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

   1 /* lastmod.c - returns last modification info */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 2004-2005 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* ACKNOWLEDGEMENTS:
  16  * This work was initially developed by Pierangelo Masarati for inclusion in
  17  * OpenLDAP Software.
  18  */
  19
  20 #include "portable.h"
  21
  22 #ifdef SLAPD_OVER_LASTMOD
  23
  24 #include <stdio.h>
  25
  26 #include <ac/string.h>
  27 #include <ac/socket.h>
  28
  29 #include "slap.h"
  30 #include "lutil.h"
  31
  32 typedef struct lastmod_info_t {
  33         struct berval           lmi_rdnvalue;
  34         Entry                   *lmi_e;
  35         ldap_pvt_thread_mutex_t lmi_entry_mutex;
  36         int                     lmi_enabled;
  37 } lastmod_info_t;
  38
  39 struct lastmod_schema_t {
  40         ObjectClass             *lms_oc_lastmod;
  41         AttributeDescription    *lms_ad_lastmodDN;
  42         AttributeDescription    *lms_ad_lastmodType;
  43         AttributeDescription    *lms_ad_lastmodEnabled;
  44 } lastmod_schema;
  45
  46 enum lastmodType_e {
  47         LASTMOD_ADD = 0,
  48         LASTMOD_DELETE,
  49         LASTMOD_EXOP,
  50         LASTMOD_MODIFY,
  51         LASTMOD_MODRDN,
  52         LASTMOD_UNKNOWN
  53 };
  54
  55 struct berval lastmodType[] = {
  56         BER_BVC( "add" ),
  57         BER_BVC( "delete" ),
  58         BER_BVC( "exop" ),
  59         BER_BVC( "modify" ),
  60         BER_BVC( "modrdn" ),
  61         BER_BVC( "unknown" ),
  62         BER_BVNULL
  63 };
  64
  65 static struct m_s {
  66         char                    *name;
  67         char                    *schema;
  68         slap_mask_t             flags;
  69         int                     offset;
  70 } moc[] = {
  71         { "lastmod", "( 1.3.6.1.4.1.4203.666.3.13"
  72                 "NAME 'lastmod' "
  73                 "DESC 'OpenLDAP per-database last modification monitoring' "
  74                 "STRUCTURAL "
  75                 "SUP top "
  76                 "MUST cn "
  77                 "MAY ( "
  78                         "lastmodDN "
  79                         "$ lastmodType "
  80                         "$ description "
  81                         "$ seeAlso "
  82                 ") )", SLAP_OC_OPERATIONAL|SLAP_OC_HIDE,
  83                 offsetof( struct lastmod_schema_t, lms_oc_lastmod ) },
  84         { NULL }
  85 }, mat[] = {
  86         { "lastmodDN", "( 1.3.6.1.4.1.4203.666.1.28"
  87                 "NAME 'lastmodDN' "
  88                 "DESC 'DN of last modification' "
  89                 "EQUALITY distinguishedNameMatch "
  90                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 "
  91                 "NO-USER-MODIFICATION "
  92                 "USAGE directoryOperation )", SLAP_AT_HIDE,
  93                 offsetof( struct lastmod_schema_t, lms_ad_lastmodDN ) },
  94         { "lastmodType", "( 1.3.6.1.4.1.4203.666.1.29"
  95                 "NAME 'lastmodType' "
  96                 "DESC 'Type of last modification' "
  97                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 "
  98                 "EQUALITY caseIgnoreMatch "
  99                 "SINGLE-VALUE "
 100                 "NO-USER-MODIFICATION "
 101                 "USAGE directoryOperation )", SLAP_AT_HIDE,
 102                 offsetof( struct lastmod_schema_t, lms_ad_lastmodType ) },
 103         { "lastmodEnabled", "( 1.3.6.1.4.1.4203.666.1.30"
 104                 "NAME 'lastmodEnabled' "
 105                 "DESC 'Lastmod overlay state' "
 106                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 "
 107                 "EQUALITY booleanMatch "
 108                 "SINGLE-VALUE )", 0,
 109                 offsetof( struct lastmod_schema_t, lms_ad_lastmodEnabled ) },
 110         { NULL }
 111
 112         /* FIXME: what about UUID of last modified entry? */
 113 };
 114
 115 static int
 116 lastmod_search( Operation *op, SlapReply *rs )
 117 {
 118         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 119         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 120         int                     rc;
 121
 122         /* if we get here, it must be a success */
 123         rs->sr_err = LDAP_SUCCESS;
 124
 125         ldap_pvt_thread_mutex_lock( &lmi->lmi_entry_mutex );
 126
 127         rc = test_filter( op, lmi->lmi_e, op->oq_search.rs_filter );
 128         if ( rc == LDAP_COMPARE_TRUE ) {
 129                 rs->sr_attrs = op->ors_attrs;
 130                 rs->sr_flags = 0;
 131                 rs->sr_entry = lmi->lmi_e;
 132                 rs->sr_err = send_search_entry( op, rs );
 133                 rs->sr_entry = NULL;
 134                 rs->sr_flags = 0;
 135                 rs->sr_attrs = NULL;
 136         }
 137
 138         ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 139
 140         send_ldap_result( op, rs );
 141
 142         return 0;
 143 }
 144
 145 static int
 146 lastmod_compare( Operation *op, SlapReply *rs )
 147 {
 148         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 149         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 150         Attribute               *a;
 151
