git.sur5r.net Git - openldap/blob - servers/slapd/backend.c

   1 /* backend.c - routines for dealing with back-end databases */
   2
   3
   4 #include "portable.h"
   5
   6 #include <stdio.h>
   7
   8 #include <ac/string.h>
   9 #include <ac/socket.h>
  10
  11 #include <sys/stat.h>
  12
  13 #include "slap.h"
  14
  15 #ifdef SLAPD_LDBM
  16 #include "back-ldbm/external.h"
  17 #endif
  18 #ifdef SLAPD_BDB2
  19 #include "back-bdb2/external.h"
  20 #endif
  21 #ifdef SLAPD_PASSWD
  22 #include "back-passwd/external.h"
  23 #endif
  24 #ifdef SLAPD_PERL
  25 #include "back-perl/external.h"
  26 #endif
  27 #ifdef SLAPD_SHELL
  28 #include "back-shell/external.h"
  29 #endif
  30
  31 static BackendInfo binfo[] = {
  32 #ifdef SLAPD_LDBM
  33         {"ldbm",        ldbm_back_initialize},
  34 #endif
  35 #ifdef SLAPD_BDB2
  36         {"bdb2",        bdb2_back_initialize},
  37 #endif
  38 #ifdef SLAPD_PASSWD
  39         {"passwd",      passwd_back_initialize},
  40 #endif
  41 #ifdef SLAPD_PERL
  42         {"perl",        perl_back_initialize},
  43 #endif
  44 #ifdef SLAPD_SHELL
  45         {"shell",       shell_back_initialize},
  46 #endif
  47         {NULL}
  48 };
  49
  50 int                     nBackendInfo = 0;
  51 BackendInfo     *backendInfo = NULL;
  52
  53 int                     nBackendDB = 0;
  54 BackendDB       *backendDB = NULL;
  55
  56 int backend_init(void)
  57 {
  58         int rc = -1;
  59
  60         if((nBackendInfo != 0) || (backendInfo != NULL)) {
  61                 /* already initialized */
  62                 Debug( LDAP_DEBUG_ANY,
  63                         "backend_init: already initialized.\n", 0, 0, 0 );
  64                 return -1;
  65         }
  66
  67         for( ;
  68                 binfo[nBackendInfo].bi_type !=  NULL;
  69                 nBackendInfo++ )
  70         {
  71                 rc = binfo[nBackendInfo].bi_init(
  72                         &binfo[nBackendInfo] );
  73
  74                 if(rc != 0) {
  75                         Debug( LDAP_DEBUG_ANY,
  76                                 "backend_init: initialized for type \"%s\"\n",
  77                                         binfo[nBackendInfo].bi_type, 0, 0 );
  78
  79                         /* destroy those we've already inited */
  80                         for( nBackendInfo--;
  81                                 nBackendInfo >= 0 ;
  82                                 nBackendInfo-- )
  83                         {
  84                                 if ( binfo[nBackendInfo].bi_destroy ) {
  85                                         binfo[nBackendInfo].bi_destroy(
  86                                                 &binfo[nBackendInfo] );
  87                                 }
  88                         }
  89                         return rc;
  90                 }
  91         }
  92
  93         if ( nBackendInfo > 0) {
  94                 backendInfo = binfo;
  95                 return 0;
  96         }
  97
  98         Debug( LDAP_DEBUG_ANY,
  99                 "backend_init: failed\n",
 100                 0, 0, 0 );
 101
 102         return rc;
 103 }
 104
 105 int backend_startup(int n)
 106 {
 107         int i;
 108         int rc = 0;
 109
 110         if( ! ( nBackendDB > 0 ) ) {
 111                 /* no databases */
 112                 Debug( LDAP_DEBUG_ANY,
 113                         "backend_startup: %d databases to startup.\n",
 114                         nBackendDB, 0, 0 );
 115                 return 1;
 116         }
 117
 118         if(n >= 0) {
 119                 /* startup a specific backend database */
 120                 Debug( LDAP_DEBUG_TRACE,
 121                         "backend_startup: starting database %d\n",
 122                         n, 0, 0 );
 123
 124                 /* make sure, n does not exceed the number of backend databases */
 125                 if ( n >= nbackends ) {
 126
 127                         Debug( LDAP_DEBUG_ANY,
 128                                 "backend_startup: database number %d exceeding maximum (%d)\n",
