git.sur5r.net Git - openldap/blob - servers/slapd/back-sql/util.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2005 The OpenLDAP Foundation.
   5  * Portions Copyright 1999 Dmitry Kovalev.
   6  * Portions Copyright 2002 Pierangelo Masarati.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by Dmitry Kovalev for inclusion
  19  * by OpenLDAP Software.  Additional significant contributors include
  20  * Pierangelo Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26 #include <sys/types.h>
  27 #include "ac/string.h"
  28 #include "ac/ctype.h"
  29 #include "ac/stdarg.h"
  30
  31 #include "slap.h"
  32 #include "proto-sql.h"
  33 #include "lutil.h"
  34
  35 #define BACKSQL_MAX(a,b) ((a)>(b)?(a):(b))
  36 #define BACKSQL_MIN(a,b) ((a)<(b)?(a):(b))
  37
  38 #define BACKSQL_STR_GROW 256
  39
  40 char backsql_def_oc_query[] =
  41         "SELECT id,name,keytbl,keycol,create_proc,delete_proc,expect_return "
  42         "FROM ldap_oc_mappings";
  43 char backsql_def_needs_select_oc_query[] =
  44         "SELECT id,name,keytbl,keycol,create_proc,create_keyval,delete_proc,"
  45         "expect_return FROM ldap_oc_mappings";
  46 char backsql_def_at_query[] =
  47         "SELECT name,sel_expr,from_tbls,join_where,add_proc,delete_proc,"
  48         "param_order,expect_return,sel_expr_u FROM ldap_attr_mappings "
  49         "WHERE oc_map_id=?";
  50 char backsql_def_delentry_stmt[] = "DELETE FROM ldap_entries WHERE id=?";
  51 char backsql_def_renentry_stmt[] =
  52         "UPDATE ldap_entries SET dn=?,parent=?,keyval=? WHERE id=?";
  53 char backsql_def_insentry_stmt[] =
  54         "INSERT INTO ldap_entries (dn,oc_map_id,parent,keyval) "
  55         "VALUES (?,?,?,?)";
  56 char backsql_def_delobjclasses_stmt[] = "DELETE FROM ldap_entry_objclasses "
  57         "WHERE entry_id=?";
  58 char backsql_def_subtree_cond[] = "ldap_entries.dn LIKE CONCAT('%',?)";
  59 char backsql_def_upper_subtree_cond[] = "(ldap_entries.dn) LIKE CONCAT('%',?)";
  60 char backsql_id_query[] = "SELECT id,keyval,oc_map_id,dn FROM ldap_entries WHERE ";
  61 /* better ?||? or cast(?||? as varchar) */
  62 char backsql_def_concat_func[] = "CONCAT(?,?)";
  63
  64 /* TimesTen */
  65 char backsql_check_dn_ru_query[] = "SELECT dn_ru FROM ldap_entries";
  66
  67 struct berbuf *
  68 backsql_strcat( struct berbuf *dest, ... )
  69 {
  70         va_list         strs;
  71         ber_len_t       cdlen, cslen, grow;
  72         char            *cstr;
  73
  74         assert( dest );
  75         assert( dest->bb_val.bv_val == NULL
  76                         || dest->bb_val.bv_len == strlen( dest->bb_val.bv_val ) );
  77
  78 #ifdef BACKSQL_TRACE
  79         Debug( LDAP_DEBUG_TRACE, "==>backsql_strcat()\n", 0, 0, 0 );
  80 #endif /* BACKSQL_TRACE */
  81
  82         va_start( strs, dest );
  83         if ( dest->bb_val.bv_val == NULL || dest->bb_len == 0 ) {
  84                 dest->bb_val.bv_val = (char *)ch_calloc( BACKSQL_STR_GROW,
  85                                 sizeof( char ) );
  86                 dest->bb_val.bv_len = 0;
  87                 dest->bb_len = BACKSQL_STR_GROW;
  88         }
  89         cdlen = dest->bb_val.bv_len;
  90         while ( ( cstr = va_arg( strs, char * ) ) != NULL ) {
  91                 cslen = strlen( cstr );
  92                 grow = BACKSQL_MAX( BACKSQL_STR_GROW, cslen );
  93                 if ( dest->bb_len - cdlen <= cslen ) {
  94                         char    *tmp_dest;
  95
  96 #ifdef BACKSQL_TRACE
  97                         Debug( LDAP_DEBUG_TRACE, "backsql_strcat(): "
  98                                 "buflen=%d, cdlen=%d, cslen=%d "