 152         ldap_pvt_thread_mutex_lock( &lmi->lmi_entry_mutex );
 153
 154         if ( get_assert( op ) &&
 155                 ( test_filter( op, lmi->lmi_e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
 156         {
 157                 rs->sr_err = LDAP_ASSERTION_FAILED;
 158                 goto return_results;
 159         }
 160
 161         rs->sr_err = access_allowed( op, lmi->lmi_e, op->oq_compare.rs_ava->aa_desc,
 162                 &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
 163         if ( ! rs->sr_err ) {
 164                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 165                 goto return_results;
 166         }
 167
 168         rs->sr_err = LDAP_NO_SUCH_ATTRIBUTE;
 169
 170         for ( a = attr_find( lmi->lmi_e->e_attrs, op->oq_compare.rs_ava->aa_desc );
 171                 a != NULL;
 172                 a = attr_find( a->a_next, op->oq_compare.rs_ava->aa_desc ) )
 173         {
 174                 rs->sr_err = LDAP_COMPARE_FALSE;
 175
 176                 if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
 177                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 178                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 179                         a->a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
 180                 {
 181                         rs->sr_err = LDAP_COMPARE_TRUE;
 182                         break;
 183                 }
 184         }
 185
 186 return_results:;
 187
 188         ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 189
 190         send_ldap_result( op, rs );
 191
 192         if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
 193                 rs->sr_err = LDAP_SUCCESS;
 194         }
 195
 196         return rs->sr_err;
 197 }
 198
 199 static int
 200 lastmod_exop( Operation *op, SlapReply *rs )
 201 {
 202         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 203
 204         /* Temporary */
 205
 206         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 207         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 208         rs->sr_text = "not allowed within namingContext";
 209         send_ldap_result( op, rs );
 210         rs->sr_text = NULL;
 211
 212         return -1;
 213 }
 214
 215 static int
 216 lastmod_modify( Operation *op, SlapReply *rs )
 217 {
 218         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 219         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 220         Modifications           *ml;
 221
 222         ldap_pvt_thread_mutex_lock( &lmi->lmi_entry_mutex );
 223
 224         if ( !acl_check_modlist( op, lmi->lmi_e, op->orm_modlist ) ) {
 225                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 226                 goto cleanup;
 227         }
 228
 229         for ( ml = op->orm_modlist; ml; ml = ml->sml_next ) {
 230                 Attribute       *a;
 231
 232                 if ( ml->sml_desc != lastmod_schema.lms_ad_lastmodEnabled ) {
 233                         continue;
 234                 }
 235
 236                 if ( ml->sml_op != LDAP_MOD_REPLACE ) {
 237                         rs->sr_text = "unsupported mod type";
 238                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 239                         goto cleanup;
 240                 }
 241
 242                 a = attr_find( lmi->lmi_e->e_attrs, ml->sml_desc );
 243
 244                 if ( a == NULL ) {
 245                         rs->sr_text = "lastmod overlay internal error";
 246                         rs->sr_err = LDAP_OTHER;
 247                         goto cleanup;
 248                 }
 249
 250                 ch_free( a->a_vals[ 0 ].bv_val );
 251                 ber_dupbv( &a->a_vals[ 0 ], &ml->sml_values[ 0 ] );
 252                 if ( a->a_nvals ) {
 253                         ch_free( a->a_nvals[ 0 ].bv_val );
 254                         if ( ml->sml_nvalues && !BER_BVISNULL( &ml->sml_nvalues[ 0 ] ) ) {
 255                                 ber_dupbv( &a->a_nvals[ 0 ], &ml->sml_nvalues[ 0 ] );
 256                         } else {
 257                                 ber_dupbv( &a->a_nvals[ 0 ], &ml->sml_values[ 0 ] );
 258                         }
 259                 }
 260
 261                 if ( strcmp( ml->sml_values[ 0 ].bv_val, "TRUE" ) == 0 ) {
 262                         lmi->lmi_enabled = 1;
 263                 } else if ( strcmp( ml->sml_values[ 0 ].bv_val, "FALSE" ) == 0 ) {
 264                         lmi->lmi_enabled = 0;
 265                 } else {
 266                         assert( 0 );
 267                 }
 268         }
 269
 270         rs->sr_err = LDAP_SUCCESS;
 271
 272 cleanup:;
 273         ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 274
 275         send_ldap_result( op, rs );
 276         rs->sr_text = NULL;
 277
 278         return rs->sr_err;
 279 }
 280
 281 static int
 282 lastmod_op_func( Operation *op, SlapReply *rs )
 283 {
 284         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 285         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 286         Modifications           *ml;
 287
 288         if ( dn_match( &op->o_req_ndn, &lmi->lmi_e->e_nname ) ) {
 289                 switch ( op->o_tag ) {
 290                 case LDAP_REQ_SEARCH:
