import time import threading from pylinkirc import utils, conf from pylinkirc.log import log from pylinkirc.classes import Protocol, IrcUser, IrcServer COMMON_PREFIXMODES = [('h', 'halfop'), ('a', 'admin'), ('q', 'owner'), ('y', 'owner')] class ClientbotWrapperProtocol(Protocol): def __init__(self, irc): super().__init__(irc) self.has_eob = False # Remove conf key checks for those not needed for Clientbot. self.conf_keys -= {'recvpass', 'sendpass', 'sid', 'sidrange', 'hostname'} # This is just a fallback. Actual casemapping is fetched by handle_005() self.casemapping = 'ascii' self.caps = {} # Initialize counter-based pseudo UID generators self.uidgen = utils.PUIDGenerator('PUID') self.sidgen = utils.PUIDGenerator('PSID') # Tracks the users sent in a list of /who replies, so that users can be bursted all at once # when ENDOFWHO is received. self.who_received = set() # This stores channel->Timer object mappings for users that we're waiting for a kick # acknowledgement for. The timer is set to send a NAMES request to the uplink to prevent # things like failed KICK attempts from desyncing plugins like relay. self.kick_queue = {} # Aliases: 463 (ERR_NOPERMFORHOST), 464 (ERR_PASSWDMISMATCH), and 465 (ERR_YOUREBANNEDCREEP) # are essentially all fatal errors for connections. self.handle_463 = self.handle_464 = self.handle_465 = self.handle_error def _expandPUID(self, uid): """ Returns the real nick for the given PUID. """ if uid in self.irc.users: nick = self.irc.users[uid].nick log.debug('(%s) Mangling target PUID %s to nick %s', self.irc.name, uid, nick) return nick return uid def connect(self): """Initializes a connection to a server.""" self.has_eob = False ts = self.irc.start_ts f = self.irc.send # Enumerate our own server self.irc.sid = self.sidgen.next_sid() # Clear states from last connect self.who_received.clear() self.kick_queue.clear() sendpass = self.irc.serverdata.get("sendpass") if sendpass: f('PASS %s' % sendpass) # This is a really gross hack to get the defined NICK/IDENT/HOST/GECOS. # But this connection stuff is done before any of the spawnClient stuff in # services_support fires. self.conf_nick = self.irc.serverdata.get('pylink_nick') or conf.conf["bot"].get("nick", "PyLink") f('NICK %s' % (self.conf_nick)) ident = self.irc.serverdata.get('pylink_ident') or conf.conf["bot"].get("ident", "pylink") f('USER %s 8 * :%s' % (ident, # TODO: per net realnames or hostnames aren't implemented yet. conf.conf["bot"].get("realname", "PyLink Clientbot"))) # Note: clientbot clients are initialized with umode +i by default def spawnClient(self, nick, ident='unknown', host='unknown.host', realhost=None, modes={('i', None)}, server=None, ip='0.0.0.0', realname='', ts=None, opertype=None, manipulatable=False): """ STUB: Pretends to spawn a new client with a subset of the given options. """ server = server or self.irc.sid uid = self.uidgen.next_uid() ts = ts or int(time.time()) log.debug('(%s) spawnClient stub called, saving nick %s as PUID %s', self.irc.name, nick, uid) u = self.irc.users[uid] = IrcUser(nick, ts, uid, ident=ident, host=host, realname=realname, manipulatable=manipulatable, realhost=realhost, ip=ip) self.irc.servers[server].users.add(uid) self.irc.applyModes(uid, modes) return u def spawnServer(self, name, sid=None, uplink=None, desc=None, endburst_delay=0, internal=True): """ STUB: Pretends to spawn a new server with a subset of the given options. """ name = name.lower() sid = self.sidgen.next_sid() self.irc.servers[sid] = IrcServer(uplink, name, internal=internal) return sid def away(self, source, text): """STUB: sets away messages for clients internally.""" log.debug('(%s) away: target is %s, internal client? %s', self.irc.name, source, self.irc.isInternalClient(source)) if self.irc.users[source].away != text: if not self.irc.isInternalClient(source): log.debug('(%s) away: sending AWAY hook from %s with text %r', self.irc.name, source, text) self.irc.callHooks([source, 'AWAY', {'text': text}]) self.irc.users[source].away = text def invite(self, client, target, channel): """Invites a user to a channel.""" self.irc.send('INVITE %s %s' % (self.irc.getFriendlyName(target), channel)) def join(self, client, channel): """STUB: Joins a user to a channel.""" channel = self.irc.toLower(channel) # Only joins for the main PyLink client are actually forwarded. Others are ignored. # Note: we do not automatically add our main client to the channel state, as we # rely on the /NAMES reply to sync it up properly. if self.irc.pseudoclient and client == self.irc.pseudoclient.uid: self.irc.send('JOIN %s' % channel) # Send a /who request right after self.irc.send('WHO %s' % channel) else: self.irc.channels[channel].users.add(client) self.irc.users[client].channels.add(channel) log.debug('(%s) join: faking JOIN of client %s/%s to %s', self.irc.name, client, self.irc.getFriendlyName(client), channel) self.irc.callHooks([client, 'CLIENTBOT_JOIN', {'channel': channel}]) def kick(self, source, channel, target, reason=''): """Sends channel kicks.""" log.debug('(%s) kick: checking if target %s (nick: %s) is an internal client? %s', self.irc.name, target, self.irc.getFriendlyName(target), self.irc.isInternalClient(target)) if self.irc.isInternalClient(target): # Target was one of our virtual clients. Just remove them from the state. self.handle_part(target, 'KICK', [channel, reason]) # Send a KICK hook for message formatting. self.irc.callHooks([source, 'CLIENTBOT_KICK', {'channel': channel, 'target': target, 'text': reason}]) return self.irc.send('KICK %s %s :<%s> %s' % (channel, self._expandPUID(target), self.irc.getFriendlyName(source), reason)) # Don't update our state here: wait for the IRCd to send an acknowledgement instead. # There is essentially a 3 second wait to do this, as we send NAMES with a delay # to resync any users lost due to kicks being blocked, etc. if (channel not in self.kick_queue) or (not self.kick_queue[channel][1].is_alive()): # However, only do this if there isn't a NAMES request scheduled already. t = threading.Timer(3, lambda: self.irc.send('NAMES %s' % channel)) log.debug('(%s) kick: setting NAMES timer for %s on %s', self.irc.name, target, channel) # Store the channel, target UID, and timer object in the internal kick queue. self.kick_queue[channel] = ({target}, t) t.start() else: log.debug('(%s) kick: adding %s to kick queue for channel %s', self.irc.name, target, channel) self.kick_queue[channel][0].add(target) def message(self, source, target, text, notice=False): """Sends messages to the target.""" command = 'NOTICE' if notice else 'PRIVMSG' if self.irc.pseudoclient and self.irc.pseudoclient.uid == source: self.irc.send('%s %s :%s' % (command, self._expandPUID(target), text)) else: self.irc.callHooks([source, 'CLIENTBOT_MESSAGE', {'target': target, 'is_notice': notice, 'text': text}]) def mode(self, source, channel, modes, ts=None): """Sends channel MODE changes.""" if utils.isChannel(channel): extmodes = [] for modepair in modes: log.debug('(%s) mode: checking if %s a prefix mode: %s', self.irc.name, modepair, self.irc.prefixmodes) if modepair[0][-1] in self.irc.prefixmodes: if self.irc.isInternalClient(modepair[1]): # Ignore prefix modes for virtual internal clients. log.debug('(%s) mode: skipping virtual client prefixmode change %s', self.irc.name, modepair) continue else: # For other clients, change the mode argument to nick instead of PUID. nick = self.irc.getFriendlyName(modepair[1]) log.debug('(%s) mode: coersing mode %s argument to %s', self.irc.name, modepair, nick) modepair = (modepair[0], nick) extmodes.append(modepair) log.debug('(%s) mode: filtered modes for %s: %s', self.irc.name, channel, extmodes) if extmodes: self.irc.send('MODE %s %s' % (channel, self.irc.joinModes(extmodes))) # Don't update the state here: the IRCd sill respond with a MODE reply if successful. def nick(self, source, newnick): """STUB: Sends NICK changes.""" if self.irc.pseudoclient and source == self.irc.pseudoclient.uid: self.irc.send('NICK :%s' % newnick) # No