Rearrange Link Play module

- Try to ensure thread safety by using TCP socket

latest version/linkplay_server/__init__.py

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+from .main import link_play

latest version/linkplay_server/aes.py

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+from os import urandom
+from cryptography.hazmat.primitives.ciphers import (
+    Cipher, algorithms, modes
+)
+
+
+def encrypt(key, plaintext, associated_data):
+    iv = urandom(12)
+    encryptor = Cipher(
+        algorithms.AES(key),
+        modes.GCM(iv, min_tag_length=12),
+    ).encryptor()
+    encryptor.authenticate_additional_data(associated_data)
+    ciphertext = encryptor.update(plaintext) + encryptor.finalize()
+    return (iv, ciphertext, encryptor.tag)
+
+
+def decrypt(key, associated_data, iv, ciphertext, tag):
+    decryptor = Cipher(
+        algorithms.AES(key),
+        modes.GCM(iv, tag, min_tag_length=12),
+    ).decryptor()
+    decryptor.authenticate_additional_data(associated_data)
+    return decryptor.update(ciphertext) + decryptor.finalize()

latest version/linkplay_server/config.py

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+from telnetlib import AUTHENTICATION
+
+
+class Config:
+    '''
+        Link Play server configuration
+    '''
+
+    '''
+        服务器地址、端口号、校验码
+        Server address, port and verification code
+    '''
+    HOST = '0.0.0.0'
+    UDP_PORT = 10900
+    TCP_PORT = 10901
+    AUTHENTICATION = 'my_link_play_server'
+    '''
+    --------------------------------------------------
+    '''
+
+    TIME_LIMIT = 3600000
+
+    COMMAND_INTERVAL = 1000000
+
+    COUNTDOWM_TIME = 3999
+
+    PLAYER_PRE_TIMEOUT = 3000000
+    PLAYER_TIMEOUT = 20000000
+
+    LINK_PLAY_UNLOCK_LENGTH = 512

