""" unreal.py: UnrealIRCd 4.0 protocol module for PyLink. """ import time import sys import os import codecs import socket import re from pylinkirc import utils from pylinkirc.classes import * from pylinkirc.log import log from pylinkirc.protocols.ts6_common import * class UnrealProtocol(TS6BaseProtocol): def __init__(self, irc): super().__init__(irc) # Set our case mapping (rfc1459 maps "\" and "|" together, for example) self.casemapping = 'ascii' self.proto_ver = 4000 self.min_proto_ver = 4000 self.hook_map = {'UMODE2': 'MODE', 'SVSKILL': 'KILL', 'SVSMODE': 'MODE', 'SVS2MODE': 'MODE', 'SJOIN': 'JOIN', 'SETHOST': 'CHGHOST', 'SETIDENT': 'CHGIDENT', 'SETNAME': 'CHGNAME', 'EOS': 'ENDBURST'} self.caps = [] self.irc.prefixmodes = {'q': '~', 'a': '&', 'o': '@', 'h': '%', 'v': '+'} self.needed_caps = ["VL", "SID", "CHANMODES", "NOQUIT", "SJ3", "NICKIP", "UMODE2"] # Some command aliases self.handle_svskill = self.handle_kill # Toggle whether we're using super hack mode for Unreal 3.2 mixed links. self.mixed_link = self.irc.serverdata.get('mixed_link') if self.mixed_link: log.warning('(%s) mixed_link is experimental and may cause problems. ' 'You have been warned!', self.irc.name) def _expandPUID(self, uid): """ Returns the outgoing nick for the given UID. For PUIDs (used to store UID-less 3.2 users), this will change the PUID given to the actual user's nick, so that that the older IRCds can understand it. """ if uid in self.irc.users and '@' in uid: # UID exists and has a @ in it, meaning it's a PUID (orignick@counter style). # Return this user's nick accordingly. 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 ### OUTGOING COMMAND FUNCTIONS def spawnClient(self, nick, ident='null', host='null', realhost=None, modes=set(), server=None, ip='0.0.0.0', realname=None, ts=None, opertype='IRC Operator', manipulatable=False): """ Spawns a new client with the given options. Note: No nick collision / valid nickname checks are done here; it is up to plugins to make sure they don't introduce anything invalid. """ server = server or self.irc.sid if not self.irc.isInternalServer(server): raise ValueError('Server %r is not a PyLink server!' % server) # Unreal 4.0 uses TS6-style UIDs. They don't start from AAAAAA like other IRCd's # do, but that doesn't matter to us... uid = self.uidgen[server].next_uid() ts = ts or int(time.time()) realname = realname or self.irc.botdata['realname'] realhost = realhost or host raw_modes = self.irc.joinModes(modes) u = self.irc.users[uid] = IrcUser(nick, ts, uid, ident=ident, host=host, realname=realname, realhost=realhost, ip=ip, manipulatable=manipulatable, opertype=opertype) self.irc.applyModes(uid, modes) self.irc.servers[server].users.add(uid) # UnrealIRCd requires encoding the IP by first packing it into a binary format, # and then encoding the binary with Base64. if ip == '0.0.0.0': # Dummy IP (for services, etc.) use a single *. encoded_ip = '*' else: try: # Try encoding as IPv4 first. binary_ip = socket.inet_pton(socket.AF_INET, ip) except OSError: try: # That failed, try IPv6 next. binary_ip = socket.inet_pton(socket.AF_INET6, ip) except OSError: raise ValueError("Invalid IPv4 or IPv6 address %r." % ip) # Encode in Base64. encoded_ip = codecs.encode(binary_ip, "base64") # Now, strip the trailing \n and decode into a string again. encoded_ip = encoded_ip.strip().decode() # <- :001 UID GL 0 1441306929 gl localhost 0018S7901 0 +iowx * midnight-1C620195 fwAAAQ== :realname self._send(server, "UID {nick} 0 {ts} {ident} {realhost} {uid} 0 {modes} " "{host} * {ip} :{realname}".format(ts=ts, host=host, nick=nick, ident=ident, uid=uid, modes=raw_modes, realname=realname, realhost=realhost, ip=encoded_ip)) # Force the virtual hostname to show correctly by running SETHOST on # the user. Otherwise, Unreal will show the real host of the person # instead, which is probably not what we want. self.updateClient(uid, 'HOST', host) return u def join(self, client, channel): """Joins a PyLink client to a channel.""" channel = self.irc.toLower(channel) if not self.irc.isInternalClient(client): raise LookupError('No such PyLink client