mirror of https://github.com/jlu5/PyLink.git
2357 lines
98 KiB
Python
2357 lines
98 KiB
Python
"""
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classes.py - Base classes for PyLink IRC Services.
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This module contains the base classes used by PyLink, including threaded IRC
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connections and objects used to represent IRC servers, users, and channels.
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Here be dragons.
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"""
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import collections
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import collections.abc
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import functools
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import hashlib
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import ipaddress
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import queue
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import re
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import socket
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import ssl
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import string
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import textwrap
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import threading
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import time
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from . import __version__, conf, selectdriver, structures, utils, world
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from .log import log, PyLinkChannelLogger
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from .utils import ProtocolError # Compatibility with PyLink 1.x
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__all__ = ['ChannelState', 'User', 'UserMapping', 'PyLinkNetworkCore',
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'PyLinkNetworkCoreWithUtils', 'IRCNetwork', 'Server', 'Channel',
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'PUIDGenerator', 'ProtocolError']
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QUEUE_FULL = queue.Full
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### Internal classes (users, servers, channels)
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class ChannelState(structures.IRCCaseInsensitiveDict):
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"""
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A dictionary storing channels case insensitively. Channel objects are initialized on access.
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"""
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def __getitem__(self, key):
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key = self._keymangle(key)
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if key not in self._data:
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log.debug('(%s) ChannelState: creating new channel %s in memory', self._irc.name, key)
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self._data[key] = newchan = Channel(self._irc, key)
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return newchan
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return self._data[key]
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class TSObject():
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"""Base class for classes containing a type-normalized timestamp."""
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def __init__(self, *args, **kwargs):
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self._ts = int(time.time())
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@property
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def ts(self):
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return self._ts
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@ts.setter
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def ts(self, value):
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if (not isinstance(value, int)) and (not isinstance(value, float)):
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log.warning('TSObject: Got bad type for TS, converting from %s to int',
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type(value), stack_info=True)
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value = int(value)
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self._ts = value
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class User(TSObject):
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"""PyLink IRC user class."""
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def __init__(self, irc, nick, ts, uid, server, ident='null', host='null',
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realname='PyLink dummy client', realhost='null',
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ip='0.0.0.0', manipulatable=False, opertype='IRC Operator'):
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super().__init__()
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self._nick = nick
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self.lower_nick = irc.to_lower(nick)
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self.ts = ts
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self.uid = uid
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self.ident = ident
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self.host = host
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self.realhost = realhost
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self.ip = ip
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self.realname = realname
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self.modes = set() # Tracks user modes
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self.server = server
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self._irc = irc
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# Tracks PyLink identification status
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self.account = ''
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# Tracks oper type (for display only)
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self.opertype = opertype
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# Tracks external services identification status
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self.services_account = ''
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# Tracks channels the user is in
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self.channels = structures.IRCCaseInsensitiveSet(self._irc)
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# Tracks away message status
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self.away = ''
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# This sets whether the client should be marked as manipulatable.
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# Plugins like bots.py's commands should take caution against
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# manipulating these "protected" clients, to prevent desyncs and such.
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# For "serious" service clients, this should always be False.
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self.manipulatable = manipulatable
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# Cloaked host for IRCds that use it
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self.cloaked_host = None
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# Stores service bot name if applicable
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self.service = None
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# Whether the user is using SSL/TLS (None = unknown)
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self.ssl = None
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@property
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def nick(self):
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return self._nick
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@nick.setter
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def nick(self, newnick):
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oldnick = self.lower_nick
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self._nick = newnick
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self.lower_nick = self._irc.to_lower(newnick)
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# Update the irc.users bynick index:
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if oldnick in self._irc.users.bynick:
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# Remove existing value -> key mappings.
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self._irc.users.bynick[oldnick].remove(self.uid)
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# Remove now-empty keys as well.
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if not self._irc.users.bynick[oldnick]:
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del self._irc.users.bynick[oldnick]
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# Update the new nick.
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self._irc.users.bynick.setdefault(self.lower_nick, []).append(self.uid)
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def get_fields(self):
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"""
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Returns all template/substitution-friendly fields for the User object in a read-only dictionary.
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"""
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fields = self.__dict__.copy()
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# These don't really make sense in text substitutions
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for field in ('manipulatable', '_irc', 'channels', 'modes'):
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del fields[field]
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# Swap SID and server name for convenience
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fields['sid'] = self.server
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try:
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fields['server'] = self._irc.get_friendly_name(self.server)
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except KeyError:
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pass # Keep it as is (i.e. as the SID) if grabbing the server name fails
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# Network name
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fields['netname'] = self._irc.name
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# Add the nick attribute; this isn't in __dict__ because it's a property
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fields['nick'] = self._nick
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return fields
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def __repr__(self):
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return 'User(%s/%s)' % (self.uid, self.nick)
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IrcUser = User
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# Bidirectional dict based off https://stackoverflow.com/a/21894086
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class UserMapping(collections.abc.MutableMapping, structures.CopyWrapper):
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"""
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A mapping storing User objects by UID, as well as UIDs by nick via
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the 'bynick' attribute
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"""
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def __init__(self, irc, data=None):
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if data is not None:
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assert isinstance(data, dict)
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self._data = data
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else:
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self._data = {}
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self.bynick = collections.defaultdict(list)
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self._irc = irc
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def __getitem__(self, key):
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return self._data[key]
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def __setitem__(self, key, userobj):
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assert hasattr(userobj, 'lower_nick'), "Cannot add object without lower_nick attribute to UserMapping"
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if key in self._data:
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log.warning('(%s) Attempting to replace User object for %r: %r -> %r', self._irc.name,
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key, self._data.get(key), userobj)
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self._data[key] = userobj
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self.bynick.setdefault(userobj.lower_nick, []).append(key)
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def __delitem__(self, key):
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# Remove this entry from the bynick index
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if self[key].lower_nick in self.bynick:
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self.bynick[self[key].lower_nick].remove(key)
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if not self.bynick[self[key].lower_nick]:
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del self.bynick[self[key].lower_nick]
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del self._data[key]
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# Generic container methods. XXX: consider abstracting this out in structures?
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def __repr__(self):
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return "%s(%s)" % (self.__class__.__name__, self._data)
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def __iter__(self):
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return iter(self._data)
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def __len__(self):
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return len(self._data)
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def __contains__(self, key):
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return self._data.__contains__(key)
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def __copy__(self):
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return self.__class__(self._irc, data=self._data.copy())
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class PyLinkNetworkCore(structures.CamelCaseToSnakeCase):
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"""Base IRC object for PyLink."""
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def __init__(self, netname):
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self.loghandlers = []
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self.name = netname
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self.conf = conf.conf
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if not hasattr(self, 'sid'):
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self.sid = None
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# serverdata may be overridden as a property on some protocols
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if netname in conf.conf['servers'] and not hasattr(self, 'serverdata'):
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self.serverdata = conf.conf['servers'][netname]
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self.protoname = self.__class__.__module__.split('.')[-1] # Remove leading pylinkirc.protocols.
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# Protocol stuff
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self.casemapping = 'rfc1459'
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self.hook_map = {}
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# Lists required conf keys for the server block.
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self.conf_keys = {'ip', 'port', 'hostname', 'sid', 'sidrange', 'protocol', 'sendpass',
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'recvpass'}
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# Defines a set of PyLink protocol capabilities
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self.protocol_caps = set()
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# These options depend on self.serverdata from above to be set.
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self.encoding = None
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self.connected = threading.Event()
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self._aborted = threading.Event()
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self._aborted_send = threading.Event()
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self._reply_lock = threading.RLock()
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# Sets the multiplier for autoconnect delay (grows with time).
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self.autoconnect_active_multiplier = 1
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self.was_successful = False
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self._init_vars()
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def log_setup(self):
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"""
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Initializes any channel loggers defined for the current network.
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"""
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try:
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channels = conf.conf['logging']['channels'][self.name]
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except (KeyError, TypeError): # Not set up; just ignore.
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return
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log.debug('(%s) Setting up channel logging to channels %r', self.name,
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channels)
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# Only create handlers if they haven't already been set up.
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if not self.loghandlers:
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if not isinstance(channels, dict):
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log.warning('(%s) Got invalid channel logging configuration %r; are your indentation '
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'and block commenting consistent?', self.name, channels)
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return
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for channel, chandata in channels.items():
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# Fetch the log level for this channel block.
