source: trunk-3.0/source/nmbd/nmbd_processlogon.c@ 101

Last change on this file since 101 was 26, checked in by Paul Smedley, 18 years ago

Updated source to 3.0.25rc1
File size: 17.1 KB
Line 
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 = get_safe_SVAL(buf,len,buf,0,-1);
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(buf,len,machine);
104
105 if (!user || PTR_DIFF(user, buf) >= len) {
106 DEBUG(0,("process_logon_packet: bad packet\n"));
107 return;
108 }
109 getdc = skip_string(buf,len,user);
110
111 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
112 DEBUG(0,("process_logon_packet: bad packet\n"));
113 return;
114 }
115 q = skip_string(buf,len,getdc);
116
117 if (!q || PTR_DIFF(q + 5, buf) > len) {
118 DEBUG(0,("process_logon_packet: bad packet\n"));
119 return;
120 }
121 token = SVAL(q,3);
122
123 fstrcpy(reply_name,my_name);
124
125 pull_ascii_fstring(mach_str, machine);
126 pull_ascii_fstring(user_str, user);
127 pull_ascii_fstring(getdc_str, getdc);
128
129 DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
130 mach_str,inet_ntoa(p->ip),user_str,token));
131
132 q = outbuf;
133 SSVAL(q, 0, 6);
134 q += 2;
135
136 fstrcpy(reply_name, "\\\\");
137 fstrcat(reply_name, my_name);
138 push_ascii_fstring(q, reply_name);
139 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
140
141 SSVAL(q, 0, token);
142 q += 2;
143
144 dump_data(4, outbuf, PTR_DIFF(q, outbuf));
145
146 send_mailslot(True, getdc_str,
147 outbuf,PTR_DIFF(q,outbuf),
148 global_myname(), 0x0,
149 mach_str,
150 dgram->source_name.name_type,
151 p->ip, *iface_ip(p->ip), p->port);
152 break;
153 }
154
155 case QUERYFORPDC:
156 {
157 fstring mach_str, getdc_str;
158 fstring source_name;
159 char *q = buf + 2;
160 char *machine = q;
161
162 if (!lp_domain_master()) {
163 /* We're not Primary Domain Controller -- ignore this */
164 return;
165 }
166
167 getdc = skip_string(buf,len,machine);
168
169 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
170 DEBUG(0,("process_logon_packet: bad packet\n"));
171 return;
172 }
173 q = skip_string(buf,len,getdc);
174
175 if (!q || PTR_DIFF(q, buf) >= len) {
176 DEBUG(0,("process_logon_packet: bad packet\n"));
177 return;
178 }
179 q = ALIGN2(q, buf);
180
181 /* At this point we can work out if this is a W9X or NT style
182 request. Experiments show that the difference is wether the
183 packet ends here. For a W9X request we now end with a pair of
184 bytes (usually 0xFE 0xFF) whereas with NT we have two further
185 strings - the following is a simple way of detecting this */
186
187 if (len - PTR_DIFF(q, buf) <= 3) {
188 short_request = True;
189 } else {
190 unicomp = q;
191
192 if (PTR_DIFF(q, buf) >= len) {
193 DEBUG(0,("process_logon_packet: bad packet\n"));
194 return;
195 }
196
197 /* A full length (NT style) request */
198 q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
199
200 if (PTR_DIFF(q, buf) >= len) {
201 DEBUG(0,("process_logon_packet: bad packet\n"));
202 return;
203 }
204
205 if (len - PTR_DIFF(q, buf) > 8) {
206 /* with NT5 clients we can sometimes
207 get additional data - a length specificed string
208 containing the domain name, then 16 bytes of
209 data (no idea what it is) */
210 int dom_len = CVAL(q, 0);
211 q++;
212 if (dom_len != 0) {
213 q += dom_len + 1;
214 }
215 q += 16;
216 }
217
218 if (PTR_DIFF(q + 8, buf) > len) {
219 DEBUG(0,("process_logon_packet: bad packet\n"));
220 return;
221 }
222
223 ntversion = IVAL(q, 0);
224 lmnttoken = SVAL(q, 4);
