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.
6 * Licensed under the Academic Free License version 2.1
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "activation.h"
26 #include "connection.h"
30 #include "config-parser.h"
33 #include "dir-watch.h"
34 #include <dbus/dbus-list.h>
35 #include <dbus/dbus-hash.h>
36 #include <dbus/dbus-internals.h>
50 BusConnections *connections;
51 BusActivation *activation;
52 BusRegistry *registry;
54 BusMatchmaker *matchmaker;
56 unsigned int fork : 1;
57 unsigned int syslog : 1;
58 unsigned int keep_umask : 1;
61 static dbus_int32_t server_data_slot = -1;
68 #define BUS_SERVER_DATA(server) (dbus_server_get_data ((server), server_data_slot))
71 server_get_context (DBusServer *server)
76 if (!dbus_server_allocate_data_slot (&server_data_slot))
79 bd = BUS_SERVER_DATA (server);
82 dbus_server_free_data_slot (&server_data_slot);
86 context = bd->context;
88 dbus_server_free_data_slot (&server_data_slot);
94 server_watch_callback (DBusWatch *watch,
95 unsigned int condition,
98 /* FIXME this can be done in dbus-mainloop.c
99 * if the code in activation.c for the babysitter
100 * watch handler is fixed.
103 return dbus_watch_handle (watch, condition);
107 add_server_watch (DBusWatch *watch,
110 DBusServer *server = data;
113 context = server_get_context (server);
115 return _dbus_loop_add_watch (context->loop,
116 watch, server_watch_callback, server,
121 remove_server_watch (DBusWatch *watch,
124 DBusServer *server = data;
127 context = server_get_context (server);
129 _dbus_loop_remove_watch (context->loop,
130 watch, server_watch_callback, server);
135 server_timeout_callback (DBusTimeout *timeout,
138 /* can return FALSE on OOM but we just let it fire again later */
139 dbus_timeout_handle (timeout);
143 add_server_timeout (DBusTimeout *timeout,
146 DBusServer *server = data;
149 context = server_get_context (server);
151 return _dbus_loop_add_timeout (context->loop,
152 timeout, server_timeout_callback, server, NULL);
156 remove_server_timeout (DBusTimeout *timeout,
159 DBusServer *server = data;
162 context = server_get_context (server);
164 _dbus_loop_remove_timeout (context->loop,
165 timeout, server_timeout_callback, server);
169 new_connection_callback (DBusServer *server,
170 DBusConnection *new_connection,
173 BusContext *context = data;
175 if (!bus_connections_setup_connection (context->connections, new_connection))
177 _dbus_verbose ("No memory to setup new connection\n");
179 /* if we don't do this, it will get unref'd without
180 * being disconnected... kind of strange really
181 * that we have to do this, people won't get it right
184 dbus_connection_close (new_connection);
187 dbus_connection_set_max_received_size (new_connection,
188 context->limits.max_incoming_bytes);
190 dbus_connection_set_max_message_size (new_connection,
191 context->limits.max_message_size);
193 /* on OOM, we won't have ref'd the connection so it will die. */
197 free_server_data (void *data)
199 BusServerData *bd = data;
205 setup_server (BusContext *context,
207 char **auth_mechanisms,
212 bd = dbus_new0 (BusServerData, 1);
213 if (bd == NULL || !dbus_server_set_data (server,
215 bd, free_server_data))
222 bd->context = context;
224 if (!dbus_server_set_auth_mechanisms (server, (const char**) auth_mechanisms))
230 dbus_server_set_new_connection_function (server,
231 new_connection_callback,
234 if (!dbus_server_set_watch_functions (server,
245 if (!dbus_server_set_timeout_functions (server,
247 remove_server_timeout,
258 /* This code only gets executed the first time the
259 * config files are parsed. It is not executed
260 * when config files are reloaded.
