source3/libsmb/clidfs.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client connect/disconnect routines
   4    Copyright (C) Andrew Tridgell                  1994-1998
   5    Copyright (C) Gerald (Jerry) Carter            2004
   6    Copyright (C) Jeremy Allison                   2007-2009
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23
  24 /********************************************************************
  25  Important point.
  26
  27  DFS paths are *always* of the form \server\share\<pathname> (the \ characters
  28  are not C escaped here).
  29
  30  - but if we're using POSIX paths then <pathname> may contain
  31    '/' separators, not '\\' separators. So cope with '\\' or '/'
  32    as a separator when looking at the pathname part.... JRA.
  33 ********************************************************************/
  34
  35 /********************************************************************
  36  Ensure a connection is encrypted.
  37 ********************************************************************/
  38
  39 NTSTATUS cli_cm_force_encryption(struct cli_state *c,
  40                         const char *username,
  41                         const char *password,
  42                         const char *domain,
  43                         const char *sharename)
  44 {
  45         NTSTATUS status = cli_force_encryption(c,
  46                                         username,
  47                                         password,
  48                                         domain);
  49
  50         if (NT_STATUS_EQUAL(status,NT_STATUS_NOT_SUPPORTED)) {
  51                 d_printf("Encryption required and "
  52                         "server that doesn't support "
  53                         "UNIX extensions - failing connect\n");
  54         } else if (NT_STATUS_EQUAL(status,NT_STATUS_UNKNOWN_REVISION)) {
  55                 d_printf("Encryption required and "
  56                         "can't get UNIX CIFS extensions "
  57                         "version from server.\n");
  58         } else if (NT_STATUS_EQUAL(status,NT_STATUS_UNSUPPORTED_COMPRESSION)) {
  59                 d_printf("Encryption required and "
  60                         "share %s doesn't support "
  61                         "encryption.\n", sharename);
  62         } else if (!NT_STATUS_IS_OK(status)) {
  63                 d_printf("Encryption required and "
  64                         "setup failed with error %s.\n",
  65                         nt_errstr(status));
  66         }
  67
  68         return status;
  69 }
  70
  71 /********************************************************************
  72  Return a connection to a server.
  73 ********************************************************************/
  74
  75 static struct cli_state *do_connect(TALLOC_CTX *ctx,
  76                                         const char *server,
  77                                         const char *share,
  78                                         const struct user_auth_info *auth_info,
  79                                         bool show_sessetup,
  80                                         bool force_encrypt,
  81                                         int max_protocol,
  82                                         int port,
  83                                         int name_type)
  84 {
  85         struct cli_state *c = NULL;
  86         struct nmb_name called, calling;
  87         const char *called_str;
  88         const char *server_n;
  89         struct sockaddr_storage ss;
  90         char *servicename;
  91         char *sharename;
  92         char *newserver, *newshare;
  93         const char *username;
  94         const char *password;
  95         NTSTATUS status;
  96
  97         /* make a copy so we don't modify the global string 'service' */
  98         servicename = talloc_strdup(ctx,share);
  99         if (!servicename) {
 100                 return NULL;
 101         }
 102         sharename = servicename;
 103         if (*sharename == '\\') {
 104                 sharename += 2;
 105                 called_str = sharename;
 106                 if (server == NULL) {
 107                         server = sharename;
 108                 }
 109                 sharename = strchr_m(sharename,'\\');
 110                 if (!sharename) {
 111                         return NULL;
 112                 }
 113                 *sharename = 0;
 114                 sharename++;
 115         } else {
 116                 called_str = server;
 117         }
 118
 119         server_n = server;
 120
 121         zero_sockaddr(&ss);
 122
 123         make_nmb_name(&calling, global_myname(), 0x0);
 124         make_nmb_name(&called , called_str, name_type);
 125
 126  again:
 127         zero_sockaddr(&ss);
 128
 129         /* have to open a new connection */
