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         smbc_setPort(context, 0);
 173
 174         smbc_setOptionFullTimeNames(context, False);
 175         smbc_setOptionOpenShareMode(context, SMBC_SHAREMODE_DENY_NONE);
 176         smbc_setOptionSmbEncryptionLevel(context, SMBC_ENCRYPTLEVEL_NONE);
 177         smbc_setOptionUseCCache(context, True);
 178         smbc_setOptionCaseSensitive(context, False);
 179         smbc_setOptionBrowseMaxLmbCount(context, 3);    /* # LMBs to query */
 180         smbc_setOptionUrlEncodeReaddirEntries(context, False);
 181         smbc_setOptionOneSharePerServer(context, False);
 182         if (getenv("LIBSMBCLIENT_NO_CCACHE") == NULL) {
 183                 smbc_setOptionUseCCache(context, true);
 184         }
 185
 186         smbc_setFunctionAuthData(context, SMBC_get_auth_data);
 187         smbc_setFunctionCheckServer(context, SMBC_check_server);
 188         smbc_setFunctionRemoveUnusedServer(context, SMBC_remove_unused_server);
 189
 190         smbc_setOptionUserData(context, NULL);
 191         smbc_setFunctionAddCachedServer(context, SMBC_add_cached_server);
 192         smbc_setFunctionGetCachedServer(context, SMBC_get_cached_server);
 193         smbc_setFunctionRemoveCachedServer(context, SMBC_remove_cached_server);
 194         smbc_setFunctionPurgeCachedServers(context, SMBC_purge_cached_servers);
 195
 196         smbc_setFunctionOpen(context, SMBC_open_ctx);
 197         smbc_setFunctionCreat(context, SMBC_creat_ctx);
 198         smbc_setFunctionRead(context, SMBC_read_ctx);
 199         smbc_setFunctionWrite(context, SMBC_write_ctx);
 200         smbc_setFunctionClose(context, SMBC_close_ctx);
 201         smbc_setFunctionUnlink(context, SMBC_unlink_ctx);
 202         smbc_setFunctionRename(context, SMBC_rename_ctx);
 203         smbc_setFunctionLseek(context, SMBC_lseek_ctx);
 204         smbc_setFunctionFtruncate(context, SMBC_ftruncate_ctx);
 205         smbc_setFunctionStat(context, SMBC_stat_ctx);
 206         smbc_setFunctionStatVFS(context, SMBC_statvfs_ctx);
 207         smbc_setFunctionFstatVFS(context, SMBC_fstatvfs_ctx);
 208         smbc_setFunctionFstat(context, SMBC_fstat_ctx);
 209         smbc_setFunctionOpendir(context, SMBC_opendir_ctx);
 210         smbc_setFunctionClosedir(context, SMBC_closedir_ctx);
 211         smbc_setFunctionReaddir(context, SMBC_readdir_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_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                         smbc_getFunctionClose(context)(context, f);
 260                         f = f->next;
 261                 }
 262                 context->internal->files = NULL;
 263
 264                 /* First try to remove the servers the nice way. */
 265                 if (smbc_getFunctionPurgeCachedServers(context)(context)) {
 266                         SMBCSRV * s;
 267                         SMBCSRV * next;
 268                         DEBUG(1, ("Could not purge all servers, "
 269                                   "Nice way shutdown failed.\n"));
 270                         s = context->internal->servers;
 271                         while (s) {
 272                                 DEBUG(1, ("Forced shutdown: %p (cli=%p)\n",
 273                                           s, s->cli));
 274                                 cli_shutdown(s->cli);
 275                                 smbc_getFunctionRemoveCachedServer(context)(context,
 276                                                                          s);
 277                                 next = s->next;
 278                                 DLIST_REMOVE(context->internal->servers, s);
 279                                 SAFE_FREE(s);
 280                                 s = next;
 281                         }
 282                         context->internal->servers = NULL;
 283                 }
 284         }
 285         else {
 286                 /* This is the polite way */
 287                 if (smbc_getFunctionPurgeCachedServers(context)(context)) {
 288                         DEBUG(1, ("Could not purge all servers, "
 289                                   "free_context failed.\n"));
 290                         errno = EBUSY;
 291                         TALLOC_FREE(frame);
 292                         return 1;
 293                 }
 294                 if (context->internal->servers) {
 295                         DEBUG(1, ("Active servers in context, "
 296                                   "free_context failed.\n"));
 297                         errno = EBUSY;
 298                         TALLOC_FREE(frame);
 299                         return 1;
 300                 }
 301                 if (context->internal->files) {
 302                         DEBUG(1, ("Active files in context, "
 303                                   "free_context failed.\n"));
 304                         errno = EBUSY;
 305                         TALLOC_FREE(frame);
 306                         return 1;
 307                 }
 308         }
 309
 310         /* Things we have to clean up */
 311         smbc_setWorkgroup(context, NULL);
 312         smbc_setNetbiosName(context, NULL);
 313         smbc_setUser(context, NULL);
 314
 315         DEBUG(3, ("Context %p successfully freed\n", context));
