1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* bus.c message bus context object
4 * Copyright (C) 2003, 2004 Red Hat, Inc.
5 * Copyright (C) 2013 Samsung Electronics
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 #include "activation.h"
31 #include "connection.h"
35 #include "config-parser.h"
38 #include "dir-watch.h"
39 #include <dbus/dbus-list.h>
40 #include <dbus/dbus-hash.h>
41 #include <dbus/dbus-credentials.h>
42 #include <dbus/dbus-internals.h>
44 #ifdef ENABLE_KDBUS_TRANSPORT
66 BusConnections *connections;
67 BusActivation *activation;
68 BusRegistry *registry;
70 BusMatchmaker *matchmaker;
72 unsigned int fork : 1;
73 unsigned int syslog : 1;
74 unsigned int keep_umask : 1;
75 unsigned int allow_anonymous : 1;
76 unsigned int systemd_activation : 1;
77 #ifdef ENABLE_KDBUS_TRANSPORT
78 DBusConnection *myKdbusConnection; //todo maybe can be rafctored and removed
82 static dbus_int32_t server_data_slot = -1;
89 #define BUS_SERVER_DATA(server) (dbus_server_get_data ((server), server_data_slot))
92 server_get_context (DBusServer *server)
97 if (!dbus_server_allocate_data_slot (&server_data_slot))
100 bd = BUS_SERVER_DATA (server);
103 dbus_server_free_data_slot (&server_data_slot);
107 context = bd->context;
109 dbus_server_free_data_slot (&server_data_slot);
115 add_server_watch (DBusWatch *watch,
118 DBusServer *server = data;
121 context = server_get_context (server);
123 return _dbus_loop_add_watch (context->loop, watch);
127 remove_server_watch (DBusWatch *watch,
130 DBusServer *server = data;
133 context = server_get_context (server);
135 _dbus_loop_remove_watch (context->loop, watch);
139 toggle_server_watch (DBusWatch *watch,
142 DBusServer *server = data;
145 context = server_get_context (server);
147 _dbus_loop_toggle_watch (context->loop, watch);
151 add_server_timeout (DBusTimeout *timeout,
154 DBusServer *server = data;
157 context = server_get_context (server);
159 return _dbus_loop_add_timeout (context->loop, timeout);
163 remove_server_timeout (DBusTimeout *timeout,
166 DBusServer *server = data;
169 context = server_get_context (server);
171 _dbus_loop_remove_timeout (context->loop, timeout);
175 new_connection_callback (DBusServer *server,
176 DBusConnection *new_connection,
179 BusContext *context = data;
181 if (!bus_connections_setup_connection (context->connections, new_connection))
183 _dbus_verbose ("No memory to setup new connection\n");
185 /* if we don't do this, it will get unref'd without
186 * being disconnected... kind of strange really
187 * that we have to do this, people won't get it right
190 dbus_connection_close (new_connection);
193 dbus_connection_set_max_received_size (new_connection,
194 context->limits.max_incoming_bytes);
196 dbus_connection_set_max_message_size (new_connection,
197 context->limits.max_message_size);
199 dbus_connection_set_max_received_unix_fds (new_connection,
200 context->limits.max_incoming_unix_fds);
202 dbus_connection_set_max_message_unix_fds (new_connection,
203 context->limits.max_message_unix_fds);
205 dbus_connection_set_allow_anonymous (new_connection,
206 context->allow_anonymous);
208 /* on OOM, we won't have ref'd the connection so it will die. */
212 free_server_data (void *data)
214 BusServerData *bd = data;
220 setup_server (BusContext *context,
222 char **auth_mechanisms,
227 bd = dbus_new0 (BusServerData, 1);
228 if (bd == NULL || !dbus_server_set_data (server,
230 bd, free_server_data))
237 bd->context = context;
239 if (!dbus_server_set_auth_mechanisms (server, (const char**) auth_mechanisms))
245 dbus_server_set_new_connection_function (server,
246 new_connection_callback,
249 if (!dbus_server_set_watch_functions (server,
260 if (!dbus_server_set_timeout_functions (server,
262 remove_server_timeout,
273 #ifdef ENABLE_KDBUS_TRANSPORT
275 init_server_for_kdbus (BusContext *context,
283 if (!strcmp (context->type, "system"))
284 type = DBUS_BUS_SYSTEM;
285 else if (!strcmp (context->type, "session"))
286 type = DBUS_BUS_SESSION;
288 type = DBUS_BUS_STARTER;
290 bus_address = make_kdbus_bus (type, address, error);
291 if (bus_address == NULL)
294 server = empty_server_init (bus_address);
300 if (!_dbus_list_append (&context->servers, server))
306 context->myKdbusConnection = daemon_as_client (type, bus_address, error);
307 if (context->myKdbusConnection == NULL)
314 /* This code only gets executed the first time the
315 * config files are parsed. It is not executed
316 * when config files are reloaded.