state update here: the IRCd will respond with a NICK acknowledgement if the change succeeds. else: self.irc.callHooks([source, 'CLIENTBOT_NICK', {'newnick': newnick}]) self.irc.users[source].nick = newnick def notice(self, source, target, text): """Sends notices to the target.""" # Wrap around message(), which does all the text formatting for us. self.message(source, target, text, notice=True) def ping(self, source=None, target=None): """ Sends PING to the uplink. """ if self.irc.uplink: self.irc.send('PING %s' % self.irc.getFriendlyName(self.irc.uplink)) # Poll WHO periodically to figure out any ident/host/away status changes. for channel in self.irc.pseudoclient.channels: self.irc.send('WHO %s' % channel) def part(self, source, channel, reason=''): """STUB: Parts a user from a channel.""" self.irc.channels[channel].removeuser(source) self.irc.users[source].channels.discard(channel) # Only parts for the main PyLink client are actually forwarded. Others are ignored. if self.irc.pseudoclient and source == self.irc.pseudoclient.uid: self.irc.send('PART %s :%s' % (channel, reason)) else: self.irc.callHooks([source, 'CLIENTBOT_PART', {'channel': channel, 'text': reason}]) def quit(self, source, reason): """STUB: Quits a client.""" userdata = self.irc.users[source] self.removeClient(source) self.irc.callHooks([source, 'CLIENTBOT_QUIT', {'text': reason, 'userdata': userdata}]) def sjoin(self, server, channel, users, ts=None, modes=set()): """STUB: bursts joins from a server.""" # This stub only updates the state internally with the users # given. modes and TS are currently ignored. puids = {u[-1] for u in users} for user in puids: if self.irc.pseudoclient and self.irc.pseudoclient.uid == user: # If the SJOIN affects our main client, forward it as a regular JOIN. self.join(user, channel) else: # Otherwise, track the state for our virtual clients. self.irc.users[user].channels.add(channel) self.irc.channels[channel].users |= puids nicks = {self.irc.getFriendlyName(u) for u in puids} self.irc.callHooks([server, 'CLIENTBOT_SJOIN', {'channel': channel, 'nicks': nicks}]) def squit(self, source, target, text): """STUB: SQUITs a server.""" # What this actually does is just handle the SQUIT internally: i.e. # Removing pseudoclients and pseudoservers. squit_data = self._squit(source, 'CLIENTBOT_VIRTUAL_SQUIT', [target, text]) if squit_data.get('nicks'): self.irc.callHooks([source, 'CLIENTBOT_SQUIT', squit_data]) def _stub(self, *args): """Stub outgoing command function (does nothing).""" return kill = topic = topicBurst = knock = numeric = _stub def updateClient(self, target, field, text): """Updates the known ident, host, or realname of a client.""" if target not in self.irc.users: log.warning("(%s) Unknown target %s for updateClient()", self.irc.name, target) return u = self.irc.users[target] if field == 'IDENT' and u.ident != text: u.ident = text if not self.irc.isInternalClient(target): # We're updating the host of an external client in our state, so send the appropriate # hook payloads. self.irc.callHooks([self.irc.sid, 'CHGIDENT', {'target': target, 'newident': text}]) elif field == 'HOST' and u.host != text: u.host = text if not self.irc.isInternalClient(target): self.irc.callHooks([self.irc.sid, 'CHGHOST', {'target': target, 'newhost': text}]) elif field in ('REALNAME', 'GECOS') and u.realname != text: u.realname = text if not self.irc.isInternalClient(target): self.irc.callHooks([self.irc.sid, 'CHGNAME', {'target': target, 'newgecos': text}]) else: return # Nothing changed def handle_events(self, data): """Event handler for the RFC1459/2812 (clientbot) protocol.""" data = data.split(" ") try: args = self.parsePrefixedArgs(data) sender = args[0] command = args[1] args = args[2:] except IndexError: # Raw command without an explicit sender; assume it's being sent by our uplink. args = self.parseArgs(data) idsource = sender = self.irc.uplink command = args[0] args = args[1:] else: # PyLink as a services framework expects UIDs and SIDs for