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<hr><h1>bus.c</h1><div class="fragment"><pre>00001 <font class="comment">/* -*- mode: C; c-file-style: "gnu" -*- */</font>
00002 <font class="comment">/* bus.c message bus context object</font>
00003 <font class="comment"> *</font>
00004 <font class="comment"> * Copyright (C) 2003 Red Hat, Inc.</font>
00005 <font class="comment"> *</font>
00006 <font class="comment"> * Licensed under the Academic Free License version 1.2</font>
00007 <font class="comment"> * </font>
00008 <font class="comment"> * This program is free software; you can redistribute it and/or modify</font>
00009 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00010 <font class="comment"> * the Free Software Foundation; either version 2 of the License, or</font>
00011 <font class="comment"> * (at your option) any later version.</font>
00012 <font class="comment"> *</font>
00013 <font class="comment"> * This program is distributed in the hope that it will be useful,</font>
00014 <font class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00015 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</font>
00016 <font class="comment"> * GNU General Public License for more details.</font>
00017 <font class="comment"> * </font>
00018 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00019 <font class="comment"> * along with this program; if not, write to the Free Software</font>
00020 <font class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</font>
00021 <font class="comment"> *</font>
00022 <font class="comment"> */</font>
00023
00024 <font class="preprocessor">#include "bus.h"</font>
00025 <font class="preprocessor">#include "activation.h"</font>
00026 <font class="preprocessor">#include "connection.h"</font>
00027 <font class="preprocessor">#include "services.h"</font>
00028 <font class="preprocessor">#include "utils.h"</font>
00029 <font class="preprocessor">#include "policy.h"</font>
00030 <font class="preprocessor">#include "config-parser.h"</font>
00031 <font class="preprocessor">#include "signals.h"</font>
00032 <font class="preprocessor">#include <dbus/dbus-list.h></font>
00033 <font class="preprocessor">#include <dbus/dbus-hash.h></font>
00034 <font class="preprocessor">#include <dbus/dbus-internals.h></font>
00035
00036 <font class="keyword">struct </font>BusContext
00037 {
00038 <font class="keywordtype">int</font> refcount;
00039 <font class="keywordtype">char</font> *type;
00040 <font class="keywordtype">char</font> *address;
00041 <font class="keywordtype">char</font> *pidfile;
00042 DBusLoop *loop;
00043 <a class="code" href="structDBusList.html">DBusList</a> *servers;
00044 BusConnections *connections;
00045 BusActivation *activation;
00046 BusRegistry *registry;
00047 BusPolicy *policy;
00048 BusMatchmaker *matchmaker;
00049 <a class="code" href="structDBusUserDatabase.html">DBusUserDatabase</a> *user_database;
00050 BusLimits limits;
00051 };
00052
00053 <font class="keyword">static</font> dbus_int32_t server_data_slot = -1;
00054
00055 <font class="keyword">typedef</font> <font class="keyword">struct</font>
00056 <font class="keyword"></font>{
00057 BusContext *context;
00058 } BusServerData;
00059
00060 <font class="preprocessor">#define BUS_SERVER_DATA(server) (dbus_server_get_data ((server), server_data_slot))</font>
00061 <font class="preprocessor"></font>
00062 <font class="keyword">static</font> BusContext*
00063 server_get_context (<a class="code" href="structDBusServer.html">DBusServer</a> *server)
00064 {
00065 BusContext *context;
00066 BusServerData *bd;
00067
00068 <font class="keywordflow">if</font> (!dbus_server_allocate_data_slot (&server_data_slot))
00069 <font class="keywordflow">return</font> NULL;
00070
00071 bd = BUS_SERVER_DATA (server);
00072 <font class="keywordflow">if</font> (bd == NULL)
00073 {
00074 dbus_server_free_data_slot (&server_data_slot);
00075 <font class="keywordflow">return</font> NULL;
00076 }
00077
00078 context = bd->context;
00079
00080 dbus_server_free_data_slot (&server_data_slot);
00081
00082 <font class="keywordflow">return</font> context;
00083 }
00084
00085 <font class="keyword">static</font> dbus_bool_t
00086 server_watch_callback (<a class="code" href="structDBusWatch.html">DBusWatch</a> *watch,
00087 <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> condition,
00088 <font class="keywordtype">void</font> *data)
00089 {
00090 <font class="comment">/* FIXME this can be done in dbus-mainloop.c</font>
00091 <font class="comment"> * if the code in activation.c for the babysitter</font>
00092 <font class="comment"> * watch handler is fixed.</font>
00093 <font class="comment"> */</font>
00094
00095 <font class="keywordflow">return</font> dbus_watch_handle (watch, condition);
00096 }
00097
00098 <font class="keyword">static</font> dbus_bool_t
00099 add_server_watch (<a class="code" href="structDBusWatch.html">DBusWatch</a> *watch,
00100 <font class="keywordtype">void</font> *data)
00101 {
00102 <a class="code" href="structDBusServer.html">DBusServer</a> *server = data;
00103 BusContext *context;
00104
00105 context = server_get_context (server);
00106
00107 <font class="keywordflow">return</font> _dbus_loop_add_watch (context->loop,
00108 watch, server_watch_callback, server,
00109 NULL);
00110 }
00111
