source3/libsmb/libsmb_context.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    SMB client library implementation
   4    Copyright (C) Andrew Tridgell 1998
   5    Copyright (C) Richard Sharpe 2000, 2002
   6    Copyright (C) John Terpstra 2000
   7    Copyright (C) Tom Jansen (Ninja ISD) 2002
   8    Copyright (C) Derrell Lipman 2003-2008
   9    Copyright (C) Jeremy Allison 2007, 2008
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "libsmb/libsmb.h"
  27 #include "libsmbclient.h"
  28 #include "libsmb_internal.h"
  29 #include "secrets.h"
  30 #include "../libcli/smb/smbXcli_base.h"
  31
  32 /*
  33  * Is the logging working / configfile read ?
  34  */
  35 static bool SMBC_initialized = false;
  36 static unsigned int initialized_ctx_count = 0;
  37 static void *initialized_ctx_count_mutex = NULL;
  38
  39 /*
  40  * Do some module- and library-wide intializations
  41  */
  42 static void
  43 SMBC_module_init(void * punused)
  44 {
  45     bool conf_loaded = False;
  46     char *home = NULL;
  47     TALLOC_CTX *frame = talloc_stackframe();
  48
  49     setup_logging("libsmbclient", DEBUG_STDOUT);
  50
  51     /* Here we would open the smb.conf file if needed ... */
  52
  53     home = getenv("HOME");
  54     if (home) {
  55         char *conf = NULL;
  56         if (asprintf(&conf, "%s/.smb/smb.conf", home) > 0) {
  57             if (lp_load_client(conf)) {
  58                 conf_loaded = True;
  59             } else {
  60                 DEBUG(5, ("Could not load config file: %s\n",
  61                           conf));
  62             }
  63             SAFE_FREE(conf);
  64         }
  65     }
  66
  67     if (!conf_loaded) {
  68         /*
  69          * Well, if that failed, try the get_dyn_CONFIGFILE
  70          * Which points to the standard locn, and if that
  71          * fails, silently ignore it and use the internal
  72          * defaults ...
  73          */
  74
  75         if (!lp_load_client(get_dyn_CONFIGFILE())) {
  76             DEBUG(5, ("Could not load config file: %s\n",
  77                       get_dyn_CONFIGFILE()));
  78         } else if (home) {
  79             char *conf;
  80             /*
  81              * We loaded the global config file.  Now lets
  82              * load user-specific modifications to the
  83              * global config.
  84              */
  85             if (asprintf(&conf,
  86                          "%s/.smb/smb.conf.append",
  87                          home) > 0) {
  88                 if (!lp_load_client_no_reinit(conf)) {
  89                     DEBUG(10,
  90                           ("Could not append config file: "
  91                            "%s\n",
  92                            conf));
  93                 }
  94                 SAFE_FREE(conf);
  95             }
  96         }
  97     }
  98
  99     load_interfaces();  /* Load the list of interfaces ... */
 100
 101     reopen_logs();  /* Get logging working ... */
 102
 103     /*
 104      * Block SIGPIPE (from lib/util_sock.c: write())
 105      * It is not needed and should not stop execution
 106      */
 107     BlockSignals(True, SIGPIPE);
 108
 109     /* Create the mutex we'll use to protect initialized_ctx_count */
 110     if (SMB_THREAD_CREATE_MUTEX("initialized_ctx_count_mutex",
 111                                 initialized_ctx_count_mutex) != 0) {
 112         smb_panic("SMBC_module_init: "
 113                   "failed to create 'initialized_ctx_count' mutex");
 114     }
 115
 116
 117     TALLOC_FREE(frame);
 118 }
 119
 120
 121 static void
 122 SMBC_module_terminate(void)
 123 {
 124     TALLOC_CTX *frame = talloc_stackframe();
 125     secrets_shutdown();
 126     gfree_all();
 127     SMBC_initialized = false;
 128     TALLOC_FREE(frame);
 129 }
 130
 131
 132 /*
 133  * Get a new empty handle to fill in with your own info
 134  */
 135 SMBCCTX *
 136 smbc_new_context(void)
 137 {
 138         SMBCCTX *context;
 139         TALLOC_CTX *frame = talloc_stackframe();
 140
 141         /* The first call to this function should initialize the module */
 142         SMB_THREAD_ONCE(&SMBC_initialized, SMBC_module_init, NULL);
 143
 144         /*
 145          * All newly added context fields should be placed in
 146          * SMBC_internal_data, not directly in SMBCCTX.
