summaryrefslogtreecommitdiff
path: root/source3/utils/net_util.c
blob: 5829d8910754320b9278ab138e673ccf33c66870 (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
/*
 *  Unix SMB/CIFS implementation.
 *  Helper routines for net
 *  Copyright (C) Volker Lendecke 2006
 *  Copyright (C) Kai Blin 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 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/>.
 */


#include "includes.h"
#include "utils/net.h"
#include "libsmb/namequery.h"
#include "rpc_client/cli_pipe.h"
#include "../librpc/gen_ndr/ndr_lsa_c.h"
#include "rpc_client/cli_lsarpc.h"
#include "../librpc/gen_ndr/ndr_dssetup_c.h"
#include "secrets.h"
#include "../libcli/security/security.h"
#include "libsmb/libsmb.h"
#include "lib/param/param.h"
#include "auth/gensec/gensec.h"

NTSTATUS net_rpc_lookup_name(struct net_context *c,
			     TALLOC_CTX *mem_ctx, struct cli_state *cli,
			     const char *name, const char **ret_domain,
			     const char **ret_name, struct dom_sid *ret_sid,
			     enum lsa_SidType *ret_type)
{
	struct rpc_pipe_client *lsa_pipe = NULL;
	struct policy_handle pol;
	NTSTATUS status, result;
	const char **dom_names;
	struct dom_sid *sids;
	enum lsa_SidType *types;
	struct dcerpc_binding_handle *b;

	ZERO_STRUCT(pol);

	status = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc,
					  &lsa_pipe);
	if (!NT_STATUS_IS_OK(status)) {
		d_fprintf(stderr, _("Could not initialise lsa pipe\n"));
		return status;
	}

	b = lsa_pipe->binding_handle;

	status = rpccli_lsa_open_policy(lsa_pipe, mem_ctx, false,
					SEC_FLAG_MAXIMUM_ALLOWED,
					&pol);
	if (!NT_STATUS_IS_OK(status)) {
		d_fprintf(stderr, "open_policy %s: %s\n", _("failed"),
			  nt_errstr(status));
		return status;
	}

	status = rpccli_lsa_lookup_names(lsa_pipe, mem_ctx, &pol, 1,
					 &name, &dom_names, 1, &sids, &types);

	if (!NT_STATUS_IS_OK(status)) {
		/* This can happen easily, don't log an error */
		goto done;
	}

	if (ret_domain != NULL) {
		*ret_domain = dom_names[0];
	}
	if (ret_name != NULL) {
		*ret_name = talloc_strdup(mem_ctx, name);
	}
	if (ret_sid != NULL) {
		sid_copy(ret_sid, &sids[0]);
	}
	if (ret_type != NULL) {
		*ret_type = types[0];
	}

 done:
	if (is_valid_policy_hnd(&pol)) {
		dcerpc_lsa_Close(b, mem_ctx, &pol, &result);
	}
	TALLOC_FREE(lsa_pipe);

	return status;
}

/****************************************************************************
 Connect to \\server\service.
****************************************************************************/

NTSTATUS connect_to_service(struct net_context *c,
			    struct cli_state **cli_ctx,
			    const struct sockaddr_storage *server_ss,
			    const char *server_name,
			    const char *service_name,
			    const char *service_type)
{
	NTSTATUS nt_status;
	struct cli_credentials *creds = NULL;
	int flags = 0;

	creds = net_context_creds(c, c);
	if (creds == NULL) {
		d_fprintf(stderr, "net_context_creds() failed.\n");
		return NT_STATUS_INTERNAL_ERROR;
	}

	if (strequal(service_type, "IPC")) {
		flags |= CLI_FULL_CONNECTION_IPC;
	}

	nt_status = cli_full_connection_creds(cli_ctx, NULL, server_name,
					server_ss, c->opt_port,
					service_name, service_type,
					creds,
					flags);
	if (!NT_STATUS_IS_OK(nt_status)) {
		d_fprintf(stderr, _("Could not connect to server %s\n"),
			  server_name);

		/* Display a nicer message depending on the result */

		if (NT_STATUS_V(nt_status) ==
		    NT_STATUS_V(NT_STATUS_LOGON_FAILURE))
			d_fprintf(stderr,
				  _("The username or password was not "
				    "correct.\n"));

		if (NT_STATUS_V(nt_status) ==
		    NT_STATUS_V(NT_STATUS_ACCOUNT_LOCKED_OUT))
			d_fprintf(stderr, _("The account was locked out.\n"));

		if (NT_STATUS_V(nt_status) ==
		    NT_STATUS_V(NT_STATUS_ACCOUNT_DISABLED))
			d_fprintf(stderr, _("The account was disabled.\n"));
		return nt_status;
	}

	return nt_status;
}

/****************************************************************************
 Connect to \\server\ipc$.
****************************************************************************/

