summaryrefslogtreecommitdiff
path: root/source3/winbindd/winbindd_cm.c
blob: 9268542da6f71ff8829fb8d664a160773c2af4fa (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
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
/* 
   Unix SMB/CIFS implementation.

   Winbind daemon connection manager

   Copyright (C) Tim Potter                2001
   Copyright (C) Andrew Bartlett           2002
   Copyright (C) Gerald (Jerry) Carter     2003-2005.
   Copyright (C) Volker Lendecke           2004-2005
   Copyright (C) Jeremy Allison		   2006

   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 3 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, see <http://www.gnu.org/licenses/>.
*/

/*
   We need to manage connections to domain controllers without having to
   mess up the main winbindd code with other issues.  The aim of the
   connection manager is to:

       - make connections to domain controllers and cache them
       - re-establish connections when networks or servers go down
       - centralise the policy on connection timeouts, domain controller
	 selection etc
       - manage re-entrancy for when winbindd becomes able to handle
	 multiple outstanding rpc requests

   Why not have connection management as part of the rpc layer like tng?
   Good question.  This code may morph into libsmb/rpc_cache.c or something
   like that but at the moment it's simply staying as part of winbind.	I
   think the TNG architecture of forcing every user of the rpc layer to use
   the connection caching system is a bad idea.	 It should be an optional
   method of using the routines.

   The TNG design is quite good but I disagree with some aspects of the
   implementation. -tpot

 */

/*
   TODO:

     - I'm pretty annoyed by all the make_nmb_name() stuff.  It should be
       moved down into another function.

     - Take care when destroying cli_structs as they can be shared between
       various sam handles.

 */

#include "includes.h"
#include "winbindd.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND

struct dc_name_ip {
	fstring name;
	struct sockaddr_storage ss;
};

extern struct winbindd_methods reconnect_methods;
extern bool override_logfile;

static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain);
static void set_dc_type_and_flags( struct winbindd_domain *domain );
static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
		    struct dc_name_ip **dcs, int *num_dcs);

/****************************************************************
 Child failed to find DC's. Reschedule check.
****************************************************************/

static void msg_failed_to_go_online(struct messaging_context *msg,
				    void *private_data,
				    uint32_t msg_type,
				    struct server_id server_id,
				    DATA_BLOB *data)
{
	struct winbindd_domain *domain;
	const char *domainname = (const char *)data->data;

	if (data->data == NULL || data->length == 0) {
		return;
	}

	DEBUG(5,("msg_fail_to_go_online: received for domain %s.\n", domainname));

	for (domain = domain_list(); domain; domain = domain->next) {
		if (domain->internal) {
			continue;
		}

		if (strequal(domain->name, domainname)) {
			if (domain->online) {
				/* We're already online, ignore. */
				DEBUG(5,("msg_fail_to_go_online: domain %s "
					"already online.\n", domainname));
				continue;
			}

			/* Reschedule the online check. */
			set_domain_offline(domain);
			break;
		}
	}
}

/****************************************************************
 Actually cause a reconnect from a message.
****************************************************************/

static void msg_try_to_go_online(struct messaging_context *msg,
				 void *private_data,
				 uint32_t msg_type,
				 struct server_id server_id,
				 DATA_BLOB *data)
{
	struct winbindd_domain *domain;
	const char *domainname = (const char *)data->data;

	if (data->data == NULL || data->length == 0) {
		return;
	}

	DEBUG(5,("msg_try_to_go_online: received for domain %s.\n", domainname));

	for (domain = domain_list(); domain; domain = domain->next) {
		if (domain->internal) {
			continue;
		}

		if (strequal(domain->name, domainname)) {

			if (domain->online) {
				/* We're already online, ignore. */
				DEBUG(5,("msg_try_to_go_online: domain %s "
					"already online.\n", domainname));
				continue;
			}

			/* This call takes care of setting the online
			   flag to true if we connected, or re-adding
			   the offline handler if false. Bypasses online
			   check so always does network calls. */

			init_dc_connection_network(domain);
			break;
		}
	}
}

/****************************************************************
 Fork a child to try and contact a DC. Do this as contacting a
 DC requires blocking lookups and we don't want to block our
 parent.
****************************************************************/

static bool fork_child_dc_connect(struct winbindd_domain *domain)
{
	struct dc_name_ip *dcs = NULL;
	int num_dcs = 0;
	TALLOC_CTX *mem_ctx = NULL;
	pid_t parent_pid = sys_getpid();

	/* Stop zombies */
	CatchChild();

	if (domain->dc_probe_pid != (pid_t)-1) {
		/*
		 * We might already have a DC probe
		 * child working, check.
		 */
		if (process_exists_by_pid(domain->dc_probe_pid)) {
			DEBUG(10,("fork_child_dc_connect: pid %u already "
				"checking for DC's.\n",
				(unsigned int)domain->dc_probe_pid));
			return true;
		}
		domain->dc_probe_pid = (pid_t)-1;
	}

	domain->dc_probe_pid = sys_fork();

	if (domain->dc_probe_pid == (pid_t)-1) {
		DEBUG(0, ("fork_child_dc_connect: Could not fork: %s\n", strerror(errno)));
		return False;
	}

	if (domain->dc_probe_pid != (pid_t)0) {
		/* Parent */
		messaging_register(winbind_messaging_context(), NULL,
				   MSG_WINBIND_TRY_TO_GO_ONLINE,
				   msg_try_to_go_online);
		messaging_register(winbind_messaging_context(), NULL,
				   MSG_WINBIND_FAILED_TO_GO_ONLINE,
				   msg_failed_to_go_online);
		return True;
	}

	/* Child. */

	/* Leave messages blocked - we will never process one. */

	if (!reinit_after_fork(winbind_messaging_context(), true)) {
		DEBUG(0,("reinit_after_fork() failed\n"));
		messaging_send_buf(winbind_messaging_context(),
				   pid_to_procid(parent_pid),
				   MSG_WINBIND_FAILED_TO_GO_ONLINE,
				   (uint8 *)domain->name,
				   strlen(domain->name)+1);
		_exit(0);
	}

	close_conns_after_fork();

	if (!override_logfile) {
		char *logfile;
		if (asprintf(&logfile, "%s/log.winbindd-dc-connect", get_dyn_LOGFILEBASE()) > 0) {
			lp_set_logfile(logfile);
			SAFE_FREE(logfile);
			reopen_logs();
		}
	}

	mem_ctx = talloc_init("fork_child_dc_connect");
	if (!mem_ctx) {
		DEBUG(0,("talloc_init failed.\n"));
		messaging_send_buf(winbind_messaging_context(),
				   pid_to_procid(parent_pid),
				   MSG_WINBIND_FAILED_TO_GO_ONLINE,
				   (uint8 *)domain->name,
				   strlen(domain->name)+1);
		_exit(0);
	}

	if ((!get_dcs(mem_ctx, domain, &dcs, &num_dcs)) || (num_dcs == 0)) {
		/* Still offline ? Can't find DC's. */
		messaging_send_buf(winbind_messaging_context(),
				   pid_to_procid(parent_pid),
				   MSG_WINBIND_FAILED_TO_GO_ONLINE,
				   (uint8 *)domain->name,
				   strlen(domain->name)+1);
		_exit(0);
	}

	/* We got a DC. Send a message to our parent to get it to
	   try and do the same. */

	messaging_send_buf(winbind_messaging_context(),
			   pid_to_procid(parent_pid),
			   MSG_WINBIND_TRY_TO_GO_ONLINE,
			   (uint8 *)domain->name,
			   strlen(domain->name)+1);
	_exit(0);
}

/****************************************************************
 Handler triggered if we're offline to try and detect a DC.
****************************************************************/

static void check_domain_online_handler(struct event_context *ctx,
					struct timed_event *te,
					const struct timeval *now,
					void *private_data)
{
        struct winbindd_domain *domain =
                (struct winbindd_domain *)private_data;

	DEBUG(10,("check_domain_online_handler: called for domain "
		  "%s (online = %s)\n", domain->name, 
		  domain->online ? "True" : "False" ));

	TALLOC_FREE(domain->check_online_event);

	/* Are we still in "startup" mode ? */

	if (domain->startup && (now->tv_sec > domain->startup_time + 30)) {
		/* No longer in "startup" mode. */
		DEBUG(10,("check_domain_online_handler: domain %s no longer in 'startup' mode.\n",
			domain->name ));
		domain->startup = False;
	}

	/* We've been told to stay offline, so stay
	   that way. */

	if (get_global_winbindd_state_offline()) {
		DEBUG(10,("check_domain_online_handler: domain %s remaining globally offline\n",
			domain->name ));
		return;
	}