 291                         if ( op->ors_scope != LDAP_SCOPE_BASE ) {
 292                                 goto return_referral;
 293                         }
 294                         /* process */
 295                         return lastmod_search( op, rs );
 296
 297                 case LDAP_REQ_COMPARE:
 298                         return lastmod_compare( op, rs );
 299
 300                 case LDAP_REQ_EXTENDED:
 301                         /* if write, reject; otherwise process */
 302                         if ( exop_is_write( op )) {
 303                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 304                                 rs->sr_text = "not allowed within namingContext";
 305                                 goto return_error;
 306                         }
 307                         return lastmod_exop( op, rs );
 308
 309                 case LDAP_REQ_MODIFY:
 310                         /* allow only changes to overlay status */
 311                         for ( ml = op->orm_modlist; ml; ml = ml->sml_next ) {
 312                                 if ( ad_cmp( ml->sml_desc, slap_schema.si_ad_modifiersName ) != 0
 313                                                 && ad_cmp( ml->sml_desc, slap_schema.si_ad_modifyTimestamp ) != 0
 314                                                 && ad_cmp( ml->sml_desc, slap_schema.si_ad_entryCSN ) != 0
 315                                                 && ad_cmp( ml->sml_desc, lastmod_schema.lms_ad_lastmodEnabled ) != 0 )
 316                                 {
 317                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 318                                         rs->sr_text = "not allowed within namingContext";
 319                                         goto return_error;
 320                                 }
 321                         }
 322                         return lastmod_modify( op, rs );
 323
 324                 default:
 325                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 326                         rs->sr_text = "not allowed within namingContext";
 327                         goto return_error;
 328                 }
 329         }
 330
 331         if ( dnIsSuffix( &op->o_req_ndn, &lmi->lmi_e->e_nname ) ) {
 332                 goto return_referral;
 333         }
 334
 335         return SLAP_CB_CONTINUE;
 336
 337 return_referral:;
 338         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 339         rs->sr_ref = referral_rewrite( default_referral,
 340                         NULL, &op->o_req_dn, op->ors_scope );
 341
 342         if ( !rs->sr_ref ) {
 343                 rs->sr_ref = default_referral;
 344         }
 345         rs->sr_err = LDAP_REFERRAL;
 346         send_ldap_result( op, rs );
 347
 348         if ( rs->sr_ref != default_referral ) {
 349                 ber_bvarray_free( rs->sr_ref );
 350         }
 351         rs->sr_ref = NULL;
 352
 353         return -1;
 354
 355 return_error:;
 356         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 357         send_ldap_result( op, rs );
 358         rs->sr_text = NULL;
 359
 360         return -1;
 361 }
 362
 363 static int
 364 best_guess( Operation *op,
 365                 struct berval *bv_entryCSN, struct berval *bv_nentryCSN,
 366                 struct berval *bv_modifyTimestamp, struct berval *bv_nmodifyTimestamp,
 367                 struct berval *bv_modifiersName, struct berval *bv_nmodifiersName )
 368 {
 369         if ( bv_entryCSN ) {
 370                 char            csnbuf[ LDAP_LUTIL_CSNSTR_BUFSIZE ];
 371                 struct berval   entryCSN;
 372
 373                 slap_get_csn( NULL, csnbuf, sizeof(csnbuf), &entryCSN, 0 );
 374
 375                 ber_dupbv( bv_entryCSN, &entryCSN );
 376                 ber_dupbv( bv_nentryCSN, &entryCSN );
 377         }
 378
 379         if ( bv_modifyTimestamp ) {
 380                 char            tmbuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 381                 struct berval timestamp;
 382                 time_t          currtime;
 383
 384                 /* best guess */
 385 #if 0
 386                 currtime = slap_get_time();
 387 #endif
 388                 /* maybe we better use the time the operation was initiated */
 389                 currtime = op->o_time;
 390
 391                 timestamp.bv_val = tmbuf;
 392                 timestamp.bv_len = sizeof(tmbuf);
 393                 slap_timestamp( &currtime, &timestamp );
 394
 395                 ber_dupbv( bv_modifyTimestamp, &timestamp );
 396                 ber_dupbv( bv_nmodifyTimestamp, bv_modifyTimestamp );
 397         }
 398
 399         if ( bv_modifiersName ) {
 400                 /* best guess */
 401                 ber_dupbv( bv_modifiersName, &op->o_dn );
 402                 ber_dupbv( bv_nmodifiersName, &op->o_ndn );
 403         }
 404
 405         return 0;
 406 }
 407
 408 static int
 409 lastmod_update( Operation *op, SlapReply *rs )
 410 {
 411         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 412         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 413         Attribute               *a;
 414         Modifications           *ml = NULL;
 415         struct berval           bv_entryCSN = BER_BVNULL,
