Source code for supybot.irclib

###
# Copyright (c) 2002-2005 Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
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#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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###

import re
import copy
import time
import random
import base64
import collections

try:
    import ecdsa
except ImportError:
    ecdsa = None

try:
    import pyxmpp2_scram as scram
except ImportError:
    scram = None

from . import conf, ircdb, ircmsgs, ircutils, log, utils, world
from .utils.str import rsplit
from .utils.iter import chain
from .utils.structures import smallqueue, RingBuffer

###
# The base class for a callback to be registered with an Irc object.  Shows
# the required interface for callbacks -- name(),
# inFilter(irc, msg), outFilter(irc, msg), and __call__(irc, msg) [used so as
# to make functions used as callbacks conceivable, and so if refactoring ever
# changes the nature of the callbacks from classes to functions, syntactical
# changes elsewhere won't be required.]
###

[docs]class IrcCommandDispatcher(object): """Base class for classes that must dispatch on a command."""
[docs] def dispatchCommand(self, command): """Given a string 'command', dispatches to doCommand.""" return getattr(self, 'do' + command.capitalize(), None)
[docs]class IrcCallback(IrcCommandDispatcher, log.Firewalled): """Base class for standard callbacks. Callbacks derived from this class should have methods of the form "doCommand" -- doPrivmsg, doNick, do433, etc. These will be called on matching messages. """ callAfter = () callBefore = () __firewalled__ = {'die': None, 'reset': None, '__call__': None, 'inFilter': lambda self, irc, msg: msg, 'outFilter': lambda self, irc, msg: msg, 'name': lambda self: self.__class__.__name__, 'callPrecedence': lambda self, irc: ([], []), } def __init__(self, *args, **kwargs): #object doesn't take any args, so the buck stops here. #super(IrcCallback, self).__init__(*args, **kwargs) pass def __repr__(self): return '<%s %s %s>' % \ (self.__class__.__name__, self.name(), object.__repr__(self)) def name(self): """Returns the name of the callback.""" return self.__class__.__name__ def callPrecedence(self, irc): """Returns a pair of (callbacks to call before me, callbacks to call after me)""" after = [] before = [] for name in self.callBefore: cb = irc.getCallback(name) if cb is not None: after.append(cb) for name in self.callAfter: cb = irc.getCallback(name) if cb is not None: before.append(cb) assert self not in after, '%s was in its own after.' % self.name() assert self not in before, '%s was in its own before.' % self.name() return (before, after) def inFilter(self, irc, msg): """Used for filtering/modifying messages as they're entering. ircmsgs.IrcMsg objects are immutable, so this method is expected to return another ircmsgs.IrcMsg object. Obviously the same IrcMsg can be returned. """ return msg def outFilter(self, irc, msg): """Used for filtering/modifying messages as they're leaving. As with inFilter, an IrcMsg is returned. """ return msg def __call__(self, irc, msg): """Used for handling each message.""" method = self.dispatchCommand(msg.command) if method is not None: method(irc, msg) def reset(self): """Resets the callback. Called when reconnecting to the server.""" pass def die(self): """Makes the callback die. Called when the parent Irc object dies.""" pass
### # Basic queue for IRC messages. It doesn't presently (but should at some # later point) reorder messages based on priority or penalty calculations. ### _high = frozenset(['MODE', 'KICK', 'PONG', 'NICK', 'PASS', 'CAPAB', 'REMOVE']) _low = frozenset(['PRIVMSG', 'PING', 'WHO', 'NOTICE', 'JOIN'])
[docs]class IrcMsgQueue(object): """Class for a queue of IrcMsgs. Eventually, it should be smart. Probably smarter than it is now, though it's gotten quite a bit smarter than it originally was. A method to "score" methods, and a heapq to maintain a priority queue of the messages would be the ideal way to do intelligent queuing. As it stands, however, we simply keep track of 'high priority' messages, 'low priority' messages, and normal messages, and just make sure to return the 'high priority' ones before the normal ones before the 'low priority' ones. """ __slots__ = ('msgs', 'highpriority', 'normal', 'lowpriority', 'lastJoin') def __init__(self, iterable=()): self.reset() for msg in iterable: self.enqueue(msg)
[docs] def reset(self): """Clears the queue.""" self.lastJoin = 0 self.highpriority = smallqueue() self.normal = smallqueue() self.lowpriority = smallqueue()
[docs] def enqueue(self, msg): """Enqueues a given message.""" if msg in self and \ conf.supybot.protocols.irc.queuing.duplicates(): s = str(msg).strip() log.info('Not adding message %q to queue, already added.', s) return False else: if msg.command in _high: self.highpriority.enqueue(msg) elif msg.command in _low: self.lowpriority.enqueue(msg) else: self.normal.enqueue(msg) return True
[docs] def dequeue(self): """Dequeues a given message.""" msg = None if self.highpriority: msg = self.highpriority.dequeue() elif self.normal: msg = self.normal.dequeue() elif self.lowpriority: msg = self.lowpriority.dequeue() if msg.command == 'JOIN': limit = conf.supybot.protocols.irc.queuing.rateLimit.join() now = time.time() if self.lastJoin + limit <= now: self.lastJoin = now else: self.lowpriority.enqueue(msg) msg = None return msg
