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         unsigned                i;
 287         Modifications           *ml;
 288
 289         if ( dn_match( &op->o_req_ndn, &lmi->lmi_e->e_nname ) ) {
 290                 switch ( op->o_tag ) {
 291                 case LDAP_REQ_SEARCH:
 292                         if ( op->ors_scope != LDAP_SCOPE_BASE ) {
 293                                 goto return_referral;
 294                         }
 295                         /* process */
 296                         return lastmod_search( op, rs );
 297
 298                 case LDAP_REQ_COMPARE:
 299                         return lastmod_compare( op, rs );
 300
 301                 case LDAP_REQ_EXTENDED:
 302                         /* if write, reject; otherwise process */
 303                         if ( exop_is_write( op )) {
 304                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 305                                 rs->sr_text = "not allowed within namingContext";
 306                                 goto return_error;
 307                         }
 308                         return lastmod_exop( op, rs );
 309
 310                 case LDAP_REQ_MODIFY:
 311                         /* allow only changes to overlay status */
 312                         for ( ml = op->orm_modlist; ml; ml = ml->sml_next ) {
 313                                 if ( ad_cmp( ml->sml_desc, slap_schema.si_ad_modifiersName ) != 0
 314                                                 && ad_cmp( ml->sml_desc, slap_schema.si_ad_modifyTimestamp ) != 0
 315                                                 && ad_cmp( ml->sml_desc, slap_schema.si_ad_entryCSN ) != 0
 316                                                 && ad_cmp( ml->sml_desc, lastmod_schema.lms_ad_lastmodEnabled ) != 0 )
 317                                 {
 318                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 319                                         rs->sr_text = "not allowed within namingContext";
 320                                         goto return_error;
 321                                 }
 322                         }
 323                         return lastmod_modify( op, rs );
 324
 325                 default:
 326                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 327                         rs->sr_text = "not allowed within namingContext";
 328                         goto return_error;
 329                 }
 330         }
 331
 332         if ( dnIsSuffix( &op->o_req_ndn, &lmi->lmi_e->e_nname ) ) {
 333                 goto return_referral;
 334         }
 335
 336         return SLAP_CB_CONTINUE;
 337
 338 return_referral:;
 339         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 340         rs->sr_ref = referral_rewrite( default_referral,
 341                         NULL, &op->o_req_dn, op->ors_scope );
 342
 343         if ( !rs->sr_ref ) {
 344                 rs->sr_ref = default_referral;
 345         }
 346         rs->sr_err = LDAP_REFERRAL;
 347         send_ldap_result( op, rs );
 348
 349         if ( rs->sr_ref != default_referral ) {
 350                 ber_bvarray_free( rs->sr_ref );
 351         }
 352         rs->sr_ref = NULL;
 353
 354         return -1;
 355
 356 return_error:;
 357         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 358         send_ldap_result( op, rs );
 359         rs->sr_text = NULL;
 360
 361         return -1;
 362 }
 363
 364 static int
 365 best_guess( Operation *op,
 366                 struct berval *bv_entryCSN, struct berval *bv_nentryCSN,
 367                 struct berval *bv_modifyTimestamp, struct berval *bv_nmodifyTimestamp,
 368                 struct berval *bv_modifiersName, struct berval *bv_nmodifiersName )
 369 {
 370         if ( bv_entryCSN ) {
 371                 char            csnbuf[ LDAP_LUTIL_CSNSTR_BUFSIZE ];
 372                 struct berval   entryCSN;
 373
 374                 slap_get_csn( NULL, csnbuf, sizeof(csnbuf), &entryCSN, 0 );
 375
 376                 ber_dupbv( bv_entryCSN, &entryCSN );