 416                                 bv_nentryCSN = BER_BVNULL,
 417                                 bv_modifyTimestamp = BER_BVNULL,
 418                                 bv_nmodifyTimestamp = BER_BVNULL,
 419                                 bv_modifiersName = BER_BVNULL,
 420                                 bv_nmodifiersName = BER_BVNULL,
 421                                 bv_name = BER_BVNULL,
 422                                 bv_nname = BER_BVNULL;
 423         enum lastmodType_e      lmt = LASTMOD_UNKNOWN;
 424         Entry                   *e = NULL;
 425         int                     rc = -1;
 426
 427         /* FIXME: timestamp? modifier? */
 428         switch ( op->o_tag ) {
 429         case LDAP_REQ_ADD:
 430                 lmt = LASTMOD_ADD;
 431                 e = op->ora_e;
 432                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryCSN );
 433                 if ( a != NULL ) {
 434                         ber_dupbv( &bv_entryCSN, &a->a_vals[0] );
 435                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 436                                 ber_dupbv( &bv_nentryCSN, &a->a_nvals[0] );
 437                         } else {
 438                                 ber_dupbv( &bv_nentryCSN, &a->a_vals[0] );
 439                         }
 440                 }
 441                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifyTimestamp );
 442                 if ( a != NULL ) {
 443                         ber_dupbv( &bv_modifyTimestamp, &a->a_vals[0] );
 444                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 445                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_nvals[0] );
 446                         } else {
 447                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_vals[0] );
 448                         }
 449                 }
 450                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifiersName );
 451                 if ( a != NULL ) {
 452                         ber_dupbv( &bv_modifiersName, &a->a_vals[0] );
 453                         ber_dupbv( &bv_nmodifiersName, &a->a_nvals[0] );
 454                 }
 455                 ber_dupbv( &bv_name, &e->e_name );
 456                 ber_dupbv( &bv_nname, &e->e_nname );
 457                 break;
 458
 459         case LDAP_REQ_DELETE:
 460                 lmt = LASTMOD_DELETE;
 461
 462                 best_guess( op, &bv_entryCSN, &bv_nentryCSN,
 463                                 &bv_modifyTimestamp, &bv_nmodifyTimestamp,
 464                                 &bv_modifiersName, &bv_nmodifiersName );
 465
 466                 ber_dupbv( &bv_name, &op->o_req_dn );
 467                 ber_dupbv( &bv_nname, &op->o_req_ndn );
 468                 break;
 469
 470         case LDAP_REQ_EXTENDED:
 471                 lmt = LASTMOD_EXOP;
 472
 473                 /* actually, password change is wrapped around a backend
 474                  * call to modify, so it never shows up as an exop... */
 475                 best_guess( op, &bv_entryCSN, &bv_nentryCSN,
 476                                 &bv_modifyTimestamp, &bv_nmodifyTimestamp,
 477                                 &bv_modifiersName, &bv_nmodifiersName );
 478
 479                 ber_dupbv( &bv_name, &op->o_req_dn );
 480                 ber_dupbv( &bv_nname, &op->o_req_ndn );
 481                 break;
 482
 483         case LDAP_REQ_MODIFY:
 484                 lmt = LASTMOD_MODIFY;
 485                 rc = 3;
 486
 487                 for ( ml = op->orm_modlist; ml; ml = ml->sml_next ) {
 488                         if ( ad_cmp( ml->sml_desc , slap_schema.si_ad_modifiersName ) == 0 ) {
 489                                 ber_dupbv( &bv_modifiersName, &ml->sml_values[0] );
 490                                 ber_dupbv( &bv_nmodifiersName, &ml->sml_nvalues[0] );
 491
 492                                 rc--;
 493                                 if ( !rc ) {
 494                                         break;
 495                                 }
 496
 497                         } else if ( ad_cmp( ml->sml_desc, slap_schema.si_ad_entryCSN ) == 0 ) {
 498                                 ber_dupbv( &bv_entryCSN, &ml->sml_values[0] );
 499                                 if ( ml->sml_nvalues && !BER_BVISNULL( &ml->sml_nvalues[0] ) ) {
 500                                         ber_dupbv( &bv_nentryCSN, &ml->sml_nvalues[0] );
 501                                 } else {
 502                                         ber_dupbv( &bv_nentryCSN, &ml->sml_values[0] );
 503                                 }
 504
 505                                 rc --;
 506                                 if ( !rc ) {
 507                                         break;
 508                                 }
 509
 510                         } else if ( ad_cmp( ml->sml_desc, slap_schema.si_ad_modifyTimestamp ) == 0 ) {
 511                                 ber_dupbv( &bv_modifyTimestamp, &ml->sml_values[0] );
 512                                 if ( ml->sml_nvalues && !BER_BVISNULL( &ml->sml_nvalues[0] ) ) {
 513                                         ber_dupbv( &bv_nmodifyTimestamp, &ml->sml_nvalues[0] );
 514                                 } else {
