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 /* This code only gets executed the first time the
274 * config files are parsed. It is not executed
275 * when config files are reloaded.
278 process_config_first_time_only (BusContext *context,
279 BusConfigParser *parser,
280 const DBusString *address,
281 BusContextFlags flags,
284 DBusString log_prefix;
286 DBusList **addresses;
287 const char *user, *pidfile;
288 char **auth_mechanisms;
289 DBusList **auth_mechanisms_list;
293 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
296 auth_mechanisms = NULL;
299 _dbus_init_system_log (TRUE);
301 if (flags & BUS_CONTEXT_FLAG_SYSTEMD_ACTIVATION)
302 context->systemd_activation = TRUE;
304 context->systemd_activation = FALSE;
306 /* Check for an existing pid file. Of course this is a race;
307 * we'd have to use fcntl() locks on the pid file to
308 * avoid that. But we want to check for the pid file
309 * before overwriting any existing sockets, etc.
312 if (flags & BUS_CONTEXT_FLAG_WRITE_PID_FILE)
313 pidfile = bus_config_parser_get_pidfile (parser);
320 _dbus_string_init_const (&u, pidfile);
322 if (_dbus_stat (&u, &stbuf, NULL))
328 _dbus_string_init (&p);
329 _dbus_file_get_contents(&p, &u, NULL);
330 _dbus_string_parse_int(&p, 0, &pid, NULL);
331 _dbus_string_free(&p);
333 if ((kill((int)pid, 0))) {
334 dbus_set_error(NULL, DBUS_ERROR_FILE_EXISTS,
335 "pid %ld not running, removing stale pid file\n",
337 _dbus_delete_file(&u, NULL);
340 dbus_set_error (error, DBUS_ERROR_FAILED,
341 "The pid file \"%s\" exists, if the message bus is not running, remove this file",
350 /* keep around the pid filename so we can delete it later */
351 context->pidfile = _dbus_strdup (pidfile);
353 /* note that type may be NULL */
354 context->type = _dbus_strdup (bus_config_parser_get_type (parser));
355 if (bus_config_parser_get_type (parser) != NULL && context->type == NULL)
358 user = bus_config_parser_get_user (parser);
361 context->user = _dbus_strdup (user);
362 if (context->user == NULL)
366 /* Set up the prefix for syslog messages */
367 if (!_dbus_string_init (&log_prefix))
369 if (context->type && !strcmp (context->type, "system"))
371 if (!_dbus_string_append (&log_prefix, "[system] "))
374 else if (context->type && !strcmp (context->type, "session"))
376 DBusCredentials *credentials;
378 credentials = _dbus_credentials_new_from_current_process ();
381 if (!_dbus_string_append (&log_prefix, "[session "))
383 _dbus_credentials_unref (credentials);
386 if (!_dbus_credentials_to_string_append (credentials, &log_prefix))
388 _dbus_credentials_unref (credentials);
391 if (!_dbus_string_append (&log_prefix, "] "))
393 _dbus_credentials_unref (credentials);
396 _dbus_credentials_unref (credentials);
398 if (!_dbus_string_steal_data (&log_prefix, &context->log_prefix))
400 _dbus_string_free (&log_prefix);
402 /* Build an array of auth mechanisms */
404 auth_mechanisms_list = bus_config_parser_get_mechanisms (parser);
405 len = _dbus_list_get_length (auth_mechanisms_list);
411 auth_mechanisms = dbus_new0 (char*, len + 1);
412 if (auth_mechanisms == NULL)
416 link = _dbus_list_get_first_link (auth_mechanisms_list);
419 auth_mechanisms[i] = _dbus_strdup (link->data);
420 if (auth_mechanisms[i] == NULL)
422 link = _dbus_list_get_next_link (auth_mechanisms_list, link);
428 auth_mechanisms = NULL;
431 /* Listen on our addresses */
435 #ifdef ENABLE_KDBUS_TRANSPORT
436 if(!strcmp(_dbus_string_get_const_data(address), "kdbus:"))
442 if(!strcmp (context->type, "system"))
443 type = DBUS_BUS_SYSTEM;
444 else if(!strcmp (context->type, "session"))
445 type = DBUS_BUS_SESSION;
447 type = DBUS_BUS_STARTER;
449 bus_address = make_kdbus_bus(type, error);
450 if(bus_address == NULL)
453 server = empty_server_init(bus_address);
460 if (!_dbus_list_append (&context->servers, server))
466 context->myKdbusConnection = daemon_as_client(type, bus_address, error);