00112 <font class="keyword">static</font> <font class="keywordtype">void</font>
00113 remove_server_watch (<a class="code" href="structDBusWatch.html">DBusWatch</a> *watch,
00114 <font class="keywordtype">void</font> *data)
00115 {
00116 <a class="code" href="structDBusServer.html">DBusServer</a> *server = data;
00117 BusContext *context;
00118
00119 context = server_get_context (server);
00120
00121 _dbus_loop_remove_watch (context->loop,
00122 watch, server_watch_callback, server);
00123 }
00124
00125
00126 <font class="keyword">static</font> <font class="keywordtype">void</font>
00127 server_timeout_callback (<a class="code" href="structDBusTimeout.html">DBusTimeout</a> *timeout,
00128 <font class="keywordtype">void</font> *data)
00129 {
00130 <font class="comment">/* can return FALSE on OOM but we just let it fire again later */</font>
00131 dbus_timeout_handle (timeout);
00132 }
00133
00134 <font class="keyword">static</font> dbus_bool_t
00135 add_server_timeout (<a class="code" href="structDBusTimeout.html">DBusTimeout</a> *timeout,
00136 <font class="keywordtype">void</font> *data)
00137 {
00138 <a class="code" href="structDBusServer.html">DBusServer</a> *server = data;
00139 BusContext *context;
00140
00141 context = server_get_context (server);
00142
00143 <font class="keywordflow">return</font> _dbus_loop_add_timeout (context->loop,
00144 timeout, server_timeout_callback, server, NULL);
00145 }
00146
00147 <font class="keyword">static</font> <font class="keywordtype">void</font>
00148 remove_server_timeout (<a class="code" href="structDBusTimeout.html">DBusTimeout</a> *timeout,
00149 <font class="keywordtype">void</font> *data)
00150 {
00151 <a class="code" href="structDBusServer.html">DBusServer</a> *server = data;
00152 BusContext *context;
00153
00154 context = server_get_context (server);
00155
00156 _dbus_loop_remove_timeout (context->loop,
00157 timeout, server_timeout_callback, server);
00158 }
00159
00160 <font class="keyword">static</font> <font class="keywordtype">void</font>
00161 new_connection_callback (<a class="code" href="structDBusServer.html">DBusServer</a> *server,
00162 <a class="code" href="structDBusConnection.html">DBusConnection</a> *new_connection,
00163 <font class="keywordtype">void</font> *data)
00164 {
00165 BusContext *context = data;
00166
00167 <font class="keywordflow">if</font> (!bus_connections_setup_connection (context->connections, new_connection))
00168 {
00169 _dbus_verbose (<font class="stringliteral">"No memory to setup new connection\n"</font>);
00170
00171 <font class="comment">/* if we don't do this, it will get unref'd without</font>
00172 <font class="comment"> * being disconnected... kind of strange really</font>
00173 <font class="comment"> * that we have to do this, people won't get it right</font>
00174 <font class="comment"> * in general.</font>
00175 <font class="comment"> */</font>
00176 dbus_connection_disconnect (new_connection);
00177 }
00178
00179 dbus_connection_set_max_received_size (new_connection,
00180 context->limits.max_incoming_bytes);
00181
00182 dbus_connection_set_max_message_size (new_connection,
00183 context->limits.max_message_size);
00184
00185 <font class="comment">/* on OOM, we won't have ref'd the connection so it will die. */</font>
00186 }
00187
00188 <font class="keyword">static</font> <font class="keywordtype">void</font>
00189 free_server_data (<font class="keywordtype">void</font> *data)
00190 {
00191 BusServerData *bd = data;
00192
00193 dbus_free (bd);
00194 }
00195
00196 <font class="keyword">static</font> dbus_bool_t
00197 setup_server (BusContext *context,
00198 <a class="code" href="structDBusServer.html">DBusServer</a> *server,
00199 <font class="keywordtype">char</font> **auth_mechanisms,
00200 <a class="code" href="structDBusError.html">DBusError</a> *error)
00201 {
00202 BusServerData *bd;
00203
00204 bd = dbus_new0 (BusServerData, 1);
00205 <font class="keywordflow">if</font> (!dbus_server_set_data (server,
00206 server_data_slot,
00207 bd, free_server_data))
00208 {
00209 dbus_free (bd);
00210 BUS_SET_OOM (error);
00211 <font class="keywordflow">return</font> FALSE;
00212 }
00213
00214 bd->context = context;
00215
00216 <font class="keywordflow">if</font> (!dbus_server_set_auth_mechanisms (server, (<font class="keyword">const</font> <font class="keywordtype">char</font>**) auth_mechanisms))
00217 {
00218 BUS_SET_OOM (error);
00219 <font class="keywordflow">return</font> FALSE;
00220 }
00221
00222 dbus_server_set_new_connection_function (server,
00223 new_connection_callback,
00224 context, NULL);
00225
00226 <font class="keywordflow">if</font> (!dbus_server_set_watch_functions (server,
00227 add_server_watch,
00228 remove_server_watch,
00229 NULL,
00230 server,
00231 NULL))
00232 {
00233 BUS_SET_OOM (error);
00234 <font class="keywordflow">return</font> FALSE;
00235 }
00236
00237 <font class="keywordflow">if</font> (!dbus_server_set_timeout_functions (server,
00238 add_server_timeout,
00239 remove_server_timeout,
00240 NULL,
00241 server, NULL))
00242 {
00243 BUS_SET_OOM (error);
00244 <font class="keywordflow">return</font> FALSE;
00245 }
00246
00247 <font class="keywordflow">return</font> TRUE;
00248 }
00249
00250 BusContext*
00251 bus_context_new (<font class="keyword">const</font> <a class="code" href="structDBusString.html">DBusString</a> *config_file,