 377                 ber_dupbv( bv_nentryCSN, &entryCSN );
 378         }
 379
 380         if ( bv_modifyTimestamp ) {
 381                 struct tm       *tm;
 382 #ifdef HAVE_GMTIME_R
 383                 struct tm       tm_buf;
 384 #endif
 385                 char            tmbuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 386                 time_t          currtime;
 387
 388                 /* best guess */
 389 #if 0
 390                 currtime = slap_get_time();
 391 #endif
 392                 /* maybe we better use the time the operation was initiated */
 393                 currtime = op->o_time;
 394
 395 #ifndef HAVE_GMTIME_R
 396                 ldap_pvt_thread_mutex_lock( &gmtime_mutex );
 397                 tm = gmtime( &currtime );
 398 #else /* HAVE_GMTIME_R */
 399                 tm = gmtime_r( &currtime, &tm_buf );
 400 #endif /* HAVE_GMTIME_R */
 401                 lutil_gentime( tmbuf, sizeof( tmbuf ), tm );
 402 #ifndef HAVE_GMTIME_R
 403                 ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
 404 #endif
 405
 406                 ber_str2bv( tmbuf, 0, 1, bv_modifyTimestamp );
 407                 ber_dupbv( bv_nmodifyTimestamp, bv_modifyTimestamp );
 408         }
 409
 410         if ( bv_modifiersName ) {
 411                 /* best guess */
 412                 ber_dupbv( bv_modifiersName, &op->o_dn );
 413                 ber_dupbv( bv_nmodifiersName, &op->o_ndn );
 414         }
 415
 416         return 0;
 417 }
 418
 419 static int
 420 lastmod_update( Operation *op, SlapReply *rs )
 421 {
 422         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 423         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 424         Attribute               *a;
 425         Modifications           *ml = NULL;
 426         struct berval           bv_entryCSN = BER_BVNULL,
 427                                 bv_nentryCSN = BER_BVNULL,
 428                                 bv_modifyTimestamp = BER_BVNULL,
 429                                 bv_nmodifyTimestamp = BER_BVNULL,
 430                                 bv_modifiersName = BER_BVNULL,
 431                                 bv_nmodifiersName = BER_BVNULL,
 432                                 bv_name = BER_BVNULL,
 433                                 bv_nname = BER_BVNULL;
 434         enum lastmodType_e      lmt = LASTMOD_UNKNOWN;
 435         Entry                   *e = NULL;
 436         int                     rc = -1;
 437
 438         /* FIXME: timestamp? modifier? */
 439         switch ( op->o_tag ) {
 440         case LDAP_REQ_ADD:
 441                 lmt = LASTMOD_ADD;
 442                 e = op->ora_e;
 443                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryCSN );
 444                 if ( a != NULL ) {
 445                         ber_dupbv( &bv_entryCSN, &a->a_vals[0] );
 446                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 447                                 ber_dupbv( &bv_nentryCSN, &a->a_nvals[0] );
 448                         } else {
 449                                 ber_dupbv( &bv_nentryCSN, &a->a_vals[0] );
 450                         }
 451                 }
 452                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifyTimestamp );
 453                 if ( a != NULL ) {
 454                         ber_dupbv( &bv_modifyTimestamp, &a->a_vals[0] );
 455                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 456                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_nvals[0] );
 457                         } else {
 458                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_vals[0] );
 459                         }
 460                 }
 461                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifiersName );
 462                 if ( a != NULL ) {
 463                         ber_dupbv( &bv_modifiersName, &a->a_vals[0] );
 464                         ber_dupbv( &bv_nmodifiersName, &a->a_nvals[0] );
 465                 }
 466                 ber_dupbv( &bv_name, &e->e_name );
 467                 ber_dupbv( &bv_nname, &e->e_nname );
