1/*
2   Unix SMB/CIFS implementation.
3   NBT netbios routines and daemon - version 2
4   Copyright (C) Andrew Tridgell 1994-1998
5   Copyright (C) Luke Kenneth Casson Leighton 1994-1998
6   Copyright (C) Jeremy Allison 1994-2003
7   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
8
9   This program is free software; you can redistribute it and/or modify
10   it under the terms of the GNU General Public License as published by
11   the Free Software Foundation; either version 2 of the License, or
12   (at your option) any later version.
13
14   This program is distributed in the hope that it will be useful,
15   but WITHOUT ANY WARRANTY; without even the implied warranty of
16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17   GNU General Public License for more details.
18
19   You should have received a copy of the GNU General Public License
20   along with this program; if not, write to the Free Software
21   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22
23   Revision History:
24
25*/
26
27#include "includes.h"
28
29struct sam_database_info {
30        uint32 index;
31        uint32 serial_lo, serial_hi;
32        uint32 date_lo, date_hi;
33};
34
35/****************************************************************************
36Send a message to smbd to do a sam delta sync
37**************************************************************************/
38
39static void send_repl_message(uint32 low_serial)
40{
41        TDB_CONTEXT *tdb;
42
43        tdb = tdb_open_log(lock_path("connections.tdb"), 0,
44                           TDB_DEFAULT, O_RDONLY, 0);
45
46        if (!tdb) {
47                DEBUG(3, ("send_repl_message(): failed to open connections "
48                          "database\n"));
49                return;
50        }
51
52        DEBUG(3, ("sending replication message, serial = 0x%04x\n",
53                  low_serial));
54
55        message_send_all(tdb, MSG_SMB_SAM_REPL, &low_serial,
56                         sizeof(low_serial), False, NULL);
57
58        tdb_close(tdb);
59}
60
61/****************************************************************************
62Process a domain logon packet
63**************************************************************************/
64
65void process_logon_packet(struct packet_struct *p, char *buf,int len,
66                          const char *mailslot)
67{
68	struct dgram_packet *dgram = &p->packet.dgram;
69	pstring my_name;
70	fstring reply_name;
71	pstring outbuf;
72	int code;
73	uint16 token = 0;
74	uint32 ntversion = 0;
75	uint16 lmnttoken = 0;
76	uint16 lm20token = 0;
77	uint32 domainsidsize;
78	BOOL short_request = False;
79	char *getdc;
80	char *uniuser; /* Unicode user name. */
81	pstring ascuser;
82	char *unicomp; /* Unicode computer name. */
83
84	memset(outbuf, 0, sizeof(outbuf));
85
86	if (!lp_domain_logons()) {
87		DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
88logons are not enabled.\n", inet_ntoa(p->ip) ));
89		return;
90	}
91
92	pstrcpy(my_name, global_myname());
93
94	code = SVAL(buf,0);
95	DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
96
97	switch (code) {
98		case 0:
99			{
100				fstring mach_str, user_str, getdc_str;
101				char *q = buf + 2;
102				char *machine = q;
103				char *user = skip_string(machine,1);
104
105				getdc = skip_string(user,1);
106				q = skip_string(getdc,1);
107				token = SVAL(q,3);
108
109				fstrcpy(reply_name,my_name);
110
111				pull_ascii_fstring(mach_str, machine);
112				pull_ascii_fstring(user_str, user);
113				pull_ascii_fstring(getdc_str, getdc);
114
115				DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
116					mach_str,inet_ntoa(p->ip),user_str,token));
117
118				q = outbuf;
119				SSVAL(q, 0, 6);
120				q += 2;
121
122				fstrcpy(reply_name, "\\\\");
123				fstrcat(reply_name, my_name);
124				push_ascii_fstring(q, reply_name);
125				q = skip_string(q, 1); /* PDC name */
126
127				SSVAL(q, 0, token);
128				q += 2;
129
130				dump_data(4, outbuf, PTR_DIFF(q, outbuf));
131
132				send_mailslot(True, getdc_str,
133						outbuf,PTR_DIFF(q,outbuf),
134						global_myname(), 0x0,
135						mach_str,
136						dgram->source_name.name_type,
137						p->ip, *iface_ip(p->ip), p->port);
138				break;
139			}
140
141		case QUERYFORPDC:
142			{
143				fstring mach_str, getdc_str;
144				nstring source_name;
145				char *q = buf + 2;
146				char *machine = q;
