]> git.sur5r.net Git - openldap/blob - servers/slapd/back-sql/util.c
Merge remote-tracking branch 'origin/mdb.master' into OPENLDAP_REL_ENG_2_5
[openldap] / servers / slapd / back-sql / util.c
1 /* $OpenLDAP$ */
2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
3  *
4  * Copyright 1999-2014 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 const char backsql_def_oc_query[] = 
41         "SELECT id,name,keytbl,keycol,create_proc,delete_proc,expect_return "
42         "FROM ldap_oc_mappings";
43 const 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 const 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 const char backsql_def_delentry_stmt[] = "DELETE FROM ldap_entries WHERE id=?";
51 const char backsql_def_renentry_stmt[] =
52         "UPDATE ldap_entries SET dn=?,parent=?,keyval=? WHERE id=?";
53 const char backsql_def_insentry_stmt[] = 
54         "INSERT INTO ldap_entries (dn,oc_map_id,parent,keyval) "
55         "VALUES (?,?,?,?)";
56 const char backsql_def_delobjclasses_stmt[] = "DELETE FROM ldap_entry_objclasses "
57         "WHERE entry_id=?";
58 const char backsql_def_subtree_cond[] = "ldap_entries.dn LIKE CONCAT('%',?)";
59 const char backsql_def_upper_subtree_cond[] = "(ldap_entries.dn) LIKE CONCAT('%',?)";
60 const char backsql_id_query[] = "SELECT id,keyval,oc_map_id,dn FROM ldap_entries WHERE ";
61 /* better ?||? or cast(?||? as varchar) */ 
62 const char backsql_def_concat_func[] = "CONCAT(?,?)";
63
64 /* TimesTen */
65 const char backsql_check_dn_ru_query[] = "SELECT dn_ru FROM ldap_entries";
66
67 struct berbuf *
68 backsql_strcat_x( struct berbuf *dest, void *memctx, ... )
69 {
70         va_list         strs;
71         ber_len_t       cdlen, cslen, grow;
72         char            *cstr;
73
74         assert( dest != NULL );
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, memctx );
83         if ( dest->bb_val.bv_val == NULL || dest->bb_len == 0 ) {
84                 dest->bb_val.bv_val = (char *)ber_memalloc_x( BACKSQL_STR_GROW * sizeof( char ), memctx );
85                 dest->bb_val.bv_len = 0;
86                 dest->bb_len = BACKSQL_STR_GROW;
87         }
88         cdlen = dest->bb_val.bv_len;
89         while ( ( cstr = va_arg( strs, char * ) ) != NULL ) {
90                 cslen = strlen( cstr );
91                 grow = BACKSQL_MAX( BACKSQL_STR_GROW, cslen );
92                 if ( dest->bb_len - cdlen <= cslen ) {
93                         char    *tmp_dest;
94
95 #ifdef BACKSQL_TRACE
96                         Debug( LDAP_DEBUG_TRACE, "backsql_strcat(): "
97                                 "buflen=%d, cdlen=%d, cslen=%d "
98                                 "-- reallocating dest\n",
99                                 dest->bb_len, cdlen + 1, cslen );
100 #endif /* BACKSQL_TRACE */
101
102                         tmp_dest = (char *)ber_memrealloc_x( dest->bb_val.bv_val,
103                                         dest->bb_len + grow * sizeof( char ), memctx );
104                         if ( tmp_dest == NULL ) {
105                                 Debug( LDAP_DEBUG_ANY, "backsql_strcat(): "
106                                         "could not reallocate string buffer.\n",
107                                         0, 0, 0 );
108                                 return NULL;
109                         }
110                         dest->bb_val.bv_val = tmp_dest;
111                         dest->bb_len += grow;
112
113 #ifdef BACKSQL_TRACE
114                         Debug( LDAP_DEBUG_TRACE, "backsql_strcat(): "
115                                 "new buflen=%d, dest=%p\n",
116                                 dest->bb_len, dest, 0 );
117 #endif /* BACKSQL_TRACE */
118                 }
119                 AC_MEMCPY( dest->bb_val.bv_val + cdlen, cstr, cslen + 1 );
120                 cdlen += cslen;
121         }
122         va_end( strs );
123
124 #ifdef BACKSQL_TRACE
