS_ACTIVE(r1)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	if (!R_IS_SGROUP(r2) && R_IS_ACTIVE(r2)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	/* NOT REPLACE */
	return R_NOT_REPLACE;
}

/*
active:
_UA_UA_SI_U<00> => REPLACE
_UA_UA_DI_P<00> => NOT REPLACE
_UA_UA_DI_O<00> => NOT REPLACE
_UA_UA_DI_N<00> => REPLACE
_UA_UT_SI_U<00> => NOT REPLACE
_UA_UT_DI_U<00> => NOT REPLACE
_UA_GA_SI_R<00> => REPLACE
_UA_GA_DI_R<00> => REPLACE
_UA_GT_SI_U<00> => NOT REPLACE
_UA_GT_DI_U<00> => NOT REPLACE
_UA_SA_SI_R<00> => REPLACE
_UA_SA_DI_R<00> => REPLACE
_UA_ST_SI_U<00> => NOT REPLACE
_UA_ST_DI_U<00> => NOT REPLACE
_UA_MA_SI_U<00> => REPLACE
_UA_MA_SP_U<00> => REPLACE
_UA_MA_DI_P<00> => NOT REPLACE
_UA_MA_DI_O<00> => NOT REPLACE
_UA_MA_DI_N<00> => REPLACE
_UA_MT_SI_U<00> => NOT REPLACE
_UA_MT_DI_U<00> => NOT REPLACE
Test Replica vs. owned active: some more UNIQUE,MHOMED combinations
_UA_UA_DI_A<00> => MHOMED_MERGE
_UA_MA_DI_A<00> => MHOMED_MERGE

released:
_UR_UA_SI<00> => REPLACE
_UR_UA_DI<00> => REPLACE
_UR_UT_SI<00> => REPLACE
_UR_UT_DI<00> => REPLACE
_UR_GA_SI<00> => REPLACE
_UR_GA_DI<00> => REPLACE
_UR_GT_SI<00> => REPLACE
_UR_GT_DI<00> => REPLACE
_UR_SA_SI<00> => REPLACE
_UR_SA_DI<00> => REPLACE
_UR_ST_SI<00> => REPLACE
_UR_ST_DI<00> => REPLACE
_UR_MA_SI<00> => REPLACE
_UR_MA_DI<00> => REPLACE
_UR_MT_SI<00> => REPLACE
_UR_MT_DI<00> => REPLACE
*/
static enum _R_ACTION replace_unique_owned_vs_X_replica(struct winsdb_record *r1, struct wrepl_name *r2)
{
	if (!R_IS_ACTIVE(r1)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	if (!R_IS_ACTIVE(r2)) {
		/* NOT REPLACE, and PROPAGATE */
		return R_DO_PROPAGATE;
	}

	if (R_IS_GROUP(r2) || R_IS_SGROUP(r2)) {
		/* REPLACE and send a release demand to the old name owner */
		return R_DO_RELEASE_DEMAND;
	}

	/* 
	 * here we only have unique,active,owned vs.
	 * is unique,active,replica or mhomed,active,replica
	 */

	if (r_1_is_subset_of_2_address_list(r1, r2, False)) {
		/* 
		 * if r1 has a subset(or same) of the addresses of r2
		 * <=>
		 * if r2 has a superset(or same) of the addresses of r1
		 *
		 * then replace the record
		 */
		return R_DO_REPLACE;
	}

	/*
	 * in any other case, we need to do
	 * a name request to the old name holder
	 * to see if it's still there...
	 */
	return R_DO_CHALLENGE;
}

/*
active:
_GA_UA_SI_U<00> => NOT REPLACE
_GA_UA_DI_U<00> => NOT REPLACE
_GA_UT_SI_U<00> => NOT REPLACE
_GA_UT_DI_U<00> => NOT REPLACE
_GA_GA_SI_U<00> => REPLACE
_GA_GA_DI_U<00> => REPLACE
_GA_GT_SI_U<00> => NOT REPLACE
_GA_GT_DI_U<00> => NOT REPLACE
_GA_SA_SI_U<00> => NOT REPLACE
_GA_SA_DI_U<00> => NOT REPLACE
_GA_ST_SI_U<00> => NOT REPLACE
_GA_ST_DI_U<00> => NOT REPLACE
_GA_MA_SI_U<00> => NOT REPLACE
_GA_MA_DI_U<00> => NOT REPLACE
_GA_MT_SI_U<00> => NOT REPLACE
_GA_MT_DI_U<00> => NOT REPLACE

released:
_GR_UA_SI<00> => NOT REPLACE
_GR_UA_DI<00> => NOT REPLACE
_GR_UT_SI<00> => NOT REPLACE
_GR_UT_DI<00> => NOT REPLACE
_GR_GA_SI<00> => REPLACE
_GR_GA_DI<00> => REPLACE
_GR_GT_SI<00> => REPLACE
_GR_GT_DI<00> => REPLACE
_GR_SA_SI<00> => NOT REPLACE
_GR_SA_DI<00> => NOT REPLACE
_GR_ST_SI<00> => NOT REPLACE
_GR_ST_DI<00> => NOT REPLACE
_GR_MA_SI<00> => NOT REPLACE
_GR_MA_DI<00> => NOT REPLACE
_GR_MT_SI<00> => NOT REPLACE
_GR_MT_DI<00> => NOT REPLACE
*/
static enum _R_ACTION replace_group_owned_vs_X_replica(struct winsdb_record *r1, struct wrepl_name *r2)
{
	if (R_IS_GROUP(r1) && R_IS_GROUP(r2)) {
		if (!R_IS_ACTIVE(r1) || R_IS_ACTIVE(r2)) {
			/* REPLACE */
			return R_DO_REPLACE;
		}
	}

