| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chromeos/dbus/permission_broker_client.h" |
| |
| #include <stdint.h> |
| #include <utility> |
| |
| #include "base/bind.h" |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "dbus/bus.h" |
| #include "dbus/message.h" |
| #include "dbus/object_proxy.h" |
| #include "third_party/cros_system_api/dbus/service_constants.h" |
| |
| using permission_broker::kCheckPathAccess; |
| using permission_broker::kOpenPath; |
| using permission_broker::kPermissionBrokerInterface; |
| using permission_broker::kPermissionBrokerServiceName; |
| using permission_broker::kPermissionBrokerServicePath; |
| using permission_broker::kReleaseTcpPort; |
| using permission_broker::kReleaseUdpPort; |
| using permission_broker::kRequestTcpPortAccess; |
| using permission_broker::kRequestUdpPortAccess; |
| |
| namespace chromeos { |
| |
| namespace { |
| const char kNoResponseError[] = "org.chromium.Error.NoResponse"; |
| } |
| |
| class PermissionBrokerClientImpl : public PermissionBrokerClient { |
| public: |
| PermissionBrokerClientImpl() : proxy_(NULL), weak_ptr_factory_(this) {} |
| |
| void CheckPathAccess(const std::string& path, |
| const ResultCallback& callback) override { |
| dbus::MethodCall method_call(kPermissionBrokerInterface, kCheckPathAccess); |
| dbus::MessageWriter writer(&method_call); |
| writer.AppendString(path); |
| proxy_->CallMethod( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| base::BindOnce(&PermissionBrokerClientImpl::OnResponse, |
| weak_ptr_factory_.GetWeakPtr(), callback)); |
| } |
| |
| void OpenPath(const std::string& path, |
| const OpenPathCallback& callback, |
| const ErrorCallback& error_callback) override { |
| dbus::MethodCall method_call(kPermissionBrokerInterface, kOpenPath); |
| dbus::MessageWriter writer(&method_call); |
| writer.AppendString(path); |
| proxy_->CallMethodWithErrorCallback( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| base::BindOnce(&PermissionBrokerClientImpl::OnOpenPathResponse, |
| weak_ptr_factory_.GetWeakPtr(), callback), |
| base::BindOnce(&PermissionBrokerClientImpl::OnError, |
| weak_ptr_factory_.GetWeakPtr(), error_callback)); |
| } |
| |
| void RequestTcpPortAccess(uint16_t port, |
| const std::string& interface, |
| int lifeline_fd, |
| const ResultCallback& callback) override { |
| dbus::MethodCall method_call(kPermissionBrokerInterface, |
| kRequestTcpPortAccess); |
| dbus::MessageWriter writer(&method_call); |
| writer.AppendUint16(port); |
| writer.AppendString(interface); |
| writer.AppendFileDescriptor(lifeline_fd); |
| proxy_->CallMethod( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| base::BindOnce(&PermissionBrokerClientImpl::OnResponse, |
| weak_ptr_factory_.GetWeakPtr(), callback)); |
| } |
| |
| void RequestUdpPortAccess(uint16_t port, |
| const std::string& interface, |
| int lifeline_fd, |
| const ResultCallback& callback) override { |
| dbus::MethodCall method_call(kPermissionBrokerInterface, |
| kRequestUdpPortAccess); |
| dbus::MessageWriter writer(&method_call); |
| writer.AppendUint16(port); |
| writer.AppendString(interface); |
| writer.AppendFileDescriptor(lifeline_fd); |
| proxy_->CallMethod( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| base::BindOnce(&PermissionBrokerClientImpl::OnResponse, |
| weak_ptr_factory_.GetWeakPtr(), callback)); |
| } |
| |
| void ReleaseTcpPort(uint16_t port, |
| const std::string& interface, |
| const ResultCallback& callback) override { |
| dbus::MethodCall method_call(kPermissionBrokerInterface, kReleaseTcpPort); |
| dbus::MessageWriter writer(&method_call); |
| writer.AppendUint16(port); |
| writer.AppendString(interface); |
| proxy_->CallMethod(&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| base::Bind(&PermissionBrokerClientImpl::OnResponse, |
| weak_ptr_factory_.GetWeakPtr(), callback)); |
| } |
| |
| void ReleaseUdpPort(uint16_t port, |
| const std::string& interface, |
| const ResultCallback& callback) override { |
| dbus::MethodCall method_call(kPermissionBrokerInterface, kReleaseUdpPort); |
| dbus::MessageWriter writer(&method_call); |
| writer.AppendUint16(port); |
| writer.AppendString(interface); |
| proxy_->CallMethod( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| base::BindOnce(&PermissionBrokerClientImpl::OnResponse, |
| weak_ptr_factory_.GetWeakPtr(), callback)); |
| } |
| |
| protected: |
| void Init(dbus::Bus* bus) override { |
| proxy_ = |
| bus->GetObjectProxy(kPermissionBrokerServiceName, |
| dbus::ObjectPath(kPermissionBrokerServicePath)); |
| } |
| |
| private: |
| // Handle a DBus response from the permission broker, invoking the callback |
| // that the method was originally called with with the success response. |
| void OnResponse(const ResultCallback& callback, dbus::Response* response) { |
| if (!response) { |
| LOG(WARNING) << "Access request method call failed."; |
| callback.Run(false); |
| return; |
| } |
| |
| bool result = false; |
| dbus::MessageReader reader(response); |
| if (!reader.PopBool(&result)) |
| LOG(WARNING) << "Could not parse response: " << response->ToString(); |
| callback.Run(result); |
| } |
| |
| void OnOpenPathResponse(const OpenPathCallback& callback, |
| dbus::Response* response) { |
| base::ScopedFD fd; |
| dbus::MessageReader reader(response); |
| if (!reader.PopFileDescriptor(&fd)) |
| LOG(WARNING) << "Could not parse response: " << response->ToString(); |
| callback.Run(std::move(fd)); |
| } |
| |
| void OnError(const ErrorCallback& callback, dbus::ErrorResponse* response) { |
| std::string error_name; |
| std::string error_message; |
| if (response) { |
| dbus::MessageReader reader(response); |
| error_name = response->GetErrorName(); |
| reader.PopString(&error_message); |
| } else { |
| error_name = kNoResponseError; |
| } |
| callback.Run(error_name, error_message); |
| } |
| |
| dbus::ObjectProxy* proxy_; |
| |
| // Note: This should remain the last member so that it will be destroyed |
| // first, invalidating its weak pointers, before the other members are |
| // destroyed. |
| base::WeakPtrFactory<PermissionBrokerClientImpl> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PermissionBrokerClientImpl); |
| }; |
| |
| PermissionBrokerClient::PermissionBrokerClient() = default; |
| |
| PermissionBrokerClient::~PermissionBrokerClient() = default; |
| |
| PermissionBrokerClient* PermissionBrokerClient::Create() { |
| return new PermissionBrokerClientImpl(); |
| } |
| |
| } // namespace chromeos |