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 #include "nmbd/nmbd.h"
  33
  34 struct sam_database_info {
  35         uint32 index;
  36         uint32 serial_lo, serial_hi;
  37         uint32 date_lo, date_hi;
  38 };
  39
  40 /**
  41  * check whether the client belongs to the hosts
  42  * for which initial logon should be delayed...
  43  */
  44 static bool delay_logon(const char *peer_name, const char *peer_addr)
  45 {
  46         const char **delay_list = lp_init_logon_delayed_hosts();
  47         const char *peer[2];
  48
  49         if (delay_list == NULL) {
  50                 return False;
  51         }
  52
  53         peer[0] = peer_name;
  54         peer[1] = peer_addr;
  55
  56         return list_match(delay_list, (const char *)peer, client_match);
  57 }
  58
  59 static void delayed_init_logon_handler(struct event_context *event_ctx,
  60                                        struct timed_event *te,
  61                                        struct timeval now,
  62                                        void *private_data)
  63 {
  64         struct packet_struct *p = (struct packet_struct *)private_data;
  65
  66         DEBUG(10, ("delayed_init_logon_handler (%lx): re-queuing packet.\n",
  67                    (unsigned long)te));
  68
  69         queue_packet(p);
  70
  71         TALLOC_FREE(te);
  72 }
  73
  74 struct nmbd_proxy_logon_context {
  75         struct cldap_socket *cldap_sock;
  76 };
  77
  78 static struct nmbd_proxy_logon_context *global_nmbd_proxy_logon;
  79
  80 bool initialize_nmbd_proxy_logon(void)
  81 {
  82         const char *cldap_server = lp_parm_const_string(-1, "nmbd_proxy_logon",
  83                                                         "cldap_server", NULL);
  84         struct nmbd_proxy_logon_context *ctx;
  85         NTSTATUS status;
  86         struct in_addr addr;
  87         char addrstr[INET_ADDRSTRLEN];
  88         const char *server_str;
  89         int ret;
  90         struct tsocket_address *server_addr;
  91
  92         if (!cldap_server) {
  93                 return true;
  94         }
  95
  96         addr = interpret_addr2(cldap_server);
  97         server_str = inet_ntop(AF_INET, &addr,
  98                              addrstr, sizeof(addrstr));
  99         if (!server_str || strcmp("0.0.0.0", server_str) == 0) {
 100                 DEBUG(0,("Failed to resolve[%s] for nmbd_proxy_logon\n",
 101                          cldap_server));
 102                 return false;
 103         }
 104
 105         ctx = talloc_zero(nmbd_event_context(),
 106                           struct nmbd_proxy_logon_context);
 107         if (!ctx) {
 108                 return false;
 109         }
 110
 111         ret = tsocket_address_inet_from_strings(ctx, "ipv4",
 112                                                 server_str, LDAP_PORT,
 113                                                 &server_addr);
 114         if (ret != 0) {
 115                 TALLOC_FREE(ctx);
 116                 status = map_nt_error_from_unix(errno);
 117                 DEBUG(0,("Failed to create cldap tsocket_address for %s - %s\n",
 118                          server_str, nt_errstr(status)));
 119                 return false;
 120         }
 121
 122         /* we create a connected udp socket */
 123         status = cldap_socket_init(ctx, nmbd_event_context(), NULL,
 124                                    server_addr, &ctx->cldap_sock);
 125         TALLOC_FREE(server_addr);
 126         if (!NT_STATUS_IS_OK(status)) {
 127                 TALLOC_FREE(ctx);
 128                 DEBUG(0,("failed to create cldap socket for %s: %s\n",
 129                         server_str, nt_errstr(status)));
 130                 return false;
 131         }
 132
 133         global_nmbd_proxy_logon = ctx;
 134         return true;
 135 }
 136
 137 struct nmbd_proxy_logon_state {
 138         struct in_addr local_ip;
 139         struct packet_struct *p;
 140         const char *remote_name;
 141         uint8_t remote_name_type;
 142         const char *remote_mailslot;
 143         struct nbt_netlogon_packet req;
 144         struct nbt_netlogon_response resp;
 145         struct cldap_netlogon io;
 146 };
 147
 148 static int nmbd_proxy_logon_state_destructor(struct nmbd_proxy_logon_state *s)
 149 {
 150         s->p->locked = false;
 151         free_packet(s->p);
 152         return 0;
 153 }
 154
 155 static void nmbd_proxy_logon_done(struct tevent_req *subreq);
 156
 157 static void nmbd_proxy_logon(struct nmbd_proxy_logon_context *ctx,
 158                              struct in_addr local_ip,
 159                              struct packet_struct *p,
 160                              uint8_t *buf,
 161                              uint32_t len)
 162 {
 163         struct nmbd_proxy_logon_state *state;
 164         enum ndr_err_code ndr_err;
 165         DATA_BLOB blob = data_blob_const(buf, len);
 166         const char *computer_name = NULL;
 167         const char *mailslot_name = NULL;
 168         const char *user_name = NULL;
 169         const char *domain_sid = NULL;
 170         uint32_t acct_control = 0;
 171         uint32_t nt_version = 0;
 172         struct tevent_req *subreq;
 173         fstring source_name;
 174         struct dgram_packet *dgram = &p->packet.dgram;
 175
 176         state = TALLOC_ZERO_P(ctx, struct nmbd_proxy_logon_state);
 177         if (!state) {
 178                 DEBUG(0,("failed to allocate nmbd_proxy_logon_state\n"));
 179                 return;
 180         }
 181
 182         pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
 183         state->remote_name = talloc_strdup(state, source_name);
 184         state->remote_name_type = dgram->source_name.name_type,