 129                                 n, nbackends, 0 );
 130                         return 1;
 131                 }
 132
 133                 if ( backendDB[n].bd_info->bi_open ) {
 134                         rc = backendDB[n].bd_info->bi_open(
 135                                 backendDB[n].bd_info );
 136                 }
 137
 138                 if(rc != 0) {
 139                         Debug( LDAP_DEBUG_ANY,
 140                                 "backend_startup: bi_open failed!\n",
 141                                 0, 0, 0 );
 142                         return rc;
 143                 }
 144
 145                 if ( backendDB[n].bd_info->bi_db_open ) {
 146                         rc = backendDB[n].bd_info->bi_db_open(
 147                                 &backendDB[n] );
 148                 }
 149
 150                 if(rc != 0) {
 151                         Debug( LDAP_DEBUG_ANY,
 152                                 "backend_startup: bi_db_open failed!\n",
 153                                 0, 0, 0 );
 154                         return rc;
 155                 }
 156
 157                 return rc;
 158         }
 159
 160         /* open each backend type */
 161         for( i = 0; i < nBackendInfo; i++ ) {
 162                 if( backendInfo[i].bi_nDB == 0) {
 163                         /* no database of this type, don't open */
 164                         continue;
 165                 }
 166
 167                 if( backendInfo[i].bi_open ) {
 168                         rc = backendInfo[i].bi_open(
 169                                 &backendInfo[i] );
 170                 }
 171
 172                 if(rc != 0) {
 173                         Debug( LDAP_DEBUG_ANY,
 174                                 "backend_startup: bi_open %d failed!\n",
 175                                 i, 0, 0 );
 176                         return rc;
 177                 }
 178         }
 179
 180         /* open each backend database */
 181         for( i = 0; i < nBackendDB; i++ ) {
 182                 if ( backendDB[i].bd_info->bi_db_open ) {
 183                         rc = backendDB[i].bd_info->bi_db_open(
 184                                 &backendDB[i] );
 185                 }
 186
 187                 if(rc != 0) {
 188                         Debug( LDAP_DEBUG_ANY,
 189                                 "backend_startup: bi_db_open %d failed!\n",
 190                                 i, 0, 0 );
 191                         return rc;
 192                 }
 193         }
 194
 195         return rc;
 196 }
 197
 198 int backend_shutdown(int n)
 199 {
 200         int i;
 201         int rc = 0;
 202
 203         if(n >= 0) {
 204                 /* shutdown a specific backend database */
 205
 206                 /* make sure, n does not exceed the number of backend databases */
 207                 if ( n >= nbackends ) {
 208
 209                         Debug( LDAP_DEBUG_ANY,
 210                                 "backend_startup: database number %d exceeding maximum (%d)\n",
 211                                 n, nbackends, 0 );
 212                         return 1;
 213                 }
 214
 215                 if ( backendDB[n].bd_info->bi_nDB == 0 ) {
 216                         /* no database of this type, we never opened it */
 217                         return 0;
 218                 }
 219
 220                 if ( backendDB[n].bd_info->bi_db_close ) {
 221                         backendDB[n].bd_info->bi_db_close(
 222                                 &backendDB[n] );
 223                 }
 224
 225                 if( backendDB[n].bd_info->bi_close ) {
 226                         backendDB[n].bd_info->bi_close(
 227                                 backendDB[n].bd_info );
 228                 }
 229
 230                 return 0;
 231         }
 232
 233         /* close each backend database */
 234         for( i = 0; i < nBackendDB; i++ ) {
 235                 BackendInfo  *bi;
 236
