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 3 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, see <http://www.gnu.org/licenses/>.
  21
  22    Revision History:
  23
  24 */
  25
  26 #include "includes.h"
  27 #include "../libcli/netlogon.h"
  28 #include "../libcli/cldap/cldap.h"
  29 #include "../lib/tsocket/tsocket.h"
  30 #include "../libcli/security/dom_sid.h"
  31 #include "secrets.h"
  32
  33 struct sam_database_info {
  34         uint32 index;
  35         uint32 serial_lo, serial_hi;
  36         uint32 date_lo, date_hi;
  37 };
  38
  39 /**
  40  * check whether the client belongs to the hosts
  41  * for which initial logon should be delayed...
  42  */
  43 static bool delay_logon(const char *peer_name, const char *peer_addr)
  44 {
  45         const char **delay_list = lp_init_logon_delayed_hosts();
  46         const char *peer[2];
  47
  48         if (delay_list == NULL) {
  49                 return False;
  50         }
  51
  52         peer[0] = peer_name;
  53         peer[1] = peer_addr;
  54
  55         return list_match(delay_list, (const char *)peer, client_match);
  56 }
  57
  58 static void delayed_init_logon_handler(struct event_context *event_ctx,
  59                                        struct timed_event *te,
  60                                        struct timeval now,
  61                                        void *private_data)
  62 {
  63         struct packet_struct *p = (struct packet_struct *)private_data;
  64
  65         DEBUG(10, ("delayed_init_logon_handler (%lx): re-queuing packet.\n",
  66                    (unsigned long)te));
  67
  68         queue_packet(p);
  69
  70         TALLOC_FREE(te);
  71 }
  72
  73 struct nmbd_proxy_logon_context {
  74         struct cldap_socket *cldap_sock;
  75 };
  76
  77 static struct nmbd_proxy_logon_context *global_nmbd_proxy_logon;
  78
  79 bool initialize_nmbd_proxy_logon(void)
  80 {
  81         const char *cldap_server = lp_parm_const_string(-1, "nmbd_proxy_logon",
  82                                                         "cldap_server", NULL);
  83         struct nmbd_proxy_logon_context *ctx;
  84         NTSTATUS status;
  85         struct in_addr addr;
  86         char addrstr[INET_ADDRSTRLEN];
  87         const char *server_str;
  88         int ret;
  89         struct tsocket_address *server_addr;
  90
  91         if (!cldap_server) {
  92                 return true;
  93         }
  94
  95         addr = interpret_addr2(cldap_server);
  96         server_str = inet_ntop(AF_INET, &addr,
  97                              addrstr, sizeof(addrstr));
  98         if (!server_str || strcmp("0.0.0.0", server_str) == 0) {
  99                 DEBUG(0,("Failed to resolve[%s] for nmbd_proxy_logon\n",
 100                          cldap_server));
 101                 return false;
 102         }
 103
 104         ctx = talloc_zero(nmbd_event_context(),
 105                           struct nmbd_proxy_logon_context);
 106         if (!ctx) {
 107                 return false;
 108         }
 109
 110         ret = tsocket_address_inet_from_strings(ctx, "ipv4",
 111                                                 server_str, LDAP_PORT,
 112                                                 &server_addr);
 113         if (ret != 0) {
 114                 TALLOC_FREE(ctx);
 115                 status = map_nt_error_from_unix(errno);
 116                 DEBUG(0,("Failed to create cldap tsocket_address for %s - %s\n",
 117                          server_str, nt_errstr(status)));
 118                 return false;
 119         }
 120
 121         /* we create a connected udp socket */
 122         status = cldap_socket_init(ctx, nmbd_event_context(), NULL,
 123                                    server_addr, &ctx->cldap_sock);
 124         TALLOC_FREE(server_addr);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 TALLOC_FREE(ctx);
 127                 DEBUG(0,("failed to create cldap socket for %s: %s\n",
 128                         server_str, nt_errstr(status)));
 129                 return false;
 130         }
 131
 132         global_nmbd_proxy_logon = ctx;
 133         return true;
 134 }
 135
 136 struct nmbd_proxy_logon_state {
 137         struct in_addr local_ip;
 138         struct packet_struct *p;
 139         const char *remote_name;
 140         uint8_t remote_name_type;
 141         const char *remote_mailslot;
 142         struct nbt_netlogon_packet req;
 143         struct nbt_netlogon_response resp;
 144         struct cldap_netlogon io;
 145 };
 146
 147 static int nmbd_proxy_logon_state_destructor(struct nmbd_proxy_logon_state *s)
 148 {
 149         s->p->locked = false;
 150         free_packet(s->p);
 151         return 0;
 152 }
 153
 154 static void nmbd_proxy_logon_done(struct tevent_req *subreq);
 155
 156 static void nmbd_proxy_logon(struct nmbd_proxy_logon_context *ctx,
 157                              struct in_addr local_ip,
 158                              struct packet_struct *p,
 159                              uint8_t *buf,
 160                              uint32_t len)
 161 {
 162         struct nmbd_proxy_logon_state *state;
 163         enum ndr_err_code ndr_err;
 164         DATA_BLOB blob = data_blob_const(buf, len);
 165         const char *computer_name = NULL;
 166         const char *mailslot_name = NULL;
 167         const char *user_name = NULL;
 168         const char *domain_sid = NULL;
 169         uint32_t acct_control = 0;
 170         uint32_t nt_version = 0;
 171         struct tevent_req *subreq;
 172         fstring source_name;
 173         struct dgram_packet *dgram = &p->packet.dgram;
 174
 175         state = TALLOC_ZERO_P(ctx, struct nmbd_proxy_logon_state);
 176         if (!state) {
 177                 DEBUG(0,("failed to allocate nmbd_proxy_logon_state\n"));
