git.sur5r.net Git - openldap/blob - libraries/librewrite/map.c

   1 /******************************************************************************
   2  *
   3  * Copyright (C) 2000 Pierangelo Masarati, <ando@sys-net.it>
   4  * All rights reserved.
   5  *
   6  * Permission is granted to anyone to use this software for any purpose
   7  * on any computer system, and to alter it and redistribute it, subject
   8  * to the following restrictions:
   9  *
  10  * 1. The author is not responsible for the consequences of use of this
  11  * software, no matter how awful, even if they arise from flaws in it.
  12  *
  13  * 2. The origin of this software must not be misrepresented, either by
  14  * explicit claim or by omission.  Since few users ever read sources,
  15  * credits should appear in the documentation.
  16  *
  17  * 3. Altered versions must be plainly marked as such, and must not be
  18  * misrepresented as being the original software.  Since few users
  19  * ever read sources, credits should appear in the documentation.
  20  *
  21  * 4. This notice may not be removed or altered.
  22  *
  23  ******************************************************************************/
  24
  25 #include <portable.h>
  26
  27 #ifdef HAVE_PWD_H
  28 #include <pwd.h>
  29 #endif
  30
  31 #include "rewrite-int.h"
  32 #include "rewrite-map.h"
  33
  34 /*
  35  * Global data
  36  */
  37 #ifdef USE_REWRITE_LDAP_PVT_THREADS
  38 ldap_pvt_thread_mutex_t xpasswd_mutex;
  39 static int xpasswd_mutex_init = 0;
  40 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
  41
  42 /*
  43  * Map parsing
  44  * NOTE: these are old-fashion maps; new maps will be parsed on separate
  45  * config lines, and referred by name.
  46  */
  47 struct rewrite_map *
  48 rewrite_xmap_parse(
  49                 struct rewrite_info *info,
  50                 const char *s,
  51                 const char **currpos
  52 )
  53 {
  54         struct rewrite_map *map;
  55
  56         assert( info != NULL );
  57         assert( s != NULL );
  58         assert( currpos != NULL );
  59
  60         Debug( LDAP_DEBUG_ARGS, "rewrite_xmap_parse: %s\n%s%s",
  61                         s, "", "" );
  62
  63         *currpos = NULL;
  64
  65         map = calloc( sizeof( struct rewrite_map ), 1 );
  66         if ( map == NULL ) {
  67                 Debug( LDAP_DEBUG_ANY, "rewrite_xmap_parse:"
  68                                 " calloc failed\n%s%s%s", "", "", "" );
  69                 return NULL;
  70         }
  71
  72         /*
  73          * Experimental passwd map:
  74          * replaces the uid with the matching gecos from /etc/passwd file
  75          */
  76         if ( strncasecmp(s, "xpasswd", 7 ) == 0 ) {
  77                 map->lm_type = REWRITE_MAP_XPWDMAP;
  78                 map->lm_name = strdup( "xpasswd" );
  79
  80                 assert( s[7] == '}' );
  81                 *currpos = s + 8;
  82
  83 #ifdef USE_REWRITE_LDAP_PVT_THREADS
  84                 if ( !xpasswd_mutex_init ) {
  85                         xpasswd_mutex_init = 1;
  86                         if ( ldap_pvt_thread_mutex_init( &xpasswd_mutex ) ) {
  87                                 free( map );
  88                                 return NULL;
  89                         }
  90                 }
  91 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
  92
  93                 /* Don't really care if fails */
  94                 return map;
  95
  96         /*
  97          * Experimental file map:
  98          * looks up key in a `key value' ascii file
  99          */
 100         } else if ( strncasecmp(s, "xfile", 5 ) == 0 ) {
 101                 char *filename;
 102                 const char *p;
 103                 int l;
 104                 int c = 5;
 105
 106                 map->lm_type = REWRITE_MAP_XFILEMAP;
 107
 108                 if ( s[ c ] != '(' ) {
 109                         free( map );
 110                         return NULL;
 111                 }
 112
 113                 /* Must start with '/' for security concerns */
 114                 c++;
 115                 if ( s[ c ] != '/' ) {
 116                         free( map );
 117                         return NULL;
 118                 }
 119
 120                 for ( p = s + c; p[ 0 ] != '\0' && p[ 0 ] != ')'; p++ );
 121                 if ( p[ 0 ] != ')' ) {