467 if(context->myKdbusConnection == NULL)
475 server = dbus_server_listen (_dbus_string_get_const_data(address), error);
478 _DBUS_ASSERT_ERROR_IS_SET (error);
481 else if (!setup_server (context, server, auth_mechanisms, error))
483 _DBUS_ASSERT_ERROR_IS_SET (error);
487 if (!_dbus_list_append (&context->servers, server))
493 addresses = bus_config_parser_get_addresses (parser);
495 link = _dbus_list_get_first_link (addresses);
500 server = dbus_server_listen (link->data, error);
503 _DBUS_ASSERT_ERROR_IS_SET (error);
506 else if (!setup_server (context, server, auth_mechanisms, error))
508 _DBUS_ASSERT_ERROR_IS_SET (error);
512 if (!_dbus_list_append (&context->servers, server))
515 link = _dbus_list_get_next_link (addresses, link);
519 context->fork = bus_config_parser_get_fork (parser);
520 context->syslog = bus_config_parser_get_syslog (parser);
521 context->keep_umask = bus_config_parser_get_keep_umask (parser);
522 context->allow_anonymous = bus_config_parser_get_allow_anonymous (parser);
524 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
528 dbus_free_string_array (auth_mechanisms);
533 dbus_free_string_array (auth_mechanisms);
537 /* This code gets executed every time the config files
538 * are parsed: both during BusContext construction
539 * and on reloads. This function is slightly screwy
540 * since it can do a "half reload" in out-of-memory
541 * situations. Realistically, unlikely to ever matter.
544 process_config_every_time (BusContext *context,
545 BusConfigParser *parser,
546 dbus_bool_t is_reload,
549 DBusString full_address;
553 const char *servicehelper;
558 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
563 if (!_dbus_string_init (&full_address))
569 /* get our limits and timeout lengths */
570 bus_config_parser_get_limits (parser, &context->limits);
573 bus_policy_unref (context->policy);
574 context->policy = bus_config_parser_steal_policy (parser);
575 _dbus_assert (context->policy != NULL);
577 /* We have to build the address backward, so that
578 * <listen> later in the config file have priority
580 link = _dbus_list_get_last_link (&context->servers);
583 addr = dbus_server_get_address (link->data);
590 if (_dbus_string_get_length (&full_address) > 0)
592 if (!_dbus_string_append (&full_address, ";"))
599 if (!_dbus_string_append (&full_address, addr))
608 link = _dbus_list_get_prev_link (&context->servers, link);
612 dbus_free (context->address);
614 if (!_dbus_string_copy_data (&full_address, &context->address))
620 /* get the service directories */
621 dirs = bus_config_parser_get_service_dirs (parser);
623 /* and the service helper */
624 servicehelper = bus_config_parser_get_servicehelper (parser);
626 s = _dbus_strdup(servicehelper);
627 if (s == NULL && servicehelper != NULL)
634 dbus_free(context->servicehelper);
635 context->servicehelper = s;
638 /* Create activation subsystem */
639 if (context->activation)
641 if (!bus_activation_reload (context->activation, &full_address, dirs, error))
646 context->activation = bus_activation_new (context, &full_address, dirs, error);
649 if (context->activation == NULL)
651 _DBUS_ASSERT_ERROR_IS_SET (error);
655 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
659 _dbus_string_free (&full_address);
668 list_concat_new (DBusList **a,
676 for (link = _dbus_list_get_first_link (a); link; link = _dbus_list_get_next_link (a, link))
678 if (!_dbus_list_append (result, link->data))
681 for (link = _dbus_list_get_first_link (b); link; link = _dbus_list_get_next_link (b, link))
683 if (!_dbus_list_append (result, link->data))
689 _dbus_list_clear (result);
694 raise_file_descriptor_limit (BusContext *context)
697 /* I just picked this out of thin air; we need some extra
698 * descriptors for things like any internal pipes we create,
699 * inotify, connections to SELinux, etc.