  99                                 "-- reallocating dest\n",
 100                                 dest->bb_len, cdlen + 1, cslen );
 101 #endif /* BACKSQL_TRACE */
 102
 103                         tmp_dest = (char *)ch_realloc( dest->bb_val.bv_val,
 104                                         ( dest->bb_len ) + grow * sizeof( char ) );
 105                         if ( tmp_dest == NULL ) {
 106                                 Debug( LDAP_DEBUG_ANY, "backsql_strcat(): "
 107                                         "could not reallocate string buffer.\n",
 108                                         0, 0, 0 );
 109                                 return NULL;
 110                         }
 111                         dest->bb_val.bv_val = tmp_dest;
 112                         dest->bb_len += grow;
 113
 114 #ifdef BACKSQL_TRACE
 115                         Debug( LDAP_DEBUG_TRACE, "backsql_strcat(): "
 116                                 "new buflen=%d, dest=%p\n",
 117                                 dest->bb_len, dest, 0 );
 118 #endif /* BACKSQL_TRACE */
 119                 }
 120                 AC_MEMCPY( dest->bb_val.bv_val + cdlen, cstr, cslen + 1 );
 121                 cdlen += cslen;
 122         }
 123         va_end( strs );
 124
 125 #ifdef BACKSQL_TRACE
 126         Debug( LDAP_DEBUG_TRACE, "<==backsql_strcat() (dest=\"%s\")\n",
 127                         dest->bb_val.bv_val, 0, 0 );
 128 #endif /* BACKSQL_TRACE */
 129
 130         dest->bb_val.bv_len = cdlen;
 131
 132         return dest;
 133 }
 134
 135 struct berbuf *
 136 backsql_strfcat( struct berbuf *dest, const char *fmt, ... )
 137 {
 138         va_list         strs;
 139         ber_len_t       cdlen;
 140
 141         assert( dest );
 142         assert( fmt );
 143         assert( dest->bb_len == 0 || dest->bb_len > dest->bb_val.bv_len );
 144         assert( dest->bb_val.bv_val == NULL
 145                         || dest->bb_val.bv_len == strlen( dest->bb_val.bv_val ) );
 146
 147 #ifdef BACKSQL_TRACE
 148         Debug( LDAP_DEBUG_TRACE, "==>backsql_strfcat()\n", 0, 0, 0 );
 149 #endif /* BACKSQL_TRACE */
 150
 151         va_start( strs, fmt );
 152         if ( dest->bb_val.bv_val == NULL || dest->bb_len == 0 ) {
 153                 dest->bb_val.bv_val = (char *)ch_calloc( BACKSQL_STR_GROW,
 154                                 sizeof( char ) );
 155                 dest->bb_val.bv_len = 0;
 156                 dest->bb_len = BACKSQL_STR_GROW;
 157         }
 158
 159         cdlen = dest->bb_val.bv_len;
 160         for ( ; fmt[0]; fmt++ ) {
 161                 ber_len_t       cslen, grow;
 162                 char            *cstr, cc[ 2 ] = { '\0', '\0' };
 163                 struct berval   *cbv;
 164
 165                 switch ( fmt[ 0 ] ) {
 166
 167                 /* berval */
 168                 case 'b':
 169                         cbv = va_arg( strs, struct berval * );
 170                         cstr = cbv->bv_val;
 171                         cslen = cbv->bv_len;
 172                         break;
 173
 174                 /* length + string */
 175                 case 'l':
 176                         cslen = va_arg( strs, ber_len_t );
 177                         cstr = va_arg( strs, char * );
 178                         break;
 179
 180                 /* string */
 181                 case 's':
 182                         cstr = va_arg( strs, char * );
 183                         cslen = strlen( cstr );
 184                         break;
 185
 186                 /* char */
 187                 case 'c':
 188                         /*
 189                          * `char' is promoted to `int' when passed through `...'
