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95 lines
3.4 KiB
Python
95 lines
3.4 KiB
Python
"""
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IMC2 client module. Handles connecting to and communicating with an IMC2 server.
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"""
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import telnetlib
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import time
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from twisted.internet.protocol import ClientFactory
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from twisted.protocols.basic import LineReceiver
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from twisted.internet import reactor, task
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from twisted.conch.telnet import StatefulTelnetProtocol
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from django.conf import settings
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from src.imc2.packets import *
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from src import logger
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# The active instance of IMC2Protocol. Set at server startup.
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IMC2_PROTOCOL_INSTANCE = None
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class IMC2Protocol(StatefulTelnetProtocol):
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"""
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Provides the abstraction for the IMC2 protocol. Handles connection,
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authentication, and all necessary packets.
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"""
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def __init__(self):
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print "IMC2: Client connecting to %s:%s..." % (settings.IMC2_SERVER_ADDRESS,
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settings.IMC2_SERVER_PORT)
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global IMC2_PROTOCOL_INSTANCE
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IMC2_PROTOCOL_INSTANCE = self
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self.is_authenticated = False
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self.auth_type = None
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self.server_name = None
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self.network_name = None
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self.sequence = None
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def connectionMade(self):
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"""
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Triggered after connecting to the IMC2 network.
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"""
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print "IMC2: Connected to network server."
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self.auth_type = "plaintext"
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print "IMC2: Sending authentication packet."
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self.send_packet(IMC2PacketAuthPlaintext())
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def send_packet(self, packet):
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"""
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Given a sub-class of IMC2Packet, assemble the packet and send it
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on its way.
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"""
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if self.sequence:
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# This gets incremented with every command.
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self.sequence += 1
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packet.imc2_protocol = self
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packet_str = packet.assemble()
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print "IMC2: SENT> %s" % packet_str
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self.sendLine(packet_str)
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def _parse_auth_response(self, line):
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"""
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Parses the IMC2 network authentication packet.
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"""
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if self.auth_type == "plaintext":
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"""
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SERVER Sends: PW <servername> <serverpw> version=<version#> <networkname>
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"""
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if line[:2] == "PW":
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line_split = line.split(' ')
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self.server_name = line_split[1]
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self.network_name = line_split[4]
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self.is_authenticated = True
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self.sequence = int(time.time())
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print "IMC2: Successfully authenticated to the '%s' network." % self.network_name
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def lineReceived(self, line):
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"""
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Triggered when text is received from the IMC2 network. Figures out
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what to do with the packet.
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"""
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if not self.is_authenticated:
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self._parse_auth_response(line)
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else:
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logger.log_infomsg("PACKET: %s" % line)
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logger.log_infomsg(IMC2Packet(packet_str = line))
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#print "receive:", line
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class IMC2ClientFactory(ClientFactory):
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"""
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Creates instances of the IMC2Protocol. Should really only ever create one
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in our particular instance. Tied in via src/server.py.
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"""
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protocol = IMC2Protocol
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def clientConnectionFailed(self, connector, reason):
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logger.log_errmsg('connection failed: %s' % reason.getErrorMessage())
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def clientConnectionLost(self, connector, reason):
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logger.log_errmsg('connection lost: %s' % reason.getErrorMessage())
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