 185         state->local_ip = local_ip;
 186         state->p = p;
 187
 188         ndr_err = ndr_pull_struct_blob(
 189                 &blob, state, &state->req,
 190                 (ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
 191         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 192                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 193                 DEBUG(0,("failed parse nbt_netlogon_packet: %s\n",
 194                         nt_errstr(status)));
 195                 TALLOC_FREE(state);
 196                 return;
 197         }
 198
 199         if (DEBUGLEVEL >= 10) {
 200                 DEBUG(10, ("nmbd_proxy_logon:\n"));
 201                 NDR_PRINT_DEBUG(nbt_netlogon_packet, &state->req);
 202         }
 203
 204         switch (state->req.command) {
 205         case LOGON_SAM_LOGON_REQUEST:
 206                 computer_name   = state->req.req.logon.computer_name;
 207                 user_name       = state->req.req.logon.user_name;
 208                 mailslot_name   = state->req.req.logon.mailslot_name;
 209                 acct_control    = state->req.req.logon.acct_control;
 210                 if (state->req.req.logon.sid_size > 0) {
 211                         domain_sid = dom_sid_string(state,
 212                                                     &state->req.req.logon.sid);
 213                         if (!domain_sid) {
 214                                 DEBUG(0,("failed to get a string for sid\n"));
 215                                 TALLOC_FREE(state);
 216                                 return;
 217                         }
 218                 }
 219                 nt_version      = state->req.req.logon.nt_version;
 220                 break;
 221
 222         default:
 223                 /* this can't happen as the caller already checks the command */
 224                 break;
 225         }
 226
 227         state->remote_mailslot = mailslot_name;
 228
 229         if (user_name && strlen(user_name) == 0) {
 230                 user_name = NULL;
 231         }
 232
 233         if (computer_name && strlen(computer_name) == 0) {
 234                 computer_name = NULL;
 235         }
 236
 237         /*
 238          * as the socket is connected,
 239          * we don't need to specify the destination
 240          */
 241         state->io.in.dest_address       = NULL;
 242         state->io.in.dest_port          = 0;
 243         state->io.in.realm              = NULL;
 244         state->io.in.host               = computer_name;
 245         state->io.in.user               = user_name;
 246         state->io.in.domain_guid        = NULL;
 247         state->io.in.domain_sid         = domain_sid;
 248         state->io.in.acct_control       = acct_control;
 249         state->io.in.version            = nt_version;
 250         state->io.in.map_response       = false;
 251
 252         subreq = cldap_netlogon_send(state,
 253                                      ctx->cldap_sock,
 254                                      &state->io);
 255         if (!subreq) {
 256                 DEBUG(0,("failed to send cldap netlogon call\n"));
 257                 TALLOC_FREE(state);
 258                 return;
 259         }
 260         tevent_req_set_callback(subreq, nmbd_proxy_logon_done, state);
 261
 262         /* we reply async */
 263         state->p->locked = true;
 264         talloc_set_destructor(state, nmbd_proxy_logon_state_destructor);
 265 }
 266
 267 static void nmbd_proxy_logon_done(struct tevent_req *subreq)
 268 {
 269         struct nmbd_proxy_logon_state *state =
 270                 tevent_req_callback_data(subreq,
 271                 struct nmbd_proxy_logon_state);
 272         NTSTATUS status;
 273         DATA_BLOB response = data_blob_null;
 274
 275         status = cldap_netlogon_recv(subreq, state, &state->io);
 276         if (!NT_STATUS_IS_OK(status)) {
 277                 DEBUG(0,("failed to recv cldap netlogon call: %s\n",
 278                         nt_errstr(status)));
 279                 TALLOC_FREE(state);
 280                 return;
 281         }
 282
 283         status = push_netlogon_samlogon_response(&response, state,
 284                                                  &state->io.out.netlogon);
 285         if (!NT_STATUS_IS_OK(status)) {
 286                 DEBUG(0,("failed to push netlogon_samlogon_response: %s\n",
 287                         nt_errstr(status)));
 288                 TALLOC_FREE(state);
 289                 return;
 290         }
 291
 292         send_mailslot(true, state->remote_mailslot,
 293                       (char *)response.data, response.length,
 294                       global_myname(), 0x0,
 295                       state->remote_name,
 296                       state->remote_name_type,
 297                       state->p->ip,
 298                       state->local_ip,
 299                       state->p->port);
 300         TALLOC_FREE(state);
 301 }
 302
 303 /****************************************************************************
 304 Process a domain logon packet
 305 **************************************************************************/
 306
 307 void process_logon_packet(struct packet_struct *p, char *buf,int len,
 308                           const char *mailslot)
 309 {
 310         struct dgram_packet *dgram = &p->packet.dgram;
 311         fstring my_name;
 312         fstring reply_name;
 313         char outbuf[1024];
 314         int code;
 315         uint16 token = 0;
 316         uint32 ntversion = 0;
 317         uint16 lmnttoken = 0;
 318         uint16 lm20token = 0;
 319         uint32 domainsidsize;
 320         bool short_request = False;
 321         char *getdc;
 322         char *uniuser; /* Unicode user name. */
