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@ -6,264 +6,247 @@ import traceback
@@ -6,264 +6,247 @@ import traceback
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import logging |
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import os |
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from optparse import OptionParser |
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from struct import pack, unpack |
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from struct import pack |
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from time import time |
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from ipaddress import ip_address, ip_network |
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from server_entry import ServerEntry |
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from protocol import MasterProtocol |
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import ipfilter |
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LOG_FILENAME = 'pymaster.log' |
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LOG_FILENAME = "pymaster.log" |
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MAX_SERVERS_FOR_IP = 14 |
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CHALLENGE_SEND_PERIOD = 10 |
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def log(msg): |
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logging.debug(msg) |
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class RateLimitItem: |
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def __init__(self, resetAt): |
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self.reset(resetAt) |
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def reset(self, resetAt): |
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self.resetAt = resetAt |
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self.logs = self.calls = 0 |
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def inc(self): |
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self.calls = self.calls + 1 |
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self.logs = self.logs + 1 |
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def shouldReset(self, curtime): |
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return curtime > self.resetAt |
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class IPRateLimit: |
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def __init__(self, type, period, maxcalls): |
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self.type = type |
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self.period = period |
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self.maxcalls = maxcalls |
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self.maxlogs = maxcalls + 2 |
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self.ips = {} |
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def ratelimit(self, ip): |
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curtime = time() |
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class PyMaster: |
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def __init__(self, ip, port): |
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self.serverList = [] |
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
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self.sock.bind((ip, port)) |
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logging.debug("Welcome to PyMaster!") |
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logging.debug("I ask you again, are you my master? @-@") |
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logging.debug("Running on %s:%d" % (ip, port)) |
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def server_loop(self): |
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data, addr = self.sock.recvfrom(1024) |
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data = data.decode("latin_1") |
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match data[0]: |
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case MasterProtocol.clientQuery: |
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self.client_query(data, addr) |
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case MasterProtocol.challengeRequest: |
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self.send_challenge_to_server(data, addr) |
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case MasterProtocol.addServer: |
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self.add_server_to_list(data, addr) |
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case MasterProtocol.removeServer: |
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self.remove_server_from_list(data, addr) |
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case other: |
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logging.debug("Unknown message: {0} from {1}:{2}".format(data, addr[0], addr[1])) |
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def client_query(self, data, addr): |
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region = data[1] # UNUSED |
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data = data.strip("1" + region) |
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try: |
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query = data.split("\0") |
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except ValueError: |
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logging.debug(traceback.format_exc()) |
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return |
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queryAddr = query[0] # UNUSED |
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rawFilter = query[1] |
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# Remove first \ character |
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rawFilter = rawFilter.strip("\\") |
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split = rawFilter.split("\\") |
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# Use NoneType as undefined |
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gamedir = "valve" # halflife, by default |
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clver = None |
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nat = 0 |
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for i in range(0, len(split), 2): |
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try: |
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key = split[i + 1] |
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if split[i] == "gamedir": |
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gamedir = key.lower() # keep gamedir in lowercase |
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elif split[i] == "nat": |
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nat = int(key) |
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elif split[i] == "clver": |
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clver = key |
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else: |
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logging.debug( |
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"Unhandled info string entry: {0}/{1}. Infostring was: {2}".format( |
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split[i], key, split |
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) |
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) |
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except IndexError: |
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pass |
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if clver is None: # Probably an old vulnerable version |
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self.fake_info_for_old_versions(gamedir, addr) |
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return |
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packet = MasterProtocol.queryPacketHeader |
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for i in self.serverList: |
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if time() > i.die: |
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self.serverList.remove(i) |
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continue |