263 process_config_first_time_only (BusContext *context,
264 BusConfigParser *parser,
268 DBusList **addresses;
269 const char *user, *pidfile;
270 char **auth_mechanisms;
271 DBusList **auth_mechanisms_list;
275 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
278 auth_mechanisms = NULL;
280 /* Check for an existing pid file. Of course this is a race;
281 * we'd have to use fcntl() locks on the pid file to
282 * avoid that. But we want to check for the pid file
283 * before overwriting any existing sockets, etc.
285 pidfile = bus_config_parser_get_pidfile (parser);
291 _dbus_string_init_const (&u, pidfile);
293 if (_dbus_stat (&u, &stbuf, NULL))
295 dbus_set_error (error, DBUS_ERROR_FAILED,
296 "The pid file \"%s\" exists, if the message bus is not running, remove this file",
302 /* keep around the pid filename so we can delete it later */
303 context->pidfile = _dbus_strdup (pidfile);
305 /* Build an array of auth mechanisms */
307 auth_mechanisms_list = bus_config_parser_get_mechanisms (parser);
308 len = _dbus_list_get_length (auth_mechanisms_list);
314 auth_mechanisms = dbus_new0 (char*, len + 1);
315 if (auth_mechanisms == NULL)
322 link = _dbus_list_get_first_link (auth_mechanisms_list);
325 auth_mechanisms[i] = _dbus_strdup (link->data);
326 if (auth_mechanisms[i] == NULL)
331 link = _dbus_list_get_next_link (auth_mechanisms_list, link);
336 auth_mechanisms = NULL;
339 /* Listen on our addresses */
341 addresses = bus_config_parser_get_addresses (parser);
343 link = _dbus_list_get_first_link (addresses);
348 server = dbus_server_listen (link->data, error);
351 _DBUS_ASSERT_ERROR_IS_SET (error);
354 else if (!setup_server (context, server, auth_mechanisms, error))
356 _DBUS_ASSERT_ERROR_IS_SET (error);
360 if (!_dbus_list_append (&context->servers, server))
366 link = _dbus_list_get_next_link (addresses, link);
369 /* note that type may be NULL */
370 context->type = _dbus_strdup (bus_config_parser_get_type (parser));
371 if (bus_config_parser_get_type (parser) != NULL && context->type == NULL)
377 user = bus_config_parser_get_user (parser);
380 context->user = _dbus_strdup (user);
381 if (context->user == NULL)
388 context->fork = bus_config_parser_get_fork (parser);
389 context->syslog = bus_config_parser_get_syslog (parser);
390 context->keep_umask = bus_config_parser_get_keep_umask (parser);
392 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
396 dbus_free_string_array (auth_mechanisms);
400 /* This code gets executed every time the config files
401 * are parsed: both during BusContext construction
402 * and on reloads. This function is slightly screwy
403 * since it can do a "half reload" in out-of-memory
404 * situations. Realistically, unlikely to ever matter.
407 process_config_every_time (BusContext *context,
408 BusConfigParser *parser,
409 dbus_bool_t is_reload,
412 DBusString full_address;
415 BusActivation *new_activation;
417 const char *servicehelper;
422 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
427 if (!_dbus_string_init (&full_address))
433 /* get our limits and timeout lengths */
434 bus_config_parser_get_limits (parser, &context->limits);
437 bus_policy_unref (context->policy);
438 context->policy = bus_config_parser_steal_policy (parser);
439 _dbus_assert (context->policy != NULL);
441 /* We have to build the address backward, so that
442 * <listen> later in the config file have priority
444 link = _dbus_list_get_last_link (&context->servers);
447 addr = dbus_server_get_address (link->data);
454 if (_dbus_string_get_length (&full_address) > 0)
456 if (!_dbus_string_append (&full_address, ";"))
463 if (!_dbus_string_append (&full_address, addr))
472 link = _dbus_list_get_prev_link (&context->servers, link);
476 dbus_free (context->address);
478 if (!_dbus_string_copy_data (&full_address, &context->address))
484 /* get the service directories */
485 dirs = bus_config_parser_get_service_dirs (parser);
487 /* and the service helper */
488 servicehelper = bus_config_parser_get_servicehelper (parser);
490 s = _dbus_strdup(servicehelper);
491 if (s == NULL && servicehelper != NULL)
