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Atmosphere/troposphere/haze/source/ptp_responder.cpp

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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <haze.hpp>
#include <haze/ptp_data_builder.hpp>
#include <haze/ptp_data_parser.hpp>
namespace haze {
namespace {
constexpr UsbCommsInterfaceInfo MtpInterfaceInfo = {
.bInterfaceClass = 0x06,
.bInterfaceSubClass = 0x01,
.bInterfaceProtocol = 0x01,
};
/* This is a VID:PID recognized by libmtp. */
constexpr u16 SwitchMtpIdVendor = 0x057e;
constexpr u16 SwitchMtpIdProduct = 0x201d;
/* Constants used for MTP GetDeviceInfo response. */
constexpr u16 MtpStandardVersion = 100;
constexpr u32 MtpVendorExtensionId = 6;
constexpr auto MtpVendorExtensionDesc = "microsoft.com: 1.0;";
constexpr u16 MtpFunctionalModeDefault = 0;
constexpr auto MtpDeviceManufacturer = "Nintendo";
constexpr auto MtpDeviceModel = "Nintendo Switch";
enum StorageId : u32 {
StorageId_SdmcFs = 0xffffffffu - 1,
};
constexpr PtpOperationCode SupportedOperationCodes[] = {
PtpOperationCode_GetDeviceInfo,
PtpOperationCode_OpenSession,
PtpOperationCode_CloseSession,
PtpOperationCode_GetStorageIds,
PtpOperationCode_GetStorageInfo,
PtpOperationCode_GetObjectHandles,
PtpOperationCode_GetObjectInfo,
PtpOperationCode_GetObject,
PtpOperationCode_SendObjectInfo,
PtpOperationCode_SendObject,
PtpOperationCode_DeleteObject,
PtpOperationCode_MtpGetObjectPropsSupported,
PtpOperationCode_MtpGetObjectPropDesc,
PtpOperationCode_MtpGetObjectPropValue,
PtpOperationCode_MtpSetObjectPropValue,
};
constexpr const PtpEventCode SupportedEventCodes[] = { /* ... */ };
constexpr const PtpDevicePropertyCode SupportedDeviceProperties[] = { /* ... */ };
constexpr const PtpObjectFormatCode SupportedCaptureFormats[] = { /* ... */ };
constexpr const PtpObjectFormatCode SupportedPlaybackFormats[] = {
PtpObjectFormatCode_Undefined,
PtpObjectFormatCode_Association,
};
constexpr const PtpObjectPropertyCode SupportedObjectProperties[] = {
PtpObjectPropertyCode_StorageId,
PtpObjectPropertyCode_ObjectFormat,
PtpObjectPropertyCode_ObjectSize,
PtpObjectPropertyCode_ObjectFileName,
PtpObjectPropertyCode_ParentObject,
PtpObjectPropertyCode_PersistentUniqueObjectIdentifier,
};
constexpr bool IsSupportedObjectPropertyCode(PtpObjectPropertyCode c) {
for (size_t i = 0; i < util::size(SupportedObjectProperties); i++) {
if (SupportedObjectProperties[i] == c) {
return true;
}
}
return false;
}
constexpr const StorageId SupportedStorageIds[] = {
StorageId_SdmcFs,
};
struct PtpStorageInfo {
PtpStorageType storage_type;
PtpFilesystemType filesystem_type;
PtpAccessCapability access_capability;
u64 max_capacity;
u64 free_space_in_bytes;
u32 free_space_in_images;
const char *storage_description;
const char *volume_label;
};
constexpr PtpStorageInfo DefaultStorageInfo = {
.storage_type = PtpStorageType_FixedRam,
.filesystem_type = PtpFilesystemType_GenericHierarchical,
.access_capability = PtpAccessCapability_ReadWrite,
.max_capacity = 0,
.free_space_in_bytes = 0,
.free_space_in_images = 0,
.storage_description = "",
.volume_label = "",
};
struct PtpObjectInfo {
StorageId storage_id;
PtpObjectFormatCode object_format;
PtpProtectionStatus protection_status;
u32 object_compressed_size;
u16 thumb_format;
u32 thumb_compressed_size;
u32 thumb_width;
u32 thumb_height;
u32 image_width;
u32 image_height;
u32 image_depth;
u32 parent_object;
PtpAssociationType association_type;
u32 association_desc;
u32 sequence_number;
const char *filename;
const char *capture_date;
const char *modification_date;
const char *keywords;
};
constexpr PtpObjectInfo DefaultObjectInfo = {
.storage_id = StorageId_SdmcFs,
.object_format = {},
.protection_status = PtpProtectionStatus_NoProtection,
.object_compressed_size = 0,
.thumb_format = 0,
.thumb_compressed_size = 0,
.thumb_width = 0,
.thumb_height = 0,
.image_width = 0,
.image_height = 0,
.image_depth = 0,
.parent_object = PtpGetObjectHandles_RootParent,
.association_type = PtpAssociationType_Undefined,
.association_desc = 0,
.sequence_number = 0,
