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++/object.h> |
| 30 | #include "internalerror.h" |
| 31 | |
| 32 | #include <cstring> |
| 33 | #include <map> |
| 34 | #include <dbus/dbus.h> |
| 35 | |
| 36 | #include "message_p.h" |
| 37 | #include "server_p.h" |
| 38 | #include "connection_p.h" |
| 39 | |
| 40 | using namespace DBus; |
| 41 | |
| 42 | Object::Object(Connection &conn, const Path &path, const char *service) |
| 43 | : _conn(conn), _path(path), _service(service ? service : ""), _default_timeout(-1) |
| 44 | { |
| 45 | } |
| 46 | |
| 47 | Object::~Object() |
| 48 | { |
| 49 | } |
| 50 | |
| 51 | void Object::set_timeout(int new_timeout) |
| 52 | { |
| 53 | debug_log("%s: %d millies", __PRETTY_FUNCTION__, new_timeout); |
| 54 | if (new_timeout < 0 && new_timeout != -1) |
| 55 | throw ErrorInvalidArgs("Bad timeout, cannot set it"); |
| 56 | _default_timeout = new_timeout; |
| 57 | } |
| 58 | |
| 59 | struct ObjectAdaptor::Private |
| 60 | { |
| 61 | static void unregister_function_stub(DBusConnection *, void *); |
| 62 | static DBusHandlerResult message_function_stub(DBusConnection *, DBusMessage *, void *); |
| 63 | }; |
| 64 | |
| 65 | static DBusObjectPathVTable _vtable = |
| 66 | { |
| 67 | ObjectAdaptor::Private::unregister_function_stub, |
| 68 | ObjectAdaptor::Private::message_function_stub, |
| 69 | NULL, NULL, NULL, NULL |
| 70 | }; |
| 71 | |
| 72 | void ObjectAdaptor::Private::unregister_function_stub(DBusConnection *conn, void *data) |
| 73 | { |
| 74 | //TODO: what do we have to do here ? |
| 75 | } |
| 76 | |
| 77 | DBusHandlerResult ObjectAdaptor::Private::message_function_stub(DBusConnection *, DBusMessage *dmsg, void *data) |
| 78 | { |
| 79 | ObjectAdaptor *o = static_cast<ObjectAdaptor *>(data); |
| 80 | |
| 81 | if (o) |
| 82 | { |
| 83 | Message msg(new Message::Private(dmsg)); |
| 84 | |
| 85 | debug_log("in object %s", o->path().c_str()); |
| 86 | debug_log(" got message #%d from %s to %s", |
| 87 | msg.serial(), |
| 88 | msg.sender(), |
| 89 | msg.destination() |
| 90 | ); |
| 91 | |
| 92 | return o->handle_message(msg) |
| 93 | ? DBUS_HANDLER_RESULT_HANDLED |
| 94 | : DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| 95 | } |
| 96 | else |
| 97 | { |
| 98 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | typedef std::map<Path, ObjectAdaptor *> ObjectAdaptorTable; |
| 103 | static ObjectAdaptorTable _adaptor_table; |
| 104 | |
| 105 | ObjectAdaptor *ObjectAdaptor::from_path(const Path &path) |
| 106 | { |
| 107 | ObjectAdaptorTable::iterator ati = _adaptor_table.find(path); |
| 108 | |
| 109 | if (ati != _adaptor_table.end()) |
| 110 | return ati->second; |
| 111 | |
| 112 | return NULL; |
| 113 | } |
| 114 | |
| 115 | ObjectAdaptorPList ObjectAdaptor::from_path_prefix(const std::string &prefix) |
| 116 | { |
| 117 | ObjectAdaptorPList ali; |
| 118 | |
| 119 | ObjectAdaptorTable::iterator ati = _adaptor_table.begin(); |
| 120 | |
| 121 | size_t plen = prefix.length(); |
| 122 | |
| 123 | while (ati != _adaptor_table.end()) |
| 124 | { |
| 125 | if (!strncmp(ati->second->path().c_str(), prefix.c_str(), plen)) |
| 126 | ali.push_back(ati->second); |
| 127 | |
| 128 | ++ati; |
| 129 | } |
| 130 | |
| 131 | return ali; |
| 132 | } |
| 133 | |
| 134 | ObjectPathList ObjectAdaptor::child_nodes_from_prefix(const std::string &prefix) |
| 135 | { |
| 136 | ObjectPathList ali; |
| 137 | |
| 138 | ObjectAdaptorTable::iterator ati = _adaptor_table.begin(); |
| 139 | |
| 140 | size_t plen = prefix.length(); |
| 141 | |
| 142 | while (ati != _adaptor_table.end()) |
| 143 | { |