exists.') self._send(client, "JOIN %s" % channel) self.irc.channels[channel].users.add(client) self.irc.users[client].channels.add(channel) def sjoin(self, server, channel, users, ts=None, modes=set()): """Sends an SJOIN for a group of users to a channel. The sender should always be a server (SID). TS is optional, and defaults to the one we've stored in the channel state if not given. is a list of (prefix mode, UID) pairs: Example uses: sjoin('100', '#test', [('', '100AAABBC'), ('o', 100AAABBB'), ('v', '100AAADDD')]) sjoin(self.irc.sid, '#test', [('o', self.irc.pseudoclient.uid)]) Note that for UnrealIRCd, no mode data is sent in an SJOIN command, only The channel name, TS, and user list. """ # <- :001 SJOIN 1444361345 #test :001DJ1O02 # The nicklist consists of users joining the channel, with status prefixes for # their status ('@+', '@', '+' or ''), for example: # '@+1JJAAAAAB +2JJAAAA4C 1JJAAAADS'. channel = self.irc.toLower(channel) server = server or self.irc.sid assert users, "sjoin: No users sent?" if not server: raise LookupError('No such PyLink server exists.') changedmodes = set(modes or self.irc.channels[channel].modes) orig_ts = self.irc.channels[channel].ts ts = ts or orig_ts uids = [] namelist = [] for userpair in users: assert len(userpair) == 2, "Incorrect format of userpair: %r" % userpair prefixes, user = userpair # Unreal uses slightly different prefixes in SJOIN. +q is * instead of ~, # and +a is ~ instead of &. # &, ", and ' are used for bursting bans. sjoin_prefixes = {'q': '*', 'a': '~', 'o': '@', 'h': '%', 'v': '+'} prefixchars = ''.join([sjoin_prefixes.get(prefix, '') for prefix in prefixes]) if prefixchars: changedmodes |= {('+%s' % prefix, user) for prefix in prefixes} namelist.append(prefixchars+user) uids.append(user) try: self.irc.users[user].channels.add(channel) except KeyError: # Not initialized yet? log.debug("(%s) sjoin: KeyError trying to add %r to %r's channel list?", self.irc.name, channel, user) namelist = ' '.join(namelist) self._send(server, "SJOIN {ts} {channel} :{users}".format( ts=ts, users=namelist, channel=channel)) # Burst modes separately. No really, this is what I see UnrealIRCd do! It sends # JOINs on burst and then MODE! if modes: self.mode(server, channel, modes, ts=ts) self.irc.channels[channel].users.update(uids) self.updateTS(server, channel, ts, changedmodes) def ping(self, source=None, target=None): """Sends a PING to a target server. Periodic PINGs are sent to our uplink automatically by the Irc() internals; plugins shouldn't have to use this.""" source = source or self.irc.sid target = target or self.irc.uplink if not (target is None or source is None): self._send(source, 'PING %s %s' % (self.irc.servers[source].name, self.irc.servers[target].name)) def mode(self, numeric, target, modes, ts=None): """ Sends mode changes from a PyLink client/server. The mode list should be a list of (mode, arg) tuples, i.e. the format of utils.parseModes() output. """ # <- :unreal.midnight.vpn MODE #test +ntCo GL 1444361345 if (not self.irc.isInternalClient(numeric)) and \ (not self.irc.isInternalServer(numeric)): raise LookupError('No such PyLink client/server exists.') self.irc.applyModes(target, modes) joinedmodes = self.irc.joinModes(modes) if utils.isChannel(target): # The MODE command is used for channel mode changes only ts = ts or self.irc.channels[self.irc.toLower(target)].ts self._send(numeric, 'MODE %s %s %s' % (target, joinedmodes, ts)) else: # For user modes, the only way to set modes (for non-U:Lined servers) # is through UMODE2, which sets the modes on the caller. # U:Lines can use SVSMODE/SVS2MODE, but I won't expect people to # U:Line a PyLink daemon... if not self.irc.isInternalClient(target): raise ProtocolError('Cannot force mode change on external clients!') self._send(target, 'UMODE2 %s' % joinedmodes) def topicBurst(self, numeric, target, text): """Sends a TOPIC change from a PyLink server.""" if not self.irc.isInternalServer(numeric): raise LookupError('No such PyLink server exists.') self._send(numeric, 'TOPIC %s :%s' % (target, text)) self.irc.channels[target].topic = text