def parse(mock_write):
unpacker = Unpacker()
for call in mock_write.call_args_list:
unpacker.feed(call[0][0])
results = []
for msg in unpacker:
results.append(msg)
return results
class BaseProtocol(object):
def __init__(self):
self.unpacker = Unpacker()
def connection_made(self):
pass
def connection_lost(self, reason):
pass
def protocol_error(self, reason):
pass
def on_error(self, error):
raise NotImplementedError(self.on_info)
def on_info(self, name, rand):
raise NotImplementedError(self.on_info)
def on_auth(self, ident, hash):
raise NotImplementedError(self.on_auth)
def on_publish(self, ident, chan, data):
raise NotImplementedError(self.on_publish)
def on_subscribe(self, ident, channel):
raise NotImplementedError(self.on_subscribe)
def on_unsubscribe(self, ident, channel):
raise NotImplementedError(self.on_unsubscribe)
def message_received(self, opcode, data):
if opcode == OP_ERROR:
return self.on_error(readerror(data))
elif opcode == OP_INFO:
return self.on_info(*readinfo(data))
elif opcode == OP_AUTH:
return self.on_auth(*readauth(data))
elif opcode == OP_PUBLISH:
return self.on_publish(*readpublish(data))
elif opcode == OP_SUBSCRIBE:
return self.on_subscribe(*readsubscribe(data))
elif opcode == OP_UNSUBSCRIBE:
return self.on_unsubscribe(*readunsubscribe(data))
# Can't recover from an unknown opcode, so drop connection
self.protocol_error('Unknown message opcode: {!r}'.format(opcode))
self.transport.close()
def data_received(self, data):
self.unpacker.feed(data)
try:
for opcode, data in self.unpacker:
self.message_received(opcode, data)
except ProtocolException as e:
self.protocol_error(str(e))
self.transport.close()
def __init__(self, sock, addr, srv):
self.sock = sock
self.addr = addr
self.srv = srv
self.uid = None
self.ak = None
self.pubchans = []
self.subchans = []
self.active = True
self.unpacker = Unpacker()
def test_unpack_2(self):
message = msghdr(1, b'abcdefghijklmnopqrstuvwxyz')
unpacker = Unpacker()
# The unpacker shouldn't yield any messages until it has consumed the
# full object
for b in message[:-1]:
unpacker.feed([b])
assert list(iter(unpacker)) == []
unpacker.feed([message[-1]])
assert list(iter(unpacker)) == [(1, b'abcdefghijklmnopqrstuvwxyz')]
def __init__(self):
self.unpacker = Unpacker()
class BaseProtocol(Protocol):
def __init__(self):
self.unpacker = Unpacker()
def protocolError(self, reason):
'''
Called when an unrecoverable protocol error has been detected. The
connection will be dropped.
'''
log.err(reason)
def onError(self, error):
'''
Called by messageReceived when an OP_ERROR has been parsed.
'''
raise NotImplementedError(self.onError)
def onInfo(self, name, rand):
'''
Called by messageReceived when an OP_INFO has been parsed.
'''
raise NotImplementedError(self.onInfo)
def onAuth(self, ident, secret):
'''
Called by messageReceived when an OP_AUTH has been parsed.
'''
raise NotImplementedError(self.onAuth)
def onPublish(self, ident, chan, data):
'''
Called by messageReceived when an OP_PUBLISH has been parsed.
'''
raise NotImplementedError(self.onPublish)
def onSubscribe(self, ident, chan):
'''
Called by messageReceived when an OP_SUBSCRIBE has been parsed.
'''
raise NotImplementedError(self.onSubscribe)
def onUnsubscribe(self, ident, chan):
'''
Called by messageReceived when an OP_UNSUBSCRIBE has been parsed.
