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                 entryCSN.bv_val = csnbuf;
 374                 entryCSN.bv_len = sizeof( csnbuf );
 375                 slap_get_csn( NULL, &entryCSN, 0 );
 376
 377                 ber_dupbv( bv_entryCSN, &entryCSN );
 378                 ber_dupbv( bv_nentryCSN, &entryCSN );
 379         }
 380
 381         if ( bv_modifyTimestamp ) {
 382                 char            tmbuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 383                 struct berval timestamp;
 384                 time_t          currtime;
 385
 386                 /* best guess */
 387 #if 0
 388                 currtime = slap_get_time();
 389 #endif
 390                 /* maybe we better use the time the operation was initiated */
 391                 currtime = op->o_time;
 392
 393                 timestamp.bv_val = tmbuf;
 394                 timestamp.bv_len = sizeof(tmbuf);
 395                 slap_timestamp( &currtime, &timestamp );
 396
 397                 ber_dupbv( bv_modifyTimestamp, &timestamp );
 398                 ber_dupbv( bv_nmodifyTimestamp, bv_modifyTimestamp );
 399         }
 400
 401         if ( bv_modifiersName ) {
 402                 /* best guess */
 403                 ber_dupbv( bv_modifiersName, &op->o_dn );
 404                 ber_dupbv( bv_nmodifiersName, &op->o_ndn );
 405         }
 406
 407         return 0;
 408 }
 409
 410 static int
 411 lastmod_update( Operation *op, SlapReply *rs )
 412 {
 413         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 414         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 415         Attribute               *a;
 416         Modifications           *ml = NULL;
 417         struct berval           bv_entryCSN = BER_BVNULL,
 418                                 bv_nentryCSN = BER_BVNULL,
 419                                 bv_modifyTimestamp = BER_BVNULL,
 420                                 bv_nmodifyTimestamp = BER_BVNULL,
 421                                 bv_modifiersName = BER_BVNULL,
 422                                 bv_nmodifiersName = BER_BVNULL,
 423                                 bv_name = BER_BVNULL,
 424                                 bv_nname = BER_BVNULL;
 425         enum lastmodType_e      lmt = LASTMOD_UNKNOWN;
 426         Entry                   *e = NULL;
 427         int                     rc = -1;
 428
 429         /* FIXME: timestamp? modifier? */
 430         switch ( op->o_tag ) {
 431         case LDAP_REQ_ADD:
 432                 lmt = LASTMOD_ADD;
 433                 e = op->ora_e;
 434                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryCSN );
 435                 if ( a != NULL ) {
 436                         ber_dupbv( &bv_entryCSN, &a->a_vals[0] );
 437                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 438                                 ber_dupbv( &bv_nentryCSN, &a->a_nvals[0] );
 439                         } else {
 440                                 ber_dupbv( &bv_nentryCSN, &a->a_vals[0] );
 441                         }
 442                 }
 443                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifyTimestamp );
 444                 if ( a != NULL ) {
 445                         ber_dupbv( &bv_modifyTimestamp, &a->a_vals[0] );
 446                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 447                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_nvals[0] );
 448                         } else {
 449                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_vals[0] );
 450                         }
 451                 }
 452                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifiersName );
 453                 if ( a != NULL ) {
 454                         ber_dupbv( &bv_modifiersName, &a->a_vals[0] );
 455                         ber_dupbv( &bv_nmodifiersName, &a->a_nvals[0] );
 456                 }
 457                 ber_dupbv( &bv_name, &e->e_name );
 458                 ber_dupbv( &bv_nname, &e->e_nname );
