| // Copyright 2021 The Chromium OS 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 <utility> |
| |
| #include <base/containers/contains.h> |
| |
| #include "hermes/modem_manager_proxy.h" |
| |
| namespace hermes { |
| |
| ModemManagerProxy::ModemManagerProxy(const scoped_refptr<dbus::Bus>& bus) |
| : bus_(bus), |
| object_manager_proxy_( |
| std::make_unique<org::freedesktop::DBus::ObjectManagerProxy>( |
| bus, |
| modemmanager::kModemManager1ServiceName, |
| dbus::ObjectPath(modemmanager::kModemManager1ServicePath))), |
| mm_proxy_(std::make_unique<org::freedesktop::ModemManager1Proxy>( |
| bus, modemmanager::kModemManager1ServiceName)), |
| weak_factory_(this) { |
| auto on_interface_added = base::BindRepeating( |
| &ModemManagerProxy::OnInterfaceAdded, weak_factory_.GetWeakPtr()); |
| auto on_dbus_signal_connected = |
| base::BindOnce([](const std::string& interface, const std::string& signal, |
| bool success) { |
| if (!success) |
| LOG(ERROR) << "Failed to connect to signal " << interface << "." |
| << signal; |
| }); |
| object_manager_proxy_->RegisterInterfacesAddedSignalHandler( |
| std::move(on_interface_added), std::move(on_dbus_signal_connected)); |
| } |
| |
| ModemManagerProxy::ModemManagerProxy() : weak_factory_(this) {} |
| |
| void ModemManagerProxy::RegisterModemAppearedCallback(base::OnceClosure cb) { |
| VLOG(2) << __func__; |
| on_modem_appeared_cb_ = std::move(cb); |
| } |
| |
| void ModemManagerProxy::WaitForModem(base::OnceClosure cb) { |
| VLOG(2) << __func__; |
| auto on_service_available = |
| base::BindOnce(&ModemManagerProxy::WaitForModemStepGetObjects, |
| weak_factory_.GetWeakPtr(), std::move(cb)); |
| object_manager_proxy_->GetObjectProxy()->WaitForServiceToBeAvailable( |
| std::move((on_service_available))); |
| } |
| |
| void ModemManagerProxy::WaitForModemStepGetObjects(base::OnceClosure cb, bool) { |
| VLOG(2) << __func__; |
| auto error_cb = base::BindOnce([](brillo::Error* err) { |
| LOG(ERROR) << "Could not get MM managed objects: " << err->GetDomain() |
| << ": " << err->GetCode() << ": " << err->GetMessage(); |
| }); |
| object_manager_proxy_->GetManagedObjectsAsync( |
| base::BindOnce(&ModemManagerProxy::WaitForModemStepLast, |
| weak_factory_.GetWeakPtr(), std::move(cb)), |
| std::move(error_cb)); |
| } |
| |
| void ModemManagerProxy::WaitForModemStepLast( |
| base::OnceClosure cb, |
| const DBusObjectsWithProperties& dbus_objects_with_properties) { |
| VLOG(2) << __func__; |
| for (const auto& object_properties_pair : dbus_objects_with_properties) { |
| VLOG(2) << __func__ << ": " << object_properties_pair.first.value(); |
| if (!base::Contains(object_properties_pair.second, |
| modemmanager::kModemManager1ModemInterface)) { |
| continue; |
| } |
| LOG(INFO) << __func__ << ": Found " << object_properties_pair.first.value(); |
| RegisterModemAppearedCallback(std::move(cb)); |
| OnNewModemDetected(dbus::ObjectPath{object_properties_pair.first.value()}); |
| return; |
| } |
| LOG(INFO) << __func__ << ": Waiting for modem..."; |
| RegisterModemAppearedCallback(std::move(cb)); |
| } |
| |
| void ModemManagerProxy::OnInterfaceAdded( |
| const dbus::ObjectPath& object_path, |
| const DBusInterfaceToProperties& properties) { |
| brillo::ErrorPtr error; |
| VLOG(2) << __func__ << ": " << object_path.value(); |
| if (!base::Contains(properties, modemmanager::kModemManager1ModemInterface)) { |
| VLOG(2) << __func__ << "Interfaces added, but not modem interface."; |
| return; |
| } |
| OnNewModemDetected(object_path); |
| } |
| |
| void ModemManagerProxy::OnNewModemDetected(dbus::ObjectPath object_path) { |
| LOG(INFO) << __func__ << ": New modem detected at " << object_path.value(); |
| modem_proxy_ = std::make_unique<org::freedesktop::ModemManager1::ModemProxy>( |
| bus_, modemmanager::kModemManager1ServiceName, object_path); |
