mirror of
https://github.com/jlu5/PyLink.git
synced 2024-11-27 13:09:23 +01:00
494 lines
20 KiB
Python
494 lines
20 KiB
Python
import threading
|
|
from random import randint
|
|
import time
|
|
import socket
|
|
import threading
|
|
import ssl
|
|
from collections import defaultdict
|
|
import hashlib
|
|
from copy import deepcopy
|
|
|
|
from log import log
|
|
from conf import conf
|
|
import world
|
|
import utils
|
|
|
|
### Exceptions
|
|
|
|
class ProtocolError(Exception):
|
|
pass
|
|
|
|
### Internal classes (users, servers, channels)
|
|
|
|
class Irc():
|
|
def initVars(self):
|
|
self.connected.clear()
|
|
self.aborted.clear()
|
|
self.pseudoclient = None
|
|
self.lastping = time.time()
|
|
|
|
# Internal variable to set the place the last command was called (in PM
|
|
# or in a channel), used by fantasy command support.
|
|
self.called_by = None
|
|
|
|
# Server, channel, and user indexes to be populated by our protocol module
|
|
self.servers = {self.sid: IrcServer(None, self.serverdata['hostname'],
|
|
internal=True, desc=self.serverdata.get('serverdesc')
|
|
or self.botdata['serverdesc'])}
|
|
self.users = {}
|
|
self.channels = defaultdict(IrcChannel)
|
|
# Sets flags such as whether to use halfops, etc. The default RFC1459
|
|
# modes are implied.
|
|
self.cmodes = {'op': 'o', 'secret': 's', 'private': 'p',
|
|
'noextmsg': 'n', 'moderated': 'm', 'inviteonly': 'i',
|
|
'topiclock': 't', 'limit': 'l', 'ban': 'b',
|
|
'voice': 'v', 'key': 'k',
|
|
# Type A, B, and C modes
|
|
'*A': 'b',
|
|
'*B': 'k',
|
|
'*C': 'l',
|
|
'*D': 'imnpstr'}
|
|
self.umodes = {'invisible': 'i', 'snomask': 's', 'wallops': 'w',
|
|
'oper': 'o',
|
|
'*A': '', '*B': '', '*C': 's', '*D': 'iow'}
|
|
|
|
# This max nick length starts off as the config value, but may be
|
|
# overwritten later by the protocol module if such information is
|
|
# received. Note that only some IRCds (InspIRCd) give us nick length
|
|
# during link, so it is still required that the config value be set!
|
|
self.maxnicklen = self.serverdata['maxnicklen']
|
|
self.prefixmodes = {'o': '@', 'v': '+'}
|
|
|
|
# Uplink SID (filled in by protocol module)
|
|
self.uplink = None
|
|
self.start_ts = int(time.time())
|
|
|
|
def __init__(self, netname, proto):
|
|
# Initialize some variables
|
|
self.name = netname.lower()
|
|
self.conf = conf
|
|
self.serverdata = conf['servers'][netname]
|
|
self.sid = self.serverdata["sid"]
|
|
self.botdata = conf['bot']
|
|
self.protoname = proto.__name__
|
|
self.proto = proto.Class(self)
|
|
self.pingfreq = self.serverdata.get('pingfreq') or 30
|
|
self.pingtimeout = self.pingfreq * 2
|
|
|
|
self.connected = threading.Event()
|
|
self.aborted = threading.Event()
|
|
|
|
self.initVars()
|
|
|
|
if world.testing:
|
|
# HACK: Don't thread if we're running tests.
|
|
self.connect()
|
|
else:
|
|
self.connection_thread = threading.Thread(target = self.connect)
|
|
self.connection_thread.start()
|
|
self.pingTimer = None
|
|
|
|
def connect(self):
|
|
ip = self.serverdata["ip"]
|
|
port = self.serverdata["port"]
|
|
while True:
|
|
self.initVars()
|
|
checks_ok = True
|
|
try:
|
|
self.socket = socket.socket()
|
|
self.socket.setblocking(0)
