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_setFunctionReaddirPlus(context, SMBC_readdirplus_ctx);
 212         smbc_setFunctionGetdents(context, SMBC_getdents_ctx);
 213         smbc_setFunctionMkdir(context, SMBC_mkdir_ctx);
 214         smbc_setFunctionRmdir(context, SMBC_rmdir_ctx);
 215         smbc_setFunctionTelldir(context, SMBC_telldir_ctx);
 216         smbc_setFunctionLseekdir(context, SMBC_lseekdir_ctx);
 217         smbc_setFunctionFstatdir(context, SMBC_fstatdir_ctx);
 218         smbc_setFunctionNotify(context, SMBC_notify_ctx);
 219         smbc_setFunctionChmod(context, SMBC_chmod_ctx);
 220         smbc_setFunctionUtimes(context, SMBC_utimes_ctx);
 221         smbc_setFunctionSetxattr(context, SMBC_setxattr_ctx);
 222         smbc_setFunctionGetxattr(context, SMBC_getxattr_ctx);
 223         smbc_setFunctionRemovexattr(context, SMBC_removexattr_ctx);
 224         smbc_setFunctionListxattr(context, SMBC_listxattr_ctx);
 225
 226         smbc_setFunctionOpenPrintJob(context, SMBC_open_print_job_ctx);
 227         smbc_setFunctionPrintFile(context, SMBC_print_file_ctx);
 228         smbc_setFunctionListPrintJobs(context, SMBC_list_print_jobs_ctx);
 229         smbc_setFunctionUnlinkPrintJob(context, SMBC_unlink_print_job_ctx);
 230
 231         TALLOC_FREE(frame);
 232         return context;
 233 }
 234
 235 /*
 236  * Free a context
 237  *
 238  * Returns 0 on success. Otherwise returns 1, the SMBCCTX is _not_ freed
 239  * and thus you'll be leaking memory if not handled properly.
 240  *
 241  */
 242 int
 243 smbc_free_context(SMBCCTX *context,
 244                   int shutdown_ctx)
 245 {
 246         TALLOC_CTX *frame;
 247         if (!context) {
 248                 errno = EBADF;
 249                 return 1;
 250         }
 251
 252         frame = talloc_stackframe();
 253
 254         if (shutdown_ctx) {
 255                 SMBCFILE * f;
 256                 DEBUG(1,("Performing aggressive shutdown.\n"));
 257
 258                 f = context->internal->files;
 259                 while (f) {
 260                         SMBCFILE *next = f->next;
 261                         smbc_getFunctionClose(context)(context, f);
 262                         f = next;
 263                 }
 264                 context->internal->files = NULL;
 265
 266                 /* First try to remove the servers the nice way. */
 267                 if (smbc_getFunctionPurgeCachedServers(context)(context)) {
 268                         SMBCSRV * s;
 269                         SMBCSRV * next;
 270                         DEBUG(1, ("Could not purge all servers, "
 271                                   "Nice way shutdown failed.\n"));
 272                         s = context->internal->servers;
 273                         while (s) {
 274                                 DEBUG(1, ("Forced shutdown: %p (cli=%p)\n",
 275                                           s, s->cli));
 276                                 cli_shutdown(s->cli);
 277                                 smbc_getFunctionRemoveCachedServer(context)(context,
 278                                                                          s);
 279                                 next = s->next;
 280                                 DLIST_REMOVE(context->internal->servers, s);
 281                                 SAFE_FREE(s);
 282                                 s = next;
 283                         }
 284                         context->internal->servers = NULL;
 285                 }
 286         }
 287         else {
 288                 /* This is the polite way */
 289                 if (smbc_getFunctionPurgeCachedServers(context)(context)) {
 290                         DEBUG(1, ("Could not purge all servers, "
 291                                   "free_context failed.\n"));
 292                         errno = EBUSY;
 293                         TALLOC_FREE(frame);
 294                         return 1;
 295                 }
 296                 if (context->internal->servers) {
 297                         DEBUG(1, ("Active servers in context, "
 298                                   "free_context failed.\n"));
 299                         errno = EBUSY;
 300                         TALLOC_FREE(frame);
 301                         return 1;
 302                 }
 303                 if (context->internal->files) {
 304                         DEBUG(1, ("Active files in context, "
 305                                   "free_context failed.\n"));
 306                         errno = EBUSY;
 307                         TALLOC_FREE(frame);
 308                         return 1;
 309                 }
 310         }
 311
 312         /* Things we have to clean up */
 313         smbc_setWorkgroup(context, NULL);
 314         smbc_setNetbiosName(context, NULL);
 315         smbc_setUser(context, NULL);
 316
 317         DEBUG(3, ("Context %p successfully freed\n", context));
 318
 319         /* Free any DFS auth context. */
 320         TALLOC_FREE(context->internal->auth_info);
 321
 322         SAFE_FREE(context->internal);
