mirror of
https://github.com/jlu5/PyLink.git
synced 2024-11-01 09:19:23 +01:00
314 lines
11 KiB
Python
314 lines
11 KiB
Python
"""
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nefarious.py: Nefarious IRCu protocol module for PyLink.
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"""
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import sys
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import os
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# Import hacks to access utils and classes...
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curdir = os.path.dirname(__file__)
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sys.path += [curdir, os.path.dirname(curdir)]
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import utils
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from log import log
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from classes import *
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class P10SIDGenerator():
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def __init__(self, irc):
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self.irc = irc
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try:
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query = irc.serverdata["sidrange"]
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except (KeyError, ValueError):
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raise RuntimeError('(%s) "sidrange" is missing from your server configuration block!' % irc.name)
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try:
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# Query is taken in the format MINNUM-MAXNUM, so we need
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# to get the actual number values out of that.
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self.minnum, self.maxnum = map(int, query.split('-', 1))
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except ValueError:
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raise RuntimeError('(%s) Invalid sidrange %r' % (irc.name, query))
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else:
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# Initialize a counter for the last numeric we've used.
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self.currentnum = self.minnum
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@staticmethod
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def encode(num, length=2):
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"""
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Encodes a given numeric using P10 Base64 numeric nicks, as documented at
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https://github.com/evilnet/nefarious2/blob/a29b63144/doc/p10.txt#L69-L92
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"""
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c = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789[]'
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s = ''
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# To accomplish this encoding, we divide the given value into a series of places. Much like
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# a number can be divided into hundreds, tens, and digits (e.g. 128 is 1, 2, and 8), the
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# places here add up to the value given. In the case of P10 Base64, each place can represent
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# 0 to 63. divmod() is used to get the quotient and remainder of a division operation. When
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# used on the input number and the length of our allowed characters list, the output becomes
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# the values of (the next highest base, the current base).
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places = divmod(num, len(c))
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print('places:', places)
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while places[0] >= len(c):
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# If the base one higher than ours is greater than the largest value each base can
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# represent, repeat the divmod process on that value,also keeping track of the
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# remaining values we've calculated already.
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places = divmod(places[0], len(c)) + places[1:]
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print('places:', places)
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# Expand the place values we've got to the characters list now.
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chars = [c[place] for place in places]
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s = ''.join(chars)
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# Pad up to the required string length using the first character in our list (A).
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return s.rjust(length, c[0])
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def next_sid(self):
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"""
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Returns the next available SID.
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"""
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if self.currentnum > self.maxnum:
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raise ProtocolError("Ran out of valid SIDs! Check your 'sidrange' setting and try again.")
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sid = self.encodeSID(self.currentnum)
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self.currentnum += 1
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return sid
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class P10Protocol(Protocol):
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def __init__(self, irc):
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super().__init__(irc)
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# Dictionary of UID generators (one for each server) that the protocol module will fill in.
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self.uidgen = {}
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# SID generator for P10.
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self.sidgen = P10SIDGenerator(irc)
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def _send(self, source, text):
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self.irc.send("%s %s" % (source, text))
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@staticmethod
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def _getCommand(token):
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"""Returns the command name for the given token."""
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tokens = {
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'AC': 'ACCOUNT',
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'AD': 'ADMIN',
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'LL': 'ASLL',
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'A': 'AWAY',
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'B': 'BURST',
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'CAP': 'CAP',
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'CM': 'CLEARMODE',
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'CLOSE': 'CLOSE',
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'CN': 'CNOTICE',
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'CO': 'CONNECT',
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'CP': 'CPRIVMSG',
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'C': 'CREATE',
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'DE': 'DESTRUCT',
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'DS': 'DESYNCH',
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'DIE': 'DIE',
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'DNS': 'DNS',
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'EB': 'END_OF_BURST',
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'EA': 'EOB_ACK',
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'Y': 'ERROR',
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'GET': 'GET',
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'GL': 'GLINE',
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'HASH': 'HASH',
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'HELP': 'HELP',
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'F': 'INFO',
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'I': 'INVITE',
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'ISON': 'ISON',
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'J': 'JOIN',
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'JU': 'JUPE',
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'K': 'KICK',
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'D': 'KILL',
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'LI': 'LINKS',
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'LIST': 'LIST',
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'LU': 'LUSERS',
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'MAP': 'MAP',
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'M': 'MODE',
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'MO': 'MOTD',
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'E': 'NAMES',
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'N': 'NICK',
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'O': 'NOTICE',
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'OPER': 'OPER',
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'OM': 'OPMODE',
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'L': 'PART',
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'PA': 'PASS',
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'G': 'PING',
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'Z': 'PONG',
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'POST': 'POST',
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'P': 'PRIVMSG',
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'PRIVS': 'PRIVS',
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'PROTO': 'PROTO',
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'Q': 'QUIT',
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'REHASH': 'REHASH',
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'RESET': 'RESET',
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'RESTART': 'RESTART',
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'RI': 'RPING',
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'RO': 'RPONG',
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'S': 'SERVER',
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'SERVSET': 'SERVLIST',
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'SERVSET': 'SERVSET',
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'SET': 'SET',
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'SE': 'SETTIME',
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'U': 'SILENCE',
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'SQUERY': 'SQUERY',
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'SQ': 'SQUIT',
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'R': 'STATS',
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'TI': 'TIME',
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'T': 'TOPIC',
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'TR': 'TRACE',
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'UP': 'UPING',
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'USER': 'USER',
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'USERHOST': 'USERHOST',
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'USERIP': 'USERIP',
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'V': 'VERSION',
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'WC': 'WALLCHOPS',
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'WA': 'WALLOPS',
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'WU': 'WALLUSERS',
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'WV': 'WALLVOICES',
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'H': 'WHO',
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'W': 'WHOIS',
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'X': 'WHOWAS',
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'XQ': 'XQUERY',
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'XR': 'XREPLY',
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'SN': 'SVSNICK',
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'SJ': 'SVSJOIN',
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'SH': 'SETHOST'
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}
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# If the token isn't in the list, return it raw.
