Modified fix for bugid #784. Based on a patch from moriyama@miraclelinux.com (MORIYAM...
[samba.git] / source3 / nmbd / nmbd_processlogon.c
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
29 struct sam_database_info {
30         uint32 index;
31         uint32 serial_lo, serial_hi;
32         uint32 date_lo, date_hi;
33 };
34
35 /****************************************************************************
36 Send a message to smbd to do a sam delta sync
37 **************************************************************************/
38
39 static 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 /****************************************************************************
62 Process a domain logon packet
63 **************************************************************************/
64
65 void 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 \
88 logons 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                                 fstring 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, \
215 reporting %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, sizeof(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                                         struct uuid domain_guid;
317                                         UUID_FLAT flat_guid;
318                                         pstring domain;
319                                         pstring hostname;
320                                         char *component, *dc, *q1;
321                                         uint8 size;
322                                         char *q_orig = q;
323                                         int str_offset;
324
325                                         get_mydnsdomname(domain);
326                                         get_myname(hostname);
327         
328                                         if (SVAL(uniuser, 0) == 0) {
329                                                 SIVAL(q, 0, SAMLOGON_AD_UNK_R); /* user unknown */
330                                         } else {
331                                                 SIVAL(q, 0, SAMLOGON_AD_R);
332                                         }
333                                         q += 4;
334
335                                         SIVAL(q, 0, ADS_PDC|ADS_GC|ADS_LDAP|ADS_DS|
336                                                 ADS_KDC|ADS_TIMESERV|ADS_CLOSEST|ADS_WRITABLE);
337                                         q += 4;
338
339                                         /* Push Domain GUID */
340                                         if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
341                                                 DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
342                                                 return;
343                                         }
344
345                                         smb_uuid_pack(domain_guid, &flat_guid);
346                                         memcpy(q, &flat_guid.info, UUID_FLAT_SIZE);
347                                         q += UUID_FLAT_SIZE;
348
349                                         /* Forest */
350                                         str_offset = q - q_orig;
351                                         dc = domain;
352                                         q1 = q;
353                                         while ((component = strtok(dc, "."))) {
354                                                 dc = NULL;
355                                                 size = push_ascii(&q[1], component, -1, 0);
356                                                 SCVAL(q, 0, size);
357                                                 q += (size + 1);
358                                         }
359
360                                         /* Unk0 */
361                                         SCVAL(q, 0, 0);
362                                         q++;
363
364                                         /* Domain */
365                                         SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
366                                         SCVAL(q, 1, str_offset & 0xFF);
367                                         q += 2;
368
369                                         /* Hostname */
370                                         size = push_ascii(&q[1], hostname, -1, 0);
371                                         SCVAL(q, 0, size);
372                                         q += (size + 1);
373                                         SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
374                                         SCVAL(q, 1, str_offset & 0xFF);
375                                         q += 2;
376
377                                         /* NETBIOS of domain */
378                                         size = push_ascii(&q[1], lp_workgroup(), -1, STR_UPPER);
379                                         SCVAL(q, 0, size);
380                                         q += (size + 1);
381
382                                         /* Unk1 */
383                                         SCVAL(q, 0, 0);
384                                         q++;
385
386                                         /* NETBIOS of hostname */
387                                         size = push_ascii(&q[1], my_name, -1, 0);
388                                         SCVAL(q, 0, size);
389                                         q += (size + 1);
390
391                                         /* Unk2 */
392                                         SCVAL(q, 0, 0);
393                                         q++;
394
395                                         /* User name */
396                                         if (SVAL(uniuser, 0) != 0) {
397                                                 size = push_ascii(&q[1], ascuser, -1, 0);
398                                                 SCVAL(q, 0, size);
399                                                 q += (size + 1);
400                                         }
401
402                                         q_orig = q;
403                                         /* Site name */