	/* NOT REPLACE, but PROPAGATE */
	return R_DO_PROPAGATE;
}

/*
active (not sgroup vs. sgroup yet!):
_SA_UA_SI_U<1c> => NOT REPLACE
_SA_UA_DI_U<1c> => NOT REPLACE
_SA_UT_SI_U<1c> => NOT REPLACE
_SA_UT_DI_U<1c> => NOT REPLACE
_SA_GA_SI_U<1c> => NOT REPLACE
_SA_GA_DI_U<1c> => NOT REPLACE
_SA_GT_SI_U<1c> => NOT REPLACE
_SA_GT_DI_U<1c> => NOT REPLACE
_SA_MA_SI_U<1c> => NOT REPLACE
_SA_MA_DI_U<1c> => NOT REPLACE
_SA_MT_SI_U<1c> => NOT REPLACE
_SA_MT_DI_U<1c> => NOT REPLACE

Test Replica vs. owned active: SGROUP vs. SGROUP tests
_SA_SA_DI_U<1c> => SGROUP_MERGE
_SA_SA_SI_U<1c> => SGROUP_MERGE
_SA_SA_SP_U<1c> => SGROUP_MERGE
_SA_SA_SB_U<1c> => SGROUP_MERGE
_SA_ST_DI_U<1c> => NOT REPLACE
_SA_ST_SI_U<1c> => NOT REPLACE
_SA_ST_SP_U<1c> => NOT REPLACE
_SA_ST_SB_U<1c> => NOT REPLACE

SGROUP,ACTIVE vs. SGROUP,* is not handled here!

released:
_SR_UA_SI<1c> => REPLACE
_SR_UA_DI<1c> => REPLACE
_SR_UT_SI<1c> => REPLACE
_SR_UT_DI<1c> => REPLACE
_SR_GA_SI<1c> => REPLACE
_SR_GA_DI<1c> => REPLACE
_SR_GT_SI<1c> => REPLACE
_SR_GT_DI<1c> => REPLACE
_SR_SA_SI<1c> => REPLACE
_SR_SA_DI<1c> => REPLACE
_SR_ST_SI<1c> => REPLACE
_SR_ST_DI<1c> => REPLACE
_SR_MA_SI<1c> => REPLACE
_SR_MA_DI<1c> => REPLACE
_SR_MT_SI<1c> => REPLACE
_SR_MT_DI<1c> => REPLACE
*/
static enum _R_ACTION replace_sgroup_owned_vs_X_replica(struct winsdb_record *r1, struct wrepl_name *r2)
{
	if (!R_IS_ACTIVE(r1)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	if (!R_IS_SGROUP(r2) || !R_IS_ACTIVE(r2)) {
		/* NOT REPLACE, but PROPAGATE */
		return R_DO_PROPAGATE;
	}

	if (r_1_is_same_as_2_address_list(r1, r2, True)) {
		/*
		 * as we're the old owner and the addresses and their
		 * owners are identical
		 */
		return R_NOT_REPLACE;
	}

	/* not handled here: MERGE */
	return R_DO_SGROUP_MERGE;
}

/*
active:
_MA_UA_SI_U<00> => REPLACE
_MA_UA_DI_P<00> => NOT REPLACE
_MA_UA_DI_O<00> => NOT REPLACE
_MA_UA_DI_N<00> => REPLACE
_MA_UT_SI_U<00> => NOT REPLACE
_MA_UT_DI_U<00> => NOT REPLACE
_MA_GA_SI_R<00> => REPLACE
_MA_GA_DI_R<00> => REPLACE
_MA_GT_SI_U<00> => NOT REPLACE
_MA_GT_DI_U<00> => NOT REPLACE
_MA_SA_SI_R<00> => REPLACE
_MA_SA_DI_R<00> => REPLACE
_MA_ST_SI_U<00> => NOT REPLACE
_MA_ST_DI_U<00> => NOT REPLACE
_MA_MA_SI_U<00> => REPLACE
_MA_MA_SP_U<00> => REPLACE
_MA_MA_DI_P<00> => NOT REPLACE
_MA_MA_DI_O<00> => NOT REPLACE
_MA_MA_DI_N<00> => REPLACE
_MA_MT_SI_U<00> => NOT REPLACE
_MA_MT_DI_U<00> => NOT REPLACE
Test Replica vs. owned active: some more MHOMED combinations
_MA_MA_SP_U<00> => REPLACE
_MA_MA_SM_U<00> => REPLACE
_MA_MA_SB_P<00> => MHOMED_MERGE
_MA_MA_SB_A<00> => MHOMED_MERGE
_MA_MA_SB_PRA<00> => NOT REPLACE
_MA_MA_SB_O<00> => NOT REPLACE
_MA_MA_SB_N<00> => REPLACE
Test Replica vs. owned active: some more UNIQUE,MHOMED combinations
_MA_UA_SB_P<00> => MHOMED_MERGE