|
|
# Initial connection timeout is a lot smaller than the timeout after
|
|
# we've connected; this is intentional.
|
|
self.socket.settimeout(self.pingfreq)
|
|
self.ssl = self.serverdata.get('ssl')
|
|
if self.ssl:
|
|
log.info('(%s) Attempting SSL for this connection...', self.name)
|
|
certfile = self.serverdata.get('ssl_certfile')
|
|
keyfile = self.serverdata.get('ssl_keyfile')
|
|
if certfile and keyfile:
|
|
try:
|
|
self.socket = ssl.wrap_socket(self.socket,
|
|
certfile=certfile,
|
|
keyfile=keyfile)
|
|
except OSError:
|
|
log.exception('(%s) Caught OSError trying to '
|
|
'initialize the SSL connection; '
|
|
'are "ssl_certfile" and '
|
|
'"ssl_keyfile" set correctly?',
|
|
self.name)
|
|
checks_ok = False
|
|
else:
|
|
log.error('(%s) SSL certfile/keyfile was not set '
|
|
'correctly, aborting... ', self.name)
|
|
checks_ok = False
|
|
log.info("Connecting to network %r on %s:%s", self.name, ip, port)
|
|
self.socket.connect((ip, port))
|
|
self.socket.settimeout(self.pingtimeout)
|
|
|
|
if self.ssl and checks_ok:
|
|
peercert = self.socket.getpeercert(binary_form=True)
|
|
sha1fp = hashlib.sha1(peercert).hexdigest()
|
|
expected_fp = self.serverdata.get('ssl_fingerprint')
|
|
if expected_fp:
|
|
if sha1fp != expected_fp:
|
|
log.error('(%s) Uplink\'s SSL certificate '
|
|
'fingerprint (SHA1) does not match the '
|
|
'one configured: expected %r, got %r; '
|
|
'disconnecting...', self.name,
|
|
expected_fp, sha1fp)
|
|
checks_ok = False
|
|
else:
|
|
log.info('(%s) Uplink SSL certificate fingerprint '
|
|
'(SHA1) verified: %r', self.name, sha1fp)
|
|
else:
|
|
log.info('(%s) Uplink\'s SSL certificate fingerprint '
|
|
'is %r. You can enhance the security of your '
|
|
'link by specifying this in a "ssl_fingerprint"'
|
|
' option in your server block.', self.name,
|
|
sha1fp)
|
|
|
|
if checks_ok:
|
|
self.proto.connect()
|
|
self.spawnMain()
|
|
log.info('(%s) Starting ping schedulers....', self.name)
|
|
self.schedulePing()
|
|
log.info('(%s) Server ready; listening for data.', self.name)
|
|
self.run()
|
|
else:
|
|
log.error('(%s) A configuration error was encountered '
|
|
'trying to set up this connection. Please check'
|
|
' your configuration file and try again.',
|
|
self.name)
|
|
except (socket.error, ProtocolError, ConnectionError) as e:
|
|
log.warning('(%s) Disconnected from IRC: %s: %s',
|
|
self.name, type(e).__name__, str(e))
|
|
self._disconnect()
|
|
autoconnect = self.serverdata.get('autoconnect')
|
|
log.debug('(%s) Autoconnect delay set to %s seconds.', self.name, autoconnect)
|
|
if autoconnect is not None and autoconnect >= 0:
|
|
log.info('(%s) Going to auto-reconnect in %s seconds.', self.name, autoconnect)
|
|
time.sleep(autoconnect)
|
|
else:
|
|
return
|
|
|
|
def callCommand(self, source, text):
|
|
cmd_args = text.strip().split(' ')
|
|
cmd = cmd_args[0].lower()
|
|
cmd_args = cmd_args[1:]
|
|
if cmd not in world.commands:
|
|
self.msg(self.called_by or source, 'Error: Unknown command %r.' % cmd)
|
|
return
|
|
log.info('(%s) Calling command %r for %s', self.name, cmd, utils.getHostmask(self, source))
|
|
for func in world.commands[cmd]:
|
|
try:
|
|
func(self, source, cmd_args)
|
|
except utils.NotAuthenticatedError:
|
|
self.msg(self.called_by or source, 'Error: You are not authorized to perform this operation.')
|
|
except Exception as e:
|
|
log.exception('Unhandled exception caught in command %r', cmd)
|
|
self.msg(self.called_by or source, 'Uncaught exception in command %r: %s: %s' % (cmd, type(e).__name__, str(e)))
|
|
|
|
def msg(self, target, text, notice=False, source=None):
|
|
"""Handy function to send messages/notices to clients. Source
|
|
is optional, and defaults to the main PyLink client if not specified."""