498 dbus_free(context->servicehelper);
499 context->servicehelper = s;
502 /* Create activation subsystem */
503 if (context->activation)
505 if (!bus_activation_reload (context->activation, &full_address, dirs, error))
510 context->activation = bus_activation_new (context, &full_address, dirs, error);
513 if (context->activation == NULL)
515 _DBUS_ASSERT_ERROR_IS_SET (error);
519 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
523 _dbus_string_free (&full_address);
532 process_config_postinit (BusContext *context,
533 BusConfigParser *parser,
536 DBusHashTable *service_context_table;
538 service_context_table = bus_config_parser_steal_service_context_table (parser);
539 if (!bus_registry_set_service_context_table (context->registry,
540 service_context_table))
546 _dbus_hash_table_unref (service_context_table);
548 /* Watch all conf directories */
549 bus_set_watched_dirs (context, bus_config_parser_get_conf_dirs (parser));
555 bus_context_new (const DBusString *config_file,
556 ForceForkSetting force_fork,
557 DBusPipe *print_addr_pipe,
558 DBusPipe *print_pid_pipe,
562 BusConfigParser *parser;
564 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
569 if (!dbus_server_allocate_data_slot (&server_data_slot))
575 context = dbus_new0 (BusContext, 1);
581 context->refcount = 1;
583 _dbus_generate_uuid (&context->uuid);
585 if (!_dbus_string_copy_data (config_file, &context->config_file))
591 context->loop = _dbus_loop_new ();
592 if (context->loop == NULL)
598 context->registry = bus_registry_new (context);
599 if (context->registry == NULL)
605 parser = bus_config_load (config_file, TRUE, NULL, error);
608 _DBUS_ASSERT_ERROR_IS_SET (error);
612 if (!process_config_first_time_only (context, parser, error))
614 _DBUS_ASSERT_ERROR_IS_SET (error);
617 if (!process_config_every_time (context, parser, FALSE, error))
619 _DBUS_ASSERT_ERROR_IS_SET (error);
623 /* we need another ref of the server data slot for the context
626 if (!dbus_server_allocate_data_slot (&server_data_slot))
627 _dbus_assert_not_reached ("second ref of server data slot failed");
629 /* Note that we don't know whether the print_addr_pipe is
630 * one of the sockets we're using to listen on, or some
631 * other random thing. But I think the answer is "don't do
634 if (print_addr_pipe != NULL && _dbus_pipe_is_valid (print_addr_pipe))
637 const char *a = bus_context_get_address (context);
640 _dbus_assert (a != NULL);
641 if (!_dbus_string_init (&addr))
647 if (!_dbus_string_append (&addr, a) ||
648 !_dbus_string_append (&addr, "\n"))
650 _dbus_string_free (&addr);
655 bytes = _dbus_string_get_length (&addr);
656 if (_dbus_pipe_write (print_addr_pipe, &addr, 0, bytes, error) != bytes)
658 /* pipe write returns an error on failure but not short write */
659 if (error != NULL && !dbus_error_is_set (error))
661 dbus_set_error (error, DBUS_ERROR_FAILED,
662 "Printing message bus address: did not write all bytes\n");
664 _dbus_string_free (&addr);
668 if (!_dbus_pipe_is_stdout_or_stderr (print_addr_pipe))
669 _dbus_pipe_close (print_addr_pipe, NULL);
671 _dbus_string_free (&addr);
674 context->connections = bus_connections_new (context);
675 if (context->connections == NULL)
681 context->matchmaker = bus_matchmaker_new ();
682 if (context->matchmaker == NULL)
688 /* check user before we fork */
689 if (context->user != NULL)
691 if (!_dbus_verify_daemon_user (context->user))
693 dbus_set_error (error, DBUS_ERROR_FAILED,
694 "Could not get UID and GID for username \"%s\"",
700 /* Now become a daemon if appropriate and write out pid file in any case */
704 if (context->pidfile)
705 _dbus_string_init_const (&u, context->pidfile);
707 if ((force_fork != FORK_NEVER && context->fork) || force_fork == FORK_ALWAYS)
709 _dbus_verbose ("Forking and becoming daemon\n");
711 if (!_dbus_become_daemon (context->pidfile ? &u : NULL,
714 context->keep_umask))
716 _DBUS_ASSERT_ERROR_IS_SET (error);
722 _dbus_verbose ("Fork not requested\n");
724 /* Need to write PID file and to PID pipe for ourselves,
725 * not for the child process. This is a no-op if the pidfile
726 * is NULL and print_pid_pipe is NULL.