self.irc.channels[target].topicset = True def updateClient(self, target, field, text): """Updates the ident, host, or realname of any connected client.""" field = field.upper() if field not in ('IDENT', 'HOST', 'REALNAME', 'GECOS'): raise NotImplementedError("Changing field %r of a client is " "unsupported by this protocol." % field) if self.irc.isInternalClient(target): # It is one of our clients, use SETIDENT/HOST/NAME. if field == 'IDENT': self.irc.users[target].ident = text self._send(target, 'SETIDENT %s' % text) elif field == 'HOST': self.irc.users[target].host = text self._send(target, 'SETHOST %s' % text) elif field in ('REALNAME', 'GECOS'): self.irc.users[target].realname = text self._send(target, 'SETNAME :%s' % text) else: # It is a client on another server, use CHGIDENT/HOST/NAME. if field == 'IDENT': self.irc.users[target].ident = text self._send(self.irc.sid, 'CHGIDENT %s %s' % (target, text)) # Send hook payloads for other plugins to listen to. self.irc.callHooks([self.irc.sid, 'CHGIDENT', {'target': target, 'newident': text}]) elif field == 'HOST': self.irc.users[target].host = text self._send(self.irc.sid, 'CHGHOST %s %s' % (target, text)) self.irc.callHooks([self.irc.sid, 'CHGHOST', {'target': target, 'newhost': text}]) elif field in ('REALNAME', 'GECOS'): self.irc.users[target].realname = text self._send(self.irc.sid, 'CHGNAME %s :%s' % (target, text)) self.irc.callHooks([self.irc.sid, 'CHGNAME', {'target': target, 'newgecos': text}]) def invite(self, numeric, target, channel): """Sends an INVITE from a PyLink client..""" if not self.irc.isInternalClient(numeric): raise LookupError('No such PyLink client exists.') self._send(numeric, 'INVITE %s %s' % (target, channel)) def knock(self, numeric, target, text): """Sends a KNOCK from a PyLink client.""" # KNOCKs in UnrealIRCd are actually just specially formatted NOTICEs, # sent to all ops in a channel. # <- :unreal.midnight.vpn NOTICE @#test :[Knock] by GL|!gl@hidden-1C620195 (test) assert utils.isChannel(target), "Can only knock on channels!" sender = self.irc.getServer(numeric) s = '[Knock] by %s (%s)' % (self.irc.getHostmask(numeric), text) self._send(sender, 'NOTICE @%s :%s' % (target, s)) ### HANDLERS def connect(self): """Initializes a connection to a server.""" ts = self.irc.start_ts self.irc.prefixmodes = {'q': '~', 'a': '&', 'o': '@', 'h': '%', 'v': '+'} # Track usages of legacy nicks. self.legacy_nickcount = 1 self.irc.umodes.update({'deaf': 'd', 'invisible': 'i', 'hidechans': 'p', 'protected': 'q', 'registered': 'r', 'snomask': 's', 'vhost': 't', 'wallops': 'w', 'bot': 'B', 'cloak': 'x', 'ssl': 'z', 'filter': 'G', 'hideoper': 'H', 'hideidle': 'I', 'regdeaf': 'R', 'servprotect': 'S', 'noctcp': 'T', 'showwhois': 'W', '*A': '', '*B': '', '*C': '', '*D': 'dipqrstwBxzGHIRSTW'}) f = self.irc.send host = self.irc.serverdata["hostname"] f('PASS :%s' % self.irc.serverdata["sendpass"]) # https://github.com/unrealircd/unrealircd/blob/2f8cb55e/doc/technical/protoctl.txt # We support the following protocol features: # SJ3 - extended SJOIN # NOQUIT - QUIT messages aren't sent for all users in a netsplit # NICKv2 - Extended NICK command, sending MODE and CHGHOST info with it # SID - Use UIDs and SIDs (Unreal 4) # VL - Sends version string in below SERVER message # UMODE2 - used for users setting modes on themselves (one less argument needed) # EAUTH - Early auth? (Unreal 4 linking protocol) # NICKIP - Extends the NICK command used for introduction (for Unreal 3.2 servers) # to include user IPs. f('PROTOCTL SJ3 NOQUIT NICKv2 VL UMODE2 PROTOCTL NICKIP EAUTH=%s SID=%s' % (self.irc.serverdata["hostname"], self.irc.sid)) sdesc = self.irc.serverdata.get('serverdesc') or self.irc.botdata['serverdesc'] f('SERVER %s 1 U%s-h6e-%s :%s' % (host, self.proto_ver, self.irc.sid, sdesc)) f('NETINFO 1 %s %s * 0 0 0 :%s' % (self.irc.start_ts, self.proto_ver, self.irc.serverdata.get("netname", self.irc.name))) self._send(self.irc.sid, 'EOS') def handle_eos(self, numeric, command, args): """EOS is used to denote end of burst.""" return {} def handle_uid(self, numeric, command, args): # <- :001 UID GL 0 1441306929 