| // Copyright 2014 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 "device/hid/hid_service_win.h" |
| |
| #include <memory> |
| |
| #define INITGUID |
| |
| #include <dbt.h> |
| #include <setupapi.h> |
| #include <stddef.h> |
| #include <winioctl.h> |
| |
| #include <utility> |
| |
| #include "base/bind.h" |
| #include "base/files/file.h" |
| #include "base/location.h" |
| #include "base/memory/free_deleter.h" |
| #include "base/sequenced_task_runner.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/sys_string_conversions.h" |
| #include "base/task_scheduler/post_task.h" |
| #include "base/threading/sequenced_task_runner_handle.h" |
| #include "components/device_event_log/device_event_log.h" |
| #include "device/hid/hid_connection_win.h" |
| #include "device/hid/hid_device_info.h" |
| #include "net/base/io_buffer.h" |
| |
| namespace device { |
| |
| HidServiceWin::HidServiceWin() |
| : task_runner_(base::SequencedTaskRunnerHandle::Get()), |
| blocking_task_runner_( |
| base::CreateSequencedTaskRunnerWithTraits(kBlockingTaskTraits)), |
| device_observer_(this), |
| weak_factory_(this) { |
| DeviceMonitorWin* device_monitor = |
| DeviceMonitorWin::GetForDeviceInterface(GUID_DEVINTERFACE_HID); |
| if (device_monitor) |
| device_observer_.Add(device_monitor); |
| |
| blocking_task_runner_->PostTask( |
| FROM_HERE, base::Bind(&HidServiceWin::EnumerateBlocking, |
| weak_factory_.GetWeakPtr(), task_runner_)); |
| } |
| |
| HidServiceWin::~HidServiceWin() {} |
| |
| void HidServiceWin::Connect(const std::string& device_guid, |
| const ConnectCallback& callback) { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| const auto& map_entry = devices().find(device_guid); |
| if (map_entry == devices().end()) { |
| task_runner_->PostTask(FROM_HERE, base::Bind(callback, nullptr)); |
| return; |
| } |
| scoped_refptr<HidDeviceInfo> device_info = map_entry->second; |
| |
| base::win::ScopedHandle file(OpenDevice(device_info->platform_device_id())); |
| if (!file.IsValid()) { |
| HID_PLOG(EVENT) << "Failed to open device"; |
| task_runner_->PostTask(FROM_HERE, base::Bind(callback, nullptr)); |
| return; |
| } |
| |
| task_runner_->PostTask( |
| FROM_HERE, base::Bind(callback, base::MakeRefCounted<HidConnectionWin>( |
| device_info, std::move(file)))); |
| } |
| |
| // static |
| void HidServiceWin::EnumerateBlocking( |
| base::WeakPtr<HidServiceWin> service, |
| scoped_refptr<base::SequencedTaskRunner> task_runner) { |
| HDEVINFO device_info_set = |
| SetupDiGetClassDevs(&GUID_DEVINTERFACE_HID, NULL, NULL, |
| DIGCF_PRESENT | DIGCF_DEVICEINTERFACE); |
| |
| if (device_info_set != INVALID_HANDLE_VALUE) { |
| SP_DEVICE_INTERFACE_DATA device_interface_data; |
| device_interface_data.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA); |
| |
| for (int device_index = 0; |
| SetupDiEnumDeviceInterfaces(device_info_set, |
| NULL, |
| &GUID_DEVINTERFACE_HID, |
| device_index, |
| &device_interface_data); |
| ++device_index) { |
| DWORD required_size = 0; |
| |
| // Determime the required size of detail struct. |
| SetupDiGetDeviceInterfaceDetail(device_info_set, &device_interface_data, |
| NULL, 0, &required_size, NULL); |
| |
| std::unique_ptr<SP_DEVICE_INTERFACE_DETAIL_DATA, base::FreeDeleter> |
| device_interface_detail_data( |
| static_cast<SP_DEVICE_INTERFACE_DETAIL_DATA*>(malloc(required_size))); |
| device_interface_detail_data->cbSize = |
| sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA); |
| |
| // Get the detailed data for this device. |