125         Debug( LDAP_DEBUG_TRACE, "<==backsql_strcat() (dest=\"%s\")\n", 
126                         dest->bb_val.bv_val, 0, 0 );
127 #endif /* BACKSQL_TRACE */
128
129         dest->bb_val.bv_len = cdlen;
130
131         return dest;
132
133
134 struct berbuf *
135 backsql_strfcat_x( struct berbuf *dest, void *memctx, const char *fmt, ... )
136 {
137         va_list         strs;
138         ber_len_t       cdlen;
139
140         assert( dest != NULL );
141         assert( fmt != NULL );
142         assert( dest->bb_len == 0 || dest->bb_len > dest->bb_val.bv_len );
143         assert( dest->bb_val.bv_val == NULL 
144                         || dest->bb_val.bv_len == strlen( dest->bb_val.bv_val ) );
145  
146 #ifdef BACKSQL_TRACE
147         Debug( LDAP_DEBUG_TRACE, "==>backsql_strfcat()\n", 0, 0, 0 );
148 #endif /* BACKSQL_TRACE */
149
150         va_start( strs, fmt );
151         if ( dest->bb_val.bv_val == NULL || dest->bb_len == 0 ) {
152                 dest->bb_val.bv_val = (char *)ber_memalloc_x( BACKSQL_STR_GROW * sizeof( char ), memctx );
153                 dest->bb_val.bv_len = 0;
154                 dest->bb_len = BACKSQL_STR_GROW;
155         }
156
157         cdlen = dest->bb_val.bv_len;
158         for ( ; fmt[0]; fmt++ ) {
159                 ber_len_t       cslen, grow;
160                 char            *cstr, cc[ 2 ] = { '\0', '\0' };
161                 struct berval   *cbv;
162
163                 switch ( fmt[ 0 ] ) {
164
165                 /* berval */
166                 case 'b':
167                         cbv = va_arg( strs, struct berval * );
168                         cstr = cbv->bv_val;
169                         cslen = cbv->bv_len;
170                         break;
171
172                 /* length + string */
173                 case 'l':
174                         cslen = va_arg( strs, ber_len_t );
175                         cstr = va_arg( strs, char * );
176                         break;
177
178                 /* string */
179                 case 's':
180                         cstr = va_arg( strs, char * );
181                         cslen = strlen( cstr );
182                         break;
183
184                 /* char */
185                 case 'c':
186                         /* 
187                          * `char' is promoted to `int' when passed through `...'
188                          */
189                         cc[0] = va_arg( strs, int );
190                         cstr = cc;
191                         cslen = 1;
192                         break;
193
194                 default:
195                         assert( 0 );
196                 }
197
198                 grow = BACKSQL_MAX( BACKSQL_STR_GROW, cslen );
199                 if ( dest->bb_len - cdlen <= cslen ) {
200                         char    *tmp_dest;
201
202 #ifdef BACKSQL_TRACE
203                         Debug( LDAP_DEBUG_TRACE, "backsql_strfcat(): "
204                                 "buflen=%d, cdlen=%d, cslen=%d "
205                                 "-- reallocating dest\n",
206                                 dest->bb_len, cdlen + 1, cslen );
207 #endif /* BACKSQL_TRACE */
208
209                         tmp_dest = (char *)ber_memrealloc_x( dest->bb_val.bv_val,
210                                         ( dest->bb_len ) + grow * sizeof( char ), memctx );
211                         if ( tmp_dest == NULL ) {
212                                 Debug( LDAP_DEBUG_ANY, "backsql_strfcat(): "
213                                         "could not reallocate string buffer.\n",
214                                         0, 0, 0 );
215                                 return NULL;
216                         }
217                         dest->bb_val.bv_val = tmp_dest;
218                         dest->bb_len += grow * sizeof( char );
219
220 #ifdef BACKSQL_TRACE
221                         Debug( LDAP_DEBUG_TRACE, "backsql_strfcat(): "
