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 #include "auth/credentials/credentials.h"
  32 #include "auth/gensec/gensec.h"
  33 #include "lib/param/param.h"
  34 #include "../lib/util/smb_threads.h"
  35 #include "../lib/util/smb_threads_internal.h"
  36
  37 /*
  38  * Is the logging working / configfile read ?
  39  */
  40 static bool SMBC_initialized = false;
  41 static unsigned int initialized_ctx_count = 0;
  42 static void *initialized_ctx_count_mutex = NULL;
  43
  44 /*
  45  * Do some module- and library-wide initializations
  46  */
  47 static void
  48 SMBC_module_init(void * punused)
  49 {
  50         bool conf_loaded = False;
  51         char *home = NULL;
  52         TALLOC_CTX *frame = talloc_stackframe();
  53
  54         setup_logging("libsmbclient", DEBUG_STDOUT);
  55
  56         /* Here we would open the smb.conf file if needed ... */
  57
  58         home = getenv("HOME");
  59         if (home) {
  60                 char *conf = NULL;
  61                 if (asprintf(&conf, "%s/.smb/smb.conf", home) > 0) {
  62                         if (lp_load_client(conf)) {
  63                                 conf_loaded = True;
  64                         } else {
  65                                 DEBUG(5, ("Could not load config file: %s\n",
  66                                           conf));
  67                         }
  68                         SAFE_FREE(conf);
  69                 }
  70         }
  71
  72         if (!conf_loaded) {
  73                 /*
  74                  * Well, if that failed, try the get_dyn_CONFIGFILE
  75                  * Which points to the standard locn, and if that
  76                  * fails, silently ignore it and use the internal
  77                  * defaults ...
  78                  */
  79
  80                 if (!lp_load_client(get_dyn_CONFIGFILE())) {
  81                         DEBUG(5, ("Could not load config file: %s\n",
  82                                   get_dyn_CONFIGFILE()));
  83                 } else if (home) {
  84                         char *conf;
  85                         /*
  86                          * We loaded the global config file.  Now lets
  87                          * load user-specific modifications to the
  88                          * global config.
  89                          */
  90                         if (asprintf(&conf,
  91                                      "%s/.smb/smb.conf.append",
  92                                      home) > 0) {
  93                                 if (!lp_load_client_no_reinit(conf)) {
  94                                         DEBUG(10,
  95                                               ("Could not append config file: "
  96                                                "%s\n",
  97                                                conf));
  98                                 }
  99                                 SAFE_FREE(conf);
 100                         }
 101                 }
 102         }
 103
 104         load_interfaces();  /* Load the list of interfaces ... */
 105
 106         reopen_logs();  /* Get logging working ... */
 107
 108         /*
 109          * Block SIGPIPE (from lib/util_sock.c: write())
 110          * It is not needed and should not stop execution
 111          */
 112         BlockSignals(True, SIGPIPE);
 113
 114         /* Create the mutex we'll use to protect initialized_ctx_count */
 115         if (SMB_THREAD_CREATE_MUTEX("initialized_ctx_count_mutex",
 116                                     initialized_ctx_count_mutex) != 0) {
 117                 smb_panic("SMBC_module_init: "
 118                           "failed to create 'initialized_ctx_count' mutex");
 119         }
 120
 121         TALLOC_FREE(frame);
 122 }
 123
 124
 125 static void
 126 SMBC_module_terminate(void)
 127 {
 128         TALLOC_CTX *frame = talloc_stackframe();
 129         secrets_shutdown();
 130         gfree_all();
 131         SMBC_initialized = false;
 132         TALLOC_FREE(frame);
 133 }
 134
 135
 136 /*
 137  * Get a new empty handle to fill in with your own info
 138  */
 139 SMBCCTX *
 140 smbc_new_context(void)
 141 {
 142         SMBCCTX *context;
 143         TALLOC_CTX *frame = talloc_stackframe();
 144
 145         /* The first call to this function should initialize the module */
 146         SMB_THREAD_ONCE(&SMBC_initialized, SMBC_module_init, NULL);
 147
 148         /*
 149          * All newly added context fields should be placed in
 150          * SMBC_internal_data, not directly in SMBCCTX.