147
148				if (!lp_domain_master()) {
149					/* We're not Primary Domain Controller -- ignore this */
150					return;
151				}
152
153				getdc = skip_string(machine,1);
154				q = skip_string(getdc,1);
155				q = ALIGN2(q, buf);
156
157				/* At this point we can work out if this is a W9X or NT style
158				   request. Experiments show that the difference is wether the
159				   packet ends here. For a W9X request we now end with a pair of
160				   bytes (usually 0xFE 0xFF) whereas with NT we have two further
161				   strings - the following is a simple way of detecting this */
162
163				if (len - PTR_DIFF(q, buf) <= 3) {
164					short_request = True;
165				} else {
166					unicomp = q;
167
168					/* A full length (NT style) request */
169					q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
170
171					if (len - PTR_DIFF(q, buf) > 8) {
172						/* with NT5 clients we can sometimes
173							get additional data - a length specificed string
174							containing the domain name, then 16 bytes of
175							data (no idea what it is) */
176						int dom_len = CVAL(q, 0);
177						q++;
178						if (dom_len != 0) {
179							q += dom_len + 1;
180						}
181						q += 16;
182					}
183					ntversion = IVAL(q, 0);
184					lmnttoken = SVAL(q, 4);
185					lm20token = SVAL(q, 6);
186				}
187
188				/* Construct reply. */
189				q = outbuf;
190				SSVAL(q, 0, QUERYFORPDC_R);
191				q += 2;
192
193				fstrcpy(reply_name,my_name);
194				push_ascii_fstring(q, reply_name);
195				q = skip_string(q, 1); /* PDC name */
196
197				/* PDC and domain name */
198				if (!short_request) {
199					/* Make a full reply */
200					q = ALIGN2(q, outbuf);
201
202					q += dos_PutUniCode(q, my_name, sizeof(pstring), True); /* PDC name */
203					q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True); /* Domain name*/
204					SIVAL(q, 0, 1); /* our nt version */
205					SSVAL(q, 4, 0xffff); /* our lmnttoken */
206					SSVAL(q, 6, 0xffff); /* our lm20token */
207					q += 8;
208				}
209
210				/* RJS, 21-Feb-2000, we send a short reply if the request was short */
211
212				pull_ascii_fstring(mach_str, machine);
213
214				DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, \
215reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
216					mach_str,inet_ntoa(p->ip), reply_name, lp_workgroup(),
217					QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
218					(uint32)lm20token ));
219
220				dump_data(4, outbuf, PTR_DIFF(q, outbuf));
221
222				pull_ascii_fstring(getdc_str, getdc);
223				pull_ascii_nstring(source_name, dgram->source_name.name);
224
225				send_mailslot(True, getdc_str,
226					outbuf,PTR_DIFF(q,outbuf),
227					global_myname(), 0x0,
228					source_name,
229					dgram->source_name.name_type,
230					p->ip, *iface_ip(p->ip), p->port);
231				return;
232			}
233
234		case SAMLOGON:
235
236			{
237				fstring getdc_str;
238				nstring source_name;
239				char *q = buf + 2;
240				fstring asccomp;
241
242				q += 2;
243				unicomp = q;
244				uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
245				getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
246				q = skip_string(getdc,1);
247				q += 4; /* Account Control Bits - indicating username type */
248				domainsidsize = IVAL(q, 0);
249				q += 4;
250
251				DEBUG(5,("process_logon_packet: SAMLOGON sidsize %d, len = %d\n", domainsidsize, len));
252
253				if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
254					q += domainsidsize;
255					q = ALIGN4(q, buf);
256				}
257
258				DEBUG(5,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %ld\n", len, (unsigned long)PTR_DIFF(q, buf) ));
259
260				if (len - PTR_DIFF(q, buf) > 8) {
261					/* with NT5 clients we can sometimes
262						get additional data - a length specificed string
263						containing the domain name, then 16 bytes of
264						data (no idea what it is) */
265					int dom_len = CVAL(q, 0);
266					q++;
267					if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
268						q += dom_len + 1;
269					}
270					q += 16;
271				}
272
273				ntversion = IVAL(q, 0);
274				lmnttoken = SVAL(q, 4);
275				lm20token = SVAL(q, 6);
276				q += 8;
277
278				DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
279
280				/*
281				 * we respond regadless of whether the machine is in our password
282				 * database. If it isn't then we let smbd send an appropriate error.
