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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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;
60 static dbus_int32_t server_data_slot = -1;
67 #define BUS_SERVER_DATA(server) (dbus_server_get_data ((server), server_data_slot))
70 server_get_context (DBusServer *server)
75 if (!dbus_server_allocate_data_slot (&server_data_slot))
78 bd = BUS_SERVER_DATA (server);
81 dbus_server_free_data_slot (&server_data_slot);
85 context = bd->context;
87 dbus_server_free_data_slot (&server_data_slot);
93 server_watch_callback (DBusWatch *watch,
94 unsigned int condition,
97 /* FIXME this can be done in dbus-mainloop.c
98 * if the code in activation.c for the babysitter
99 * watch handler is fixed.
102 return dbus_watch_handle (watch, condition);
106 add_server_watch (DBusWatch *watch,
109 DBusServer *server = data;
112 context = server_get_context (server);
114 return _dbus_loop_add_watch (context->loop,
115 watch, server_watch_callback, server,
120 remove_server_watch (DBusWatch *watch,
123 DBusServer *server = data;
126 context = server_get_context (server);
128 _dbus_loop_remove_watch (context->loop,
129 watch, server_watch_callback, server);
134 server_timeout_callback (DBusTimeout *timeout,
137 /* can return FALSE on OOM but we just let it fire again later */
138 dbus_timeout_handle (timeout);
142 add_server_timeout (DBusTimeout *timeout,
145 DBusServer *server = data;
148 context = server_get_context (server);
150 return _dbus_loop_add_timeout (context->loop,
151 timeout, server_timeout_callback, server, NULL);
155 remove_server_timeout (DBusTimeout *timeout,
158 DBusServer *server = data;
161 context = server_get_context (server);
163 _dbus_loop_remove_timeout (context->loop,
164 timeout, server_timeout_callback, server);
168 new_connection_callback (DBusServer *server,
169 DBusConnection *new_connection,
172 BusContext *context = data;
174 if (!bus_connections_setup_connection (context->connections, new_connection))
176 _dbus_verbose ("No memory to setup new connection\n");
178 /* if we don't do this, it will get unref'd without
179 * being disconnected... kind of strange really
180 * that we have to do this, people won't get it right
183 dbus_connection_close (new_connection);
186 dbus_connection_set_max_received_size (new_connection,
187 context->limits.max_incoming_bytes);
189 dbus_connection_set_max_message_size (new_connection,
190 context->limits.max_message_size);
192 /* on OOM, we won't have ref'd the connection so it will die. */
196 free_server_data (void *data)
198 BusServerData *bd = data;
204 setup_server (BusContext *context,
206 char **auth_mechanisms,
211 bd = dbus_new0 (BusServerData, 1);
212 if (bd == NULL || !dbus_server_set_data (server,
214 bd, free_server_data))
221 bd->context = context;
223 if (!dbus_server_set_auth_mechanisms (server, (const char**) auth_mechanisms))
229 dbus_server_set_new_connection_function (server,
230 new_connection_callback,
233 if (!dbus_server_set_watch_functions (server,
244 if (!dbus_server_set_timeout_functions (server,
246 remove_server_timeout,
257 /* This code only gets executed the first time the
258 * config files are parsed. It is not executed
259 * when config files are reloaded.
262 process_config_first_time_only (BusContext *context,
263 BusConfigParser *parser,
267 DBusList **addresses;
268 const char *user, *pidfile;
269 char **auth_mechanisms;
270 DBusList **auth_mechanisms_list;
274 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
277 auth_mechanisms = NULL;
279 /* Check for an existing pid file. Of course this is a race;
280 * we'd have to use fcntl() locks on the pid file to
281 * avoid that. But we want to check for the pid file
282 * before overwriting any existing sockets, etc.