 151          */
 152         context = SMB_MALLOC_P(SMBCCTX);
 153         if (!context) {
 154                 TALLOC_FREE(frame);
 155                 errno = ENOMEM;
 156                 return NULL;
 157         }
 158
 159         ZERO_STRUCTP(context);
 160
 161         context->internal = SMB_MALLOC_P(struct SMBC_internal_data);
 162         if (!context->internal) {
 163                 TALLOC_FREE(frame);
 164                 SAFE_FREE(context);
 165                 errno = ENOMEM;
 166                 return NULL;
 167         }
 168
 169         /* Initialize the context and establish reasonable defaults */
 170         ZERO_STRUCTP(context->internal);
 171
 172         context->internal->lp_ctx = loadparm_init_s3(NULL,
 173                                                      loadparm_s3_helpers());
 174         if (context->internal->lp_ctx == NULL) {
 175                 SAFE_FREE(context->internal);
 176                 SAFE_FREE(context);
 177                 TALLOC_FREE(frame);
 178                 errno = ENOMEM;
 179                 return NULL;
 180         }
 181
 182         smbc_setDebug(context, 0);
 183         smbc_setTimeout(context, 20000);
 184         smbc_setPort(context, 0);
 185
 186         smbc_setOptionFullTimeNames(context, False);
 187         smbc_setOptionOpenShareMode(context, SMBC_SHAREMODE_DENY_NONE);
 188         smbc_setOptionSmbEncryptionLevel(context, SMBC_ENCRYPTLEVEL_DEFAULT);
 189         smbc_setOptionUseCCache(context, True);
 190         smbc_setOptionCaseSensitive(context, False);
 191         smbc_setOptionBrowseMaxLmbCount(context, 3);    /* # LMBs to query */
 192         smbc_setOptionUrlEncodeReaddirEntries(context, False);
 193         smbc_setOptionOneSharePerServer(context, False);
 194         smbc_setOptionPosixExtensions(context, false);
 195         if (getenv("LIBSMBCLIENT_NO_CCACHE") != NULL) {
 196                 smbc_setOptionUseCCache(context, false);
 197         }
 198
 199         smbc_setFunctionAuthData(context, SMBC_get_auth_data);
 200         smbc_setFunctionCheckServer(context, SMBC_check_server);
 201         smbc_setFunctionRemoveUnusedServer(context, SMBC_remove_unused_server);
 202
 203         smbc_setOptionUserData(context, NULL);
 204         smbc_setFunctionAddCachedServer(context, SMBC_add_cached_server);
 205         smbc_setFunctionGetCachedServer(context, SMBC_get_cached_server);
 206         smbc_setFunctionRemoveCachedServer(context, SMBC_remove_cached_server);
 207         smbc_setFunctionPurgeCachedServers(context, SMBC_purge_cached_servers);
 208
 209         smbc_setFunctionOpen(context, SMBC_open_ctx);
 210         smbc_setFunctionCreat(context, SMBC_creat_ctx);
 211         smbc_setFunctionRead(context, SMBC_read_ctx);
 212         smbc_setFunctionSplice(context, SMBC_splice_ctx);
 213         smbc_setFunctionWrite(context, SMBC_write_ctx);
 214         smbc_setFunctionClose(context, SMBC_close_ctx);
 215         smbc_setFunctionUnlink(context, SMBC_unlink_ctx);
 216         smbc_setFunctionRename(context, SMBC_rename_ctx);
 217         smbc_setFunctionLseek(context, SMBC_lseek_ctx);
 218         smbc_setFunctionFtruncate(context, SMBC_ftruncate_ctx);
 219         smbc_setFunctionStat(context, SMBC_stat_ctx);
 220         smbc_setFunctionStatVFS(context, SMBC_statvfs_ctx);
 221         smbc_setFunctionFstatVFS(context, SMBC_fstatvfs_ctx);
 222         smbc_setFunctionFstat(context, SMBC_fstat_ctx);
 223         smbc_setFunctionOpendir(context, SMBC_opendir_ctx);
 224         smbc_setFunctionClosedir(context, SMBC_closedir_ctx);
 225         smbc_setFunctionReaddir(context, SMBC_readdir_ctx);
 226         smbc_setFunctionReaddirPlus(context, SMBC_readdirplus_ctx);
 227         smbc_setFunctionReaddirPlus2(context, SMBC_readdirplus2_ctx);
 228         smbc_setFunctionGetdents(context, SMBC_getdents_ctx);
 229         smbc_setFunctionMkdir(context, SMBC_mkdir_ctx);
 230         smbc_setFunctionRmdir(context, SMBC_rmdir_ctx);
 231         smbc_setFunctionTelldir(context, SMBC_telldir_ctx);
 232         smbc_setFunctionLseekdir(context, SMBC_lseekdir_ctx);
 233         smbc_setFunctionFstatdir(context, SMBC_fstatdir_ctx);
 234         smbc_setFunctionNotify(context, SMBC_notify_ctx);
 235         smbc_setFunctionChmod(context, SMBC_chmod_ctx);
 236         smbc_setFunctionUtimes(context, SMBC_utimes_ctx);
 237         smbc_setFunctionSetxattr(context, SMBC_setxattr_ctx);
 238         smbc_setFunctionGetxattr(context, SMBC_getxattr_ctx);
 239         smbc_setFunctionRemovexattr(context, SMBC_removexattr_ctx);
 240         smbc_setFunctionListxattr(context, SMBC_listxattr_ctx);
 241
 242         smbc_setFunctionOpenPrintJob(context, SMBC_open_print_job_ctx);
 243         smbc_setFunctionPrintFile(context, SMBC_print_file_ctx);
 244         smbc_setFunctionListPrintJobs(context, SMBC_list_print_jobs_ctx);