NTSTATUS connect_to_ipc(struct net_context *c,
			struct cli_state **cli_ctx,
			const struct sockaddr_storage *server_ss,
			const char *server_name)
{
	return connect_to_service(c, cli_ctx, server_ss, server_name, "IPC$",
				  "IPC");
}

/****************************************************************************
 Connect to \\server\ipc$ anonymously.
****************************************************************************/

NTSTATUS connect_to_ipc_anonymous(struct net_context *c,
				struct cli_state **cli_ctx,
				const struct sockaddr_storage *server_ss,
				const char *server_name)
{
	NTSTATUS nt_status;
	struct cli_credentials *anon_creds = NULL;

	anon_creds = cli_credentials_init_anon(c);
	if (anon_creds == NULL) {
		DBG_ERR("cli_credentials_init_anon() failed\n");
		return NT_STATUS_NO_MEMORY;
	}

	nt_status = cli_full_connection_creds(cli_ctx, c->opt_requester_name,
					server_name, server_ss, c->opt_port,
					"IPC$", "IPC",
					anon_creds,
					CLI_FULL_CONNECTION_IPC);

	if (NT_STATUS_IS_OK(nt_status)) {
		return nt_status;
	} else {
		DEBUG(1,("Cannot connect to server (anonymously).  Error was %s\n", nt_errstr(nt_status)));
		return nt_status;
	}
}

/**
 * Connect a server and open a given pipe
 *
 * @param cli_dst		A cli_state
 * @param pipe			The pipe to open
 * @param got_pipe		boolean that stores if we got a pipe
 *
 * @return Normal NTSTATUS return.
 **/
NTSTATUS connect_dst_pipe(struct net_context *c, struct cli_state **cli_dst,
			  struct rpc_pipe_client **pp_pipe_hnd,
			  const struct ndr_interface_table *table)
{
	NTSTATUS nt_status;
	char *server_name = SMB_STRDUP("127.0.0.1");
	struct cli_state *cli_tmp = NULL;
	struct rpc_pipe_client *pipe_hnd = NULL;

	if (server_name == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	if (c->opt_destination) {
		SAFE_FREE(server_name);
		if ((server_name = SMB_STRDUP(c->opt_destination)) == NULL) {
			return NT_STATUS_NO_MEMORY;
		}
	}

	/* make a connection to a named pipe */
	nt_status = connect_to_ipc(c, &cli_tmp, NULL, server_name);
	if (!NT_STATUS_IS_OK(nt_status)) {
		SAFE_FREE(server_name);
		return nt_status;
	}

	nt_status = cli_rpc_pipe_open_noauth(cli_tmp, table,
					     &pipe_hnd);
	if (!NT_STATUS_IS_OK(nt_status)) {
		DEBUG(0, ("couldn't not initialize pipe\n"));
		cli_shutdown(cli_tmp);
		SAFE_FREE(server_name);
		return nt_status;
	}

	*cli_dst = cli_tmp;
	*pp_pipe_hnd = pipe_hnd;
	SAFE_FREE(server_name);

	return nt_status;
}

/****************************************************************************
 Use the local machine account (krb) and password for this session.
****************************************************************************/

int net_use_krb_machine_account(struct net_context *c)
{
	char *user_name = NULL;

	if (!secrets_init()) {
		d_fprintf(stderr,_("ERROR: Unable to open secrets database\n"));
		exit(1);
	}

	c->opt_password = secrets_fetch_machine_password(
				c->opt_target_workgroup, NULL, NULL);
	if (asprintf(&user_name, "%s$@%s", lp_netbios_name(), lp_realm()) == -1) {
		return -1;
	}
	c->opt_user_name = user_name;
	c->opt_user_specified = true;
	return 0;
}

bool net_find_server(struct net_context *c,
			const char *domain,
			unsigned flags,
			struct sockaddr_storage *server_ss,
			char **server_name)
{
	const char *d = domain ? domain : c->opt_target_workgroup;

	if (c->opt_host) {
		*server_name = SMB_STRDUP(c->opt_host);
	}

	if (c->opt_have_ip) {
		*server_ss = c->opt_dest_ip;
		if (!*server_name) {
			char addr[INET6_ADDRSTRLEN];
			print_sockaddr(addr, sizeof(addr), &c->opt_dest_ip);
			*server_name = SMB_STRDUP(addr);
		}
	} else if (*server_name) {
		/* resolve the IP address */
		if (!resolve_name(*server_name, server_ss, 0x20, false))  {
			DEBUG(1,("Unable to resolve server name\n"));
			return false;
		}
	} else if (flags & NET_FLAGS_PDC) {
		fstring dc_name;
		struct sockaddr_storage pdc_ss;