284 pidfile = bus_config_parser_get_pidfile (parser);
290 _dbus_string_init_const (&u, pidfile);
292 if (_dbus_stat (&u, &stbuf, NULL))
294 dbus_set_error (error, DBUS_ERROR_FAILED,
295 "The pid file \"%s\" exists, if the message bus is not running, remove this file",
301 /* keep around the pid filename so we can delete it later */
302 context->pidfile = _dbus_strdup (pidfile);
304 /* Build an array of auth mechanisms */
306 auth_mechanisms_list = bus_config_parser_get_mechanisms (parser);
307 len = _dbus_list_get_length (auth_mechanisms_list);
313 auth_mechanisms = dbus_new0 (char*, len + 1);
314 if (auth_mechanisms == NULL)
321 link = _dbus_list_get_first_link (auth_mechanisms_list);
324 auth_mechanisms[i] = _dbus_strdup (link->data);
325 if (auth_mechanisms[i] == NULL)
330 link = _dbus_list_get_next_link (auth_mechanisms_list, link);
335 auth_mechanisms = NULL;
338 /* Listen on our addresses */
340 addresses = bus_config_parser_get_addresses (parser);
342 link = _dbus_list_get_first_link (addresses);
347 server = dbus_server_listen (link->data, error);
350 _DBUS_ASSERT_ERROR_IS_SET (error);
353 else if (!setup_server (context, server, auth_mechanisms, error))
355 _DBUS_ASSERT_ERROR_IS_SET (error);
359 if (!_dbus_list_append (&context->servers, server))
365 link = _dbus_list_get_next_link (addresses, link);
368 /* note that type may be NULL */
369 context->type = _dbus_strdup (bus_config_parser_get_type (parser));
370 if (bus_config_parser_get_type (parser) != NULL && context->type == NULL)
376 user = bus_config_parser_get_user (parser);
379 context->user = _dbus_strdup (user);
380 if (context->user == NULL)
387 context->fork = bus_config_parser_get_fork (parser);
388 context->syslog = bus_config_parser_get_syslog (parser);
390 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
394 dbus_free_string_array (auth_mechanisms);
398 /* This code gets executed every time the config files
399 * are parsed: both during BusContext construction
400 * and on reloads. This function is slightly screwy
401 * since it can do a "half reload" in out-of-memory
402 * situations. Realistically, unlikely to ever matter.
405 process_config_every_time (BusContext *context,
406 BusConfigParser *parser,
407 dbus_bool_t is_reload,
410 DBusString full_address;
413 BusActivation *new_activation;
415 const char *servicehelper;
420 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
425 if (!_dbus_string_init (&full_address))
431 /* get our limits and timeout lengths */
432 bus_config_parser_get_limits (parser, &context->limits);
434 context->policy = bus_config_parser_steal_policy (parser);
435 _dbus_assert (context->policy != NULL);
437 /* We have to build the address backward, so that
438 * <listen> later in the config file have priority
440 link = _dbus_list_get_last_link (&context->servers);
443 addr = dbus_server_get_address (link->data);
450 if (_dbus_string_get_length (&full_address) > 0)
452 if (!_dbus_string_append (&full_address, ";"))
459 if (!_dbus_string_append (&full_address, addr))
468 link = _dbus_list_get_prev_link (&context->servers, link);
472 dbus_free (context->address);
474 if (!_dbus_string_copy_data (&full_address, &context->address))
480 /* get the service directories */
481 dirs = bus_config_parser_get_service_dirs (parser);
483 /* and the service helper */
484 servicehelper = bus_config_parser_get_servicehelper (parser);
486 s = _dbus_strdup(servicehelper);
487 if (s == NULL && servicehelper != NULL)
494 dbus_free(context->servicehelper);
495 context->servicehelper = s;
498 /* Create activation subsystem */
499 new_activation = bus_activation_new (context, &full_address,
501 if (new_activation == NULL)
503 _DBUS_ASSERT_ERROR_IS_SET (error);
508 bus_activation_unref (context->activation);
510 context->activation = new_activation;
512 /* Drop existing conf-dir watches (if applicable) */
515 bus_drop_all_directory_watches ();
517 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
521 _dbus_string_free (&full_address);
530 process_config_postinit (BusContext *context,
531 BusConfigParser *parser,
534 DBusHashTable *service_context_table;
536 service_context_table = bus_config_parser_steal_service_context_table (parser);
537 if (!bus_registry_set_service_context_table (context->registry,
538 service_context_table))
544 _dbus_hash_table_unref (service_context_table);
546 /* Watch all conf directories */
547 _dbus_list_foreach (bus_config_parser_get_conf_dirs (parser),
548 (DBusForeachFunction) bus_watch_directory,
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,
715 _DBUS_ASSERT_ERROR_IS_SET (error);
721 _dbus_verbose ("Fork not requested\n");
723 /* Need to write PID file and to PID pipe for ourselves,
724 * not for the child process. This is a no-op if the pidfile
725 * is NULL and print_pid_pipe is NULL.
