1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* driver.c Bus client (driver)
4 * Copyright (C) 2003 CodeFactory AB
5 * Copyright (C) 2003, 2004 Red Hat, Inc.
7 * Licensed under the Academic Free License version 2.1
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "activation.h"
26 #include "connection.h"
32 #include <dbus/dbus-string.h>
33 #include <dbus/dbus-internals.h>
36 static dbus_bool_t bus_driver_send_welcome_message (DBusConnection *connection,
37 DBusMessage *hello_message,
38 BusTransaction *transaction,
42 bus_driver_send_service_owner_changed (const char *service_name,
43 const char *old_owner,
44 const char *new_owner,
45 BusTransaction *transaction,
50 const char *null_service;
52 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
55 _dbus_verbose ("sending service owner changed: %s [%s -> %s]\n",
57 old_owner ? old_owner : null_service,
58 new_owner ? new_owner : null_service);
60 message = dbus_message_new_signal (DBUS_PATH_ORG_FREEDESKTOP_DBUS,
61 DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
62 "ServiceOwnerChanged");
70 if (!dbus_message_set_sender (message, DBUS_SERVICE_ORG_FREEDESKTOP_DBUS))
73 if (!dbus_message_append_args (message,
74 DBUS_TYPE_STRING, &service_name,
75 DBUS_TYPE_STRING, old_owner ? &old_owner : &null_service,
76 DBUS_TYPE_STRING, new_owner ? &new_owner : &null_service,
80 _dbus_assert (dbus_message_has_signature (message, "sss"));
82 retval = bus_dispatch_matches (transaction, NULL, NULL, message, error);
83 dbus_message_unref (message);
88 dbus_message_unref (message);
94 bus_driver_send_service_lost (DBusConnection *connection,
95 const char *service_name,
96 BusTransaction *transaction,
101 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
103 message = dbus_message_new_signal (DBUS_PATH_ORG_FREEDESKTOP_DBUS,
104 DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
113 if (!dbus_message_set_destination (message, bus_connection_get_name (connection)) ||
114 !dbus_message_append_args (message,
115 DBUS_TYPE_STRING, &service_name,
118 dbus_message_unref (message);
123 if (!bus_transaction_send_from_driver (transaction, connection, message))
125 dbus_message_unref (message);
131 dbus_message_unref (message);
137 bus_driver_send_service_acquired (DBusConnection *connection,
138 const char *service_name,
139 BusTransaction *transaction,
142 DBusMessage *message;
144 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
146 message = dbus_message_new_signal (DBUS_PATH_ORG_FREEDESKTOP_DBUS,
147 DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
156 if (!dbus_message_set_destination (message, bus_connection_get_name (connection)) ||
157 !dbus_message_append_args (message,
158 DBUS_TYPE_STRING, &service_name,
161 dbus_message_unref (message);
166 if (!bus_transaction_send_from_driver (transaction, connection, message))
168 dbus_message_unref (message);
174 dbus_message_unref (message);
180 create_unique_client_name (BusRegistry *registry,
183 /* We never want to use the same unique client name twice, because
184 * we want to guarantee that if you send a message to a given unique
185 * name, you always get the same application. So we use two numbers
186 * for INT_MAX * INT_MAX combinations, should be pretty safe against
189 /* FIXME these should be in BusRegistry rather than static vars */
190 static int next_major_number = 0;
191 static int next_minor_number = 0;
194 len = _dbus_string_get_length (str);
198 /* start out with 1-0, go to 1-1, 1-2, 1-3,
199 * up to 1-MAXINT, then 2-0, 2-1, etc.
201 if (next_minor_number <= 0)
203 next_major_number += 1;
204 next_minor_number = 0;
205 if (next_major_number <= 0)
206 _dbus_assert_not_reached ("INT_MAX * INT_MAX clients were added");
209 _dbus_assert (next_major_number > 0);
210 _dbus_assert (next_minor_number >= 0);
212 /* appname:MAJOR-MINOR */
214 if (!_dbus_string_append (str, ":"))
217 if (!_dbus_string_append_int (str, next_major_number))
220 if (!_dbus_string_append (str, "."))
