Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 5 | #include "content/child/npapi/npobject_proxy.h" |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 6 | |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 7 | #include "content/child/npapi/np_channel_base.h" |
| 8 | #include "content/child/npapi/npobject_util.h" |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 9 | #include "content/child/plugin_messages.h" |
Torne (Richard Coles) | 7d4cd47 | 2013-06-19 11:58:07 +0100 | [diff] [blame] | 10 | #include "third_party/WebKit/public/web/WebBindings.h" |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 11 | |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 12 | #if defined(ENABLE_PLUGINS) |
| 13 | #include "content/child/npapi/plugin_instance.h" |
| 14 | #endif |
| 15 | |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 16 | using WebKit::WebBindings; |
| 17 | |
| 18 | namespace content { |
| 19 | |
| 20 | struct NPObjectWrapper { |
| 21 | NPObject object; |
| 22 | NPObjectProxy* proxy; |
| 23 | }; |
| 24 | |
| 25 | NPClass NPObjectProxy::npclass_proxy_ = { |
| 26 | NP_CLASS_STRUCT_VERSION, |
| 27 | NPObjectProxy::NPAllocate, |
| 28 | NPObjectProxy::NPDeallocate, |
| 29 | NPObjectProxy::NPPInvalidate, |
| 30 | NPObjectProxy::NPHasMethod, |
| 31 | NPObjectProxy::NPInvoke, |
| 32 | NPObjectProxy::NPInvokeDefault, |
| 33 | NPObjectProxy::NPHasProperty, |
| 34 | NPObjectProxy::NPGetProperty, |
| 35 | NPObjectProxy::NPSetProperty, |
| 36 | NPObjectProxy::NPRemoveProperty, |
| 37 | NPObjectProxy::NPNEnumerate, |
| 38 | NPObjectProxy::NPNConstruct |
| 39 | }; |
| 40 | |
| 41 | NPObjectProxy* NPObjectProxy::GetProxy(NPObject* object) { |
| 42 | NPObjectProxy* proxy = NULL; |
| 43 | |
| 44 | // Wrapper exists only for NPObjects that we had created. |
| 45 | if (&npclass_proxy_ == object->_class) { |
| 46 | NPObjectWrapper* wrapper = reinterpret_cast<NPObjectWrapper*>(object); |
| 47 | proxy = wrapper->proxy; |
| 48 | } |
| 49 | |
| 50 | return proxy; |
| 51 | } |
| 52 | |
| 53 | NPObject* NPObjectProxy::GetUnderlyingNPObject() { |
| 54 | return NULL; |
| 55 | } |
| 56 | |
| 57 | IPC::Listener* NPObjectProxy::GetChannelListener() { |
| 58 | return static_cast<IPC::Listener*>(this); |
| 59 | } |
| 60 | |
| 61 | NPObjectProxy::NPObjectProxy( |
| 62 | NPChannelBase* channel, |
| 63 | int route_id, |
| 64 | int render_view_id, |
| 65 | const GURL& page_url) |
| 66 | : channel_(channel), |
| 67 | route_id_(route_id), |
| 68 | render_view_id_(render_view_id), |
| 69 | page_url_(page_url) { |
| 70 | channel_->AddRoute(route_id, this, this); |
| 71 | } |
| 72 | |
| 73 | NPObjectProxy::~NPObjectProxy() { |
| 74 | if (channel_.get()) { |
| 75 | // This NPObjectProxy instance is now invalid and should not be reused for |
| 76 | // requests initiated by plugins. We may receive requests for the |
| 77 | // same NPObject in the context of the outgoing NPObjectMsg_Release call. |
| 78 | // We should be creating new NPObjectProxy instances to wrap these |
| 79 | // NPObjects. |
| 80 | channel_->RemoveMappingForNPObjectProxy(route_id_); |
| 81 | channel_->RemoveRoute(route_id_); |
| 82 | Send(new NPObjectMsg_Release(route_id_)); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | NPObject* NPObjectProxy::Create(NPChannelBase* channel, |
| 87 | int route_id, |
| 88 | int render_view_id, |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 89 | const GURL& page_url, |
| 90 | NPP owner) { |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 91 | NPObjectWrapper* obj = reinterpret_cast<NPObjectWrapper*>( |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 92 | WebBindings::createObject(owner, &npclass_proxy_)); |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 93 | obj->proxy = new NPObjectProxy(channel, route_id, render_view_id, page_url); |