727 if (!_dbus_write_pid_to_file_and_pipe (context->pidfile ? &u : NULL,
732 _DBUS_ASSERT_ERROR_IS_SET (error);
738 if (print_pid_pipe && _dbus_pipe_is_valid (print_pid_pipe) &&
739 !_dbus_pipe_is_stdout_or_stderr (print_pid_pipe))
740 _dbus_pipe_close (print_pid_pipe, NULL);
742 if (!process_config_postinit (context, parser, error))
744 _DBUS_ASSERT_ERROR_IS_SET (error);
750 bus_config_parser_unref (parser);
754 /* Here we change our credentials if required,
755 * as soon as we've set up our sockets and pidfile
757 if (context->user != NULL)
759 if (!_dbus_change_to_daemon_user (context->user, error))
761 _DBUS_ASSERT_ERROR_IS_SET (error);
766 /* FIXME - why not just put this in full_init() below? */
767 bus_selinux_audit_init ();
771 if (!bus_selinux_full_init ())
773 _dbus_warn ("SELinux initialization failed\n");
776 dbus_server_free_data_slot (&server_data_slot);
782 bus_config_parser_unref (parser);
784 bus_context_unref (context);
786 if (server_data_slot >= 0)
787 dbus_server_free_data_slot (&server_data_slot);
793 bus_context_get_id (BusContext *context,
796 return _dbus_uuid_encode (&context->uuid, uuid);
800 bus_context_reload_config (BusContext *context,
803 BusConfigParser *parser;
804 DBusString config_file;
807 /* Flush the user database cache */
808 _dbus_flush_caches ();
811 _dbus_string_init_const (&config_file, context->config_file);
812 parser = bus_config_load (&config_file, TRUE, NULL, error);
815 _DBUS_ASSERT_ERROR_IS_SET (error);
819 if (!process_config_every_time (context, parser, TRUE, error))
821 _DBUS_ASSERT_ERROR_IS_SET (error);
824 if (!process_config_postinit (context, parser, error))
826 _DBUS_ASSERT_ERROR_IS_SET (error);
831 bus_context_log_info (context, "Reloaded configuration");
834 bus_context_log_info (context, "Unable to reload configuration: %s", error->message);
836 bus_config_parser_unref (parser);
841 shutdown_server (BusContext *context,
844 if (server == NULL ||
845 !dbus_server_get_is_connected (server))
848 if (!dbus_server_set_watch_functions (server,
852 _dbus_assert_not_reached ("setting watch functions to NULL failed");
854 if (!dbus_server_set_timeout_functions (server,
858 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
860 dbus_server_disconnect (server);
864 bus_context_shutdown (BusContext *context)
868 link = _dbus_list_get_first_link (&context->servers);
871 shutdown_server (context, link->data);
873 link = _dbus_list_get_next_link (&context->servers, link);
878 bus_context_ref (BusContext *context)
880 _dbus_assert (context->refcount > 0);
881 context->refcount += 1;
887 bus_context_unref (BusContext *context)
889 _dbus_assert (context->refcount > 0);
890 context->refcount -= 1;
892 if (context->refcount == 0)
896 _dbus_verbose ("Finalizing bus context %p\n", context);
898 bus_context_shutdown (context);
900 if (context->connections)
902 bus_connections_unref (context->connections);
903 context->connections = NULL;
906 if (context->registry)
908 bus_registry_unref (context->registry);
909 context->registry = NULL;
912 if (context->activation)
914 bus_activation_unref (context->activation);
915 context->activation = NULL;
918 link = _dbus_list_get_first_link (&context->servers);
921 dbus_server_unref (link->data);
923 link = _dbus_list_get_next_link (&context->servers, link);
925 _dbus_list_clear (&context->servers);
929 bus_policy_unref (context->policy);
