#include "slap.h"
#include "back-relay.h"
-#define RB_ERR_MASK (0x0000FFFFU)
-#define RB_ERR (0x10000000U)
-#define RB_UNSUPPORTED_FLAG (0x20000000U)
-#define RB_REFERRAL (0x40000000U)
-#define RB_SEND (0x80000000U)
-#define RB_UNSUPPORTED (LDAP_UNWILLING_TO_PERFORM|RB_ERR|RB_UNSUPPORTED_FLAG)
-#define RB_UNSUPPORTED_SEND (RB_UNSUPPORTED|RB_SEND)
-#define RB_REFERRAL_SEND (RB_REFERRAL|RB_SEND)
-#define RB_ERR_SEND (RB_ERR|RB_SEND)
-#define RB_ERR_REFERRAL_SEND (RB_ERR|RB_REFERRAL|RB_SEND)
+/* Results when no real database (.rf_bd) or operation handler (.rf_op) */
+static const struct relay_fail_modes_s {
+ slap_mask_t rf_bd, rf_op;
+#define RB_ERR_MASK 0x0000FFFFU /* bitmask for default return value */
+#define RB_BDERR 0x80000000U /* use .rf_bd's default return value */
+#define RB_OPERR 0x40000000U /* set rs->sr_err = .rf_op return value */
+#define RB_REF 0x20000000U /* use default_referral if available */
+#define RB_SEND 0x10000000U /* send result; RB_??ERR is also set */
+#define RB_SENDREF 0/*unused*/ /* like RB_SEND when referral found */
+#define RB_NO_BIND (RB_OPERR | LDAP_INVALID_CREDENTIALS)
+#define RB_NOT_SUPP (RB_OPERR | LDAP_UNWILLING_TO_PERFORM)
+#define RB_NO_OBJ (RB_REF | LDAP_NO_SUCH_OBJECT)
+#define RB_CHK_REF (RB_REF | RB_SENDREF | LDAP_SUCCESS)
+} relay_fail_modes[relay_op_last] = {
+ /* .rf_bd is unused when zero, otherwise both fields have RB_BDERR */
+# define RB_OP(b, o) { (b) | RB_BD2ERR(b), (o) | RB_BD2ERR(b) }
+# define RB_BD2ERR(b) ((b) ? RB_BDERR : 0)
+ /* indexed by slap_operation_t: */
+ RB_OP(RB_NO_BIND|RB_SEND, RB_NO_BIND |RB_SEND), /* Bind */
+ RB_OP(0, LDAP_SUCCESS), /* Unbind: unused */
+ RB_OP(RB_NO_OBJ |RB_SEND, RB_NOT_SUPP |RB_SEND), /* Search */
+ RB_OP(RB_NO_OBJ |RB_SEND, SLAP_CB_CONTINUE), /* Compare */
+ RB_OP(RB_NO_OBJ |RB_SEND, RB_NOT_SUPP |RB_SEND), /* Modify */
+ RB_OP(RB_NO_OBJ |RB_SEND, RB_NOT_SUPP |RB_SEND), /* Modrdn */
+ RB_OP(RB_NO_OBJ |RB_SEND, RB_NOT_SUPP |RB_SEND), /* Add */
+ RB_OP(RB_NO_OBJ |RB_SEND, RB_NOT_SUPP |RB_SEND), /* Delete */
+ RB_OP(0, LDAP_SUCCESS), /* Abandon:unused */
+ RB_OP(RB_NO_OBJ, RB_NOT_SUPP), /* Extended */
+ RB_OP(0, SLAP_CB_CONTINUE), /* Cancel: unused */
+ RB_OP(0, LDAP_SUCCESS), /* operational */
+ RB_OP(RB_CHK_REF, LDAP_SUCCESS), /* chk_referrals:unused*/
+ RB_OP(0, SLAP_CB_CONTINUE),/* chk_controls:unused */
+ /* additional relay_operation_t indexes from back-relay.h: */
+ RB_OP(0, 0/*unused*/), /* entry_get = op_last */
+ RB_OP(0, 0/*unused*/), /* entry_release */
+ RB_OP(0, 0/*unused*/), /* has_subordinates */
+};
+/*
+ * Callbacks: Caller set op->o_bd to underlying BackendDB and sc_private
+ * to Relay BackendDB. sc_response swaps them, sc_cleanup swaps them back.
