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server.py
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"""
Main game server based on TCP TLS
"""
import sys
import ssl
import json
import random
import socket
import select
import hashlib
import sha256_hashsummer
from datetime import datetime
from network import prepare_object_to_sending, get_current_timestamp
from constants import SERVER_PORT, SERVER_IP, ENCODING, RUNES_CONFIG,\
BEGIN_FLAG, END_FLAG, SHOOT_SAVE_DURATION
NO_VALIDATION = '--no-validation' in sys.argv
class Server:
def __init__(self):
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
# context.load_cert_chain('tbc_cert.pem', 'tbc_key.pem')
context.load_cert_chain('certificate.pem')
self.sock = context.wrap_socket(self.sock, server_side=True)
#self.sock = ssl.wrap_socket(self.sock, server_side=True, certfile="tbc_cert.pem", keyfile="tbc_key.pem")
self.sock.bind((SERVER_IP, SERVER_PORT))
self.sock.listen(5)
self.inputs = [self.sock]
self.outputs = []
self.sessions = {}
self.players_data = {}
self.unconfirmed_connections = {}
print('binded')
def accept_connection(self, s):
conn, addr = s.accept()
conn.setblocking(0)
self.inputs.append(conn)
self.unconfirmed_connections[addr] = random.randint(1, 10**10)
print(f'{addr} is connected')
def disconnect(self, s):
if s in self.outputs:
self.outputs.remove(s)
self.inputs.remove(s)
s.shutdown(socket.SHUT_RDWR)
s.close()
if s in self.players_data:
del self.players_data[s]
def remove_player_from_sessions(self, s):
for session in self.sessions:
if s in self.sessions[session]['players_data']:
del self.sessions[session]['players_data'][s]
spawn_index = self.sessions[session]['spawns'].index(s)
self.set_session_spawns_and_scores(session, spawn_index)
break
def get_sessions_info(self):
sessions_info = []
for session in self.sessions:
info = {"session_id":session, "players_online":len(self.sessions[session]["players_data"]),
"max_players":self.sessions[session]['max_players'], 'level':self.sessions[session]['level']}
if 'password' in self.sessions[session]:
info['password'] = self.sessions[session]['password']
sessions_info.append(info)
return sessions_info
def create_session(self, data):
session = json.loads(data.split('create_session')[1]) # "create_session{'session_id', 'bla', ...}"
session['players_data'] = {}
session['runes'] = {'runes':{hashlib.shake_128(str(random.randint(1, 10**21)).encode()).hexdigest(6):{'is_placed':False, 'coords':i} for i in session['runes']}, 'timer':datetime.now()} # is_palace takes rune type, wether rune is placed
session['creation_time'] = datetime.now()
session['spawns'] = [True] * session['max_players']
session['scores'] = {}
session['shoots'] = {} # {datetime.timestamp}
self.sessions[session['session_id']] = session
def send_data(self, sock, data:bytes):
sock.send(BEGIN_FLAG + data + END_FLAG)
def check_player_files_validation(self, s, data):
addr = s.getpeername()
if addr in self.unconfirmed_connections:
if 'confirmation_response' in data:
recieved_hash = data.split(' ')[1]
real_hash = sha256_hashsummer.sum_files_with_extention(solt=self.unconfirmed_connections[addr])
if recieved_hash == real_hash or NO_VALIDATION:
self.send_data(s, prepare_object_to_sending('success'))
print(addr, 'confirmed')
del self.unconfirmed_connections[addr]
else:
print(addr, 'unconfirmed')
self.send_data(s, prepare_object_to_sending('failed'))
elif 'confirmation_request' in data:
with open('sha256_hashsummer.py', 'r') as f:
cmd = f.read()
f.close()
self.send_data(s, prepare_object_to_sending(f'{cmd}\nself.confirmation_result = sum_files_with_extention(solt={self.unconfirmed_connections[addr]})\n'))
else:
self.send_data(s, prepare_object_to_sending('Confirm your files before continue'))
return False
return True
def connect_player_to_session(self, s):
self.players_data[s] = json.loads(self.players_data[s])
session_id = self.players_data[s]['session_id']
if self.players_data[s]['reason'] == 'observing':
self.send_data(s, prepare_object_to_sending({'level':self.sessions[session_id]['level'], 'session_id':session_id, 'observing':1}))
elif session_id in self.sessions:
if len(self.sessions[session_id]['players_data']) < self.sessions[session_id]['max_players']:
spawn_index = random.choice([i for i in range(len(self.sessions[session_id]['spawns'])) if self.sessions[session_id]['spawns'][i] == True])
self.sessions[session_id]['spawns'][spawn_index] = s
self.sessions[session_id]['scores'][spawn_index] = 0
self.send_data(s, prepare_object_to_sending({'spawn_index':spawn_index, 'level':self.sessions[session_id]['level'], 'session_id':session_id}))
else:
self.send_data(s, prepare_object_to_sending('overflowed'))
else:
self.send_data(s, prepare_object_to_sending('There is no such session'))
def collect_other_players_data(self, s):
data = []
for key in self.sessions[self.players_data[s]['session_id']]['players_data']:
if key != s:
data.append(self.sessions[self.players_data[s]['session_id']]['players_data'][key])
else:
data.append(self.sessions[self.players_data[s]['session_id']]['scores'][self.sessions[self.players_data[s]['session_id']]['spawns'].index(s)])
return data
def get_availible_runes(self, session_id):
return [{'rune':self.sessions[session_id]['runes']['runes'][i]['is_placed'], 'coords':self.sessions[session_id]['runes']['runes'][i]['coords'], 'id':i} for i in self.sessions[session_id]['runes']['runes'] if self.sessions[session_id]['runes']['runes'][i]['is_placed'] != False]