930 context->policy = NULL;
935 _dbus_loop_unref (context->loop);
936 context->loop = NULL;
939 if (context->matchmaker)
941 bus_matchmaker_unref (context->matchmaker);
942 context->matchmaker = NULL;
945 dbus_free (context->config_file);
946 dbus_free (context->type);
947 dbus_free (context->address);
948 dbus_free (context->user);
949 dbus_free (context->servicehelper);
951 if (context->pidfile)
954 _dbus_string_init_const (&u, context->pidfile);
956 /* Deliberately ignore errors here, since there's not much
957 * we can do about it, and we're exiting anyways.
959 _dbus_delete_file (&u, NULL);
961 dbus_free (context->pidfile);
965 dbus_server_free_data_slot (&server_data_slot);
969 /* type may be NULL */
971 bus_context_get_type (BusContext *context)
973 return context->type;
977 bus_context_get_address (BusContext *context)
979 return context->address;
983 bus_context_get_servicehelper (BusContext *context)
985 return context->servicehelper;
989 bus_context_get_registry (BusContext *context)
991 return context->registry;
995 bus_context_get_connections (BusContext *context)
997 return context->connections;
1001 bus_context_get_activation (BusContext *context)
1003 return context->activation;
1007 bus_context_get_matchmaker (BusContext *context)
1009 return context->matchmaker;
1013 bus_context_get_loop (BusContext *context)
1015 return context->loop;
1019 bus_context_allow_unix_user (BusContext *context,
1022 return bus_policy_allow_unix_user (context->policy,
1026 /* For now this is never actually called because the default
1027 * DBusConnection behavior of 'same user that owns the bus can connect'
1028 * is all it would do.
1031 bus_context_allow_windows_user (BusContext *context,
1032 const char *windows_sid)
1034 return bus_policy_allow_windows_user (context->policy,
1039 bus_context_get_policy (BusContext *context)
1041 return context->policy;
1045 bus_context_create_client_policy (BusContext *context,
1046 DBusConnection *connection,
1049 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1050 return bus_policy_create_client_policy (context->policy, connection,
1055 bus_context_get_activation_timeout (BusContext *context)
1058 return context->limits.activation_timeout;
1062 bus_context_get_auth_timeout (BusContext *context)
1064 return context->limits.auth_timeout;
1068 bus_context_get_max_completed_connections (BusContext *context)
1070 return context->limits.max_completed_connections;
1074 bus_context_get_max_incomplete_connections (BusContext *context)
1076 return context->limits.max_incomplete_connections;
1080 bus_context_get_max_connections_per_user (BusContext *context)
1082 return context->limits.max_connections_per_user;
1086 bus_context_get_max_pending_activations (BusContext *context)
1088 return context->limits.max_pending_activations;
1092 bus_context_get_max_services_per_connection (BusContext *context)
1094 return context->limits.max_services_per_connection;
1098 bus_context_get_max_match_rules_per_connection (BusContext *context)
1100 return context->limits.max_match_rules_per_connection;
1104 bus_context_get_max_replies_per_connection (BusContext *context)
1106 return context->limits.max_replies_per_connection;
1110 bus_context_get_reply_timeout (BusContext *context)
1112 return context->limits.reply_timeout;
1116 bus_context_log_info (BusContext *context, const char *msg, ...)