 130         if (!(c=cli_initialise_ex(get_cmdline_auth_info_signing_state(auth_info)))) {
 131                 d_printf("Connection to %s failed\n", server_n);
 132                 if (c) {
 133                         cli_shutdown(c);
 134                 }
 135                 return NULL;
 136         }
 137         if (port) {
 138                 cli_set_port(c, port);
 139         }
 140
 141         status = cli_connect(c, server_n, &ss);
 142         if (!NT_STATUS_IS_OK(status)) {
 143                 d_printf("Connection to %s failed (Error %s)\n",
 144                                 server_n,
 145                                 nt_errstr(status));
 146                 cli_shutdown(c);
 147                 return NULL;
 148         }
 149
 150         if (max_protocol == 0) {
 151                 max_protocol = PROTOCOL_NT1;
 152         }
 153         c->protocol = max_protocol;
 154         c->use_kerberos = get_cmdline_auth_info_use_kerberos(auth_info);
 155         c->fallback_after_kerberos =
 156                 get_cmdline_auth_info_fallback_after_kerberos(auth_info);
 157         c->use_ccache = get_cmdline_auth_info_use_ccache(auth_info);
 158
 159         if (!cli_session_request(c, &calling, &called)) {
 160                 char *p;
 161                 d_printf("session request to %s failed (%s)\n",
 162                          called.name, cli_errstr(c));
 163                 cli_shutdown(c);
 164                 c = NULL;
 165                 if ((p=strchr_m(called.name, '.'))) {
 166                         *p = 0;
 167                         goto again;
 168                 }
 169                 if (strcmp(called.name, "*SMBSERVER")) {
 170                         make_nmb_name(&called , "*SMBSERVER", 0x20);
 171                         goto again;
 172                 }
 173                 return NULL;
 174         }
 175
 176         DEBUG(4,(" session request ok\n"));
 177
 178         status = cli_negprot(c);
 179
 180         if (!NT_STATUS_IS_OK(status)) {
 181                 d_printf("protocol negotiation failed: %s\n",
 182                          nt_errstr(status));
 183                 cli_shutdown(c);
 184                 return NULL;
 185         }
 186
 187         username = get_cmdline_auth_info_username(auth_info);
 188         password = get_cmdline_auth_info_password(auth_info);
 189
 190         if (!NT_STATUS_IS_OK(cli_session_setup(c, username,
 191                                                password, strlen(password),
 192                                                password, strlen(password),
 193                                                lp_workgroup()))) {
 194                 /* If a password was not supplied then
 195                  * try again with a null username. */
 196                 if (password[0] || !username[0] ||
 197                         get_cmdline_auth_info_use_kerberos(auth_info) ||
 198                         !NT_STATUS_IS_OK(cli_session_setup(c, "",
 199                                                 "", 0,
 200                                                 "", 0,
 201                                                lp_workgroup()))) {
 202                         d_printf("session setup failed: %s\n", cli_errstr(c));
 203                         if (NT_STATUS_V(cli_nt_error(c)) ==
 204                             NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
 205                                 d_printf("did you forget to run kinit?\n");
 206                         cli_shutdown(c);
 207                         return NULL;
 208                 }
 209                 d_printf("Anonymous login successful\n");
 210                 status = cli_init_creds(c, "", lp_workgroup(), "");
 211         } else {
 212                 status = cli_init_creds(c, username, lp_workgroup(), password);
 213         }
 214
 215         if (!NT_STATUS_IS_OK(status)) {
 216                 DEBUG(10,("cli_init_creds() failed: %s\n", nt_errstr(status)));
 217                 cli_shutdown(c);
 218                 return NULL;
 219         }
 220
 221         if ( show_sessetup ) {
 222                 if (*c->server_domain) {
 223                         DEBUG(0,("Domain=[%s] OS=[%s] Server=[%s]\n",
 224                                 c->server_domain,c->server_os,c->server_type));
 225                 } else if (*c->server_os || *c->server_type) {
 226                         DEBUG(0,("OS=[%s] Server=[%s]\n",
 227                                  c->server_os,c->server_type));
 228                 }
 229         }
 230         DEBUG(4,(" session setup ok\n"));
 231
 232         /* here's the fun part....to support 'msdfs proxy' shares
 233            (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
 234            here before trying to connect to the original share.