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level = None
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if isinstance(chandata, dict):
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level = chandata.get('loglevel')
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else:
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log.warning('(%s) Got invalid channel logging pair %r: %r; are your indentation '
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'and block commenting consistent?', self.name, channel, chandata)
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handler = PyLinkChannelLogger(self, channel, level=level)
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self.loghandlers.append(handler)
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log.addHandler(handler)
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def _init_vars(self):
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"""
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(Re)sets an IRC object to its default state. This should be called when
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an IRC object is first created, and on every reconnection to a network.
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"""
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self.encoding = self.serverdata.get('encoding') or 'utf-8'
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# Tracks the main PyLink client's UID.
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self.pseudoclient = None
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# Internal variable to set the place and caller of the last command (in PM
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# or in a channel), used by fantasy command support.
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self.called_by = None
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self.called_in = None
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# Intialize the server, channel, and user indexes to be populated by
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# our protocol module.
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self.servers = {}
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self.users = UserMapping(self)
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# Two versions of the channels index exist in PyLink 2.0, and they are joined together
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# - irc._channels which implicitly creates channels on access (mostly used
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# in protocol modules)
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# - irc.channels which does not (recommended for use by plugins)
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self._channels = ChannelState(self)
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self.channels = structures.IRCCaseInsensitiveDict(self, data=self._channels._data)
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# This sets the list of supported channel and user modes: the default
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# RFC1459 modes are implied. Named modes are used here to make
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# protocol-independent code easier to write, as mode chars vary by
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# IRCd.
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# Protocol modules should add to and/or replace this with what their
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# protocol supports. This can be a hardcoded list or something
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# negotiated on connect, depending on the nature of their protocol.
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self.cmodes = {'op': 'o', 'secret': 's', 'private': 'p',
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'noextmsg': 'n', 'moderated': 'm', 'inviteonly': 'i',
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'topiclock': 't', 'limit': 'l', 'ban': 'b',
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'voice': 'v', 'key': 'k',
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# This fills in the type of mode each mode character is.
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# A-type modes are list modes (i.e. bans, ban exceptions, etc.),
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# B-type modes require an argument to both set and unset,
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# but there can only be one value at a time
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# (i.e. cmode +k).
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# C-type modes require an argument to set but not to unset
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# (one sets "+l limit" and # "-l"),
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# and D-type modes take no arguments at all.
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'*A': 'b',
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'*B': 'k',
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'*C': 'l',
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'*D': 'imnpst'}
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self.umodes = {'invisible': 'i', 'snomask': 's', 'wallops': 'w',
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'oper': 'o',
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'*A': '', '*B': '', '*C': '', '*D': 'iosw'}
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# Acting extbans such as +b m:n!u@h on InspIRCd
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self.extbans_acting = {}
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# Matching extbans such as R:account on InspIRCd and $a:account on TS6.
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self.extbans_matching = {}
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# This max nick length starts off as the config value, but may be
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# overwritten later by the protocol module if such information is
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# received. It defaults to 30.
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self.maxnicklen = self.serverdata.get('maxnicklen', 30)
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# Defines a list of supported prefix modes.
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self.prefixmodes = {'o': '@', 'v': '+'}
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# Defines the uplink SID (to be filled in by protocol module).
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self.uplink = None
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self.start_ts = int(time.time())
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# Set up channel logging for the network
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self.log_setup()
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def __repr__(self):
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return "<%s object for network %r>" % (self.__class__.__name__, self.name)
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## Stubs
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def validate_server_conf(self):
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return
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def connect(self):
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raise NotImplementedError
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def disconnect(self):
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raise NotImplementedError
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## General utility functions
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def call_hooks(self, hook_args):
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"""Calls a hook function with the given hook args."""
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numeric, command, parsed_args = hook_args
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# Always make sure TS is sent.
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if 'ts' not in parsed_args:
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parsed_args['ts'] = int(time.time())
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hook_cmd = command
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hook_map = self.hook_map
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# If the hook name is present in the protocol module's hook_map, then we
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# should set the hook name to the name that points to instead.
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# For example, plugins will read SETHOST as CHGHOST, EOS (end of sync)
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# as ENDBURST, etc.
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if command in hook_map:
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hook_cmd = hook_map[command]
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# However, individual handlers can also return a 'parse_as' key to send
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# their payload to a different hook. An example of this is "/join 0"
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# being interpreted as leaving all channels (PART).
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hook_cmd = parsed_args.get('parse_as') or hook_cmd
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log.debug('(%s) Raw hook data: [%r, %r, %r] received from %s handler '
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'(calling hook %s)', self.name, numeric, hook_cmd, parsed_args,
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command, hook_cmd)
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# Iterate over registered hook functions, catching errors accordingly.
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for hook_pair in world.hooks[hook_cmd].copy():
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hook_func = hook_pair[1]
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try:
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log.debug('(%s) Calling hook function %s from plugin "%s"', self.name,
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hook_func, hook_func.__module__)
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retcode = hook_func(self, numeric, command, parsed_args)
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if retcode is False:
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log.debug('(%s) Stopping hook loop for %r (command=%r)', self.name,
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hook_func, command)
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break
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except Exception:
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# We don't want plugins to crash our servers...
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log.exception('(%s) Unhandled exception caught in hook %r from plugin "%s"',
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self.name, hook_func, hook_func.__module__)
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log.error('(%s) The offending hook data was: %s', self.name,
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hook_args)
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continue
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def call_command(self, source, text):
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"""
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Calls a PyLink bot command. source is the caller's UID, and text is the
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full, unparsed text of the message.
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"""
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world.services['pylink'].call_cmd(self, source, text)
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def msg(self, target, text, notice=None, source=None, loopback=True, wrap=True):
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"""Handy function to send messages/notices to clients. Source
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is optional, and defaults to the main PyLink client if not specified."""
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if not text:
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return
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|
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if not (source or self.pseudoclient):
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# No explicit source set and our main client wasn't available; abort.
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return
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source = source or self.pseudoclient.uid
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def _msg(text):
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if notice:
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self.notice(source, target, text)
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cmd = 'PYLINK_SELF_NOTICE'
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else:
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self.message(source, target, text)
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cmd = 'PYLINK_SELF_PRIVMSG'
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# Determines whether we should send a hook for this msg(), to forward things like services
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# replies across relay.
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if loopback:
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self.call_hooks([source, cmd, {'target': target, 'text': text}])
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# Optionally wrap the text output.
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if wrap:
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for line in self.wrap_message(source, target, text):
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_msg(line)
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else:
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_msg(text)
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def _reply(self, text, notice=None, source=None, private=None, force_privmsg_in_private=False,
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loopback=True, wrap=True):
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"""
|
|
Core of the reply() function - replies to the last caller in the right context
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(channel or PM).
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"""
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if private is None:
|
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# Allow using private replies as the default, if no explicit setting was given.
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private = conf.conf['pylink'].get("prefer_private_replies")
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# Private reply is enabled, or the caller was originally a PM
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if private or (self.called_in in self.users):
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if not force_privmsg_in_private:
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# For private replies, the default is to override the notice=True/False argument,
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# and send replies as notices regardless. This is standard behaviour for most
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# IRC services, but can be disabled if force_privmsg_in_private is given.
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notice = True
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target = self.called_by
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else:
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target = self.called_in
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self.msg(target, text, notice=notice, source=source, loopback=loopback, wrap=wrap)
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|
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def reply(self, *args, **kwargs):
|
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"""
|
|
Replies to the last caller in the right context (channel or PM).
|
|
|
|
This function wraps around _reply() and can be monkey-patched in a thread-safe manner
|
|
to temporarily redirect plugin output to another target.
|
|
"""
|
|
with self._reply_lock:
|
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self._reply(*args, **kwargs)
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|
|
def error(self, text, **kwargs):
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"""Replies with an error to the last caller in the right context (channel or PM)."""
|
|
# This is a stub to alias error to reply
|
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self.reply("Error: %s" % text, **kwargs)
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|
|
## Configuration-based lookup functions.
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|
def version(self):
|
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"""
|
|
Returns a detailed version string including the PyLink daemon version,
|
|
the protocol module in use, and the server hostname.
|
|
"""
|
|
fullversion = 'PyLink-%s. %s :[protocol:%s, encoding:%s]' % (__version__, self.hostname(), self.protoname, self.encoding)
|
|
return fullversion
|
|
|
|
def hostname(self):
|
|
"""
|
|
Returns the server hostname used by PyLink on the given server.