.filename = nullptr,
.capture_date = "",
.modification_date = "",
.keywords = "",
};
constexpr s64 DirectoryReadSize = 32;
constexpr u64 FsBufferSize = haze::UsbBulkPacketBufferSize;
constinit char g_filename_str[PtpStringMaxLength + 1] = {};
constinit char g_capture_date_str[PtpStringMaxLength + 1] = {};
constinit char g_modification_date_str[PtpStringMaxLength + 1] = {};
constinit char g_keywords_str[PtpStringMaxLength + 1] = {};
constinit FsDirectoryEntry g_dir_entries[DirectoryReadSize] = {};
constinit u8 g_fs_buffer[FsBufferSize] = {};
alignas(4_KB) constinit u8 g_bulk_write_buffer[haze::UsbBulkPacketBufferSize] = {};
alignas(4_KB) constinit u8 g_bulk_read_buffer[haze::UsbBulkPacketBufferSize] = {};
}
Result PtpResponder::Initialize(EventReactor *reactor, PtpObjectHeap *object_heap) {
m_object_heap = object_heap;
/* Configure fs proxy. */
m_fs.Initialize(reactor, fsdevGetDeviceFileSystem("sdmc"));
R_RETURN(m_usb_server.Initialize(std::addressof(MtpInterfaceInfo), SwitchMtpIdVendor, SwitchMtpIdProduct, reactor));
}
void PtpResponder::Finalize() {
m_usb_server.Finalize();
m_fs.Finalize();
}
Result PtpResponder::LoopProcess() {
while (true) {
/* Try to handle a request. */
R_TRY_CATCH(this->HandleRequest()) {
R_CATCH(haze::ResultStopRequested, haze::ResultFocusLost) {
/* If we encountered a stop condition, we're done.*/
R_THROW(R_CURRENT_RESULT);
}
R_CATCH_ALL() {
/* On other failures, try to handle another request. */
continue;
}
} R_END_TRY_CATCH;
/* Otherwise, handle the next request. */
/* ... */
}
}
Result PtpResponder::HandleRequest() {
ON_RESULT_FAILURE {
/* For general failure modes, the failure is unrecoverable. Close the session. */
this->ForceCloseSession();
};
R_TRY_CATCH(this->HandleRequestImpl()) {
R_CATCH(haze::ResultUnknownRequestType) {
R_TRY(this->WriteResponse(PtpResponseCode_GeneralError));
}
R_CATCH(haze::ResultSessionNotOpen) {
R_TRY(this->WriteResponse(PtpResponseCode_SessionNotOpen));
}
R_CATCH(haze::ResultOperationNotSupported) {
R_TRY(this->WriteResponse(PtpResponseCode_OperationNotSupported));
}
R_CATCH(haze::ResultInvalidStorageId) {
R_TRY(this->WriteResponse(PtpResponseCode_InvalidStorageId));
}
R_CATCH(haze::ResultInvalidObjectId) {
R_TRY(this->WriteResponse(PtpResponseCode_InvalidObjectHandle));
}
R_CATCH(haze::ResultUnknownPropertyCode) {
R_TRY(this->WriteResponse(PtpResponseCode_MtpObjectPropNotSupported));
}
R_CATCH(haze::ResultInvalidPropertyValue) {
R_TRY(this->WriteResponse(PtpResponseCode_MtpInvalidObjectPropValue));
}
R_CATCH_MODULE(fs) {
/* Errors from fs are typically recoverable. */
R_TRY(this->WriteResponse(PtpResponseCode_GeneralError));
}
} R_END_TRY_CATCH;
R_SUCCEED();
}
Result PtpResponder::HandleRequestImpl() {
PtpDataParser dp(g_bulk_read_buffer, std::addressof(m_usb_server));
R_TRY(dp.Read(std::addressof(m_request_header)));
switch (m_request_header.type) {
case PtpUsbBulkContainerType_Command: R_RETURN(this->HandleCommandRequest(dp));
default: R_THROW(haze::ResultUnknownRequestType());
}
}
Result PtpResponder::HandleCommandRequest(PtpDataParser &dp) {
if (!m_session_open && m_request_header.code != PtpOperationCode_OpenSession && m_request_header.code != PtpOperationCode_GetDeviceInfo) {
R_THROW(haze::ResultSessionNotOpen());
}
switch (m_request_header.code) {
case PtpOperationCode_GetDeviceInfo: R_RETURN(this->GetDeviceInfo(dp)); break;
case PtpOperationCode_OpenSession: R_RETURN(this->OpenSession(dp)); break;
case PtpOperationCode_CloseSession: R_RETURN(this->CloseSession(dp)); break;
case PtpOperationCode_GetStorageIds: R_RETURN(this->GetStorageIds(dp)); break;
case PtpOperationCode_GetStorageInfo: R_RETURN(this->GetStorageInfo(dp)); break;
case PtpOperationCode_GetObjectHandles: R_RETURN(this->GetObjectHandles(dp)); break;
case PtpOperationCode_GetObjectInfo: R_RETURN(this->GetObjectInfo(dp)); break;
case PtpOperationCode_GetObject: R_RETURN(this->GetObject(dp)); break;
case PtpOperationCode_SendObjectInfo: R_RETURN(this->SendObjectInfo(dp)); break;
case PtpOperationCode_SendObject: R_RETURN(this->SendObject(dp)); break;