 178                 return;
 179         }
 180
 181         pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
 182         state->remote_name = talloc_strdup(state, source_name);
 183         state->remote_name_type = dgram->source_name.name_type,
 184         state->local_ip = local_ip;
 185         state->p = p;
 186
 187         ndr_err = ndr_pull_struct_blob(
 188                 &blob, state, &state->req,
 189                 (ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
 190         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 191                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 192                 DEBUG(0,("failed parse nbt_netlogon_packet: %s\n",
 193                         nt_errstr(status)));
 194                 TALLOC_FREE(state);
 195                 return;
 196         }
 197
 198         if (DEBUGLEVEL >= 10) {
 199                 DEBUG(10, ("nmbd_proxy_logon:\n"));
 200                 NDR_PRINT_DEBUG(nbt_netlogon_packet, &state->req);
 201         }
 202
 203         switch (state->req.command) {
 204         case LOGON_SAM_LOGON_REQUEST:
 205                 computer_name   = state->req.req.logon.computer_name;
 206                 user_name       = state->req.req.logon.user_name;
 207                 mailslot_name   = state->req.req.logon.mailslot_name;
 208                 acct_control    = state->req.req.logon.acct_control;
 209                 if (state->req.req.logon.sid_size > 0) {
 210                         domain_sid = dom_sid_string(state,
 211                                                     &state->req.req.logon.sid);
 212                         if (!domain_sid) {
 213                                 DEBUG(0,("failed to get a string for sid\n"));
 214                                 TALLOC_FREE(state);
 215                                 return;
 216                         }
 217                 }
 218                 nt_version      = state->req.req.logon.nt_version;
 219                 break;
 220
 221         default:
 222                 /* this can't happen as the caller already checks the command */
 223                 break;
 224         }
 225
 226         state->remote_mailslot = mailslot_name;
 227
 228         if (user_name && strlen(user_name) == 0) {
 229                 user_name = NULL;
 230         }
 231
 232         if (computer_name && strlen(computer_name) == 0) {
 233                 computer_name = NULL;
 234         }
 235
 236         /*
 237          * as the socket is connected,
 238          * we don't need to specify the destination
 239          */
 240         state->io.in.dest_address       = NULL;
 241         state->io.in.dest_port          = 0;
 242         state->io.in.realm              = NULL;
 243         state->io.in.host               = computer_name;
 244         state->io.in.user               = user_name;
 245         state->io.in.domain_guid        = NULL;
 246         state->io.in.domain_sid         = domain_sid;
 247         state->io.in.acct_control       = acct_control;
 248         state->io.in.version            = nt_version;
 249         state->io.in.map_response       = false;
 250
 251         subreq = cldap_netlogon_send(state,
 252                                      ctx->cldap_sock,
 253                                      &state->io);
 254         if (!subreq) {
 255                 DEBUG(0,("failed to send cldap netlogon call\n"));
 256                 TALLOC_FREE(state);
 257                 return;
 258         }
 259         tevent_req_set_callback(subreq, nmbd_proxy_logon_done, state);
 260
 261         /* we reply async */
 262         state->p->locked = true;
 263         talloc_set_destructor(state, nmbd_proxy_logon_state_destructor);
 264 }
 265
 266 static void nmbd_proxy_logon_done(struct tevent_req *subreq)
 267 {
 268         struct nmbd_proxy_logon_state *state =
 269                 tevent_req_callback_data(subreq,
 270                 struct nmbd_proxy_logon_state);
 271         NTSTATUS status;
 272         DATA_BLOB response = data_blob_null;
 273
 274         status = cldap_netlogon_recv(subreq, state, &state->io);
 275         if (!NT_STATUS_IS_OK(status)) {
 276                 DEBUG(0,("failed to recv cldap netlogon call: %s\n",
 277                         nt_errstr(status)));
 278                 TALLOC_FREE(state);
 279                 return;
 280         }
 281
 282         status = push_netlogon_samlogon_response(&response, state,
 283                                                  &state->io.out.netlogon);
 284         if (!NT_STATUS_IS_OK(status)) {
 285                 DEBUG(0,("failed to push netlogon_samlogon_response: %s\n",
 286                         nt_errstr(status)));
 287                 TALLOC_FREE(state);
 288                 return;
 289         }
 290
 291         send_mailslot(true, state->remote_mailslot,
 292                       (char *)response.data, response.length,
 293                       global_myname(), 0x0,
 294                       state->remote_name,
 295                       state->remote_name_type,
 296                       state->p->ip,
 297                       state->local_ip,
 298                       state->p->port);
 299         TALLOC_FREE(state);
 300 }
 301
 302 /****************************************************************************
 303 Process a domain logon packet
 304 **************************************************************************/
 305
 306 void process_logon_packet(struct packet_struct *p, char *buf,int len,
 307                           const char *mailslot)
 308 {
 309         struct dgram_packet *dgram = &p->packet.dgram;
 310         fstring my_name;
 311         fstring reply_name;
 312         char outbuf[1024];
 313         int code;