def __contains__(self, msg): return msg in self.normal or \ msg in self.lowpriority or \ msg in self.highpriority def __bool__(self): return bool(self.highpriority or self.normal or self.lowpriority) __nonzero__ = __bool__ def __len__(self): return len(self.highpriority)+len(self.lowpriority)+len(self.normal) def __repr__(self): name = self.__class__.__name__ return '%s(%r)' % (name, list(chain(self.highpriority, self.normal, self.lowpriority))) __str__ = __repr__
### # Maintains the state of IRC connection -- the most recent messages, the # status of various modes (especially ops/halfops/voices) in channels, etc. ###
[docs]class ChannelState(utils.python.Object): __slots__ = ('users', 'ops', 'halfops', 'bans', 'voices', 'topic', 'modes', 'created') def __init__(self): self.topic = '' self.created = 0 self.ops = ircutils.IrcSet() self.bans = ircutils.IrcSet() self.users = ircutils.IrcSet() self.voices = ircutils.IrcSet() self.halfops = ircutils.IrcSet() self.modes = {} def isOp(self, nick): return nick in self.ops def isOpPlus(self, nick): return nick in self.ops def isVoice(self, nick): return nick in self.voices def isVoicePlus(self, nick): return nick in self.voices or nick in self.halfops or nick in self.ops def isHalfop(self, nick): return nick in self.halfops def isHalfopPlus(self, nick): return nick in self.halfops or nick in self.ops
[docs] def addUser(self, user): "Adds a given user to the ChannelState. Power prefixes are handled." nick = user.lstrip('@%+&~!') if not nick: return # & is used to denote protected users in UnrealIRCd # ~ is used to denote channel owner in UnrealIRCd # ! is used to denote protected users in UltimateIRCd while user and user[0] in '@%+&~!': (marker, user) = (user[0], user[1:]) assert user, 'Looks like my caller is passing chars, not nicks.' if marker in '@&~!': self.ops.add(nick) elif marker == '%': self.halfops.add(nick) elif marker == '+': self.voices.add(nick) self.users.add(nick)
[docs] def replaceUser(self, oldNick, newNick): """Changes the user oldNick to newNick; used for NICK changes.""" # Note that this doesn't have to have the sigil (@%+) that users # have to have for addUser; it just changes the name of the user # without changing any of their categories. for s in (self.users, self.ops, self.halfops, self.voices): if oldNick in s: s.remove(oldNick) s.add(newNick)
[docs] def removeUser(self, user): """Removes a given user from the channel.""" self.users.discard(user) self.ops.discard(user) self.halfops.discard(user) self.voices.discard(user)
def setMode(self, mode, value=None): assert mode not in 'ovhbeq' self.modes[mode] = value def unsetMode(self, mode): assert mode not in 'ovhbeq' if mode in self.modes: del self.modes[mode] def doMode(self, msg): def getSet(c): if c == 'o': Set = self.ops elif c == 'v': Set = self.voices elif c == 'h': Set = self.halfops elif c == 'b': Set = self.bans else: # We don't care yet, so we'll just return an empty set. Set = set() return Set for (mode, value) in ircutils.separateModes(msg.args[1:]): (action, modeChar) = mode if modeChar in 'ovhbeq': # We don't handle e or q yet. Set = getSet(modeChar) if action == '-': Set.discard(value) elif action == '+': Set.add(value) else: if action == '+': self.setMode(modeChar, value) else: assert action == '-' self.unsetMode(modeChar) def __getstate__(self): return [getattr(self, name) for name in self.__slots__] def __setstate__(self, t): for (name, value) in zip(self.__slots__, t): setattr(self, name, value) def __eq__(self, other): ret = True for name in self.__slots__: ret = ret and getattr(self, name) == getattr(other, name) return ret
Batch = collections.namedtuple('Batch', 'type arguments messages')
[docs]class IrcState(IrcCommandDispatcher, log.Firewalled): """Maintains state of the Irc connection. Should also become smarter. """ __firewalled__ = {'addMsg': None} def __init__(self, history=None, supported=None, nicksToHostmasks=None, channels=None, capabilities_ack=None, capabilities_nak=None, capabilities_ls=None): if history is None: history = RingBuffer(conf.supybot.protocols.irc.maxHistoryLength()) if supported is None: supported = utils.InsensitivePreservingDict() if nicksToHostmasks is None: nicksToHostmasks = ircutils.IrcDict() if channels is None: channels = ircutils.IrcDict() self.capabilities_ack = capabilities_ack or set() self.capabilities_nak = capabilities_nak or set() self.capabilities_ls = capabilities_ls or {} self.ircd = None self.supported = supported self.history = history self.channels = channels self.nicksToHostmasks = nicksToHostmasks self.batches = {}
[docs] def reset(self): """Resets the state to normal, unconnected state.""" self.history.reset() self.channels.clear() self.supported.clear() self.nicksToHostmasks.clear() self.history.resize(conf.supybot.protocols.irc.maxHistoryLength()) self.batches = {}
def __reduce__(self): return (self.__class__, (self.history, self.supported, self.nicksToHostmasks, self.channels)) def __eq__(self, other): return self.history == other.history and \ self.channels == other.channels and \ self.supported == other.supported and \ self.nicksToHostmasks == other.nicksToHostmasks and \ self.batches == other.batches def __ne__(self, other): return not self == other def copy(self): ret = self.__class__() ret.history = copy.deepcopy(self.history) ret.nicksToHostmasks = copy.deepcopy(self.nicksToHostmasks) ret.channels = copy.deepcopy(self.channels) ret.batches = copy.deepcopy(self.batches) return ret def addMsg(self, irc, msg): """Updates the state based on the irc object and the message.""" self.history.append(msg) if ircutils.isUserHostmask(msg.prefix) and not msg.command == 'NICK': self.nicksToHostmasks[msg.nick] = msg.prefix if 'batch' in msg.server_tags: batch = msg.server_tags['batch'] assert batch in self.batches, \ 'Server references undeclared batch %s' % batch self.batches[batch].messages.append(msg) method = self.dispatchCommand(msg.command) if method is not None: method(irc, msg)