 316
 317         /* Free any DFS auth context. */
 318         TALLOC_FREE(context->internal->auth_info);
 319
 320         SAFE_FREE(context->internal);
 321         SAFE_FREE(context);
 322
 323         /* Protect access to the count of contexts in use */
 324         if (SMB_THREAD_LOCK(initialized_ctx_count_mutex) != 0) {
 325                 smb_panic("error locking 'initialized_ctx_count'");
 326         }
 327
 328         if (initialized_ctx_count) {
 329                 initialized_ctx_count--;
 330         }
 331
 332         if (initialized_ctx_count == 0) {
 333             SMBC_module_terminate();
 334         }
 335
 336         /* Unlock the mutex */
 337         if (SMB_THREAD_UNLOCK(initialized_ctx_count_mutex) != 0) {
 338                 smb_panic("error unlocking 'initialized_ctx_count'");
 339         }
 340
 341         TALLOC_FREE(frame);
 342         return 0;
 343 }
 344
 345
 346 /**
 347  * Deprecated interface.  Do not use.  Instead, use the various
 348  * smbc_setOption*() functions or smbc_setFunctionAuthDataWithContext().
 349  */
 350 void
 351 smbc_option_set(SMBCCTX *context,
 352                 char *option_name,
 353                 ... /* option_value */)
 354 {
 355         va_list ap;
 356         union {
 357                 int i;
 358                 bool b;
 359                 smbc_get_auth_data_with_context_fn auth_fn;
 360                 void *v;
 361                 const char *s;
 362         } option_value;
 363
 364         TALLOC_CTX *frame = talloc_stackframe();
 365
 366         va_start(ap, option_name);
 367
 368         if (strcmp(option_name, "debug_to_stderr") == 0) {
 369                 option_value.b = (bool) va_arg(ap, int);
 370                 smbc_setOptionDebugToStderr(context, option_value.b);
 371
 372         } else if (strcmp(option_name, "full_time_names") == 0) {
 373                 option_value.b = (bool) va_arg(ap, int);
 374                 smbc_setOptionFullTimeNames(context, option_value.b);
 375
 376         } else if (strcmp(option_name, "open_share_mode") == 0) {
 377                 option_value.i = va_arg(ap, int);
 378                 smbc_setOptionOpenShareMode(context, option_value.i);
 379
 380         } else if (strcmp(option_name, "auth_function") == 0) {
 381                 option_value.auth_fn =
 382                         va_arg(ap, smbc_get_auth_data_with_context_fn);
 383                 smbc_setFunctionAuthDataWithContext(context, option_value.auth_fn);
 384
 385         } else if (strcmp(option_name, "user_data") == 0) {
 386                 option_value.v = va_arg(ap, void *);
 387                 smbc_setOptionUserData(context, option_value.v);
 388
 389         } else if (strcmp(option_name, "smb_encrypt_level") == 0) {
 390                 option_value.s = va_arg(ap, const char *);
 391                 if (strcmp(option_value.s, "none") == 0) {
 392                         smbc_setOptionSmbEncryptionLevel(context,
 393                                                          SMBC_ENCRYPTLEVEL_NONE);
 394                 } else if (strcmp(option_value.s, "request") == 0) {
 395                         smbc_setOptionSmbEncryptionLevel(context,
 396                                                          SMBC_ENCRYPTLEVEL_REQUEST);
 397                 } else if (strcmp(option_value.s, "require") == 0) {
 398                         smbc_setOptionSmbEncryptionLevel(context,
 399                                                          SMBC_ENCRYPTLEVEL_REQUIRE);
 400                 }
 401
 402         } else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
 403                 option_value.i = va_arg(ap, int);
 404                 smbc_setOptionBrowseMaxLmbCount(context, option_value.i);
 405
 406         } else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
 407                 option_value.b = (bool) va_arg(ap, int);
 408                 smbc_setOptionUrlEncodeReaddirEntries(context, option_value.b);
 409
 410         } else if (strcmp(option_name, "one_share_per_server") == 0) {
 411                 option_value.b = (bool) va_arg(ap, int);
 412                 smbc_setOptionOneSharePerServer(context, option_value.b);
 413
 414         } else if (strcmp(option_name, "use_kerberos") == 0) {
 415                 option_value.b = (bool) va_arg(ap, int);
 416                 smbc_setOptionUseKerberos(context, option_value.b);
 417
 418         } else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
 419                 option_value.b = (bool) va_arg(ap, int);
 420                 smbc_setOptionFallbackAfterKerberos(context, option_value.b);
 421
 422         } else if (strcmp(option_name, "use_ccache") == 0) {
 423                 option_value.b = (bool) va_arg(ap, int);
 424                 smbc_setOptionUseCCache(context, option_value.b);
 425
 426         } else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
 427                 option_value.b = (bool) va_arg(ap, int);
 428                 smbc_setOptionNoAutoAnonymousLogin(context, option_value.b);
 429         }
 430
 431         va_end(ap);
 432         TALLOC_FREE(frame);
 433 }
 434
 435
 436 /*
 437  * Deprecated interface.  Do not use.  Instead, use the various
 438  * smbc_getOption*() functions.