701 unsigned int arbitrary_extra_fds = 32;
704 limit = context->limits.max_completed_connections +
705 context->limits.max_incomplete_connections
706 + arbitrary_extra_fds;
708 _dbus_request_file_descriptor_limit (limit);
712 process_config_postinit (BusContext *context,
713 BusConfigParser *parser,
716 DBusHashTable *service_context_table;
717 DBusList *watched_dirs = NULL;
719 raise_file_descriptor_limit (context);
721 service_context_table = bus_config_parser_steal_service_context_table (parser);
722 if (!bus_registry_set_service_context_table (context->registry,
723 service_context_table))
729 _dbus_hash_table_unref (service_context_table);
731 /* We need to monitor both the configuration directories and directories
732 * containing .service files.
734 if (!list_concat_new (bus_config_parser_get_conf_dirs (parser),
735 bus_config_parser_get_service_dirs (parser),
742 bus_set_watched_dirs (context, &watched_dirs);
744 _dbus_list_clear (&watched_dirs);
750 bus_context_new (const DBusString *config_file,
751 BusContextFlags flags,
752 DBusPipe *print_addr_pipe,
753 DBusPipe *print_pid_pipe,
754 const DBusString *address,
758 BusConfigParser *parser;
760 _dbus_assert ((flags & BUS_CONTEXT_FLAG_FORK_NEVER) == 0 ||
761 (flags & BUS_CONTEXT_FLAG_FORK_ALWAYS) == 0);
763 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
768 if (!dbus_server_allocate_data_slot (&server_data_slot))
774 context = dbus_new0 (BusContext, 1);
780 context->refcount = 1;
782 #ifdef ENABLE_KDBUS_TRANSPORT
783 context->myKdbusConnection = NULL;
786 _dbus_generate_uuid (&context->uuid);
788 if (!_dbus_string_copy_data (config_file, &context->config_file))
794 context->loop = _dbus_loop_new ();
795 if (context->loop == NULL)
801 context->registry = bus_registry_new (context);
802 if (context->registry == NULL)
808 parser = bus_config_load (config_file, TRUE, NULL, error);
811 _DBUS_ASSERT_ERROR_IS_SET (error);
815 if (!process_config_first_time_only (context, parser, address, flags, error))
817 _DBUS_ASSERT_ERROR_IS_SET (error);
820 if (!process_config_every_time (context, parser, FALSE, error))
822 _DBUS_ASSERT_ERROR_IS_SET (error);
826 /* we need another ref of the server data slot for the context
829 if (!dbus_server_allocate_data_slot (&server_data_slot))
830 _dbus_assert_not_reached ("second ref of server data slot failed");
832 /* Note that we don't know whether the print_addr_pipe is
833 * one of the sockets we're using to listen on, or some
834 * other random thing. But I think the answer is "don't do
837 if (print_addr_pipe != NULL && _dbus_pipe_is_valid (print_addr_pipe))
840 const char *a = bus_context_get_address (context);
843 _dbus_assert (a != NULL);
844 if (!_dbus_string_init (&addr))
850 if (!_dbus_string_append (&addr, a) ||
851 !_dbus_string_append (&addr, "\n"))
853 _dbus_string_free (&addr);
858 bytes = _dbus_string_get_length (&addr);
859 if (_dbus_pipe_write (print_addr_pipe, &addr, 0, bytes, error) != bytes)
861 /* pipe write returns an error on failure but not short write */
862 if (error != NULL && !dbus_error_is_set (error))
864 dbus_set_error (error, DBUS_ERROR_FAILED,
865 "Printing message bus address: did not write all bytes\n");
867 _dbus_string_free (&addr);
871 if (!_dbus_pipe_is_stdout_or_stderr (print_addr_pipe))
872 _dbus_pipe_close (print_addr_pipe, NULL);
874 _dbus_string_free (&addr);
877 context->connections = bus_connections_new (context);
878 if (context->connections == NULL)
884 context->matchmaker = bus_matchmaker_new ();
885 if (context->matchmaker == NULL)
891 /* check user before we fork */
892 if (context->user != NULL)
894 if (!_dbus_verify_daemon_user (context->user))
896 dbus_set_error (error, DBUS_ERROR_FAILED,
897 "Could not get UID and GID for username \"%s\"",
903 /* Now become a daemon if appropriate and write out pid file in any case */
907 if (context->pidfile)
908 _dbus_string_init_const (&u, context->pidfile);
910 if (((flags & BUS_CONTEXT_FLAG_FORK_NEVER) == 0 && context->fork) ||
911 (flags & BUS_CONTEXT_FLAG_FORK_ALWAYS))
913 _dbus_verbose ("Forking and becoming daemon\n");
915 if (!_dbus_become_daemon (context->pidfile ? &u : NULL,
918 context->keep_umask))
920 _DBUS_ASSERT_ERROR_IS_SET (error);
926 _dbus_verbose ("Fork not requested\n");
928 /* Need to write PID file and to PID pipe for ourselves,
929 * not for the child process. This is a no-op if the pidfile
930 * is NULL and print_pid_pipe is NULL.
