Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * D-Bus++ - C++ bindings for D-Bus |
| 4 | * |
| 5 | * Copyright (C) 2005-2007 Paolo Durante <shackan@gmail.com> |
| 6 | * |
| 7 | * |
| 8 | * This library is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This library 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 GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with this library; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #ifdef HAVE_CONFIG_H |
| 25 | #include <config.h> |
| 26 | #endif |
| 27 | |
| 28 | #include <dbus-c++/debug.h> |
| 29 | #include <dbus-c++/connection.h> |
| 30 | |
| 31 | #include <dbus/dbus.h> |
| 32 | #include <string> |
| 33 | |
| 34 | #include "internalerror.h" |
| 35 | |
| 36 | #include "connection_p.h" |
| 37 | #include "dispatcher_p.h" |
| 38 | #include "server_p.h" |
| 39 | #include "message_p.h" |
| 40 | #include "pendingcall_p.h" |
| 41 | |
| 42 | using namespace DBus; |
| 43 | |
| 44 | Connection::Private::Private(DBusConnection *c, Server::Private *s) |
| 45 | : conn(c) , dispatcher(NULL), server(s) |
| 46 | { |
| 47 | init(); |
| 48 | } |
| 49 | |
| 50 | Connection::Private::Private(DBusBusType type) |
| 51 | : dispatcher(NULL), server(NULL) |
| 52 | { |
| 53 | InternalError e; |
| 54 | |
| 55 | conn = dbus_bus_get_private(type, e); |
| 56 | |
| 57 | if (e) throw Error(e); |
| 58 | |
| 59 | init(); |
| 60 | } |
| 61 | |
| 62 | Connection::Private::~Private() |
| 63 | { |
| 64 | debug_log("terminating connection 0x%08x", conn); |
| 65 | |
| 66 | detach_server(); |
| 67 | |
| 68 | if (dbus_connection_get_is_connected(conn)) |
| 69 | { |
| 70 | std::vector<std::string>::iterator i = names.begin(); |
| 71 | |
| 72 | while (i != names.end()) |
| 73 | { |
| 74 | debug_log("%s: releasing bus name %s", dbus_bus_get_unique_name(conn), i->c_str()); |
| 75 | dbus_bus_release_name(conn, i->c_str(), NULL); |
| 76 | ++i; |
| 77 | } |
| 78 | dbus_connection_close(conn); |
| 79 | } |
| 80 | dbus_connection_unref(conn); |
| 81 | } |
| 82 | |
| 83 | void Connection::Private::init() |
| 84 | { |
| 85 | dbus_connection_ref(conn); |
| 86 | dbus_connection_ref(conn); //todo: the library has to own another reference |
| 87 | |
| 88 | disconn_filter = new Callback<Connection::Private, bool, const Message &>( |
| 89 | this, &Connection::Private::disconn_filter_function |
| 90 | ); |
| 91 | |
| 92 | dbus_connection_add_filter(conn, message_filter_stub, &disconn_filter, NULL); // TODO: some assert at least |
| 93 | |
| 94 | dbus_connection_set_dispatch_status_function(conn, dispatch_status_stub, this, 0); |
| 95 | dbus_connection_set_exit_on_disconnect(conn, false); //why was this set to true?? |
| 96 | } |
| 97 | |
| 98 | void Connection::Private::detach_server() |
| 99 | { |
| 100 | /* Server::Private *tmp = server; |
| 101 | |
| 102 | server = NULL; |
| 103 | |
| 104 | if (tmp) |
| 105 | { |
| 106 | ConnectionList::iterator i; |
| 107 | |
| 108 | for (i = tmp->connections.begin(); i != tmp->connections.end(); ++i) |
| 109 | { |
| 110 | if (i->_pvt.get() == this) |
| 111 | { |
| 112 | tmp->connections.erase(i); |
| 113 | break; |
| 114 | } |
| 115 | } |
| 116 | }*/ |
| 117 | } |
| 118 | |
| 119 | bool Connection::Private::do_dispatch() |
| 120 | { |
| 121 | debug_log("dispatching on %p", conn); |
| 122 | |
| 123 | if (!dbus_connection_get_is_connected(conn)) |
| 124 | { |
| 125 | debug_log("connection terminated"); |
| 126 | |