|
|
source = source or self.pseudoclient.uid
|
|
if notice:
|
|
self.proto.noticeClient(source, target, text)
|
|
cmd = 'PYLINK_SELF_NOTICE'
|
|
else:
|
|
self.proto.messageClient(source, target, text)
|
|
cmd = 'PYLINK_SELF_PRIVMSG'
|
|
self.callHooks([source, cmd, {'target': target, 'text': text}])
|
|
|
|
def _disconnect(self):
|
|
log.debug('(%s) Canceling pingTimer at %s due to _disconnect() call', self.name, time.time())
|
|
self.connected.clear()
|
|
try:
|
|
self.socket.close()
|
|
self.pingTimer.cancel()
|
|
except: # Socket timed out during creation; ignore
|
|
pass
|
|
# Internal hook signifying that a network has disconnected.
|
|
self.callHooks([None, 'PYLINK_DISCONNECT', {}])
|
|
|
|
def disconnect(self):
|
|
"""Closes the IRC connection."""
|
|
self.aborted.set()
|
|
|
|
def run(self):
|
|
buf = b""
|
|
data = b""
|
|
while not self.aborted.is_set():
|
|
data = self.socket.recv(2048)
|
|
buf += data
|
|
if self.connected.is_set() and not data:
|
|
log.warning('(%s) No data received and self.connected is set; disconnecting!', self.name)
|
|
return
|
|
elif (time.time() - self.lastping) > self.pingtimeout:
|
|
log.warning('(%s) Connection timed out.', self.name)
|
|
return
|
|
while b'\n' in buf:
|
|
line, buf = buf.split(b'\n', 1)
|
|
line = line.strip(b'\r')
|
|
# FIXME: respect other encodings?
|
|
line = line.decode("utf-8", "replace")
|
|
self.runline(line)
|
|
|
|
def runline(self, line):
|
|
"""Sends a command to the protocol module."""
|
|
log.debug("(%s) <- %s", self.name, line)
|
|
try:
|
|
hook_args = self.proto.handle_events(line)
|
|
except Exception:
|
|
log.exception('(%s) Caught error in handle_events, disconnecting!', self.name)
|
|
log.error('(%s) The offending line was: <- %s', self.name, line)
|
|
return
|
|
# Only call our hooks if there's data to process. Handlers that support
|
|
# hooks will return a dict of parsed arguments, which can be passed on
|
|
# to plugins and the like. For example, the JOIN handler will return
|
|
# something like: {'channel': '#whatever', 'users': ['UID1', 'UID2',
|
|
# 'UID3']}, etc.
|
|
if hook_args is not None:
|
|
self.callHooks(hook_args)
|
|
|
|
def callHooks(self, hook_args):
|
|
numeric, command, parsed_args = hook_args
|
|
# Always make sure TS is sent.
|
|
if 'ts' not in parsed_args:
|
|
parsed_args['ts'] = int(time.time())
|
|
hook_cmd = command
|
|
hook_map = self.proto.hook_map
|
|
# Handlers can return a 'parse_as' key to send their payload to a
|
|
# different hook. An example of this is "/join 0" being interpreted
|
|
# as leaving all channels (PART).
|
|
if command in hook_map:
|
|
hook_cmd = hook_map[command]
|
|
hook_cmd = parsed_args.get('parse_as') or hook_cmd
|
|
log.debug('(%s) Parsed args %r received from %s handler (calling hook %s)',
|
|
self.name, parsed_args, command, hook_cmd)
|
|
# Iterate over hooked functions, catching errors accordingly
|
|
for hook_func in world.hooks[hook_cmd]:
|
|
try:
|
|
log.debug('(%s) Calling hook function %s from plugin "%s"', self.name,
|
|
hook_func, hook_func.__module__)
|
|
hook_func(self, numeric, command, parsed_args)
|
|
except Exception:
|
|
# We don't want plugins to crash our servers...
|
|
log.exception('(%s) Unhandled exception caught in %r',
|
|
self.name, hook_func)
|
|
continue
|
|
|
|
def send(self, data):