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if not i.check: |
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continue |
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if nat != i.nat: |
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continue |
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if gamedir is not None and gamedir != i.gamedir: |
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continue |
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if nat: |
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reply = "\xff\xff\xff\xffc {0}:{1}".format(addr[0], addr[1]) |
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data = reply.encode("latin_1") |
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# Tell server to send info reply |
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self.sock.sendto(data, i.addr) |
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# Use pregenerated address string |
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packet += i.queryAddr |
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packet += b"\0\0\0\0\0\0" # Fill last IP:Port with \0 |
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self.sock.sendto(packet, addr) |
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def _send_fake_info(sock, warnmsg, gamedir, addr): |
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baseReply = ( |
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b"\xff\xff\xff\xffinfo\n\host\\" |
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+ warnmsg.encode("utf-8") |
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+ b"\map\\update\dm\\0\\team\\0\coop\\0\\numcl\\32\maxcl\\32\\gamedir\\" |
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+ gamedir.encode("latin-1") |
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+ b"\\" |
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) |
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sock.sendto(baseReply, addr) |
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def fake_info_for_old_versions(self, gamedir, addr): |
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error_message = [ |
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"This version is not", |
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"supported anymore", |
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"Please update Xash3DFWGS", |
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"From GooglePlay or GitHub", |
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"Эта версия", |
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"устарела", |
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"Обновите Xash3DFWGS c", |
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"GooglePlay или GitHub", |
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] |
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for string in error_message: |
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_send_fake_info(self.sock, string, gamedir, addr) |
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def remove_server_from_list(self, addr): |
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for server in self.serverList: |
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if server.addr == addr: |
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logging.debug("Remove Server: from {0}:{1}".format(addr[0], addr[1])) |
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self.serverList.remove(server) |
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def send_challenge_to_server(self, addr): |
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logging.debug("Challenge Request: from {0}:{1}".format(addr[0], addr[1])) |
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# At first, remove old server- data from list |
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# self.removeServerFromList(None, addr) |
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count = 0 |
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for i in self.serverList: |
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if i.addr[0] == addr[0]: |
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if i.addr[1] == addr[1]: |
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self.serverList.remove(i) |
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else: |
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count += 1 |
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if count > MAX_SERVERS_FOR_IP: |
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return |
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challenge = random.randint(0, 2**32 - 1) |
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# Add server to list |
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self.serverList.append(ServerEntry(addr, challenge)) |
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# And send him a challenge |
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packet = MasterProtocol.challengePacketHeader |
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packet += pack("I", challenge) |
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self.sock.sendto(packet, addr) |
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def add_server_to_list(self, data, addr): |
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logging.debug("Add Server: from {0}:{1}".format(addr[0], addr[1])) |
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# Remove the header. Just for better parsing. |
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serverInfo = data.strip("\x30\x0a\x5c") |
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if ip not in self.ips: |
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self.ips[ip] = RateLimitItem(curtime + self.period) |
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elif self.ips[ip].shouldReset(curtime): |
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self.ips[ip].reset(curtime + self.period) |
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# Find a server with same address |
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for serverEntry in self.serverList: |
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if serverEntry.addr == addr: |
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break |
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self.ips[ip].inc() |
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serverEntry.setInfoString(serverInfo) |
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if self.ips[ip].calls > self.maxcalls: |
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if self.ips[ip].logs < self.maxlogs: |
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log('Ratelimited %s %s' % (self.type, ip)) |
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return True |
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return False |
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def spawn_pymaster(verbose, ip, port): |
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if verbose: |
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logging.getLogger().addHandler(logging.StreamHandler()) |
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logging.getLogger().addHandler(logging.FileHandler(LOG_FILENAME)) |
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logging.getLogger().setLevel(logging.DEBUG) |
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class PyMaster: |
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def __init__(self, ip, port): |
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self.serverList = [] |
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self.serverRL = IPRateLimit('server', 60, 30) |
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self.clientRL = IPRateLimit('client', 60, 120) |
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self.ipfilterRL = IPRateLimit('filterlog', 60, 10) |
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
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self.sock.bind((ip, port)) |
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log("Welcome to PyMaster!") |
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log("I ask you again, are you my master?") |