|
|
"""
|
|
return self.serverdata.get('hostname', world.fallback_hostname)
|
|
|
|
def get_full_network_name(self):
|
|
"""
|
|
Returns the full network name (as defined by the "netname" option), or the
|
|
short network name if that isn't defined.
|
|
"""
|
|
return self.serverdata.get('netname', self.name)
|
|
|
|
def get_service_option(self, servicename, option, default=None, global_option=None):
|
|
"""
|
|
Returns the value of the requested service bot option on the current network, or the
|
|
global value if it is not set for this network. This function queries and returns:
|
|
|
|
1) If present, the value of the config option servers::<NETNAME>::<SERVICENAME>_<OPTION>
|
|
2) If present, the value of the config option <SERVICENAME>::<GLOBAL_OPTION>, where
|
|
<GLOBAL_OPTION> is either the 'global_option' keyword argument or <OPTION>.
|
|
3) The default value given in the 'keyword' argument.
|
|
|
|
While service bot and config option names can technically be uppercase or mixed case,
|
|
the convention is to define them in all lowercase characters.
|
|
"""
|
|
netopt = self.serverdata.get('%s_%s' % (servicename, option))
|
|
if netopt is not None:
|
|
return netopt
|
|
|
|
if global_option is not None:
|
|
option = global_option
|
|
globalopt = conf.conf.get(servicename, {}).get(option)
|
|
if globalopt is not None:
|
|
return globalopt
|
|
|
|
return default
|
|
|
|
def get_service_options(self, servicename: str, option: str, itertype: type, global_option=None):
|
|
"""
|
|
Returns a merged copy of the requested service bot option. This includes:
|
|
|
|
1) If present, the value of the config option servers::<NETNAME>::<SERVICENAME>_<OPTION> (netopt)
|
|
2) If present, the value of the config option <SERVICENAME>::<GLOBAL_OPTION>, where
|
|
<GLOBAL_OPTION> is either the 'global_option' keyword value or <OPTION> (globalopt)
|
|
|
|
For itertype, the following types are allowed:
|
|
- list: items are combined as globalopt + netopt
|
|
- dict: items are combined as {**globalopt, **netopt}
|
|
"""
|
|
netopt = self.serverdata.get('%s_%s' % (servicename, option)) or itertype()
|
|
globalopt = conf.conf.get(servicename, {}).get(global_option or option) or itertype()
|
|
return utils.merge_iterables(globalopt, netopt)
|
|
|
|
def has_cap(self, capab):
|
|
"""
|
|
Returns whether this protocol module instance has the requested capability.
|
|
"""
|
|
return capab.lower() in self.protocol_caps
|
|
|
|
## Shared helper functions
|
|
def _pre_connect(self):
|
|
"""
|
|
Implements triggers called before a network connects.
|
|
"""
|
|
self._aborted_send.clear()
|
|
self._aborted.clear()
|
|
self._init_vars()
|
|
|
|
try:
|
|
self.validate_server_conf()
|
|
except Exception as e:
|
|
log.error("(%s) Configuration error: %s", self.name, e)
|
|
raise
|
|
|
|
def _run_autoconnect(self):
|
|
"""Blocks for the autoconnect time and returns True if autoconnect is enabled."""
|
|
if world.shutting_down.is_set():
|
|
log.debug('(%s) _run_autoconnect: aborting autoconnect attempt since we are shutting down.', self.name)
|
|
return
|
|
|
|
autoconnect = self.serverdata.get('autoconnect')
|
|
|
|
# Sets the autoconnect growth multiplier (e.g. a value of 2 multiplies the autoconnect
|
|
# time by 2 on every failure, etc.)
|
|
autoconnect_multiplier = self.serverdata.get('autoconnect_multiplier', 2)
|
|
autoconnect_max = self.serverdata.get('autoconnect_max', 1800)
|
|
# These values must at least be 1.
|
|
autoconnect_multiplier = max(autoconnect_multiplier, 1)
|
|
autoconnect_max = max(autoconnect_max, 1)
|
|
|
|
log.debug('(%s) _run_autoconnect: Autoconnect delay set to %s seconds.', self.name, autoconnect)
|
|
if autoconnect is not None and autoconnect >= 1:
|
|
log.debug('(%s) _run_autoconnect: Multiplying autoconnect delay %s by %s.', self.name, autoconnect, self.autoconnect_active_multiplier)
|
|
autoconnect *= self.autoconnect_active_multiplier
|
|
# Add a cap on the max. autoconnect delay, so that we don't go on forever...
|
|
autoconnect = min(autoconnect, autoconnect_max)
|
|
|
|
log.info('(%s) _run_autoconnect: Going to auto-reconnect in %s seconds.', self.name, autoconnect)
|
|
# Continue when either self._aborted is set or the autoconnect time passes.
|
|
# Compared to time.sleep(), this allows us to stop connections quicker if we
|
|
# break while while for autoconnect.
|
|
self._aborted.clear()
|
|
self._aborted.wait(autoconnect)
|
|
|
|
# Store in the local state what the autoconnect multiplier currently is.
|
|
self.autoconnect_active_multiplier *= autoconnect_multiplier
|
|
|
|
if self not in world.networkobjects.values():
|
|
log.debug('(%s) _run_autoconnect: Stopping stale connect loop', self.name)
|
|
return
|
|
return True
|
|
|
|
else:
|
|
log.debug('(%s) _run_autoconnect: Stopping connect loop (autoconnect value %r is < 1).', self.name, autoconnect)
|
|
return
|
|
|
|
def _pre_disconnect(self):
|
|
"""
|
|
Implements triggers called before a network disconnects.
|
|
"""
|
|
self._aborted.set()
|
|
self.was_successful = self.connected.is_set()
|
|
log.debug('(%s) _pre_disconnect: got %s for was_successful state', self.name, self.was_successful)
|
|
|
|
log.debug('(%s) _pre_disconnect: Clearing self.connected state.', self.name)
|
|
self.connected.clear()
|
|
|
|
log.debug('(%s) _pre_disconnect: Removing channel logging handlers due to disconnect.', self.name)
|
|
while self.loghandlers:
|
|
log.removeHandler(self.loghandlers.pop())
|
|
|
|
def _post_disconnect(self):
|
|
"""
|
|
Implements triggers called after a network disconnects.
|
|
"""
|
|
# Internal hook signifying that a network has disconnected.
|
|
self.call_hooks([None, 'PYLINK_DISCONNECT', {'was_successful': self.was_successful}])
|
|
|
|
# Clear the to_lower cache.
|
|
self.to_lower.cache_clear()
|
|
|
|
def _remove_client(self, numeric):
|
|
"""
|
|
Internal function to remove a client from our internal state.
|
|
|
|
If the removal was successful, return the User object for the given numeric (UID)."""
|
|
for c, v in self.channels.copy().items():
|
|
v.remove_user(numeric)
|
|
# Clear empty non-permanent channels.
|
|
if not (self.channels[c].users or ((self.cmodes.get('permanent'), None) in self.channels[c].modes)):
|
|
del self.channels[c]
|
|
|
|
sid = self.get_server(numeric)
|
|
try:
|
|
userobj = self.users[numeric]
|
|
del self.users[numeric]
|
|
self.servers[sid].users.discard(numeric)
|
|
except KeyError:
|
|
log.debug('(%s) Skipping removing client %s that no longer exists', self.name, numeric,
|
|
exc_info=True)
|
|
else:
|
|
log.debug('(%s) Removing client %s from user + server state', self.name, numeric)
|
|
return userobj
|
|
|
|
## State checking functions
|
|
def nick_to_uid(self, nick, multi=False, filterfunc=None):
|
|
"""Looks up the UID of a user with the given nick, or return None if no such nick exists.
|
|
|
|
If multi is given, return all matches for nick instead of just the last result. (Return an empty list if no matches)
|
|
If filterfunc is given, filter matched users by the given function first."""
|
|
nick = self.to_lower(nick)
|
|
|
|
uids = self.users.bynick.get(nick, [])
|
|
|
|
if filterfunc:
|
|
uids = list(filter(filterfunc, uids))
|
|
|
|
if multi:
|
|
return uids
|
|
else:
|
|
if len(uids) > 1:
|
|
log.warning('(%s) Multiple UIDs found for nick %r: %r; using the last one!', self.name, nick, uids)
|
|
try:
|
|
return uids[-1]
|
|
except IndexError:
|
|
return None
|
|
|
|
def is_internal_client(self, uid):
|
|
"""
|
|
Returns whether the given UID is a PyLink client.