 147          */
 148         context = SMB_MALLOC_P(SMBCCTX);
 149         if (!context) {
 150                 TALLOC_FREE(frame);
 151                 errno = ENOMEM;
 152                 return NULL;
 153         }
 154
 155         ZERO_STRUCTP(context);
 156
 157         context->internal = SMB_MALLOC_P(struct SMBC_internal_data);
 158         if (!context->internal) {
 159                 TALLOC_FREE(frame);
 160                 SAFE_FREE(context);
 161                 errno = ENOMEM;
 162                 return NULL;
 163         }
 164
 165         /* Initialize the context and establish reasonable defaults */
 166         ZERO_STRUCTP(context->internal);
 167
 168         smbc_setDebug(context, 0);
 169         smbc_setTimeout(context, 20000);
 170         smbc_setPort(context, 0);
 171
 172         smbc_setOptionFullTimeNames(context, False);
 173         smbc_setOptionOpenShareMode(context, SMBC_SHAREMODE_DENY_NONE);
 174         smbc_setOptionSmbEncryptionLevel(context, SMBC_ENCRYPTLEVEL_NONE);
 175         smbc_setOptionUseCCache(context, True);
 176         smbc_setOptionCaseSensitive(context, False);
 177         smbc_setOptionBrowseMaxLmbCount(context, 3);    /* # LMBs to query */
 178         smbc_setOptionUrlEncodeReaddirEntries(context, False);
 179         smbc_setOptionOneSharePerServer(context, False);
 180         if (getenv("LIBSMBCLIENT_NO_CCACHE") != NULL) {
 181                 smbc_setOptionUseCCache(context, false);
 182         }
 183
 184         smbc_setFunctionAuthData(context, SMBC_get_auth_data);
 185         smbc_setFunctionCheckServer(context, SMBC_check_server);
 186         smbc_setFunctionRemoveUnusedServer(context, SMBC_remove_unused_server);
 187
 188         smbc_setOptionUserData(context, NULL);
 189         smbc_setFunctionAddCachedServer(context, SMBC_add_cached_server);
 190         smbc_setFunctionGetCachedServer(context, SMBC_get_cached_server);
 191         smbc_setFunctionRemoveCachedServer(context, SMBC_remove_cached_server);
 192         smbc_setFunctionPurgeCachedServers(context, SMBC_purge_cached_servers);
 193
 194         smbc_setFunctionOpen(context, SMBC_open_ctx);
 195         smbc_setFunctionCreat(context, SMBC_creat_ctx);
 196         smbc_setFunctionRead(context, SMBC_read_ctx);
 197         smbc_setFunctionSplice(context, SMBC_splice_ctx);
 198         smbc_setFunctionWrite(context, SMBC_write_ctx);
 199         smbc_setFunctionClose(context, SMBC_close_ctx);
 200         smbc_setFunctionUnlink(context, SMBC_unlink_ctx);
 201         smbc_setFunctionRename(context, SMBC_rename_ctx);
 202         smbc_setFunctionLseek(context, SMBC_lseek_ctx);
 203         smbc_setFunctionFtruncate(context, SMBC_ftruncate_ctx);
 204         smbc_setFunctionStat(context, SMBC_stat_ctx);
 205         smbc_setFunctionStatVFS(context, SMBC_statvfs_ctx);
 206         smbc_setFunctionFstatVFS(context, SMBC_fstatvfs_ctx);
 207         smbc_setFunctionFstat(context, SMBC_fstat_ctx);
 208         smbc_setFunctionOpendir(context, SMBC_opendir_ctx);
 209         smbc_setFunctionClosedir(context, SMBC_closedir_ctx);
 210         smbc_setFunctionReaddir(context, SMBC_readdir_ctx);
 211         smbc_setFunctionGetdents(context, SMBC_getdents_ctx);
 212         smbc_setFunctionMkdir(context, SMBC_mkdir_ctx);
 213         smbc_setFunctionRmdir(context, SMBC_rmdir_ctx);
 214         smbc_setFunctionTelldir(context, SMBC_telldir_ctx);
 215         smbc_setFunctionLseekdir(context, SMBC_lseekdir_ctx);
 216         smbc_setFunctionFstatdir(context, SMBC_fstatdir_ctx);
 217         smbc_setFunctionNotify(context, SMBC_notify_ctx);
 218         smbc_setFunctionChmod(context, SMBC_chmod_ctx);
 219         smbc_setFunctionUtimes(context, SMBC_utimes_ctx);
 220         smbc_setFunctionSetxattr(context, SMBC_setxattr_ctx);
 221         smbc_setFunctionGetxattr(context, SMBC_getxattr_ctx);
 222         smbc_setFunctionRemovexattr(context, SMBC_removexattr_ctx);
 223         smbc_setFunctionListxattr(context, SMBC_listxattr_ctx);
 224
 225         smbc_setFunctionOpenPrintJob(context, SMBC_open_print_job_ctx);
 226         smbc_setFunctionPrintFile(context, SMBC_print_file_ctx);
 227         smbc_setFunctionListPrintJobs(context, SMBC_list_print_jobs_ctx);
 228         smbc_setFunctionUnlinkPrintJob(context, SMBC_unlink_print_job_ctx);
 229
 230         TALLOC_FREE(frame);
 231         return context;
 232 }
 233
 234 /*
 235  * Free a context
 236  *
 237  * Returns 0 on success. Otherwise returns 1, the SMBCCTX is _not_ freed