latest version/linkplay_server/main.py

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+import base64
+import random
+import socketserver
+import threading
+import time
+from os import urandom
+
+# import binascii
+from .aes import decrypt, encrypt
+from .config import Config
+from .udp_class import Player, Room, bi
+from .udp_parser import CommandParser
+
+# token: {'key': key, 'room': Room, 'player_index': player_index, 'player_id': player_id}
+link_play_data = {}
+room_id_dict = {}  # 'room_id': Room
+room_code_dict = {}  # 'room_code': Room
+player_dict = {}  # 'player_id' : Player
+clean_timer = 0
+lock = threading.RLock()
+
+
+def random_room_code():
+    # 随机生成房间号
+    re = ''
+    for _ in range(4):
+        re += chr(random.randint(65, 90))
+    for _ in range(2):
+        re += str(random.randint(0, 9))
+
+    return re
+
+
+def unique_random(dataset, length=8, random_func=None):
+    '''无重复随机，且默认非0'''
+    if random_func is None:
+        x = bi(urandom(length))
+        while x in dataset or x == 0:
+            x = bi(urandom(length))
+    else:
+        x = random_func()
+        while x in dataset:
+            x = random_func()
+    return x
+
+
+def clear_player(token):
+    # 清除玩家信息和token
+    del player_dict[link_play_data[token]['player_id']]
+    del link_play_data[token]
+
+
+def clear_room(room):
+    # 清除房间信息
+    room_id = room.room_id
+    room_code = room.room_code
+    del room_id_dict[room_id]
+    del room_code_dict[room_code]
+    del room
+
+
+def memory_clean(now):
+    # 内存清理
+    lock.acquire()
+
+    clean_room_list = []
+    clean_player_list = []
+    for token in link_play_data:
+        room = link_play_data[token]['room']
+        if now - room.timestamp >= Config.TIME_LIMIT:
+            clean_room_list.append(room.room_id)
+
+        if now - room.players[link_play_data[token]['player_index']].last_timestamp // 1000 >= Config.TIME_LIMIT:
+            clean_player_list.append(token)
+
+    for room_id in room_id_dict:
+        if now - room_id_dict[room_id].timestamp >= Config.TIME_LIMIT:
+            clean_room_list.append(room_id)
+
+    for room_id in clean_room_list:
+        if room_id in room_id_dict:
+            clear_room(room_id_dict[room_id])
+
+    for token in clean_player_list:
+        clear_player(token)
+
+    lock.release()
+
+
+class UDP_handler(socketserver.BaseRequestHandler):
+    def handle(self):
+        client_msg, server = self.request
+        try:
+            token = client_msg[:8]
+            iv = client_msg[8:20]
+            tag = client_msg[20:32]
+            ciphertext = client_msg[32:]
+            if int.from_bytes(token, byteorder='little') in link_play_data:
+                user = link_play_data[bi(token)]
+            else:
+                return None
+
+            plaintext = decrypt(user['key'], b'', iv, ciphertext, tag)
+        except Exception as e:
+            print(e)
+            return None
+        # print(binascii.b2a_hex(plaintext))
+
+        commands = CommandParser(
+            user['room'], user['player_index']).get_commands(plaintext)
+
+        if user['room'].players[user['player_index']].player_id == 0:
+            clear_player(bi(token))
+            temp = []
+            for i in commands:
+                if i[:3] == b'\x06\x16\x12':
+                    temp.append(i)
+            commands = temp
+            # 处理不能正确被踢的问题
+
+        for i in commands:
+            iv, ciphertext, tag = encrypt(user['key'], i, b'')
+            # print(binascii.b2a_hex(i))
+
+            server.sendto(token + iv + tag[:12] +
+                          ciphertext, self.client_address)
+
+
+class TCP_handler(socketserver.StreamRequestHandler):
+    def handle(self):
+        self.data = self.rfile.readline().strip()
+
+        message = self.data.decode('utf-8')
+        # print(message)
+        data = message.split('|')
+        if data[0] != Config.AUTHENTICATION:
+            self.wfile.write(b'No authentication')
+            return None
+
