summaryrefslogtreecommitdiff
path: root/source3/nmbd/nmbd_processlogon.c
blob: 273f3d308a93b44916559cf45cb776fb770de69b (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
/* 
   Unix SMB/CIFS implementation.
   NBT netbios routines and daemon - version 2
   Copyright (C) Andrew Tridgell 1994-1998
   Copyright (C) Luke Kenneth Casson Leighton 1994-1998
   Copyright (C) Jeremy Allison 1994-2003
   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
   
   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/>.
   
   Revision History:

*/

#include "includes.h"
#include "../libcli/netlogon.h"
#include "../libcli/cldap/cldap.h"
#include "../lib/tsocket/tsocket.h"
#include "../libcli/security/dom_sid.h"
#include "secrets.h"
#include "nmbd/nmbd.h"

struct sam_database_info {
        uint32 index;
        uint32 serial_lo, serial_hi;
        uint32 date_lo, date_hi;
};

/**
 * check whether the client belongs to the hosts
 * for which initial logon should be delayed...
 */
static bool delay_logon(const char *peer_name, const char *peer_addr)
{
	const char **delay_list = lp_init_logon_delayed_hosts();
	const char *peer[2];

	if (delay_list == NULL) {
		return False;
	}

	peer[0] = peer_name;
	peer[1] = peer_addr;

	return list_match(delay_list, (const char *)peer, client_match);
}

static void delayed_init_logon_handler(struct event_context *event_ctx,
				       struct timed_event *te,
				       struct timeval now,
				       void *private_data)
{
	struct packet_struct *p = (struct packet_struct *)private_data;

	DEBUG(10, ("delayed_init_logon_handler (%lx): re-queuing packet.\n",
		   (unsigned long)te));

	queue_packet(p);

	TALLOC_FREE(te);
}

struct nmbd_proxy_logon_context {
	struct cldap_socket *cldap_sock;
};

static struct nmbd_proxy_logon_context *global_nmbd_proxy_logon;

bool initialize_nmbd_proxy_logon(void)
{
	const char *cldap_server = lp_parm_const_string(-1, "nmbd_proxy_logon",
						        "cldap_server", NULL);
	struct nmbd_proxy_logon_context *ctx;
	NTSTATUS status;
	struct in_addr addr;
	char addrstr[INET_ADDRSTRLEN];
	const char *server_str;
	int ret;
	struct tsocket_address *server_addr;

	if (!cldap_server) {
		return true;
	}

	addr = interpret_addr2(cldap_server);
	server_str = inet_ntop(AF_INET, &addr,
			     addrstr, sizeof(addrstr));
	if (!server_str || strcmp("0.0.0.0", server_str) == 0) {
		DEBUG(0,("Failed to resolve[%s] for nmbd_proxy_logon\n",
			 cldap_server));
		return false;
	}

	ctx = talloc_zero(nmbd_event_context(),
			  struct nmbd_proxy_logon_context);
	if (!ctx) {
		return false;
	}

	ret = tsocket_address_inet_from_strings(ctx, "ipv4",
						server_str, LDAP_PORT,
						&server_addr);
	if (ret != 0) {
		TALLOC_FREE(ctx);
		status = map_nt_error_from_unix(errno);
		DEBUG(0,("Failed to create cldap tsocket_address for %s - %s\n",
			 server_str, nt_errstr(status)));
		return false;
	}

	/* we create a connected udp socket */
	status = cldap_socket_init(ctx, nmbd_event_context(), NULL,
				   server_addr, &ctx->cldap_sock);
	TALLOC_FREE(server_addr);
	if (!NT_STATUS_IS_OK(status)) {
		TALLOC_FREE(ctx);
		DEBUG(0,("failed to create cldap socket for %s: %s\n",
			server_str, nt_errstr(status)));
		return false;
	}

	global_nmbd_proxy_logon = ctx;
	return true;
}

struct nmbd_proxy_logon_state {
	struct in_addr local_ip;
	struct packet_struct *p;
	const char *remote_name;
	uint8_t remote_name_type;
	const char *remote_mailslot;
	struct nbt_netlogon_packet req;
	struct nbt_netlogon_response resp;
	struct cldap_netlogon io;
};

static int nmbd_proxy_logon_state_destructor(struct nmbd_proxy_logon_state *s)
{
	s->p->locked = false;
	free_packet(s->p);
	return 0;
}