223 if (!_dbus_string_append_int (str, next_minor_number))
226 next_minor_number += 1;
228 /* Check if a client with the name exists */
229 if (bus_registry_lookup (registry, str) == NULL)
232 /* drop the number again, try the next one. */
233 _dbus_string_set_length (str, len);
240 bus_driver_handle_hello (DBusConnection *connection,
241 BusTransaction *transaction,
242 DBusMessage *message,
245 DBusString unique_name;
248 BusRegistry *registry;
249 BusConnections *connections;
251 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
253 if (bus_connection_is_active (connection))
255 /* We already handled an Hello message for this connection. */
256 dbus_set_error (error, DBUS_ERROR_FAILED,
257 "Already handled an Hello message");
261 /* Note that when these limits are exceeded we don't disconnect the
262 * connection; we just sort of leave it hanging there until it times
263 * out or disconnects itself or is dropped due to the max number of
264 * incomplete connections. It's even OK if the connection wants to
265 * retry the hello message, we support that.
267 connections = bus_connection_get_connections (connection);
268 if (!bus_connections_check_limits (connections, connection,
271 _DBUS_ASSERT_ERROR_IS_SET (error);
275 if (!_dbus_string_init (&unique_name))
283 registry = bus_connection_get_registry (connection);
285 if (!create_unique_client_name (registry, &unique_name))
291 if (!bus_connection_complete (connection, &unique_name, error))
293 _DBUS_ASSERT_ERROR_IS_SET (error);
297 if (!dbus_message_set_sender (message,
298 bus_connection_get_name (connection)))
304 if (!bus_driver_send_welcome_message (connection, message, transaction, error))
307 /* Create the service */
308 service = bus_registry_ensure (registry,
309 &unique_name, connection, transaction, error);
313 bus_service_set_prohibit_replacement (service, TRUE);
315 _dbus_assert (bus_connection_is_active (connection));
319 _dbus_string_free (&unique_name);
324 bus_driver_send_welcome_message (DBusConnection *connection,
325 DBusMessage *hello_message,
326 BusTransaction *transaction,
329 DBusMessage *welcome;
332 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
334 name = bus_connection_get_name (connection);
335 _dbus_assert (name != NULL);
337 welcome = dbus_message_new_method_return (hello_message);
344 if (!dbus_message_append_args (welcome,
345 DBUS_TYPE_STRING, &name,
348 dbus_message_unref (welcome);
353 _dbus_assert (dbus_message_has_signature (welcome, "s"));
355 if (!bus_transaction_send_from_driver (transaction, connection, welcome))
357 dbus_message_unref (welcome);
363 dbus_message_unref (welcome);
369 bus_driver_handle_list_services (DBusConnection *connection,
370 BusTransaction *transaction,
371 DBusMessage *message,
377 BusRegistry *registry;
379 DBusMessageIter iter;
382 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
384 registry = bus_connection_get_registry (connection);
386 reply = dbus_message_new_method_return (message);
393 if (!bus_registry_list_services (registry, &services, &len))
395 dbus_message_unref (reply);
400 dbus_message_append_iter_init (reply, &iter);
402 if (!dbus_message_iter_open_container (&iter, DBUS_TYPE_ARRAY,
403 DBUS_TYPE_STRING_AS_STRING,
406 dbus_free_string_array (services);
407 dbus_message_unref (reply);
415 if (!dbus_message_iter_append_basic (&sub, DBUS_TYPE_STRING,
418 dbus_free_string_array (services);
419 dbus_message_unref (reply);
426 if (!dbus_message_iter_close_container (&iter, &sub))
428 dbus_free_string_array (services);
429 dbus_message_unref (reply);
434 dbus_free_string_array (services);
436 if (!bus_transaction_send_from_driver (transaction, connection, reply))
438 dbus_message_unref (reply);
444 dbus_message_unref (reply);
450 bus_driver_handle_acquire_service (DBusConnection *connection,
451 BusTransaction *transaction,
452 DBusMessage *message,
456 DBusString service_name;
461 BusRegistry *registry;
463 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
465 registry = bus_connection_get_registry (connection);
467 if (!dbus_message_get_args (message, error,
468 DBUS_TYPE_STRING, &name,
469 DBUS_TYPE_UINT32, &flags,