		if (!get_pdc_ip(d, &pdc_ss)) {
			DEBUG(1,("Unable to resolve PDC server address\n"));
			return false;
		}

		if (is_zero_addr(&pdc_ss)) {
			return false;
		}

		if (!name_status_find(d, 0x1b, 0x20, &pdc_ss, dc_name)) {
			return false;
		}

		*server_name = SMB_STRDUP(dc_name);
		*server_ss = pdc_ss;
	} else if (flags & NET_FLAGS_DMB) {
		struct sockaddr_storage msbrow_ss;
		char addr[INET6_ADDRSTRLEN];

		/*  if (!resolve_name(MSBROWSE, &msbrow_ip, 1, false)) */
		if (!resolve_name(d, &msbrow_ss, 0x1B, false))  {
			DEBUG(1,("Unable to resolve domain browser via name lookup\n"));
			return false;
		}
		*server_ss = msbrow_ss;
		print_sockaddr(addr, sizeof(addr), server_ss);
		*server_name = SMB_STRDUP(addr);
	} else if (flags & NET_FLAGS_MASTER) {
		struct sockaddr_storage brow_ss;
		char addr[INET6_ADDRSTRLEN];
		if (!resolve_name(d, &brow_ss, 0x1D, false))  {
				/* go looking for workgroups */
			DEBUG(1,("Unable to resolve master browser via name lookup\n"));
			return false;
		}
		*server_ss = brow_ss;
		print_sockaddr(addr, sizeof(addr), server_ss);
		*server_name = SMB_STRDUP(addr);
	} else if (!(flags & NET_FLAGS_LOCALHOST_DEFAULT_INSANE)) {
		if (!interpret_string_addr(server_ss,
					"127.0.0.1", AI_NUMERICHOST)) {
			DEBUG(1,("Unable to resolve 127.0.0.1\n"));
			return false;
		}
		*server_name = SMB_STRDUP("127.0.0.1");
	}

	if (!*server_name) {
		DEBUG(1,("no server to connect to\n"));
		return false;
	}

	return true;
}

bool net_find_pdc(struct sockaddr_storage *server_ss,
		fstring server_name,
		const char *domain_name)
{
	if (!get_pdc_ip(domain_name, server_ss)) {
		return false;
	}
	if (is_zero_addr(server_ss)) {
		return false;
	}

	if (!name_status_find(domain_name, 0x1b, 0x20, server_ss, server_name)) {
		return false;
	}

	return true;
}

NTSTATUS net_make_ipc_connection(struct net_context *c, unsigned flags,
				 struct cli_state **pcli)
{
	return net_make_ipc_connection_ex(c, c->opt_workgroup, NULL, NULL, flags, pcli);
}

NTSTATUS net_make_ipc_connection_ex(struct net_context *c ,const char *domain,
				    const char *server,
				    const struct sockaddr_storage *pss,
				    unsigned flags, struct cli_state **pcli)
{
	char *server_name = NULL;
	struct sockaddr_storage server_ss;
	struct cli_state *cli = NULL;
	NTSTATUS nt_status;

	if ( !server || !pss ) {
		if (!net_find_server(c, domain, flags, &server_ss,
				     &server_name)) {
			d_fprintf(stderr, _("Unable to find a suitable server "
				"for domain %s\n"), domain);
			nt_status = NT_STATUS_UNSUCCESSFUL;
			goto done;
		}
	} else {
		server_name = SMB_STRDUP( server );
		server_ss = *pss;
	}

	if (flags & NET_FLAGS_ANONYMOUS) {
		nt_status = connect_to_ipc_anonymous(c, &cli, &server_ss,
						     server_name);
	} else {
		nt_status = connect_to_ipc(c, &cli, &server_ss,
					   server_name);
	}

	/* store the server in the affinity cache if it was a PDC */

	if ( (flags & NET_FLAGS_PDC) && NT_STATUS_IS_OK(nt_status) )
		saf_store(cli->server_domain, server_name);