222                                 "new buflen=%d, dest=%p\n", dest->bb_len, dest, 0 );
223 #endif /* BACKSQL_TRACE */
224                 }
225
226                 assert( cstr != NULL );
227                 
228                 AC_MEMCPY( dest->bb_val.bv_val + cdlen, cstr, cslen + 1 );
229                 cdlen += cslen;
230         }
231
232         va_end( strs );
233
234 #ifdef BACKSQL_TRACE
235         Debug( LDAP_DEBUG_TRACE, "<==backsql_strfcat() (dest=\"%s\")\n", 
236                         dest->bb_val.bv_val, 0, 0 );
237 #endif /* BACKSQL_TRACE */
238
239         dest->bb_val.bv_len = cdlen;
240
241         return dest;
242
243
244 int
245 backsql_entry_addattr(
246         Entry                   *e,
247         AttributeDescription    *ad,
248         struct berval           *val,
249         void                    *memctx )
250 {
251         int                     rc;
252
253 #ifdef BACKSQL_TRACE
254         Debug( LDAP_DEBUG_TRACE, "backsql_entry_addattr(\"%s\"): %s=%s\n", 
255                 e->e_name.bv_val, ad->ad_cname.bv_val, val->bv_val );
256 #endif /* BACKSQL_TRACE */
257
258         rc = attr_merge_normalize_one( e, ad, val, memctx );
259
260         if ( rc != LDAP_SUCCESS ) {
261                 Debug( LDAP_DEBUG_TRACE, "backsql_entry_addattr(\"%s\"): "
262                         "failed to merge value \"%s\" for attribute \"%s\"\n",
263                         e->e_name.bv_val, val->bv_val, ad->ad_cname.bv_val );
264                 return rc;
265         }
266
267 #ifdef BACKSQL_TRACE
268         Debug( LDAP_DEBUG_TRACE, "<==backsql_entry_addattr(\"%s\")\n",
269                 e->e_name.bv_val, 0, 0 );
270 #endif /* BACKSQL_TRACE */
271
272         return LDAP_SUCCESS;
273 }
274
275 static char *
276 backsql_get_table_spec( backsql_info *bi, char **p )
277 {
278         char            *s, *q;
279         struct berbuf   res = BB_NULL;
280
281         assert( p != NULL );
282         assert( *p != NULL );
283
284         s = *p;
285         while ( **p && **p != ',' ) {
286                 (*p)++;
287         }
288
289         if ( **p ) {
290                 *(*p)++ = '\0';
291         }
292         
293 #define BACKSQL_NEXT_WORD { \
294                 while ( *s && isspace( (unsigned char)*s ) ) s++; \
295                 if ( !*s ) return res.bb_val.bv_val; \
296                 q = s; \
297                 while ( *q && !isspace( (unsigned char)*q ) ) q++; \
298                 if ( *q ) *q++='\0'; \
299         }
300
301         BACKSQL_NEXT_WORD;
302         /* table name */
303         backsql_strcat_x( &res, NULL, s, NULL );
304         s = q;
305
306         BACKSQL_NEXT_WORD;
307         if ( strcasecmp( s, "AS" ) == 0 ) {
308                 s = q;
309                 BACKSQL_NEXT_WORD;
310         }
311
312         /* oracle doesn't understand "AS" :( and other RDBMSes don't need it */
313         backsql_strfcat_x( &res, NULL, "lbbsb",
314                         STRLENOF( " " ), " ",
315                         &bi->sql_aliasing,
316                         &bi->sql_aliasing_quote,
317                         s,
318                         &bi->sql_aliasing_quote );
319
320         return res.bb_val.bv_val;
321 }
322
323 int
324 backsql_merge_from_clause( 
325         backsql_info    *bi,
326         struct berbuf   *dest_from,
327         struct berval   *src_from )
328 {
329         char            *s, *p, *srcc, *pos, e;
330         struct berbuf   res = BB_NULL;
331
332 #ifdef BACKSQL_TRACE
333         Debug( LDAP_DEBUG_TRACE, "==>backsql_merge_from_clause(): "
334                 "dest_from=\"%s\",src_from=\"%s\"\n",
335                 dest_from ? dest_from->bb_val.bv_val : "<NULL>",
336                 src_from->bv_val, 0 );
337 #endif /* BACKSQL_TRACE */
338
339         srcc = ch_strdup( src_from->bv_val );
340         p = srcc;
341
342         if ( dest_from != NULL ) {