|
|
|
|
This returns False if the numeric doesn't exist.
|
|
"""
|
|
sid = self.get_server(uid)
|
|
if sid and self.servers[sid].internal:
|
|
return True
|
|
return False
|
|
|
|
def is_internal_server(self, sid):
|
|
"""Returns whether the given SID is an internal PyLink server."""
|
|
return (sid in self.servers and self.servers[sid].internal)
|
|
|
|
def get_server(self, uid):
|
|
"""Finds the ID of the server a user is on. Return None if the user does not exist."""
|
|
userobj = self.users.get(uid)
|
|
if userobj:
|
|
return userobj.server
|
|
|
|
def is_manipulatable_client(self, uid):
|
|
"""
|
|
Returns whether the given client is marked manipulatable for interactions
|
|
such as force-JOIN.
|
|
"""
|
|
return self.is_internal_client(uid) and self.users[uid].manipulatable
|
|
|
|
def get_service_bot(self, uid):
|
|
"""
|
|
Checks whether the given UID exists and is a registered service bot.
|
|
|
|
If True, returns the corresponding ServiceBot object.
|
|
Otherwise, return False.
|
|
"""
|
|
userobj = self.users.get(uid)
|
|
if not userobj:
|
|
return False
|
|
|
|
# Look for the "service" attribute in the User object,sname = userobj.service
|
|
# Warn if the service name we fetched isn't a registered service.
|
|
sname = userobj.service
|
|
if sname is not None and sname not in world.services.keys():
|
|
log.warning("(%s) User %s / %s had a service bot record to a service that doesn't "
|
|
"exist (%s)!", self.name, uid, userobj.nick, sname)
|
|
return world.services.get(sname)
|
|
|
|
structures._BLACKLISTED_COPY_TYPES.append(PyLinkNetworkCore)
|
|
|
|
class PyLinkNetworkCoreWithUtils(PyLinkNetworkCore):
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
# Lock for updateTS to make sure only one thread can change the channel TS at one time.
|
|
self._ts_lock = threading.Lock()
|
|
|
|
@functools.lru_cache(maxsize=8192)
|
|
def to_lower(self, text):
|
|
"""
|
|
Returns the lowercase representation of text. This respects IRC casemappings defined by the protocol module.
|
|
"""
|
|
if (not text) or (not isinstance(text, str)):
|
|
return text
|
|
if self.casemapping == 'rfc1459':
|
|
text = text.replace('{', '[')
|
|
text = text.replace('}', ']')
|
|
text = text.replace('|', '\\')
|
|
text = text.replace('~', '^')
|
|
# Encode the text as bytes first, and then lowercase it so that only ASCII characters are
|
|
# changed. Unicode in channel names, etc. *is* case sensitive!
|
|
# Interesting, a quick emperical test found that this method is actually faster than str.translate()?!
|
|
return text.encode().lower().decode()
|
|
|
|
_NICK_REGEX = r'^[A-Za-z\|\\_\[\]\{\}\^\`][A-Z0-9a-z\-\|\\_\[\]\{\}\^\`]*$'
|
|
@classmethod
|
|
def is_nick(cls, s, nicklen=None):
|
|
"""
|
|
Returns whether the string given is a valid nick.
|
|
|
|
Other platforms SHOULD redefine this if their definition of a valid nick is different."""
|
|
|
|
if nicklen and len(s) > nicklen:
|
|
return False
|
|
return bool(re.match(cls._NICK_REGEX, s))
|
|
|
|
@staticmethod
|
|
def is_channel(obj):
|
|
"""
|
|
Returns whether the item given is a valid channel (for a mapping key).
|
|
|
|
For IRC, this checks if the item's name starts with a "#".
|
|
|
|
Other platforms SHOULD redefine this if they track channels by some other format (e.g. numerical IDs).
|
|
"""
|
|
return str(obj).startswith('#')
|
|
|
|
|
|
# Modified from https://stackoverflow.com/a/106223 (RFC 1123):
|
|
# - Allow hostnames that end in '.'
|
|
# - Require at least one '.' in the hostname
|
|
_HOSTNAME_RE = re.compile(r'^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)+'
|
|
r'([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])*$')
|
|
@classmethod
|
|
def is_server_name(cls, text):
|
|
"""Returns whether the string given is a valid server name."""
|
|
return bool(cls._HOSTNAME_RE.match(text))
|
|
|
|
_HOSTMASK_RE = re.compile(r'^\S+!\S+@\S+$')
|
|
@classmethod
|
|
def is_hostmask(cls, text):
|
|
"""
|
|
Returns whether the given text is a valid hostmask (nick!user@host)
|
|
|
|
Other protocols may redefine this to meet their definition of hostmask
|
|
(i.e. some unique identifier for a user).
|
|
"""
|
|
# Band-aid patch here to prevent bad bans set by Janus forwarding people into invalid channels.
|
|
return bool(cls._HOSTMASK_RE.match(text) and '#' not in text)
|
|
|
|
# TODO: these wrappers really need to be standardized
|
|
def _get_SID(self, sname):
|
|
"""Returns the SID of a server with the given name, if present."""
|
|
name = sname.lower()
|
|
|
|
if name in self.servers:
|
|
return name
|
|
|
|
for k, v in self.servers.items():
|
|
if v.name.lower() == name:
|
|
return k
|
|
else:
|
|
return sname # Fall back to given text instead of None
|
|
|
|
def _get_UID(self, target):
|
|
"""
|
|
Converts a nick argument to its matching UID. This differs from nick_to_uid()
|
|
in that it returns the original text instead of None if no matching nick is found.
|
|
|
|
Subclasses like Clientbot may override this to tweak the nick lookup behaviour,
|
|
e.g. by filtering virtual clients out.
|
|
"""
|
|
|
|
if target in self.users:
|
|
return target
|
|
|
|
target = self.nick_to_uid(target) or target
|
|
return target
|
|
|
|
def _squit(self, numeric, command, args):
|
|
"""Handles incoming SQUITs."""
|
|
|
|
split_server = self._get_SID(args[0])
|
|
|
|
# Normally we'd only need to check for our SID as the SQUIT target, but Nefarious
|
|
# actually uses the uplink server as the SQUIT target.
|
|
# <- ABAAE SQ nefarious.midnight.vpn 0 :test
|
|
if split_server in (self.sid, self.uplink):
|
|
raise ProtocolError('SQUIT received: (reason: %s)' % args[-1])
|
|
|
|
affected_users = []
|
|
affected_servers = [split_server]
|
|
affected_nicks = collections.defaultdict(list)
|
|
log.debug('(%s) Splitting server %s (reason: %s)', self.name, split_server, args[-1])
|
|
|
|
if split_server not in self.servers:
|
|
log.warning("(%s) Tried to split a server (%s) that didn't exist!", self.name, split_server)
|
|
return
|
|
|
|
# Prevent RuntimeError: dictionary changed size during iteration
|
|
old_servers = self.servers.copy()
|
|
old_channels = self._channels.copy()
|
|
|
|
# Cycle through our list of servers. If any server's uplink is the one that is being SQUIT,
|
|
# remove them and all their users too.
|
|
for sid, data in old_servers.items():
|
|
if data.uplink == split_server:
|
|
log.debug('Server %s also hosts server %s, removing those users too...', split_server, sid)
|
|
# Recursively run SQUIT on any other hubs this server may have been connected to.
|
|
args = self._squit(sid, 'SQUIT', [sid, "0",
|
|
"PyLink: Automatically splitting leaf servers of %s" % sid])
|
|
affected_users += args['users']
|
|
affected_servers += args['affected_servers']
|
|
|
|
for user in self.servers[split_server].users.copy():
|
|
affected_users.append(user)
|
|
nick = self.users[user].nick
|
|
|
|
# Nicks affected is channel specific for SQUIT:. This makes Clientbot's SQUIT relaying
|
|
# much easier to implement.
|
|
for name, cdata in old_channels.items():
|
|
if user in cdata.users:
|
|
affected_nicks[name].append(nick)
|
|
|
|
log.debug('Removing client %s (%s)', user, nick)
|
|
self._remove_client(user)
|
|
|
|
serverdata = self.servers[split_server]
|
|
sname = serverdata.name
|
|
uplink = serverdata.uplink
|
|
|
|
del self.servers[split_server]
|
|
log.debug('(%s) Netsplit affected users: %s', self.name, affected_users)
|
|
|
|
return {'target': split_server, 'users': affected_users, 'name': sname,
|
|
'uplink': uplink, 'nicks': affected_nicks, 'serverdata': serverdata,
|
|
'channeldata': old_channels, 'affected_servers': affected_servers}
|
|
|
|
@staticmethod
|
|
def _log_debug_modes(*args, **kwargs):
|
|
"""
|
|
Log debug info related to mode parsing if enabled.