 468                 break;
 469
 470         case LDAP_REQ_DELETE:
 471                 lmt = LASTMOD_DELETE;
 472
 473                 best_guess( op, &bv_entryCSN, &bv_nentryCSN,
 474                                 &bv_modifyTimestamp, &bv_nmodifyTimestamp,
 475                                 &bv_modifiersName, &bv_nmodifiersName );
 476
 477                 ber_dupbv( &bv_name, &op->o_req_dn );
 478                 ber_dupbv( &bv_nname, &op->o_req_ndn );
 479                 break;
 480
 481         case LDAP_REQ_EXTENDED:
 482                 lmt = LASTMOD_EXOP;
 483
 484                 /* actually, password change is wrapped around a backend
 485                  * call to modify, so it never shows up as an exop... */
 486                 best_guess( op, &bv_entryCSN, &bv_nentryCSN,
 487                                 &bv_modifyTimestamp, &bv_nmodifyTimestamp,
 488                                 &bv_modifiersName, &bv_nmodifiersName );
 489
 490                 ber_dupbv( &bv_name, &op->o_req_dn );
 491                 ber_dupbv( &bv_nname, &op->o_req_ndn );
 492                 break;
 493
 494         case LDAP_REQ_MODIFY:
 495                 lmt = LASTMOD_MODIFY;
 496                 rc = 3;
 497
 498                 for ( ml = op->orm_modlist; ml; ml = ml->sml_next ) {
 499                         if ( ad_cmp( ml->sml_desc , slap_schema.si_ad_modifiersName ) == 0 ) {
 500                                 ber_dupbv( &bv_modifiersName, &ml->sml_values[0] );
 501                                 ber_dupbv( &bv_nmodifiersName, &ml->sml_nvalues[0] );
 502
 503                                 rc--;
 504                                 if ( !rc ) {
 505                                         break;
 506                                 }
 507
 508                         } else if ( ad_cmp( ml->sml_desc, slap_schema.si_ad_entryCSN ) == 0 ) {
 509                                 ber_dupbv( &bv_entryCSN, &ml->sml_values[0] );
 510                                 if ( ml->sml_nvalues && !BER_BVISNULL( &ml->sml_nvalues[0] ) ) {
 511                                         ber_dupbv( &bv_nentryCSN, &ml->sml_nvalues[0] );
 512                                 } else {
 513                                         ber_dupbv( &bv_nentryCSN, &ml->sml_values[0] );
 514                                 }
 515
 516                                 rc --;
 517                                 if ( !rc ) {
 518                                         break;
 519                                 }
 520
 521                         } else if ( ad_cmp( ml->sml_desc, slap_schema.si_ad_modifyTimestamp ) == 0 ) {
 522                                 ber_dupbv( &bv_modifyTimestamp, &ml->sml_values[0] );
 523                                 if ( ml->sml_nvalues && !BER_BVISNULL( &ml->sml_nvalues[0] ) ) {
 524                                         ber_dupbv( &bv_nmodifyTimestamp, &ml->sml_nvalues[0] );
 525                                 } else {
 526                                         ber_dupbv( &bv_nmodifyTimestamp, &ml->sml_values[0] );
 527                                 }
 528
 529                                 rc --;
 530                                 if ( !rc ) {
 531                                         break;
 532                                 }
 533                         }
 534                 }
 535
 536                 /* if rooted at global overlay, opattrs are not yet in place */
 537                 if ( BER_BVISNULL( &bv_modifiersName ) ) {
 538                         best_guess( op, NULL, NULL, NULL, NULL, &bv_modifiersName, &bv_nmodifiersName );
 539                 }
 540
 541                 if ( BER_BVISNULL( &bv_entryCSN ) ) {
 542                         best_guess( op, &bv_entryCSN, &bv_nentryCSN, NULL, NULL, NULL, NULL );
 543                 }
 544
 545                 if ( BER_BVISNULL( &bv_modifyTimestamp ) ) {
 546                         best_guess( op, NULL, NULL, &bv_modifyTimestamp, &bv_nmodifyTimestamp, NULL, NULL );
 547                 }
 548
 549                 ber_dupbv( &bv_name, &op->o_req_dn );