 459                 break;
 460
 461         case LDAP_REQ_DELETE:
 462                 lmt = LASTMOD_DELETE;
 463
 464                 best_guess( op, &bv_entryCSN, &bv_nentryCSN,
 465                                 &bv_modifyTimestamp, &bv_nmodifyTimestamp,
 466                                 &bv_modifiersName, &bv_nmodifiersName );
 467
 468                 ber_dupbv( &bv_name, &op->o_req_dn );
 469                 ber_dupbv( &bv_nname, &op->o_req_ndn );
 470                 break;
 471
 472         case LDAP_REQ_EXTENDED:
 473                 lmt = LASTMOD_EXOP;
 474
 475                 /* actually, password change is wrapped around a backend
 476                  * call to modify, so it never shows up as an exop... */
 477                 best_guess( op, &bv_entryCSN, &bv_nentryCSN,
 478                                 &bv_modifyTimestamp, &bv_nmodifyTimestamp,
 479                                 &bv_modifiersName, &bv_nmodifiersName );
 480
 481                 ber_dupbv( &bv_name, &op->o_req_dn );
 482                 ber_dupbv( &bv_nname, &op->o_req_ndn );
 483                 break;
 484
 485         case LDAP_REQ_MODIFY:
 486                 lmt = LASTMOD_MODIFY;
 487                 rc = 3;
 488
 489                 for ( ml = op->orm_modlist; ml; ml = ml->sml_next ) {
 490                         if ( ad_cmp( ml->sml_desc , slap_schema.si_ad_modifiersName ) == 0 ) {
 491                                 ber_dupbv( &bv_modifiersName, &ml->sml_values[0] );
 492                                 ber_dupbv( &bv_nmodifiersName, &ml->sml_nvalues[0] );
 493
 494                                 rc--;
 495                                 if ( !rc ) {
 496                                         break;
 497                                 }
 498
 499                         } else if ( ad_cmp( ml->sml_desc, slap_schema.si_ad_entryCSN ) == 0 ) {
 500                                 ber_dupbv( &bv_entryCSN, &ml->sml_values[0] );
 501                                 if ( ml->sml_nvalues && !BER_BVISNULL( &ml->sml_nvalues[0] ) ) {
 502                                         ber_dupbv( &bv_nentryCSN, &ml->sml_nvalues[0] );
 503                                 } else {
 504                                         ber_dupbv( &bv_nentryCSN, &ml->sml_values[0] );
 505                                 }
 506
 507                                 rc --;
 508                                 if ( !rc ) {
 509                                         break;
 510                                 }
 511
 512                         } else if ( ad_cmp( ml->sml_desc, slap_schema.si_ad_modifyTimestamp ) == 0 ) {
 513                                 ber_dupbv( &bv_modifyTimestamp, &ml->sml_values[0] );
 514                                 if ( ml->sml_nvalues && !BER_BVISNULL( &ml->sml_nvalues[0] ) ) {
 515                                         ber_dupbv( &bv_nmodifyTimestamp, &ml->sml_nvalues[0] );
 516                                 } else {
 517                                         ber_dupbv( &bv_nmodifyTimestamp, &ml->sml_values[0] );
 518                                 }
 519
 520                                 rc --;
 521                                 if ( !rc ) {
 522                                         break;
 523                                 }
 524                         }
 525                 }
 526
 527                 /* if rooted at global overlay, opattrs are not yet in place */
 528                 if ( BER_BVISNULL( &bv_modifiersName ) ) {
 529                         best_guess( op, NULL, NULL, NULL, NULL, &bv_modifiersName, &bv_nmodifiersName );
 530                 }
 531
 532                 if ( BER_BVISNULL( &bv_entryCSN ) ) {
 533                         best_guess( op, &bv_entryCSN, &bv_nentryCSN, NULL, NULL, NULL, NULL );
 534                 }
 535
 536                 if ( BER_BVISNULL( &bv_modifyTimestamp ) ) {
 537                         best_guess( op, NULL, NULL, &bv_modifyTimestamp, &bv_nmodifyTimestamp, NULL, NULL );
 538                 }