 323         fstring ascuser;
 324         char *unicomp; /* Unicode computer name. */
 325         size_t size;
 326         struct sockaddr_storage ss;
 327         const struct sockaddr_storage *pss;
 328         struct in_addr ip;
 329
 330         in_addr_to_sockaddr_storage(&ss, p->ip);
 331         pss = iface_ip((struct sockaddr *)&ss);
 332         if (!pss) {
 333                 DEBUG(5,("process_logon_packet:can't find outgoing interface "
 334                         "for packet from IP %s\n",
 335                         inet_ntoa(p->ip) ));
 336                 return;
 337         }
 338         ip = ((struct sockaddr_in *)pss)->sin_addr;
 339
 340         memset(outbuf, 0, sizeof(outbuf));
 341
 342         if (!lp_domain_logons()) {
 343                 DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
 344 logons are not enabled.\n", inet_ntoa(p->ip) ));
 345                 return;
 346         }
 347
 348         fstrcpy(my_name, global_myname());
 349
 350         code = get_safe_SVAL(buf,len,buf,0,-1);
 351         DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
 352
 353         switch (code) {
 354                 case 0:
 355                         {
 356                                 fstring mach_str, user_str, getdc_str;
 357                                 char *q = buf + 2;
 358                                 char *machine = q;
 359                                 char *user = skip_string(buf,len,machine);
 360
 361                                 if (!user || PTR_DIFF(user, buf) >= len) {
 362                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 363                                         return;
 364                                 }
 365                                 getdc = skip_string(buf,len,user);
 366
 367                                 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
 368                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 369                                         return;
 370                                 }
 371                                 q = skip_string(buf,len,getdc);
 372
 373                                 if (!q || PTR_DIFF(q + 5, buf) > len) {
 374                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 375                                         return;
 376                                 }
 377                                 token = SVAL(q,3);
 378
 379                                 fstrcpy(reply_name,my_name);
 380
 381                                 pull_ascii_fstring(mach_str, machine);
 382                                 pull_ascii_fstring(user_str, user);
 383                                 pull_ascii_fstring(getdc_str, getdc);
 384
 385                                 DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
 386                                         mach_str,inet_ntoa(p->ip),user_str,token));
 387
 388                                 q = outbuf;
 389                                 SSVAL(q, 0, 6);
 390                                 q += 2;
 391
 392                                 fstrcpy(reply_name, "\\\\");
 393                                 fstrcat(reply_name, my_name);
 394                                 size = push_ascii(q,reply_name,
 395                                                 sizeof(outbuf)-PTR_DIFF(q, outbuf),
 396                                                 STR_TERMINATE);
 397                                 if (size == (size_t)-1) {
 398                                         return;
 399                                 }
 400                                 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
 401
 402                                 SSVAL(q, 0, token);
 403                                 q += 2;
 404
 405                                 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
 406
 407                                 send_mailslot(True, getdc_str,
 408                                                 outbuf,PTR_DIFF(q,outbuf),
 409                                                 global_myname(), 0x0,
 410                                                 mach_str,
 411                                                 dgram->source_name.name_type,
 412                                                 p->ip, ip, p->port);
 413                                 break;
 414                         }
 415
 416                 case LOGON_PRIMARY_QUERY:
 417                         {
 418                                 fstring mach_str, getdc_str;
 419                                 fstring source_name;
 420                                 char *q = buf + 2;
 421                                 char *machine = q;
 422
 423                                 if (!lp_domain_master()) {
 424                                         /* We're not Primary Domain Controller -- ignore this */
 425                                         return;
 426                                 }
 427
 428                                 getdc = skip_string(buf,len,machine);
 429
 430                                 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
 431                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 432                                         return;
 433                                 }
 434                                 q = skip_string(buf,len,getdc);
 435
 436                                 if (!q || PTR_DIFF(q, buf) >= len) {
 437                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 438                                         return;
 439                                 }
 440                                 q = ALIGN2(q, buf);
 441
 442                                 /* At this point we can work out if this is a W9X or NT style