 237                 if ( backendDB[i].bd_info->bi_db_close ) {
 238                         backendDB[i].bd_info->bi_db_close(
 239                                 &backendDB[i] );
 240                 }
 241
 242                 if(rc != 0) {
 243                         Debug( LDAP_DEBUG_ANY,
 244                                 "backend_close: bi_close %s failed!\n",
 245                                 bi->bi_type, 0, 0 );
 246                 }
 247         }
 248
 249         /* close each backend type */
 250         for( i = 0; i < nBackendInfo; i++ ) {
 251                 if( backendInfo[i].bi_nDB == 0 ) {
 252                         /* no database of this type */
 253                         continue;
 254                 }
 255
 256                 if( backendInfo[i].bi_close ) {
 257                         backendInfo[i].bi_close(
 258                                 &backendInfo[i] );
 259                 }
 260         }
 261
 262         return 0;
 263 }
 264
 265 int backend_destroy(void)
 266 {
 267         int i;
 268
 269         /* destroy each backend database */
 270         for( i = 0; i < nBackendDB; i++ ) {
 271                 if ( backendDB[i].bd_info->bi_db_destroy ) {
 272                         backendDB[i].bd_info->bi_db_destroy(
 273                                 &backendDB[i] );
 274                 }
 275         }
 276
 277         /* destroy each backend type */
 278         for( i = 0; i < nBackendInfo; i++ ) {
 279                 if( backendInfo[i].bi_destroy ) {
 280                         backendInfo[i].bi_destroy(
 281                                 &backendInfo[i] );
 282                 }
 283         }
 284
 285         return 0;
 286 }
 287
 288 BackendInfo* backend_info(char *type)
 289 {
 290         int i;
 291
 292         /* search for the backend type */
 293         for( i = 0; i < nBackendInfo; i++ ) {
 294                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 295                         return &backendInfo[i];
 296                 }
 297         }
 298
 299         return NULL;
 300 }
 301
 302
 303 BackendDB *
 304 backend_db_init(
 305     char        *type
 306 )
 307 {
 308         Backend *be;
 309         BackendInfo *bi = backend_info(type);
 310         int     rc = 0;
 311
 312         if( bi == NULL ) {
 313                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 314                 return NULL;
 315         }
 316
 317         backendDB = (BackendDB *) ch_realloc(
 318                         (char *) backendDB,
 319                     (nBackendDB + 1) * sizeof(Backend) );
 320
 321         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 322
 323         be = &backends[nbackends++];
 324
 325         be->bd_info = bi;
 326         be->be_sizelimit = defsize;
 327         be->be_timelimit = deftime;
 328
 329         if(bi->bi_db_init) {
 330                 rc = bi->bi_db_init( be );
 331         }
 332
 333         if(rc != 0) {
 334                 fprintf( stderr, "database init failed (%s)\n", type );
 335                 nbackends--;
 336                 return NULL;
 337         }
 338
 339         bi->bi_nDB++;
 340         return( be );
 341 }
 342
 343 void
 344 be_db_close( void )
 345 {
 346         int     i;
 347
 348         for ( i = 0; i < nbackends; i++ ) {
 349                 if ( backends[i].bd_info->bi_db_close != NULL ) {
 350                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 351                 }
 352         }
 353 }
 354
 355 Backend *
 356 select_backend( char * dn )
 357 {
 358         int     i, j, len, dnlen;
 359
 360         dnlen = strlen( dn );
 361         for ( i = 0; i < nbackends; i++ ) {
 362                 for ( j = 0; backends[i].be_suffix != NULL &&
 363                     backends[i].be_suffix[j] != NULL; j++ )
 364                 {
 365                         len = strlen( backends[i].be_suffix[j] );
 366
 367                         if ( len > dnlen ) {
 368                                 continue;
 369                         }
