1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* driver.c Bus client (driver)
4 * Copyright (C) 2003 CodeFactory AB
6 * Licensed under the Academic Free License version 1.2
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include "connection.h"
28 #include <dbus/dbus-string.h>
29 #include <dbus/dbus-internals.h>
32 static void bus_driver_send_welcome_message (DBusConnection *connection,
33 DBusMessage *hello_message);
36 bus_driver_send_service_deleted (const char *service_name)
40 _dbus_verbose ("sending service deleted: %s\n", service_name);
42 _DBUS_HANDLE_OOM (message = dbus_message_new (DBUS_SERVICE_BROADCAST,
43 DBUS_MESSAGE_SERVICE_DELETED));
45 _DBUS_HANDLE_OOM (dbus_message_set_sender (message, DBUS_SERVICE_DBUS));
47 _DBUS_HANDLE_OOM (dbus_message_append_fields (message,
48 DBUS_TYPE_STRING, service_name,
50 bus_dispatch_broadcast_message (message);
51 dbus_message_unref (message);
55 bus_driver_send_service_created (const char *service_name)
59 _DBUS_HANDLE_OOM (message = dbus_message_new (DBUS_SERVICE_BROADCAST,
60 DBUS_MESSAGE_SERVICE_CREATED));
62 _DBUS_HANDLE_OOM (dbus_message_set_sender (message, DBUS_SERVICE_DBUS));
64 _DBUS_HANDLE_OOM (dbus_message_append_fields (message,
65 DBUS_TYPE_STRING, service_name,
67 bus_dispatch_broadcast_message (message);
68 dbus_message_unref (message);
72 bus_driver_send_service_lost (DBusConnection *connection,
73 const char *service_name)
77 _DBUS_HANDLE_OOM (message = dbus_message_new (DBUS_SERVICE_BROADCAST,
78 DBUS_MESSAGE_SERVICE_LOST));
80 _DBUS_HANDLE_OOM (dbus_message_set_sender (message, DBUS_SERVICE_DBUS));
81 _DBUS_HANDLE_OOM (dbus_message_append_fields (message,
82 DBUS_TYPE_STRING, service_name,
84 _DBUS_HANDLE_OOM (dbus_connection_send_message (connection, message, NULL, NULL));
86 dbus_message_unref (message);
90 bus_driver_send_service_acquired (DBusConnection *connection,
91 const char *service_name)
95 _DBUS_HANDLE_OOM (message = dbus_message_new (DBUS_SERVICE_BROADCAST,
96 DBUS_MESSAGE_SERVICE_ACQUIRED));
98 _DBUS_HANDLE_OOM (dbus_message_set_sender (message, DBUS_SERVICE_DBUS));
99 _DBUS_HANDLE_OOM (dbus_message_append_fields (message,
100 DBUS_TYPE_STRING, service_name,
102 _DBUS_HANDLE_OOM (dbus_connection_send_message (connection, message, NULL, NULL));
104 dbus_message_unref (message);
108 create_unique_client_name (DBusString *str)
110 /* We never want to use the same unique client name twice, because
111 * we want to guarantee that if you send a message to a given unique
112 * name, you always get the same application. So we use two numbers
113 * for INT_MAX * INT_MAX combinations, should be pretty safe against
116 static int next_major_number = 0;
117 static int next_minor_number = 0;
120 len = _dbus_string_get_length (str);
124 /* start out with 1-0, go to 1-1, 1-2, 1-3,
125 * up to 1-MAXINT, then 2-0, 2-1, etc.
