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<hr><h1>signals.c</h1><div class="fragment"><pre>00001 <font class="comment">/* -*- mode: C; c-file-style: "gnu" -*- */</font>
00002 <font class="comment">/* signals.c Bus signal connection implementation</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 <font class="preprocessor">#include "signals.h"</font>
00024 <font class="preprocessor">#include "services.h"</font>
00025 <font class="preprocessor">#include "utils.h"</font>
00026
00027 <font class="keyword">struct </font>BusMatchRule
00028 {
00029 <font class="keywordtype">int</font> refcount;
00031 <a class="code" href="structDBusConnection.html">DBusConnection</a> *matches_go_to;
00033 <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> flags;
00035 <font class="keywordtype">int</font> message_type;
00036 <font class="keywordtype">char</font> *interface;
00037 <font class="keywordtype">char</font> *member;
00038 <font class="keywordtype">char</font> *sender;
00039 <font class="keywordtype">char</font> *destination;
00040 <font class="keywordtype">char</font> *path;
00041 };
00042
00043 BusMatchRule*
00044 bus_match_rule_new (<a class="code" href="structDBusConnection.html">DBusConnection</a> *matches_go_to)
00045 {
00046 BusMatchRule *rule;
00047
00048 rule = dbus_new0 (BusMatchRule, 1);
00049 <font class="keywordflow">if</font> (rule == NULL)
00050 <font class="keywordflow">return</font> NULL;
00051
00052 rule->refcount = 1;
00053 rule->matches_go_to = matches_go_to;
00054
00055 <font class="keywordflow">return</font> rule;
00056 }
00057
00058 <font class="keywordtype">void</font>
00059 bus_match_rule_ref (BusMatchRule *rule)
00060 {
00061 _dbus_assert (rule->refcount > 0);
00062
00063 rule->refcount += 1;
00064 }
00065
00066 <font class="keywordtype">void</font>
00067 bus_match_rule_unref (BusMatchRule *rule)
00068 {
00069 _dbus_assert (rule->refcount > 0);
00070
00071 rule->refcount -= 1;
00072 <font class="keywordflow">if</font> (rule->refcount == 0)
00073 {
00074 dbus_free (rule->interface);
00075 dbus_free (rule->member);
00076 dbus_free (rule->sender);
00077 dbus_free (rule->destination);
00078 dbus_free (rule->path);
00079 dbus_free (rule);
00080 }
00081 }
00082
00083 <font class="preprocessor">#ifdef DBUS_ENABLE_VERBOSE_MODE</font>
00084 <font class="preprocessor"></font><font class="keyword">static</font> <font class="keywordtype">char</font>*
00085 match_rule_to_string (BusMatchRule *rule)
00086 {
00087 <a class="code" href="structDBusString.html">DBusString</a> str;
00088 <font class="keywordtype">char</font> *ret;
00089
00090 <font class="keywordflow">if</font> (!_dbus_string_init (&str))
00091 {
00092 <font class="keywordtype">char</font> *s;
00093 <font class="keywordflow">while</font> ((s = _dbus_strdup (<font class="stringliteral">"nomem"</font>)) == NULL)
00094 ; <font class="comment">/* only OK for debug spew... */</font>
00095 <font class="keywordflow">return</font> s;
00096 }
00097
00098 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_MESSAGE_TYPE)
00099 {
00100 <font class="comment">/* FIXME make type readable */</font>
00101 <font class="keywordflow">if</font> (!_dbus_string_append_printf (&str, <font class="stringliteral">"type='%d'"</font>, rule->message_type))
00102 <font class="keywordflow">goto</font> nomem;
00103 }
00104
00105 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_INTERFACE)
00106 {
00107 <font class="keywordflow">if</font> (_dbus_string_get_length (&str) > 0)
00108 {
00109 <font class="keywordflow">if</font> (!_dbus_string_append (&str, <font class="stringliteral">","</font>))
00110 <font class="keywordflow">goto</font> nomem;
00111 }
00112
00113 <font class="keywordflow">if</font> (!_dbus_string_append_printf (&str, <font class="stringliteral">"interface='%s'"</font>, rule->interface))
00114 <font class="keywordflow">goto</font> nomem;
00115 }
00116