 439  */
 440 void *
 441 smbc_option_get(SMBCCTX *context,
 442                 char *option_name)
 443 {
 444         if (strcmp(option_name, "debug_stderr") == 0) {
 445 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 446                 return (void *) (intptr_t) smbc_getOptionDebugToStderr(context);
 447 #else
 448                 return (void *) smbc_getOptionDebugToStderr(context);
 449 #endif
 450
 451         } else if (strcmp(option_name, "full_time_names") == 0) {
 452 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 453                 return (void *) (intptr_t) smbc_getOptionFullTimeNames(context);
 454 #else
 455                 return (void *) smbc_getOptionFullTimeNames(context);
 456 #endif
 457
 458         } else if (strcmp(option_name, "open_share_mode") == 0) {
 459 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 460                 return (void *) (intptr_t) smbc_getOptionOpenShareMode(context);
 461 #else
 462                 return (void *) smbc_getOptionOpenShareMode(context);
 463 #endif
 464
 465         } else if (strcmp(option_name, "auth_function") == 0) {
 466                 return (void *) smbc_getFunctionAuthDataWithContext(context);
 467
 468         } else if (strcmp(option_name, "user_data") == 0) {
 469                 return smbc_getOptionUserData(context);
 470
 471         } else if (strcmp(option_name, "smb_encrypt_level") == 0) {
 472                 switch(smbc_getOptionSmbEncryptionLevel(context))
 473                 {
 474                 case 0:
 475                         return discard_const_p(void, "none");
 476                 case 1:
 477                         return discard_const_p(void, "request");
 478                 case 2:
 479                         return discard_const_p(void, "require");
 480                 }
 481
 482         } else if (strcmp(option_name, "smb_encrypt_on") == 0) {
 483                 SMBCSRV *s;
 484                 unsigned int num_servers = 0;
 485
 486                 for (s = context->internal->servers; s; s = s->next) {
 487                         num_servers++;
 488                         if (!smb1cli_conn_encryption_on(s->cli->conn)) {
 489                                 return (void *)false;
 490                         }
 491                 }
 492 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 493                 return (void *) (intptr_t) (bool) (num_servers > 0);
 494 #else
 495                 return (void *) (bool) (num_servers > 0);
 496 #endif
 497
 498         } else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
 499 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 500                 return (void *) (intptr_t) smbc_getOptionBrowseMaxLmbCount(context);
 501 #else
 502                 return (void *) smbc_getOptionBrowseMaxLmbCount(context);
 503 #endif
 504
 505         } else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
 506 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 507                 return (void *)(intptr_t) smbc_getOptionUrlEncodeReaddirEntries(context);
 508 #else
 509                 return (void *) (bool) smbc_getOptionUrlEncodeReaddirEntries(context);
 510 #endif
 511
 512         } else if (strcmp(option_name, "one_share_per_server") == 0) {
 513 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 514                 return (void *) (intptr_t) smbc_getOptionOneSharePerServer(context);
 515 #else
 516                 return (void *) (bool) smbc_getOptionOneSharePerServer(context);
 517 #endif
 518
 519         } else if (strcmp(option_name, "use_kerberos") == 0) {
 520 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 521                 return (void *) (intptr_t) smbc_getOptionUseKerberos(context);
 522 #else
 523                 return (void *) (bool) smbc_getOptionUseKerberos(context);
 524 #endif
 525
 526         } else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
 527 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 528                 return (void *)(intptr_t) smbc_getOptionFallbackAfterKerberos(context);
 529 #else
 530                 return (void *) (bool) smbc_getOptionFallbackAfterKerberos(context);
 531 #endif
 532
 533         } else if (strcmp(option_name, "use_ccache") == 0) {
 534 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 535                 return (void *) (intptr_t) smbc_getOptionUseCCache(context);
 536 #else
 537                 return (void *) (bool) smbc_getOptionUseCCache(context);
 538 #endif
 539
 540         } else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
 541 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 542                 return (void *) (intptr_t) smbc_getOptionNoAutoAnonymousLogin(context);
 543 #else
 544                 return (void *) (bool) smbc_getOptionNoAutoAnonymousLogin(context);
 545 #endif
 546         }
 547
 548         return NULL;
 549 }
 550
 551
 552 /*
 553  * Initialize the library, etc.