 122                         free( map );
 123                         return NULL;
 124                 }
 125
 126                 l = p - s - c;
 127                 filename = calloc( sizeof( char ), l + 1 );
 128                 AC_MEMCPY( filename, s + c, l );
 129                 filename[ l ] = '\0';
 130
 131                 map->lm_args = ( void * )fopen( filename, "r" );
 132                 free( filename );
 133
 134                 if ( map->lm_args == NULL ) {
 135                         free( map );
 136                         return NULL;
 137                 }
 138
 139                 *currpos = p + 1;
 140
 141 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 142                 if ( ldap_pvt_thread_mutex_init( &map->lm_mutex ) ) {
 143                         fclose( ( FILE * )map->lm_args );
 144                         free( map );
 145                         return NULL;
 146                 }
 147 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 148
 149                 return map;
 150
 151         /*
 152          * Experimental ldap map:
 153          * looks up key on the fly (not implemented!)
 154          */
 155         } else if ( strncasecmp(s, "xldap", 5 ) == 0 ) {
 156                 char *p;
 157                 char *url;
 158                 int l, rc;
 159                 int c = 5;
 160                 LDAPURLDesc *lud;
 161
 162                 if ( s[ c ] != '(' ) {
 163                         free( map );
 164                         return NULL;
 165                 }
 166                 c++;
 167
 168                 p = strchr( s, '}' );
 169                 if ( p == NULL ) {
 170                         free( map );
 171                         return NULL;
 172                 }
 173                 p--;
 174
 175                 *currpos = p + 2;
 176
 177                 /*
 178                  * Add two bytes for urlencoding of '%s'
 179                  */
 180                 l = p - s - c;
 181                 url = calloc( sizeof( char ), l + 3 );
 182                 AC_MEMCPY( url, s + c, l );
 183                 url[ l ] = '\0';
 184
 185                 /*
 186                  * Urlencodes the '%s' for ldap_url_parse
 187                  */
 188                 p = strchr( url, '%' );
 189                 if ( p != NULL ) {
 190                         AC_MEMCPY( p + 3, p + 1, strlen( p + 1 ) + 1 );
 191                         p[ 1 ] = '2';
 192                         p[ 2 ] = '5';
 193                 }
 194
 195                 rc =  ldap_url_parse( url, &lud );
 196                 free( url );
 197
 198                 if ( rc != LDAP_SUCCESS ) {
 199                         free( map );
 200                         return NULL;
 201                 }
 202                 assert( lud != NULL );
 203
 204                 map->lm_args = ( void * )lud;
 205                 map->lm_type = REWRITE_MAP_XLDAPMAP;
 206
 207 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 208                 if ( ldap_pvt_thread_mutex_init( &map->lm_mutex ) ) {
 209                         ldap_free_urldesc( lud );
 210                         free( map );
 211                         return NULL;
 212                 }
 213 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 214
 215                 return map;
 216
 217         /* Unhandled map */
 218         }
 219
 220         return NULL;
 221 }
 222
 223 struct rewrite_map *
 224 rewrite_map_parse(
 225                 struct rewrite_info *info,
 226                 const char *string,
 227                 const char **currpos
 228 )
 229 {
 230         struct rewrite_map *map = NULL;
 231         struct rewrite_subst *subst = NULL;
 232         char *s, *begin = NULL, *end;
 233         const char *p;
 234         int l, cnt;
 235
 236         assert( info != NULL );
 237         assert( string != NULL );
 238         assert( currpos != NULL );
 239
 240         *currpos = NULL;
 241
 242         /*
 243          * Go to the end of the map invocation (the right closing brace)
 244          */
 245         for ( p = string, cnt = 1; p[ 0 ] != '\0' && cnt > 0; p++ ) {
 246                 if ( p[ 0 ] == REWRITE_SUBMATCH_ESCAPE ) {
 247                         /*
 248                          * '\' marks the beginning of a new map
 249                          */
