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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2004 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 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <ac/string.h>
  29
  30 #include "slap.h"
  31
  32 int
  33 modify_add_values(
  34         Entry           *e,
  35         Modification    *mod,
  36         int             permissive,
  37         const char      **text,
  38         char            *textbuf,
  39         size_t          textlen )
  40 {
  41         int             rc;
  42         const char      *op;
  43         Attribute       *a;
  44         Modification    pmod = *mod;
  45
  46         switch ( mod->sm_op ) {
  47         case LDAP_MOD_ADD:
  48                 op = "add";
  49                 break;
  50         case LDAP_MOD_REPLACE:
  51                 op = "replace";
  52                 break;
  53         default:
  54                 op = "?";
  55                 assert( 0 );
  56         }
  57
  58         /* check if values to add exist in attribute */
  59         a = attr_find( e->e_attrs, mod->sm_desc );
  60         if ( a != NULL ) {
  61                 int             rc, i, j, p;
  62                 MatchingRule    *mr;
  63
  64                 mr = mod->sm_desc->ad_type->sat_equality;
  65                 if( mr == NULL || !mr->smr_match ) {
  66                         /* do not allow add of additional attribute
  67                                 if no equality rule exists */
  68                         *text = textbuf;
  69                         snprintf( textbuf, textlen,
  70                                 "modify/%s: %s: no equality matching rule",
  71                                 op, mod->sm_desc->ad_cname.bv_val );
  72                         return LDAP_INAPPROPRIATE_MATCHING;
  73                 }
  74
  75                 if ( permissive ) {
  76                         for ( i = 0; !BER_BVISNULL( &mod->sm_values[i] ); i++ ) /* count 'em */;
  77                         pmod.sm_values = (BerVarray)ch_malloc( (i + 1)*sizeof( struct berval ) );
  78                         if ( pmod.sm_nvalues != NULL ) {
  79                                 pmod.sm_nvalues = (BerVarray)ch_malloc(
  80                                         (i + 1)*sizeof( struct berval ) );
  81                         }
  82                 }
  83
  84                 /* no normalization is done in this routine nor
  85                  * in the matching routines called by this routine.
  86                  * values are now normalized once on input to the
  87                  * server (whether from LDAP or from the underlying
  88                  * database).
  89                  */
  90                 for ( p = i = 0; !BER_BVISNULL( &mod->sm_values[i] ); i++ ) {
  91                         int     match;
  92
  93                         assert( a->a_vals[0].bv_val );
  94                         for ( j = 0; !BER_BVISNULL( &a->a_vals[j] ); j++ ) {
  95                                 if ( mod->sm_nvalues ) {
  96                                         rc = value_match( &match, mod->sm_desc, mr,
  97                                                 SLAP_MR_EQUALITY | SLAP_MR_VALUE_OF_ASSERTION_SYNTAX
  98                                                         | SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH
  99                                                         | SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH,
 100                                                 &a->a_nvals[j], &mod->sm_nvalues[i], text );
 101                                 } else {
 102                                         rc = value_match( &match, mod->sm_desc, mr,
 103                                                 SLAP_MR_EQUALITY | SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 104                                                 &a->a_vals[j], &mod->sm_values[i], text );
 105                                 }
 106
 107                                 if ( rc == LDAP_SUCCESS && match == 0 ) {
 108                                         /* value already exists */
 109                                         if ( permissive ) break;
 110
 111                                         *text = textbuf;
 112                                         snprintf( textbuf, textlen,
 113                                                 "modify/%s: %s: value #%d already exists",
 114                                                 op, mod->sm_desc->ad_cname.bv_val, i );
 115                                         return LDAP_TYPE_OR_VALUE_EXISTS;
 116
 117                                 } else if ( rc != LDAP_SUCCESS ) {
 118                                         return rc;
 119                                 }
 120                         }
 121
 122                         if ( permissive && match != 0 ) {
 123                                 if ( pmod.sm_nvalues ) {
 124                                         pmod.sm_nvalues[p] = mod->sm_nvalues[i];
 125                                 }
 126                                 pmod.sm_values[p++] = mod->sm_values[i];
 127                         }
 128                 }
 129
 130                 if ( permissive ) {
 131                         if ( p == 0 ) {
 132                                 /* all new values match exist */
 133                                 ch_free( pmod.sm_values );
 134                                 if ( pmod.sm_nvalues ) ch_free( pmod.sm_nvalues );
 135                                 return LDAP_SUCCESS;
 136                         }
 137
 138                         BER_BVZERO( &pmod.sm_values[p] );
 139                         if ( pmod.sm_nvalues ) {
 140                                 BER_BVZERO( &pmod.sm_nvalues[p] );
 141                         }
 142                 }
 143         }
 144
 145         /* no - add them */
 146         rc = attr_merge( e, mod->sm_desc, pmod.sm_values, pmod.sm_nvalues );
 147
 148         if ( a != NULL && permissive ) {
 149                 ch_free( pmod.sm_values );
 150                 if ( pmod.sm_nvalues ) ch_free( pmod.sm_nvalues );
 151         }
 152
 153         if ( rc != 0 ) {
 154                 /* this should return result of attr_merge */
 155                 *text = textbuf;
 156                 snprintf( textbuf, textlen,
 157                         "modify/%s: %s: merge error",
 158                         op, mod->sm_desc->ad_cname.bv_val );
 159                 return LDAP_OTHER;
 160         }
 161
 162         return LDAP_SUCCESS;
 163 }
 164
 165 int
 166 modify_delete_values(
 167         Entry   *e,
 168         Modification    *mod,
 169         int     permissive,
 170         const char      **text,
 171         char *textbuf, size_t textlen )
 172 {
 173         int             i, j, k, rc = LDAP_SUCCESS;
 174         Attribute       *a;
 175         MatchingRule    *mr = mod->sm_desc->ad_type->sat_equality;
 176         char            dummy = '\0';
 177         int                     match = 0;
 178
 179         /*
 180          * If permissive is set, then the non-existence of an
 181          * attribute is not treated as an error.
