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Client.py
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Client.py
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import socket, time, sys, ip2country, errno
from collections import defaultdict
from BaseClient import BaseClient
class Client(BaseClient):
'this object represents one server-side connected client'
def __init__(self, root, address, session_id):
'initial setup for the connected client'
self._root = root
# detects if the connection is from this computer
if address[0].startswith('127.'):
if root.online_ip:
address = (root.online_ip, address[1])
elif root.local_ip:
address = (root.local_ip, address[1])
self.ip_address = address[0]
self.local_ip = address[0]
self.port = address[1]
self.country_code = '??'
self.setFlagByIP(self.ip_address)
self.session_id = session_id
self.db_id = -1
self.static = False
self.sendError = False
self.msg_id = ''
self.msg_sendbuffer = []
self.sendingmessage = ''
## time-stamps for encrypted data
self.incoming_msg_ctr = 0
self.outgoing_msg_ctr = 1
## note: this NEVER becomes false after LOGIN!
self.logged_in = False
self.status = 12
self.is_ingame = False
self.cpu = 0
self.access = 'fresh'
self.accesslevels = ['fresh','everyone']
self.battle_bots = {}
self.current_battle = None
self.battle_bans = []
self.ingame_time = 0
self.went_ingame = 0
self.spectator = False
self.battlestatus = {'ready':'0', 'id':'0000', 'ally':'0000', 'mode':'0', 'sync':'00', 'side':'00', 'handicap':'0000000'}
self.teamcolor = '0'
## copies of the DB User values, set on successful LOGIN
self.set_user_pwrd_salt("", ("", ""))
self.email = ''
self.hostport = None
self.udpport = 0
self.bot = 0
self.floodlimit = {
'fresh':{'msglength':1024*32, 'bytespersecond':1024*32, 'seconds':2},
'user':{'msglength':1024*32, 'bytespersecond':1024*32, 'seconds':10},
'bot':{'msglength':1024, 'bytespersecond':10000, 'seconds':5},
'mod':{'msglength':10000, 'bytespersecond':10000, 'seconds':10},
'admin':{'msglength':10000, 'bytespersecond':100000, 'seconds':10},
}
self.msg_length_history = {}
self.lastsaid = {}
self.debug = False
self.data = ''
# holds compatibility flags - will be set by Protocol as necessary
self.compat = defaultdict(lambda: False)
self.scriptPassword = None
now = time.time()
self.last_login = now
self.failed_logins = 0
self.register_date = now
self.lastdata = now
self.last_id = 0
self.buffersend = False # write all sends to a buffer (used when a client is logging in but didn't receive full server state)
self.buffer = ""
self.ignored = {}
self.channels = set()
def set_msg_id(self, msg):
self.msg_id = ""
if (not msg.startswith('#')):
return msg
test = msg.split(' ')[0][1:]
if (not test.isdigit()):
return msg
self.msg_id = '#%s ' % test
return (' '.join(msg.split(' ')[1:]))
def setFlagByIP(self, ip, force=True):
cc = ip2country.lookup(ip)
if force or cc != '??':
self.country_code = cc
##
## handle data from client
##
def Handle(self, data):
if (self.access in self.floodlimit):
msg_limits = self.floodlimit[self.access]
else:
msg_limits = self.floodlimit['user']
now = int(time.time())
self.lastdata = now # data received, store time to detect disconnects
bytespersecond = msg_limits['bytespersecond']
seconds = msg_limits['seconds']
if (now in self.msg_length_history):
self.msg_length_history[now] += len(data)
else:
self.msg_length_history[now] = len(data)
total = 0
for iter in dict(self.msg_length_history):
if (iter < now - (seconds - 1)):
del self.msg_length_history[iter]
else:
total += self.msg_length_history[iter]
if total > (bytespersecond * seconds):
if not self.access in ('admin', 'mod'):
if (self.bot != 1):
# FIXME: no flood limit for these atm, need to do server-side shaping/bandwith limiting
self.Send('SERVERMSG No flooding (over %s per second for %s seconds)' % (bytespersecond, seconds))
self.Remove('Kicked for flooding (%s)' % (self.access))
return
## keep appending until we see at least one newline
self.data += data
## if too much data has accumulated without a newline, clear
if (len(self.data) > (msg_limits['msglength'] * 32)):
del self.data; self.data = ""; return
if (self.data.count('\n') == 0):
return
self.HandleProtocolCommands(self.data.split("\n"), msg_limits)
def HandleProtocolCommand(self, cmd):
## probably caused by trailing newline ("abc\n".split("\n") == ["abc", ""])
if (len(cmd) < 1):
return
self._root.protocol._handle(self, cmd)
def HandleProtocolCommands(self, split_data, msg_limits):
assert(type(split_data) == list)
assert(type(split_data[-1]) == str)
msg_length_limit = msg_limits['msglength']
check_msg_limits = (not ('disabled' in msg_limits))
## either a list of commands, or a list of encrypted data
## blobs which may contain embedded (post-decryption) NLs
##
## note: will be empty if len(split_data) == 1
raw_data_blobs = split_data[: len(split_data) - 1]
## will be a single newline in most cases, or an incomplete
## command which should be saved for a later time when more
## data is in buffer
self.data = split_data[-1]
commands_buffer = []
def check_message_timestamp(msg):
ctr = str_to_int32(msg)
if (ctr <= self.incoming_msg_ctr):
return False
self.incoming_msg_ctr = ctr
return True
for raw_data_blob in raw_data_blobs:
if (len(raw_data_blob) == 0):
continue
## strips leading spaces and trailing carriage returns
strip_commands = [(raw_data_blob.rstrip('\r')).lstrip(' ')]
commands_buffer += strip_commands
for command in commands_buffer:
if (check_msg_limits and (len(command) > msg_length_limit)):
self.Send('SERVERMSG message-length limit (%d) exceeded: command \"%s...\" dropped.' % (msg_length_limit, command[0: 8]))
else:
self.HandleProtocolCommand(command)
##
## send data to client
##
def RealSend(self, data):
## don't append new data to buffer when client gets removed
if not data:
return
self.transport.write(data.encode("utf-8") + b"\n")
def Send(self, data):
if self.msg_id:
data = self.msg_id + data
if self.buffersend:
self.buffer += data + "\n"
else:
self.RealSend(data)
def flushBuffer(self):
self.transport.write(self.buffer.encode("utf-8"))
self.buffer = ""
self.buffersend = False
def isAdmin(self):
return ('admin' in self.accesslevels)
def isMod(self):
return self.isAdmin() or ('mod' in self.accesslevels) # maybe cache these