 250                         if ( p[ 1 ] == '{' ) {
 251                                 cnt++;
 252                         /*
 253                          * '\' followed by a digit may mark the beginning
 254                          * of an old map
 255                          */
 256                         } else if ( isdigit( (unsigned char) p[ 1 ] ) && p[ 2 ] == '{' ) {
 257                                 cnt++;
 258                                 p++;
 259                         }
 260                         p++;
 261                 } else if ( p[ 0 ] == '}' ) {
 262                         cnt--;
 263                 }
 264         }
 265         if ( cnt != 0 ) {
 266                 return NULL;
 267         }
 268         *currpos = p;
 269
 270         /*
 271          * Copy the map invocation
 272          */
 273         l = p - string - 1;
 274         s = calloc( sizeof( char ), l + 1 );
 275         AC_MEMCPY( s, string, l );
 276         s[ l ] = 0;
 277
 278         /*
 279          * Isolate the map name (except for variable deref)
 280          */
 281         switch ( s[ 0 ] ) {
 282         case REWRITE_OPERATOR_VARIABLE_GET:
 283         case REWRITE_OPERATOR_PARAM_GET:
 284                 break;
 285         default:
 286                 begin = strchr( s, '(' );
 287                 if ( begin == NULL ) {
 288                         free( s );
 289                         return NULL;
 290                 }
 291                 begin[ 0 ] = '\0';
 292                 begin++;
 293                 break;
 294         }
 295
 296         /*
 297          * Check for special map types
 298          */
 299         p = s;
 300         switch ( p[ 0 ] ) {
 301         case REWRITE_OPERATOR_SUBCONTEXT:
 302         case REWRITE_OPERATOR_COMMAND:
 303         case REWRITE_OPERATOR_VARIABLE_SET:
 304         case REWRITE_OPERATOR_VARIABLE_GET:
 305         case REWRITE_OPERATOR_PARAM_GET:
 306                 p++;
 307                 break;
 308         }
 309
 310         /*
 311          * Variable set and get may be repeated to indicate session-wide
 312          * instead of operation-wide variables
 313          */
 314         switch ( p[ 0 ] ) {
 315         case REWRITE_OPERATOR_VARIABLE_SET:
 316         case REWRITE_OPERATOR_VARIABLE_GET:
 317                 p++;
 318                 break;
 319         }
 320
 321         /*
 322          * Variable get token can be appended to variable set to mean store
 323          * AND rewrite
 324          */
 325         if ( p[ 0 ] == REWRITE_OPERATOR_VARIABLE_GET ) {
 326                 p++;
 327         }
 328
 329         /*
 330          * Check the syntax of the variable name
 331          */
 332         if ( !isalpha( (unsigned char) p[ 0 ] ) ) {
 333                 free( s );
 334                 return NULL;
 335         }
 336         for ( p++; p[ 0 ] != '\0'; p++ ) {
 337                 if ( !isalnum( (unsigned char) p[ 0 ] ) ) {
 338                         free( s );
 339                         return NULL;
 340                 }
 341         }
 342
 343         /*
 344          * Isolate the argument of the map (except for variable deref)
 345          */
 346         switch ( s[ 0 ] ) {
 347         case REWRITE_OPERATOR_VARIABLE_GET:
 348         case REWRITE_OPERATOR_PARAM_GET:
 349                 break;
 350         default:
 351                 end = strrchr( begin, ')' );
 352                 if ( end == NULL ) {
 353                         free( s );
 354                         return NULL;
 355                 }
 356                 end[ 0 ] = '\0';
 357
 358                 /*
 359                  * Compile the substitution pattern of the map argument
 360                  */
 361                 subst = rewrite_subst_compile( info, begin );
 362                 if ( subst == NULL ) {
 363                         free( s );
 364                         return NULL;
 365                 }
 366                 break;
 367         }
 368
 369         /*
 370          * Create the map
 371          */
 372         map = calloc( sizeof( struct rewrite_map ), 1 );
 373         if ( map == NULL ) {
 374                 if ( subst != NULL ) {
 375                         free( subst );
 376                 }
 377                 free( s );
 378                 return NULL;
 379         }
 380