00117 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_MEMBER)
00118 {
00119 <font class="keywordflow">if</font> (_dbus_string_get_length (&str) > 0)
00120 {
00121 <font class="keywordflow">if</font> (!_dbus_string_append (&str, <font class="stringliteral">","</font>))
00122 <font class="keywordflow">goto</font> nomem;
00123 }
00124
00125 <font class="keywordflow">if</font> (!_dbus_string_append_printf (&str, <font class="stringliteral">"member='%s'"</font>, rule->member))
00126 <font class="keywordflow">goto</font> nomem;
00127 }
00128
00129 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_PATH)
00130 {
00131 <font class="keywordflow">if</font> (_dbus_string_get_length (&str) > 0)
00132 {
00133 <font class="keywordflow">if</font> (!_dbus_string_append (&str, <font class="stringliteral">","</font>))
00134 <font class="keywordflow">goto</font> nomem;
00135 }
00136
00137 <font class="keywordflow">if</font> (!_dbus_string_append_printf (&str, <font class="stringliteral">"path='%s'"</font>, rule->path))
00138 <font class="keywordflow">goto</font> nomem;
00139 }
00140
00141 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_SENDER)
00142 {
00143 <font class="keywordflow">if</font> (_dbus_string_get_length (&str) > 0)
00144 {
00145 <font class="keywordflow">if</font> (!_dbus_string_append (&str, <font class="stringliteral">","</font>))
00146 <font class="keywordflow">goto</font> nomem;
00147 }
00148
00149 <font class="keywordflow">if</font> (!_dbus_string_append_printf (&str, <font class="stringliteral">"sender='%s'"</font>, rule->sender))
00150 <font class="keywordflow">goto</font> nomem;
00151 }
00152
00153 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_DESTINATION)
00154 {
00155 <font class="keywordflow">if</font> (_dbus_string_get_length (&str) > 0)
00156 {
00157 <font class="keywordflow">if</font> (!_dbus_string_append (&str, <font class="stringliteral">","</font>))
00158 <font class="keywordflow">goto</font> nomem;
00159 }
00160
00161 <font class="keywordflow">if</font> (!_dbus_string_append_printf (&str, <font class="stringliteral">"destination='%s'"</font>, rule->destination))
00162 <font class="keywordflow">goto</font> nomem;
00163 }
00164
00165 <font class="keywordflow">if</font> (!_dbus_string_steal_data (&str, &ret))
00166 <font class="keywordflow">goto</font> nomem;
00167
00168 _dbus_string_free (&str);
00169 <font class="keywordflow">return</font> ret;
00170
00171 nomem:
00172 _dbus_string_free (&str);
00173 {
00174 <font class="keywordtype">char</font> *s;
00175 <font class="keywordflow">while</font> ((s = _dbus_strdup (<font class="stringliteral">"nomem"</font>)) == NULL)
00176 ; <font class="comment">/* only OK for debug spew... */</font>
00177 <font class="keywordflow">return</font> s;
00178 }
00179 }
00180 <font class="preprocessor">#endif </font><font class="comment">/* DBUS_ENABLE_VERBOSE_MODE */</font>
00181
00182 dbus_bool_t
00183 bus_match_rule_set_message_type (BusMatchRule *rule,
00184 <font class="keywordtype">int</font> type)
00185 {
00186 rule->flags |= BUS_MATCH_MESSAGE_TYPE;
00187
00188 rule->message_type = type;
00189
00190 <font class="keywordflow">return</font> TRUE;
00191 }
00192
00193 dbus_bool_t
00194 bus_match_rule_set_interface (BusMatchRule *rule,
00195 <font class="keyword">const</font> <font class="keywordtype">char</font> *interface)
00196 {
00197 <font class="keywordtype">char</font> *<font class="keyword">new</font>;
00198
00199 _dbus_assert (interface != NULL);
00200
00201 <font class="keyword">new</font> = _dbus_strdup (interface);
00202 <font class="keywordflow">if</font> (<font class="keyword">new</font> == NULL)
00203 <font class="keywordflow">return</font> FALSE;
00204
00205 rule->flags |= BUS_MATCH_INTERFACE;
00206 dbus_free (rule->interface);
00207 rule->interface = <font class="keyword">new</font>;
00208
00209 <font class="keywordflow">return</font> TRUE;
00210 }
00211
00212 dbus_bool_t
00213 bus_match_rule_set_member (BusMatchRule *rule,