 238  * and thus you'll be leaking memory if not handled properly.
 239  *
 240  */
 241 int
 242 smbc_free_context(SMBCCTX *context,
 243                   int shutdown_ctx)
 244 {
 245         TALLOC_CTX *frame;
 246         if (!context) {
 247                 errno = EBADF;
 248                 return 1;
 249         }
 250
 251         frame = talloc_stackframe();
 252
 253         if (shutdown_ctx) {
 254                 SMBCFILE * f;
 255                 DEBUG(1,("Performing aggressive shutdown.\n"));
 256
 257                 f = context->internal->files;
 258                 while (f) {
 259                         SMBCFILE *next = f->next;
 260                         smbc_getFunctionClose(context)(context, f);
 261                         f = next;
 262                 }
 263                 context->internal->files = NULL;
 264
 265                 /* First try to remove the servers the nice way. */
 266                 if (smbc_getFunctionPurgeCachedServers(context)(context)) {
 267                         SMBCSRV * s;
 268                         SMBCSRV * next;
 269                         DEBUG(1, ("Could not purge all servers, "
 270                                   "Nice way shutdown failed.\n"));
 271                         s = context->internal->servers;
 272                         while (s) {
 273                                 DEBUG(1, ("Forced shutdown: %p (cli=%p)\n",
 274                                           s, s->cli));
 275                                 cli_shutdown(s->cli);
 276                                 smbc_getFunctionRemoveCachedServer(context)(context,
 277                                                                          s);
 278                                 next = s->next;
 279                                 DLIST_REMOVE(context->internal->servers, s);
 280                                 SAFE_FREE(s);
 281                                 s = next;
 282                         }
 283                         context->internal->servers = NULL;
 284                 }
 285         }
 286         else {
 287                 /* This is the polite way */
 288                 if (smbc_getFunctionPurgeCachedServers(context)(context)) {
 289                         DEBUG(1, ("Could not purge all servers, "
 290                                   "free_context failed.\n"));
 291                         errno = EBUSY;
 292                         TALLOC_FREE(frame);
 293                         return 1;
 294                 }
 295                 if (context->internal->servers) {
 296                         DEBUG(1, ("Active servers in context, "
 297                                   "free_context failed.\n"));
 298                         errno = EBUSY;
 299                         TALLOC_FREE(frame);
 300                         return 1;
 301                 }
 302                 if (context->internal->files) {
 303                         DEBUG(1, ("Active files in context, "
 304                                   "free_context failed.\n"));
 305                         errno = EBUSY;
 306                         TALLOC_FREE(frame);
 307                         return 1;
 308                 }
 309         }
 310
 311         /* Things we have to clean up */
 312         smbc_setWorkgroup(context, NULL);
 313         smbc_setNetbiosName(context, NULL);
 314         smbc_setUser(context, NULL);
 315
 316         DEBUG(3, ("Context %p successfully freed\n", context));
 317
 318         /* Free any DFS auth context. */
 319         TALLOC_FREE(context->internal->auth_info);
 320
 321         SAFE_FREE(context->internal);
 322         SAFE_FREE(context);
 323
 324         /* Protect access to the count of contexts in use */
 325         if (SMB_THREAD_LOCK(initialized_ctx_count_mutex) != 0) {
 326                 smb_panic("error locking 'initialized_ctx_count'");
 327         }
 328
 329         if (initialized_ctx_count) {
 330                 initialized_ctx_count--;
 331         }
 332
 333         if (initialized_ctx_count == 0) {
 334             SMBC_module_terminate();
 335         }
 336
 337         /* Unlock the mutex */
 338         if (SMB_THREAD_UNLOCK(initialized_ctx_count_mutex) != 0) {
 339                 smb_panic("error unlocking 'initialized_ctx_count'");
 340         }
 341
 342         TALLOC_FREE(frame);
 343         return 0;
 344 }
 345
 346
 347 /**
 348  * Deprecated interface.  Do not use.  Instead, use the various
 349  * smbc_setOption*() functions or smbc_setFunctionAuthDataWithContext().