| 144 | if (!strncmp(ati->second->path().c_str(), prefix.c_str(), plen)) |
| 145 | { |
| 146 | std::string p = ati->second->path().substr(plen); |
| 147 | p = p.substr(0, p.find('/')); |
| 148 | ali.push_back(p); |
| 149 | } |
| 150 | ++ati; |
| 151 | } |
| 152 | |
| 153 | ali.sort(); |
| 154 | ali.unique(); |
| 155 | |
| 156 | return ali; |
| 157 | } |
| 158 | |
| 159 | ObjectAdaptor::ObjectAdaptor(Connection &conn, const Path &path) |
| 160 | : Object(conn, path, conn.unique_name()) |
| 161 | { |
| 162 | register_obj(); |
| 163 | } |
| 164 | |
| 165 | ObjectAdaptor::~ObjectAdaptor() |
| 166 | { |
| 167 | unregister_obj(false); |
| 168 | } |
| 169 | |
| 170 | void ObjectAdaptor::register_obj() |
| 171 | { |
| 172 | debug_log("registering local object %s", path().c_str()); |
| 173 | |
| 174 | if (!dbus_connection_register_object_path(conn()._pvt->conn, path().c_str(), &_vtable, this)) |
| 175 | { |
| 176 | throw ErrorNoMemory("unable to register object path"); |
| 177 | } |
| 178 | |
| 179 | _adaptor_table[path()] = this; |
| 180 | } |
| 181 | |
| 182 | void ObjectAdaptor::unregister_obj(bool) |
| 183 | { |
| 184 | _adaptor_table.erase(path()); |
| 185 | |
| 186 | debug_log("unregistering local object %s", path().c_str()); |
| 187 | |
| 188 | dbus_connection_unregister_object_path(conn()._pvt->conn, path().c_str()); |
| 189 | } |
| 190 | |
| 191 | void ObjectAdaptor::_emit_signal(SignalMessage &sig) |
| 192 | { |
| 193 | sig.path(path().c_str()); |
| 194 | |
| 195 | conn().send(sig); |
| 196 | } |
| 197 | |
| 198 | struct ReturnLaterError |
| 199 | { |
| 200 | const Tag *tag; |
| 201 | }; |
| 202 | |
| 203 | bool ObjectAdaptor::handle_message(const Message &msg) |
| 204 | { |
| 205 | switch (msg.type()) |
| 206 | { |
| 207 | case DBUS_MESSAGE_TYPE_METHOD_CALL: |
| 208 | { |
| 209 | const CallMessage &cmsg = reinterpret_cast<const CallMessage &>(msg); |
| 210 | const char *member = cmsg.member(); |
| 211 | const char *interface = cmsg.interface(); |
| 212 | |
| 213 | debug_log(" invoking method %s.%s", interface, member); |
| 214 | |
| 215 | InterfaceAdaptor *ii = find_interface(interface); |
| 216 | if (ii) |
| 217 | { |
| 218 | try |
| 219 | { |
| 220 | Message ret = ii->dispatch_method(cmsg); |
| 221 | conn().send(ret); |
| 222 | } |
| 223 | catch (Error &e) |
| 224 | { |
| 225 | ErrorMessage em(cmsg, e.name(), e.message()); |
| 226 | conn().send(em); |
| 227 | } |
| 228 | catch (ReturnLaterError &rle) |
| 229 | { |
| 230 | _continuations[rle.tag] = new Continuation(conn(), cmsg, rle.tag); |
| 231 | } |
| 232 | return true; |
| 233 | } |
| 234 | else |
| 235 | { |
| 236 | return false; |
| 237 | } |
| 238 | } |
| 239 | default: |
| 240 | { |
| 241 | return false; |
| 242 | } |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | void ObjectAdaptor::return_later(const Tag *tag) |
| 247 | { |
| 248 | ReturnLaterError rle = { tag }; |
| 249 | throw rle; |
| 250 | } |
| 251 | |
| 252 | void ObjectAdaptor::return_now(Continuation *ret) |
| 253 | { |
| 254 | ret->_conn.send(ret->_return); |
| 255 | |
| 256 | ContinuationMap::iterator di = _continuations.find(ret->_tag); |
| 257 | |
| 258 | delete di->second; |
| 259 | |
| 260 | _continuations.erase(di); |
| 261 | } |
| 262 | |
| 263 | void ObjectAdaptor::return_error(Continuation *ret, const Error error) |
| 264 | { |
| 265 | ret->_conn.send(ErrorMessage(ret->_call, error.name(), error.message())); |
| 266 | |
| 267 | ContinuationMap::iterator di = _continuations.find(ret->_tag); |
| 268 | |
| 269 | delete di->second; |
| 270 | |
| 271 | _continuations.erase(di); |
| 272 | } |
| 273 | |