 235            cli_check_msdfs_proxy() will fail if it is a normal share. */
 236
 237         if ((c->capabilities & CAP_DFS) &&
 238                         cli_check_msdfs_proxy(ctx, c, sharename,
 239                                 &newserver, &newshare,
 240                                 force_encrypt,
 241                                 username,
 242                                 password,
 243                                 lp_workgroup())) {
 244                 cli_shutdown(c);
 245                 return do_connect(ctx, newserver,
 246                                 newshare, auth_info, false,
 247                                 force_encrypt, max_protocol,
 248                                 port, name_type);
 249         }
 250
 251         /* must be a normal share */
 252
 253         status = cli_tcon_andx(c, sharename, "?????",
 254                                password, strlen(password)+1);
 255         if (!NT_STATUS_IS_OK(status)) {
 256                 d_printf("tree connect failed: %s\n", nt_errstr(status));
 257                 cli_shutdown(c);
 258                 return NULL;
 259         }
 260
 261         if (force_encrypt) {
 262                 status = cli_cm_force_encryption(c,
 263                                         username,
 264                                         password,
 265                                         lp_workgroup(),
 266                                         sharename);
 267                 if (!NT_STATUS_IS_OK(status)) {
 268                         cli_shutdown(c);
 269                         return NULL;
 270                 }
 271         }
 272
 273         DEBUG(4,(" tconx ok\n"));
 274         return c;
 275 }
 276
 277 /****************************************************************************
 278 ****************************************************************************/
 279
 280 static void cli_set_mntpoint(struct cli_state *cli, const char *mnt)
 281 {
 282         char *name = clean_name(NULL, mnt);
 283         if (!name) {
 284                 return;
 285         }
 286         TALLOC_FREE(cli->dfs_mountpoint);
 287         cli->dfs_mountpoint = talloc_strdup(cli, name);
 288         TALLOC_FREE(name);
 289 }
 290
 291 /********************************************************************
 292  Add a new connection to the list.
 293  referring_cli == NULL means a new initial connection.
 294 ********************************************************************/
 295
 296 static struct cli_state *cli_cm_connect(TALLOC_CTX *ctx,
 297                                         struct cli_state *referring_cli,
 298                                         const char *server,
 299                                         const char *share,
 300                                         const struct user_auth_info *auth_info,
 301                                         bool show_hdr,
 302                                         bool force_encrypt,
 303                                         int max_protocol,
 304                                         int port,
 305                                         int name_type)
 306 {
 307         struct cli_state *cli;
 308
 309         cli = do_connect(ctx, server, share,
 310                                 auth_info,
 311                                 show_hdr, force_encrypt, max_protocol,
 312                                 port, name_type);
 313
 314         if (!cli ) {
 315                 return NULL;
 316         }
 317
 318         /* Enter into the list. */
 319         if (referring_cli) {
 320                 DLIST_ADD_END(referring_cli, cli, struct cli_state *);
 321         }
 322
 323         if (referring_cli && referring_cli->posix_capabilities) {
 324                 uint16 major, minor;
 325                 uint32 caplow, caphigh;
 326                 NTSTATUS status;
 327                 status = cli_unix_extensions_version(cli, &major, &minor,
 328                                                      &caplow, &caphigh);
 329                 if (NT_STATUS_IS_OK(status)) {
 330                         cli_set_unix_extensions_capabilities(cli,
 331                                         major, minor,
 332                                         caplow, caphigh);
 333                 }
 334         }
 335
 336         return cli;
 337 }
 338
 339 /********************************************************************
 340  Return a connection to a server on a particular share.
 341 ********************************************************************/
 342
 343 static struct cli_state *cli_cm_find(struct cli_state *cli,
 344                                 const char *server,
 345                                 const char *share)
 346 {
 347         struct cli_state *p;
 348
 349         if (cli == NULL) {
 350                 return NULL;
 351         }
 352
 353         /* Search to the start of the list. */
 354         for (p = cli; p; p = DLIST_PREV(p)) {
 355                 if (strequal(server, p->desthost) &&
 356                                 strequal(share,p->share)) {
 357                         return p;
 358                 }
 359         }
 360
 361         /* Search to the end of the list. */
 362         for (p = cli->next; p; p = p->next) {
 363                 if (strequal(server, p->desthost) &&
 364                                 strequal(share,p->share)) {
 365                         return p;
 366                 }
 367         }
 368
 369         return NULL;
 370 }
 371
 372 /****************************************************************************