 182          */
 183
 184         /* delete the entire attribute */
 185         if ( mod->sm_values == NULL ) {
 186                 rc = attr_delete( &e->e_attrs, mod->sm_desc );
 187
 188                 if( permissive ) {
 189                         rc = LDAP_SUCCESS;
 190                 } else if( rc != LDAP_SUCCESS ) {
 191                         *text = textbuf;
 192                         snprintf( textbuf, textlen,
 193                                 "modify/delete: %s: no such attribute",
 194                                 mod->sm_desc->ad_cname.bv_val );
 195                         rc = LDAP_NO_SUCH_ATTRIBUTE;
 196                 }
 197                 return rc;
 198         }
 199
 200         if( mr == NULL || !mr->smr_match ) {
 201                 /* disallow specific attributes from being deleted if
 202                         no equality rule */
 203                 *text = textbuf;
 204                 snprintf( textbuf, textlen,
 205                         "modify/delete: %s: no equality matching rule",
 206                         mod->sm_desc->ad_cname.bv_val );
 207                 return LDAP_INAPPROPRIATE_MATCHING;
 208         }
 209
 210         /* delete specific values - find the attribute first */
 211         if ( (a = attr_find( e->e_attrs, mod->sm_desc )) == NULL ) {
 212                 if( permissive ) {
 213                         return LDAP_SUCCESS;
 214                 }
 215                 *text = textbuf;
 216                 snprintf( textbuf, textlen,
 217                         "modify/delete: %s: no such attribute",
 218                         mod->sm_desc->ad_cname.bv_val );
 219                 return LDAP_NO_SUCH_ATTRIBUTE;
 220         }
 221
 222         for ( i = 0; mod->sm_values[i].bv_val != NULL; i++ ) {
 223                 int     found = 0;
 224                 for ( j = 0; a->a_vals[j].bv_val != NULL; j++ ) {
 225
 226                         if( mod->sm_nvalues ) {
 227                                 assert( a->a_nvals );
 228                                 rc = (*mr->smr_match)( &match,
 229                                         SLAP_MR_VALUE_OF_ASSERTION_SYNTAX
 230                                                 | SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH
 231                                                 | SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH,
 232                                         a->a_desc->ad_type->sat_syntax,
 233                                         mr, &a->a_nvals[j],
 234                                         &mod->sm_nvalues[i] );
 235                         } else {
 236 #if 0
 237                                 assert( a->a_nvals == NULL );
 238 #endif
 239                                 rc = (*mr->smr_match)( &match,
 240                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 241                                         a->a_desc->ad_type->sat_syntax,
 242                                         mr, &a->a_vals[j],
 243                                         &mod->sm_values[i] );
 244                         }
 245
 246                         if ( rc != LDAP_SUCCESS ) {
 247                                 *text = textbuf;
 248                                 snprintf( textbuf, textlen,
 249                                         "%s: matching rule failed",
 250                                         mod->sm_desc->ad_cname.bv_val );
 251                                 break;
 252                         }
 253
 254                         if ( match != 0 ) {
 255                                 continue;
 256                         }
 257
 258                         found = 1;
 259
 260                         /* delete value and mark it as dummy */
 261                         free( a->a_vals[j].bv_val );
 262                         a->a_vals[j].bv_val = &dummy;
 263                         if( a->a_nvals != a->a_vals ) {
 264                                 free( a->a_nvals[j].bv_val );
 265                                 a->a_nvals[j].bv_val = &dummy;
 266                         }
 267
 268                         break;
 269                 }
 270
 271                 if ( found == 0 ) {
 272                         *text = textbuf;
 273                         snprintf( textbuf, textlen,
 274                                 "modify/delete: %s: no such value",
 275                                 mod->sm_desc->ad_cname.bv_val );
 276                         rc = LDAP_NO_SUCH_ATTRIBUTE;
 277                         if ( i > 0 ) {
 278                                 break;
 279                         } else {
 280                                 goto return_results;
 281                         }
 282                 }
 283         }
 284
 285         /* compact array skipping dummies */