319 process_config_first_time_only (BusContext *context,
320 BusConfigParser *parser,
321 const DBusString *address,
322 BusContextFlags flags,
325 DBusString log_prefix;
327 DBusList **addresses;
328 const char *user, *pidfile;
329 char **auth_mechanisms;
330 DBusList **auth_mechanisms_list;
334 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
337 auth_mechanisms = NULL;
340 _dbus_init_system_log (TRUE);
342 if (flags & BUS_CONTEXT_FLAG_SYSTEMD_ACTIVATION)
343 context->systemd_activation = TRUE;
345 context->systemd_activation = FALSE;
347 /* Check for an existing pid file. Of course this is a race;
348 * we'd have to use fcntl() locks on the pid file to
349 * avoid that. But we want to check for the pid file
350 * before overwriting any existing sockets, etc.
353 if (flags & BUS_CONTEXT_FLAG_WRITE_PID_FILE)
354 pidfile = bus_config_parser_get_pidfile (parser);
361 _dbus_string_init_const (&u, pidfile);
363 if (_dbus_stat (&u, &stbuf, NULL))
369 _dbus_string_init (&p);
370 _dbus_file_get_contents(&p, &u, NULL);
371 _dbus_string_parse_int(&p, 0, &pid, NULL);
372 _dbus_string_free(&p);
374 if ((kill((int)pid, 0))) {
375 dbus_set_error(NULL, DBUS_ERROR_FILE_EXISTS,
376 "pid %ld not running, removing stale pid file\n",
378 _dbus_delete_file(&u, NULL);
381 dbus_set_error (error, DBUS_ERROR_FAILED,
382 "The pid file \"%s\" exists, if the message bus is not running, remove this file",
391 /* keep around the pid filename so we can delete it later */
392 context->pidfile = _dbus_strdup (pidfile);
394 /* note that type may be NULL */
395 context->type = _dbus_strdup (bus_config_parser_get_type (parser));
396 if (bus_config_parser_get_type (parser) != NULL && context->type == NULL)
399 user = bus_config_parser_get_user (parser);
402 context->user = _dbus_strdup (user);
403 if (context->user == NULL)
407 /* Set up the prefix for syslog messages */
408 if (!_dbus_string_init (&log_prefix))
410 if (context->type && !strcmp (context->type, "system"))
412 if (!_dbus_string_append (&log_prefix, "[system] "))
415 else if (context->type && !strcmp (context->type, "session"))
417 DBusCredentials *credentials;
419 credentials = _dbus_credentials_new_from_current_process ();
422 if (!_dbus_string_append (&log_prefix, "[session "))
424 _dbus_credentials_unref (credentials);
427 if (!_dbus_credentials_to_string_append (credentials, &log_prefix))
429 _dbus_credentials_unref (credentials);
432 if (!_dbus_string_append (&log_prefix, "] "))
434 _dbus_credentials_unref (credentials);
437 _dbus_credentials_unref (credentials);
439 if (!_dbus_string_steal_data (&log_prefix, &context->log_prefix))
441 _dbus_string_free (&log_prefix);
443 /* Build an array of auth mechanisms */
445 auth_mechanisms_list = bus_config_parser_get_mechanisms (parser);
446 len = _dbus_list_get_length (auth_mechanisms_list);
452 auth_mechanisms = dbus_new0 (char*, len + 1);
453 if (auth_mechanisms == NULL)
457 link = _dbus_list_get_first_link (auth_mechanisms_list);
460 auth_mechanisms[i] = _dbus_strdup (link->data);
461 if (auth_mechanisms[i] == NULL)
463 link = _dbus_list_get_next_link (auth_mechanisms_list, link);
469 auth_mechanisms = NULL;
472 /* Listen on our addresses */
476 #ifdef ENABLE_KDBUS_TRANSPORT
477 if(!strncmp(_dbus_string_get_const_data(address), "kdbus:", strlen("kdbus:")))
481 ret = init_server_for_kdbus (context, _dbus_string_get_const_data (address), error);
493 server = dbus_server_listen (_dbus_string_get_const_data(address), error);
496 _DBUS_ASSERT_ERROR_IS_SET (error);
499 else if (!setup_server (context, server, auth_mechanisms, error))
501 _DBUS_ASSERT_ERROR_IS_SET (error);
505 if (!_dbus_list_append (&context->servers, server))
511 addresses = bus_config_parser_get_addresses (parser);
513 link = _dbus_list_get_first_link (addresses);
514 #ifdef ENABLE_KDBUS_TRANSPORT
515 if (!strcmp (link->data, "kdbus:"))
519 ret = init_server_for_kdbus (context, link->data, error);
533 server = dbus_server_listen (link->data, error);
536 _DBUS_ASSERT_ERROR_IS_SET (error);
539 else if (!setup_server (context, server, auth_mechanisms, error))
541 _DBUS_ASSERT_ERROR_IS_SET (error);
545 if (!_dbus_list_append (&context->servers, server))
548 link = _dbus_list_get_next_link (addresses, link);
553 context->fork = bus_config_parser_get_fork (parser);
554 context->syslog = bus_config_parser_get_syslog (parser);
555 context->keep_umask = bus_config_parser_get_keep_umask (parser);
556 context->allow_anonymous = bus_config_parser_get_allow_anonymous (parser);
558 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
562 dbus_free_string_array (auth_mechanisms);
567 dbus_free_string_array (auth_mechanisms);
571 /* This code gets executed every time the config files
572 * are parsed: both during BusContext construction
573 * and on reloads. This function is slightly screwy
574 * since it can do a "half reload" in out-of-memory
575 * situations. Realistically, unlikely to ever matter.
