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