| 127 | detach_server(); |
| 128 | |
| 129 | return true; |
| 130 | } |
| 131 | |
| 132 | return dbus_connection_dispatch(conn) != DBUS_DISPATCH_DATA_REMAINS; |
| 133 | } |
| 134 | |
| 135 | void Connection::Private::dispatch_status_stub(DBusConnection *dc, DBusDispatchStatus status, void *data) |
| 136 | { |
| 137 | Private *p = static_cast<Private *>(data); |
| 138 | |
| 139 | switch (status) |
| 140 | { |
| 141 | case DBUS_DISPATCH_DATA_REMAINS: |
| 142 | debug_log("some dispatching to do on %p", dc); |
| 143 | p->dispatcher->queue_connection(p); |
| 144 | break; |
| 145 | |
| 146 | case DBUS_DISPATCH_COMPLETE: |
| 147 | debug_log("all dispatching done on %p", dc); |
| 148 | break; |
| 149 | |
| 150 | case DBUS_DISPATCH_NEED_MEMORY: //uh oh... |
| 151 | debug_log("connection %p needs memory", dc); |
| 152 | break; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | DBusHandlerResult Connection::Private::message_filter_stub(DBusConnection *conn, DBusMessage *dmsg, void *data) |
| 157 | { |
| 158 | MessageSlot *slot = static_cast<MessageSlot *>(data); |
| 159 | |
| 160 | Message msg = Message(new Message::Private(dmsg)); |
| 161 | |
| 162 | return slot && !slot->empty() && slot->call(msg) |
| 163 | ? DBUS_HANDLER_RESULT_HANDLED |
| 164 | : DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| 165 | } |
| 166 | |
| 167 | bool Connection::Private::disconn_filter_function(const Message &msg) |
| 168 | { |
| 169 | if (msg.is_signal(DBUS_INTERFACE_LOCAL, "Disconnected")) |
| 170 | { |
| 171 | debug_log("%p disconnected by local bus", conn); |
| 172 | dbus_connection_close(conn); |
| 173 | |
| 174 | return true; |
| 175 | } |
| 176 | return false; |
| 177 | } |
| 178 | |
| 179 | DBusDispatchStatus Connection::Private::dispatch_status() |
| 180 | { |
| 181 | return dbus_connection_get_dispatch_status(conn); |
| 182 | } |
| 183 | |
| 184 | bool Connection::Private::has_something_to_dispatch() |
| 185 | { |
| 186 | return dispatch_status() == DBUS_DISPATCH_DATA_REMAINS; |
| 187 | } |
| 188 | |
| 189 | |
| 190 | Connection Connection::SystemBus() |
| 191 | { |
| 192 | return Connection(new Private(DBUS_BUS_SYSTEM)); |
| 193 | } |
| 194 | |
| 195 | Connection Connection::SessionBus() |
| 196 | { |
| 197 | return Connection(new Private(DBUS_BUS_SESSION)); |
| 198 | } |
| 199 | |
| 200 | Connection Connection::ActivationBus() |
| 201 | { |
| 202 | return Connection(new Private(DBUS_BUS_STARTER)); |
| 203 | } |
| 204 | |
| 205 | Connection::Connection(const char *address, bool priv) |
| 206 | : _timeout(-1) |
| 207 | { |
| 208 | InternalError e; |
| 209 | DBusConnection *conn = priv |
| 210 | ? dbus_connection_open_private(address, e) |
| 211 | : dbus_connection_open(address, e); |
| 212 | |
| 213 | if (e) throw Error(e); |
| 214 | |
| 215 | _pvt = new Private(conn); |
| 216 | |
| 217 | setup(default_dispatcher); |
| 218 | |
| 219 | debug_log("connected to %s", address); |
| 220 | } |
| 221 | |
| 222 | Connection::Connection(Connection::Private *p) |
| 223 | : _pvt(p), _timeout(-1) |
| 224 | { |
| 225 | setup(default_dispatcher); |
| 226 | } |
| 227 | |
| 228 | Connection::Connection(const Connection &c) |
| 229 | : _pvt(c._pvt), _timeout(c._timeout) |
| 230 | { |
| 231 | dbus_connection_ref(_pvt->conn); |
| 232 | } |
| 233 | |
| 234 | Connection::~Connection() |
| 235 | { |
| 236 | dbus_connection_unref(_pvt->conn); |
| 237 | } |
| 238 | |
| 239 | Dispatcher *Connection::setup(Dispatcher *dispatcher) |
