236 lines
10 KiB
Python
236 lines
10 KiB
Python
#!/usr/bin/env python3
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import sys, socket, threading, re, time, logging, uuid, xml.etree.ElementTree as ET
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class XMPPServer():
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server_id = 'bumper'
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bot_id = 'bumpy'
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client_id = None
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clients = []
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exit_flag = False
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def __init__(self, address):
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try:
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# Initialize bot server
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self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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self.socket.bind(address)
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self.socket.listen(1)
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logging.info('XMPPServer: listening on {}:{}'.format(address[0], address[1]))
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while not self.exit_flag:
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logging.info('XMPPServer: awaiting connection')
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connection, client_address = self.socket.accept()
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# disconnect any clients with this ip
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for client in self.clients:
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if client.address == client_address[0]:
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client.disconnect()
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client.join()
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thread_id = uuid.uuid4()
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client = Client(thread_id, connection, client_address)
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client.start()
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self.clients.append(client)
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self.socket.close()
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except PermissionError as e:
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if "bind" in e.strerror:
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logging.exception("Error binding xmppserver, exiting. Try using a different hostname or IP.\r\n {}".format(e))
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exit(1)
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except Exception as e:
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logging.exception('XMPPServer: {}'.format(e))
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exit(1)
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except KeyboardInterrupt:
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logging.exception('XMPPServer: Keyboard interrupt')
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finally:
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self.disconnect()
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logging.info('XMPPServer: bye')
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def disconnect(self):
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try:
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logging.info('XMPPServer: waiting for all client threads to exit')
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for client in self.clients:
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client.disconnect()
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client.join()
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self.exit_flag = True
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logging.info('XMPPServer: shutting down...')
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except Exception as e:
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logging.exception("XMPPServer Exception: {}".format(e))
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class Client(threading.Thread):
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IDLE = 0
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CONNECT = 1
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INIT = 2
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BIND = 3
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READY = 4
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DISCONNECT = 5
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UNKNOWN = 0
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BOT = 1
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CONTROLLER = 2
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def __init__(self, thread_id, connection, client_address):
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threading.Thread.__init__(self)
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self.id = thread_id
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self.name = "XMPP Thread {}".format(client_address[0])
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self.type = self.UNKNOWN
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self.state = self.IDLE
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self.connection = connection
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self.address = client_address[0]
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self.clientresource = ""
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def send(self, command):
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try:
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logging.debug('XMPPServer to {}: {}'.format(self.address, command))
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self.connection.send(command.encode())
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except OSError as e:
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logging.error('XMPPServer: {}'.format(e))
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except Exception as e:
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logging.exception("XMPPServer Exception: {}".format(e))
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def disconnect(self):
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try:
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logging.info('XMPPServer: {} with resource {} disconnecting'.format(self.address, self.clientresource))
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self.connection.close()
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self._set_state('DISCONNECT')
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except Exception as e:
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logging.exception("XMPPServer Exception: {}".format(e))
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def _tag_strip_uri(self, tag):
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try:
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if tag[0] == '{':
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uri, ignore, tag = tag[1:].partition('}')
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return tag
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except Exception as e:
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logging.exception("XMPPServer Exception: {}".format(e))
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def _set_state(self, state):
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try:
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new_state = getattr(Client, state)
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if self.state > new_state:
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raise Exception('XMPPServer: {} illegal state change {}->{}'.format(self.address, self.state, new_state))
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logging.debug('XMPPServer: {} state: {}'.format(self.address, state))
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self.state = new_state
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if new_state == '5':
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self.join()
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except Exception as e:
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logging.exception("XMPPServer: Exception: {}".format(e))
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def _handle_ctl(self, xml, data):
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try:
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ctl = xml[0][0]
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if ctl.get('admin') and self.type == self.BOT:
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logging.debug('XMPPServer: admin username received from bot: {}'.format(ctl.get('admin')))
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XMPPServer.client_id = ctl.get('admin')
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return
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# forward