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log("Running on %s:%d" % (ip, port)) |
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def serverLoop(self): |
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data, addr = self.sock.recvfrom(1024) |
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if ip_address(addr[0]) in ipfilter.ipfilter: |
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if not self.ipfilterRL.ratelimit(addr[0]): |
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log('Filter: %s:%d' % (addr[0], addr[1])) |
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return |
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if len(data) == 0: |
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return |
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# only client stuff |
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if data.startswith(MasterProtocol.clientQuery): |
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if not self.clientRL.ratelimit(addr[0]): |
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self.clientQuery(data, addr) |
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return |
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# only server stuff |
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if not self.serverRL.ratelimit(addr[0]): |
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if data.startswith(MasterProtocol.challengeRequest): |
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self.sendChallengeToServer(data, addr) |
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elif data.startswith(MasterProtocol.addServer): |
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self.addServerToList(data, addr) |
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elif data.startswith(MasterProtocol.removeServer): |
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self.removeServerFromList(data, addr) |
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else: |
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log('Unknown message: %s from %s:%d' % (str(data), addr[0], addr[1])) |
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def clientQuery(self, data, addr): |
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data = data.decode('latin_1') |
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data = data.strip('1' + data[1]) |
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info = data.split('\0')[1].strip('\\') |
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split = info.split('\\') |
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protocol = None |
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gamedir = 'valve' |
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clver = None |
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nat = 0 |
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for i in range(0, len(split), 2): |
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try: |
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k = split[i] |
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v = split[i + 1] |
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if k == 'gamedir': |
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gamedir = v.lower() # keep gamedir in lowercase |
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elif k == 'nat': |
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nat = int(v) |
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elif k == 'clver': |
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clver = v |
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elif k == 'protocol': |
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protocol = int(v) |
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# somebody is playing :) |
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elif k == 'thisismypcid' or k == 'heydevelopersifyoureadthis': |
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self.fakeInfoForOldVersions(gamedir, addr) |
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return |
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else: |
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log('Client Query: %s:%d, invalid infostring=%s' % (addr[0], addr[1], rawFilter)) |
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except IndexError: |
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pass |
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if( clver == None ): # Probably an old vulnerable version |
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self.fakeInfoForOldVersions(gamedir, addr) |
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return |
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packet = MasterProtocol.queryPacketHeader |
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for i in self.serverList: |
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if time() > i.die: |
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self.serverList.remove(i) |
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continue |
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if not i.check: |
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continue |
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if nat != i.nat or gamedir != i.gamedir: |
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continue |
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if protocol != None and protocol != i.protocol: |
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continue |
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if nat: |
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# Tell server to send info reply |
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data = ('\xff\xff\xff\xffc %s:%d' % (addr[0], addr[1])).encode('latin_1') |
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self.sock.sendto(data, i.addr) |
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# Use pregenerated address string |
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packet += i.queryAddr |
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packet += b'\0\0\0\0\0\0' # Fill last IP:Port with \0 |
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self.sock.sendto(packet, addr) |
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def fakeInfoForOldVersions(self, gamedir, addr): |
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def sendFakeInfo(sock, warnmsg, gamedir, addr): |
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baseReply = b"\xff\xff\xff\xffinfo\n\host\\" + warnmsg.encode('utf-8') + b"\map\\update\dm\\0\\team\\0\coop\\0\\numcl\\32\maxcl\\32\\gamedir\\" + gamedir.encode('latin-1') + b"\\" |
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sock.sendto(baseReply, addr) |
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sendFakeInfo(self.sock, "This version is not", gamedir, addr) |
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sendFakeInfo(self.sock, "supported anymore", gamedir, addr) |
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sendFakeInfo(self.sock, "Please update Xash3DFWGS", gamedir, addr) |
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sendFakeInfo(self.sock, "From GooglePlay or GitHub", gamedir, addr) |
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sendFakeInfo(self.sock, "Эта версия", gamedir, addr) |
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sendFakeInfo(self.sock, "устарела", gamedir, addr) |
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sendFakeInfo(self.sock, "Обновите Xash3DFWGS c", gamedir, addr) |
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sendFakeInfo(self.sock, "GooglePlay или GitHub", gamedir, addr) |
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def removeServerFromList(self, data, addr): |
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pass |
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def sendChallengeToServer(self, data, addr): |
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count = 0 |
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s = None |
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for i in self.serverList: |