| 240 | { |
| 241 | debug_log("registering stubs for connection %p", _pvt->conn); |
| 242 | |
| 243 | if (!dispatcher) dispatcher = default_dispatcher; |
| 244 | |
| 245 | if (!dispatcher) throw ErrorFailed("no default dispatcher set for new connection"); |
| 246 | |
| 247 | Dispatcher *prev = _pvt->dispatcher; |
| 248 | |
| 249 | _pvt->dispatcher = dispatcher; |
| 250 | |
| 251 | dispatcher->queue_connection(_pvt.get()); |
| 252 | |
| 253 | dbus_connection_set_watch_functions( |
| 254 | _pvt->conn, |
| 255 | Dispatcher::Private::on_add_watch, |
| 256 | Dispatcher::Private::on_rem_watch, |
| 257 | Dispatcher::Private::on_toggle_watch, |
| 258 | dispatcher, |
| 259 | 0 |
| 260 | ); |
| 261 | |
| 262 | dbus_connection_set_timeout_functions( |
| 263 | _pvt->conn, |
| 264 | Dispatcher::Private::on_add_timeout, |
| 265 | Dispatcher::Private::on_rem_timeout, |
| 266 | Dispatcher::Private::on_toggle_timeout, |
| 267 | dispatcher, |
| 268 | 0 |
| 269 | ); |
| 270 | |
| 271 | return prev; |
| 272 | } |
| 273 | |
| 274 | bool Connection::operator == (const Connection &c) const |
| 275 | { |
| 276 | return _pvt->conn == c._pvt->conn; |
| 277 | } |
| 278 | |
| 279 | bool Connection::register_bus() |
| 280 | { |
| 281 | InternalError e; |
| 282 | |
| 283 | bool r = dbus_bus_register(_pvt->conn, e); |
| 284 | |
| 285 | if (e) throw(e); |
| 286 | |
| 287 | return r; |
| 288 | } |
| 289 | |
| 290 | bool Connection::connected() const |
| 291 | { |
| 292 | return dbus_connection_get_is_connected(_pvt->conn); |
| 293 | } |
| 294 | |
| 295 | void Connection::disconnect() |
| 296 | { |
| 297 | // dbus_connection_disconnect(_pvt->conn); // disappeared in 0.9x |
| 298 | dbus_connection_close(_pvt->conn); |
| 299 | } |
| 300 | |
| 301 | void Connection::exit_on_disconnect(bool exit) |
| 302 | { |
| 303 | dbus_connection_set_exit_on_disconnect(_pvt->conn, exit); |
| 304 | } |
| 305 | |
| 306 | bool Connection::unique_name(const char *n) |
| 307 | { |
| 308 | return dbus_bus_set_unique_name(_pvt->conn, n); |
| 309 | } |
| 310 | |
| 311 | const char *Connection::unique_name() const |
| 312 | { |
| 313 | return dbus_bus_get_unique_name(_pvt->conn); |
| 314 | } |
| 315 | |
| 316 | void Connection::flush() |
| 317 | { |
| 318 | dbus_connection_flush(_pvt->conn); |
| 319 | } |
| 320 | |
| 321 | void Connection::add_match(const char *rule) |
| 322 | { |
| 323 | InternalError e; |
| 324 | |
| 325 | dbus_bus_add_match(_pvt->conn, rule, e); |
| 326 | |
| 327 | debug_log("%s: added match rule %s", unique_name(), rule); |
| 328 | |
| 329 | if (e) throw Error(e); |
| 330 | } |
| 331 | |
| 332 | void Connection::remove_match(const char *rule, |
| 333 | bool throw_on_error) |
| 334 | { |
| 335 | InternalError e; |
| 336 | |
| 337 | dbus_bus_remove_match(_pvt->conn, rule, e); |
| 338 | |
| 339 | debug_log("%s: removed match rule %s", unique_name(), rule); |
| 340 | |
| 341 | if (e) |
| 342 | { |
| 343 | if (throw_on_error) |
| 344 | throw Error(e); |
| 345 | else |
| 346 | debug_log("DBus::Connection::remove_match: %s (%s).", |
| 347 | static_cast<DBusError *>(e)->message, |
| 348 | static_cast<DBusError *>(e)->name); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | bool Connection::add_filter(MessageSlot &s) |
| 353 | { |
| 354 | debug_log("%s: adding filter", unique_name()); |
| 355 | return dbus_connection_add_filter(_pvt->conn, Private::message_filter_stub, &s, NULL); |
| 356 | } |
| 357 | |