578 process_config_every_time (BusContext *context,
579 BusConfigParser *parser,
580 dbus_bool_t is_reload,
583 DBusString full_address;
587 const char *servicehelper;
592 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
597 if (!_dbus_string_init (&full_address))
603 /* get our limits and timeout lengths */
604 bus_config_parser_get_limits (parser, &context->limits);
607 bus_policy_unref (context->policy);
608 context->policy = bus_config_parser_steal_policy (parser);
609 _dbus_assert (context->policy != NULL);
611 /* We have to build the address backward, so that
612 * <listen> later in the config file have priority
614 link = _dbus_list_get_last_link (&context->servers);
617 addr = dbus_server_get_address (link->data);
624 if (_dbus_string_get_length (&full_address) > 0)
626 if (!_dbus_string_append (&full_address, ";"))
633 if (!_dbus_string_append (&full_address, addr))
642 link = _dbus_list_get_prev_link (&context->servers, link);
646 dbus_free (context->address);
648 if (!_dbus_string_copy_data (&full_address, &context->address))
654 /* get the service directories */
655 dirs = bus_config_parser_get_service_dirs (parser);
657 /* and the service helper */
658 servicehelper = bus_config_parser_get_servicehelper (parser);
660 s = _dbus_strdup(servicehelper);
661 if (s == NULL && servicehelper != NULL)
668 dbus_free(context->servicehelper);
669 context->servicehelper = s;
672 /* Create activation subsystem */
673 if (context->activation)
675 if (!bus_activation_reload (context->activation, &full_address, dirs, error))
680 context->activation = bus_activation_new (context, &full_address, dirs, error);
683 if (context->activation == NULL)
685 _DBUS_ASSERT_ERROR_IS_SET (error);
689 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
693 _dbus_string_free (&full_address);
702 list_concat_new (DBusList **a,
710 for (link = _dbus_list_get_first_link (a); link; link = _dbus_list_get_next_link (a, link))
712 if (!_dbus_list_append (result, link->data))
715 for (link = _dbus_list_get_first_link (b); link; link = _dbus_list_get_next_link (b, link))
717 if (!_dbus_list_append (result, link->data))
723 _dbus_list_clear (result);
728 raise_file_descriptor_limit (BusContext *context)
731 /* I just picked this out of thin air; we need some extra
732 * descriptors for things like any internal pipes we create,
733 * inotify, connections to SELinux, etc.
735 unsigned int arbitrary_extra_fds = 32;
738 limit = context->limits.max_completed_connections +
739 context->limits.max_incomplete_connections
740 + arbitrary_extra_fds;
742 _dbus_request_file_descriptor_limit (limit);
746 process_config_postinit (BusContext *context,
747 BusConfigParser *parser,
750 DBusHashTable *service_context_table;
751 DBusList *watched_dirs = NULL;
753 raise_file_descriptor_limit (context);
755 service_context_table = bus_config_parser_steal_service_context_table (parser);
756 if (!bus_registry_set_service_context_table (context->registry,
757 service_context_table))
763 _dbus_hash_table_unref (service_context_table);
765 /* We need to monitor both the configuration directories and directories
766 * containing .service files.