1120 va_start (args, msg);
1122 if (context->syslog)
1123 _dbus_log_info (msg, args);
1129 bus_context_log_security (BusContext *context, const char *msg, ...)
1133 va_start (args, msg);
1135 if (context->syslog)
1136 _dbus_log_security (msg, args);
1142 * addressed_recipient is the recipient specified in the message.
1144 * proposed_recipient is the recipient we're considering sending
1145 * to right this second, and may be an eavesdropper.
1147 * sender is the sender of the message.
1149 * NULL for proposed_recipient or sender definitely means the bus driver.
1151 * NULL for addressed_recipient may mean the bus driver, or may mean
1152 * no destination was specified in the message (e.g. a signal).
1155 bus_context_check_security_policy (BusContext *context,
1156 BusTransaction *transaction,
1157 DBusConnection *sender,
1158 DBusConnection *addressed_recipient,
1159 DBusConnection *proposed_recipient,
1160 DBusMessage *message,
1164 BusClientPolicy *sender_policy;
1165 BusClientPolicy *recipient_policy;
1166 dbus_int32_t toggles;
1169 dbus_bool_t requested_reply;
1170 const char *sender_name;
1171 const char *sender_loginfo;
1172 const char *proposed_recipient_loginfo;
1174 type = dbus_message_get_type (message);
1175 dest = dbus_message_get_destination (message);
1177 /* dispatch.c was supposed to ensure these invariants */
1178 _dbus_assert (dest != NULL ||
1179 type == DBUS_MESSAGE_TYPE_SIGNAL ||
1180 (sender == NULL && !bus_connection_is_active (proposed_recipient)));
1181 _dbus_assert (type == DBUS_MESSAGE_TYPE_SIGNAL ||
1182 addressed_recipient != NULL ||
1183 strcmp (dest, DBUS_SERVICE_DBUS) == 0);
1185 /* Used in logging below */
1188 sender_name = bus_connection_get_name (sender);
1189 sender_loginfo = bus_connection_get_loginfo (sender);
1194 sender_loginfo = "(bus)";
1197 if (proposed_recipient != NULL)
1198 proposed_recipient_loginfo = bus_connection_get_loginfo (proposed_recipient);
1200 proposed_recipient_loginfo = "bus";
1204 case DBUS_MESSAGE_TYPE_METHOD_CALL:
1205 case DBUS_MESSAGE_TYPE_SIGNAL:
1206 case DBUS_MESSAGE_TYPE_METHOD_RETURN:
1207 case DBUS_MESSAGE_TYPE_ERROR:
1211 _dbus_verbose ("security check disallowing message of unknown type %d\n",
1214 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1215 "Message bus will not accept messages of unknown type\n");
1220 requested_reply = FALSE;
1224 /* First verify the SELinux access controls. If allowed then
1225 * go on with the standard checks.
1227 if (!bus_selinux_allows_send (sender, proposed_recipient,
1228 dbus_message_type_to_string (dbus_message_get_type (message)),
1229 dbus_message_get_interface (message),
1230 dbus_message_get_member (message),
1231 dbus_message_get_error_name (message),
1232 dest ? dest : DBUS_SERVICE_DBUS, error))
1234 if (error != NULL && !dbus_error_is_set (error))
1236 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1237 "An SELinux policy prevents this sender "
1238 "from sending this message to this recipient "
1239 "(rejected message had sender \"%s\" interface \"%s\" "
1240 "member \"%s\" error name \"%s\" destination \"%s\")",
1241 sender_name ? sender_name : "(unset)",
1242 dbus_message_get_interface (message) ?
1243 dbus_message_get_interface (message) : "(unset)",
1244 dbus_message_get_member (message) ?
1245 dbus_message_get_member (message) : "(unset)",
1246 dbus_message_get_error_name (message) ?
1247 dbus_message_get_error_name (message) : "(unset)",
1248 dest ? dest : DBUS_SERVICE_DBUS);
1249 _dbus_verbose ("SELinux security check denying send to service\n");
1255 if (bus_connection_is_active (sender))
1257 sender_policy = bus_connection_get_policy (sender);
1258 _dbus_assert (sender_policy != NULL);
1260 /* Fill in requested_reply variable with TRUE if this is a
1261 * reply and the reply was pending.