case PtpOperationCode_DeleteObject: R_RETURN(this->DeleteObject(dp)); break;
case PtpOperationCode_MtpGetObjectPropsSupported: R_RETURN(this->GetObjectPropsSupported(dp)); break;
case PtpOperationCode_MtpGetObjectPropDesc: R_RETURN(this->GetObjectPropDesc(dp)); break;
case PtpOperationCode_MtpGetObjectPropValue: R_RETURN(this->GetObjectPropValue(dp)); break;
case PtpOperationCode_MtpSetObjectPropValue: R_RETURN(this->SetObjectPropValue(dp)); break;
default: R_THROW(haze::ResultOperationNotSupported());
}
}
void PtpResponder::ForceCloseSession() {
if (m_session_open) {
m_session_open = false;
m_object_database.Finalize();
}
}
template <typename Data>
Result PtpResponder::WriteResponse(PtpResponseCode code, Data &&data) {
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
R_TRY(db.AddResponseHeader(m_request_header, code, sizeof(Data)));
R_TRY(db.Add(data));
R_RETURN(db.Commit());
}
Result PtpResponder::WriteResponse(PtpResponseCode code) {
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
R_TRY(db.AddResponseHeader(m_request_header, code, 0));
R_RETURN(db.Commit());
}
Result PtpResponder::GetDeviceInfo(PtpDataParser &dp) {
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
/* Write the device info data. */
R_TRY(db.WriteVariableLengthData(m_request_header, [&] () {
R_TRY(db.Add(MtpStandardVersion));
R_TRY(db.Add(MtpVendorExtensionId));
R_TRY(db.Add(MtpStandardVersion));
R_TRY(db.AddString(MtpVendorExtensionDesc));
R_TRY(db.Add(MtpFunctionalModeDefault));
R_TRY(db.AddArray(SupportedOperationCodes, util::size(SupportedOperationCodes)));
R_TRY(db.AddArray(SupportedEventCodes, util::size(SupportedEventCodes)));
R_TRY(db.AddArray(SupportedDeviceProperties, util::size(SupportedDeviceProperties)));
R_TRY(db.AddArray(SupportedCaptureFormats, util::size(SupportedCaptureFormats)));
R_TRY(db.AddArray(SupportedPlaybackFormats, util::size(SupportedPlaybackFormats)));
R_TRY(db.AddString(MtpDeviceManufacturer));
R_TRY(db.AddString(MtpDeviceModel));
R_TRY(db.AddString(GetFirmwareVersion()));
R_TRY(db.AddString(GetSerialNumber()));
R_SUCCEED();
}));
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::OpenSession(PtpDataParser &dp) {
R_TRY(dp.Finalize());
/* Close, if we're already open. */
this->ForceCloseSession();
/* Initialize the database. */
m_session_open = true;
m_object_database.Initialize(m_object_heap);
/* Create the root storages. */
PtpObject *object;
R_TRY(m_object_database.CreateOrFindObject("", "", PtpGetObjectHandles_RootParent, std::addressof(object)));
/* Register the root storages. */
m_object_database.RegisterObject(object, StorageId_SdmcFs);
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::CloseSession(PtpDataParser &dp) {
R_TRY(dp.Finalize());
this->ForceCloseSession();
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::GetStorageIds(PtpDataParser &dp) {
R_TRY(dp.Finalize());
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
/* Write the storage ID array. */
R_TRY(db.WriteVariableLengthData(m_request_header, [&] {
R_RETURN(db.AddArray(SupportedStorageIds, util::size(SupportedStorageIds)));
}));
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::GetStorageInfo(PtpDataParser &dp) {
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
PtpStorageInfo storage_info(DefaultStorageInfo);
/* Get the storage ID the client requested information for. */
u32 storage_id;
R_TRY(dp.Read(std::addressof(storage_id)));
R_TRY(dp.Finalize());
/* Get the info from fs. */
switch (storage_id) {
case StorageId_SdmcFs:
{
s64 total_space, free_space;
R_TRY(m_fs.GetTotalSpace("/", std::addressof(total_space)));
R_TRY(m_fs.GetFreeSpace("/", std::addressof(free_space)));
storage_info.max_capacity = total_space;
storage_info.free_space_in_bytes = free_space;
storage_info.free_space_in_images = 0;
storage_info.storage_description = "SD Card";
}
break;
default:
R_THROW(haze::ResultInvalidStorageId());
}
/* Write the storage info data. */
R_TRY(db.WriteVariableLengthData(m_request_header, [&] () {
R_TRY(db.Add(storage_info.storage_type));
R_TRY(db.Add(storage_info.filesystem_type));