768 if (!list_concat_new (bus_config_parser_get_conf_dirs (parser),
769 bus_config_parser_get_service_dirs (parser),
776 bus_set_watched_dirs (context, &watched_dirs);
778 _dbus_list_clear (&watched_dirs);
784 bus_context_new (const DBusString *config_file,
785 BusContextFlags flags,
786 DBusPipe *print_addr_pipe,
787 DBusPipe *print_pid_pipe,
788 const DBusString *address,
792 BusConfigParser *parser;
794 _dbus_assert ((flags & BUS_CONTEXT_FLAG_FORK_NEVER) == 0 ||
795 (flags & BUS_CONTEXT_FLAG_FORK_ALWAYS) == 0);
797 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
802 if (!dbus_server_allocate_data_slot (&server_data_slot))
808 context = dbus_new0 (BusContext, 1);
814 context->refcount = 1;
816 #ifdef ENABLE_KDBUS_TRANSPORT
817 context->myKdbusConnection = NULL;
820 _dbus_generate_uuid (&context->uuid);
822 if (!_dbus_string_copy_data (config_file, &context->config_file))
828 context->loop = _dbus_loop_new ();
829 if (context->loop == NULL)
835 context->registry = bus_registry_new (context);
836 if (context->registry == NULL)
842 parser = bus_config_load (config_file, TRUE, NULL, error);
845 _DBUS_ASSERT_ERROR_IS_SET (error);
849 if (!process_config_first_time_only (context, parser, address, flags, error))
851 _DBUS_ASSERT_ERROR_IS_SET (error);
854 if (!process_config_every_time (context, parser, FALSE, error))
856 _DBUS_ASSERT_ERROR_IS_SET (error);
860 /* we need another ref of the server data slot for the context
863 if (!dbus_server_allocate_data_slot (&server_data_slot))
864 _dbus_assert_not_reached ("second ref of server data slot failed");
866 /* Note that we don't know whether the print_addr_pipe is
867 * one of the sockets we're using to listen on, or some
868 * other random thing. But I think the answer is "don't do
871 if (print_addr_pipe != NULL && _dbus_pipe_is_valid (print_addr_pipe))
874 const char *a = bus_context_get_address (context);
877 _dbus_assert (a != NULL);
878 if (!_dbus_string_init (&addr))
884 if (!_dbus_string_append (&addr, a) ||
885 !_dbus_string_append (&addr, "\n"))
887 _dbus_string_free (&addr);
892 bytes = _dbus_string_get_length (&addr);
893 if (_dbus_pipe_write (print_addr_pipe, &addr, 0, bytes, error) != bytes)
895 /* pipe write returns an error on failure but not short write */
896 if (error != NULL && !dbus_error_is_set (error))
898 dbus_set_error (error, DBUS_ERROR_FAILED,
899 "Printing message bus address: did not write all bytes\n");
901 _dbus_string_free (&addr);
905 if (!_dbus_pipe_is_stdout_or_stderr (print_addr_pipe))
906 _dbus_pipe_close (print_addr_pipe, NULL);
908 _dbus_string_free (&addr);
911 context->connections = bus_connections_new (context);
912 if (context->connections == NULL)
918 context->matchmaker = bus_matchmaker_new ();
919 if (context->matchmaker == NULL)
925 /* check user before we fork */
926 if (context->user != NULL)
928 if (!_dbus_verify_daemon_user (context->user))
930 dbus_set_error (error, DBUS_ERROR_FAILED,
931 "Could not get UID and GID for username \"%s\"",
937 /* Now become a daemon if appropriate and write out pid file in any case */
941 if (context->pidfile)
942 _dbus_string_init_const (&u, context->pidfile);
944 if (((flags & BUS_CONTEXT_FLAG_FORK_NEVER) == 0 && context->fork) ||
945 (flags & BUS_CONTEXT_FLAG_FORK_ALWAYS))
947 _dbus_verbose ("Forking and becoming daemon\n");
949 if (!_dbus_become_daemon (context->pidfile ? &u : NULL,
952 context->keep_umask))
954 _DBUS_ASSERT_ERROR_IS_SET (error);
960 _dbus_verbose ("Fork not requested\n");
962 /* Need to write PID file and to PID pipe for ourselves,
963 * not for the child process. This is a no-op if the pidfile
964 * is NULL and print_pid_pipe is NULL.
