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

   1 /* mr.c - routines to manage matching rule definitions */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2004 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20
  21 #include <ac/ctype.h>
  22 #include <ac/string.h>
  23 #include <ac/socket.h>
  24
  25 #include "slap.h"
  26 #include "ldap_pvt.h"
  27
  28 struct mindexrec {
  29         struct berval   mir_name;
  30         MatchingRule    *mir_mr;
  31 };
  32
  33 static Avlnode  *mr_index = NULL;
  34 static LDAP_SLIST_HEAD(MRList, slap_matching_rule) mr_list
  35         = LDAP_SLIST_HEAD_INITIALIZER(&mr_list);
  36 static LDAP_SLIST_HEAD(MRUList, slap_matching_rule_use) mru_list
  37         = LDAP_SLIST_HEAD_INITIALIZER(&mru_list);
  38
  39 static int
  40 mr_index_cmp(
  41     const void  *v_mir1,
  42     const void  *v_mir2
  43 )
  44 {
  45         const struct mindexrec  *mir1 = v_mir1;
  46         const struct mindexrec  *mir2 = v_mir2;
  47         int i = mir1->mir_name.bv_len - mir2->mir_name.bv_len;
  48         if (i) return i;
  49         return (strcasecmp( mir1->mir_name.bv_val, mir2->mir_name.bv_val ));
  50 }
  51
  52 static int
  53 mr_index_name_cmp(
  54     const void  *v_name,
  55     const void  *v_mir
  56 )
  57 {
  58         const struct berval    *name = v_name;
  59         const struct mindexrec *mir  = v_mir;
  60         int i = name->bv_len - mir->mir_name.bv_len;
  61         if (i) return i;
  62         return (strncasecmp( name->bv_val, mir->mir_name.bv_val, name->bv_len ));
  63 }
  64
  65 MatchingRule *
  66 mr_find( const char *mrname )
  67 {
  68         struct berval bv;
  69
  70         bv.bv_val = (char *)mrname;
  71         bv.bv_len = strlen( mrname );
  72         return mr_bvfind( &bv );
  73 }
  74
  75 MatchingRule *
  76 mr_bvfind( struct berval *mrname )
  77 {
  78         struct mindexrec        *mir = NULL;
  79
  80         if ( (mir = avl_find( mr_index, mrname, mr_index_name_cmp )) != NULL ) {
  81                 return( mir->mir_mr );
  82         }
  83         return( NULL );
  84 }
  85
  86 void
  87 mr_destroy( void )
  88 {
  89         MatchingRule *m;
  90
  91         avl_free(mr_index, ldap_memfree);
  92         while( !LDAP_SLIST_EMPTY(&mr_list) ) {
  93                 m = LDAP_SLIST_FIRST(&mr_list);
  94                 LDAP_SLIST_REMOVE_HEAD(&mr_list, smr_next);
  95                 ch_free( m->smr_str.bv_val );
  96                 ch_free( m->smr_compat_syntaxes );
  97                 ldap_matchingrule_free((LDAPMatchingRule *)m);
  98         }
  99 }
 100
 101 static int
 102 mr_insert(
 103     MatchingRule        *smr,
 104     const char          **err
 105 )
 106 {
 107         struct mindexrec        *mir;
 108         char                    **names;
 109
 110         LDAP_SLIST_NEXT( smr, smr_next ) = NULL;
 111         LDAP_SLIST_INSERT_HEAD(&mr_list, smr, smr_next);
 112
 113         if ( smr->smr_oid ) {
 114                 mir = (struct mindexrec *)
 115                         ch_calloc( 1, sizeof(struct mindexrec) );
 116                 mir->mir_name.bv_val = smr->smr_oid;
 117                 mir->mir_name.bv_len = strlen( smr->smr_oid );
 118                 mir->mir_mr = smr;
 119                 if ( avl_insert( &mr_index, (caddr_t) mir,
 120                                  mr_index_cmp, avl_dup_error ) ) {
 121                         *err = smr->smr_oid;
 122                         ldap_memfree(mir);
 123                         return SLAP_SCHERR_MR_DUP;
 124                 }
 125                 /* FIX: temporal consistency check */
 126                 mr_bvfind(&mir->mir_name);
 127         }
 128         if ( (names = smr->smr_names) ) {
 129                 while ( *names ) {
 130                         mir = (struct mindexrec *)
 131                                 ch_calloc( 1, sizeof(struct mindexrec) );
 132                         mir->mir_name.bv_val = *names;
 133                         mir->mir_name.bv_len = strlen( *names );
 134                         mir->mir_mr = smr;
 135                         if ( avl_insert( &mr_index, (caddr_t) mir,