00214 <font class="keyword">const</font> <font class="keywordtype">char</font> *member)
00215 {
00216 <font class="keywordtype">char</font> *<font class="keyword">new</font>;
00217
00218 _dbus_assert (member != NULL);
00219
00220 <font class="keyword">new</font> = _dbus_strdup (member);
00221 <font class="keywordflow">if</font> (<font class="keyword">new</font> == NULL)
00222 <font class="keywordflow">return</font> FALSE;
00223
00224 rule->flags |= BUS_MATCH_MEMBER;
00225 dbus_free (rule->member);
00226 rule->member = <font class="keyword">new</font>;
00227
00228 <font class="keywordflow">return</font> TRUE;
00229 }
00230
00231 dbus_bool_t
00232 bus_match_rule_set_sender (BusMatchRule *rule,
00233 <font class="keyword">const</font> <font class="keywordtype">char</font> *sender)
00234 {
00235 <font class="keywordtype">char</font> *<font class="keyword">new</font>;
00236
00237 _dbus_assert (sender != NULL);
00238
00239 <font class="keyword">new</font> = _dbus_strdup (sender);
00240 <font class="keywordflow">if</font> (<font class="keyword">new</font> == NULL)
00241 <font class="keywordflow">return</font> FALSE;
00242
00243 rule->flags |= BUS_MATCH_SENDER;
00244 dbus_free (rule->sender);
00245 rule->sender = <font class="keyword">new</font>;
00246
00247 <font class="keywordflow">return</font> TRUE;
00248 }
00249
00250 dbus_bool_t
00251 bus_match_rule_set_destination (BusMatchRule *rule,
00252 <font class="keyword">const</font> <font class="keywordtype">char</font> *destination)
00253 {
00254 <font class="keywordtype">char</font> *<font class="keyword">new</font>;
00255
00256 _dbus_assert (destination != NULL);
00257
00258 <font class="keyword">new</font> = _dbus_strdup (destination);
00259 <font class="keywordflow">if</font> (<font class="keyword">new</font> == NULL)
00260 <font class="keywordflow">return</font> FALSE;
00261
00262 rule->flags |= BUS_MATCH_DESTINATION;
00263 dbus_free (rule->destination);
00264 rule->destination = <font class="keyword">new</font>;
00265
00266 <font class="keywordflow">return</font> TRUE;
00267 }
00268
00269 dbus_bool_t
00270 bus_match_rule_set_path (BusMatchRule *rule,
00271 <font class="keyword">const</font> <font class="keywordtype">char</font> *path)
00272 {
00273 <font class="keywordtype">char</font> *<font class="keyword">new</font>;
00274
00275 _dbus_assert (path != NULL);
00276
00277 <font class="keyword">new</font> = _dbus_strdup (path);
00278 <font class="keywordflow">if</font> (<font class="keyword">new</font> == NULL)
00279 <font class="keywordflow">return</font> FALSE;
00280
00281 rule->flags |= BUS_MATCH_PATH;
00282 dbus_free (rule->path);
00283 rule->path = <font class="keyword">new</font>;
00284
00285 <font class="keywordflow">return</font> TRUE;
00286 }
00287
00288 <font class="comment">/*</font>
00289 <font class="comment"> * The format is comma-separated with strings quoted with single quotes</font>
00290 <font class="comment"> * as for the shell (to escape a literal single quote, use '\'').</font>
00291 <font class="comment"> *</font>
00292 <font class="comment"> * type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='Foo',</font>
00293 <font class="comment"> * path='/bar/foo',destination=':452345-34'</font>
00294 <font class="comment"> *</font>
00295 <font class="comment"> */</font>
00296 BusMatchRule*
00297 bus_match_rule_parse (<a class="code" href="structDBusConnection.html">DBusConnection</a> *matches_go_to,
00298 <font class="keyword">const</font> <a class="code" href="structDBusString.html">DBusString</a> *rule_text,
00299 <a class="code" href="structDBusError.html">DBusError</a> *error)
00300 {
00301 BusMatchRule *rule;
00302
00303 rule = bus_match_rule_new (matches_go_to);
00304 <font class="keywordflow">if</font> (rule == NULL)
00305 <font class="keywordflow">goto</font> oom;
00306
00307 <font class="comment">/* FIXME implement for real */</font>
00308