[docs] def getTopic(self, channel): """Returns the topic for a given channel.""" return self.channels[channel].topic
[docs] def nickToHostmask(self, nick): """Returns the hostmask for a given nick.""" return self.nicksToHostmasks[nick]
[docs] def do004(self, irc, msg): """Handles parsing the 004 reply Supported user and channel modes are cached""" # msg.args = [nick, server, ircd-version, umodes, modes, # modes that require arguments? (non-standard)] self.ircd = msg.args[2] if len(msg.args) >= 3 else msg.args[1] self.supported['umodes'] = frozenset(msg.args[3]) self.supported['chanmodes'] = frozenset(msg.args[4])
_005converters = utils.InsensitivePreservingDict({ 'modes': int, 'keylen': int, 'nicklen': int, 'userlen': int, 'hostlen': int, 'kicklen': int, 'awaylen': int, 'silence': int, 'topiclen': int, 'channellen': int, 'maxtargets': int, 'maxnicklen': int, 'maxchannels': int, 'watch': int, # DynastyNet, EnterTheGame }) def _prefixParser(s): if ')' in s: (left, right) = s.split(')') assert left[0] == '(', 'Odd PREFIX in 005: %s' % s left = left[1:] assert len(left) == len(right), 'Odd PREFIX in 005: %s' % s return dict(list(zip(left, right))) else: return dict(list(zip('ovh', s))) _005converters['prefix'] = _prefixParser del _prefixParser def _maxlistParser(s): modes = '' limits = [] pairs = s.split(',') for pair in pairs: (mode, limit) = pair.split(':', 1) modes += mode limits += (int(limit),) * len(mode) return dict(list(zip(modes, limits))) _005converters['maxlist'] = _maxlistParser del _maxlistParser def _maxbansParser(s): # IRCd using a MAXLIST style string (IRCNet) if ':' in s: modes = '' limits = [] pairs = s.split(',') for pair in pairs: (mode, limit) = pair.split(':', 1) modes += mode limits += (int(limit),) * len(mode) d = dict(list(zip(modes, limits))) assert 'b' in d return d['b'] else: return int(s) _005converters['maxbans'] = _maxbansParser del _maxbansParser def do005(self, irc, msg): for arg in msg.args[1:-1]: # 0 is nick, -1 is "are supported" if '=' in arg: (name, value) = arg.split('=', 1) converter = self._005converters.get(name, lambda x: x) try: self.supported[name] = converter(value) except Exception: log.exception('Uncaught exception in 005 converter:') log.error('Name: %s, Converter: %s', name, converter) else: self.supported[arg] = None def do352(self, irc, msg): # WHO reply. (nick, user, host) = (msg.args[5], msg.args[2], msg.args[3]) hostmask = '%s!%s@%s' % (nick, user, host) self.nicksToHostmasks[nick] = hostmask def do354(self, irc, msg): # WHOX reply. if len(msg.args) != 9 or msg.args[1] != '1': return # irc.nick 1 user ip host nick status account gecos (n, t, user, ip, host, nick, status, account, gecos) = msg.args hostmask = '%s!%s@%s' % (nick, user, host) self.nicksToHostmasks[nick] = hostmask def do353(self, irc, msg): # NAMES reply. (__, type, channel, items) = msg.args if channel not in self.channels: self.channels[channel] = ChannelState() c = self.channels[channel] for item in items.split(): if ircutils.isUserHostmask(item): name = ircutils.nickFromHostmask(item) self.nicksToHostmasks[name] = name else: name = item c.addUser(name) if type == '@': c.modes['s'] = None def doChghost(self, irc, msg): (user, host) = msg.args nick = msg.nick hostmask = '%s!%s@%s' % (nick, user, host) self.nicksToHostmasks[nick] = hostmask def doJoin(self, irc, msg): for channel in msg.args[0].split(','): if channel in self.channels: self.channels[channel].addUser(msg.nick) elif msg.nick: # It must be us. chan = ChannelState() chan.addUser(msg.nick) self.channels[channel] = chan # I don't know why this assert was here. #assert msg.nick == irc.nick, msg def do367(self, irc, msg): # Example: # :server 367 user #chan some!random@user evil!channel@op 1356276459 try: state = self.channels[msg.args[1]] except KeyError: # We have been kicked of the channel before the server replied to # the MODE +b command. pass else: state.bans.add(msg.args[2]) def doMode(self, irc, msg): channel = msg.args[0] if ircutils.isChannel(channel): # There can be user modes, as well. try: chan = self.channels[channel] except KeyError: chan = ChannelState() self.channels[channel] = chan chan.doMode(msg) def do324(self, irc, msg): channel = msg.args[1] try: chan = self.channels[channel] except KeyError: chan = ChannelState() self.channels[channel] = chan for (mode, value) in ircutils.separateModes(msg.args[2:]): modeChar = mode[1] if mode[0] == '+' and mode[1] not in 'ovh': chan.setMode(modeChar, value) elif mode[0] == '-' and mode[1] not in 'ovh': chan.unsetMode(modeChar) def do329(self, irc, msg): # This is the last part of an empty mode. channel = msg.args[1] try: chan = self.channels[channel] except KeyError: chan = ChannelState() self.channels[channel] = chan chan.created = int(msg.args[2]) def doPart(self, irc, msg): for channel in msg.args[0].split(','): try: chan = self.channels[channel] except KeyError: continue if ircutils.strEqual(msg.nick, irc.nick): del self.channels[channel] else: chan.removeUser(msg.nick) def doKick(self, irc, msg): (channel, users) = msg.args[:2] chan = self.channels[channel] for user in users.split(','): if ircutils.strEqual(user, irc.nick): del self.channels[channel] return else: chan.removeUser(user) def doQuit(self, irc, msg): channel_names = ircutils.IrcSet() for (name, channel) in self.channels.items(): if msg.nick in channel.users: channel_names.add(name) channel.removeUser(msg.nick) # Remember which channels the user was on msg.tag('channels', channel_names) if msg.nick in self.nicksToHostmasks: # If we're quitting, it may not be. del self.nicksToHostmasks[msg.nick] def doTopic(self, irc, msg): if len(msg.args) == 1: return # Empty TOPIC for information. Does not affect state. try: chan = self.channels[msg.args[0]] chan.topic = msg.args[1] except KeyError: pass # We don't have to be in a channel to send a TOPIC. def do332(self, irc, msg): chan = self.channels[msg.args[1]] chan.topic = msg.args[2] def doNick(self, irc, msg): newNick = msg.args[0] oldNick = msg.nick try: if msg.user and msg.host: # Nick messages being handed out from the bot itself won't # have the necessary prefix to make a hostmask. newHostmask = ircutils.joinHostmask(newNick,msg.user,msg.host) self.nicksToHostmasks[newNick] = newHostmask del self.nicksToHostmasks[oldNick] except KeyError: pass channel_names = ircutils.IrcSet() for (name, channel) in self.channels.items(): if msg.nick in channel.users: channel_names.add(name) channel.replaceUser(oldNick, newNick) msg.tag('channels', channel_names) def doBatch(self, irc, msg): batch_name = msg.args[0][1:] if msg.args[0].startswith('+'): batch_type = msg.args[1] batch_arguments = tuple(msg.args[2:]) self.batches[batch_name] = Batch(type=batch_type, arguments=batch_arguments, messages=[]) elif msg.args[0].startswith('-'): batch = self.batches.pop(batch_name) msg.tag('batch', batch) else: assert False, msg.args[0] def doAway(self, irc, msg): channel_names = ircutils.IrcSet() for (name, channel) in self.channels.items(): if msg.nick in channel.users: channel_names.add(name) msg.tag('channels', channel_names)
### # The basic class for handling a connection to an IRC server. Accepts # callbacks of the IrcCallback interface. Public attributes include 'driver', # 'queue', and 'state', in addition to the standard nick/user/ident attributes. ### _callbacks = []
[docs]class Irc(IrcCommandDispatcher, log.Firewalled): """The base class for an IRC connection. Handles PING commands already. """ __firewalled__ = {'die': None, 'feedMsg': None, 'takeMsg': None,} _nickSetters = set(['001', '002', '003', '004', '250', '251', '252', '254', '255', '265', '266', '372', '375', '376', '333', '353', '332', '366', '005']) # We specifically want these callbacks to be common between all Ircs, # that's why we don't do the normal None default with a check. def __init__(self, network, callbacks=_callbacks): self.zombie = False world.ircs.append(self) self.network = network self.startedAt = time.time() self.callbacks = callbacks self.state = IrcState() self.queue = IrcMsgQueue() self.fastqueue = smallqueue() self.driver = None # The driver should set this later. self._setNonResettingVariables() self._queueConnectMessages() self.startedSync = ircutils.IrcDict() self.monitoring = ircutils.IrcDict()
[docs] def isChannel(self, s): """Helper function to check whether a given string is a channel on the network this Irc object is connected to.""" kw = {} if 'chantypes' in self.state.supported: kw['chantypes'] = self.state.supported['chantypes'] if 'channellen' in self.state.supported: kw['channellen'] = self.state.supported['channellen'] return ircutils.isChannel(s, **kw)
def isNick(self, s): kw = {} if 'nicklen' in self.state.supported: kw['nicklen'] = self.state.supported['nicklen'] return ircutils.isNick(s, **kw) # This *isn't* threadsafe!
[docs] def addCallback(self, callback): """Adds a callback to the callbacks list. :param callback: A callback object :type callback: supybot.irclib.IrcCallback """ assert not self.getCallback(callback.name()) self.callbacks.append(callback) # This is the new list we're building, which will be tsorted. cbs = [] # The vertices are self.callbacks itself. Now we make the edges. edges = set() for cb in self.callbacks: (before, after) = cb.callPrecedence(self) assert cb not in after, 'cb was in its own after.' assert cb not in before, 'cb was in its own before.' for otherCb in before: edges.add((otherCb, cb)) for otherCb in after: edges.add((cb, otherCb)) def getFirsts(): firsts = set(self.callbacks) - set(cbs) for (before, after) in edges: firsts.discard(after) return firsts firsts = getFirsts() while firsts: # Then we add these to our list of cbs, and remove all edges that # originate with these cbs. for cb in firsts: cbs.append(cb) edgesToRemove = [] for edge in edges: if edge[0] is cb: edgesToRemove.append(edge) for edge in edgesToRemove: edges.remove(edge) firsts = getFirsts() assert len(cbs) == len(self.callbacks), \ 'cbs: %s, self.callbacks: %s' % (cbs, self.callbacks) self.callbacks[:] = cbs
[docs] def getCallback(self, name): """Gets a given callback by name.""" name = name.lower() for callback in self.callbacks: if callback.name().lower() == name: return callback else: return None
[docs] def removeCallback(self, name): """Removes a callback from the callback list.""" name = name.lower() def nameMatches(cb): return cb.name().lower() == name (bad, good) = utils.iter.partition(nameMatches, self.callbacks) self.callbacks[:] = good return bad
[docs] def queueMsg(self, msg): """Queues a message to be sent to the server.""" if not self.zombie: return self.queue.enqueue(msg) else: log.warning('Refusing to queue %r; %s is a zombie.', msg, self) return False
[docs] def sendMsg(self, msg): """Queues a message to be sent to the server *immediately*""" if not self.zombie: self.fastqueue.enqueue(msg) else: log.warning('Refusing to send %r; %s is a zombie.', msg, self)