	/* Fork a child to test if it can contact a DC. 
	   If it can then send ourselves a message to
	   cause a reconnect. */

	fork_child_dc_connect(domain);
}

/****************************************************************
 If we're still offline setup the timeout check.
****************************************************************/

static void calc_new_online_timeout_check(struct winbindd_domain *domain)
{
	int wbr = lp_winbind_reconnect_delay();

	if (domain->startup) {
		domain->check_online_timeout = 10;
	} else if (domain->check_online_timeout < wbr) {
		domain->check_online_timeout = wbr;
	}
}

/****************************************************************
 Set domain offline and also add handler to put us back online
 if we detect a DC.
****************************************************************/

void set_domain_offline(struct winbindd_domain *domain)
{
	DEBUG(10,("set_domain_offline: called for domain %s\n",
		domain->name ));

	TALLOC_FREE(domain->check_online_event);

	if (domain->internal) {
		DEBUG(3,("set_domain_offline: domain %s is internal - logic error.\n",
			domain->name ));
		return;
	}

	domain->online = False;

	/* Offline domains are always initialized. They're
	   re-initialized when they go back online. */

	domain->initialized = True;

	/* We only add the timeout handler that checks and
	   allows us to go back online when we've not
	   been told to remain offline. */

	if (get_global_winbindd_state_offline()) {
		DEBUG(10,("set_domain_offline: domain %s remaining globally offline\n",
			domain->name ));
		return;
	}

	/* If we're in statup mode, check again in 10 seconds, not in
	   lp_winbind_reconnect_delay() seconds (which is 30 seconds by default). */

	calc_new_online_timeout_check(domain);

	domain->check_online_event = event_add_timed(winbind_event_context(),
						NULL,
						timeval_current_ofs(domain->check_online_timeout,0),
						"check_domain_online_handler",
						check_domain_online_handler,
						domain);

	/* The above *has* to succeed for winbindd to work. */
	if (!domain->check_online_event) {
		smb_panic("set_domain_offline: failed to add online handler");
	}

	DEBUG(10,("set_domain_offline: added event handler for domain %s\n",
		domain->name ));

	/* Send an offline message to the idmap child when our
	   primary domain goes offline */

	if ( domain->primary ) {
		struct winbindd_child *idmap = idmap_child();

		if ( idmap->pid != 0 ) {
			messaging_send_buf(winbind_messaging_context(),
					   pid_to_procid(idmap->pid), 
					   MSG_WINBIND_OFFLINE, 
					   (uint8 *)domain->name, 
					   strlen(domain->name)+1);
		}			
	}

	return;	
}

/****************************************************************
 Set domain online - if allowed.
****************************************************************/

static void set_domain_online(struct winbindd_domain *domain)
{
	struct timeval now;

	DEBUG(10,("set_domain_online: called for domain %s\n",
		domain->name ));

	if (domain->internal) {
		DEBUG(3,("set_domain_online: domain %s is internal - logic error.\n",
			domain->name ));
		return;
	}

	if (get_global_winbindd_state_offline()) {
		DEBUG(10,("set_domain_online: domain %s remaining globally offline\n",
			domain->name ));
		return;
	}

	winbindd_set_locator_kdc_envs(domain);

	/* If we are waiting to get a krb5 ticket, trigger immediately. */
	GetTimeOfDay(&now);
	set_event_dispatch_time(winbind_event_context(),
				"krb5_ticket_gain_handler", now);

	/* Ok, we're out of any startup mode now... */
	domain->startup = False;

	if (domain->online == False) {
		/* We were offline - now we're online. We default to
		   using the MS-RPC backend if we started offline,
		   and if we're going online for the first time we
		   should really re-initialize the backends and the
		   checks to see if we're talking to an AD or NT domain.
		*/

		domain->initialized = False;

		/* 'reconnect_methods' is the MS-RPC backend. */
		if (domain->backend == &reconnect_methods) {
			domain->backend = NULL;
		}
	}

	/* Ensure we have no online timeout checks. */
	domain->check_online_timeout = 0;
	TALLOC_FREE(domain->check_online_event);

	/* Ensure we ignore any pending child messages. */
	messaging_deregister(winbind_messaging_context(),
			     MSG_WINBIND_TRY_TO_GO_ONLINE, NULL);
	messaging_deregister(winbind_messaging_context(),
			     MSG_WINBIND_FAILED_TO_GO_ONLINE, NULL);

	domain->online = True;

	/* Send an online message to the idmap child when our
	   primary domain comes online */

	if ( domain->primary ) {
		struct winbindd_child *idmap = idmap_child();

		if ( idmap->pid != 0 ) {
			messaging_send_buf(winbind_messaging_context(),
					   pid_to_procid(idmap->pid), 
					   MSG_WINBIND_ONLINE, 
					   (uint8 *)domain->name, 
					   strlen(domain->name)+1);
		}			
	}

	return;	
}

/****************************************************************
 Requested to set a domain online.
****************************************************************/

void set_domain_online_request(struct winbindd_domain *domain)
{
	struct timeval tev;

	DEBUG(10,("set_domain_online_request: called for domain %s\n",
		domain->name ));

	if (get_global_winbindd_state_offline()) {
		DEBUG(10,("set_domain_online_request: domain %s remaining globally offline\n",
			domain->name ));
		return;
	}

	/* We've been told it's safe to go online and
	   try and connect to a DC. But I don't believe it
	   because network manager seems to lie.
	   Wait at least 5 seconds. Heuristics suck... */

	if (!domain->check_online_event) {
		/* If we've come from being globally offline we
		   don't have a check online event handler set.
		   We need to add one now we're trying to go
		   back online. */

		DEBUG(10,("set_domain_online_request: domain %s was globally offline.\n",
			domain->name ));

		domain->check_online_event = event_add_timed(winbind_event_context(),
								NULL,
								timeval_current_ofs(5, 0),
								"check_domain_online_handler",
								check_domain_online_handler,
								domain);

		/* The above *has* to succeed for winbindd to work. */
		if (!domain->check_online_event) {
			smb_panic("set_domain_online_request: failed to add online handler");
		}
	}

	GetTimeOfDay(&tev);

	/* Go into "startup" mode again. */
	domain->startup_time = tev.tv_sec;
	domain->startup = True;

	tev.tv_sec += 5;

	set_event_dispatch_time(winbind_event_context(), "check_domain_online_handler", tev);
}

/****************************************************************
 Add -ve connection cache entries for domain and realm.
****************************************************************/

void winbind_add_failed_connection_entry(const struct winbindd_domain *domain,
					const char *server,
					NTSTATUS result)
{
	add_failed_connection_entry(domain->name, server, result);
	/* If this was the saf name for the last thing we talked to,
	   remove it. */
	saf_delete(domain->name);
	if (*domain->alt_name) {
		add_failed_connection_entry(domain->alt_name, server, result);
		saf_delete(domain->alt_name);
	}
	winbindd_unset_locator_kdc_env(domain);
}

/* Choose between anonymous or authenticated connections.  We need to use
   an authenticated connection if DCs have the RestrictAnonymous registry
   entry set > 0, or the "Additional restrictions for anonymous
   connections" set in the win2k Local Security Policy. 

   Caller to free() result in domain, username, password
*/

static void cm_get_ipc_userpass(char **username, char **domain, char **password)
{
	*username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
	*domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
	*password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);

	if (*username && **username) {

		if (!*domain || !**domain)
			*domain = smb_xstrdup(lp_workgroup());

		if (!*password || !**password)
			*password = smb_xstrdup("");

		DEBUG(3, ("cm_get_ipc_userpass: Retrieved auth-user from secrets.tdb [%s\\%s]\n", 
			  *domain, *username));

	} else {
		DEBUG(3, ("cm_get_ipc_userpass: No auth-user defined\n"));
		*username = smb_xstrdup("");
		*domain = smb_xstrdup("");
		*password = smb_xstrdup("");
	}
}

static bool get_dc_name_via_netlogon(struct winbindd_domain *domain,
				     fstring dcname,
				     struct sockaddr_storage *dc_ss)
{
	struct winbindd_domain *our_domain = NULL;
	struct rpc_pipe_client *netlogon_pipe = NULL;
	NTSTATUS result;
	WERROR werr;
	TALLOC_CTX *mem_ctx;
	unsigned int orig_timeout;
	const char *tmp = NULL;
	const char *p;

	/* Hmmmm. We can only open one connection to the NETLOGON pipe at the
	 * moment.... */

	if (IS_DC) {
		return False;
	}

	if (domain->primary) {
		return False;
	}

	our_domain = find_our_domain();

	if ((mem_ctx = talloc_init("get_dc_name_via_netlogon")) == NULL) {
		return False;
	}

	result = cm_connect_netlogon(our_domain, &netlogon_pipe);
	if (!NT_STATUS_IS_OK(result)) {
		talloc_destroy(mem_ctx);
		return False;
	}