932 if (!_dbus_write_pid_to_file_and_pipe (context->pidfile ? &u : NULL,
937 _DBUS_ASSERT_ERROR_IS_SET (error);
943 if (print_pid_pipe && _dbus_pipe_is_valid (print_pid_pipe) &&
944 !_dbus_pipe_is_stdout_or_stderr (print_pid_pipe))
945 _dbus_pipe_close (print_pid_pipe, NULL);
947 if (!bus_selinux_full_init ())
949 bus_context_log (context, DBUS_SYSTEM_LOG_FATAL, "SELinux enabled but AVC initialization failed; check system log\n");
952 if (!process_config_postinit (context, parser, error))
954 _DBUS_ASSERT_ERROR_IS_SET (error);
960 bus_config_parser_unref (parser);
964 /* Here we change our credentials if required,
965 * as soon as we've set up our sockets and pidfile
967 if (context->user != NULL)
969 if (!_dbus_change_to_daemon_user (context->user, error))
971 _DBUS_ASSERT_ERROR_IS_SET (error);
976 /* FIXME - why not just put this in full_init() below? */
977 bus_selinux_audit_init ();
981 dbus_server_free_data_slot (&server_data_slot);
983 #ifdef ENABLE_KDBUS_TRANSPORT
984 if(context->myKdbusConnection)
986 DBusString unique_name;
988 if(!bus_connections_setup_connection(context->connections, context->myKdbusConnection))
990 _dbus_verbose ("Bus connections setup connection failed for myKdbusConnection!\n");
991 dbus_connection_close (context->myKdbusConnection);
992 dbus_connection_unref (context->myKdbusConnection);
995 dbus_connection_set_route_peer_messages (context->myKdbusConnection, FALSE);
996 _dbus_string_init_const (&unique_name, ":1.1"); //dbus_bus_get_unique_name(context->myConnection)); this is without :1.
997 if(!bus_connection_complete (context->myKdbusConnection, &unique_name, error))
999 _dbus_verbose ("Bus connection complete failed for myKdbusConnection!\n");
1003 if(!register_daemon_name(context->myKdbusConnection))
1005 _dbus_verbose ("Registering org.freedesktop.DBus name for daemon failed!\n");
1008 if(!register_kdbus_starters(context->myKdbusConnection))
1010 _dbus_verbose ("Registering kdbus starters for dbus activatable names failed!\n");
1020 bus_config_parser_unref (parser);
1021 if (context != NULL)
1022 bus_context_unref (context);
1024 if (server_data_slot >= 0)
1025 dbus_server_free_data_slot (&server_data_slot);
1031 bus_context_get_id (BusContext *context,
1034 return _dbus_uuid_encode (&context->uuid, uuid);
1038 bus_context_reload_config (BusContext *context,
1041 BusConfigParser *parser;
1042 DBusString config_file;
1045 /* Flush the user database cache */
1046 _dbus_flush_caches ();
1049 _dbus_string_init_const (&config_file, context->config_file);
1050 parser = bus_config_load (&config_file, TRUE, NULL, error);
1053 _DBUS_ASSERT_ERROR_IS_SET (error);
1057 if (!process_config_every_time (context, parser, TRUE, error))
1059 _DBUS_ASSERT_ERROR_IS_SET (error);
1062 if (!process_config_postinit (context, parser, error))
1064 _DBUS_ASSERT_ERROR_IS_SET (error);
1068 #ifdef ENABLE_KDBUS_TRANSPORT
1069 if(context->myKdbusConnection)
1071 if(!update_kdbus_starters(context->myKdbusConnection))
1073 _dbus_verbose ("Update kdbus starters for dbus activatable names failed.\n");
1074 _DBUS_ASSERT_ERROR_IS_SET (error);
1082 bus_context_log (context, DBUS_SYSTEM_LOG_INFO, "Reloaded configuration");
1085 bus_context_log (context, DBUS_SYSTEM_LOG_INFO, "Unable to reload configuration: %s", error->message);
1087 bus_config_parser_unref (parser);
1092 shutdown_server (BusContext *context,
1095 if (server == NULL ||