966 if (!_dbus_write_pid_to_file_and_pipe (context->pidfile ? &u : NULL,
971 _DBUS_ASSERT_ERROR_IS_SET (error);
977 if (print_pid_pipe && _dbus_pipe_is_valid (print_pid_pipe) &&
978 !_dbus_pipe_is_stdout_or_stderr (print_pid_pipe))
979 _dbus_pipe_close (print_pid_pipe, NULL);
981 if (!bus_selinux_full_init ())
983 bus_context_log (context, DBUS_SYSTEM_LOG_FATAL, "SELinux enabled but AVC initialization failed; check system log\n");
986 if (!process_config_postinit (context, parser, error))
988 _DBUS_ASSERT_ERROR_IS_SET (error);
994 bus_config_parser_unref (parser);
998 /* Here we change our credentials if required,
999 * as soon as we've set up our sockets and pidfile
1001 if (context->user != NULL)
1003 if (!_dbus_change_to_daemon_user (context->user, error))
1005 _DBUS_ASSERT_ERROR_IS_SET (error);
1010 /* FIXME - why not just put this in full_init() below? */
1011 bus_selinux_audit_init ();
1015 dbus_server_free_data_slot (&server_data_slot);
1017 #ifdef ENABLE_KDBUS_TRANSPORT
1018 if(context->myKdbusConnection)
1020 DBusString unique_name;
1022 if(!bus_connections_setup_connection(context->connections, context->myKdbusConnection))
1024 _dbus_verbose ("Bus connections setup connection failed for myKdbusConnection!\n");
1025 dbus_connection_close (context->myKdbusConnection);
1026 dbus_connection_unref (context->myKdbusConnection);
1029 dbus_connection_set_route_peer_messages (context->myKdbusConnection, FALSE);
1030 _dbus_string_init_const (&unique_name, dbus_bus_get_unique_name(context->myKdbusConnection));
1031 if(!bus_connection_complete (context->myKdbusConnection, &unique_name, error))
1033 _dbus_verbose ("Bus connection complete failed for myKdbusConnection!\n");
1037 if(!register_daemon_name(context->myKdbusConnection))
1039 _dbus_verbose ("Registering org.freedesktop.DBus name for daemon failed!\n");
1042 if(!register_kdbus_starters(context->myKdbusConnection))
1044 _dbus_verbose ("Registering kdbus starters for dbus activatable names failed!\n");
1054 bus_config_parser_unref (parser);
1055 if (context != NULL)
1056 bus_context_unref (context);
1058 if (server_data_slot >= 0)
1059 dbus_server_free_data_slot (&server_data_slot);
1065 bus_context_get_id (BusContext *context,
1068 return _dbus_uuid_encode (&context->uuid, uuid);
1072 bus_context_reload_config (BusContext *context,
1075 BusConfigParser *parser;
1076 DBusString config_file;
1079 /* Flush the user database cache */
1080 _dbus_flush_caches ();
1083 _dbus_string_init_const (&config_file, context->config_file);
1084 parser = bus_config_load (&config_file, TRUE, NULL, error);
1087 _DBUS_ASSERT_ERROR_IS_SET (error);
1091 if (!process_config_every_time (context, parser, TRUE, error))
1093 _DBUS_ASSERT_ERROR_IS_SET (error);
1096 if (!process_config_postinit (context, parser, error))
1098 _DBUS_ASSERT_ERROR_IS_SET (error);
1102 #ifdef ENABLE_KDBUS_TRANSPORT
1103 if(context->myKdbusConnection)
1105 if(!update_kdbus_starters(context->myKdbusConnection))
1107 _dbus_verbose ("Update kdbus starters for dbus activatable names failed.\n");
1108 _DBUS_ASSERT_ERROR_IS_SET (error);
1116 bus_context_log (context, DBUS_SYSTEM_LOG_INFO, "Reloaded configuration");
1119 bus_context_log (context, DBUS_SYSTEM_LOG_INFO, "Unable to reload configuration: %s", error->message);
1121 bus_config_parser_unref (parser);
1126 shutdown_server (BusContext *context,
1129 if (server == NULL ||
1130 !dbus_server_get_is_connected (server))
1133 if (!dbus_server_set_watch_functions (server,
1137 _dbus_assert_not_reached ("setting watch functions to NULL failed");
1139 if (!dbus_server_set_timeout_functions (server,
1143 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
1145 dbus_server_disconnect (server);
1149 bus_context_shutdown (BusContext *context)
1153 link = _dbus_list_get_first_link (&context->servers);
1154 while (link != NULL)
1156 shutdown_server (context, link->data);
1158 link = _dbus_list_get_next_link (&context->servers, link);
1163 bus_context_ref (BusContext *context)
1165 _dbus_assert (context->refcount > 0);
1166 context->refcount += 1;
1172 bus_context_unref (BusContext *context)
1174 _dbus_assert (context->refcount > 0);
1175 context->refcount -= 1;
1177 if (context->refcount == 0)
1181 _dbus_verbose ("Finalizing bus context %p\n", context);
1183 bus_context_shutdown (context);
1185 if (context->connections)
1187 bus_connections_unref (context->connections);
1188 context->connections = NULL;
1191 if (context->registry)
1193 bus_registry_unref (context->registry);
1194 context->registry = NULL;
1197 if (context->activation)
1199 bus_activation_unref (context->activation);
1200 context->activation = NULL;
1203 link = _dbus_list_get_first_link (&context->servers);
1204 while (link != NULL)
1206 dbus_server_unref (link->data);
1208 link = _dbus_list_get_next_link (&context->servers, link);
1210 _dbus_list_clear (&context->servers);
1212 if (context->policy)
1214 bus_policy_unref (context->policy);
1215 context->policy = NULL;
1220 _dbus_loop_unref (context->loop);
1221 context->loop = NULL;
1224 if (context->matchmaker)
1226 bus_matchmaker_unref (context->matchmaker);
1227 context->matchmaker = NULL;
1230 dbus_free (context->config_file);
1231 dbus_free (context->log_prefix);
1232 dbus_free (context->type);
1233 dbus_free (context->address);
1234 dbus_free (context->user);
1235 dbus_free (context->servicehelper);
1237 if (context->pidfile)
1240 _dbus_string_init_const (&u, context->pidfile);
1242 /* Deliberately ignore errors here, since there's not much
1243 * we can do about it, and we're exiting anyways.