static void nmbd_proxy_logon_done(struct tevent_req *subreq);

static void nmbd_proxy_logon(struct nmbd_proxy_logon_context *ctx,
			     struct in_addr local_ip,
			     struct packet_struct *p,
			     uint8_t *buf,
			     uint32_t len)
{
	struct nmbd_proxy_logon_state *state;
	enum ndr_err_code ndr_err;
	DATA_BLOB blob = data_blob_const(buf, len);
	const char *computer_name = NULL;
	const char *mailslot_name = NULL;
	const char *user_name = NULL;
	const char *domain_sid = NULL;
	uint32_t acct_control = 0;
	uint32_t nt_version = 0;
	struct tevent_req *subreq;
	fstring source_name;
	struct dgram_packet *dgram = &p->packet.dgram;

	state = TALLOC_ZERO_P(ctx, struct nmbd_proxy_logon_state);
	if (!state) {
		DEBUG(0,("failed to allocate nmbd_proxy_logon_state\n"));
		return;
	}

	pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
	state->remote_name = talloc_strdup(state, source_name);
	state->remote_name_type = dgram->source_name.name_type,
	state->local_ip = local_ip;
	state->p = p;

	ndr_err = ndr_pull_struct_blob(
		&blob, state, &state->req,
		(ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
		NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
		DEBUG(0,("failed parse nbt_netlogon_packet: %s\n",
			nt_errstr(status)));
		TALLOC_FREE(state);
		return;
	}

	if (DEBUGLEVEL >= 10) {
		DEBUG(10, ("nmbd_proxy_logon:\n"));
		NDR_PRINT_DEBUG(nbt_netlogon_packet, &state->req);
	}

	switch (state->req.command) {
	case LOGON_SAM_LOGON_REQUEST:
		computer_name	= state->req.req.logon.computer_name;
		user_name	= state->req.req.logon.user_name;
		mailslot_name	= state->req.req.logon.mailslot_name;
		acct_control	= state->req.req.logon.acct_control;
		if (state->req.req.logon.sid_size > 0) {
			domain_sid = dom_sid_string(state,
						    &state->req.req.logon.sid);
			if (!domain_sid) {
				DEBUG(0,("failed to get a string for sid\n"));
				TALLOC_FREE(state);
				return;
			}
		}
		nt_version	= state->req.req.logon.nt_version;
		break;

	default:
		/* this can't happen as the caller already checks the command */
		break;
	}

	state->remote_mailslot = mailslot_name;

	if (user_name && strlen(user_name) == 0) {
		user_name = NULL;
	}

	if (computer_name && strlen(computer_name) == 0) {
		computer_name = NULL;
	}

	/*
	 * as the socket is connected,
	 * we don't need to specify the destination
	 */
	state->io.in.dest_address	= NULL;
	state->io.in.dest_port		= 0;
	state->io.in.realm		= NULL;
	state->io.in.host		= computer_name;
	state->io.in.user		= user_name;
	state->io.in.domain_guid	= NULL;
	state->io.in.domain_sid		= domain_sid;
	state->io.in.acct_control	= acct_control;
	state->io.in.version		= nt_version;
	state->io.in.map_response	= false;

	subreq = cldap_netlogon_send(state,
				     ctx->cldap_sock,
				     &state->io);
	if (!subreq) {
		DEBUG(0,("failed to send cldap netlogon call\n"));
		TALLOC_FREE(state);
		return;
	}
	tevent_req_set_callback(subreq, nmbd_proxy_logon_done, state);

	/* we reply async */
	state->p->locked = true;
	talloc_set_destructor(state, nmbd_proxy_logon_state_destructor);
}

static void nmbd_proxy_logon_done(struct tevent_req *subreq)
{
	struct nmbd_proxy_logon_state *state =
		tevent_req_callback_data(subreq,
		struct nmbd_proxy_logon_state);
	NTSTATUS status;
	DATA_BLOB response = data_blob_null;

	status = cldap_netlogon_recv(subreq, state, &state->io);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0,("failed to recv cldap netlogon call: %s\n",
			nt_errstr(status)));
		TALLOC_FREE(state);
		return;
	}

	status = push_netlogon_samlogon_response(&response, state, 
						 &state->io.out.netlogon);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0,("failed to push netlogon_samlogon_response: %s\n",
			nt_errstr(status)));
		TALLOC_FREE(state);
		return;
	}

	send_mailslot(true, state->remote_mailslot,
		      (char *)response.data, response.length,
		      global_myname(), 0x0,
		      state->remote_name,
		      state->remote_name_type,
		      state->p->ip,
		      state->local_ip,
		      state->p->port);
	TALLOC_FREE(state);
}