 381 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 382         if ( ldap_pvt_thread_mutex_init( &map->lm_mutex ) ) {
 383                 if ( subst != NULL ) {
 384                         free( subst );
 385                 }
 386                 free( s );
 387                 free( map );
 388                 return NULL;
 389         }
 390 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 391
 392         /*
 393          * No subst for variable deref
 394          */
 395         switch ( s[ 0 ] ) {
 396         case REWRITE_OPERATOR_VARIABLE_GET:
 397         case REWRITE_OPERATOR_PARAM_GET:
 398                 break;
 399         default:
 400                 map->lm_subst = subst;
 401                 break;
 402         }
 403
 404         /*
 405          * Parses special map types
 406          */
 407         switch ( s[ 0 ] ) {
 408
 409         /*
 410          * Subcontext
 411          */
 412         case REWRITE_OPERATOR_SUBCONTEXT:               /* '>' */
 413
 414                 /*
 415                  * Fetch the rewrite context
 416                  * it MUST have been defined previously
 417                  */
 418                 map->lm_type = REWRITE_MAP_SUBCONTEXT;
 419                 map->lm_name = strdup( s + 1 );
 420                 map->lm_data = rewrite_context_find( info, s + 1 );
 421                 if ( map->lm_data == NULL ) {
 422                         free( s );
 423                         free( map );
 424                         return NULL;
 425                 }
 426                 break;
 427
 428         /*
 429          * External command
 430          */
 431         case REWRITE_OPERATOR_COMMAND:          /* '|' */
 432                 free( map );
 433                 map = NULL;
 434                 break;
 435
 436         /*
 437          * Variable set
 438          */
 439         case REWRITE_OPERATOR_VARIABLE_SET:     /* '&' */
 440                 if ( s[ 1 ] == REWRITE_OPERATOR_VARIABLE_SET ) {
 441                         if ( s[ 2 ] == REWRITE_OPERATOR_VARIABLE_GET ) {
 442                                 map->lm_type = REWRITE_MAP_SETW_SESN_VAR;
 443                                 map->lm_name = strdup( s + 3 );
 444                         } else {
 445                                 map->lm_type = REWRITE_MAP_SET_SESN_VAR;
 446                                 map->lm_name = strdup( s + 2 );
 447                         }
 448                 } else {
 449                         if ( s[ 1 ] == REWRITE_OPERATOR_VARIABLE_GET ) {
 450                                 map->lm_type = REWRITE_MAP_SETW_OP_VAR;
 451                                 map->lm_name = strdup( s + 2 );
 452                         } else {
 453                                 map->lm_type = REWRITE_MAP_SET_OP_VAR;
 454                                 map->lm_name = strdup( s + 1 );
 455                         }
 456                 }
 457                 break;
 458
 459         /*
 460          * Variable dereference
 461          */
 462         case REWRITE_OPERATOR_VARIABLE_GET:     /* '*' */
 463                 if ( s[ 1 ] == REWRITE_OPERATOR_VARIABLE_GET ) {
 464                         map->lm_type = REWRITE_MAP_GET_SESN_VAR;
 465                         map->lm_name = strdup( s + 2 );
 466                 } else {
 467                         map->lm_type = REWRITE_MAP_GET_OP_VAR;
 468                         map->lm_name = strdup( s + 1 );
 469                 }
 470                 break;
 471
 472         /*
 473          * Parameter
 474          */
 475         case REWRITE_OPERATOR_PARAM_GET:                /* '$' */
 476                 map->lm_type = REWRITE_MAP_GET_PARAM;
 477                 map->lm_name = strdup( s + 1 );
 478                 break;
 479
 480         /*
 481          * Built-in map
 482          */
 483         default:
 484                 map->lm_type = REWRITE_MAP_BUILTIN;
 485                 map->lm_name = strdup( s );
 486                 map->lm_data = rewrite_builtin_map_find( info, s );
 487                 if ( map->lm_data == NULL ) {
 488                         return NULL;
 489                 }
 490                 break;
 491
 492         }
 493
 494         free( s );
 495         return map;
 496 }
 497
 498 /*
 499  * Map key -> value resolution
 500  * NOTE: these are old-fashion maps; new maps will be parsed on separate
 501  * config lines, and referred by name.
