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_SERVICE_BROADCAST,
53 DBUS_MESSAGE_SERVICE_DELETED);
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_SERVICE_BROADCAST,
87 DBUS_MESSAGE_SERVICE_CREATED);
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 (bus_connection_get_name (connection),
127 DBUS_MESSAGE_SERVICE_LOST);
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 (bus_connection_get_name (connection),
167 DBUS_MESSAGE_SERVICE_ACQUIRED);
174 if (!dbus_message_append_args (message,
175 DBUS_TYPE_STRING, service_name,
178 dbus_message_unref (message);
183 if (!bus_transaction_send_from_driver (transaction, connection, message))
185 dbus_message_unref (message);
191 dbus_message_unref (message);
197 create_unique_client_name (BusRegistry *registry,
200 /* We never want to use the same unique client name twice, because
201 * we want to guarantee that if you send a message to a given unique
202 * name, you always get the same application. So we use two numbers
203 * for INT_MAX * INT_MAX combinations, should be pretty safe against
206 static int next_major_number = 0;
207 static int next_minor_number = 0;
210 len = _dbus_string_get_length (str);
214 /* start out with 1-0, go to 1-1, 1-2, 1-3,
215 * up to 1-MAXINT, then 2-0, 2-1, etc.
217 if (next_minor_number <= 0)
219 next_major_number += 1;
220 next_minor_number = 0;
221 if (next_major_number <= 0)
222 _dbus_assert_not_reached ("INT_MAX * INT_MAX clients were added");
225 _dbus_assert (next_major_number > 0);
226 _dbus_assert (next_minor_number >= 0);
228 /* appname:MAJOR-MINOR */
230 if (!_dbus_string_append (str, ":"))
233 if (!_dbus_string_append_int (str, next_major_number))
236 if (!_dbus_string_append (str, "-"))
239 if (!_dbus_string_append_int (str, next_minor_number))
242 next_minor_number += 1;
244 /* Check if a client with the name exists */
245 if (bus_registry_lookup (registry, str) == NULL)
248 /* drop the number again, try the next one. */
249 _dbus_string_set_length (str, len);
256 bus_driver_handle_hello (DBusConnection *connection,
257 BusTransaction *transaction,
258 DBusMessage *message,
261 DBusString unique_name;
264 BusRegistry *registry;
266 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
268 if (!_dbus_string_init (&unique_name))
276 registry = bus_connection_get_registry (connection);
278 if (!create_unique_client_name (registry, &unique_name))
284 if (!bus_connection_set_name (connection, &unique_name))
290 if (!dbus_message_set_sender (message,
291 bus_connection_get_name (connection)))
297 if (!bus_driver_send_welcome_message (connection, message, transaction, error))
300 /* Create the service */
301 service = bus_registry_ensure (registry,
302 &unique_name, connection, transaction, error);
306 bus_service_set_prohibit_replacement (service, TRUE);
311 _dbus_string_free (&unique_name);
316 bus_driver_send_welcome_message (DBusConnection *connection,
317 DBusMessage *hello_message,
318 BusTransaction *transaction,
321 DBusMessage *welcome;
324 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
326 name = bus_connection_get_name (connection);
327 _dbus_assert (name != NULL);
329 welcome = dbus_message_new_reply (hello_message);
336 if (!dbus_message_append_args (welcome,
337 DBUS_TYPE_STRING, name,
340 dbus_message_unref (welcome);
345 if (!bus_transaction_send_from_driver (transaction, connection, welcome))
347 dbus_message_unref (welcome);
353 dbus_message_unref (welcome);
359 bus_driver_handle_list_services (DBusConnection *connection,
360 BusTransaction *transaction,
361 DBusMessage *message,
367 BusRegistry *registry;
369 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
371 registry = bus_connection_get_registry (connection);
373 reply = dbus_message_new_reply (message);
380 if (!bus_registry_list_services (registry, &services, &len))
382 dbus_message_unref (reply);
387 if (!dbus_message_append_args (reply,
388 DBUS_TYPE_ARRAY, DBUS_TYPE_STRING, services, len,
391 dbus_free_string_array (services);
392 dbus_message_unref (reply);
397 dbus_free_string_array (services);
399 if (!bus_transaction_send_from_driver (transaction, connection, reply))
401 dbus_message_unref (reply);
407 dbus_message_unref (reply);
413 bus_driver_handle_acquire_service (DBusConnection *connection,
414 BusTransaction *transaction,
415 DBusMessage *message,
419 DBusString service_name;
