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_shutdown_all_directory_watches (void *data)
557 bus_set_watched_dirs ((BusContext *) data, NULL);
561 bus_context_new (const DBusString *config_file,
562 ForceForkSetting force_fork,
563 DBusPipe *print_addr_pipe,
564 DBusPipe *print_pid_pipe,
568 BusConfigParser *parser;
570 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
575 if (!dbus_server_allocate_data_slot (&server_data_slot))
581 context = dbus_new0 (BusContext, 1);
587 context->refcount = 1;
589 _dbus_generate_uuid (&context->uuid);
591 _dbus_register_shutdown_func (bus_shutdown_all_directory_watches, context);
593 if (!_dbus_string_copy_data (config_file, &context->config_file))
599 context->loop = _dbus_loop_new ();
600 if (context->loop == NULL)
606 context->registry = bus_registry_new (context);
607 if (context->registry == NULL)
613 parser = bus_config_load (config_file, TRUE, NULL, error);
616 _DBUS_ASSERT_ERROR_IS_SET (error);
620 if (!process_config_first_time_only (context, parser, error))
622 _DBUS_ASSERT_ERROR_IS_SET (error);
625 if (!process_config_every_time (context, parser, FALSE, error))
627 _DBUS_ASSERT_ERROR_IS_SET (error);
631 /* we need another ref of the server data slot for the context
634 if (!dbus_server_allocate_data_slot (&server_data_slot))
635 _dbus_assert_not_reached ("second ref of server data slot failed");
637 /* Note that we don't know whether the print_addr_pipe is
638 * one of the sockets we're using to listen on, or some
639 * other random thing. But I think the answer is "don't do
642 if (print_addr_pipe != NULL && _dbus_pipe_is_valid (print_addr_pipe))
645 const char *a = bus_context_get_address (context);
648 _dbus_assert (a != NULL);
649 if (!_dbus_string_init (&addr))
655 if (!_dbus_string_append (&addr, a) ||
656 !_dbus_string_append (&addr, "\n"))
658 _dbus_string_free (&addr);
663 bytes = _dbus_string_get_length (&addr);
664 if (_dbus_pipe_write (print_addr_pipe, &addr, 0, bytes, error) != bytes)
666 /* pipe write returns an error on failure but not short write */
667 if (error != NULL && !dbus_error_is_set (error))
669 dbus_set_error (error, DBUS_ERROR_FAILED,
670 "Printing message bus address: did not write all bytes\n");
672 _dbus_string_free (&addr);
676 if (!_dbus_pipe_is_stdout_or_stderr (print_addr_pipe))
677 _dbus_pipe_close (print_addr_pipe, NULL);
679 _dbus_string_free (&addr);
682 context->connections = bus_connections_new (context);
683 if (context->connections == NULL)
689 context->matchmaker = bus_matchmaker_new ();
690 if (context->matchmaker == NULL)
696 /* check user before we fork */
697 if (context->user != NULL)
699 if (!_dbus_verify_daemon_user (context->user))
701 dbus_set_error (error, DBUS_ERROR_FAILED,
702 "Could not get UID and GID for username \"%s\"",
708 /* Now become a daemon if appropriate and write out pid file in any case */
712 if (context->pidfile)
713 _dbus_string_init_const (&u, context->pidfile);
715 if ((force_fork != FORK_NEVER && context->fork) || force_fork == FORK_ALWAYS)
717 _dbus_verbose ("Forking and becoming daemon\n");
719 if (!_dbus_become_daemon (context->pidfile ? &u : NULL,
722 context->keep_umask))
724 _DBUS_ASSERT_ERROR_IS_SET (error);
730 _dbus_verbose ("Fork not requested\n");
732 /* Need to write PID file and to PID pipe for ourselves,
733 * not for the child process. This is a no-op if the pidfile
734 * is NULL and print_pid_pipe is NULL.