everythiung. Since we connect # as a bot here, there's no explicit user introduction, so we're going to generate # pseudo-uids and pseudo-sids as we see prefixes. if '!' not in sender: # Sender is a server name. idsource = self._getSid(sender) if idsource not in self.irc.servers: idsource = self.spawnServer(sender, internal=False) else: # Sender is a nick!user@host prefix. Split it into its relevant parts. nick, ident, host = utils.splitHostmask(sender) idsource = self.irc.nickToUid(nick) if (not idsource) and self.irc.pseudoclient: # We don't know the sender, so it most be new. idsource = self.spawnClient(nick, ident, host, server=self.irc.uplink).uid try: func = getattr(self, 'handle_'+command.lower()) except AttributeError: # unhandled command pass else: parsed_args = func(idsource, command, args) if parsed_args is not None: return [idsource, command, parsed_args] def handle_001(self, source, command, args): """ Handles 001 / RPL_WELCOME. """ # enumerate our uplink self.irc.uplink = source def handle_005(self, source, command, args): """ Handles 005 / RPL_ISUPPORT. """ self.caps.update(self.parseCapabilities(args[1:-1])) log.debug('(%s) handle_005: self.caps is %s', self.irc.name, self.caps) if 'CHANMODES' in self.caps: self.irc.cmodes['*A'], self.irc.cmodes['*B'], self.irc.cmodes['*C'], self.irc.cmodes['*D'] = \ self.caps['CHANMODES'].split(',') log.debug('(%s) handle_005: cmodes: %s', self.irc.name, self.irc.cmodes) if 'USERMODES' in self.caps: self.irc.umodes['*A'], self.irc.umodes['*B'], self.irc.umodes['*C'], self.irc.umodes['*D'] = \ self.caps['USERMODES'].split(',') log.debug('(%s) handle_005: umodes: %s', self.irc.name, self.irc.umodes) self.casemapping = self.caps.get('CASEMAPPING', self.casemapping) log.debug('(%s) handle_005: casemapping set to %s', self.irc.name, self.casemapping) if 'PREFIX' in self.caps: self.irc.prefixmodes = prefixmodes = self.parsePrefixes(self.caps['PREFIX']) log.debug('(%s) handle_005: prefix modes set to %s', self.irc.name, self.irc.prefixmodes) # Autodetect common prefix mode names. for char, modename in COMMON_PREFIXMODES: # Don't overwrite existing named mode definitions. if char in self.irc.prefixmodes and modename not in self.irc.cmodes: self.irc.cmodes[modename] = char log.debug('(%s) handle_005: autodetecting mode %s (%s) as %s', self.irc.name, char, self.irc.prefixmodes[char], modename) self.irc.connected.set() def handle_376(self, source, command, args): """ Handles end of MOTD numerics, used to start things like autoperform. """ # Run autoperform commands. for line in self.irc.serverdata.get("autoperform", []): self.irc.send(line) # Virtual endburst hook. if not self.has_eob: self.has_eob = True return {'parse_as': 'ENDBURST'} handle_422 = handle_376 def handle_353(self, source, command, args): """ Handles 353 / RPL_NAMREPLY. """ # <- :charybdis.midnight.vpn 353 ice = #test :ice @GL # Mark "@"-type channels as secret automatically, per RFC2812. channel = self.irc.toLower(args[2]) if args[1] == '@': self.irc.applyModes(channel, [('+s', None)]) names = set() modes = set() prefix_to_mode = {v:k for k, v in self.irc.prefixmodes.items()} prefixes = ''.join(self.irc.prefixmodes.values()) for name in args[-1].split(): nick = name.lstrip(prefixes) # Get the PUID for the given nick. If one doesn't exist, spawn # a new virtual user. TODO: wait for WHO responses for each nick before # spawning in order to get a real ident/host. idsource = self.irc.nickToUid(nick) or self.spawnClient(nick, server=self.irc.uplink).uid # Queue these virtual users to be joined if they're not already in the channel, # or we're waiting for a kick acknowledgment for them. if (idsource not in self.irc.channels[channel].users) or (idsource in \ self.kick_queue.get(channel, ([],))[0]): names.add(idsource) self.irc.users[idsource].channels.add(channel) # Process prefix modes for char in name: if char in self.irc.prefixmodes.values(): modes.add(('+' + prefix_to_mode[char], idsource)) else: break # Statekeeping: make sure the