R_TRY(db.Add(storage_info.access_capability));
R_TRY(db.Add(storage_info.max_capacity));
R_TRY(db.Add(storage_info.free_space_in_bytes));
R_TRY(db.Add(storage_info.free_space_in_images));
R_TRY(db.AddString(storage_info.storage_description));
R_TRY(db.AddString(storage_info.volume_label));
R_SUCCEED();
}));
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::GetObjectHandles(PtpDataParser &dp) {
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
/* Get the object ID the client requested enumeration for. */
u32 storage_id, object_format_code, association_object_handle;
R_TRY(dp.Read(std::addressof(storage_id)));
R_TRY(dp.Read(std::addressof(object_format_code)));
R_TRY(dp.Read(std::addressof(association_object_handle)));
R_TRY(dp.Finalize());
/* Handle top-level requests. */
if (storage_id == PtpGetObjectHandles_AllStorage) {
storage_id = StorageId_SdmcFs;
}
/* Rewrite requests for enumerating storage directories. */
if (association_object_handle == PtpGetObjectHandles_RootParent) {
association_object_handle = storage_id;
}
/* Check if we know about the object. If we don't, it's an error. */
auto * const obj = m_object_database.GetObjectById(association_object_handle);
R_UNLESS(obj != nullptr, haze::ResultInvalidObjectId());
/* Try to read the object as a directory. */
FsDir dir;
R_TRY(m_fs.OpenDirectory(obj->GetName(), FsDirOpenMode_ReadDirs | FsDirOpenMode_ReadFiles, std::addressof(dir)));
/* Ensure we maintain a clean state on exit. */
ON_SCOPE_EXIT { m_fs.CloseDirectory(std::addressof(dir)); };
/* Count how many entries are in the directory. */
s64 entry_count = 0;
R_TRY(m_fs.GetDirectoryEntryCount(std::addressof(dir), std::addressof(entry_count)));
/* Begin writing. */
R_TRY(db.AddDataHeader(m_request_header, sizeof(u32) + (entry_count * sizeof(u32))));
R_TRY(db.Add(static_cast<u32>(entry_count)));
/* Enumerate the directory, writing results to the data builder as we progress. */
/* TODO: How should we handle the directory contents changing during enumeration? */
/* Is this even feasible to handle? */
while (true) {
/* Get the next batch. */
s64 read_count = 0;
R_TRY(m_fs.ReadDirectory(std::addressof(dir), std::addressof(read_count), DirectoryReadSize, g_dir_entries));
/* Write to output. */
for (s64 i = 0; i < read_count; i++) {
u32 handle;
R_TRY(m_object_database.CreateAndRegisterObjectId(obj->GetName(), g_dir_entries[i].name, obj->GetObjectId(), std::addressof(handle)));
R_TRY(db.Add(handle));
}
/* If we read fewer than the batch size, we're done. */
if (read_count < DirectoryReadSize) {
break;
}
}
/* Flush the data response. */
R_TRY(db.Commit());
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::GetObjectInfo(PtpDataParser &dp) {
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
/* Get the object ID the client requested info for. */
u32 object_id;
R_TRY(dp.Read(std::addressof(object_id)));
R_TRY(dp.Finalize());
/* Check if we know about the object. If we don't, it's an error. */
auto * const obj = m_object_database.GetObjectById(object_id);
R_UNLESS(obj != nullptr, haze::ResultInvalidObjectId());
/* Build info about the object. */
PtpObjectInfo object_info(DefaultObjectInfo);
if (object_id == StorageId_SdmcFs) {
/* The SD Card directory has some special properties. */
object_info.object_format = PtpObjectFormatCode_Association;
object_info.association_type = PtpAssociationType_GenericFolder;
object_info.filename = "SD Card";
} else {
/* Figure out what type of object this is. */
FsDirEntryType entry_type;
R_TRY(m_fs.GetEntryType(obj->GetName(), std::addressof(entry_type)));
/* Get the size, if we are requesting info about a file. */
s64 size = 0;
if (entry_type == FsDirEntryType_File) {
FsFile file;
R_TRY(m_fs.OpenFile(obj->GetName(), FsOpenMode_Read, std::addressof(file)));
/* Ensure we maintain a clean state on exit. */
ON_SCOPE_EXIT { m_fs.CloseFile(std::addressof(file)); };
R_TRY(m_fs.GetFileSize(std::addressof(file), std::addressof(size)));
}
object_info.filename = std::strrchr(obj->GetName(), '/') + 1;
object_info.object_compressed_size = size;