00309 <font class="keywordflow">if</font> (!bus_match_rule_set_message_type (rule,
00310 DBUS_MESSAGE_TYPE_SIGNAL))
00311 <font class="keywordflow">goto</font> oom;
00312
00313 <font class="keywordflow">return</font> rule;
00314
00315 oom:
00316 <font class="keywordflow">if</font> (rule)
00317 bus_match_rule_unref (rule);
00318 BUS_SET_OOM (error);
00319 <font class="keywordflow">return</font> NULL;
00320 }
00321
00322 <font class="keyword">struct </font>BusMatchmaker
00323 {
00324 <font class="keywordtype">int</font> refcount;
00325
00326 <a class="code" href="structDBusList.html">DBusList</a> *all_rules;
00327 };
00328
00329 BusMatchmaker*
00330 bus_matchmaker_new (<font class="keywordtype">void</font>)
00331 {
00332 BusMatchmaker *matchmaker;
00333
00334 matchmaker = dbus_new0 (BusMatchmaker, 1);
00335 <font class="keywordflow">if</font> (matchmaker == NULL)
00336 <font class="keywordflow">return</font> NULL;
00337
00338 matchmaker->refcount = 1;
00339
00340 <font class="keywordflow">return</font> matchmaker;
00341 }
00342
00343 <font class="keywordtype">void</font>
00344 bus_matchmaker_ref (BusMatchmaker *matchmaker)
00345 {
00346 _dbus_assert (matchmaker->refcount > 0);
00347
00348 matchmaker->refcount += 1;
00349 }
00350
00351 <font class="keywordtype">void</font>
00352 bus_matchmaker_unref (BusMatchmaker *matchmaker)
00353 {
00354 _dbus_assert (matchmaker->refcount > 0);
00355
00356 matchmaker->refcount -= 1;
00357 <font class="keywordflow">if</font> (matchmaker->refcount == 0)
00358 {
00359 <font class="keywordflow">while</font> (matchmaker->all_rules != NULL)
00360 {
00361 BusMatchRule *rule;
00362
00363 rule = matchmaker->all_rules->data;
00364 bus_match_rule_unref (rule);
00365 _dbus_list_remove_link (&matchmaker->all_rules,
00366 matchmaker->all_rules);
00367 }
00368
00369 dbus_free (matchmaker);
00370 }
00371 }
00372
00373 <font class="comment">/* The rule can't be modified after it's added. */</font>
00374 dbus_bool_t
00375 bus_matchmaker_add_rule (BusMatchmaker *matchmaker,
00376 BusMatchRule *rule)
00377 {
00378 _dbus_assert (bus_connection_is_active (rule->matches_go_to));
00379
00380 <font class="keywordflow">if</font> (!_dbus_list_append (&matchmaker->all_rules, rule))
00381 <font class="keywordflow">return</font> FALSE;
00382
00383 <font class="keywordflow">if</font> (!bus_connection_add_match_rule (rule->matches_go_to, rule))
00384 {
00385 _dbus_list_remove_last (&matchmaker->all_rules, rule);
00386 <font class="keywordflow">return</font> FALSE;
00387 }
00388
00389 bus_match_rule_ref (rule);
00390
00391 <font class="preprocessor">#ifdef DBUS_ENABLE_VERBOSE_MODE</font>
00392 <font class="preprocessor"></font> {
00393 <font class="keywordtype">char</font> *s = match_rule_to_string (rule);
00394
00395 _dbus_verbose (<font class="stringliteral">"Added match rule %s to connection %p\n"</font>,
00396 s, rule->matches_go_to);
00397 dbus_free (s);
00398 }
00399 <font class="preprocessor">#endif</font>
00400 <font class="preprocessor"></font>
00401 <font class="keywordflow">return</font> TRUE;
00402 }
00403
00404 <font class="keyword">static</font> dbus_bool_t
00405 match_rule_equal (BusMatchRule *a,
00406 BusMatchRule *b)
00407 {
00408 <font class="keywordflow">if</font> (a->flags != b->flags)
00409 <font class="keywordflow">return</font> FALSE;
00410
00411 <font class="keywordflow">if</font> ((a->flags & BUS_MATCH_MESSAGE_TYPE) &&
00412 a->message_type != b->message_type)
00413 <font class="keywordflow">return</font> FALSE;
00414
00415 <font class="keywordflow">if</font> ((a->flags & BUS_MATCH_MEMBER) &&
00416 strcmp (a->member, b->member) != 0)
00417 <font class="keywordflow">return</font> FALSE;
00418
00419 <font class="keywordflow">if</font> ((a->flags & BUS_MATCH_PATH) &&
00420 strcmp (a->path, b->path) != 0)
00421 <font class="keywordflow">return</font> FALSE;
00422
00423 <font class="keywordflow">if</font> ((a->flags & BUS_MATCH_INTERFACE) &&