1096 !dbus_server_get_is_connected (server))
1099 if (!dbus_server_set_watch_functions (server,
1103 _dbus_assert_not_reached ("setting watch functions to NULL failed");
1105 if (!dbus_server_set_timeout_functions (server,
1109 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
1111 dbus_server_disconnect (server);
1115 bus_context_shutdown (BusContext *context)
1119 link = _dbus_list_get_first_link (&context->servers);
1120 while (link != NULL)
1122 shutdown_server (context, link->data);
1124 link = _dbus_list_get_next_link (&context->servers, link);
1129 bus_context_ref (BusContext *context)
1131 _dbus_assert (context->refcount > 0);
1132 context->refcount += 1;
1138 bus_context_unref (BusContext *context)
1140 _dbus_assert (context->refcount > 0);
1141 context->refcount -= 1;
1143 if (context->refcount == 0)
1147 _dbus_verbose ("Finalizing bus context %p\n", context);
1149 bus_context_shutdown (context);
1151 if (context->connections)
1153 bus_connections_unref (context->connections);
1154 context->connections = NULL;
1157 if (context->registry)
1159 bus_registry_unref (context->registry);
1160 context->registry = NULL;
1163 if (context->activation)
1165 bus_activation_unref (context->activation);
1166 context->activation = NULL;
1169 link = _dbus_list_get_first_link (&context->servers);
1170 while (link != NULL)
1172 dbus_server_unref (link->data);
1174 link = _dbus_list_get_next_link (&context->servers, link);
1176 _dbus_list_clear (&context->servers);
1178 if (context->policy)
1180 bus_policy_unref (context->policy);
1181 context->policy = NULL;
1186 _dbus_loop_unref (context->loop);
1187 context->loop = NULL;
1190 if (context->matchmaker)
1192 bus_matchmaker_unref (context->matchmaker);
1193 context->matchmaker = NULL;
1196 dbus_free (context->config_file);
1197 dbus_free (context->log_prefix);
1198 dbus_free (context->type);
1199 dbus_free (context->address);
1200 dbus_free (context->user);
1201 dbus_free (context->servicehelper);
1203 if (context->pidfile)
1206 _dbus_string_init_const (&u, context->pidfile);
1208 /* Deliberately ignore errors here, since there's not much
1209 * we can do about it, and we're exiting anyways.
1211 _dbus_delete_file (&u, NULL);
1213 dbus_free (context->pidfile);
1215 dbus_free (context);
1217 dbus_server_free_data_slot (&server_data_slot);
1221 /* type may be NULL */
1223 bus_context_get_type (BusContext *context)
1225 return context->type;
1229 bus_context_get_address (BusContext *context)
1231 return context->address;
1235 bus_context_get_servicehelper (BusContext *context)
1237 return context->servicehelper;
1241 bus_context_get_systemd_activation (BusContext *context)
1243 return context->systemd_activation;
1247 bus_context_get_registry (BusContext *context)
1249 return context->registry;
1253 bus_context_get_connections (BusContext *context)
1255 return context->connections;
1259 bus_context_get_activation (BusContext *context)
1261 return context->activation;
1265 bus_context_get_matchmaker (BusContext *context)
1267 return context->matchmaker;
1271 bus_context_get_loop (BusContext *context)
1273 return context->loop;
1277 bus_context_allow_unix_user (BusContext *context,
1280 return bus_policy_allow_unix_user (context->policy,
1284 /* For now this is never actually called because the default
1285 * DBusConnection behavior of 'same user that owns the bus can connect'
1286 * is all it would do.