| 94 | channel->AddMappingForNPObjectProxy(route_id, &obj->object); |
| 95 | return reinterpret_cast<NPObject*>(obj); |
| 96 | } |
| 97 | |
| 98 | bool NPObjectProxy::Send(IPC::Message* msg) { |
| 99 | if (channel_.get()) |
| 100 | return channel_->Send(msg); |
| 101 | |
| 102 | delete msg; |
| 103 | return false; |
| 104 | } |
| 105 | |
| 106 | NPObject* NPObjectProxy::NPAllocate(NPP, NPClass*) { |
| 107 | return reinterpret_cast<NPObject*>(new NPObjectWrapper); |
| 108 | } |
| 109 | |
| 110 | void NPObjectProxy::NPDeallocate(NPObject* npObj) { |
| 111 | NPObjectWrapper* obj = reinterpret_cast<NPObjectWrapper*>(npObj); |
| 112 | delete obj->proxy; |
| 113 | delete obj; |
| 114 | } |
| 115 | |
| 116 | bool NPObjectProxy::OnMessageReceived(const IPC::Message& msg) { |
| 117 | NOTREACHED(); |
| 118 | return false; |
| 119 | } |
| 120 | |
| 121 | void NPObjectProxy::OnChannelError() { |
| 122 | // Release our ref count of the plugin channel object, as it addrefs the |
| 123 | // process. |
| 124 | channel_ = NULL; |
| 125 | } |
| 126 | |
| 127 | bool NPObjectProxy::NPHasMethod(NPObject *obj, |
| 128 | NPIdentifier name) { |
| 129 | if (obj == NULL) |
| 130 | return false; |
| 131 | |
| 132 | bool result = false; |
| 133 | NPObjectProxy* proxy = GetProxy(obj); |
| 134 | |
| 135 | if (!proxy) { |
| 136 | return obj->_class->hasMethod(obj, name); |
| 137 | } |
| 138 | |
| 139 | NPIdentifier_Param name_param; |
| 140 | CreateNPIdentifierParam(name, &name_param); |
| 141 | |
| 142 | proxy->Send(new NPObjectMsg_HasMethod(proxy->route_id(), name_param, |
| 143 | &result)); |
| 144 | return result; |
| 145 | } |
| 146 | |
| 147 | bool NPObjectProxy::NPInvoke(NPObject *obj, |
| 148 | NPIdentifier name, |
| 149 | const NPVariant *args, |
| 150 | uint32_t arg_count, |
| 151 | NPVariant *result) { |
| 152 | return NPInvokePrivate(0, obj, false, name, args, arg_count, result); |
| 153 | } |
| 154 | |
| 155 | bool NPObjectProxy::NPInvokeDefault(NPObject *npobj, |
| 156 | const NPVariant *args, |
| 157 | uint32_t arg_count, |
| 158 | NPVariant *result) { |
| 159 | return NPInvokePrivate(0, npobj, true, 0, args, arg_count, result); |
| 160 | } |
| 161 | |
| 162 | bool NPObjectProxy::NPInvokePrivate(NPP npp, |
| 163 | NPObject *obj, |
| 164 | bool is_default, |
| 165 | NPIdentifier name, |
| 166 | const NPVariant *args, |
| 167 | uint32_t arg_count, |
| 168 | NPVariant *np_result) { |
| 169 | if (obj == NULL) |
| 170 | return false; |
| 171 | |
| 172 | NPObjectProxy* proxy = GetProxy(obj); |
| 173 | if (!proxy) { |
| 174 | if (is_default) { |
| 175 | return obj->_class->invokeDefault(obj, args, arg_count, np_result); |
| 176 | } else { |
| 177 | return obj->_class->invoke(obj, name, args, arg_count, np_result); |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | bool result = false; |
| 182 | int render_view_id = proxy->render_view_id_; |
| 183 | NPIdentifier_Param name_param; |
| 184 | if (is_default) { |
| 185 | // The data won't actually get used, but set it so we don't send random |
| 186 | // data. |
| 187 | name_param.identifier = NULL; |
| 188 | } else { |
| 189 | CreateNPIdentifierParam(name, &name_param); |
| 190 | } |
| 191 | |
| 192 | // Note: This instance can get destroyed in the context of |
| 193 | // Send so addref the channel in this scope. |
| 194 | scoped_refptr<NPChannelBase> channel_copy = proxy->channel_; |
| 195 | std::vector<NPVariant_Param> args_param; |
| 196 | for (unsigned int i = 0; i < arg_count; ++i) { |