00252 dbus_bool_t force_fork,
00253 <font class="keywordtype">int</font> print_addr_fd,
00254 <font class="keywordtype">int</font> print_pid_fd,
00255 <a class="code" href="structDBusError.html">DBusError</a> *error)
00256 {
00257 BusContext *context;
00258 <a class="code" href="structDBusList.html">DBusList</a> *link;
00259 <a class="code" href="structDBusList.html">DBusList</a> **addresses;
00260 <a class="code" href="structBusConfigParser.html">BusConfigParser</a> *parser;
00261 <a class="code" href="structDBusString.html">DBusString</a> full_address;
00262 <font class="keyword">const</font> <font class="keywordtype">char</font> *user, *pidfile;
00263 <font class="keywordtype">char</font> **auth_mechanisms;
00264 <a class="code" href="structDBusList.html">DBusList</a> **auth_mechanisms_list;
00265 <font class="keywordtype">int</font> len;
00266
00267 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
00268
00269 <font class="keywordflow">if</font> (!_dbus_string_init (&full_address))
00270 {
00271 BUS_SET_OOM (error);
00272 <font class="keywordflow">return</font> NULL;
00273 }
00274
00275 <font class="keywordflow">if</font> (!dbus_server_allocate_data_slot (&server_data_slot))
00276 {
00277 BUS_SET_OOM (error);
00278 _dbus_string_free (&full_address);
00279 <font class="keywordflow">return</font> NULL;
00280 }
00281
00282 parser = NULL;
00283 context = NULL;
00284 auth_mechanisms = NULL;
00285
00286 parser = bus_config_load (config_file, TRUE, error);
00287 <font class="keywordflow">if</font> (parser == NULL)
00288 <font class="keywordflow">goto</font> failed;
00289
00290 <font class="comment">/* Check for an existing pid file. Of course this is a race;</font>
00291 <font class="comment"> * we'd have to use fcntl() locks on the pid file to</font>
00292 <font class="comment"> * avoid that. But we want to check for the pid file</font>
00293 <font class="comment"> * before overwriting any existing sockets, etc.</font>
00294 <font class="comment"> */</font>
00295 pidfile = bus_config_parser_get_pidfile (parser);
00296 <font class="keywordflow">if</font> (pidfile != NULL)
00297 {
00298 <a class="code" href="structDBusString.html">DBusString</a> u;
00299 <a class="code" href="structDBusStat.html">DBusStat</a> stbuf;
00300 <a class="code" href="structDBusError.html">DBusError</a> tmp_error;
00301
00302 dbus_error_init (&tmp_error);
00303 _dbus_string_init_const (&u, pidfile);
00304
00305 <font class="keywordflow">if</font> (_dbus_stat (&u, &stbuf, &tmp_error))
00306 {
00307 dbus_set_error (error, DBUS_ERROR_FAILED,
00308 <font class="stringliteral">"The pid file \"%s\" exists, if the message bus is not running, remove this file"</font>,
00309 pidfile);
00310 dbus_error_free (&tmp_error);
00311 <font class="keywordflow">goto</font> failed;
00312 }
00313 }
00314
00315 context = dbus_new0 (BusContext, 1);
00316 <font class="keywordflow">if</font> (context == NULL)
00317 {
00318 BUS_SET_OOM (error);
00319 <font class="keywordflow">goto</font> failed;
00320 }
00321
00322 context->refcount = 1;
00323
00324 <font class="comment">/* get our limits and timeout lengths */</font>
00325 bus_config_parser_get_limits (parser, &context->limits);
00326
00327 <font class="comment">/* we need another ref of the server data slot for the context</font>
00328 <font class="comment"> * to own</font>
00329 <font class="comment"> */</font>
00330 <font class="keywordflow">if</font> (!dbus_server_allocate_data_slot (&server_data_slot))
00331 _dbus_assert_not_reached (<font class="stringliteral">"second ref of server data slot failed"</font>);
00332
00333 context->user_database = _dbus_user_database_new ();
00334 <font class="keywordflow">if</font> (context->user_database == NULL)
00335 {
00336 BUS_SET_OOM (error);
00337 <font class="keywordflow">goto</font> failed;
00338 }
00339
00340 context->loop = _dbus_loop_new ();
00341 <font class="keywordflow">if</font> (context->loop == NULL)
00342 {
00343 BUS_SET_OOM (error);
00344 <font class="keywordflow">goto</font> failed;
00345 }
00346
00347 <font class="comment">/* Build an array of auth mechanisms */</font>
00348
00349 auth_mechanisms_list = bus_config_parser_get_mechanisms (parser);
00350 len = _dbus_list_get_length (auth_mechanisms_list);
00351
00352 <font class="keywordflow">if</font> (len > 0)
00353 {
00354 <font class="keywordtype">int</font> i;
00355
00356 auth_mechanisms = dbus_new0 (<font class="keywordtype">char</font>*, len + 1);
00357 <font class="keywordflow">if</font> (auth_mechanisms == NULL)
00358 <font class="keywordflow">goto</font> failed;
00359
00360 i = 0;
00361 link = _dbus_list_get_first_link (auth_mechanisms_list);
00362 <font class="keywordflow">while</font> (link != NULL)
00363 {
00364 auth_mechanisms[i] = _dbus_strdup (link-><a class="code" href="structDBusList.html#m2">data</a>);
00365 <font class="keywordflow">if</font> (auth_mechanisms[i] == NULL)
00366 <font class="keywordflow">goto</font> failed;
00367 link = _dbus_list_get_next_link (auth_mechanisms_list, link);
00368 }
00369 }
00370 <font class="keywordflow">else</font>
00371 {
00372 auth_mechanisms = NULL;
00373 }
00374
00375 <font class="comment">/* Listen on our addresses */</font>
00376
00377 addresses = bus_config_parser_get_addresses (parser);