 373  Open a client connection to a \\server\share.
 374 ****************************************************************************/
 375
 376 struct cli_state *cli_cm_open(TALLOC_CTX *ctx,
 377                                 struct cli_state *referring_cli,
 378                                 const char *server,
 379                                 const char *share,
 380                                 const struct user_auth_info *auth_info,
 381                                 bool show_hdr,
 382                                 bool force_encrypt,
 383                                 int max_protocol,
 384                                 int port,
 385                                 int name_type)
 386 {
 387         /* Try to reuse an existing connection in this list. */
 388         struct cli_state *c = cli_cm_find(referring_cli, server, share);
 389
 390         if (c) {
 391                 return c;
 392         }
 393
 394         if (auth_info == NULL) {
 395                 /* Can't do a new connection
 396                  * without auth info. */
 397                 d_printf("cli_cm_open() Unable to open connection [\\%s\\%s] "
 398                         "without auth info\n",
 399                         server, share );
 400                 return NULL;
 401         }
 402
 403         return cli_cm_connect(ctx,
 404                                 referring_cli,
 405                                 server,
 406                                 share,
 407                                 auth_info,
 408                                 show_hdr,
 409                                 force_encrypt,
 410                                 max_protocol,
 411                                 port,
 412                                 name_type);
 413 }
 414
 415 /****************************************************************************
 416 ****************************************************************************/
 417
 418 void cli_cm_display(const struct cli_state *cli)
 419 {
 420         int i;
 421
 422         for (i=0; cli; cli = cli->next,i++ ) {
 423                 d_printf("%d:\tserver=%s, share=%s\n",
 424                         i, cli->desthost, cli->share );
 425         }
 426 }
 427
 428 /****************************************************************************
 429 ****************************************************************************/
 430
 431 /****************************************************************************
 432 ****************************************************************************/
 433
 434 #if 0
 435 void cli_cm_set_credentials(struct user_auth_info *auth_info)
 436 {
 437         SAFE_FREE(cm_creds.username);
 438         cm_creds.username = SMB_STRDUP(get_cmdline_auth_info_username(
 439                                                auth_info));
 440
 441         if (get_cmdline_auth_info_got_pass(auth_info)) {
 442                 cm_set_password(get_cmdline_auth_info_password(auth_info));
 443         }
 444
 445         cm_creds.use_kerberos = get_cmdline_auth_info_use_kerberos(auth_info);
 446         cm_creds.fallback_after_kerberos = false;
 447         cm_creds.signing_state = get_cmdline_auth_info_signing_state(auth_info);
 448 }
 449 #endif
 450
 451 /**********************************************************************
 452  split a dfs path into the server, share name, and extrapath components
 453 **********************************************************************/
 454
 455 static void split_dfs_path(TALLOC_CTX *ctx,
 456                                 const char *nodepath,
 457                                 char **pp_server,
 458                                 char **pp_share,
 459                                 char **pp_extrapath)
 460 {
 461         char *p, *q;
 462         char *path;
 463
 464         *pp_server = NULL;
 465         *pp_share = NULL;
 466         *pp_extrapath = NULL;
 467
 468         path = talloc_strdup(ctx, nodepath);
 469         if (!path) {
 470                 return;
 471         }
 472
 473         if ( path[0] != '\\' ) {
 474                 return;
 475         }
 476
 477         p = strchr_m( path + 1, '\\' );
 478         if ( !p ) {
 479                 return;
 480         }
 481
 482         *p = '\0';
 483         p++;
 484
 485         /* Look for any extra/deep path */
 486         q = strchr_m(p, '\\');
 487         if (q != NULL) {
 488                 *q = '\0';
 489                 q++;
 490                 *pp_extrapath = talloc_strdup(ctx, q);
 491         } else {
 492                 *pp_extrapath = talloc_strdup(ctx, "");
 493         }
 494
 495         *pp_share = talloc_strdup(ctx, p);
 496         *pp_server = talloc_strdup(ctx, &path[1]);
 497 }
 498
 499 /****************************************************************************
 500  Return the original path truncated at the directory component before
 501  the first wildcard character. Trust the caller to provide a NULL
 502  terminated string
 503 ****************************************************************************/
 504
 505 static char *clean_path(TALLOC_CTX *ctx, const char *path)
 506 {
 507         size_t len;
 508         char *p1, *p2, *p;
 509         char *path_out;
 510
 511         /* No absolute paths. */
 512         while (IS_DIRECTORY_SEP(*path)) {
 513                 path++;
 514         }
 515
 516         path_out = talloc_strdup(ctx, path);
 517         if (!path_out) {