 245         smbc_setFunctionUnlinkPrintJob(context, SMBC_unlink_print_job_ctx);
 246
 247         TALLOC_FREE(frame);
 248         return context;
 249 }
 250
 251 /*
 252  * Free a context
 253  *
 254  * Returns 0 on success. Otherwise returns 1, the SMBCCTX is _not_ freed
 255  * and thus you'll be leaking memory if not handled properly.
 256  *
 257  */
 258 int
 259 smbc_free_context(SMBCCTX *context,
 260                   int shutdown_ctx)
 261 {
 262         TALLOC_CTX *frame;
 263         if (!context) {
 264                 errno = EBADF;
 265                 return 1;
 266         }
 267
 268         frame = talloc_stackframe();
 269
 270         if (shutdown_ctx) {
 271                 SMBCFILE * f;
 272                 DEBUG(1,("Performing aggressive shutdown.\n"));
 273
 274                 f = context->internal->files;
 275                 while (f) {
 276                         SMBCFILE *next = f->next;
 277                         smbc_getFunctionClose(context)(context, f);
 278                         f = next;
 279                 }
 280                 context->internal->files = NULL;
 281
 282                 /* First try to remove the servers the nice way. */
 283                 if (smbc_getFunctionPurgeCachedServers(context)(context)) {
 284                         SMBCSRV * s;
 285                         SMBCSRV * next;
 286                         DEBUG(1, ("Could not purge all servers, "
 287                                   "Nice way shutdown failed.\n"));
 288                         s = context->internal->servers;
 289                         while (s) {
 290                                 DEBUG(1, ("Forced shutdown: %p (cli=%p)\n",
 291                                           s, s->cli));
 292                                 cli_shutdown(s->cli);
 293                                 smbc_getFunctionRemoveCachedServer(context)(context,
 294                                                                          s);
 295                                 next = s->next;
 296                                 DLIST_REMOVE(context->internal->servers, s);
 297                                 SAFE_FREE(s);
 298                                 s = next;
 299                         }
 300                         context->internal->servers = NULL;
 301                 }
 302         }
 303         else {
 304                 /* This is the polite way */
 305                 if (smbc_getFunctionPurgeCachedServers(context)(context)) {
 306                         DEBUG(1, ("Could not purge all servers, "
 307                                   "free_context failed.\n"));
 308                         errno = EBUSY;
 309                         TALLOC_FREE(frame);
 310                         return 1;
 311                 }
 312                 if (context->internal->servers) {
 313                         DEBUG(1, ("Active servers in context, "
 314                                   "free_context failed.\n"));
 315                         errno = EBUSY;
 316                         TALLOC_FREE(frame);
 317                         return 1;
 318                 }
 319                 if (context->internal->files) {
 320                         DEBUG(1, ("Active files in context, "
 321                                   "free_context failed.\n"));
 322                         errno = EBUSY;
 323                         TALLOC_FREE(frame);
 324                         return 1;
 325                 }
 326         }
 327
 328         /* Things we have to clean up */
 329         smbc_setWorkgroup(context, NULL);
 330         smbc_setNetbiosName(context, NULL);
 331         smbc_setUser(context, NULL);
 332
 333         DEBUG(3, ("Context %p successfully freed\n", context));
 334
 335         /* Free any DFS auth context. */
 336         TALLOC_FREE(context->internal->creds);
 337
 338         TALLOC_FREE(context->internal->lp_ctx);
 339         SAFE_FREE(context->internal);
 340         SAFE_FREE(context);
 341
 342         /* Protect access to the count of contexts in use */
 343         if (SMB_THREAD_LOCK(initialized_ctx_count_mutex) != 0) {
 344                 smb_panic("error locking 'initialized_ctx_count'");
 345         }
 346
 347         if (initialized_ctx_count) {
 348                 initialized_ctx_count--;
 349         }
 350
 351         if (initialized_ctx_count == 0) {
 352             SMBC_module_terminate();
 353         }
 354
 355         /* Unlock the mutex */
 356         if (SMB_THREAD_UNLOCK(initialized_ctx_count_mutex) != 0) {
 357                 smb_panic("error unlocking 'initialized_ctx_count'");
 358         }
 359
 360         TALLOC_FREE(frame);
 361         return 0;
 362 }
 363
 364
 365 /**
 366  * Deprecated interface.  Do not use.  Instead, use the various
 367  * smbc_setOption*() functions or smbc_setFunctionAuthDataWithContext().