00378
00379 link = _dbus_list_get_first_link (addresses);
00380 <font class="keywordflow">while</font> (link != NULL)
00381 {
00382 <a class="code" href="structDBusServer.html">DBusServer</a> *server;
00383
00384 server = dbus_server_listen (link-><a class="code" href="structDBusList.html#m2">data</a>, error);
00385 <font class="keywordflow">if</font> (server == NULL)
00386 <font class="keywordflow">goto</font> failed;
00387 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (!setup_server (context, server, auth_mechanisms, error))
00388 <font class="keywordflow">goto</font> failed;
00389
00390 <font class="keywordflow">if</font> (!_dbus_list_append (&context->servers, server))
00391 {
00392 BUS_SET_OOM (error);
00393 <font class="keywordflow">goto</font> failed;
00394 }
00395
00396 link = _dbus_list_get_next_link (addresses, link);
00397 }
00398
00399 <font class="comment">/* note that type may be NULL */</font>
00400 context->type = _dbus_strdup (bus_config_parser_get_type (parser));
00401
00402 <font class="comment">/* We have to build the address backward, so that</font>
00403 <font class="comment"> * <listen> later in the config file have priority</font>
00404 <font class="comment"> */</font>
00405 link = _dbus_list_get_last_link (&context->servers);
00406 <font class="keywordflow">while</font> (link != NULL)
00407 {
00408 <font class="keywordtype">char</font> *addr;
00409
00410 addr = dbus_server_get_address (link-><a class="code" href="structDBusList.html#m2">data</a>);
00411 <font class="keywordflow">if</font> (addr == NULL)
00412 {
00413 BUS_SET_OOM (error);
00414 <font class="keywordflow">goto</font> failed;
00415 }
00416
00417 <font class="keywordflow">if</font> (_dbus_string_get_length (&full_address) > 0)
00418 {
00419 <font class="keywordflow">if</font> (!_dbus_string_append (&full_address, <font class="stringliteral">";"</font>))
00420 {
00421 BUS_SET_OOM (error);
00422 <font class="keywordflow">goto</font> failed;
00423 }
00424 }
00425
00426 <font class="keywordflow">if</font> (!_dbus_string_append (&full_address, addr))
00427 {
00428 BUS_SET_OOM (error);
00429 <font class="keywordflow">goto</font> failed;
00430 }
00431
00432 dbus_free (addr);
00433
00434 link = _dbus_list_get_prev_link (&context->servers, link);
00435 }
00436
00437 <font class="keywordflow">if</font> (!_dbus_string_copy_data (&full_address, &context->address))
00438 {
00439 BUS_SET_OOM (error);
00440 <font class="keywordflow">goto</font> failed;
00441 }
00442
00443 <font class="comment">/* Note that we don't know whether the print_addr_fd is</font>
00444 <font class="comment"> * one of the sockets we're using to listen on, or some</font>
00445 <font class="comment"> * other random thing. But I think the answer is "don't do</font>
00446 <font class="comment"> * that then"</font>
00447 <font class="comment"> */</font>
00448 <font class="keywordflow">if</font> (print_addr_fd >= 0)
00449 {
00450 <a class="code" href="structDBusString.html">DBusString</a> addr;
00451 <font class="keyword">const</font> <font class="keywordtype">char</font> *a = bus_context_get_address (context);
00452 <font class="keywordtype">int</font> bytes;
00453
00454 _dbus_assert (a != NULL);
00455 <font class="keywordflow">if</font> (!_dbus_string_init (&addr))
00456 {
00457 BUS_SET_OOM (error);
00458 <font class="keywordflow">goto</font> failed;
00459 }
00460
00461 <font class="keywordflow">if</font> (!_dbus_string_append (&addr, a) ||
00462 !_dbus_string_append (&addr, <font class="stringliteral">"\n"</font>))
00463 {
00464 _dbus_string_free (&addr);
00465 BUS_SET_OOM (error);
00466 <font class="keywordflow">goto</font> failed;
00467 }
00468
00469 bytes = _dbus_string_get_length (&addr);
00470 <font class="keywordflow">if</font> (_dbus_write (print_addr_fd, &addr, 0, bytes) != bytes)
00471 {
00472 dbus_set_error (error, DBUS_ERROR_FAILED,
00473 <font class="stringliteral">"Printing message bus address: %s\n"</font>,
00474 _dbus_strerror (errno));
00475 _dbus_string_free (&addr);
00476 <font class="keywordflow">goto</font> failed;
00477 }
00478
00479 <font class="keywordflow">if</font> (print_addr_fd > 2)
00480 _dbus_close (print_addr_fd, NULL);
00481
00482 _dbus_string_free (&addr);
00483 }
00484
00485 <font class="comment">/* Create activation subsystem */</font>
00486
00487 context->activation = bus_activation_new (context, &full_address,
00488 bus_config_parser_get_service_dirs (parser),
00489 error);
00490 <font class="keywordflow">if</font> (context->activation == NULL)
00491 {
00492 _DBUS_ASSERT_ERROR_IS_SET (error);
00493 <font class="keywordflow">goto</font> failed;
00494 }
00495
00496 context->connections = bus_connections_new (context);
00497 <font class="keywordflow">if</font> (context->connections == NULL)
00498 {
00499 BUS_SET_OOM (error);
00500 <font class="keywordflow">goto</font> failed;
00501 }
00502
00503 context->registry = bus_registry_new (context);
00504 <font class="keywordflow">if</font> (context->registry == NULL)
00505 {
00506 BUS_SET_OOM (error);
00507 <font class="keywordflow">goto</font> failed;
00508 }
00509
00510 context->matchmaker = bus_matchmaker_new ();
00511 <font class="keywordflow">if</font> (context->matchmaker == NULL)
00512 {
00513 BUS_SET_OOM (error);
00514 <font class="keywordflow">goto</font> failed;