	/* This call can take a long time - allow the server to time out.
	   35 seconds should do it. */

	orig_timeout = rpccli_set_timeout(netlogon_pipe, 35000);

	if (our_domain->active_directory) {
		struct netr_DsRGetDCNameInfo *domain_info = NULL;

		result = rpccli_netr_DsRGetDCName(netlogon_pipe,
						  mem_ctx,
						  our_domain->dcname,
						  domain->name,
						  NULL,
						  NULL,
						  DS_RETURN_DNS_NAME,
						  &domain_info,
						  &werr);
		if (W_ERROR_IS_OK(werr)) {
			tmp = talloc_strdup(
				mem_ctx, domain_info->dc_unc);
			if (tmp == NULL) {
				DEBUG(0, ("talloc_strdup failed\n"));
				talloc_destroy(mem_ctx);
				return false;
			}
			if (strlen(domain->alt_name) == 0) {
				fstrcpy(domain->alt_name,
					domain_info->domain_name);
			}
			if (strlen(domain->forest_name) == 0) {
				fstrcpy(domain->forest_name,
					domain_info->forest_name);
			}
		}
	} else {
		result = rpccli_netr_GetAnyDCName(netlogon_pipe, mem_ctx,
						  our_domain->dcname,
						  domain->name,
						  &tmp,
						  &werr);
	}

	/* And restore our original timeout. */
	rpccli_set_timeout(netlogon_pipe, orig_timeout);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(10,("rpccli_netr_GetAnyDCName failed: %s\n",
			nt_errstr(result)));
		talloc_destroy(mem_ctx);
		return false;
	}

	if (!W_ERROR_IS_OK(werr)) {
		DEBUG(10,("rpccli_netr_GetAnyDCName failed: %s\n",
			   dos_errstr(werr)));
		talloc_destroy(mem_ctx);
		return false;
	}

	/* rpccli_netr_GetAnyDCName gives us a name with \\ */
	p = strip_hostname(tmp);

	fstrcpy(dcname, p);

	talloc_destroy(mem_ctx);

	DEBUG(10,("rpccli_netr_GetAnyDCName returned %s\n", dcname));

	if (!resolve_name(dcname, dc_ss, 0x20)) {
		return False;
	}

	return True;
}

/**
 * Helper function to assemble trust password and account name
 */
static NTSTATUS get_trust_creds(const struct winbindd_domain *domain,
				char **machine_password,
				char **machine_account,
				char **machine_krb5_principal)
{
	const char *account_name;
	const char *name = NULL;

	/* If we are a DC and this is not our own domain */

	if (IS_DC) {
		name = domain->name;
	} else {
		struct winbindd_domain *our_domain = find_our_domain();

		if (!our_domain)
			return NT_STATUS_INVALID_SERVER_STATE;		

		name = our_domain->name;		
	}	

	if (!get_trust_pw_clear(name, machine_password,
				&account_name, NULL))
	{
		return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
	}

	if ((machine_account != NULL) &&
	    (asprintf(machine_account, "%s$", account_name) == -1))
	{
		return NT_STATUS_NO_MEMORY;
	}

	/* For now assume our machine account only exists in our domain */

	if (machine_krb5_principal != NULL)
	{
		struct winbindd_domain *our_domain = find_our_domain();

		if (!our_domain) {
			return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;			
		}

		if (asprintf(machine_krb5_principal, "%s$@%s",
			     account_name, our_domain->alt_name) == -1)
		{
			return NT_STATUS_NO_MEMORY;
		}

		strupper_m(*machine_krb5_principal);
	}

	return NT_STATUS_OK;
}

/************************************************************************
 Given a fd with a just-connected TCP connection to a DC, open a connection
 to the pipe.
************************************************************************/

static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
				      const int sockfd,
				      const char *controller,
				      struct cli_state **cli,
				      bool *retry)
{
	char *machine_password = NULL;
	char *machine_krb5_principal = NULL;
	char *machine_account = NULL;
	char *ipc_username = NULL;
	char *ipc_domain = NULL;
	char *ipc_password = NULL;

	struct named_mutex *mutex;

	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;

	struct sockaddr peeraddr;
	socklen_t peeraddr_len;

	struct sockaddr_in *peeraddr_in = (struct sockaddr_in *)&peeraddr;

	DEBUG(10,("cm_prepare_connection: connecting to DC %s for domain %s\n",
		controller, domain->name ));

	*retry = True;

	mutex = grab_named_mutex(talloc_tos(), controller,
				 WINBIND_SERVER_MUTEX_WAIT_TIME);
	if (mutex == NULL) {
		DEBUG(0,("cm_prepare_connection: mutex grab failed for %s\n",
			 controller));
		result = NT_STATUS_POSSIBLE_DEADLOCK;
		goto done;
	}

	if ((*cli = cli_initialise()) == NULL) {
		DEBUG(1, ("Could not cli_initialize\n"));
		result = NT_STATUS_NO_MEMORY;
		goto done;
	}

	(*cli)->timeout = 10000; 	/* 10 seconds */
	(*cli)->fd = sockfd;
	fstrcpy((*cli)->desthost, controller);
	(*cli)->use_kerberos = True;

	peeraddr_len = sizeof(peeraddr);

	if ((getpeername((*cli)->fd, &peeraddr, &peeraddr_len) != 0) ||
	    (peeraddr_len != sizeof(struct sockaddr_in)) ||
	    (peeraddr_in->sin_family != PF_INET))
	{
		DEBUG(0,("cm_prepare_connection: %s\n", strerror(errno)));
		result = NT_STATUS_UNSUCCESSFUL;
		goto done;
	}

	if (ntohs(peeraddr_in->sin_port) == 139) {
		struct nmb_name calling;
		struct nmb_name called;

		make_nmb_name(&calling, global_myname(), 0x0);
		make_nmb_name(&called, "*SMBSERVER", 0x20);

		if (!cli_session_request(*cli, &calling, &called)) {
			DEBUG(8, ("cli_session_request failed for %s\n",
				  controller));
			result = NT_STATUS_UNSUCCESSFUL;
			goto done;
		}
	}

	cli_setup_signing_state(*cli, Undefined);

	if (!cli_negprot(*cli)) {
		DEBUG(1, ("cli_negprot failed\n"));
		result = NT_STATUS_UNSUCCESSFUL;
		goto done;
	}

	if (!is_dc_trusted_domain_situation(domain->name) &&
	    (*cli)->protocol >= PROTOCOL_NT1 &&
	    (*cli)->capabilities & CAP_EXTENDED_SECURITY)
	{
		ADS_STATUS ads_status;

		result = get_trust_creds(domain, &machine_password,
					 &machine_account,
					 &machine_krb5_principal);
		if (!NT_STATUS_IS_OK(result)) {
			goto anon_fallback;
		}

		if (lp_security() == SEC_ADS) {

			/* Try a krb5 session */

			(*cli)->use_kerberos = True;
			DEBUG(5, ("connecting to %s from %s with kerberos principal "
				  "[%s] and realm [%s]\n", controller, global_myname(),
				  machine_krb5_principal, domain->alt_name));

			winbindd_set_locator_kdc_envs(domain);

			ads_status = cli_session_setup_spnego(*cli,
							      machine_krb5_principal, 
							      machine_password,
							      lp_workgroup(),
							      domain->name);

			if (!ADS_ERR_OK(ads_status)) {
				DEBUG(4,("failed kerberos session setup with %s\n",
					 ads_errstr(ads_status)));
			}

			result = ads_ntstatus(ads_status);
			if (NT_STATUS_IS_OK(result)) {
				/* Ensure creds are stored for NTLMSSP authenticated pipe access. */
				cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
				goto session_setup_done;
			}
		}

		/* Fall back to non-kerberos session setup using NTLMSSP SPNEGO with the machine account. */
		(*cli)->use_kerberos = False;

		DEBUG(5, ("connecting to %s from %s with username "
			  "[%s]\\[%s]\n",  controller, global_myname(),
			  lp_workgroup(), machine_account));

		ads_status = cli_session_setup_spnego(*cli,
						      machine_account, 
						      machine_password, 
						      lp_workgroup(),
						      NULL);
		if (!ADS_ERR_OK(ads_status)) {
			DEBUG(4, ("authenticated session setup failed with %s\n",
				ads_errstr(ads_status)));
		}

		result = ads_ntstatus(ads_status);
		if (NT_STATUS_IS_OK(result)) {
			/* Ensure creds are stored for NTLMSSP authenticated pipe access. */
			cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
			goto session_setup_done;
		}
	}

	/* Fall back to non-kerberos session setup with auth_user */

	(*cli)->use_kerberos = False;

	cm_get_ipc_userpass(&ipc_username, &ipc_domain, &ipc_password);

	if ((((*cli)->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) != 0) &&
	    (strlen(ipc_username) > 0)) {

		/* Only try authenticated if we have a username */

		DEBUG(5, ("connecting to %s from %s with username "
			  "[%s]\\[%s]\n",  controller, global_myname(),
			  ipc_domain, ipc_username));

		if (NT_STATUS_IS_OK(cli_session_setup(
					    *cli, ipc_username,
					    ipc_password, strlen(ipc_password)+1,
					    ipc_password, strlen(ipc_password)+1,
					    ipc_domain))) {
			/* Successful logon with given username. */
			cli_init_creds(*cli, ipc_username, ipc_domain, ipc_password);
			goto session_setup_done;
		} else {
			DEBUG(4, ("authenticated session setup with user %s\\%s failed.\n",
				ipc_domain, ipc_username ));
		}
	}

 anon_fallback:

	/* Fall back to anonymous connection, this might fail later */
	DEBUG(10,("cm_prepare_connection: falling back to anonymous "
		"connection for DC %s\n",
		controller ));

	if (NT_STATUS_IS_OK(cli_session_setup(*cli, "", NULL, 0,
					      NULL, 0, ""))) {
		DEBUG(5, ("Connected anonymously\n"));
		cli_init_creds(*cli, "", "", "");
		goto session_setup_done;
	}

	result = cli_nt_error(*cli);

	if (NT_STATUS_IS_OK(result))
		result = NT_STATUS_UNSUCCESSFUL;

	/* We can't session setup */

	goto done;

 session_setup_done:

	/* cache the server name for later connections */

	saf_store( domain->name, (*cli)->desthost );
	if (domain->alt_name && (*cli)->use_kerberos) {
		saf_store( domain->alt_name, (*cli)->desthost );
	}

	winbindd_set_locator_kdc_envs(domain);

	if (!cli_send_tconX(*cli, "IPC$", "IPC", "", 0)) {

		result = cli_nt_error(*cli);

		DEBUG(1,("failed tcon_X with %s\n", nt_errstr(result)));

		if (NT_STATUS_IS_OK(result))
			result = NT_STATUS_UNSUCCESSFUL;

		goto done;
	}

	TALLOC_FREE(mutex);
	*retry = False;

	/* set the domain if empty; needed for schannel connections */
	if ( !*(*cli)->domain ) {
		fstrcpy( (*cli)->domain, domain->name );
	}

	result = NT_STATUS_OK;

 done:
	TALLOC_FREE(mutex);
	SAFE_FREE(machine_account);
	SAFE_FREE(machine_password);
	SAFE_FREE(machine_krb5_principal);
	SAFE_FREE(ipc_username);
	SAFE_FREE(ipc_domain);
	SAFE_FREE(ipc_password);

	if (!NT_STATUS_IS_OK(result)) {
		winbind_add_failed_connection_entry(domain, controller, result);
		if ((*cli) != NULL) {
			cli_shutdown(*cli);
			*cli = NULL;
		}
	}

	return result;
}

/*******************************************************************
 Add a dcname and sockaddr_storage pair to the end of a dc_name_ip
 array.

 Keeps the list unique by not adding duplicate entries.

 @param[in] mem_ctx talloc memory context to allocate from
 @param[in] domain_name domain of the DC
 @param[in] dcname name of the DC to add to the list
 @param[in] pss Internet address and port pair to add to the list
 @param[in,out] dcs array of dc_name_ip structures to add to
 @param[in,out] num_dcs number of dcs returned in the dcs array
 @return true if the list was added to, false otherwise
*******************************************************************/

static bool add_one_dc_unique(TALLOC_CTX *mem_ctx, const char *domain_name,
			      const char *dcname, struct sockaddr_storage *pss,
			      struct dc_name_ip **dcs, int *num)
{
	int i = 0;

	if (!NT_STATUS_IS_OK(check_negative_conn_cache(domain_name, dcname))) {
		DEBUG(10, ("DC %s was in the negative conn cache\n", dcname));
		return False;
	}

	/* Make sure there's no duplicates in the list */
	for (i=0; i<*num; i++)
		if (addr_equal((struct sockaddr *)&(*dcs)[i].ss, (struct sockaddr *)pss))
			return False;

	*dcs = TALLOC_REALLOC_ARRAY(mem_ctx, *dcs, struct dc_name_ip, (*num)+1);

	if (*dcs == NULL)
		return False;

	fstrcpy((*dcs)[*num].name, dcname);
	(*dcs)[*num].ss = *pss;
	*num += 1;
	return True;
}

static bool add_sockaddr_to_array(TALLOC_CTX *mem_ctx,
				  struct sockaddr_storage *pss, uint16 port,
				  struct sockaddr_storage **addrs, int *num)
{
	*addrs = TALLOC_REALLOC_ARRAY(mem_ctx, *addrs, struct sockaddr_storage, (*num)+1);

	if (*addrs == NULL) {
		*num = 0;
		return False;
	}

	(*addrs)[*num] = *pss;
	set_sockaddr_port((struct sockaddr *)&(*addrs)[*num], port);

	*num += 1;
	return True;
}

/*******************************************************************
 convert an ip to a name
*******************************************************************/

static bool dcip_to_name(TALLOC_CTX *mem_ctx,
		const struct winbindd_domain *domain,
		struct sockaddr_storage *pss,
		fstring name )
{
	struct ip_service ip_list;
	uint32_t nt_version = NETLOGON_NT_VERSION_1;

	ip_list.ss = *pss;
	ip_list.port = 0;

#ifdef WITH_ADS
	/* For active directory servers, try to get the ldap server name.
	   None of these failures should be considered critical for now */

	if (lp_security() == SEC_ADS) {
		ADS_STRUCT *ads;
		ADS_STATUS ads_status;
		char addr[INET6_ADDRSTRLEN];

		print_sockaddr(addr, sizeof(addr), pss);

		ads = ads_init(domain->alt_name, domain->name, addr);
		ads->auth.flags |= ADS_AUTH_NO_BIND;

		ads_status = ads_connect(ads);
		if (ADS_ERR_OK(ads_status)) {
			/* We got a cldap packet. */
			fstrcpy(name, ads->config.ldap_server_name);
			namecache_store(name, 0x20, 1, &ip_list);

			DEBUG(10,("dcip_to_name: flags = 0x%x\n", (unsigned int)ads->config.flags));

			if (domain->primary && (ads->config.flags & NBT_SERVER_KDC)) {
				if (ads_closest_dc(ads)) {
					char *sitename = sitename_fetch(ads->config.realm);

					/* We're going to use this KDC for this realm/domain.
					   If we are using sites, then force the krb5 libs
					   to use this KDC. */

					create_local_private_krb5_conf_for_domain(domain->alt_name,
									domain->name,
									sitename,
									pss);

					SAFE_FREE(sitename);
				} else {
					/* use an off site KDC */
					create_local_private_krb5_conf_for_domain(domain->alt_name,
									domain->name,
									NULL,
									pss);
				}
				winbindd_set_locator_kdc_envs(domain);

				/* Ensure we contact this DC also. */
				saf_store( domain->name, name);
				saf_store( domain->alt_name, name);
			}

			ads_destroy( &ads );
			return True;
		}

		ads_destroy( &ads );
	}
#endif

	/* try GETDC requests next */

	if (send_getdc_request(mem_ctx, winbind_messaging_context(),
			       pss, domain->name, &domain->sid,
			       nt_version)) {
		const char *dc_name = NULL;
		int i;
		smb_msleep(100);
		for (i=0; i<5; i++) {
			if (receive_getdc_response(mem_ctx, pss, domain->name,
						   &nt_version,
						   &dc_name, NULL)) {
				fstrcpy(name, dc_name);
				namecache_store(name, 0x20, 1, &ip_list);
				return True;
			}
			smb_msleep(500);
		}
	}

	/* try node status request */

	if ( name_status_find(domain->name, 0x1c, 0x20, pss, name) ) {
		namecache_store(name, 0x20, 1, &ip_list);
		return True;
	}
	return False;
}

/*******************************************************************
 Retrieve a list of IP addresses for domain controllers.

 The array is sorted in the preferred connection order.