 554  *
 555  * We accept a struct containing handle information.
 556  * valid values for info->debug from 0 to 100,
 557  * and insist that info->fn must be non-null.
 558  */
 559 SMBCCTX *
 560 smbc_init_context(SMBCCTX *context)
 561 {
 562         int pid;
 563         TALLOC_CTX *frame;
 564
 565         if (!context) {
 566                 errno = EBADF;
 567                 return NULL;
 568         }
 569
 570         /* Do not initialise the same client twice */
 571         if (context->internal->initialized) {
 572                 return NULL;
 573         }
 574
 575         frame = talloc_stackframe();
 576
 577         if ((!smbc_getFunctionAuthData(context) &&
 578              !smbc_getFunctionAuthDataWithContext(context)) ||
 579             smbc_getDebug(context) < 0 ||
 580             smbc_getDebug(context) > 100) {
 581
 582                 TALLOC_FREE(frame);
 583                 errno = EINVAL;
 584                 return NULL;
 585
 586         }
 587
 588         if (!smbc_getUser(context)) {
 589                 /*
 590                  * FIXME: Is this the best way to get the user info?
 591                  */
 592                 char *user = getenv("USER");
 593                 /* walk around as "guest" if no username can be found */
 594                 if (!user) {
 595                         user = SMB_STRDUP("guest");
 596                 } else {
 597                         user = SMB_STRDUP(user);
 598                 }
 599
 600                 if (!user) {
 601                         TALLOC_FREE(frame);
 602                         errno = ENOMEM;
 603                         return NULL;
 604                 }
 605
 606                 smbc_setUser(context, user);
 607                 SAFE_FREE(user);
 608
 609                 if (!smbc_getUser(context)) {
 610                         TALLOC_FREE(frame);
 611                         errno = ENOMEM;
 612                         return NULL;
 613                 }
 614         }
 615
 616         if (!smbc_getNetbiosName(context)) {
 617                 /*
 618                  * We try to get our netbios name from the config. If that
 619                  * fails we fall back on constructing our netbios name from
 620                  * our hostname etc
 621                  */
 622                 char *netbios_name;
 623                 if (lp_netbios_name()) {
 624                         netbios_name = SMB_STRDUP(lp_netbios_name());
 625                 } else {
 626                         /*
 627                          * Hmmm, I want to get hostname as well, but I am too
 628                          * lazy for the moment
 629                          */
 630                         pid = getpid();
 631                         netbios_name = (char *)SMB_MALLOC(17);
 632                         if (!netbios_name) {
 633                                 TALLOC_FREE(frame);
 634                                 errno = ENOMEM;
 635                                 return NULL;
 636                         }
 637                         slprintf(netbios_name, 16,
 638                                  "smbc%s%d", smbc_getUser(context), pid);
 639                 }
 640
 641                 if (!netbios_name) {
 642                         TALLOC_FREE(frame);
 643                         errno = ENOMEM;
 644                         return NULL;
 645                 }
 646
 647                 smbc_setNetbiosName(context, netbios_name);
 648                 SAFE_FREE(netbios_name);
 649
 650                 if (!smbc_getNetbiosName(context)) {
 651                         TALLOC_FREE(frame);
 652                         errno = ENOMEM;
 653                         return NULL;
 654                 }
 655         }
 656
 657         DEBUG(1, ("Using netbios name %s.\n", smbc_getNetbiosName(context)));
 658
 659         if (!smbc_getWorkgroup(context)) {
 660                 char *workgroup;
 661
 662                 if (lp_workgroup()) {
 663                         workgroup = SMB_STRDUP(lp_workgroup());
 664                 }
 665                 else {
 666                         /* TODO: Think about a decent default workgroup */
 667                         workgroup = SMB_STRDUP("samba");
 668                 }
 669
 670                 if (!workgroup) {
 671                         TALLOC_FREE(frame);