 350  */
 351 void
 352 smbc_option_set(SMBCCTX *context,
 353                 char *option_name,
 354                 ... /* option_value */)
 355 {
 356         va_list ap;
 357         union {
 358                 int i;
 359                 bool b;
 360                 smbc_get_auth_data_with_context_fn auth_fn;
 361                 void *v;
 362                 const char *s;
 363         } option_value;
 364
 365         TALLOC_CTX *frame = talloc_stackframe();
 366
 367         va_start(ap, option_name);
 368
 369         if (strcmp(option_name, "debug_to_stderr") == 0) {
 370                 option_value.b = (bool) va_arg(ap, int);
 371                 smbc_setOptionDebugToStderr(context, option_value.b);
 372
 373         } else if (strcmp(option_name, "full_time_names") == 0) {
 374                 option_value.b = (bool) va_arg(ap, int);
 375                 smbc_setOptionFullTimeNames(context, option_value.b);
 376
 377         } else if (strcmp(option_name, "open_share_mode") == 0) {
 378                 option_value.i = va_arg(ap, int);
 379                 smbc_setOptionOpenShareMode(context, option_value.i);
 380
 381         } else if (strcmp(option_name, "auth_function") == 0) {
 382                 option_value.auth_fn =
 383                         va_arg(ap, smbc_get_auth_data_with_context_fn);
 384                 smbc_setFunctionAuthDataWithContext(context, option_value.auth_fn);
 385
 386         } else if (strcmp(option_name, "user_data") == 0) {
 387                 option_value.v = va_arg(ap, void *);
 388                 smbc_setOptionUserData(context, option_value.v);
 389
 390         } else if (strcmp(option_name, "smb_encrypt_level") == 0) {
 391                 option_value.s = va_arg(ap, const char *);
 392                 if (strcmp(option_value.s, "none") == 0) {
 393                         smbc_setOptionSmbEncryptionLevel(context,
 394                                                          SMBC_ENCRYPTLEVEL_NONE);
 395                 } else if (strcmp(option_value.s, "request") == 0) {
 396                         smbc_setOptionSmbEncryptionLevel(context,
 397                                                          SMBC_ENCRYPTLEVEL_REQUEST);
 398                 } else if (strcmp(option_value.s, "require") == 0) {
 399                         smbc_setOptionSmbEncryptionLevel(context,
 400                                                          SMBC_ENCRYPTLEVEL_REQUIRE);
 401                 }
 402
 403         } else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
 404                 option_value.i = va_arg(ap, int);
 405                 smbc_setOptionBrowseMaxLmbCount(context, option_value.i);
 406
 407         } else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
 408                 option_value.b = (bool) va_arg(ap, int);
 409                 smbc_setOptionUrlEncodeReaddirEntries(context, option_value.b);
 410
 411         } else if (strcmp(option_name, "one_share_per_server") == 0) {
 412                 option_value.b = (bool) va_arg(ap, int);
 413                 smbc_setOptionOneSharePerServer(context, option_value.b);
 414
 415         } else if (strcmp(option_name, "use_kerberos") == 0) {
 416                 option_value.b = (bool) va_arg(ap, int);
 417                 smbc_setOptionUseKerberos(context, option_value.b);
 418
 419         } else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
 420                 option_value.b = (bool) va_arg(ap, int);
 421                 smbc_setOptionFallbackAfterKerberos(context, option_value.b);
 422
 423         } else if (strcmp(option_name, "use_ccache") == 0) {
 424                 option_value.b = (bool) va_arg(ap, int);
 425                 smbc_setOptionUseCCache(context, option_value.b);
 426
 427         } else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
 428                 option_value.b = (bool) va_arg(ap, int);
 429                 smbc_setOptionNoAutoAnonymousLogin(context, option_value.b);
 430         }
 431
 432         va_end(ap);
 433         TALLOC_FREE(frame);
 434 }
 435
 436
 437 /*
 438  * Deprecated interface.  Do not use.  Instead, use the various
 439  * smbc_getOption*() functions.