 136                                          mr_index_cmp, avl_dup_error ) ) {
 137                                 *err = *names;
 138                                 ldap_memfree(mir);
 139                                 return SLAP_SCHERR_MR_DUP;
 140                         }
 141                         /* FIX: temporal consistency check */
 142                         mr_bvfind(&mir->mir_name);
 143                         names++;
 144                 }
 145         }
 146         return 0;
 147 }
 148
 149 int
 150 mr_add(
 151     LDAPMatchingRule            *mr,
 152     slap_mrule_defs_rec *def,
 153         MatchingRule    *amr,
 154     const char          **err
 155 )
 156 {
 157         MatchingRule    *smr;
 158         Syntax          *syn;
 159         Syntax          **compat_syn = NULL;
 160         int             code;
 161
 162         if( def->mrd_compat_syntaxes ) {
 163                 int i;
 164                 for( i=0; def->mrd_compat_syntaxes[i]; i++ ) {
 165                         /* just count em */
 166                 }
 167
 168                 compat_syn = ch_malloc( sizeof(Syntax *) * (i+1) );
 169
 170                 for( i=0; def->mrd_compat_syntaxes[i]; i++ ) {
 171                         compat_syn[i] = syn_find( def->mrd_compat_syntaxes[i] );
 172                         if( compat_syn[i] == NULL ) {
 173                                 return SLAP_SCHERR_SYN_NOT_FOUND;
 174                         }
 175                 }
 176
 177                 compat_syn[i] = NULL;
 178         }
 179
 180         smr = (MatchingRule *) ch_calloc( 1, sizeof(MatchingRule) );
 181         AC_MEMCPY( &smr->smr_mrule, mr, sizeof(LDAPMatchingRule));
 182
 183         /*
 184          * note: smr_bvoid uses the same memory of smr_mrule.mr_oid;
 185          * smr_oidlen is #defined as smr_bvoid.bv_len
 186          */
 187         smr->smr_bvoid.bv_val = smr->smr_mrule.mr_oid;
 188         smr->smr_oidlen = strlen( mr->mr_oid );
 189         smr->smr_usage = def->mrd_usage;
 190         smr->smr_compat_syntaxes = compat_syn;
 191         smr->smr_normalize = def->mrd_normalize;
 192         smr->smr_match = def->mrd_match;
 193         smr->smr_indexer = def->mrd_indexer;
 194         smr->smr_filter = def->mrd_filter;
 195         smr->smr_associated = amr;
 196
 197         if ( smr->smr_syntax_oid ) {
 198                 if ( (syn = syn_find(smr->smr_syntax_oid)) ) {
 199                         smr->smr_syntax = syn;
 200                 } else {
 201                         *err = smr->smr_syntax_oid;
 202                         return SLAP_SCHERR_SYN_NOT_FOUND;
 203                 }
 204         } else {
 205                 *err = "";
 206                 return SLAP_SCHERR_MR_INCOMPLETE;
 207         }
 208         code = mr_insert(smr,err);
 209         return code;
 210 }
 211
 212 int
 213 register_matching_rule(
 214         slap_mrule_defs_rec *def )
 215 {
 216         LDAPMatchingRule *mr;
 217         MatchingRule *amr = NULL;
 218         int             code;
 219         const char      *err;
 220
 221         if( def->mrd_usage == SLAP_MR_NONE &&
 222                 def->mrd_compat_syntaxes == NULL )
 223         {
 224                 Debug( LDAP_DEBUG_ANY, "register_matching_rule: not usable %s\n",
 225                     def->mrd_desc, 0, 0 );
 226
 227                 return -1;
 228         }
 229
 230         if( def->mrd_associated != NULL ) {
 231                 amr = mr_find( def->mrd_associated );
 232
 233                 if( amr == NULL ) {
 234                         Debug( LDAP_DEBUG_ANY, "register_matching_rule: could not locate "
 235                                 "associated matching rule %s for %s\n",
 236                                 def->mrd_associated, def->mrd_desc, 0 );
 237
 238                         return -1;
 239                 }
 240
 241                 if (( def->mrd_usage & SLAP_MR_EQUALITY ) &&
 242                         (( def->mrd_usage & SLAP_MR_SUBTYPE_MASK ) == SLAP_MR_NONE ))
 243                 {
 244                         if (( def->mrd_usage & SLAP_MR_EQUALITY ) &&
 245                                 (( def->mrd_usage & SLAP_MR_SUBTYPE_MASK ) != SLAP_MR_NONE ))