 314         uint16 token = 0;
 315         uint32 ntversion = 0;
 316         uint16 lmnttoken = 0;
 317         uint16 lm20token = 0;
 318         uint32 domainsidsize;
 319         bool short_request = False;
 320         char *getdc;
 321         char *uniuser; /* Unicode user name. */
 322         fstring ascuser;
 323         char *unicomp; /* Unicode computer name. */
 324         size_t size;
 325         struct sockaddr_storage ss;
 326         const struct sockaddr_storage *pss;
 327         struct in_addr ip;
 328
 329         in_addr_to_sockaddr_storage(&ss, p->ip);
 330         pss = iface_ip((struct sockaddr *)&ss);
 331         if (!pss) {
 332                 DEBUG(5,("process_logon_packet:can't find outgoing interface "
 333                         "for packet from IP %s\n",
 334                         inet_ntoa(p->ip) ));
 335                 return;
 336         }
 337         ip = ((struct sockaddr_in *)pss)->sin_addr;
 338
 339         memset(outbuf, 0, sizeof(outbuf));
 340
 341         if (!lp_domain_logons()) {
 342                 DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
 343 logons are not enabled.\n", inet_ntoa(p->ip) ));
 344                 return;
 345         }
 346
 347         fstrcpy(my_name, global_myname());
 348
 349         code = get_safe_SVAL(buf,len,buf,0,-1);
 350         DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
 351
 352         switch (code) {
 353                 case 0:
 354                         {
 355                                 fstring mach_str, user_str, getdc_str;
 356                                 char *q = buf + 2;
 357                                 char *machine = q;
 358                                 char *user = skip_string(buf,len,machine);
 359
 360                                 if (!user || PTR_DIFF(user, buf) >= len) {
 361                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 362                                         return;
 363                                 }
 364                                 getdc = skip_string(buf,len,user);
 365
 366                                 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
 367                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 368                                         return;
 369                                 }
 370                                 q = skip_string(buf,len,getdc);
 371
 372                                 if (!q || PTR_DIFF(q + 5, buf) > len) {
 373                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 374                                         return;
 375                                 }
 376                                 token = SVAL(q,3);
 377
 378                                 fstrcpy(reply_name,my_name);
 379
 380                                 pull_ascii_fstring(mach_str, machine);
 381                                 pull_ascii_fstring(user_str, user);
 382                                 pull_ascii_fstring(getdc_str, getdc);
 383
 384                                 DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
 385                                         mach_str,inet_ntoa(p->ip),user_str,token));
 386
 387                                 q = outbuf;
 388                                 SSVAL(q, 0, 6);
 389                                 q += 2;
 390
 391                                 fstrcpy(reply_name, "\\\\");
 392                                 fstrcat(reply_name, my_name);
 393                                 size = push_ascii(q,reply_name,
 394                                                 sizeof(outbuf)-PTR_DIFF(q, outbuf),
 395                                                 STR_TERMINATE);
 396                                 if (size == (size_t)-1) {
 397                                         return;
 398                                 }
 399                                 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
 400
 401                                 SSVAL(q, 0, token);
 402                                 q += 2;
 403
 404                                 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
 405
 406                                 send_mailslot(True, getdc_str,
 407                                                 outbuf,PTR_DIFF(q,outbuf),
 408                                                 global_myname(), 0x0,
 409                                                 mach_str,
 410                                                 dgram->source_name.name_type,
 411                                                 p->ip, ip, p->port);
 412                                 break;
 413                         }
 414
 415                 case LOGON_PRIMARY_QUERY:
 416                         {
 417                                 fstring mach_str, getdc_str;
 418                                 fstring source_name;
 419                                 char *q = buf + 2;
 420                                 char *machine = q;
 421
 422                                 if (!lp_domain_master()) {
 423                                         /* We're not Primary Domain Controller -- ignore this */
 424                                         return;
 425                                 }
 426
 427                                 getdc = skip_string(buf,len,machine);
 428
 429                                 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
 430                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 431                                         return;
 432                                 }
 433                                 q = skip_string(buf,len,getdc);
 434
 435                                 if (!q || PTR_DIFF(q, buf) >= len) {