+ */
static int
relay_back_swap_bd( Operation *op, SlapReply *rs )
{
}
/*
- * selects the backend if not enforced at config;
- * in case of failure, behaves based on err:
- * -1 don't send result
- * LDAP_SUCCESS don't send result; may send referral if dosend
- * any valid error send as error result if dosend
+ * Select the backend database with the operation's DN. On failure,
+ * set/send results depending on operation type <which>'s fail_modes.
*/
static BackendDB *
-relay_back_select_backend( Operation *op, SlapReply *rs, slap_mask_t fail_mode )
+relay_back_select_backend( Operation *op, SlapReply *rs, int which )
{
- relay_back_info *ri = (relay_back_info *)op->o_bd->be_private;
- BackendDB *bd = ri->ri_bd;
- int rc = ( fail_mode & RB_ERR_MASK );
+ OpExtra *oex;
+ char *key = (char *) op->o_bd->be_private;
+ BackendDB *bd = ((relay_back_info *) key)->ri_bd;
+ slap_mask_t fail_mode = relay_fail_modes[which].rf_bd;
+ int useDN = 0, rc = ( fail_mode & RB_ERR_MASK );
if ( bd == NULL && !BER_BVISNULL( &op->o_req_ndn ) ) {
+ useDN = 1;
bd = select_backend( &op->o_req_ndn, 1 );
- if ( bd->be_private == op->o_bd->be_private ) {
- Debug( LDAP_DEBUG_ANY,
- "%s: back-relay for DN=\"%s\" would call self.\n",
- op->o_log_prefix, op->o_req_dn.bv_val, 0 );
- if ( fail_mode & RB_ERR ) {
- rs->sr_err = rc;
- if ( fail_mode & RB_SEND ) {
- send_ldap_result( op, rs );
- }
- }
-
- return NULL;
- }
}
- if ( bd == NULL ) {
- if ( ( fail_mode & RB_REFERRAL )
- && ( fail_mode & RB_SEND )
- && !BER_BVISNULL( &op->o_req_ndn )
- && default_referral )
- {
- rs->sr_err = LDAP_REFERRAL;
-
- /* if we set sr_err to LDAP_REFERRAL,
- * we must provide one */
- rs->sr_ref = referral_rewrite(
- default_referral,
- NULL, &op->o_req_dn,
- LDAP_SCOPE_DEFAULT );
- if ( !rs->sr_ref ) {
- rs->sr_ref = default_referral;
- }
-
- send_ldap_result( op, rs );
-
- if ( rs->sr_ref != default_referral ) {
- ber_bvarray_free( rs->sr_ref );
- }
+ if ( bd != NULL ) {
+ key += which; /* <relay, op type> key from RELAY_WRAP_OP() */
+ LDAP_SLIST_FOREACH( oex, &op->o_extra, oe_next ) {
+ if ( oex->oe_key == key )
+ break;
+ }
+ if ( oex == NULL ) {
+ return bd;
+ }
- return NULL;
+ bd = NULL;
+ Debug( LDAP_DEBUG_ANY,
+ "%s: back-relay for DN=\"%s\" would call self.\n",
+ op->o_log_prefix, op->o_req_dn.bv_val, 0 );
+
+ } else if ( useDN && ( fail_mode & RB_REF ) && default_referral ) {
+ rc = LDAP_REFERRAL;
+
+ /* if we set sr_err to LDAP_REFERRAL, we must provide one */
+ rs->sr_ref = referral_rewrite(
+ default_referral, NULL, &op->o_req_dn,
+ op->o_tag == LDAP_REQ_SEARCH ?
+ op->ors_scope : LDAP_SCOPE_DEFAULT );
+ if ( rs->sr_ref != NULL ) {
+ rs->sr_flags |= REP_REF_MUSTBEFREED;
+ } else {
+ rs->sr_ref = default_referral;
}
- /* NOTE: err is LDAP_INVALID_CREDENTIALS for bind,
- * LDAP_NO_SUCH_OBJECT for other operations.
- * noSuchObject cannot be returned by bind */
+ if ( fail_mode & RB_SENDREF )
+ fail_mode = (RB_BDERR | RB_SEND);
+ }
+
+ if ( fail_mode & RB_BDERR ) {
rs->sr_err = rc;
if ( fail_mode & RB_SEND ) {
send_ldap_result( op, rs );
}
}
- return bd;
+ return NULL;
}
+/*
+ * Forward <act> on <op> to database <bd>, with <relay, op type>-specific
+ * key in op->o_extra so relay_back_select_backend() can catch recursion.