00424 strcmp (a->interface, b->interface) != 0)
00425 <font class="keywordflow">return</font> FALSE;
00426
00427 <font class="keywordflow">if</font> ((a->flags & BUS_MATCH_SENDER) &&
00428 strcmp (a->sender, b->sender) != 0)
00429 <font class="keywordflow">return</font> FALSE;
00430
00431 <font class="keywordflow">if</font> ((a->flags & BUS_MATCH_DESTINATION) &&
00432 strcmp (a->destination, b->destination) != 0)
00433 <font class="keywordflow">return</font> FALSE;
00434
00435 <font class="keywordflow">return</font> TRUE;
00436 }
00437
00438 <font class="keyword">static</font> <font class="keywordtype">void</font>
00439 bus_matchmaker_remove_rule_link (BusMatchmaker *matchmaker,
00440 <a class="code" href="structDBusList.html">DBusList</a> *link)
00441 {
00442 BusMatchRule *rule = link-><a class="code" href="structDBusList.html#m2">data</a>;
00443
00444 bus_connection_remove_match_rule (rule->matches_go_to, rule);
00445 _dbus_list_remove_link (&matchmaker->all_rules, link);
00446
00447 <font class="preprocessor">#ifdef DBUS_ENABLE_VERBOSE_MODE</font>
00448 <font class="preprocessor"></font> {
00449 <font class="keywordtype">char</font> *s = match_rule_to_string (rule);
00450
00451 _dbus_verbose (<font class="stringliteral">"Removed match rule %s for connection %p\n"</font>,
00452 s, rule->matches_go_to);
00453 dbus_free (s);
00454 }
00455 <font class="preprocessor">#endif</font>
00456 <font class="preprocessor"></font>
00457 bus_match_rule_unref (rule);
00458 }
00459
00460 <font class="keywordtype">void</font>
00461 bus_matchmaker_remove_rule (BusMatchmaker *matchmaker,
00462 BusMatchRule *rule)
00463 {
00464 bus_connection_remove_match_rule (rule->matches_go_to, rule);
00465 _dbus_list_remove (&matchmaker->all_rules, rule);
00466
00467 <font class="preprocessor">#ifdef DBUS_ENABLE_VERBOSE_MODE</font>
00468 <font class="preprocessor"></font> {
00469 <font class="keywordtype">char</font> *s = match_rule_to_string (rule);
00470
00471 _dbus_verbose (<font class="stringliteral">"Removed match rule %s for connection %p\n"</font>,
00472 s, rule->matches_go_to);
00473 dbus_free (s);
00474 }
00475 <font class="preprocessor">#endif</font>
00476 <font class="preprocessor"></font>
00477 bus_match_rule_unref (rule);
00478 }
00479
00480 <font class="comment">/* Remove a single rule which is equal to the given rule by value */</font>
00481 dbus_bool_t
00482 bus_matchmaker_remove_rule_by_value (BusMatchmaker *matchmaker,
00483 BusMatchRule *value,
00484 <a class="code" href="structDBusError.html">DBusError</a> *error)
00485 {
00486 <font class="comment">/* FIXME this is an unoptimized linear scan */</font>
00487
00488 <a class="code" href="structDBusList.html">DBusList</a> *link;
00489
00490 <font class="comment">/* we traverse backward because bus_connection_remove_match_rule()</font>
00491 <font class="comment"> * removes the most-recently-added rule</font>
00492 <font class="comment"> */</font>
00493 link = _dbus_list_get_last_link (&matchmaker->all_rules);
00494 <font class="keywordflow">while</font> (link != NULL)
00495 {
00496 BusMatchRule *rule;
00497 <a class="code" href="structDBusList.html">DBusList</a> *prev;
00498
00499 rule = link-><a class="code" href="structDBusList.html#m2">data</a>;
00500 prev = _dbus_list_get_prev_link (&matchmaker->all_rules, link);
00501
00502 <font class="keywordflow">if</font> (match_rule_equal (rule, value))
00503 {
00504 bus_matchmaker_remove_rule_link (matchmaker, link);
00505 <font class="keywordflow">break</font>;
00506 }
00507
00508 link = prev;
00509 }
00510
00511 <font class="keywordflow">if</font> (link == NULL)
00512 {
00513 dbus_set_error (error, DBUS_ERROR_MATCH_RULE_NOT_FOUND,
00514 <font class="stringliteral">"The given match rule wasn't found and can't be removed"</font>);
00515 <font class="keywordflow">return</font> FALSE;
00516 }
00517
00518 <font class="keywordflow">return</font> TRUE;
00519 }
00520