 323         SAFE_FREE(context);
 324
 325         /* Protect access to the count of contexts in use */
 326         if (SMB_THREAD_LOCK(initialized_ctx_count_mutex) != 0) {
 327                 smb_panic("error locking 'initialized_ctx_count'");
 328         }
 329
 330         if (initialized_ctx_count) {
 331                 initialized_ctx_count--;
 332         }
 333
 334         if (initialized_ctx_count == 0) {
 335             SMBC_module_terminate();
 336         }
 337
 338         /* Unlock the mutex */
 339         if (SMB_THREAD_UNLOCK(initialized_ctx_count_mutex) != 0) {
 340                 smb_panic("error unlocking 'initialized_ctx_count'");
 341         }
 342
 343         TALLOC_FREE(frame);
 344         return 0;
 345 }
 346
 347
 348 /**
 349  * Deprecated interface.  Do not use.  Instead, use the various
 350  * smbc_setOption*() functions or smbc_setFunctionAuthDataWithContext().
 351  */
 352 void
 353 smbc_option_set(SMBCCTX *context,
 354                 char *option_name,
 355                 ... /* option_value */)
 356 {
 357         va_list ap;
 358         union {
 359                 int i;
 360                 bool b;
 361                 smbc_get_auth_data_with_context_fn auth_fn;
 362                 void *v;
 363                 const char *s;
 364         } option_value;
 365
 366         TALLOC_CTX *frame = talloc_stackframe();
 367
 368         va_start(ap, option_name);
 369
 370         if (strcmp(option_name, "debug_to_stderr") == 0) {
 371                 option_value.b = (bool) va_arg(ap, int);
 372                 smbc_setOptionDebugToStderr(context, option_value.b);
 373
 374         } else if (strcmp(option_name, "full_time_names") == 0) {
 375                 option_value.b = (bool) va_arg(ap, int);
 376                 smbc_setOptionFullTimeNames(context, option_value.b);
 377
 378         } else if (strcmp(option_name, "open_share_mode") == 0) {
 379                 option_value.i = va_arg(ap, int);
 380                 smbc_setOptionOpenShareMode(context, option_value.i);
 381
 382         } else if (strcmp(option_name, "auth_function") == 0) {
 383                 option_value.auth_fn =
 384                         va_arg(ap, smbc_get_auth_data_with_context_fn);
 385                 smbc_setFunctionAuthDataWithContext(context, option_value.auth_fn);
 386
 387         } else if (strcmp(option_name, "user_data") == 0) {
 388                 option_value.v = va_arg(ap, void *);
 389                 smbc_setOptionUserData(context, option_value.v);
 390
 391         } else if (strcmp(option_name, "smb_encrypt_level") == 0) {
 392                 option_value.s = va_arg(ap, const char *);
 393                 if (strcmp(option_value.s, "none") == 0) {
 394                         smbc_setOptionSmbEncryptionLevel(context,
 395                                                          SMBC_ENCRYPTLEVEL_NONE);
 396                 } else if (strcmp(option_value.s, "request") == 0) {
 397                         smbc_setOptionSmbEncryptionLevel(context,
 398                                                          SMBC_ENCRYPTLEVEL_REQUEST);
 399                 } else if (strcmp(option_value.s, "require") == 0) {
 400                         smbc_setOptionSmbEncryptionLevel(context,
 401                                                          SMBC_ENCRYPTLEVEL_REQUIRE);
 402                 }
 403
 404         } else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
 405                 option_value.i = va_arg(ap, int);
 406                 smbc_setOptionBrowseMaxLmbCount(context, option_value.i);
 407
 408         } else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
 409                 option_value.b = (bool) va_arg(ap, int);
 410                 smbc_setOptionUrlEncodeReaddirEntries(context, option_value.b);
 411
 412         } else if (strcmp(option_name, "one_share_per_server") == 0) {
 413                 option_value.b = (bool) va_arg(ap, int);
 414                 smbc_setOptionOneSharePerServer(context, option_value.b);
 415
 416         } else if (strcmp(option_name, "use_kerberos") == 0) {
 417                 option_value.b = (bool) va_arg(ap, int);
 418                 smbc_setOptionUseKerberos(context, option_value.b);
 419
 420         } else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
 421                 option_value.b = (bool) va_arg(ap, int);
 422                 smbc_setOptionFallbackAfterKerberos(context, option_value.b);
 423
 424         } else if (strcmp(option_name, "use_ccache") == 0) {
 425                 option_value.b = (bool) va_arg(ap, int);
 426                 smbc_setOptionUseCCache(context, option_value.b);
 427
 428         } else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
 429                 option_value.b = (bool) va_arg(ap, int);
 430                 smbc_setOptionNoAutoAnonymousLogin(context, option_value.b);
 431         }
 432
 433         va_end(ap);
 434         TALLOC_FREE(frame);
 435 }
 436
 437
 438 /*
 439  * Deprecated interface.  Do not use.  Instead, use the various
 440  * smbc_getOption*() functions.
