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| -rw-r--r-- | .gitignore | 5 | ||||
| -rw-r--r-- | LICENSE | 674 | ||||
| -rw-r--r-- | README.md | 88 | ||||
| -rw-r--r-- | config.py | 20 | ||||
| -rw-r--r-- | lib/YSchat.py | 22 | ||||
| -rw-r--r-- | lib/YSendFlight.py | 6 | ||||
| -rw-r--r-- | lib/YSplayer.py | 27 | ||||
| -rw-r--r-- | lib/parseFlightData.py | 67 | ||||
| -rw-r--r-- | proxy.py | 152 |
9 files changed, 1061 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..35e3958 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +.ipynb_checkpoints/ +__pycache__/ +lib/__pycache__/ +venv/ +flightPacketParser.ipynb @@ -0,0 +1,674 @@ +GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. 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If not, see <https://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Sakuya AC Copyright (C) 2025 Ritabrata Das + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<https://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +<https://www.gnu.org/licenses/why-not-lgpl.html>. diff --git a/README.md b/README.md new file mode 100644 index 0000000..c68744b --- /dev/null +++ b/README.md @@ -0,0 +1,88 @@ +# **Sakuya AC** + +### Perfect and Elegant Anti Cheat your YSFlight server +--- + +## **Features** +- Intercepts and parses network packets to monitor gameplay. +- Detects and logs suspicious activities, like unauthorized modifications. +- Supports multiple simultaneous client connections. +- Easy configuration via `config.py`. + +--- + +## **Getting Started** + +### **Prerequisites** +- Python 3.9+ + +### **Installation** +1. Clone the repository: + ```bash + git clone https://github.com/the-indian-dev/sakuya-ac.git + cd sakuya-ac + ``` + +2. Edit `config.py` to match your server and client setup. + +3. Run the proxy server: + ```bash + python proxy.py + ``` + +--- + +## **Configuration** +All configuration is done via the `config.py` file. Example: + +```python +# config.py +SERVER_HOST = "127.0.0.1" # YSFlight server IP +SERVER_PORT = 7915 # YSFlight server port +PROXY_PORT = 9000 # Port where the proxy listens +``` + +--- + +## **Usage** +1. Point your YSFlight client to the proxy server (e.g., `127.0.0.1:9000`). +2. Monitor logs to view real-time parsing and activity tracking. + +--- +## **TODO :todo:** +1. Add more detection rules. +2. Fix on ground re supply which triggers the cheat detection. +3. Negative g-values are wrong interpeted +4. Add more documentation. +5. Add red smoke emition on death +6. Add radar features +7. Add Plugin API +--- + +## **Contact** +If you have questions, feedback, or suggestions, feel free to reach out to me on Discord: **@theindiandev** + +--- + +## **License** +This project is licensed under the GNU General Public License v3.0. See the [LICENSE](LICENSE) file for details. + +--- + +## **Contributing** +Contributions are welcome! To contribute: +1. Fork the repository. +2. Create a feature branch (`git checkout -b feature-name`). +3. Commit your changes (`git commit -m 'Add some feature'`). +4. Push to the branch (`git push origin feature-name`). +5. Open a pull request. + +--- + +## **Acknowledgments** +- Thanks to Vincet A's work on YS Protocol +- Thanks to my friends at 9th Matrix for helping me out +- Pixel art GIF credit: [Tenor](https://tenor.com/view/sakuemon-pixel-art-touhou-sakuya-maid-gif-27137533). + +--- +:star: Consider giving a star to this repo if you like this project diff --git a/config.py b/config.py new file mode 100644 index 0000000..e95900d --- /dev/null +++ b/config.py @@ -0,0 +1,20 @@ +from logging import DEBUG, WARN, INFO, CRITICAL + +# Configuration +# Logging Level : Most of the times having INFO level is enough +# But while submitting issues, please consider sending the logs with DEBUG level +LOGGING_LEVEL = INFO + +# Server Configuration +# Replace with the YSFlight server address +SERVER_HOST = "127.0.0.1" +SERVER_PORT = 7915 # Please put where the normal YSFlight server is running +# Port for the proxy server +PROXY_PORT = 9000 + +# G Limit (abs(g) >= limit) and the player gets killed +G_LIM = 4 + +# Will appear as message + player name +# eg. Detected health hack by <player name> +HEALTH_HACK_MESSAGE = "Detected for health hack" diff --git a/lib/YSchat.py b/lib/YSchat.py new file mode 100644 index 0000000..fb23208 --- /dev/null +++ b/lib/YSchat.py @@ -0,0 +1,22 @@ +from struct import pack, unpack + +def send(buffer: bytes): + """ + Add to a packet the 'size' information + """ + return pack("I", len(buffer)) + buffer + +def