/****************************************************************************
Process a domain logon packet
**************************************************************************/

void process_logon_packet(struct packet_struct *p, char *buf,int len, 
                          const char *mailslot)
{
	struct dgram_packet *dgram = &p->packet.dgram;
	fstring my_name;
	fstring reply_name;
	char outbuf[1024];
	int code;
	uint16 token = 0;
	uint32 ntversion = 0;
	uint16 lmnttoken = 0;
	uint16 lm20token = 0;
	uint32 domainsidsize;
	bool short_request = False;
	char *getdc;
	char *uniuser; /* Unicode user name. */
	fstring ascuser;
	char *unicomp; /* Unicode computer name. */
	size_t size;
	struct sockaddr_storage ss;
	const struct sockaddr_storage *pss;
	struct in_addr ip;

	in_addr_to_sockaddr_storage(&ss, p->ip);
	pss = iface_ip((struct sockaddr *)&ss);
	if (!pss) {
		DEBUG(5,("process_logon_packet:can't find outgoing interface "
			"for packet from IP %s\n",
			inet_ntoa(p->ip) ));
		return;
	}
	ip = ((struct sockaddr_in *)pss)->sin_addr;

	memset(outbuf, 0, sizeof(outbuf));

	if (!lp_domain_logons()) {
		DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
logons are not enabled.\n", inet_ntoa(p->ip) ));
		return;
	}

	fstrcpy(my_name, global_myname());

	code = get_safe_SVAL(buf,len,buf,0,-1);
	DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));

	switch (code) {
		case 0:
			{
				fstring mach_str, user_str, getdc_str;
				char *q = buf + 2;
				char *machine = q;
				char *user = skip_string(buf,len,machine);

				if (!user || PTR_DIFF(user, buf) >= len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}
				getdc = skip_string(buf,len,user);

				if (!getdc || PTR_DIFF(getdc, buf) >= len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}
				q = skip_string(buf,len,getdc);

				if (!q || PTR_DIFF(q + 5, buf) > len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}
				token = SVAL(q,3);

				fstrcpy(reply_name,my_name);

				pull_ascii_fstring(mach_str, machine);
				pull_ascii_fstring(user_str, user);
				pull_ascii_fstring(getdc_str, getdc);

				DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
					mach_str,inet_ntoa(p->ip),user_str,token));

				q = outbuf;
				SSVAL(q, 0, 6);
				q += 2;

				fstrcpy(reply_name, "\\\\");
				fstrcat(reply_name, my_name);
				size = push_ascii(q,reply_name,
						sizeof(outbuf)-PTR_DIFF(q, outbuf),
						STR_TERMINATE);
				if (size == (size_t)-1) {
					return;
				}
				q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */

				SSVAL(q, 0, token);
				q += 2;

				dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));

				send_mailslot(True, getdc_str,
						outbuf,PTR_DIFF(q,outbuf),
						global_myname(), 0x0,
						mach_str,
						dgram->source_name.name_type,
						p->ip, ip, p->port);
				break;
			}

		case LOGON_PRIMARY_QUERY:
			{
				fstring mach_str, getdc_str;
				fstring source_name;
				char *q = buf + 2;
				char *machine = q;

				if (!lp_domain_master()) {
					/* We're not Primary Domain Controller -- ignore this */
					return;
				}

				getdc = skip_string(buf,len,machine);

				if (!getdc || PTR_DIFF(getdc, buf) >= len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}
				q = skip_string(buf,len,getdc);

				if (!q || PTR_DIFF(q, buf) >= len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}
				q = ALIGN2(q, buf);

				/* At this point we can work out if this is a W9X or NT style
				   request. Experiments show that the difference is wether the
				   packet ends here. For a W9X request we now end with a pair of
				   bytes (usually 0xFE 0xFF) whereas with NT we have two further
				   strings - the following is a simple way of detecting this */

				if (len - PTR_DIFF(q, buf) <= 3) {
					short_request = True;
				} else {
					unicomp = q;

					if (PTR_DIFF(q, buf) >= len) {
						DEBUG(0,("process_logon_packet: bad packet\n"));
						return;
					}