released:
_MR_UA_SI<00> => REPLACE
_MR_UA_DI<00> => REPLACE
_MR_UT_SI<00> => REPLACE
_MR_UT_DI<00> => REPLACE
_MR_GA_SI<00> => REPLACE
_MR_GA_DI<00> => REPLACE
_MR_GT_SI<00> => REPLACE
_MR_GT_DI<00> => REPLACE
_MR_SA_SI<00> => REPLACE
_MR_SA_DI<00> => REPLACE
_MR_ST_SI<00> => REPLACE
_MR_ST_DI<00> => REPLACE
_MR_MA_SI<00> => REPLACE
_MR_MA_DI<00> => REPLACE
_MR_MT_SI<00> => REPLACE
_MR_MT_DI<00> => REPLACE
*/
static enum _R_ACTION replace_mhomed_owned_vs_X_replica(struct winsdb_record *r1, struct wrepl_name *r2)
{
	if (!R_IS_ACTIVE(r1)) {
		/* REPLACE */
		return R_DO_REPLACE;
	}

	if (!R_IS_ACTIVE(r2)) {
		/* NOT REPLACE, but PROPAGATE */
		return R_DO_PROPAGATE;
	}

	if (R_IS_GROUP(r2) || R_IS_SGROUP(r2)) {
		/* REPLACE and send a release demand to the old name owner */
		return R_DO_RELEASE_DEMAND;
	}

	/* 
	 * here we only have mhomed,active,owned vs.
	 * is unique,active,replica or mhomed,active,replica
	 */

	if (r_1_is_subset_of_2_address_list(r1, r2, False)) {
		/* 
		 * if r1 has a subset(or same) of the addresses of r2
		 * <=>
		 * if r2 has a superset(or same) of the addresses of r1
		 *
		 * then replace the record
		 */
		return R_DO_REPLACE;
	}

	/*
	 * in any other case, we need to do
	 * a name request to the old name holder
	 * to see if it's still there...
	 */
	return R_DO_CHALLENGE;
}

static NTSTATUS r_do_add(struct wreplsrv_partner *partner,
			 TALLOC_CTX *mem_ctx,
			 struct wrepl_wins_owner *owner,
			 struct wrepl_name *replica)
{
	struct winsdb_record *rec;
	uint32_t i;
	uint8_t ret;

	rec = talloc(mem_ctx, struct winsdb_record);
	NT_STATUS_HAVE_NO_MEMORY(rec);

	rec->name	= &replica->name;
	rec->type	= replica->type;
	rec->state	= replica->state;
	rec->node	= replica->node;
	rec->is_static	= replica->is_static;
	rec->expire_time= time(NULL) + partner->service->config.verify_interval;
	rec->version	= replica->version_id;
	rec->wins_owner	= replica->owner;
	rec->addresses	= winsdb_addr_list_make(rec);
	NT_STATUS_HAVE_NO_MEMORY(rec->addresses);
	rec->registered_by = NULL;

	for (i=0; i < replica->num_addresses; i++) {
		/* TODO: find out if rec->expire_time is correct here */
		rec->addresses = winsdb_addr_list_add(partner->service->wins_db,
						      rec, rec->addresses,
						      replica->addresses[i].address,
						      replica->addresses[i].owner,
						      rec->expire_time,
						      False);
		NT_STATUS_HAVE_NO_MEMORY(rec->addresses);
	}

	ret = winsdb_add(partner->service->wins_db, rec, 0);
	if (ret != NBT_RCODE_OK) {
		DEBUG(0,("Failed to add record %s: %u\n",
			nbt_name_string(mem_ctx, &replica->name), ret));
		return NT_STATUS_FOOBAR;
	}

	DEBUG(4,("added record %s\n",
		nbt_name_string(mem_ctx, &replica->name)));

	return NT_STATUS_OK;
}

static NTSTATUS r_do_replace(struct wreplsrv_partner *partner,
			     TALLOC_CTX *mem_ctx,
			     struct winsdb_record *rec,
			     struct wrepl_wins_owner *owner,
			     struct wrepl_name *replica)
{
	uint32_t i;
	uint8_t ret;

	rec->name	= &replica->name;
	rec->type	= replica->type;
	rec->state	= replica->state;
	rec->node	= replica->node;
	rec->is_static	= replica->is_static;
	rec->expire_time= time(NULL) + partner->service->config.verify_interval;
	rec->version	= replica->version_id;
	rec->wins_owner	= replica->owner;
	rec->addresses	= winsdb_addr_list_make(rec);
	NT_STATUS_HAVE_NO_MEMORY(rec->addresses);
	rec->registered_by = NULL;

	for (i=0; i < replica->num_addresses; i++) {
		/* TODO: find out if rec->expire_time is correct here */
		rec->addresses = winsdb_addr_list_add(partner->service->wins_db,
						      rec, rec->addresses,
						      replica->addresses[i].address,
						      replica->addresses[i].owner,
						      rec->expire_time,
						      False);
		NT_STATUS_HAVE_NO_MEMORY(rec->addresses);
	}

	ret = winsdb_modify(partner->service->wins_db, rec, 0);
	if (ret != NBT_RCODE_OK) {
		DEBUG(0,("Failed to replace record %s: %u\n",
			nbt_name_string(mem_ctx, &replica->name), ret));
		return NT_STATUS_FOOBAR;
	}