00515 }
00516
00517 context->policy = bus_config_parser_steal_policy (parser);
00518 _dbus_assert (context->policy != NULL);
00519
00520 <font class="comment">/* Now become a daemon if appropriate */</font>
00521 <font class="keywordflow">if</font> (force_fork || bus_config_parser_get_fork (parser))
00522 {
00523 <a class="code" href="structDBusString.html">DBusString</a> u;
00524
00525 <font class="keywordflow">if</font> (pidfile)
00526 _dbus_string_init_const (&u, pidfile);
00527
00528 <font class="keywordflow">if</font> (!_dbus_become_daemon (pidfile ? &u : NULL, error))
00529 <font class="keywordflow">goto</font> failed;
00530 }
00531 <font class="keywordflow">else</font>
00532 {
00533 <font class="comment">/* Need to write PID file for ourselves, not for the child process */</font>
00534 <font class="keywordflow">if</font> (pidfile != NULL)
00535 {
00536 <a class="code" href="structDBusString.html">DBusString</a> u;
00537
00538 _dbus_string_init_const (&u, pidfile);
00539
00540 <font class="keywordflow">if</font> (!_dbus_write_pid_file (&u, _dbus_getpid (), error))
00541 <font class="keywordflow">goto</font> failed;
00542 }
00543 }
00544
00545 <font class="comment">/* keep around the pid filename so we can delete it later */</font>
00546 context->pidfile = _dbus_strdup (pidfile);
00547
00548 <font class="comment">/* Write PID if requested */</font>
00549 <font class="keywordflow">if</font> (print_pid_fd >= 0)
00550 {
00551 <a class="code" href="structDBusString.html">DBusString</a> pid;
00552 <font class="keywordtype">int</font> bytes;
00553
00554 <font class="keywordflow">if</font> (!_dbus_string_init (&pid))
00555 {
00556 BUS_SET_OOM (error);
00557 <font class="keywordflow">goto</font> failed;
00558 }
00559
00560 <font class="keywordflow">if</font> (!_dbus_string_append_int (&pid, _dbus_getpid ()) ||
00561 !_dbus_string_append (&pid, <font class="stringliteral">"\n"</font>))
00562 {
00563 _dbus_string_free (&pid);
00564 BUS_SET_OOM (error);
00565 <font class="keywordflow">goto</font> failed;
00566 }
00567
00568 bytes = _dbus_string_get_length (&pid);
00569 <font class="keywordflow">if</font> (_dbus_write (print_pid_fd, &pid, 0, bytes) != bytes)
00570 {
00571 dbus_set_error (error, DBUS_ERROR_FAILED,
00572 <font class="stringliteral">"Printing message bus PID: %s\n"</font>,
00573 _dbus_strerror (errno));
00574 _dbus_string_free (&pid);
00575 <font class="keywordflow">goto</font> failed;
00576 }
00577
00578 <font class="keywordflow">if</font> (print_pid_fd > 2)
00579 _dbus_close (print_pid_fd, NULL);
00580
00581 _dbus_string_free (&pid);
00582 }
00583
00584 <font class="comment">/* Here we change our credentials if required,</font>
00585 <font class="comment"> * as soon as we've set up our sockets and pidfile</font>
00586 <font class="comment"> */</font>
00587 user = bus_config_parser_get_user (parser);
00588 <font class="keywordflow">if</font> (user != NULL)
00589 {
00590 <a class="code" href="structDBusCredentials.html">DBusCredentials</a> creds;
00591 <a class="code" href="structDBusString.html">DBusString</a> u;
00592
00593 _dbus_string_init_const (&u, user);
00594
00595 <font class="keywordflow">if</font> (!_dbus_credentials_from_username (&u, &creds) ||
00596 creds.<a class="code" href="structDBusCredentials.html#m1">uid</a> < 0 ||
00597 creds.<a class="code" href="structDBusCredentials.html#m2">gid</a> < 0)
00598 {
00599 dbus_set_error (error, DBUS_ERROR_FAILED,
00600 <font class="stringliteral">"Could not get UID and GID for username \"%s\""</font>,
00601 user);
00602 <font class="keywordflow">goto</font> failed;
00603 }
00604
00605 <font class="keywordflow">if</font> (!_dbus_change_identity (creds.<a class="code" href="structDBusCredentials.html#m1">uid</a>, creds.<a class="code" href="structDBusCredentials.html#m2">gid</a>, error))
00606 <font class="keywordflow">goto</font> failed;
00607 }
00608
00609 bus_config_parser_unref (parser);
00610 _dbus_string_free (&full_address);
00611 dbus_free_string_array (auth_mechanisms);
00612 dbus_server_free_data_slot (&server_data_slot);
00613
00614 <font class="keywordflow">return</font> context;
00615
00616 failed:
00617 <font class="keywordflow">if</font> (parser != NULL)
00618 bus_config_parser_unref (parser);
00619
00620 <font class="keywordflow">if</font> (context != NULL)
00621 bus_context_unref (context);
00622
00623 _dbus_string_free (&full_address);
00624 dbus_free_string_array (auth_mechanisms);
00625
00626 dbus_server_free_data_slot (&server_data_slot);
00627
00628 <font class="keywordflow">return</font> NULL;
00629 }
00630
00631 <font class="keyword">static</font> <font class="keywordtype">void</font>
00632 shutdown_server (BusContext *context,
00633 <a class="code" href="structDBusServer.html">DBusServer</a> *server)
00634 {
00635 <font class="keywordflow">if</font> (server == NULL ||
00636 !dbus_server_get_is_connected (server))
00637 <font class="keywordflow">return</font>;
00638
00639 <font class="keywordflow">if</font> (!dbus_server_set_watch_functions (server,
00640 NULL, NULL, NULL,
00641 context,
00642 NULL))
00643 _dbus_assert_not_reached (<font class="stringliteral">"setting watch functions to NULL failed"</font>);
00644
00645 <font class="keywordflow">if</font> (!dbus_server_set_timeout_functions (server,