728 if (!_dbus_write_pid_to_file_and_pipe (context->pidfile ? &u : NULL,
733 _DBUS_ASSERT_ERROR_IS_SET (error);
739 if (print_pid_pipe && _dbus_pipe_is_valid (print_pid_pipe) &&
740 !_dbus_pipe_is_stdout_or_stderr (print_pid_pipe))
741 _dbus_pipe_close (print_pid_pipe, NULL);
743 if (!bus_selinux_full_init ())
745 _dbus_warn ("SELinux initialization failed\n");
748 if (!process_config_postinit (context, parser, error))
750 _DBUS_ASSERT_ERROR_IS_SET (error);
756 bus_config_parser_unref (parser);
760 /* Here we change our credentials if required,
761 * as soon as we've set up our sockets and pidfile
763 if (context->user != NULL)
765 if (!_dbus_change_to_daemon_user (context->user, error))
767 _DBUS_ASSERT_ERROR_IS_SET (error);
772 /* FIXME - why not just put this in full_init() below? */
773 bus_selinux_audit_init ();
777 dbus_server_free_data_slot (&server_data_slot);
783 bus_config_parser_unref (parser);
785 bus_context_unref (context);
787 if (server_data_slot >= 0)
788 dbus_server_free_data_slot (&server_data_slot);
794 bus_context_get_id (BusContext *context,
797 return _dbus_uuid_encode (&context->uuid, uuid);
801 bus_context_reload_config (BusContext *context,
804 BusConfigParser *parser;
805 DBusString config_file;
808 /* Flush the user database cache */
809 _dbus_flush_caches ();
812 _dbus_string_init_const (&config_file, context->config_file);
813 parser = bus_config_load (&config_file, TRUE, NULL, error);
816 _DBUS_ASSERT_ERROR_IS_SET (error);
820 if (!process_config_every_time (context, parser, TRUE, error))
822 _DBUS_ASSERT_ERROR_IS_SET (error);
825 if (!process_config_postinit (context, parser, error))
827 _DBUS_ASSERT_ERROR_IS_SET (error);
832 bus_context_log_info (context, "Reloaded configuration");
835 bus_context_log_info (context, "Unable to reload configuration: %s", error->message);
837 bus_config_parser_unref (parser);
842 shutdown_server (BusContext *context,
845 if (server == NULL ||
846 !dbus_server_get_is_connected (server))
849 if (!dbus_server_set_watch_functions (server,
853 _dbus_assert_not_reached ("setting watch functions to NULL failed");
855 if (!dbus_server_set_timeout_functions (server,
859 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
861 dbus_server_disconnect (server);
865 bus_context_shutdown (BusContext *context)
869 link = _dbus_list_get_first_link (&context->servers);
872 shutdown_server (context, link->data);
874 link = _dbus_list_get_next_link (&context->servers, link);
879 bus_context_ref (BusContext *context)
881 _dbus_assert (context->refcount > 0);
882 context->refcount += 1;
888 bus_context_unref (BusContext *context)
890 _dbus_assert (context->refcount > 0);
891 context->refcount -= 1;
893 if (context->refcount == 0)
897 _dbus_verbose ("Finalizing bus context %p\n", context);
899 bus_context_shutdown (context);
901 if (context->connections)
903 bus_connections_unref (context->connections);
904 context->connections = NULL;
907 if (context->registry)
909 bus_registry_unref (context->registry);
910 context->registry = NULL;
913 if (context->activation)
915 bus_activation_unref (context->activation);
916 context->activation = NULL;
919 link = _dbus_list_get_first_link (&context->servers);
922 dbus_server_unref (link->data);
924 link = _dbus_list_get_next_link (&context->servers, link);
926 _dbus_list_clear (&context->servers);
930 bus_policy_unref (context->policy);
931 context->policy = NULL;
936 _dbus_loop_unref (context->loop);
937 context->loop = NULL;
940 if (context->matchmaker)
942 bus_matchmaker_unref (context->matchmaker);
943 context->matchmaker = NULL;
946 dbus_free (context->config_file);
947 dbus_free (context->type);
948 dbus_free (context->address);
949 dbus_free (context->user);
950 dbus_free (context->servicehelper);
952 if (context->pidfile)
955 _dbus_string_init_const (&u, context->pidfile);
957 /* Deliberately ignore errors here, since there's not much
958 * we can do about it, and we're exiting anyways.