object_info.parent_object = obj->GetParentId();
if (entry_type == FsDirEntryType_Dir) {
object_info.object_format = PtpObjectFormatCode_Association;
object_info.association_type = PtpAssociationType_GenericFolder;
} else {
object_info.object_format = PtpObjectFormatCode_Undefined;
object_info.association_type = PtpAssociationType_Undefined;
}
}
/* Write the object info data. */
R_TRY(db.WriteVariableLengthData(m_request_header, [&] () {
R_TRY(db.Add(object_info.storage_id));
R_TRY(db.Add(object_info.object_format));
R_TRY(db.Add(object_info.protection_status));
R_TRY(db.Add(object_info.object_compressed_size));
R_TRY(db.Add(object_info.thumb_format));
R_TRY(db.Add(object_info.thumb_compressed_size));
R_TRY(db.Add(object_info.thumb_width));
R_TRY(db.Add(object_info.thumb_height));
R_TRY(db.Add(object_info.image_width));
R_TRY(db.Add(object_info.image_height));
R_TRY(db.Add(object_info.image_depth));
R_TRY(db.Add(object_info.parent_object));
R_TRY(db.Add(object_info.association_type));
R_TRY(db.Add(object_info.association_desc));
R_TRY(db.Add(object_info.sequence_number));
R_TRY(db.AddString(object_info.filename));
R_TRY(db.AddString(object_info.capture_date));
R_TRY(db.AddString(object_info.modification_date));
R_TRY(db.AddString(object_info.keywords));
R_SUCCEED();
}));
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::GetObject(PtpDataParser &dp) {
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
/* Get the object ID the client requested. */
u32 object_id;
R_TRY(dp.Read(std::addressof(object_id)));
R_TRY(dp.Finalize());
/* Check if we know about the object. If we don't, it's an error. */
auto * const obj = m_object_database.GetObjectById(object_id);
R_UNLESS(obj != nullptr, haze::ResultInvalidObjectId());
/* Lock the object as a file. */
FsFile file;
R_TRY(m_fs.OpenFile(obj->GetName(), FsOpenMode_Read, std::addressof(file)));
/* Ensure we maintain a clean state on exit. */
ON_SCOPE_EXIT { m_fs.CloseFile(std::addressof(file)); };
/* Get the file's size. */
s64 size = 0;
R_TRY(m_fs.GetFileSize(std::addressof(file), std::addressof(size)));
/* Send the header and file size. */
R_TRY(db.AddDataHeader(m_request_header, size));
/* Begin reading the file, writing data to the builder as we progress. */
s64 offset = 0;
while (true) {
/* Get the next batch. */
u64 bytes_read;
R_TRY(m_fs.ReadFile(std::addressof(file), offset, g_fs_buffer, FsBufferSize, FsReadOption_None, std::addressof(bytes_read)));
offset += bytes_read;
/* Write to output. */
R_TRY(db.AddBuffer(g_fs_buffer, bytes_read));
/* If we read fewer bytes than the batch size, we're done. */
if (bytes_read < FsBufferSize) {
break;
}
}
/* Flush the data response. */
R_TRY(db.Commit());
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::SendObjectInfo(PtpDataParser &rdp) {
/* Get the storage ID and parent object and flush the request packet. */
u32 storage_id, parent_object;
R_TRY(rdp.Read(std::addressof(storage_id)));
R_TRY(rdp.Read(std::addressof(parent_object)));
R_TRY(rdp.Finalize());
PtpDataParser dp(g_bulk_read_buffer, std::addressof(m_usb_server));
PtpObjectInfo info(DefaultObjectInfo);
/* Ensure we have a data header. */
PtpUsbBulkContainer data_header;
R_TRY(dp.Read(std::addressof(data_header)));
R_UNLESS(data_header.type == PtpUsbBulkContainerType_Data, haze::ResultUnknownRequestType());
R_UNLESS(data_header.code == m_request_header.code, haze::ResultOperationNotSupported());
R_UNLESS(data_header.trans_id == m_request_header.trans_id, haze::ResultOperationNotSupported());
/* Read in the object info. */
R_TRY(dp.Read(std::addressof(info.storage_id)));
R_TRY(dp.Read(std::addressof(info.object_format)));
R_TRY(dp.Read(std::addressof(info.protection_status)));
R_TRY(dp.Read(std::addressof(info.object_compressed_size)));
R_TRY(dp.Read(std::addressof(info.thumb_format)));
R_TRY(dp.Read(std::addressof(info.thumb_compressed_size)));
R_TRY(dp.Read(std::addressof(info.thumb_width)));
R_TRY(dp.Read(std::addressof(info.thumb_height)));
R_TRY(dp.Read(std::addressof(info.image_width)));
R_TRY(dp.Read(std::addressof(info.image_height)));
