More documentation
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@ -1,34 +1,62 @@
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import logging
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import socket
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import threading
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import datetime
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import time
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import traceback
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SERVERS = [{"ip": "136.143.97.184", "port": 19711, "last":datetime.datetime.now()},
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{"ip": "73.181.147.35", "port": 19711, "last": datetime.datetime.now()},
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{"ip": "artolsheim.hipstercat.fr", "port": 19711, "last": datetime.datetime.now()}]
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# List of servers always up
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DEDICATED_SERVERS = [{"ip": "136.143.97.184", "port": 19711, "last": datetime.datetime.now()},
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{"ip": "73.181.147.35", "port": 19711, "last": datetime.datetime.now()},
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{"ip": "artolsheim.hipstercat.fr", "port": 19711, "last": datetime.datetime.now()}]
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SERVERS = DEDICATED_SERVERS.copy()
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def setup_logger(name):
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# setup logger
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_ch = logging.StreamHandler()
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_ch.setLevel("DEBUG")
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_formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
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_ch.setFormatter(_formatter)
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logger = logging.getLogger(name)
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logger.addHandler(_ch)
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logger.setLevel("DEBUG")
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logger.debug("Logger initialized")
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return logger
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logger = setup_logger(__name__)
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def main():
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listen_ip = "0.0.0.0"
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# register socket. dedicated servers send packets to this socket to register.
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registersock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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registersock.bind((listen_ip, 27900))
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print("Listening on", listen_ip, 27900)
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logger.info("Register server listening on %s UDP %s", listen_ip, 27900)
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# query socket. clients use this socket to query available servers.
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querysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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querysock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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querysock.bind((listen_ip, 28900))
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print("Listening on", listen_ip, 28900)
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print("Query server listening on %s TCP %s", listen_ip, 28900)
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querysock.listen(5)
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# everything is threaded.
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registerthread = threading.Thread(target=registerloop, args=(registersock,))
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querythread = threading.Thread(target=queryloop, args=(querysock,))
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# clean thread is used to clean older server that haven't updated in a while
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cleanthread = threading.Thread(target=cleanloop)
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# start everything
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querythread.start()
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registerthread.start()
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cleanthread.start()
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# wait until everything is finished (which will never happen because they are all running in a loop)
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querythread.join()
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registerthread.join()
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cleanthread.join()
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@ -36,8 +64,11 @@ def main():
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def queryloop(querysock):
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while True:
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# new query incoming from a client
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(clientsocket, (_, _)) = querysock.accept()
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print("A new client has come")
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logger.info("Query from %s:%s", clientsocket[0], clientsocket[1])
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# forge the response
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b = b''
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for i in range(len(SERVERS)):
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ip = SERVERS[i]["ip"]
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@ -47,42 +78,57 @@ def queryloop(querysock):
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b += b'\xac'
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b += str(SERVERS[i]["port"]).encode("ascii")
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b += b'\x00'
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print("Sending back", b)
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logger.info("Sending back %s", b.decode('utf8'))
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# send it
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clientsocket.send(b)
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# close the socket
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clientsocket.close()
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def registerloop(registersock):
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while True:
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# new register incoming from a server
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data, (ip, port) = registersock.recvfrom(1024)
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try:
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# first byte is some kind of opcode, so we leave it. the rest is the game port
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gameport = data[1:].decode("ascii")
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if int(gameport):
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# game port sent. now we try to reach the server to avoid registering of servers unreachable.
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tempsocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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tempsocket.settimeout(5)
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# we try to send a "status" packet to the server.
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tempsocket.sendto("\\status\\".encode("ascii"), (ip, port))
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tempsocket.recvfrom(1024)
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# server will be None if it has not been seen before, or something else if it has been seen
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server = next((x for x in SERVERS if x["ip"] == ip and x["port"] == gameport), None)
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if not server:
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SERVERS.append({"ip": ip, "port": gameport, "last": datetime.datetime.now()})
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print("New server: %s:%s" % (ip, gameport))
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logger.info("New server: %s:%s" % (ip, gameport))
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else:
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server["last"] = datetime.datetime.now()
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print("Keepalive from: %s:%s" % (ip, gameport))
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logger.info("Keepalive from: %s:%s" % (ip, gameport))
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tempsocket.close()
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else:
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# server sent shit, discard it
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print("Fuck it, wasn't int: ", data)
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except Exception as e:
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# something wrong happened but we don't know what
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print("Exception")
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traceback.print_exc()
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def cleanloop():
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# clean loop removes servers that haven't registered or sent a packet in the last 2 minutes
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# but don't remove known dedicated servers
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while True:
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now = datetime.datetime.now()
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for server in SERVERS:
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if now > server["last"] + datetime.timedelta(minutes=2):
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if server["ip"] == "136.143.97.184" or server["ip"] == "73.181.147.35" or server["ip"] == "artolsheim.hipstercat.fr":
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# do not remove usual dedicated servers
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continue
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print("Deleting %s:%s" % (server["ip"], server["port"]))
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if now > server["last"] + datetime.timedelta(minutes=2) and server not in DEDICATED_SERVERS:
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logger.info("Deleting %s:%s" % (server["ip"], server["port"]))
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try:
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SERVERS.remove(server)
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except ValueError:
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@ -91,4 +137,4 @@ def cleanloop():
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if __name__ == '__main__':
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main()
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main()
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