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[openldap] / servers / slapd / cr.c
1 /* cr.c - content rule routines */
2 /* $OpenLDAP$ */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4  *
5  * Copyright 1998-2010 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
27 struct cindexrec {
28         struct berval   cir_name;
29         ContentRule     *cir_cr;
30 };
31
32 static Avlnode  *cr_index = NULL;
33 static LDAP_STAILQ_HEAD(CRList, ContentRule) cr_list
34         = LDAP_STAILQ_HEAD_INITIALIZER(cr_list);
35
36 static int
37 cr_index_cmp(
38     const void  *v_cir1,
39     const void  *v_cir2 )
40 {
41         const struct cindexrec  *cir1 = v_cir1;
42         const struct cindexrec  *cir2 = v_cir2;
43         int i = cir1->cir_name.bv_len - cir2->cir_name.bv_len;
44         if (i) return i;
45         return strcasecmp( cir1->cir_name.bv_val, cir2->cir_name.bv_val );
46 }
47
48 static int
49 cr_index_name_cmp(
50     const void  *v_name,
51     const void  *v_cir )
52 {
53         const struct berval    *name = v_name;
54         const struct cindexrec *cir  = v_cir;
55         int i = name->bv_len - cir->cir_name.bv_len;
56         if (i) return i;
57         return strncasecmp( name->bv_val, cir->cir_name.bv_val, name->bv_len );
58 }
59
60 ContentRule *
61 cr_find( const char *crname )
62 {
63         struct berval bv;
64
65         bv.bv_val = (char *)crname;
66         bv.bv_len = strlen( crname );
67
68         return( cr_bvfind( &bv ) );
69 }
70
71 ContentRule *
72 cr_bvfind( struct berval *crname )
73 {
74         struct cindexrec        *cir;
75
76         cir = avl_find( cr_index, crname, cr_index_name_cmp );
77
78         if ( cir != NULL ) {
79                 return( cir->cir_cr );
80         }
81
82         return( NULL );
83 }
84
85 static int
86 cr_destroy_one( ContentRule *c )
87 {
88         assert( c != NULL );
89
90         if (c->scr_auxiliaries) ldap_memfree(c->scr_auxiliaries);
91         if (c->scr_required) ldap_memfree(c->scr_required);
92         if (c->scr_allowed) ldap_memfree(c->scr_allowed);
93         if (c->scr_precluded) ldap_memfree(c->scr_precluded);
94         ldap_contentrule_free((LDAPContentRule *)c);
95
96         return 0;
97 }
98
99 void
100 cr_destroy( void )
101 {
102         ContentRule *c;
103
104         avl_free(cr_index, ldap_memfree);
105
106         while( !LDAP_STAILQ_EMPTY(&cr_list) ) {
107                 c = LDAP_STAILQ_FIRST(&cr_list);
108                 LDAP_STAILQ_REMOVE_HEAD(&cr_list, scr_next);
109
110                 cr_destroy_one( c );
111         }
112 }
113
114 static int
115 cr_insert(
116     ContentRule         *scr,
117     const char          **err
118 )
119 {
120         struct cindexrec        *cir;
121         char                    **names;
122
123         if ( scr->scr_oid ) {
124                 cir = (struct cindexrec *)
125                         ch_calloc( 1, sizeof(struct cindexrec) );
126                 cir->cir_name.bv_val = scr->scr_oid;
127                 cir->cir_name.bv_len = strlen( scr->scr_oid );
128                 cir->cir_cr = scr;
129
130                 assert( cir->cir_name.bv_val != NULL );
131                 assert( cir->cir_cr != NULL );
132
133                 if ( avl_insert( &cr_index, (caddr_t) cir,
134                                  cr_index_cmp, avl_dup_error ) )
135                 {
136                         *err = scr->scr_oid;
137                         ldap_memfree(cir);
138                         return SLAP_SCHERR_CR_DUP;
139                 }
140
141                 /* FIX: temporal consistency check */
142                 assert( cr_bvfind(&cir->cir_name) != NULL );
143         }
144
145         if ( (names = scr->scr_names) ) {
146                 while ( *names ) {
147                         cir = (struct cindexrec *)
148                                 ch_calloc( 1, sizeof(struct cindexrec) );
149                         cir->cir_name.bv_val = *names;
150                         cir->cir_name.bv_len = strlen( *names );
151                         cir->cir_cr = scr;
152
153                         assert( cir->cir_name.bv_val != NULL );