960 _dbus_delete_file (&u, NULL);
962 dbus_free (context->pidfile);
966 dbus_server_free_data_slot (&server_data_slot);
970 /* type may be NULL */
972 bus_context_get_type (BusContext *context)
974 return context->type;
978 bus_context_get_address (BusContext *context)
980 return context->address;
984 bus_context_get_servicehelper (BusContext *context)
986 return context->servicehelper;
990 bus_context_get_registry (BusContext *context)
992 return context->registry;
996 bus_context_get_connections (BusContext *context)
998 return context->connections;
1002 bus_context_get_activation (BusContext *context)
1004 return context->activation;
1008 bus_context_get_matchmaker (BusContext *context)
1010 return context->matchmaker;
1014 bus_context_get_loop (BusContext *context)
1016 return context->loop;
1020 bus_context_allow_unix_user (BusContext *context,
1023 return bus_policy_allow_unix_user (context->policy,
1027 /* For now this is never actually called because the default
1028 * DBusConnection behavior of 'same user that owns the bus can connect'
1029 * is all it would do.
1032 bus_context_allow_windows_user (BusContext *context,
1033 const char *windows_sid)
1035 return bus_policy_allow_windows_user (context->policy,
1040 bus_context_get_policy (BusContext *context)
1042 return context->policy;
1046 bus_context_create_client_policy (BusContext *context,
1047 DBusConnection *connection,
1050 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1051 return bus_policy_create_client_policy (context->policy, connection,
1056 bus_context_get_activation_timeout (BusContext *context)
1059 return context->limits.activation_timeout;
1063 bus_context_get_auth_timeout (BusContext *context)
1065 return context->limits.auth_timeout;
1069 bus_context_get_max_completed_connections (BusContext *context)
1071 return context->limits.max_completed_connections;
1075 bus_context_get_max_incomplete_connections (BusContext *context)
1077 return context->limits.max_incomplete_connections;
1081 bus_context_get_max_connections_per_user (BusContext *context)
1083 return context->limits.max_connections_per_user;
1087 bus_context_get_max_pending_activations (BusContext *context)
1089 return context->limits.max_pending_activations;
1093 bus_context_get_max_services_per_connection (BusContext *context)
1095 return context->limits.max_services_per_connection;
1099 bus_context_get_max_match_rules_per_connection (BusContext *context)
1101 return context->limits.max_match_rules_per_connection;
1105 bus_context_get_max_replies_per_connection (BusContext *context)
1107 return context->limits.max_replies_per_connection;
1111 bus_context_get_reply_timeout (BusContext *context)
1113 return context->limits.reply_timeout;
1117 bus_context_log_info (BusContext *context, const char *msg, ...)
1121 va_start (args, msg);
1123 if (context->syslog)
1124 _dbus_log_info (msg, args);
1130 bus_context_log_security (BusContext *context, const char *msg, ...)