					/* A full length (NT style) request */
					q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));

					if (PTR_DIFF(q, buf) >= len) {
						DEBUG(0,("process_logon_packet: bad packet\n"));
						return;
					}

					if (len - PTR_DIFF(q, buf) > 8) {
						/* with NT5 clients we can sometimes
							get additional data - a length specificed string
							containing the domain name, then 16 bytes of
							data (no idea what it is) */
						int dom_len = CVAL(q, 0);
						q++;
						if (dom_len != 0) {
							q += dom_len + 1;
						}
						q += 16;
					}

					if (PTR_DIFF(q + 8, buf) > len) {
						DEBUG(0,("process_logon_packet: bad packet\n"));
						return;
					}

					ntversion = IVAL(q, 0);
					lmnttoken = SVAL(q, 4);
					lm20token = SVAL(q, 6);
				}

				/* Construct reply. */
				q = outbuf;
				SSVAL(q, 0, NETLOGON_RESPONSE_FROM_PDC);
				q += 2;

				fstrcpy(reply_name,my_name);
				size = push_ascii(q, reply_name,
						sizeof(outbuf)-PTR_DIFF(q, outbuf),
						STR_TERMINATE);
				if (size == (size_t)-1) {
					return;
				}
				q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */

				/* PDC and domain name */
				if (!short_request) {
					/* Make a full reply */
					q = ALIGN2(q, outbuf);

					q += dos_PutUniCode(q, my_name,
						sizeof(outbuf) - PTR_DIFF(q, outbuf),
						True); /* PDC name */
					q += dos_PutUniCode(q, lp_workgroup(),
						sizeof(outbuf) - PTR_DIFF(q, outbuf),
						True); /* Domain name*/
					if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
						return;
					}
					SIVAL(q, 0, 1); /* our nt version */
					SSVAL(q, 4, 0xffff); /* our lmnttoken */
					SSVAL(q, 6, 0xffff); /* our lm20token */
					q += 8;
				}

				/* RJS, 21-Feb-2000, we send a short reply if the request was short */

				pull_ascii_fstring(mach_str, machine);

				DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, \
reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
					mach_str,inet_ntoa(p->ip), reply_name, lp_workgroup(),
					NETLOGON_RESPONSE_FROM_PDC, (uint32)ntversion, (uint32)lmnttoken,
					(uint32)lm20token ));

				dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));

				pull_ascii_fstring(getdc_str, getdc);
				pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);

				send_mailslot(True, getdc_str,
					outbuf,PTR_DIFF(q,outbuf),
					global_myname(), 0x0,
					source_name,
					dgram->source_name.name_type,
					p->ip, ip, p->port);
				return;
			}

		case LOGON_SAM_LOGON_REQUEST:

			{
				fstring getdc_str;
				fstring source_name;
				char *source_addr;
				char *q = buf + 2;
				fstring asccomp;

				if (global_nmbd_proxy_logon) {
					nmbd_proxy_logon(global_nmbd_proxy_logon,
							 ip, p, (uint8_t *)buf, len);
					return;
				}

				q += 2;

				if (PTR_DIFF(q, buf) >= len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}

				unicomp = q;
				uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));

				if (PTR_DIFF(uniuser, buf) >= len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}

				getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));

				if (PTR_DIFF(getdc, buf) >= len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}

				q = skip_string(buf,len,getdc);

				if (!q || PTR_DIFF(q + 8, buf) >= len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}

				q += 4; /* Account Control Bits - indicating username type */
				domainsidsize = IVAL(q, 0);
				q += 4;

				DEBUG(5,("process_logon_packet: LOGON_SAM_LOGON_REQUEST sidsize %d, len = %d\n", domainsidsize, len));

				if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
					q += domainsidsize;
					q = ALIGN4(q, buf);
				}

				DEBUG(5,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %ld\n", len, (unsigned long)PTR_DIFF(q, buf) ));

				if (len - PTR_DIFF(q, buf) > 8) {
					/* with NT5 clients we can sometimes
						get additional data - a length specificed string
						containing the domain name, then 16 bytes of
						data (no idea what it is) */
					int dom_len = CVAL(q, 0);
					q++;
					if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
						q += dom_len + 1;
					}
					q += 16;
				}

				if (PTR_DIFF(q + 8, buf) > len) {
					DEBUG(0,("process_logon_packet: bad packet\n"));
					return;
				}

				ntversion = IVAL(q, 0);
				lmnttoken = SVAL(q, 4);
				lm20token = SVAL(q, 6);
				q += 8;