channel's user list is updated! self.irc.channels[channel].users |= names self.irc.applyModes(channel, modes) log.debug('(%s) handle_353: adding users %s to %s', self.irc.name, names, channel) log.debug('(%s) handle_353: adding modes %s to %s', self.irc.name, modes, channel) # Unless /WHO has already been received for the given channel, we generally send the hook # for JOIN after /who data is received, to enumerate the ident, host, and real names of # users. if names and hasattr(self.irc.channels[channel], 'who_received'): # /WHO *HAS* already been received. Send JOIN hooks here because we use this to keep # track of any failed KICK attempts sent by the relay bot. log.debug('(%s) handle_353: sending JOIN hook because /WHO was already received for %s', self.irc.name, channel) return {'channel': channel, 'users': names, 'modes': self.irc.channels[channel].modes, 'parse_as': "JOIN"} def handle_352(self, source, command, args): """ Handles 352 / RPL_WHOREPLY. """ # parameter count: 0 1 2 3 4 5 6 7 # <- :charybdis.midnight.vpn 352 ice #test ~pylink 127.0.0.1 charybdis.midnight.vpn ice H+ :0 PyLink # <- :charybdis.midnight.vpn 352 ice #test ~gl 127.0.0.1 charybdis.midnight.vpn GL H*@ :0 realname ident = args[2] host = args[3] nick = args[5] status = args[6] # Hopcount and realname field are together. We only care about the latter. realname = args[-1].split(' ', 1)[-1] uid = self.irc.nickToUid(nick) if uid is None: log.debug("(%s) Ignoring extraneous /WHO info for %s", self.irc.name, nick) return self.updateClient(uid, 'IDENT', ident) self.updateClient(uid, 'HOST', host) self.updateClient(uid, 'GECOS', realname) # The status given uses the following letters: [*][@|+] # H means here (not marked /away) # G means away is set (we'll have to fake a message because it's not given) # * means IRCop. # The rest are prefix modes. Multiple can be given by the IRCd if multiple are set log.debug('(%s) handle_352: status string on user %s: %s', self.irc.name, nick, status) if status[0] == 'G': log.debug('(%s) handle_352: calling away() with argument', self.irc.name) self.away(uid, 'Away') elif status[0] == 'H': log.debug('(%s) handle_352: calling away() without argument', self.irc.name) self.away(uid, '') # Unmark away status else: log.warning('(%s) handle_352: got wrong string %s for away status', self.irc.name, status[0]) if '*' in status: # Track IRCop status if not self.irc.isOper(uid, allowAuthed=False): # Don't send duplicate oper ups if the target is already oper. self.irc.applyModes(uid, [('+o', None)]) self.irc.callHooks([uid, 'MODE', {'target': uid, 'modes': {('+o', None)}}]) self.irc.callHooks([uid, 'CLIENT_OPERED', {'text': 'IRC Operator'}]) elif self.irc.isOper(uid, allowAuthed=False) and not self.irc.isInternalClient(uid): # Track deopers self.irc.applyModes(uid, [('-o', None)]) self.irc.callHooks([uid, 'MODE', {'target': uid, 'modes': {('-o', None)}}]) self.who_received.add(uid) def handle_315(self, source, command, args): """ Handles 315 / RPL_ENDOFWHO. """ # <- :charybdis.midnight.vpn 315 ice #test :End of /WHO list. # Join all the users in which the last batch of /who requests were received. users = self.who_received.copy() self.who_received.clear() channel = self.irc.toLower(args[1]) c = self.irc.channels[channel] c.who_received = True modes = set(c.modes) for user in users: # Fill in prefix modes of everyone when doing mock SJOIN. for mode in c.getPrefixModes(user): modechar = self.irc.cmodes.get(mode) log.debug('(%s) handle_315: adding mode %s +%s %s', self.irc.name, mode, modechar, user) if modechar: modes.add((modechar, user)) return {'channel': channel, 'users': users, 'modes': modes, 'parse_as': "JOIN"} def handle_433(self, source, command, args): # <- :millennium.overdrivenetworks.com 433 * ice :Nickname is already in use. # HACK: I don't like modifying the config entries raw, but this is difficult because # irc.pseudoclient doesn't exist as an attribute until we get run the ENDBURST stuff # in service_support (this is mapped to 005 here). self.conf_nick += '_' self.irc.serverdata['pylink_nick'] = self.conf_nick self.irc.send('NICK %s' % self.conf_nick) handle_432 = handle_437 = handle_433 def handle_join(self, source, command, args): """ Handles incoming JOINs. """ # <- :GL|!