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@ -1,4 +1,5 @@
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import math
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import math, socket, ssl, select, time, threading, random, string
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from datetime import datetime
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EOC = "\0"
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@ -7,6 +8,57 @@ def to_numeric(identifier):
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def to_identifier(numeric):
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return chr(int(math.floor(numeric / 255) + 1)) + chr((numeric % 255) + 1)
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def remove_from_list(ls, val):
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return [value for value in ls if value is not val]
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class PingThread(threading.Thread):
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def __init__(self, channel):
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self.channel = channel
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threading.Thread.__init__(self)
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self.daemon = True
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def run(self):
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while True:
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self.pingkey = ''.join(random.choice(string.letters + string.digits) for i in xrange(5))
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self.pingtime = datetime.time(datetime.now())
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self.channel.send("PING %s" % self.pingkey)
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time.sleep(10)
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class Client:
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buff = ""
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channel_map = {}
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handshake_status = 0
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version = 1.0
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def __init__(self, connstream):
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self.stream = connstream
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self.channel_map[0] = Channel(self, ControlHandler(self))
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def start_handshake(self):
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self.handshake_status = 1
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self.channel_map[0].send("OHAI")
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def process_data(self, data):
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self.buff += data
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stack = self.buff.split(EOC)
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self.buff = stack.pop()
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for chunk in stack:
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self.process_chunk(chunk)
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def process_chunk(self, chunk):
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if len(chunk) > 2:
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channel_identifier = chunk[:2]
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data = chunk[2:]
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channel_numeric = to_numeric(channel_identifier)
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if channel_numeric in self.channel_map:
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self.channel_map[channel_numeric].process_chunk(data)
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else:
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print "WARNING: Received data on non-existent channel %d" % channel_numeric
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class Channel:
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numeric = 0
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@ -26,9 +78,134 @@ class Channel:
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self.client.stream.send(to_identifier(self.numeric) + data + EOC)
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class Handler:
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client = None
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channel = None
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def __init__(self, client):
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self.client = client
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def process(self, chunk):
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pass
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class ControlHandler(Handler):
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pingthread = None
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def process(self, chunk):
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target = self.client.channel_map[0]
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if chunk == "OHAI":
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self.client.handshake_status = 1
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target.send("HITHAR")
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elif chunk == "HITHAR":
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self.client.handshake_status = 2
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target.send("VERSION %d" % self.client.version)
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elif chunk[:7] == "VERSION":
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if self.client.handshake_status == 1:
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# Version received, return own version
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self.client.handshake_status = 3
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target.send("VERSION %d" % self.client.version)
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elif self.client.handshake_status == 2:
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# Version received and already sent, version exchange complete
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self.client.handshake_status = 4
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target.send("KGO")
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print "Handshake complete!"
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self.pingthread = PingThread(target)
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self.pingthread.start()
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else:
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raise Exception("VERSION received outside version exchange.")
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elif chunk == "KGO":
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if self.client.handshake_status == 3:
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# Handshake complete
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self.client.handshake_status = 4
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print "Handshake complete!"
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self.pingthread = PingThread(target)
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self.pingthread.start()
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else:
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raise Exception("KGO received before handshake finalization.")
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elif chunk[:4] == "PING":
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command, pingkey = chunk.split(' ')
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target.send("PONG %s" % pingkey)
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elif chunk[:4] == "PONG":
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command, pingkey = chunk.split(' ')
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microseconds = (self.pingthread.pingtime.microsecond * 1.0) / 1000000
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seconds_start = self.pingthread.pingtime.second + microseconds
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current_time = datetime.time(datetime.now())
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microseconds = (current_time.microsecond * 1.0) / 1000000
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seconds_end = current_time.second + microseconds
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print "Latency: %f seconds" % (seconds_end - seconds_start)
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class EchoHandler(Handler):
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def process(self, chunk):
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print "Received %s" % chunk
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class SSLClient:
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hostname = ""
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port = 0
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client = None
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controlchannel = None
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controlhandler = None
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ssl_sock = None
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def __init__(self, hostname, port, allowed_certs):
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.ssl_sock = ssl.wrap_socket(sock, cert_reqs=ssl.CERT_REQUIRED, ca_certs=allowed_certs)
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self.ssl_sock.connect((hostname, port))
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self.client = Client(self.ssl_sock)
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self.client.start_handshake()
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class SSLDaemon:
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client_list = []
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client_map = {}
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select_inputs = []
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select_outputs = []
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def __init__(self):
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pass
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def start(self, interface, port, cert_path, key_path):
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bindsocket = socket.socket()
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bindsocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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bindsocket.bind((interface, port))
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bindsocket.listen(5)
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self.select_inputs = [ bindsocket ]
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while self.select_inputs:
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readable, writable, error = select.select(self.select_inputs, self.select_outputs, self.select_inputs)
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for sock in readable:
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try:
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if sock is bindsocket:
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newsocket, fromaddr = bindsocket.accept()
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connstream = ssl.wrap_socket(newsocket,
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server_side=True,
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certfile=cert_path,
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keyfile=key_path,
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ssl_version=ssl.PROTOCOL_TLSv1)
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new_client = Client(connstream)
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self.select_inputs.append(connstream)
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self.select_outputs.append(connstream)
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self.client_map[connstream.fileno()] = new_client
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self.client_list.append(new_client)
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else:
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data = sock.recv(1024)
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if data:
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cur_client = self.client_map[sock.fileno()]
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cur_client.process_data(data)
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else:
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self.select_inputs = remove_from_list(self.select_inputs, sock)
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print "NOTICE: Client disconnected"
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except ssl.SSLError, err:
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if err.args[0] == ssl.SSL_ERROR_WANT_READ:
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select.select([sock], [], [])
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elif err.args[0] == ssl.SSL_ERROR_WANT_WRITE:
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select.select([], [sock], [])
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else:
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raise
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Sven Slootweg
12 years ago