 502  */
 503 int
 504 rewrite_xmap_apply(
 505                 struct rewrite_info *info,
 506                 struct rewrite_op *op,
 507                 struct rewrite_map *map,
 508                 struct berval *key,
 509                 struct berval *val
 510 )
 511 {
 512         int rc = REWRITE_SUCCESS;
 513
 514         assert( info != NULL );
 515         assert( op != NULL );
 516         assert( map != NULL );
 517         assert( key != NULL );
 518         assert( val != NULL );
 519
 520         val->bv_val = NULL;
 521         val->bv_len = 0;
 522
 523         switch ( map->lm_type ) {
 524 #ifdef HAVE_GETPWNAM
 525         case REWRITE_MAP_XPWDMAP: {
 526                 struct passwd *pwd;
 527
 528 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 529                 ldap_pvt_thread_mutex_lock( &xpasswd_mutex );
 530 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 531
 532                 pwd = getpwnam( key->bv_val );
 533                 if ( pwd == NULL ) {
 534
 535 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 536                         ldap_pvt_thread_mutex_unlock( &xpasswd_mutex );
 537 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 538
 539                         rc = REWRITE_NO_SUCH_OBJECT;
 540                         break;
 541                 }
 542
 543                 if ( pwd->pw_gecos != NULL && pwd->pw_gecos[0] != '\0' ) {
 544                         int l = strlen( pwd->pw_gecos );
 545
 546                         val->bv_val = strdup( pwd->pw_gecos );
 547                         if ( val->bv_val == NULL ) {
 548
 549 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 550                                 ldap_pvt_thread_mutex_unlock( &xpasswd_mutex );
 551 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 552
 553                                 rc = REWRITE_ERR;
 554                                 break;
 555                         }
 556                         val->bv_len = l;
 557                 } else {
 558                         val->bv_val = strdup( key->bv_val );
 559                         val->bv_len = key->bv_len;
 560                 }
 561
 562 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 563                 ldap_pvt_thread_mutex_unlock( &xpasswd_mutex );
 564 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 565
 566                 break;
 567         }
 568 #endif /* HAVE_GETPWNAM*/
 569
 570         case REWRITE_MAP_XFILEMAP: {
 571                 char buf[1024];
 572
 573                 if ( map->lm_args == NULL ) {
 574                         rc = REWRITE_ERR;
 575                         break;
 576                 }
 577
 578 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 579                 ldap_pvt_thread_mutex_lock( &map->lm_mutex );
 580 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 581
 582                 rewind( ( FILE * )map->lm_args );
 583
 584                 while ( fgets( buf, sizeof( buf ), ( FILE * )map->lm_args ) ) {
 585                         char *p;
 586                         int blen;
 587
 588                         blen = strlen( buf );
 589                         if ( buf[ blen - 1 ] == '\n' ) {
 590                                 buf[ blen - 1 ] = '\0';
 591                         }
 592
 593                         p = strtok( buf, " " );
 594                         if ( p == NULL ) {
 595 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 596                                 ldap_pvt_thread_mutex_unlock( &map->lm_mutex );
 597 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 598                                 rc = REWRITE_ERR;
 599                                 goto rc_return;
 600                         }
 601                         if ( strcasecmp( p, key->bv_val ) == 0
 602                                         && ( p = strtok( NULL, "" ) ) ) {
 603                                 val->bv_val = strdup( p );