 441  */
 442 void *
 443 smbc_option_get(SMBCCTX *context,
 444                 char *option_name)
 445 {
 446         if (strcmp(option_name, "debug_stderr") == 0) {
 447 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 448                 return (void *) (intptr_t) smbc_getOptionDebugToStderr(context);
 449 #else
 450                 return (void *) smbc_getOptionDebugToStderr(context);
 451 #endif
 452
 453         } else if (strcmp(option_name, "full_time_names") == 0) {
 454 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 455                 return (void *) (intptr_t) smbc_getOptionFullTimeNames(context);
 456 #else
 457                 return (void *) smbc_getOptionFullTimeNames(context);
 458 #endif
 459
 460         } else if (strcmp(option_name, "open_share_mode") == 0) {
 461 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 462                 return (void *) (intptr_t) smbc_getOptionOpenShareMode(context);
 463 #else
 464                 return (void *) smbc_getOptionOpenShareMode(context);
 465 #endif
 466
 467         } else if (strcmp(option_name, "auth_function") == 0) {
 468                 return (void *) smbc_getFunctionAuthDataWithContext(context);
 469
 470         } else if (strcmp(option_name, "user_data") == 0) {
 471                 return smbc_getOptionUserData(context);
 472
 473         } else if (strcmp(option_name, "smb_encrypt_level") == 0) {
 474                 switch(smbc_getOptionSmbEncryptionLevel(context))
 475                 {
 476                 case 0:
 477                         return discard_const_p(void, "none");
 478                 case 1:
 479                         return discard_const_p(void, "request");
 480                 case 2:
 481                         return discard_const_p(void, "require");
 482                 }
 483
 484         } else if (strcmp(option_name, "smb_encrypt_on") == 0) {
 485                 SMBCSRV *s;
 486                 unsigned int num_servers = 0;
 487
 488                 for (s = context->internal->servers; s; s = s->next) {
 489                         num_servers++;
 490                         if (!cli_state_is_encryption_on(s->cli)) {
 491                                 return (void *)false;
 492                         }
 493                 }
 494 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 495                 return (void *) (intptr_t) (bool) (num_servers > 0);
 496 #else
 497                 return (void *) (bool) (num_servers > 0);
 498 #endif
 499
 500         } else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
 501 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 502                 return (void *) (intptr_t) smbc_getOptionBrowseMaxLmbCount(context);
 503 #else
 504                 return (void *) smbc_getOptionBrowseMaxLmbCount(context);
 505 #endif
 506
 507         } else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
 508 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 509                 return (void *)(intptr_t) smbc_getOptionUrlEncodeReaddirEntries(context);
 510 #else
 511                 return (void *) (bool) smbc_getOptionUrlEncodeReaddirEntries(context);
 512 #endif
 513
 514         } else if (strcmp(option_name, "one_share_per_server") == 0) {
 515 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 516                 return (void *) (intptr_t) smbc_getOptionOneSharePerServer(context);
 517 #else
 518                 return (void *) (bool) smbc_getOptionOneSharePerServer(context);
 519 #endif
 520
 521         } else if (strcmp(option_name, "use_kerberos") == 0) {
 522 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 523                 return (void *) (intptr_t) smbc_getOptionUseKerberos(context);
 524 #else
 525                 return (void *) (bool) smbc_getOptionUseKerberos(context);
 526 #endif
 527
 528         } else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
 529 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 530                 return (void *)(intptr_t) smbc_getOptionFallbackAfterKerberos(context);
 531 #else
 532                 return (void *) (bool) smbc_getOptionFallbackAfterKerberos(context);
 533 #endif
 534
 535         } else if (strcmp(option_name, "use_ccache") == 0) {
 536 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 537                 return (void *) (intptr_t) smbc_getOptionUseCCache(context);
 538 #else
 539                 return (void *) (bool) smbc_getOptionUseCCache(context);
 540 #endif
 541
 542         } else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
 543 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 544                 return (void *) (intptr_t) smbc_getOptionNoAutoAnonymousLogin(context);
 545 #else
 546                 return (void *) (bool) smbc_getOptionNoAutoAnonymousLogin(context);
 547 #endif
 548         }
 549
 550         return NULL;
 551 }
 552
 553
 554 /*
 555  * Initialize the library, etc.