 539
 540                 ber_dupbv( &bv_name, &op->o_req_dn );
 541                 ber_dupbv( &bv_nname, &op->o_req_ndn );
 542                 break;
 543
 544         case LDAP_REQ_MODRDN:
 545                 lmt = LASTMOD_MODRDN;
 546                 e = NULL;
 547
 548                 if ( op->orr_newSup && !BER_BVISNULL( op->orr_newSup ) ) {
 549                         build_new_dn( &bv_name, op->orr_newSup, &op->orr_newrdn, NULL );
 550                         build_new_dn( &bv_nname, op->orr_nnewSup, &op->orr_nnewrdn, NULL );
 551
 552                 } else {
 553                         struct berval   pdn;
 554
 555                         dnParent( &op->o_req_dn, &pdn );
 556                         build_new_dn( &bv_name, &pdn, &op->orr_newrdn, NULL );
 557
 558                         dnParent( &op->o_req_ndn, &pdn );
 559                         build_new_dn( &bv_nname, &pdn, &op->orr_nnewrdn, NULL );
 560                 }
 561
 562                 if ( on->on_info->oi_orig->bi_entry_get_rw ) {
 563                         BackendInfo     *bi = op->o_bd->bd_info;
 564                         int             rc;
 565
 566                         op->o_bd->bd_info = (BackendInfo *)on->on_info->oi_orig;
 567                         rc = (*op->o_bd->bd_info->bi_entry_get_rw)( op, &bv_name, NULL, NULL, 0, &e );
 568                         if ( rc == LDAP_SUCCESS ) {
 569                                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifiersName );
 570                                 if ( a != NULL ) {
 571                                         ber_dupbv( &bv_modifiersName, &a->a_vals[0] );
 572                                         ber_dupbv( &bv_nmodifiersName, &a->a_nvals[0] );
 573                                 }
 574                                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryCSN );
 575                                 if ( a != NULL ) {
 576                                         ber_dupbv( &bv_entryCSN, &a->a_vals[0] );
 577                                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 578                                                 ber_dupbv( &bv_nentryCSN, &a->a_nvals[0] );
 579                                         } else {
 580                                                 ber_dupbv( &bv_nentryCSN, &a->a_vals[0] );
 581                                         }
 582                                 }
 583                                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifyTimestamp );
 584                                 if ( a != NULL ) {
 585                                         ber_dupbv( &bv_modifyTimestamp, &a->a_vals[0] );
 586                                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 587                                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_nvals[0] );
 588                                         } else {
 589                                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_vals[0] );
 590                                         }
 591                                 }
 592
 593                                 assert( dn_match( &bv_name, &e->e_name ) );
 594                                 assert( dn_match( &bv_nname, &e->e_nname ) );
 595
 596                                 (*op->o_bd->bd_info->bi_entry_release_rw)( op, e, 0 );
 597                         }
 598
 599                         op->o_bd->bd_info = bi;
 600
 601                 }
 602
 603                 /* if !bi_entry_get_rw || bi_entry_get_rw failed for any reason... */
 604                 if ( e == NULL ) {
 605                         best_guess( op, &bv_entryCSN, &bv_nentryCSN,
 606                                         &bv_modifyTimestamp, &bv_nmodifyTimestamp,
 607                                         &bv_modifiersName, &bv_nmodifiersName );
 608                 }
 609
 610                 break;
 611
 612         default:
 613                 return -1;
 614         }
 615
