--- /dev/null
+/* backover.c - backend overlay routines */
+/* $OpenLDAP$ */
+/*
+ * Copyright 2003 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
+
+/*
+ * Functions to overlay other modules over a backend.
+ *
+ * -- Howard Chu
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#define SLAPD_TOOLS
+#include "slap.h"
+
+static slap_overinst *overlays;
+
+enum db_which { db_open = 0, db_close, db_destroy };
+
+static int
+over_db_func(
+ BackendDB *be,
+ enum db_which which
+)
+{
+ slap_overinfo *oi = (slap_overinfo *) be->bd_info;
+ slap_overinst *on = oi->oi_list;
+ BackendDB bd;
+ BI_db_open **func;
+ int rc = 0;
+
+ func = &oi->oi_bi.bi_db_open;
+ if ( func[which] ) {
+ rc = func[which]( &oi->oi_bd );
+ if ( rc ) return rc;
+ }
+
+ bd = *be;
+ for (; on; on=on->on_next) {
+ bd.bd_info = &on->on_bi;
+ func = &on->on_bi.bi_db_open;
+ if (func[which]) {
+ rc = func[which]( &bd );
+ if ( rc ) break;
+ }
+ }
+ return rc;
+}
+
+static int
+over_db_config(
+ BackendDB *be,
+ const char *fname,
+ int lineno,
+ int argc,
+ char **argv
+)
+{
+ slap_overinfo *oi = (slap_overinfo *) be->bd_info;
+ slap_overinst *on = oi->oi_list;
+ BackendDB bd;
+ int rc = 0;
+
+ if ( oi->oi_bi.bi_db_config ) {
+ rc = oi->oi_bi.bi_db_config( &oi->oi_bd, fname, lineno,
+ argc, argv );
+ if ( rc ) return rc;
+ }
+
+ bd = *be;
+ for (; on; on=on->on_next) {
+ bd.bd_info = &on->on_bi;
+ if (on->on_bi.bi_db_config) {
+ rc = on->on_bi.bi_db_config( &bd, fname, lineno,
+ argc, argv );
+ if ( rc ) break;
+ }
+ }
+ return rc;
+}
+
+static int
+over_db_open(
+ BackendDB *be
+)
+{
+ return over_db_func( be, db_open );
+}
+
+static int
+over_db_close(
+ BackendDB *be
+)
+{
+ return over_db_func( be, db_close );
+}
+
+static int
+over_db_destroy(
+ BackendDB *be
+)
+{
+ slap_overinfo *oi = (slap_overinfo *) be->bd_info;
+ slap_overinst *on = oi->oi_list, *next;
+ int rc;
+
+ rc = over_db_func( be, db_destroy );
+
+ for (next = on->on_next; on; on=next) {
+ next = on->on_next;
+ free( on );
+ }
+ free( oi );
+ return rc;
+}
+
+static int
+over_back_response ( Operation *op, SlapReply *rs )
+{
+ slap_overinfo *oi = (slap_overinfo *) op->o_bd->bd_info;
+ slap_overinst *on = oi->oi_list;
+ int rc = 0;
+ BackendDB *be = op->o_bd, db = *op->o_bd;
+
+ op->o_bd = &db;
+ for (; on; on=on->on_next ) {
+ if ( on->on_response ) {
+ db.bd_info = (BackendInfo *)on;
+ rc = on->on_response( op, rs );
+ if ( rc ) break;
+ }
+ }
+ op->o_bd = be;
+ return rc;
+}
+
+enum op_which { op_bind = 0, op_unbind, op_search, op_compare,
+ op_modify, op_modrdn, op_add, op_delete, op_abandon,
+ op_cancel, op_extended };
+
+static int
+over_op_func(
+ Operation *op,
+ SlapReply *rs,
+ enum op_which which
+)
+{
+ slap_overinfo *oi = (slap_overinfo *) op->o_bd->bd_info;
+ slap_overinst *on = oi->oi_list;
+ int rc = 0;
+ BackendDB *be = op->o_bd, db = *op->o_bd;
+ BI_op_bind **func;
+ slap_callback cb = {over_back_response, NULL};
+
+ op->o_bd = &db;
+ for (; on; on=on->on_next ) {