 370
 371                         if ( strcmp( backends[i].be_suffix[j],
 372                             dn + (dnlen - len) ) == 0 ) {
 373                                 return( &backends[i] );
 374                         }
 375                 }
 376         }
 377
 378         /* if no proper suffix could be found then check for aliases */
 379         for ( i = 0; i < nbackends; i++ ) {
 380                 for ( j = 0;
 381                       backends[i].be_suffixAlias != NULL &&
 382                       backends[i].be_suffixAlias[j] != NULL;
 383                       j += 2 )
 384                 {
 385                         len = strlen( backends[i].be_suffixAlias[j] );
 386
 387                         if ( len > dnlen ) {
 388                                 continue;
 389                         }
 390
 391                         if ( strcmp( backends[i].be_suffixAlias[j],
 392                             dn + (dnlen - len) ) == 0 ) {
 393                                 return( &backends[i] );
 394                         }
 395                 }
 396         }
 397
 398 #ifdef LDAP_ALLOW_NULL_SEARCH_BASE
 399         /* Add greg@greg.rim.or.jp
 400          * It's quick hack for cheap client
 401          * Some browser offer a NULL base at ldap_search
 402          *
 403          * Should only be used as a last resort. -Kdz
 404          */
 405         if(dnlen == 0) {
 406                 Debug( LDAP_DEBUG_TRACE,
 407                         "select_backend: use default backend\n", 0, 0, 0 );
 408                 return( &backends[0] );
 409         }
 410 #endif /* LDAP_ALLOW_NULL_SEARCH_BASE */
 411
 412         return( NULL );
 413 }
 414
 415 int
 416 be_issuffix(
 417     Backend     *be,
 418     char        *suffix
 419 )
 420 {
 421         int     i;
 422
 423         for ( i = 0; be->be_suffix != NULL && be->be_suffix[i] != NULL; i++ ) {
 424                 if ( strcmp( be->be_suffix[i], suffix ) == 0 ) {
 425                         return( 1 );
 426                 }
 427         }
 428
 429         return( 0 );
 430 }
 431
 432 int
 433 be_isroot( Backend *be, char *ndn )
 434 {
 435         int rc;
 436
 437         if ( ndn == NULL || be->be_root_ndn == NULL ) {
 438                 return( 0 );
 439         }
 440
 441         rc = strcmp( be->be_root_ndn, ndn ) ? 0 : 1;
 442
 443         return(rc);
 444 }
 445
 446 char *
 447 be_root_dn( Backend *be )
 448 {
 449         int rc;
 450
 451         if ( be->be_root_dn == NULL ) {
 452                 return( "" );
 453         }
 454
 455         return be->be_root_dn;
 456 }
 457
 458 int
 459 be_isroot_pw( Backend *be, char *ndn, struct berval *cred )
 460 {
 461         int result;
 462
 463         if ( ! be_isroot( be, ndn ) ) {
 464                 return( 0 );
 465         }
 466
 467 #ifdef SLAPD_CRYPT
 468         ldap_pvt_thread_mutex_lock( &crypt_mutex );
 469 #endif
 470
 471         result = lutil_passwd( cred->bv_val, be->be_root_pw );
 472
 473 #ifdef SLAPD_CRYPT
 474         ldap_pvt_thread_mutex_unlock( &crypt_mutex );
 475 #endif
 476
 477         return result == 0;
 478 }
 479
 480 int
 481 backend_unbind(
 482         Connection   *conn,
 483         Operation    *op
 484 )
 485 {
 486         int     i;
 487
 488         for ( i = 0; i < nbackends; i++ ) {
 489                 if ( backends[i].be_unbind != NULL ) {
 490                         (*backends[i].be_unbind)( &backends[i], conn, op );
 491                 }
 492         }
 493
 494         return 0;
 495 }
 496
 497 #ifdef SLAPD_ACLGROUPS
 498 int
 499 backend_group(
 500         Backend *be,
 501         Entry   *target,
 502         char    *gr_ndn,
 503         char    *op_ndn,
 504         char    *objectclassValue,
 505         char    *groupattrName
 506 )
 507 {
 508         if (be->be_group)
 509                 return( be->be_group(be, target, gr_ndn, op_ndn,
 510                         objectclassValue, groupattrName) );
 511         else
 512                 return(1);
 513 }
 514 #endif