 518                 return NULL;
 519         }
 520
 521         p1 = strchr_m(path_out, '*');
 522         p2 = strchr_m(path_out, '?');
 523
 524         if (p1 || p2) {
 525                 if (p1 && p2) {
 526                         p = MIN(p1,p2);
 527                 } else if (!p1) {
 528                         p = p2;
 529                 } else {
 530                         p = p1;
 531                 }
 532                 *p = '\0';
 533
 534                 /* Now go back to the start of this component. */
 535                 p1 = strrchr_m(path_out, '/');
 536                 p2 = strrchr_m(path_out, '\\');
 537                 p = MAX(p1,p2);
 538                 if (p) {
 539                         *p = '\0';
 540                 }
 541         }
 542
 543         /* Strip any trailing separator */
 544
 545         len = strlen(path_out);
 546         if ( (len > 0) && IS_DIRECTORY_SEP(path_out[len-1])) {
 547                 path_out[len-1] = '\0';
 548         }
 549
 550         return path_out;
 551 }
 552
 553 /****************************************************************************
 554 ****************************************************************************/
 555
 556 static char *cli_dfs_make_full_path(TALLOC_CTX *ctx,
 557                                         struct cli_state *cli,
 558                                         const char *dir)
 559 {
 560         char path_sep = '\\';
 561
 562         /* Ensure the extrapath doesn't start with a separator. */
 563         while (IS_DIRECTORY_SEP(*dir)) {
 564                 dir++;
 565         }
 566
 567         if (cli->posix_capabilities & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
 568                 path_sep = '/';
 569         }
 570         return talloc_asprintf(ctx, "%c%s%c%s%c%s",
 571                         path_sep,
 572                         cli->desthost,
 573                         path_sep,
 574                         cli->share,
 575                         path_sep,
 576                         dir);
 577 }
 578
 579 /********************************************************************
 580  check for dfs referral
 581 ********************************************************************/
 582
 583 static bool cli_dfs_check_error( struct cli_state *cli, NTSTATUS status )
 584 {
 585         uint32 flgs2 = SVAL(cli->inbuf,smb_flg2);
 586
 587         /* only deal with DS when we negotiated NT_STATUS codes and UNICODE */
 588
 589         if (!((flgs2&FLAGS2_32_BIT_ERROR_CODES) &&
 590                                 (flgs2&FLAGS2_UNICODE_STRINGS)))
 591                 return false;
 592
 593         if (NT_STATUS_EQUAL(status, NT_STATUS(IVAL(cli->inbuf,smb_rcls))))
 594                 return true;
 595
 596         return false;
 597 }
 598
 599 /********************************************************************
 600  Get the dfs referral link.
 601 ********************************************************************/
 602
 603 bool cli_dfs_get_referral(TALLOC_CTX *ctx,
 604                         struct cli_state *cli,
 605                         const char *path,
 606                         struct client_dfs_referral **refs,
 607                         size_t *num_refs,
 608                         size_t *consumed)
 609 {
 610         unsigned int data_len = 0;
 611         unsigned int param_len = 0;
 612         uint16 setup = TRANSACT2_GET_DFS_REFERRAL;
 613         char *param = NULL;
 614         char *rparam=NULL, *rdata=NULL;
 615         char *p;
 616         char *endp;
 617         size_t pathlen = 2*(strlen(path)+1);
 618         smb_ucs2_t *path_ucs;
 619         char *consumed_path = NULL;
 620         uint16_t consumed_ucs;
 621         uint16 num_referrals;
 622         struct client_dfs_referral *referrals = NULL;
 623         bool ret = false;
 624
 625         *num_refs = 0;
 626         *refs = NULL;
 627
 628         param = SMB_MALLOC_ARRAY(char, 2+pathlen+2);
 629         if (!param) {
 630                 goto out;
 631         }
 632         SSVAL(param, 0, 0x03);  /* max referral level */
 633         p = &param[2];
 634
 635         path_ucs = (smb_ucs2_t *)p;
 636         p += clistr_push(cli, p, path, pathlen, STR_TERMINATE);
 637         param_len = PTR_DIFF(p, param);
 638
 639         if (!cli_send_trans(cli, SMBtrans2,
 640                         NULL,                        /* name */
 641                         -1, 0,                          /* fid, flags */
 642                         &setup, 1, 0,                   /* setup, length, max */
 643                         param, param_len, 2,            /* param, length, max */
 644                         NULL, 0, cli->max_xmit /* data, length, max */
 645                         )) {
 646                 goto out;
 647         }
 648
 649         if (!cli_receive_trans(cli, SMBtrans2,
 650                 &rparam, &param_len,
 651                 &rdata, &data_len)) {
 652                 goto out;
 653         }
 654
 655         if (data_len < 4) {
 656                 goto out;
 657         }
 658
 659         endp = rdata + data_len;
 660
 661         consumed_ucs  = SVAL(rdata, 0);
 662         num_referrals = SVAL(rdata, 2);
 663
 664         /* consumed_ucs is the number of bytes
 665          * of the UCS2 path consumed not counting any
 666          * terminating null. We need to convert
 667          * back to unix charset and count again