1134 va_start (args, msg);
1136 if (context->syslog)
1137 _dbus_log_security (msg, args);
1143 * addressed_recipient is the recipient specified in the message.
1145 * proposed_recipient is the recipient we're considering sending
1146 * to right this second, and may be an eavesdropper.
1148 * sender is the sender of the message.
1150 * NULL for proposed_recipient or sender definitely means the bus driver.
1152 * NULL for addressed_recipient may mean the bus driver, or may mean
1153 * no destination was specified in the message (e.g. a signal).
1156 bus_context_check_security_policy (BusContext *context,
1157 BusTransaction *transaction,
1158 DBusConnection *sender,
1159 DBusConnection *addressed_recipient,
1160 DBusConnection *proposed_recipient,
1161 DBusMessage *message,
1165 BusClientPolicy *sender_policy;
1166 BusClientPolicy *recipient_policy;
1167 dbus_int32_t toggles;
1170 dbus_bool_t requested_reply;
1171 const char *sender_name;
1172 const char *sender_loginfo;
1173 const char *proposed_recipient_loginfo;
1175 type = dbus_message_get_type (message);
1176 dest = dbus_message_get_destination (message);
1178 /* dispatch.c was supposed to ensure these invariants */
1179 _dbus_assert (dest != NULL ||
1180 type == DBUS_MESSAGE_TYPE_SIGNAL ||
1181 (sender == NULL && !bus_connection_is_active (proposed_recipient)));
1182 _dbus_assert (type == DBUS_MESSAGE_TYPE_SIGNAL ||
1183 addressed_recipient != NULL ||
1184 strcmp (dest, DBUS_SERVICE_DBUS) == 0);
1186 /* Used in logging below */
1189 sender_name = bus_connection_get_name (sender);
1190 sender_loginfo = bus_connection_get_loginfo (sender);
1195 sender_loginfo = "(bus)";
1198 if (proposed_recipient != NULL)
1199 proposed_recipient_loginfo = bus_connection_get_loginfo (proposed_recipient);
1201 proposed_recipient_loginfo = "bus";
1205 case DBUS_MESSAGE_TYPE_METHOD_CALL:
1206 case DBUS_MESSAGE_TYPE_SIGNAL:
1207 case DBUS_MESSAGE_TYPE_METHOD_RETURN:
1208 case DBUS_MESSAGE_TYPE_ERROR:
1212 _dbus_verbose ("security check disallowing message of unknown type %d\n",
1215 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1216 "Message bus will not accept messages of unknown type\n");
1221 requested_reply = FALSE;
1225 /* First verify the SELinux access controls. If allowed then
1226 * go on with the standard checks.
1228 if (!bus_selinux_allows_send (sender, proposed_recipient,
1229 dbus_message_type_to_string (dbus_message_get_type (message)),
1230 dbus_message_get_interface (message),
1231 dbus_message_get_member (message),
1232 dbus_message_get_error_name (message),
1233 dest ? dest : DBUS_SERVICE_DBUS, error))
1235 if (error != NULL && !dbus_error_is_set (error))
1237 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1238 "An SELinux policy prevents this sender "
1239 "from sending this message to this recipient "
1240 "(rejected message had sender \"%s\" interface \"%s\" "
1241 "member \"%s\" error name \"%s\" destination \"%s\")",
1242 sender_name ? sender_name : "(unset)",
1243 dbus_message_get_interface (message) ?
1244 dbus_message_get_interface (message) : "(unset)",
1245 dbus_message_get_member (message) ?
1246 dbus_message_get_member (message) : "(unset)",
1247 dbus_message_get_error_name (message) ?
1248 dbus_message_get_error_name (message) : "(unset)",
1249 dest ? dest : DBUS_SERVICE_DBUS);
1250 _dbus_verbose ("SELinux security check denying send to service\n");
1256 if (bus_connection_is_active (sender))
1258 sender_policy = bus_connection_get_policy (sender);
1259 _dbus_assert (sender_policy != NULL);
1261 /* Fill in requested_reply variable with TRUE if this is a
1262 * reply and the reply was pending.