	SAFE_FREE(server_name);
	if (!NT_STATUS_IS_OK(nt_status)) {
		d_fprintf(stderr, _("Connection failed: %s\n"),
			  nt_errstr(nt_status));
		cli = NULL;
	} else if (c->opt_request_timeout) {
		cli_set_timeout(cli, c->opt_request_timeout * 1000);
	}

done:
	if (pcli != NULL) {
		*pcli = cli;
	}
	return nt_status;
}

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

const char *net_prompt_pass(struct net_context *c, const char *user)
{
	char *prompt = NULL;
	char pwd[256] = {0};
	int rc;

	if (c->opt_password) {
		return c->opt_password;
	}

	if (c->opt_machine_pass) {
		return NULL;
	}

	if (c->opt_kerberos && !c->opt_user_specified) {
		return NULL;
	}

	if (c->opt_ccache) {
		return NULL;
	}

	if (asprintf(&prompt, _("Enter %s's password:"), user) == -1) {
		return NULL;
	}

	rc = samba_getpass(prompt, pwd, sizeof(pwd), false, false);
	SAFE_FREE(prompt);
	if (rc < 0) {
		return NULL;
	}

	return SMB_STRDUP(pwd);
}

struct cli_credentials *net_context_creds(struct net_context *c,
					  TALLOC_CTX *mem_ctx)
{
	struct cli_credentials *creds = NULL;
	struct loadparm_context *lp_ctx = NULL;

	c->opt_password = net_prompt_pass(c, c->opt_user_name);

	creds = cli_credentials_init(mem_ctx);
	if (creds == NULL) {
		d_printf("ERROR: Unable to allocate memory!\n");
		exit(-1);
	}

	lp_ctx = loadparm_init_s3(creds, loadparm_s3_helpers());
	if (lp_ctx == NULL) {
		d_printf("loadparm_init_s3 failed\n");
		exit(-1);
	}

	cli_credentials_guess(creds, lp_ctx);

	if (c->opt_kerberos && c->opt_user_specified) {
		cli_credentials_set_kerberos_state(creds,
						   CRED_AUTO_USE_KERBEROS);
	} else if (c->opt_kerberos) {
		cli_credentials_set_kerberos_state(creds,
						   CRED_MUST_USE_KERBEROS);
	} else {
		cli_credentials_set_kerberos_state(creds,
						   CRED_DONT_USE_KERBEROS);
	}

	if (c->opt_ccache) {
		uint32_t features;

		features = cli_credentials_get_gensec_features(creds);
		features |= GENSEC_FEATURE_NTLM_CCACHE;
		cli_credentials_set_gensec_features(creds, features);

		if (c->opt_password != NULL && strlen(c->opt_password) == 0) {
			/*
			 * some callers pass "" as no password
			 *
			 * GENSEC_FEATURE_NTLM_CCACHE only handles
			 * NULL as no password.
			 */
			c->opt_password = NULL;
		}
	}

	if (c->opt_user_specified) {
		const char *default_domain =
			cli_credentials_get_domain(creds);
		char *username = NULL;
		const char *domain = NULL;
		char *tmp = NULL;
		char *p = NULL;
		bool is_default;

		tmp = talloc_strdup(creds, c->opt_user_name);
		if (tmp == NULL) {
			exit(-1);
		}
		username = tmp;

		/* allow for workgroups as part of the username */
		if ((p = strchr_m(tmp, '\\')) ||
		    (p = strchr_m(tmp, '/')) ||
		    (p = strchr_m(tmp, *lp_winbind_separator()))) {
			*p = 0;
			username = p + 1;
			domain = tmp;
		}

		if (domain == NULL) {
			domain = c->opt_workgroup;
		}

		/*
		 * Don't overwrite the value from cli_credentials_guess()
		 * with CRED_SPECIFIED, unless we have to.
		 */
		is_default = strequal_m(domain, default_domain);
		if (!is_default) {
			cli_credentials_set_domain(creds,
						   domain,
						   CRED_SPECIFIED);
		}

		cli_credentials_set_username(creds,
					     username,
					     CRED_SPECIFIED);
		cli_credentials_set_password(creds,
					     c->opt_password,
					     CRED_SPECIFIED);
	}

	if (c->smb_encrypt) {
		cli_credentials_set_smb_encryption(creds,
						   SMB_ENCRYPTION_REQUIRED,
						   CRED_SPECIFIED);
	}

	return creds;
}

int net_run_function(struct net_context *c, int argc, const char **argv,
		      const char *whoami, struct functable *table)
{
	int i;

	if (argc != 0) {
		for (i=0; table[i].funcname != NULL; i++) {
			if (strcasecmp_m(argv[0], table[i].funcname) == 0)
				return table[i].fn(c, argc-1, argv+1);
		}
	}