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for client in XMPPServer.clients:
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if client.address != self.address and client.state == client.READY:
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if client.type == self.BOT:
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data = data.decode('utf-8')
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id_index = data.find('id')
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if id_index > -1:
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data = data[:id_index] + 'from="' + XMPPServer.client_id + '" ' + data[id_index:]
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data = data.encode()
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client.send(data.decode('utf-8'))
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except Exception as e:
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logging.exception("XMPPServer Exception: {}".format(e))
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def _handle_ping(self, xml, data):
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if(xml.get('to').find('@') == -1):
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# Ping to server - respond
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self.send('<iq type="result" id="{}" from="{}" />'.format(xml.get('id'), xml.get('to')))
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else:
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for client in XMPPServer.clients:
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if client.address != self.address and client.state == client.READY:
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client.send(data.decode('utf-8'))
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def _handle_result(self, data):
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# forward
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try:
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for client in XMPPServer.clients:
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if client.address != self.address and client.state == client.READY:
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client.send(data.decode('utf-8'))
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except Exception as e:
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logging.exception("XMPPServer Exception: {}".format(e))
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def run(self):
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try:
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logging.info('XMPPServer: client connected: {}'.format(self.address))
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self._set_state('CONNECT')
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data = ""
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while True:
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time.sleep(0.2)
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if not self.connection._closed:
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data = self.connection.recv(4096)
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if data:
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logging.debug('XMPPServer: from {}: {}'.format(self.address, data.decode('utf-8')))
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try:
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if self.state == self.CONNECT:
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if data.decode('utf-8').find('jabber:client') > -1:
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self._set_state('INIT')
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# ack jabbr:client
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self.send('<stream:stream xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client" version="1.0" id="1" from="{}">'.format(XMPPServer.server_id))
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time.sleep(0.5)
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# session
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self.send('<stream:features><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"/><session xmlns="urn:ietf:params:xml:ns:xmpp-session"/></stream:features>')
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continue
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xml = ET.fromstring(data)
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logging.debug("XMPPXML: {}".format(data))
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if len(xml):
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child = self._tag_strip_uri(xml[0].tag)
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else:
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child = None
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if xml.tag == 'iq':
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res = None
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if child == 'bind':
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clientbindxml = xml.getchildren()
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clientresourcexml = clientbindxml[0].getchildren()
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self.clientresource = clientresourcexml[0].text
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self.name = "XMPP Thread {}".format(self.clientresource)
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logging.info("XMPP Client {} using resource {}".format(self.address, self.clientresource))
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res = '<iq type="result" id="{}"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><jid>{}</jid></bind></iq>'.format(xml.get('id'), XMPPServer.bot_id)
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self._set_state('BIND')
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elif child == 'session':
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res = '<iq type="result" id="{}" />'.format(xml.get('id'))
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self._set_state('READY')
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elif child == 'query':
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self._handle_ctl(xml, data)
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elif child == 'ping':
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self._handle_ping(xml, data)
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elif xml.get('type') == 'result':
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self._handle_result(data)
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if res:
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self.send(res)
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elif xml.tag == 'presence':
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if len(xml) and xml[0].tag == 'status':
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# bot announcing arrival
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self.type = self.BOT
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logging.debug('XMPPServer: {} type set to BOT (based on presence tag)'.format(self.address))
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# send a command from an unknown user - the response will contain the correct admin username
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self.send('<iq type="set" id="{}" from="{}" to="{}"><query xmlns="com:ctl"><ctl td="GetCleanState" /></query></iq>'.format(uuid.uuid4(), 'unknown@ecouser.net', XMPPServer.bot_id))
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elif xml.get('type') == 'available':
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self.type = self.CONTROLLER
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logging.debug('XMPPServer: {} type set to CONTROLLER (based on presence tag)'.format(self.address))
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except ET.ParseError as e:
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logging.debug('error: {}'.format(e))
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except Exception as e:
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logging.error('XMPPServer: {}'.format(e))
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self._set_state('DISCONNECT')
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except OSError as e:
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logging.error('XMPPServer: {}'.format(e))
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self._set_state('DISCONNECT')
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except ConnectionResetError as e:
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logging.error('XMPPServer: {}'.format(e))
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self._set_state('DISCONNECT')
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except Exception as e:
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logging.error('XMPPServer: {}'.format(e))
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self._set_state('DISCONNECT')
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finally:
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self.disconnect()
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