154                         assert( cir->cir_cr != NULL );
155
156                         if ( avl_insert( &cr_index, (caddr_t) cir,
157                                          cr_index_cmp, avl_dup_error ) )
158                         {
159                                 *err = *names;
160                                 ldap_memfree(cir);
161                                 return SLAP_SCHERR_CR_DUP;
162                         }
163
164                         /* FIX: temporal consistency check */
165                         assert( cr_bvfind(&cir->cir_name) != NULL );
166
167                         names++;
168                 }
169         }
170
171         LDAP_STAILQ_INSERT_TAIL(&cr_list, scr, scr_next);
172
173         return 0;
174 }
175
176 static int
177 cr_add_auxiliaries(
178     ContentRule         *scr,
179         int                     *op,
180     const char          **err )
181 {
182         int naux;
183
184         if( scr->scr_oc_oids_aux == NULL ) return 0;
185         
186         for( naux=0; scr->scr_oc_oids_aux[naux]; naux++ ) {
187                 /* count them */ ;
188         }
189
190         scr->scr_auxiliaries = ch_calloc( naux+1, sizeof(ObjectClass *));
191
192         for( naux=0; scr->scr_oc_oids_aux[naux]; naux++ ) {
193                 ObjectClass *soc = scr->scr_auxiliaries[naux]
194                         = oc_find(scr->scr_oc_oids_aux[naux]);
195                 if ( !soc ) {
196                         *err = scr->scr_oc_oids_aux[naux];
197                         return SLAP_SCHERR_CLASS_NOT_FOUND;
198                 }
199
200                 if( soc->soc_flags & SLAP_OC_OPERATIONAL &&
201                         soc != slap_schema.si_oc_extensibleObject )
202                 {
203                         (*op)++;
204                 }
205
206                 if( soc->soc_kind != LDAP_SCHEMA_AUXILIARY ) {
207                         *err = scr->scr_oc_oids_aux[naux];
208                         return SLAP_SCHERR_CR_BAD_AUX;
209                 }
210         }
211
212         scr->scr_auxiliaries[naux] = NULL;
213         return 0;
214 }
215
216 static int
217 cr_create_required(
218     ContentRule         *scr,
219         int                     *op,
220     const char          **err )
221 {
222     char                **attrs = scr->scr_at_oids_must;
223         char            **attrs1;
224         AttributeType   *sat;
225
226         if ( attrs ) {
227                 attrs1 = attrs;
228                 while ( *attrs1 ) {
229                         sat = at_find(*attrs1);
230                         if ( !sat ) {
231                                 *err = *attrs1;
232                                 return SLAP_SCHERR_ATTR_NOT_FOUND;
233                         }
234
235                         if( is_at_operational( sat )) (*op)++;
236
237                         if ( at_find_in_list(sat, scr->scr_required) < 0) {
238                                 if ( at_append_to_list(sat, &scr->scr_required) ) {
239                                         *err = *attrs1;
240                                         return SLAP_SCHERR_OUTOFMEM;
241                                 }
242                         } else {
243                                 *err = *attrs1;
244                                 return SLAP_SCHERR_CR_BAD_AT;
245                         }
246                         attrs1++;
247                 }
248         }
249         return 0;
250 }
251
252 static int
253 cr_create_allowed(
254     ContentRule         *scr,
255         int                     *op,
256     const char          **err )
257 {
258     char                **attrs = scr->scr_at_oids_may;
259         char            **attrs1;
260         AttributeType   *sat;
261
262         if ( attrs ) {
263                 attrs1 = attrs;
264                 while ( *attrs1 ) {
265                         sat = at_find(*attrs1);
266                         if ( !sat ) {
267                                 *err = *attrs1;
268                                 return SLAP_SCHERR_ATTR_NOT_FOUND;
269                         }
270
271                         if( is_at_operational( sat )) (*op)++;