+        global clean_timer
+        now = round(time.time() * 1000)
+        if now - clean_timer >= Config.TIME_LIMIT:
+            clean_timer = now
+            memory_clean(now)
+
+        self.wfile.write(data_swap(data[1:]).encode('utf-8'))
+
+
+def data_swap(data: list) -> str:
+    # data: list[str] = [command, ...]
+    if data[0] == '1':
+        # 开房
+        # data = ['1', name, song_unlock, ]
+        # song_unlock: base64 str
+        name = data[1]
+        song_unlock = base64.b64decode(data[2])
+
+        key = urandom(16)
+        room_id = unique_random(room_id_dict)
+
+        room = Room()
+        room.room_id = room_id
+        room_id_dict[room_id] = room
+
+        player_id = unique_random(player_dict, 3)
+        player = Player()
+        player.player_id = player_id
+        player.set_player_name(name)
+        player_dict[player_id] = player
+
+        player.song_unlock = song_unlock
+        room.song_unlock = song_unlock
+        room.host_id = player_id
+        room.players[0] = player
+        room.player_num = 1
+
+        room_code = unique_random(room_code_dict, random_func=random_room_code)
+        room.room_code = room_code
+        room_code_dict[room_code] = room
+
+        token = room_id
+        player.token = token
+
+        link_play_data[token] = {'key': key,
+                                 'room': room,
+                                 'player_index': 0,
+                                 'player_id': player_id}
+
+        return '|'.join([str(x) for x in (0, room_code, room_id, token, base64.b64encode(key).decode('utf-8'), player_id)])
+
+    elif data[0] == '2':
+        # 入房
+        # data = ['2', name, song_unlock, room_code]
+        # song_unlock: base64 str
+        room_code = data[3].upper()
+
+        if room_code not in room_code_dict:
+            # 房间号错误
+            return '1202'
+
+        room = room_code_dict[room_code]
+        if room.player_num == 4:
+            # 满人
+            return '1201'
+        elif room.state != 2:
+            # 无法加入
+            return '1205'
+
+        name = data[1]
+        song_unlock = base64.b64decode(data[2])
+
+        key = urandom(16)
+        token = unique_random(link_play_data)
+        player_id = unique_random(player_dict, 3)
+
+        player = Player()
+        player.player_id = player_id
+        player.set_player_name(name)
+        player.token = token
+        player_dict[player_id] = player
+        player.song_unlock = song_unlock
+        room.update_song_unlock()
+        for i in range(4):
+            if room.players[i].player_id == 0:
+                room.players[i] = player
+                player_index = i
+                break
+        link_play_data[token] = {'key': key,
+                                 'room': room,
+                                 'player_index': player_index,
+                                 'player_id': player_id}
+
+        return '|'.join([str(x) for x in (0, room_code, room.room_id, token, base64.b64encode(key).decode('utf-8'), player_id, base64.b64encode(room.song_unlock).decode('utf-8'))])
+
+    elif data[0] == '3':
+        # 房间信息更新
+        # data = ['3', token]
+        token = int(data[1])
+        if token in link_play_data:
+            r = link_play_data[token]
+            return '|'.join([str(x) for x in (0, r['room'].room_code, r['room'].room_id, base64.b64encode(r['key']).decode('utf-8'), r['room'].players[r['player_index']].player_id, base64.b64encode(r['room'].song_unlock).decode('utf-8'))])
+        else:
+            return '108'
+
+
+def link_play(ip: str = Config.HOST, udp_port: int = Config.UDP_PORT, tcp_port: int = Config.TCP_PORT):
+    udp_server = socketserver.ThreadingUDPServer((ip, udp_port), UDP_handler)
+    tcp_server = socketserver.ThreadingTCPServer((ip, tcp_port), TCP_handler)
+
+    threads = [threading.Thread(target=udp_server.serve_forever), threading.Thread(
+        target=tcp_server.serve_forever)]
+    [t.start() for t in threads]
+    [t.join() for t in threads]