1245 _dbus_delete_file (&u, NULL);
1247 dbus_free (context->pidfile);
1249 dbus_free (context);
1251 dbus_server_free_data_slot (&server_data_slot);
1255 /* type may be NULL */
1257 bus_context_get_type (BusContext *context)
1259 return context->type;
1263 bus_context_get_address (BusContext *context)
1265 return context->address;
1269 bus_context_get_servicehelper (BusContext *context)
1271 return context->servicehelper;
1275 bus_context_get_systemd_activation (BusContext *context)
1277 return context->systemd_activation;
1281 bus_context_get_registry (BusContext *context)
1283 return context->registry;
1287 bus_context_get_connections (BusContext *context)
1289 return context->connections;
1293 bus_context_get_activation (BusContext *context)
1295 return context->activation;
1299 bus_context_get_matchmaker (BusContext *context)
1301 return context->matchmaker;
1305 bus_context_get_loop (BusContext *context)
1307 return context->loop;
1311 bus_context_allow_unix_user (BusContext *context,
1314 return bus_policy_allow_unix_user (context->policy,
1318 /* For now this is never actually called because the default
1319 * DBusConnection behavior of 'same user that owns the bus can connect'
1320 * is all it would do.
1323 bus_context_allow_windows_user (BusContext *context,
1324 const char *windows_sid)
1326 return bus_policy_allow_windows_user (context->policy,
1331 bus_context_get_policy (BusContext *context)
1333 return context->policy;
1337 bus_context_create_client_policy (BusContext *context,
1338 DBusConnection *connection,
1341 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1342 return bus_policy_create_client_policy (context->policy, connection,
1347 bus_context_get_activation_timeout (BusContext *context)
1350 return context->limits.activation_timeout;
1354 bus_context_get_auth_timeout (BusContext *context)
1356 return context->limits.auth_timeout;
1360 bus_context_get_max_completed_connections (BusContext *context)
1362 return context->limits.max_completed_connections;
1366 bus_context_get_max_incomplete_connections (BusContext *context)
1368 return context->limits.max_incomplete_connections;
1372 bus_context_get_max_connections_per_user (BusContext *context)
1374 return context->limits.max_connections_per_user;
1378 bus_context_get_max_pending_activations (BusContext *context)
1380 return context->limits.max_pending_activations;
1384 bus_context_get_max_services_per_connection (BusContext *context)
1386 return context->limits.max_services_per_connection;
1390 bus_context_get_max_match_rules_per_connection (BusContext *context)
1392 return context->limits.max_match_rules_per_connection;
1396 bus_context_get_max_replies_per_connection (BusContext *context)
1398 return context->limits.max_replies_per_connection;
1402 bus_context_get_reply_timeout (BusContext *context)
1404 return context->limits.reply_timeout;
1407 #ifdef ENABLE_KDBUS_TRANSPORT
1408 dbus_bool_t bus_context_is_kdbus(BusContext* context)
1410 return context->myKdbusConnection != NULL;
1415 bus_context_log (BusContext *context, DBusSystemLogSeverity severity, const char *msg, ...) _DBUS_GNUC_PRINTF (3, 4);
1418 bus_context_log (BusContext *context, DBusSystemLogSeverity severity, const char *msg, ...)
1422 if (!context->syslog)
1424 /* we're not syslogging; just output to stderr */
1425 va_start (args, msg);
1426 vfprintf (stderr, msg, args);
1427 fprintf (stderr, "\n");
1432 va_start (args, msg);
1434 if (context->log_prefix)
1436 DBusString full_msg;
1438 if (!_dbus_string_init (&full_msg))
1440 if (!_dbus_string_append (&full_msg, context->log_prefix))
1442 if (!_dbus_string_append_printf_valist (&full_msg, msg, args))
1445 _dbus_system_log (severity, "%s", _dbus_string_get_const_data (&full_msg));
1447 _dbus_string_free (&full_msg);
1450 _dbus_system_logv (severity, msg, args);
1456 static inline const char *
1457 nonnull (const char *maybe_null,
1458 const char *if_null)
1460 return (maybe_null ? maybe_null : if_null);
1464 * Log something about a message, usually that it was rejected.