+ */
+#define RELAY_WRAP_OP( op, bd, which, act ) { \
+ OpExtraDB wrap_oex; \
+ BackendDB *const wrap_bd = (op)->o_bd; \
+ wrap_oex.oe_db = wrap_bd; \
+ wrap_oex.oe.oe_key = (char *) wrap_bd->be_private + (which); \
+ LDAP_SLIST_INSERT_HEAD( &(op)->o_extra, &wrap_oex.oe, oe_next ); \
+ (op)->o_bd = (bd); \
+ act; \
+ (op)->o_bd = wrap_bd; \
+ LDAP_SLIST_REMOVE( &(op)->o_extra, &wrap_oex.oe, OpExtra, oe_next ); \
+}
+
+/*
+ * Forward backend function #<which> on <op> to operation DN's database
+ * like RELAY_WRAP_OP, after setting up callbacks. If no database or no
+ * backend function, set/send results depending on <which>'s fail_modes.
+ */
static int
-relay_back_op(
- Operation *op,
- SlapReply *rs,
- BackendDB *bd,
- BI_op_func *func,
- slap_mask_t fail_mode )
+relay_back_op( Operation *op, SlapReply *rs, int which )
{
- int rc = ( fail_mode & RB_ERR_MASK );
+ BackendDB *bd;
+ BI_op_bind *func;
+ slap_mask_t fail_mode = relay_fail_modes[which].rf_op;
+ int rc = ( fail_mode & RB_ERR_MASK );
+
+ bd = relay_back_select_backend( op, rs, which );
+ if ( bd == NULL ) {
+ if ( fail_mode & RB_BDERR )
+ return rs->sr_err; /* sr_err was set above */
- if ( func ) {
- BackendDB *be = op->o_bd;
+ } else if ( (func = (&bd->be_bind)[which]) != 0 ) {
slap_callback cb;
relay_back_add_cb( &cb, op );
- op->o_bd = bd;
- rc = func( op, rs );
- op->o_bd = be;
+ RELAY_WRAP_OP( op, bd, which, {
+ rc = func( op, rs );
+ });
if ( op->o_callback == &cb ) {
op->o_callback = op->o_callback->sc_next;
}
- } else if ( fail_mode & RB_ERR ) {
+ } else if ( fail_mode & RB_OPERR ) {
rs->sr_err = rc;
- if ( fail_mode & RB_UNSUPPORTED_FLAG ) {
+ if ( rc == LDAP_UNWILLING_TO_PERFORM ) {
rs->sr_text = "operation not supported within naming context";
}
return rc;
}
+
int
relay_back_op_bind( Operation *op, SlapReply *rs )
{
- BackendDB *bd;
-
/* allow rootdn as a means to auth without the need to actually
* contact the proxied DSA */
switch ( be_rootdn_bind( op, rs ) ) {
return rs->sr_err;
}
- bd = relay_back_select_backend( op, rs,
- ( LDAP_INVALID_CREDENTIALS | RB_ERR_SEND ) );
- if ( bd == NULL ) {
- return rs->sr_err;
- }
-
- return relay_back_op( op, rs, bd, bd->be_bind,
- ( LDAP_INVALID_CREDENTIALS | RB_ERR_SEND ) );
-}
-
-int
-relay_back_op_unbind( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs, 0 );
- if ( bd != NULL ) {
- (void)relay_back_op( op, rs, bd, bd->be_unbind, 0 );
- }
-
- return 0;
-}
-
-int
-relay_back_op_search( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_NO_SUCH_OBJECT | RB_ERR_REFERRAL_SEND ) );
- if ( bd == NULL ) {
- return rs->sr_err;
- }
-
- return relay_back_op( op, rs, bd, bd->be_search,
- RB_UNSUPPORTED_SEND );
+ return relay_back_op( op, rs, op_bind );
}
-int
-relay_back_op_compare( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_NO_SUCH_OBJECT | RB_ERR_REFERRAL_SEND ) );
- if ( bd == NULL ) {
- return rs->sr_err;
- }
-
- return relay_back_op( op, rs, bd, bd->be_compare,
- ( SLAP_CB_CONTINUE | RB_ERR ) );
-}
-
-int
-relay_back_op_modify( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_NO_SUCH_OBJECT | RB_ERR_REFERRAL_SEND ) );
- if ( bd == NULL ) {
- return rs->sr_err;
- }
-
- return relay_back_op( op, rs, bd, bd->be_modify,
- RB_UNSUPPORTED_SEND );
-}
-
-int
-relay_back_op_modrdn( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_NO_SUCH_OBJECT | RB_ERR_REFERRAL_SEND ) );
- if ( bd == NULL ) {
- return rs->sr_err;
- }
-
- return relay_back_op( op, rs, bd, bd->be_modrdn,
- RB_UNSUPPORTED_SEND );
-}
-
-int
-relay_back_op_add( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_NO_SUCH_OBJECT | RB_ERR_REFERRAL_SEND ) );
- if ( bd == NULL ) {
- return rs->sr_err;
- }
-
- return relay_back_op( op, rs, bd, bd->be_add,
- RB_UNSUPPORTED_SEND );