gl localhost 0018S7901 0 +iowx * midnight-1C620195 fwAAAQ== :realname # <- :001 UID GL| 0 1441389007 gl 10.120.0.6 001ZO8F03 0 +iwx * 391A9CB9.26A16454.D9847B69.IP CngABg== :realname # arguments: nick, hopcount?, ts, ident, real-host, UID, services account (0 if none), modes, # displayed host, cloaked (+x) host, base64-encoded IP, and realname nick = args[0] ts, ident, realhost, uid, accountname, modestring, host = args[2:9] if host == '*': # A single * means that there is no displayed/virtual host, and # that it's the same as the real host host = args[9] # Decode UnrealIRCd's IPs, which are stored in base64-encoded network structure raw_ip = args[10].encode() # codecs.decode only takes bytes, not str if raw_ip == b'*': # Dummy IP (for services, etc.) ip = '0.0.0.0' else: # First, decode the Base64 string into a packed binary IP address. ip = codecs.decode(raw_ip, "base64") try: # IPv4 address. ip = socket.inet_ntop(socket.AF_INET, ip) except ValueError: # IPv6 address. ip = socket.inet_ntop(socket.AF_INET6, ip) # HACK: make sure a leading ":" in the IPv6 address (e.g. ::1) # doesn't cause it to be misinterpreted as the last argument # in a line, should it be mirrored to other networks. if ip.startswith(':'): ip = '0' + ip realname = args[-1] self.irc.users[uid] = IrcUser(nick, ts, uid, ident, host, realname, realhost, ip) self.irc.servers[numeric].users.add(uid) # Handle user modes parsedmodes = self.irc.parseModes(uid, [modestring]) self.irc.applyModes(uid, parsedmodes) # The cloaked (+x) host is completely separate from the displayed host # and real host in that it is ONLY shown if the user is +x (cloak mode # enabled) but NOT +t (vHost set). We'll store this separately for now, # but more handling is needed so that plugins can update the cloak host # appropriately. self.irc.users[uid].cloaked_host = args[9] if ('+o', None) in parsedmodes: # If +o being set, call the CLIENT_OPERED internal hook. self.irc.callHooks([uid, 'CLIENT_OPERED', {'text': 'IRC Operator'}]) if ('+x', None) not in parsedmodes: # If +x is not set, update to use the person's real host. self.irc.users[uid].host = realhost # Set the accountname if present if accountname != "0": self.irc.callHooks([uid, 'CLIENT_SERVICES_LOGIN', {'text': accountname}]) return {'uid': uid, 'ts': ts, 'nick': nick, 'realhost': realhost, 'host': host, 'ident': ident, 'ip': ip} def handle_pass(self, numeric, command, args): # <- PASS :abcdefg if args[0] != self.irc.serverdata['recvpass']: raise ProtocolError("Error: RECVPASS from uplink does not match configuration!") def handle_ping(self, numeric, command, args): if numeric == self.irc.uplink: self.irc.send('PONG %s :%s' % (self.irc.serverdata['hostname'], args[-1])) def handle_pong(self, source, command, args): log.debug('(%s) Ping received from %s for %s.', self.irc.name, source, args[-1]) if source in (self.irc.uplink, self.irc.servers[self.irc.uplink].name) and args[-1] == self.irc.serverdata['hostname']: log.debug('(%s) Set self.irc.lastping.', self.irc.name) self.irc.lastping = time.time() def handle_server(self, numeric, command, args): """Handles the SERVER command, which is used for both authentication and introducing legacy (non-SID) servers.""" # <- SERVER unreal.midnight.vpn 1 :U3999-Fhin6OoEM UnrealIRCd test server sname = args[0] if numeric == self.irc.uplink and not self.irc.connected.is_set(): # We're doing authentication for cap in self.needed_caps: if cap not in self.caps: raise ProtocolError("Not all required capabilities were met " "by the remote server. Your version of UnrealIRCd " "is probably too old! (Got: %s, needed: %s)" % (sorted(self.caps), sorted(self.needed_caps))) sdesc = args[-1].split(" ", 1) # Get our protocol version. I really don't know why the version and the server # description aren't two arguments instead of one... -GLolol vline = sdesc[0].split('-', 1) sdesc = " ".join(sdesc[1:]) try: protover = int(vline[0].strip('U')) except ValueError: raise ProtocolError("Protocol version too old! (needs at least %s " "(Unreal 4.x), got something invalid; " "is VL being sent?)" % self.min_proto_ver) if protover < self.min_proto_ver: raise ProtocolError("Protocol version too old! (needs at least %s " "(Unreal 4.x), got %s)" % (self.min_proto_ver, protover)) self.irc.servers[numeric] = IrcServer(None, sname, desc=sdesc) # Set irc.connected to True, meaning that protocol negotiation passed. log.debug('(%s) self.irc.connected set!', self.irc.name) self.irc.connected.set() else: # Legacy (non-SID) servers can still be introduced using the SERVER command. # <- :services.int SERVER a.bc 2 :(H) [GL] a servername = args[0].lower() sdesc = args[-1] self.irc.servers[servername] = IrcServer(numeric, servername, desc=sdesc) return {'name': servername, 'sid': None, 'text': sdesc} def handle_sid(self, numeric, command, args): """Handles the SID command, used for introducing remote servers by our uplink.""" # <- SID services.int 2 00A :Shaltúre IRC Services sname = args[0].lower() sid = args[2] sdesc = args[-1] self.irc.servers[sid] = IrcServer(numeric, sname, desc=sdesc) return {'name': sname, 'sid': sid, 'text': sdesc} def handle_squit(self, numeric, command, args): """Handles the SQUIT command.""" # <- SQUIT services.int :Read error # Convert the server name to a SID... args[0] = self._getSid(args[0]) # Then, use the SQUIT handler in TS6BaseProtocol as usual. return super().handle_squit(numeric, 'SQUIT', args) def handle_protoctl(self, numeric, command, args): """Handles protocol negotiation.""" cmodes = {'noknock': 'K', 'limit': 'l', 'registered': 'r', 'flood_unreal': 'f', 'censor': 'G', 'noextmsg': 'n', 'invex': 'I', 'permanent': 'P', 'sslonly': 'z', 'operonly': 'O', 'moderated': 'm', 'blockcolor': 'c', 'regmoderated': 'M', 'noctcp': 'C', 'secret': 's', 'ban': 'b', 'nokick': 'Q', 'private': 'p', 'stripcolor': 'S', 'key': 'k', 'op': 'o', 'voice': 'v', 'regonly': 'R', 'noinvite': 'V', 'banexception': 'e', 'nonick': 'N', 'issecure': 'Z', 'topiclock': 't', 'nonotice': 'T', 'delayjoin': 'D', 'inviteonly': 'i'} # Make a list of all our capability names. self.caps += [arg.split('=')[0] for arg in args] # <- PROTOCTL NOQUIT NICKv2 SJOIN SJOIN2 UMODE2 VL SJ3 TKLEXT TKLEXT2 NICKIP ESVID # <- PROTOCTL CHANMODES=beI,k,l,psmntirzMQNRTOVKDdGPZSCc NICKCHARS= SID=001 MLOCK TS=1441314501 EXTSWHOIS for cap in args: if cap.startswith('SID'): self.irc.uplink = cap.split('=', 1)[1] elif cap.startswith('CHANMODES'): # Parse all the supported channel modes. supported_cmodes = cap.split('=', 1)[1] self.irc.cmodes['*A'], self.irc.cmodes['*B'], self.irc.cmodes['*C'], self.irc.cmodes['*D'] = supported_cmodes.split(',') for namedmode, modechar in cmodes.items(): if modechar in supported_cmodes: self.irc.cmodes[namedmode] = modechar self.irc.cmodes['*B'] += 'f' # Add +f to the list too, dunno why it isn't there. # Add in the supported prefix modes. self.irc.cmodes.update({'halfop': 'h', 'admin': 'a', 'owner': 'q', 'op': 'o', 'voice': 'v'}) def handle_privmsg(self, source, command, args): # Convert nicks to UIDs, where they exist. target = self._getUid(args[0]) # We use lowercase channels internally, but uppercase UIDs. if utils.isChannel(target): target = self.irc.toLower(target) return {'target': target, 'text': args[1]} handle_notice = handle_privmsg def handle_join(self, numeric, command, args): """Handles the UnrealIRCd JOIN command.""" # <- :GL JOIN #pylink,#test if args[0] == '0': # /join 0; part the user from all channels oldchans = self.irc.users[numeric].channels.copy() log.debug('(%s) Got /join 0 from %r, channel list is %r', self.irc.name, numeric, oldchans) for ch in oldchans: self.irc.channels[ch].users.discard(numeric) self.irc.users[numeric].channels.discard(ch) return {'channels': oldchans, 'text': 'Left all channels.', 'parse_as': 'PART'} else: for channel in args[0].split(','): # Normalize channel case. channel = self.irc.toLower(channel) c = self.irc.channels[channel] self.irc.users[numeric].channels.add(channel) self.irc.channels[channel].users.add(numeric) # Call hooks manually, because one JOIN command in UnrealIRCd can # have multiple channels... self.irc.callHooks([numeric, command, {'channel': channel, 'users': [numeric], 'modes': c.modes, 'ts': c.ts}]) def