00646 NULL, NULL, NULL,
00647 context,
00648 NULL))
00649 _dbus_assert_not_reached (<font class="stringliteral">"setting timeout functions to NULL failed"</font>);
00650
00651 dbus_server_disconnect (server);
00652 }
00653
00654 <font class="keywordtype">void</font>
00655 bus_context_shutdown (BusContext *context)
00656 {
00657 <a class="code" href="structDBusList.html">DBusList</a> *link;
00658
00659 link = _dbus_list_get_first_link (&context->servers);
00660 <font class="keywordflow">while</font> (link != NULL)
00661 {
00662 shutdown_server (context, link-><a class="code" href="structDBusList.html#m2">data</a>);
00663
00664 link = _dbus_list_get_next_link (&context->servers, link);
00665 }
00666 }
00667
00668 <font class="keywordtype">void</font>
00669 bus_context_ref (BusContext *context)
00670 {
00671 _dbus_assert (context->refcount > 0);
00672 context->refcount += 1;
00673 }
00674
00675 <font class="keywordtype">void</font>
00676 bus_context_unref (BusContext *context)
00677 {
00678 _dbus_assert (context->refcount > 0);
00679 context->refcount -= 1;
00680
00681 <font class="keywordflow">if</font> (context->refcount == 0)
00682 {
00683 <a class="code" href="structDBusList.html">DBusList</a> *link;
00684
00685 _dbus_verbose (<font class="stringliteral">"Finalizing bus context %p\n"</font>, context);
00686
00687 bus_context_shutdown (context);
00688
00689 <font class="keywordflow">if</font> (context->connections)
00690 {
00691 bus_connections_unref (context->connections);
00692 context->connections = NULL;
00693 }
00694
00695 <font class="keywordflow">if</font> (context->registry)
00696 {
00697 bus_registry_unref (context->registry);
00698 context->registry = NULL;
00699 }
00700
00701 <font class="keywordflow">if</font> (context->activation)
00702 {
00703 bus_activation_unref (context->activation);
00704 context->activation = NULL;
00705 }
00706
00707 link = _dbus_list_get_first_link (&context->servers);
00708 <font class="keywordflow">while</font> (link != NULL)
00709 {
00710 dbus_server_unref (link-><a class="code" href="structDBusList.html#m2">data</a>);
00711
00712 link = _dbus_list_get_next_link (&context->servers, link);
00713 }
00714 _dbus_list_clear (&context->servers);
00715
00716 <font class="keywordflow">if</font> (context->policy)
00717 {
00718 bus_policy_unref (context->policy);
00719 context->policy = NULL;
00720 }
00721
00722 <font class="keywordflow">if</font> (context->loop)
00723 {
00724 _dbus_loop_unref (context->loop);
00725 context->loop = NULL;
00726 }
00727
00728 <font class="keywordflow">if</font> (context->matchmaker)
00729 {
00730 bus_matchmaker_unref (context->matchmaker);
00731 context->matchmaker = NULL;
00732 }
00733
00734 dbus_free (context->type);
00735 dbus_free (context->address);
00736
00737 <font class="keywordflow">if</font> (context->pidfile)
00738 {
00739 <a class="code" href="structDBusString.html">DBusString</a> u;
00740 _dbus_string_init_const (&u, context->pidfile);
00741
00742 <font class="comment">/* Deliberately ignore errors here, since there's not much</font>
00743 <font class="comment"> * we can do about it, and we're exiting anyways.</font>
00744 <font class="comment"> */</font>
00745 _dbus_delete_file (&u, NULL);
00746
00747 dbus_free (context->pidfile);
00748 }
00749
00750 _dbus_user_database_unref (context->user_database);
00751
00752 dbus_free (context);
00753
00754 dbus_server_free_data_slot (&server_data_slot);
00755 }
00756 }
00757
00758 <font class="comment">/* type may be NULL */</font>
00759 <font class="keyword">const</font> <font class="keywordtype">char</font>*
00760 bus_context_get_type (BusContext *context)
00761 {
00762 <font class="keywordflow">return</font> context->type;
00763 }
00764
00765 <font class="keyword">const</font> <font class="keywordtype">char</font>*
00766 bus_context_get_address (BusContext *context)
00767 {
00768 <font class="keywordflow">return</font> context->address;
00769 }
00770
00771 BusRegistry*
00772 bus_context_get_registry (BusContext *context)
00773 {
00774 <font class="keywordflow">return</font> context->registry;
00775 }
00776
00777 BusConnections*
00778 bus_context_get_connections (BusContext *context)
00779 {
00780 <font class="keywordflow">return</font> context->connections;
00781 }
00782
00783 BusActivation*
00784 bus_context_get_activation (BusContext *context)
00785 {
00786 <font class="keywordflow">return</font> context->activation;
00787 }
00788
00789 BusMatchmaker*
00790 bus_context_get_matchmaker (BusContext *context)
00791 {
00792 <font class="keywordflow">return</font> context->matchmaker;
00793 }
00794
00795 DBusLoop*
00796 bus_context_get_loop (BusContext *context)
00797 {
00798 <font class="keywordflow">return</font> context->loop;
00799 }
00800
00801 <a class="code" href="structDBusUserDatabase.html">DBusUserDatabase</a>*
00802 bus_context_get_user_database (BusContext *context)
00803 {
00804 <font class="keywordflow">return</font> context->user_database;
00805 }
00806
00807 dbus_bool_t
00808 bus_context_allow_user (BusContext *context,
00809 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> uid)
00810 {
00811 <font class="keywordflow">return</font> bus_policy_allow_user (context->policy,
00812 context->user_database,
00813 uid);
00814 }
00815
00816 BusClientPolicy*