 616         ldap_pvt_thread_mutex_lock( &lmi->lmi_entry_mutex );
 617
 618 #if 0
 619         fprintf( stderr, "### lastmodDN: %s %s\n", bv_name.bv_val, bv_nname.bv_val );
 620 #endif
 621
 622         a = attr_find( lmi->lmi_e->e_attrs, lastmod_schema.lms_ad_lastmodDN );
 623         if ( a == NULL ) {
 624                 goto error_return;
 625         }
 626         ch_free( a->a_vals[0].bv_val );
 627         a->a_vals[0] = bv_name;
 628         ch_free( a->a_nvals[0].bv_val );
 629         a->a_nvals[0] = bv_nname;
 630
 631 #if 0
 632         fprintf( stderr, "### lastmodType: %s %s\n", lastmodType[ lmt ].bv_val, lastmodType[ lmt ].bv_val );
 633 #endif
 634
 635         a = attr_find( lmi->lmi_e->e_attrs, lastmod_schema.lms_ad_lastmodType );
 636         if ( a == NULL ) {
 637                 goto error_return;
 638         }
 639         ch_free( a->a_vals[0].bv_val );
 640         ber_dupbv( &a->a_vals[0], &lastmodType[ lmt ] );
 641         ch_free( a->a_nvals[0].bv_val );
 642         ber_dupbv( &a->a_nvals[0], &lastmodType[ lmt ] );
 643
 644 #if 0
 645         fprintf( stderr, "### modifiersName: %s %s\n", bv_modifiersName.bv_val, bv_nmodifiersName.bv_val );
 646 #endif
 647
 648         a = attr_find( lmi->lmi_e->e_attrs, slap_schema.si_ad_modifiersName );
 649         if ( a == NULL ) {
 650                 goto error_return;
 651         }
 652         ch_free( a->a_vals[0].bv_val );
 653         a->a_vals[0] = bv_modifiersName;
 654         ch_free( a->a_nvals[0].bv_val );
 655         a->a_nvals[0] = bv_nmodifiersName;
 656
 657 #if 0
 658         fprintf( stderr, "### modifyTimestamp: %s %s\n", bv_nmodifyTimestamp.bv_val, bv_modifyTimestamp.bv_val );
 659 #endif
 660
 661         a = attr_find( lmi->lmi_e->e_attrs, slap_schema.si_ad_modifyTimestamp );
 662         if ( a == NULL ) {
 663                 goto error_return;
 664         }
 665         ch_free( a->a_vals[0].bv_val );
 666         a->a_vals[0] = bv_modifyTimestamp;
 667         ch_free( a->a_nvals[0].bv_val );
 668         a->a_nvals[0] = bv_nmodifyTimestamp;
 669
 670 #if 0
 671         fprintf( stderr, "### entryCSN: %s %s\n", bv_nentryCSN.bv_val, bv_entryCSN.bv_val );
 672 #endif
 673
 674         a = attr_find( lmi->lmi_e->e_attrs, slap_schema.si_ad_entryCSN );
 675         if ( a == NULL ) {
 676                 goto error_return;
 677         }
 678         ch_free( a->a_vals[0].bv_val );
 679         a->a_vals[0] = bv_entryCSN;
 680         ch_free( a->a_nvals[0].bv_val );
 681         a->a_nvals[0] = bv_nentryCSN;
 682
 683         rc = 0;
 684
 685 error_return:;
 686         ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 687
 688         return rc;
 689 }
 690
 691 static int
 692 lastmod_response( Operation *op, SlapReply *rs )
 693 {
 694         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 695         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 696
 697         /* don't record failed operations */
 698         switch ( rs->sr_err ) {
 699         case LDAP_SUCCESS:
 700                 /* FIXME: other cases? */
 701                 break;
 702
 703         default:
 704                 return SLAP_CB_CONTINUE;
 705         }
 706
 707         /* record only write operations */
 708         switch ( op->o_tag ) {
 709         case LDAP_REQ_ADD:
 710         case LDAP_REQ_MODIFY:
 711         case LDAP_REQ_MODRDN:
 712         case LDAP_REQ_DELETE:
 713                 break;
 714
 715         case LDAP_REQ_EXTENDED:
 716                 /* if write, process */
 717                 if ( exop_is_write( op ))
 718                         break;
 719
 720                 /* fall thru */
 721         default:
 722                 return SLAP_CB_CONTINUE;
 723         }
 724
 725         /* skip if disabled */
 726         ldap_pvt_thread_mutex_lock( &lmi->lmi_entry_mutex );
 727         if ( !lmi->lmi_enabled ) {
 728                 ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 729                 return SLAP_CB_CONTINUE;
 730         }
 731         ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 732