|
|
"""
|
|
if conf.conf['pylink'].get('log_mode_parsers'):
|
|
log.debug(*args, **kwargs)
|
|
|
|
def _parse_modes(self, args, existing, supported_modes, is_channel=False, prefixmodes=None,
|
|
ignore_missing_args=False):
|
|
"""
|
|
parse_modes() core.
|
|
|
|
args: A mode string or a mode string split by space (type list)
|
|
existing: A set or iterable of existing modes
|
|
supported_modes: a dict of PyLink supported modes (mode names mapping
|
|
to mode chars, with *ABCD keys)
|
|
prefixmodes: a dict of prefix modes (irc.prefixmodes style)
|
|
"""
|
|
prefix = ''
|
|
if isinstance(args, str):
|
|
# If the modestring was given as a string, split it into a list.
|
|
args = args.split()
|
|
|
|
assert args, 'No valid modes were supplied!'
|
|
modestring = args[0]
|
|
args = args[1:]
|
|
|
|
existing = set(existing)
|
|
existing_casemap = {}
|
|
for modepair in existing:
|
|
arg = modepair[1]
|
|
if arg is not None:
|
|
existing_casemap[(modepair[0], self.to_lower(arg))] = modepair
|
|
else:
|
|
existing_casemap[modepair] = modepair
|
|
|
|
res = []
|
|
for mode in modestring:
|
|
if mode in '+-':
|
|
prefix = mode
|
|
else:
|
|
if not prefix:
|
|
prefix = '+'
|
|
arg = None
|
|
self._log_debug_modes('Current mode: %s%s; args left: %s', prefix, mode, args)
|
|
try:
|
|
if prefixmodes and mode in self.prefixmodes:
|
|
# We're setting a prefix mode on someone (e.g. +o user1)
|
|
self._log_debug_modes('Mode %s: This mode is a prefix mode.', mode)
|
|
arg = args.pop(0)
|
|
# Convert nicks to UIDs implicitly
|
|
arg = self._get_UID(arg)
|
|
if arg not in self.users: # Target doesn't exist, skip it.
|
|
self._log_debug_modes('(%s) Skipping setting mode "%s %s"; the '
|
|
'target doesn\'t seem to exist!', self.name,
|
|
mode, arg)
|
|
continue
|
|
elif mode in (supported_modes['*A'] + supported_modes['*B']):
|
|
# Must have parameter.
|
|
self._log_debug_modes('Mode %s: This mode must have parameter.', mode)
|
|
arg = args.pop(0)
|
|
if prefix == '-':
|
|
if mode in supported_modes['*B'] and arg == '*':
|
|
# Charybdis allows unsetting +k without actually
|
|
# knowing the key by faking the argument when unsetting
|
|
# as a single "*".
|
|
# We'd need to know the real argument of +k for us to
|
|
# be able to unset the mode.
|
|
oldarg = dict(existing).get(mode)
|
|
if oldarg:
|
|
# Set the arg to the old one on the channel.
|
|
arg = oldarg
|
|
self._log_debug_modes("Mode %s: coersing argument of '*' to %r.", mode, arg)
|
|
|
|
self._log_debug_modes('(%s) parse_modes: checking if +%s %s is in old modes list: %s; existing_casemap=%s', self.name, mode, arg, existing, existing_casemap)
|
|
|
|
arg = self.to_lower(arg)
|
|
casefolded_modepair = existing_casemap.get((mode, arg)) # Case fold arguments as needed
|
|
if casefolded_modepair not in existing:
|
|
# Ignore attempts to unset parameter modes that don't exist.
|
|
self._log_debug_modes("(%s) parse_modes: ignoring removal of non-existent list mode +%s %s; casefolded_modepair=%s", self.name, mode, arg, casefolded_modepair)
|
|
continue
|
|
arg = casefolded_modepair[1]
|
|
|
|
elif prefix == '+' and mode in supported_modes['*C']:
|
|
# Only has parameter when setting.
|
|
self._log_debug_modes('Mode %s: Only has parameter when setting.', mode)
|
|
arg = args.pop(0)
|
|
except IndexError:
|
|
logfunc = self._log_debug_modes if ignore_missing_args else log.warning
|
|
logfunc('(%s) Error while parsing mode %r: mode requires an '
|
|
'argument but none was found. (modestring: %r)',
|
|
self.name, mode, modestring)
|
|
continue # Skip this mode; don't error out completely.
|
|
newmode = (prefix + mode, arg)
|
|
res.append(newmode)
|
|
|
|
# Tentatively apply the new mode to the "existing" mode list. This is so queries
|
|
# like +b-b *!*@example.com *!*@example.com behave correctly
|
|
# (we can't rely on the original mode list to check whether a mode currently exists)
|
|
existing = self._apply_modes(existing, [newmode], is_channel=is_channel)
|
|
|
|
lowered_mode = (newmode[0][-1], self.to_lower(newmode[1]) if newmode[1] else newmode[1])
|
|
if prefix == '+' and lowered_mode not in existing_casemap:
|
|
existing_casemap[lowered_mode] = (mode, arg)
|
|
elif prefix == '-' and lowered_mode in existing_casemap:
|
|
del existing_casemap[lowered_mode]
|
|
return res
|
|
|
|
def parse_modes(self, target, args, ignore_missing_args=False):
|
|
"""Parses a modestring list into a list of (mode, argument) tuples.
|
|
['+mitl-o', '3', 'person'] => [('+m', None), ('+i', None), ('+t', None), ('+l', '3'), ('-o', 'person')]
|
|
"""
|
|
# http://www.irc.org/tech_docs/005.html
|
|
# A = Mode that adds or removes a nick or address to a list. Always has a parameter.
|
|
# B = Mode that changes a setting and always has a parameter.
|
|
# C = Mode that changes a setting and only has a parameter when set.
|
|
# D = Mode that changes a setting and never has a parameter.
|
|
|
|
is_channel = self.is_channel(target)
|
|
if not is_channel:
|
|
self._log_debug_modes('(%s) Using self.umodes for this query: %s', self.name, self.umodes)
|
|
|
|
if target not in self.users:
|
|
self._log_debug_modes('(%s) Possible desync! Mode target %s is not in the users index.', self.name, target)
|
|
return [] # Return an empty mode list
|
|
|
|
supported_modes = self.umodes
|
|
oldmodes = self.users[target].modes
|
|
prefixmodes = None
|
|
else:
|
|
self._log_debug_modes('(%s) Using self.cmodes for this query: %s', self.name, self.cmodes)
|
|
|
|
supported_modes = self.cmodes
|
|
oldmodes = self._channels[target].modes
|
|
prefixmodes = self._channels[target].prefixmodes
|
|
|
|
return self._parse_modes(args, oldmodes, supported_modes, is_channel=is_channel,
|
|
prefixmodes=prefixmodes, ignore_missing_args=ignore_missing_args)
|
|
|
|
def _apply_modes(self, old_modelist, changedmodes, is_channel=False,
|
|
prefixmodes=None):
|
|
"""
|
|
Takes a list of parsed IRC modes, and applies them onto the given target mode list.