00817 bus_context_create_client_policy (BusContext *context,
00818 <a class="code" href="structDBusConnection.html">DBusConnection</a> *connection,
00819 <a class="code" href="structDBusError.html">DBusError</a> *error)
00820 {
00821 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
00822 <font class="keywordflow">return</font> bus_policy_create_client_policy (context->policy, connection,
00823 error);
00824 }
00825
00826 <font class="keywordtype">int</font>
00827 bus_context_get_activation_timeout (BusContext *context)
00828 {
00829
00830 <font class="keywordflow">return</font> context->limits.activation_timeout;
00831 }
00832
00833 <font class="keywordtype">int</font>
00834 bus_context_get_auth_timeout (BusContext *context)
00835 {
00836 <font class="keywordflow">return</font> context->limits.auth_timeout;
00837 }
00838
00839 <font class="keywordtype">int</font>
00840 bus_context_get_max_completed_connections (BusContext *context)
00841 {
00842 <font class="keywordflow">return</font> context->limits.max_completed_connections;
00843 }
00844
00845 <font class="keywordtype">int</font>
00846 bus_context_get_max_incomplete_connections (BusContext *context)
00847 {
00848 <font class="keywordflow">return</font> context->limits.max_incomplete_connections;
00849 }
00850
00851 <font class="keywordtype">int</font>
00852 bus_context_get_max_connections_per_user (BusContext *context)
00853 {
00854 <font class="keywordflow">return</font> context->limits.max_connections_per_user;
00855 }
00856
00857 <font class="keywordtype">int</font>
00858 bus_context_get_max_pending_activations (BusContext *context)
00859 {
00860 <font class="keywordflow">return</font> context->limits.max_pending_activations;
00861 }
00862
00863 <font class="keywordtype">int</font>
00864 bus_context_get_max_services_per_connection (BusContext *context)
00865 {
00866 <font class="keywordflow">return</font> context->limits.max_services_per_connection;
00867 }
00868
00869 <font class="keywordtype">int</font>
00870 bus_context_get_max_match_rules_per_connection (BusContext *context)
00871 {
00872 <font class="keywordflow">return</font> context->limits.max_match_rules_per_connection;
00873 }
00874
00875 dbus_bool_t
00876 bus_context_check_security_policy (BusContext *context,
00877 <a class="code" href="structDBusConnection.html">DBusConnection</a> *sender,
00878 <a class="code" href="structDBusConnection.html">DBusConnection</a> *addressed_recipient,
00879 <a class="code" href="structDBusConnection.html">DBusConnection</a> *proposed_recipient,
00880 <a class="code" href="structDBusMessage.html">DBusMessage</a> *message,
00881 <a class="code" href="structDBusError.html">DBusError</a> *error)
00882 {
00883 BusClientPolicy *sender_policy;
00884 BusClientPolicy *recipient_policy;
00885
00886 <font class="comment">/* NULL sender, proposed_recipient means the bus driver. NULL</font>
00887 <font class="comment"> * addressed_recipient means the message didn't specify an explicit</font>
00888 <font class="comment"> * target. If proposed_recipient is NULL, then addressed_recipient</font>
00889 <font class="comment"> * is also NULL but is implicitly the bus driver.</font>
00890 <font class="comment"> */</font>
00891
00892 _dbus_assert (proposed_recipient == NULL ||
00893 (dbus_message_get_destination (message) == NULL ||
00894 addressed_recipient != NULL));
00895
00896 <font class="keywordflow">if</font> (sender != NULL)
00897 {
00898 <font class="keywordflow">if</font> (bus_connection_is_active (sender))
00899 {
00900 sender_policy = bus_connection_get_policy (sender);
00901 _dbus_assert (sender_policy != NULL);
00902 }
00903 <font class="keywordflow">else</font>
00904 {
00905 <font class="comment">/* Policy for inactive connections is that they can only send</font>
00906 <font class="comment"> * the hello message to the bus driver</font>
00907 <font class="comment"> */</font>
00908 <font class="keywordflow">if</font> (proposed_recipient == NULL &&
00909 dbus_message_is_method_call (message,
00910 DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
00911 <font class="stringliteral">"Hello"</font>))
00912 {
00913 _dbus_verbose (<font class="stringliteral">"security check allowing %s message\n"</font>,
00914 <font class="stringliteral">"Hello"</font>);
00915 <font class="keywordflow">return</font> TRUE;
00916 }
00917 <font class="keywordflow">else</font>
00918 {
00919 _dbus_verbose (<font class="stringliteral">"security check disallowing non-%s message\n"</font>,
00920 <font class="stringliteral">"Hello"</font>);
00921
00922 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
00923 <font class="stringliteral">"Client tried to send a message other than %s without being registered"</font>,
00924 <font class="stringliteral">"Hello"</font>);
00925
00926 <font class="keywordflow">return</font> FALSE;
00927 }
00928 }
00929 }
00930 <font class="keywordflow">else</font>
00931 sender_policy = NULL;
00932
00933 _dbus_assert ((sender != NULL && sender_policy != NULL) ||
00934 (sender == NULL && sender_policy == NULL));
00935
00936 <font class="keywordflow">if</font> (proposed_recipient != NULL)
00937 {
00938 <font class="comment">/* only the bus driver can send to an inactive recipient (as it</font>
00939 <font class="comment"> * owns no services, so other apps can't address it). Inactive</font>
