1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* driver.c Bus client (driver)
4 * Copyright (C) 2003 CodeFactory AB
5 * Copyright (C) 2003 Red Hat, Inc.
7 * Licensed under the Academic Free License version 1.2
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"
31 #include <dbus/dbus-string.h>
32 #include <dbus/dbus-internals.h>
35 static dbus_bool_t bus_driver_send_welcome_message (DBusConnection *connection,
36 DBusMessage *hello_message,
37 BusTransaction *transaction,
41 bus_driver_send_service_deleted (const char *service_name,
42 BusTransaction *transaction,
48 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
50 _dbus_verbose ("sending service deleted: %s\n", service_name);
52 message = dbus_message_new (DBUS_MESSAGE_SERVICE_DELETED,
53 DBUS_SERVICE_BROADCAST);
60 if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS) ||
61 !dbus_message_append_args (message,
62 DBUS_TYPE_STRING, service_name,
65 dbus_message_unref (message);
70 retval = bus_dispatch_broadcast_message (transaction, NULL, message, error);
71 dbus_message_unref (message);
77 bus_driver_send_service_created (const char *service_name,
78 BusTransaction *transaction,
84 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
86 message = dbus_message_new (DBUS_MESSAGE_SERVICE_CREATED,
87 DBUS_SERVICE_BROADCAST);
94 if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS))
96 dbus_message_unref (message);
101 if (!dbus_message_append_args (message,
102 DBUS_TYPE_STRING, service_name,
105 dbus_message_unref (message);
110 retval = bus_dispatch_broadcast_message (transaction, NULL, message, error);
111 dbus_message_unref (message);
117 bus_driver_send_service_lost (DBusConnection *connection,
118 const char *service_name,
119 BusTransaction *transaction,
122 DBusMessage *message;
124 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
126 message = dbus_message_new (DBUS_MESSAGE_SERVICE_LOST,
127 bus_connection_get_name (connection));
134 if (!dbus_message_append_args (message,
135 DBUS_TYPE_STRING, service_name,
138 dbus_message_unref (message);
143 if (!bus_transaction_send_from_driver (transaction, connection, message))
145 dbus_message_unref (message);
151 dbus_message_unref (message);
157 bus_driver_send_service_acquired (DBusConnection *connection,
158 const char *service_name,
159 BusTransaction *transaction,
162 DBusMessage *message;
164 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
166 message = dbus_message_new (DBUS_MESSAGE_SERVICE_ACQUIRED,
167 bus_connection_get_name (connection));
175 if (!dbus_message_append_args (message,
176 DBUS_TYPE_STRING, service_name,
179 dbus_message_unref (message);
184 if (!bus_transaction_send_from_driver (transaction, connection, message))
186 dbus_message_unref (message);
192 dbus_message_unref (message);
198 create_unique_client_name (BusRegistry *registry,
201 /* We never want to use the same unique client name twice, because
202 * we want to guarantee that if you send a message to a given unique
203 * name, you always get the same application. So we use two numbers
204 * for INT_MAX * INT_MAX combinations, should be pretty safe against
207 static int next_major_number = 0;
208 static int next_minor_number = 0;
211 len = _dbus_string_get_length (str);
215 /* start out with 1-0, go to 1-1, 1-2, 1-3,
216 * up to 1-MAXINT, then 2-0, 2-1, etc.