 286         for ( k = 0, j = 0; a->a_vals[k].bv_val != NULL; k++ ) {
 287                 /* skip dummies */
 288                 if( a->a_vals[k].bv_val == &dummy ) {
 289                         assert( a->a_nvals == NULL || a->a_nvals[k].bv_val == &dummy );
 290                         continue;
 291                 }
 292                 if ( j != k ) {
 293                         a->a_vals[ j ] = a->a_vals[ k ];
 294                         if (a->a_nvals != a->a_vals) {
 295                                 a->a_nvals[ j ] = a->a_nvals[ k ];
 296                         }
 297                 }
 298
 299                 j++;
 300         }
 301
 302         a->a_vals[j].bv_val = NULL;
 303         if (a->a_nvals != a->a_vals) a->a_nvals[j].bv_val = NULL;
 304
 305         /* if no values remain, delete the entire attribute */
 306         if ( a->a_vals[0].bv_val == NULL ) {
 307                 if ( attr_delete( &e->e_attrs, mod->sm_desc ) ) {
 308                         *text = textbuf;
 309                         snprintf( textbuf, textlen,
 310                                 "modify/delete: %s: no such attribute",
 311                                 mod->sm_desc->ad_cname.bv_val );
 312                         rc = LDAP_NO_SUCH_ATTRIBUTE;
 313                 }
 314         }
 315
 316 return_results:;
 317
 318         return rc;
 319 }
 320
 321 int
 322 modify_replace_values(
 323         Entry   *e,
 324         Modification    *mod,
 325         int             permissive,
 326         const char      **text,
 327         char *textbuf, size_t textlen )
 328 {
 329         (void) attr_delete( &e->e_attrs, mod->sm_desc );
 330
 331         if ( mod->sm_values ) {
 332                 return modify_add_values( e, mod, permissive, text, textbuf, textlen );
 333         }
 334
 335         return LDAP_SUCCESS;
 336 }
 337
 338 int
 339 modify_increment_values(
 340         Entry   *e,
 341         Modification    *mod,
 342         int     permissive,
 343         const char      **text,
 344         char *textbuf, size_t textlen )
 345 {
 346         Attribute *a;
 347
 348         a = attr_find( e->e_attrs, mod->sm_desc );
 349         if( a == NULL ) {
 350                 *text = textbuf;
 351                 snprintf( textbuf, textlen,
 352                         "modify/increment: %s: no such attribute",
 353                         mod->sm_desc->ad_cname.bv_val );
 354                 return LDAP_NO_SUCH_ATTRIBUTE;
 355         }
 356
 357         if ( !strcmp( a->a_desc->ad_type->sat_syntax_oid, SLAPD_INTEGER_SYNTAX )) {
 358                 int i;
 359                 char str[sizeof(long)*3 + 2]; /* overly long */
 360                 long incr = atol( mod->sm_values[0].bv_val );
 361
 362                 /* treat zero and errors as a no-op */
 363                 if( incr == 0 ) {
 364                         return LDAP_SUCCESS;
 365                 }
 366
 367                 for( i=0; a->a_nvals[i].bv_val != NULL; i++ ) {
 368                         char *tmp;
 369                         long value = atol( a->a_nvals[i].bv_val );
 370                         size_t strln = snprintf( str, sizeof(str), "%ld", value+incr );
 371
 372                         tmp = SLAP_REALLOC( a->a_nvals[i].bv_val, strln+1 );
 373                         if( tmp == NULL ) {
 374                                 *text = "modify/increment: reallocation error";
 375                                 return LDAP_OTHER;;
 376                         }
 377                         a->a_nvals[i].bv_val = tmp;
 378                         a->a_nvals[i].bv_len = strln;
 379
 380                         AC_MEMCPY( a->a_nvals[i].bv_val, str, strln+1 );
 381                 }
 382
 383         } else {
 384                 snprintf( textbuf, textlen,
 385                         "modify/increment: %s: increment not supported for value syntax %s",
 386                         mod->sm_desc->ad_cname.bv_val,
 387                         a->a_desc->ad_type->sat_syntax_oid );
 388                 return LDAP_CONSTRAINT_VIOLATION;
 389         }
 390
 391         return LDAP_SUCCESS;
 392 }
 393
 394 void
 395 slap_mod_free(
 396         Modification    *mod,
 397         int                             freeit )
 398 {
 399         if ( mod->sm_values != NULL ) ber_bvarray_free( mod->sm_values );
 400         mod->sm_values = NULL;
 401
 402         if ( mod->sm_nvalues != NULL ) ber_bvarray_free( mod->sm_nvalues );
 403         mod->sm_nvalues = NULL;
 404
 405         if( freeit ) free( mod );
 406 }
 407
 408 void
 409 slap_mods_free(
 410     Modifications       *ml )
 411 {
 412         Modifications *next;
 413
 414         for ( ; ml != NULL; ml = next ) {
 415                 next = ml->sml_next;
 416
 417                 slap_mod_free( &ml->sml_mod, 0 );
 418                 free( ml );
 419         }
 420 }
 421