R_TRY(dp.Read(std::addressof(info.image_depth)));
R_TRY(dp.Read(std::addressof(info.parent_object)));
R_TRY(dp.Read(std::addressof(info.association_type)));
R_TRY(dp.Read(std::addressof(info.association_desc)));
R_TRY(dp.Read(std::addressof(info.sequence_number)));
R_TRY(dp.ReadString(g_filename_str));
R_TRY(dp.ReadString(g_capture_date_str));
R_TRY(dp.ReadString(g_modification_date_str));
R_TRY(dp.ReadString(g_keywords_str));
R_TRY(dp.Finalize());
/* Rewrite requests for creating in storage directories. */
if (parent_object == PtpGetObjectHandles_RootParent) {
parent_object = storage_id;
}
/* Check if we know about the parent object. If we don't, it's an error. */
auto * const parentobj = m_object_database.GetObjectById(parent_object);
R_UNLESS(parentobj != nullptr, haze::ResultInvalidObjectId());
/* Make a new object with the intended name. */
PtpNewObjectInfo new_object_info;
new_object_info.storage_id = StorageId_SdmcFs;
new_object_info.parent_object_id = parent_object == storage_id ? 0 : parent_object;
/* Create the object in the database. */
PtpObject *obj;
R_TRY(m_object_database.CreateOrFindObject(parentobj->GetName(), g_filename_str, parentobj->GetObjectId(), std::addressof(obj)));
/* Ensure we maintain a clean state on failure. */
ON_RESULT_FAILURE { m_object_database.DeleteObject(obj); };
/* Register the object with a new ID. */
m_object_database.RegisterObject(obj);
new_object_info.object_id = obj->GetObjectId();
/* Create the object on the filesystem. */
if (info.object_format == PtpObjectFormatCode_Association) {
R_TRY(m_fs.CreateDirectory(obj->GetName()));
m_send_object_id = 0;
} else {
R_TRY(m_fs.CreateFile(obj->GetName(), 0, 0));
m_send_object_id = new_object_info.object_id;
}
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok, new_object_info));
}
Result PtpResponder::SendObject(PtpDataParser &rdp) {
/* Reset SendObject object ID on exit. */
ON_SCOPE_EXIT { m_send_object_id = 0; };
R_TRY(rdp.Finalize());
PtpDataParser dp(g_bulk_read_buffer, std::addressof(m_usb_server));
/* Ensure we have a data header. */
PtpUsbBulkContainer data_header;
R_TRY(dp.Read(std::addressof(data_header)));
R_UNLESS(data_header.type == PtpUsbBulkContainerType_Data, haze::ResultUnknownRequestType());
R_UNLESS(data_header.code == m_request_header.code, haze::ResultOperationNotSupported());
R_UNLESS(data_header.trans_id == m_request_header.trans_id, haze::ResultOperationNotSupported());
/* Check if we know about the object. If we don't, it's an error. */
auto * const obj = m_object_database.GetObjectById(m_send_object_id);
R_UNLESS(obj != nullptr, haze::ResultInvalidObjectId());
/* Lock the object as a file. */
FsFile file;
R_TRY(m_fs.OpenFile(obj->GetName(), FsOpenMode_Write | FsOpenMode_Append, std::addressof(file)));
/* Ensure we maintain a clean state on exit. */
ON_SCOPE_EXIT { m_fs.CloseFile(std::addressof(file)); };
/* Truncate the file after locking for write. */
s64 offset = 0;
R_TRY(m_fs.SetFileSize(std::addressof(file), 0));
/* Expand to the needed size. */
R_TRY(m_fs.SetFileSize(std::addressof(file), data_header.length));
/* Begin writing to the filesystem. */
while (true) {
/* Read as many bytes as we can. */
u32 bytes_received;
const Result read_res = dp.ReadBuffer(g_fs_buffer, FsBufferSize, std::addressof(bytes_received));
/* Write to the file. */
R_TRY(m_fs.WriteFile(std::addressof(file), offset, g_fs_buffer, bytes_received, 0));
offset += bytes_received;
/* If we received fewer bytes than the batch size, we're done. */
if (haze::ResultEndOfTransmission::Includes(read_res)) {
break;
}
R_TRY(read_res);
}
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::DeleteObject(PtpDataParser &dp) {
/* Get the object ID and flush the request packet. */
u32 object_id;
R_TRY(dp.Read(std::addressof(object_id)));
R_TRY(dp.Finalize());
/* Disallow deleting the storage root. */
R_UNLESS(object_id != StorageId_SdmcFs, haze::ResultInvalidObjectId());
/* Check if we know about the object. If we don't, it's an error. */
auto * const obj = m_object_database.GetObjectById(object_id);