 440  */
 441 void *
 442 smbc_option_get(SMBCCTX *context,
 443                 char *option_name)
 444 {
 445         if (strcmp(option_name, "debug_stderr") == 0) {
 446 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 447                 return (void *) (intptr_t) smbc_getOptionDebugToStderr(context);
 448 #else
 449                 return (void *) smbc_getOptionDebugToStderr(context);
 450 #endif
 451
 452         } else if (strcmp(option_name, "full_time_names") == 0) {
 453 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 454                 return (void *) (intptr_t) smbc_getOptionFullTimeNames(context);
 455 #else
 456                 return (void *) smbc_getOptionFullTimeNames(context);
 457 #endif
 458
 459         } else if (strcmp(option_name, "open_share_mode") == 0) {
 460 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 461                 return (void *) (intptr_t) smbc_getOptionOpenShareMode(context);
 462 #else
 463                 return (void *) smbc_getOptionOpenShareMode(context);
 464 #endif
 465
 466         } else if (strcmp(option_name, "auth_function") == 0) {
 467                 return (void *) smbc_getFunctionAuthDataWithContext(context);
 468
 469         } else if (strcmp(option_name, "user_data") == 0) {
 470                 return smbc_getOptionUserData(context);
 471
 472         } else if (strcmp(option_name, "smb_encrypt_level") == 0) {
 473                 switch(smbc_getOptionSmbEncryptionLevel(context))
 474                 {
 475                 case 0:
 476                         return discard_const_p(void, "none");
 477                 case 1:
 478                         return discard_const_p(void, "request");
 479                 case 2:
 480                         return discard_const_p(void, "require");
 481                 }
 482
 483         } else if (strcmp(option_name, "smb_encrypt_on") == 0) {
 484                 SMBCSRV *s;
 485                 unsigned int num_servers = 0;
 486
 487                 for (s = context->internal->servers; s; s = s->next) {
 488                         num_servers++;
 489                         if (!smb1cli_conn_encryption_on(s->cli->conn)) {
 490                                 return (void *)false;
 491                         }
 492                 }
 493 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 494                 return (void *) (intptr_t) (bool) (num_servers > 0);
 495 #else
 496                 return (void *) (bool) (num_servers > 0);
 497 #endif
 498
 499         } else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
 500 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 501                 return (void *) (intptr_t) smbc_getOptionBrowseMaxLmbCount(context);
 502 #else
 503                 return (void *) smbc_getOptionBrowseMaxLmbCount(context);
 504 #endif
 505
 506         } else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
 507 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 508                 return (void *)(intptr_t) smbc_getOptionUrlEncodeReaddirEntries(context);
 509 #else
 510                 return (void *) (bool) smbc_getOptionUrlEncodeReaddirEntries(context);
 511 #endif
 512
 513         } else if (strcmp(option_name, "one_share_per_server") == 0) {
 514 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 515                 return (void *) (intptr_t) smbc_getOptionOneSharePerServer(context);
 516 #else
 517                 return (void *) (bool) smbc_getOptionOneSharePerServer(context);
 518 #endif
 519
 520         } else if (strcmp(option_name, "use_kerberos") == 0) {
 521 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 522                 return (void *) (intptr_t) smbc_getOptionUseKerberos(context);
 523 #else
 524                 return (void *) (bool) smbc_getOptionUseKerberos(context);
 525 #endif
 526
 527         } else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
 528 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 529                 return (void *)(intptr_t) smbc_getOptionFallbackAfterKerberos(context);
 530 #else
 531                 return (void *) (bool) smbc_getOptionFallbackAfterKerberos(context);
 532 #endif
 533
 534         } else if (strcmp(option_name, "use_ccache") == 0) {
 535 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 536                 return (void *) (intptr_t) smbc_getOptionUseCCache(context);
 537 #else
 538                 return (void *) (bool) smbc_getOptionUseCCache(context);
 539 #endif
 540
 541         } else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
 542 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 543                 return (void *) (intptr_t) smbc_getOptionNoAutoAnonymousLogin(context);
 544 #else
 545                 return (void *) (bool) smbc_getOptionNoAutoAnonymousLogin(context);
 546 #endif
 547         }
 548
 549         return NULL;
 550 }
 551
 552
 553 /*
 554  * Initialize the library, etc.