 604                                 if ( val->bv_val == NULL ) {
 605                                         return REWRITE_ERR;
 606                                 }
 607
 608                                 val->bv_len = strlen( p );
 609
 610 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 611                                 ldap_pvt_thread_mutex_unlock( &map->lm_mutex );
 612 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 613
 614                                 goto rc_return;
 615                         }
 616                 }
 617
 618 #ifdef USE_REWRITE_LDAP_PVT_THREADS
 619                 ldap_pvt_thread_mutex_unlock( &map->lm_mutex );
 620 #endif /* USE_REWRITE_LDAP_PVT_THREADS */
 621
 622                 rc = REWRITE_ERR;
 623
 624                 break;
 625         }
 626
 627         case REWRITE_MAP_XLDAPMAP: {
 628                 LDAP *ld;
 629                 char filter[ LDAP_FILT_MAXSIZ ];
 630                 LDAPMessage *res = NULL, *entry;
 631                 LDAPURLDesc *lud = ( LDAPURLDesc * )map->lm_args;
 632                 int attrsonly = 0;
 633                 char **values;
 634
 635                 assert( lud != NULL );
 636
 637                 /*
 638                  * No mutex because there is no write on the map data
 639                  */
 640
 641                 ld = ldap_init( lud->lud_host, lud->lud_port );
 642                 if ( ld == NULL ) {
 643                         rc = REWRITE_ERR;
 644                         goto rc_return;
 645                 }
 646
 647                 snprintf( filter, sizeof( filter ), lud->lud_filter,
 648                                 key->bv_val );
 649
 650                 if ( strcasecmp( lud->lud_attrs[ 0 ], "dn" ) == 0 ) {
 651                         attrsonly = 1;
 652                 }
 653                 rc = ldap_search_s( ld, lud->lud_dn, lud->lud_scope,
 654                                 filter, lud->lud_attrs, attrsonly, &res );
 655                 if ( rc != LDAP_SUCCESS ) {
 656                         ldap_unbind( ld );
 657                         rc = REWRITE_ERR;
 658                         goto rc_return;
 659                 }
 660
 661                 if ( ldap_count_entries( ld, res ) != 1 ) {
 662                         ldap_unbind( ld );
 663                         rc = REWRITE_ERR;
 664                         goto rc_return;
 665                 }
 666
 667                 entry = ldap_first_entry( ld, res );
 668                 if ( entry == NULL ) {
 669                         ldap_msgfree( res );
 670                         ldap_unbind( ld );
 671                         rc = REWRITE_ERR;
 672                         goto rc_return;
 673                 }
 674                 if ( attrsonly == 1 ) {
 675                         val->bv_val = ldap_get_dn( ld, entry );
 676                         if ( val->bv_val == NULL ) {
 677                                 ldap_msgfree( res );
 678                                 ldap_unbind( ld );
 679                                 rc = REWRITE_ERR;
 680                                 goto rc_return;
 681                         }
 682                 } else {
 683                         values = ldap_get_values( ld, entry,
 684                                         lud->lud_attrs[0] );
 685                         if ( values == NULL ) {
 686                                 ldap_msgfree( res );
 687                                 ldap_unbind( ld );
 688                                 rc = REWRITE_ERR;
 689                                 goto rc_return;
 690                         }
 691                         val->bv_val = strdup( values[ 0 ] );
 692                         ldap_value_free( values );
 693                 }
 694                 val->bv_len = strlen( val->bv_val );
 695
 696                 ldap_msgfree( res );
 697                 ldap_unbind( ld );
 698
 699                 rc = REWRITE_SUCCESS;
 700         }