def takeMsg(self): """Called by the IrcDriver; takes a message to be sent.""" if not self.callbacks: log.critical('No callbacks in %s.', self) now = time.time() msg = None if self.fastqueue: msg = self.fastqueue.dequeue() elif self.queue: if now-self.lastTake <= conf.supybot.protocols.irc.throttleTime(): log.debug('Irc.takeMsg throttling.') else: self.lastTake = now msg = self.queue.dequeue() elif self.afterConnect and \ conf.supybot.protocols.irc.ping() and \ now > self.lastping + conf.supybot.protocols.irc.ping.interval(): if self.outstandingPing: s = 'Ping sent at %s not replied to.' % \ log.timestamp(self.lastping) log.warning(s) self.feedMsg(ircmsgs.error(s)) self.driver.reconnect() elif not self.zombie: self.lastping = now now = str(int(now)) self.outstandingPing = True self.queueMsg(ircmsgs.ping(now)) if msg: for callback in reversed(self.callbacks): msg = callback.outFilter(self, msg) if msg is None: log.debug('%s.outFilter returned None.', callback.name()) return self.takeMsg() world.debugFlush() if len(str(msg)) > 512: # Yes, this violates the contract, but at this point it doesn't # matter. That's why we gotta go munging in private attributes # # I'm changing this to a log.debug to fix a possible loop in # the LogToIrc plugin. Since users can't do anything about # this issue, there's no fundamental reason to make it a # warning. log.debug('Truncating %r, message is too long.', msg) msg._str = msg._str[:500] + '\r\n' msg._len = len(str(msg)) # I don't think we should do this. Why should it matter? If it's # something important, then the server will send it back to us, # and if it's just a privmsg/notice/etc., we don't care. # On second thought, we need this for testing. if world.testing: self.state.addMsg(self, msg) log.debug('Outgoing message (%s): %s', self.network, str(msg).rstrip('\r\n')) return msg elif self.zombie: # We kill the driver here so it doesn't continue to try to # take messages from us. self.driver.die() self._reallyDie() else: return None _numericErrorCommandRe = re.compile(r'^[45][0-9][0-9]$') def feedMsg(self, msg): """Called by the IrcDriver; feeds a message received.""" msg.tag('receivedBy', self) msg.tag('receivedOn', self.network) msg.tag('receivedAt', time.time()) if msg.args and self.isChannel(msg.args[0]): channel = msg.args[0] else: channel = None preInFilter = str(msg).rstrip('\r\n') log.debug('Incoming message (%s): %s', self.network, preInFilter) # Yeah, so this is odd. Some networks (oftc) seem to give us certain # messages with our nick instead of our prefix. We'll fix that here. if msg.prefix == self.nick: log.debug('Got one of those odd nick-instead-of-prefix msgs.') msg = ircmsgs.IrcMsg(prefix=self.prefix, msg=msg) # This catches cases where we know our own nick (from sending it to the # server) but we don't yet know our prefix. if msg.nick == self.nick and self.prefix != msg.prefix: self.prefix = msg.prefix # This keeps our nick and server attributes updated. if msg.command in self._nickSetters: if msg.args[0] != self.nick: self.nick = msg.args[0] log.debug('Updating nick attribute to %s.', self.nick) if msg.prefix != self.server: self.server = msg.prefix log.debug('Updating server attribute to %s.', self.server) # Dispatch to specific handlers for commands. method = self.dispatchCommand(msg.command) if method is not None: method(msg) elif self._numericErrorCommandRe.search(msg.command): log.error('Unhandled error message from server: %r' % msg) # Now update the IrcState object. try: self.state.addMsg(self, msg) except: log.exception('Exception in update of IrcState object:') # Now call the callbacks. world.debugFlush() for callback in self.callbacks: try: m = callback.inFilter(self, msg) if not m: log.debug('%s.inFilter returned None', callback.name()) return msg = m except: log.exception('Uncaught exception in inFilter:') world.debugFlush() postInFilter = str(msg).rstrip('\r\n') if postInFilter != preInFilter: log.debug('Incoming message (post-inFilter): %s', postInFilter) for callback in self.callbacks: try: if callback is not None: callback(self, msg) except: log.exception('Uncaught exception in callback:') world.debugFlush() def die(self): """Makes the Irc object *promise* to die -- but it won't die (of its own volition) until all its queues are clear. Isn't that cool?""" self.zombie = True if not self.afterConnect: self._reallyDie() # This is useless because it's in world.ircs, so it won't be deleted until # the program exits. Just figured you might want to know. #def __del__(self): # self._reallyDie()
[docs] def reset(self): """Resets the Irc object. Called when the driver reconnects.""" self._setNonResettingVariables() self.state.reset() self.queue.reset() self.fastqueue.reset() self.startedSync.clear() for callback in self.callbacks: callback.reset() self._queueConnectMessages()
