X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Fresult.c;h=9384b591dcd095e23015407bb5f1fb239b8852f4;hb=18beda81a0e6b476afbef81e5fd676804142ca32;hp=2636d51d6b769a522bd34763233437f9d14e70ae;hpb=5e3820fd7ae244e6df08aeff172e6902dee9356d;p=openldap

diff --git a/servers/slapd/result.c b/servers/slapd/result.c
index 2636d51d6b..9384b591dc 100644
--- a/servers/slapd/result.c
+++ b/servers/slapd/result.c
@@ -2,7 +2,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1998-2005 The OpenLDAP Foundation.
+ * Copyright 1998-2006 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -286,6 +286,144 @@ send_ldap_controls( Operation *o, BerElement *ber, LDAPControl **c )
 	return rc;
 }
 
+/*
+ * slap_response_play()
+ *
+ * plays the callback list; rationale: a callback can
+ *   - remove itself from the list, by setting op->o_callback = NULL;
+ *     malloc()'ed callbacks should free themselves from inside the
+ *     sc_response() function.
+ *   - replace itself with another (list of) callback(s), by setting
+ *     op->o_callback = a new (list of) callback(s); in this case, it
+ *     is the callback's responsibility to to append existing subsequent
+ *     callbacks to the end of the list that is passed to the sc_response()
+ *     function.
+ *   - modify the list of subsequent callbacks by modifying the value
+ *     of the sc_next field from inside the sc_response() function; this
+ *     case does not require any handling from inside slap_response_play()
+ *
+ * To stop execution of the playlist, the sc_response() function must return
+ * a value different from SLAP_SC_CONTINUE.
+ *
+ * The same applies to slap_cleanup_play(); only, there is no means to stop
+ * execution of the playlist, since all cleanup functions must be called.
+ */
+static int
+slap_response_play(
+	Operation *op,
+	SlapReply *rs )
+{
+	int rc;
+
+#ifdef NEW_CB
+	slap_callback	*sc = op->o_callback, **scp;
+
+	rc = SLAP_CB_CONTINUE;
+	for ( scp = &sc; *scp; ) {
+		slap_callback *sc_next = (*scp)->sc_next, **sc_nextp = &(*scp)->sc_next;
+
+		op->o_callback = *scp;
+		if ( op->o_callback->sc_response ) {
+			rc = op->o_callback->sc_response( op, rs );
+			if ( op->o_callback == NULL ) {
+				/* the callback has been removed;
+				 * repair the list */
+				*scp = sc_next;
+				sc_nextp = scp;
+
+			} else if ( op->o_callback != *scp ) {
+				/* a new callback has been inserted
+				 * in place of the existing one; repair the list */
+				*scp = op->o_callback;
+				sc_nextp = scp;
+			}
+			if ( rc != SLAP_CB_CONTINUE ) break;
+		}
+		scp = sc_nextp;
+	}
+
+	op->o_callback = sc;
+#else /* ! NEW_CB */
+	slap_callback	*sc = op->o_callback, **sc_prev = &sc, *sc_next;
+
+	rc = SLAP_CB_CONTINUE;
+	for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
+		sc_next = op->o_callback->sc_next;
+		if ( op->o_callback->sc_response ) {
+			slap_callback *sc2 = op->o_callback;
+			rc = op->o_callback->sc_response( op, rs );
+			if ( op->o_callback != sc2 ) {
+				*sc_prev = op->o_callback;
+			}
+			if ( rc != SLAP_CB_CONTINUE || !op->o_callback ) break;
+			if ( op->o_callback != sc2 ) continue;
+		}
+		sc_prev = &op->o_callback->sc_next;
+	}
+
+	op->o_callback = sc;
+#endif /* ! NEW_CB */
+
+	return rc;
+}
+
+static int
+slap_cleanup_play(
+	Operation *op,
+	SlapReply *rs )
+{
+#ifdef NEW_CB
+	slap_callback	*sc = op->o_callback, **scp;
+
+	for ( scp = &sc; *scp; ) {
+		slap_callback *sc_next = (*scp)->sc_next, **sc_nextp = &(*scp)->sc_next;
+
+		op->o_callback = *scp;
+		if ( op->o_callback->sc_cleanup ) {
+			(void)op->o_callback->sc_cleanup( op, rs );
+			if ( op->o_callback == NULL ) {
+				/* the callback has been removed;
+				 * repair the list */
+				*scp = sc_next;
+				sc_nextp = scp;
+
+			} else if ( op->o_callback != *scp ) {
+				/* a new callback has been inserted
+				 * after the existing one; repair the list */
+				/* a new callback has been inserted
+				 * in place of the existing one; repair the list */
+				*scp = op->o_callback;
+				sc_nextp = scp;
+			}
+			/* don't care about the result; do all cleanup */
+		}
+		scp = sc_nextp;
+	}
+
+	op->o_callback = sc;
+#else /* ! NEW_CB */
+	slap_callback	*sc = op->o_callback, **sc_prev = &sc, *sc_next;
+
+	for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
+		sc_next = op->o_callback->sc_next;
+		if ( op->o_callback->sc_cleanup ) {
+			slap_callback *sc2 = op->o_callback;
+			(void)op->o_callback->sc_cleanup( op, rs );
+			if ( op->o_callback != sc2 ) {
+				*sc_prev = op->o_callback;
+			}
+			if ( !op->o_callback ) break;
+			if ( op->o_callback != sc2 ) continue;
+		}
+		sc_prev = &op->o_callback->sc_next;
+	}
+
+	op->o_callback = sc;
+#endif /* ! NEW_CB */
+
+	return LDAP_SUCCESS;
+}
+
 static int
 send_ldap_response(
 	Operation *op,
@@ -302,25 +440,10 @@ send_ldap_response(
 	}
 