 246                         {
 247                                 Debug( LDAP_DEBUG_ANY,
 248                                    "register_matching_rule: inappropriate (approx) association "
 249                                                 "%s for %s\n",
 250                                         def->mrd_associated, def->mrd_desc, 0 );
 251                                 return -1;
 252                         }
 253
 254                 } else if (!( amr->smr_usage & SLAP_MR_EQUALITY )) {
 255                                 Debug( LDAP_DEBUG_ANY,
 256                                    "register_matching_rule: inappropriate (equalilty) association "
 257                                                 "%s for %s\n",
 258                                         def->mrd_associated, def->mrd_desc, 0 );
 259                                 return -1;
 260                 }
 261         }
 262
 263         mr = ldap_str2matchingrule( def->mrd_desc, &code, &err,
 264                 LDAP_SCHEMA_ALLOW_ALL );
 265         if ( !mr ) {
 266                 Debug( LDAP_DEBUG_ANY,
 267                         "Error in register_matching_rule: %s before %s in %s\n",
 268                     ldap_scherr2str(code), err, def->mrd_desc );
 269
 270                 return -1;
 271         }
 272
 273
 274         code = mr_add( mr, def, amr, &err );
 275
 276         ldap_memfree( mr );
 277
 278         if ( code ) {
 279                 Debug( LDAP_DEBUG_ANY,
 280                         "Error in register_matching_rule: %s for %s in %s\n",
 281                     scherr2str(code), err, def->mrd_desc );
 282
 283                 return -1;
 284         }
 285
 286         return 0;
 287 }
 288
 289 void
 290 mru_destroy( void )
 291 {
 292         MatchingRuleUse *m;
 293
 294         while( !LDAP_SLIST_EMPTY(&mru_list) ) {
 295                 m = LDAP_SLIST_FIRST(&mru_list);
 296                 LDAP_SLIST_REMOVE_HEAD(&mru_list, smru_next);
 297
 298                 if ( m->smru_str.bv_val ) {
 299                         ch_free( m->smru_str.bv_val );
 300                         m->smru_str.bv_val = NULL;
 301                 }
 302                 /* memory borrowed from m->smru_mr */
 303                 m->smru_oid = NULL;
 304                 m->smru_names = NULL;
 305                 m->smru_desc = NULL;
 306
 307                 /* free what's left (basically smru_mruleuse.mru_applies_oids) */
 308                 ldap_matchingruleuse_free((LDAPMatchingRuleUse *)m);
 309         }
 310 }
 311
 312 int
 313 matching_rule_use_init( void )
 314 {
 315         MatchingRule    *mr;
 316         MatchingRuleUse **mru_ptr = &LDAP_SLIST_FIRST(&mru_list);
 317
 318         Debug( LDAP_DEBUG_TRACE, "matching_rule_use_init\n", 0, 0, 0 );
 319
 320         LDAP_SLIST_FOREACH( mr, &mr_list, smr_next ) {
 321                 AttributeType   *at;
 322                 MatchingRuleUse mru_storage, *mru = &mru_storage;
 323
 324                 char            **applies_oids = NULL;
 325
 326                 mr->smr_mru = NULL;
 327
 328                 /* hide rules marked as HIDE */
 329                 if ( mr->smr_usage & SLAP_MR_HIDE ) {
 330                         continue;
 331                 }
 332
 333                 /* hide rules not marked as designed for extensibility */
 334                 /* MR_EXT means can be used any attribute type whose
 335                  * syntax is same as the assertion syntax.
 336                  * Another mechanism is needed where rule can be used
 337                  * with attribute of other syntaxes.
 338                  * Framework doesn't support this (yet).
 339                  */
 340
 341                 if (!( ( mr->smr_usage & SLAP_MR_EXT )
 342                         || mr->smr_compat_syntaxes ) )
 343                 {
 344                         continue;
 345                 }
 346
 347                 memset( mru, 0, sizeof( MatchingRuleUse ) );
 348
 349                 /*
 350                  * Note: we're using the same values of the corresponding
 351                  * MatchingRule structure; maybe we'd copy them ...