473 _dbus_verbose ("Trying to own service %s with flags 0x%x\n", name, flags);
478 _dbus_string_init_const (&service_name, name);
480 if (!bus_registry_acquire_service (registry, connection,
481 &service_name, flags,
482 &service_reply, transaction,
486 reply = dbus_message_new_method_return (message);
493 if (!dbus_message_append_args (reply, DBUS_TYPE_UINT32, &service_reply, DBUS_TYPE_INVALID))
499 if (!bus_transaction_send_from_driver (transaction, connection, reply))
509 dbus_message_unref (reply);
514 bus_driver_handle_service_exists (DBusConnection *connection,
515 BusTransaction *transaction,
516 DBusMessage *message,
520 DBusString service_name;
522 unsigned char service_exists;
525 BusRegistry *registry;
527 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
529 registry = bus_connection_get_registry (connection);
531 if (!dbus_message_get_args (message, error,
532 DBUS_TYPE_STRING, &name,
538 if (strcmp (name, DBUS_SERVICE_ORG_FREEDESKTOP_DBUS) == 0)
540 service_exists = TRUE;
544 _dbus_string_init_const (&service_name, name);
545 service = bus_registry_lookup (registry, &service_name);
546 service_exists = service != NULL;
549 reply = dbus_message_new_method_return (message);
556 if (!dbus_message_append_args (reply,
557 DBUS_TYPE_BOOLEAN, &service_exists,
564 if (!bus_transaction_send_from_driver (transaction, connection, reply))
574 dbus_message_unref (reply);
580 bus_driver_handle_activate_service (DBusConnection *connection,
581 BusTransaction *transaction,
582 DBusMessage *message,
588 BusActivation *activation;
590 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
592 activation = bus_connection_get_activation (connection);
594 if (!dbus_message_get_args (message, error,
595 DBUS_TYPE_STRING, &name,
596 DBUS_TYPE_UINT32, &flags,
599 _DBUS_ASSERT_ERROR_IS_SET (error);
600 _dbus_verbose ("No memory to get arguments to ActivateService\n");
606 if (!bus_activation_activate_service (activation, connection, transaction, FALSE,
607 message, name, error))
609 _DBUS_ASSERT_ERROR_IS_SET (error);
610 _dbus_verbose ("bus_activation_activate_service() failed\n");
621 send_ack_reply (DBusConnection *connection,
622 BusTransaction *transaction,
623 DBusMessage *message,
628 reply = dbus_message_new_method_return (message);
635 if (!bus_transaction_send_from_driver (transaction, connection, reply))
638 dbus_message_unref (reply);
642 dbus_message_unref (reply);
648 bus_driver_handle_add_match (DBusConnection *connection,
649 BusTransaction *transaction,
650 DBusMessage *message,
656 BusMatchmaker *matchmaker;
658 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
663 if (bus_connection_get_n_match_rules (connection) >=
664 bus_context_get_max_match_rules_per_connection (bus_transaction_get_context (transaction)))
666 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
667 "Connection \"%s\" is not allowed to add more match rules "
668 "(increase limits in configuration file if required)",
669 bus_connection_is_active (connection) ?
670 bus_connection_get_name (connection) :
675 if (!dbus_message_get_args (message, error,
676 DBUS_TYPE_STRING, &text,
679 _dbus_verbose ("No memory to get arguments to AddMatch\n");
683 _dbus_string_init_const (&str, text);
685 rule = bus_match_rule_parse (connection, &str, error);
689 matchmaker = bus_connection_get_matchmaker (connection);
691 if (!bus_matchmaker_add_rule (matchmaker, rule))
697 if (!send_ack_reply (connection, transaction,
700 bus_matchmaker_remove_rule (matchmaker, rule);
704 bus_match_rule_unref (rule);
709 _DBUS_ASSERT_ERROR_IS_SET (error);
711 bus_match_rule_unref (rule);
716 bus_driver_handle_remove_match (DBusConnection *connection,
717 BusTransaction *transaction,
718 DBusMessage *message,
724 BusMatchmaker *matchmaker;
726 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
731 if (!dbus_message_get_args (message, error,
732 DBUS_TYPE_STRING, &text,
735 _dbus_verbose ("No memory to get arguments to RemoveMatch\n");
739 _dbus_string_init_const (&str, text);
741 rule = bus_match_rule_parse (connection, &str, error);
745 /* Send the ack before we remove the rule, since the ack is undone
746 * on transaction cancel, but rule removal isn't.