 443                                    request. Experiments show that the difference is wether the
 444                                    packet ends here. For a W9X request we now end with a pair of
 445                                    bytes (usually 0xFE 0xFF) whereas with NT we have two further
 446                                    strings - the following is a simple way of detecting this */
 447
 448                                 if (len - PTR_DIFF(q, buf) <= 3) {
 449                                         short_request = True;
 450                                 } else {
 451                                         unicomp = q;
 452
 453                                         if (PTR_DIFF(q, buf) >= len) {
 454                                                 DEBUG(0,("process_logon_packet: bad packet\n"));
 455                                                 return;
 456                                         }
 457
 458                                         /* A full length (NT style) request */
 459                                         q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
 460
 461                                         if (PTR_DIFF(q, buf) >= len) {
 462                                                 DEBUG(0,("process_logon_packet: bad packet\n"));
 463                                                 return;
 464                                         }
 465
 466                                         if (len - PTR_DIFF(q, buf) > 8) {
 467                                                 /* with NT5 clients we can sometimes
 468                                                         get additional data - a length specificed string
 469                                                         containing the domain name, then 16 bytes of
 470                                                         data (no idea what it is) */
 471                                                 int dom_len = CVAL(q, 0);
 472                                                 q++;
 473                                                 if (dom_len != 0) {
 474                                                         q += dom_len + 1;
 475                                                 }
 476                                                 q += 16;
 477                                         }
 478
 479                                         if (PTR_DIFF(q + 8, buf) > len) {
 480                                                 DEBUG(0,("process_logon_packet: bad packet\n"));
 481                                                 return;
 482                                         }
 483
 484                                         ntversion = IVAL(q, 0);
 485                                         lmnttoken = SVAL(q, 4);
 486                                         lm20token = SVAL(q, 6);
 487                                 }
 488
 489                                 /* Construct reply. */
 490                                 q = outbuf;
 491                                 SSVAL(q, 0, NETLOGON_RESPONSE_FROM_PDC);
 492                                 q += 2;
 493
 494                                 fstrcpy(reply_name,my_name);
 495                                 size = push_ascii(q, reply_name,
 496                                                 sizeof(outbuf)-PTR_DIFF(q, outbuf),
 497                                                 STR_TERMINATE);
 498                                 if (size == (size_t)-1) {
 499                                         return;
 500                                 }
 501                                 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
 502
 503                                 /* PDC and domain name */
 504                                 if (!short_request) {
 505                                         /* Make a full reply */
 506                                         q = ALIGN2(q, outbuf);
 507
 508                                         q += dos_PutUniCode(q, my_name,
 509                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 510                                                 True); /* PDC name */
 511                                         q += dos_PutUniCode(q, lp_workgroup(),
 512                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 513                                                 True); /* Domain name*/
 514                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
 515                                                 return;
 516                                         }
 517                                         SIVAL(q, 0, 1); /* our nt version */
 518                                         SSVAL(q, 4, 0xffff); /* our lmnttoken */
 519                                         SSVAL(q, 6, 0xffff); /* our lm20token */
 520                                         q += 8;
 521                                 }
 522
 523                                 /* RJS, 21-Feb-2000, we send a short reply if the request was short */
 524
 525                                 pull_ascii_fstring(mach_str, machine);
 526
 527                                 DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, \
 528 reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
 529                                         mach_str,inet_ntoa(p->ip), reply_name, lp_workgroup(),
 530                                         NETLOGON_RESPONSE_FROM_PDC, (uint32)ntversion, (uint32)lmnttoken,
 531                                         (uint32)lm20token ));
 532
 533                                 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
 534
 535                                 pull_ascii_fstring(getdc_str, getdc);