1263 if (dbus_message_get_reply_serial (message) != 0)
1265 if (proposed_recipient != NULL /* not to the bus driver */ &&
1266 addressed_recipient == proposed_recipient /* not eavesdropping */)
1270 dbus_error_init (&error2);
1271 requested_reply = bus_connections_check_reply (bus_connection_get_connections (sender),
1273 sender, addressed_recipient, message,
1275 if (dbus_error_is_set (&error2))
1277 dbus_move_error (&error2, error);
1285 /* Policy for inactive connections is that they can only send
1286 * the hello message to the bus driver
1288 if (proposed_recipient == NULL &&
1289 dbus_message_is_method_call (message,
1290 DBUS_INTERFACE_DBUS,
1293 _dbus_verbose ("security check allowing %s message\n",
1299 _dbus_verbose ("security check disallowing non-%s message\n",
1302 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1303 "Client tried to send a message other than %s without being registered",
1312 sender_policy = NULL;
1314 /* If the sender is the bus driver, we assume any reply was a
1315 * requested reply as bus driver won't send bogus ones
1317 if (addressed_recipient == proposed_recipient /* not eavesdropping */ &&
1318 dbus_message_get_reply_serial (message) != 0)
1319 requested_reply = TRUE;
1322 _dbus_assert ((sender != NULL && sender_policy != NULL) ||
1323 (sender == NULL && sender_policy == NULL));
1325 if (proposed_recipient != NULL)
1327 /* only the bus driver can send to an inactive recipient (as it
1328 * owns no services, so other apps can't address it). Inactive
1329 * recipients can receive any message.
1331 if (bus_connection_is_active (proposed_recipient))
1333 recipient_policy = bus_connection_get_policy (proposed_recipient);
1334 _dbus_assert (recipient_policy != NULL);
1336 else if (sender == NULL)
1338 _dbus_verbose ("security check using NULL recipient policy for message from bus\n");
1339 recipient_policy = NULL;
1343 _dbus_assert_not_reached ("a message was somehow sent to an inactive recipient from a source other than the message bus\n");
1344 recipient_policy = NULL;
1348 recipient_policy = NULL;
1350 _dbus_assert ((proposed_recipient != NULL && recipient_policy != NULL) ||
1351 (proposed_recipient != NULL && sender == NULL && recipient_policy == NULL) ||
1352 (proposed_recipient == NULL && recipient_policy == NULL));
1355 if (sender_policy &&
1356 !bus_client_policy_check_can_send (sender_policy,
1360 message, &toggles, &log))
1362 const char *msg = "Rejected send message, %d matched rules; "
1363 "type=\"%s\", sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" destination=\"%s\" (%s))";
1365 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, msg,
1367 dbus_message_type_to_string (dbus_message_get_type (message)),
1368 sender_name ? sender_name : "(unset)",
1370 dbus_message_get_interface (message) ?
1371 dbus_message_get_interface (message) : "(unset)",
1372 dbus_message_get_member (message) ?
1373 dbus_message_get_member (message) : "(unset)",
1374 dbus_message_get_error_name (message) ?
1375 dbus_message_get_error_name (message) : "(unset)",
1376 dest ? dest : DBUS_SERVICE_DBUS,
1377 proposed_recipient_loginfo);
1378 /* Needs to be duplicated to avoid calling malloc and having to handle OOM */
1379 bus_context_log_security (context, msg,
1381 dbus_message_type_to_string (dbus_message_get_type (message)),
1382 sender_name ? sender_name : "(unset)",
1384 dbus_message_get_interface (message) ?
1385 dbus_message_get_interface (message) : "(unset)",
1386 dbus_message_get_member (message) ?
1387 dbus_message_get_member (message) : "(unset)",
1388 dbus_message_get_error_name (message) ?