1289 bus_context_allow_windows_user (BusContext *context,
1290 const char *windows_sid)
1292 return bus_policy_allow_windows_user (context->policy,
1297 bus_context_get_policy (BusContext *context)
1299 return context->policy;
1303 bus_context_create_client_policy (BusContext *context,
1304 DBusConnection *connection,
1307 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1308 return bus_policy_create_client_policy (context->policy, connection,
1313 bus_context_get_activation_timeout (BusContext *context)
1316 return context->limits.activation_timeout;
1320 bus_context_get_auth_timeout (BusContext *context)
1322 return context->limits.auth_timeout;
1326 bus_context_get_max_completed_connections (BusContext *context)
1328 return context->limits.max_completed_connections;
1332 bus_context_get_max_incomplete_connections (BusContext *context)
1334 return context->limits.max_incomplete_connections;
1338 bus_context_get_max_connections_per_user (BusContext *context)
1340 return context->limits.max_connections_per_user;
1344 bus_context_get_max_pending_activations (BusContext *context)
1346 return context->limits.max_pending_activations;
1350 bus_context_get_max_services_per_connection (BusContext *context)
1352 return context->limits.max_services_per_connection;
1356 bus_context_get_max_match_rules_per_connection (BusContext *context)
1358 return context->limits.max_match_rules_per_connection;
1362 bus_context_get_max_replies_per_connection (BusContext *context)
1364 return context->limits.max_replies_per_connection;
1368 bus_context_get_reply_timeout (BusContext *context)
1370 return context->limits.reply_timeout;
1373 #ifdef ENABLE_KDBUS_TRANSPORT
1374 dbus_bool_t bus_context_is_kdbus(BusContext* context)
1376 return context->myKdbusConnection != NULL;
1381 bus_context_log (BusContext *context, DBusSystemLogSeverity severity, const char *msg, ...) _DBUS_GNUC_PRINTF (3, 4);
1384 bus_context_log (BusContext *context, DBusSystemLogSeverity severity, const char *msg, ...)
1388 if (!context->syslog)
1390 /* we're not syslogging; just output to stderr */
1391 va_start (args, msg);
1392 vfprintf (stderr, msg, args);
1393 fprintf (stderr, "\n");
1398 va_start (args, msg);
1400 if (context->log_prefix)
1402 DBusString full_msg;
1404 if (!_dbus_string_init (&full_msg))
1406 if (!_dbus_string_append (&full_msg, context->log_prefix))
1408 if (!_dbus_string_append_printf_valist (&full_msg, msg, args))
1411 _dbus_system_log (severity, "%s", _dbus_string_get_const_data (&full_msg));
1413 _dbus_string_free (&full_msg);
1416 _dbus_system_logv (severity, msg, args);
1422 static inline const char *
1423 nonnull (const char *maybe_null,
1424 const char *if_null)
1426 return (maybe_null ? maybe_null : if_null);
1430 * Log something about a message, usually that it was rejected.
1433 complain_about_message (BusContext *context,
1434 const char *error_name,
1435 const char *complaint,
1437 DBusMessage *message,
1438 DBusConnection *sender,
1439 DBusConnection *proposed_recipient,
1440 dbus_bool_t requested_reply,
1444 DBusError stack_error = DBUS_ERROR_INIT;
1445 const char *sender_name;
1446 const char *sender_loginfo;
1447 const char *proposed_recipient_loginfo;
1449 if (error == NULL && !log)
1454 sender_name = bus_connection_get_name (sender);
1455 sender_loginfo = bus_connection_get_loginfo (sender);
1459 sender_name = "(unset)";
1460 sender_loginfo = "(bus)";
1463 if (proposed_recipient != NULL)
1464 proposed_recipient_loginfo = bus_connection_get_loginfo (proposed_recipient);
1466 proposed_recipient_loginfo = "bus";
1468 dbus_set_error (&stack_error, error_name,
1469 "%s, %d matched rules; type=\"%s\", sender=\"%s\" (%s) "
1470 "interface=\"%s\" member=\"%s\" error name=\"%s\" "
1471 "requested_reply=\"%d\" destination=\"%s\" (%s)",
1474 dbus_message_type_to_string (dbus_message_get_type (message)),
1477 nonnull (dbus_message_get_interface (message), "(unset)"),
1478 nonnull (dbus_message_get_member (message), "(unset)"),
1479 nonnull (dbus_message_get_error_name (message), "(unset)"),
1481 nonnull (dbus_message_get_destination (message), DBUS_SERVICE_DBUS),
1482 proposed_recipient_loginfo);
1484 /* If we hit OOM while setting the error, this will syslog "out of memory"
1485 * which is itself an indication that something is seriously wrong */
1487 bus_context_log (context, DBUS_SYSTEM_LOG_SECURITY, "%s",
1488 stack_error.message);
1490 dbus_move_error (&stack_error, error);
1494 * addressed_recipient is the recipient specified in the message.