 536                                 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
 537
 538                                 send_mailslot(True, getdc_str,
 539                                         outbuf,PTR_DIFF(q,outbuf),
 540                                         global_myname(), 0x0,
 541                                         source_name,
 542                                         dgram->source_name.name_type,
 543                                         p->ip, ip, p->port);
 544                                 return;
 545                         }
 546
 547                 case LOGON_SAM_LOGON_REQUEST:
 548
 549                         {
 550                                 fstring getdc_str;
 551                                 fstring source_name;
 552                                 char *source_addr;
 553                                 char *q = buf + 2;
 554                                 fstring asccomp;
 555
 556                                 if (global_nmbd_proxy_logon) {
 557                                         nmbd_proxy_logon(global_nmbd_proxy_logon,
 558                                                          ip, p, (uint8_t *)buf, len);
 559                                         return;
 560                                 }
 561
 562                                 q += 2;
 563
 564                                 if (PTR_DIFF(q, buf) >= len) {
 565                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 566                                         return;
 567                                 }
 568
 569                                 unicomp = q;
 570                                 uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
 571
 572                                 if (PTR_DIFF(uniuser, buf) >= len) {
 573                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 574                                         return;
 575                                 }
 576
 577                                 getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
 578
 579                                 if (PTR_DIFF(getdc, buf) >= len) {
 580                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 581                                         return;
 582                                 }
 583
 584                                 q = skip_string(buf,len,getdc);
 585
 586                                 if (!q || PTR_DIFF(q + 8, buf) >= len) {
 587                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 588                                         return;
 589                                 }
 590
 591                                 q += 4; /* Account Control Bits - indicating username type */
 592                                 domainsidsize = IVAL(q, 0);
 593                                 q += 4;
 594
 595                                 DEBUG(5,("process_logon_packet: LOGON_SAM_LOGON_REQUEST sidsize %d, len = %d\n", domainsidsize, len));
 596
 597                                 if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
 598                                         q += domainsidsize;
 599                                         q = ALIGN4(q, buf);
 600                                 }
 601
 602                                 DEBUG(5,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %ld\n", len, (unsigned long)PTR_DIFF(q, buf) ));
 603
 604                                 if (len - PTR_DIFF(q, buf) > 8) {
 605                                         /* with NT5 clients we can sometimes
 606                                                 get additional data - a length specificed string
 607                                                 containing the domain name, then 16 bytes of
 608                                                 data (no idea what it is) */
 609                                         int dom_len = CVAL(q, 0);
 610                                         q++;
 611                                         if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
 612                                                 q += dom_len + 1;
 613                                         }
 614                                         q += 16;
 615                                 }
 616
 617                                 if (PTR_DIFF(q + 8, buf) > len) {
 618                                         DEBUG(0,("process_logon_packet: bad packet\n"));
 619                                         return;
 620                                 }
 621
 622                                 ntversion = IVAL(q, 0);
 623                                 lmnttoken = SVAL(q, 4);
 624                                 lm20token = SVAL(q, 6);
 625                                 q += 8;
 626
 627                                 DEBUG(3,("process_logon_packet: LOGON_SAM_LOGON_REQUEST sidsize %d ntv %d\n", domainsidsize, ntversion));
 628
 629                                 /*
 630                                  * we respond regadless of whether the machine is in our password
 631                                  * database. If it isn't then we let smbd send an appropriate error.
 632                                  * Let's ignore the SID.
 633                                  */
 634                                 pull_ucs2_fstring(ascuser, uniuser);
 635                                 pull_ucs2_fstring(asccomp, unicomp);
 636                                 DEBUG(5,("process_logon_packet: LOGON_SAM_LOGON_REQUEST user %s\n", ascuser));
 637
 638                                 fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
 639                                 fstrcat(reply_name, my_name);
 640
 641                                 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",
