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Atmosphere/troposphere/haze/source/ptp_responder_ptp_operations.cpp
Liam 9e0daff46e haze: split operations by type
2023-10-11 18:57:49 -07:00

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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>
#include <haze/ptp_responder_types.hpp>
namespace haze {
Result PtpResponder::GetDeviceInfo(PtpDataParser &dp) {
PtpDataBuilder db(m_buffers->usb_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(m_buffers->usb_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(m_buffers->usb_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(m_buffers->usb_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, m_buffers->file_system_entry_buffer));
/* Write to output. */
for (s64 i = 0; i < read_count; i++) {
const char *name = m_buffers->file_system_entry_buffer[i].name;
u32 handle;
R_TRY(m_object_database.CreateAndRegisterObjectId(obj->GetName(), 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(m_buffers->usb_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(m_buffers->usb_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, m_buffers->file_system_data_buffer, FsBufferSize, FsReadOption_None, std::addressof(bytes_read)));
offset += bytes_read;
/* Write to output. */
R_TRY(db.AddBuffer(m_buffers->file_system_data_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(m_buffers->usb_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(m_buffers->filename_string_buffer));
R_TRY(dp.ReadString(m_buffers->capture_date_string_buffer));
R_TRY(dp.ReadString(m_buffers->modification_date_string_buffer));
R_TRY(dp.ReadString(m_buffers->keywords_string_buffer));
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(), m_buffers->filename_string_buffer, 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(m_buffers->usb_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. */
if (data_header.length > sizeof(PtpUsbBulkContainer)) {
R_TRY(m_fs.SetFileSize(std::addressof(file), data_header.length - sizeof(PtpUsbBulkContainer)));
}
/* Begin writing to the filesystem. */
while (true) {
/* Read as many bytes as we can. */
u32 bytes_received;
const Result read_res = dp.ReadBuffer(m_buffers->file_system_data_buffer, FsBufferSize, std::addressof(bytes_received));
/* Write to the file. */
R_TRY(m_fs.WriteFile(std::addressof(file), offset, m_buffers->file_system_data_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);
}
/* Truncate the file to the received size. */
R_TRY(m_fs.SetFileSize(std::addressof(file), offset));
/* 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));
}
}
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