 550                 ber_dupbv( &bv_nname, &op->o_req_ndn );
 551                 break;
 552
 553         case LDAP_REQ_MODRDN:
 554                 lmt = LASTMOD_MODRDN;
 555                 e = NULL;
 556
 557                 if ( op->orr_newSup && !BER_BVISNULL( op->orr_newSup ) ) {
 558                         build_new_dn( &bv_name, op->orr_newSup, &op->orr_newrdn, NULL );
 559                         build_new_dn( &bv_nname, op->orr_nnewSup, &op->orr_nnewrdn, NULL );
 560
 561                 } else {
 562                         struct berval   pdn;
 563
 564                         dnParent( &op->o_req_dn, &pdn );
 565                         build_new_dn( &bv_name, &pdn, &op->orr_newrdn, NULL );
 566
 567                         dnParent( &op->o_req_ndn, &pdn );
 568                         build_new_dn( &bv_nname, &pdn, &op->orr_nnewrdn, NULL );
 569                 }
 570
 571                 if ( on->on_info->oi_orig->bi_entry_get_rw ) {
 572                         BackendInfo     *bi = op->o_bd->bd_info;
 573                         int             rc;
 574
 575                         op->o_bd->bd_info = (BackendInfo *)on->on_info->oi_orig;
 576                         rc = (*op->o_bd->bd_info->bi_entry_get_rw)( op, &bv_name, NULL, NULL, 0, &e );
 577                         if ( rc == LDAP_SUCCESS ) {
 578                                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifiersName );
 579                                 if ( a != NULL ) {
 580                                         ber_dupbv( &bv_modifiersName, &a->a_vals[0] );
 581                                         ber_dupbv( &bv_nmodifiersName, &a->a_nvals[0] );
 582                                 }
 583                                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryCSN );
 584                                 if ( a != NULL ) {
 585                                         ber_dupbv( &bv_entryCSN, &a->a_vals[0] );
 586                                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 587                                                 ber_dupbv( &bv_nentryCSN, &a->a_nvals[0] );
 588                                         } else {
 589                                                 ber_dupbv( &bv_nentryCSN, &a->a_vals[0] );
 590                                         }
 591                                 }
 592                                 a = attr_find( e->e_attrs, slap_schema.si_ad_modifyTimestamp );
 593                                 if ( a != NULL ) {
 594                                         ber_dupbv( &bv_modifyTimestamp, &a->a_vals[0] );
 595                                         if ( a->a_nvals && !BER_BVISNULL( &a->a_nvals[0] ) ) {
 596                                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_nvals[0] );
 597                                         } else {
 598                                                 ber_dupbv( &bv_nmodifyTimestamp, &a->a_vals[0] );
 599                                         }
 600                                 }
 601
 602                                 assert( dn_match( &bv_name, &e->e_name ) );
 603                                 assert( dn_match( &bv_nname, &e->e_nname ) );
 604
 605                                 (*op->o_bd->bd_info->bi_entry_release_rw)( op, e, 0 );
 606                         }
 607
 608                         op->o_bd->bd_info = bi;
 609
 610                 }
 611
 612                 /* if !bi_entry_get_rw || bi_entry_get_rw failed for any reason... */
 613                 if ( e == NULL ) {
 614                         best_guess( op, &bv_entryCSN, &bv_nentryCSN,
 615                                         &bv_modifyTimestamp, &bv_nmodifyTimestamp,
 616                                         &bv_modifiersName, &bv_nmodifiersName );
 617                 }
 618
 619                 break;
 620
 621         default:
 622                 return -1;
 623         }
 624
 625         ldap_pvt_thread_mutex_lock( &lmi->lmi_entry_mutex );
 626
 627 #if 0
 628         fprintf( stderr, "### lastmodDN: %s %s\n", bv_name.bv_val, bv_nname.bv_val );