 555  *
 556  * We accept a struct containing handle information.
 557  * valid values for info->debug from 0 to 100,
 558  * and insist that info->fn must be non-null.
 559  */
 560 SMBCCTX *
 561 smbc_init_context(SMBCCTX *context)
 562 {
 563         int pid;
 564         TALLOC_CTX *frame;
 565
 566         if (!context) {
 567                 errno = EBADF;
 568                 return NULL;
 569         }
 570
 571         /* Do not initialise the same client twice */
 572         if (context->internal->initialized) {
 573                 return NULL;
 574         }
 575
 576         frame = talloc_stackframe();
 577
 578         if ((!smbc_getFunctionAuthData(context) &&
 579              !smbc_getFunctionAuthDataWithContext(context)) ||
 580             smbc_getDebug(context) < 0 ||
 581             smbc_getDebug(context) > 100) {
 582
 583                 TALLOC_FREE(frame);
 584                 errno = EINVAL;
 585                 return NULL;
 586
 587         }
 588
 589         if (!smbc_getUser(context)) {
 590                 /*
 591                  * FIXME: Is this the best way to get the user info?
 592                  */
 593                 char *user = getenv("USER");
 594                 /* walk around as "guest" if no username can be found */
 595                 if (!user) {
 596                         user = SMB_STRDUP("guest");
 597                 } else {
 598                         user = SMB_STRDUP(user);
 599                 }
 600
 601                 if (!user) {
 602                         TALLOC_FREE(frame);
 603                         errno = ENOMEM;
 604                         return NULL;
 605                 }
 606
 607                 smbc_setUser(context, user);
 608                 SAFE_FREE(user);
 609
 610                 if (!smbc_getUser(context)) {
 611                         TALLOC_FREE(frame);
 612                         errno = ENOMEM;
 613                         return NULL;
 614                 }
 615         }
 616
 617         if (!smbc_getNetbiosName(context)) {
 618                 /*
 619                  * We try to get our netbios name from the config. If that
 620                  * fails we fall back on constructing our netbios name from
 621                  * our hostname etc
 622                  */
 623                 char *netbios_name;
 624                 if (lp_netbios_name()) {
 625                         netbios_name = SMB_STRDUP(lp_netbios_name());
 626                 } else {
 627                         /*
 628                          * Hmmm, I want to get hostname as well, but I am too
 629                          * lazy for the moment
 630                          */
 631                         pid = getpid();
 632                         netbios_name = (char *)SMB_MALLOC(17);
 633                         if (!netbios_name) {
 634                                 TALLOC_FREE(frame);
 635                                 errno = ENOMEM;
 636                                 return NULL;
 637                         }
 638                         slprintf(netbios_name, 16,
 639                                  "smbc%s%d", smbc_getUser(context), pid);
 640                 }
 641
 642                 if (!netbios_name) {
 643                         TALLOC_FREE(frame);
 644                         errno = ENOMEM;
 645                         return NULL;
 646                 }
 647
 648                 smbc_setNetbiosName(context, netbios_name);
 649                 SAFE_FREE(netbios_name);
 650
 651                 if (!smbc_getNetbiosName(context)) {
 652                         TALLOC_FREE(frame);
 653                         errno = ENOMEM;
 654                         return NULL;
 655                 }
 656         }
 657
 658         DEBUG(1, ("Using netbios name %s.\n", smbc_getNetbiosName(context)));
 659
 660         if (!smbc_getWorkgroup(context)) {
 661                 char *workgroup;
 662
 663                 if (lp_workgroup()) {
 664                         workgroup = SMB_STRDUP(lp_workgroup());
 665                 }
 666                 else {
 667                         /* TODO: Think about a decent default workgroup */
 668                         workgroup = SMB_STRDUP("samba");
 669                 }
 670
 671                 if (!workgroup) {
 672                         TALLOC_FREE(frame);