225 lm20token = SVAL(q, 6);
226 }
227
228 /* Construct reply. */
229 q = outbuf;
230 SSVAL(q, 0, QUERYFORPDC_R);
231 q += 2;
232
233 fstrcpy(reply_name,my_name);
234 push_ascii_fstring(q, reply_name);
235 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
236
237 /* PDC and domain name */
238 if (!short_request) {
239 /* Make a full reply */
240 q = ALIGN2(q, outbuf);
241
242 q += dos_PutUniCode(q, my_name, sizeof(pstring), True); /* PDC name */
243 q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True); /* Domain name*/
244 SIVAL(q, 0, 1); /* our nt version */
245 SSVAL(q, 4, 0xffff); /* our lmnttoken */
246 SSVAL(q, 6, 0xffff); /* our lm20token */
247 q += 8;
248 }
249
250 /* RJS, 21-Feb-2000, we send a short reply if the request was short */
251
252 pull_ascii_fstring(mach_str, machine);
253
254 DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, \
255reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
256 mach_str,inet_ntoa(p->ip), reply_name, lp_workgroup(),
257 QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
258 (uint32)lm20token ));
259
260 dump_data(4, outbuf, PTR_DIFF(q, outbuf));
261
262 pull_ascii_fstring(getdc_str, getdc);
263 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
264
265 send_mailslot(True, getdc_str,
266 outbuf,PTR_DIFF(q,outbuf),
267 global_myname(), 0x0,
268 source_name,
269 dgram->source_name.name_type,
270 p->ip, *iface_ip(p->ip), p->port);
271 return;
272 }
273
274 case SAMLOGON:
275
276 {
277 fstring getdc_str;
278 fstring source_name;
279 char *q = buf + 2;
280 fstring asccomp;
281
282 q += 2;
283
284 if (PTR_DIFF(q, buf) >= len) {
285 DEBUG(0,("process_logon_packet: bad packet\n"));
286 return;
287 }
288
289 unicomp = q;
290 uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
291
292 if (PTR_DIFF(uniuser, buf) >= len) {
293 DEBUG(0,("process_logon_packet: bad packet\n"));
294 return;
295 }
296
297 getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
298
299 if (PTR_DIFF(getdc, buf) >= len) {
300 DEBUG(0,("process_logon_packet: bad packet\n"));
301 return;
302 }
303
304 q = skip_string(buf,len,getdc);
305
306 if (!q || PTR_DIFF(q + 8, buf) >= len) {
307 DEBUG(0,("process_logon_packet: bad packet\n"));
308 return;
309 }
310
311 q += 4; /* Account Control Bits - indicating username type */
312 domainsidsize = IVAL(q, 0);
313 q += 4;
314
315 DEBUG(5,("process_logon_packet: SAMLOGON sidsize %d, len = %d\n", domainsidsize, len));
316
317 if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
318 q += domainsidsize;
319 q = ALIGN4(q, buf);
320 }
321
322 DEBUG(5,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %ld\n", len, (unsigned long)PTR_DIFF(q, buf) ));
323
324 if (len - PTR_DIFF(q, buf) > 8) {
325 /* with NT5 clients we can sometimes
326 get additional data - a length specificed string
327 containing the domain name, then 16 bytes of
328 data (no idea what it is) */
329 int dom_len = CVAL(q, 0);
330 q++;
331 if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
332 q += dom_len + 1;
333 }
334 q += 16;
335 }
336
337 if (PTR_DIFF(q + 8, buf) > len) {
338 DEBUG(0,("process_logon_packet: bad packet\n"));
339 return;
340 }
341
342 ntversion = IVAL(q, 0);
343 lmnttoken = SVAL(q, 4);
344 lm20token = SVAL(q, 6);
345 q += 8;
346
347 DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
348
349 /*
350 * we respond regadless of whether the machine is in our password
351 * database. If it isn't then we let smbd send an appropriate error.
352 * Let's ignore the SID.
