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