272
273                         if ( at_find_in_list(sat, scr->scr_required) < 0 &&
274                                 at_find_in_list(sat, scr->scr_allowed) < 0 )
275                         {
276                                 if ( at_append_to_list(sat, &scr->scr_allowed) ) {
277                                         *err = *attrs1;
278                                         return SLAP_SCHERR_OUTOFMEM;
279                                 }
280                         } else {
281                                 *err = *attrs1;
282                                 return SLAP_SCHERR_CR_BAD_AT;
283                         }
284                         attrs1++;
285                 }
286         }
287         return 0;
288 }
289
290 static int
291 cr_create_precluded(
292     ContentRule         *scr,
293         int                     *op,
294     const char          **err )
295 {
296     char                **attrs = scr->scr_at_oids_not;
297         char            **attrs1;
298         AttributeType   *sat;
299
300         if ( attrs ) {
301                 attrs1 = attrs;
302                 while ( *attrs1 ) {
303                         sat = at_find(*attrs1);
304                         if ( !sat ) {
305                                 *err = *attrs1;
306                                 return SLAP_SCHERR_ATTR_NOT_FOUND;
307                         }
308
309                         if( is_at_operational( sat )) (*op)++;
310
311                         /* FIXME: should also make sure attribute type is not
312                                 a required attribute of the structural class or
313                                 any auxiliary class */
314                         if ( at_find_in_list(sat, scr->scr_required) < 0 &&
315                                 at_find_in_list(sat, scr->scr_allowed) < 0 &&
316                                 at_find_in_list(sat, scr->scr_precluded) < 0 )
317                         {
318                                 if ( at_append_to_list(sat, &scr->scr_precluded) ) {
319                                         *err = *attrs1;
320                                         return SLAP_SCHERR_OUTOFMEM;
321                                 }
322                         } else {
323                                 *err = *attrs1;
324                                 return SLAP_SCHERR_CR_BAD_AT;
325                         }
326                         attrs1++;
327                 }
328         }
329         return 0;
330 }
331
332 int
333 cr_add(
334     LDAPContentRule     *cr,
335         int user,
336         ContentRule **rscr,
337     const char          **err
338 )
339 {
340         ContentRule     *scr;
341         int             code;
342         int             op = 0;
343         char    *oidm = NULL;
344
345         if ( cr->cr_names != NULL ) {
346                 int i;
347
348                 for( i=0; cr->cr_names[i]; i++ ) {
349                         if( !slap_valid_descr( cr->cr_names[i] ) ) {
350                                 return SLAP_SCHERR_BAD_DESCR;
351                         }
352                 }
353         }
354
355         if ( !OID_LEADCHAR( cr->cr_oid[0] )) {
356                 /* Expand OID macros */
357                 char *oid = oidm_find( cr->cr_oid );
358                 if ( !oid ) {
359                         *err = cr->cr_oid;
360                         return SLAP_SCHERR_OIDM;
361                 }
362                 if ( oid != cr->cr_oid ) {
363                         oidm = cr->cr_oid;
364                         cr->cr_oid = oid;
365                 }
366         }
367
368         scr = (ContentRule *) ch_calloc( 1, sizeof(ContentRule) );
369         AC_MEMCPY( &scr->scr_crule, cr, sizeof(LDAPContentRule) );
370
371         scr->scr_oidmacro = oidm;
372         scr->scr_sclass = oc_find(cr->cr_oid);
373         if ( !scr->scr_sclass ) {
374                 *err = cr->cr_oid;
375                 code = SLAP_SCHERR_CLASS_NOT_FOUND;
376                 goto fail;
377         }
378
379         /* check object class usage */
380         if( scr->scr_sclass->soc_kind != LDAP_SCHEMA_STRUCTURAL )