|
|
# Safeguard against newlines in input!! Otherwise, each line gets
|
|
# treated as a separate command, which is particularly nasty.
|
|
data = data.replace('\n', ' ')
|
|
data = data.encode("utf-8") + b"\n"
|
|
stripped_data = data.decode("utf-8").strip("\n")
|
|
log.debug("(%s) -> %s", self.name, stripped_data)
|
|
try:
|
|
self.socket.send(data)
|
|
except (OSError, AttributeError):
|
|
log.debug("(%s) Dropping message %r; network isn't connected!", self.name, stripped_data)
|
|
|
|
def schedulePing(self):
|
|
self.proto.pingServer()
|
|
self.pingTimer = threading.Timer(self.pingfreq, self.schedulePing)
|
|
self.pingTimer.daemon = True
|
|
self.pingTimer.start()
|
|
log.debug('(%s) Ping scheduled at %s', self.name, time.time())
|
|
|
|
def spawnMain(self):
|
|
nick = self.botdata.get('nick') or 'PyLink'
|
|
ident = self.botdata.get('ident') or 'pylink'
|
|
host = self.serverdata["hostname"]
|
|
log.info('(%s) Connected! Spawning main client %s.', self.name, nick)
|
|
olduserobj = self.pseudoclient
|
|
self.pseudoclient = self.proto.spawnClient(nick, ident, host,
|
|
modes={("+o", None)},
|
|
manipulatable=True)
|
|
for chan in self.serverdata['channels']:
|
|
self.proto.joinClient(self.pseudoclient.uid, chan)
|
|
# PyLink internal hook called when spawnMain is called and the
|
|
# contents of Irc().pseudoclient change.
|
|
self.callHooks([self.sid, 'PYLINK_SPAWNMAIN', {'olduser': olduserobj}])
|
|
|
|
class IrcUser():
|
|
def __init__(self, nick, ts, uid, ident='null', host='null',
|
|
realname='PyLink dummy client', realhost='null',
|
|
ip='0.0.0.0', manipulatable=False):
|
|
self.nick = nick
|
|
self.ts = ts
|
|
self.uid = uid
|
|
self.ident = ident
|
|
self.host = host
|
|
self.realhost = realhost
|
|
self.ip = ip
|
|
self.realname = realname
|
|
self.modes = set()
|
|
|
|
self.identified = False
|
|
self.channels = set()
|
|
self.away = ''
|
|
|
|
# Whether the client should be marked as manipulatable
|
|
# (i.e. we are allowed to play with it using bots.py's commands).
|
|
# For internal services clients, this should always be False.
|
|
self.manipulatable = manipulatable
|
|
|
|
def __repr__(self):
|
|
return repr(self.__dict__)
|
|
|
|
class IrcServer():
|
|
"""PyLink IRC Server class.
|
|
|
|
uplink: The SID of this IrcServer instance's uplink. This is set to None
|
|
for the main PyLink PseudoServer!
|
|
name: The name of the server.
|
|
internal: Whether the server is an internal PyLink PseudoServer.
|
|
"""
|
|
def __init__(self, uplink, name, internal=False, desc="(None given)"):
|
|
self.uplink = uplink
|
|
self.users = set()
|
|
self.internal = internal
|
|
self.name = name.lower()
|
|
self.desc = desc
|
|
def __repr__(self):
|
|
return repr(self.__dict__)
|
|
|
|
class IrcChannel():
|
|
def __init__(self):
|
|
self.users = set()
|
|
self.modes = {('n', None), ('t', None)}
|
|
self.topic = ''
|
|
self.ts = int(time.time())
|
|
self.topicset = False
|
|
self.prefixmodes = {'ops': set(), 'halfops': set(), 'voices': set(),
|
|
'owners': set(), 'admins': set()}
|
|
|
|
def __repr__(self):
|
|
return repr(self.__dict__)
|
|
|
|
def removeuser(self, target):
|
|
for s in self.prefixmodes.values():
|
|
s.discard(target)
|
|
self.users.discard(target)
|
|
|
|
def deepcopy(self):
|
|
return deepcopy(self)
|
|
|
|
### FakeIRC classes, used for test cases
|
|
|
|
class FakeIRC(Irc):
|
|
def connect(self):
|
|
self.messages = []
|
|
self.hookargs = []
|
|
self.hookmsgs = []
|
|
self.socket = None
|
|
self.initVars()
|
|
self.spawnMain()
|
|
self.connected = threading.Event()
|
|
self.connected.set()
|
|
|
|
def run(self, data):
|
|
"""Queues a message to the fake IRC server."""