 733         (void)lastmod_update( op, rs );
 734
 735         return SLAP_CB_CONTINUE;
 736 }
 737
 738 static int
 739 lastmod_db_init(
 740         BackendDB *be
 741 )
 742 {
 743         slap_overinst           *on = (slap_overinst *)be->bd_info;
 744         lastmod_info_t          *lmi;
 745
 746         if ( lastmod_schema.lms_oc_lastmod == NULL ) {
 747                 int             i;
 748                 const char      *text;
 749
 750                 /* schema integration */
 751                 for ( i = 0; mat[i].name; i++ ) {
 752                         LDAPAttributeType       *at;
 753                         int                     code;
 754                         const char              *err;
 755                         AttributeDescription    **ad;
 756
 757                         at = ldap_str2attributetype( mat[i].schema, &code,
 758                                 &err, LDAP_SCHEMA_ALLOW_ALL );
 759                         if ( !at ) {
 760                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 761                                         "in AttributeType '%s' %s before %s\n",
 762                                         mat[i].name, ldap_scherr2str(code), err );
 763                                 return -1;
 764                         }
 765
 766                         if ( at->at_oid == NULL ) {
 767                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 768                                         "null OID for attributeType '%s'\n",
 769                                         mat[i].name, 0, 0 );
 770                                 return -1;
 771                         }
 772
 773                         code = at_add(at, 0, NULL, &err);
 774                         if ( code ) {
 775                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 776                                         "%s in attributeType '%s'\n",
 777                                         scherr2str(code), mat[i].name, 0 );
 778                                 return -1;
 779                         }
 780                         ldap_memfree(at);
 781
 782                         ad = ((AttributeDescription **)&(((char *)&lastmod_schema)[mat[i].offset]));
 783                         ad[0] = NULL;
 784                         if ( slap_str2ad( mat[i].name, ad, &text ) ) {
 785                                 Debug( LDAP_DEBUG_ANY,
 786                                         "lastmod_init: %s\n", text, 0, 0 );
 787                                 return -1;
 788                         }
 789
 790                         (*ad)->ad_type->sat_flags |= mat[i].flags;
 791                 }
 792
 793                 for ( i = 0; moc[i].name; i++ ) {
 794                         LDAPObjectClass         *oc;
 795                         int                     code;
 796                         const char              *err;
 797                         ObjectClass             *Oc;
 798
 799                         oc = ldap_str2objectclass(moc[i].schema, &code, &err,
 800                                         LDAP_SCHEMA_ALLOW_ALL );
 801                         if ( !oc ) {
 802                                 Debug( LDAP_DEBUG_ANY,
 803                                         "unable to parse lastmod objectClass '%s': "
 804                                         "%s before %s\n" , moc[i].name,
 805                                         ldap_scherr2str(code), err );
 806                                 return -1;
 807                         }
 808
 809                         if ( oc->oc_oid == NULL ) {
 810                                 Debug( LDAP_DEBUG_ANY,
 811                                         "objectClass '%s' has no OID\n" ,
 812                                         moc[i].name, 0, 0 );
 813                                 return -1;
 814                         }
 815
 816                         code = oc_add(oc, 0, NULL, &err);
 817                         if ( code ) {