| modem_proxy_->InitializeProperties(base::BindRepeating( |
| &ModemManagerProxy::OnPropertiesChanged, weak_factory_.GetWeakPtr())); |
| } |
| |
| void ModemManagerProxy::OnPropertiesChanged( |
| org::freedesktop::ModemManager1::ModemProxyInterface* /*unused*/, |
| const std::string& prop) { |
| VLOG(3) << __func__ << " : " << prop << " changed."; |
| if (!modem_proxy_->GetProperties()->primary_port.is_valid() || |
| !modem_proxy_->GetProperties()->device_identifier.is_valid()) |
| return; |
| if (!on_modem_appeared_cb_.is_null()) |
| std::move(on_modem_appeared_cb_).Run(); |
| } |
| |
| std::string ModemManagerProxy::GetPrimaryPort() const { |
| return modem_proxy_->primary_port(); |
| } |
| |
| void ModemManagerProxy::Uninhibit() { |
| uninhibit_cb_.Cancel(); |
| if (inhibited_uid_.has_value()) { |
| InhibitDevice(false, base::BindOnce([](int err) { |
| VLOG(2) << "Uninhibit completed with err: " << err; |
| })); |
| } |
| } |
| |
| void ModemManagerProxy::ScheduleUninhibit(base::TimeDelta timeout) { |
| LOG(INFO) << "Uninhibiting in " << timeout.InSeconds() << " seconds."; |
| uninhibit_cb_.Cancel(); |
| |
| uninhibit_cb_.Reset(base::BindOnce(&ModemManagerProxy::Uninhibit, |
| weak_factory_.GetWeakPtr())); |
| base::SequencedTaskRunnerHandle::Get()->PostDelayedTask( |
| FROM_HERE, uninhibit_cb_.callback(), timeout); |
| } |
| |
| void ModemManagerProxy::WaitForModemAndInhibit(ResultCallback cb) { |
| // wait for modem if another daemon has inhibited MM. If Hermes has inhibited |
| // MM, then we needn't wait for the modem. |
| if (inhibited_uid_.has_value()) { |
| LOG(INFO) << inhibited_uid_.value() << " is already inhibited."; |
| OnInhibitSuccess(/*inhibit*/ true, inhibited_uid_.value(), std::move(cb)); |
| return; |
| } |
| WaitForModem(base::BindOnce(&ModemManagerProxy::InhibitDevice, |
| weak_factory_.GetWeakPtr(), true, std::move(cb))); |
| } |
| |
| void ModemManagerProxy::InhibitDevice(bool inhibit, ResultCallback cb) { |
| LOG(INFO) << __func__ << ": inhibit = " << inhibit; |
| if (!inhibit && !inhibited_uid_.has_value()) { |
| LOG(ERROR) << "No inhibited device found."; |
| std::move(cb).Run(kModemManagerError); |
| return; |
| } |
| |
| if (inhibit && (!modem_proxy_ || modem_proxy_->device().empty())) { |
| LOG(ERROR) << __func__ << ": Device identifier unavailable."; |
| std::move(cb).Run(kModemManagerError); |
| return; |
| } |
| |
| auto uid = inhibit ? modem_proxy_->device() : inhibited_uid_.value(); |
| |
| constexpr int kInhibitTimeoutMilliseconds = 1000; |
| // convert cb into a repeating callback, so that it can be used by either |
| // on_inhibit_success or on_inhibit_fail |
| auto return_inhibit_result = base::BindRepeating( |
| [](ResultCallback cb, int err) { std::move(cb).Run(err); }, |
| base::Passed(std::move(cb))); |
| |
| auto on_inhibit_success = base::BindOnce(&ModemManagerProxy::OnInhibitSuccess, |
| weak_factory_.GetWeakPtr(), inhibit, |
| uid, return_inhibit_result); |
| auto on_inhibit_fail = base::BindOnce( |
| [](ResultCallback cb, brillo::Error* error) { |
| LOG(ERROR) << error->GetMessage(); |
| std::move(cb).Run(kModemManagerError); |
| }, |
| return_inhibit_result); |
| |
| mm_proxy_->InhibitDeviceAsync(uid, inhibit, std::move(on_inhibit_success), |
| std::move(on_inhibit_fail), |
| kInhibitTimeoutMilliseconds); |
| } |
| |
| void ModemManagerProxy::OnInhibitSuccess(bool inhibit, |
| std::basic_string<char> uid, |
| ResultCallback cb) { |
| VLOG(2) << __func__; |
| inhibited_uid_ = |
| inhibit ? std::optional<std::basic_string<char>>{uid} : std::nullopt; |
| |
| // uninhibit automatically if we exceed the max duration allowed for a |
| // Hermes operation. |
| uninhibit_cb_.Cancel(); |
| if (inhibit) { |
| ScheduleUninhibit(kHermesTimeout); |
| std::move(cb).Run(kSuccess); |
| return; |
| } |
| |
| std::move(cb).Run(kSuccess); |
| } |
| |
| } // namespace hermes |