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Atmosphere/troposphere/haze/source/ptp_responder_mtp_operations.cpp

418 lines
17 KiB
C++

/*
* 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::GetObjectPropsSupported(PtpDataParser &dp) {
R_TRY(dp.Finalize());
PtpDataBuilder db(m_buffers->usb_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(m_buffers->usb_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());
/* 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(m_buffers->usb_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::GetObjectPropList(PtpDataParser &dp) {
u32 object_id;
u32 object_format;
s32 property_code;
s32 group_code;
s32 depth;
R_TRY(dp.Read(std::addressof(object_id)));
R_TRY(dp.Read(std::addressof(object_format)));
R_TRY(dp.Read(std::addressof(property_code)));
R_TRY(dp.Read(std::addressof(group_code)));
R_TRY(dp.Read(std::addressof(depth)));
R_TRY(dp.Finalize());
/* Ensure format is unspecified. */
R_UNLESS(object_format == 0, haze::ResultInvalidArgument());
/* Ensure we have a valid property code. */
R_UNLESS(property_code == -1 || IsSupportedObjectPropertyCode(PtpObjectPropertyCode(property_code)), haze::ResultUnknownPropertyCode());
/* Ensure group code is the default. */
R_UNLESS(group_code == PtpPropertyGroupCode_Default, haze::ResultGroupSpecified());
/* Ensure depth is 0. */
R_UNLESS(depth == 0, haze::ResultDepthSpecified());
/* 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));
};
/* Define helper for determining if the property should be included. */
const auto ShouldIncludeProperty = [&] (PtpObjectPropertyCode code) {
/* If all properties were requested, or it was the requested property, we should include the property. */
return property_code == -1 || code == property_code;
};
/* Determine how many output elements we will report. */
u32 num_output_elements = 0;
for (const auto obj_property : SupportedObjectProperties) {
if (ShouldIncludeProperty(obj_property)) {
num_output_elements++;
}
}
/* Begin writing the requested object properties. */
PtpDataBuilder db(m_buffers->usb_bulk_write_buffer, std::addressof(m_usb_server));
R_TRY(db.WriteVariableLengthData(m_request_header, [&] {
/* Report the number of elements. */
R_TRY(db.Add(num_output_elements));
for (const auto obj_property : SupportedObjectProperties) {
if (!ShouldIncludeProperty(obj_property)) {
continue;
}
/* Write the object handle. */
R_TRY(db.Add<u32>(object_id));
/* Write the property code. */
R_TRY(db.Add<u16>(obj_property));
/* Write the property value. */
switch (obj_property) {
case PtpObjectPropertyCode_PersistentUniqueObjectIdentifier:
{
R_TRY(db.Add(PtpDataTypeCode_U128));
R_TRY(db.Add<u128>(object_id));
}
break;
case PtpObjectPropertyCode_ObjectSize:
{
s64 size;
R_TRY(GetObjectSize(std::addressof(size)));
R_TRY(db.Add(PtpDataTypeCode_U64));
R_TRY(db.Add<u64>(size));
}
break;
case PtpObjectPropertyCode_StorageId:
{
R_TRY(db.Add(PtpDataTypeCode_U32));
R_TRY(db.Add(StorageId_SdmcFs));
}
break;
case PtpObjectPropertyCode_ParentObject:
{
R_TRY(db.Add(PtpDataTypeCode_U32));
R_TRY(db.Add(obj->GetParentId()));
}
break;
case PtpObjectPropertyCode_ObjectFormat:
{
FsDirEntryType entry_type;
R_TRY(GetObjectType(std::addressof(entry_type)));
R_TRY(db.Add(PtpDataTypeCode_U16));
R_TRY(db.Add(entry_type == FsDirEntryType_File ? PtpObjectFormatCode_Undefined : PtpObjectFormatCode_Association));
}
break;
case PtpObjectPropertyCode_ObjectFileName:
{
R_TRY(db.Add(PtpDataTypeCode_String));
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(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());
/* 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(m_buffers->filename_string_buffer));
R_TRY(dp.Finalize());
/* Ensure we can actually process the new name. */
const bool is_empty = m_buffers->filename_string_buffer[0] == '\x00';
const bool contains_slashes = std::strchr(m_buffers->filename_string_buffer, '/') != 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(), m_buffers->filename_string_buffer, 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));
}
}