| 197 | NPVariant_Param param; |
| 198 | CreateNPVariantParam(args[i], |
| 199 | channel_copy.get(), |
| 200 | ¶m, |
| 201 | false, |
| 202 | render_view_id, |
| 203 | proxy->page_url_); |
| 204 | args_param.push_back(param); |
| 205 | } |
| 206 | |
| 207 | NPVariant_Param param_result; |
| 208 | NPObjectMsg_Invoke* msg = new NPObjectMsg_Invoke( |
| 209 | proxy->route_id_, is_default, name_param, args_param, ¶m_result, |
| 210 | &result); |
| 211 | |
| 212 | // If we're in the plugin process and this invoke leads to a dialog box, the |
| 213 | // plugin will hang the window hierarchy unless we pump the window message |
| 214 | // queue while waiting for a reply. We need to do this to simulate what |
| 215 | // happens when everything runs in-process (while calling MessageBox window |
| 216 | // messages are pumped). |
| 217 | if (IsPluginProcess() && proxy->channel()) { |
| 218 | msg->set_pump_messages_event( |
| 219 | proxy->channel()->GetModalDialogEvent(render_view_id)); |
| 220 | } |
| 221 | |
| 222 | GURL page_url = proxy->page_url_; |
| 223 | proxy->Send(msg); |
| 224 | |
| 225 | // Send may delete proxy. |
| 226 | proxy = NULL; |
| 227 | |
| 228 | if (!result) |
| 229 | return false; |
| 230 | |
| 231 | CreateNPVariant( |
| 232 | param_result, channel_copy.get(), np_result, render_view_id, page_url); |
| 233 | return true; |
| 234 | } |
| 235 | |
| 236 | bool NPObjectProxy::NPHasProperty(NPObject *obj, |
| 237 | NPIdentifier name) { |
| 238 | if (obj == NULL) |
| 239 | return false; |
| 240 | |
| 241 | bool result = false; |
| 242 | NPObjectProxy* proxy = GetProxy(obj); |
| 243 | if (!proxy) { |
| 244 | return obj->_class->hasProperty(obj, name); |
| 245 | } |
| 246 | |
| 247 | NPIdentifier_Param name_param; |
| 248 | CreateNPIdentifierParam(name, &name_param); |
| 249 | |
| 250 | NPVariant_Param param; |
| 251 | proxy->Send(new NPObjectMsg_HasProperty( |
| 252 | proxy->route_id(), name_param, &result)); |
| 253 | |
| 254 | // Send may delete proxy. |
| 255 | proxy = NULL; |
| 256 | |
| 257 | return result; |
| 258 | } |
| 259 | |
| 260 | bool NPObjectProxy::NPGetProperty(NPObject *obj, |
| 261 | NPIdentifier name, |
| 262 | NPVariant *np_result) { |
| 263 | // Please refer to http://code.google.com/p/chromium/issues/detail?id=2556, |
| 264 | // which was a crash in the XStandard plugin during plugin shutdown. The |
| 265 | // crash occured because the plugin requests the plugin script object, |
| 266 | // which fails. The plugin does not check the result of the operation and |
| 267 | // invokes NPN_GetProperty on a NULL object which lead to the crash. If |
| 268 | // we observe similar crashes in other methods in the future, these null |
| 269 | // checks may have to be replicated in the other methods in this class. |
| 270 | if (obj == NULL) |
| 271 | return false; |
| 272 | |
| 273 | NPObjectProxy* proxy = GetProxy(obj); |
| 274 | if (!proxy) { |
| 275 | return obj->_class->getProperty(obj, name, np_result); |
| 276 | } |
| 277 | |
| 278 | bool result = false; |
| 279 | int render_view_id = proxy->render_view_id_; |
| 280 | NPIdentifier_Param name_param; |
| 281 | CreateNPIdentifierParam(name, &name_param); |
| 282 | |
| 283 | NPVariant_Param param; |
| 284 | scoped_refptr<NPChannelBase> channel(proxy->channel_); |
| 285 | |
| 286 | GURL page_url = proxy->page_url_; |
| 287 | proxy->Send(new NPObjectMsg_GetProperty( |
| 288 | proxy->route_id(), name_param, ¶m, &result)); |
| 289 | // Send may delete proxy. |
| 290 | proxy = NULL; |
| 291 | if (!result) |
| 292 | return false; |
| 293 | |
| 294 | CreateNPVariant( |
| 295 | param, channel.get(), np_result, render_view_id, page_url); |