 673                         errno = ENOMEM;
 674                         return NULL;
 675                 }
 676
 677                 smbc_setWorkgroup(context, workgroup);
 678                 SAFE_FREE(workgroup);
 679
 680                 if (!smbc_getWorkgroup(context)) {
 681                         TALLOC_FREE(frame);
 682                         errno = ENOMEM;
 683                         return NULL;
 684                 }
 685         }
 686
 687         DEBUG(1, ("Using workgroup %s.\n", smbc_getWorkgroup(context)));
 688
 689         /* shortest timeout is 1 second */
 690         if (smbc_getTimeout(context) > 0 && smbc_getTimeout(context) < 1000)
 691                 smbc_setTimeout(context, 1000);
 692
 693         context->internal->initialized = True;
 694
 695         /* Protect access to the count of contexts in use */
 696         if (SMB_THREAD_LOCK(initialized_ctx_count_mutex) != 0) {
 697                 smb_panic("error locking 'initialized_ctx_count'");
 698         }
 699
 700         initialized_ctx_count++;
 701
 702         /* Unlock the mutex */
 703         if (SMB_THREAD_UNLOCK(initialized_ctx_count_mutex) != 0) {
 704                 smb_panic("error unlocking 'initialized_ctx_count'");
 705         }
 706
 707         TALLOC_FREE(frame);
 708         return context;
 709 }
 710
 711
 712 /* Return the verion of samba, and thus libsmbclient */
 713 const char *
 714 smbc_version(void)
 715 {
 716         return samba_version_string();
 717 }
 718
 719 /*
 720  * Set the credentials so DFS will work when following referrals.
 721  * This function is broken and must be removed. No SMBCCTX arg...
 722  * JRA.
 723  */
 724
 725 void
 726 smbc_set_credentials(const char *workgroup,
 727                         const char *user,
 728                         const char *password,
 729                         smbc_bool use_kerberos,
 730                         const char *signing_state)
 731 {
 732         d_printf("smbc_set_credentials is obsolete. Replace with smbc_set_credentials_with_fallback().\n");
 733 }
 734
 735 void smbc_set_credentials_with_fallback(SMBCCTX *context,
 736                                         const char *workgroup,
 737                                         const char *user,
 738                                         const char *password)
 739 {
 740         smbc_bool use_kerberos = false;
 741         const char *signing_state = "off";
 742         struct user_auth_info *auth_info = NULL;
 743         TALLOC_CTX *frame;
 744
 745         if (! context) {
 746
 747                 return;
 748         }
 749
 750         frame = talloc_stackframe();
 751
 752         if (! workgroup || ! *workgroup) {
 753                 workgroup = smbc_getWorkgroup(context);
 754         }
 755
 756         if (! user) {
 757                 user = smbc_getUser(context);
 758         }
 759
 760         if (! password) {
 761                 password = "";
 762         }
 763
 764         auth_info = user_auth_info_init(NULL);
 765
 766         if (! auth_info) {
 767                 DEBUG(0, ("smbc_set_credentials_with_fallback: allocation fail\n"));
 768                 TALLOC_FREE(frame);
 769                 return;
 770         }
 771
 772         if (smbc_getOptionUseKerberos(context)) {
 773                 use_kerberos = True;
 774         }
 775
 776         if (lp_client_signing() != SMB_SIGNING_OFF) {
 777                 signing_state = "if_required";
 778         }
 779
 780         if (lp_client_signing() == SMB_SIGNING_REQUIRED) {
 781                 signing_state = "required";
 782         }
 783
 784         set_cmdline_auth_info_username(auth_info, user);
 785         set_cmdline_auth_info_domain(auth_info, workgroup);
 786         set_cmdline_auth_info_password(auth_info, password);
 787         set_cmdline_auth_info_use_kerberos(auth_info, use_kerberos);
 788         set_cmdline_auth_info_signing_state(auth_info, signing_state);
 789         set_cmdline_auth_info_fallback_after_kerberos(auth_info,
 790                 smbc_getOptionFallbackAfterKerberos(context));
 791         set_cmdline_auth_info_use_ccache(
 792                 auth_info, smbc_getOptionUseCCache(context));
 793
 794         TALLOC_FREE(context->internal->auth_info);
 795
 796         context->internal->auth_info = auth_info;
 797         TALLOC_FREE(frame);
 798 }