R_UNLESS(obj != nullptr, haze::ResultInvalidObjectId());
/* Figure out what type of object this is. */
FsDirEntryType entry_type;
R_TRY(m_fs.GetEntryType(obj->GetName(), std::addressof(entry_type)));
/* Remove the object from the filesystem. */
if (entry_type == FsDirEntryType_Dir) {
R_TRY(m_fs.DeleteDirectoryRecursively(obj->GetName()));
} else {
R_TRY(m_fs.DeleteFile(obj->GetName()));
}
/* Remove the object from the database. */
m_object_database.DeleteObject(obj);
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::GetObjectPropsSupported(PtpDataParser &dp) {
R_TRY(dp.Finalize());
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
/* Write information about all object properties we can support. */
R_TRY(db.WriteVariableLengthData(m_request_header, [&] {
R_RETURN(db.AddArray(SupportedObjectProperties, util::size(SupportedObjectProperties)));
}));
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::GetObjectPropDesc(PtpDataParser &dp) {
PtpObjectPropertyCode property_code;
u16 object_format;
R_TRY(dp.Read(std::addressof(property_code)));
R_TRY(dp.Read(std::addressof(object_format)));
R_TRY(dp.Finalize());
/* Ensure we have a valid property code before continuing. */
R_UNLESS(IsSupportedObjectPropertyCode(property_code), haze::ResultUnknownPropertyCode());
/* Begin writing information about the property code. */
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
R_TRY(db.WriteVariableLengthData(m_request_header, [&] {
R_TRY(db.Add(property_code));
/* Each property code corresponds to a different pattern, which contains the data type, */
/* whether the property can be set for an object, and the default value of the property. */
switch (property_code) {
case PtpObjectPropertyCode_PersistentUniqueObjectIdentifier:
{
R_TRY(db.Add(PtpDataTypeCode_U128));
R_TRY(db.Add(PtpPropertyGetSetFlag_Get));
R_TRY(db.Add<u128>(0));
}
case PtpObjectPropertyCode_ObjectSize:
{
R_TRY(db.Add(PtpDataTypeCode_U64));
R_TRY(db.Add(PtpPropertyGetSetFlag_Get));
R_TRY(db.Add<u64>(0));
}
break;
case PtpObjectPropertyCode_StorageId:
case PtpObjectPropertyCode_ParentObject:
{
R_TRY(db.Add(PtpDataTypeCode_U32));
R_TRY(db.Add(PtpPropertyGetSetFlag_Get));
R_TRY(db.Add(StorageId_SdmcFs));
}
break;
case PtpObjectPropertyCode_ObjectFormat:
{
R_TRY(db.Add(PtpDataTypeCode_U16));
R_TRY(db.Add(PtpPropertyGetSetFlag_Get));
R_TRY(db.Add(PtpObjectFormatCode_Undefined));
}
break;
case PtpObjectPropertyCode_ObjectFileName:
{
R_TRY(db.Add(PtpDataTypeCode_String));
R_TRY(db.Add(PtpPropertyGetSetFlag_GetSet));
R_TRY(db.AddString(""));
}
break;
HAZE_UNREACHABLE_DEFAULT_CASE();
}
/* Group code is a required part of the response, but doesn't seem to be used for anything. */
R_TRY(db.Add(PtpPropertyGroupCode_Default));
/* We don't use the form flag. */
R_TRY(db.Add(PtpPropertyFormFlag_None));
R_SUCCEED();
}));
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::GetObjectPropValue(PtpDataParser &dp) {
u32 object_id;
PtpObjectPropertyCode property_code;
R_TRY(dp.Read(std::addressof(object_id)));
R_TRY(dp.Read(std::addressof(property_code)));
R_TRY(dp.Finalize());
/* Disallow renaming the storage root. */
R_UNLESS(object_id != StorageId_SdmcFs, haze::ResultInvalidObjectId());
/* Ensure we have a valid property code before continuing. */
R_UNLESS(IsSupportedObjectPropertyCode(property_code), haze::ResultUnknownPropertyCode());
/* Check if we know about the object. If we don't, it's an error. */
auto * const obj = m_object_database.GetObjectById(object_id);
R_UNLESS(obj != nullptr, haze::ResultInvalidObjectId());
/* Define helper for getting the object type. */
const auto GetObjectType = [&] (FsDirEntryType *out_entry_type) {
R_RETURN(m_fs.GetEntryType(obj->GetName(), out_entry_type));
};
/* Define helper for getting the object size. */
const auto GetObjectSize = [&] (s64 *out_size) {
*out_size = 0;
/* Check if this is a directory. */
FsDirEntryType entry_type;
R_TRY(GetObjectType(std::addressof(entry_type)));
/* If it is, we're done. */
R_SUCCEED_IF(entry_type == FsDirEntryType_Dir);
/* Otherwise, open as a file. */
FsFile file;