| 296 | |
| 297 | return true; |
| 298 | } |
| 299 | |
| 300 | bool NPObjectProxy::NPSetProperty(NPObject *obj, |
| 301 | NPIdentifier name, |
| 302 | const NPVariant *value) { |
| 303 | if (obj == NULL) |
| 304 | return false; |
| 305 | |
| 306 | NPObjectProxy* proxy = GetProxy(obj); |
| 307 | if (!proxy) { |
| 308 | return obj->_class->setProperty(obj, name, value); |
| 309 | } |
| 310 | |
| 311 | bool result = false; |
| 312 | int render_view_id = proxy->render_view_id_; |
| 313 | NPIdentifier_Param name_param; |
| 314 | CreateNPIdentifierParam(name, &name_param); |
| 315 | |
| 316 | NPVariant_Param value_param; |
| 317 | CreateNPVariantParam( |
| 318 | *value, proxy->channel(), &value_param, false, render_view_id, |
| 319 | proxy->page_url_); |
| 320 | |
| 321 | proxy->Send(new NPObjectMsg_SetProperty( |
| 322 | proxy->route_id(), name_param, value_param, &result)); |
| 323 | // Send may delete proxy. |
| 324 | proxy = NULL; |
| 325 | |
| 326 | return result; |
| 327 | } |
| 328 | |
| 329 | bool NPObjectProxy::NPRemoveProperty(NPObject *obj, |
| 330 | NPIdentifier name) { |
| 331 | if (obj == NULL) |
| 332 | return false; |
| 333 | |
| 334 | bool result = false; |
| 335 | NPObjectProxy* proxy = GetProxy(obj); |
| 336 | if (!proxy) { |
| 337 | return obj->_class->removeProperty(obj, name); |
| 338 | } |
| 339 | |
| 340 | NPIdentifier_Param name_param; |
| 341 | CreateNPIdentifierParam(name, &name_param); |
| 342 | |
| 343 | NPVariant_Param param; |
| 344 | proxy->Send(new NPObjectMsg_RemoveProperty( |
| 345 | proxy->route_id(), name_param, &result)); |
| 346 | // Send may delete proxy. |
| 347 | proxy = NULL; |
| 348 | |
| 349 | return result; |
| 350 | } |
| 351 | |
| 352 | void NPObjectProxy::NPPInvalidate(NPObject *obj) { |
| 353 | if (obj == NULL) |
| 354 | return; |
| 355 | |
| 356 | NPObjectProxy* proxy = GetProxy(obj); |
| 357 | if (!proxy) { |
| 358 | obj->_class->invalidate(obj); |
| 359 | return; |
| 360 | } |
| 361 | |
| 362 | proxy->Send(new NPObjectMsg_Invalidate(proxy->route_id())); |
| 363 | // Send may delete proxy. |
| 364 | proxy = NULL; |
| 365 | } |
| 366 | |
| 367 | bool NPObjectProxy::NPNEnumerate(NPObject *obj, |
| 368 | NPIdentifier **value, |
| 369 | uint32_t *count) { |
| 370 | if (obj == NULL) |
| 371 | return false; |
| 372 | |
| 373 | bool result = false; |
| 374 | NPObjectProxy* proxy = GetProxy(obj); |
| 375 | if (!proxy) { |
| 376 | if (obj->_class->structVersion >= NP_CLASS_STRUCT_VERSION_ENUM) { |
| 377 | return obj->_class->enumerate(obj, value, count); |
| 378 | } else { |
| 379 | return false; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | std::vector<NPIdentifier_Param> value_param; |
| 384 | proxy->Send(new NPObjectMsg_Enumeration( |
| 385 | proxy->route_id(), &value_param, &result)); |
| 386 | // Send may delete proxy. |
| 387 | proxy = NULL; |
| 388 | |
| 389 | if (!result) |
| 390 | return false; |
| 391 | |
| 392 | *count = static_cast<unsigned int>(value_param.size()); |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 393 | *value = static_cast<NPIdentifier *>(malloc(sizeof(NPIdentifier) * *count)); |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 394 | for (unsigned int i = 0; i < *count; ++i) |
| 395 | (*value)[i] = CreateNPIdentifier(value_param[i]); |
| 396 | |
| 397 | return true; |
| 398 | } |
| 399 | |
| 400 | bool NPObjectProxy::NPNConstruct(NPObject *obj, |
| 401 | const NPVariant *args, |
| 402 | uint32_t arg_count, |
| 403 | NPVariant *np_result) { |
| 404 | if (obj == NULL) |
| 405 | return false; |
| 406 | |
| 407 | NPObjectProxy* proxy = GetProxy(obj); |
| 408 | if (!proxy) { |