127 if (next_minor_number <= 0)
129 next_major_number += 1;
130 next_minor_number = 0;
131 if (next_major_number <= 0)
132 _dbus_assert_not_reached ("INT_MAX * INT_MAX clients were added");
135 _dbus_assert (next_major_number > 0);
136 _dbus_assert (next_minor_number >= 0);
138 /* appname:MAJOR-MINOR */
140 if (!_dbus_string_append (str, ":"))
143 if (!_dbus_string_append_int (str, next_major_number))
146 if (!_dbus_string_append (str, "-"))
149 if (!_dbus_string_append_int (str, next_minor_number))
152 next_minor_number += 1;
154 /* Check if a client with the name exists */
155 if (bus_service_lookup (str, FALSE) == NULL)
158 /* drop the number again, try the next one. */
159 _dbus_string_set_length (str, len);
166 bus_driver_handle_hello (DBusConnection *connection,
167 DBusMessage *message)
169 DBusString unique_name;
172 _DBUS_HANDLE_OOM (_dbus_string_init (&unique_name, _DBUS_INT_MAX));
173 _DBUS_HANDLE_OOM (create_unique_client_name (&unique_name));
175 /* Create the service */
176 _DBUS_HANDLE_OOM (service = bus_service_lookup (&unique_name, TRUE));
177 bus_service_set_prohibit_replacement (service, TRUE);
179 /* Add the connection as the owner */
180 _DBUS_HANDLE_OOM (bus_service_add_owner (service, connection));
181 _DBUS_HANDLE_OOM (bus_connection_set_name (connection, &unique_name));
183 _DBUS_HANDLE_OOM (dbus_message_set_sender (message,
184 bus_connection_get_name (connection)));
186 _dbus_string_free (&unique_name);
188 _DBUS_HANDLE_OOM (bus_driver_send_welcome_message (connection, message));
190 /* Broadcast a service created message */
191 bus_driver_send_service_created (bus_service_get_name (service));
195 bus_driver_send_welcome_message (DBusConnection *connection,
196 DBusMessage *hello_message)
198 DBusMessage *welcome;
201 name = bus_connection_get_name (connection);
202 _dbus_assert (name != NULL);
204 _DBUS_HANDLE_OOM (welcome = dbus_message_new_reply (hello_message));
206 _DBUS_HANDLE_OOM (dbus_message_set_sender (welcome, DBUS_SERVICE_DBUS));
208 _DBUS_HANDLE_OOM (dbus_message_append_fields (welcome,
209 DBUS_TYPE_STRING, name,
212 _DBUS_HANDLE_OOM (dbus_connection_send_message (connection, welcome, NULL, NULL));
214 dbus_message_unref (welcome);
218 bus_driver_handle_list_services (DBusConnection *connection,
219 DBusMessage *message)
225 _DBUS_HANDLE_OOM (reply = dbus_message_new_reply (message));
227 _DBUS_HANDLE_OOM (services = bus_services_list (&len));
229 _DBUS_HANDLE_OOM (dbus_message_append_fields (reply,
230 DBUS_TYPE_STRING_ARRAY, services, len,
233 _DBUS_HANDLE_OOM (dbus_connection_send_message (connection, reply, NULL, NULL));
235 dbus_message_unref (reply);
237 if (services != NULL)
239 for (i = 0; i < len; i++)
240 dbus_free (services[i]);
241 dbus_free (services);
246 bus_driver_handle_acquire_service (DBusConnection *connection,
247 DBusMessage *message)
250 DBusResultCode result;
251 DBusString service_name;
257 _DBUS_HANDLE_OOM ((result = dbus_message_get_fields (message,
258 DBUS_TYPE_STRING, &name,
259 DBUS_TYPE_UINT32, &flags,
260 0)) != DBUS_RESULT_NO_MEMORY);
262 if (result != DBUS_RESULT_SUCCESS)
265 dbus_connection_disconnect (connection);
269 _dbus_verbose ("Trying to own service %s with flags %d\n", name, flags);
271 _dbus_string_init_const (&service_name, name);
272 service = bus_service_lookup (&service_name, TRUE);
274 _DBUS_HANDLE_OOM ((reply = dbus_message_new_reply (message)));
277 * Check if the service already has an owner