00940 <font class="comment"> * recipients can receive any message.</font>
00941 <font class="comment"> */</font>
00942 <font class="keywordflow">if</font> (bus_connection_is_active (proposed_recipient))
00943 {
00944 recipient_policy = bus_connection_get_policy (proposed_recipient);
00945 _dbus_assert (recipient_policy != NULL);
00946 }
00947 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (sender == NULL)
00948 {
00949 _dbus_verbose (<font class="stringliteral">"security check using NULL recipient policy for message from bus\n"</font>);
00950 recipient_policy = NULL;
00951 }
00952 <font class="keywordflow">else</font>
00953 {
00954 _dbus_assert_not_reached (<font class="stringliteral">"a message was somehow sent to an inactive recipient from a source other than the message bus\n"</font>);
00955 recipient_policy = NULL;
00956 }
00957 }
00958 <font class="keywordflow">else</font>
00959 recipient_policy = NULL;
00960
00961 _dbus_assert ((proposed_recipient != NULL && recipient_policy != NULL) ||
00962 (proposed_recipient != NULL && sender == NULL && recipient_policy == NULL) ||
00963 (proposed_recipient == NULL && recipient_policy == NULL));
00964
00965 <font class="keywordflow">if</font> (sender_policy &&
00966 !bus_client_policy_check_can_send (sender_policy,
00967 context->registry, proposed_recipient,
00968 message))
00969 {
00970 <font class="keyword">const</font> <font class="keywordtype">char</font> *dest = dbus_message_get_destination (message);
00971 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
00972 <font class="stringliteral">"A security policy in place prevents this sender "</font>
00973 <font class="stringliteral">"from sending this message to this recipient, "</font>
00974 <font class="stringliteral">"see message bus configuration file (rejected message "</font>
00975 <font class="stringliteral">"had interface \"%s\" member \"%s\" error name \"%s\" destination \"%s\")"</font>,
00976 dbus_message_get_interface (message) ?
00977 dbus_message_get_interface (message) : "(unset)",
00978 dbus_message_get_member (message) ?
00979 dbus_message_get_member (message) : "(unset)",
00980 dbus_message_get_error_name (message) ?
00981 dbus_message_get_error_name (message) : "(unset)",
00982 dest ? dest : DBUS_SERVICE_ORG_FREEDESKTOP_DBUS);
00983 _dbus_verbose (<font class="stringliteral">"security policy disallowing message due to sender policy\n"</font>);
00984 <font class="keywordflow">return</font> FALSE;
00985 }
00986
00987 <font class="keywordflow">if</font> (recipient_policy &&
00988 !bus_client_policy_check_can_receive (recipient_policy,
00989 context->registry, sender,
00990 addressed_recipient, proposed_recipient,
00991 message))
00992 {
00993 <font class="keyword">const</font> <font class="keywordtype">char</font> *dest = dbus_message_get_destination (message);
00994 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
00995 <font class="stringliteral">"A security policy in place prevents this recipient "</font>
00996 <font class="stringliteral">"from receiving this message from this sender, "</font>
00997 <font class="stringliteral">"see message bus configuration file (rejected message "</font>
00998 <font class="stringliteral">"had interface \"%s\" member \"%s\" error name \"%s\" destination \"%s\")"</font>,
00999 dbus_message_get_interface (message) ?
01000 dbus_message_get_interface (message) : "(unset)",
01001 dbus_message_get_member (message) ?
01002 dbus_message_get_member (message) : "(unset)",
01003 dbus_message_get_error_name (message) ?
01004 dbus_message_get_error_name (message) : "(unset)",
01005 dest ? dest : DBUS_SERVICE_ORG_FREEDESKTOP_DBUS);
01006 _dbus_verbose (<font class="stringliteral">"security policy disallowing message due to recipient policy\n"</font>);
01007 <font class="keywordflow">return</font> FALSE;
01008 }
01009
01010 <font class="comment">/* See if limits on size have been exceeded */</font>
01011 <font class="keywordflow">if</font> (proposed_recipient &&
01012 dbus_connection_get_outgoing_size (proposed_recipient) >
01013 context->limits.max_outgoing_bytes)
01014 {
01015 <font class="keyword">const</font> <font class="keywordtype">char</font> *dest = dbus_message_get_destination (message);
01016 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
01017 <font class="stringliteral">"The destination service \"%s\" has a full message queue"</font>,
01018 dest ? dest : (proposed_recipient ?
01019 bus_connection_get_name (proposed_recipient) :
01020 DBUS_SERVICE_ORG_FREEDESKTOP_DBUS));
01021 _dbus_verbose (<font class="stringliteral">"security policy disallowing message due to full message queue\n"</font>);
01022 <font class="keywordflow">return</font> FALSE;
01023 }
01024
01025 _dbus_verbose (<font class="stringliteral">"security policy allowing message\n"</font>);
01026 <font class="keywordflow">return</font> TRUE;
01027 }
</pre></div><hr><address align="right"><small>Generated on Mon Sep 29 21:30:59 2003 for D-BUS by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0
width=110 height=53></a>1.2.15 </small></address>
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distrib
>
Mandriva
>
2007.0
>
x86_64
>
media
>
main-release
>
by-pkgid
>
926d2d1e3111287cee1b0a4fad4fb4f6
>
files
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39