latest version/linkplay_server/udp_class.py

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+from .config import Config
+
+
+def b(value, length=1):
+    return value.to_bytes(length=length, byteorder='little')
+
+
+def bi(value):
+    return int.from_bytes(value, byteorder='little')
+
+
+class Player:
+    def __init__(self) -> None:
+        self.player_id = 0
+        self.player_name = b'\x45\x6d\x70\x74\x79\x50\x6c\x61\x79\x65\x72\x00\x00\x00\x00\x00'
+        self.token = 0
+
+        self.character_id = 0xff
+        self.last_character_id = 0xff
+        self.is_uncapped = 0
+
+        self.difficulty = 0xff
+        self.last_difficulty = 0xff
+        self.score = 0
+        self.last_score = 0
+        self.timer = 0
+        self.last_timer = 0
+        self.cleartype = 0
+        self.last_cleartype = 0
+        self.best_score_flag = 0
+        self.best_player_flag = 0
+        self.finish_flag = 0
+
+        self.player_state = 1
+        self.download_percent = 0
+        self.online = 0
+
+        self.last_timestamp = 0
+        self.extra_command_queue = []
+
+        self.song_unlock: bytes = b'\x00' * Config.LINK_PLAY_UNLOCK_LENGTH
+
+        self.start_command_num = 0
+
+    def set_player_name(self, player_name: str):
+        self.player_name = player_name.encode('ascii')
+        if len(self.player_name) > 16:
+            self.player_name = self.player_name[:16]
+        else:
+            self.player_name += b'\x00' * (16 - len(self.player_name))
+
+
+class Room:
+    def __init__(self) -> None:
+        self.room_id = 0
+        self.room_code = 'AAAA00'
+
+        self.countdown = 0xffffffff
+        self.timestamp = 0
+        self.state = 0
+        self.song_idx = 0xffff
+        self.last_song_idx = 0xffff
+
+        self.song_unlock = b'\x00' * Config.LINK_PLAY_UNLOCK_LENGTH
+
+        self.host_id = 0
+        self.players = [Player(), Player(), Player(), Player()]
+        self.player_num = 0
+
+        self.interval = 1000
+        self.times = 100
+
+        self.round_switch = 0
+
+        self.command_queue = []
+        self.command_queue_length = 0
+
+    def get_players_info(self):
+        # 获取所有玩家信息
+        re = b''
+        for i in self.players:
+            re += b(i.player_id, 8) + b(i.character_id) + b(i.is_uncapped) + b(i.difficulty) + b(i.score, 4) + \
+                b(i.timer, 4) + b(i.cleartype) + b(i.player_state) + \
+                b(i.download_percent) + b(i.online) + b'\x00' + i.player_name
+        return re
+
+    def get_player_last_score(self):
+        # 获取上次曲目玩家分数，返回bytes
+        if self.last_song_idx == 0xffff:
+            return b'\xff\xff\x00\x00\x00\x00\x00\x00\x00' * 4
+        re = b''
+
+        for i in range(4):
+            player = self.players[i]
+
+            if player.player_id != 0:
+                re += b(player.last_character_id) + b(player.last_difficulty) + b(player.last_score, 4) + b(
+                    player.last_cleartype) + b(player.best_score_flag) + b(player.best_player_flag)
+            else:
+                re += b'\xff\xff\x00\x00\x00\x00\x00\x00\x00'
+
+        return re
+
+    def make_round(self):
+        # 轮换房主
+        for i in range(4):
+            if self.players[i].player_id == self.host_id:
+                for j in range(1, 4):
+                    if self.players[(i + j) % 4].player_id != 0:
+                        self.host_id = self.players[(i + j) % 4].player_id
+                        break
+                break
+
+    def delete_player(self, player_index: int):
+        # 删除某个玩家
+        self.player_num -= 1
+        if self.players[player_index].player_id == self.host_id:
+            self.make_round()
+
+        self.players[player_index].online = 0
+        self.players[player_index] = Player()
+        self.update_song_unlock()
+
+    def update_song_unlock(self):
+        # 更新房间可用歌曲
+        r = bi(b'\xff' * Config.LINK_PLAY_UNLOCK_LENGTH)
+        for i in self.players:
+            if i.player_id != 0:
+                r &= bi(i.song_unlock)
+
+        self.song_unlock = b(r, Config.LINK_PLAY_UNLOCK_LENGTH)
+
+    def is_ready(self, old_state: int, player_state: int):
+        # 是否全部准备就绪
+        if self.state == old_state:
+            for i in self.players:
+                if i.player_id != 0 and (i.player_state != player_state or i.online == 0):
+                    return False
+
+            return True
+        else:
+            return False
+
+    def is_finish(self):
+        # 是否全部进入结算
+        if self.state == 8:
+            return False
+
+        for i in self.players:
+            if i.player_id != 0 and (i.finish_flag == 0 or i.online == 0):
+                return False
+
+        return True
+
+    def make_finish(self):
+        # 结算
+        self.state = 8
+        self.last_song_idx = self.song_idx
+
+        max_score = 0
+        max_score_i = []
+        for i in range(4):
+            player = self.players[i]
+            if player.player_id != 0:
+                player.finish_flag = 0
+                player.last_timer = player.timer
+                player.last_score = player.score
+                player.last_cleartype = player.cleartype
+                player.last_character_id = player.character_id
+                player.last_difficulty = player.difficulty
+                player.best_player_flag = 0
+
+                if player.last_score > max_score:
+                    max_score = player.last_score
+                    max_score_i = [i]
+                elif player.last_score == max_score:
+                    max_score_i.append(i)
+
+        for i in max_score_i:
+            self.players[i].best_player_flag = 1