736 if (!_dbus_write_pid_to_file_and_pipe (context->pidfile ? &u : NULL,
741 _DBUS_ASSERT_ERROR_IS_SET (error);
747 if (print_pid_pipe && _dbus_pipe_is_valid (print_pid_pipe) &&
748 !_dbus_pipe_is_stdout_or_stderr (print_pid_pipe))
749 _dbus_pipe_close (print_pid_pipe, NULL);
751 if (!bus_selinux_full_init ())
753 _dbus_warn ("SELinux initialization failed\n");
756 if (!process_config_postinit (context, parser, error))
758 _DBUS_ASSERT_ERROR_IS_SET (error);
764 bus_config_parser_unref (parser);
768 /* Here we change our credentials if required,
769 * as soon as we've set up our sockets and pidfile
771 if (context->user != NULL)
773 if (!_dbus_change_to_daemon_user (context->user, error))
775 _DBUS_ASSERT_ERROR_IS_SET (error);
780 /* FIXME - why not just put this in full_init() below? */
781 bus_selinux_audit_init ();
785 dbus_server_free_data_slot (&server_data_slot);
791 bus_config_parser_unref (parser);
793 bus_context_unref (context);
795 if (server_data_slot >= 0)
796 dbus_server_free_data_slot (&server_data_slot);
802 bus_context_get_id (BusContext *context,
805 return _dbus_uuid_encode (&context->uuid, uuid);
809 bus_context_reload_config (BusContext *context,
812 BusConfigParser *parser;
813 DBusString config_file;
816 /* Flush the user database cache */
817 _dbus_flush_caches ();
820 _dbus_string_init_const (&config_file, context->config_file);
821 parser = bus_config_load (&config_file, TRUE, NULL, error);
824 _DBUS_ASSERT_ERROR_IS_SET (error);
828 if (!process_config_every_time (context, parser, TRUE, error))
830 _DBUS_ASSERT_ERROR_IS_SET (error);
833 if (!process_config_postinit (context, parser, error))
835 _DBUS_ASSERT_ERROR_IS_SET (error);
840 bus_context_log_info (context, "Reloaded configuration");
843 bus_context_log_info (context, "Unable to reload configuration: %s", error->message);
845 bus_config_parser_unref (parser);
850 shutdown_server (BusContext *context,
853 if (server == NULL ||
854 !dbus_server_get_is_connected (server))
857 if (!dbus_server_set_watch_functions (server,
861 _dbus_assert_not_reached ("setting watch functions to NULL failed");
863 if (!dbus_server_set_timeout_functions (server,
867 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
869 dbus_server_disconnect (server);
873 bus_context_shutdown (BusContext *context)
877 link = _dbus_list_get_first_link (&context->servers);
880 shutdown_server (context, link->data);
882 link = _dbus_list_get_next_link (&context->servers, link);
887 bus_context_ref (BusContext *context)
889 _dbus_assert (context->refcount > 0);
890 context->refcount += 1;
896 bus_context_unref (BusContext *context)
898 _dbus_assert (context->refcount > 0);
899 context->refcount -= 1;
901 if (context->refcount == 0)
905 _dbus_verbose ("Finalizing bus context %p\n", context);
907 bus_context_shutdown (context);
909 if (context->connections)
911 bus_connections_unref (context->connections);
912 context->connections = NULL;
915 if (context->registry)
917 bus_registry_unref (context->registry);
918 context->registry = NULL;
921 if (context->activation)
923 bus_activation_unref (context->activation);
924 context->activation = NULL;
927 link = _dbus_list_get_first_link (&context->servers);
930 dbus_server_unref (link->data);
932 link = _dbus_list_get_next_link (&context->servers, link);
934 _dbus_list_clear (&context->servers);
938 bus_policy_unref (context->policy);
939 context->policy = NULL;
944 _dbus_loop_unref (context->loop);
945 context->loop = NULL;
948 if (context->matchmaker)
950 bus_matchmaker_unref (context->matchmaker);
951 context->matchmaker = NULL;
954 dbus_free (context->config_file);
955 dbus_free (context->type);
956 dbus_free (context->address);
957 dbus_free (context->user);
958 dbus_free (context->servicehelper);
960 if (context->pidfile)
963 _dbus_string_init_const (&u, context->pidfile);
965 /* Deliberately ignore errors here, since there's not much
966 * we can do about it, and we're exiting anyways.
968 _dbus_delete_file (&u, NULL);
970 dbus_free (context->pidfile);
974 dbus_server_free_data_slot (&server_data_slot);
978 /* type may be NULL */
980 bus_context_get_type (BusContext *context)
982 return context->type;
986 bus_context_get_address (BusContext *context)
988 return context->address;
992 bus_context_get_servicehelper (BusContext *context)
994 return context->servicehelper;
998 bus_context_get_registry (BusContext *context)
1000 return context->registry;
1004 bus_context_get_connections (BusContext *context)
1006 return context->connections;
1010 bus_context_get_activation (BusContext *context)
1012 return context->activation;
1016 bus_context_get_matchmaker (BusContext *context)
1018 return context->matchmaker;
1022 bus_context_get_loop (BusContext *context)
1024 return context->loop;
1028 bus_context_allow_unix_user (BusContext *context,
1031 return bus_policy_allow_unix_user (context->policy,
1035 /* For now this is never actually called because the default
1036 * DBusConnection behavior of 'same user that owns the bus can connect'
1037 * is all it would do.