	DEBUG(4,("replaced record %s\n",
		nbt_name_string(mem_ctx, &replica->name)));

	return NT_STATUS_OK;
}

static NTSTATUS r_not_replace(struct wreplsrv_partner *partner,
			      TALLOC_CTX *mem_ctx,
			      struct winsdb_record *rec,
			      struct wrepl_wins_owner *owner,
			      struct wrepl_name *replica)
{
	DEBUG(4,("not replace record %s\n",
		 nbt_name_string(mem_ctx, &replica->name)));
	return NT_STATUS_OK;
}

static NTSTATUS r_do_propagate(struct wreplsrv_partner *partner,
			       TALLOC_CTX *mem_ctx,
			       struct winsdb_record *rec,
			       struct wrepl_wins_owner *owner,
			       struct wrepl_name *replica)
{
	uint8_t ret;
	uint32_t modify_flags;

	/*
	 * allocate a new version id for the record to that it'll be replicated
	 */
	modify_flags	= WINSDB_FLAG_ALLOC_VERSION | WINSDB_FLAG_TAKE_OWNERSHIP;

	ret = winsdb_modify(partner->service->wins_db, rec, modify_flags);
	if (ret != NBT_RCODE_OK) {
		DEBUG(0,("Failed to replace record %s: %u\n",
			nbt_name_string(mem_ctx, &replica->name), ret));
		return NT_STATUS_FOOBAR;
	}

	DEBUG(4,("propagated record %s\n",
		 nbt_name_string(mem_ctx, &replica->name)));

	return NT_STATUS_OK;
}

/* 
Test Replica vs. owned active: some more MHOMED combinations
_MA_MA_SP_U<00>: C:MHOMED vs. B:ALL => B:ALL => REPLACE
_MA_MA_SM_U<00>: C:MHOMED vs. B:MHOMED => B:MHOMED => REPLACE
_MA_MA_SB_P<00>: C:MHOMED vs. B:BEST (C:MHOMED) => B:MHOMED => MHOMED_MERGE
_MA_MA_SB_A<00>: C:MHOMED vs. B:BEST (C:ALL) => B:MHOMED => MHOMED_MERGE
_MA_MA_SB_PRA<00>: C:MHOMED vs. B:BEST (C:BEST) => C:MHOMED => NOT REPLACE
_MA_MA_SB_O<00>: C:MHOMED vs. B:BEST (B:B_3_4) =>C:MHOMED => NOT REPLACE
_MA_MA_SB_N<00>: C:MHOMED vs. B:BEST (NEGATIVE) => B:BEST => REPLACE
Test Replica vs. owned active: some more UNIQUE,MHOMED combinations
_MA_UA_SB_P<00>: C:MHOMED vs. B:UNIQUE,BEST (C:MHOMED) => B:MHOMED => MHOMED_MERGE
_UA_UA_DI_PRA<00>: C:BEST vs. B:BEST2 (C:BEST2,LR:BEST2) => C:BEST => NOT REPLACE
_UA_UA_DI_A<00>: C:BEST vs. B:BEST2 (C:ALL) => B:MHOMED => MHOMED_MERGE
_UA_MA_DI_A<00>: C:BEST vs. B:BEST2 (C:ALL) => B:MHOMED => MHOMED_MERGE
*/
static NTSTATUS r_do_mhomed_merge(struct wreplsrv_partner *partner,
				  TALLOC_CTX *mem_ctx,
				  struct winsdb_record *rec,
				  struct wrepl_wins_owner *owner,
				  struct wrepl_name *replica)
{
	struct winsdb_record *merge;
	uint32_t i,j;
	uint8_t ret;
	size_t len;

	merge = talloc(mem_ctx, struct winsdb_record);
	NT_STATUS_HAVE_NO_MEMORY(merge);

	merge->name		= &replica->name;
	merge->type		= WREPL_TYPE_MHOMED;
	merge->state		= replica->state;
	merge->node		= replica->node;
	merge->is_static	= replica->is_static;
	merge->expire_time	= time(NULL) + partner->service->config.verify_interval;
	merge->version		= replica->version_id;
	merge->wins_owner	= replica->owner;
	merge->addresses	= winsdb_addr_list_make(merge);
	NT_STATUS_HAVE_NO_MEMORY(merge->addresses);
	merge->registered_by = NULL;

	for (i=0; i < replica->num_addresses; i++) {
		merge->addresses = winsdb_addr_list_add(partner->service->wins_db,
							merge, merge->addresses,
							replica->addresses[i].address,
							replica->addresses[i].owner,
							merge->expire_time,
							False);
		NT_STATUS_HAVE_NO_MEMORY(merge->addresses);
	}

	len = winsdb_addr_list_length(rec->addresses);

	for (i=0; i < len; i++) {
		BOOL found = False;
		for (j=0; j < replica->num_addresses; j++) {
			if (strcmp(replica->addresses[j].address, rec->addresses[i]->address) == 0) {
				found = True;
				break;
			}
		}
		if (found) continue;

		merge->addresses = winsdb_addr_list_add(partner->service->wins_db,
							merge, merge->addresses,
							rec->addresses[i]->address,
							rec->addresses[i]->wins_owner,
							rec->addresses[i]->expire_time,
							False);
		NT_STATUS_HAVE_NO_MEMORY(merge->addresses);
	}

	ret = winsdb_modify(partner->service->wins_db, merge, 0);
	if (ret != NBT_RCODE_OK) {
		DEBUG(0,("Failed to modify mhomed merge record %s: %u\n",
			nbt_name_string(mem_ctx, &replica->name), ret));
		return NT_STATUS_FOOBAR;
	}