latest version/linkplay_server/udp_parser.py

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+import time
+
+from .udp_class import Room, bi
+from .config import Config
+from .udp_sender import CommandSender
+
+
+class CommandParser:
+    def __init__(self, room: Room, player_index: int = 0) -> None:
+        self.room = room
+        self.player_index = player_index
+
+    def get_commands(self, command):
+        self.command = command
+        l = {b'\x06\x16\x01': self.command_01,
+             b'\x06\x16\x02': self.command_02,
+             b'\x06\x16\x03': self.command_03,
+             b'\x06\x16\x04': self.command_04,
+             b'\x06\x16\x05': self.command_05,
+             b'\x06\x16\x06': self.command_06,
+             b'\x06\x16\x07': self.command_07,
+             b'\x06\x16\x08': self.command_08,
+             b'\x06\x16\x09': self.command_09,
+             b'\x06\x16\x0a': self.command_0a,
+             b'\x06\x16\x0b': self.command_0b
+             }
+        r = l[command[:3]]()
+
+        re = []
+
+        flag_13 = False
+        for i in range(max(bi(self.command[12:16]), self.room.players[self.player_index].start_command_num), self.room.command_queue_length):
+            if self.room.command_queue[i][:3] == b'\x06\x16\x13':
+                if flag_13:
+                    break
+                flag_13 = True
+            re.append(self.room.command_queue[i])
+
+        if self.room.players[self.player_index].extra_command_queue:
+            re += self.room.players[self.player_index].extra_command_queue
+            self.room.players[self.player_index].extra_command_queue = []
+
+        if r:
+            re += r
+
+        return re
+
+    def command_01(self):
+        # 给房主
+        player_id = bi(self.command[24:32])
+        for i in self.room.players:
+            if i.player_id == player_id and i.online == 1:
+                self.room.host_id = player_id
+
+        x = CommandSender(self.room)
+        x.random_code = self.command[16:24]
+        self.room.command_queue_length += 1
+        self.room.command_queue.append(x.command_10())
+
+        return None
+
+    def command_02(self):
+        x = CommandSender(self.room)
+        x.random_code = self.command[16:24]
+        song_idx = bi(self.command[24:26])
+
+        flag = 2
+        if self.room.state == 2:
+            flag = 0
+            self.room.state = 3
+            self.room.song_idx = song_idx
+            self.room.command_queue_length += 1
+            self.room.command_queue.append(x.command_11())
+            self.room.command_queue_length += 1
+            self.room.command_queue.append(x.command_13())
+
+        return [x.command_0d(flag)]
+
+    def command_03(self):
+        # 尝试进入结算
+        x = CommandSender(self.room)
+        x.random_code = self.command[16:24]
+        player = self.room.players[self.player_index]
+        player.score = bi(self.command[24:28])
+        player.cleartype = self.command[28]
+        player.difficulty = self.command[29]
+        player.best_score_flag = self.command[30]
+        player.finish_flag = 1
+        player.last_timestamp -= Config.COMMAND_INTERVAL
+        self.room.last_song_idx = self.room.song_idx
+
+        self.room.command_queue_length += 1
+        self.room.command_queue.append(x.command_12(self.player_index))
+
+        if self.room.is_finish():
+            self.room.make_finish()
+            self.room.command_queue_length += 1
+            self.room.command_queue.append(x.command_13())
+
+        return None
+
+    def command_04(self):
+        # 踢人
+        x = CommandSender(self.room)
+        x.random_code = self.command[16:24]
+        player_id = bi(self.command[24:32])
+        flag = 2
+        if self.room.players[self.player_index].player_id == self.room.host_id and player_id != self.room.host_id:
+            for i in range(4):
+                if self.room.players[i].player_id == player_id:
+                    flag = 1
+                    self.room.delete_player(i)
+                    self.room.command_queue_length += 1
+                    self.room.command_queue.append(x.command_12(i))
+                    self.room.update_song_unlock()
+                    self.room.command_queue_length += 1
+                    self.room.command_queue.append(x.command_14())
+                    break
+
+        return [x.command_0d(flag)]
+
+    def command_05(self):
+        pass
+
+    def command_06(self):
+        x = CommandSender(self.room)
+        x.random_code = self.command[16:24]
+        self.room.state = 1
+        self.room.song_idx = 0xffff
+
+        self.room.command_queue_length += 1
+        self.room.command_queue.append(x.command_13())
+        return None
+
+    def command_07(self):
+        x = CommandSender(self.room)
+        x.random_code = self.command[16:24]
+        self.room.players[self.player_index].song_unlock = self.command[24:536]
+        self.room.update_song_unlock()
+
+        self.room.command_queue_length += 1
+        self.room.command_queue.append(x.command_14())
+        return None
+
+    def command_08(self):
+        self.room.round_switch = bi(self.command[24:25])
+        x = CommandSender(self.room)
+        x.random_code = self.command[16:24]
+        self.room.command_queue_length += 1
+        self.room.command_queue.append(x.command_13())
+
+        return None
+
+    def command_09(self):
+        re = []
+        x = CommandSender(self.room)
+        x.random_code = self.command[16:24]
+        player = self.room.players[self.player_index]
+
+        if bi(self.command[12:16]) == 0:
+            player.online = 1
+            self.room.state = 1
+            self.room.update_song_unlock()
+            player.start_command_num = self.room.command_queue_length
+            self.room.command_queue_length += 1
+            self.room.command_queue.append(x.command_15())
+        else:
+            if x.timestamp - player.last_timestamp >= Config.COMMAND_INTERVAL:
+                re.append(x.command_0c())
+                player.last_timestamp = x.timestamp
+
+            flag_13 = False
+            # 离线判断
+            for i in range(4):
+                if i != self.player_index:
+                    t = self.room.players[i]
+                    if t.player_id != 0:
+                        if t.last_timestamp != 0:
+                            if t.online == 1 and x.timestamp - t.last_timestamp >= Config.PLAYER_PRE_TIMEOUT:
+                                t.online = 0
+                                self.room.command_queue_length += 1
+                                self.room.command_queue.append(x.command_12(i))
+                            elif t.online == 0 and x.timestamp - t.last_timestamp >= Config.PLAYER_TIMEOUT:
+                                self.room.delete_player(i)
+                                self.room.command_queue_length += 1
+                                self.room.command_queue.append(x.command_12(i))
+                                flag_13 = True
+
+            flag_11 = False
+            flag_12 = False
+
+            if player.online == 0:
+                flag_12 = True
+                player.online = 1
+
+            if self.room.is_ready(1, 1):
+                flag_13 = True
+                self.room.state = 2
+
+            if player.player_state != self.command[32]:
+                flag_12 = True
+                player.player_state = self.command[32]
+
+            if player.difficulty != self.command[33] and player.player_state != 5 and player.player_state != 6 and player.player_state != 7 and player.player_state != 8:
+                flag_12 = True
+                player.difficulty = self.command[33]
+
+            if player.cleartype != self.command[34] and player.player_state != 7 and player.player_state != 8:
+                flag_12 = True
+                player.cleartype = self.command[34]
+
+            if player.download_percent != self.command[35]:
+                flag_12 = True
+                player.download_percent = self.command[35]
+
+            if player.character_id != self.command[36]:
+                flag_12 = True
+                player.character_id = self.command[36]
+
+            if player.is_uncapped != self.command[37]:
+                flag_12 = True
+                player.is_uncapped = self.command[37]
+
+            if self.room.state == 3 and player.score != bi(self.command[24:28]):
+                flag_12 = True
+                player.score = bi(self.command[24:28])
+
+            if self.room.is_ready(3, 4):
+                flag_13 = True
+                self.room.countdown = Config.COUNTDOWM_TIME
+                self.room.timestamp = round(time.time() * 1000)
+                self.room.state = 4
+
+            if self.room.state == 4 or self.room.state == 5 or self.room.state == 6:
+                timestamp = round(time.time() * 1000)
+                self.room.countdown -= timestamp - self.room.timestamp
+                self.room.timestamp = timestamp
+                if self.room.state == 4 and self.room.countdown <= 0:
+                    # 此处不清楚
+                    self.room.state = 5
+                    self.room.countdown = 5999
+                    flag_11 = True
+                    flag_13 = True
+
+                if self.room.state == 5 and self.room.is_ready(5, 6):
+                    self.room.state = 6
+                    flag_13 = True
+
+                if self.room.state == 5 and self.room.is_ready(5, 7):
+                    self.room.state = 7
+                    self.room.countdown = 0xffffffff
+                    flag_13 = True
+
+                if self.room.state == 5 and self.room.countdown <= 0:
+                    print('我怎么知道这是啥')
+
+                if self.room.state == 6 and self.room.countdown <= 0:
+                    # 此处不清楚
+                    self.room.state = 7
+                    self.room.countdown = 0xffffffff
+                    flag_13 = True
+
+                if self.room.countdown <= 0:
+                    self.room.countdown = 0
+
+            if self.room.state == 7 or self.room.state == 8:
+                if player.timer < bi(self.command[28:32]) or bi(self.command[28:32]) == 0 and player.timer != 0:
+                    player.last_timer = player.timer
+                    player.last_score = player.score
+                    player.timer = bi(self.command[28:32])
+                    player.score = bi(self.command[24:28])
+
+                if player.timer != 0 or self.room.state != 8:
+                    for i in self.room.players:
+                        i.extra_command_queue.append(
+                            x.command_0e(self.player_index))
+
+                if self.room.is_ready(8, 1):
+                    flag_13 = True
+                    self.room.state = 1
+                    self.room.song_idx = 0xffff
+                    if self.room.round_switch == 1:
+                        self.room.make_round()
+
+                    for i in self.room.players:
+                        i.timer = 0
+                        i.score = 0
+
+                if self.room.is_finish():
+                    # 有人退房导致的结算
+                    self.room.make_finish()
+                    flag_13 = True
+
+            if flag_11:
+                self.room.command_queue_length += 1
+                self.room.command_queue.append(x.command_11())
+            if flag_12:
+                self.room.command_queue_length += 1
+                self.room.command_queue.append(x.command_12(self.player_index))
+            if flag_13:
+                self.room.command_queue_length += 1
+                self.room.command_queue.append(x.command_13())
+
+        return re
+
+    def command_0a(self):
+        # 退出房间
+        self.room.delete_player(self.player_index)
+
+        x = CommandSender(self.room)
+        self.room.command_queue_length += 1
+        self.room.command_queue.append(x.command_12(self.player_index))
+
+        if self.room.state == 3 or self.room.state == 2:
+            self.room.state = 1
+            self.room.song_idx = 0xffff
+        # self.room.command_queue_length += 1
+        # self.room.command_queue.append(x.command_11())
+        self.room.command_queue_length += 1
+        self.room.command_queue.append(x.command_13())
+        self.room.command_queue_length += 1
+        self.room.command_queue.append(x.command_14())
+        return None
+
+    def command_0b(self):
+        # 推荐歌曲
+        song_idx = bi(self.command[16:18])
+        x = CommandSender(self.room)
+        for i in range(4):
+            if self.player_index != i and self.room.players[i].online == 1:
+                self.room.players[i].extra_command_queue.append(
+                    x.command_0f(self.player_index, song_idx))
+
+        return None