1467 complain_about_message (BusContext *context,
1468 const char *error_name,
1469 const char *complaint,
1471 DBusMessage *message,
1472 DBusConnection *sender,
1473 DBusConnection *proposed_recipient,
1474 dbus_bool_t requested_reply,
1478 DBusError stack_error = DBUS_ERROR_INIT;
1479 const char *sender_name;
1480 const char *sender_loginfo;
1481 const char *proposed_recipient_loginfo;
1483 if (error == NULL && !log)
1488 sender_name = bus_connection_get_name (sender);
1489 sender_loginfo = bus_connection_get_loginfo (sender);
1493 sender_name = "(unset)";
1494 sender_loginfo = "(bus)";
1497 if (proposed_recipient != NULL)
1498 proposed_recipient_loginfo = bus_connection_get_loginfo (proposed_recipient);
1500 proposed_recipient_loginfo = "bus";
1502 dbus_set_error (&stack_error, error_name,
1503 "%s, %d matched rules; type=\"%s\", sender=\"%s\" (%s) "
1504 "interface=\"%s\" member=\"%s\" error name=\"%s\" "
1505 "requested_reply=\"%d\" destination=\"%s\" (%s)",
1508 dbus_message_type_to_string (dbus_message_get_type (message)),
1511 nonnull (dbus_message_get_interface (message), "(unset)"),
1512 nonnull (dbus_message_get_member (message), "(unset)"),
1513 nonnull (dbus_message_get_error_name (message), "(unset)"),
1515 nonnull (dbus_message_get_destination (message), DBUS_SERVICE_DBUS),
1516 proposed_recipient_loginfo);
1518 /* If we hit OOM while setting the error, this will syslog "out of memory"
1519 * which is itself an indication that something is seriously wrong */
1521 bus_context_log (context, DBUS_SYSTEM_LOG_SECURITY, "%s",
1522 stack_error.message);
1524 dbus_move_error (&stack_error, error);
1528 * addressed_recipient is the recipient specified in the message.
1530 * proposed_recipient is the recipient we're considering sending
1531 * to right this second, and may be an eavesdropper.
1533 * sender is the sender of the message.
1535 * NULL for proposed_recipient or sender definitely means the bus driver.
1537 * NULL for addressed_recipient may mean the bus driver, or may mean
1538 * no destination was specified in the message (e.g. a signal).
1541 bus_context_check_security_policy (BusContext *context,
1542 BusTransaction *transaction,
1543 DBusConnection *sender,
1544 DBusConnection *addressed_recipient,
1545 DBusConnection *proposed_recipient,
1546 DBusMessage *message,
1550 BusClientPolicy *sender_policy;
1551 BusClientPolicy *recipient_policy;
1552 dbus_int32_t toggles;
1555 dbus_bool_t requested_reply;
1557 type = dbus_message_get_type (message);
1558 dest = dbus_message_get_destination (message);
1560 /* dispatch.c was supposed to ensure these invariants */
1561 _dbus_assert (dest != NULL ||
1562 type == DBUS_MESSAGE_TYPE_SIGNAL ||
1563 (sender == NULL && !bus_connection_is_active (proposed_recipient)));
1564 _dbus_assert (type == DBUS_MESSAGE_TYPE_SIGNAL ||
1565 addressed_recipient != NULL ||
1566 strcmp (dest, DBUS_SERVICE_DBUS) == 0);
1570 case DBUS_MESSAGE_TYPE_METHOD_CALL:
1571 case DBUS_MESSAGE_TYPE_SIGNAL:
1572 case DBUS_MESSAGE_TYPE_METHOD_RETURN:
1573 case DBUS_MESSAGE_TYPE_ERROR:
1577 _dbus_verbose ("security check disallowing message of unknown type %d\n",
1580 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1581 "Message bus will not accept messages of unknown type\n");
1586 requested_reply = FALSE;
1590 /* First verify the SELinux access controls. If allowed then
1591 * go on with the standard checks.
1593 if (!bus_selinux_allows_send (sender, proposed_recipient,
1594 dbus_message_type_to_string (dbus_message_get_type (message)),
1595 dbus_message_get_interface (message),
1596 dbus_message_get_member (message),
1597 dbus_message_get_error_name (message),
1598 dest ? dest : DBUS_SERVICE_DBUS, error))
1600 if (error != NULL && !dbus_error_is_set (error))
1602 /* don't syslog this, just set the error: avc_has_perm should
1603 * have already written to either the audit log or syslog */
1604 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1605 "An SELinux policy prevents this sender from sending this "
1606 "message to this recipient",
1607 0, message, sender, proposed_recipient, FALSE, FALSE, error);
1608 _dbus_verbose ("SELinux security check denying send to service\n");
1614 if (bus_connection_is_active (sender))
1616 sender_policy = bus_connection_get_policy (sender);
1617 _dbus_assert (sender_policy != NULL);
1619 /* Fill in requested_reply variable with TRUE if this is a
1620 * reply and the reply was pending.