				DEBUG(3,("process_logon_packet: LOGON_SAM_LOGON_REQUEST sidsize %d ntv %d\n", domainsidsize, ntversion));

				/*
				 * we respond regadless of whether the machine is in our password 
				 * database. If it isn't then we let smbd send an appropriate error.
				 * Let's ignore the SID.
				 */
				pull_ucs2_fstring(ascuser, uniuser);
				pull_ucs2_fstring(asccomp, unicomp);
				DEBUG(5,("process_logon_packet: LOGON_SAM_LOGON_REQUEST user %s\n", ascuser));

				fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
				fstrcat(reply_name, my_name);

				DEBUG(5,("process_logon_packet: LOGON_SAM_LOGON_REQUEST request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
					asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
				LOGON_SAM_LOGON_RESPONSE ,lmnttoken));

				/* Construct reply. */

				q = outbuf;
				/* we want the simple version unless we are an ADS PDC..which means  */
				/* never, at least for now */
				if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
					if (SVAL(uniuser, 0) == 0) {
						SSVAL(q, 0, LOGON_SAM_LOGON_USER_UNKNOWN);	/* user unknown */
					} else {
						SSVAL(q, 0, LOGON_SAM_LOGON_RESPONSE);
					}

					q += 2;

					q += dos_PutUniCode(q, reply_name,
						sizeof(outbuf) - PTR_DIFF(q, outbuf),
						True);
					q += dos_PutUniCode(q, ascuser,
						sizeof(outbuf) - PTR_DIFF(q, outbuf),
						True);
					q += dos_PutUniCode(q, lp_workgroup(),
						sizeof(outbuf) - PTR_DIFF(q, outbuf),
						True);
				}
#ifdef HAVE_ADS
				else {
					struct GUID domain_guid;
					UUID_FLAT flat_guid;
					char *domain;
					char *hostname;
					char *component, *dc, *q1;
					char *q_orig = q;
					int str_offset;
					char *saveptr = NULL;

					domain = get_mydnsdomname(talloc_tos());
					if (!domain) {
						DEBUG(2,
						("get_mydnsdomname failed.\n"));
						return;
					}
					hostname = get_myname(talloc_tos());
					if (!hostname) {
						DEBUG(2,
						("get_myname failed.\n"));
						return;
					}

					if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
						return;
					}
					if (SVAL(uniuser, 0) == 0) {
						SIVAL(q, 0, LOGON_SAM_LOGON_USER_UNKNOWN_EX);	/* user unknown */
					} else {
						SIVAL(q, 0, LOGON_SAM_LOGON_RESPONSE_EX);
					}
					q += 4;

					SIVAL(q, 0, NBT_SERVER_PDC|NBT_SERVER_GC|NBT_SERVER_LDAP|NBT_SERVER_DS|
						NBT_SERVER_KDC|NBT_SERVER_TIMESERV|NBT_SERVER_CLOSEST|NBT_SERVER_WRITABLE);
					q += 4;

					/* Push Domain GUID */
					if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < UUID_FLAT_SIZE) {
						return;
					}
					if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
						DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
						return;
					}

					smb_uuid_pack(domain_guid, &flat_guid);
					memcpy(q, &flat_guid.info, UUID_FLAT_SIZE);
					q += UUID_FLAT_SIZE;

					/* Forest */
					str_offset = q - q_orig;
					dc = domain;
					q1 = q;
					while ((component = strtok_r(dc, ".", &saveptr)) != NULL) {
						dc = NULL;
						if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
							return;
						}
						size = push_ascii(&q[1], component,
							sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
							0);
						if (size == (size_t)-1 || size > 0xff) {
							return;
						}
						SCVAL(q, 0, size);
						q += (size + 1);
					}

					/* Unk0 */
					if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
						return;
					}
					SCVAL(q, 0, 0);
					q++;

					/* Domain */
					SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
					SCVAL(q, 1, str_offset & 0xFF);
					q += 2;