 629 #endif
 630
 631         a = attr_find( lmi->lmi_e->e_attrs, lastmod_schema.lms_ad_lastmodDN );
 632         if ( a == NULL ) {
 633                 goto error_return;
 634         }
 635         ch_free( a->a_vals[0].bv_val );
 636         a->a_vals[0] = bv_name;
 637         ch_free( a->a_nvals[0].bv_val );
 638         a->a_nvals[0] = bv_nname;
 639
 640 #if 0
 641         fprintf( stderr, "### lastmodType: %s %s\n", lastmodType[ lmt ].bv_val, lastmodType[ lmt ].bv_val );
 642 #endif
 643
 644         a = attr_find( lmi->lmi_e->e_attrs, lastmod_schema.lms_ad_lastmodType );
 645         if ( a == NULL ) {
 646                 goto error_return;
 647         }
 648         ch_free( a->a_vals[0].bv_val );
 649         ber_dupbv( &a->a_vals[0], &lastmodType[ lmt ] );
 650         ch_free( a->a_nvals[0].bv_val );
 651         ber_dupbv( &a->a_nvals[0], &lastmodType[ lmt ] );
 652
 653 #if 0
 654         fprintf( stderr, "### modifiersName: %s %s\n", bv_modifiersName.bv_val, bv_nmodifiersName.bv_val );
 655 #endif
 656
 657         a = attr_find( lmi->lmi_e->e_attrs, slap_schema.si_ad_modifiersName );
 658         if ( a == NULL ) {
 659                 goto error_return;
 660         }
 661         ch_free( a->a_vals[0].bv_val );
 662         a->a_vals[0] = bv_modifiersName;
 663         ch_free( a->a_nvals[0].bv_val );
 664         a->a_nvals[0] = bv_nmodifiersName;
 665
 666 #if 0
 667         fprintf( stderr, "### modifyTimestamp: %s %s\n", bv_nmodifyTimestamp.bv_val, bv_modifyTimestamp.bv_val );
 668 #endif
 669
 670         a = attr_find( lmi->lmi_e->e_attrs, slap_schema.si_ad_modifyTimestamp );
 671         if ( a == NULL ) {
 672                 goto error_return;
 673         }
 674         ch_free( a->a_vals[0].bv_val );
 675         a->a_vals[0] = bv_modifyTimestamp;
 676         ch_free( a->a_nvals[0].bv_val );
 677         a->a_nvals[0] = bv_nmodifyTimestamp;
 678
 679 #if 0
 680         fprintf( stderr, "### entryCSN: %s %s\n", bv_nentryCSN.bv_val, bv_entryCSN.bv_val );
 681 #endif
 682
 683         a = attr_find( lmi->lmi_e->e_attrs, slap_schema.si_ad_entryCSN );
 684         if ( a == NULL ) {
 685                 goto error_return;
 686         }
 687         ch_free( a->a_vals[0].bv_val );
 688         a->a_vals[0] = bv_entryCSN;
 689         ch_free( a->a_nvals[0].bv_val );
 690         a->a_nvals[0] = bv_nentryCSN;
 691
 692         rc = 0;
 693
 694 error_return:;
 695         ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 696
 697         return rc;
 698 }
 699
 700 static int
 701 lastmod_response( Operation *op, SlapReply *rs )
 702 {
 703         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 704         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 705         unsigned int            i;
 706
 707         /* don't record failed operations */
 708         switch ( rs->sr_err ) {
 709         case LDAP_SUCCESS:
 710                 /* FIXME: other cases? */
 711                 break;
 712
 713         default:
 714                 return SLAP_CB_CONTINUE;
 715         }
 716
 717         /* record only write operations */
 718         switch ( op->o_tag ) {
 719         case LDAP_REQ_ADD:
 720         case LDAP_REQ_MODIFY:
 721         case LDAP_REQ_MODRDN:
 722         case LDAP_REQ_DELETE:
 723                 break;
 724
 725         case LDAP_REQ_EXTENDED:
 726                 /* if write, process */
 727                 if ( exop_is_write( op ))
 728                         break;
 729
 730                 /* fall thru */
 731         default:
 732                 return SLAP_CB_CONTINUE;
 733         }
 734
 735         /* skip if disabled */
 736         ldap_pvt_thread_mutex_lock( &lmi->lmi_entry_mutex );
 737         if ( !lmi->lmi_enabled ) {
 738                 ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 739                 return SLAP_CB_CONTINUE;
 740         }
 741         ldap_pvt_thread_mutex_unlock( &lmi->lmi_entry_mutex );
 742
 743 process:;
 744         (void)lastmod_update( op, rs );
 745
 746         return SLAP_CB_CONTINUE;