 672                         errno = ENOMEM;
 673                         return NULL;
 674                 }
 675
 676                 smbc_setWorkgroup(context, workgroup);
 677                 SAFE_FREE(workgroup);
 678
 679                 if (!smbc_getWorkgroup(context)) {
 680                         TALLOC_FREE(frame);
 681                         errno = ENOMEM;
 682                         return NULL;
 683                 }
 684         }
 685
 686         DEBUG(1, ("Using workgroup %s.\n", smbc_getWorkgroup(context)));
 687
 688         /* shortest timeout is 1 second */
 689         if (smbc_getTimeout(context) > 0 && smbc_getTimeout(context) < 1000)
 690                 smbc_setTimeout(context, 1000);
 691
 692         context->internal->initialized = True;
 693
 694         /* Protect access to the count of contexts in use */
 695         if (SMB_THREAD_LOCK(initialized_ctx_count_mutex) != 0) {
 696                 smb_panic("error locking 'initialized_ctx_count'");
 697         }
 698
 699         initialized_ctx_count++;
 700
 701         /* Unlock the mutex */
 702         if (SMB_THREAD_UNLOCK(initialized_ctx_count_mutex) != 0) {
 703                 smb_panic("error unlocking 'initialized_ctx_count'");
 704         }
 705
 706         TALLOC_FREE(frame);
 707         return context;
 708 }
 709
 710
 711 /* Return the verion of samba, and thus libsmbclient */
 712 const char *
 713 smbc_version(void)
 714 {
 715         return samba_version_string();
 716 }
 717
 718 /*
 719  * Set the credentials so DFS will work when following referrals.
 720  * This function is broken and must be removed. No SMBCCTX arg...
 721  * JRA.
 722  */
 723
 724 void
 725 smbc_set_credentials(const char *workgroup,
 726                         const char *user,
 727                         const char *password,
 728                         smbc_bool use_kerberos,
 729                         const char *signing_state)
 730 {
 731         d_printf("smbc_set_credentials is obsolete. Replace with smbc_set_credentials_with_fallback().\n");
 732 }
 733
 734 void smbc_set_credentials_with_fallback(SMBCCTX *context,
 735                                         const char *workgroup,
 736                                         const char *user,
 737                                         const char *password)
 738 {
 739         smbc_bool use_kerberos = false;
 740         const char *signing_state = "off";
 741         struct user_auth_info *auth_info = NULL;
 742         TALLOC_CTX *frame;
 743
 744         if (! context) {
 745
 746                 return;
 747         }
 748
 749         frame = talloc_stackframe();
 750
 751         if (! workgroup || ! *workgroup) {
 752                 workgroup = smbc_getWorkgroup(context);
 753         }
 754
 755         if (! user) {
 756                 user = smbc_getUser(context);
 757         }
 758
 759         if (! password) {
 760                 password = "";
 761         }
 762
 763         auth_info = user_auth_info_init(NULL);
 764
 765         if (! auth_info) {
 766                 DEBUG(0, ("smbc_set_credentials_with_fallback: allocation fail\n"));
 767                 TALLOC_FREE(frame);
 768                 return;
 769         }
 770
 771         if (smbc_getOptionUseKerberos(context)) {
 772                 use_kerberos = True;
 773         }
 774
 775         if (lp_client_signing() != SMB_SIGNING_OFF) {
 776                 signing_state = "if_required";
 777         }
 778
 779         if (lp_client_signing() == SMB_SIGNING_REQUIRED) {
 780                 signing_state = "required";
 781         }
 782
 783         set_cmdline_auth_info_username(auth_info, user);
 784         set_cmdline_auth_info_domain(auth_info, workgroup);
 785         set_cmdline_auth_info_password(auth_info, password);
 786         set_cmdline_auth_info_use_kerberos(auth_info, use_kerberos);
 787         set_cmdline_auth_info_signing_state(auth_info, signing_state);
 788         set_cmdline_auth_info_fallback_after_kerberos(auth_info,
 789                 smbc_getOptionFallbackAfterKerberos(context));
 790         set_cmdline_auth_info_use_ccache(
 791                 auth_info, smbc_getOptionUseCCache(context));
 792
 793         TALLOC_FREE(context->internal->auth_info);
 794
 795         context->internal->auth_info = auth_info;
 796         TALLOC_FREE(frame);
 797 }