 352                  */
 353                 mru->smru_mr = mr;
 354                 mru->smru_obsolete = mr->smr_obsolete;
 355                 mru->smru_applies_oids = NULL;
 356                 LDAP_SLIST_NEXT(mru, smru_next) = NULL;
 357                 mru->smru_oid = mr->smr_oid;
 358                 mru->smru_names = mr->smr_names;
 359                 mru->smru_desc = mr->smr_desc;
 360
 361                 Debug( LDAP_DEBUG_TRACE, "    %s (%s): ",
 362                                 mru->smru_oid,
 363                                 mru->smru_names ? mru->smru_names[ 0 ] : "", 0 );
 364
 365                 at = NULL;
 366                 for ( at_start( &at ); at; at_next( &at ) ) {
 367                         if( at->sat_flags & SLAP_AT_HIDE ) continue;
 368
 369                         if( mr_usable_with_at( mr, at )) {
 370                                 ldap_charray_add( &applies_oids, at->sat_cname.bv_val );
 371                         }
 372                 }
 373
 374                 /*
 375                  * Note: the matchingRules that are not used
 376                  * by any attributeType are not listed as
 377                  * matchingRuleUse
 378                  */
 379                 if ( applies_oids != NULL ) {
 380                         mru->smru_applies_oids = applies_oids;
 381                         {
 382                                 char *str = ldap_matchingruleuse2str( &mru->smru_mruleuse );
 383                                 Debug( LDAP_DEBUG_TRACE, "matchingRuleUse: %s\n", str, 0, 0 );
 384                                 ldap_memfree( str );
 385                         }
 386
 387                         mru = (MatchingRuleUse *)ber_memalloc( sizeof( MatchingRuleUse ) );
 388                         /* call-forward from MatchingRule to MatchingRuleUse */
 389                         mr->smr_mru = mru;
 390                         /* copy static data to newly allocated struct */
 391                         *mru = mru_storage;
 392                         /* append the struct pointer to the end of the list */
 393                         *mru_ptr = mru;
 394                         /* update the list head pointer */
 395                         mru_ptr = &LDAP_SLIST_NEXT(mru,smru_next);
 396                 }
 397         }
 398
 399         return( 0 );
 400 }
 401
 402 int mr_usable_with_at(
 403         MatchingRule *mr,
 404         AttributeType *at )
 405 {
 406         if( mr->smr_usage & SLAP_MR_EXT && (
 407                 mr->smr_syntax == at->sat_syntax ||
 408                 mr == at->sat_equality || mr == at->sat_approx ) )
 409         {
 410                 return 1;
 411         }
 412
 413         if ( mr->smr_compat_syntaxes ) {
 414                 int i;
 415                 for( i=0; mr->smr_compat_syntaxes[i]; i++ ) {
 416                         if( at->sat_syntax == mr->smr_compat_syntaxes[i] ) {
 417                                 return 1;
 418                         }
 419                 }
 420         }
 421         return 0;
 422 }
 423
 424 int mr_schema_info( Entry *e )
 425 {
 426         AttributeDescription *ad_matchingRules = slap_schema.si_ad_matchingRules;
 427         MatchingRule *mr;
 428         struct berval nval;
 429
 430         LDAP_SLIST_FOREACH(mr, &mr_list, smr_next ) {
 431                 if ( mr->smr_usage & SLAP_MR_HIDE ) {
 432                         /* skip hidden rules */
 433                         continue;
 434                 }
 435
 436                 if ( ! mr->smr_match ) {
 437                         /* skip rules without matching functions */
 438                         continue;
 439                 }
 440
 441                 if ( mr->smr_str.bv_val == NULL ) {
 442                         if ( ldap_matchingrule2bv( &mr->smr_mrule, &mr->smr_str ) == NULL ) {
 443                                 return -1;
 444                         }
 445                 }
 446 #if 0
 447                 Debug( LDAP_DEBUG_TRACE, "Merging mr [%lu] %s\n",
 448                         mr->smr_str.bv_len, mr->smr_str.bv_val, 0 );
 449 #endif
 450
 451                 nval.bv_val = mr->smr_oid;
 452                 nval.bv_len = strlen(mr->smr_oid);
 453                 if( attr_merge_one( e, ad_matchingRules, &mr->smr_str, &nval ) ) {
 454                         return -1;
 455                 }
 456         }
 457         return 0;
 458 }
 459
 460 int mru_schema_info( Entry *e )
 461 {
 462         AttributeDescription *ad_matchingRuleUse
 463                 = slap_schema.si_ad_matchingRuleUse;
 464         MatchingRuleUse *mru;
 465         struct berval nval;
 466
 467         LDAP_SLIST_FOREACH( mru, &mru_list, smru_next ) {
 468                 assert( !( mru->smru_usage & SLAP_MR_HIDE ) );
 469
 470                 if ( mru->smru_str.bv_val == NULL ) {
 471                         if ( ldap_matchingruleuse2bv( &mru->smru_mruleuse, &mru->smru_str )
 472                                         == NULL ) {
 473                                 return -1;
 474                         }
 475                 }
 476
 477 #if 0
 478                 Debug( LDAP_DEBUG_TRACE, "Merging mru [%lu] %s\n",
 479                         mru->smru_str.bv_len, mru->smru_str.bv_val, 0 );
 480 #endif
 481
 482                 nval.bv_val = mru->smru_oid;
 483                 nval.bv_len = strlen(mru->smru_oid);
 484                 if( attr_merge_one( e, ad_matchingRuleUse, &mru->smru_str, &nval ) ) {
 485                         return -1;
 486                 }
 487         }
 488         return 0;
 489 }