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Diffstat (limited to 'servers/slapd/overlays/dyngroup.c')
| -rw-r--r-- | servers/slapd/overlays/dyngroup.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/servers/slapd/overlays/dyngroup.c b/servers/slapd/overlays/dyngroup.c new file mode 100644 index 0000000..a6a6d86 --- /dev/null +++ b/servers/slapd/overlays/dyngroup.c @@ -0,0 +1,228 @@ +/* dyngroup.c - Demonstration of overlay code */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2003-2018 The OpenLDAP Foundation. + * Copyright 2003 by Howard Chu. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* ACKNOWLEDGEMENTS: + * This work was initially developed by Howard Chu for inclusion in + * OpenLDAP Software. + */ + +#include "portable.h" + +#ifdef SLAPD_OVER_DYNGROUP + +#include <stdio.h> + +#include <ac/string.h> +#include <ac/socket.h> + +#include "lutil.h" +#include "slap.h" +#include "config.h" + +/* This overlay extends the Compare operation to detect members of a + * dynamic group. It has no effect on any other operations. It must + * be configured with a pair of attributes to trigger on, e.g. + * attrpair member memberURL + * will cause compares on "member" to trigger a compare on "memberURL". + */ + +typedef struct adpair { + struct adpair *ap_next; + AttributeDescription *ap_mem; + AttributeDescription *ap_uri; +} adpair; + +static int dgroup_cf( ConfigArgs *c ) +{ + slap_overinst *on = (slap_overinst *)c->bi; + int rc = 1; + + switch( c->op ) { + case SLAP_CONFIG_EMIT: + { + adpair *ap; + for ( ap = on->on_bi.bi_private; ap; ap = ap->ap_next ) { + struct berval bv; + char *ptr; + bv.bv_len = ap->ap_mem->ad_cname.bv_len + 1 + + ap->ap_uri->ad_cname.bv_len; + bv.bv_val = ch_malloc( bv.bv_len + 1 ); + ptr = lutil_strcopy( bv.bv_val, ap->ap_mem->ad_cname.bv_val ); + *ptr++ = ' '; + strcpy( ptr, ap->ap_uri->ad_cname.bv_val ); + ber_bvarray_add( &c->rvalue_vals, &bv ); + rc = 0; + } + } + break; + case LDAP_MOD_DELETE: + if ( c->valx == -1 ) { + adpair *ap; + while (( ap = on->on_bi.bi_private )) { + on->on_bi.bi_private = ap->ap_next; + ch_free( ap ); + } + } else { + adpair **app, *ap; + int i; + app = (adpair **)&on->on_bi.bi_private; + for (i=0; i<=c->valx; i++, app = &ap->ap_next) { + ap = *app; + } + *app = ap->ap_next; + ch_free( ap ); + } + rc = 0; + break; + case SLAP_CONFIG_ADD: + case LDAP_MOD_ADD: + { + adpair ap = { NULL, NULL, NULL }, *a2; + const char *text; + if ( slap_str2ad( c->argv[1], &ap.ap_mem, &text ) ) { + snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s attribute description unknown: \"%s\"", + c->argv[0], c->argv[1] ); + Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, + "%s: %s\n", c->log, c->cr_msg, 0 ); + return ARG_BAD_CONF; + } + if ( slap_str2ad( c->argv[2], &ap.ap_uri, &text ) ) { + snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s attribute description unknown: \"%s\"", + c->argv[0], c->argv[2] ); + Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, + "%s: %s\n", c->log, c->cr_msg, 0 ); + return ARG_BAD_CONF; + } + /* The on->on_bi.bi_private pointer can be used for + * anything this instance of the overlay needs. + */ + a2 = ch_malloc( sizeof(adpair) ); + a2->ap_next = on->on_bi.bi_private; + a2->ap_mem = ap.ap_mem; + a2->ap_uri = ap.ap_uri; + on->on_bi.bi_private = a2; + rc = 0; + } + } + return rc; +} + +static ConfigTable dgroupcfg[] = { + { "attrpair", "member-attribute> <URL-attribute", 3, 3, 0, + ARG_MAGIC, dgroup_cf, + "( OLcfgOvAt:17.1 NAME 'olcDGAttrPair' " + "DESC 'Member and MemberURL attribute pair' " + "SYNTAX OMsDirectoryString )", NULL, NULL }, + { NULL, NULL, 0, 0, 0, ARG_IGNORED } +}; + +static ConfigOCs dgroupocs[] = { + { "( OLcfgOvOc:17.1 " + "NAME 'olcDGConfig' " + "DESC 'Dynamic Group configuration' " + "SUP olcOverlayConfig " + "MAY olcDGAttrPair )", + Cft_Overlay, dgroupcfg }, + { NULL, 0, NULL } +}; + +static int +dyngroup_response( Operation *op, SlapReply *rs ) +{ + slap_overinst *on = (slap_overinst *) op->o_bd->bd_info; + adpair *ap = on->on_bi.bi_private; + + /* If we've been configured and the current response is + * what we're looking for... + */ + if ( ap && op->o_tag == LDAP_REQ_COMPARE && + rs->sr_err == LDAP_NO_SUCH_ATTRIBUTE ) { + + for (;ap;ap=ap->ap_next) { + if ( op->oq_compare.rs_ava->aa_desc == ap->ap_mem ) { + /* This compare is for one of the attributes we're + * interested in. We'll use slapd's existing dyngroup + * evaluator to get the answer we want. + */ + int cache = op->o_do_not_cache; + + op->o_do_not_cache = 1; + rs->sr_err = backend_group( op, NULL, &op->o_req_ndn, + &op->oq_compare.rs_ava->aa_value, NULL, ap->ap_uri ); + op->o_do_not_cache = cache; + switch ( rs->sr_err ) { + case LDAP_SUCCESS: + rs->sr_err = LDAP_COMPARE_TRUE; + break; + + case LDAP_NO_SUCH_OBJECT: + rs->sr_err = LDAP_COMPARE_FALSE; + break; + } + break; + } + } + } + /* Default is to just fall through to the normal processing */ + return SLAP_CB_CONTINUE; +} + +static int +dyngroup_destroy( + BackendDB *be, + ConfigReply *cr +) +{ + slap_overinst *on = (slap_overinst *) be->bd_info; + adpair *ap, *a2; + + for ( ap = on->on_bi.bi_private; ap; ap = a2 ) { + a2 = ap->ap_next; + ch_free( ap ); + } + return 0; +} + +static slap_overinst dyngroup; + +/* This overlay is set up for dynamic loading via moduleload. For static + * configuration, you'll need to arrange for the slap_overinst to be + * initialized and registered by some other function inside slapd. + */ + +int dyngroup_initialize() { + int code; + + dyngroup.on_bi.bi_type = "dyngroup"; + dyngroup.on_bi.bi_db_destroy = dyngroup_destroy; + dyngroup.on_response = dyngroup_response; + + dyngroup.on_bi.bi_cf_ocs = dgroupocs; + code = config_register_schema( dgroupcfg, dgroupocs ); + if ( code ) return code; + + return overlay_register( &dyngroup ); +} + +#if SLAPD_OVER_DYNGROUP == SLAPD_MOD_DYNAMIC +int +init_module( int argc, char *argv[] ) +{ + return dyngroup_initialize(); +} +#endif + +#endif /* defined(SLAPD_OVER_DYNGROUP) */ |