def process_players_data(self, s):
player_info = {}
self.players_data[s] = json.loads(self.players_data[s])
session_id = self.players_data[s]['session_id']
if 'killer' in self.players_data[s]['player_data']:
self.sessions[self.players_data[s]['session_id']]['scores'][self.players_data[s]['player_data']['killer']] += 1
if 'rune_collected' in self.players_data[s]['player_data']:
collected_rune = self.players_data[s]['player_data']['rune_collected']
if collected_rune in self.sessions[session_id]['runes']['runes'] and self.sessions[session_id]['runes']['runes'][collected_rune]['is_placed'] != False:
player_info['rune_collected'] = self.sessions[session_id]['runes']['runes'][collected_rune]['is_placed']
self.sessions[session_id]['runes']['runes'][collected_rune]['is_placed'] = False
if self.players_data[s]['player_data']['shouted']['state']:
timestamp = str(get_current_timestamp())
self.players_data[s]['player_data']['shouted']['id'] = self.players_data[s]['player_data']['id']
self.sessions[session_id]['shoots'][timestamp] = self.players_data[s]['player_data']['shouted']
self.sessions[session_id]['shoots'][timestamp]['timestamp'] = float(timestamp)
player_info['runes'] = self.get_availible_runes(session_id)
self.sessions[session_id]['players_data'][s] = self.players_data[s]['player_data']
self.sessions[session_id]['players_data'][s]['address'] = f"{s.getpeername()[0]}:{s.getpeername()[1]}" # ip:port
self.sessions[session_id]['players_data'][s]['connection_time'] = datetime.now().timestamp()
self.sessions[session_id]['players_data'][s]['score'] = self.sessions[session_id]['scores'][self.players_data[s]['player_data']['spawn_index']]
data = {'other_players':self.collect_other_players_data(s), 'player_info':player_info, 'timestamp':get_current_timestamp(),
'shoots':self.sessions[session_id]['shoots']}
self.send_data(s, prepare_object_to_sending(data))
def process_observing(self, s):
self.players_data[s] = json.loads(self.players_data[s])
if self.players_data[s]['session_id'] in self.sessions:
self.send_data(s, prepare_object_to_sending({'other_players':self.collect_other_players_data(s), 'player_info':{'runes':self.get_availible_runes(self.players_data[s]['session_id'])}}))
else:
self.send_data(s, prepare_object_to_sending('value_error'))
def check_expired_players_and_sessions(self):
sessions_rm = []
for session in self.sessions:
tm_stamp = datetime.now().timestamp()
players_rm = []
for player in self.sessions[session]['players_data']:
if tm_stamp - self.sessions[session]['players_data'][player]['connection_time'] >= 5:
players_rm.append(player)
for player in players_rm:
del self.sessions[session]['players_data'][player]
spawn_index = self.sessions[session]['spawns'].index(player)
self.set_session_spawns_and_scores(session, spawn_index)
if len(self.sessions[session]['players_data']) == 0:
if (datetime.now() - self.sessions[session]['creation_time']).total_seconds() >= 20:
sessions_rm.append(session)
for session in sessions_rm:
del self.sessions[session]
def set_session_spawns_and_scores(self, session, index):
self.sessions[session]['spawns'][index] = True
self.sessions[session]['scores'][index] = 0
def update_sessions(self):
now = datetime.now()
for session in self.sessions:
if (now - self.sessions[session]['runes']['timer']).total_seconds() >= RUNES_CONFIG['spawn_timer']:
self.sessions[session]['runes']['timer'] = now
availible_spots = [i for i in self.sessions[session]['runes']['runes'] if self.sessions[session]['runes']['runes'][i]['is_placed'] == False]
if availible_spots:
self.sessions[session]['runes']['runes'][random.choice(availible_spots)]['is_placed'] = random.choice(RUNES_CONFIG['runes'])
del_names = []
for shoot in self.sessions[session]['shoots']:
if get_current_timestamp() - float(shoot) >= SHOOT_SAVE_DURATION:
del_names.append(shoot)
for name in del_names:
del self.sessions[session]['shoots'][name]
def main(self):
while self.inputs:
self.iteration = 1
self.readable, self.writable, self.exceptional = select.select(self.inputs, self.outputs, self.inputs)
for s in self.readable:
if s == self.sock:
#if len(self.players_data) >= 4:
# continue
try:
self.accept_connection(s)
except:
continue
else:
try:
data = s.recv(1024)
except:
self.disconnect(s)
continue
if data:
#print(f'Recieved {data.decode("utf-8")} | from {s.getpeername()[0]}:{s.getpeername()[1]}')
data = data.decode(ENCODING)
addr = s.getpeername()
if not self.check_player_files_validation(s, data):
continue
if 'create_session' in data:
self.create_session(data)
else:
self.players_data[s] = data
if s not in self.outputs:
self.outputs.append(s)
else:
self.disconnect(s)
for s in self.writable:
if s in self.outputs:
self.outputs.remove(s)
if self.players_data[s] == 'get_sessions_info':
self.remove_player_from_sessions(s)
self.send_data(s, prepare_object_to_sending(self.get_sessions_info()))
elif 'connect_to_session' in self.players_data[s]:
self.connect_player_to_session(s)
elif 'player_data' in self.players_data[s]:
self.process_players_data(s)
elif 'observing' in self.players_data[s]:
self.process_observing(s)
for s in self.exceptional:
self.disconnect(s)
self.update_sessions()
self.check_expired_players_and_sessions()
self.iteration += 1
try:
Server().main()
except KeyboardInterrupt:
exit()
except Exception as e:
print(e)
input()