 @param[in] mem_ctx talloc memory context to allocate from
 @param[in] domain domain to retrieve DCs for
 @param[out] dcs array of dcs that will be returned
 @param[out] num_dcs number of dcs returned in the dcs array
 @return always true
*******************************************************************/

static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
		    struct dc_name_ip **dcs, int *num_dcs)
{
	fstring dcname;
	struct  sockaddr_storage ss;
	struct  ip_service *ip_list = NULL;
	int     iplist_size = 0;
	int     i;
	bool    is_our_domain;
	enum security_types sec = (enum security_types)lp_security();

	is_our_domain = strequal(domain->name, lp_workgroup());

	/* If not our domain, get the preferred DC, by asking our primary DC */
	if ( !is_our_domain
		&& get_dc_name_via_netlogon(domain, dcname, &ss)
		&& add_one_dc_unique(mem_ctx, domain->name, dcname, &ss, dcs,
		       num_dcs) )
	{
		char addr[INET6_ADDRSTRLEN];
		print_sockaddr(addr, sizeof(addr), &ss);
		DEBUG(10, ("Retrieved DC %s at %s via netlogon\n",
			   dcname, addr));
		return True;
	}

	if (sec == SEC_ADS) {
		char *sitename = NULL;

		/* We need to make sure we know the local site before
		   doing any DNS queries, as this will restrict the
		   get_sorted_dc_list() call below to only fetching
		   DNS records for the correct site. */

		/* Find any DC to get the site record.
		   We deliberately don't care about the
		   return here. */

		get_dc_name(domain->name, domain->alt_name, dcname, &ss);

		sitename = sitename_fetch(domain->alt_name);
		if (sitename) {

			/* Do the site-specific AD dns lookup first. */
			get_sorted_dc_list(domain->alt_name, sitename, &ip_list,
			       &iplist_size, True);

			/* Add ips to the DC array.  We don't look up the name
			   of the DC in this function, but we fill in the char*
			   of the ip now to make the failed connection cache
			   work */
			for ( i=0; i<iplist_size; i++ ) {
				char addr[INET6_ADDRSTRLEN];
				print_sockaddr(addr, sizeof(addr),
						&ip_list[i].ss);
				add_one_dc_unique(mem_ctx,
						domain->name,
						addr,
						&ip_list[i].ss,
						dcs,
						num_dcs);
			}

			SAFE_FREE(ip_list);
			SAFE_FREE(sitename);
			iplist_size = 0;
		}

		/* Now we add DCs from the main AD DNS lookup. */
		get_sorted_dc_list(domain->alt_name, NULL, &ip_list,
			&iplist_size, True);

		for ( i=0; i<iplist_size; i++ ) {
			char addr[INET6_ADDRSTRLEN];
			print_sockaddr(addr, sizeof(addr),
					&ip_list[i].ss);
			add_one_dc_unique(mem_ctx,
					domain->name,
					addr,
					&ip_list[i].ss,
					dcs,
					num_dcs);
		}

		SAFE_FREE(ip_list);
		iplist_size = 0;
        }

	/* Try standard netbios queries if no ADS */
	if (*num_dcs == 0) {
		get_sorted_dc_list(domain->name, NULL, &ip_list, &iplist_size,
		       False);

		for ( i=0; i<iplist_size; i++ ) {
			char addr[INET6_ADDRSTRLEN];
			print_sockaddr(addr, sizeof(addr),
					&ip_list[i].ss);
			add_one_dc_unique(mem_ctx,
					domain->name,
					addr,
					&ip_list[i].ss,
					dcs,
					num_dcs);
		}

		SAFE_FREE(ip_list);
		iplist_size = 0;
	}

	return True;
}

/*******************************************************************
 Find and make a connection to a DC in the given domain.

 @param[in] mem_ctx talloc memory context to allocate from
 @param[in] domain domain to find a dc in
 @param[out] dcname NetBIOS or FQDN of DC that's connected to
 @param[out] pss DC Internet address and port
 @param[out] fd fd of the open socket connected to the newly found dc
 @return true when a DC connection is made, false otherwise
*******************************************************************/

static bool find_new_dc(TALLOC_CTX *mem_ctx,
			struct winbindd_domain *domain,
			fstring dcname, struct sockaddr_storage *pss, int *fd)
{
	struct dc_name_ip *dcs = NULL;
	int num_dcs = 0;

	const char **dcnames = NULL;
	int num_dcnames = 0;

	struct sockaddr_storage *addrs = NULL;
	int num_addrs = 0;

	int i, fd_index;

	*fd = -1;

 again:
	if (!get_dcs(mem_ctx, domain, &dcs, &num_dcs) || (num_dcs == 0))
		return False;

	for (i=0; i<num_dcs; i++) {

		if (!add_string_to_array(mem_ctx, dcs[i].name,
				    &dcnames, &num_dcnames)) {
			return False;
		}
		if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, 445,
				      &addrs, &num_addrs)) {
			return False;
		}

		if (!add_string_to_array(mem_ctx, dcs[i].name,
				    &dcnames, &num_dcnames)) {
			return False;
		}
		if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, 139,
				      &addrs, &num_addrs)) {
			return False;
		}
	}

	if ((num_dcnames == 0) || (num_dcnames != num_addrs))
		return False;

	if ((addrs == NULL) || (dcnames == NULL))
		return False;

	/* 5 second timeout. */
	if (!open_any_socket_out(addrs, num_addrs, 5000, &fd_index, fd) ) {
		for (i=0; i<num_dcs; i++) {
			char ab[INET6_ADDRSTRLEN];
			print_sockaddr(ab, sizeof(ab), &dcs[i].ss);
			DEBUG(10, ("find_new_dc: open_any_socket_out failed for "
				"domain %s address %s. Error was %s\n",
				domain->name, ab, strerror(errno) ));
			winbind_add_failed_connection_entry(domain,
				dcs[i].name, NT_STATUS_UNSUCCESSFUL);
		}
		return False;
	}

	*pss = addrs[fd_index];

	if (*dcnames[fd_index] != '\0' && !is_ipaddress(dcnames[fd_index])) {
		/* Ok, we've got a name for the DC */
		fstrcpy(dcname, dcnames[fd_index]);
		return True;
	}

	/* Try to figure out the name */
	if (dcip_to_name(mem_ctx, domain, pss, dcname)) {
		return True;
	}

	/* We can not continue without the DC's name */
	winbind_add_failed_connection_entry(domain, dcs[fd_index].name,
				    NT_STATUS_UNSUCCESSFUL);

	/* Throw away all arrays as we're doing this again. */
	TALLOC_FREE(dcs);
	num_dcs = 0;

	TALLOC_FREE(dcnames);
	num_dcnames = 0;

	TALLOC_FREE(addrs);
	num_addrs = 0;

	close(*fd);
	*fd = -1;

	goto again;
}

static NTSTATUS cm_open_connection(struct winbindd_domain *domain,
				   struct winbindd_cm_conn *new_conn)
{
	TALLOC_CTX *mem_ctx;
	NTSTATUS result;
	char *saf_servername = saf_fetch( domain->name );
	int retries;

	if ((mem_ctx = talloc_init("cm_open_connection")) == NULL) {
		SAFE_FREE(saf_servername);
		set_domain_offline(domain);
		return NT_STATUS_NO_MEMORY;
	}

	/* we have to check the server affinity cache here since 
	   later we selecte a DC based on response time and not preference */

	/* Check the negative connection cache
	   before talking to it. It going down may have
	   triggered the reconnection. */

	if ( saf_servername && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, saf_servername))) {

		DEBUG(10,("cm_open_connection: saf_servername is '%s' for domain %s\n",
			saf_servername, domain->name ));

		/* convert an ip address to a name */
		if (is_ipaddress( saf_servername ) ) {
			fstring saf_name;
			struct sockaddr_storage ss;

			if (!interpret_string_addr(&ss, saf_servername,
						AI_NUMERICHOST)) {
				return NT_STATUS_UNSUCCESSFUL;
			}
			if (dcip_to_name(mem_ctx, domain, &ss, saf_name )) {
				fstrcpy( domain->dcname, saf_name );
			} else {
				winbind_add_failed_connection_entry(
					domain, saf_servername,
					NT_STATUS_UNSUCCESSFUL);
			}
		} else {
			fstrcpy( domain->dcname, saf_servername );
		}

		SAFE_FREE( saf_servername );
	}

	for (retries = 0; retries < 3; retries++) {
		int fd = -1;
		bool retry = False;

		result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;

		DEBUG(10,("cm_open_connection: dcname is '%s' for domain %s\n",
			domain->dcname, domain->name ));

		if (*domain->dcname 
			&& NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, domain->dcname))
			&& (resolve_name(domain->dcname, &domain->dcaddr, 0x20)))
		{
			struct sockaddr_storage *addrs = NULL;
			int num_addrs = 0;
			int dummy = 0;

			if (!add_sockaddr_to_array(mem_ctx, &domain->dcaddr, 445, &addrs, &num_addrs)) {
				set_domain_offline(domain);
				talloc_destroy(mem_ctx);
				return NT_STATUS_NO_MEMORY;
			}
			if (!add_sockaddr_to_array(mem_ctx, &domain->dcaddr, 139, &addrs, &num_addrs)) {
				set_domain_offline(domain);
				talloc_destroy(mem_ctx);
				return NT_STATUS_NO_MEMORY;
			}