279 if (bus_service_get_primary_owner (service) != NULL)
281 if (bus_service_has_owner (service, connection))
282 service_reply = DBUS_SERVICE_REPLY_ALREADY_OWNER;
283 else if (!(flags & DBUS_SERVICE_FLAG_REPLACE_EXISTING))
284 service_reply = DBUS_SERVICE_REPLY_SERVICE_EXISTS;
287 if (bus_service_get_prohibit_replacement (service))
290 /* Queue the connection */
291 _DBUS_HANDLE_OOM (bus_service_add_owner (service, connection));
293 service_reply = DBUS_SERVICE_REPLY_IN_QUEUE;
297 DBusConnection *owner;
299 /* We can replace the primary owner */
300 owner = bus_service_get_primary_owner (service);
302 /* We enqueue the new owner and remove the first one because
303 * that will cause ServiceAcquired and ServiceLost messages to
306 _DBUS_HANDLE_OOM (bus_service_add_owner (service, connection));
307 bus_service_remove_owner (service, owner);
308 _dbus_assert (connection == bus_service_get_primary_owner (service));
309 service_reply = DBUS_SERVICE_REPLY_PRIMARY_OWNER;
315 bus_service_set_prohibit_replacement (service,
316 (flags & DBUS_SERVICE_FLAG_PROHIBIT_REPLACEMENT));
318 /* Broadcast service created message */
319 bus_driver_send_service_created (bus_service_get_name (service));
321 _DBUS_HANDLE_OOM (bus_service_add_owner (service, connection));
323 service_reply = DBUS_SERVICE_REPLY_PRIMARY_OWNER;
326 _DBUS_HANDLE_OOM (dbus_message_append_fields (reply, DBUS_TYPE_UINT32, service_reply, 0));
328 /* Send service reply */
329 _DBUS_HANDLE_OOM (dbus_connection_send_message (connection, reply, NULL, NULL));
331 dbus_message_unref (reply);
335 bus_driver_handle_service_exists (DBusConnection *connection,
336 DBusMessage *message)
339 DBusResultCode result;
340 DBusString service_name;
344 _DBUS_HANDLE_OOM ((result = dbus_message_get_fields (message,
345 DBUS_TYPE_STRING, &name,
346 0)) != DBUS_RESULT_NO_MEMORY);
347 if (result != DBUS_RESULT_SUCCESS)
350 dbus_connection_disconnect (connection);
354 _dbus_string_init_const (&service_name, name);
355 service = bus_service_lookup (&service_name, FALSE);
357 _DBUS_HANDLE_OOM ((reply = dbus_message_new_reply (message)));
358 _DBUS_HANDLE_OOM (dbus_message_set_sender (reply, DBUS_SERVICE_DBUS));
360 _DBUS_HANDLE_OOM (dbus_message_append_fields (reply,
361 DBUS_TYPE_UINT32, service != NULL,
363 _DBUS_HANDLE_OOM (dbus_connection_send_message (connection, reply, NULL, NULL));
364 dbus_message_unref (reply);
369 bus_driver_handle_message (DBusConnection *connection,
370 DBusMessage *message)
372 const char *name, *sender;
374 _dbus_verbose ("Driver got a message: %s\n",
375 dbus_message_get_name (message));
377 name = dbus_message_get_name (message);
378 sender = dbus_message_get_sender (message);
380 if (sender == NULL && (strcmp (name, DBUS_MESSAGE_HELLO) != 0))
382 _dbus_verbose ("Trying to send a message without being registered. Disconnecting.\n");
383 dbus_connection_disconnect (connection);
387 /* Now check names. */
388 if (strcmp (name, DBUS_MESSAGE_HELLO) == 0)
389 bus_driver_handle_hello (connection, message);
390 else if (strcmp (name, DBUS_MESSAGE_LIST_SERVICES) == 0)
391 bus_driver_handle_list_services (connection, message);
392 else if (strcmp (name, DBUS_MESSAGE_ACQUIRE_SERVICE) == 0)
393 bus_driver_handle_acquire_service (connection, message);
394 else if (strcmp (name, DBUS_MESSAGE_SERVICE_EXISTS) == 0)
395 bus_driver_handle_service_exists (connection, message);
400 bus_driver_remove_connection (DBusConnection *connection)
402 /* Does nothing for now */