 556  *
 557  * We accept a struct containing handle information.
 558  * valid values for info->debug from 0 to 100,
 559  * and insist that info->fn must be non-null.
 560  */
 561 SMBCCTX *
 562 smbc_init_context(SMBCCTX *context)
 563 {
 564         int pid;
 565         TALLOC_CTX *frame;
 566
 567         if (!context) {
 568                 errno = EBADF;
 569                 return NULL;
 570         }
 571
 572         /* Do not initialise the same client twice */
 573         if (context->internal->initialized) {
 574                 return NULL;
 575         }
 576
 577         frame = talloc_stackframe();
 578
 579         if ((!smbc_getFunctionAuthData(context) &&
 580              !smbc_getFunctionAuthDataWithContext(context)) ||
 581             smbc_getDebug(context) < 0 ||
 582             smbc_getDebug(context) > 100) {
 583
 584                 TALLOC_FREE(frame);
 585                 errno = EINVAL;
 586                 return NULL;
 587
 588         }
 589
 590         if (!smbc_getUser(context)) {
 591                 /*
 592                  * FIXME: Is this the best way to get the user info?
 593                  */
 594                 char *user = getenv("USER");
 595                 /* walk around as "guest" if no username can be found */
 596                 if (!user) {
 597                         user = SMB_STRDUP("guest");
 598                 } else {
 599                         user = SMB_STRDUP(user);
 600                 }
 601
 602                 if (!user) {
 603                         TALLOC_FREE(frame);
 604                         errno = ENOMEM;
 605                         return NULL;
 606                 }
 607
 608                 smbc_setUser(context, user);
 609                 SAFE_FREE(user);
 610
 611                 if (!smbc_getUser(context)) {
 612                         TALLOC_FREE(frame);
 613                         errno = ENOMEM;
 614                         return NULL;
 615                 }
 616         }
 617
 618         if (!smbc_getNetbiosName(context)) {
 619                 /*
 620                  * We try to get our netbios name from the config. If that
 621                  * fails we fall back on constructing our netbios name from
 622                  * our hostname etc
 623                  */
 624                 char *netbios_name;
 625                 if (lp_netbios_name()) {
 626                         netbios_name = SMB_STRDUP(lp_netbios_name());
 627                 } else {
 628                         /*
 629                          * Hmmm, I want to get hostname as well, but I am too
 630                          * lazy for the moment
 631                          */
 632                         pid = getpid();
 633                         netbios_name = (char *)SMB_MALLOC(17);
 634                         if (!netbios_name) {
 635                                 TALLOC_FREE(frame);
 636                                 errno = ENOMEM;
 637                                 return NULL;
 638                         }
 639                         slprintf(netbios_name, 16,
 640                                  "smbc%s%d", smbc_getUser(context), pid);
 641                 }
 642
 643                 if (!netbios_name) {
 644                         TALLOC_FREE(frame);
 645                         errno = ENOMEM;
 646                         return NULL;
 647                 }
 648
 649                 smbc_setNetbiosName(context, netbios_name);
 650                 SAFE_FREE(netbios_name);
 651
 652                 if (!smbc_getNetbiosName(context)) {
 653                         TALLOC_FREE(frame);
 654                         errno = ENOMEM;
 655                         return NULL;
 656                 }
 657         }
 658
 659         DEBUG(1, ("Using netbios name %s.\n", smbc_getNetbiosName(context)));
 660
 661         if (!smbc_getWorkgroup(context)) {
 662                 const char *workgroup;
 663
 664                 if (lp_workgroup()) {
 665                         workgroup = lp_workgroup();
 666                 } else {
 667                         /* TODO: Think about a decent default workgroup */
 668                         workgroup = "samba";
 669                 }