 701         }
 702
 703 rc_return:;
 704         return rc;
 705 }
 706
 707 /*
 708  * Applies the new map type
 709  */
 710 int
 711 rewrite_map_apply(
 712                 struct rewrite_info *info,
 713                 struct rewrite_op *op,
 714                 struct rewrite_map *map,
 715                 struct berval *key,
 716                 struct berval *val
 717 )
 718 {
 719         int rc = REWRITE_SUCCESS;
 720
 721         assert( info != NULL );
 722         assert( op != NULL );
 723         assert( map != NULL );
 724         assert( key != NULL );
 725         assert( val != NULL );
 726
 727         val->bv_val = NULL;
 728         val->bv_len = 0;
 729
 730         switch ( map->lm_type ) {
 731         case REWRITE_MAP_SUBCONTEXT:
 732                 rc = rewrite_context_apply( info, op,
 733                                 ( struct rewrite_context * )map->lm_data,
 734                                 key->bv_val, &val->bv_val );
 735                 if ( val->bv_val != NULL ) {
 736                         val->bv_len = strlen( val->bv_val );
 737                 }
 738                 break;
 739
 740         case REWRITE_MAP_SET_OP_VAR:
 741         case REWRITE_MAP_SETW_OP_VAR:
 742                 rc = rewrite_var_set( &op->lo_vars, map->lm_name,
 743                                 key->bv_val, 1 )
 744                         ? REWRITE_SUCCESS : REWRITE_ERR;
 745                 if ( map->lm_type == REWRITE_MAP_SET_OP_VAR ) {
 746                         val->bv_val = strdup( "" );
 747                 } else {
 748                         val->bv_val = strdup( key->bv_val );
 749                         val->bv_len = key->bv_len;
 750                 }
 751                 break;
 752
 753         case REWRITE_MAP_GET_OP_VAR: {
 754                 struct rewrite_var *var;
 755
 756                 var = rewrite_var_find( op->lo_vars, map->lm_name );
 757                 if ( var == NULL ) {
 758                         rc = REWRITE_ERR;
 759                 } else {
 760                         val->bv_val = strdup( var->lv_value.bv_val );
 761                         val->bv_len = var->lv_value.bv_len;
 762                 }
 763                 break;
 764         }
 765
 766         case REWRITE_MAP_SET_SESN_VAR:
 767         case REWRITE_MAP_SETW_SESN_VAR:
 768                 if ( op->lo_cookie == NULL ) {
 769                         rc = REWRITE_ERR;
 770                         break;
 771                 }
 772                 rc = rewrite_session_var_set( info, op->lo_cookie,
 773                                 map->lm_name, key->bv_val );
 774                 if ( map->lm_type == REWRITE_MAP_SET_SESN_VAR ) {
 775                         val->bv_val = strdup( "" );
 776                 } else {
 777                         val->bv_val = strdup( key->bv_val );
 778                         val->bv_len = key->bv_len;
 779                 }
 780                 break;
 781
 782         case REWRITE_MAP_GET_SESN_VAR:
 783                 rc = rewrite_session_var_get( info, op->lo_cookie,
 784                                 map->lm_name, val );
 785                 break;
 786
 787         case REWRITE_MAP_GET_PARAM:
 788                 rc = rewrite_param_get( info, map->lm_name, val );
 789                 break;
 790
 791         case REWRITE_MAP_BUILTIN: {
 792                 struct rewrite_builtin_map *bmap = map->lm_data;
 793                 switch ( bmap->lb_type ) {
 794                 case REWRITE_BUILTIN_MAP_LDAP:
 795                         rc = map_ldap_apply( bmap, key->bv_val, val );
 796                         break;
 797                 default:
 798                         rc = REWRITE_ERR;
 799                         break;
 800                 }
 801                 break;
 802         }
 803
 804         default:
 805                 rc = REWRITE_ERR;
 806                 break;
 807         }
 808
 809         return rc;
 810 }
 811