1622 if (dbus_message_get_reply_serial (message) != 0)
1624 if (proposed_recipient != NULL /* not to the bus driver */ &&
1625 addressed_recipient == proposed_recipient /* not eavesdropping */)
1629 dbus_error_init (&error2);
1630 requested_reply = bus_connections_check_reply (bus_connection_get_connections (sender),
1632 sender, addressed_recipient, message,
1634 if (dbus_error_is_set (&error2))
1636 dbus_move_error (&error2, error);
1644 /* Policy for inactive connections is that they can only send
1645 * the hello message to the bus driver
1647 if (proposed_recipient == NULL &&
1648 dbus_message_is_method_call (message,
1649 DBUS_INTERFACE_DBUS,
1652 _dbus_verbose ("security check allowing %s message\n",
1658 _dbus_verbose ("security check disallowing non-%s message\n",
1661 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1662 "Client tried to send a message other than %s without being registered",
1671 sender_policy = NULL;
1673 /* If the sender is the bus driver, we assume any reply was a
1674 * requested reply as bus driver won't send bogus ones
1676 if (addressed_recipient == proposed_recipient /* not eavesdropping */ &&
1677 dbus_message_get_reply_serial (message) != 0)
1678 requested_reply = TRUE;
1681 _dbus_assert ((sender != NULL && sender_policy != NULL) ||
1682 (sender == NULL && sender_policy == NULL));
1684 if (proposed_recipient != NULL)
1686 /* only the bus driver can send to an inactive recipient (as it
1687 * owns no services, so other apps can't address it). Inactive
1688 * recipients can receive any message.
1690 if (bus_connection_is_active (proposed_recipient))
1692 recipient_policy = bus_connection_get_policy (proposed_recipient);
1693 _dbus_assert (recipient_policy != NULL);
1695 else if (sender == NULL)
1697 _dbus_verbose ("security check using NULL recipient policy for message from bus\n");
1698 recipient_policy = NULL;
1702 _dbus_assert_not_reached ("a message was somehow sent to an inactive recipient from a source other than the message bus\n");
1703 recipient_policy = NULL;
1707 recipient_policy = NULL;
1709 _dbus_assert ((proposed_recipient != NULL && recipient_policy != NULL) ||
1710 (proposed_recipient != NULL && sender == NULL && recipient_policy == NULL) ||
1711 (proposed_recipient == NULL && recipient_policy == NULL));
1714 if (sender_policy &&
1715 !bus_client_policy_check_can_send (sender_policy,
1719 message, &toggles, &log))
1721 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1722 "Rejected send message", toggles,
1723 message, sender, proposed_recipient, requested_reply,
1724 (addressed_recipient == proposed_recipient), error);
1725 _dbus_verbose ("security policy disallowing message due to sender policy\n");
1731 /* We want to drop this message, and are only not doing so for backwards
1733 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1734 "Would reject message", toggles,
1735 message, sender, proposed_recipient, requested_reply,
1739 if (recipient_policy &&
1740 !bus_client_policy_check_can_receive (recipient_policy,
1744 addressed_recipient, proposed_recipient,
1747 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1748 "Rejected receive message", toggles,
1749 message, sender, proposed_recipient, requested_reply,
1750 (addressed_recipient == proposed_recipient), NULL);
1751 _dbus_verbose ("security policy disallowing message due to recipient policy\n");
1755 /* See if limits on size have been exceeded */
1756 if (proposed_recipient &&
1757 ((dbus_connection_get_outgoing_size (proposed_recipient) > context->limits.max_outgoing_bytes) ||
1758 (dbus_connection_get_outgoing_unix_fds (proposed_recipient) > context->limits.max_outgoing_unix_fds)))
1760 complain_about_message (context, DBUS_ERROR_LIMITS_EXCEEDED,
1761 "Rejected: destination has a full message queue",
1762 0, message, sender, proposed_recipient, requested_reply, TRUE,
1764 _dbus_verbose ("security policy disallowing message due to full message queue\n");
1768 /* Record that we will allow a reply here in the future (don't
1769 * bother if the recipient is the bus or this is an eavesdropping
1770 * connection). Only the addressed recipient may reply.
1772 if (type == DBUS_MESSAGE_TYPE_METHOD_CALL &&
1774 addressed_recipient &&
1775 addressed_recipient == proposed_recipient && /* not eavesdropping */
1776 !bus_connections_expect_reply (bus_connection_get_connections (sender),
1778 sender, addressed_recipient,
1781 _dbus_verbose ("Failed to record reply expectation or problem with the message expecting a reply\n");
1785 _dbus_verbose ("security policy allowing message\n");