353 */
354 pull_ucs2_pstring(ascuser, uniuser);
355 pull_ucs2_fstring(asccomp, unicomp);
356 DEBUG(5,("process_logon_packet: SAMLOGON user %s\n", ascuser));
357
358 fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
359 fstrcat(reply_name, my_name);
360
361 DEBUG(5,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
362 asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
363 SAMLOGON_R ,lmnttoken));
364
365 /* Construct reply. */
366
367 q = outbuf;
368 /* we want the simple version unless we are an ADS PDC..which means */
369 /* never, at least for now */
370 if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
371 if (SVAL(uniuser, 0) == 0) {
372 SSVAL(q, 0, SAMLOGON_UNK_R); /* user unknown */
373 } else {
374 SSVAL(q, 0, SAMLOGON_R);
375 }
376
377 q += 2;
378
379 q += dos_PutUniCode(q, reply_name,sizeof(pstring), True);
380 q += dos_PutUniCode(q, ascuser, sizeof(pstring), True);
381 q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True);
382 }
383#ifdef HAVE_ADS
384 else {
385 struct GUID domain_guid;
386 UUID_FLAT flat_guid;
387 pstring domain;
388 pstring hostname;
389 char *component, *dc, *q1;
390 uint8 size;
391 char *q_orig = q;
392 int str_offset;
393
394 get_mydnsdomname(domain);
395 get_myname(hostname);
396
397 if (SVAL(uniuser, 0) == 0) {
398 SIVAL(q, 0, SAMLOGON_AD_UNK_R); /* user unknown */
399 } else {
400 SIVAL(q, 0, SAMLOGON_AD_R);
401 }
402 q += 4;
403
404 SIVAL(q, 0, ADS_PDC|ADS_GC|ADS_LDAP|ADS_DS|
405 ADS_KDC|ADS_TIMESERV|ADS_CLOSEST|ADS_WRITABLE);
406 q += 4;
407
408 /* Push Domain GUID */
409 if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
410 DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
411 return;
412 }
413
414 smb_uuid_pack(domain_guid, &flat_guid);
415 memcpy(q, &flat_guid.info, UUID_FLAT_SIZE);
416 q += UUID_FLAT_SIZE;
417
418 /* Forest */
419 str_offset = q - q_orig;
420 dc = domain;
421 q1 = q;
422 while ((component = strtok(dc, "."))) {
423 dc = NULL;
424 size = push_ascii(&q[1], component, -1, 0);
425 SCVAL(q, 0, size);
426 q += (size + 1);
427 }
428
429 /* Unk0 */
430 SCVAL(q, 0, 0);
431 q++;
432
433 /* Domain */
434 SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
435 SCVAL(q, 1, str_offset & 0xFF);
436 q += 2;
437
438 /* Hostname */
439 size = push_ascii(&q[1], hostname, -1, 0);
440 SCVAL(q, 0, size);
441 q += (size + 1);
442 SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
443 SCVAL(q, 1, str_offset & 0xFF);
444 q += 2;
445
446 /* NETBIOS of domain */
447 size = push_ascii(&q[1], lp_workgroup(), -1, STR_UPPER);
448 SCVAL(q, 0, size);
449 q += (size + 1);
450
451 /* Unk1 */
452 SCVAL(q, 0, 0);
453 q++;
454
455 /* NETBIOS of hostname */
456 size = push_ascii(&q[1], my_name, -1, 0);
457 SCVAL(q, 0, size);
458 q += (size + 1);
459
460 /* Unk2 */
461 SCVAL(q, 0, 0);
462 q++;
463
464 /* User name */
465 if (SVAL(uniuser, 0) != 0) {
466 size = push_ascii(&q[1], ascuser, -1, 0);
467 SCVAL(q, 0, size);
468 q += (size + 1);
469 }
470
471 q_orig = q;
472 /* Site name */
473 size = push_ascii(&q[1], "Default-First-Site-Name", -1, 0);
474 SCVAL(q, 0, size);
475 q += (size + 1);
476
477 /* Site name (2) */
478 str_offset = q - q_orig;
479 SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
480 SCVAL(q, 1, str_offset & 0xFF);
481 q += 2;
482
483 SCVAL(q, 0, PTR_DIFF(q,q1));
484 SCVAL(q, 1, 0x10); /* unknown */
485
486 SIVAL(q, 0, 0x00000002);