 747 }
 748
 749 static int
 750 lastmod_db_init(
 751         BackendDB *be
 752 )
 753 {
 754         slap_overinst           *on = (slap_overinst *)be->bd_info;
 755         lastmod_info_t          *lmi;
 756
 757         if ( lastmod_schema.lms_oc_lastmod == NULL ) {
 758                 int             i;
 759                 const char      *text;
 760
 761                 /* schema integration */
 762                 for ( i = 0; mat[i].name; i++ ) {
 763                         LDAPAttributeType       *at;
 764                         int                     code;
 765                         const char              *err;
 766                         AttributeDescription    **ad;
 767
 768                         at = ldap_str2attributetype( mat[i].schema, &code,
 769                                 &err, LDAP_SCHEMA_ALLOW_ALL );
 770                         if ( !at ) {
 771                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 772                                         "in AttributeType '%s' %s before %s\n",
 773                                         mat[i].name, ldap_scherr2str(code), err );
 774                                 return -1;
 775                         }
 776
 777                         if ( at->at_oid == NULL ) {
 778                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 779                                         "null OID for attributeType '%s'\n",
 780                                         mat[i].name, 0, 0 );
 781                                 return -1;
 782                         }
 783
 784                         code = at_add(at, 0, NULL, &err);
 785                         if ( code ) {
 786                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 787                                         "%s in attributeType '%s'\n",
 788                                         scherr2str(code), mat[i].name, 0 );
 789                                 return -1;
 790                         }
 791                         ldap_memfree(at);
 792
 793                         ad = ((AttributeDescription **)&(((char *)&lastmod_schema)[mat[i].offset]));
 794                         ad[0] = NULL;
 795                         if ( slap_str2ad( mat[i].name, ad, &text ) ) {
 796                                 Debug( LDAP_DEBUG_ANY,
 797                                         "lastmod_init: %s\n", text, 0, 0 );
 798                                 return -1;
 799                         }
 800
 801                         (*ad)->ad_type->sat_flags |= mat[i].flags;
 802                 }
 803
 804                 for ( i = 0; moc[i].name; i++ ) {
 805                         LDAPObjectClass         *oc;
 806                         int                     code;
 807                         const char              *err;
 808                         ObjectClass             *Oc;
 809
 810                         oc = ldap_str2objectclass(moc[i].schema, &code, &err,
 811                                         LDAP_SCHEMA_ALLOW_ALL );
 812                         if ( !oc ) {
 813                                 Debug( LDAP_DEBUG_ANY,
 814                                         "unable to parse lastmod objectClass '%s': "
 815                                         "%s before %s\n" , moc[i].name,
 816                                         ldap_scherr2str(code), err );
 817                                 return -1;
 818                         }
 819
 820                         if ( oc->oc_oid == NULL ) {
 821                                 Debug( LDAP_DEBUG_ANY,
 822                                         "objectClass '%s' has no OID\n" ,
 823                                         moc[i].name, 0, 0 );
 824                                 return -1;
 825                         }
 826
 827                         code = oc_add(oc, 0, NULL, &err);
 828                         if ( code ) {
 829                                 Debug( LDAP_DEBUG_ANY,
 830                                         "objectClass '%s': %s \"%s\"\n" ,
 831                                         moc[i].name, scherr2str(code), err );