 436                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 437                                         return;
 438                                 }
 439                                 q = ALIGN2(q, buf);
 440
 441                                 /* At this point we can work out if this is a W9X or NT style
 442                                    request. Experiments show that the difference is wether the
 443                                    packet ends here. For a W9X request we now end with a pair of
 444                                    bytes (usually 0xFE 0xFF) whereas with NT we have two further
 445                                    strings - the following is a simple way of detecting this */
 446
 447                                 if (len - PTR_DIFF(q, buf) <= 3) {
 448                                         short_request = True;
 449                                 } else {
 450                                         unicomp = q;
 451
 452                                         if (PTR_DIFF(q, buf) >= len) {
 453                                                 DEBUG(0,("process_logon_packet: bad packet\n"));
 454                                                 return;
 455                                         }
 456
 457                                         /* A full length (NT style) request */
 458                                         q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
 459
 460                                         if (PTR_DIFF(q, buf) >= len) {
 461                                                 DEBUG(0,("process_logon_packet: bad packet\n"));
 462                                                 return;
 463                                         }
 464
 465                                         if (len - PTR_DIFF(q, buf) > 8) {
 466                                                 /* with NT5 clients we can sometimes
 467                                                         get additional data - a length specificed string
 468                                                         containing the domain name, then 16 bytes of
 469                                                         data (no idea what it is) */
 470                                                 int dom_len = CVAL(q, 0);
 471                                                 q++;
 472                                                 if (dom_len != 0) {
 473                                                         q += dom_len + 1;
 474                                                 }
 475                                                 q += 16;
 476                                         }
 477
 478                                         if (PTR_DIFF(q + 8, buf) > len) {
 479                                                 DEBUG(0,("process_logon_packet: bad packet\n"));
 480                                                 return;
 481                                         }
 482
 483                                         ntversion = IVAL(q, 0);
 484                                         lmnttoken = SVAL(q, 4);
 485                                         lm20token = SVAL(q, 6);
 486                                 }
 487
 488                                 /* Construct reply. */
 489                                 q = outbuf;
 490                                 SSVAL(q, 0, NETLOGON_RESPONSE_FROM_PDC);
 491                                 q += 2;
 492
 493                                 fstrcpy(reply_name,my_name);
 494                                 size = push_ascii(q, reply_name,
 495                                                 sizeof(outbuf)-PTR_DIFF(q, outbuf),
 496                                                 STR_TERMINATE);
 497                                 if (size == (size_t)-1) {
 498                                         return;
 499                                 }
 500                                 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
 501
 502                                 /* PDC and domain name */
 503                                 if (!short_request) {
 504                                         /* Make a full reply */
 505                                         q = ALIGN2(q, outbuf);
 506
 507                                         q += dos_PutUniCode(q, my_name,
 508                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 509                                                 True); /* PDC name */
 510                                         q += dos_PutUniCode(q, lp_workgroup(),
 511                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 512                                                 True); /* Domain name*/
 513                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
 514                                                 return;
 515                                         }
 516                                         SIVAL(q, 0, 1); /* our nt version */
 517                                         SSVAL(q, 4, 0xffff); /* our lmnttoken */
 518                                         SSVAL(q, 6, 0xffff); /* our lm20token */
 519                                         q += 8;
 520                                 }
 521
 522                                 /* RJS, 21-Feb-2000, we send a short reply if the request was short */
 523
 524                                 pull_ascii_fstring(mach_str, machine);
 525
 526                                 DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, \
 527 reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
 528                                         mach_str,inet_ntoa(p->ip), reply_name, lp_workgroup(),
 529                                         NETLOGON_RESPONSE_FROM_PDC, (uint32)ntversion, (uint32)lmnttoken,
 530                                         (uint32)lm20token ));