 642                                         asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
 643                                 LOGON_SAM_LOGON_RESPONSE ,lmnttoken));
 644
 645                                 /* Construct reply. */
 646
 647                                 q = outbuf;
 648                                 /* we want the simple version unless we are an ADS PDC..which means  */
 649                                 /* never, at least for now */
 650                                 if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
 651                                         if (SVAL(uniuser, 0) == 0) {
 652                                                 SSVAL(q, 0, LOGON_SAM_LOGON_USER_UNKNOWN);      /* user unknown */
 653                                         } else {
 654                                                 SSVAL(q, 0, LOGON_SAM_LOGON_RESPONSE);
 655                                         }
 656
 657                                         q += 2;
 658
 659                                         q += dos_PutUniCode(q, reply_name,
 660                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 661                                                 True);
 662                                         q += dos_PutUniCode(q, ascuser,
 663                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 664                                                 True);
 665                                         q += dos_PutUniCode(q, lp_workgroup(),
 666                                                 sizeof(outbuf) - PTR_DIFF(q, outbuf),
 667                                                 True);
 668                                 }
 669 #ifdef HAVE_ADS
 670                                 else {
 671                                         struct GUID domain_guid;
 672                                         UUID_FLAT flat_guid;
 673                                         char *domain;
 674                                         char *hostname;
 675                                         char *component, *dc, *q1;
 676                                         char *q_orig = q;
 677                                         int str_offset;
 678                                         char *saveptr = NULL;
 679
 680                                         domain = get_mydnsdomname(talloc_tos());
 681                                         if (!domain) {
 682                                                 DEBUG(2,
 683                                                 ("get_mydnsdomname failed.\n"));
 684                                                 return;
 685                                         }
 686                                         hostname = get_myname(talloc_tos());
 687                                         if (!hostname) {
 688                                                 DEBUG(2,
 689                                                 ("get_myname failed.\n"));
 690                                                 return;
 691                                         }
 692
 693                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
 694                                                 return;
 695                                         }
 696                                         if (SVAL(uniuser, 0) == 0) {
 697                                                 SIVAL(q, 0, LOGON_SAM_LOGON_USER_UNKNOWN_EX);   /* user unknown */
 698                                         } else {
 699                                                 SIVAL(q, 0, LOGON_SAM_LOGON_RESPONSE_EX);
 700                                         }
 701                                         q += 4;
 702
 703                                         SIVAL(q, 0, NBT_SERVER_PDC|NBT_SERVER_GC|NBT_SERVER_LDAP|NBT_SERVER_DS|
 704                                                 NBT_SERVER_KDC|NBT_SERVER_TIMESERV|NBT_SERVER_CLOSEST|NBT_SERVER_WRITABLE);
 705                                         q += 4;
 706
 707                                         /* Push Domain GUID */
 708                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < UUID_FLAT_SIZE) {
 709                                                 return;
 710                                         }
 711                                         if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
 712                                                 DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
 713                                                 return;
 714                                         }
 715
 716                                         smb_uuid_pack(domain_guid, &flat_guid);
 717                                         memcpy(q, &flat_guid.info, UUID_FLAT_SIZE);
 718                                         q += UUID_FLAT_SIZE;
 719
 720                                         /* Forest */
 721                                         str_offset = q - q_orig;
 722                                         dc = domain;
 723                                         q1 = q;
 724                                         while ((component = strtok_r(dc, ".", &saveptr)) != NULL) {
 725                                                 dc = NULL;
 726                                                 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
 727                                                         return;
 728                                                 }
 729                                                 size = push_ascii(&q[1], component,
 730                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 731                                                         0);
 732                                                 if (size == (size_t)-1 || size > 0xff) {