| BOOL res = SetupDiGetDeviceInterfaceDetail( |
| device_info_set, &device_interface_data, |
| device_interface_detail_data.get(), required_size, NULL, NULL); |
| if (!res) { |
| continue; |
| } |
| |
| std::string device_path( |
| base::SysWideToUTF8(device_interface_detail_data->DevicePath)); |
| DCHECK(base::IsStringASCII(device_path)); |
| AddDeviceBlocking(service, task_runner, base::ToLowerASCII(device_path)); |
| } |
| } |
| |
| task_runner->PostTask( |
| FROM_HERE, base::Bind(&HidServiceWin::FirstEnumerationComplete, service)); |
| } |
| |
| // static |
| void HidServiceWin::CollectInfoFromButtonCaps( |
| PHIDP_PREPARSED_DATA preparsed_data, |
| HIDP_REPORT_TYPE report_type, |
| USHORT button_caps_length, |
| HidCollectionInfo* collection_info) { |
| if (button_caps_length > 0) { |
| std::unique_ptr<HIDP_BUTTON_CAPS[]> button_caps( |
| new HIDP_BUTTON_CAPS[button_caps_length]); |
| if (HidP_GetButtonCaps(report_type, |
| &button_caps[0], |
| &button_caps_length, |
| preparsed_data) == HIDP_STATUS_SUCCESS) { |
| for (size_t i = 0; i < button_caps_length; i++) { |
| int report_id = button_caps[i].ReportID; |
| if (report_id != 0) { |
| collection_info->report_ids.insert(report_id); |
| } |
| } |
| } |
| } |
| } |
| |
| // static |
| void HidServiceWin::CollectInfoFromValueCaps( |
| PHIDP_PREPARSED_DATA preparsed_data, |
| HIDP_REPORT_TYPE report_type, |
| USHORT value_caps_length, |
| HidCollectionInfo* collection_info) { |
| if (value_caps_length > 0) { |
| std::unique_ptr<HIDP_VALUE_CAPS[]> value_caps( |
| new HIDP_VALUE_CAPS[value_caps_length]); |
| if (HidP_GetValueCaps( |
| report_type, &value_caps[0], &value_caps_length, preparsed_data) == |
| HIDP_STATUS_SUCCESS) { |
| for (size_t i = 0; i < value_caps_length; i++) { |
| int report_id = value_caps[i].ReportID; |
| if (report_id != 0) { |
| collection_info->report_ids.insert(report_id); |
| } |
| } |
| } |
| } |
| } |
| |
| // static |
| void HidServiceWin::AddDeviceBlocking( |
| base::WeakPtr<HidServiceWin> service, |
| scoped_refptr<base::SequencedTaskRunner> task_runner, |
| const std::string& device_path) { |
| base::win::ScopedHandle device_handle(OpenDevice(device_path)); |
| if (!device_handle.IsValid()) { |
| return; |
| } |
| |
| HIDD_ATTRIBUTES attrib = {0}; |
| attrib.Size = sizeof(HIDD_ATTRIBUTES); |
| if (!HidD_GetAttributes(device_handle.Get(), &attrib)) { |
| HID_LOG(EVENT) << "Failed to get device attributes."; |
| return; |
| } |
| |
| PHIDP_PREPARSED_DATA preparsed_data = nullptr; |
| if (!HidD_GetPreparsedData(device_handle.Get(), &preparsed_data) || |
| !preparsed_data) { |
| HID_LOG(EVENT) << "Failed to get device data."; |
| return; |
| } |
| |
| HIDP_CAPS capabilities = {0}; |
| if (HidP_GetCaps(preparsed_data, &capabilities) != HIDP_STATUS_SUCCESS) { |
| HID_LOG(EVENT) << "Failed to get device capabilities."; |
| HidD_FreePreparsedData(preparsed_data); |
| return; |
| } |
| |
| // Whether or not the device includes report IDs in its reports the size |
| // of the report ID is included in the value provided by Windows. This |
| // appears contrary to the MSDN documentation. |
| size_t max_input_report_size = 0; |
| size_t max_output_report_size = 0; |
| size_t max_feature_report_size = 0; |
| if (capabilities.InputReportByteLength > 0) { |
| max_input_report_size = capabilities.InputReportByteLength - 1; |
| } |
| if (capabilities.OutputReportByteLength > 0) { |
| max_output_report_size = capabilities.OutputReportByteLength - 1; |
| } |
| if (capabilities.FeatureReportByteLength > 0) { |
