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"
29 #include <dbus/dbus-string.h>
30 #include <dbus/dbus-internals.h>
33 static void bus_driver_send_welcome_message (DBusConnection *connection,
34 DBusMessage *hello_message);
37 bus_driver_send_service_deleted (const char *service_name)
41 _dbus_verbose ("sending service deleted: %s\n", service_name);
43 BUS_HANDLE_OOM (message = dbus_message_new (DBUS_SERVICE_BROADCAST,
44 DBUS_MESSAGE_SERVICE_DELETED));
46 BUS_HANDLE_OOM (dbus_message_set_sender (message, DBUS_SERVICE_DBUS));
48 BUS_HANDLE_OOM (dbus_message_append_fields (message,
49 DBUS_TYPE_STRING, service_name,
51 bus_dispatch_broadcast_message (message);
52 dbus_message_unref (message);
56 bus_driver_send_service_created (const char *service_name)
60 BUS_HANDLE_OOM (message = dbus_message_new (DBUS_SERVICE_BROADCAST,
61 DBUS_MESSAGE_SERVICE_CREATED));
63 BUS_HANDLE_OOM (dbus_message_set_sender (message, DBUS_SERVICE_DBUS));
65 BUS_HANDLE_OOM (dbus_message_append_fields (message,
66 DBUS_TYPE_STRING, service_name,
68 bus_dispatch_broadcast_message (message);
69 dbus_message_unref (message);
73 bus_driver_send_service_lost (DBusConnection *connection,
74 const char *service_name)
78 BUS_HANDLE_OOM (message = dbus_message_new (DBUS_SERVICE_BROADCAST,
79 DBUS_MESSAGE_SERVICE_LOST));
81 BUS_HANDLE_OOM (dbus_message_set_sender (message, DBUS_SERVICE_DBUS));
82 BUS_HANDLE_OOM (dbus_message_append_fields (message,
83 DBUS_TYPE_STRING, service_name,
85 BUS_HANDLE_OOM (dbus_connection_send_message (connection, message, NULL, NULL));
87 dbus_message_unref (message);
91 bus_driver_send_service_acquired (DBusConnection *connection,
92 const char *service_name)
96 BUS_HANDLE_OOM (message = dbus_message_new (DBUS_SERVICE_BROADCAST,
97 DBUS_MESSAGE_SERVICE_ACQUIRED));
99 BUS_HANDLE_OOM (dbus_message_set_sender (message, DBUS_SERVICE_DBUS));
100 BUS_HANDLE_OOM (dbus_message_append_fields (message,
101 DBUS_TYPE_STRING, service_name,
103 BUS_HANDLE_OOM (dbus_connection_send_message (connection, message, NULL, NULL));
105 dbus_message_unref (message);
109 create_unique_client_name (DBusString *str)
111 /* We never want to use the same unique client name twice, because
112 * we want to guarantee that if you send a message to a given unique
113 * name, you always get the same application. So we use two numbers
114 * for INT_MAX * INT_MAX combinations, should be pretty safe against
117 static int next_major_number = 0;
118 static int next_minor_number = 0;
121 len = _dbus_string_get_length (str);
125 /* start out with 1-0, go to 1-1, 1-2, 1-3,
126 * up to 1-MAXINT, then 2-0, 2-1, etc.