 832                                 return -1;
 833                         }
 834
 835                         ldap_memfree(oc);
 836
 837                         Oc = oc_find( moc[i].name );
 838                         if ( Oc == NULL ) {
 839                                 Debug( LDAP_DEBUG_ANY, "lastmod_init: "
 840                                                 "unable to find objectClass %s "
 841                                                 "(just added)\n", moc[i].name, 0, 0 );
 842                                 return -1;
 843                         }
 844
 845                         Oc->soc_flags |= moc[i].flags;
 846
 847                         ((ObjectClass **)&(((char *)&lastmod_schema)[moc[i].offset]))[0] = Oc;
 848                 }
 849         }
 850
 851         lmi = (lastmod_info_t *)ch_malloc( sizeof( lastmod_info_t ) );
 852
 853         memset( lmi, 0, sizeof( lastmod_info_t ) );
 854         lmi->lmi_enabled = 1;
 855
 856         on->on_bi.bi_private = lmi;
 857
 858         return 0;
 859 }
 860
 861 static int
 862 lastmod_db_config(
 863         BackendDB       *be,
 864         const char      *fname,
 865         int             lineno,
 866         int             argc,
 867         char    **argv
 868 )
 869 {
 870         slap_overinst           *on = (slap_overinst *)be->bd_info;
 871         lastmod_info_t          *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 872
 873         if ( strcasecmp( argv[ 0 ], "lastmod-rdnvalue" ) == 0 ) {
 874                 if ( lmi->lmi_rdnvalue.bv_val ) {
 875                         /* already defined! */
 876                         ch_free( lmi->lmi_rdnvalue.bv_val );
 877                 }
 878
 879                 ber_str2bv( argv[ 1 ], 0, 1, &lmi->lmi_rdnvalue );
 880
 881         } else if ( strcasecmp( argv[ 0 ], "lastmod-enabled" ) == 0 ) {
 882                 if ( strcasecmp( argv[ 1 ], "yes" ) == 0 ) {
 883                         lmi->lmi_enabled = 1;
 884
 885                 } else if ( strcasecmp( argv[ 1 ], "no" ) == 0 ) {
 886                         lmi->lmi_enabled = 0;
 887
 888                 } else {
 889                         return -1;
 890                 }
 891
 892         } else {
 893                 return SLAP_CONF_UNKNOWN;
 894         }
 895
 896         return 0;
 897 }
 898
 899 static int
 900 lastmod_db_open(
 901         BackendDB *be
 902 )
 903 {
 904         slap_overinst   *on = (slap_overinst *) be->bd_info;
 905         lastmod_info_t  *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 906         char            buf[ 8192 ];
 907         struct tm               *tms;
 908 #ifdef HAVE_GMTIME_R
 909         struct tm               tm_buf;
 910 #endif
 911         static char             tmbuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 912
 913         char                    csnbuf[ LDAP_LUTIL_CSNSTR_BUFSIZE ];
 914         struct berval           entryCSN;
 915
 916         if ( !SLAP_LASTMOD( be ) ) {
 917                 fprintf( stderr, "set \"lastmod on\" to make this overlay effective\n" );
 918                 return -1;
 919         }
 920
 921         /*
 922          * Start
 923          */
 924 #ifndef HAVE_GMTIME_R
 925         ldap_pvt_thread_mutex_lock( &gmtime_mutex );
 926         tms = gmtime( &starttime );
 927 #else /* HAVE_GMTIME_R */
 928         tms = gmtime_r( &starttime, &tm_buf );
 929 #endif /* HAVE_GMTIME_R */
 930         lutil_gentime( tmbuf, sizeof(tmbuf), tms );
 931 #ifndef HAVE_GMTIME_R
 932         ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
 933 #endif
 934
 935         slap_get_csn( NULL, csnbuf, sizeof(csnbuf), &entryCSN, 0 );
 936
 937         if ( BER_BVISNULL( &lmi->lmi_rdnvalue ) ) {
 938                 ber_str2bv( "Lastmod", 0, 1, &lmi->lmi_rdnvalue );
 939         }
 940
 941         snprintf( buf, sizeof( buf ),
 942                         "dn: cn=%s%s%s\n"
 943                         "objectClass: %s\n"
 944                         "structuralObjectClass: %s\n"
 945                         "cn: %s\n"