'''
raise NotImplementedError(self.onUnsubscribe)
def messageReceived(self, opcode, data):
if opcode == OP_ERROR:
return self.onError(readerror(data))
elif opcode == OP_INFO:
return self.onInfo(*readinfo(data))
elif opcode == OP_AUTH:
return self.onAuth(*readauth(data))
elif opcode == OP_PUBLISH:
return self.onPublish(*readpublish(data))
elif opcode == OP_SUBSCRIBE:
return self.onSubscribe(*readsubscribe(data))
elif opcode == OP_UNSUBSCRIBE:
return self.onUnsubscribe(*readunsubscribe(data))
# Can't recover from an unknown opcode, so drop connection
self.protocolError('Unknown message opcode: {!r}'.format(opcode))
self.transport.loseConnection()
def dataReceived(self, data):
self.unpacker.feed(data)
try:
for opcode, data in self.unpacker:
self.messageReceived(opcode, data)
except ProtocolException as e:
# Can't recover from a protocol decoding error, so drop connection
self.protocolError(str(e))
self.transport.loseConnection()
def error(self, error):
self.transport.write(msgerror(error))
def info(self, name, rand):
self.transport.write(msginfo(name, rand))
def auth(self, rand, ident, secret):
self.transport.write(msgauth(rand, ident, secret))
def publish(self, ident, channel, payload):
self.transport.write(msgpublish(ident, channel, payload))
def subscribe(self, ident, channel):
self.transport.write(msgsubscribe(ident, channel))
def unsubscribe(self, ident, channel):
self.transport.write(msgunsubscribe(ident, channel))
class Connection(object):
def __init__(self, sock, addr, srv):
self.sock = sock
self.addr = addr
self.srv = srv
self.uid = None
self.ak = None
self.pubchans = []
self.subchans = []
self.active = True
self.unpacker = Unpacker()
def __del__(self):
# if this message is not showing up we're leaking references
log.debug("Connection cleanup {0}".format(self.addr))
def write(self, data):
try:
self.sock.sendall(data)
# self.stats['bytes_sent'] += len(data)
except Exception as e:
log.critical('Exception when writing to conn', exc_info=e)
def handle(self):
# first send the info message
self.authrand = authrand = os.urandom(4)
self.write(msginfo(config.FBNAME, authrand))
while True:
self.unpacker.feed(self.s.recv(BUFSIZ))
for opcode, data in self.unpacker:
if opcode != OP_AUTH:
self.error('First message was not AUTH.')
raise BadClient()
ident, rhash = readauth(data)
self.authkey_check(ident, rhash)
break
while True:
self.unpacker.feed(self.recv(BUFSIZ))
for opcode, data in self.unpacker:
if opcode == OP_PUBLISH:
self.do_publish(*readpublish(data))
elif opcode == OP_SUBSCRIBE:
self.do_subscribe(*readsubscribe(data))
elif opcode == OP_UNSUBSCRIBE:
self.do_unsubscribe(*readsubscribe(data))
else:
self.error(
"Unknown message type.",
opcode=opcode,
length=len(data),
)
raise BadClient()
def do_publish(self, ident, chan, payload):
if not ident == self.ak:
self.error("Invalid authkey in message.", ident=ident)
raise BadClient()
if chan not in self.pubchans or chan.endswith("..broker"):
self.error("Authkey not allowed to publish here.", chan=chan)
return
self.srv.do_publish(self, chan, payload)
# self.stats["published"] += 1
def do_subscribe(self, ident, chan):
checkchan = chan
if chan.endswith('..broker'):
checkchan = chan.rsplit('..broker', 1)[0]
if checkchan not in self.subchans:
self.error(
"Authkey not allowed to subscribe here.",
chan=chan,
)
return
self.srv.do_subscribe(self, ident, chan)
def do_unsubscribe(self, ident, chan):
self.do_unsubscribe(self, ident, chan)
def authkey_check(self, ident, rhash):
akrow = self.srv.get_authkey(ident)
if not akrow:
self.error("Authentication failed.", ident=ident)
raise BadClient()
akhash = hashsecret(self.authrand, akrow["secret"])
if not akhash == rhash:
self.error("Authentication failed.", ident=ident)
raise BadClient()
self.ak = ident
self.uid = akrow["owner"]
self.pubchans = akrow.get("pubchans", [])
self.subchans = akrow.get("subchans", [])
def forward(self, ident, chan, data):
self.write(msgpublish(ident, chan, data))
# self.stats['received'] += 1
def error(self, msg, *args, **context):
emsg = msg.format(*args)
log.critical(emsg)
self.srv.log_error(emsg, self, context)
self.write(msgerror(emsg))
def test_unpack_1(self):
unpacker = Unpacker()
unpacker.feed(msghdr(1, b'abcdefghijklmnopqrstuvwxyz'))
packets = list(iter(unpacker))
assert packets == [(1, b'abcdefghijklmnopqrstuvwxyz')]