1040 bus_context_allow_windows_user (BusContext *context,
1041 const char *windows_sid)
1043 return bus_policy_allow_windows_user (context->policy,
1048 bus_context_get_policy (BusContext *context)
1050 return context->policy;
1054 bus_context_create_client_policy (BusContext *context,
1055 DBusConnection *connection,
1058 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1059 return bus_policy_create_client_policy (context->policy, connection,
1064 bus_context_get_activation_timeout (BusContext *context)
1067 return context->limits.activation_timeout;
1071 bus_context_get_auth_timeout (BusContext *context)
1073 return context->limits.auth_timeout;
1077 bus_context_get_max_completed_connections (BusContext *context)
1079 return context->limits.max_completed_connections;
1083 bus_context_get_max_incomplete_connections (BusContext *context)
1085 return context->limits.max_incomplete_connections;
1089 bus_context_get_max_connections_per_user (BusContext *context)
1091 return context->limits.max_connections_per_user;
1095 bus_context_get_max_pending_activations (BusContext *context)
1097 return context->limits.max_pending_activations;
1101 bus_context_get_max_services_per_connection (BusContext *context)
1103 return context->limits.max_services_per_connection;
1107 bus_context_get_max_match_rules_per_connection (BusContext *context)
1109 return context->limits.max_match_rules_per_connection;
1113 bus_context_get_max_replies_per_connection (BusContext *context)
1115 return context->limits.max_replies_per_connection;
1119 bus_context_get_reply_timeout (BusContext *context)
1121 return context->limits.reply_timeout;
1125 bus_context_log_info (BusContext *context, const char *msg, ...)
1129 va_start (args, msg);
1131 if (context->syslog)
1132 _dbus_log_info (msg, args);
1138 bus_context_log_security (BusContext *context, const char *msg, ...)
1142 va_start (args, msg);
1144 if (context->syslog)
1145 _dbus_log_security (msg, args);
1151 * addressed_recipient is the recipient specified in the message.
1153 * proposed_recipient is the recipient we're considering sending
1154 * to right this second, and may be an eavesdropper.
1156 * sender is the sender of the message.
1158 * NULL for proposed_recipient or sender definitely means the bus driver.
1160 * NULL for addressed_recipient may mean the bus driver, or may mean
1161 * no destination was specified in the message (e.g. a signal).
1164 bus_context_check_security_policy (BusContext *context,
1165 BusTransaction *transaction,
1166 DBusConnection *sender,
1167 DBusConnection *addressed_recipient,
1168 DBusConnection *proposed_recipient,
1169 DBusMessage *message,
1173 BusClientPolicy *sender_policy;
1174 BusClientPolicy *recipient_policy;
1175 dbus_int32_t toggles;
1178 dbus_bool_t requested_reply;
1179 const char *sender_name;
1180 const char *sender_loginfo;
1181 const char *proposed_recipient_loginfo;
1183 type = dbus_message_get_type (message);
1184 dest = dbus_message_get_destination (message);
1186 /* dispatch.c was supposed to ensure these invariants */
1187 _dbus_assert (dest != NULL ||
1188 type == DBUS_MESSAGE_TYPE_SIGNAL ||
1189 (sender == NULL && !bus_connection_is_active (proposed_recipient)));
1190 _dbus_assert (type == DBUS_MESSAGE_TYPE_SIGNAL ||
1191 addressed_recipient != NULL ||
1192 strcmp (dest, DBUS_SERVICE_DBUS) == 0);
1194 /* Used in logging below */
1197 sender_name = bus_connection_get_name (sender);
1198 sender_loginfo = bus_connection_get_loginfo (sender);
1203 sender_loginfo = "(bus)";
1206 if (proposed_recipient != NULL)
1207 proposed_recipient_loginfo = bus_connection_get_loginfo (proposed_recipient);
1209 proposed_recipient_loginfo = "bus";
1213 case DBUS_MESSAGE_TYPE_METHOD_CALL:
1214 case DBUS_MESSAGE_TYPE_SIGNAL:
1215 case DBUS_MESSAGE_TYPE_METHOD_RETURN:
1216 case DBUS_MESSAGE_TYPE_ERROR:
1220 _dbus_verbose ("security check disallowing message of unknown type %d\n",
1223 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1224 "Message bus will not accept messages of unknown type\n");
1229 requested_reply = FALSE;
1233 /* First verify the SELinux access controls. If allowed then
1234 * go on with the standard checks.