128 if (next_minor_number <= 0)
130 next_major_number += 1;
131 next_minor_number = 0;
132 if (next_major_number <= 0)
133 _dbus_assert_not_reached ("INT_MAX * INT_MAX clients were added");
136 _dbus_assert (next_major_number > 0);
137 _dbus_assert (next_minor_number >= 0);
139 /* appname:MAJOR-MINOR */
141 if (!_dbus_string_append (str, ":"))
144 if (!_dbus_string_append_int (str, next_major_number))
147 if (!_dbus_string_append (str, "-"))
150 if (!_dbus_string_append_int (str, next_minor_number))
153 next_minor_number += 1;
155 /* Check if a client with the name exists */
156 if (bus_service_lookup (str, FALSE) == NULL)
159 /* drop the number again, try the next one. */
160 _dbus_string_set_length (str, len);
167 bus_driver_handle_hello (DBusConnection *connection,
168 DBusMessage *message)
170 DBusString unique_name;
173 BUS_HANDLE_OOM (_dbus_string_init (&unique_name, _DBUS_INT_MAX));
174 BUS_HANDLE_OOM (create_unique_client_name (&unique_name));
176 /* Create the service */
177 BUS_HANDLE_OOM (service = bus_service_lookup (&unique_name, TRUE));
178 bus_service_set_prohibit_replacement (service, TRUE);
180 /* Add the connection as the owner */
181 BUS_HANDLE_OOM (bus_service_add_owner (service, connection));
182 BUS_HANDLE_OOM (bus_connection_set_name (connection, &unique_name));
184 BUS_HANDLE_OOM (dbus_message_set_sender (message,
185 bus_connection_get_name (connection)));
187 _dbus_string_free (&unique_name);
189 BUS_HANDLE_OOM (bus_driver_send_welcome_message (connection, message));
191 /* Broadcast a service created message */
192 bus_driver_send_service_created (bus_service_get_name (service));
196 bus_driver_send_welcome_message (DBusConnection *connection,
197 DBusMessage *hello_message)
199 DBusMessage *welcome;
202 name = bus_connection_get_name (connection);
203 _dbus_assert (name != NULL);
205 BUS_HANDLE_OOM (welcome = dbus_message_new_reply (hello_message));
207 BUS_HANDLE_OOM (dbus_message_set_sender (welcome, DBUS_SERVICE_DBUS));
209 BUS_HANDLE_OOM (dbus_message_append_fields (welcome,
210 DBUS_TYPE_STRING, name,
213 BUS_HANDLE_OOM (dbus_connection_send_message (connection, welcome, NULL, NULL));
215 dbus_message_unref (welcome);
219 bus_driver_handle_list_services (DBusConnection *connection,
220 DBusMessage *message)
226 BUS_HANDLE_OOM (reply = dbus_message_new_reply (message));
228 BUS_HANDLE_OOM (services = bus_services_list (&len));
230 BUS_HANDLE_OOM (dbus_message_append_fields (reply,
231 DBUS_TYPE_STRING_ARRAY, services, len,
234 BUS_HANDLE_OOM (dbus_connection_send_message (connection, reply, NULL, NULL));
236 dbus_message_unref (reply);
238 if (services != NULL)
240 for (i = 0; i < len; i++)
241 dbus_free (services[i]);
242 dbus_free (services);
247 bus_driver_handle_acquire_service (DBusConnection *connection,
248 DBusMessage *message)
251 DBusResultCode result;
252 DBusString service_name;
258 BUS_HANDLE_OOM ((result = dbus_message_get_fields (message,
259 DBUS_TYPE_STRING, &name,
260 DBUS_TYPE_UINT32, &flags,
261 0)) != DBUS_RESULT_NO_MEMORY);
263 if (result != DBUS_RESULT_SUCCESS)
266 dbus_connection_disconnect (connection);
270 _dbus_verbose ("Trying to own service %s with flags %d\n", name, flags);
272 _dbus_string_init_const (&service_name, name);
273 service = bus_service_lookup (&service_name, TRUE);
275 BUS_HANDLE_OOM ((reply = dbus_message_new_reply (message)));
278 * Check if the service already has an owner