 818                                 Debug( LDAP_DEBUG_ANY,
 819                                         "objectClass '%s': %s \"%s\"\n" ,
 820                                         moc[i].name, scherr2str(code), err );
 821                                 return -1;
 822                         }
 823
 824                         ldap_memfree(oc);
 825
 826                         Oc = oc_find( moc[i].name );
 827                         if ( Oc == NULL ) {
 828                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 829                                                 "unable to find objectClass %s "
 830                                                 "(just added)\n", moc[i].name, 0, 0 );
 831                                 return -1;
 832                         }
 833
 834                         Oc->soc_flags |= moc[i].flags;
 835
 836                         ((ObjectClass **)&(((char *)&lastmod_schema)[moc[i].offset]))[0] = Oc;
 837                 }
 838         }
 839
 840         lmi = (lastmod_info_t *)ch_malloc( sizeof( lastmod_info_t ) );
 841
 842         memset( lmi, 0, sizeof( lastmod_info_t ) );
 843         lmi->lmi_enabled = 1;
 844
 845         on->on_bi.bi_private = lmi;
 846
 847         return 0;
 848 }
 849
 850 static int
 851 lastmod_db_config(
 852         BackendDB       *be,
 853         const char      *fname,
 854         int             lineno,
 855         int             argc,
 856         char    **argv
 857 )
 858 {
 859         slap_overinst           *on = (slap_overinst *)be->bd_info;
 860         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 861
 862         if ( strcasecmp( argv[ 0 ], "lastmod-rdnvalue" ) == 0 ) {
 863                 if ( lmi->lmi_rdnvalue.bv_val ) {
 864                         /* already defined! */
 865                         ch_free( lmi->lmi_rdnvalue.bv_val );
 866                 }
 867
 868                 ber_str2bv( argv[ 1 ], 0, 1, &lmi->lmi_rdnvalue );
 869
 870         } else if ( strcasecmp( argv[ 0 ], "lastmod-enabled" ) == 0 ) {
 871                 if ( strcasecmp( argv[ 1 ], "yes" ) == 0 ) {
 872                         lmi->lmi_enabled = 1;
 873
 874                 } else if ( strcasecmp( argv[ 1 ], "no" ) == 0 ) {
 875                         lmi->lmi_enabled = 0;
 876
 877                 } else {
 878                         return -1;
 879                 }
 880
 881         } else {
 882                 return SLAP_CONF_UNKNOWN;
 883         }
 884
 885         return 0;
 886 }
 887
 888 static int
 889 lastmod_db_open(
 890         BackendDB *be
 891 )
 892 {
 893         slap_overinst   *on = (slap_overinst *) be->bd_info;
 894         lastmod_info_t  *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 895         char            buf[ 8192 ];
 896         static char             tmbuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 897
 898         char                    csnbuf[ LDAP_LUTIL_CSNSTR_BUFSIZE ];
 899         struct berval           entryCSN;
 900         struct berval timestamp;
 901
 902         if ( !SLAP_LASTMOD( be ) ) {
 903                 fprintf( stderr, "set \"lastmod on\" to make this overlay effective\n" );
 904                 return -1;
 905         }
 906
 907         /*
 908          * Start
 909          */
 910         timestamp.bv_val = tmbuf;
 911         timestamp.bv_len = sizeof(tmbuf);
 912         slap_timestamp( &starttime, &timestamp );
 913
 914         entryCSN.bv_val = csnbuf;
 915         entryCSN.bv_len = sizeof( csnbuf );
 916         slap_get_csn( NULL, &entryCSN, 0 );
 917
 918         if ( BER_BVISNULL( &lmi->lmi_rdnvalue ) ) {
 919                 ber_str2bv( "Lastmod", 0, 1, &lmi->lmi_rdnvalue );
 920         }
 921
 922         snprintf( buf, sizeof( buf ),
 923                         "dn: cn=%s%s%s\n"
 924                         "objectClass: %s\n"
 925                         "structuralObjectClass: %s\n"
 926                         "cn: %s\n"
 927                         "description: This object contains the last modification to this database\n"