+ func = &on->on_bi.bi_op_bind;
+ if ( func[which] ) {
+ db.bd_info = (BackendInfo *)on;
+ rc = func[which]( op, rs );
+ if ( rc ) break;
+ }
+ }
+ func = &oi->oi_bi.bi_op_bind;
+ if ( func[which] ) {
+ rc = func[which]( op, rs );
+ }
+
+ op->o_bd = be;
+ return rc;
+}
+
+static int
+over_op_bind( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_bind );
+}
+
+static int
+over_op_unbind( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_unbind );
+}
+
+static int
+over_op_search( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_search );
+}
+
+static int
+over_op_compare( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_compare );
+}
+
+static int
+over_op_modify( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_modify );
+}
+
+static int
+over_op_modrdn( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_modrdn );
+}
+
+static int
+over_op_add( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_add );
+}
+
+static int
+over_op_delete( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_delete );
+}
+
+static int
+over_op_abandon( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_abandon );
+}
+
+static int
+over_op_cancel( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_cancel );
+}
+
+static int
+over_op_extended( Operation *op, SlapReply *rs )
+{
+ return over_op_func( op, rs, op_extended );
+}
+
+int
+overlay_register(
+ slap_overinst *on
+)
+{
+ on->on_next = overlays;
+ overlays = on;
+ return 0;
+}
+
+static const char overtype[] = "over";
+
+/* add an overlay to a particular backend. */
+int
+overlay_config( BackendDB *be, const char *ov )
+{
+ slap_overinst *on, *on2, *prev;
+ slap_overinfo *oi;
+ BackendInfo *bi;
+
+ for ( on = overlays; on; on=on->on_next ) {
+ if (!strcmp( ov, on->on_bi.bi_type ) )
+ break;
+ }
+ if (!on) {
+ Debug( LDAP_DEBUG_ANY, "overlay %s not found\n", ov, 0, 0 );
+ return 1;
+ }
+
+ if ( be->bd_info->bi_type != overtype ) {
+ oi = ch_malloc( sizeof(slap_overinfo) );
+ oi->oi_bd = *be;
+ oi->oi_bi = *be->bd_info;
+ oi->oi_list = NULL;
+ bi = (BackendInfo *)oi;
+
+ bi->bi_type = (char *)overtype;
+
+ bi->bi_db_config = over_db_config;
+ bi->bi_db_open = over_db_open;
+ bi->bi_db_close = over_db_close;
+ bi->bi_db_destroy = over_db_destroy;
+
+ bi->bi_op_bind = over_op_bind;
+ bi->bi_op_unbind = over_op_unbind;
+ bi->bi_op_search = over_op_search;
+ bi->bi_op_compare = over_op_compare;
+ bi->bi_op_modify = over_op_modify;
+ bi->bi_op_modrdn = over_op_modrdn;
+ bi->bi_op_add = over_op_add;
+ bi->bi_op_delete = over_op_delete;
+ bi->bi_op_abandon = over_op_abandon;
+ bi->bi_op_cancel = over_op_cancel;
+ bi->bi_extended = over_op_extended;
+
+ be->bd_info = bi;
+ }
+
+ oi = (slap_overinfo *) be->bd_info;
+ for ( prev=NULL, on2 = oi->oi_list; on2; prev=on2, on2=on2->on_next );
+ on2 = ch_malloc( sizeof(slap_overinst) );
+ if ( !prev ) {
+ oi->oi_list = on2;
+ } else {
+ prev->on_next = on2;
+ }
+ *on2 = *on;
+
+ return 0;
+}
+
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