487 q += 4; /* unknown */
488 SIVAL(q, 0, (iface_ip(p->ip))->s_addr);
489 q += 4;
490 SIVAL(q, 0, 0x00000000);
491 q += 4; /* unknown */
492 SIVAL(q, 0, 0x00000000);
493 q += 4; /* unknown */
494 }
495#endif
496
497 /* tell the client what version we are */
498 SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
499 /* our ntversion */
500 SSVAL(q, 4, 0xffff); /* our lmnttoken */
501 SSVAL(q, 6, 0xffff); /* our lm20token */
502 q += 8;
503
504 dump_data(4, outbuf, PTR_DIFF(q, outbuf));
505
506 pull_ascii_fstring(getdc_str, getdc);
507 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
508
509 send_mailslot(True, getdc,
510 outbuf,PTR_DIFF(q,outbuf),
511 global_myname(), 0x0,
512 source_name,
513 dgram->source_name.name_type,
514 p->ip, *iface_ip(p->ip), p->port);
515 break;
516 }
517
518 /* Announce change to UAS or SAM. Send by the domain controller when a
519 replication event is required. */
520
521 case SAM_UAS_CHANGE:
522 {
523 struct sam_database_info *db_info;
524 char *q = buf + 2;
525 int i, db_count;
526 uint32 low_serial;
527
528 /* Header */
529
530 if (PTR_DIFF(q + 16, buf) >= len) {
531 DEBUG(0,("process_logon_packet: bad packet\n"));
532 return;
533 }
534
535 low_serial = IVAL(q, 0); q += 4; /* Low serial number */
536
537 q += 4; /* Date/time */
538 q += 4; /* Pulse */
539 q += 4; /* Random */
540
541 /* Domain info */
542
543 q = skip_string(buf,len,q); /* PDC name */
544
545 if (!q || PTR_DIFF(q, buf) >= len) {
546 DEBUG(0,("process_logon_packet: bad packet\n"));
547 return;
548 }
549
550 q = skip_string(buf,len,q); /* Domain name */
551
552 if (!q || PTR_DIFF(q, buf) >= len) {
553 DEBUG(0,("process_logon_packet: bad packet\n"));
554 return;
555 }
556
557 q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode PDC name */
558
559 if (PTR_DIFF(q, buf) >= len) {
560 DEBUG(0,("process_logon_packet: bad packet\n"));
561 return;
562 }
563
564 q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode domain name */
565
566 /* Database info */
567
568 if (PTR_DIFF(q + 2, buf) >= len) {
569 DEBUG(0,("process_logon_packet: bad packet\n"));
570 return;
571 }
572
573 db_count = SVAL(q, 0); q += 2;
574
575 if (PTR_DIFF(q + (db_count*20), buf) >= len) {
576 DEBUG(0,("process_logon_packet: bad packet\n"));
577 return;
578 }
579
580 db_info = SMB_MALLOC_ARRAY(struct sam_database_info, db_count);
581
582 if (db_info == NULL) {
583 DEBUG(3, ("out of memory allocating info for %d databases\n", db_count));
584 return;
585 }
586
587 for (i = 0; i < db_count; i++) {
588 db_info[i].index = IVAL(q, 0);
589 db_info[i].serial_lo = IVAL(q, 4);
590 db_info[i].serial_hi = IVAL(q, 8);
591 db_info[i].date_lo = IVAL(q, 12);
592 db_info[i].date_hi = IVAL(q, 16);
593 q += 20;
594 }
595
596 /* Domain SID */
597
598#if 0
599 /* We must range check this. */
600 q += IVAL(q, 0) + 4; /* 4 byte length plus data */
601
602 q += 2; /* Alignment? */
603
604 /* Misc other info */
605
606 q += 4; /* NT version (0x1) */
607 q += 2; /* LMNT token (0xff) */
608 q += 2; /* LM20 token (0xff) */
609#endif
610
611 SAFE_FREE(db_info); /* Not sure whether we need to do anything useful with these */
612
613 /* Send message to smbd */
614
615 send_repl_message(low_serial);
616 break;
617 }
618
619 default:
620 DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
621 return;
622 }
623}
Note: See TracBrowser for help on using the repository browser.