343                 res = *dest_from;
344         }
345         
346         while ( *p ) {
347                 s = backsql_get_table_spec( bi, &p );
348
349 #ifdef BACKSQL_TRACE
350                 Debug( LDAP_DEBUG_TRACE, "backsql_merge_from_clause(): "
351                         "p=\"%s\" s=\"%s\"\n", p, s, 0 );
352 #endif /* BACKSQL_TRACE */
353
354                 if ( BER_BVISNULL( &res.bb_val ) ) {
355                         backsql_strcat_x( &res, NULL, s, NULL );
356
357                 } else {
358                         pos = strstr( res.bb_val.bv_val, s );
359                         if ( pos == NULL || ( ( e = pos[ strlen( s ) ] ) != '\0' && e != ',' ) ) {
360                                 backsql_strfcat_x( &res, NULL, "cs", ',', s );
361                         }
362                 }
363                 
364                 if ( s ) {
365                         ch_free( s );
366                 }
367         }
368
369 #ifdef BACKSQL_TRACE
370         Debug( LDAP_DEBUG_TRACE, "<==backsql_merge_from_clause()\n", 0, 0, 0 );
371 #endif /* BACKSQL_TRACE */
372
373         free( srcc );
374         *dest_from = res;
375
376         return 1;
377 }
378
379 /*
380  * splits a pattern in components separated by '?'
381  * (double ?? are turned into single ? and left in the string)
382  * expected contains the number of expected occurrences of '?'
383  * (a negative value means parse as many as possible)
384  */
385
386 int
387 backsql_split_pattern(
388         const char      *_pattern,
389         BerVarray       *split_pattern,
390         int             expected )
391 {
392         char            *pattern, *start, *end;
393         struct berval   bv;
394         int             rc = 0;
395
396 #define SPLIT_CHAR      '?'
397         
398         assert( _pattern != NULL );
399         assert( split_pattern != NULL );
400
401         pattern = ch_strdup( _pattern );
402
403         start = pattern;
404         end = strchr( start, SPLIT_CHAR );
405         for ( ; start; expected-- ) {
406                 char            *real_end = end;
407                 ber_len_t       real_len;
408                 
409                 if ( real_end == NULL ) {
410                         real_end = start + strlen( start );
411
412                 } else if ( real_end[ 1 ] == SPLIT_CHAR ) {
413                         expected++;
414                         AC_MEMCPY( real_end, real_end + 1, strlen( real_end ) );
415                         end = strchr( real_end + 1, SPLIT_CHAR );
416                         continue;
417                 }
418
419                 real_len = real_end - start;
420                 if ( real_len == 0 ) {
421                         ber_str2bv( "", 0, 1, &bv );
422                 } else {
423                         ber_str2bv( start, real_len, 1, &bv );
424                 }
425
426                 ber_bvarray_add( split_pattern, &bv );
427
428                 if ( expected == 0 ) {
429                         if ( end != NULL ) {
430                                 rc = -1;
431                                 goto done;
432                         }
433                         break;
434                 }
435
436                 if ( end != NULL ) {
437                         start = end + 1;
438                         end = strchr( start, SPLIT_CHAR );
439                 }
440         }
441
442 done:;
443
444         ch_free( pattern );
445
446         return rc;
447 }
448
449 int
450 backsql_prepare_pattern(
451         BerVarray       split_pattern,
452         BerVarray       values,
453         struct berval   *res )
454 {
455         int             i;
456         struct berbuf   bb = BB_NULL;
457
458         assert( res != NULL );
459
460         for ( i = 0; values[i].bv_val; i++ ) {
461                 if ( split_pattern[i].bv_val == NULL ) {
462                         ch_free( bb.bb_val.bv_val );