| 409 | if (obj->_class->structVersion >= NP_CLASS_STRUCT_VERSION_CTOR) { |
| 410 | return obj->_class->construct(obj, args, arg_count, np_result); |
| 411 | } else { |
| 412 | return false; |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | bool result = false; |
| 417 | int render_view_id = proxy->render_view_id_; |
| 418 | |
| 419 | // Note: This instance can get destroyed in the context of |
| 420 | // Send so addref the channel in this scope. |
| 421 | scoped_refptr<NPChannelBase> channel_copy = proxy->channel_; |
| 422 | std::vector<NPVariant_Param> args_param; |
| 423 | for (unsigned int i = 0; i < arg_count; ++i) { |
| 424 | NPVariant_Param param; |
| 425 | CreateNPVariantParam(args[i], |
| 426 | channel_copy.get(), |
| 427 | ¶m, |
| 428 | false, |
| 429 | render_view_id, |
| 430 | proxy->page_url_); |
| 431 | args_param.push_back(param); |
| 432 | } |
| 433 | |
| 434 | NPVariant_Param param_result; |
| 435 | NPObjectMsg_Construct* msg = new NPObjectMsg_Construct( |
| 436 | proxy->route_id_, args_param, ¶m_result, &result); |
| 437 | |
| 438 | // See comment in NPObjectProxy::NPInvokePrivate. |
| 439 | if (IsPluginProcess() && proxy->channel()) { |
| 440 | msg->set_pump_messages_event( |
| 441 | proxy->channel()->GetModalDialogEvent(proxy->render_view_id_)); |
| 442 | } |
| 443 | |
| 444 | GURL page_url = proxy->page_url_; |
| 445 | proxy->Send(msg); |
| 446 | |
| 447 | // Send may delete proxy. |
| 448 | proxy = NULL; |
| 449 | |
| 450 | if (!result) |
| 451 | return false; |
| 452 | |
| 453 | CreateNPVariant( |
| 454 | param_result, channel_copy.get(), np_result, render_view_id, page_url); |
| 455 | return true; |
| 456 | } |
| 457 | |
| 458 | bool NPObjectProxy::NPNEvaluate(NPP npp, |
| 459 | NPObject *obj, |
| 460 | NPString *script, |
| 461 | NPVariant *result_var) { |
| 462 | NPObjectProxy* proxy = GetProxy(obj); |
| 463 | if (!proxy) { |
| 464 | return false; |
| 465 | } |
| 466 | |
| 467 | bool result = false; |
| 468 | int render_view_id = proxy->render_view_id_; |
| 469 | bool popups_allowed = false; |
| 470 | |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 471 | #if defined(ENABLE_PLUGINS) |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 472 | if (npp) { |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 473 | PluginInstance* plugin_instance = |
| 474 | reinterpret_cast<PluginInstance*>(npp->ndata); |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 475 | if (plugin_instance) |
| 476 | popups_allowed = plugin_instance->popups_allowed(); |
| 477 | } |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 478 | #endif |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 479 | |
| 480 | NPVariant_Param result_param; |
| 481 | std::string script_str = std::string( |
| 482 | script->UTF8Characters, script->UTF8Length); |
| 483 | |
| 484 | NPObjectMsg_Evaluate* msg = new NPObjectMsg_Evaluate(proxy->route_id(), |
| 485 | script_str, |
| 486 | popups_allowed, |
| 487 | &result_param, |
| 488 | &result); |
| 489 | |
| 490 | // See comment in NPObjectProxy::NPInvokePrivate. |
| 491 | if (IsPluginProcess() && proxy->channel()) { |
| 492 | msg->set_pump_messages_event( |
| 493 | proxy->channel()->GetModalDialogEvent(render_view_id)); |
| 494 | } |
| 495 | scoped_refptr<NPChannelBase> channel(proxy->channel_); |
| 496 | |
| 497 | GURL page_url = proxy->page_url_; |
| 498 | proxy->Send(msg); |
| 499 | // Send may delete proxy. |
| 500 | proxy = NULL; |
| 501 | if (!result) |
| 502 | return false; |
| 503 | |
| 504 | CreateNPVariant( |
| 505 | result_param, channel.get(), result_var, render_view_id, page_url); |
| 506 | return true; |
| 507 | } |
| 508 | |
| 509 | } // namespace content |