| 358 | void Connection::remove_filter(MessageSlot &s) |
| 359 | { |
| 360 | debug_log("%s: removing filter", unique_name()); |
| 361 | dbus_connection_remove_filter(_pvt->conn, Private::message_filter_stub, &s); |
| 362 | } |
| 363 | |
| 364 | bool Connection::send(const Message &msg, unsigned int *serial) |
| 365 | { |
| 366 | return dbus_connection_send(_pvt->conn, msg._pvt->msg, serial); |
| 367 | } |
| 368 | |
| 369 | Message Connection::send_blocking(Message &msg, int timeout) |
| 370 | { |
| 371 | DBusMessage *reply; |
| 372 | InternalError e; |
| 373 | |
| 374 | if (this->_timeout != -1) |
| 375 | { |
| 376 | reply = dbus_connection_send_with_reply_and_block(_pvt->conn, msg._pvt->msg, this->_timeout, e); |
| 377 | } |
| 378 | else |
| 379 | { |
| 380 | reply = dbus_connection_send_with_reply_and_block(_pvt->conn, msg._pvt->msg, timeout, e); |
| 381 | } |
| 382 | |
| 383 | if (e) throw Error(e); |
| 384 | |
| 385 | return Message(new Message::Private(reply), false); |
| 386 | } |
| 387 | |
| 388 | PendingCall Connection::send_async(Message &msg, int timeout) |
| 389 | { |
| 390 | DBusPendingCall *pending; |
| 391 | |
| 392 | if (!dbus_connection_send_with_reply(_pvt->conn, msg._pvt->msg, &pending, timeout)) |
| 393 | { |
| 394 | throw ErrorNoMemory("Unable to start asynchronous call"); |
| 395 | } |
| 396 | return PendingCall(new PendingCall::Private(pending)); |
| 397 | } |
| 398 | |
| 399 | void Connection::request_name(const char *name, int flags) |
| 400 | { |
| 401 | InternalError e; |
| 402 | |
| 403 | debug_log("%s: registering bus name %s", unique_name(), name); |
| 404 | |
| 405 | /* |
| 406 | * TODO: |
| 407 | * Think about giving back the 'ret' value. Some people on the list |
| 408 | * requested about this... |
| 409 | */ |
| 410 | int ret = dbus_bus_request_name(_pvt->conn, name, flags, e); |
| 411 | |
| 412 | if (ret == -1) |
| 413 | { |
| 414 | if (e) throw Error(e); |
| 415 | } |
| 416 | |
| 417 | // this->remove_match("destination"); |
| 418 | |
| 419 | if (name) |
| 420 | { |
| 421 | _pvt->names.push_back(name); |
| 422 | std::string match = "destination='" + _pvt->names.back() + "'"; |
| 423 | add_match(match.c_str()); |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | unsigned long Connection::sender_unix_uid(const char *sender) |
| 428 | { |
| 429 | InternalError e; |
| 430 | |
| 431 | unsigned long ul = dbus_bus_get_unix_user(_pvt->conn, sender, e); |
| 432 | |
| 433 | if (e) throw Error(e); |
| 434 | |
| 435 | return ul; |
| 436 | } |
| 437 | |
| 438 | bool Connection::has_name(const char *name) |
| 439 | { |
| 440 | InternalError e; |
| 441 | |
| 442 | bool b = dbus_bus_name_has_owner(_pvt->conn, name, e); |
| 443 | |
| 444 | if (e) throw Error(e); |
| 445 | |
| 446 | return b; |
| 447 | } |
| 448 | |
| 449 | const std::vector<std::string>& Connection::names() |
| 450 | { |
| 451 | return _pvt->names; |
| 452 | } |
| 453 | |
| 454 | bool Connection::start_service(const char *name, unsigned long flags) |
| 455 | { |
| 456 | InternalError e; |
| 457 | |
| 458 | bool b = dbus_bus_start_service_by_name(_pvt->conn, name, flags, NULL, e); |
| 459 | |
| 460 | if (e) throw Error(e); |
| 461 | |
| 462 | return b; |
| 463 | } |
| 464 | |
| 465 | void Connection::set_timeout(int timeout) |
| 466 | { |
| 467 | _timeout = timeout; |
| 468 | } |
| 469 | |
| 470 | int Connection::get_timeout() |
| 471 | { |
| 472 | return _timeout; |
| 473 | } |
| 474 | |