 190                          */
 191                         cc[0] = va_arg( strs, int );
 192                         cstr = cc;
 193                         cslen = 1;
 194                         break;
 195
 196                 default:
 197                         assert( 0 );
 198                 }
 199
 200                 grow = BACKSQL_MAX( BACKSQL_STR_GROW, cslen );
 201                 if ( dest->bb_len - cdlen <= cslen ) {
 202                         char    *tmp_dest;
 203
 204 #ifdef BACKSQL_TRACE
 205                         Debug( LDAP_DEBUG_TRACE, "backsql_strfcat(): "
 206                                 "buflen=%d, cdlen=%d, cslen=%d "
 207                                 "-- reallocating dest\n",
 208                                 dest->bb_len, cdlen + 1, cslen );
 209 #endif /* BACKSQL_TRACE */
 210
 211                         tmp_dest = (char *)ch_realloc( dest->bb_val.bv_val,
 212                                         ( dest->bb_len ) + grow * sizeof( char ) );
 213                         if ( tmp_dest == NULL ) {
 214                                 Debug( LDAP_DEBUG_ANY, "backsql_strfcat(): "
 215                                         "could not reallocate string buffer.\n",
 216                                         0, 0, 0 );
 217                                 return NULL;
 218                         }
 219                         dest->bb_val.bv_val = tmp_dest;
 220                         dest->bb_len += grow * sizeof( char );
 221
 222 #ifdef BACKSQL_TRACE
 223                         Debug( LDAP_DEBUG_TRACE, "backsql_strfcat(): "
 224                                 "new buflen=%d, dest=%p\n", dest->bb_len, dest, 0 );
 225 #endif /* BACKSQL_TRACE */
 226                 }
 227
 228                 assert( cstr );
 229
 230                 AC_MEMCPY( dest->bb_val.bv_val + cdlen, cstr, cslen + 1 );
 231                 cdlen += cslen;
 232         }
 233
 234         va_end( strs );
 235
 236 #ifdef BACKSQL_TRACE
 237         Debug( LDAP_DEBUG_TRACE, "<==backsql_strfcat() (dest=\"%s\")\n",
 238                         dest->bb_val.bv_val, 0, 0 );
 239 #endif /* BACKSQL_TRACE */
 240
 241         dest->bb_val.bv_len = cdlen;
 242
 243         return dest;
 244 }
 245
 246 int
 247 backsql_entry_addattr(
 248         Entry                   *e,
 249         AttributeDescription    *ad,
 250         struct berval           *val,
 251         void                    *memctx )
 252 {
 253         int                     rc;
 254
 255 #ifdef BACKSQL_TRACE
 256         Debug( LDAP_DEBUG_TRACE, "backsql_entry_addattr(\"%s\"): %s=%s\n",
 257                 e->e_name.bv_val, ad->ad_cname->bv_val, val->bv_val );
 258 #endif /* BACKSQL_TRACE */
 259
 260         rc = attr_merge_normalize_one( e, ad, val, memctx );
 261
 262         if ( rc != LDAP_SUCCESS ) {
 263                 Debug( LDAP_DEBUG_TRACE, "backsql_entry_addattr(\"%s\"): "
 264                         "failed to merge value \"%s\" for attribute \"%s\"\n",
 265                         e->e_name.bv_val, val->bv_val, ad->ad_cname.bv_val );
 266                 return rc;
 267         }
 268
 269 #ifdef BACKSQL_TRACE
 270         Debug( LDAP_DEBUG_TRACE, "<==backsql_entry_addattr(\"%s\")\n",
 271                 e->e_name.bv_val, 0, 0 );
 272 #endif /* BACKSQL_TRACE */
 273
 274         return LDAP_SUCCESS;
 275 }
 276
 277 static char *