 515                                         ber_dupbv( &bv_nmodifyTimestamp, &ml->sml_values[0] );
 516                                 }
 517
 518                                 rc --;
 519                                 if ( !rc ) {
 520                                         break;
 521                                 }
 522                         }
 523                 }
 524
 525                 /* if rooted at global overlay, opattrs are not yet in place */
 526                 if ( BER_BVISNULL( &bv_modifiersName ) ) {
 527                         best_guess( op, NULL, NULL, NULL, NULL, &bv_modifiersName, &bv_nmodifiersName );
 528                 }
 529
 530                 if ( BER_BVISNULL( &bv_entryCSN ) ) {
 531                         best_guess( op, &bv_entryCSN, &bv_nentryCSN, NULL, NULL, NULL, NULL );
 532                 }
 533
 534                 if ( BER_BVISNULL( &bv_modifyTimestamp ) ) {
 535                         best_guess( op, NULL, NULL, &bv_modifyTimestamp, &bv_nmodifyTimestamp, NULL, NULL );
 536                 }
 537
 538                 ber_dupbv( &bv_name, &op->o_req_dn );
 539                 ber_dupbv( &bv_nname, &op->o_req_ndn );
 540                 break;
 541
 542         case LDAP_REQ_MODRDN:
 543                 lmt = LASTMOD_MODRDN;
 544                 e = NULL;
 545
 546                 if ( op->orr_newSup && !BER_BVISNULL( op->orr_newSup ) ) {
 547                         build_new_dn( &bv_name, op->orr_newSup, &op->orr_newrdn, NULL );
 548                         build_new_dn( &bv_nname, op->orr_nnewSup, &op->orr_nnewrdn, NULL );
 549
 550                 } else {
 551                         struct berval   pdn;
 552
 553                         dnParent( &op->o_req_dn, &pdn );
 554                         build_new_dn( &bv_name, &pdn, &op->orr_newrdn, NULL );
 555
 556                         dnParent( &op->o_req_ndn, &pdn );
 557                         build_new_dn( &bv_nname, &pdn, &op->orr_nnewrdn, NULL );
 558                 }
 559
 560                 if ( on->on_info->oi_orig->bi_entry_get_rw ) {
 561                         BackendInfo     *bi = op->o_bd->bd_info;
 562                         int             rc;
 563
 564                         op->o_bd->bd_info = (BackendInfo *)on->on_info->oi_orig;
 565                         rc = (*op->o_bd->bd_info->bi_entry_get_rw)( op, &bv_name, NULL, NULL, 0, &e );
 566                         if ( rc == LDAP_SUCCESS ) {
 567                                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifiersName );
 568                                 if ( a != NULL ) {
 569                                         ber_dupbv( &bv_modifiersName, &a->a_vals[0] );
 570                                         ber_dupbv( &bv_nmodifiersName, &a->a_nvals[0] );
 571                                 }
 572                                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryCSN );
 573                                 if ( a != NULL ) {
 574                                         ber_dupbv( &bv_entryCSN, &a->a_vals[0] );
 575                                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 576                                                 ber_dupbv( &bv_nentryCSN, &a->a_nvals[0] );
 577                                         } else {
 578                                                 ber_dupbv( &bv_nentryCSN, &a->a_vals[0] );
 579                                         }
 580                                 }
 581                                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifyTimestamp );
 582                                 if ( a != NULL ) {
 583                                         ber_dupbv( &bv_modifyTimestamp, &a->a_vals[0] );
 584                                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 585                                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_nvals[0] );
 586                                         } else {
 587                                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_vals[0] );
 588                                         }
 589                                 }
 590
 591                                 assert( dn_match( &bv_name, &e->e_name ) );
 592                                 assert( dn_match( &bv_nname, &e->e_nname ) );
 593
 594                                 (*op->o_bd->bd_info->bi_entry_release_rw)( op, e, 0 );
 595                         }
 596
 597                         op->o_bd->bd_info = bi;
 598
 599                 }
 600
 601                 /* if !bi_entry_get_rw || bi_entry_get_rw failed for any reason... */
 602                 if ( e == NULL ) {
 603                         best_guess( op, &bv_entryCSN, &bv_nentryCSN,
 604                                         &bv_modifyTimestamp, &bv_nmodifyTimestamp,
 605                                         &bv_modifiersName, &bv_nmodifiersName );
 606                 }
 607
 608                 break;
 609
 610         default:
 611                 return -1;
 612         }
 613
 614         ldap_pvt_thread_mutex_lock( &lmi->lmi_entry_mutex );
 615
 616 #if 0
 617         fprintf( stderr, "### lastmodDN: %s %s\n", bv_name.bv_val, bv_nname.bv_val );
 618 #endif
 619
 620         a = attr_find( lmi->lmi_e->e_attrs, lastmod_schema.lms_ad_lastmodDN );