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return tokens.get(token, token)
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def spawnClient(self, nick, ident='null', host='null', realhost=None, modes=set(),
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server=None, ip='0.0.0.0', realname=None, ts=None, opertype='IRC Operator',
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manipulatable=False):
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# {7N} *** NICK
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# 1 <nickname>
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# 2 <hops>
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# 3 <TS>
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# 4 <userid> <-- a.k.a ident
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# 5 <host>
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# 6 [<+modes>]
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# 7+ [<mode parameters>]
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# -3 <base64 IP>
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# -2 <numeric>
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# -1 <fullname>
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server = server or self.irc.sid
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if not self.irc.isInternalServer(server):
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raise ValueError('Server %r is not a PyLink server!' % server)
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# Create an UIDGenerator instance for every SID, so that each gets
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# distinct values.
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uid = self.uidgen.setdefault(server, utils.P10UIDGenerator(server)).next_uid()
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# Fill in all the values we need
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ts = ts or int(time.time())
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realname = realname or self.irc.botdata['realname']
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realhost = realhost or host
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raw_modes = utils.joinModes(modes)
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# Initialize an IrcUser instance
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u = self.irc.users[uid] = IrcUser(nick, ts, uid, ident=ident, host=host, realname=realname,
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realhost=realhost, ip=ip, manipulatable=manipulatable,
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opertype=opertype)
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# Fill in modes and add it to our users index
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utils.applyModes(self.irc, uid, modes)
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self.irc.servers[server].users.add(uid)
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# TODO: send IPs
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self._send(server, "N {nick} 1 {ts} {ident} {host} {modes} AAAAAA {uid} "
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":{realname}".format(ts=ts, host=host, nick=nick, ident=ident, uid=uid,
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modes=raw_modes, ip=ip, realname=realname,
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realhost=realhost))
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return u
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def join(self, client, channel):
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pass
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def ping(*args):
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pass
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def connect(self):
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"""Initializes a connection to a server."""
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ts = self.irc.start_ts
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self.irc.send("PASS :%s" % self.irc.serverdata["sendpass"])
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# {7S} *** SERVER
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# 1 <name of new server>
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# 2 <hops>
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# 3 <boot TS>
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# 4 <link TS>
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# 5 <protocol>
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# 6 <numeric of new server><max client numeric>
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# 7 <flags> <-- Mark ourselves as a service with IPv6 support (+s & +6) -GLolol
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# -1 <description of new server>
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name = self.irc.serverdata["hostname"]
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# HACK: Encode our SID everywhere, and replace it in the IrcServer index.
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old_sid = self.irc.sid
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self.irc.sid = sid = self.sidgen.encode(self.irc.serverdata["sid"])
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self.irc.servers[sid] = self.irc.servers[old_sid]
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del self.irc.servers[old_sid]
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desc = self.irc.serverdata.get('serverdesc') or self.irc.botdata['serverdesc']
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self.irc.send('SERVER %s 1 %s %s J10 %s]]] +s6 :%s' % (name, ts, ts, sid, desc))
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self._send(sid, "EB")
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self.irc.connected.set()
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def handle_events(self, data):
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"""
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Event handler for the P10 protocol.
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This passes most commands to the various handle_ABCD() functions defined elsewhere in the
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protocol modules, coersing various sender prefixes from nicks and server names to P10
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"numeric nicks", whenever possible.
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Commands sent without an explicit sender prefix are treated as originating from the uplink
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server.
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"""
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data = data.split(" ")
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args = self.parseArgs(data)
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sender = args[0]
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if sender.startswith(':'):
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# From https://github.com/evilnet/nefarious2/blob/a29b63144/doc/p10.txt#L140:
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# if source begins with a colon, it (except for the colon) is the name. otherwise, it is
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# a numeric. a P10 implementation must only send lines with a numeric source prefix.
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sender = sender[1:]
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command_token = args[1].upper()
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# If the sender isn't in numeric format, try to convert it automatically.
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sender_sid = self._getSid(sender)
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sender_uid = self._getUid(sender)
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if sender_sid in self.irc.servers:
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# Sender is a server (converting from name to SID gave a valid result).
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sender = sender_server
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elif sender_uid in self.irc.users:
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# Sender is a user (converting from name to UID gave a valid result).
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sender = self._getUid(sender)
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else:
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# No sender prefix; treat as coming from uplink IRCd.
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sender = self.irc.uplink
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args = args[2:]
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try:
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# Convert the token given into a regular command, if present.
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command = self._getCommand(command_token)
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func = getattr(self, 'handle_'+command.lower())
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except AttributeError: # Unhandled command, ignore
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return
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else: # Send a hook with the hook arguments given by the handler function.
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parsed_args = func(numeric, command, args)
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if parsed_args is not None:
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return [numeric, command, parsed_args]
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Class = P10Protocol
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