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