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PyLink/protocols/unreal.py
James Lu ae87def11f Purge c_ and u_ prefixes from named modes 
Closes #217.
2016-05-15 11:05:02 -07:00

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"""
unreal.py: UnrealIRCd 4.0 protocol module for PyLink.
"""
import time
import sys
import os
import codecs
import socket
import re
# Import hacks to access utils and classes...
curdir = os.path.dirname(__file__)
sys.path += [curdir, os.path.dirname(curdir)]
import utils
from log import log
from classes import *
from 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 _getOutgoingNick(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):
"""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.
<users> 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.')
orig_ts = self.irc.channels[channel].ts
ts = ts or orig_ts
self.updateTS(channel, ts)
changedmodes = []
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))
self.irc.channels[channel].users.update(uids)
if ts <= orig_ts:
# Only save our prefix modes in the channel state if our TS is lower than or equal to theirs.
self.irc.applyModes(channel, 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 kill(self, numeric, target, reason):
"""Sends a kill from a PyLink client/server."""
# <- :GL KILL 38QAAAAAA :hidden-1C620195!GL (test)
if (not self.irc.isInternalClient(numeric)) and \
(not self.irc.isInternalServer(numeric)):
raise LookupError('No such PyLink client/server exists.')
assert target in self.irc.users, "Unknown target %r for kill()!" % target
# The killpath doesn't really matter here...
self._send(numeric, 'KILL %s :%s!PyLink (%s)' % (target, self.irc.serverdata['hostname'], reason))
self.removeClient(target)
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/unrealself.ircd/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(" ")
# Get our protocol version :)
vline = sdesc[0].split('-', 1)
try:
protover = int(vline[0].strip('U'))
except ValueError:
raise ProtocolError("Protocol version too old! (needs at least %s "
"(Unreal 4.0.0-rc1), got something invalid; "
"is VL being sent?)" % self.min_proto_ver)
sdesc = args[-1][1:]
if protover < self.min_proto_ver:
raise ProtocolError("Protocol version too old! (needs at least %s "
"(Unreal 4.0.0-rc1), got %s)" % (self.min_proto_ver, protover))
self.irc.servers[numeric] = IrcServer(None, sname)
# 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'}
# 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()
our_ts = self.irc.channels[channel].ts
their_ts = int(args[0])
self.updateTS(channel, their_ts)
namelist = []
log.debug('(%s) handle_sjoin: got userlist %r for %r', self.irc.name, userlist, channel)
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.
if their_ts <= our_ts:
self.irc.applyModes(channel, [('+%s' % mode, user) for mode in finalprefix])
self.irc.channels[channel].users.add(user)
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:
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(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, and user modes on
the given target.
"""
# Logging in:
# <- :NickServ SVS2MODE GL +rd GL
# Logging out:
# <- :NickServ SVS2MODE GL -r+d 0
# Logging in to account from a different nick:
# <- :NickServ SVS2MODE somenick +d GL
# Handle the mode part first, the same was as SVSMODE.
mode_hook = self.handle_svsmode(sender, command, args)
self.irc.callHooks([sender, 'SVSMODE', mode_hook])
# Get the target and the account name being set. 0 for accountname
# indicates a logout.
target = self._getUid(args[0])
try:
account = args[2]
if account == '0':
account = ''
except IndexError:
# No services account change, ignore
return
else:
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_whois(self, numeric, command, args):
"""Handles WHOIS queries."""
# <- :GL WHOIS PyLink-devel :pylink-devel
# In this case, the first argument is actually the server that the
# WHOIS query is requested from - IRCds should pass these requests on
# to the server in question. Since we're a services server, we can just
# process it regardless.
# The second argument is the ACTUAL nick requested.
# The actual WHOIS handling is done protocol-independently by coreplugin.
return {'target': self._getUid(args[-1])}
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
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