latest version/linkplay_server/udp_sender.py

@@ -0,0 +1,46 @@
+import time
+from .udp_class import Room, b
+
+
+class CommandSender:
+    def __init__(self, room: Room = Room()) -> None:
+        self.room = room
+        self.timestamp = round(time.time() * 1000000)
+
+        self.random_code = b'\x11\x11\x11\x11\x00\x00\x00\x00'
+
+    def command_0c(self):
+        return b'\x06\x16\x0c\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + self.random_code + b(self.room.state) + b(self.room.countdown, 4) + b(self.timestamp, 8) + b'\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b'
+
+    def command_0d(self, code: int):
+        return b'\x06\x16\x0d\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + self.random_code + b(code) + b'\x07\x07\x07\x07\x07\x07\x07'
+
+    def command_0e(self, player_index: int):
+        # 分数广播
+        player = self.room.players[player_index]
+        return b'\x06\x16\x0e\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + b(player.player_id, 8) + b(player.character_id) + b(player.is_uncapped) + b(player.difficulty) + b(player.score, 4) + b(player.timer, 4) + b(player.cleartype) + b(player.player_state) + b(player.download_percent) + b'\x01' + b(player.last_score, 4) + b(player.last_timer, 4) + b(player.online)
+
+    def command_0f(self, player_index: int, song_idx: int):
+        # 歌曲推荐
+        player = self.room.players[player_index]
+        return b'\x06\x16\x0f\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + b(player.player_id, 8) + b(song_idx, 2) + b'\x06\x06\x06\x06\x06\x06'
+
+    def command_10(self):
+        # 房主宣告
+        return b'\x06\x16\x10\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + self.random_code + b(self.room.host_id, 8)
+
+    def command_11(self):
+        return b'\x06\x16\x11\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + self.random_code + self.room.get_players_info() + b'\x08\x08\x08\x08\x08\x08\x08\x08'
+
+    def command_12(self, player_index: int):
+        player = self.room.players[player_index]
+        return b'\x06\x16\x12\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + self.random_code + b(player_index) + b(player.player_id, 8) + b(player.character_id) + b(player.is_uncapped) + b(player.difficulty) + b(player.score, 4) + b(player.timer, 4) + b(player.cleartype) + b(player.player_state) + b(player.download_percent) + b(player.online)
+
+    def command_13(self):
+        return b'\x06\x16\x13\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + self.random_code + b(self.room.host_id, 8) + b(self.room.state) + b(self.room.countdown, 4) + b(self.timestamp, 8) + b(self.room.song_idx, 2) + b(self.room.interval, 2) + b(self.room.times, 7) + self.room.get_player_last_score() + b(self.room.last_song_idx, 2) + b(self.room.round_switch, 1) + b'\x01'
+
+    def command_14(self):
+        return b'\x06\x16\x14\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + self.random_code + self.room.song_unlock + b'\x08\x08\x08\x08\x08\x08\x08\x08'
+
+    def command_15(self):
+        return b'\x06\x16\x15\x09' + b(self.room.room_id, 8) + b(self.room.command_queue_length, 4) + self.room.get_players_info() + self.room.song_unlock + b(self.room.host_id, 8) + b(self.room.state) + b(self.room.countdown, 4) + b(self.timestamp, 8) + b(self.room.song_idx, 2) + b(self.room.interval, 2) + b(self.room.times, 7) + self.room.get_player_last_score() + b(self.room.last_song_idx, 2) + b(self.room.round_switch, 1) + b'\x09\x09\x09\x09\x09\x09\x09\x09\x09'