| max_feature_report_size = capabilities.FeatureReportByteLength - 1; |
| } |
| |
| HidCollectionInfo collection_info; |
| collection_info.usage = HidUsageAndPage( |
| capabilities.Usage, |
| static_cast<HidUsageAndPage::Page>(capabilities.UsagePage)); |
| CollectInfoFromButtonCaps(preparsed_data, HidP_Input, |
| capabilities.NumberInputButtonCaps, |
| &collection_info); |
| CollectInfoFromButtonCaps(preparsed_data, HidP_Output, |
| capabilities.NumberOutputButtonCaps, |
| &collection_info); |
| CollectInfoFromButtonCaps(preparsed_data, HidP_Feature, |
| capabilities.NumberFeatureButtonCaps, |
| &collection_info); |
| CollectInfoFromValueCaps(preparsed_data, HidP_Input, |
| capabilities.NumberInputValueCaps, &collection_info); |
| CollectInfoFromValueCaps(preparsed_data, HidP_Output, |
| capabilities.NumberOutputValueCaps, |
| &collection_info); |
| CollectInfoFromValueCaps(preparsed_data, HidP_Feature, |
| capabilities.NumberFeatureValueCaps, |
| &collection_info); |
| |
| // 1023 characters plus NULL terminator is more than enough for a USB string |
| // descriptor which is limited to 126 characters. |
| wchar_t buffer[1024]; |
| std::string product_name; |
| if (HidD_GetProductString(device_handle.Get(), &buffer[0], sizeof(buffer))) { |
| // NULL termination guaranteed by the API. |
| product_name = base::SysWideToUTF8(buffer); |
| } |
| std::string serial_number; |
| if (HidD_GetSerialNumberString(device_handle.Get(), &buffer[0], |
| sizeof(buffer))) { |
| // NULL termination guaranteed by the API. |
| serial_number = base::SysWideToUTF8(buffer); |
| } |
| |
| // This populates the HidDeviceInfo instance without a raw report descriptor. |
| // The descriptor is unavailable on Windows because HID devices are exposed to |
| // user-space as individual top-level collections. |
| scoped_refptr<HidDeviceInfo> device_info(new HidDeviceInfo( |
| device_path, attrib.VendorID, attrib.ProductID, product_name, |
| serial_number, |
| kHIDBusTypeUSB, // TODO(reillyg): Detect Bluetooth. crbug.com/443335 |
| collection_info, max_input_report_size, max_output_report_size, |
| max_feature_report_size)); |
| |
| HidD_FreePreparsedData(preparsed_data); |
| task_runner->PostTask( |
| FROM_HERE, base::Bind(&HidServiceWin::AddDevice, service, device_info)); |
| } |
| |
| void HidServiceWin::OnDeviceAdded(const GUID& class_guid, |
| const std::string& device_path) { |
| blocking_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&HidServiceWin::AddDeviceBlocking, weak_factory_.GetWeakPtr(), |
| task_runner_, device_path)); |
| } |
| |
| void HidServiceWin::OnDeviceRemoved(const GUID& class_guid, |
| const std::string& device_path) { |
| // Execute a no-op closure on the file task runner to synchronize with any |
| // devices that are still being enumerated. |
| blocking_task_runner_->PostTaskAndReply( |
| FROM_HERE, base::Bind(&base::DoNothing), |
| base::Bind(&HidServiceWin::RemoveDevice, weak_factory_.GetWeakPtr(), |
| device_path)); |
| } |
| |
| // static |
| base::win::ScopedHandle HidServiceWin::OpenDevice( |
| const std::string& device_path) { |
| base::win::ScopedHandle file( |
| CreateFileA(device_path.c_str(), GENERIC_WRITE | GENERIC_READ, |
| FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, |
| FILE_FLAG_OVERLAPPED, NULL)); |
| if (!file.IsValid() && GetLastError() == ERROR_ACCESS_DENIED) { |
| file.Set(CreateFileA(device_path.c_str(), GENERIC_READ, FILE_SHARE_READ, |
| NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL)); |
| } |
| return file; |
| } |
| |
| } // namespace device |