 668          * to get the number of bytes consumed from
 669          * the incoming path. */
 670
 671         if (pull_string_talloc(talloc_tos(),
 672                         NULL,
 673                         0,
 674                         &consumed_path,
 675                         path_ucs,
 676                         consumed_ucs,
 677                         STR_UNICODE) == 0) {
 678                 goto out;
 679         }
 680         if (consumed_path == NULL) {
 681                 goto out;
 682         }
 683         *consumed = strlen(consumed_path);
 684
 685         if (num_referrals != 0) {
 686                 uint16 ref_version;
 687                 uint16 ref_size;
 688                 int i;
 689                 uint16 node_offset;
 690
 691                 referrals = talloc_array(ctx, struct client_dfs_referral,
 692                                          num_referrals);
 693
 694                 if (!referrals) {
 695                         goto out;
 696                 }
 697                 /* start at the referrals array */
 698
 699                 p = rdata+8;
 700                 for (i=0; i<num_referrals && p < endp; i++) {
 701                         if (p + 18 > endp) {
 702                                 goto out;
 703                         }
 704                         ref_version = SVAL(p, 0);
 705                         ref_size    = SVAL(p, 2);
 706                         node_offset = SVAL(p, 16);
 707
 708                         if (ref_version != 3) {
 709                                 p += ref_size;
 710                                 continue;
 711                         }
 712
 713                         referrals[i].proximity = SVAL(p, 8);
 714                         referrals[i].ttl       = SVAL(p, 10);
 715
 716                         if (p + node_offset > endp) {
 717                                 goto out;
 718                         }
 719                         clistr_pull_talloc(ctx, cli->inbuf,
 720                                            &referrals[i].dfspath,
 721                                            p+node_offset, -1,
 722                                            STR_TERMINATE|STR_UNICODE);
 723
 724                         if (!referrals[i].dfspath) {
 725                                 goto out;
 726                         }
 727                         p += ref_size;
 728                 }
 729                 if (i < num_referrals) {
 730                         goto out;
 731                 }
 732         }
 733
 734         ret = true;
 735
 736         *num_refs = num_referrals;
 737         *refs = referrals;
 738
 739   out:
 740
 741         TALLOC_FREE(consumed_path);
 742         SAFE_FREE(param);
 743         SAFE_FREE(rdata);
 744         SAFE_FREE(rparam);
 745         return ret;
 746 }
 747
 748 /********************************************************************
 749 ********************************************************************/
 750
 751 bool cli_resolve_path(TALLOC_CTX *ctx,
 752                         const char *mountpt,
 753                         const struct user_auth_info *dfs_auth_info,
 754                         struct cli_state *rootcli,
 755                         const char *path,
 756                         struct cli_state **targetcli,
 757                         char **pp_targetpath)
 758 {
 759         struct client_dfs_referral *refs = NULL;
 760         size_t num_refs = 0;
 761         size_t consumed = 0;
 762         struct cli_state *cli_ipc = NULL;
 763         char *dfs_path = NULL;
 764         char *cleanpath = NULL;
 765         char *extrapath = NULL;
 766         int pathlen;
 767         char *server = NULL;
 768         char *share = NULL;
 769         struct cli_state *newcli = NULL;
 770         char *newpath = NULL;
 771         char *newmount = NULL;
 772         char *ppath = NULL;
 773         SMB_STRUCT_STAT sbuf;
 774         uint32 attributes;
 775         NTSTATUS status;
 776
 777         if ( !rootcli || !path || !targetcli ) {
 778                 return false;
 779         }
 780
 781         /* Don't do anything if this is not a DFS root. */
 782
 783         if ( !rootcli->dfsroot) {
 784                 *targetcli = rootcli;
 785                 *pp_targetpath = talloc_strdup(ctx, path);
 786                 if (!*pp_targetpath) {
 787                         return false;
 788                 }
 789                 return true;
 790         }
 791
 792         *targetcli = NULL;
 793
 794         /* Send a trans2_query_path_info to check for a referral. */
 795
 796         cleanpath = clean_path(ctx, path);
 797         if (!cleanpath) {
 798                 return false;
 799         }
 800
 801         dfs_path = cli_dfs_make_full_path(ctx, rootcli, cleanpath);
 802         if (!dfs_path) {
 803                 return false;
 804         }
 805
 806         status = cli_qpathinfo_basic( rootcli, dfs_path, &sbuf, &attributes);
 807         if (NT_STATUS_IS_OK(status)) {
 808                 /* This is an ordinary path, just return it. */
 809                 *targetcli = rootcli;
 810                 *pp_targetpath = talloc_strdup(ctx, path);
 811                 if (!*pp_targetpath) {
 812                         return false;
 813                 }
 814                 goto done;
 815         }
 816
 817         /* Special case where client asked for a path that does not exist */
 818