218 if (next_minor_number <= 0)
220 next_major_number += 1;
221 next_minor_number = 0;
222 if (next_major_number <= 0)
223 _dbus_assert_not_reached ("INT_MAX * INT_MAX clients were added");
226 _dbus_assert (next_major_number > 0);
227 _dbus_assert (next_minor_number >= 0);
229 /* appname:MAJOR-MINOR */
231 if (!_dbus_string_append (str, ":"))
234 if (!_dbus_string_append_int (str, next_major_number))
237 if (!_dbus_string_append (str, "-"))
240 if (!_dbus_string_append_int (str, next_minor_number))
243 next_minor_number += 1;
245 /* Check if a client with the name exists */
246 if (bus_registry_lookup (registry, str) == NULL)
249 /* drop the number again, try the next one. */
250 _dbus_string_set_length (str, len);
257 bus_driver_handle_hello (DBusConnection *connection,
258 BusTransaction *transaction,
259 DBusMessage *message,
262 DBusString unique_name;
265 BusRegistry *registry;
266 BusConnections *connections;
268 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
270 /* Note that when these limits are exceeded we don't disconnect the
271 * connection; we just sort of leave it hanging there until it times
272 * out or disconnects itself or is dropped due to the max number of
273 * incomplete connections. It's even OK if the connection wants to
274 * retry the hello message, we support that.
276 connections = bus_connection_get_connections (connection);
277 if (!bus_connections_check_limits (connections, connection,
280 _DBUS_ASSERT_ERROR_IS_SET (error);
284 if (!_dbus_string_init (&unique_name))
292 registry = bus_connection_get_registry (connection);
294 if (!create_unique_client_name (registry, &unique_name))
300 if (!bus_connection_set_name (connection, &unique_name))
306 if (!dbus_message_set_sender (message,
307 bus_connection_get_name (connection)))
313 if (!bus_driver_send_welcome_message (connection, message, transaction, error))
316 /* Create the service */
317 service = bus_registry_ensure (registry,
318 &unique_name, connection, transaction, error);
322 bus_service_set_prohibit_replacement (service, TRUE);
327 _dbus_string_free (&unique_name);
332 bus_driver_send_welcome_message (DBusConnection *connection,
333 DBusMessage *hello_message,
334 BusTransaction *transaction,
337 DBusMessage *welcome;
340 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
342 name = bus_connection_get_name (connection);
343 _dbus_assert (name != NULL);
345 welcome = dbus_message_new_reply (hello_message);
352 if (!dbus_message_append_args (welcome,
353 DBUS_TYPE_STRING, name,
356 dbus_message_unref (welcome);
361 if (!bus_transaction_send_from_driver (transaction, connection, welcome))
363 dbus_message_unref (welcome);
369 dbus_message_unref (welcome);
375 bus_driver_handle_list_services (DBusConnection *connection,
376 BusTransaction *transaction,
377 DBusMessage *message,
383 BusRegistry *registry;
385 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
387 registry = bus_connection_get_registry (connection);
389 reply = dbus_message_new_reply (message);
396 if (!bus_registry_list_services (registry, &services, &len))
398 dbus_message_unref (reply);
403 if (!dbus_message_append_args (reply,
404 DBUS_TYPE_ARRAY, DBUS_TYPE_STRING, services, len,
407 dbus_free_string_array (services);
408 dbus_message_unref (reply);
413 dbus_free_string_array (services);
415 if (!bus_transaction_send_from_driver (transaction, connection, reply))
417 dbus_message_unref (reply);
423 dbus_message_unref (reply);
429 bus_driver_handle_acquire_service (DBusConnection *connection,
430 BusTransaction *transaction,
431 DBusMessage *message,
435 DBusString service_name;
440 BusRegistry *registry;
442 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
444 registry = bus_connection_get_registry (connection);
446 if (!dbus_message_get_args (message, error,
447 DBUS_TYPE_STRING, &name,
448 DBUS_TYPE_UINT32, &flags,
452 _dbus_verbose ("Trying to own service %s with flags 0x%x\n", name, flags);
457 _dbus_string_init_const (&service_name, name);