 621         if ( a == NULL ) {
 622                 goto error_return;
 623         }
 624         ch_free( a->a_vals[0].bv_val );
 625         a->a_vals[0] = bv_name;
 626         ch_free( a->a_nvals[0].bv_val );
 627         a->a_nvals[0] = bv_nname;
 628
 629 #if 0
 630         fprintf( stderr, "### lastmodType: %s %s\n", lastmodType[ lmt ].bv_val, lastmodType[ lmt ].bv_val );
 631 #endif
 632
 633         a = attr_find( lmi->lmi_e->e_attrs, lastmod_schema.lms_ad_lastmodType );
 634         if ( a == NULL ) {
 635                 goto error_return;
 636         }
 637         ch_free( a->a_vals[0].bv_val );
 638         ber_dupbv( &a->a_vals[0], &lastmodType[ lmt ] );
 639         ch_free( a->a_nvals[0].bv_val );
 640         ber_dupbv( &a->a_nvals[0], &lastmodType[ lmt ] );
 641
 642 #if 0
 643         fprintf( stderr, "### modifiersName: %s %s\n", bv_modifiersName.bv_val, bv_nmodifiersName.bv_val );
 644 #endif
 645
 646         a = attr_find( lmi->lmi_e->e_attrs, slap_schema.si_ad_modifiersName );
 647         if ( a == NULL ) {
 648                 goto error_return;
 649         }
 650         ch_free( a->a_vals[0].bv_val );
 651         a->a_vals[0] = bv_modifiersName;
 652         ch_free( a->a_nvals[0].bv_val );
 653         a->a_nvals[0] = bv_nmodifiersName;
 654
 655 #if 0
 656         fprintf( stderr, "### modifyTimestamp: %s %s\n", bv_nmodifyTimestamp.bv_val, bv_modifyTimestamp.bv_val );
 657 #endif
 658
 659         a = attr_find( lmi->lmi_e->e_attrs, slap_schema.si_ad_modifyTimestamp );
 660         if ( a == NULL ) {
 661                 goto error_return;
 662         }
 663         ch_free( a->a_vals[0].bv_val );
 664         a->a_vals[0] = bv_modifyTimestamp;
 665         ch_free( a->a_nvals[0].bv_val );
 666         a->a_nvals[0] = bv_nmodifyTimestamp;
 667
 668 #if 0
 669         fprintf( stderr, "### entryCSN: %s %s\n", bv_nentryCSN.bv_val, bv_entryCSN.bv_val );
 670 #endif
 671
 672         a = attr_find( lmi->lmi_e->e_attrs, slap_schema.si_ad_entryCSN );
 673         if ( a == NULL ) {
 674                 goto error_return;
 675         }
 676         ch_free( a->a_vals[0].bv_val );
 677         a->a_vals[0] = bv_entryCSN;
 678         ch_free( a->a_nvals[0].bv_val );
 679         a->a_nvals[0] = bv_nentryCSN;
 680
 681         rc = 0;
 682
 683 error_return:;
 684         ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 685
 686         return rc;
 687 }
 688
 689 static int
 690 lastmod_response( Operation *op, SlapReply *rs )
 691 {
 692         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 693         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 694
 695         /* don't record failed operations */
 696         switch ( rs->sr_err ) {
 697         case LDAP_SUCCESS:
 698                 /* FIXME: other cases? */
 699                 break;
 700
 701         default:
 702                 return SLAP_CB_CONTINUE;
 703         }
 704
 705         /* record only write operations */
 706         switch ( op->o_tag ) {
 707         case LDAP_REQ_ADD:
 708         case LDAP_REQ_MODIFY:
 709         case LDAP_REQ_MODRDN:
 710         case LDAP_REQ_DELETE:
 711                 break;
 712
 713         case LDAP_REQ_EXTENDED:
 714                 /* if write, process */
 715                 if ( exop_is_write( op ))
 716                         break;
 717
 718                 /* fall thru */
 719         default:
 720                 return SLAP_CB_CONTINUE;
 721         }
 722
 723         /* skip if disabled */
 724         ldap_pvt_thread_mutex_lock( &lmi->lmi_entry_mutex );
 725         if ( !lmi->lmi_enabled ) {
 726                 ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 727                 return SLAP_CB_CONTINUE;
 728         }
 729         ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 730
 731         (void)lastmod_update( op, rs );
 732
 733         return SLAP_CB_CONTINUE;
 734 }
 735
 736 static int
 737 lastmod_db_init(
 738         BackendDB *be
 739 )
 740 {
 741         slap_overinst           *on = (slap_overinst *)be->bd_info;
 742         lastmod_info_t          *lmi;
 743
 744         if ( lastmod_schema.lms_oc_lastmod == NULL ) {
 745                 int             i;
 746                 const char      *text;
 747
 748                 /* schema integration */
 749                 for ( i = 0; mat[i].name; i++ ) {
 750                         LDAPAttributeType       *at;
 751                         int                     code;
 752                         const char              *err;
 753                         AttributeDescription    **ad;
 754
 755                         at = ldap_str2attributetype( mat[i].schema, &code,
 756                                 &err, LDAP_SCHEMA_ALLOW_ALL );
 757                         if ( !at ) {
 758                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 759                                         "in AttributeType '%s' %s before %s\n",
 760                                         mat[i].name, ldap_scherr2str(code), err );
 761                                 return -1;
 762                         }
 763
 764                         if ( at->at_oid == NULL ) {