381         {
382                 *err = cr->cr_oid;
383                 code = SLAP_SCHERR_CR_BAD_STRUCT;
384                 goto fail;
385         }
386
387         if( scr->scr_sclass->soc_flags & SLAP_OC_OPERATIONAL ) op++;
388
389         code = cr_add_auxiliaries( scr, &op, err );
390         if ( code != 0 ) goto fail;
391
392         code = cr_create_required( scr, &op, err );
393         if ( code != 0 ) goto fail;
394
395         code = cr_create_allowed( scr, &op, err );
396         if ( code != 0 ) goto fail;
397
398         code = cr_create_precluded( scr, &op, err );
399         if ( code != 0 ) goto fail;
400
401         if( user && op ) {
402                 code = SLAP_SCHERR_CR_BAD_AUX;
403                 goto fail;
404         }
405
406         code = cr_insert(scr,err);
407         if ( code == 0 && rscr )
408                 *rscr = scr;
409         return code;
410 fail:
411         ch_free( scr );
412         return code;
413 }
414
415 void
416 cr_unparse( BerVarray *res, ContentRule *start, ContentRule *end, int sys )
417 {
418         ContentRule *cr;
419         int i, num;
420         struct berval bv, *bva = NULL, idx;
421         char ibuf[32];
422
423         if ( !start )
424                 start = LDAP_STAILQ_FIRST( &cr_list );
425
426         /* count the result size */
427         i = 0;
428         for ( cr=start; cr; cr=LDAP_STAILQ_NEXT(cr, scr_next)) {
429                 if ( sys && !(cr->scr_flags & SLAP_CR_HARDCODE)) continue;
430                 i++;
431                 if ( cr == end ) break;
432         }
433         if (!i) return;
434
435         num = i;
436         bva = ch_malloc( (num+1) * sizeof(struct berval) );
437         BER_BVZERO( bva );
438         idx.bv_val = ibuf;
439         if ( sys ) {
440                 idx.bv_len = 0;
441                 ibuf[0] = '\0';
442         }
443         i = 0;
444         for ( cr=start; cr; cr=LDAP_STAILQ_NEXT(cr, scr_next)) {
445                 LDAPContentRule lcr, *lcrp;
446                 if ( sys && !(cr->scr_flags & SLAP_CR_HARDCODE)) continue;
447                 if ( cr->scr_oidmacro ) {
448                         lcr = cr->scr_crule;
449                         lcr.cr_oid = cr->scr_oidmacro;
450                         lcrp = &lcr;
451                 } else {
452                         lcrp = &cr->scr_crule;
453                 }
454                 if ( ldap_contentrule2bv( lcrp, &bv ) == NULL ) {
455                         ber_bvarray_free( bva );
456                 }
457                 if ( !sys ) {
458                         idx.bv_len = sprintf(idx.bv_val, "{%d}", i);
459                 }
460                 bva[i].bv_len = idx.bv_len + bv.bv_len;
461                 bva[i].bv_val = ch_malloc( bva[i].bv_len + 1 );
462                 strcpy( bva[i].bv_val, ibuf );
463                 strcpy( bva[i].bv_val + idx.bv_len, bv.bv_val );
464                 i++;
465                 bva[i].bv_val = NULL;
466                 ldap_memfree( bv.bv_val );
467                 if ( cr == end ) break;
468         }
469         *res = bva;
470 }
471
472 int
473 cr_schema_info( Entry *e )
474 {
475         AttributeDescription *ad_ditContentRules
476                 = slap_schema.si_ad_ditContentRules;
477         ContentRule     *cr;
478
479         struct berval   val;
480         struct berval   nval;
481
482         LDAP_STAILQ_FOREACH(cr, &cr_list, scr_next) {
483                 if ( ldap_contentrule2bv( &cr->scr_crule, &val ) == NULL ) {
484                         return -1;
485                 }
486
487 #if 0
488                 if( cr->scr_flags & SLAP_CR_HIDE ) continue;
489 #endif
490 #if 0
491                 Debug( LDAP_DEBUG_TRACE, "Merging cr [%ld] %s\n",
492                (long) val.bv_len, val.bv_val, 0 );
493 #endif
494
495                 nval.bv_val = cr->scr_oid;
496                 nval.bv_len = strlen(cr->scr_oid);
497
498                 if( attr_merge_one( e, ad_ditContentRules, &val, &nval ) )
499                 {
500                         return -1;
501                 }
502                 ldap_memfree( val.bv_val );
503         }
504         return 0;
505 }