459 if (!bus_registry_acquire_service (registry, connection,
460 &service_name, flags,
461 &service_reply, transaction,
465 reply = dbus_message_new_reply (message);
472 if (!dbus_message_append_args (reply, DBUS_TYPE_UINT32, service_reply, DBUS_TYPE_INVALID))
478 if (!bus_transaction_send_from_driver (transaction, connection, reply))
489 dbus_message_unref (reply);
494 bus_driver_handle_service_exists (DBusConnection *connection,
495 BusTransaction *transaction,
496 DBusMessage *message,
500 DBusString service_name;
504 BusRegistry *registry;
506 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
508 registry = bus_connection_get_registry (connection);
510 if (!dbus_message_get_args (message, error,
511 DBUS_TYPE_STRING, &name,
517 _dbus_string_init_const (&service_name, name);
518 service = bus_registry_lookup (registry, &service_name);
520 reply = dbus_message_new_reply (message);
527 if (!dbus_message_append_args (reply,
528 DBUS_TYPE_UINT32, service != NULL,
535 if (!bus_transaction_send_from_driver (transaction, connection, reply))
545 dbus_message_unref (reply);
552 bus_driver_handle_activate_service (DBusConnection *connection,
553 BusTransaction *transaction,
554 DBusMessage *message,
560 BusActivation *activation;
562 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
564 activation = bus_connection_get_activation (connection);
566 if (!dbus_message_get_args (message, error,
567 DBUS_TYPE_STRING, &name,
568 DBUS_TYPE_UINT32, &flags,
571 _DBUS_ASSERT_ERROR_IS_SET (error);
572 _dbus_verbose ("No memory to get arguments to ActivateService\n");
578 if (!bus_activation_activate_service (activation, connection, transaction,
579 message, name, error))
581 _DBUS_ASSERT_ERROR_IS_SET (error);
582 _dbus_verbose ("bus_activation_activate_service() failed\n");
593 /* For speed it might be useful to sort this in order of
594 * frequency of use (but doesn't matter with only a few items
600 dbus_bool_t (* handler) (DBusConnection *connection,
601 BusTransaction *transaction,
602 DBusMessage *message,
604 } message_handlers[] = {
605 { DBUS_MESSAGE_ACQUIRE_SERVICE, bus_driver_handle_acquire_service },
606 { DBUS_MESSAGE_ACTIVATE_SERVICE, bus_driver_handle_activate_service },
607 { DBUS_MESSAGE_HELLO, bus_driver_handle_hello },
608 { DBUS_MESSAGE_SERVICE_EXISTS, bus_driver_handle_service_exists },
609 { DBUS_MESSAGE_LIST_SERVICES, bus_driver_handle_list_services }
613 bus_driver_handle_message (DBusConnection *connection,
614 BusTransaction *transaction,
615 DBusMessage *message,
618 const char *name, *sender;
621 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
623 _dbus_verbose ("Driver got a message: %s\n",
624 dbus_message_get_name (message));
626 name = dbus_message_get_name (message);
627 sender = dbus_message_get_sender (message);
629 if (sender == NULL && (strcmp (name, DBUS_MESSAGE_HELLO) != 0))
631 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
632 "Client tried to send a message other than %s without being registered",
635 dbus_connection_disconnect (connection);
639 if (dbus_message_get_reply_serial (message) == 0)
641 _dbus_verbose ("Client sent a reply to the bus driver, ignoring it\n");
646 while (i < _DBUS_N_ELEMENTS (message_handlers))
648 if (strcmp (message_handlers[i].name, name) == 0)
650 _dbus_verbose ("Running driver handler for %s\n", name);
651 if ((* message_handlers[i].handler) (connection, transaction, message, error))
653 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
654 _dbus_verbose ("Driver handler succeeded\n");
659 _DBUS_ASSERT_ERROR_IS_SET (error);
660 _dbus_verbose ("Driver handler returned failure\n");
668 _dbus_verbose ("No driver handler for %s\n", name);
670 dbus_set_error (error, DBUS_ERROR_UNKNOWN_MESSAGE,
671 "%s does not understand message %s",
672 DBUS_SERVICE_DBUS, name);
678 bus_driver_remove_connection (DBusConnection *connection)
680 /* FIXME Does nothing for now, should unregister the connection
681 * with the bus driver.