	DEBUG(4,("mhomed merge record %s\n",
		nbt_name_string(mem_ctx, &replica->name)));

	return NT_STATUS_OK;
}

struct r_do_challenge_state {
	struct messaging_context *msg_ctx;
	struct wreplsrv_partner *partner;
	struct winsdb_record *rec;
	struct wrepl_wins_owner owner;
	struct wrepl_name replica;
	struct nbtd_proxy_wins_challenge r;
};

static void r_do_late_release_demand_handler(struct irpc_request *ireq)
{
	NTSTATUS status;
	struct r_do_challenge_state *state = talloc_get_type(ireq->async.private,
							     struct r_do_challenge_state);

	status = irpc_call_recv(ireq);
	/* don't care about the result */
	talloc_free(state);
}

static NTSTATUS r_do_late_release_demand(struct r_do_challenge_state *state)
{
	struct irpc_request *ireq;
	uint32_t *nbt_servers;
	struct nbtd_proxy_wins_release_demand r;
	uint32_t i;

	DEBUG(4,("late release demand record %s\n",
		 nbt_name_string(state, &state->replica.name)));

	nbt_servers = irpc_servers_byname(state->msg_ctx, "nbt_server");
	if ((nbt_servers == NULL) || (nbt_servers[0] == 0)) {
		return NT_STATUS_INTERNAL_ERROR;
	}

	r.in.name	= state->replica.name;
	r.in.num_addrs	= state->r.out.num_addrs;
	r.in.addrs	= talloc_array(state, struct nbtd_proxy_wins_addr, r.in.num_addrs);
	NT_STATUS_HAVE_NO_MEMORY(r.in.addrs);
	/* TODO: fix pidl to handle inline ipv4address arrays */
	for (i=0; i < r.in.num_addrs; i++) {
		r.in.addrs[i].addr = state->r.out.addrs[i].addr;
	}

	ireq = IRPC_CALL_SEND(state->msg_ctx, nbt_servers[0],
			      irpc, NBTD_PROXY_WINS_RELEASE_DEMAND,
			      &r, state);
	NT_STATUS_HAVE_NO_MEMORY(ireq);

	ireq->async.fn		= r_do_late_release_demand_handler;
	ireq->async.private	= state;

	return NT_STATUS_OK;
}

/* 
Test Replica vs. owned active: some more MHOMED combinations
_MA_MA_SP_U<00>: C:MHOMED vs. B:ALL => B:ALL => REPLACE
_MA_MA_SM_U<00>: C:MHOMED vs. B:MHOMED => B:MHOMED => REPLACE
_MA_MA_SB_P<00>: C:MHOMED vs. B:BEST (C:MHOMED) => B:MHOMED => MHOMED_MERGE
_MA_MA_SB_A<00>: C:MHOMED vs. B:BEST (C:ALL) => B:MHOMED => MHOMED_MERGE
_MA_MA_SB_PRA<00>: C:MHOMED vs. B:BEST (C:BEST) => C:MHOMED => NOT REPLACE
_MA_MA_SB_O<00>: C:MHOMED vs. B:BEST (B:B_3_4) =>C:MHOMED => NOT REPLACE
_MA_MA_SB_N<00>: C:MHOMED vs. B:BEST (NEGATIVE) => B:BEST => REPLACE
Test Replica vs. owned active: some more UNIQUE,MHOMED combinations
_MA_UA_SB_P<00>: C:MHOMED vs. B:UNIQUE,BEST (C:MHOMED) => B:MHOMED => MHOMED_MERGE
_UA_UA_DI_PRA<00>: C:BEST vs. B:BEST2 (C:BEST2,LR:BEST2) => C:BEST => NOT REPLACE
_UA_UA_DI_A<00>: C:BEST vs. B:BEST2 (C:ALL) => B:MHOMED => MHOMED_MERGE
_UA_MA_DI_A<00>: C:BEST vs. B:BEST2 (C:ALL) => B:MHOMED => MHOMED_MERGE
*/
static void r_do_challenge_handler(struct irpc_request *ireq)
{
	NTSTATUS status;
	struct r_do_challenge_state *state = talloc_get_type(ireq->async.private,
							     struct r_do_challenge_state);
	BOOL old_is_subset = False;
	BOOL new_is_subset = False;
	BOOL found = False;
	uint32_t i,j;
	uint32_t num_rec_addrs;

	status = irpc_call_recv(ireq);

	DEBUG(4,("r_do_challenge_handler: %s: %s\n", 
		 nbt_name_string(state, &state->replica.name), nt_errstr(status)));

	if (NT_STATUS_EQUAL(NT_STATUS_IO_TIMEOUT, status) ||
	    NT_STATUS_EQUAL(NT_STATUS_OBJECT_NAME_NOT_FOUND, status)) {
		r_do_replace(state->partner, state, state->rec, &state->owner, &state->replica);
		talloc_free(state);
		return;
	}

	for (i=0; i < state->replica.num_addresses; i++) {
		found = False;
		new_is_subset = True;
		for (j=0; j < state->r.out.num_addrs; j++) {
			if (strcmp(state->replica.addresses[i].address, state->r.out.addrs[j].addr) == 0) {
				found = True;
				break;
			}
		}
		if (found) continue;

		new_is_subset = False;
		break;
	}

	if (!new_is_subset) {
		r_not_replace(state->partner, state, state->rec, &state->owner, &state->replica);
		talloc_free(state);
		return;
	}