-}
-
-int
-relay_back_op_delete( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_NO_SUCH_OBJECT | RB_ERR_REFERRAL_SEND ) );
- if ( bd == NULL ) {
- return rs->sr_err;
- }
-
- return relay_back_op( op, rs, bd, bd->be_delete,
- RB_UNSUPPORTED_SEND );
-}
-
-int
-relay_back_op_abandon( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs, 0 );
- if ( bd == NULL ) {
- return rs->sr_err;
- }
-
- return relay_back_op( op, rs, bd, bd->be_abandon, 0 );
-}
-
-int
-relay_back_op_cancel( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
- int rc;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_CANNOT_CANCEL | RB_ERR ) );
- if ( bd == NULL ) {
- if ( op->o_cancel == SLAP_CANCEL_REQ ) {
- op->o_cancel = LDAP_CANNOT_CANCEL;
- }
- return rs->sr_err;
- }
-
- rc = relay_back_op( op, rs, bd, bd->be_cancel,
- ( LDAP_CANNOT_CANCEL | RB_ERR ) );
- if ( rc == LDAP_CANNOT_CANCEL && op->o_cancel == SLAP_CANCEL_REQ )
- {
- op->o_cancel = LDAP_CANNOT_CANCEL;
- }
-
- return rc;
-}
-
-int
-relay_back_op_extended( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_NO_SUCH_OBJECT | RB_ERR | RB_REFERRAL ) );
- if ( bd == NULL ) {
- return rs->sr_err;
- }
+#define RELAY_DEFOP(func, which) \
+ int func( Operation *op, SlapReply *rs ) \
+ { return relay_back_op( op, rs, which ); }
+
+RELAY_DEFOP( relay_back_op_search, op_search )
+RELAY_DEFOP( relay_back_op_compare, op_compare )
+RELAY_DEFOP( relay_back_op_modify, op_modify )
+RELAY_DEFOP( relay_back_op_modrdn, op_modrdn )
+RELAY_DEFOP( relay_back_op_add, op_add )
+RELAY_DEFOP( relay_back_op_delete, op_delete )
+RELAY_DEFOP( relay_back_op_extended, op_extended )
+RELAY_DEFOP( relay_back_operational, op_aux_operational )
+
+/* Abandon, Cancel, Unbind and some DN-less calls like be_connection_init
+ * need no extra handling: slapd already calls them for all databases.
+ */
- return relay_back_op( op, rs, bd, bd->be_extended,
- RB_UNSUPPORTED );
-}
int
relay_back_entry_release_rw( Operation *op, Entry *e, int rw )
{
- relay_back_info *ri = (relay_back_info *)op->o_bd->be_private;
BackendDB *bd;
- int rc = 1;
-
- bd = ri->ri_bd;
- if ( bd == NULL) {
- bd = select_backend( &op->o_req_ndn, 1 );
- if ( bd == NULL ) {
- return 1;
- }
- }
-
- if ( bd->be_release ) {
- BackendDB *be = op->o_bd;
-
- op->o_bd = bd;
- rc = bd->be_release( op, e, rw );
- op->o_bd = be;
+ int rc = LDAP_UNWILLING_TO_PERFORM;
+
+ bd = relay_back_select_backend( op, NULL, relay_op_entry_release );
+ if ( bd && bd->be_release ) {
+ RELAY_WRAP_OP( op, bd, relay_op_entry_release, {
+ rc = bd->be_release( op, e, rw );
+ });
+ } else if ( e->e_private == NULL ) {
+ entry_free( e );
+ rc = LDAP_SUCCESS;
}
return rc;
-
}
int
relay_back_entry_get_rw( Operation *op, struct berval *ndn,
ObjectClass *oc, AttributeDescription *at, int rw, Entry **e )
{
- relay_back_info *ri = (relay_back_info *)op->o_bd->be_private;
BackendDB *bd;
- int rc = 1;
-
- bd = ri->ri_bd;
- if ( bd == NULL) {
- bd = select_backend( &op->o_req_ndn, 1 );
- if ( bd == NULL ) {
- return 1;
- }
- }
-
- if ( bd->be_fetch ) {
- BackendDB *be = op->o_bd;
+ int rc = LDAP_NO_SUCH_OBJECT;
- op->o_bd = bd;
- rc = bd->be_fetch( op, ndn, oc, at, rw, e );
- op->o_bd = be;
+ bd = relay_back_select_backend( op, NULL, relay_op_entry_get );
+ if ( bd && bd->be_fetch ) {
+ RELAY_WRAP_OP( op, bd, relay_op_entry_get, {
+ rc = bd->be_fetch( op, ndn, oc, at, rw, e );
+ });
}
return rc;
-
}
+#if 0 /* Give the RB_SENDREF flag a nonzero value if implementing this */
/*
* NOTE: even the existence of this function is questionable: we cannot
* pass the bi_chk_referrals() call thru the rwm overlay because there
* is passing the target database a DN that likely does not belong to its
* naming context... mmmh.
