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