|
|
"""
|
|
modelist = set(old_modelist)
|
|
mapping = collections.defaultdict(set)
|
|
|
|
if is_channel:
|
|
supported_modes = self.cmodes
|
|
else:
|
|
supported_modes = self.umodes
|
|
|
|
for modepair in modelist: # Make a mapping of mode chars to values
|
|
mapping[modepair[0]].add(modepair[1])
|
|
|
|
for mode in changedmodes:
|
|
# Chop off the +/- part that parse_modes gives; it's meaningless for a mode list.
|
|
try:
|
|
real_mode = (mode[0][1], mode[1])
|
|
except IndexError:
|
|
real_mode = mode
|
|
|
|
if is_channel:
|
|
if prefixmodes is not None:
|
|
# We only handle +qaohv for now. Iterate over every supported mode:
|
|
# if the IRCd supports this mode and it is the one being set, add/remove
|
|
# the person from the corresponding prefix mode list (e.g. c.prefixmodes['op']
|
|
# for ops).
|
|
for pmode, pmodelist in prefixmodes.items():
|
|
if pmode in supported_modes and real_mode[0] == supported_modes[pmode]:
|
|
if mode[0][0] == '+':
|
|
pmodelist.add(mode[1])
|
|
else:
|
|
pmodelist.discard(mode[1])
|
|
|
|
if real_mode[0] in self.prefixmodes:
|
|
# Don't add prefix modes to Channel.modes; they belong in the
|
|
# prefixmodes mapping handled above.
|
|
self._log_debug_modes('(%s) Not adding mode %s to Channel.modes because '
|
|
'it\'s a prefix mode.', self.name, str(mode))
|
|
continue
|
|
|
|
if mode[0][0] != '-': # Adding a mode; assume add if no explicit +/- is given
|
|
self._log_debug_modes('(%s) Adding mode %r on %s', self.name, real_mode, modelist)
|
|
existing = mapping.get(real_mode[0])
|
|
if existing and real_mode[0] not in supported_modes['*A']:
|
|
# The mode we're setting takes a parameter, but is not a list mode (like +beI).
|
|
# Therefore, only one version of it can exist at a time, and we must remove
|
|
# any old modepairs using the same letter. Otherwise, we'll get duplicates when,
|
|
# for example, someone sets mode "+l 30" on a channel already set "+l 25".
|
|
self._log_debug_modes('(%s) Old modes for mode %r exist in %s, removing them: %s',
|
|
self.name, real_mode, modelist, str(existing))
|
|
while existing:
|
|
oldvalue = existing.pop()
|
|
modelist.discard((real_mode[0], oldvalue))
|
|
|
|
modelist.add(real_mode)
|
|
mapping[real_mode[0]].add(real_mode[1])
|
|
else: # Removing a mode
|
|
self._log_debug_modes('(%s) Removing mode %r from %s', self.name, real_mode, modelist)
|
|
|
|
existing = mapping.get(real_mode[0])
|
|
arg = real_mode[1]
|
|
# Mode requires argument for removal (case insensitive)
|
|
if real_mode[0] in (supported_modes['*A'] + supported_modes['*B']):
|
|
modelist.discard((real_mode[0], self.to_lower(arg)))
|
|
# Mode does not require argument for removal - remove all modes entries with the same character
|
|
else:
|
|
while existing:
|
|
oldvalue = existing.pop()
|
|
if arg is None or self.to_lower(arg) == self.to_lower(oldvalue):
|
|
modelist.discard((real_mode[0], oldvalue))
|
|
self._log_debug_modes('(%s) Final modelist: %s', self.name, modelist)
|
|
return modelist
|
|
|
|
def apply_modes(self, target, changedmodes):
|
|
"""Takes a list of parsed IRC modes, and applies them on the given target.
|
|
|
|
The target can be either a channel or a user; this is handled automatically."""
|
|
is_channel = self.is_channel(target)
|
|
|
|
prefixmodes = None
|
|
try:
|
|
if is_channel:
|
|
c = self._channels[target]
|
|
old_modelist = c.modes
|
|
prefixmodes = c.prefixmodes
|
|
else:
|
|
old_modelist = self.users[target].modes
|
|
except KeyError:
|
|
log.warning('(%s) Possible desync? Mode target %s is unknown.', self.name, target)
|
|
return
|
|
|
|
modelist = self._apply_modes(old_modelist, changedmodes, is_channel=is_channel,
|
|
prefixmodes=prefixmodes)
|
|
|
|
try:
|
|
if is_channel:
|
|
self._channels[target].modes = modelist
|
|
else:
|
|
self.users[target].modes = modelist
|
|
except KeyError:
|
|
log.warning("(%s) Invalid MODE target %s (is_channel=%s)", self.name, target, is_channel)
|
|
|
|
@staticmethod
|
|
def _flip(mode):
|
|
"""Flips a mode character."""
|
|
# Make it a list first; strings don't support item assignment
|
|
mode = list(mode)
|
|
if mode[0] == '-': # Query is something like "-n"
|
|
mode[0] = '+' # Change it to "+n"
|
|
elif mode[0] == '+':
|
|
mode[0] = '-'
|
|
else: # No prefix given, assume +
|
|
mode.insert(0, '-')
|
|
return ''.join(mode)
|
|
|
|
def reverse_modes(self, target, modes, oldobj=None):
|
|
"""
|
|
IRC specific: Reverses/inverts the mode string or mode list given.
|
|
|
|
Optionally, an oldobj argument can be given to look at an earlier state of
|
|
a channel/user object, e.g. for checking the op status of a mode setter
|
|
before their modes are processed and added to the channel state.
|
|
|
|
This function allows both mode strings or mode lists. Example uses:
|
|
"+mi-lk test => "-mi+lk test"
|
|
"mi-k test => "-mi+k test"
|
|
[('+m', None), ('+r', None), ('+l', '3'), ('-o', 'person')
|
|
=> [('-m', None), ('-r', None), ('-l', None), ('+o', 'person')}]
|
|
{('s', None), ('+o', 'whoever') => [('-s', None), ('-o', 'whoever')}]
|
|
"""
|
|
origstring = isinstance(modes, str)
|
|
|
|
# If the query is a string, we have to parse it first.
|
|
if origstring:
|
|
modes = self.parse_modes(target, modes.split(" "))
|
|
|
|
# Get the current mode list first.
|
|
if self.is_channel(target):
|
|
c = oldobj or self._channels[target]
|
|
oldmodes = c.modes.copy()
|
|
possible_modes = self.cmodes.copy()
|
|
# For channels, this also includes the list of prefix modes.
|
|
possible_modes['*A'] += ''.join(self.prefixmodes)
|
|
for name, userlist in c.prefixmodes.items():
|
|
try:
|
|
# Add prefix modes to the list of old modes
|
|
oldmodes |= {(self.cmodes[name], u) for u in userlist}
|
|
except KeyError:
|
|
continue
|
|
else:
|
|
oldmodes = set(self.users[target].modes)
|
|
possible_modes = self.umodes
|
|
|
|
oldmodes_mapping = dict(oldmodes)
|
|
oldmodes_lower = {(modepair[0], self.to_lower(modepair[1]) if modepair[1] else modepair[1])
|
|
for modepair in oldmodes}
|
|
|
|
newmodes = []
|
|
self._log_debug_modes('(%s) reverse_modes: old/current mode list for %s is: %s', self.name,
|
|
target, oldmodes)
|
|
for char, arg in modes:
|
|
# Mode types:
|
|
# A = Mode that adds or removes a nick or address to a list. Always has a parameter.
|
|
# B = Mode that changes a setting and always has a parameter.
|
|
# C = Mode that changes a setting and only has a parameter when set.
|
|
# D = Mode that changes a setting and never has a parameter.
|
|
mchar = char[-1]
|
|
if mchar in possible_modes['*B'] + possible_modes['*C']:
|
|
# We need to look at the current mode list to reset modes that take arguments
|
|
# For example, trying to bounce +l 30 on a channel that had +l 50 set should
|
|
# give "+l 50" and not "-l".
|
|
oldarg = oldmodes_mapping.get(mchar)
|
|
|
|
if oldarg: # Old mode argument for this mode existed, use that.
|
|
mpair = ('+%s' % mchar, oldarg)
|
|
|
|
else: # Not found, flip the mode then.