283				 * Let's ignore the SID.
284				 */
285				pull_ucs2_pstring(ascuser, uniuser);
286				pull_ucs2_fstring(asccomp, unicomp);
287				DEBUG(5,("process_logon_packet: SAMLOGON user %s\n", ascuser));
288
289				fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
290				fstrcat(reply_name, my_name);
291
292				DEBUG(5,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
293					asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
294				SAMLOGON_R ,lmnttoken));
295
296				/* Construct reply. */
297
298				q = outbuf;
299				/* we want the simple version unless we are an ADS PDC..which means  */
300				/* never, at least for now */
301				if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
302					if (SVAL(uniuser, 0) == 0) {
303						SSVAL(q, 0, SAMLOGON_UNK_R);	/* user unknown */
304					} else {
305						SSVAL(q, 0, SAMLOGON_R);
306					}
307
308					q += 2;
309
310					q += dos_PutUniCode(q, reply_name,sizeof(pstring), True);
311					q += dos_PutUniCode(q, ascuser, sizeof(pstring), True);
312					q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True);
313				}
314#ifdef HAVE_ADS
315				else {
316					GUID domain_guid;
317					pstring domain;
318					pstring hostname;
319					char *component, *dc, *q1;
320					uint8 size;
321					char *q_orig = q;
322					int str_offset;
323
324					get_mydomname(domain);
325					get_myname(hostname);
326
327					if (SVAL(uniuser, 0) == 0) {
328						SIVAL(q, 0, SAMLOGON_AD_UNK_R);	/* user unknown */
329					} else {
330						SIVAL(q, 0, SAMLOGON_AD_R);
331					}
332					q += 4;
333
334					SIVAL(q, 0, ADS_PDC|ADS_GC|ADS_LDAP|ADS_DS|
335						ADS_KDC|ADS_TIMESERV|ADS_CLOSEST|ADS_WRITABLE);
336					q += 4;
337
338					/* Push Domain GUID */
339					if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
340						DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
341						return;
342					}
343					memcpy(q, &domain_guid, sizeof(domain_guid));
344					q += sizeof(domain_guid);
345
346					/* Forest */
347					str_offset = q - q_orig;
348					dc = domain;
349					q1 = q;
350					while ((component = strtok(dc, "."))) {
351						dc = NULL;
352						size = push_ascii(&q[1], component, -1, 0);
353						SCVAL(q, 0, size);
354						q += (size + 1);
355					}
356
357					/* Unk0 */
358					SCVAL(q, 0, 0);
359					q++;
360
361					/* Domain */
362					SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
363					SCVAL(q, 1, str_offset & 0xFF);
364					q += 2;
365
366					/* Hostname */
367					size = push_ascii(&q[1], hostname, -1, 0);
368					SCVAL(q, 0, size);
369					q += (size + 1);
370					SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
371					SCVAL(q, 1, str_offset & 0xFF);
372					q += 2;
373
374					/* NETBIOS of domain */
375					size = push_ascii(&q[1], lp_workgroup(), -1, STR_UPPER);
376					SCVAL(q, 0, size);
377					q += (size + 1);
378
379					/* Unk1 */
380					SCVAL(q, 0, 0);
381					q++;
382
383					/* NETBIOS of hostname */
384					size = push_ascii(&q[1], my_name, -1, 0);
385					SCVAL(q, 0, size);
386					q += (size + 1);
387
388					/* Unk2 */
389					SCVAL(q, 0, 0);
390					q++;
391
392					/* User name */
393					if (SVAL(uniuser, 0) != 0) {
394						size = push_ascii(&q[1], ascuser, -1, 0);
395						SCVAL(q, 0, size);
396						q += (size + 1);
397					}
398
399					q_orig = q;
400					/* Site name */
401					size = push_ascii(&q[1], "Default-First-Site-Name", -1, 0);