 368  */
 369 void
 370 smbc_option_set(SMBCCTX *context,
 371                 char *option_name,
 372                 ... /* option_value */)
 373 {
 374         va_list ap;
 375         union {
 376                 int i;
 377                 bool b;
 378                 smbc_get_auth_data_with_context_fn auth_fn;
 379                 void *v;
 380                 const char *s;
 381         } option_value;
 382
 383         TALLOC_CTX *frame = talloc_stackframe();
 384
 385         va_start(ap, option_name);
 386
 387         if (strcmp(option_name, "debug_to_stderr") == 0) {
 388                 option_value.b = (bool) va_arg(ap, int);
 389                 smbc_setOptionDebugToStderr(context, option_value.b);
 390
 391         } else if (strcmp(option_name, "full_time_names") == 0) {
 392                 option_value.b = (bool) va_arg(ap, int);
 393                 smbc_setOptionFullTimeNames(context, option_value.b);
 394
 395         } else if (strcmp(option_name, "open_share_mode") == 0) {
 396                 option_value.i = va_arg(ap, int);
 397                 smbc_setOptionOpenShareMode(context, option_value.i);
 398
 399         } else if (strcmp(option_name, "auth_function") == 0) {
 400                 option_value.auth_fn =
 401                         va_arg(ap, smbc_get_auth_data_with_context_fn);
 402                 smbc_setFunctionAuthDataWithContext(context, option_value.auth_fn);
 403
 404         } else if (strcmp(option_name, "user_data") == 0) {
 405                 option_value.v = va_arg(ap, void *);
 406                 smbc_setOptionUserData(context, option_value.v);
 407
 408         } else if (strcmp(option_name, "smb_encrypt_level") == 0) {
 409                 option_value.s = va_arg(ap, const char *);
 410                 if (strcmp(option_value.s, "none") == 0) {
 411                         smbc_setOptionSmbEncryptionLevel(context,
 412                                                          SMBC_ENCRYPTLEVEL_NONE);
 413                 } else if (strcmp(option_value.s, "request") == 0) {
 414                         smbc_setOptionSmbEncryptionLevel(context,
 415                                                          SMBC_ENCRYPTLEVEL_REQUEST);
 416                 } else if (strcmp(option_value.s, "require") == 0) {
 417                         smbc_setOptionSmbEncryptionLevel(context,
 418                                                          SMBC_ENCRYPTLEVEL_REQUIRE);
 419                 }
 420
 421         } else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
 422                 option_value.i = va_arg(ap, int);
 423                 smbc_setOptionBrowseMaxLmbCount(context, option_value.i);
 424
 425         } else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
 426                 option_value.b = (bool) va_arg(ap, int);
 427                 smbc_setOptionUrlEncodeReaddirEntries(context, option_value.b);
 428
 429         } else if (strcmp(option_name, "one_share_per_server") == 0) {
 430                 option_value.b = (bool) va_arg(ap, int);
 431                 smbc_setOptionOneSharePerServer(context, option_value.b);
 432
 433         } else if (strcmp(option_name, "use_kerberos") == 0) {
 434                 option_value.b = (bool) va_arg(ap, int);
 435                 smbc_setOptionUseKerberos(context, option_value.b);
 436
 437         } else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
 438                 option_value.b = (bool) va_arg(ap, int);
 439                 smbc_setOptionFallbackAfterKerberos(context, option_value.b);
 440
 441         } else if (strcmp(option_name, "use_ccache") == 0) {
 442                 option_value.b = (bool) va_arg(ap, int);
 443                 smbc_setOptionUseCCache(context, option_value.b);
 444
 445         } else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
 446                 option_value.b = (bool) va_arg(ap, int);
 447                 smbc_setOptionNoAutoAnonymousLogin(context, option_value.b);
 448         }
 449
 450         va_end(ap);
 451         TALLOC_FREE(frame);
 452 }
 453
 454
 455 /*
 456  * Deprecated interface.  Do not use.  Instead, use the various
 457  * smbc_getOption*() functions.