1264 if (dbus_message_get_reply_serial (message) != 0)
1266 if (proposed_recipient != NULL /* not to the bus driver */ &&
1267 addressed_recipient == proposed_recipient /* not eavesdropping */)
1271 dbus_error_init (&error2);
1272 requested_reply = bus_connections_check_reply (bus_connection_get_connections (sender),
1274 sender, addressed_recipient, message,
1276 if (dbus_error_is_set (&error2))
1278 dbus_move_error (&error2, error);
1286 /* Policy for inactive connections is that they can only send
1287 * the hello message to the bus driver
1289 if (proposed_recipient == NULL &&
1290 dbus_message_is_method_call (message,
1291 DBUS_INTERFACE_DBUS,
1294 _dbus_verbose ("security check allowing %s message\n",
1300 _dbus_verbose ("security check disallowing non-%s message\n",
1303 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1304 "Client tried to send a message other than %s without being registered",
1313 sender_policy = NULL;
1315 /* If the sender is the bus driver, we assume any reply was a
1316 * requested reply as bus driver won't send bogus ones
1318 if (addressed_recipient == proposed_recipient /* not eavesdropping */ &&
1319 dbus_message_get_reply_serial (message) != 0)
1320 requested_reply = TRUE;
1323 _dbus_assert ((sender != NULL && sender_policy != NULL) ||
1324 (sender == NULL && sender_policy == NULL));
1326 if (proposed_recipient != NULL)
1328 /* only the bus driver can send to an inactive recipient (as it
1329 * owns no services, so other apps can't address it). Inactive
1330 * recipients can receive any message.
1332 if (bus_connection_is_active (proposed_recipient))
1334 recipient_policy = bus_connection_get_policy (proposed_recipient);
1335 _dbus_assert (recipient_policy != NULL);
1337 else if (sender == NULL)
1339 _dbus_verbose ("security check using NULL recipient policy for message from bus\n");
1340 recipient_policy = NULL;
1344 _dbus_assert_not_reached ("a message was somehow sent to an inactive recipient from a source other than the message bus\n");
1345 recipient_policy = NULL;
1349 recipient_policy = NULL;
1351 _dbus_assert ((proposed_recipient != NULL && recipient_policy != NULL) ||
1352 (proposed_recipient != NULL && sender == NULL && recipient_policy == NULL) ||
1353 (proposed_recipient == NULL && recipient_policy == NULL));
1356 if (sender_policy &&
1357 !bus_client_policy_check_can_send (sender_policy,
1361 message, &toggles, &log))
1363 const char *msg = "Rejected send message, %d matched rules; "
1364 "type=\"%s\", sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" requested_reply=%d destination=\"%s\" (%s))";
1366 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, msg,
1368 dbus_message_type_to_string (dbus_message_get_type (message)),
1369 sender_name ? sender_name : "(unset)",
1371 dbus_message_get_interface (message) ?
1372 dbus_message_get_interface (message) : "(unset)",
1373 dbus_message_get_member (message) ?
1374 dbus_message_get_member (message) : "(unset)",
1375 dbus_message_get_error_name (message) ?
1376 dbus_message_get_error_name (message) : "(unset)",
1378 dest ? dest : DBUS_SERVICE_DBUS,
1379 proposed_recipient_loginfo);
1380 /* Needs to be duplicated to avoid calling malloc and having to handle OOM */
1381 if (addressed_recipient == proposed_recipient)
1382 bus_context_log_security (context, msg,
1384 dbus_message_type_to_string (dbus_message_get_type (message)),
1385 sender_name ? sender_name : "(unset)",
1387 dbus_message_get_interface (message) ?
1388 dbus_message_get_interface (message) : "(unset)",
1389 dbus_message_get_member (message) ?
1390 dbus_message_get_member (message) : "(unset)",
1391 dbus_message_get_error_name (message) ?