 278 backsql_get_table_spec( char **p )
 279 {
 280         char            *s, *q;
 281         struct berbuf   res = BB_NULL;
 282
 283         assert( p );
 284         assert( *p );
 285
 286         s = *p;
 287         while ( **p && **p != ',' ) {
 288                 (*p)++;
 289         }
 290
 291         if ( **p ) {
 292                 *(*p)++ = '\0';
 293         }
 294
 295 #define BACKSQL_NEXT_WORD { \
 296                 while ( *s && isspace( (unsigned char)*s ) ) s++; \
 297                 if ( !*s ) return res.bb_val.bv_val; \
 298                 q = s; \
 299                 while ( *q && !isspace( (unsigned char)*q ) ) q++; \
 300                 if ( *q ) *q++='\0'; \
 301         }
 302
 303         BACKSQL_NEXT_WORD;
 304         /* table name */
 305         backsql_strcat( &res, s, NULL );
 306         s = q;
 307
 308         BACKSQL_NEXT_WORD;
 309         if ( strcasecmp( s, "AS" ) == 0 ) {
 310                 s = q;
 311                 BACKSQL_NEXT_WORD;
 312         }
 313
 314         /* oracle doesn't understand "AS" :( and other RDBMSes don't need it */
 315 #ifdef BACKSQL_ALIASING_QUOTE
 316         backsql_strfcat( &res, "scsc", " " BACKSQL_ALIASING,
 317                         BACKSQL_ALIASING_QUOTE, s, BACKSQL_ALIASING_QUOTE );
 318 #else /* ! BACKSQL_ALIASING */
 319         backsql_strcat( &res, " " BACKSQL_ALIASING, s, NULL );
 320 #endif /* ! BACKSQL_ALIASING */
 321
 322         return res.bb_val.bv_val;
 323 }
 324
 325 int
 326 backsql_merge_from_clause(
 327         struct berbuf   *dest_from,
 328         struct berval   *src_from )
 329 {
 330         char            *s, *p, *srcc, *pos, e;
 331         struct berbuf   res = BB_NULL;
 332
 333 #ifdef BACKSQL_TRACE
 334         Debug( LDAP_DEBUG_TRACE, "==>backsql_merge_from_clause(): "
 335                 "dest_from=\"%s\",src_from=\"%s\"\n",
 336                 dest_from ? dest_from->bb_val.bv_val : "<NULL>",
 337                 src_from->bv_val, 0 );
 338 #endif /* BACKSQL_TRACE */
 339
 340         srcc = ch_strdup( src_from->bv_val );
 341         p = srcc;
 342
 343         if ( dest_from != NULL ) {
 344                 res = *dest_from;
 345         }
 346
 347         while ( *p ) {
 348                 s = backsql_get_table_spec( &p );
 349
 350 #ifdef BACKSQL_TRACE
 351                 Debug( LDAP_DEBUG_TRACE, "backsql_merge_from_clause(): "
 352                         "p=\"%s\" s=\"%s\"\n", p, s, 0 );
 353 #endif /* BACKSQL_TRACE */
 354
 355                 if ( res.bb_val.bv_val == NULL ) {
 356                         backsql_strcat( &res, s, NULL );
 357
 358                 } else {
 359                         pos = strstr( res.bb_val.bv_val, s );
 360                         if ( pos == NULL || ( ( e = pos[ strlen( s ) ] ) != '\0' && e != ',' ) ) {
 361                                 backsql_strfcat( &res, "cs", ',', s );
 362                         }
 363                 }
 364
 365                 if ( s ) {
 366                         ch_free( s );
 367                 }
 368         }
 369
 370 #ifdef BACKSQL_TRACE
 371         Debug( LDAP_DEBUG_TRACE, "<==backsql_merge_from_clause()\n", 0, 0, 0 );
 372 #endif /* BACKSQL_TRACE */
 373
 374         free( srcc );
 375         *dest_from = res;
 376
 377         return 1;
 378 }
 379
 380 /*
 381  * splits a pattern in components separated by '?'