|
|
log.debug('<- ' + data)
|
|
hook_args = self.proto.handle_events(data)
|
|
if hook_args is not None:
|
|
self.hookmsgs.append(hook_args)
|
|
self.callHooks(hook_args)
|
|
|
|
def send(self, data):
|
|
self.messages.append(data)
|
|
log.debug('-> ' + data)
|
|
|
|
def takeMsgs(self):
|
|
"""Returns a list of messages sent by the protocol module since
|
|
the last takeMsgs() call, so we can track what has been sent."""
|
|
msgs = self.messages
|
|
self.messages = []
|
|
return msgs
|
|
|
|
def takeCommands(self, msgs):
|
|
"""Returns a list of commands parsed from the output of takeMsgs()."""
|
|
sidprefix = ':' + self.sid
|
|
commands = []
|
|
for m in msgs:
|
|
args = m.split()
|
|
if m.startswith(sidprefix):
|
|
commands.append(args[1])
|
|
else:
|
|
commands.append(args[0])
|
|
return commands
|
|
|
|
def takeHooks(self):
|
|
"""Returns a list of hook arguments sent by the protocol module since
|
|
the last takeHooks() call."""
|
|
hookmsgs = self.hookmsgs
|
|
self.hookmsgs = []
|
|
return hookmsgs
|
|
|
|
class Protocol():
|
|
# TODO: Future state-keeping things will go here
|
|
def __init__(self, irc):
|
|
self.irc = irc
|
|
self.casemapping = 'rfc1459'
|
|
self.hook_map = {}
|
|
|
|
def parseArgs(self, args):
|
|
"""Parses a string of RFC1459-style arguments split into a list, where ":" may
|
|
be used for multi-word arguments that last until the end of a line.
|
|
"""
|
|
real_args = []
|
|
for idx, arg in enumerate(args):
|
|
real_args.append(arg)
|
|
# If the argument starts with ':' and ISN'T the first argument.
|
|
# The first argument is used for denoting the source UID/SID.
|
|
if arg.startswith(':') and idx != 0:
|
|
# : is used for multi-word arguments that last until the end
|
|
# of the message. We can use list splicing here to turn them all
|
|
# into one argument.
|
|
# Set the last arg to a joined version of the remaining args
|
|
arg = args[idx:]
|
|
arg = ' '.join(arg)[1:]
|
|
# Cut the original argument list right before the multi-word arg,
|
|
# and then append the multi-word arg.
|
|
real_args = args[:idx]
|
|
real_args.append(arg)
|
|
break
|
|
return real_args
|
|
|
|
def removeClient(self, numeric):
|
|
"""Internal function to remove a client from our internal state."""
|
|
for c, v in self.irc.channels.copy().items():
|
|
v.removeuser(numeric)
|
|
# Clear empty non-permanent channels.
|
|
if not (self.irc.channels[c].users or ((self.irc.cmodes.get('permanent'), None) in self.irc.channels[c].modes)):
|
|
del self.irc.channels[c]
|
|
assert numeric not in v.users, "IrcChannel's removeuser() is broken!"
|
|
|
|
sid = numeric[:3]
|
|
log.debug('Removing client %s from self.irc.users', numeric)
|
|
del self.irc.users[numeric]
|
|
log.debug('Removing client %s from self.irc.servers[%s].users', numeric, sid)
|
|
self.irc.servers[sid].users.discard(numeric)
|
|
|
|
class FakeProto(Protocol):
|
|
"""Dummy protocol module for testing purposes."""
|
|
def handle_events(self, data):
|
|
pass
|
|
|
|
def connect(self):
|
|
pass
|
|
|
|
def spawnClient(self, nick, *args, **kwargs):
|
|
uid = str(randint(1, 10000000000))
|
|
ts = int(time.time())
|
|
self.irc.users[uid] = user = IrcUser(nick, ts, uid)
|
|
return user
|
|
|
|
def joinClient(self, client, channel):
|
|
self.irc.channels[channel].users.add(client)
|
|
self.irc.users[client].channels.add(channel)
|
|
|
|
FakeProto.Class = FakeProto
|