 946                         "description: This object contains the last modification to this database\n"
 947                         "%s: cn=%s%s%s\n"
 948                         "%s: %s\n"
 949                         "%s: %s\n"
 950                         "createTimestamp: %s\n"
 951                         "creatorsName: %s\n"
 952                         "entryCSN: %s\n"
 953                         "modifyTimestamp: %s\n"
 954                         "modifiersName: %s\n"
 955                         "hasSubordinates: FALSE\n",
 956                         lmi->lmi_rdnvalue.bv_val, BER_BVISEMPTY( &be->be_suffix[ 0 ] ) ? "" : ",", be->be_suffix[ 0 ].bv_val,
 957                         lastmod_schema.lms_oc_lastmod->soc_cname.bv_val,
 958                         lastmod_schema.lms_oc_lastmod->soc_cname.bv_val,
 959                         lmi->lmi_rdnvalue.bv_val,
 960                         lastmod_schema.lms_ad_lastmodDN->ad_cname.bv_val,
 961                                 lmi->lmi_rdnvalue.bv_val, BER_BVISEMPTY( &be->be_suffix[ 0 ] ) ? "" : ",", be->be_suffix[ 0 ].bv_val,
 962                         lastmod_schema.lms_ad_lastmodType->ad_cname.bv_val, lastmodType[ LASTMOD_ADD ].bv_val,
 963                         lastmod_schema.lms_ad_lastmodEnabled->ad_cname.bv_val, lmi->lmi_enabled ? "TRUE" : "FALSE",
 964                         tmbuf,
 965                         BER_BVISNULL( &be->be_rootdn ) ? SLAPD_ANONYMOUS : be->be_rootdn.bv_val,
 966                         entryCSN.bv_val,
 967                         tmbuf,
 968                         BER_BVISNULL( &be->be_rootdn ) ? SLAPD_ANONYMOUS : be->be_rootdn.bv_val );
 969
 970 #if 0
 971         fprintf( stderr, "# entry:\n%s\n", buf );
 972 #endif
 973
 974         lmi->lmi_e = str2entry( buf );
 975         if ( lmi->lmi_e == NULL ) {
 976                 return -1;
 977         }
 978
 979         ldap_pvt_thread_mutex_init( &lmi->lmi_entry_mutex );
 980
 981         return 0;
 982 }
 983
 984 static int
 985 lastmod_db_destroy(
 986         BackendDB *be
 987 )
 988 {
 989         slap_overinst   *on = (slap_overinst *)be->bd_info;
 990         lastmod_info_t  *lmi = (lastmod_info_t *)on->on_bi.bi_private;
 991
 992         if ( lmi ) {
 993                 if ( !BER_BVISNULL( &lmi->lmi_rdnvalue ) ) {
 994                         ch_free( lmi->lmi_rdnvalue.bv_val );
 995                 }
 996
 997                 if ( lmi->lmi_e ) {
 998                         entry_free( lmi->lmi_e );
 999
1000                         ldap_pvt_thread_mutex_destroy( &lmi->lmi_entry_mutex );
1001                 }
1002
1003                 ch_free( lmi );
1004         }
1005
1006         return 0;
1007 }
1008
1009 /* This overlay is set up for dynamic loading via moduleload. For static
1010  * configuration, you'll need to arrange for the slap_overinst to be
1011  * initialized and registered by some other function inside slapd.
1012  */
1013
1014 static slap_overinst            lastmod;
1015
1016 int
1017 lastmod_init()
1018 {
1019         lastmod.on_bi.bi_type = "lastmod";
1020         lastmod.on_bi.bi_db_init = lastmod_db_init;
1021         lastmod.on_bi.bi_db_config = lastmod_db_config;
1022         lastmod.on_bi.bi_db_destroy = lastmod_db_destroy;
1023         lastmod.on_bi.bi_db_open = lastmod_db_open;
1024
1025         lastmod.on_bi.bi_op_add = lastmod_op_func;
1026         lastmod.on_bi.bi_op_compare = lastmod_op_func;
1027         lastmod.on_bi.bi_op_delete = lastmod_op_func;
1028         lastmod.on_bi.bi_op_modify = lastmod_op_func;
1029         lastmod.on_bi.bi_op_modrdn = lastmod_op_func;
1030         lastmod.on_bi.bi_op_search = lastmod_op_func;
1031         lastmod.on_bi.bi_extended = lastmod_op_func;
1032
1033         lastmod.on_response = lastmod_response;
1034
1035         return overlay_register( &lastmod );
1036 }
1037
1038 #if SLAPD_OVER_LASTMOD == SLAPD_MOD_DYNAMIC
1039 int
1040 init_module( int argc, char *argv[] )
1041 {
1042         return lastmod_init();
1043 }
1044 #endif /* SLAPD_OVER_LASTMOD == SLAPD_MOD_DYNAMIC */
1045
1046 #endif /* defined(SLAPD_OVER_LASTMOD) */