1 /* unique.c - attribute uniqueness module */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 2004-2005 The OpenLDAP Foundation.
6 * Portions Copyright 2004 Symas Corporation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
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>.
18 * This work was initially developed by Symas Corp. for inclusion in
19 * OpenLDAP Software. This work was sponsored by Hewlett-Packard.
24 #ifdef SLAPD_OVER_UNIQUE
28 #include <ac/string.h>
29 #include <ac/socket.h>
33 static slap_overinst unique;
35 typedef struct unique_attrs_s {
36 struct unique_attrs_s *next; /* list of attrs */
37 AttributeDescription *attr;
40 typedef struct unique_data_s {
41 const char *message; /* breadcrumbs */
42 struct unique_attrs_s *attrs; /* list of known attrs */
43 struct unique_attrs_s *ignore; /* list of ignored attrs */
44 BerValue dn; /* base of "unique tree" */
45 char strict; /* null considered unique too */
48 typedef struct unique_counter_s {
54 ** allocate new unique_data;
55 ** initialize, copy basedn;
56 ** store in on_bi.bi_private;
60 static int unique_db_init(
64 slap_overinst *on = (slap_overinst *)be->bd_info;
65 unique_data *ud = ch_malloc(sizeof(unique_data));
67 /* Debug(LDAP_DEBUG_TRACE, "==> unique_init\n", 0, 0, 0); */
69 ud->message = "_init";
74 /* default to the base of our configured database */
75 ber_dupbv(&ud->dn, &be->be_nsuffix[0]);
76 on->on_bi.bi_private = ud;
83 ** if command = attributes:
85 ** convert to attribute;
86 ** add to configured attribute list;
87 ** elseif command = base:
88 ** set our basedn to argument;
89 ** else complain about invalid directive;
93 static int unique_config(
101 slap_overinst *on = (slap_overinst *) be->bd_info;
102 unique_data *ud = on->on_bi.bi_private;
105 AttributeDescription *ad;
108 ud->message = "_config";
109 Debug(LDAP_DEBUG_TRACE, "==> unique_config\n", 0, 0, 0);
111 if(!strcasecmp(*argv, "unique_attributes") ||
112 !strcasecmp(*argv, "unique_ignore")) {
113 for(i = 1; i < argc; i++) {
114 for(up = ud->attrs; up; up = up->next)
115 if(!strcmp(argv[i], up->attr->ad_cname.bv_val)) {
116 Debug(LDAP_DEBUG_ANY,
117 "%s: line %d: duplicate attribute <%s>, ignored\n",
118 fname, lineno, argv[i]);
122 if(slap_str2ad(argv[i], &ad, &text) != LDAP_SUCCESS) {
123 Debug(LDAP_DEBUG_ANY,
124 "%s: line %d: bad attribute <%s>, ignored\n",
125 fname, lineno, text);
127 } else if(ad->ad_next) {
128 Debug(LDAP_DEBUG_ANY,
129 "%s: line %d: multiple attributes match <%s>, ignored\n",
130 fname, lineno, argv[i]);
133 up = ch_malloc(sizeof(unique_attrs));
135 if(!strcasecmp(*argv, "unique_ignore")) {
136 up->next = ud->ignore;
139 up->next = ud->attrs;
142 Debug(LDAP_DEBUG_CONFIG, "%s: line %d: new attribute <%s>\n",
143 fname, lineno, argv[i]);
145 } else if(!strcasecmp(*argv, "unique_strict")) {
147 } else if(!strcasecmp(*argv, "unique_base")) {
149 ber_str2bv( argv[1], 0, 0, &bv );
150 ch_free(ud->dn.bv_val);
151 dnNormalize(0, NULL, NULL, &bv, &ud->dn, NULL);
152 Debug(LDAP_DEBUG_CONFIG, "%s: line %d: new base dn <%s>\n",
153 fname, lineno, argv[1]);
155 return(SLAP_CONF_UNKNOWN);
163 ** mostly, just print the init message;
172 slap_overinst *on = (slap_overinst *)be->bd_info;
173 unique_data *ud = on->on_bi.bi_private;
174 ud->message = "_open";
176 Debug(LDAP_DEBUG_TRACE, "unique_open: overlay initialized\n", 0, 0, 0);
183 ** foreach configured attribute:
186 ** (do not) free ud->message;
187 ** reset on_bi.bi_private;
188 ** free our config data;
197 slap_overinst *on = (slap_overinst *) be->bd_info;
198 unique_data *ud = on->on_bi.bi_private;
199 unique_attrs *ii, *ij;
200 ud->message = "_close";
202 Debug(LDAP_DEBUG_TRACE, "==> unique_close\n", 0, 0, 0);
204 for(ii = ud->attrs; ii; ii = ij) {
209 for(ii = ud->ignore; ii; ii = ij) {
214 ch_free(ud->dn.bv_val);
216 on->on_bi.bi_private = NULL; /* XXX */
226 ** if this is a REP_SEARCH, count++;