~GL@127.0.0.1 JOIN #whatever channel = self.irc.toLower(args[0]) self.join(source, channel) return {'channel': channel, 'users': [source], 'modes': self.irc.channels[channel].modes} def handle_kick(self, source, command, args): """ Handles incoming KICKs. """ # <- :GL!~gl@127.0.0.1 KICK #whatever GL| :xd channel = self.irc.toLower(args[0]) target = self.irc.nickToUid(args[1]) try: reason = args[2] except IndexError: reason = '' if channel in self.kick_queue: # Remove this client from the kick queue if present there. log.debug('(%s) kick: removing %s from kick queue for channel %s', self.irc.name, target, channel) self.kick_queue[channel][0].discard(target) if not self.kick_queue[channel][0]: log.debug('(%s) kick: cancelling kick timer for channel %s (all kicks accounted for)', self.irc.name, channel) # There aren't any kicks that failed to be acknowledged. We can remove the timer now self.kick_queue[channel][1].cancel() del self.kick_queue[channel] self.handle_part(target, 'KICK', [channel, reason]) return {'channel': channel, 'target': target, 'text': reason} def handle_mode(self, source, command, args): """Handles MODE changes.""" # <- :GL!~gl@127.0.0.1 MODE #dev +v ice # <- :ice MODE ice :+Zi target = args[0] if utils.isChannel(target): target = self.irc.toLower(target) oldobj = self.irc.channels[target].deepcopy() else: target = self.irc.nickToUid(target) oldobj = None modes = args[1:] changedmodes = self.irc.parseModes(target, modes) self.irc.applyModes(target, changedmodes) if self.irc.isInternalClient(target): log.debug('(%s) Suppressing MODE change hook for internal client %s', self.irc.name, target) return return {'target': target, 'modes': changedmodes, 'channeldata': oldobj} def handle_nick(self, source, command, args): """Handles NICK changes.""" # <- :GL|!~GL@127.0.0.1 NICK :GL_ if not self.irc.pseudoclient: # We haven't properly logged on yet, so any initial NICK should be treated as a forced # nick change for US. For example, this clause is used to handle forced nick changes # sent by ZNC, when the login nick and the actual IRC nick of the bouncer differ. # HACK: change the nick config entry so services_support knows what our main # pseudoclient is called. oldnick = self.irc.serverdata['pylink_nick'] self.irc.serverdata['pylink_nick'] = self.conf_nick = args[0] log.debug('(%s) Pre-auth FNC: Forcing configured nick to %s from %s', self.irc.name, args[0], oldnick) return oldnick = self.irc.users[source].nick self.irc.users[source].nick = args[0] return {'newnick': args[0], 'oldnick': oldnick} def handle_part(self, source, command, args): """ Handles incoming PARTs. """ # <- :GL|!~GL@127.0.0.1 PART #whatever channels = list(map(self.irc.toLower, args[0].split(','))) try: reason = args[1] except IndexError: reason = '' for channel in channels: self.irc.channels[channel].removeuser(source) self.irc.users[source].channels -= set(channels) return {'channels': channels, 'text': reason} def handle_ping(self, source, command, args): """ Handles incoming PING requests. """ self.irc.send('PONG :%s' % args[0]) def handle_pong(self, source, command, args): """ Handles incoming PONG. """ if source == self.irc.uplink: self.irc.lastping = time.time() def handle_privmsg(self, source, command, args): """Handles incoming PRIVMSG/NOTICE.""" # <- :sender PRIVMSG #dev :afasfsa # <- :sender NOTICE somenick :afasfsa target = args[0] # We use lowercase channels internally. if utils.isChannel(target): target = self.irc.toLower(target) else: target = self._getUid(target) return {'target': target, 'text': args[1]} def handle_quit(self, source, command, args): """Handles incoming QUITs.""" self.quit(source, args[0]) return {'text': args[0]} handle_notice = handle_privmsg Class = ClientbotWrapperProtocol