463                         return -1;
464                 }
465                 backsql_strfcat_x( &bb, NULL, "b", &split_pattern[ i ] );
466                 backsql_strfcat_x( &bb, NULL, "b", &values[ i ] );
467         }
468
469         if ( split_pattern[ i ].bv_val == NULL ) {
470                 ch_free( bb.bb_val.bv_val );
471                 return -1;
472         }
473
474         backsql_strfcat_x( &bb, NULL, "b", &split_pattern[ i ] );
475
476         *res = bb.bb_val;
477
478         return 0;
479 }
480
481 int
482 backsql_entryUUID(
483         backsql_info    *bi,
484         backsql_entryID *id,
485         struct berval   *entryUUID,
486         void            *memctx )
487 {
488         char            uuidbuf[ LDAP_LUTIL_UUIDSTR_BUFSIZE ];
489         struct berval   uuid;
490 #ifdef BACKSQL_ARBITRARY_KEY
491         int             i;
492         ber_len_t       l, lmax;
493 #endif /* BACKSQL_ARBITRARY_KEY */
494
495         /* entryUUID is generated as "%08x-%04x-%04x-0000-eaddrXXX"
496          * with eid_oc_id as %08x and hi and lo eid_id as %04x-%04x */
497         assert( bi != NULL );
498         assert( id != NULL );
499         assert( entryUUID != NULL );
500
501 #ifdef BACKSQL_ARBITRARY_KEY
502         snprintf( uuidbuf, sizeof( uuidbuf ),
503                         "%08x-0000-0000-0000-000000000000",
504                         ( id->eid_oc_id & 0xFFFFFFFF ) );
505         lmax = id->eid_keyval.bv_len < 12 ? id->eid_keyval.bv_len : 12;
506         for ( l = 0, i = 9; l < lmax; l++, i += 2 ) {
507                 switch ( i ) {
508                 case STRLENOF( "00000000-0000" ):
509                 case STRLENOF( "00000000-0000-0000" ):
510                 case STRLENOF( "00000000-0000-0000-0000" ):
511                         uuidbuf[ i++ ] = '-';
512                 /* FALLTHRU */
513
514                 default:
515                         snprintf( &uuidbuf[ i ], 3, "%2x", id->eid_keyval.bv_val[ l ] );
516                         break;
517                 }
518         }
519 #else /* ! BACKSQL_ARBITRARY_KEY */
520         /* note: works only with 32 bit architectures... */
521         snprintf( uuidbuf, sizeof( uuidbuf ),
522                         "%08x-%04x-%04x-0000-000000000000",
523                         ( (unsigned)id->eid_oc_id & 0xFFFFFFFF ),
524                         ( ( (unsigned)id->eid_keyval & 0xFFFF0000 ) >> 020 /* 16 */ ),
525                         ( (unsigned)id->eid_keyval & 0xFFFF ) );
526 #endif /* ! BACKSQL_ARBITRARY_KEY */
527
528         uuid.bv_val = uuidbuf;
529         uuid.bv_len = strlen( uuidbuf );
530
531         ber_dupbv_x( entryUUID, &uuid, memctx );
532
533         return 0;
534 }
535
536 int
537 backsql_entryUUID_decode(
538         struct berval   *entryUUID,
539         unsigned long   *oc_id,
540 #ifdef BACKSQL_ARBITRARY_KEY
541         struct berval   *keyval
542 #else /* ! BACKSQL_ARBITRARY_KEY */
543         unsigned long   *keyval
544 #endif /* ! BACKSQL_ARBITRARY_KEY */
545         )
546 {
547 #if 0
548         fprintf( stderr, "==> backsql_entryUUID_decode()\n" );
549 #endif
550
551         *oc_id = ( entryUUID->bv_val[0] << 030 /* 24 */ )
552                 + ( entryUUID->bv_val[1] << 020 /* 16 */ )
553                 + ( entryUUID->bv_val[2] << 010 /* 8 */ )
554                 + entryUUID->bv_val[3];
555
556 #ifdef BACKSQL_ARBITRARY_KEY
557         /* FIXME */
558 #else /* ! BACKSQL_ARBITRARY_KEY */
559         *keyval = ( entryUUID->bv_val[4] << 030 /* 24 */ )
560                 + ( entryUUID->bv_val[5] << 020 /* 16 */ )
561                 + ( entryUUID->bv_val[6] << 010 /* 8 */ )
562                 + entryUUID->bv_val[7];
563 #endif /* ! BACKSQL_ARBITRARY_KEY */
564
565 #if 0
566         fprintf( stderr, "<== backsql_entryUUID_decode(): oc=%lu id=%lu\n",
567                         *oc_id, *keyval );
568 #endif
569
570         return LDAP_SUCCESS;
571 }
572