R_TRY(m_fs.OpenFile(obj->GetName(), FsOpenMode_Read, std::addressof(file)));
/* Ensure we maintain a clean state on exit. */
ON_SCOPE_EXIT { m_fs.CloseFile(std::addressof(file)); };
R_RETURN(m_fs.GetFileSize(std::addressof(file), out_size));
};
/* Begin writing the requested object property. */
PtpDataBuilder db(g_bulk_write_buffer, std::addressof(m_usb_server));
R_TRY(db.WriteVariableLengthData(m_request_header, [&] {
switch (property_code) {
case PtpObjectPropertyCode_PersistentUniqueObjectIdentifier:
{
R_TRY(db.Add<u128>(object_id));
}
break;
case PtpObjectPropertyCode_ObjectSize:
{
s64 size;
R_TRY(GetObjectSize(std::addressof(size)));
R_TRY(db.Add<u64>(size));
}
break;
case PtpObjectPropertyCode_StorageId:
{
R_TRY(db.Add(StorageId_SdmcFs));
}
break;
case PtpObjectPropertyCode_ParentObject:
{
R_TRY(db.Add(obj->GetParentId()));
}
break;
case PtpObjectPropertyCode_ObjectFormat:
{
FsDirEntryType entry_type;
R_TRY(GetObjectType(std::addressof(entry_type)));
R_TRY(db.Add(entry_type == FsDirEntryType_File ? PtpObjectFormatCode_Undefined : PtpObjectFormatCode_Association));
}
break;
case PtpObjectPropertyCode_ObjectFileName:
{
R_TRY(db.AddString(std::strrchr(obj->GetName(), '/') + 1));
}
break;
HAZE_UNREACHABLE_DEFAULT_CASE();
}
R_SUCCEED();
}));
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::SetObjectPropValue(PtpDataParser &rdp) {
u32 object_id;
PtpObjectPropertyCode property_code;
R_TRY(rdp.Read(std::addressof(object_id)));
R_TRY(rdp.Read(std::addressof(property_code)));
R_TRY(rdp.Finalize());
PtpDataParser dp(g_bulk_read_buffer, std::addressof(m_usb_server));
/* Ensure we have a data header. */
PtpUsbBulkContainer data_header;
R_TRY(dp.Read(std::addressof(data_header)));
R_UNLESS(data_header.type == PtpUsbBulkContainerType_Data, haze::ResultUnknownRequestType());
R_UNLESS(data_header.code == m_request_header.code, haze::ResultOperationNotSupported());
R_UNLESS(data_header.trans_id == m_request_header.trans_id, haze::ResultOperationNotSupported());
/* Ensure we have a valid property code before continuing. */
R_UNLESS(property_code == PtpObjectPropertyCode_ObjectFileName, haze::ResultUnknownPropertyCode());
/* Check if we know about the object. If we don't, it's an error. */
auto * const obj = m_object_database.GetObjectById(object_id);
R_UNLESS(obj != nullptr, haze::ResultInvalidObjectId());
/* We are reading a file name. */
R_TRY(dp.ReadString(g_filename_str));
R_TRY(dp.Finalize());
/* Ensure we can actually process the new name. */
const bool is_empty = g_filename_str[0] == '\x00';
const bool contains_slashes = std::strchr(g_filename_str, '/') != nullptr;
R_UNLESS(!is_empty && !contains_slashes, haze::ResultInvalidPropertyValue());
/* Add a new object in the database with the new name. */
PtpObject *newobj;
{
/* Find the last path separator in the existing object name. */
char *pathsep = std::strrchr(obj->m_name, '/');
HAZE_ASSERT(pathsep != nullptr);
/* Temporarily mark the path separator as null to facilitate processing. */
*pathsep = '\x00';
ON_SCOPE_EXIT { *pathsep = '/'; };
R_TRY(m_object_database.CreateOrFindObject(obj->GetName(), g_filename_str, obj->GetParentId(), std::addressof(newobj)));
}
{
/* Ensure we maintain a clean state on failure. */
ON_RESULT_FAILURE {
if (!newobj->GetIsRegistered()) {
/* Only delete if the object was not registered. */
/* Otherwise, we would remove an object that still exists. */
m_object_database.DeleteObject(newobj);
}
};
/* Get the old object type. */
FsDirEntryType entry_type;
R_TRY(m_fs.GetEntryType(obj->GetName(), std::addressof(entry_type)));
/* Attempt to rename the object on the filesystem. */
if (entry_type == FsDirEntryType_Dir) {
R_TRY(m_fs.RenameDirectory(obj->GetName(), newobj->GetName()));
} else {
R_TRY(m_fs.RenameFile(obj->GetName(), newobj->GetName()));
}
}
/* Unregister and free the old object. */
m_object_database.DeleteObject(obj);
/* Register the new object. */
m_object_database.RegisterObject(newobj, object_id);
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
}
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