404                                         size = push_ascii(&q[1], "Default-First-Site-Name", -1, 0);
405                                         SCVAL(q, 0, size);
406                                         q += (size + 1);
407
408                                         /* Site name (2) */
409                                         str_offset = q - q_orig;
410                                         SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
411                                         SCVAL(q, 1, str_offset & 0xFF);
412                                         q += 2;
413
414                                         SCVAL(q, 0, PTR_DIFF(q,q1));
415                                         SCVAL(q, 1, 0x10); /* unknown */
416
417                                         SIVAL(q, 0, 0x00000002);
418                                         q += 4; /* unknown */
419                                         SIVAL(q, 0, (iface_ip(p->ip))->s_addr);
420                                         q += 4;
421                                         SIVAL(q, 0, 0x00000000);
422                                         q += 4; /* unknown */
423                                         SIVAL(q, 0, 0x00000000);
424                                         q += 4; /* unknown */
425                                 }       
426 #endif
427
428                                 /* tell the client what version we are */
429                                 SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13); 
430                                 /* our ntversion */
431                                 SSVAL(q, 4, 0xffff); /* our lmnttoken */ 
432                                 SSVAL(q, 6, 0xffff); /* our lm20token */
433                                 q += 8;
434
435                                 dump_data(4, outbuf, PTR_DIFF(q, outbuf));
436
437                                 pull_ascii_fstring(getdc_str, getdc);
438                                 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
439
440                                 send_mailslot(True, getdc,
441                                         outbuf,PTR_DIFF(q,outbuf),
442                                         global_myname(), 0x0,
443                                         dgram->source_name.name,
444                                         dgram->source_name.name_type,
445                                         p->ip, *iface_ip(p->ip), p->port);  
446                                 break;
447                         }
448
449                 /* Announce change to UAS or SAM.  Send by the domain controller when a
450                 replication event is required. */
451
452                 case SAM_UAS_CHANGE:
453                         {
454                                 struct sam_database_info *db_info;
455                                 char *q = buf + 2;
456                                 int i, db_count;
457                                 uint32 low_serial;
458           
459                                 /* Header */
460           
461                                 low_serial = IVAL(q, 0); q += 4;     /* Low serial number */
462
463                                 q += 4;                   /* Date/time */
464                                 q += 4;                   /* Pulse */
465                                 q += 4;                   /* Random */
466           
467                                 /* Domain info */
468           
469                                 q = skip_string(q, 1);    /* PDC name */
470                                 q = skip_string(q, 1);    /* Domain name */
471                                 q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode PDC name */
472                                 q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode domain name */
473           
474                                 /* Database info */
475           
476                                 db_count = SVAL(q, 0); q += 2;
477           
478                                 db_info = (struct sam_database_info *)
479                                                 malloc(sizeof(struct sam_database_info) * db_count);
480
481                                 if (db_info == NULL) {
482                                         DEBUG(3, ("out of memory allocating info for %d databases\n", db_count));
483                                         return;
484                                 }
485           
486                                 for (i = 0; i < db_count; i++) {
487                                         db_info[i].index = IVAL(q, 0);
488                                         db_info[i].serial_lo = IVAL(q, 4);
489                                         db_info[i].serial_hi = IVAL(q, 8);
490                                         db_info[i].date_lo = IVAL(q, 12);
491                                         db_info[i].date_hi = IVAL(q, 16);
492                                         q += 20;
493                                 }
494
495                                 /* Domain SID */
496
497 #if 0
498                                 /* We must range check this. */
499                                 q += IVAL(q, 0) + 4;  /* 4 byte length plus data */
500           
501                                 q += 2;               /* Alignment? */
502
503                                 /* Misc other info */
504
505                                 q += 4;               /* NT version (0x1) */
506                                 q += 2;               /* LMNT token (0xff) */
507                                 q += 2;               /* LM20 token (0xff) */
508 #endif
509
510                                 SAFE_FREE(db_info);        /* Not sure whether we need to do anything useful with these */
511
512                                 /* Send message to smbd */
513
514                                 send_repl_message(low_serial);
515                                 break;
516                         }
517
518                 default:
519                         DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
520                         return;
521         }
522 }