	num_rec_addrs = winsdb_addr_list_length(state->rec->addresses);
	for (i=0; i < num_rec_addrs; i++) {
		found = False;
		old_is_subset = True;
		for (j=0; j < state->r.out.num_addrs; j++) {
			if (strcmp(state->rec->addresses[i]->address, state->r.out.addrs[j].addr) == 0) {
				found = True;
				break;
			}
		}
		if (found) continue;

		old_is_subset = False;
		break;
	}

	if (!old_is_subset) {
		r_do_late_release_demand(state);
		/* 
		 * don't free state here, because we pass it down,
		 * and r_do_late_release_demand() will free it
		 */
		return;
	}

	r_do_mhomed_merge(state->partner, state, state->rec, &state->owner, &state->replica);
	talloc_free(state);
}

static NTSTATUS r_do_challenge(struct wreplsrv_partner *partner,
			       TALLOC_CTX *mem_ctx,
			       struct winsdb_record *rec,
			       struct wrepl_wins_owner *owner,
			       struct wrepl_name *replica)
{
	struct irpc_request *ireq;
	struct r_do_challenge_state *state;
	uint32_t *nbt_servers;
	const char **addrs;
	uint32_t i;

	DEBUG(4,("challenge record %s\n",
		 nbt_name_string(mem_ctx, &replica->name)));

	state = talloc_zero(mem_ctx, struct r_do_challenge_state);
	NT_STATUS_HAVE_NO_MEMORY(state);
	state->msg_ctx	= partner->service->task->msg_ctx;
	state->partner	= partner;
	state->rec	= talloc_steal(state, rec);
	state->owner	= *owner;
	state->replica	= *replica;
	/* some stuff to have valid memory pointers in the async complete function */
	state->replica.name = *state->rec->name;
	talloc_steal(state, replica->owner);
	talloc_steal(state, replica->addresses);

	nbt_servers = irpc_servers_byname(state->msg_ctx, "nbt_server");
	if ((nbt_servers == NULL) || (nbt_servers[0] == 0)) {
		return NT_STATUS_INTERNAL_ERROR;
	}

	state->r.in.name	= *rec->name;
	state->r.in.num_addrs	= winsdb_addr_list_length(rec->addresses);
	state->r.in.addrs	= talloc_array(state, struct nbtd_proxy_wins_addr, state->r.in.num_addrs);
	NT_STATUS_HAVE_NO_MEMORY(state->r.in.addrs);
	/* TODO: fix pidl to handle inline ipv4address arrays */
	addrs			= winsdb_addr_string_list(state->r.in.addrs, rec->addresses);
	NT_STATUS_HAVE_NO_MEMORY(addrs);
	for (i=0; i < state->r.in.num_addrs; i++) {
		state->r.in.addrs[i].addr = addrs[i];
	}

	ireq = IRPC_CALL_SEND(state->msg_ctx, nbt_servers[0],
			      irpc, NBTD_PROXY_WINS_CHALLENGE,
			      &state->r, state);
	NT_STATUS_HAVE_NO_MEMORY(ireq);

	ireq->async.fn		= r_do_challenge_handler;
	ireq->async.private	= state;

	talloc_steal(partner, state);
	return NT_STATUS_OK;
}

static void r_do_release_demand_handler(struct irpc_request *ireq)
{
	NTSTATUS status;
	status = irpc_call_recv(ireq);
	/* don't care about the result */
}

static NTSTATUS r_do_release_demand(struct wreplsrv_partner *partner,
				    TALLOC_CTX *mem_ctx,
				    struct winsdb_record *rec,
				    struct wrepl_wins_owner *owner,
				    struct wrepl_name *replica)
{
	NTSTATUS status;
	struct irpc_request *ireq;
	uint32_t *nbt_servers;
	const char **addrs;
	struct winsdb_addr **addresses;
	struct nbtd_proxy_wins_release_demand r;
	uint32_t i;

	/*
	 * we need to get a reference to the old addresses,
	 * as we need to send a release demand to them after replacing the record
	 * and r_do_replace() will modify rec->addresses
	 */
	addresses = rec->addresses;

	status = r_do_replace(partner, mem_ctx, rec, owner, replica);
	NT_STATUS_NOT_OK_RETURN(status);

	DEBUG(4,("release demand record %s\n",
		 nbt_name_string(mem_ctx, &replica->name)));

	nbt_servers = irpc_servers_byname(partner->service->task->msg_ctx, "nbt_server");
	if ((nbt_servers == NULL) || (nbt_servers[0] == 0)) {
		return NT_STATUS_INTERNAL_ERROR;
	}

	r.in.name	= *rec->name;
	r.in.num_addrs	= winsdb_addr_list_length(addresses);
	r.in.addrs	= talloc_array(partner, struct nbtd_proxy_wins_addr, r.in.num_addrs);
	NT_STATUS_HAVE_NO_MEMORY(r.in.addrs);
	/* TODO: fix pidl to handle inline ipv4address arrays */
	addrs			= winsdb_addr_string_list(r.in.addrs, addresses);
	NT_STATUS_HAVE_NO_MEMORY(addrs);
	for (i=0; i < r.in.num_addrs; i++) {
		r.in.addrs[i].addr = addrs[i];
	}

	ireq = IRPC_CALL_SEND(partner->service->task->msg_ctx, nbt_servers[0],
			      irpc, NBTD_PROXY_WINS_RELEASE_DEMAND,
			      &r, partner);
	NT_STATUS_HAVE_NO_MEMORY(ireq);

	ireq->async.fn		= r_do_release_demand_handler;
	ireq->async.private	= NULL;

	return NT_STATUS_OK;
}

/*
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4 vs. B:A_3_4 => NOT REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4 vs. B:NULL => NOT REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4_X_3_4 vs. B:A_3_4 => NOT REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:B_3_4 vs. B:A_3_4 => REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4 vs. B:A_3_4_OWNER_B => REPLACE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4_OWNER_B vs. B:A_3_4 => REPLACE

SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4 vs. B:B_3_4 => C:A_3_4_B_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:B_3_4_X_3_4 vs. B:A_3_4 => B:A_3_4_X_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:X_3_4 vs. B:A_3_4 => C:A_3_4_X_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:A_3_4_X_3_4 vs. B:A_3_4_OWNER_B => B:A_3_4_OWNER_B_X_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:B_3_4_X_3_4 vs. B:B_3_4_X_1_2 => C:B_3_4_X_1_2_3_4 => SGROUP_MERGE
SGROUP,ACTIVE vs. SGROUP,ACTIVE A:B_3_4_X_3_4 vs. B:NULL => B:X_3_4 => SGROUP_MERGE

Test Replica vs. owned active: SGROUP vs. SGROUP tests
_SA_SA_DI_U<1c> => SGROUP_MERGE
_SA_SA_SI_U<1c> => SGROUP_MERGE
_SA_SA_SP_U<1c> => SGROUP_MERGE
_SA_SA_SB_U<1c> => SGROUP_MERGE
*/
static NTSTATUS r_do_sgroup_merge(struct wreplsrv_partner *partner,
				  TALLOC_CTX *mem_ctx,
				  struct winsdb_record *rec,
				  struct wrepl_wins_owner *owner,
				  struct wrepl_name *replica)
{
	struct winsdb_record *merge;
	uint32_t modify_flags = 0;
	uint32_t i,j;
	uint8_t ret;
	size_t len;
	BOOL changed_old_addrs = False;
	BOOL become_owner = True;

	merge = talloc(mem_ctx, struct winsdb_record);
	NT_STATUS_HAVE_NO_MEMORY(merge);

	merge->name		= &replica->name;
	merge->type		= replica->type;
	merge->state		= replica->state;
	merge->node		= replica->node;
	merge->is_static	= replica->is_static;
	merge->expire_time	= time(NULL) + partner->service->config.verify_interval;
	merge->version		= replica->version_id;
	merge->wins_owner	= replica->owner;
	merge->addresses	= winsdb_addr_list_make(merge);
	NT_STATUS_HAVE_NO_MEMORY(merge->addresses);
	merge->registered_by = NULL;

	len = winsdb_addr_list_length(rec->addresses);

	for (i=0; i < len; i++) {
		BOOL found = False;

		for (j=0; j < replica->num_addresses; j++) {
			if (strcmp(rec->addresses[i]->address, replica->addresses[j].address) != 0) {
				continue;
			}

			found = True;

			if (strcmp(rec->addresses[i]->wins_owner, replica->addresses[j].owner) != 0) {
				changed_old_addrs = True;
				break;
			}
			break;
		}

		/* 
		 * if the address isn't in the replica and is owned by replicas owner,
		 * it won't be added to the merged record
		 */
		if (!found && strcmp(rec->addresses[i]->wins_owner, owner->address) == 0) {
			changed_old_addrs = True;
			continue;
		}

		/*
		 * add the address to the merge result, with the old owner and expire_time,
		 * the owner and expire_time will be overwritten later if the address is
		 * in the replica too
		 */
		merge->addresses = winsdb_addr_list_add(partner->service->wins_db,
							merge, merge->addresses,
							rec->addresses[i]->address,
							rec->addresses[i]->wins_owner,
							rec->addresses[i]->expire_time,
							False);
		NT_STATUS_HAVE_NO_MEMORY(merge->addresses);
	}

	for (i=0; i < replica->num_addresses; i++) {
		merge->addresses = winsdb_addr_list_add(partner->service->wins_db,
							merge, merge->addresses,
							replica->addresses[i].address,
							replica->addresses[i].owner,
							merge->expire_time,
							False);
		NT_STATUS_HAVE_NO_MEMORY(merge->addresses);
	}

	/* we the old addresses change changed we don't become the owner */
	if (changed_old_addrs) {
		become_owner = False;
	}

	/* if we're the owner of the old record, we'll be the owner of the new one too */
	if (strcmp(rec->wins_owner, partner->service->wins_db->local_owner)==0) {
		become_owner = True;
	}

	/*
	 * if the result has no addresses we take the ownership
	 */
	len = winsdb_addr_list_length(merge->addresses);
	if (len == 0) {
		become_owner = True;
	}

	/* 
	 * if addresses of the old record will be changed the replica owner
	 * will be owner of the merge result, otherwise we take the ownership
	 */
	if (become_owner) {
		modify_flags = WINSDB_FLAG_ALLOC_VERSION | WINSDB_FLAG_TAKE_OWNERSHIP;
	}

	ret = winsdb_modify(partner->service->wins_db, merge, modify_flags);
	if (ret != NBT_RCODE_OK) {
		DEBUG(0,("Failed to modify sgroup merge record %s: %u\n",
			nbt_name_string(mem_ctx, &replica->name), ret));
		return NT_STATUS_FOOBAR;
	}