748 if (!send_ack_reply (connection, transaction,
752 matchmaker = bus_connection_get_matchmaker (connection);
754 if (!bus_matchmaker_remove_rule_by_value (matchmaker, rule, error))
757 bus_match_rule_unref (rule);
762 _DBUS_ASSERT_ERROR_IS_SET (error);
764 bus_match_rule_unref (rule);
769 bus_driver_handle_get_service_owner (DBusConnection *connection,
770 BusTransaction *transaction,
771 DBusMessage *message,
775 const char *base_name;
777 BusRegistry *registry;
781 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
783 registry = bus_connection_get_registry (connection);
788 if (! dbus_message_get_args (message, error,
789 DBUS_TYPE_STRING, &text,
793 _dbus_string_init_const (&str, text);
794 service = bus_registry_lookup (registry, &str);
797 dbus_set_error (error,
798 DBUS_ERROR_SERVICE_HAS_NO_OWNER,
799 "Could not get owner of service '%s': no such service", text);
803 base_name = bus_connection_get_name (bus_service_get_primary_owner (service));
804 if (base_name == NULL)
806 dbus_set_error (error,
808 "Could not determine base service for '%s'", text);
811 _dbus_assert (*base_name == ':');
813 reply = dbus_message_new_method_return (message);
817 if (! dbus_message_append_args (reply,
818 DBUS_TYPE_STRING, &base_name,
822 if (! bus_transaction_send_from_driver (transaction, connection, reply))
825 dbus_message_unref (reply);
833 _DBUS_ASSERT_ERROR_IS_SET (error);
835 dbus_message_unref (reply);
840 bus_driver_handle_get_connection_unix_user (DBusConnection *connection,
841 BusTransaction *transaction,
842 DBusMessage *message,
847 BusRegistry *registry;
849 DBusConnection *conn;
854 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
856 registry = bus_connection_get_registry (connection);
861 if (! dbus_message_get_args (message, error,
862 DBUS_TYPE_STRING, &service,
866 _dbus_verbose ("asked for UID of connection %s\n", service);
868 _dbus_string_init_const (&str, service);
869 serv = bus_registry_lookup (registry, &str);
872 dbus_set_error (error,
873 DBUS_ERROR_SERVICE_HAS_NO_OWNER,
874 "Could not get owner of service '%s': no such service", service);
878 conn = bus_service_get_primary_owner (serv);
880 reply = dbus_message_new_method_return (message);
884 if (!dbus_connection_get_unix_user (conn, &uid))
886 dbus_set_error (error,
888 "Could not determine UID for '%s'", service);
893 if (! dbus_message_append_args (reply,
894 DBUS_TYPE_UINT32, &uid32,
898 if (! bus_transaction_send_from_driver (transaction, connection, reply))
901 dbus_message_unref (reply);
909 _DBUS_ASSERT_ERROR_IS_SET (error);
911 dbus_message_unref (reply);
916 bus_driver_handle_get_connection_unix_process_id (DBusConnection *connection,
917 BusTransaction *transaction,
918 DBusMessage *message,
923 BusRegistry *registry;
925 DBusConnection *conn;
930 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
932 registry = bus_connection_get_registry (connection);
937 if (! dbus_message_get_args (message, error,
938 DBUS_TYPE_STRING, &service,
942 _dbus_verbose ("asked for PID of connection %s\n", service);
944 _dbus_string_init_const (&str, service);
945 serv = bus_registry_lookup (registry, &str);
948 dbus_set_error (error,
949 DBUS_ERROR_SERVICE_HAS_NO_OWNER,
950 "Could not get owner of service '%s': no such service", service);
954 conn = bus_service_get_primary_owner (serv);
956 reply = dbus_message_new_method_return (message);
960 if (!dbus_connection_get_unix_process_id (conn, &pid))
962 dbus_set_error (error,
963 DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN,
964 "Could not determine PID for '%s'", service);