 458  */
 459 void *
 460 smbc_option_get(SMBCCTX *context,
 461                 char *option_name)
 462 {
 463         if (strcmp(option_name, "debug_stderr") == 0) {
 464 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 465                 return (void *) (intptr_t) smbc_getOptionDebugToStderr(context);
 466 #else
 467                 return (void *) smbc_getOptionDebugToStderr(context);
 468 #endif
 469
 470         } else if (strcmp(option_name, "full_time_names") == 0) {
 471 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 472                 return (void *) (intptr_t) smbc_getOptionFullTimeNames(context);
 473 #else
 474                 return (void *) smbc_getOptionFullTimeNames(context);
 475 #endif
 476
 477         } else if (strcmp(option_name, "open_share_mode") == 0) {
 478 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 479                 return (void *) (intptr_t) smbc_getOptionOpenShareMode(context);
 480 #else
 481                 return (void *) smbc_getOptionOpenShareMode(context);
 482 #endif
 483
 484         } else if (strcmp(option_name, "auth_function") == 0) {
 485                 return (void *) smbc_getFunctionAuthDataWithContext(context);
 486
 487         } else if (strcmp(option_name, "user_data") == 0) {
 488                 return smbc_getOptionUserData(context);
 489
 490         } else if (strcmp(option_name, "smb_encrypt_level") == 0) {
 491                 switch(smbc_getOptionSmbEncryptionLevel(context))
 492                 {
 493                 case SMBC_ENCRYPTLEVEL_DEFAULT:
 494                         return discard_const_p(void, "default");
 495                 case 0:
 496                         return discard_const_p(void, "none");
 497                 case 1:
 498                         return discard_const_p(void, "request");
 499                 case 2:
 500                         return discard_const_p(void, "require");
 501                 }
 502
 503         } else if (strcmp(option_name, "smb_encrypt_on") == 0) {
 504                 SMBCSRV *s;
 505                 unsigned int num_servers = 0;
 506
 507                 for (s = context->internal->servers; s; s = s->next) {
 508                         num_servers++;
 509                         if (!cli_state_is_encryption_on(s->cli)) {
 510                                 return (void *)false;
 511                         }
 512                 }
 513 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 514                 return (void *) (intptr_t) (bool) (num_servers > 0);
 515 #else
 516                 return (void *) (bool) (num_servers > 0);
 517 #endif
 518
 519         } else if (strcmp(option_name, "browse_max_lmb_count") == 0) {
 520 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 521                 return (void *) (intptr_t) smbc_getOptionBrowseMaxLmbCount(context);
 522 #else
 523                 return (void *) smbc_getOptionBrowseMaxLmbCount(context);
 524 #endif
 525
 526         } else if (strcmp(option_name, "urlencode_readdir_entries") == 0) {
 527 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 528                 return (void *)(intptr_t) smbc_getOptionUrlEncodeReaddirEntries(context);
 529 #else
 530                 return (void *) (bool) smbc_getOptionUrlEncodeReaddirEntries(context);
 531 #endif
 532
 533         } else if (strcmp(option_name, "one_share_per_server") == 0) {
 534 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 535                 return (void *) (intptr_t) smbc_getOptionOneSharePerServer(context);
 536 #else
 537                 return (void *) (bool) smbc_getOptionOneSharePerServer(context);
 538 #endif
 539
 540         } else if (strcmp(option_name, "use_kerberos") == 0) {
 541 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 542                 return (void *) (intptr_t) smbc_getOptionUseKerberos(context);
 543 #else
 544                 return (void *) (bool) smbc_getOptionUseKerberos(context);
 545 #endif
 546
 547         } else if (strcmp(option_name, "fallback_after_kerberos") == 0) {
 548 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 549                 return (void *)(intptr_t) smbc_getOptionFallbackAfterKerberos(context);
 550 #else
 551                 return (void *) (bool) smbc_getOptionFallbackAfterKerberos(context);
 552 #endif
 553
 554         } else if (strcmp(option_name, "use_ccache") == 0) {
 555 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 556                 return (void *) (intptr_t) smbc_getOptionUseCCache(context);
 557 #else
 558                 return (void *) (bool) smbc_getOptionUseCCache(context);
 559 #endif
 560
 561         } else if (strcmp(option_name, "no_auto_anonymous_login") == 0) {
 562 #if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
 563                 return (void *) (intptr_t) smbc_getOptionNoAutoAnonymousLogin(context);
 564 #else
 565                 return (void *) (bool) smbc_getOptionNoAutoAnonymousLogin(context);
 566 #endif
 567         }
 568
 569         return NULL;
 570 }
 571
 572
 573 /*
 574  * Initialize the library, etc.