 670
 671                 smbc_setWorkgroup(context, workgroup);
 672
 673                 if (!smbc_getWorkgroup(context)) {
 674                         TALLOC_FREE(frame);
 675                         errno = ENOMEM;
 676                         return NULL;
 677                 }
 678         }
 679
 680         DEBUG(1, ("Using workgroup %s.\n", smbc_getWorkgroup(context)));
 681
 682         /* shortest timeout is 1 second */
 683         if (smbc_getTimeout(context) > 0 && smbc_getTimeout(context) < 1000)
 684                 smbc_setTimeout(context, 1000);
 685
 686         context->internal->initialized = True;
 687
 688         /* Protect access to the count of contexts in use */
 689         if (SMB_THREAD_LOCK(initialized_ctx_count_mutex) != 0) {
 690                 smb_panic("error locking 'initialized_ctx_count'");
 691         }
 692
 693         initialized_ctx_count++;
 694
 695         /* Unlock the mutex */
 696         if (SMB_THREAD_UNLOCK(initialized_ctx_count_mutex) != 0) {
 697                 smb_panic("error unlocking 'initialized_ctx_count'");
 698         }
 699
 700         TALLOC_FREE(frame);
 701         return context;
 702 }
 703
 704
 705 /* Return the verion of samba, and thus libsmbclient */
 706 const char *
 707 smbc_version(void)
 708 {
 709         return samba_version_string();
 710 }
 711
 712 /*
 713  * Set the credentials so DFS will work when following referrals.
 714  * This function is broken and must be removed. No SMBCCTX arg...
 715  * JRA.
 716  */
 717
 718 void
 719 smbc_set_credentials(const char *workgroup,
 720                         const char *user,
 721                         const char *password,
 722                         smbc_bool use_kerberos,
 723                         const char *signing_state)
 724 {
 725         d_printf("smbc_set_credentials is obsolete. Replace with smbc_set_credentials_with_fallback().\n");
 726 }
 727
 728 void smbc_set_credentials_with_fallback(SMBCCTX *context,
 729                                         const char *workgroup,
 730                                         const char *user,
 731                                         const char *password)
 732 {
 733         smbc_bool use_kerberos = false;
 734         const char *signing_state = "off";
 735         struct user_auth_info *auth_info = NULL;
 736         TALLOC_CTX *frame;
 737
 738         if (! context) {
 739
 740                 return;
 741         }
 742
 743         frame = talloc_stackframe();
 744
 745         if (! workgroup || ! *workgroup) {
 746                 workgroup = smbc_getWorkgroup(context);
 747         }
 748
 749         if (! user) {
 750                 user = smbc_getUser(context);
 751         }
 752
 753         if (! password) {
 754                 password = "";
 755         }
 756
 757         auth_info = user_auth_info_init(NULL);
 758
 759         if (! auth_info) {
 760                 DEBUG(0, ("smbc_set_credentials_with_fallback: allocation fail\n"));
 761                 TALLOC_FREE(frame);
 762                 return;
 763         }
 764
 765         if (smbc_getOptionUseKerberos(context)) {
 766                 use_kerberos = True;
 767         }
 768
 769         if (lp_client_signing() != SMB_SIGNING_OFF) {
 770                 signing_state = "if_required";
 771         }
 772
 773         if (lp_client_signing() == SMB_SIGNING_REQUIRED) {
 774                 signing_state = "required";
 775         }
 776
 777         set_cmdline_auth_info_username(auth_info, user);
 778         set_cmdline_auth_info_domain(auth_info, workgroup);
 779         set_cmdline_auth_info_password(auth_info, password);
 780         set_cmdline_auth_info_use_kerberos(auth_info, use_kerberos);
 781         set_cmdline_auth_info_signing_state(auth_info, signing_state);
 782         set_cmdline_auth_info_fallback_after_kerberos(auth_info,
 783                 smbc_getOptionFallbackAfterKerberos(context));
 784         set_cmdline_auth_info_use_ccache(
 785                 auth_info, smbc_getOptionUseCCache(context));
 786
 787         TALLOC_FREE(context->internal->auth_info);
 788
 789         context->internal->auth_info = auth_info;
 790         TALLOC_FREE(frame);
 791 }