969 if (! dbus_message_append_args (reply,
970 DBUS_TYPE_UINT32, &pid32,
974 if (! bus_transaction_send_from_driver (transaction, connection, reply))
977 dbus_message_unref (reply);
985 _DBUS_ASSERT_ERROR_IS_SET (error);
987 dbus_message_unref (reply);
992 bus_driver_handle_reload_config (DBusConnection *connection,
993 BusTransaction *transaction,
994 DBusMessage *message,
1000 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1004 context = bus_connection_get_context (connection);
1005 if (!bus_context_reload_config (context, error))
1007 _DBUS_ASSERT_ERROR_IS_SET (error);
1017 /* For speed it might be useful to sort this in order of
1018 * frequency of use (but doesn't matter with only a few items
1024 dbus_bool_t (* handler) (DBusConnection *connection,
1025 BusTransaction *transaction,
1026 DBusMessage *message,
1028 } message_handlers[] = {
1029 { "AcquireService", bus_driver_handle_acquire_service },
1030 { "ActivateService", bus_driver_handle_activate_service },
1031 { "Hello", bus_driver_handle_hello },
1032 { "ServiceExists", bus_driver_handle_service_exists },
1033 { "ListServices", bus_driver_handle_list_services },
1034 { "AddMatch", bus_driver_handle_add_match },
1035 { "RemoveMatch", bus_driver_handle_remove_match },
1036 { "GetServiceOwner", bus_driver_handle_get_service_owner },
1037 { "GetConnectionUnixUser", bus_driver_handle_get_connection_unix_user },
1038 { "GetConnectionUnixProcessID", bus_driver_handle_get_connection_unix_process_id },
1039 { "ReloadConfig", bus_driver_handle_reload_config }
1043 bus_driver_handle_message (DBusConnection *connection,
1044 BusTransaction *transaction,
1045 DBusMessage *message,
1048 const char *name, *sender;
1051 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1053 if (dbus_message_get_type (message) != DBUS_MESSAGE_TYPE_METHOD_CALL)
1055 _dbus_verbose ("Driver got a non-method-call message, ignoring\n");
1056 return TRUE; /* we just ignore this */
1059 _dbus_assert (dbus_message_get_interface (message) != NULL);
1060 _dbus_assert (dbus_message_get_member (message) != NULL);
1062 name = dbus_message_get_member (message);
1063 sender = dbus_message_get_sender (message);
1065 if (strcmp (dbus_message_get_interface (message),
1066 DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS) != 0)
1068 _dbus_verbose ("Driver got message to unknown interface \"%s\"\n",
1069 dbus_message_get_interface (message));
1073 _dbus_verbose ("Driver got a method call: %s\n",
1074 dbus_message_get_member (message));
1076 /* security checks should have kept this from getting here */
1077 _dbus_assert (sender != NULL || strcmp (name, "Hello") == 0);
1079 if (dbus_message_get_reply_serial (message) != 0)
1081 _dbus_verbose ("Client sent a reply to the bus driver, ignoring it\n");
1086 while (i < _DBUS_N_ELEMENTS (message_handlers))
1088 if (strcmp (message_handlers[i].name, name) == 0)
1090 _dbus_verbose ("Running driver handler for %s\n", name);
1091 if ((* message_handlers[i].handler) (connection, transaction, message, error))
1093 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1094 _dbus_verbose ("Driver handler succeeded\n");
1099 _DBUS_ASSERT_ERROR_IS_SET (error);
1100 _dbus_verbose ("Driver handler returned failure\n");
1109 _dbus_verbose ("No driver handler for message \"%s\"\n",
1112 dbus_set_error (error, DBUS_ERROR_UNKNOWN_METHOD,
1113 "%s does not understand message %s",
1114 DBUS_SERVICE_ORG_FREEDESKTOP_DBUS, name);
1120 bus_driver_remove_connection (DBusConnection *connection)
1122 /* FIXME Does nothing for now, should unregister the connection
1123 * with the bus driver.