 531
 532                                 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
 533
 534                                 pull_ascii_fstring(getdc_str, getdc);
 535                                 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
 536
 537                                 send_mailslot(True, getdc_str,
 538                                         outbuf,PTR_DIFF(q,outbuf),
 539                                         global_myname(), 0x0,
 540                                         source_name,
 541                                         dgram->source_name.name_type,
 542                                         p->ip, ip, p->port);
 543                                 return;
 544                         }
 545
 546                 case LOGON_SAM_LOGON_REQUEST:
 547
 548                         {
 549                                 fstring getdc_str;
 550                                 fstring source_name;
 551                                 char *source_addr;
 552                                 char *q = buf + 2;
 553                                 fstring asccomp;
 554
 555                                 if (global_nmbd_proxy_logon) {
 556                                         nmbd_proxy_logon(global_nmbd_proxy_logon,
 557                                                          ip, p, (uint8_t *)buf, len);
 558                                         return;
 559                                 }
 560
 561                                 q += 2;
 562
 563                                 if (PTR_DIFF(q, buf) >= len) {
 564                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 565                                         return;
 566                                 }
 567
 568                                 unicomp = q;
 569                                 uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
 570
 571                                 if (PTR_DIFF(uniuser, buf) >= len) {
 572                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 573                                         return;
 574                                 }
 575
 576                                 getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
 577
 578                                 if (PTR_DIFF(getdc, buf) >= len) {
 579                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 580                                         return;
 581                                 }
 582
 583                                 q = skip_string(buf,len,getdc);
 584
 585                                 if (!q || PTR_DIFF(q + 8, buf) >= len) {
 586                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 587                                         return;
 588                                 }
 589
 590                                 q += 4; /* Account Control Bits - indicating username type */
 591                                 domainsidsize = IVAL(q, 0);
 592                                 q += 4;
 593
 594                                 DEBUG(5,("process_logon_packet: LOGON_SAM_LOGON_REQUEST sidsize %d, len = %d\n", domainsidsize, len));
 595
 596                                 if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
 597                                         q += domainsidsize;
 598                                         q = ALIGN4(q, buf);
 599                                 }
 600
 601                                 DEBUG(5,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %ld\n", len, (unsigned long)PTR_DIFF(q, buf) ));
 602
 603                                 if (len - PTR_DIFF(q, buf) > 8) {
 604                                         /* with NT5 clients we can sometimes
 605                                                 get additional data - a length specificed string
 606                                                 containing the domain name, then 16 bytes of
 607                                                 data (no idea what it is) */
 608                                         int dom_len = CVAL(q, 0);
 609                                         q++;
 610                                         if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
 611                                                 q += dom_len + 1;
 612                                         }
 613                                         q += 16;
 614                                 }
 615
 616                                 if (PTR_DIFF(q + 8, buf) > len) {
 617                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 618                                         return;
 619                                 }
 620
 621                                 ntversion = IVAL(q, 0);
 622                                 lmnttoken = SVAL(q, 4);
 623                                 lm20token = SVAL(q, 6);
 624                                 q += 8;
 625
 626                                 DEBUG(3,("process_logon_packet: LOGON_SAM_LOGON_REQUEST sidsize %d ntv %d\n", domainsidsize, ntversion));
 627
 628                                 /*
 629                                  * we respond regadless of whether the machine is in our password
 630                                  * database. If it isn't then we let smbd send an appropriate error.
 631                                  * Let's ignore the SID.
 632                                  */
 633                                 pull_ucs2_fstring(ascuser, uniuser);
 634                                 pull_ucs2_fstring(asccomp, unicomp);
 635                                 DEBUG(5,("process_logon_packet: LOGON_SAM_LOGON_REQUEST user %s\n", ascuser));
 636
 637                                 fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