230 static int count_attr_cb(
237 /* because you never know */
238 if(!op || !rs) return(0);
240 /* Only search entries are interesting */
241 if(rs->sr_type != REP_SEARCH) return(0);
243 uc = op->o_callback->sc_private;
245 /* Ignore the current entry */
246 if ( dn_match( uc->ndn, &rs->sr_entry->e_nname )) return(0);
248 Debug(LDAP_DEBUG_TRACE, "==> count_attr_cb <%s>\n",
249 rs->sr_entry ? rs->sr_entry->e_name.bv_val : "UNKNOWN_DN", 0, 0);
256 static int count_filter_len(
258 AttributeDescription *ad,
266 while(!is_at_operational(ad->ad_type)) {
268 for(up = ud->ignore; up; up = up->next)
269 if(ad == up->attr) break;
273 for(up = ud->attrs; up; up = up->next)
274 if(ad == up->attr) break;
277 if(b && b[0].bv_val) for(i = 0; b[i].bv_val; i++)
278 ks += b[i].bv_len + ad->ad_cname.bv_len + STRLENOF( "(=)" );
280 ks += ad->ad_cname.bv_len + STRLENOF( "(=*)" ); /* (attr=*) */
286 static char *build_filter(
288 AttributeDescription *ad,
296 while(!is_at_operational(ad->ad_type)) {
298 for(up = ud->ignore; up; up = up->next)
299 if(ad == up->attr) break;
303 for(up = ud->attrs; up; up = up->next)
304 if(ad == up->attr) break;
307 if(b && b[0].bv_val) for(i = 0; b[i].bv_val; i++)
308 kp += sprintf(kp, "(%s=%s)", ad->ad_cname.bv_val, b[i].bv_val);
310 kp += sprintf(kp, "(%s=*)", ad->ad_cname.bv_val);
316 static int unique_search(
323 slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
324 unique_data *ud = on->on_bi.bi_private;
325 SlapReply nrs = { REP_RESULT };
326 slap_callback cb = { NULL, NULL, NULL, NULL }; /* XXX */
327 unique_counter uq = { NULL, 0 };
330 nop->ors_filter = str2filter_x(nop, key);
331 ber_str2bv(key, 0, 0, &nop->ors_filterstr);
333 cb.sc_response = (slap_response*)count_attr_cb;
335 nop->o_callback = &cb;
336 nop->o_tag = LDAP_REQ_SEARCH;
337 nop->ors_scope = LDAP_SCOPE_SUBTREE;
338 nop->ors_deref = LDAP_DEREF_NEVER;
339 nop->ors_limit = NULL;
340 nop->ors_slimit = SLAP_NO_LIMIT;
341 nop->ors_tlimit = SLAP_NO_LIMIT;
342 nop->ors_attrs = slap_anlist_no_attrs;
343 nop->ors_attrsonly = 1;
345 uq.ndn = &op->o_req_ndn;
347 nop->o_req_ndn = ud->dn;
348 nop->o_ndn = op->o_bd->be_rootndn;
350 rc = nop->o_bd->be_search(nop, &nrs);
351 filter_free_x(nop, nop->ors_filter);
354 if(rc != LDAP_SUCCESS && rc != LDAP_NO_SUCH_OBJECT) {
355 op->o_bd->bd_info = (BackendInfo *) on->on_info;
356 send_ldap_error(op, rs, rc, "unique_search failed");
360 Debug(LDAP_DEBUG_TRACE, "=> unique_search found %d records\n", uq.count, 0, 0);
363 op->o_bd->bd_info = (BackendInfo *) on->on_info;
364 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
365 "some attributes not unique");
369 return(SLAP_CB_CONTINUE);
372 static int unique_add(
377 slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
378 unique_data *ud = on->on_bi.bi_private;
385 Debug(LDAP_DEBUG_TRACE, "==> unique_add <%s>\n", op->o_req_dn.bv_val, 0, 0);
387 /* validate backend. Should have already been done, but whatever */
388 nop.o_bd = select_backend(&ud->dn, 0, 1);
390 if (!nop.o_bd->be_search) {
391 op->o_bd->bd_info = (BackendInfo *) on->on_info;
392 send_ldap_error(op, rs, LDAP_UNWILLING_TO_PERFORM,
393 "backend missing search function");
397 op->o_bd->bd_info = (BackendInfo *) on->on_info;
398 send_ldap_error(op, rs, LDAP_OTHER,
399 "no known backend? this shouldn't be happening!");
404 ** count everything first;
405 ** allocate some memory;
406 ** write the search key;
410 if(!(a = op->ora_e->e_attrs)) {
411 op->o_bd->bd_info = (BackendInfo *) on->on_info;
412 send_ldap_error(op, rs, LDAP_INVALID_SYNTAX,
413 "unique_add() got null op.ora_e.e_attrs");
415 } else for(; a; a = a->a_next) {
416 ks = count_filter_len(ud, a->a_desc, a->a_vals, ks);
421 kp = key + sprintf(key, "(|");
423 for(a = op->ora_e->e_attrs; a; a = a->a_next) {
424 kp = build_filter(ud, a->a_desc, a->a_vals, kp);
429 Debug(LDAP_DEBUG_TRACE, "=> unique_add %s\n", key, 0, 0);