def _setNonResettingVariables(self): # Configuration stuff. network_config = conf.supybot.networks.get(self.network) def get_value(name): return getattr(network_config, name)() or \ getattr(conf.supybot, name)() self.nick = get_value('nick') # Expand variables like $version in realname. self.user = ircutils.standardSubstitute(self, None, get_value('user')) self.ident = get_value('ident') self.alternateNicks = conf.supybot.nick.alternates()[:] self.password = network_config.password() self.prefix = '%s!%s@%s' % (self.nick, self.ident, 'unset.domain') # The rest. self.lastTake = 0 self.server = 'unset' self.afterConnect = False self.startedAt = time.time() self.lastping = time.time() self.outstandingPing = False self.capNegociationEnded = False self.requireStarttls = not network_config.ssl() and \ network_config.requireStarttls() if self.requireStarttls: log.error(('STARTTLS is no longer supported. Set ' 'supybot.networks.%s.requireStarttls to False ' 'to disable it, and use supybot.networks.%s.ssl ' 'instead.') % (self.network, self.network)) self.driver.die() self._reallyDie() return self.resetSasl() def resetSasl(self): network_config = conf.supybot.networks.get(self.network) self.sasl_authenticated = False self.sasl_username = network_config.sasl.username() self.sasl_password = network_config.sasl.password() self.sasl_ecdsa_key = network_config.sasl.ecdsa_key() self.sasl_scram_state = {'step': 'uninitialized'} self.authenticate_decoder = None self.sasl_next_mechanisms = [] self.sasl_current_mechanism = None for mechanism in network_config.sasl.mechanisms(): if mechanism == 'ecdsa-nist256p-challenge' and \ ecdsa and self.sasl_username and self.sasl_ecdsa_key: self.sasl_next_mechanisms.append(mechanism) elif mechanism == 'external' and ( network_config.certfile() or conf.supybot.protocols.irc.certfile()): self.sasl_next_mechanisms.append(mechanism) elif mechanism.startswith('scram-') and scram and \ self.sasl_username and self.sasl_password: self.sasl_next_mechanisms.append(mechanism) elif mechanism == 'plain' and \ self.sasl_username and self.sasl_password: self.sasl_next_mechanisms.append(mechanism) if self.sasl_next_mechanisms: self.REQUEST_CAPABILITIES.add('sasl') REQUEST_CAPABILITIES = set(['account-notify', 'extended-join', 'multi-prefix', 'metadata-notify', 'account-tag', 'userhost-in-names', 'invite-notify', 'server-time', 'chghost', 'batch', 'away-notify']) def _queueConnectMessages(self): if self.zombie: self.driver.die() self._reallyDie() return self.sendMsg(ircmsgs.IrcMsg(command='CAP', args=('LS', '302'))) self.sendAuthenticationMessages() def sendAuthenticationMessages(self): # Notes: # * using sendMsg instead of queueMsg because these messages cannot # be throttled. if self.password: log.info('%s: Queuing PASS command, not logging the password.', self.network) self.sendMsg(ircmsgs.password(self.password)) log.debug('%s: Sending NICK command, nick is %s.', self.network, self.nick) self.sendMsg(ircmsgs.nick(self.nick)) log.debug('%s: Sending USER command, ident is %s, user is %s.', self.network, self.ident, self.user) self.sendMsg(ircmsgs.user(self.ident, self.user)) def endCapabilityNegociation(self): if not self.capNegociationEnded: self.capNegociationEnded = True self.sendMsg(ircmsgs.IrcMsg(command='CAP', args=('END',))) def sendSaslString(self, string): for chunk in ircutils.authenticate_generator(string): self.sendMsg(ircmsgs.IrcMsg(command='AUTHENTICATE', args=(chunk,))) def tryNextSaslMechanism(self): if self.sasl_next_mechanisms: self.sasl_current_mechanism = self.sasl_next_mechanisms.pop(0) self.sendMsg(ircmsgs.IrcMsg(command='AUTHENTICATE', args=(self.sasl_current_mechanism.upper(),))) elif conf.supybot.networks.get(self.network).sasl.required(): log.error('None of the configured SASL mechanisms succeeded, ' 'aborting connection.') else: self.sasl_current_mechanism = None self.endCapabilityNegociation() def filterSaslMechanisms(self, available): available = set(map(str.lower, available)) self.sasl_next_mechanisms = [ x for x in self.sasl_next_mechanisms if x.lower() in available] def doAuthenticate(self, msg): if not self.authenticate_decoder: self.authenticate_decoder = ircutils.AuthenticateDecoder() self.authenticate_decoder.feed(msg) if not self.authenticate_decoder.ready: return # Waiting for other messages string = self.authenticate_decoder.get() self.authenticate_decoder = None mechanism = self.sasl_current_mechanism if mechanism == 'ecdsa-nist256p-challenge': self.doAuthenticateEcdsa(string) elif mechanism == 'external': self.sendSaslString(b'') elif mechanism.startswith('scram-'): step = self.sasl_scram_state['step'] try: if step == 'uninitialized': log.debug('%s: starting SCRAM.', self.network) self.doAuthenticateScramFirst(mechanism) elif step == 'first-sent': log.debug('%s: received SCRAM challenge.', self.network) self.doAuthenticateScramChallenge(string) elif step == 'final-sent': log.debug('%s: finishing SCRAM.', self.network) self.doAuthenticateScramFinish(string) else: assert False except scram.ScramException: self.sendMsg(ircmsgs.IrcMsg(command='AUTHENTICATE', args=('*',))) self.tryNextSaslMechanism() elif mechanism == 'plain': authstring = b'\0'.join([ self.sasl_username.encode('utf-8'), self.sasl_username.encode('utf-8'), self.sasl_password.encode('utf-8'), ]) self.sendSaslString(authstring) def doAuthenticateEcdsa(self, string): if string == b'': self.sendSaslString(self.sasl_username.encode('utf-8')) return try: with open(self.sasl_ecdsa_key) as fd: private_key = ecdsa.SigningKey.from_pem(fd.read()) authstring = private_key.sign(string) self.sendSaslString(authstring) except (ecdsa.BadDigestError, OSError, ValueError): self.sendMsg(ircmsgs.IrcMsg(command='AUTHENTICATE', args=('*',))) self.tryNextSaslMechanism()
[docs] def doAuthenticateScramFirst(self, mechanism): """Handle sending the client-first message of SCRAM auth.""" hash_name = mechanism[len('scram-'):] if hash_name.endswith('-plus'): hash_name = hash_name[:-len('-plus')] hash_name = hash_name.upper() if hash_name not in scram.HASH_FACTORIES: log.debug('%s: SCRAM hash %r not supported, aborting.', self.network, hash_name) self.tryNextSaslMechanism() return authenticator = scram.SCRAMClientAuthenticator(hash_name, channel_binding=False) self.sasl_scram_state['authenticator'] = authenticator client_first = authenticator.start({ 'username': self.sasl_username, 'password': self.sasl_password, }) self.sendSaslString(client_first) self.sasl_scram_state['step'] = 'first-sent'