 765                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 766                                         "null OID for attributeType '%s'\n",
 767                                         mat[i].name, 0, 0 );
 768                                 return -1;
 769                         }
 770
 771                         code = at_add(at, 0, NULL, &err);
 772                         if ( code ) {
 773                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 774                                         "%s in attributeType '%s'\n",
 775                                         scherr2str(code), mat[i].name, 0 );
 776                                 return -1;
 777                         }
 778                         ldap_memfree(at);
 779
 780                         ad = ((AttributeDescription **)&(((char *)&lastmod_schema)[mat[i].offset]));
 781                         ad[0] = NULL;
 782                         if ( slap_str2ad( mat[i].name, ad, &text ) ) {
 783                                 Debug( LDAP_DEBUG_ANY,
 784                                         "lastmod_init: %s\n", text, 0, 0 );
 785                                 return -1;
 786                         }
 787
 788                         (*ad)->ad_type->sat_flags |= mat[i].flags;
 789                 }
 790
 791                 for ( i = 0; moc[i].name; i++ ) {
 792                         LDAPObjectClass         *oc;
 793                         int                     code;
 794                         const char              *err;
 795                         ObjectClass             *Oc;
 796
 797                         oc = ldap_str2objectclass(moc[i].schema, &code, &err,
 798                                         LDAP_SCHEMA_ALLOW_ALL );
 799                         if ( !oc ) {
 800                                 Debug( LDAP_DEBUG_ANY,
 801                                         "unable to parse lastmod objectClass '%s': "
 802                                         "%s before %s\n" , moc[i].name,
 803                                         ldap_scherr2str(code), err );
 804                                 return -1;
 805                         }
 806
 807                         if ( oc->oc_oid == NULL ) {
 808                                 Debug( LDAP_DEBUG_ANY,
 809                                         "objectClass '%s' has no OID\n" ,
 810                                         moc[i].name, 0, 0 );
 811                                 return -1;
 812                         }
 813
 814                         code = oc_add(oc, 0, NULL, &err);
 815                         if ( code ) {
 816                                 Debug( LDAP_DEBUG_ANY,
 817                                         "objectClass '%s': %s \"%s\"\n" ,
 818                                         moc[i].name, scherr2str(code), err );
 819                                 return -1;
 820                         }
 821
 822                         ldap_memfree(oc);
 823
 824                         Oc = oc_find( moc[i].name );
 825                         if ( Oc == NULL ) {
 826                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 827                                                 "unable to find objectClass %s "
 828                                                 "(just added)\n", moc[i].name, 0, 0 );
 829                                 return -1;
 830                         }
 831
 832                         Oc->soc_flags |= moc[i].flags;
 833
 834                         ((ObjectClass **)&(((char *)&lastmod_schema)[moc[i].offset]))[0] = Oc;
 835                 }
 836         }
 837
 838         lmi = (lastmod_info_t *)ch_malloc( sizeof( lastmod_info_t ) );
 839
 840         memset( lmi, 0, sizeof( lastmod_info_t ) );
 841         lmi->lmi_enabled = 1;
 842
 843         on->on_bi.bi_private = lmi;
 844
 845         return 0;
 846 }
 847
 848 static int
 849 lastmod_db_config(
 850         BackendDB       *be,
 851         const char      *fname,
 852         int             lineno,
 853         int             argc,
 854         char    **argv
 855 )
 856 {
 857         slap_overinst           *on = (slap_overinst *)be->bd_info;
 858         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 859
 860         if ( strcasecmp( argv[ 0 ], "lastmod-rdnvalue" ) == 0 ) {
 861                 if ( lmi->lmi_rdnvalue.bv_val ) {
 862                         /* already defined! */
 863                         ch_free( lmi->lmi_rdnvalue.bv_val );
 864                 }
 865
 866                 ber_str2bv( argv[ 1 ], 0, 1, &lmi->lmi_rdnvalue );
 867
 868         } else if ( strcasecmp( argv[ 0 ], "lastmod-enabled" ) == 0 ) {
 869                 if ( strcasecmp( argv[ 1 ], "yes" ) == 0 ) {
 870                         lmi->lmi_enabled = 1;
 871
 872                 } else if ( strcasecmp( argv[ 1 ], "no" ) == 0 ) {
 873                         lmi->lmi_enabled = 0;
 874
 875                 } else {
 876                         return -1;
 877                 }
 878
 879         } else {
 880                 return SLAP_CONF_UNKNOWN;
 881         }
 882
 883         return 0;
 884 }
 885
 886 static int
 887 lastmod_db_open(
 888         BackendDB *be
 889 )
 890 {
 891         slap_overinst   *on = (slap_overinst *) be->bd_info;
 892         lastmod_info_t  *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 893         char            buf[ 8192 ];