 638                                 fstrcat(reply_name, my_name);
 639
 640                                 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",
 641                                         asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
 642                                 LOGON_SAM_LOGON_RESPONSE ,lmnttoken));
 643
 644                                 /* Construct reply. */
 645
 646                                 q = outbuf;
 647                                 /* we want the simple version unless we are an ADS PDC..which means  */
 648                                 /* never, at least for now */
 649                                 if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
 650                                         if (SVAL(uniuser, 0) == 0) {
 651                                                 SSVAL(q, 0, LOGON_SAM_LOGON_USER_UNKNOWN);      /* user unknown */
 652                                         } else {
 653                                                 SSVAL(q, 0, LOGON_SAM_LOGON_RESPONSE);
 654                                         }
 655
 656                                         q += 2;
 657
 658                                         q += dos_PutUniCode(q, reply_name,
 659                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 660                                                 True);
 661                                         q += dos_PutUniCode(q, ascuser,
 662                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 663                                                 True);
 664                                         q += dos_PutUniCode(q, lp_workgroup(),
 665                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 666                                                 True);
 667                                 }
 668 #ifdef HAVE_ADS
 669                                 else {
 670                                         struct GUID domain_guid;
 671                                         UUID_FLAT flat_guid;
 672                                         char *domain;
 673                                         char *hostname;
 674                                         char *component, *dc, *q1;
 675                                         char *q_orig = q;
 676                                         int str_offset;
 677                                         char *saveptr = NULL;
 678
 679                                         domain = get_mydnsdomname(talloc_tos());
 680                                         if (!domain) {
 681                                                 DEBUG(2,
 682                                                 ("get_mydnsdomname failed.\n"));
 683                                                 return;
 684                                         }
 685                                         hostname = get_myname(talloc_tos());
 686                                         if (!hostname) {
 687                                                 DEBUG(2,
 688                                                 ("get_myname failed.\n"));
 689                                                 return;
 690                                         }
 691
 692                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
 693                                                 return;
 694                                         }
 695                                         if (SVAL(uniuser, 0) == 0) {
 696                                                 SIVAL(q, 0, LOGON_SAM_LOGON_USER_UNKNOWN_EX);   /* user unknown */
 697                                         } else {
 698                                                 SIVAL(q, 0, LOGON_SAM_LOGON_RESPONSE_EX);
 699                                         }
 700                                         q += 4;
 701
 702                                         SIVAL(q, 0, NBT_SERVER_PDC|NBT_SERVER_GC|NBT_SERVER_LDAP|NBT_SERVER_DS|
 703                                                 NBT_SERVER_KDC|NBT_SERVER_TIMESERV|NBT_SERVER_CLOSEST|NBT_SERVER_WRITABLE);
 704                                         q += 4;
 705
 706                                         /* Push Domain GUID */
 707                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < UUID_FLAT_SIZE) {
 708                                                 return;
 709                                         }
 710                                         if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
 711                                                 DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
 712                                                 return;
 713                                         }
 714
 715                                         smb_uuid_pack(domain_guid, &flat_guid);
 716                                         memcpy(q, &flat_guid.info, UUID_FLAT_SIZE);
 717                                         q += UUID_FLAT_SIZE;
 718
 719                                         /* Forest */
 720                                         str_offset = q - q_orig;
 721                                         dc = domain;
 722                                         q1 = q;
 723                                         while ((component = strtok_r(dc, ".", &saveptr)) != NULL) {
 724                                                 dc = NULL;
 725                                                 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
 726                                                         return;
 727                                                 }
 728                                                 size = push_ascii(&q[1], component,
 729                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 730                                                         0);