 819         if (cli_dfs_check_error(rootcli, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 820                 *targetcli = rootcli;
 821                 *pp_targetpath = talloc_strdup(ctx, path);
 822                 if (!*pp_targetpath) {
 823                         return false;
 824                 }
 825                 goto done;
 826         }
 827
 828         /* We got an error, check for DFS referral. */
 829
 830         if (!cli_dfs_check_error(rootcli, NT_STATUS_PATH_NOT_COVERED)) {
 831                 return false;
 832         }
 833
 834         /* Check for the referral. */
 835
 836         if (!(cli_ipc = cli_cm_open(ctx,
 837                                 rootcli,
 838                                 rootcli->desthost,
 839                                 "IPC$",
 840                                 dfs_auth_info,
 841                                 false,
 842                                 (rootcli->trans_enc_state != NULL),
 843                                 rootcli->protocol,
 844                                 0,
 845                                 0x20))) {
 846                 return false;
 847         }
 848
 849         if (!cli_dfs_get_referral(ctx, cli_ipc, dfs_path, &refs,
 850                         &num_refs, &consumed) || !num_refs) {
 851                 return false;
 852         }
 853
 854         /* Just store the first referral for now. */
 855
 856         if (!refs[0].dfspath) {
 857                 return false;
 858         }
 859         split_dfs_path(ctx, refs[0].dfspath, &server, &share, &extrapath );
 860
 861         if (!server || !share) {
 862                 return false;
 863         }
 864
 865         /* Make sure to recreate the original string including any wildcards. */
 866
 867         dfs_path = cli_dfs_make_full_path(ctx, rootcli, path);
 868         if (!dfs_path) {
 869                 return false;
 870         }
 871         pathlen = strlen(dfs_path);
 872         consumed = MIN(pathlen, consumed);
 873         *pp_targetpath = talloc_strdup(ctx, &dfs_path[consumed]);
 874         if (!*pp_targetpath) {
 875                 return false;
 876         }
 877         dfs_path[consumed] = '\0';
 878
 879         /*
 880          * *pp_targetpath is now the unconsumed part of the path.
 881          * dfs_path is now the consumed part of the path
 882          * (in \server\share\path format).
 883          */
 884
 885         /* Open the connection to the target server & share */
 886         if ((*targetcli = cli_cm_open(ctx, rootcli,
 887                                         server,
 888                                         share,
 889                                         dfs_auth_info,
 890                                         false,
 891                                         (rootcli->trans_enc_state != NULL),
 892                                         rootcli->protocol,
 893                                         0,
 894                                         0x20)) == NULL) {
 895                 d_printf("Unable to follow dfs referral [\\%s\\%s]\n",
 896                         server, share );
 897                 return false;
 898         }
 899
 900         if (extrapath && strlen(extrapath) > 0) {
 901                 *pp_targetpath = talloc_asprintf(ctx,
 902                                                 "%s%s",
 903                                                 extrapath,
 904                                                 *pp_targetpath);
 905                 if (!*pp_targetpath) {
 906                         return false;
 907                 }
 908         }
 909
 910         /* parse out the consumed mount path */
 911         /* trim off the \server\share\ */
 912
 913         ppath = dfs_path;
 914
 915         if (*ppath != '\\') {
 916                 d_printf("cli_resolve_path: "
 917                         "dfs_path (%s) not in correct format.\n",
 918                         dfs_path );
 919                 return false;
 920         }
 921
 922         ppath++; /* Now pointing at start of server name. */
 923
 924         if ((ppath = strchr_m( dfs_path, '\\' )) == NULL) {
 925                 return false;
 926         }
 927
 928         ppath++; /* Now pointing at start of share name. */
 929
 930         if ((ppath = strchr_m( ppath+1, '\\' )) == NULL) {
 931                 return false;
 932         }
 933
 934         ppath++; /* Now pointing at path component. */
 935
 936         newmount = talloc_asprintf(ctx, "%s\\%s", mountpt, ppath );
 937         if (!newmount) {
 938                 return false;
 939         }
 940
 941         cli_set_mntpoint(*targetcli, newmount);
 942
 943         /* Check for another dfs referral, note that we are not
 944            checking for loops here. */
 945
 946         if (!strequal(*pp_targetpath, "\\") && !strequal(*pp_targetpath, "/")) {
 947                 if (cli_resolve_path(ctx,
 948                                         newmount,
 949                                         dfs_auth_info,
 950                                         *targetcli,
 951                                         *pp_targetpath,
 952                                         &newcli,
 953                                         &newpath)) {
 954                         /*
 955                          * When cli_resolve_path returns true here it's always
 956                          * returning the complete path in newpath, so we're done
 957                          * here.