|
|
|
|
# Mode takes no arguments when unsetting.
|
|
if mchar in possible_modes['*C'] and char[0] != '-':
|
|
arg = None
|
|
mpair = (self._flip(char), arg)
|
|
else:
|
|
mpair = (self._flip(char), arg)
|
|
|
|
if arg is not None:
|
|
arg = self.to_lower(arg)
|
|
if char[0] != '-' and (mchar, arg) in oldmodes:
|
|
# Mode is already set.
|
|
self._log_debug_modes("(%s) reverse_modes: skipping reversing '%s %s' with %s since we're "
|
|
"setting a mode that's already set.", self.name, char, arg, mpair)
|
|
continue
|
|
elif char[0] == '-' and (mchar, arg) not in oldmodes and mchar in possible_modes['*A']:
|
|
# We're unsetting a list or prefix mode that was never set - don't set it in response!
|
|
# TS6 IRCds lacks server-side verification for this and can cause annoying mode floods.
|
|
self._log_debug_modes("(%s) reverse_modes: skipping reversing '%s %s' with %s since it "
|
|
"wasn't previously set.", self.name, char, arg, mpair)
|
|
continue
|
|
elif char[0] == '-' and mchar not in oldmodes_mapping:
|
|
# Check the same for regular modes that previously didn't exist
|
|
self._log_debug_modes("(%s) reverse_modes: skipping reversing '%s %s' with %s since it "
|
|
"wasn't previously set.", self.name, char, arg, mpair)
|
|
continue
|
|
elif mpair in newmodes:
|
|
# Check the same for regular modes that previously didn't exist
|
|
self._log_debug_modes("(%s) reverse_modes: skipping duplicate reverse mode %s", self.name, mpair)
|
|
continue
|
|
newmodes.append(mpair)
|
|
|
|
self._log_debug_modes('(%s) reverse_modes: new modes: %s', self.name, newmodes)
|
|
if origstring:
|
|
# If the original query is a string, send it back as a string.
|
|
return self.join_modes(newmodes)
|
|
else:
|
|
return newmodes
|
|
|
|
@staticmethod
|
|
def join_modes(modes, sort=False):
|
|
"""
|
|
IRC specific: Takes a list of (mode, arg) tuples in parse_modes() format, and
|
|
joins them into a string.
|
|
"""
|
|
prefix = '+' # Assume we're adding modes unless told otherwise
|
|
modelist = ''
|
|
args = []
|
|
|
|
# Sort modes alphabetically like a conventional IRCd.
|
|
if sort:
|
|
modes = sorted(modes)
|
|
|
|
for modepair in modes:
|
|
mode, arg = modepair
|
|
assert len(mode) in (1, 2), "Incorrect length of a mode (received %r)" % mode
|
|
try:
|
|
# If the mode has a prefix, use that.
|
|
curr_prefix, mode = mode
|
|
except ValueError:
|
|
# If not, the current prefix stays the same as the last mode pair; move on
|
|
# to the next one.
|
|
pass
|
|
else:
|
|
# Only when the prefix of this mode isn't the same as the last one do we add
|
|
# the prefix to the mode string. This prevents '+nt-lk' from turning
|
|
# into '+n+t-l-k' or '+ntlk'.
|
|
if prefix != curr_prefix:
|
|
modelist += curr_prefix
|
|
prefix = curr_prefix
|
|
modelist += mode
|
|
if arg is not None:
|
|
args.append(arg)
|
|
if not modelist.startswith(('+', '-')):
|
|
# Our starting mode didn't have a prefix with it. Assume '+'.
|
|
modelist = '+' + modelist
|
|
if args:
|
|
# Add the args if there are any.
|
|
modelist += ' '
|
|
modelist += ' '.join((str(arg) for arg in args))
|
|
return modelist
|
|
|
|
@classmethod
|
|
def wrap_modes(cls, modes, limit, max_modes_per_msg=0):
|
|
"""
|
|
IRC specific: Takes a list of modes and wraps it across multiple lines.
|
|
"""
|
|
strings = []
|
|
|
|
# This process is slightly trickier than just wrapping arguments, because modes create
|
|
# positional arguments that can't be separated from its character.
|
|
queued_modes = []
|
|
total_length = 0
|
|
|
|
last_prefix = '+'
|
|
orig_modes = modes.copy()
|
|
modes = list(modes)
|
|
while modes:
|
|
# PyLink mode lists come in the form [('+t', None), ('-b', '*!*@someone'), ('+l', 3)]
|
|
# The +/- part is optional and is treated as the prefix of the last mode if not given,
|
|
# or + (adding modes) if it is the first mode in the list.
|
|
next_mode = modes.pop(0)
|
|
|
|
modechar, arg = next_mode
|
|
prefix = modechar[0]
|
|
if prefix not in '+-':
|
|
prefix = last_prefix
|
|
# Explicitly add the prefix to the mode character to prevent
|
|
# ambiguity when passing it to e.g. join_modes().
|
|
modechar = prefix + modechar
|
|
# XXX: because tuples are immutable, we have to replace the entire modepair...
|
|
next_mode = (modechar, arg)
|
|
|
|
# Figure out the length that the next mode will add to the buffer. If we're changing
|
|
# from + to - (setting to removing modes) or vice versa, we'll need two characters:
|
|
# the "+" or "-" as well as the actual mode char.
|
|
next_length = 1
|
|
if prefix != last_prefix:
|
|
next_length += 1
|
|
|
|
# Replace the last mode prefix with the current one for the next iteration.
|
|
last_prefix = prefix
|
|
|
|
if arg:
|
|
# This mode has an argument, so add the length of that and a space.
|
|
next_length += 1
|
|
next_length += len(arg)
|
|
|
|
assert next_length <= limit, \
|
|
"wrap_modes: Mode %s is too long for the given length %s" % (next_mode, limit)
|
|
|
|
# Check both message length and max. modes per msg if enabled.
|
|
if (next_length + total_length) <= limit and ((not max_modes_per_msg) or len(queued_modes) < max_modes_per_msg):
|
|
# We can fit this mode in the next message; add it.
|
|
total_length += next_length
|
|
cls._log_debug_modes('wrap_modes: Adding mode %s to queued modes', str(next_mode))
|
|
queued_modes.append(next_mode)
|
|
cls._log_debug_modes('wrap_modes: queued modes: %s', queued_modes)
|
|
else:
|
|
# Otherwise, create a new message by joining the previous queued modes into a message.
|
|
# Then, create a new message with our current mode.
|
|
strings.append(cls.join_modes(queued_modes))
|
|
queued_modes.clear()
|
|
|
|
cls._log_debug_modes('wrap_modes: cleared queue (length %s) and now adding %s', limit, str(next_mode))
|
|
queued_modes.append(next_mode)
|
|
total_length = next_length
|
|
else:
|
|
# Everything fit in one line, so just use that.
|
|
strings.append(cls.join_modes(queued_modes))
|
|
|
|
cls._log_debug_modes('wrap_modes: returning %s for %s', strings, orig_modes)
|
|
return strings
|
|
|
|
def get_hostmask(self, user, realhost=False, ip=False):
|
|
"""
|
|
Returns a representative hostmask / user friendly identifier for a user.
|
|
On IRC, this is nick!user@host; other platforms may choose to define a different
|
|
style for user hostmasks.
|
|
|
|
If the realhost option is given, prefer showing the real host of the user instead
|
|
of the displayed host.
|
|
If the ip option is given, prefering showing the IP address of the user (this overrides
|
|
realhost)."""
|
|
userobj = self.users.get(user)
|
|
|
|
try:
|
|
nick = userobj.nick
|
|
except AttributeError:
|
|
nick = '<unknown-nick>'
|
|
|
|
try:
|
|
ident = userobj.ident
|
|
except AttributeError:
|
|
ident = '<unknown-ident>'
|
|
|
|
try:
|
|
if ip:
|
|
host = userobj.ip
|
|
elif realhost:
|
|
host = userobj.realhost
|
|
else:
|
|
host = userobj.host
|
|
except AttributeError:
|
|
host = '<unknown-host>'
|
|
|
|
return '%s!%s@%s' % (nick, ident, host)
|
|
|
|
def get_friendly_name(self, entityid):
|
|
"""
|
|
Returns the display name of an entity:
|
|
|
|
For servers, this returns the server name given a SID.
|
|
For users, this returns a nick given the UID.
|
|
For channels, return the channel name (returned as-is for IRC).
|
|
"""
|
|
if entityid in self.servers:
|
|
return self.servers[entityid].name
|
|
elif entityid in self.users:
|
|
return self.users[entityid].nick
|
|
# Return channels as-is. Remember to strip any STATUSMSG prefixes like from @#channel
|
|
elif self.is_channel(entityid.lstrip(''.join(self.prefixmodes.values()))):
|
|
return entityid
|
|
else:
|
|
raise KeyError("Unknown UID/SID %s" % entityid)
|
|
|
|
def is_privileged_service(self, entityid):
|
|
"""
|
|
Returns whether the given UID and SID belongs to a privileged service.
|
|
|
|
For IRC, this reads the 'ulines' option in the server configuration. Other platforms
|
|
may override this to suit their needs.
|
|
"""
|
|
ulines = self.serverdata.get('ulines', [])
|
|
|
|
if entityid in self.users:
|
|
sid = self.get_server(entityid)
|
|
else:
|
|
sid = entityid
|
|
|
|
return self.get_friendly_name(sid) in ulines
|
|
|
|
def is_oper(self, uid, **kwargs):
|
|
"""
|
|
Returns whether the given user has operator / server administration status.