 	if ( op->o_callback ) {
-		slap_callback	*sc = op->o_callback, **sc_prev = &sc, *sc_next;
-
-		rc = SLAP_CB_CONTINUE;
-		for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-			sc_next = op->o_callback->sc_next;
-			if ( op->o_callback->sc_response ) {
-				slap_callback *sc2 = op->o_callback;
-				rc = op->o_callback->sc_response( op, rs );
-				if ( op->o_callback != sc2 ) {
-					*sc_prev = op->o_callback;
-				}
-				if ( rc != SLAP_CB_CONTINUE || !op->o_callback ) break;
-				if ( op->o_callback != sc2 ) continue;
-			}
-			sc_prev = &op->o_callback->sc_next;
+		rc = slap_response_play( op, rs );
+		if ( rc != SLAP_CB_CONTINUE ) {
+			goto clean2;
 		}
-
-		op->o_callback = sc;
-		if ( rc != SLAP_CB_CONTINUE ) goto clean2;
 	}
 
 #ifdef LDAP_CONNECTIONLESS
@@ -458,25 +581,9 @@ cleanup:;
 
 clean2:;
 	if ( op->o_callback ) {
-		slap_callback	*sc = op->o_callback, **sc_prev = &sc, *sc_next;
-
-		for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-			sc_next = op->o_callback->sc_next;
-			if ( op->o_callback->sc_cleanup ) {
-				slap_callback *sc2 = op->o_callback;
-				(void)op->o_callback->sc_cleanup( op, rs );
-				if ( op->o_callback != sc2 ) {
-					*sc_prev = op->o_callback;
-				}
-				if ( !op->o_callback ) break;
-				if ( op->o_callback != sc2 ) continue;
-			}
-			sc_prev = &op->o_callback->sc_next;
-		}
-		op->o_callback = sc;
+		(void)slap_cleanup_play( op, rs );
 	}
 
-
 	if ( rs->sr_matched && rs->sr_flags & REP_MATCHED_MUSTBEFREED ) {
 		free( (char *)rs->sr_matched );
 		rs->sr_matched = NULL;
@@ -704,7 +811,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
 	/* NOTE: moved before overlays callback circling because
 	 * they may modify entry and other stuff in rs */
 	/* check for special all operational attributes ("+") type */
-	/* FIXME: maybe we could se this flag at the operation level;
+	/* FIXME: maybe we could set this flag at the operation level;
 	 * however, in principle the caller of send_search_entry() may
 	 * change the attribute list at each call */
 	rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
@@ -715,26 +822,10 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
 	}
 