 575  *
 576  * We accept a struct containing handle information.
 577  * valid values for info->debug from 0 to 100,
 578  * and insist that info->fn must be non-null.
 579  */
 580 SMBCCTX *
 581 smbc_init_context(SMBCCTX *context)
 582 {
 583         int pid;
 584         TALLOC_CTX *frame;
 585
 586         if (!context) {
 587                 errno = EBADF;
 588                 return NULL;
 589         }
 590
 591         /* Do not initialise the same client twice */
 592         if (context->internal->initialized) {
 593                 return NULL;
 594         }
 595
 596         frame = talloc_stackframe();
 597
 598         if ((!smbc_getFunctionAuthData(context) &&
 599              !smbc_getFunctionAuthDataWithContext(context)) ||
 600             smbc_getDebug(context) < 0 ||
 601             smbc_getDebug(context) > 100) {
 602
 603                 TALLOC_FREE(frame);
 604                 errno = EINVAL;
 605                 return NULL;
 606
 607         }
 608
 609         if (!smbc_getUser(context)) {
 610                 /*
 611                  * FIXME: Is this the best way to get the user info?
 612                  */
 613                 char *user = getenv("USER");
 614                 /* walk around as "guest" if no username can be found */
 615                 if (!user) {
 616                         user = SMB_STRDUP("guest");
 617                 } else {
 618                         user = SMB_STRDUP(user);
 619                 }
 620
 621                 if (!user) {
 622                         TALLOC_FREE(frame);
 623                         errno = ENOMEM;
 624                         return NULL;
 625                 }
 626
 627                 smbc_setUser(context, user);
 628                 SAFE_FREE(user);
 629
 630                 if (!smbc_getUser(context)) {
 631                         TALLOC_FREE(frame);
 632                         errno = ENOMEM;
 633                         return NULL;
 634                 }
 635         }
 636
 637         if (!smbc_getNetbiosName(context)) {
 638                 /*
 639                  * We try to get our netbios name from the config. If that
 640                  * fails we fall back on constructing our netbios name from
 641                  * our hostname etc
 642                  */
 643                 char *netbios_name;
 644                 if (lp_netbios_name()) {
 645                         netbios_name = SMB_STRDUP(lp_netbios_name());
 646                 } else {
 647                         /*
 648                          * Hmmm, I want to get hostname as well, but I am too
 649                          * lazy for the moment
 650                          */
 651                         pid = getpid();
 652                         netbios_name = (char *)SMB_MALLOC(17);
 653                         if (!netbios_name) {
 654                                 TALLOC_FREE(frame);
 655                                 errno = ENOMEM;
 656                                 return NULL;
 657                         }
 658                         slprintf(netbios_name, 16,
 659                                  "smbc%s%d", smbc_getUser(context), pid);
 660                 }
 661
 662                 if (!netbios_name) {
 663                         TALLOC_FREE(frame);
 664                         errno = ENOMEM;
 665                         return NULL;
 666                 }
 667
 668                 smbc_setNetbiosName(context, netbios_name);
 669                 SAFE_FREE(netbios_name);
 670
 671                 if (!smbc_getNetbiosName(context)) {
 672                         TALLOC_FREE(frame);
 673                         errno = ENOMEM;
 674                         return NULL;
 675                 }
 676         }
 677
 678         DEBUG(1, ("Using netbios name %s.\n", smbc_getNetbiosName(context)));
 679
 680         if (!smbc_getWorkgroup(context)) {
 681                 const char *workgroup;
 682
 683                 if (lp_workgroup()) {
 684                         workgroup = lp_workgroup();
 685                 } else {
 686                         /* TODO: Think about a decent default workgroup */
 687                         workgroup = "samba";