1236 if (!bus_selinux_allows_send (sender, proposed_recipient,
1237 dbus_message_type_to_string (dbus_message_get_type (message)),
1238 dbus_message_get_interface (message),
1239 dbus_message_get_member (message),
1240 dbus_message_get_error_name (message),
1241 dest ? dest : DBUS_SERVICE_DBUS, error))
1243 if (error != NULL && !dbus_error_is_set (error))
1245 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1246 "An SELinux policy prevents this sender "
1247 "from sending this message to this recipient "
1248 "(rejected message had sender \"%s\" interface \"%s\" "
1249 "member \"%s\" error name \"%s\" destination \"%s\")",
1250 sender_name ? sender_name : "(unset)",
1251 dbus_message_get_interface (message) ?
1252 dbus_message_get_interface (message) : "(unset)",
1253 dbus_message_get_member (message) ?
1254 dbus_message_get_member (message) : "(unset)",
1255 dbus_message_get_error_name (message) ?
1256 dbus_message_get_error_name (message) : "(unset)",
1257 dest ? dest : DBUS_SERVICE_DBUS);
1258 _dbus_verbose ("SELinux security check denying send to service\n");
1264 if (bus_connection_is_active (sender))
1266 sender_policy = bus_connection_get_policy (sender);
1267 _dbus_assert (sender_policy != NULL);
1269 /* Fill in requested_reply variable with TRUE if this is a
1270 * reply and the reply was pending.
1272 if (dbus_message_get_reply_serial (message) != 0)
1274 if (proposed_recipient != NULL /* not to the bus driver */ &&
1275 addressed_recipient == proposed_recipient /* not eavesdropping */)
1279 dbus_error_init (&error2);
1280 requested_reply = bus_connections_check_reply (bus_connection_get_connections (sender),
1282 sender, addressed_recipient, message,
1284 if (dbus_error_is_set (&error2))
1286 dbus_move_error (&error2, error);
1294 /* Policy for inactive connections is that they can only send
1295 * the hello message to the bus driver
1297 if (proposed_recipient == NULL &&
1298 dbus_message_is_method_call (message,
1299 DBUS_INTERFACE_DBUS,
1302 _dbus_verbose ("security check allowing %s message\n",
1308 _dbus_verbose ("security check disallowing non-%s message\n",
1311 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1312 "Client tried to send a message other than %s without being registered",
1321 sender_policy = NULL;
1323 /* If the sender is the bus driver, we assume any reply was a
1324 * requested reply as bus driver won't send bogus ones
1326 if (addressed_recipient == proposed_recipient /* not eavesdropping */ &&
1327 dbus_message_get_reply_serial (message) != 0)
1328 requested_reply = TRUE;
1331 _dbus_assert ((sender != NULL && sender_policy != NULL) ||
1332 (sender == NULL && sender_policy == NULL));
1334 if (proposed_recipient != NULL)
1336 /* only the bus driver can send to an inactive recipient (as it
1337 * owns no services, so other apps can't address it). Inactive
1338 * recipients can receive any message.
1340 if (bus_connection_is_active (proposed_recipient))
1342 recipient_policy = bus_connection_get_policy (proposed_recipient);
1343 _dbus_assert (recipient_policy != NULL);
1345 else if (sender == NULL)
1347 _dbus_verbose ("security check using NULL recipient policy for message from bus\n");
1348 recipient_policy = NULL;
1352 _dbus_assert_not_reached ("a message was somehow sent to an inactive recipient from a source other than the message bus\n");
1353 recipient_policy = NULL;
1357 recipient_policy = NULL;
1359 _dbus_assert ((proposed_recipient != NULL && recipient_policy != NULL) ||
1360 (proposed_recipient != NULL && sender == NULL && recipient_policy == NULL) ||
1361 (proposed_recipient == NULL && recipient_policy == NULL));
1364 if (sender_policy &&
1365 !bus_client_policy_check_can_send (sender_policy,
1369 message, &toggles, &log))
1371 const char *msg = "Rejected send message, %d matched rules; "
1372 "type=\"%s\", sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" requested_reply=%d destination=\"%s\" (%s))";
1374 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, msg,
1376 dbus_message_type_to_string (dbus_message_get_type (message)),
1377 sender_name ? sender_name : "(unset)",
1379 dbus_message_get_interface (message) ?
1380 dbus_message_get_interface (message) : "(unset)",
1381 dbus_message_get_member (message) ?
1382 dbus_message_get_member (message) : "(unset)",
1383 dbus_message_get_error_name (message) ?
