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raket.py
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raket.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# main.py
#
# Copyright 2020 Alvarito050506 <donfrutosgomez@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
#
import sys
import struct
import time
from rak import RakNet
server_prefix = "MCCPP;Demo;";
server_name = "Raket Server";
server_id = b"\x00\x00\x00\x00\x00\x1f\x10\x00";
server_port = 19134;
entities = 0;
queue = bytes();
raknet = RakNet();
def decode_packet(data):
try:
if data[4] == 0x00:
packet = {
"iteration": (data[1] & 0xff) | ((data[2] & 0xff) << 8) | ((data[3] & 0xff) << 16),
"encapsulation": data[4],
"length": int(struct.unpack("!H", data[5:7])[0] / 8),
"id": data[7],
"data": data[8:-1] + bytes([data[-1]]),
"error": None
};
elif data[4] == 0x40:
packet = {
"iteration": (data[1] & 0xff) | ((data[2] & 0xff) << 8) | ((data[3] & 0xff) << 16),
"encapsulation": data[4],
"length": int(struct.unpack("!H", data[5:7])[0] / 8),
"count": (data[7] & 0xff) | ((data[8] & 0xff) << 8) | ((data[9] & 0xff) << 16),
"id": data[10],
"data": data[11:-1] + bytes([data[-1]]),
"error": None
};
elif data[4] == 0x60:
packet = {
"iteration": (data[1] & 0xff) | ((data[2] & 0xff) << 8) | ((data[3] & 0xff) << 16),
"encapsulation": data[4],
"length": int(struct.unpack("!H", data[5:7])[0] / 8),
"count": (data[7] & 0xff) | ((data[8] & 0xff) << 8) | ((data[9] & 0xff) << 16),
"id": data[14],
"data": data[15:-1] + bytes([data[-1]]),
"error": None
};
else:
packet = {
"error": "invalid"
};
except IndexError:
packet = {
"error": "invalid"
};
return packet;
def encode_packet(encapsulation, id, data, iterations, count = None):
packet = bytes();
template = b"\x84" + bytes([iterations & 0xff]) + bytes([(iterations >> 8) & 0xff]) + bytes([(iterations >> 16) & 0xff]) + bytes([encapsulation]) + struct.pack("!H", (len(data) + 1) * 8);
if encapsulation == 0x00:
packet = template + bytes([id]) + data;
elif encapsulation == 0x40:
assert count is not None, "Count not set"
packet = template + bytes([count & 0xff]) + bytes([(count >> 8) & 0xff]) + bytes([(count >> 16) & 0xff]) + bytes([id]) + data;
elif encapsulation == 0x60:
assert count is not None, "Count not set"
packet = template + bytes([count & 0xff]) + bytes([(count >> 8) & 0xff]) + bytes([(count >> 16) & 0xff]) + b"\x00\x00\x00\x00" + bytes([id]) + data;
return packet;
def encode_pos(pos):
# x, y, z
return struct.pack("!f", 128 + pos[0]) + struct.pack("!f", 64 + pos[1]) + struct.pack("!f", 128 + pos[2]);
def decode_pos(pos):
return [struct.unpack("!f", pos[:4])[0] - 128, struct.unpack("!f", pos[4:8])[0] - 64, struct.unpack("!f", pos[8:12])[0] - 128];
def encode_string(data):
return struct.pack("!H", len(data)) + bytes(data, "utf-8");
def encode_pitch_yaw(pitch_yaw):
return struct.pack("!H", pitch_yaw[0]) + struct.pack("!H", pitch_yaw[1]);
def decode_pitch_yaw(pitch_yaw):
return [struct.unpack("!H", pitch_yaw[:2])[0], struct.unpack("!H", pitch_yaw[2:4])[0]];
def broadcast(data, ex=set()):
for i in raknet.get_addrs():
uid = raknet.get_uid(i);
if not uid in ex and raknet.players[uid]["entity_id"] != None:
new_packet = b"\x84" + bytes([raknet.players[uid]["iterations"]]) + data[2:];
raknet.sendto(new_packet, i);
plus(uid, new_packet);
return 0;
def spawn_entities(addr):
uid = raknet.get_uid(addr);
new_packet = encode_packet(0x00, 0x89, raknet.players[uid]["client_id"] + encode_string(raknet.players[uid]["username"]) + struct.pack("!I", raknet.players[uid]["entity_id"]) + encode_pos([0, 4, 0]) + b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" + b"\x00\x00\x00\x00\x00\x00\x00\x00\x7f" + b"\x00", 0);
broadcast(new_packet, [uid]);
for i in raknet.players:
print(i);
if i != uid:
new_packet = encode_packet(0x00, 0x89, raknet.players[i]["client_id"] + encode_string(raknet.players[i]["username"]) + struct.pack("!I", raknet.players[i]["entity_id"]) + encode_pos(raknet.players[i]["pos"]) + encode_pitch_yaw(raknet.players[i]["pitch_yaw"]) + b"\x00\x00\x00\x00\x00\x00\x00\x00" + b"\x00\x00\x00\x00\x00\x00\x00\x00\x7f" + b"\x00", 0);
raknet.sendto(new_packet, addr);
plus(uid, new_packet);
new_packet = encode_packet(0x00, 0x85, encode_string("Welcome to " + server_name + ", " + raknet.players[uid]["username"] + "!"), raknet.players[uid]["iterations"]);
raknet.sendto(new_packet, addr);
return 0;
def plus(uid, packet):
raknet.players[uid]["last_packet"] = packet;
raknet.players[uid]["iterations"] += 1;
def handler(data, addr, socket):
global entities;
global queue;
uid = raknet.get_uid(addr);
if data[0] == 0xa0:
old_packet = decode_packet(raknet.players[uid]["last_packet"]);
if old_packet["error"] == None:
raknet.sendto(encode_packet(0x00, old_packet["id"], old_packet["data"], raknet.players[uid]["iterations"]), addr);
else:
raknet.sendto(raknet.players[uid]["last_packet"], addr);
else:
packet = decode_packet(data);
new_packet = None;
if packet["id"] != 0x00:
new_packet = b"\xc0\x00\x01\x01" + bytes([packet["iteration"] & 0xff]) + bytes([(packet["iteration"] >> 8) & 0xff]) + bytes([(packet["iteration"] >> 16) & 0xff]);
socket.sendto(new_packet, addr);
if packet["id"] == 0x09:
raknet.players[uid]["session"] = data[-8:];
new_packet = encode_packet(0x00, 0x10, b"\x04\x3f\x57\xfe\xcd" + struct.pack("!H", server_port) + b"\x00\x00\x04\xf5\xff\xff\xf5\x00\x00\x04\xff\xff\xff\xff\x00\x00\x04\xff\xff\xff\xff\x00\x00\x04\xff\xff\xff\xff\x00\x00\x04\xff\xff\xff\xff\x00\x00\x04\xff\xff\xff\xff\x00\x00\x04\xff\xff\xff\xff\x00\x00\x04\xff\xff\xff\xff\x00\x00\x04\xff\xff\xff\xff\x00\x00\x04\xff\xff\xff\xff\x00\x00" + raknet.players[uid]["session"] + b"\x00\x00\x00\x00\x04\x44\x0b\xa9", raknet.players[uid]["iterations"]);
socket.sendto(new_packet, addr);
elif packet["id"] == 0x82:
username = packet["data"][2:2 + struct.unpack("!H", packet["data"][:2])[0]].decode("utf-8");
raknet.players[uid]["username"] = username;
new_packet = encode_packet(0x60, 0x83, b"\x00\x00\x00\x00", raknet.players[uid]["iterations"], raknet.players[uid]["count"]);
raknet.players[uid]["count"] += 1
socket.sendto(new_packet, addr);
plus(uid, new_packet);
new_packet = encode_packet(0x60, 0x87, b"\x01\x02\x03\x04\x00\x00\x00\x00\x00\x00\x00\x01" + struct.pack("!I", entities + 1) + encode_pos([0, 4, 0]), raknet.players[uid]["iterations"], raknet.players[uid]["count"]);
raknet.players[uid]["count"] += 1
socket.sendto(new_packet, addr);
entities += 1;
raknet.players[uid]["entity_id"] = entities;
elif packet["id"] == 0x84:
if packet["data"][0] == 0x01:
spawn_entities(addr);
elif packet["id"] == 0x94:
if uid in raknet.players and struct.unpack("!I", packet["data"][:4])[0] == raknet.players[uid]["entity_id"]:
broadcast(data, [uid]);
raknet.players[uid]["pos"] = decode_pos(packet["data"][4:16]);
raknet.players[uid]["pitch_yaw"] = decode_pitch_yaw(packet["data"][16:20]);
elif packet["id"] == 0x15:
del raknet.players[uid];
elif packet["id"] == 0x00 and packet["encapsulation"] == 0x40:
try:
new_packet = encode_packet(0x00, 0x86, struct.pack("!l", 0x00), raknet.players[uid]["iterations"]);
socket.sendto(new_packet, addr);
except:
pass;
if new_packet != None and uid in raknet.players:
plus(uid, new_packet);
return 0;
def main(args):
raknet.set_option("name", server_prefix + server_name);
raknet.set_option("id", server_id);
raknet.set_option("port", server_port);
raknet.set_option("custom_packets", [0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0xa0]);
raknet.set_option("custom_handler", handler);
# Uncomment this to enable ("verbose") debugging:
# raknet.set_option("debug", True);
try:
raknet.run();
except KeyboardInterrupt:
return 0;
if __name__ == '__main__':
sys.exit(main(sys.argv));