 731                                                 if (size == (size_t)-1 || size > 0xff) {
 732                                                         return;
 733                                                 }
 734                                                 SCVAL(q, 0, size);
 735                                                 q += (size + 1);
 736                                         }
 737
 738                                         /* Unk0 */
 739                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
 740                                                 return;
 741                                         }
 742                                         SCVAL(q, 0, 0);
 743                                         q++;
 744
 745                                         /* Domain */
 746                                         SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
 747                                         SCVAL(q, 1, str_offset & 0xFF);
 748                                         q += 2;
 749
 750                                         /* Hostname */
 751                                         size = push_ascii(&q[1], hostname,
 752                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 753                                                         0);
 754                                         if (size == (size_t)-1 || size > 0xff) {
 755                                                 return;
 756                                         }
 757                                         SCVAL(q, 0, size);
 758                                         q += (size + 1);
 759
 760                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 3) {
 761                                                 return;
 762                                         }
 763
 764                                         SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
 765                                         SCVAL(q, 1, str_offset & 0xFF);
 766                                         q += 2;
 767
 768                                         /* NETBIOS of domain */
 769                                         size = push_ascii(&q[1], lp_workgroup(),
 770                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 771                                                         STR_UPPER);
 772                                         if (size == (size_t)-1 || size > 0xff) {
 773                                                 return;
 774                                         }
 775                                         SCVAL(q, 0, size);
 776                                         q += (size + 1);
 777
 778                                         /* Unk1 */
 779                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 2) {
 780                                                 return;
 781                                         }
 782
 783                                         SCVAL(q, 0, 0);
 784                                         q++;
 785
 786                                         /* NETBIOS of hostname */
 787                                         size = push_ascii(&q[1], my_name,
 788                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 789                                                         0);
 790                                         if (size == (size_t)-1 || size > 0xff) {
 791                                                 return;
 792                                         }
 793                                         SCVAL(q, 0, size);
 794                                         q += (size + 1);
 795
 796                                         /* Unk2 */
 797                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
 798                                                 return;
 799                                         }
 800
 801                                         SCVAL(q, 0, 0);
 802                                         q++;
 803
 804                                         /* User name */
 805                                         if (SVAL(uniuser, 0) != 0) {
 806                                                 size = push_ascii(&q[1], ascuser,
 807                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 808                                                         0);
 809                                                 if (size == (size_t)-1 || size > 0xff) {
 810                                                         return;
 811                                                 }
 812                                                 SCVAL(q, 0, size);
 813                                                 q += (size + 1);
 814                                         }
 815
 816                                         q_orig = q;
 817                                         /* Site name */
 818                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
 819                                                 return;
 820                                         }
 821                                         size = push_ascii(&q[1], "Default-First-Site-Name",
 822                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 823                                                         0);
 824                                         if (size == (size_t)-1 || size > 0xff) {
 825                                                 return;
 826                                         }
 827                                         SCVAL(q, 0, size);
 828                                         q += (size + 1);
 829
 830                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 18) {
