1 /* dyngroup.c - Demonstration of overlay code */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 2003-2008 The OpenLDAP Foundation.
6 * Copyright 2003 by Howard Chu.
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 Howard Chu for inclusion in
24 #ifdef SLAPD_OVER_DYNGROUP
28 #include <ac/string.h>
29 #include <ac/socket.h>
35 /* This overlay extends the Compare operation to detect members of a
36 * dynamic group. It has no effect on any other operations. It must
37 * be configured with a pair of attributes to trigger on, e.g.
38 * attrpair member memberURL
39 * will cause compares on "member" to trigger a compare on "memberURL".
42 typedef struct adpair {
43 struct adpair *ap_next;
44 AttributeDescription *ap_mem;
45 AttributeDescription *ap_uri;
48 static int dgroup_cf( ConfigArgs *c )
50 slap_overinst *on = (slap_overinst *)c->bi;
54 case SLAP_CONFIG_EMIT:
57 for ( ap = on->on_bi.bi_private; ap; ap = ap->ap_next ) {
60 bv.bv_len = ap->ap_mem->ad_cname.bv_len + 1 +
61 ap->ap_uri->ad_cname.bv_len;
62 bv.bv_val = ch_malloc( bv.bv_len + 1 );
63 ptr = lutil_strcopy( bv.bv_val, ap->ap_mem->ad_cname.bv_val );
65 strcpy( ptr, ap->ap_uri->ad_cname.bv_val );
66 ber_bvarray_add( &c->rvalue_vals, &bv );
72 if ( c->valx == -1 ) {
74 while (( ap = on->on_bi.bi_private )) {
75 on->on_bi.bi_private = ap->ap_next;
81 app = (adpair **)&on->on_bi.bi_private;
82 for (i=0; i<=c->valx; i++, app = &ap->ap_next) {
93 adpair ap = { NULL, NULL, NULL }, *a2;
95 if ( slap_str2ad( c->argv[1], &ap.ap_mem, &text ) ) {
96 snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s attribute description unknown: \"%s\"",
97 c->argv[0], c->argv[1] );
98 Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
99 "%s: %s\n", c->log, c->cr_msg, 0 );
102 if ( slap_str2ad( c->argv[2], &ap.ap_uri, &text ) ) {
103 snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s attribute description unknown: \"%s\"",
104 c->argv[0], c->argv[2] );
105 Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
106 "%s: %s\n", c->log, c->cr_msg, 0 );
109 /* The on->on_bi.bi_private pointer can be used for
110 * anything this instance of the overlay needs.
112 a2 = ch_malloc( sizeof(adpair) );
113 a2->ap_next = on->on_bi.bi_private;
114 a2->ap_mem = ap.ap_mem;
115 a2->ap_uri = ap.ap_uri;
116 on->on_bi.bi_private = a2;
123 static ConfigTable dgroupcfg[] = {
124 { "attrpair", "member-attribute> <URL-attribute", 3, 3, 0,
125 ARG_MAGIC, dgroup_cf,
126 "( OLcfgOvAt:17.1 NAME 'olcDGAttrPair' "
127 "DESC 'Member and MemberURL attribute pair' "
128 "SYNTAX OMsDirectoryString )", NULL, NULL },
129 { NULL, NULL, 0, 0, 0, ARG_IGNORED }
132 static ConfigOCs dgroupocs[] = {
133 { "( OLcfgOvOc:17.1 "
134 "NAME 'olcDGConfig' "
135 "DESC 'Dynamic Group configuration' "
136 "SUP olcOverlayConfig "
137 "MAY olcDGAttrPair )",
138 Cft_Overlay, dgroupcfg },
143 dyngroup_response( Operation *op, SlapReply *rs )
145 slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
146 adpair *ap = on->on_bi.bi_private;
148 /* If we've been configured and the current response is
149 * what we're looking for...
151 if ( ap && op->o_tag == LDAP_REQ_COMPARE &&
152 rs->sr_err == LDAP_NO_SUCH_ATTRIBUTE ) {
154 for (;ap;ap=ap->ap_next) {
155 if ( op->oq_compare.rs_ava->aa_desc == ap->ap_mem ) {
156 /* This compare is for one of the attributes we're
157 * interested in. We'll use slapd's existing dyngroup
158 * evaluator to get the answer we want.
160 int cache = op->o_do_not_cache;
162 op->o_do_not_cache = 1;
163 rs->sr_err = backend_group( op, NULL, &op->o_req_ndn,
164 &op->oq_compare.rs_ava->aa_value, NULL, ap->ap_uri );
165 op->o_do_not_cache = cache;
166 switch ( rs->sr_err ) {
168 rs->sr_err = LDAP_COMPARE_TRUE;
171 case LDAP_NO_SUCH_OBJECT:
172 rs->sr_err = LDAP_COMPARE_FALSE;
179 /* Default is to just fall through to the normal processing */
180 return SLAP_CB_CONTINUE;
189 slap_overinst *on = (slap_overinst *) be->bd_info;
192 for ( ap = on->on_bi.bi_private; ap; ap = a2 ) {
199 static slap_overinst dyngroup;
201 /* This overlay is set up for dynamic loading via moduleload. For static
202 * configuration, you'll need to arrange for the slap_overinst to be
203 * initialized and registered by some other function inside slapd.
206 int dyngroup_initialize() {
209 dyngroup.on_bi.bi_type = "dyngroup";
210 dyngroup.on_bi.bi_db_close = dyngroup_close;
211 dyngroup.on_response = dyngroup_response;
213 dyngroup.on_bi.bi_cf_ocs = dgroupocs;
214 code = config_register_schema( dgroupcfg, dgroupocs );
215 if ( code ) return code;
217 return overlay_register( &dyngroup );
220 #if SLAPD_OVER_DYNGROUP == SLAPD_MOD_DYNAMIC
222 init_module( int argc, char *argv[] )
224 return dyngroup_initialize();
228 #endif /* defined(SLAPD_OVER_DYNGROUP) */