 	if ( op->o_callback ) {
-		slap_callback	*sc = op->o_callback, **sc_prev = &sc, *sc_next;
-
-		rc = SLAP_CB_CONTINUE;
-		for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next )
-		{
-			sc_next = op->o_callback->sc_next;
-			if ( op->o_callback->sc_response ) {
-				slap_callback *sc2 = op->o_callback;
-				rc = op->o_callback->sc_response( op, rs );
-				if ( op->o_callback != sc2 ) {
-					*sc_prev = op->o_callback;
-				}
-				if ( rc != SLAP_CB_CONTINUE || !op->o_callback ) break;
-				if ( op->o_callback != sc2 ) continue;
-			}
-			sc_prev = &op->o_callback->sc_next;
+		rc = slap_response_play( op, rs );
+		if ( rc != SLAP_CB_CONTINUE ) {
+			goto error_return;
 		}
-
-		op->o_callback = sc;
-		if ( rc != SLAP_CB_CONTINUE ) goto error_return;
 	}
 
 	Debug( LDAP_DEBUG_TRACE, "=> send_search_entry: conn %lu dn=\"%s\"%s\n",
@@ -1173,22 +1264,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
 
 error_return:;
 	if ( op->o_callback ) {
-		slap_callback	*sc = op->o_callback, **sc_prev = &sc, *sc_next;
-
-		for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-			sc_next = op->o_callback->sc_next;
-			if ( op->o_callback->sc_cleanup ) {
-				slap_callback *sc2 = op->o_callback;
-				(void)op->o_callback->sc_cleanup( op, rs );
-				if ( op->o_callback != sc2 ) {
-					*sc_prev = op->o_callback;
-				}
-				if ( !op->o_callback ) break;
-				if ( op->o_callback != sc2 ) continue;
-			}
-			sc_prev = &op->o_callback->sc_next;
-		}
-		op->o_callback = sc;
+		(void)slap_cleanup_play( op, rs );
 	}
 
 	if ( e_flags ) {
@@ -1232,25 +1308,10 @@ slap_send_search_reference( Operation *op, SlapReply *rs )
 
 	rs->sr_type = REP_SEARCHREF;
 	if ( op->o_callback ) {
-		slap_callback	*sc = op->o_callback, **sc_prev = &sc, *sc_next;
-
-		rc = SLAP_CB_CONTINUE;
-		for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-			sc_next = op->o_callback->sc_next;
-			if ( op->o_callback->sc_response ) {
-				slap_callback *sc2 = op->o_callback;
-				rc = op->o_callback->sc_response( op, rs );
-				if ( op->o_callback != sc2 ) {
-					*sc_prev = op->o_callback;
-				}
-				if ( rc != SLAP_CB_CONTINUE || !op->o_callback ) break;
-				if ( op->o_callback != sc2 ) continue;
-			}
-			sc_prev = &op->o_callback->sc_next;
+		rc = slap_response_play( op, rs );
+		if ( rc != SLAP_CB_CONTINUE ) {
+			goto rel;
 		}
-
-		op->o_callback = sc;
-		if ( rc != SLAP_CB_CONTINUE ) goto rel;
 	}
 
 	Debug( LDAP_DEBUG_TRACE,
@@ -1376,22 +1437,7 @@ slap_send_search_reference( Operation *op, SlapReply *rs )
 
 rel:
 	if ( op->o_callback ) {
-		slap_callback	*sc = op->o_callback, **sc_prev = &sc, *sc_next;
-
-		for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-			sc_next = op->o_callback->sc_next;
-			if ( op->o_callback->sc_cleanup ) {
-				slap_callback *sc2 = op->o_callback;
-				(void)op->o_callback->sc_cleanup( op, rs );
-				if ( op->o_callback != sc2 ) {
-					*sc_prev = op->o_callback;
-				}
-				if ( rc != SLAP_CB_CONTINUE || !op->o_callback ) break;
-				if ( op->o_callback != sc2 ) continue;
-			}
-			sc_prev = &op->o_callback->sc_next;
-		}
-		op->o_callback = sc;
+		(void)slap_cleanup_play( op, rs );
 	}
 
 	return rc;
@@ -1484,6 +1530,7 @@ int slap_read_controls(
 	myop.o_bd = NULL;
 	myop.o_res_ber = ber;
 	myop.o_callback = NULL;
+	myop.ors_slimit = 1;
 
 	rc = slap_send_search_entry( &myop, rs );
 	if( rc ) return rc;