1384 dbus_message_get_error_name (message) : "(unset)",
1386 dest ? dest : DBUS_SERVICE_DBUS,
1387 proposed_recipient_loginfo);
1388 /* Needs to be duplicated to avoid calling malloc and having to handle OOM */
1389 if (addressed_recipient == proposed_recipient)
1390 bus_context_log_security (context, msg,
1392 dbus_message_type_to_string (dbus_message_get_type (message)),
1393 sender_name ? sender_name : "(unset)",
1395 dbus_message_get_interface (message) ?
1396 dbus_message_get_interface (message) : "(unset)",
1397 dbus_message_get_member (message) ?
1398 dbus_message_get_member (message) : "(unset)",
1399 dbus_message_get_error_name (message) ?
1400 dbus_message_get_error_name (message) : "(unset)",
1402 dest ? dest : DBUS_SERVICE_DBUS,
1403 proposed_recipient_loginfo);
1404 _dbus_verbose ("security policy disallowing message due to sender policy\n");
1409 bus_context_log_security (context,
1410 "Would reject message, %d matched rules; "
1411 "type=\"%s\", sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" requested_reply=%d destination=\"%s\" (%s))",
1413 dbus_message_type_to_string (dbus_message_get_type (message)),
1414 sender_name ? sender_name : "(unset)",
1416 dbus_message_get_interface (message) ?
1417 dbus_message_get_interface (message) : "(unset)",
1418 dbus_message_get_member (message) ?
1419 dbus_message_get_member (message) : "(unset)",
1420 dbus_message_get_error_name (message) ?
1421 dbus_message_get_error_name (message) : "(unset)",
1423 dest ? dest : DBUS_SERVICE_DBUS,
1424 proposed_recipient_loginfo);
1426 if (recipient_policy &&
1427 !bus_client_policy_check_can_receive (recipient_policy,
1431 addressed_recipient, proposed_recipient,
1434 const char *msg = "Rejected receive message, %d matched rules; "
1435 "type=\"%s\" sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" reply serial=%u requested_reply=%d destination=\"%s\" (%s))";
1437 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, msg,
1439 dbus_message_type_to_string (dbus_message_get_type (message)),
1440 sender_name ? sender_name : "(unset)",
1442 dbus_message_get_interface (message) ?
1443 dbus_message_get_interface (message) : "(unset)",
1444 dbus_message_get_member (message) ?
1445 dbus_message_get_member (message) : "(unset)",
1446 dbus_message_get_error_name (message) ?
1447 dbus_message_get_error_name (message) : "(unset)",
1448 dbus_message_get_reply_serial (message),
1450 dest ? dest : DBUS_SERVICE_DBUS,
1451 proposed_recipient_loginfo);
1452 /* Needs to be duplicated to avoid calling malloc and having to handle OOM */
1453 if (addressed_recipient == proposed_recipient)
1454 bus_context_log_security (context, msg,
1456 dbus_message_type_to_string (dbus_message_get_type (message)),
1457 sender_name ? sender_name : "(unset)",
1459 dbus_message_get_interface (message) ?
1460 dbus_message_get_interface (message) : "(unset)",
1461 dbus_message_get_member (message) ?
1462 dbus_message_get_member (message) : "(unset)",
1463 dbus_message_get_error_name (message) ?
1464 dbus_message_get_error_name (message) : "(unset)",
1465 dbus_message_get_reply_serial (message),
1467 dest ? dest : DBUS_SERVICE_DBUS,
1468 proposed_recipient_loginfo);
1469 _dbus_verbose ("security policy disallowing message due to recipient policy\n");
1473 /* See if limits on size have been exceeded */
1474 if (proposed_recipient &&
1475 dbus_connection_get_outgoing_size (proposed_recipient) >
1476 context->limits.max_outgoing_bytes)
1478 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1479 "The destination service \"%s\" has a full message queue",
1480 dest ? dest : (proposed_recipient ?
1481 bus_connection_get_name (proposed_recipient) :
1482 DBUS_SERVICE_DBUS));
1483 _dbus_verbose ("security policy disallowing message due to full message queue\n");
1487 /* Record that we will allow a reply here in the future (don't
1488 * bother if the recipient is the bus or this is an eavesdropping
1489 * connection). Only the addressed recipient may reply.
1491 if (type == DBUS_MESSAGE_TYPE_METHOD_CALL &&
1493 addressed_recipient &&
1494 addressed_recipient == proposed_recipient && /* not eavesdropping */
1495 !bus_connections_expect_reply (bus_connection_get_connections (sender),
1497 sender, addressed_recipient,
1500 _dbus_verbose ("Failed to record reply expectation or problem with the message expecting a reply\n");
1504 _dbus_verbose ("security policy allowing message\n");