1389 dbus_message_get_error_name (message) : "(unset)",
1390 dest ? dest : DBUS_SERVICE_DBUS,
1391 proposed_recipient_loginfo);
1392 _dbus_verbose ("security policy disallowing message due to sender policy\n");
1397 bus_context_log_security (context,
1398 "Would reject message, %d matched rules; "
1399 "type=\"%s\", sender=\"%s\" interface=\"%s\" member=\"%s\" error name=\"%s\" destination=\"%s\")",
1401 dbus_message_type_to_string (dbus_message_get_type (message)),
1402 sender_name ? sender_name : "(unset)",
1403 dbus_message_get_interface (message) ?
1404 dbus_message_get_interface (message) : "(unset)",
1405 dbus_message_get_member (message) ?
1406 dbus_message_get_member (message) : "(unset)",
1407 dbus_message_get_error_name (message) ?
1408 dbus_message_get_error_name (message) : "(unset)",
1409 dest ? dest : DBUS_SERVICE_DBUS);
1411 if (recipient_policy &&
1412 !bus_client_policy_check_can_receive (recipient_policy,
1416 addressed_recipient, proposed_recipient,
1419 const char *msg = "Rejected receive message, %d matched rules; "
1420 "type=\"%s\" sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" reply serial=%u requested_reply=%d destination=\"%s\" (%s))";
1422 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, msg,
1424 dbus_message_type_to_string (dbus_message_get_type (message)),
1425 sender_name ? sender_name : "(unset)",
1427 dbus_message_get_interface (message) ?
1428 dbus_message_get_interface (message) : "(unset)",
1429 dbus_message_get_member (message) ?
1430 dbus_message_get_member (message) : "(unset)",
1431 dbus_message_get_error_name (message) ?
1432 dbus_message_get_error_name (message) : "(unset)",
1433 dbus_message_get_reply_serial (message),
1435 dest ? dest : DBUS_SERVICE_DBUS,
1436 proposed_recipient_loginfo);
1437 /* Needs to be duplicated to avoid calling malloc and having to handle OOM */
1438 bus_context_log_security (context, msg,
1440 dbus_message_type_to_string (dbus_message_get_type (message)),
1441 sender_name ? sender_name : "(unset)",
1443 dbus_message_get_interface (message) ?
1444 dbus_message_get_interface (message) : "(unset)",
1445 dbus_message_get_member (message) ?
1446 dbus_message_get_member (message) : "(unset)",
1447 dbus_message_get_error_name (message) ?
1448 dbus_message_get_error_name (message) : "(unset)",
1449 dbus_message_get_reply_serial (message),
1451 dest ? dest : DBUS_SERVICE_DBUS,
1452 proposed_recipient_loginfo);
1453 _dbus_verbose ("security policy disallowing message due to recipient policy\n");
1457 /* See if limits on size have been exceeded */
1458 if (proposed_recipient &&
1459 dbus_connection_get_outgoing_size (proposed_recipient) >
1460 context->limits.max_outgoing_bytes)
1462 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1463 "The destination service \"%s\" has a full message queue",
1464 dest ? dest : (proposed_recipient ?
1465 bus_connection_get_name (proposed_recipient) :
1466 DBUS_SERVICE_DBUS));
1467 _dbus_verbose ("security policy disallowing message due to full message queue\n");
1471 /* Record that we will allow a reply here in the future (don't
1472 * bother if the recipient is the bus or this is an eavesdropping
1473 * connection). Only the addressed recipient may reply.
1475 if (type == DBUS_MESSAGE_TYPE_METHOD_CALL &&
1477 addressed_recipient &&
1478 addressed_recipient == proposed_recipient && /* not eavesdropping */
1479 !bus_connections_expect_reply (bus_connection_get_connections (sender),
1481 sender, addressed_recipient,
1484 _dbus_verbose ("Failed to record reply expectation or problem with the message expecting a reply\n");
1488 _dbus_verbose ("security policy allowing message\n");