handle_sjoin(self, numeric, command, args): """Handles the UnrealIRCd SJOIN command.""" # <- :001 SJOIN 1444361345 #test :001DJ1O02 # memberlist should be a list of UIDs with their channel status prefixes, as # in ":001AAAAAA @001AAAAAB +001AAAAAC". # Interestingly, no modes are ever sent in this command as far as I've seen. channel = self.irc.toLower(args[1]) userlist = args[-1].split() namelist = [] log.debug('(%s) handle_sjoin: got userlist %r for %r', self.irc.name, userlist, channel) # Keep track of other modes that are added due to prefix modes being joined too. changedmodes = set(self.irc.channels[channel].modes) for userpair in userlist: if userpair.startswith("&\"'"): # TODO: handle ban bursts too # &, ", and ' entries are used for bursting bans: # https://www.unrealircd.org/files/docs/technical/serverprotocol.html#S5_1 break r = re.search(r'([^\w]*)(.*)', userpair) user = r.group(2) # Unreal uses slightly different prefixes in SJOIN. +q is * instead of ~, # and +a is ~ instead of &. modeprefix = (r.group(1) or '').replace("~", "&").replace("*", "~") finalprefix = '' assert user, 'Failed to get the UID from %r; our regex needs updating?' % userpair log.debug('(%s) handle_sjoin: got modeprefix %r for user %r', self.irc.name, modeprefix, user) for m in modeprefix: # Iterate over the mapping of prefix chars to prefixes, and # find the characters that match. for char, prefix in self.irc.prefixmodes.items(): if m == prefix: finalprefix += char namelist.append(user) self.irc.users[user].channels.add(channel) # Only merge the remote's prefix modes if their TS is smaller or equal to ours. changedmodes |= {('+%s' % mode, user) for mode in finalprefix} self.irc.channels[channel].users.add(user) our_ts = self.irc.channels[channel].ts their_ts = int(args[0]) self.updateTS(numeric, channel, their_ts, changedmodes) return {'channel': channel, 'users': namelist, 'modes': self.irc.channels[channel].modes, 'ts': their_ts} def handle_nick(self, numeric, command, args): """Handles NICK changes, and legacy NICK introductions from pre-4.0 servers.""" if self.mixed_link and len(args) > 2: # Handle legacy NICK introduction here. # I don't want to rewrite all the user introduction stuff, so I'll just reorder the arguments # so that handle_uid can handle this instead. # But since legacy nicks don't have any UIDs attached, we'll have to store the users # internally by their nicks. In other words, we need to convert from this: # <- NICK Global 3 1456843578 services novernet.com services.novernet.com 0 +ioS * :Global Noticer # & nick hopcount timestamp username hostname server service-identifier-token :realname # <- NICK GL32 2 1460221959 gl localhost unreal32.midnight.vpn 0 +iowx * fwAAAQ== :realname (with NICKIP enabled) # to this: # <- :001 UID GL 0 1441306929 gl localhost 0018S7901 0 +iowx * midnight-1C620195 fwAAAQ== :realname log.debug('(%s) got legacy NICK args: %s', self.irc.name, ' '.join(args)) new_args = args[:] # Clone the old args list servername = new_args[5].lower() # Get the name of the users' server. # Fake a UID and put it where it belongs in the new-style UID command. fake_uid = '%s@%s' % (args[0], self.legacy_nickcount) self.legacy_nickcount += 1 new_args[5] = fake_uid # Insert a fake cloaked host (just make it equal the real host, I don't care) new_args.insert(-2, args[4]) log.debug('(%s) translating legacy NICK args to: %s', self.irc.name, ' '.join(new_args)) return self.handle_uid(servername, 'UID_LEGACY', new_args) else: # Normal NICK change, just let ts6_common handle it. # :70MAAAAAA NICK GL-devel 1434744242 try: return super().handle_nick(numeric, command, args) except KeyError: log.exception('(%s) Malformed NICK command received. If you are linking PyLink to a ' 'mixed UnrealIRCd 3.2/4.0 network, enable the mixed_link option in the ' 'server config and restart your PyLink daemon.', self.irc.name) self.irc.disconnect() def handle_mode(self, numeric, command, args): # <- :unreal.midnight.vpn MODE #test +bb test!*@* *!