 894         static char             tmbuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 895
 896         char                    csnbuf[ LDAP_LUTIL_CSNSTR_BUFSIZE ];
 897         struct berval           entryCSN;
 898         struct berval timestamp;
 899
 900         if ( !SLAP_LASTMOD( be ) ) {
 901                 fprintf( stderr, "set \"lastmod on\" to make this overlay effective\n" );
 902                 return -1;
 903         }
 904
 905         /*
 906          * Start
 907          */
 908         timestamp.bv_val = tmbuf;
 909         timestamp.bv_len = sizeof(tmbuf);
 910         slap_timestamp( &starttime, &timestamp );
 911
 912         slap_get_csn( NULL, csnbuf, sizeof(csnbuf), &entryCSN, 0 );
 913
 914         if ( BER_BVISNULL( &lmi->lmi_rdnvalue ) ) {
 915                 ber_str2bv( "Lastmod", 0, 1, &lmi->lmi_rdnvalue );
 916         }
 917
 918         snprintf( buf, sizeof( buf ),
 919                         "dn: cn=%s%s%s\n"
 920                         "objectClass: %s\n"
 921                         "structuralObjectClass: %s\n"
 922                         "cn: %s\n"
 923                         "description: This object contains the last modification to this database\n"
 924                         "%s: cn=%s%s%s\n"
 925                         "%s: %s\n"
 926                         "%s: %s\n"
 927                         "createTimestamp: %s\n"
 928                         "creatorsName: %s\n"
 929                         "entryCSN: %s\n"
 930                         "modifyTimestamp: %s\n"
 931                         "modifiersName: %s\n"
 932                         "hasSubordinates: FALSE\n",
 933                         lmi->lmi_rdnvalue.bv_val, BER_BVISEMPTY( &be->be_suffix[ 0 ] ) ? "" : ",", be->be_suffix[ 0 ].bv_val,
 934                         lastmod_schema.lms_oc_lastmod->soc_cname.bv_val,
 935                         lastmod_schema.lms_oc_lastmod->soc_cname.bv_val,
 936                         lmi->lmi_rdnvalue.bv_val,
 937                         lastmod_schema.lms_ad_lastmodDN->ad_cname.bv_val,
 938                                 lmi->lmi_rdnvalue.bv_val, BER_BVISEMPTY( &be->be_suffix[ 0 ] ) ? "" : ",", be->be_suffix[ 0 ].bv_val,
 939                         lastmod_schema.lms_ad_lastmodType->ad_cname.bv_val, lastmodType[ LASTMOD_ADD ].bv_val,
 940                         lastmod_schema.lms_ad_lastmodEnabled->ad_cname.bv_val, lmi->lmi_enabled ? "TRUE" : "FALSE",
 941                         tmbuf,
 942                         BER_BVISNULL( &be->be_rootdn ) ? SLAPD_ANONYMOUS : be->be_rootdn.bv_val,
 943                         entryCSN.bv_val,
 944                         tmbuf,
 945                         BER_BVISNULL( &be->be_rootdn ) ? SLAPD_ANONYMOUS : be->be_rootdn.bv_val );
 946
 947 #if 0
 948         fprintf( stderr, "# entry:\n%s\n", buf );
 949 #endif
 950
 951         lmi->lmi_e = str2entry( buf );
 952         if ( lmi->lmi_e == NULL ) {
 953                 return -1;
 954         }
 955
 956         ldap_pvt_thread_mutex_init( &lmi->lmi_entry_mutex );
 957
 958         return 0;
 959 }
 960
 961 static int
 962 lastmod_db_destroy(
 963         BackendDB *be
 964 )
 965 {
 966         slap_overinst   *on = (slap_overinst *)be->bd_info;
 967         lastmod_info_t  *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 968
 969         if ( lmi ) {
 970                 if ( !BER_BVISNULL( &lmi->lmi_rdnvalue ) ) {
 971                         ch_free( lmi->lmi_rdnvalue.bv_val );
 972                 }
 973
 974                 if ( lmi->lmi_e ) {
 975                         entry_free( lmi->lmi_e );
 976
 977                         ldap_pvt_thread_mutex_destroy( &lmi->lmi_entry_mutex );
 978                 }
 979
 980                 ch_free( lmi );
 981         }
 982
 983         return 0;
 984 }
 985
 986 /* This overlay is set up for dynamic loading via moduleload. For static
 987  * configuration, you'll need to arrange for the slap_overinst to be
 988  * initialized and registered by some other function inside slapd.
 989  */
 990
 991 static slap_overinst            lastmod;
 992
 993 int
 994 lastmod_init()
 995 {
 996         lastmod.on_bi.bi_type = "lastmod";
 997         lastmod.on_bi.bi_db_init = lastmod_db_init;
 998         lastmod.on_bi.bi_db_config = lastmod_db_config;
 999         lastmod.on_bi.bi_db_destroy = lastmod_db_destroy;
1000         lastmod.on_bi.bi_db_open = lastmod_db_open;
1001
1002         lastmod.on_bi.bi_op_add = lastmod_op_func;
1003         lastmod.on_bi.bi_op_compare = lastmod_op_func;
1004         lastmod.on_bi.bi_op_delete = lastmod_op_func;
1005         lastmod.on_bi.bi_op_modify = lastmod_op_func;
1006         lastmod.on_bi.bi_op_modrdn = lastmod_op_func;
1007         lastmod.on_bi.bi_op_search = lastmod_op_func;
1008         lastmod.on_bi.bi_extended = lastmod_op_func;
1009
1010         lastmod.on_response = lastmod_response;
1011
1012         return overlay_register( &lastmod );
1013 }
1014
1015 #if SLAPD_OVER_LASTMOD == SLAPD_MOD_DYNAMIC
1016 int
1017 init_module( int argc, char *argv[] )
1018 {
1019         return lastmod_init();
1020 }
1021 #endif /* SLAPD_OVER_LASTMOD == SLAPD_MOD_DYNAMIC */
1022
1023 #endif /* defined(SLAPD_OVER_LASTMOD) */