	if (c->display_usage == false) {
		d_fprintf(stderr, _("Invalid command: %s %s\n"), whoami,
			  (argc > 0)?argv[0]:"");
	}
	d_printf(_("Usage:\n"));
	for (i=0; table[i].funcname != NULL; i++) {
		if(c->display_usage == false)
			d_printf("%s %-15s %s\n", whoami, table[i].funcname,
				 _(table[i].description));
		else
			d_printf("%s\n", _(table[i].usage));
	}

	return c->display_usage?0:-1;
}

void net_display_usage_from_functable(struct functable *table)
{
	int i;
	for (i=0; table[i].funcname != NULL; i++) {
		d_printf("%s\n", _(table[i].usage));
	}
}

const char *net_share_type_str(int num_type)
{
	switch(num_type) {
		case 0: return _("Disk");
		case 1: return _("Print");
		case 2: return _("Dev");
		case 3: return _("IPC");
		default: return _("Unknown");
	}
}

static NTSTATUS net_scan_dc_noad(struct net_context *c,
				 struct cli_state *cli,
				 struct net_dc_info *dc_info)
{
	TALLOC_CTX *mem_ctx = talloc_tos();
	struct rpc_pipe_client *pipe_hnd = NULL;
	struct dcerpc_binding_handle *b;
	NTSTATUS status, result;
	struct policy_handle pol;
	union lsa_PolicyInformation *info;

	ZERO_STRUCTP(dc_info);
	ZERO_STRUCT(pol);

	status = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc,
					  &pipe_hnd);
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	b = pipe_hnd->binding_handle;

	status = dcerpc_lsa_open_policy(b, mem_ctx,
					false,
					SEC_FLAG_MAXIMUM_ALLOWED,
					&pol,
					&result);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}
	if (!NT_STATUS_IS_OK(result)) {
		status = result;
		goto done;
	}

	status = dcerpc_lsa_QueryInfoPolicy(b, mem_ctx,
					    &pol,
					    LSA_POLICY_INFO_ACCOUNT_DOMAIN,
					    &info,
					    &result);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}
	if (!NT_STATUS_IS_OK(result)) {
		status = result;
		goto done;
	}

	dc_info->netbios_domain_name = talloc_strdup(mem_ctx, info->account_domain.name.string);
	if (dc_info->netbios_domain_name == NULL) {
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}

 done:
	if (is_valid_policy_hnd(&pol)) {
		dcerpc_lsa_Close(b, mem_ctx, &pol, &result);
	}

	TALLOC_FREE(pipe_hnd);

	return status;
}

NTSTATUS net_scan_dc(struct net_context *c,
		     struct cli_state *cli,
		     struct net_dc_info *dc_info)
{
	TALLOC_CTX *mem_ctx = talloc_tos();
	struct rpc_pipe_client *dssetup_pipe = NULL;
	struct dcerpc_binding_handle *dssetup_handle = NULL;
	union dssetup_DsRoleInfo info;
	NTSTATUS status;
	WERROR werr;

	ZERO_STRUCTP(dc_info);

	status = cli_rpc_pipe_open_noauth(cli, &ndr_table_dssetup,
					  &dssetup_pipe);
        if (!NT_STATUS_IS_OK(status)) {
		DEBUG(10,("net_scan_dc: failed to open dssetup pipe with %s, "
			"retrying with lsa pipe\n", nt_errstr(status)));
		return net_scan_dc_noad(c, cli, dc_info);
	}
	dssetup_handle = dssetup_pipe->binding_handle;

	status = dcerpc_dssetup_DsRoleGetPrimaryDomainInformation(dssetup_handle, mem_ctx,
								  DS_ROLE_BASIC_INFORMATION,
								  &info,
								  &werr);
	TALLOC_FREE(dssetup_pipe);

	if (NT_STATUS_IS_OK(status)) {
		status = werror_to_ntstatus(werr);
	}
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	dc_info->is_dc	= (info.basic.role & (DS_ROLE_PRIMARY_DC|DS_ROLE_BACKUP_DC));
	dc_info->is_pdc	= (info.basic.role & DS_ROLE_PRIMARY_DC);
	dc_info->is_ad	= (info.basic.flags & DS_ROLE_PRIMARY_DS_RUNNING);
	dc_info->is_mixed_mode = (info.basic.flags & DS_ROLE_PRIMARY_DS_MIXED_MODE);
	dc_info->netbios_domain_name = talloc_strdup(mem_ctx, info.basic.domain);
	dc_info->dns_domain_name = talloc_strdup(mem_ctx, info.basic.dns_domain);
	dc_info->forest_name = talloc_strdup(mem_ctx, info.basic.forest);

	return NT_STATUS_OK;
}