 733                                                         return;
 734                                                 }
 735                                                 SCVAL(q, 0, size);
 736                                                 q += (size + 1);
 737                                         }
 738
 739                                         /* Unk0 */
 740                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
 741                                                 return;
 742                                         }
 743                                         SCVAL(q, 0, 0);
 744                                         q++;
 745
 746                                         /* Domain */
 747                                         SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
 748                                         SCVAL(q, 1, str_offset & 0xFF);
 749                                         q += 2;
 750
 751                                         /* Hostname */
 752                                         size = push_ascii(&q[1], hostname,
 753                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 754                                                         0);
 755                                         if (size == (size_t)-1 || size > 0xff) {
 756                                                 return;
 757                                         }
 758                                         SCVAL(q, 0, size);
 759                                         q += (size + 1);
 760
 761                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 3) {
 762                                                 return;
 763                                         }
 764
 765                                         SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
 766                                         SCVAL(q, 1, str_offset & 0xFF);
 767                                         q += 2;
 768
 769                                         /* NETBIOS of domain */
 770                                         size = push_ascii(&q[1], lp_workgroup(),
 771                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 772                                                         STR_UPPER);
 773                                         if (size == (size_t)-1 || size > 0xff) {
 774                                                 return;
 775                                         }
 776                                         SCVAL(q, 0, size);
 777                                         q += (size + 1);
 778
 779                                         /* Unk1 */
 780                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 2) {
 781                                                 return;
 782                                         }
 783
 784                                         SCVAL(q, 0, 0);
 785                                         q++;
 786
 787                                         /* NETBIOS of hostname */
 788                                         size = push_ascii(&q[1], my_name,
 789                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 790                                                         0);
 791                                         if (size == (size_t)-1 || size > 0xff) {
 792                                                 return;
 793                                         }
 794                                         SCVAL(q, 0, size);
 795                                         q += (size + 1);
 796
 797                                         /* Unk2 */
 798                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
 799                                                 return;
 800                                         }
 801
 802                                         SCVAL(q, 0, 0);
 803                                         q++;
 804
 805                                         /* User name */
 806                                         if (SVAL(uniuser, 0) != 0) {
 807                                                 size = push_ascii(&q[1], ascuser,
 808                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 809                                                         0);
 810                                                 if (size == (size_t)-1 || size > 0xff) {
 811                                                         return;
 812                                                 }
 813                                                 SCVAL(q, 0, size);
 814                                                 q += (size + 1);
 815                                         }
 816
 817                                         q_orig = q;
 818                                         /* Site name */
 819                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
 820                                                 return;
 821                                         }
 822                                         size = push_ascii(&q[1], "Default-First-Site-Name",
 823                                                         sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
 824                                                         0);
 825                                         if (size == (size_t)-1 || size > 0xff) {
 826                                                 return;
 827                                         }
 828                                         SCVAL(q, 0, size);
 829                                         q += (size + 1);
 830
 831                                         if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 18) {
 832                                                 return;