280 if (bus_service_get_primary_owner (service) != NULL)
282 if (bus_service_has_owner (service, connection))
283 service_reply = DBUS_SERVICE_REPLY_ALREADY_OWNER;
284 else if (!(flags & DBUS_SERVICE_FLAG_REPLACE_EXISTING))
285 service_reply = DBUS_SERVICE_REPLY_SERVICE_EXISTS;
288 if (bus_service_get_prohibit_replacement (service))
291 /* Queue the connection */
292 BUS_HANDLE_OOM (bus_service_add_owner (service, connection));
294 service_reply = DBUS_SERVICE_REPLY_IN_QUEUE;
298 DBusConnection *owner;
300 /* We can replace the primary owner */
301 owner = bus_service_get_primary_owner (service);
303 /* We enqueue the new owner and remove the first one because
304 * that will cause ServiceAcquired and ServiceLost messages to
307 BUS_HANDLE_OOM (bus_service_add_owner (service, connection));
308 bus_service_remove_owner (service, owner);
309 _dbus_assert (connection == bus_service_get_primary_owner (service));
310 service_reply = DBUS_SERVICE_REPLY_PRIMARY_OWNER;
316 bus_service_set_prohibit_replacement (service,
317 (flags & DBUS_SERVICE_FLAG_PROHIBIT_REPLACEMENT));
319 /* Broadcast service created message */
320 bus_driver_send_service_created (bus_service_get_name (service));
322 BUS_HANDLE_OOM (bus_service_add_owner (service, connection));
324 service_reply = DBUS_SERVICE_REPLY_PRIMARY_OWNER;
327 BUS_HANDLE_OOM (dbus_message_append_fields (reply, DBUS_TYPE_UINT32, service_reply, 0));
329 /* Send service reply */
330 BUS_HANDLE_OOM (dbus_connection_send_message (connection, reply, NULL, NULL));
332 dbus_message_unref (reply);
336 bus_driver_handle_service_exists (DBusConnection *connection,
337 DBusMessage *message)
340 DBusResultCode result;
341 DBusString service_name;
345 BUS_HANDLE_OOM ((result = dbus_message_get_fields (message,
346 DBUS_TYPE_STRING, &name,
347 0)) != DBUS_RESULT_NO_MEMORY);
348 if (result != DBUS_RESULT_SUCCESS)
351 dbus_connection_disconnect (connection);
355 _dbus_string_init_const (&service_name, name);
356 service = bus_service_lookup (&service_name, FALSE);
358 BUS_HANDLE_OOM ((reply = dbus_message_new_reply (message)));
359 BUS_HANDLE_OOM (dbus_message_set_sender (reply, DBUS_SERVICE_DBUS));
361 BUS_HANDLE_OOM (dbus_message_append_fields (reply,
362 DBUS_TYPE_UINT32, service != NULL,
364 BUS_HANDLE_OOM (dbus_connection_send_message (connection, reply, NULL, NULL));
365 dbus_message_unref (reply);
370 bus_driver_handle_message (DBusConnection *connection,
371 DBusMessage *message)
373 const char *name, *sender;
375 _dbus_verbose ("Driver got a message: %s\n",
376 dbus_message_get_name (message));
378 name = dbus_message_get_name (message);
379 sender = dbus_message_get_sender (message);
381 if (sender == NULL && (strcmp (name, DBUS_MESSAGE_HELLO) != 0))
383 _dbus_verbose ("Trying to send a message without being registered. Disconnecting.\n");
384 dbus_connection_disconnect (connection);
388 /* Now check names. */
389 if (strcmp (name, DBUS_MESSAGE_HELLO) == 0)
390 bus_driver_handle_hello (connection, message);
391 else if (strcmp (name, DBUS_MESSAGE_LIST_SERVICES) == 0)
392 bus_driver_handle_list_services (connection, message);
393 else if (strcmp (name, DBUS_MESSAGE_ACQUIRE_SERVICE) == 0)
394 bus_driver_handle_acquire_service (connection, message);
395 else if (strcmp (name, DBUS_MESSAGE_SERVICE_EXISTS) == 0)
396 bus_driver_handle_service_exists (connection, message);
401 bus_driver_remove_connection (DBusConnection *connection)
403 /* Does nothing for now */