00521 <font class="keywordtype">void</font>
00522 bus_matchmaker_disconnected (BusMatchmaker *matchmaker,
00523 <a class="code" href="structDBusConnection.html">DBusConnection</a> *disconnected)
00524 {
00525 <a class="code" href="structDBusList.html">DBusList</a> *link;
00526
00527 <font class="comment">/* FIXME</font>
00528 <font class="comment"> *</font>
00529 <font class="comment"> * This scans all match rules on the bus. We could avoid that</font>
00530 <font class="comment"> * for the rules belonging to the connection, since we keep</font>
00531 <font class="comment"> * a list of those; but for the rules that just refer to</font>
00532 <font class="comment"> * the connection we'd need to do something more elaborate.</font>
00533 <font class="comment"> * </font>
00534 <font class="comment"> */</font>
00535
00536 _dbus_assert (bus_connection_is_active (disconnected));
00537
00538 link = _dbus_list_get_first_link (&matchmaker->all_rules);
00539 <font class="keywordflow">while</font> (link != NULL)
00540 {
00541 BusMatchRule *rule;
00542 <a class="code" href="structDBusList.html">DBusList</a> *next;
00543
00544 rule = link-><a class="code" href="structDBusList.html#m2">data</a>;
00545 next = _dbus_list_get_next_link (&matchmaker->all_rules, link);
00546
00547 <font class="keywordflow">if</font> (rule->matches_go_to == disconnected)
00548 {
00549 bus_matchmaker_remove_rule_link (matchmaker, link);
00550 }
00551 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (((rule->flags & BUS_MATCH_SENDER) && *rule->sender == <font class="charliteral">':'</font>) ||
00552 ((rule->flags & BUS_MATCH_DESTINATION) && *rule->destination == <font class="charliteral">':'</font>))
00553 {
00554 <font class="comment">/* The rule matches to/from a base service, see if it's the</font>
00555 <font class="comment"> * one being disconnected, since we know this service name</font>
00556 <font class="comment"> * will never be recycled.</font>
00557 <font class="comment"> */</font>
00558 <font class="keyword">const</font> <font class="keywordtype">char</font> *name;
00559
00560 name = bus_connection_get_name (disconnected);
00561 _dbus_assert (name != NULL); <font class="comment">/* because we're an active connection */</font>
00562
00563 <font class="keywordflow">if</font> (((rule->flags & BUS_MATCH_SENDER) &&
00564 strcmp (rule->sender, name) == 0) ||
00565 ((rule->flags & BUS_MATCH_DESTINATION) &&
00566 strcmp (rule->destination, name) == 0))
00567 {
00568 bus_matchmaker_remove_rule_link (matchmaker, link);
00569 }
00570 }
00571
00572 link = next;
00573 }
00574 }
00575
00576 <font class="keyword">static</font> dbus_bool_t
00577 connection_is_primary_owner (<a class="code" href="structDBusConnection.html">DBusConnection</a> *connection,
00578 <font class="keyword">const</font> <font class="keywordtype">char</font> *service_name)
00579 {
00580 BusService *service;
00581 <a class="code" href="structDBusString.html">DBusString</a> str;
00582 BusRegistry *registry;
00583
00584 registry = bus_connection_get_registry (connection);
00585
00586 _dbus_string_init_const (&str, service_name);
00587 service = bus_registry_lookup (registry, &str);
00588
00589 <font class="keywordflow">if</font> (service == NULL)
00590 <font class="keywordflow">return</font> FALSE; <font class="comment">/* Service doesn't exist so connection can't own it. */</font>
00591
00592 <font class="keywordflow">return</font> bus_service_get_primary_owner (service) == connection;
00593 }
00594
00595 <font class="keyword">static</font> dbus_bool_t
00596 match_rule_matches (BusMatchRule *rule,
00597 BusConnections *connections,
00598 <a class="code" href="structDBusConnection.html">DBusConnection</a> *sender,
00599 <a class="code" href="structDBusConnection.html">DBusConnection</a> *addressed_recipient,
00600 <a class="code" href="structDBusMessage.html">DBusMessage</a> *message)
00601 {