 928                         "%s: cn=%s%s%s\n"
 929                         "%s: %s\n"
 930                         "%s: %s\n"
 931                         "createTimestamp: %s\n"
 932                         "creatorsName: %s\n"
 933                         "entryCSN: %s\n"
 934                         "modifyTimestamp: %s\n"
 935                         "modifiersName: %s\n"
 936                         "hasSubordinates: FALSE\n",
 937                         lmi->lmi_rdnvalue.bv_val, BER_BVISEMPTY( &be->be_suffix[ 0 ] ) ? "" : ",", be->be_suffix[ 0 ].bv_val,
 938                         lastmod_schema.lms_oc_lastmod->soc_cname.bv_val,
 939                         lastmod_schema.lms_oc_lastmod->soc_cname.bv_val,
 940                         lmi->lmi_rdnvalue.bv_val,
 941                         lastmod_schema.lms_ad_lastmodDN->ad_cname.bv_val,
 942                                 lmi->lmi_rdnvalue.bv_val, BER_BVISEMPTY( &be->be_suffix[ 0 ] ) ? "" : ",", be->be_suffix[ 0 ].bv_val,
 943                         lastmod_schema.lms_ad_lastmodType->ad_cname.bv_val, lastmodType[ LASTMOD_ADD ].bv_val,
 944                         lastmod_schema.lms_ad_lastmodEnabled->ad_cname.bv_val, lmi->lmi_enabled ? "TRUE" : "FALSE",
 945                         tmbuf,
 946                         BER_BVISNULL( &be->be_rootdn ) ? SLAPD_ANONYMOUS : be->be_rootdn.bv_val,
 947                         entryCSN.bv_val,
 948                         tmbuf,
 949                         BER_BVISNULL( &be->be_rootdn ) ? SLAPD_ANONYMOUS : be->be_rootdn.bv_val );
 950
 951 #if 0
 952         fprintf( stderr, "# entry:\n%s\n", buf );
 953 #endif
 954
 955         lmi->lmi_e = str2entry( buf );
 956         if ( lmi->lmi_e == NULL ) {
 957                 return -1;
 958         }
 959
 960         ldap_pvt_thread_mutex_init( &lmi->lmi_entry_mutex );
 961
 962         return 0;
 963 }
 964
 965 static int
 966 lastmod_db_destroy(
 967         BackendDB *be
 968 )
 969 {
 970         slap_overinst   *on = (slap_overinst *)be->bd_info;
 971         lastmod_info_t  *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 972
 973         if ( lmi ) {
 974                 if ( !BER_BVISNULL( &lmi->lmi_rdnvalue ) ) {
 975                         ch_free( lmi->lmi_rdnvalue.bv_val );
 976                 }
 977
 978                 if ( lmi->lmi_e ) {
 979                         entry_free( lmi->lmi_e );
 980
 981                         ldap_pvt_thread_mutex_destroy( &lmi->lmi_entry_mutex );
 982                 }
 983
 984                 ch_free( lmi );
 985         }
 986
 987         return 0;
 988 }
 989
 990 /* This overlay is set up for dynamic loading via moduleload. For static
 991  * configuration, you'll need to arrange for the slap_overinst to be
 992  * initialized and registered by some other function inside slapd.
 993  */
 994
 995 static slap_overinst            lastmod;
 996
 997 int
 998 lastmod_initialize()
 999 {
1000         lastmod.on_bi.bi_type = "lastmod";
1001         lastmod.on_bi.bi_db_init = lastmod_db_init;
1002         lastmod.on_bi.bi_db_config = lastmod_db_config;
1003         lastmod.on_bi.bi_db_destroy = lastmod_db_destroy;
1004         lastmod.on_bi.bi_db_open = lastmod_db_open;
1005
1006         lastmod.on_bi.bi_op_add = lastmod_op_func;
1007         lastmod.on_bi.bi_op_compare = lastmod_op_func;
1008         lastmod.on_bi.bi_op_delete = lastmod_op_func;
1009         lastmod.on_bi.bi_op_modify = lastmod_op_func;
1010         lastmod.on_bi.bi_op_modrdn = lastmod_op_func;
1011         lastmod.on_bi.bi_op_search = lastmod_op_func;
1012         lastmod.on_bi.bi_extended = lastmod_op_func;
1013
1014         lastmod.on_response = lastmod_response;
1015
1016         return overlay_register( &lastmod );
1017 }
1018
1019 #if SLAPD_OVER_LASTMOD == SLAPD_MOD_DYNAMIC
1020 int
1021 init_module( int argc, char *argv[] )
1022 {
1023         return lastmod_initialize();
1024 }
1025 #endif /* SLAPD_OVER_LASTMOD == SLAPD_MOD_DYNAMIC */
1026
1027 #endif /* defined(SLAPD_OVER_LASTMOD) */