424 BusRegistry *registry;
426 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
428 registry = bus_connection_get_registry (connection);
430 if (!dbus_message_get_args (message, error,
431 DBUS_TYPE_STRING, &name,
432 DBUS_TYPE_UINT32, &flags,
436 _dbus_verbose ("Trying to own service %s with flags 0x%x\n", name, flags);
441 _dbus_string_init_const (&service_name, name);
443 if (!bus_registry_acquire_service (registry, connection,
444 &service_name, flags,
445 &service_reply, transaction,
449 reply = dbus_message_new_reply (message);
456 if (!dbus_message_append_args (reply, DBUS_TYPE_UINT32, service_reply, DBUS_TYPE_INVALID))
462 if (!bus_transaction_send_from_driver (transaction, connection, reply))
473 dbus_message_unref (reply);
478 bus_driver_handle_service_exists (DBusConnection *connection,
479 BusTransaction *transaction,
480 DBusMessage *message,
484 DBusString service_name;
488 BusRegistry *registry;
490 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
492 registry = bus_connection_get_registry (connection);
494 if (!dbus_message_get_args (message, error,
495 DBUS_TYPE_STRING, &name,
501 _dbus_string_init_const (&service_name, name);
502 service = bus_registry_lookup (registry, &service_name);
504 reply = dbus_message_new_reply (message);
511 if (!dbus_message_append_args (reply,
512 DBUS_TYPE_UINT32, service != NULL,
519 if (!bus_transaction_send_from_driver (transaction, connection, reply))
529 dbus_message_unref (reply);
536 bus_driver_handle_activate_service (DBusConnection *connection,
537 BusTransaction *transaction,
538 DBusMessage *message,
544 BusActivation *activation;
546 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
548 activation = bus_connection_get_activation (connection);
550 if (!dbus_message_get_args (message, error,
551 DBUS_TYPE_STRING, &name,
552 DBUS_TYPE_UINT32, &flags,
555 _DBUS_ASSERT_ERROR_IS_SET (error);
556 _dbus_verbose ("No memory to get arguments to ActivateService\n");
562 if (!bus_activation_activate_service (activation, connection, transaction,
563 message, name, error))
565 _DBUS_ASSERT_ERROR_IS_SET (error);
566 _dbus_verbose ("bus_activation_activate_service() failed\n");
577 /* For speed it might be useful to sort this in order of
578 * frequency of use (but doesn't matter with only a few items
584 dbus_bool_t (* handler) (DBusConnection *connection,
585 BusTransaction *transaction,
586 DBusMessage *message,
588 } message_handlers[] = {
589 { DBUS_MESSAGE_ACQUIRE_SERVICE, bus_driver_handle_acquire_service },
590 { DBUS_MESSAGE_ACTIVATE_SERVICE, bus_driver_handle_activate_service },
591 { DBUS_MESSAGE_HELLO, bus_driver_handle_hello },
592 { DBUS_MESSAGE_SERVICE_EXISTS, bus_driver_handle_service_exists },
593 { DBUS_MESSAGE_LIST_SERVICES, bus_driver_handle_list_services }
597 bus_driver_handle_message (DBusConnection *connection,
598 BusTransaction *transaction,
599 DBusMessage *message,
602 const char *name, *sender;
605 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
607 _dbus_verbose ("Driver got a message: %s\n",
608 dbus_message_get_name (message));
610 name = dbus_message_get_name (message);
611 sender = dbus_message_get_sender (message);
613 if (sender == NULL && (strcmp (name, DBUS_MESSAGE_HELLO) != 0))
615 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
616 "Client tried to send a message other than %s without being registered",
619 dbus_connection_disconnect (connection);
623 if (dbus_message_get_reply_serial (message) != -1)
625 _dbus_verbose ("Client sent a reply to the bus driver, ignoring it\n");
630 while (i < _DBUS_N_ELEMENTS (message_handlers))
632 if (strcmp (message_handlers[i].name, name) == 0)
634 _dbus_verbose ("Running driver handler for %s\n", name);
635 if ((* message_handlers[i].handler) (connection, transaction, message, error))
637 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
638 _dbus_verbose ("Driver handler succeeded\n");
643 _DBUS_ASSERT_ERROR_IS_SET (error);
644 _dbus_verbose ("Driver handler returned failure\n");
652 _dbus_verbose ("No driver handler for %s\n", name);
654 dbus_set_error (error, DBUS_ERROR_UNKNOWN_MESSAGE,
655 "%s does not understand message %s",
656 DBUS_SERVICE_DBUS, name);
662 bus_driver_remove_connection (DBusConnection *connection)
664 /* FIXME Does nothing for now, should unregister the connection
665 * with the bus driver.