dolphin/Source/Core/InputCommon/ControllerInterface/DualShockUDPClient/DualShockUDPProto.h

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// Copyright 2019 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include <cstring>
#include <optional>
#include <zlib.h>
#include "Common/CommonTypes.h"
namespace ciface::DualShockUDPClient::Proto
{
// CemuHook DualShockUDP protocol implementation using UdpServer.cs from
// https://github.com/Ryochan7/DS4Windows as documentation.
//
// WARNING: Little endian host assumed
constexpr u16 CEMUHOOK_PROTOCOL_VERSION = 1001;
constexpr int PORT_COUNT = 4;
constexpr std::array<u8, 4> CLIENT{'D', 'S', 'U', 'C'};
constexpr std::array<u8, 4> SERVER{'D', 'S', 'U', 'S'};
#pragma pack(push, 1)
enum class DsState : u8
{
Disconnected = 0x00,
Reserved = 0x01,
Connected = 0x02
};
enum class DsConnection : u8
{
None = 0x00,
Usb = 0x01,
Bluetooth = 0x02
};
enum class DsModel : u8
{
None = 0,
PartialGyro = 1,
FullGyro = 2,
Generic = 3
};
enum class DsBattery : u8
{
None = 0x00,
Dying = 0x01,
Low = 0x02,
Medium = 0x03,
High = 0x04,
Full = 0x05,
Charging = 0xEE,
Charged = 0xEF
};
enum RegisterFlags : u8
{
AllPads = 0x00,
PadID = 0x01,
PadMACAdddress = 0x02
};
struct MessageHeader
{
std::array<u8, 4> source;
u16 protocol_version;
u16 message_length; // actually message size minus header size
u32 crc32;
u32 source_uid;
};
struct Touch
{
u8 active;
u8 id;
s16 x;
s16 y;
};
namespace MessageType
{
struct VersionRequest
{
static constexpr auto FROM = CLIENT;
static constexpr auto TYPE = 0x100000U;
MessageHeader header;
u32 message_type;
};
struct VersionResponse
{
static constexpr auto FROM = SERVER;
static constexpr auto TYPE = 0x100000U;
MessageHeader header;
u32 message_type;
u16 max_protocol_version;
std::array<u8, 2> padding;
};
struct ListPorts
{
static constexpr auto FROM = CLIENT;
static constexpr auto TYPE = 0x100001U;
MessageHeader header;
u32 message_type;
u32 pad_request_count;
std::array<u8, 4> pad_ids;
};
struct PortInfo
{
static constexpr auto FROM = SERVER;
static constexpr auto TYPE = 0x100001U;
MessageHeader header;
u32 message_type;
u8 pad_id;
DsState pad_state;
DsModel model;
DsConnection connection_type;
std::array<u8, 6> pad_mac_address;
DsBattery battery_status;
u8 padding;
};
struct PadDataRequest
{
static constexpr auto FROM = CLIENT;
static constexpr auto TYPE = 0x100002U;
MessageHeader header;
u32 message_type;
RegisterFlags register_flags;
u8 pad_id_to_register;
std::array<u8, 6> mac_address_to_register;
};
struct PadDataResponse
{
static constexpr auto FROM = SERVER;
static constexpr auto TYPE = 0x100002U;
MessageHeader header;
u32 message_type;
u8 pad_id;
DsState pad_state;
DsModel model;
DsConnection connection_type;
std::array<u8, 6> pad_mac_address;
DsBattery battery_status;
u8 active;
u32 hid_packet_counter;
u8 button_states1;
u8 button_states2;
u8 button_ps;
u8 button_touch;
u8 left_stick_x;
u8 left_stick_y_inverted;
u8 right_stick_x;
u8 right_stick_y_inverted;
u8 button_dpad_left_analog;
u8 button_dpad_down_analog;
u8 button_dpad_right_analog;
u8 button_dpad_up_analog;
u8 button_square_analog;
u8 button_cross_analog;
u8 button_circle_analog;
u8 button_triangle_analog;
u8 button_r1_analog;
u8 button_l1_analog;
u8 trigger_r2;
u8 trigger_l2;
Touch touch1;
Touch touch2;
u64 accelerometer_timestamp_us;
float accelerometer_x_g;
float accelerometer_y_g;
float accelerometer_z_g;
float gyro_pitch_deg_s;
float gyro_yaw_deg_s;
float gyro_roll_deg_s;
};
struct FromServer
{
union
{
struct
{
MessageHeader header;
u32 message_type;
};
MessageType::VersionResponse version_response;
MessageType::PortInfo port_info;
MessageType::PadDataResponse pad_data_response;
};
};
struct FromClient
{
union
{
struct
{
MessageHeader header;
u32 message_type;
};
MessageType::VersionRequest version_request;
MessageType::ListPorts list_ports;
MessageType::PadDataRequest pad_data_request;
};
};
} // namespace MessageType
static inline u32 CRC32(const void* buffer, unsigned length)
{
return crc32(crc32(0L, Z_NULL, 0), static_cast<const Bytef*>(buffer), length);
}
template <typename MsgType>
struct Message
{
Message() = default;
explicit Message(u32 source_uid)
{
m_message.header.source = MsgType::FROM;
m_message.header.protocol_version = CEMUHOOK_PROTOCOL_VERSION;
m_message.header.message_length = sizeof(*this) - sizeof(m_message.header);
m_message.header.source_uid = source_uid;
m_message.message_type = MsgType::TYPE;
}
void Finish() { m_message.header.crc32 = CRC32(&m_message, sizeof(m_message)); }
template <class ToMsgType>
std::optional<ToMsgType> CheckAndCastTo()
{
const u32 crc32_in_header = m_message.header.crc32;
// zero out the crc32 in the packet once we got it since that's whats needed for calculation
m_message.header.crc32 = 0;
const u32 crc32_calculated = CRC32(&m_message, sizeof(ToMsgType));
if (crc32_in_header != crc32_calculated)
{
NOTICE_LOG_FMT(
CONTROLLERINTERFACE,
"DualShockUDPClient Received message with bad CRC in header: got {:08x}, expected {:08x}",
crc32_in_header, crc32_calculated);
return std::nullopt;
}
if (m_message.header.protocol_version > CEMUHOOK_PROTOCOL_VERSION)
return std::nullopt;
if (m_message.header.source != ToMsgType::FROM)
return std::nullopt;
if (m_message.message_type != ToMsgType::TYPE)
return std::nullopt;
if (m_message.header.message_length + sizeof(m_message.header) > sizeof(ToMsgType))
return std::nullopt;
ToMsgType tomsg;
memcpy(&tomsg, &m_message, sizeof(tomsg));
return tomsg;
}
MsgType m_message{};
};
#pragma pack(pop)
} // namespace ciface::DualShockUDPClient::Proto