 833                                         }
 834
 835                                         /* Site name (2) */
 836                                         str_offset = q - q_orig;
 837                                         SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
 838                                         SCVAL(q, 1, str_offset & 0xFF);
 839                                         q += 2;
 840
 841                                         SCVAL(q, 0, PTR_DIFF(q,q1));
 842                                         SCVAL(q, 1, 0x10); /* unknown */
 843
 844                                         SIVAL(q, 0, 0x00000002);
 845                                         q += 4; /* unknown */
 846                                         SIVAL(q, 0, ntohl(ip.s_addr));
 847                                         q += 4;
 848                                         SIVAL(q, 0, 0x00000000);
 849                                         q += 4; /* unknown */
 850                                         SIVAL(q, 0, 0x00000000);
 851                                         q += 4; /* unknown */
 852                                 }
 853 #endif
 854
 855                                 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
 856                                         return;
 857                                 }
 858
 859                                 /* tell the client what version we are */
 860                                 SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
 861                                 /* our ntversion */
 862                                 SSVAL(q, 4, 0xffff); /* our lmnttoken */
 863                                 SSVAL(q, 6, 0xffff); /* our lm20token */
 864                                 q += 8;
 865
 866                                 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
 867
 868                                 pull_ascii_fstring(getdc_str, getdc);
 869                                 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
 870                                 source_addr = SMB_STRDUP(inet_ntoa(dgram->header.source_ip));
 871                                 if (source_addr == NULL) {
 872                                         DEBUG(3, ("out of memory copying client"
 873                                                   " address string\n"));
 874                                         return;
 875                                 }
 876
 877                                 /*
 878                                  * handle delay.
 879                                  * packets requeued after delay are marked as
 880                                  * locked.
 881                                  */
 882                                 if ((p->locked == False) &&
 883                                     (strlen(ascuser) == 0) &&
 884                                     delay_logon(source_name, source_addr))
 885                                 {
 886                                         struct timeval when;
 887
 888                                         DEBUG(3, ("process_logon_packet: "
 889                                                   "delaying initial logon "
 890                                                   "reply for client %s(%s) for "
 891                                                   "%u milliseconds\n",
 892                                                   source_name, source_addr,
 893                                                   lp_init_logon_delay()));
 894
 895                                         when = timeval_current_ofs(0,
 896                                                 lp_init_logon_delay() * 1000);
 897                                         p->locked = true;
 898                                         event_add_timed(nmbd_event_context(),
 899                                                         NULL,
 900                                                         when,
 901                                                         delayed_init_logon_handler,
 902                                                         p);
 903                                 } else {
 904                                         DEBUG(3, ("process_logon_packet: "
 905                                                   "processing delayed initial "
 906                                                   "logon reply for client "
 907                                                   "%s(%s)\n",
 908                                                   source_name, source_addr));
 909
 910                                         p->locked = false;
 911                                         send_mailslot(true, getdc,
 912                                                 outbuf,PTR_DIFF(q,outbuf),
 913                                                 global_myname(), 0x0,
 914                                                 source_name,
 915                                                 dgram->source_name.name_type,
 916                                                 p->ip, ip, p->port);
 917                                 }
 918
 919                                 SAFE_FREE(source_addr);
 920
 921                                 break;
 922                         }
 923
 924                 /* Announce change to UAS or SAM.  Send by the domain controller when a
 925                 replication event is required. */
 926
 927                 case NETLOGON_ANNOUNCE_UAS:
 928                         DEBUG(5, ("Got NETLOGON_ANNOUNCE_UAS\n"));
 929                         break;
 930
 931                 default:
 932                         DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
 933                         return;
 934         }
 935 }