def doAuthenticateScramChallenge(self, challenge): client_final = self.sasl_scram_state['authenticator'] \ .challenge(challenge) self.sendSaslString(client_final) self.sasl_scram_state['step'] = 'final-sent' def doAuthenticateScramFinish(self, data): try: res = self.sasl_scram_state['authenticator'] \ .finish(data) except scram.BadSuccessException as e: log.warning('%s: SASL authentication failed with SCRAM error: %e', self.network, e) self.tryNextSaslMechanism() else: self.sendSaslString(b'') self.sasl_scram_state['step'] = 'authenticated' def do903(self, msg): log.info('%s: SASL authentication successful', self.network) self.sasl_authenticated = True self.endCapabilityNegociation() def do904(self, msg): log.warning('%s: SASL authentication failed', self.network) self.tryNextSaslMechanism() def do905(self, msg): log.warning('%s: SASL authentication failed because the username or ' 'password is too long.', self.network) self.tryNextSaslMechanism() def do906(self, msg): log.warning('%s: SASL authentication aborted', self.network) self.tryNextSaslMechanism() def do907(self, msg): log.warning('%s: Attempted SASL authentication when we were already ' 'authenticated.', self.network) self.tryNextSaslMechanism() def do908(self, msg): log.info('%s: Supported SASL mechanisms: %s', self.network, msg.args[1]) self.filterSaslMechanisms(set(msg.args[1].split(','))) def doCap(self, msg): subcommand = msg.args[1] if subcommand == 'ACK': self.doCapAck(msg) elif subcommand == 'NAK': self.doCapNak(msg) elif subcommand == 'LS': self.doCapLs(msg) elif subcommand == 'DEL': self.doCapDel(msg) elif subcommand == 'NEW': self.doCapNew(msg) def doCapAck(self, msg): if len(msg.args) != 3: log.warning('Bad CAP ACK from server: %r', msg) return caps = msg.args[2].split() assert caps, 'Empty list of capabilities' log.debug('%s: Server acknowledged capabilities: %L', self.network, caps) self.state.capabilities_ack.update(caps) if 'sasl' in caps: self.tryNextSaslMechanism() else: self.endCapabilityNegociation() def doCapNak(self, msg): if len(msg.args) != 3: log.warning('Bad CAP NAK from server: %r', msg) return caps = msg.args[2].split() assert caps, 'Empty list of capabilities' self.state.capabilities_nak.update(caps) log.warning('%s: Server refused capabilities: %L', self.network, caps) self.endCapabilityNegociation() def _addCapabilities(self, capstring): for item in capstring.split(): while item.startswith(('=', '~')): item = item[1:] if '=' in item: (cap, value) = item.split('=', 1) self.state.capabilities_ls[cap] = value else: self.state.capabilities_ls[item] = None def doCapLs(self, msg): if len(msg.args) == 4: # Multi-line LS if msg.args[2] != '*': log.warning('Bad CAP LS from server: %r', msg) return self._addCapabilities(msg.args[3]) elif len(msg.args) == 3: # End of LS self._addCapabilities(msg.args[2]) common_supported_capabilities = set(self.state.capabilities_ls) & \ self.REQUEST_CAPABILITIES if 'sasl' in self.state.capabilities_ls: s = self.state.capabilities_ls['sasl'] if s is not None: self.filterSaslMechanisms(set(s.split(','))) # NOTE: Capabilities are requested in alphabetic order, because # sets are unordered, and their "order" is nondeterministic. # This is needed for the tests. if common_supported_capabilities: caps = ' '.join(sorted(common_supported_capabilities)) self.sendMsg(ircmsgs.IrcMsg(command='CAP', args=('REQ', caps))) else: self.endCapabilityNegociation() else: log.warning('Bad CAP LS from server: %r', msg) return def doCapDel(self, msg): if len(msg.args) != 3: log.warning('Bad CAP DEL from server: %r', msg) return caps = msg.args[2].split() assert caps, 'Empty list of capabilities' for cap in caps: # The spec says "If capability negotiation 3.2 was used, extensions # listed MAY contain values." for CAP NEW and CAP DEL cap = cap.split('=')[0] try: del self.state.capabilities_ls[cap] except KeyError: pass try: self.state.capabilities_ack.remove(cap) except KeyError: pass def doCapNew(self, msg): if len(msg.args) != 3: log.warning('Bad CAP NEW from server: %r', msg) return caps = msg.args[2].split() assert caps, 'Empty list of capabilities' self._addCapabilities(msg.args[2]) if not self.sasl_authenticated and 'sasl' in self.state.capabilities_ls: self.resetSasl() s = self.state.capabilities_ls['sasl'] if s is not None: self.filterSaslMechanisms(set(s.split(','))) common_supported_unrequested_capabilities = ( set(self.state.capabilities_ls) & self.REQUEST_CAPABILITIES - self.state.capabilities_ack) if common_supported_unrequested_capabilities: caps = ' '.join(sorted(common_supported_unrequested_capabilities)) self.sendMsg(ircmsgs.IrcMsg(command='CAP', args=('REQ', caps)))
[docs] def monitor(self, targets): """Increment a counter of how many callbacks monitor each target; and send a MONITOR + to the server if the target is not yet monitored.""" if isinstance(targets, str): targets = [targets] not_yet_monitored = set() for target in targets: if target in self.monitoring: self.monitoring[target] += 1 else: not_yet_monitored.add(target) self.monitoring[target] = 1 if not_yet_monitored: self.queueMsg(ircmsgs.monitor('+', not_yet_monitored)) return not_yet_monitored