reply(type, buffer:bytes): + """ + Generate packets to send + """ + return send(pack("I", type) + buffer) + +def message(msg: str): + """ + Generate packets for sending messages + """ + decode = "l" + str(len(msg) + 2) + "s" + msg_buffer = bytes(msg, 'utf-8') + buffer = pack(decode, 0, msg_buffer) + return reply(32, buffer) diff --git a/lib/YSendFlight.py b/lib/YSendFlight.py new file mode 100644 index 0000000..c8456cf --- /dev/null +++ b/lib/YSendFlight.py @@ -0,0 +1,6 @@ +from struct import pack +from lib.YSchat import reply + +def endFlight(id: int): + buffer = pack("Ih", id, 0) + return reply(12, buffer) diff --git a/lib/YSplayer.py b/lib/YSplayer.py new file mode 100644 index 0000000..c71f12e --- /dev/null +++ b/lib/YSplayer.py @@ -0,0 +1,27 @@ +class Player: + def __init__(self,username, playerId, x, y, z, throttle, aam, agm, + gunAmmo, rktAmmo, fuel, ipAddr, life, vx, vy, vz, gValue): + self.username = username + self.ip = ipAddr + self.playerId = playerId + self.x = x + self.y = y + self.z = z + self.throttle = throttle + self.aam = aam + self.agm = agm + self.gunAmmo = gunAmmo + self.rktAmmo = rktAmmo + self.fuel = fuel + self.life = life + self.vx = vx + self.vy = vy + self.vz = vz + self.gValue = gValue + + def __str__(self): + return f"Username: {self.username}, IP: {self.ip}, " \ + f"Player ID: {self.playerId}, X: {self.x}, Y: {self.y}, Z: {self.z}, " \ + f"Throttle: {self.throttle}, AAM: {self.aam}, AGM: {self.agm}, " \ + f"Gun Ammo: {self.gunAmmo}, Rocket Ammo: {self.rktAmmo}, Fuel: {self.fuel}" \ + f"Life: {self.life}, gValue: {self.gValue}" diff --git a/lib/parseFlightData.py b/lib/parseFlightData.py new file mode 100644 index 0000000..35aa3b3 --- /dev/null +++ b/lib/parseFlightData.py @@ -0,0 +1,67 @@ +from math import pi +from struct import unpack as up + +# Authored by https://theindiandev.in +# Date : Jan 26 2025 +# Not more than 80 characters per line + +def parseFlightData(data: bytes): + """ + Input : Bytecode, Type 11 datapackets from ysflight server, + do NOT strip the heading(first 8 octets) + Output : tuple + + Tested only on 20150425 version of ysflight + """ + # Assuming version(info1) = 5,4 when speed < 400kts + # version(info1) = 3 when speed > 400kts OR just spawning in the server + version = up("h", data[16:18])[0] + if version == 5 or version == 4: + tRemote = up("f", data[8:12])[0] # Remote Timer from client + playerId = up("I", data[12:16])[0] + x,y,z = up("fff", data[18:30]) + # Heading, Pitch and Bank values are correct but cannot be interepeted + # correctly + # FIXME + h, p, b = up("hhh", data[30:36]) + heading = (h*pi/32768.0) + aoa = (p*pi/32768.0) + bank = (b*pi/32760.0) + vx, vy, vz = up("hhh", data[36:42]) + # FIXME : Unkown padding of 2 bytes, it seems to be from the fuel as a + # integer however correct values only with a short + smokeOil, fuel, payload, _ = up("hhhh", data[48:56]) + flightState, vgw = up("BB", data[56:58]) + gunAmmo, rktAmmo = up("hh", data[62:66]) + # FIXME : aam count incorrect + aam, agm, bomb, life = up("BBBB", data[66:70]) # aam, agm, bomb, life + gValue = (up("B", data[70:71])[0])/10 + throttle, elev, ail, rud, trim, bombBayInfo = up("BBBBBB", data[71:77]) + elif version == 3: + tRemote = up("f", data[8:12])[0] + playerId = up("I", data[12:16])[0] + x,y,z = up("fff", data[20:32]) + h, p, b = up("hhh", data[32:38]) + heading = (h*pi/32768.0) + aoa = (p*pi/32768.0) + bank = (b*pi/32760.0) + vx, vy, vz = up("hhh", data[38:44]) + gValue = (up("h", data[50:52])[0])/100 + gunAmmo, aam, agm, bomb, smokeOil = up("5h", data[52:62]) + fuel, payload = up("2f", data[62:70]) + life = up("h", data[70:72])[0] + flightState, vgw = up("BB", data[72:74]) + throttle, elev, ail, rud, trim = up("B4c", data[80:85]) + rktAmmo = up("h", data[85:87])[0] + bombBayInfo = up("B", data[89:90])[0] + else: + print(f"Unkown version {version}") + print("Payload Dump:") + print(data) + raise ValueError("Unknown version of ysflight") + + + return (tRemote, playerId, x, y, z, heading, aoa, bank, vx, vy, vz, + smokeOil, fuel, payload, flightState, vgw, gunAmmo, rktAmmo, + aam, agm, bomb, life, throttle, elev, ail, rud, trim, + bombBayInfo, gValue) diff --git a/proxy.py b/proxy.py new file mode 100644 index 0000000..83690c2 --- /dev/null +++ b/proxy.py @@ -0,0 +1,152 @@ +""" +Sakuya AC : Perfect and Elegant Proxy for your YSFlight Server +Lisenced under GPLv3 +""" + +import asyncio +from struct import unpack +from lib.parseFlightData import parseFlightData +from lib import YSchat, YSplayer, YSendFlight +import logging +from logging import critical, warn, info, debug +from config import * + +# Configuration +SERVER_HOST = SERVER_HOST +SERVER_PORT = SERVER_PORT +PROXY_PORT = PROXY_PORT +CONNECTED_PLAYERS = [] # List of connected players +logging.basicConfig(level=LOGGING_LEVEL) + +info("Welcome to Sakuya AC") +info("Perfect and Elegant Proxy for your Ysflight Server") +info("Lisenced under GPLv3") + +# Handle client connections +async def handle_client(client_reader, client_writer): + try: + # Connect to the actual server + server_reader, server_writer = await asyncio.open_connection(SERVER_HOST, SERVER_PORT) + peername = client_writer.get_extra_info('peername') + if peername: + ipAddr, clientPort = peername + + async def forward(reader, writer, direction): + while True: + try: + data = await reader.read(4096) + if not data: + break + if direction == "client_to_server": + try: + length, packet_type = unpack("<I I", data[:8]) + debug("C2S" + str(packet_type)) + debug(data) + if packet_type == 11: # Flight data packet + for player in CONNECTED_PLAYERS: + if player.ip == ipAddr: + playerData = parseFlightData(data) + player.playerId = playerData[1] + player.x = playerData[2] + player.y = playerData[3] + player.z = playerData[4] + player.throttle = playerData[22] + player.aam = playerData[18] + player.agm = playerData[19] + player.gunAmmo = playerData[16] + player.rktAmmo = playerData[17] + player.fuel = playerData[12] + player.gValue = playerData[28] + debug(player) + + # Check if health increased + if player.life == -1: + player.life = playerData[21] + # TODO : Remove in production + elif player.life == 0: + debug(data) + elif playerData[21] > player.life: + cheatingMsg = YSchat.message(f"{HEALTH_HACK_MESSAGE} by {player.username}") + writer.write(cheatingMsg) + await writer.drain() + + player.life = playerData[21] + if abs(player.gValue) > G_LIM and player.gValue < 23: # TODO : Add limiter to read from a json file + deathMsg = YSchat.message(f"{player.username}'s G-Force exceeded the limit, gValue = {player.gValue}!") + endPacket = YSendFlight.endFlight(player.playerId) + writer.write(deathMsg) + writer.write(endPacket) + await writer.drain() + break + + # parsed_data = parseFlightData(data) + # tRemote, playerId, x, y, z, *_ = parsed_data + # gunAmmo, rktAmmo, aam, agm, *_ = parsed_data[16:] + # fuel = parsed_data[12] + # throttle = parsed_data[22] + + # Print the parsed flight data + # print(f"Player ID: {playerId}, X: {x}, Y: {y}, Z: {z}, " + # f"Throttle: {throttle}, AAM: {aam}, AGM: {agm}, " + # f"Gun Ammo: {gunAmmo}, Rocket Ammo: {rktAmmo}, Fuel: {fuel}") + elif packet_type == 1: # Connection Request + info("Connection Request") + username = (b''.join(unpack("II16cI", data)[2:16])).decode('ascii').strip('\x00') + playerObject = YSplayer.Player(username, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ipAddr, + -1, -1, -1, -1, 0) + CONNECTED_PLAYERS.append(playerObject) + elif packet_type == 12: # End Flight + for player in CONNECTED_PLAYERS: + if player.ip == ipAddr: + player.playerId = 0 + player.life = -1 + debug("Health resseted to -1") + break + + """ + elif packet_type == 32: # Aircraft list transmission end + print("Aircraft list transmission end") + welcomeMsg = YSchat.message("Welcome to YSFlight Proxy!") + writer.write(welcomeMsg) + await writer.drain() + """ + + except Exception as e: + warn(f"Error parsing flight data: {e}") + else : + length, packet_type = unpack("<I I", data[:8]) + debug("S2C" + str(packet_type)) + debug(data) + + # Forward the packet to the other endpoint + writer.write(data) + await writer.drain() + except (asyncio.CancelledError, ConnectionResetError, BrokenPipeError) as e: + warn(f"Connection error during packet forwarding: {e}") + break + + # Start forwarding data between client and server + await asyncio.gather( + forward(client_reader, server_writer, "client_to_server"), + forward(server_reader, client_writer, "server_to_client"), + ) + except (asyncio.CancelledError, ConnectionResetError, BrokenPipeError) as e: + critical(f"Connection error: {e}") + finally: + try: + client_writer.close() + await client_writer.wait_closed() + except Exception as e: + critical(f"Error closing client connection: {e}") + + +# Start the proxy server +async def start_proxy(): + server = await asyncio.start_server(handle_client, "0.0.0.0", PROXY_PORT) + info(f"Proxy server listening on port {PROXY_PORT}") + async with server: + await server.serve_forever() + + +if __name__ == "__main__": + asyncio.run(start_proxy()) |