summaryrefslogtreecommitdiff
path: root/source3/winbindd/idmap_adex/likewise_cell.c
blob: 0914132b9339a5e801477c706ed722ce8f4eb9be (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
/*
 * idmap_adex: Support for AD Forests
 *
 * Copyright (C) Gerald (Jerry) Carter 2006-2008
 *
 * 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 "ads.h"
#include "idmap.h"
#include "idmap_adex.h"
#include "secrets.h"
#include "../libcli/security/dom_sid.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP

static struct likewise_cell *_lw_cell_list = NULL;

/**********************************************************************
 Return the current HEAD of the list
 *********************************************************************/

 struct likewise_cell *cell_list_head(void)
{
	return _lw_cell_list;
}


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

 void cell_destroy(struct likewise_cell *c)
{
	if (!c)
		return;

	if (c->conn)
		ads_destroy(&c->conn);

	talloc_destroy(c);
}

/**********************************************************************
 Free all cell entries and reset the list head to NULL
 *********************************************************************/

 void cell_list_destroy(void)
{
	struct likewise_cell *p = _lw_cell_list;

	while (p) {
		struct likewise_cell *q = p->next;

		cell_destroy(p);

		p = q;
	}

	_lw_cell_list = NULL;

	return;
}

/**********************************************************************
 Add a new cell structure to the list
 *********************************************************************/

 struct likewise_cell* cell_new(void)
{
	struct likewise_cell *c;

	/* Each cell struct is a TALLOC_CTX* */

	c = TALLOC_ZERO_P(NULL, struct likewise_cell);
	if (!c) {
		DEBUG(0,("cell_new: memory allocation failure!\n"));
		return NULL;
	}

	return c;
}

/**********************************************************************
 Add a new cell structure to the list
 *********************************************************************/

 bool cell_list_add(struct likewise_cell * cell)
{
	if (!cell) {
		return false;
	}

	/* Always add to the end */

	DLIST_ADD_END(_lw_cell_list, cell, struct likewise_cell *);

	return true;
}

/**********************************************************************
 Add a new cell structure to the list
 *********************************************************************/

 bool cell_list_remove(struct likewise_cell * cell)
{
	if (!cell) {
		return false;
	}

	/* Remove and drop the cell structure */

	DLIST_REMOVE(_lw_cell_list, cell);
	talloc_destroy(cell);

	return true;
}

/**********************************************************************
 Set the containing DNS domain for a cell
 *********************************************************************/

 void cell_set_dns_domain(struct likewise_cell *c, const char *dns_domain)
{
	c->dns_domain = talloc_strdup(c, dns_domain);
}

/**********************************************************************
 Set ADS connection for a cell
 *********************************************************************/

 void cell_set_connection(struct likewise_cell *c, ADS_STRUCT *ads)
{
	c->conn = ads;
}

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

 void cell_set_flags(struct likewise_cell *c, uint32_t flags)
{
	c->flags |= flags;
}

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

 void cell_clear_flags(struct likewise_cell *c, uint32_t flags)
{
	c->flags &= ~flags;
}

/**********************************************************************
 Set the Cell's DN
 *********************************************************************/

 void cell_set_dn(struct likewise_cell *c, const char *dn)
{
	if ( c->dn) {
		talloc_free(c->dn);
		c->dn = NULL;
	}

	c->dn = talloc_strdup(c, dn);
}

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

 void cell_set_domain_sid(struct likewise_cell *c, struct dom_sid *sid)
{
	sid_copy(&c->domain_sid, sid);
}

/*
 * Query Routines
 */

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

 const char* cell_search_base(struct likewise_cell *c)
{
	if (!c)
		return NULL;

	return talloc_asprintf(c, "cn=%s,%s", ADEX_CELL_RDN, c->dn);
}

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

 bool cell_search_forest(struct likewise_cell *c)
{
	uint32_t test_flags = LWCELL_FLAG_SEARCH_FOREST;

	return ((c->flags & test_flags) == test_flags);
}

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

 uint32_t cell_flags(struct likewise_cell *c)
{
	if (!c)
		return 0;

	return c->flags;
}

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

 const char *cell_dns_domain(struct likewise_cell *c)
{
	if (!c)
		return NULL;

	return c->dns_domain;
}

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

 ADS_STRUCT *cell_connection(struct likewise_cell *c)
{
	if (!c)
		return NULL;

	return c->conn;
}

/*
 * Connection functions
 */

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

 NTSTATUS cell_connect(struct likewise_cell *c)
{
	ADS_STRUCT *ads = NULL;
	ADS_STATUS ads_status;
	fstring dc_name;
	struct sockaddr_storage dcip;
	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;

	/* have to at least have the AD domain name */

	if (!c->dns_domain) {
		nt_status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
		BAIL_ON_NTSTATUS_ERROR(nt_status);
	}