[docs] def unmonitor(self, targets): """Decrements a counter of how many callbacks monitor each target; and send a MONITOR - to the server if the counter drops to 0.""" if isinstance(targets, str): targets = [targets] should_be_unmonitored = set() for target in targets: self.monitoring[target] -= 1 if self.monitoring[target] == 0: del self.monitoring[target] should_be_unmonitored.add(target) if should_be_unmonitored: self.queueMsg(ircmsgs.monitor('-', should_be_unmonitored)) return should_be_unmonitored
def _getNextNick(self): if self.alternateNicks: nick = self.alternateNicks.pop(0) if '%s' in nick: network_nick = conf.supybot.networks.get(self.network).nick() if network_nick == '': nick %= conf.supybot.nick() else: nick %= network_nick return nick else: nick = conf.supybot.nick() network_nick = conf.supybot.networks.get(self.network).nick() if network_nick != '': nick = network_nick ret = nick L = list(nick) while len(L) <= 3: L.append('`') while ircutils.strEqual(ret, nick): L[random.randrange(len(L))] = utils.iter.choice('0123456789') ret = ''.join(L) return ret
[docs] def do002(self, msg): """Logs the ircd version.""" (beginning, version) = rsplit(msg.args[-1], maxsplit=1) log.info('Server %s has version %s', self.server, version)
[docs] def doPing(self, msg): """Handles PING messages.""" self.sendMsg(ircmsgs.pong(msg.args[0]))
[docs] def doPong(self, msg): """Handles PONG messages.""" self.outstandingPing = False
def do376(self, msg): log.info('Got end of MOTD from %s', self.server) self.afterConnect = True # Let's reset nicks in case we had to use a weird one. self.alternateNicks = conf.supybot.nick.alternates()[:] umodes = conf.supybot.networks.get(self.network).umodes() if umodes == '': umodes = conf.supybot.protocols.irc.umodes() supported = self.state.supported.get('umodes') if supported: acceptedchars = supported.union('+-') umodes = ''.join([m for m in umodes if m in acceptedchars]) if umodes: log.info('Sending user modes to %s: %s', self.network, umodes) self.sendMsg(ircmsgs.mode(self.nick, umodes)) do377 = do422 = do376 def do43x(self, msg, problem): if not self.afterConnect: newNick = self._getNextNick() assert newNick != self.nick log.info('Got %s: %s %s. Trying %s.', msg.command, self.nick, problem, newNick) self.sendMsg(ircmsgs.nick(newNick)) def do437(self, msg): self.do43x(msg, 'is temporarily unavailable') def do433(self, msg): self.do43x(msg, 'is in use') def do432(self, msg): self.do43x(msg, 'is not a valid nickname') def doJoin(self, msg): if msg.nick == self.nick: channel = msg.args[0] self.queueMsg(ircmsgs.who(channel, args=('%tuhnairf,1',))) # Ends with 315. self.queueMsg(ircmsgs.mode(channel)) # Ends with 329. for channel in msg.args[0].split(','): self.queueMsg(ircmsgs.mode(channel, '+b')) self.startedSync[channel] = time.time() def do315(self, msg): channel = msg.args[1] if channel in self.startedSync: now = time.time() started = self.startedSync.pop(channel) elapsed = now - started log.info('Join to %s on %s synced in %.2f seconds.', channel, self.network, elapsed)
[docs] def doError(self, msg): """Handles ERROR messages.""" log.warning('Error message from %s: %s', self.network, msg.args[0]) if not self.zombie: if msg.args[0].lower().startswith('closing link'): self.driver.reconnect() elif 'too fast' in msg.args[0]: # Connecting too fast. self.driver.reconnect(wait=True)
[docs] def doNick(self, msg): """Handles NICK messages.""" if msg.nick == self.nick: newNick = msg.args[0] self.nick = newNick (nick, user, domain) = ircutils.splitHostmask(msg.prefix) self.prefix = ircutils.joinHostmask(self.nick, user, domain) elif conf.supybot.followIdentificationThroughNickChanges(): # We use elif here because this means it's someone else's nick # change, not our own. try: id = ircdb.users.getUserId(msg.prefix) u = ircdb.users.getUser(id) except KeyError: return if u.auth: (_, user, host) = ircutils.splitHostmask(msg.prefix) newhostmask = ircutils.joinHostmask(msg.args[0], user, host) for (i, (when, authmask)) in enumerate(u.auth[:]): if ircutils.strEqual(msg.prefix, authmask): log.info('Following identification for %s: %s -> %s', u.name, authmask, newhostmask) u.auth[i] = (u.auth[i][0], newhostmask) ircdb.users.setUser(u)
def _reallyDie(self): """Makes the Irc object die. Dead.""" log.info('Irc object for %s dying.', self.network) # XXX This hasattr should be removed, I'm just putting it here because # we're so close to a release. After 0.80.0 we should remove this # and fix whatever AttributeErrors arise in the drivers themselves. if self.driver is not None and hasattr(self.driver, 'die'): self.driver.die() if self in world.ircs: world.ircs.remove(self) # Only kill the callbacks if we're the last Irc. if not world.ircs: for cb in self.callbacks: cb.die() # If we shared our list of callbacks, this ensures that # cb.die() is only called once for each callback. It's # not really necessary since we already check to make sure # we're the only Irc object, but a little robustitude never # hurt anybody. log.debug('Last Irc, clearing callbacks.') self.callbacks[:] = [] else: log.warning('Irc object killed twice: %s', utils.stackTrace()) def __hash__(self): return id(self) def __eq__(self, other): # We check isinstance here, so that if some proxy object (like those # defined in callbacks.py) has overridden __eq__, it takes precedence. if isinstance(other, self.__class__): return id(self) == id(other) else: return other.__eq__(self) def __ne__(self, other): return not (self == other) def __str__(self): return 'Irc object for %s' % self.network def __repr__(self): return '<irclib.Irc object for %s>' % self.network
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