431 return unique_search(op, &nop, rs, key);
435 static int unique_modify(
440 slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
441 unique_data *ud = on->on_bi.bi_private;
446 int ks = 16; /* a handful of extra bytes */
448 Debug(LDAP_DEBUG_TRACE, "==> unique_modify <%s>\n", op->o_req_dn.bv_val, 0, 0);
450 nop.o_bd = select_backend(&ud->dn, 0, 1);
452 if (!nop.o_bd->be_search) {
453 op->o_bd->bd_info = (BackendInfo *) on->on_info;
454 send_ldap_error(op, rs, LDAP_UNWILLING_TO_PERFORM,
455 "backend missing search function");
459 op->o_bd->bd_info = (BackendInfo *) on->on_info;
460 send_ldap_error(op, rs, LDAP_OTHER,
461 "no known backend? this shouldn't be happening!");
466 ** count everything first;
467 ** allocate some memory;
468 ** write the search key;
472 if(!(m = op->orm_modlist)) {
473 op->o_bd->bd_info = (BackendInfo *) on->on_info;
474 send_ldap_error(op, rs, LDAP_INVALID_SYNTAX,
475 "unique_modify() got null op.orm_modlist");
477 } else for(; m; m = m->sml_next) {
478 if ((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) continue;
479 ks = count_filter_len(ud, m->sml_desc, m->sml_values, ks);
484 kp = key + sprintf(key, "(|");
486 for(m = op->orm_modlist; m; m = m->sml_next) {
487 if ((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) continue;
488 kp = build_filter(ud, m->sml_desc, m->sml_values, kp);
493 Debug(LDAP_DEBUG_TRACE, "=> unique_modify %s\n", key, 0, 0);
495 return unique_search(op, &nop, rs, key);
499 static int unique_modrdn(
504 slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
505 unique_data *ud = on->on_bi.bi_private;
509 int i, ks = 16; /* a handful of extra bytes */
513 Debug(LDAP_DEBUG_TRACE, "==> unique_modrdn <%s> <%s>\n",
514 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
516 nop.o_bd = select_backend(&ud->dn, 0, 1);
518 if (!nop.o_bd->be_search) {
519 op->o_bd->bd_info = (BackendInfo *) on->on_info;
520 send_ldap_error(op, rs, LDAP_UNWILLING_TO_PERFORM,
521 "backend missing search function");
525 op->o_bd->bd_info = (BackendInfo *) on->on_info;
526 send_ldap_error(op, rs, LDAP_OTHER,
527 "no known backend? this shouldn't be happening!");
531 if(ldap_bv2rdn_x(&op->oq_modrdn.rs_newrdn, &newrdn,
532 (char **)&rs->sr_text, LDAP_DN_FORMAT_LDAP, op->o_tmpmemctx )) {
533 op->o_bd->bd_info = (BackendInfo *) on->on_info;
534 send_ldap_error(op, rs, LDAP_INVALID_SYNTAX,
535 "unknown type(s) used in RDN");
538 for(i = 0; newrdn[i]; i++) {
539 AttributeDescription *ad = NULL;
540 if ( slap_bv2ad( &newrdn[i]->la_attr, &ad, &rs->sr_text )) {
541 ldap_rdnfree_x( newrdn, op->o_tmpmemctx );
542 rs->sr_err = LDAP_INVALID_SYNTAX;
543 send_ldap_result( op, rs );
546 newrdn[i]->la_private = ad;
552 for(i = 0; newrdn[i]; i++) {
553 bv[0] = newrdn[i]->la_value;
554 ks = count_filter_len(ud, newrdn[i]->la_private, bv, ks);
558 kp = key + sprintf(key, "(|");
560 for(i = 0; newrdn[i]; i++) {
561 bv[0] = newrdn[i]->la_value;
562 kp = build_filter(ud, newrdn[i]->la_private, bv, kp);
567 Debug(LDAP_DEBUG_TRACE, "=> unique_modrdn %s\n", key, 0, 0);
569 return unique_search(op, &nop, rs, key);
573 ** init_module is last so the symbols resolve "for free" --
574 ** it expects to be called automagically during dynamic module initialization
579 /* statically declared just after the #includes at top */
580 unique.on_bi.bi_type = "unique";
581 unique.on_bi.bi_db_init = unique_db_init;
582 unique.on_bi.bi_db_config = unique_config;
583 unique.on_bi.bi_db_open = unique_open;
584 unique.on_bi.bi_db_close = unique_close;
585 unique.on_bi.bi_op_add = unique_add;
586 unique.on_bi.bi_op_modify = unique_modify;
587 unique.on_bi.bi_op_modrdn = unique_modrdn;
588 unique.on_bi.bi_op_delete = NULL;
590 return(overlay_register(&unique));
593 #if SLAPD_OVER_UNIQUE == SLAPD_MOD_DYNAMIC && defined(PIC)
594 int init_module(int argc, char *argv[]) {
595 return unique_init();
599 #endif /* SLAPD_OVER_UNIQUE */