 688                 }
 689
 690                 smbc_setWorkgroup(context, workgroup);
 691
 692                 if (!smbc_getWorkgroup(context)) {
 693                         TALLOC_FREE(frame);
 694                         errno = ENOMEM;
 695                         return NULL;
 696                 }
 697         }
 698
 699         DEBUG(1, ("Using workgroup %s.\n", smbc_getWorkgroup(context)));
 700
 701         /* shortest timeout is 1 second */
 702         if (smbc_getTimeout(context) > 0 && smbc_getTimeout(context) < 1000)
 703                 smbc_setTimeout(context, 1000);
 704
 705         context->internal->initialized = True;
 706
 707         /* Protect access to the count of contexts in use */
 708         if (SMB_THREAD_LOCK(initialized_ctx_count_mutex) != 0) {
 709                 smb_panic("error locking 'initialized_ctx_count'");
 710         }
 711
 712         initialized_ctx_count++;
 713
 714         /* Unlock the mutex */
 715         if (SMB_THREAD_UNLOCK(initialized_ctx_count_mutex) != 0) {
 716                 smb_panic("error unlocking 'initialized_ctx_count'");
 717         }
 718
 719         TALLOC_FREE(frame);
 720         return context;
 721 }
 722
 723
 724 /* Return the version of samba, and thus libsmbclient */
 725 const char *
 726 smbc_version(void)
 727 {
 728         return samba_version_string();
 729 }
 730
 731 /*
 732  * Set the credentials so DFS will work when following referrals.
 733  * This function is broken and must be removed. No SMBCCTX arg...
 734  * JRA.
 735  */
 736
 737 void
 738 smbc_set_credentials(const char *workgroup,
 739                         const char *user,
 740                         const char *password,
 741                         smbc_bool use_kerberos,
 742                         const char *signing_state)
 743 {
 744         d_printf("smbc_set_credentials is obsolete. Replace with smbc_set_credentials_with_fallback().\n");
 745 }
 746
 747 void smbc_set_credentials_with_fallback(SMBCCTX *context,
 748                                         const char *workgroup,
 749                                         const char *user,
 750                                         const char *password)
 751 {
 752         struct cli_credentials *creds = NULL;
 753         enum credentials_use_kerberos kerberos_state =
 754                 CRED_USE_KERBEROS_DISABLED;
 755
 756         if (! context) {
 757
 758                 return;
 759         }
 760
 761         if (! workgroup || ! *workgroup) {
 762                 workgroup = smbc_getWorkgroup(context);
 763         }
 764
 765         if (! user) {
 766                 user = smbc_getUser(context);
 767         }
 768
 769         if (! password) {
 770                 password = "";
 771         }
 772
 773         creds = cli_credentials_init(NULL);
 774         if (creds == NULL) {
 775                 DEBUG(0, ("smbc_set_credentials_with_fallback: allocation fail\n"));
 776                 return;
 777         }
 778
 779         cli_credentials_set_conf(creds, context->internal->lp_ctx);
 780
 781         if (smbc_getOptionUseKerberos(context)) {
 782                 kerberos_state = CRED_USE_KERBEROS_REQUIRED;
 783
 784                 if (smbc_getOptionFallbackAfterKerberos(context)) {
 785                         kerberos_state = CRED_USE_KERBEROS_DESIRED;
 786                 }
 787         }
 788
 789         cli_credentials_set_username(creds, user, CRED_SPECIFIED);
 790         cli_credentials_set_password(creds, password, CRED_SPECIFIED);
 791         cli_credentials_set_domain(creds, workgroup, CRED_SPECIFIED);
 792         cli_credentials_set_kerberos_state(creds,
 793                                            kerberos_state,
 794                                            CRED_SPECIFIED);
 795         if (smbc_getOptionUseCCache(context)) {
 796                 cli_credentials_add_gensec_features(creds,
 797                                                     GENSEC_FEATURE_NTLM_CCACHE,
 798                                                     CRED_SPECIFIED);
 799         }
 800
 801         TALLOC_FREE(context->internal->creds);
 802         context->internal->creds = creds;
 803 }