1496 * proposed_recipient is the recipient we're considering sending
1497 * to right this second, and may be an eavesdropper.
1499 * sender is the sender of the message.
1501 * NULL for proposed_recipient or sender definitely means the bus driver.
1503 * NULL for addressed_recipient may mean the bus driver, or may mean
1504 * no destination was specified in the message (e.g. a signal).
1507 bus_context_check_security_policy (BusContext *context,
1508 BusTransaction *transaction,
1509 DBusConnection *sender,
1510 DBusConnection *addressed_recipient,
1511 DBusConnection *proposed_recipient,
1512 DBusMessage *message,
1516 BusClientPolicy *sender_policy;
1517 BusClientPolicy *recipient_policy;
1518 dbus_int32_t toggles;
1521 dbus_bool_t requested_reply;
1523 type = dbus_message_get_type (message);
1524 dest = dbus_message_get_destination (message);
1526 /* dispatch.c was supposed to ensure these invariants */
1527 _dbus_assert (dest != NULL ||
1528 type == DBUS_MESSAGE_TYPE_SIGNAL ||
1529 (sender == NULL && !bus_connection_is_active (proposed_recipient)));
1530 _dbus_assert (type == DBUS_MESSAGE_TYPE_SIGNAL ||
1531 addressed_recipient != NULL ||
1532 strcmp (dest, DBUS_SERVICE_DBUS) == 0);
1536 case DBUS_MESSAGE_TYPE_METHOD_CALL:
1537 case DBUS_MESSAGE_TYPE_SIGNAL:
1538 case DBUS_MESSAGE_TYPE_METHOD_RETURN:
1539 case DBUS_MESSAGE_TYPE_ERROR:
1543 _dbus_verbose ("security check disallowing message of unknown type %d\n",
1546 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1547 "Message bus will not accept messages of unknown type\n");
1552 requested_reply = FALSE;
1556 /* First verify the SELinux access controls. If allowed then
1557 * go on with the standard checks.
1559 if (!bus_selinux_allows_send (sender, proposed_recipient,
1560 dbus_message_type_to_string (dbus_message_get_type (message)),
1561 dbus_message_get_interface (message),
1562 dbus_message_get_member (message),
1563 dbus_message_get_error_name (message),
1564 dest ? dest : DBUS_SERVICE_DBUS, error))
1566 if (error != NULL && !dbus_error_is_set (error))
1568 /* don't syslog this, just set the error: avc_has_perm should
1569 * have already written to either the audit log or syslog */
1570 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1571 "An SELinux policy prevents this sender from sending this "
1572 "message to this recipient",
1573 0, message, sender, proposed_recipient, FALSE, FALSE, error);
1574 _dbus_verbose ("SELinux security check denying send to service\n");
1580 if (bus_connection_is_active (sender))
1582 sender_policy = bus_connection_get_policy (sender);
1583 _dbus_assert (sender_policy != NULL);
1585 /* Fill in requested_reply variable with TRUE if this is a
1586 * reply and the reply was pending.