| 274 | ObjectAdaptor::Continuation *ObjectAdaptor::find_continuation(const Tag *tag) |
| 275 | { |
| 276 | ContinuationMap::iterator di = _continuations.find(tag); |
| 277 | |
| 278 | return di != _continuations.end() ? di->second : NULL; |
| 279 | } |
| 280 | |
| 281 | ObjectAdaptor::Continuation::Continuation(Connection &conn, const CallMessage &call, const Tag *tag) |
| 282 | : _conn(conn), _call(call), _return(_call), _tag(tag) |
| 283 | { |
| 284 | _writer = _return.writer(); //todo: verify |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | */ |
| 289 | |
| 290 | ObjectProxy::ObjectProxy(Connection &conn, const Path &path, const char *service) |
| 291 | : Object(conn, path, service) |
| 292 | { |
| 293 | register_obj(); |
| 294 | } |
| 295 | |
| 296 | ObjectProxy::~ObjectProxy() |
| 297 | { |
| 298 | unregister_obj(false); |
| 299 | } |
| 300 | |
| 301 | void ObjectProxy::register_obj() |
| 302 | { |
| 303 | debug_log("registering remote object %s", path().c_str()); |
| 304 | |
| 305 | _filtered = new Callback<ObjectProxy, bool, const Message &>(this, &ObjectProxy::handle_message); |
| 306 | |
| 307 | conn().add_filter(_filtered); |
| 308 | |
| 309 | InterfaceProxyTable::const_iterator ii = _interfaces.begin(); |
| 310 | while (ii != _interfaces.end()) |
| 311 | { |
| 312 | std::string im = "type='signal',interface='" + ii->first + "',path='" + path() + "'"; |
| 313 | conn().add_match(im.c_str()); |
| 314 | ++ii; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | void ObjectProxy::unregister_obj(bool throw_on_error) |
| 319 | { |
| 320 | debug_log("unregistering remote object %s", path().c_str()); |
| 321 | |
| 322 | InterfaceProxyTable::const_iterator ii = _interfaces.begin(); |
| 323 | while (ii != _interfaces.end()) |
| 324 | { |
| 325 | std::string im = "type='signal',interface='" + ii->first + "',path='" + path() + "'"; |
| 326 | conn().remove_match(im.c_str(), throw_on_error); |
| 327 | ++ii; |
| 328 | } |
| 329 | conn().remove_filter(_filtered); |
| 330 | } |
| 331 | |
| 332 | Message ObjectProxy::_invoke_method(CallMessage &call) |
| 333 | { |
| 334 | if (call.path() == NULL) |
| 335 | call.path(path().c_str()); |
| 336 | |
| 337 | if (call.destination() == NULL) |
| 338 | call.destination(service().c_str()); |
| 339 | |
| 340 | return conn().send_blocking(call, get_timeout()); |
| 341 | } |
| 342 | |
| 343 | bool ObjectProxy::_invoke_method_noreply(CallMessage &call) |
| 344 | { |
| 345 | if (call.path() == NULL) |
| 346 | call.path(path().c_str()); |
| 347 | |
| 348 | if (call.destination() == NULL) |
| 349 | call.destination(service().c_str()); |
| 350 | |
| 351 | return conn().send(call); |
| 352 | } |
| 353 | |
| 354 | bool ObjectProxy::handle_message(const Message &msg) |
| 355 | { |
| 356 | switch (msg.type()) |
| 357 | { |
| 358 | case DBUS_MESSAGE_TYPE_SIGNAL: |
| 359 | { |
| 360 | const SignalMessage &smsg = reinterpret_cast<const SignalMessage &>(msg); |
| 361 | const char *interface = smsg.interface(); |
| 362 | const char *member = smsg.member(); |
| 363 | const char *objpath = smsg.path(); |
| 364 | |
| 365 | if (objpath != path()) return false; |
| 366 | |
| 367 | debug_log("filtered signal %s(in %s) from %s to object %s", |
| 368 | member, interface, msg.sender(), objpath); |
| 369 | |
| 370 | InterfaceProxy *ii = find_interface(interface); |
| 371 | if (ii) |
| 372 | { |
| 373 | return ii->dispatch_signal(smsg); |
| 374 | } |
| 375 | else |
| 376 | { |
| 377 | return false; |
| 378 | } |
| 379 | } |
| 380 | default: |
| 381 | { |
| 382 | return false; |
| 383 | } |
| 384 | } |
| 385 | } |