 382  * (double ?? are turned into single ? and left in the string)
 383  * expected contains the number of expected occurrences of '?'
 384  * (a negative value means parse as many as possible)
 385  */
 386
 387 int
 388 backsql_split_pattern(
 389         const char      *_pattern,
 390         BerVarray       *split_pattern,
 391         int             expected )
 392 {
 393         char            *pattern, *start, *end;
 394         struct berval   bv;
 395         int             rc = 0;
 396
 397 #define SPLIT_CHAR      '?'
 398
 399         assert( _pattern );
 400         assert( split_pattern );
 401
 402         pattern = ch_strdup( _pattern );
 403
 404         start = pattern;
 405         end = strchr( start, SPLIT_CHAR );
 406         for ( ; start; expected-- ) {
 407                 char            *real_end = end;
 408                 ber_len_t       real_len;
 409
 410                 if ( real_end == NULL ) {
 411                         real_end = start + strlen( start );
 412
 413                 } else if ( real_end[ 1 ] == SPLIT_CHAR ) {
 414                         expected++;
 415                         AC_MEMCPY( real_end, real_end + 1, strlen( real_end ) );
 416                         end = strchr( real_end + 1, SPLIT_CHAR );
 417                         continue;
 418                 }
 419
 420                 real_len = real_end - start;
 421                 if ( real_len == 0 ) {
 422                         ber_str2bv( "", 0, 1, &bv );
 423                 } else {
 424                         ber_str2bv( start, real_len, 1, &bv );
 425                 }
 426
 427                 ber_bvarray_add( split_pattern, &bv );
 428
 429                 if ( expected == 0 ) {
 430                         if ( end != NULL ) {
 431                                 rc = -1;
 432                                 goto done;
 433                         }
 434                         break;
 435                 }
 436
 437                 if ( end != NULL ) {
 438                         start = end + 1;
 439                         end = strchr( start, SPLIT_CHAR );
 440                 }
 441         }
 442
 443 done:;
 444
 445         ch_free( pattern );
 446
 447         return rc;
 448 }
 449
 450 int
 451 backsql_prepare_pattern(
 452         BerVarray       split_pattern,
 453         BerVarray       values,
 454         struct berval   *res )
 455 {
 456         int             i;
 457         struct berbuf   bb = BB_NULL;
 458
 459         assert( res );
 460
 461         for ( i = 0; values[i].bv_val; i++ ) {
 462                 if ( split_pattern[i].bv_val == NULL ) {
 463                         ch_free( bb.bb_val.bv_val );
 464                         return -1;
 465                 }
 466                 backsql_strfcat( &bb, "b", &split_pattern[ i ] );
 467                 backsql_strfcat( &bb, "b", &values[ i ] );
 468         }
 469
 470         if ( split_pattern[ i ].bv_val == NULL ) {
 471                 ch_free( bb.bb_val.bv_val );
 472                 return -1;
 473         }
 474
 475         backsql_strfcat( &bb, "b", &split_pattern[ i ] );
 476
 477         *res = bb.bb_val;
 478
 479         return 0;
 480 }
 481
 482 int
 483 backsql_entryUUID(
 484         backsql_info    *bi,
 485         backsql_entryID *id,