00602 <font class="comment">/* All features of the match rule are AND'd together,</font>
00603 <font class="comment"> * so FALSE if any of them don't match.</font>
00604 <font class="comment"> */</font>
00605
00606 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_MESSAGE_TYPE)
00607 {
00608 _dbus_assert (rule->message_type != DBUS_MESSAGE_TYPE_INVALID);
00609
00610 <font class="keywordflow">if</font> (rule->message_type != dbus_message_get_type (message))
00611 <font class="keywordflow">return</font> FALSE;
00612 }
00613
00614 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_INTERFACE)
00615 {
00616 <font class="keyword">const</font> <font class="keywordtype">char</font> *iface;
00617
00618 _dbus_assert (rule->interface != NULL);
00619
00620 iface = dbus_message_get_interface (message);
00621 <font class="keywordflow">if</font> (iface == NULL)
00622 <font class="keywordflow">return</font> FALSE;
00623
00624 <font class="keywordflow">if</font> (strcmp (iface, rule->interface) != 0)
00625 <font class="keywordflow">return</font> FALSE;
00626 }
00627
00628 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_MEMBER)
00629 {
00630 <font class="keyword">const</font> <font class="keywordtype">char</font> *member;
00631
00632 _dbus_assert (rule->member != NULL);
00633
00634 member = dbus_message_get_member (message);
00635 <font class="keywordflow">if</font> (member == NULL)
00636 <font class="keywordflow">return</font> FALSE;
00637
00638 <font class="keywordflow">if</font> (strcmp (member, rule->member) != 0)
00639 <font class="keywordflow">return</font> FALSE;
00640 }
00641
00642 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_SENDER)
00643 {
00644 _dbus_assert (rule->sender != NULL);
00645
00646 <font class="keywordflow">if</font> (!connection_is_primary_owner (sender, rule->sender))
00647 <font class="keywordflow">return</font> FALSE;
00648 }
00649
00650 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_DESTINATION)
00651 {
00652 <font class="keyword">const</font> <font class="keywordtype">char</font> *destination;
00653
00654 _dbus_assert (rule->destination != NULL);
00655
00656 <font class="keywordflow">if</font> (addressed_recipient == NULL)
00657 <font class="keywordflow">return</font> FALSE;
00658
00659 destination = dbus_message_get_destination (message);
00660 <font class="keywordflow">if</font> (destination == NULL)
00661 <font class="keywordflow">return</font> FALSE;
00662
00663 <font class="keywordflow">if</font> (!connection_is_primary_owner (addressed_recipient, rule->destination))
00664 <font class="keywordflow">return</font> FALSE;
00665 }
00666
00667 <font class="keywordflow">if</font> (rule->flags & BUS_MATCH_PATH)
00668 {
00669 <font class="keyword">const</font> <font class="keywordtype">char</font> *path;
00670
00671 _dbus_assert (rule->path != NULL);
00672
00673 path = dbus_message_get_path (message);
00674 <font class="keywordflow">if</font> (path == NULL)
00675 <font class="keywordflow">return</font> FALSE;
00676
00677 <font class="keywordflow">if</font> (strcmp (path, rule->path) != 0)
00678 <font class="keywordflow">return</font> FALSE;
00679 }
00680
00681 <font class="keywordflow">return</font> TRUE;
00682 }
00683
00684 dbus_bool_t
00685 bus_matchmaker_get_recipients (BusMatchmaker *matchmaker,
00686 BusConnections *connections,
00687 <a class="code" href="structDBusConnection.html">DBusConnection</a> *sender,
00688 <a class="code" href="structDBusConnection.html">DBusConnection</a> *addressed_recipient,
00689 <a class="code" href="structDBusMessage.html">DBusMessage</a> *message,
00690 <a class="code" href="structDBusList.html">DBusList</a> **recipients_p)
00691 {
00692 <font class="comment">/* FIXME for now this is a wholly unoptimized linear search */</font>
00693 <font class="comment">/* Guessing the important optimization is to skip the signal-related</font>
00694 <font class="comment"> * match lists when processing method call and exception messages.</font>