			/* 5 second timeout. */
			if (!open_any_socket_out(addrs, num_addrs, 5000, &dummy, &fd)) {
				fd = -1;
			}
		}

		if ((fd == -1) 
			&& !find_new_dc(mem_ctx, domain, domain->dcname, &domain->dcaddr, &fd))
		{
			/* This is the one place where we will
			   set the global winbindd offline state
			   to true, if a "WINBINDD_OFFLINE" entry
			   is found in the winbindd cache. */
			set_global_winbindd_state_offline();
			break;
		}

		new_conn->cli = NULL;

		result = cm_prepare_connection(domain, fd, domain->dcname,
			&new_conn->cli, &retry);

		if (!retry)
			break;
	}

	if (NT_STATUS_IS_OK(result)) {

		winbindd_set_locator_kdc_envs(domain);

		if (domain->online == False) {
			/* We're changing state from offline to online. */
			set_global_winbindd_state_online();
		}
		set_domain_online(domain);
	} else {
		/* Ensure we setup the retry handler. */
		set_domain_offline(domain);
	}

	talloc_destroy(mem_ctx);
	return result;
}

/* Close down all open pipes on a connection. */

void invalidate_cm_connection(struct winbindd_cm_conn *conn)
{
	/* We're closing down a possibly dead
	   connection. Don't have impossibly long (10s) timeouts. */

	if (conn->cli) {
		cli_set_timeout(conn->cli, 1000); /* 1 second. */
	}

	if (conn->samr_pipe != NULL) {
		TALLOC_FREE(conn->samr_pipe);
		/* Ok, it must be dead. Drop timeout to 0.5 sec. */
		if (conn->cli) {
			cli_set_timeout(conn->cli, 500);
		}
	}

	if (conn->lsa_pipe != NULL) {
		TALLOC_FREE(conn->lsa_pipe);
		/* Ok, it must be dead. Drop timeout to 0.5 sec. */
		if (conn->cli) {
			cli_set_timeout(conn->cli, 500);
		}
	}

	if (conn->netlogon_pipe != NULL) {
		TALLOC_FREE(conn->netlogon_pipe);
		/* Ok, it must be dead. Drop timeout to 0.5 sec. */
		if (conn->cli) {
			cli_set_timeout(conn->cli, 500);
		}
	}

	if (conn->cli) {
		cli_shutdown(conn->cli);
	}

	conn->cli = NULL;
}

void close_conns_after_fork(void)
{
	struct winbindd_domain *domain;

	for (domain = domain_list(); domain; domain = domain->next) {
		if (domain->conn.cli == NULL)
			continue;

		if (domain->conn.cli->fd == -1)
			continue;

		close(domain->conn.cli->fd);
		domain->conn.cli->fd = -1;
	}
}

static bool connection_ok(struct winbindd_domain *domain)
{
	if (domain->conn.cli == NULL) {
		DEBUG(8, ("connection_ok: Connection to %s for domain %s has NULL "
			  "cli!\n", domain->dcname, domain->name));
		return False;
	}

	if (!domain->conn.cli->initialised) {
		DEBUG(3, ("connection_ok: Connection to %s for domain %s was never "
			  "initialised!\n", domain->dcname, domain->name));
		return False;
	}

	if (domain->conn.cli->fd == -1) {
		DEBUG(3, ("connection_ok: Connection to %s for domain %s has died or was "
			  "never started (fd == -1)\n", 
			  domain->dcname, domain->name));
		return False;
	}

	if (domain->online == False) {
		DEBUG(3, ("connection_ok: Domain %s is offline\n", domain->name));
		return False;
	}

	return True;
}

/* Initialize a new connection up to the RPC BIND.
   Bypass online status check so always does network calls. */

static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain)
{
	NTSTATUS result;

	/* Internal connections never use the network. */
	if (domain->internal) {
		domain->initialized = True;
		return NT_STATUS_OK;
	}

	if (connection_ok(domain)) {
		if (!domain->initialized) {
			set_dc_type_and_flags(domain);
		}
		return NT_STATUS_OK;
	}

	invalidate_cm_connection(&domain->conn);

	result = cm_open_connection(domain, &domain->conn);

	if (NT_STATUS_IS_OK(result) && !domain->initialized) {
		set_dc_type_and_flags(domain);
	}

	return result;
}

NTSTATUS init_dc_connection(struct winbindd_domain *domain)
{
	if (domain->initialized && !domain->online) {
		/* We check for online status elsewhere. */
		return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
	}

	return init_dc_connection_network(domain);
}

/******************************************************************************
 Set the trust flags (direction and forest location) for a domain
******************************************************************************/

static bool set_dc_type_and_flags_trustinfo( struct winbindd_domain *domain )
{
	struct winbindd_domain *our_domain;
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	struct netr_DomainTrustList trusts;
	int i;
	uint32 flags = (NETR_TRUST_FLAG_IN_FOREST |
			NETR_TRUST_FLAG_OUTBOUND |
			NETR_TRUST_FLAG_INBOUND);
	struct rpc_pipe_client *cli;
	TALLOC_CTX *mem_ctx = NULL;

	DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s\n", domain->name ));

	/* Our primary domain doesn't need to worry about trust flags.
	   Force it to go through the network setup */
	if ( domain->primary ) {		
		return False;		
	}

	our_domain = find_our_domain();

	if ( !connection_ok(our_domain) ) {
		DEBUG(3,("set_dc_type_and_flags_trustinfo: No connection to our domain!\n"));		
		return False;
	}

	/* This won't work unless our domain is AD */

	if ( !our_domain->active_directory ) {
		return False;
	}

	/* Use DsEnumerateDomainTrusts to get us the trust direction
	   and type */

	result = cm_connect_netlogon(our_domain, &cli);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(5, ("set_dc_type_and_flags_trustinfo: Could not open "
			  "a connection to %s for PIPE_NETLOGON (%s)\n", 
			  domain->name, nt_errstr(result)));
		return False;
	}

	if ( (mem_ctx = talloc_init("set_dc_type_and_flags_trustinfo")) == NULL ) {
		DEBUG(0,("set_dc_type_and_flags_trustinfo: talloc_init() failed!\n"));
		return False;
	}	

	result = rpccli_netr_DsrEnumerateDomainTrusts(cli, mem_ctx,
						      cli->desthost,
						      flags,
						      &trusts,
						      NULL);
	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(0,("set_dc_type_and_flags_trustinfo: "
			"failed to query trusted domain list: %s\n",
			nt_errstr(result)));
		talloc_destroy(mem_ctx);
		return false;
	}

	/* Now find the domain name and get the flags */

	for ( i=0; i<trusts.count; i++ ) {
		if ( strequal( domain->name, trusts.array[i].netbios_name) ) {
			domain->domain_flags          = trusts.array[i].trust_flags;
			domain->domain_type           = trusts.array[i].trust_type;
			domain->domain_trust_attribs  = trusts.array[i].trust_attributes;

			if ( domain->domain_type == NETR_TRUST_TYPE_UPLEVEL )
				domain->active_directory = True;

			/* This flag is only set if the domain is *our* 
			   primary domain and the primary domain is in
			   native mode */

			domain->native_mode = (domain->domain_flags & NETR_TRUST_FLAG_NATIVE);

			DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s is %sin "
				  "native mode.\n", domain->name, 
				  domain->native_mode ? "" : "NOT "));

			DEBUG(5,("set_dc_type_and_flags_trustinfo: domain %s is %s"
				 "running active directory.\n", domain->name, 
				 domain->active_directory ? "" : "NOT "));


			domain->initialized = True;

			if ( !winbindd_can_contact_domain( domain) )
				domain->internal = True;

			break;
		}		
	}

	talloc_destroy( mem_ctx );

	return domain->initialized;	
}

/******************************************************************************
 We can 'sense' certain things about the DC by it's replies to certain
 questions.

 This tells us if this particular remote server is Active Directory, and if it
 is native mode.
******************************************************************************/

static void set_dc_type_and_flags_connect( struct winbindd_domain *domain )
{
	NTSTATUS 		result;
	WERROR werr;
	TALLOC_CTX              *mem_ctx = NULL;
	struct rpc_pipe_client  *cli;
	POLICY_HND pol;
	union dssetup_DsRoleInfo info;
	union lsa_PolicyInformation *lsa_info = NULL;

	if (!connection_ok(domain)) {
		return;
	}

	mem_ctx = talloc_init("set_dc_type_and_flags on domain %s\n",
			      domain->name);
	if (!mem_ctx) {
		DEBUG(1, ("set_dc_type_and_flags_connect: talloc_init() failed\n"));
		return;
	}

	DEBUG(5, ("set_dc_type_and_flags_connect: domain %s\n", domain->name ));

	result = cli_rpc_pipe_open_noauth(domain->conn.cli,
					  &ndr_table_dssetup.syntax_id,
					  &cli);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
			  "PI_DSSETUP on domain %s: (%s)\n",
			  domain->name, nt_errstr(result)));

		/* if this is just a non-AD domain we need to continue
		 * identifying so that we can in the end return with
		 * domain->initialized = True - gd */

		goto no_dssetup;
	}

	result = rpccli_dssetup_DsRoleGetPrimaryDomainInformation(cli, mem_ctx,
								  DS_ROLE_BASIC_INFORMATION,
								  &info,
								  &werr);
	TALLOC_FREE(cli);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(5, ("set_dc_type_and_flags_connect: rpccli_ds_getprimarydominfo "
			  "on domain %s failed: (%s)\n",
			  domain->name, nt_errstr(result)));

		/* older samba3 DCs will return DCERPC_FAULT_OP_RNG_ERROR for
		 * every opcode on the DSSETUP pipe, continue with
		 * no_dssetup mode here as well to get domain->initialized
		 * set - gd */

		if (NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR) {
			goto no_dssetup;
		}

