# tsuserver3, an Attorney Online server
#
# Copyright (C) 2016 argoneus <argoneuscze@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import asyncio
import time
import logging
logger = logging.getLogger('debug')
class MasterServerClient:
"""Advertises information about this server to the master server."""
def __init__(self, server):
self.server = server
self.reader = None
self.writer = None
async def connect(self):
loop = asyncio.get_event_loop()
while True:
try:
self.reader, self.writer = await asyncio.open_connection(
self.server.config['masterserver_ip'],
self.server.config['masterserver_port'],
loop=loop)
await self.handle_connection()
except (ConnectionRefusedError, TimeoutError,
ConnectionResetError, asyncio.IncompleteReadError):
logger.debug('Connection error occurred.')
self.writer = None
self.reader = None
finally:
logger.debug('Retrying MS connection in 30 seconds.')
await asyncio.sleep(30)
async def handle_connection(self):
logger.debug('Master server connected.')
print('Master server connected ({}:{})'.format(
self.server.config['masterserver_ip'],
self.server.config['masterserver_port']))
await self.send_server_info()
ping_timeout = False
last_ping = time.time() - 20
while True:
self.reader.feed_data(b'END')
full_data = await self.reader.readuntil(b'END')
full_data = full_data[:-3]
if len(full_data) > 0:
data_list = list(full_data.split(b'#%'))[:-1]
for data in data_list:
raw_msg = data.decode()
cmd, *args = raw_msg.split('#')
if cmd != 'CHECK' and cmd != 'PONG':
logger.debug(f'Incoming: {raw_msg}')
elif cmd == 'CHECK':
await self.send_raw_message('PING#%')
elif cmd == 'PONG':
ping_timeout = False
elif cmd == 'NOSERV':
logger.debug('MS does not have our server. Readvertising.')
await self.send_server_info()
if time.time() - last_ping > 10:
if ping_timeout:
self.writer.close()
return
last_ping = time.time()
ping_timeout = True
await self.send_raw_message('PING#%')
await asyncio.sleep(1)
async def send_server_info(self):
logger.debug('Advertising to MS')
cfg = self.server.config
port = str(cfg['port'])
if cfg['use_websockets']:
port += '&{}'.format(cfg['websocket_port'])
msg = 'SCC#{}#{}#{}#{}#%'.format(port, cfg['masterserver_name'],
cfg['masterserver_description'],
self.server.software)
await self.send_raw_message(msg)
async def send_raw_message(self, msg):
self.writer.write(msg.encode())
await self.writer.drain()