	/* clear out any old information */

	if (c->conn) {
		ads_destroy(&c->conn);
		c->conn = NULL;
	}

	/* now setup the new connection */

	ads = ads_init(c->dns_domain, NULL, NULL);
	BAIL_ON_PTR_ERROR(ads, nt_status);

	ads->auth.password =
	    secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
	ads->auth.realm = SMB_STRDUP(lp_realm());

	/* Make the connection.  We should already have an initial
	   TGT using the machine creds */

	if (cell_flags(c) & LWCELL_FLAG_GC_CELL) {
		ads_status = ads_connect_gc(ads);
	} else {
	  /* Set up server affinity for normal cells and the client
	     site name cache */

	  if (!get_dc_name("", c->dns_domain, dc_name, &dcip)) {
	    nt_status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
	    BAIL_ON_NTSTATUS_ERROR(nt_status);
	  }

	  ads_status = ads_connect(ads);
	}


	c->conn = ads;

	nt_status = ads_ntstatus(ads_status);

done:
	if (!NT_STATUS_IS_OK(nt_status)) {
		ads_destroy(&ads);
		c->conn = NULL;
	}

	return nt_status;
}

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

 NTSTATUS cell_connect_dn(struct likewise_cell **c, const char *dn)
{
	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
	struct likewise_cell *new_cell = NULL;
	char *dns_domain = NULL;

	if (*c || !dn) {
		nt_status = NT_STATUS_INVALID_PARAMETER;
		BAIL_ON_NTSTATUS_ERROR(nt_status);
	}

	if ((new_cell = cell_new()) == NULL) {
		nt_status = NT_STATUS_NO_MEMORY;
		BAIL_ON_NTSTATUS_ERROR(nt_status);
	}

	/* Set the DNS domain, dn, etc ... and add it to the list */

	dns_domain = cell_dn_to_dns(dn);
	cell_set_dns_domain(new_cell, dns_domain);
	SAFE_FREE(dns_domain);

	cell_set_dn(new_cell, dn);

	nt_status = cell_connect(new_cell);
	BAIL_ON_NTSTATUS_ERROR(nt_status);

	*c = new_cell;

done:
	if (!NT_STATUS_IS_OK(nt_status)) {
		DEBUG(1,("LWI: Failled to connect to cell \"%s\" (%s)\n",
			 dn ? dn : "NULL", nt_errstr(nt_status)));
		talloc_destroy(new_cell);
	}

	return nt_status;
}


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

#define MAX_SEARCH_COUNT    2

 ADS_STATUS cell_do_search(struct likewise_cell *c,
			  const char *search_base,
			  int scope,
			  const char *expr,
			  const char **attrs,
			  LDAPMessage ** msg)
{
	int search_count = 0;
	ADS_STATUS status;
	NTSTATUS nt_status;

	/* check for a NULL connection */

	if (!c->conn) {
		nt_status = cell_connect(c);
		if (!NT_STATUS_IS_OK(nt_status)) {
			status = ADS_ERROR_NT(nt_status);
			return status;
		}
	}

	DEBUG(10, ("cell_do_search: Base = %s,  Filter = %s, Scope = %d, GC = %s\n",
		   search_base, expr, scope,
		   c->conn->server.gc ? "yes" : "no"));

	/* we try multiple times in case the ADS_STRUCT is bad
	   and we need to reconnect */

	while (search_count < MAX_SEARCH_COUNT) {
		*msg = NULL;
		status = ads_do_search(c->conn, search_base,
				       scope, expr, attrs, msg);
		if (ADS_ERR_OK(status)) {
			if (DEBUGLEVEL >= 10) {
				LDAPMessage *e = NULL;

				int n = ads_count_replies(c->conn, *msg);

				DEBUG(10,("cell_do_search: Located %d entries\n", n));

				for (e=ads_first_entry(c->conn, *msg);
				     e!=NULL;
				     e = ads_next_entry(c->conn, e))
				{
					char *dn = ads_get_dn(c->conn, talloc_tos(), e);

					DEBUGADD(10,("   dn: %s\n", dn ? dn : "<NULL>"));
					TALLOC_FREE(dn);
				}
			}

			return status;
		}


		DEBUG(5, ("cell_do_search: search[%d] failed (%s)\n",
			  search_count, ads_errstr(status)));

		search_count++;

		/* Houston, we have a problem */

		if (status.error_type == ENUM_ADS_ERROR_LDAP) {
			switch (status.err.rc) {
			case LDAP_TIMELIMIT_EXCEEDED:
			case LDAP_TIMEOUT:
			case -1:	/* we get this error if we cannot contact
					   the LDAP server */
				nt_status = cell_connect(c);
				if (!NT_STATUS_IS_OK(nt_status)) {
					status = ADS_ERROR_NT(nt_status);
					return status;
				}
				break;
			default:
				/* we're all done here */
				return status;
			}
		}
	}

	DEBUG(5, ("cell_do_search: exceeded maximum search count!\n"));

	return ADS_ERROR_NT(NT_STATUS_UNSUCCESSFUL);
}