402					SCVAL(q, 0, size);
403					q += (size + 1);
404
405					/* Site name (2) */
406					str_offset = q - q_orig;
407					SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
408					SCVAL(q, 1, str_offset & 0xFF);
409					q += 2;
410
411					SCVAL(q, 0, PTR_DIFF(q,q1));
412					SCVAL(q, 1, 0x10); /* unknown */
413
414					SIVAL(q, 0, 0x00000002);
415					q += 4; /* unknown */
416					SIVAL(q, 0, (iface_ip(p->ip))->s_addr);
417					q += 4;
418					SIVAL(q, 0, 0x00000000);
419					q += 4; /* unknown */
420					SIVAL(q, 0, 0x00000000);
421					q += 4; /* unknown */
422				}
423#endif
424
425				/* tell the client what version we are */
426				SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
427				/* our ntversion */
428				SSVAL(q, 4, 0xffff); /* our lmnttoken */
429				SSVAL(q, 6, 0xffff); /* our lm20token */
430				q += 8;
431
432				dump_data(4, outbuf, PTR_DIFF(q, outbuf));
433
434				pull_ascii_fstring(getdc_str, getdc);
435				pull_ascii_nstring(source_name, dgram->source_name.name);
436
437				send_mailslot(True, getdc,
438					outbuf,PTR_DIFF(q,outbuf),
439					global_myname(), 0x0,
440					dgram->source_name.name,
441					dgram->source_name.name_type,
442					p->ip, *iface_ip(p->ip), p->port);
443				break;
444			}
445
446		/* Announce change to UAS or SAM.  Send by the domain controller when a
447		replication event is required. */
448
449		case SAM_UAS_CHANGE:
450			{
451				struct sam_database_info *db_info;
452				char *q = buf + 2;
453				int i, db_count;
454				uint32 low_serial;
455
456				/* Header */
457
458				low_serial = IVAL(q, 0); q += 4;     /* Low serial number */
459
460				q += 4;                   /* Date/time */
461				q += 4;                   /* Pulse */
462				q += 4;                   /* Random */
463
464				/* Domain info */
465
466				q = skip_string(q, 1);    /* PDC name */
467				q = skip_string(q, 1);    /* Domain name */
468				q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode PDC name */
469				q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode domain name */
470
471				/* Database info */
472
473				db_count = SVAL(q, 0); q += 2;
474
475				db_info = (struct sam_database_info *)
476						malloc(sizeof(struct sam_database_info) * db_count);
477
478				if (db_info == NULL) {
479					DEBUG(3, ("out of memory allocating info for %d databases\n", db_count));
480					return;
481				}
482
483				for (i = 0; i < db_count; i++) {
484					db_info[i].index = IVAL(q, 0);
485					db_info[i].serial_lo = IVAL(q, 4);
486					db_info[i].serial_hi = IVAL(q, 8);
487					db_info[i].date_lo = IVAL(q, 12);
488					db_info[i].date_hi = IVAL(q, 16);
489					q += 20;
490				}
491
492				/* Domain SID */
493
494#if 0
495				/* We must range check this. */
496				q += IVAL(q, 0) + 4;  /* 4 byte length plus data */
497
498				q += 2;               /* Alignment? */
499
500				/* Misc other info */
501
502				q += 4;               /* NT version (0x1) */
503				q += 2;               /* LMNT token (0xff) */
504				q += 2;               /* LM20 token (0xff) */
505#endif
506
507				SAFE_FREE(db_info);        /* Not sure whether we need to do anything useful with these */
508
509				/* Send message to smbd */
510
511				send_repl_message(low_serial);
512				break;
513			}
514
515		default:
516			DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
517			return;
518	}
519}
520