 486         struct berval   *entryUUID,
 487         void            *memctx )
 488 {
 489         char            uuidbuf[ LDAP_LUTIL_UUIDSTR_BUFSIZE ];
 490         struct berval   uuid;
 491 #ifdef BACKSQL_ARBITRARY_KEY
 492         int             i;
 493         ber_len_t       l, lmax;
 494 #endif /* BACKSQL_ARBITRARY_KEY */
 495
 496         /* entryUUID is generated as "%08x-%04x-%04x-0000-eaddrXXX"
 497          * with eid_oc_id as %08x and hi and lo eid_id as %04x-%04x */
 498         assert( bi );
 499         assert( id );
 500         assert( entryUUID );
 501
 502 #ifdef BACKSQL_ARBITRARY_KEY
 503         snprintf( uuidbuf, sizeof( uuidbuf ),
 504                         "%08x-0000-0000-0000-000000000000",
 505                         ( id->eid_oc_id & 0xFFFFFFFF ) );
 506         lmax = id->eid_keyval.bv_len < 12 ? id->eid_keyval.bv_len : 12;
 507         for ( l = 0, i = 9; l < lmax; l++, i += 2 ) {
 508                 switch ( i ) {
 509                 case STRLENOF( "00000000-0000" ):
 510                 case STRLENOF( "00000000-0000-0000" ):
 511                 case STRLENOF( "00000000-0000-0000-0000" ):
 512                         uuidbuf[ i++ ] = '-';
 513                 /* FALLTHRU */
 514
 515                 default:
 516                         snprintf( &uuidbuf[ i ], 3, "%2x", id->eid_keyval.bv_val[ l ] );
 517                         break;
 518                 }
 519         }
 520 #else /* ! BACKSQL_ARBITRARY_KEY */
 521         /* note: works only with 32 bit architectures... */
 522         snprintf( uuidbuf, sizeof( uuidbuf ),
 523                         "%08x-%04x-%04x-0000-000000000000",
 524                         ( id->eid_oc_id & 0xFFFFFFFF ),
 525                         ( ( id->eid_keyval & 0xFFFF0000 ) >> 020 /* 16 */ ),
 526                         ( id->eid_keyval & 0xFFFF ) );
 527 #endif /* ! BACKSQL_ARBITRARY_KEY */
 528
 529         uuid.bv_val = uuidbuf;
 530         uuid.bv_len = strlen( uuidbuf );
 531
 532         ber_dupbv_x( entryUUID, &uuid, memctx );
 533
 534         return 0;
 535 }
 536
 537 int
 538 backsql_entryUUID_decode(
 539         struct berval   *entryUUID,
 540         unsigned long   *oc_id,
 541 #ifdef BACKSQL_ARBITRARY_KEY
 542         struct berval   *keyval
 543 #else /* ! BACKSQL_ARBITRARY_KEY */
 544         unsigned long   *keyval
 545 #endif /* ! BACKSQL_ARBITRARY_KEY */
 546         )
 547 {
 548         fprintf( stderr, "==> backsql_entryUUID_decode()\n" );
 549
 550         *oc_id = ( entryUUID->bv_val[0] << 030 /* 24 */ )
 551                 + ( entryUUID->bv_val[1] << 020 /* 16 */ )
 552                 + ( entryUUID->bv_val[2] << 010 /* 8 */ )
 553                 + entryUUID->bv_val[3];
 554
 555 #ifdef BACKSQL_ARBITRARY_KEY
 556         /* FIXME */
 557 #else /* ! BACKSQL_ARBITRARY_KEY */
 558         *keyval = ( entryUUID->bv_val[4] << 030 /* 24 */ )
 559                 + ( entryUUID->bv_val[5] << 020 /* 16 */ )
 560                 + ( entryUUID->bv_val[6] << 010 /* 8 */ )
 561                 + entryUUID->bv_val[7];
 562 #endif /* ! BACKSQL_ARBITRARY_KEY */
 563
 564         fprintf( stderr, "<== backsql_entryUUID_decode(): oc=%lu id=%lu\n",
 565                         *oc_id, *keyval );
 566
 567         return LDAP_SUCCESS;
 568 }
 569