1588 if (dbus_message_get_reply_serial (message) != 0)
1590 if (proposed_recipient != NULL /* not to the bus driver */ &&
1591 addressed_recipient == proposed_recipient /* not eavesdropping */)
1595 dbus_error_init (&error2);
1596 requested_reply = bus_connections_check_reply (bus_connection_get_connections (sender),
1598 sender, addressed_recipient, message,
1600 if (dbus_error_is_set (&error2))
1602 dbus_move_error (&error2, error);
1610 /* Policy for inactive connections is that they can only send
1611 * the hello message to the bus driver
1613 if (proposed_recipient == NULL &&
1614 dbus_message_is_method_call (message,
1615 DBUS_INTERFACE_DBUS,
1618 _dbus_verbose ("security check allowing %s message\n",
1624 _dbus_verbose ("security check disallowing non-%s message\n",
1627 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1628 "Client tried to send a message other than %s without being registered",
1637 sender_policy = NULL;
1639 /* If the sender is the bus driver, we assume any reply was a
1640 * requested reply as bus driver won't send bogus ones
1642 if (addressed_recipient == proposed_recipient /* not eavesdropping */ &&
1643 dbus_message_get_reply_serial (message) != 0)
1644 requested_reply = TRUE;
1647 _dbus_assert ((sender != NULL && sender_policy != NULL) ||
1648 (sender == NULL && sender_policy == NULL));
1650 if (proposed_recipient != NULL)
1652 /* only the bus driver can send to an inactive recipient (as it
1653 * owns no services, so other apps can't address it). Inactive
1654 * recipients can receive any message.
1656 if (bus_connection_is_active (proposed_recipient))
1658 recipient_policy = bus_connection_get_policy (proposed_recipient);
1659 _dbus_assert (recipient_policy != NULL);
1661 else if (sender == NULL)
1663 _dbus_verbose ("security check using NULL recipient policy for message from bus\n");
1664 recipient_policy = NULL;
1668 _dbus_assert_not_reached ("a message was somehow sent to an inactive recipient from a source other than the message bus\n");
1669 recipient_policy = NULL;
1673 recipient_policy = NULL;
1675 _dbus_assert ((proposed_recipient != NULL && recipient_policy != NULL) ||
1676 (proposed_recipient != NULL && sender == NULL && recipient_policy == NULL) ||
1677 (proposed_recipient == NULL && recipient_policy == NULL));
1680 if (sender_policy &&
1681 !bus_client_policy_check_can_send (sender_policy,
1685 message, &toggles, &log))
1687 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1688 "Rejected send message", toggles,
1689 message, sender, proposed_recipient, requested_reply,
1690 (addressed_recipient == proposed_recipient), error);
1691 _dbus_verbose ("security policy disallowing message due to sender policy\n");
1697 /* We want to drop this message, and are only not doing so for backwards
1699 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1700 "Would reject message", toggles,
1701 message, sender, proposed_recipient, requested_reply,
1705 if (recipient_policy &&
1706 !bus_client_policy_check_can_receive (recipient_policy,
1710 addressed_recipient, proposed_recipient,
1713 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1714 "Rejected receive message", toggles,
1715 message, sender, proposed_recipient, requested_reply,
1716 (addressed_recipient == proposed_recipient), NULL);
1717 _dbus_verbose ("security policy disallowing message due to recipient policy\n");
1721 /* See if limits on size have been exceeded */
1722 if (proposed_recipient &&
1723 ((dbus_connection_get_outgoing_size (proposed_recipient) > context->limits.max_outgoing_bytes) ||
1724 (dbus_connection_get_outgoing_unix_fds (proposed_recipient) > context->limits.max_outgoing_unix_fds)))
1726 complain_about_message (context, DBUS_ERROR_LIMITS_EXCEEDED,
1727 "Rejected: destination has a full message queue",
1728 0, message, sender, proposed_recipient, requested_reply, TRUE,
1730 _dbus_verbose ("security policy disallowing message due to full message queue\n");
1734 /* Record that we will allow a reply here in the future (don't
1735 * bother if the recipient is the bus or this is an eavesdropping
1736 * connection). Only the addressed recipient may reply.
1738 if (type == DBUS_MESSAGE_TYPE_METHOD_CALL &&
1740 addressed_recipient &&
1741 addressed_recipient == proposed_recipient && /* not eavesdropping */
1742 !bus_connections_expect_reply (bus_connection_get_connections (sender),
1744 sender, addressed_recipient,
1747 _dbus_verbose ("Failed to record reply expectation or problem with the message expecting a reply\n");
1751 _dbus_verbose ("security policy allowing message\n");