 958                          */
 959                         *targetcli = newcli;
 960                         *pp_targetpath = newpath;
 961                         return true;
 962                 }
 963         }
 964
 965   done:
 966
 967         /* If returning true ensure we return a dfs root full path. */
 968         if ((*targetcli)->dfsroot) {
 969                 dfs_path = talloc_strdup(ctx, *pp_targetpath);
 970                 if (!dfs_path) {
 971                         return false;
 972                 }
 973                 *pp_targetpath = cli_dfs_make_full_path(ctx, *targetcli, dfs_path);
 974         }
 975
 976         return true;
 977 }
 978
 979 /********************************************************************
 980 ********************************************************************/
 981
 982 bool cli_check_msdfs_proxy(TALLOC_CTX *ctx,
 983                                 struct cli_state *cli,
 984                                 const char *sharename,
 985                                 char **pp_newserver,
 986                                 char **pp_newshare,
 987                                 bool force_encrypt,
 988                                 const char *username,
 989                                 const char *password,
 990                                 const char *domain)
 991 {
 992         struct client_dfs_referral *refs = NULL;
 993         size_t num_refs = 0;
 994         size_t consumed = 0;
 995         char *fullpath = NULL;
 996         bool res;
 997         uint16 cnum;
 998         char *newextrapath = NULL;
 999         NTSTATUS status;
1000
1001         if (!cli || !sharename) {
1002                 return false;
1003         }
1004
1005         cnum = cli->cnum;
1006
1007         /* special case.  never check for a referral on the IPC$ share */
1008
1009         if (strequal(sharename, "IPC$")) {
1010                 return false;
1011         }
1012
1013         /* send a trans2_query_path_info to check for a referral */
1014
1015         fullpath = talloc_asprintf(ctx, "\\%s\\%s", cli->desthost, sharename );
1016         if (!fullpath) {
1017                 return false;
1018         }
1019
1020         /* check for the referral */
1021
1022         if (!NT_STATUS_IS_OK(cli_tcon_andx(cli, "IPC$", "IPC", NULL, 0))) {
1023                 return false;
1024         }
1025
1026         if (force_encrypt) {
1027                 status = cli_cm_force_encryption(cli,
1028                                         username,
1029                                         password,
1030                                         lp_workgroup(),
1031                                         "IPC$");
1032                 if (!NT_STATUS_IS_OK(status)) {
1033                         return false;
1034                 }
1035         }
1036
1037         res = cli_dfs_get_referral(ctx, cli, fullpath, &refs, &num_refs, &consumed);
1038
1039         status = cli_tdis(cli);
1040         if (!NT_STATUS_IS_OK(status)) {
1041                 return false;
1042         }
1043
1044         cli->cnum = cnum;
1045
1046         if (!res || !num_refs) {
1047                 return false;
1048         }
1049
1050         if (!refs[0].dfspath) {
1051                 return false;
1052         }
1053
1054         split_dfs_path(ctx, refs[0].dfspath, pp_newserver,
1055                         pp_newshare, &newextrapath );
1056
1057         if ((*pp_newserver == NULL) || (*pp_newshare == NULL)) {
1058                 return false;
1059         }
1060
1061         /* check that this is not a self-referral */
1062
1063         if (strequal(cli->desthost, *pp_newserver) &&
1064                         strequal(sharename, *pp_newshare)) {
1065                 return false;
1066         }
1067
1068         return true;
1069 }