		TALLOC_FREE(mem_ctx);
		return;
	}

	if ((info.basic.flags & DS_ROLE_PRIMARY_DS_RUNNING) &&
	    !(info.basic.flags & DS_ROLE_PRIMARY_DS_MIXED_MODE)) {
		domain->native_mode = True;
	} else {
		domain->native_mode = False;
	}

no_dssetup:
	result = cli_rpc_pipe_open_noauth(domain->conn.cli,
					  &ndr_table_lsarpc.syntax_id, &cli);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
			  "PI_LSARPC on domain %s: (%s)\n",
			  domain->name, nt_errstr(result)));
		TALLOC_FREE(cli);
		TALLOC_FREE(mem_ctx);
		return;
	}

	result = rpccli_lsa_open_policy2(cli, mem_ctx, True, 
					 SEC_RIGHTS_MAXIMUM_ALLOWED, &pol);

	if (NT_STATUS_IS_OK(result)) {
		/* This particular query is exactly what Win2k clients use 
		   to determine that the DC is active directory */
		result = rpccli_lsa_QueryInfoPolicy2(cli, mem_ctx,
						     &pol,
						     LSA_POLICY_INFO_DNS,
						     &lsa_info);
	}

	if (NT_STATUS_IS_OK(result)) {
		domain->active_directory = True;

		if (lsa_info->dns.name.string) {
			fstrcpy(domain->name, lsa_info->dns.name.string);
		}

		if (lsa_info->dns.dns_domain.string) {
			fstrcpy(domain->alt_name,
				lsa_info->dns.dns_domain.string);
		}

		/* See if we can set some domain trust flags about
		   ourself */

		if (lsa_info->dns.dns_forest.string) {
			fstrcpy(domain->forest_name,
				lsa_info->dns.dns_forest.string);

			if (strequal(domain->forest_name, domain->alt_name)) {
				domain->domain_flags |= NETR_TRUST_FLAG_TREEROOT;
			}
		}

		if (lsa_info->dns.sid) {
			sid_copy(&domain->sid, lsa_info->dns.sid);
		}
	} else {
		domain->active_directory = False;

		result = rpccli_lsa_open_policy(cli, mem_ctx, True, 
						SEC_RIGHTS_MAXIMUM_ALLOWED,
						&pol);

		if (!NT_STATUS_IS_OK(result)) {
			goto done;
		}

		result = rpccli_lsa_QueryInfoPolicy(cli, mem_ctx,
						    &pol,
						    LSA_POLICY_INFO_ACCOUNT_DOMAIN,
						    &lsa_info);

		if (NT_STATUS_IS_OK(result)) {

			if (lsa_info->account_domain.name.string) {
				fstrcpy(domain->name,
					lsa_info->account_domain.name.string);
			}

			if (lsa_info->account_domain.sid) {
				sid_copy(&domain->sid, lsa_info->account_domain.sid);
			}
		}
	}
done:

	DEBUG(5, ("set_dc_type_and_flags_connect: domain %s is %sin native mode.\n",
		  domain->name, domain->native_mode ? "" : "NOT "));

	DEBUG(5,("set_dc_type_and_flags_connect: domain %s is %srunning active directory.\n",
		  domain->name, domain->active_directory ? "" : "NOT "));

	TALLOC_FREE(cli);

	TALLOC_FREE(mem_ctx);

	domain->initialized = True;
}

/**********************************************************************
 Set the domain_flags (trust attributes, domain operating modes, etc... 
***********************************************************************/

static void set_dc_type_and_flags( struct winbindd_domain *domain )
{
	/* we always have to contact our primary domain */

	if ( domain->primary ) {
		DEBUG(10,("set_dc_type_and_flags: setting up flags for "
			  "primary domain\n"));
		set_dc_type_and_flags_connect( domain );
		return;		
	}

	/* Use our DC to get the information if possible */

	if ( !set_dc_type_and_flags_trustinfo( domain ) ) {
		/* Otherwise, fallback to contacting the 
		   domain directly */
		set_dc_type_and_flags_connect( domain );
	}

	return;
}



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

static bool cm_get_schannel_dcinfo(struct winbindd_domain *domain,
				   struct dcinfo **ppdc)
{
	NTSTATUS result;
	struct rpc_pipe_client *netlogon_pipe;

	if (lp_client_schannel() == False) {
		return False;
	}

	result = cm_connect_netlogon(domain, &netlogon_pipe);
	if (!NT_STATUS_IS_OK(result)) {
		return False;
	}

	/* Return a pointer to the struct dcinfo from the
	   netlogon pipe. */

	if (!domain->conn.netlogon_pipe->dc) {
		return false;
	}

	*ppdc = domain->conn.netlogon_pipe->dc;
	return True;
}

NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
			struct rpc_pipe_client **cli, POLICY_HND *sam_handle)
{
	struct winbindd_cm_conn *conn;
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	fstring conn_pwd;
	struct dcinfo *p_dcinfo;
	char *machine_password = NULL;
	char *machine_account = NULL;
	char *domain_name = NULL;

	result = init_dc_connection(domain);
	if (!NT_STATUS_IS_OK(result)) {
		return result;
	}

	conn = &domain->conn;

	if (conn->samr_pipe != NULL) {
		goto done;
	}


	/*
	 * No SAMR pipe yet. Attempt to get an NTLMSSP SPNEGO authenticated
	 * sign and sealed pipe using the machine account password by
	 * preference. If we can't - try schannel, if that fails, try
	 * anonymous.
	 */

	pwd_get_cleartext(&conn->cli->pwd, conn_pwd);
	if ((conn->cli->user_name[0] == '\0') ||
	    (conn->cli->domain[0] == '\0') || 
	    (conn_pwd[0] == '\0'))
	{
		result = get_trust_creds(domain, &machine_password,
					 &machine_account, NULL);
		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(10, ("cm_connect_sam: No no user available for "
				   "domain %s, trying schannel\n", conn->cli->domain));
			goto schannel;
		}
		domain_name = domain->name;
	} else {
		machine_password = SMB_STRDUP(conn_pwd);		
		machine_account = SMB_STRDUP(conn->cli->user_name);
		domain_name = conn->cli->domain;
	}

	if (!machine_password || !machine_account) {
		result = NT_STATUS_NO_MEMORY;
		goto done;
	}

	/* We have an authenticated connection. Use a NTLMSSP SPNEGO
	   authenticated SAMR pipe with sign & seal. */
	result = cli_rpc_pipe_open_spnego_ntlmssp(conn->cli,
						  &ndr_table_samr.syntax_id,
						  PIPE_AUTH_LEVEL_PRIVACY,
						  domain_name,
						  machine_account,
						  machine_password,
						  &conn->samr_pipe);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(10,("cm_connect_sam: failed to connect to SAMR "
			  "pipe for domain %s using NTLMSSP "
			  "authenticated pipe: user %s\\%s. Error was "
			  "%s\n", domain->name, domain_name,
			  machine_account, nt_errstr(result)));
		goto schannel;
	}

	DEBUG(10,("cm_connect_sam: connected to SAMR pipe for "
		  "domain %s using NTLMSSP authenticated "
		  "pipe: user %s\\%s\n", domain->name,
		  domain_name, machine_account));

	result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
				      conn->samr_pipe->desthost,
				      SEC_RIGHTS_MAXIMUM_ALLOWED,
				      &conn->sam_connect_handle);
	if (NT_STATUS_IS_OK(result)) {
		goto open_domain;
	}
	DEBUG(10,("cm_connect_sam: ntlmssp-sealed rpccli_samr_Connect2 "
		  "failed for domain %s, error was %s. Trying schannel\n",
		  domain->name, nt_errstr(result) ));
	TALLOC_FREE(conn->samr_pipe);

 schannel:

	/* Fall back to schannel if it's a W2K pre-SP1 box. */

	if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
		/* If this call fails - conn->cli can now be NULL ! */
		DEBUG(10, ("cm_connect_sam: Could not get schannel auth info "
			   "for domain %s, trying anon\n", domain->name));
		goto anonymous;
	}
	result = cli_rpc_pipe_open_schannel_with_key
		(conn->cli, &ndr_table_samr.syntax_id, PIPE_AUTH_LEVEL_PRIVACY,
		 domain->name, p_dcinfo, &conn->samr_pipe);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(10,("cm_connect_sam: failed to connect to SAMR pipe for "
			  "domain %s using schannel. Error was %s\n",
			  domain->name, nt_errstr(result) ));
		goto anonymous;
	}
	DEBUG(10,("cm_connect_sam: connected to SAMR pipe for domain %s using "
		  "schannel.\n", domain->name ));

	result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
				      conn->samr_pipe->desthost,
				      SEC_RIGHTS_MAXIMUM_ALLOWED,
				      &conn->sam_connect_handle);
	if (NT_STATUS_IS_OK(result)) {
		goto open_domain;
	}
	DEBUG(10,("cm_connect_sam: schannel-sealed rpccli_samr_Connect2 failed "
		  "for domain %s, error was %s. Trying anonymous\n",
		  domain->name, nt_errstr(result) ));
	TALLOC_FREE(conn->samr_pipe);

 anonymous:

