/*
* 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::GetPartialObject64(PtpDataParser &dp) {
PtpDataBuilder db(m_buffers->usb_bulk_write_buffer, std::addressof(m_usb_server));
/* Get the object ID, offset, and size for the file we want to read. */
u32 object_id, size;
u64 offset;
R_TRY(dp.Read(std::addressof(object_id)));
R_TRY(dp.Read(std::addressof(offset)));
R_TRY(dp.Read(std::addressof(size)));
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 file_size = 0;
R_TRY(m_fs.GetFileSize(std::addressof(file), std::addressof(file_size)));
/* Ensure the requested offset and size are within range. */
R_UNLESS(offset + size > offset, haze::ResultInvalidArgument());
R_UNLESS(static_cast<u64>(file_size) <= offset + size, haze::ResultInvalidArgument());
/* Send the header and data size. */
R_TRY(db.AddDataHeader(m_request_header, size));
/* Begin reading the file, writing data to the builder as we progress. */
s64 size_remaining = size;
while (true) {
/* Get the next batch. */
u64 bytes_to_read = std::min<s64>(FsBufferSize, size_remaining);
u64 bytes_read;
R_TRY(m_fs.ReadFile(std::addressof(file), offset, m_buffers->file_system_data_buffer, bytes_to_read, FsReadOption_None, std::addressof(bytes_read)));
size_remaining -= 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, or have read enough data, we're done. */
if (bytes_read < FsBufferSize || size_remaining == 0) {
break;
}
}
/* Flush the data response. */
R_TRY(db.Commit());
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::SendPartialObject(PtpDataParser &rdp) {
/* Get the object ID, offset, and size for the file we want to write. */
u32 object_id, size;
u64 offset;
R_TRY(rdp.Read(std::addressof(object_id)));
R_TRY(rdp.Read(std::addressof(size)));
R_TRY(rdp.Read(std::addressof(offset)));
R_TRY(rdp.Finalize());
/* 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)); };
/* Get the file's size. */
s64 file_size = 0;
R_TRY(m_fs.GetFileSize(std::addressof(file), std::addressof(file_size)));
/* Ensure the requested offset and size are within range. */
R_UNLESS(offset + size > offset, haze::ResultInvalidArgument());
R_UNLESS(static_cast<u64>(file_size) <= offset, haze::ResultInvalidArgument());
/* Prepare a data parser for the data we are about to receive. */
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());
/* Begin writing to the filesystem. */
s64 size_remaining = size;
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. */
u32 bytes_to_write = std::min<s64>(size_remaining, bytes_received);
R_TRY(m_fs.WriteFile(std::addressof(file), offset, m_buffers->file_system_data_buffer, bytes_to_write, 0));
size_remaining -= bytes_to_write;
offset += bytes_to_write;
/* If we received fewer bytes than the batch size, or have written enough data, we're done. */
if (haze::ResultEndOfTransmission::Includes(read_res) || size_remaining == 0) {
break;
}
R_TRY(read_res);
}
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::TruncateObject(PtpDataParser &dp) {
/* Get the object ID and size for the file we want to truncate. */
u32 object_id;
u64 size;
R_TRY(dp.Read(std::addressof(object_id)));
R_TRY(dp.Read(std::addressof(size)));
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_Write, std::addressof(file)));
/* Ensure we maintain a clean state on exit. */
ON_SCOPE_EXIT { m_fs.CloseFile(std::addressof(file)); };
/* Truncate the file. */
R_TRY(m_fs.SetFileSize(std::addressof(file), size));
/* Write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::BeginEditObject(PtpDataParser &dp) {
/* Get the object ID we are going to begin editing. */
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());
/* We don't implement transactions, so write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
Result PtpResponder::EndEditObject(PtpDataParser &dp) {
/* Get the object ID we are going to finish editing. */
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());
/* We don't implement transactions, so write the success response. */
R_RETURN(this->WriteResponse(PtpResponseCode_Ok));
}
}