 831                                                 return;
 832                                         }
 833
 834                                         /* Site name (2) */
 835                                         str_offset = q - q_orig;
 836                                         SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
 837                                         SCVAL(q, 1, str_offset & 0xFF);
 838                                         q += 2;
 839
 840                                         SCVAL(q, 0, PTR_DIFF(q,q1));
 841                                         SCVAL(q, 1, 0x10); /* unknown */
 842
 843                                         SIVAL(q, 0, 0x00000002);
 844                                         q += 4; /* unknown */
 845                                         SIVAL(q, 0, ntohl(ip.s_addr));
 846                                         q += 4;
 847                                         SIVAL(q, 0, 0x00000000);
 848                                         q += 4; /* unknown */
 849                                         SIVAL(q, 0, 0x00000000);
 850                                         q += 4; /* unknown */
 851                                 }
 852 #endif
 853
 854                                 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
 855                                         return;
 856                                 }
 857
 858                                 /* tell the client what version we are */
 859                                 SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
 860                                 /* our ntversion */
 861                                 SSVAL(q, 4, 0xffff); /* our lmnttoken */
 862                                 SSVAL(q, 6, 0xffff); /* our lm20token */
 863                                 q += 8;
 864
 865                                 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
 866
 867                                 pull_ascii_fstring(getdc_str, getdc);
 868                                 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
 869                                 source_addr = SMB_STRDUP(inet_ntoa(dgram->header.source_ip));
 870                                 if (source_addr == NULL) {
 871                                         DEBUG(3, ("out of memory copying client"
 872                                                   " address string\n"));
 873                                         return;
 874                                 }
 875
 876                                 /*
 877                                  * handle delay.
 878                                  * packets requeued after delay are marked as
 879                                  * locked.
 880                                  */
 881                                 if ((p->locked == False) &&
 882                                     (strlen(ascuser) == 0) &&
 883                                     delay_logon(source_name, source_addr))
 884                                 {
 885                                         struct timeval when;
 886
 887                                         DEBUG(3, ("process_logon_packet: "
 888                                                   "delaying initial logon "
 889                                                   "reply for client %s(%s) for "
 890                                                   "%u milliseconds\n",
 891                                                   source_name, source_addr,
 892                                                   lp_init_logon_delay()));
 893
 894                                         when = timeval_current_ofs(0,
 895                                                 lp_init_logon_delay() * 1000);
 896                                         p->locked = true;
 897                                         event_add_timed(nmbd_event_context(),
 898                                                         NULL,
 899                                                         when,
 900                                                         delayed_init_logon_handler,
 901                                                         p);
 902                                 } else {
 903                                         DEBUG(3, ("process_logon_packet: "
 904                                                   "processing delayed initial "
 905                                                   "logon reply for client "
 906                                                   "%s(%s)\n",
 907                                                   source_name, source_addr));
 908
 909                                         p->locked = false;
 910                                         send_mailslot(true, getdc,
 911                                                 outbuf,PTR_DIFF(q,outbuf),
 912                                                 global_myname(), 0x0,
 913                                                 source_name,
 914                                                 dgram->source_name.name_type,
 915                                                 p->ip, ip, p->port);
 916                                 }
 917
 918                                 SAFE_FREE(source_addr);
 919
 920                                 break;
 921                         }
 922
 923                 /* Announce change to UAS or SAM.  Send by the domain controller when a
 924                 replication event is required. */
 925
 926                 case NETLOGON_ANNOUNCE_UAS:
 927                         DEBUG(5, ("Got NETLOGON_ANNOUNCE_UAS\n"));
 928                         break;
 929
 930                 default:
 931                         DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
 932                         return;
 933         }
 934 }