*/
-int
-relay_back_chk_referrals( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_SUCCESS | RB_ERR_REFERRAL_SEND ) );
- /* FIXME: this test only works if there are no overlays, so
- * it is nearly useless; if made stricter, no nested back-relays
- * can be instantiated... too bad. */
- if ( bd == NULL || bd == op->o_bd ) {
- return 0;
- }
-
- /* no nested back-relays... */
- if ( overlay_is_over( bd ) ) {
- slap_overinfo *oi = (slap_overinfo *)bd->bd_info->bi_private;
-
- if ( oi->oi_orig == op->o_bd->bd_info ) {
- return 0;
- }
- }
-
- return relay_back_op( op, rs, bd, bd->be_chk_referrals, LDAP_SUCCESS );
-}
-
-int
-relay_back_operational( Operation *op, SlapReply *rs )
-{
- BackendDB *bd;
-
- bd = relay_back_select_backend( op, rs,
- ( LDAP_SUCCESS | RB_ERR ) );
- /* FIXME: this test only works if there are no overlays, so
- * it is nearly useless; if made stricter, no nested back-relays
- * can be instantiated... too bad. */
- if ( bd == NULL || bd == op->o_bd ) {
- return 0;
- }
-
- return relay_back_op( op, rs, bd, bd->be_operational, 0 );
-}
+RELAY_DEFOP( relay_back_chk_referrals, op_aux_chk_referrals )
+#endif /*0*/
int
relay_back_has_subordinates( Operation *op, Entry *e, int *hasSubs )
{
- SlapReply rs = { 0 };
BackendDB *bd;
int rc = LDAP_OTHER;
- bd = relay_back_select_backend( op, &rs, LDAP_OTHER );
- /* FIXME: this test only works if there are no overlays, so
- * it is nearly useless; if made stricter, no nested back-relays
- * can be instantiated... too bad. */
- if ( bd == NULL || bd == op->o_bd ) {
- return LDAP_OTHER;
- }
-
- if ( bd->be_has_subordinates ) {
- BackendDB *be = op->o_bd;
-
- op->o_bd = bd;
- rc = bd->be_has_subordinates( op, e, hasSubs );
- op->o_bd = be;
+ bd = relay_back_select_backend( op, NULL, relay_op_has_subordinates );
+ if ( bd && bd->be_has_subordinates ) {
+ RELAY_WRAP_OP( op, bd, relay_op_has_subordinates, {
+ rc = bd->be_has_subordinates( op, e, hasSubs );
+ });
}
return rc;
}
-int
-relay_back_connection_init( BackendDB *bd, Connection *c )
-{
- relay_back_info *ri = (relay_back_info *)bd->be_private;
-
- bd = ri->ri_bd;
- if ( bd == NULL ) {
- return 0;
- }
-
- if ( bd->be_connection_init ) {
- return bd->be_connection_init( bd, c );
- }
-
- return 0;
-}
-
-int
-relay_back_connection_destroy( BackendDB *bd, Connection *c )
-{
- relay_back_info *ri = (relay_back_info *)bd->be_private;
-
- bd = ri->ri_bd;
- if ( bd == NULL ) {
- return 0;
- }
-
- if ( bd->be_connection_destroy ) {
- return bd->be_connection_destroy( bd, c );
- }
-
- return 0;
-
-}
/*
* FIXME: must implement tools as well
projects / openldap / commitdiff