00695 <font class="comment"> * So separate match rule lists for signals?</font>
00696 <font class="comment"> */</font>
00697
00698 <a class="code" href="structDBusList.html">DBusList</a> *link;
00699
00700 _dbus_assert (*recipients_p == NULL);
00701
00702 <font class="comment">/* This avoids sending same message to the same connection twice.</font>
00703 <font class="comment"> * Purpose of the stamp instead of a bool is to avoid iterating over</font>
00704 <font class="comment"> * all connections resetting the bool each time.</font>
00705 <font class="comment"> */</font>
00706 bus_connections_increment_stamp (connections);
00707
00708 <font class="comment">/* addressed_recipient is already receiving the message, don't add to list.</font>
00709 <font class="comment"> * NULL addressed_recipient means either bus driver, or this is a signal</font>
00710 <font class="comment"> * and thus lacks a specific addressed_recipient.</font>
00711 <font class="comment"> */</font>
00712 <font class="keywordflow">if</font> (addressed_recipient != NULL)
00713 bus_connection_mark_stamp (addressed_recipient);
00714
00715 link = _dbus_list_get_first_link (&matchmaker->all_rules);
00716 <font class="keywordflow">while</font> (link != NULL)
00717 {
00718 BusMatchRule *rule;
00719
00720 rule = link-><a class="code" href="structDBusList.html#m2">data</a>;
00721
00722 <font class="preprocessor">#ifdef DBUS_ENABLE_VERBOSE_MODE</font>
00723 <font class="preprocessor"></font> {
00724 <font class="keywordtype">char</font> *s = match_rule_to_string (rule);
00725
00726 _dbus_verbose (<font class="stringliteral">"Checking whether message matches rule %s for connection %p\n"</font>,
00727 s, rule->matches_go_to);
00728 dbus_free (s);
00729 }
00730 <font class="preprocessor">#endif</font>
00731 <font class="preprocessor"></font>
00732 <font class="keywordflow">if</font> (match_rule_matches (rule, connections,
00733 sender, addressed_recipient, message))
00734 {
00735 _dbus_verbose (<font class="stringliteral">"Rule matched\n"</font>);
00736
00737 <font class="comment">/* Append to the list if we haven't already */</font>
00738 <font class="keywordflow">if</font> (bus_connection_mark_stamp (rule->matches_go_to))
00739 {
00740 <font class="keywordflow">if</font> (!_dbus_list_append (recipients_p, rule->matches_go_to))
00741 <font class="keywordflow">goto</font> nomem;
00742 }
00743 <font class="preprocessor">#ifdef DBUS_ENABLE_VERBOSE_MODE</font>
00744 <font class="preprocessor"></font> <font class="keywordflow">else</font>
00745 {
00746 _dbus_verbose (<font class="stringliteral">"Connection already receiving this message, so not adding again\n"</font>);
00747 }
00748 <font class="preprocessor">#endif </font><font class="comment">/* DBUS_ENABLE_VERBOSE_MODE */</font>
00749 }
00750
00751 link = _dbus_list_get_next_link (&matchmaker->all_rules, link);
00752 }
00753
00754 <font class="keywordflow">return</font> TRUE;
00755
00756 nomem:
00757 _dbus_list_clear (recipients_p);
00758 <font class="keywordflow">return</font> FALSE;
00759 }
00760
00761 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00762 <font class="preprocessor"></font><font class="preprocessor">#include "test.h"</font>
00763
00764 dbus_bool_t
00765 bus_signals_test (<font class="keyword">const</font> <a class="code" href="structDBusString.html">DBusString</a> *test_data_dir)
00766 {
00767 BusMatchmaker *matchmaker;
00768
00769 matchmaker = bus_matchmaker_new ();
00770 bus_matchmaker_ref (matchmaker);
00771 bus_matchmaker_unref (matchmaker);
00772 bus_matchmaker_unref (matchmaker);
00773
00774 <font class="keywordflow">return</font> TRUE;
00775 }
00776
00777 <font class="preprocessor">#endif </font><font class="comment">/* DBUS_BUILD_TESTS */</font>
00778
</pre></div><hr><address align="right"><small>Generated on Mon Sep 29 21:31:02 2003 for D-BUS by
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