diff options
Diffstat (limited to 'contrib/slapd-modules/noopsrch/noopsrch.c')
| -rw-r--r-- | contrib/slapd-modules/noopsrch/noopsrch.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/contrib/slapd-modules/noopsrch/noopsrch.c b/contrib/slapd-modules/noopsrch/noopsrch.c new file mode 100644 index 0000000..57522ac --- /dev/null +++ b/contrib/slapd-modules/noopsrch/noopsrch.c @@ -0,0 +1,254 @@ +/* noopsrch.c - LDAP Control that counts entries a search would return */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2010-2021 The OpenLDAP Foundation. + * 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 Pierangelo Masarati for inclusion + * in OpenLDAP Software. + */ + +#include "portable.h" + +/* define SLAPD_OVER_NOOPSRCH=2 to build as run-time loadable module */ +#ifdef SLAPD_OVER_NOOPSRCH + +/* + * Control OID + */ +#define LDAP_CONTROL_X_NOOPSRCH "1.3.6.1.4.1.4203.666.5.18" + +#include "slap.h" +#include "ac/string.h" + +#define o_noopsrch o_ctrlflag[noopsrch_cid] +#define o_ctrlnoopsrch o_controls[noopsrch_cid] + +static int noopsrch_cid; +static slap_overinst noopsrch; + +static int +noopsrch_parseCtrl ( + Operation *op, + SlapReply *rs, + LDAPControl *ctrl ) +{ + if ( op->o_noopsrch != SLAP_CONTROL_NONE ) { + rs->sr_text = "No-op Search control specified multiple times"; + return LDAP_PROTOCOL_ERROR; + } + + if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) { + rs->sr_text = "No-op Search control value is present"; + return LDAP_PROTOCOL_ERROR; + } + + op->o_ctrlnoopsrch = (void *)NULL; + + op->o_noopsrch = ctrl->ldctl_iscritical + ? SLAP_CONTROL_CRITICAL + : SLAP_CONTROL_NONCRITICAL; + + rs->sr_err = LDAP_SUCCESS; + + return rs->sr_err; +} + +int dummy; + +typedef struct noopsrch_cb_t { + slap_overinst *nc_on; + ber_int_t nc_nentries; + ber_int_t nc_nsearchref; + AttributeName *nc_save_attrs; + int *nc_pdummy; + int nc_save_slimit; +} noopsrch_cb_t; + +static int +noopsrch_response( Operation *op, SlapReply *rs ) +{ + noopsrch_cb_t *nc = (noopsrch_cb_t *)op->o_callback->sc_private; + + /* if the control is global, limits are not computed yet */ + if ( nc->nc_pdummy == &dummy ) { + nc->nc_save_slimit = op->ors_slimit; + op->ors_slimit = SLAP_NO_LIMIT; + nc->nc_pdummy = NULL; + } + + if ( rs->sr_type == REP_SEARCH ) { + nc->nc_nentries++; +#ifdef NOOPSRCH_DEBUG + Debug( LDAP_DEBUG_TRACE, "noopsrch_response(REP_SEARCH): nentries=%d\n", nc->nc_nentries, 0, 0 ); +#endif + return 0; + + } else if ( rs->sr_type == REP_SEARCHREF ) { + nc->nc_nsearchref++; + return 0; + + } else if ( rs->sr_type == REP_RESULT ) { + BerElementBuffer berbuf; + BerElement *ber = (BerElement *) &berbuf; + struct berval ctrlval; + LDAPControl *ctrl, *ctrlsp[2]; + int rc = rs->sr_err; + + if ( nc->nc_save_slimit >= 0 && nc->nc_nentries >= nc->nc_save_slimit ) { + rc = LDAP_SIZELIMIT_EXCEEDED; + } + +#ifdef NOOPSRCH_DEBUG + Debug( LDAP_DEBUG_TRACE, "noopsrch_response(REP_RESULT): err=%d nentries=%d nref=%d\n", rc, nc->nc_nentries, nc->nc_nsearchref ); +#endif + + ber_init2( ber, NULL, LBER_USE_DER ); + + ber_printf( ber, "{iii}", rc, nc->nc_nentries, nc->nc_nsearchref ); + if ( ber_flatten2( ber, &ctrlval, 0 ) == -1 ) { + ber_free_buf( ber ); + if ( op->o_noopsrch == SLAP_CONTROL_CRITICAL ) { + return LDAP_CONSTRAINT_VIOLATION; + } + return SLAP_CB_CONTINUE; + } + + ctrl = op->o_tmpcalloc( 1, + sizeof( LDAPControl ) + ctrlval.bv_len + 1, + op->o_tmpmemctx ); + ctrl->ldctl_value.bv_val = (char *)&ctrl[ 1 ]; + ctrl->ldctl_oid = LDAP_CONTROL_X_NOOPSRCH; + ctrl->ldctl_iscritical = 0; + ctrl->ldctl_value.bv_len = ctrlval.bv_len; + AC_MEMCPY( ctrl->ldctl_value.bv_val, ctrlval.bv_val, ctrlval.bv_len ); + ctrl->ldctl_value.bv_val[ ctrl->ldctl_value.bv_len ] = '\0'; + + ber_free_buf( ber ); + + ctrlsp[0] = ctrl; + ctrlsp[1] = NULL; + slap_add_ctrls( op, rs, ctrlsp ); + } + return SLAP_CB_CONTINUE; +} + +static int +noopsrch_cleanup( Operation *op, SlapReply *rs ) +{ + if ( rs->sr_type == REP_RESULT || rs->sr_err == SLAPD_ABANDON ) { + noopsrch_cb_t *nc = (noopsrch_cb_t *)op->o_callback->sc_private; + op->ors_attrs = nc->nc_save_attrs; + if ( nc->nc_pdummy == NULL ) { + op->ors_slimit = nc->nc_save_slimit; + } + + op->o_tmpfree( op->o_callback, op->o_tmpmemctx ); + op->o_callback = NULL; + } + + return SLAP_CB_CONTINUE; +} + +static int +noopsrch_op_search( Operation *op, SlapReply *rs ) +{ + if ( op->o_noopsrch != SLAP_CONTROL_NONE ) { + slap_callback *sc; + noopsrch_cb_t *nc; + + sc = op->o_tmpcalloc( 1, sizeof( slap_callback ) + sizeof( noopsrch_cb_t ), op->o_tmpmemctx ); + + nc = (noopsrch_cb_t *)&sc[ 1 ]; + nc->nc_on = (slap_overinst *)op->o_bd->bd_info; + nc->nc_nentries = 0; + nc->nc_nsearchref = 0; + nc->nc_save_attrs = op->ors_attrs; + nc->nc_pdummy = &dummy; + + sc->sc_response = noopsrch_response; + sc->sc_cleanup = noopsrch_cleanup; + sc->sc_private = (void *)nc; + + op->ors_attrs = slap_anlist_no_attrs; + + sc->sc_next = op->o_callback->sc_next; + op->o_callback->sc_next = sc; + } + + return SLAP_CB_CONTINUE; +} + +static int noopsrch_cnt; + +static int +noopsrch_db_init( BackendDB *be, ConfigReply *cr) +{ + if ( noopsrch_cnt++ == 0 ) { + int rc; + + rc = register_supported_control( LDAP_CONTROL_X_NOOPSRCH, + SLAP_CTRL_SEARCH | SLAP_CTRL_GLOBAL_SEARCH, NULL, + noopsrch_parseCtrl, &noopsrch_cid ); + if ( rc != LDAP_SUCCESS ) { + Debug( LDAP_DEBUG_ANY, + "noopsrch_initialize: Failed to register control '%s' (%d)\n", + LDAP_CONTROL_X_NOOPSRCH, rc, 0 ); + return rc; + } + } + + return LDAP_SUCCESS; +} + +static int +noopsrch_db_destroy( BackendDB *be, ConfigReply *cr ) +{ + assert( noopsrch_cnt > 0 ); + +#ifdef SLAP_CONFIG_DELETE + overlay_unregister_control( be, LDAP_CONTROL_X_NOOPSRCH ); + if ( --noopsrch_cnt == 0 ) { + unregister_supported_control( LDAP_CONTROL_X_NOOPSRCH ); + } + +#endif /* SLAP_CONFIG_DELETE */ + + return 0; +} + +#if SLAPD_OVER_NOOPSRCH == SLAPD_MOD_DYNAMIC +static +#endif /* SLAPD_OVER_NOOPSRCH == SLAPD_MOD_DYNAMIC */ +int +noopsrch_initialize( void ) +{ + + noopsrch.on_bi.bi_type = "noopsrch"; + + noopsrch.on_bi.bi_db_init = noopsrch_db_init; + noopsrch.on_bi.bi_db_destroy = noopsrch_db_destroy; + noopsrch.on_bi.bi_op_search = noopsrch_op_search; + + return overlay_register( &noopsrch ); +} + +#if SLAPD_OVER_NOOPSRCH == SLAPD_MOD_DYNAMIC +int +init_module( int argc, char *argv[] ) +{ + return noopsrch_initialize(); +} +#endif /* SLAPD_OVER_NOOPSRCH == SLAPD_MOD_DYNAMIC */ + +#endif /* SLAPD_OVER_NOOPSRCH */ |