	DEBUG(4,("sgroup merge record %s\n",
		nbt_name_string(mem_ctx, &replica->name)));

	return NT_STATUS_OK;
}

static NTSTATUS wreplsrv_apply_one_record(struct wreplsrv_partner *partner,
					  TALLOC_CTX *mem_ctx,
					  struct wrepl_wins_owner *owner,
					  struct wrepl_name *replica)
{
	NTSTATUS status;
	struct winsdb_record *rec = NULL;
	enum _R_ACTION action = R_INVALID;
	BOOL same_owner = False;
	BOOL replica_vs_replica = False;
	BOOL local_vs_replica = False;

	status = winsdb_lookup(partner->service->wins_db,
			       &replica->name, mem_ctx, &rec);
	if (NT_STATUS_EQUAL(NT_STATUS_OBJECT_NAME_NOT_FOUND, status)) {
		return r_do_add(partner, mem_ctx, owner, replica);
	}
	NT_STATUS_NOT_OK_RETURN(status);

	if (strcmp(rec->wins_owner, partner->service->wins_db->local_owner)==0) {
		local_vs_replica = True;
	} else if (strcmp(rec->wins_owner, owner->address)==0) {
		same_owner = True;
	} else {
		replica_vs_replica = True;
	}

	if (rec->is_static && !same_owner) {
		action = R_NOT_REPLACE;

		/*
		 * if we own the local record, then propagate it back to
		 * the other wins servers.
		 * to prevent ping-pong with other servers, we don't do this
		 * if the replica is static too.
		 *
		 * It seems that w2k3 doesn't do this, but I thing that's a bug
		 * and doing propagation helps to have consistent data on all servers
		 */
		if (local_vs_replica && !replica->is_static) {
			action = R_DO_PROPAGATE;
		}
	} else if (replica->is_static && !rec->is_static && !same_owner) {
		action = R_DO_REPLACE;
	} else if (same_owner) {
		action = replace_same_owner(rec, replica);
	} else if (replica_vs_replica) {
		switch (rec->type) {
		case WREPL_TYPE_UNIQUE:
			action = replace_unique_replica_vs_X_replica(rec, replica);
			break;
		case WREPL_TYPE_GROUP:
			action = replace_group_replica_vs_X_replica(rec, replica);
			break;
		case WREPL_TYPE_SGROUP:
			action = replace_sgroup_replica_vs_X_replica(rec, replica);
			break;
		case WREPL_TYPE_MHOMED:
			action = replace_mhomed_replica_vs_X_replica(rec, replica);
			break;
		}
	} else if (local_vs_replica) {
		switch (rec->type) {
		case WREPL_TYPE_UNIQUE:
			action = replace_unique_owned_vs_X_replica(rec, replica);
			break;
		case WREPL_TYPE_GROUP:
			action = replace_group_owned_vs_X_replica(rec, replica);
			break;
		case WREPL_TYPE_SGROUP:
			action = replace_sgroup_owned_vs_X_replica(rec, replica);
			break;
		case WREPL_TYPE_MHOMED:
			action = replace_mhomed_owned_vs_X_replica(rec, replica);
			break;
		}
	}

	DEBUG(4,("apply record %s: %s\n",
		 nbt_name_string(mem_ctx, &replica->name), _R_ACTION_enum_string(action)));

	switch (action) {
	case R_INVALID: break;
	case R_DO_REPLACE:
		return r_do_replace(partner, mem_ctx, rec, owner, replica);
	case R_NOT_REPLACE:
		return r_not_replace(partner, mem_ctx, rec, owner, replica);
	case R_DO_PROPAGATE:
		return r_do_propagate(partner, mem_ctx, rec, owner, replica);
	case R_DO_CHALLENGE:
		return r_do_challenge(partner, mem_ctx, rec, owner, replica);
	case R_DO_RELEASE_DEMAND:
		return r_do_release_demand(partner, mem_ctx, rec, owner, replica);
	case R_DO_SGROUP_MERGE:
		return r_do_sgroup_merge(partner, mem_ctx, rec, owner, replica);
	}

	return NT_STATUS_INTERNAL_ERROR;
}

NTSTATUS wreplsrv_apply_records(struct wreplsrv_partner *partner, struct wreplsrv_pull_names_io *names_io)
{
	NTSTATUS status;
	uint32_t i;

	DEBUG(4,("apply records count[%u]:owner[%s]:min[%llu]:max[%llu]:partner[%s]\n",
		names_io->out.num_names, names_io->in.owner.address,
		(long long)names_io->in.owner.min_version, 
		(long long)names_io->in.owner.max_version,
		partner->address));

	for (i=0; i < names_io->out.num_names; i++) {
		TALLOC_CTX *tmp_mem = talloc_new(partner);
		NT_STATUS_HAVE_NO_MEMORY(tmp_mem);

		status = wreplsrv_apply_one_record(partner, tmp_mem,
						   &names_io->in.owner,
						   &names_io->out.names[i]);
		talloc_free(tmp_mem);
		NT_STATUS_NOT_OK_RETURN(status);
	}

	status = wreplsrv_add_table(partner->service,
				    partner->service,
				    &partner->service->table,
				    names_io->in.owner.address,
				    names_io->in.owner.max_version);
	NT_STATUS_NOT_OK_RETURN(status);

	return NT_STATUS_OK;
}