*@bad.net # <- :unreal.midnight.vpn MODE #test +q GL 1444361345 # <- :unreal.midnight.vpn MODE #test +ntCo GL 1444361345 # <- :unreal.midnight.vpn MODE #test +mntClfo 5 [10t]:5 GL 1444361345 # <- :GL MODE #services +v GL # This seems pretty relatively inconsistent - why do some commands have a TS at the end while others don't? # Answer: the first syntax (MODE sent by SERVER) is used for channel bursts - according to Unreal 3.2 docs, # the last argument should be interpreted as a timestamp ONLY if it is a number and the sender is a server. # Ban bursting does not give any TS, nor do normal users setting modes. SAMODE is special though, it will # send 0 as a TS argument (which should be ignored unless breaking the internal channel TS is desired). # Also, we need to get rid of that extra space following the +f argument. :| if utils.isChannel(args[0]): channel = self.irc.toLower(args[0]) oldobj = self.irc.channels[channel].deepcopy() modes = list(filter(None, args[1:])) # normalize whitespace parsedmodes = self.irc.parseModes(channel, modes) if parsedmodes: if parsedmodes[0][0] == '+&': # UnrealIRCd uses a & virtual mode to denote mode bounces, meaning that an # attempt to set modes by us was rejected for some reason (usually due to # timestamps). Drop the mode change to prevent mode floods. log.debug("(%s) Received mode bounce %s in channel %s! Our TS: %s", self.irc.name, modes, channel, self.irc.channels[channel].ts) return self.irc.applyModes(channel, parsedmodes) if numeric in self.irc.servers and args[-1].isdigit(): # Sender is a server AND last arg is number. Perform TS updates. their_ts = int(args[-1]) if their_ts > 0: self.updateTS(numeric, channel, their_ts) return {'target': channel, 'modes': parsedmodes, 'oldchan': oldobj} else: log.warning("(%s) received MODE for non-channel target: %r", self.irc.name, args) raise NotImplementedError def checkCloakChange(self, uid, parsedmodes): """ Checks whether +x/-x was set in the mode query, and changes the hostname of the user given to or from their cloaked host if True. """ userobj = self.irc.users[uid] final_modes = userobj.modes oldhost = userobj.host if (('+x', None) in parsedmodes and ('t', None) not in final_modes) \ or (('-t', None) in parsedmodes and ('x', None) in final_modes): # If either: # 1) +x is being set, and the user does NOT have +t. # 2) -t is being set, but the user has +x set already. # We should update the user's host to their cloaked host and send # out a hook payload saying that the host has changed. newhost = userobj.host = userobj.cloaked_host elif ('-x', None) in parsedmodes or ('-t', None) in parsedmodes: # Otherwise, if either: # 1) -x is being set. # 2) -t is being set, but the person doesn't have +x set already. # (the case where the person DOES have +x is handled above) # Restore the person's host to the uncloaked real host. newhost = userobj.host = userobj.realhost else: # Nothing changed, just return. return if newhost != oldhost: # Only send a payload if the old and new hosts are different. self.irc.callHooks([uid, 'SETHOST', {'target': uid, 'newhost': newhost}]) def handle_svsmode(self, numeric, command, args): """Handles SVSMODE, used by services for setting user modes on others.""" # <- :source SVSMODE target +usermodes target = self._getUid(args[0]) modes = args[1:] parsedmodes = self.irc.parseModes(target, modes) self.irc.applyModes(target, parsedmodes) # If +x/-x is being set, update cloaked host info. self.checkCloakChange(target, parsedmodes) return {'target': target, 'modes': parsedmodes} def handle_svs2mode(self, sender, command, args): """ Handles SVS2MODE, which sets services login information on the given target. """ # Logging in (with account info, atheme): # <- :NickServ SVS2MODE GL +rd GL # Logging in (without account info, anope): # <- :NickServ SVS2MODE 001WCO6YK +r # Logging out (atheme): # <- :NickServ SVS2MODE GL -r+d 0 # Logging in to account from a different nick: # <- :NickServ SVS2MODE somenick +d GL # Logging in to account from a different nick (anope): # <- :NickServ SVS2MODE 001SALZ01 +d GL # <- :NickServ SVS2MODE 001SALZ01 +r target = self._getUid(args[0]) parsedmodes = self.irc.parseModes(target, args[1:]) if ('+r', None) in parsedmodes: # Umode +r is being set (log in) try: # Try to get the account name (mode argument for +d) account = args[2] except IndexError: # If one doesn't exist, make it the same as the nick, but only if the account name # wasn't set already. if not self.irc.users[target].services_account: account = self.irc.getFriendlyName(target) else: return elif ('-r', None) in parsedmodes: # Umode -r being set. if not self.irc.users[target].services_account: # User already has no account; ignore. return account = '' elif ('+d', None) in parsedmodes: # Nick identification status wasn't changed, but services account was. account = args[2] if account == '0': # 0 means logout account = '' else: return self.irc.callHooks([target, 'CLIENT_SERVICES_LOGIN', {'text': account}]) def handle_umode2(self, numeric, command, args): """Handles UMODE2, used to set user modes on oneself.""" # <- :GL UMODE2 +W parsedmodes = self.irc.parseModes(numeric, args) self.irc.applyModes(numeric, parsedmodes) if ('+o', None) in parsedmodes: # If +o being set, call the CLIENT_OPERED internal hook. self.irc.callHooks([numeric, 'CLIENT_OPERED', {'text': 'IRC Operator'}]) self.checkCloakChange(numeric, parsedmodes) return {'target': numeric, 'modes': parsedmodes} def handle_topic(self, numeric, command, args): """Handles the TOPIC command.""" # <- GL TOPIC #services GL 1444699395 :weeee # <- TOPIC #services devel.relay 1452399682 :test channel = self.irc.toLower(args[0]) topic = args[-1] setter = args[1] ts = args[2] oldtopic = self.irc.channels[channel].topic self.irc.channels[channel].topic = topic self.irc.channels[channel].topicset = True return {'channel': channel, 'setter': setter, 'ts': ts, 'text': topic, 'oldtopic': oldtopic} def handle_setident(self, numeric, command, args): """Handles SETIDENT, used for self ident changes.""" # <- :70MAAAAAB SETIDENT test self.irc.users[numeric].ident = newident = args[0] return {'target': numeric, 'newident': newident} def handle_sethost(self, numeric, command, args): """Handles CHGHOST, used for self hostname changes.""" # <- :70MAAAAAB SETIDENT some.host self.irc.users[numeric].host = newhost = args[0] # When SETHOST or CHGHOST is used, modes +xt are implicitly set on the # target. self.irc.applyModes(numeric, [('+x', None), ('+t', None)]) return {'target': numeric, 'newhost': newhost} def handle_setname(self, numeric, command, args): """Handles SETNAME, used for self real name/gecos changes.""" # <- :70MAAAAAB SETNAME :afdsafasf self.irc.users[numeric].realname = newgecos = args[0] return {'target': numeric, 'newgecos': newgecos} def handle_chgident(self, numeric, command, args): """Handles CHGIDENT, used for denoting ident changes.""" # <- :GL CHGIDENT GL test target = self._getUid(args[0]) self.irc.users[target].ident = newident = args[1] return {'target': target, 'newident': newident} def handle_chghost(self, numeric, command, args): """Handles CHGHOST, used for denoting hostname changes.""" # <- :GL CHGHOST GL some.host target = self._getUid(args[0]) self.irc.users[target].host = newhost = args[1] # When SETHOST or CHGHOST is used, modes +xt are implicitly set on the # target. self.irc.applyModes(target, [('+x', None), ('+t', None)]) return {'target': target, 'newhost': newhost} def handle_chgname(self, numeric, command, args): """Handles CHGNAME, used for denoting real name/gecos changes.""" # <- :GL CHGNAME GL :afdsafasf target = self._getUid(args[0]) self.irc.users[target].realname = newgecos = args[1] return {'target': target, 'newgecos': newgecos} def handle_invite(self, numeric, command, args): """Handles incoming INVITEs.""" # <- :GL INVITE PyLink-devel :#a target = self._getUid(args[0]) channel = args[1].lower() # We don't actually need to process this; it's just something plugins/hooks can use return {'target': target, 'channel': channel} def handle_kill(self, numeric, command, args): """Handles incoming KILLs.""" # <- :GL| KILL GLolol :hidden-1C620195!GL| (test) # Use ts6_common's handle_kill, but coerse UIDs to nicks first. new_args = [self._getUid(args[0])] new_args.extend(args[1:]) return super().handle_kill(numeric, command, new_args) Class = UnrealProtocol