					/* Hostname */
					size = push_ascii(&q[1], hostname,
							sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
							0);
					if (size == (size_t)-1 || size > 0xff) {
						return;
					}
					SCVAL(q, 0, size);
					q += (size + 1);

					if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 3) {
						return;
					}

					SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
					SCVAL(q, 1, str_offset & 0xFF);
					q += 2;

					/* NETBIOS of domain */
					size = push_ascii(&q[1], lp_workgroup(),
							sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
							STR_UPPER);
					if (size == (size_t)-1 || size > 0xff) {
						return;
					}
					SCVAL(q, 0, size);
					q += (size + 1);

					/* Unk1 */
					if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 2) {
						return;
					}

					SCVAL(q, 0, 0);
					q++;

					/* NETBIOS of hostname */
					size = push_ascii(&q[1], my_name,
							sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
							0);
					if (size == (size_t)-1 || size > 0xff) {
						return;
					}
					SCVAL(q, 0, size);
					q += (size + 1);

					/* Unk2 */
					if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
						return;
					}

					SCVAL(q, 0, 0);
					q++;

					/* User name */
					if (SVAL(uniuser, 0) != 0) {
						size = push_ascii(&q[1], ascuser,
							sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
							0);
						if (size == (size_t)-1 || size > 0xff) {
							return;
						}
						SCVAL(q, 0, size);
						q += (size + 1);
					}

					q_orig = q;
					/* Site name */
					if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
						return;
					}
					size = push_ascii(&q[1], "Default-First-Site-Name",
							sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
							0);
					if (size == (size_t)-1 || size > 0xff) {
						return;
					}
					SCVAL(q, 0, size);
					q += (size + 1);

					if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 18) {
						return;
					}

					/* Site name (2) */
					str_offset = q - q_orig;
					SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
					SCVAL(q, 1, str_offset & 0xFF);
					q += 2;

					SCVAL(q, 0, PTR_DIFF(q,q1));
					SCVAL(q, 1, 0x10); /* unknown */

					SIVAL(q, 0, 0x00000002);
					q += 4; /* unknown */
					SIVAL(q, 0, ntohl(ip.s_addr));
					q += 4;
					SIVAL(q, 0, 0x00000000);
					q += 4; /* unknown */
					SIVAL(q, 0, 0x00000000);
					q += 4; /* unknown */
				}
#endif

				if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
					return;
				}

				/* tell the client what version we are */
				SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13); 
				/* our ntversion */
				SSVAL(q, 4, 0xffff); /* our lmnttoken */
				SSVAL(q, 6, 0xffff); /* our lm20token */
				q += 8;

				dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));

				pull_ascii_fstring(getdc_str, getdc);
				pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
				source_addr = SMB_STRDUP(inet_ntoa(dgram->header.source_ip));
				if (source_addr == NULL) {
					DEBUG(3, ("out of memory copying client"
						  " address string\n"));
					return;
				}

				/*
				 * handle delay.
				 * packets requeued after delay are marked as
				 * locked.
				 */
				if ((p->locked == False) &&
				    (strlen(ascuser) == 0) &&
				    delay_logon(source_name, source_addr))
				{
					struct timeval when;

					DEBUG(3, ("process_logon_packet: "
						  "delaying initial logon "
						  "reply for client %s(%s) for "
						  "%u milliseconds\n",
						  source_name, source_addr,
						  lp_init_logon_delay()));

					when = timeval_current_ofs(0,
						lp_init_logon_delay() * 1000);
					p->locked = true;
					event_add_timed(nmbd_event_context(),
							NULL,
							when,
							delayed_init_logon_handler,
							p);
				} else {
					DEBUG(3, ("process_logon_packet: "
						  "processing delayed initial "
						  "logon reply for client "
						  "%s(%s)\n",
						  source_name, source_addr));

					p->locked = false;
					send_mailslot(true, getdc,
						outbuf,PTR_DIFF(q,outbuf),
						global_myname(), 0x0,
						source_name,
						dgram->source_name.name_type,
						p->ip, ip, p->port);
				}

				SAFE_FREE(source_addr);

				break;
			}

		/* Announce change to UAS or SAM.  Send by the domain controller when a
		replication event is required. */

		case NETLOGON_ANNOUNCE_UAS:
			DEBUG(5, ("Got NETLOGON_ANNOUNCE_UAS\n"));
			break;

		default:
			DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
			return;
	}
}