	/* Finally fall back to anonymous. */
	result = cli_rpc_pipe_open_noauth(conn->cli, &ndr_table_samr.syntax_id,
					  &conn->samr_pipe);

	if (!NT_STATUS_IS_OK(result)) {
		goto done;
	}

	result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
				      conn->samr_pipe->desthost,
				      SEC_RIGHTS_MAXIMUM_ALLOWED,
				      &conn->sam_connect_handle);
	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(10,("cm_connect_sam: rpccli_samr_Connect2 failed "
			  "for domain %s Error was %s\n",
			  domain->name, nt_errstr(result) ));
		goto done;
	}

 open_domain:
	result = rpccli_samr_OpenDomain(conn->samr_pipe,
					mem_ctx,
					&conn->sam_connect_handle,
					SEC_RIGHTS_MAXIMUM_ALLOWED,
					&domain->sid,
					&conn->sam_domain_handle);

 done:

	if (!NT_STATUS_IS_OK(result)) {
		invalidate_cm_connection(conn);
		return result;
	}

	*cli = conn->samr_pipe;
	*sam_handle = conn->sam_domain_handle;
	SAFE_FREE(machine_password);
	SAFE_FREE(machine_account);
	return result;
}

NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
			struct rpc_pipe_client **cli, POLICY_HND *lsa_policy)
{
	struct winbindd_cm_conn *conn;
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	fstring conn_pwd;
	struct dcinfo *p_dcinfo;

	result = init_dc_connection(domain);
	if (!NT_STATUS_IS_OK(result))
		return result;

	conn = &domain->conn;

	if (conn->lsa_pipe != NULL) {
		goto done;
	}

	pwd_get_cleartext(&conn->cli->pwd, conn_pwd);
	if ((conn->cli->user_name[0] == '\0') ||
	    (conn->cli->domain[0] == '\0') || 
	    (conn_pwd[0] == '\0')) {
		DEBUG(10, ("cm_connect_lsa: No no user available for "
			   "domain %s, trying schannel\n", conn->cli->domain));
		goto schannel;
	}

	/* We have an authenticated connection. Use a NTLMSSP SPNEGO
	 * authenticated LSA pipe with sign & seal. */
	result = cli_rpc_pipe_open_spnego_ntlmssp
		(conn->cli, &ndr_table_lsarpc.syntax_id,
		 PIPE_AUTH_LEVEL_PRIVACY,
		 conn->cli->domain, conn->cli->user_name, conn_pwd,
		 &conn->lsa_pipe);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
			  "domain %s using NTLMSSP authenticated pipe: user "
			  "%s\\%s. Error was %s. Trying schannel.\n",
			  domain->name, conn->cli->domain,
			  conn->cli->user_name, nt_errstr(result)));
		goto schannel;
	}

	DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
		  "NTLMSSP authenticated pipe: user %s\\%s\n",
		  domain->name, conn->cli->domain, conn->cli->user_name ));

	result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
					SEC_RIGHTS_MAXIMUM_ALLOWED,
					&conn->lsa_policy);
	if (NT_STATUS_IS_OK(result)) {
		goto done;
	}

	DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
		  "schannel\n"));

	TALLOC_FREE(conn->lsa_pipe);

 schannel:

	/* Fall back to schannel if it's a W2K pre-SP1 box. */

	if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
		/* If this call fails - conn->cli can now be NULL ! */
		DEBUG(10, ("cm_connect_lsa: Could not get schannel auth info "
			   "for domain %s, trying anon\n", domain->name));
		goto anonymous;
	}
	result = cli_rpc_pipe_open_schannel_with_key
		(conn->cli, &ndr_table_lsarpc.syntax_id,
		 PIPE_AUTH_LEVEL_PRIVACY,
		 domain->name, p_dcinfo, &conn->lsa_pipe);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
			  "domain %s using schannel. Error was %s\n",
			  domain->name, nt_errstr(result) ));
		goto anonymous;
	}
	DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
		  "schannel.\n", domain->name ));

	result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
					SEC_RIGHTS_MAXIMUM_ALLOWED,
					&conn->lsa_policy);
	if (NT_STATUS_IS_OK(result)) {
		goto done;
	}

	DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
		  "anonymous\n"));

	TALLOC_FREE(conn->lsa_pipe);

 anonymous:

	result = cli_rpc_pipe_open_noauth(conn->cli,
					  &ndr_table_lsarpc.syntax_id,
					  &conn->lsa_pipe);
	if (!NT_STATUS_IS_OK(result)) {
		result = NT_STATUS_PIPE_NOT_AVAILABLE;
		goto done;
	}

	result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
					SEC_RIGHTS_MAXIMUM_ALLOWED,
					&conn->lsa_policy);
 done:
	if (!NT_STATUS_IS_OK(result)) {
		invalidate_cm_connection(conn);
		return result;
	}

	*cli = conn->lsa_pipe;
	*lsa_policy = conn->lsa_policy;
	return result;
}

/****************************************************************************
 Open the netlogon pipe to this DC. Use schannel if specified in client conf.
 session key stored in conn->netlogon_pipe->dc->sess_key.
****************************************************************************/

NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
			     struct rpc_pipe_client **cli)
{
	struct winbindd_cm_conn *conn;
	NTSTATUS result;

	uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
	uint8  mach_pwd[16];
	uint32  sec_chan_type;
	const char *account_name;
	struct rpc_pipe_client *netlogon_pipe = NULL;

	*cli = NULL;

	result = init_dc_connection(domain);
	if (!NT_STATUS_IS_OK(result)) {
		return result;
	}

	conn = &domain->conn;

	if (conn->netlogon_pipe != NULL) {
		*cli = conn->netlogon_pipe;
		return NT_STATUS_OK;
	}

	result = cli_rpc_pipe_open_noauth(conn->cli,
					  &ndr_table_netlogon.syntax_id,
					  &netlogon_pipe);
	if (!NT_STATUS_IS_OK(result)) {
		return result;
	}

	if ((!IS_DC) && (!domain->primary)) {
		/* Clear the schannel request bit and drop down */
		neg_flags &= ~NETLOGON_NEG_SCHANNEL;		
		goto no_schannel;
	}

	if (lp_client_schannel() != False) {
		neg_flags |= NETLOGON_NEG_SCHANNEL;
	}

	if (!get_trust_pw_hash(domain->name, mach_pwd, &account_name,
			       &sec_chan_type))
	{
		TALLOC_FREE(netlogon_pipe);
		return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
	}

	result = rpccli_netlogon_setup_creds(
		 netlogon_pipe,
		 domain->dcname, /* server name. */
		 domain->name,   /* domain name */
		 global_myname(), /* client name */
		 account_name,   /* machine account */
		 mach_pwd,       /* machine password */
		 sec_chan_type,  /* from get_trust_pw */
		 &neg_flags);

	if (!NT_STATUS_IS_OK(result)) {
		TALLOC_FREE(netlogon_pipe);
		return result;
	}

	if ((lp_client_schannel() == True) &&
			((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
		DEBUG(3, ("Server did not offer schannel\n"));
		TALLOC_FREE(netlogon_pipe);
		return NT_STATUS_ACCESS_DENIED;
	}

 no_schannel:
	if ((lp_client_schannel() == False) ||
			((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
		/*
		 * NetSamLogonEx only works for schannel
		 */
		domain->can_do_samlogon_ex = False;

		/* We're done - just keep the existing connection to NETLOGON
		 * open */
		conn->netlogon_pipe = netlogon_pipe;
		*cli = conn->netlogon_pipe;
		return NT_STATUS_OK;
	}

	/* Using the credentials from the first pipe, open a signed and sealed
	   second netlogon pipe. The session key is stored in the schannel
	   part of the new pipe auth struct.
	*/

	result = cli_rpc_pipe_open_schannel_with_key(
		conn->cli, &ndr_table_netlogon.syntax_id,
		PIPE_AUTH_LEVEL_PRIVACY, domain->name, netlogon_pipe->dc,
		&conn->netlogon_pipe);

	/* We can now close the initial netlogon pipe. */
	TALLOC_FREE(netlogon_pipe);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(3, ("Could not open schannel'ed NETLOGON pipe. Error "
			  "was %s\n", nt_errstr(result)));

		/* make sure we return something besides OK */
		return !NT_STATUS_IS_OK(result) ? result : NT_STATUS_PIPE_NOT_AVAILABLE;
	}

	/*
	 * Try NetSamLogonEx for AD domains
	 */
	domain->can_do_samlogon_ex = domain->active_directory;

	*cli = conn->netlogon_pipe;
	return NT_STATUS_OK;
}