1392 dbus_message_get_error_name (message) : "(unset)",
1394 dest ? dest : DBUS_SERVICE_DBUS,
1395 proposed_recipient_loginfo);
1396 _dbus_verbose ("security policy disallowing message due to sender policy\n");
1401 bus_context_log_security (context,
1402 "Would reject message, %d matched rules; "
1403 "type=\"%s\", sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" requested_reply=%d destination=\"%s\" (%s))",
1405 dbus_message_type_to_string (dbus_message_get_type (message)),
1406 sender_name ? sender_name : "(unset)",
1408 dbus_message_get_interface (message) ?
1409 dbus_message_get_interface (message) : "(unset)",
1410 dbus_message_get_member (message) ?
1411 dbus_message_get_member (message) : "(unset)",
1412 dbus_message_get_error_name (message) ?
1413 dbus_message_get_error_name (message) : "(unset)",
1415 dest ? dest : DBUS_SERVICE_DBUS,
1416 proposed_recipient_loginfo);
1418 if (recipient_policy &&
1419 !bus_client_policy_check_can_receive (recipient_policy,
1423 addressed_recipient, proposed_recipient,
1426 const char *msg = "Rejected receive message, %d matched rules; "
1427 "type=\"%s\" sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" reply serial=%u requested_reply=%d destination=\"%s\" (%s))";
1429 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, msg,
1431 dbus_message_type_to_string (dbus_message_get_type (message)),
1432 sender_name ? sender_name : "(unset)",
1434 dbus_message_get_interface (message) ?
1435 dbus_message_get_interface (message) : "(unset)",
1436 dbus_message_get_member (message) ?
1437 dbus_message_get_member (message) : "(unset)",
1438 dbus_message_get_error_name (message) ?
1439 dbus_message_get_error_name (message) : "(unset)",
1440 dbus_message_get_reply_serial (message),
1442 dest ? dest : DBUS_SERVICE_DBUS,
1443 proposed_recipient_loginfo);
1444 /* Needs to be duplicated to avoid calling malloc and having to handle OOM */
1445 if (addressed_recipient == proposed_recipient)
1446 bus_context_log_security (context, msg,
1448 dbus_message_type_to_string (dbus_message_get_type (message)),
1449 sender_name ? sender_name : "(unset)",
1451 dbus_message_get_interface (message) ?
1452 dbus_message_get_interface (message) : "(unset)",
1453 dbus_message_get_member (message) ?
1454 dbus_message_get_member (message) : "(unset)",
1455 dbus_message_get_error_name (message) ?
1456 dbus_message_get_error_name (message) : "(unset)",
1457 dbus_message_get_reply_serial (message),
1459 dest ? dest : DBUS_SERVICE_DBUS,
1460 proposed_recipient_loginfo);
1461 _dbus_verbose ("security policy disallowing message due to recipient policy\n");
1465 /* See if limits on size have been exceeded */
1466 if (proposed_recipient &&
1467 dbus_connection_get_outgoing_size (proposed_recipient) >
1468 context->limits.max_outgoing_bytes)
1470 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1471 "The destination service \"%s\" has a full message queue",
1472 dest ? dest : (proposed_recipient ?
1473 bus_connection_get_name (proposed_recipient) :
1474 DBUS_SERVICE_DBUS));
1475 _dbus_verbose ("security policy disallowing message due to full message queue\n");
1479 /* Record that we will allow a reply here in the future (don't
1480 * bother if the recipient is the bus or this is an eavesdropping
1481 * connection). Only the addressed recipient may reply.
1483 if (type == DBUS_MESSAGE_TYPE_METHOD_CALL &&
1485 addressed_recipient &&
1486 addressed_recipient == proposed_recipient && /* not eavesdropping */
1487 !bus_connections_expect_reply (bus_connection_get_connections (sender),
1489 sender, addressed_recipient,
1492 _dbus_verbose ("Failed to record reply expectation or problem with the message expecting a reply\n");
1496 _dbus_verbose ("security policy allowing message\n");