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if addr[0] != i.addr[0]: |
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continue |
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if addr[1] == i.addr[1]: |
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s = i |
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break |
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else: |
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count += 1 |
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if count > MAX_SERVERS_FOR_IP: |
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return |
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challenge2 = None |
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if len(data) == 6: |
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# little endian challenge |
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challenge2 = unpack('<I', data[2:])[0] |
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if not s: |
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challenge = random.randint(0, 2**32-1) & 0xffffffff #hash(addr[0]) + hash(addr[1]) + hash(time()) |
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s = ServerEntry(addr, challenge) |
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self.serverList.append(s) |
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elif s.sentChallengeAt + 5 > time(): |
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return |
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packet = MasterProtocol.challengePacketHeader |
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packet += pack('I', s.challenge) |
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# send server-to-master challenge back |
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if challenge2 is not None: |
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packet += pack('I', challenge2) |
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self.sock.sendto(packet, addr) |
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def addServerToList(self, data, addr): |
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# Remove the header. Just for better parsing. |
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info = data.strip(b'\x30\x0a\x5c').decode('latin_1') |
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# Find a server with same address |
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s = None |
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for s in self.serverList: |
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if s.addr == addr: |
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break |
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if not s: |
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log('Server skipped challenge request: %s:%d' % (addr[0], addr[1])) |
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return |
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if s.setInfoString( info ): |
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log('Add server: %s:%d, game=%s/%s, protocol=%d, players=%d/%d/%d, version=%s' % (addr[0], addr[1], s.gamemap, s.gamedir, s.protocol, s.players, s.bots, s.maxplayers, s.version)) |
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else: |
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log('Failed challenge from %s:%d: %d must be %d' % (addr[0], addr[1], s.challenge, s.challenge2)) |
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masterMain = PyMaster(ip, port) |
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while True: |
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try: |
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masterMain.server_loop() |
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except Exception: |
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logging.debug(traceback.format_exc()) |
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def spawn_pymaster(verbose, ip, port): |
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if verbose: |
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logging.getLogger().addHandler(logging.StreamHandler()) |
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# logging.getLogger().addHandler(logging.FileHandler(LOG_FILENAME)) |
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logging.getLogger().setLevel(logging.DEBUG) |
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masterMain = PyMaster(ip, port) |
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while True: |
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try: |
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masterMain.serverLoop() |
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except Exception: |
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|
log(traceback.format_exc()) |
|
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|
pass |
|
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if __name__ == "__main__": |
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|
parser = OptionParser() |
|
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|
parser.add_option('-i', '--ip', action='store', dest='ip', default='0.0.0.0', |
|
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|
|
help='ip to listen [default: %default]') |
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parser.add_option('-p', '--port', action='store', dest='port', type='int', default=27010, |
|
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help='port to listen [default: %default]') |
|
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parser.add_option('-d', '--daemonize', action='store_true', dest='daemonize', default=False, |
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|
help='run in background, argument is uid [default: %default]') |
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|
parser.add_option('-q', '--quiet', action='store_false', dest='verbose', default=True, |
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|
help='don\'t print to stdout [default: %default]') |
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|
|
(options, args) = parser.parse_args() |
|
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|
|
if options.daemonize != 0: |
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|
|
from daemon import pidfile, DaemonContext |
|
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|
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|
|
with DaemonContext(stdout=sys.stdout, stderr=sys.stderr, working_directory=os.getcwd()) as context: |
|
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|
|
spawn_pymaster(options.verbose, options.ip, options.port) |
|
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|
|
else: |
|
|
|
|
sys.exit(spawn_pymaster(options.verbose, options.ip, options.port)) |
|
|
|
|
|
|
|
|
|
parser = OptionParser() |
|
|
|
|
parser.add_option( |
|
|
|
|
"-i", |
|
|
|
|
"--ip", |
|
|
|
|
action="store", |
|
|
|
|
dest="ip", |
|
|
|
|
default="0.0.0.0", |
|
|
|
|
help="ip to listen [default: %default]", |
|
|
|
|
) |
|
|
|
|
parser.add_option( |
|
|
|
|
"-p", |
|
|
|
|
"--port", |
|
|
|
|
action="store", |
|
|
|
|
dest="port", |
|
|
|
|
type="int", |
|
|
|
|
default=27010, |
|
|
|
|
help="port to listen [default: %default]", |
|
|
|
|
) |
|
|
|
|
parser.add_option( |
|
|
|
|
"-d", |
|
|
|
|
"--daemonize", |
|
|
|
|
action="store_true", |
|
|
|
|
dest="daemonize", |
|
|
|
|
default=False, |
|
|
|
|
help="run in background, argument is uid [default: %default]", |
|
|
|
|
) |
|
|
|
|
parser.add_option( |
|
|
|
|
"-q", |
|
|
|
|
"--quiet", |
|
|
|
|
action="store_false", |
|
|
|
|
dest="verbose", |
|
|
|
|
default=True, |
|
|
|
|
help="don't print to stdout [default: %default]", |
|
|
|
|
) |
|
|
|
|
|
|
|
|
|
(options, args) = parser.parse_args() |
|
|
|
|
|
|
|
|
|
if options.daemonize != 0: |
|
|
|
|
from daemon import DaemonContext |
|
|
|
|
|
|
|
|
|
with DaemonContext( |
|
|
|
|
stdout=sys.stdout, stderr=sys.stderr, working_directory=os.getcwd() |
|
|
|
|
) as context: |
|
|
|
|
spawn_pymaster(options.verbose, options.ip, options.port) |
|
|
|
|
else: |
|
|
|
|
sys.exit(spawn_pymaster(options.verbose, options.ip, options.port)) |
|
|
|
|
|
ghost
11 months ago