|
|
For IRC, this checks usermode +o. Other platforms may choose to define this another way.
|
|
|
|
The allowAuthed and allowOper keyword arguments are deprecated since PyLink 2.0-alpha4.
|
|
"""
|
|
if 'allowAuthed' in kwargs or 'allowOper' in kwargs:
|
|
log.warning('(%s) is_oper: the "allowAuthed" and "allowOper" options are deprecated as '
|
|
'of PyLink 2.0-alpha4 and now imply False and True respectively. To check for'
|
|
'PyLink account status, instead check the User.account attribute directly.',
|
|
self.name)
|
|
|
|
if uid in self.users and ("o", None) in self.users[uid].modes:
|
|
return True
|
|
return False
|
|
|
|
def match_host(self, glob, target, ip=True, realhost=True):
|
|
"""
|
|
Checks whether the given host or given UID's hostmask matches the given glob
|
|
(nick!user@host for IRC). PyLink extended targets are also supported.
|
|
|
|
If the target given is a UID, and the 'ip' or 'realhost' options are True, this will also
|
|
match against the target's IP address and real host, respectively.
|
|
|
|
This function respects IRC casemappings (rfc1459 and ascii). If the given target is a UID,
|
|
and the 'ip' option is enabled, the host portion of the glob is also matched as a CIDR range.
|
|
"""
|
|
# Allow queries like !$exttarget to invert the given match.
|
|
invert = glob.startswith('!')
|
|
if invert:
|
|
glob = glob.lstrip('!')
|
|
|
|
def match_host_core():
|
|
"""
|
|
Core processor for match_host(), minus the inversion check.
|
|
"""
|
|
# Work with variables in the match_host() scope, from
|
|
# http://stackoverflow.com/a/8178808
|
|
nonlocal glob
|
|
|
|
# Prepare a list of hosts to check against.
|
|
if target in self.users:
|
|
|
|
if not self.is_hostmask(glob):
|
|
for specialchar in '$:()':
|
|
# XXX: we should probably add proper rules on what's a valid account name
|
|
if specialchar in glob:
|
|
break
|
|
else:
|
|
# Implicitly convert matches for *sane* account names to "$pylinkacc:accountname".
|
|
log.debug('(%s) Using target $pylinkacc:%s instead of raw string %r', self.name, glob, glob)
|
|
glob = '$pylinkacc:' + glob
|
|
|
|
if glob.startswith('$'):
|
|
# Exttargets start with $. Skip regular ban matching and find the matching ban handler.
|
|
glob = glob.lstrip('$')
|
|
exttargetname = glob.split(':', 1)[0]
|
|
handler = world.exttarget_handlers.get(exttargetname)
|
|
|
|
if handler:
|
|
# Handler exists. Return what it finds.
|
|
result = handler(self, glob, target)
|
|
log.debug('(%s) Got %s from exttarget %s in match_host() glob $%s for target %s',
|
|
self.name, result, exttargetname, glob, target)
|
|
return result
|
|
else:
|
|
log.debug('(%s) Unknown exttarget %s in match_host() glob $%s', self.name,
|
|
exttargetname, glob)
|
|
return False
|
|
|
|
hosts = {self.get_hostmask(target)}
|
|
|
|
if ip:
|
|
hosts.add(self.get_hostmask(target, ip=True))
|
|
|
|
# HACK: support CIDR hosts in the hosts portion
|
|
try:
|
|
header, cidrtarget = glob.split('@', 1)
|
|
# Try to parse the host portion as a CIDR range
|
|
network = ipaddress.ip_network(cidrtarget)
|
|
|
|
real_ip = self.users[target].ip
|
|
if ipaddress.ip_address(real_ip) in network:
|
|
# If the CIDR matches, hack around the host matcher by pretending that
|
|
# the lookup target was the IP and not the CIDR range!
|
|
glob = '@'.join((header, real_ip))
|
|
log.debug('(%s) Found matching CIDR %s for %s, replacing target glob with IP %s', self.name,
|
|
cidrtarget, target, real_ip)
|
|
except ValueError:
|
|
pass
|
|
|
|
if realhost:
|
|
hosts.add(self.get_hostmask(target, realhost=True))
|
|
|
|
else: # We were given a host, use that.
|
|
hosts = [target]
|
|
|
|
# Iterate over the hosts to match, since we may have multiple (check IP/real host)
|
|
for host in hosts:
|
|
if self.match_text(glob, host):
|
|
return True
|
|
|
|
return False
|
|
|
|
result = match_host_core()
|
|
if invert:
|
|
result = not result
|
|
return result
|
|
|
|
def match_text(self, glob, text):
|
|
"""
|
|
Returns whether the given glob matches the given text under the network's current case mapping.
|
|
"""
|
|
return utils.match_text(glob, text, filterfunc=self.to_lower)
|
|
|
|
def match_all(self, banmask, channel=None):
|
|
"""
|
|
Returns all users matching the target hostmask/exttarget. Users can also be filtered by channel.
|
|
"""
|
|
if channel:
|
|
banmask = "$and:(%s+$channel:%s)" % (banmask, channel)
|
|
|
|
for uid, userobj in self.users.copy().items():
|
|
if self.match_host(banmask, uid) and uid in self.users:
|
|
yield uid
|
|
|
|
def match_all_re(self, re_mask, channel=None):
|
|
"""
|
|
Returns all users whose "nick!user@host [gecos]" mask matches the given regular expression. Users can also be filtered by channel.
|
|
"""
|
|
regexp = re.compile(re_mask)
|
|
for uid, userobj in self.users.copy().items():
|
|
target = '%s [%s]' % (self.get_hostmask(uid), userobj.realname)
|
|
if regexp.fullmatch(target) and ((not channel) or channel in userobj.channels):
|
|
yield uid
|
|
|
|
def make_channel_ban(self, uid, ban_type='ban', ban_style=None):
|
|
"""Creates a hostmask-based ban for the given user.
|
|
|
|
Ban exceptions, invite exceptions quiets, and extbans are also supported by setting ban_type
|
|
to the appropriate PyLink named mode (e.g. "ban", "banexception", "invex", "quiet", "ban_nonick")."""
|
|
assert uid in self.users, "Unknown user %s" % uid
|
|
|
|
# FIXME: verify that this is a valid mask.
|
|
# XXX: support slicing hosts so things like *!ident@*.isp.net are possible. This is actually
|
|
# more annoying to do than it appears because of vHosts using /, IPv6 addresses
|
|
# (cloaked and uncloaked), etc.
|
|
# TODO: make this not specific to IRC
|
|
ban_style = ban_style or self.serverdata.get('ban_style') or \
|
|
conf.conf['pylink'].get('ban_style') or '*!*@$host'
|
|
|
|
template = string.Template(ban_style)
|
|
banhost = template.safe_substitute(self.users[uid].get_fields())
|
|
if not self.is_hostmask(banhost):
|
|
raise ValueError("Ban mask %r is not a valid hostmask!" % banhost)
|
|
|
|
if ban_type in self.cmodes:
|
|
return ('+%s' % self.cmodes[ban_type], banhost)
|
|
elif ban_type in self.extbans_acting: # Handle extbans, which are generally "+b prefix:banmask"
|
|
return ('+%s' % self.cmodes['ban'], self.extbans_acting[ban_type]+banhost)
|
|
else:
|
|
raise ValueError("ban_type %r is not available on IRCd %r" % (ban_type, self.protoname))
|
|
|
|
def updateTS(self, sender, channel, their_ts, modes=None):
|
|
"""
|
|
IRC specific: Merges modes of a channel given the remote TS and a list of modes.
|
|
"""
|
|
|
|
# Okay, so the situation is that we have 6 possible TS/sender combinations:
|
|
|
|
# | our TS lower | TS equal | their TS lower
|
|
# mode origin is us | OVERWRITE | MERGE | IGNORE
|
|
# mode origin is uplink | IGNORE | MERGE | OVERWRITE
|
|
|
|
if modes is None:
|
|
modes = []
|
|
|
|
def _clear():
|
|
log.debug("(%s) Clearing local modes from channel %s due to TS change", self.name,
|
|
channel)
|
|
self._channels[channel].modes.clear()
|
|
for p in self._channels[channel].prefixmodes.values():
|
|
for user in p.copy():
|
|
if not self.is_internal_client(user):
|
|
p.discard(user)
|
|
|
|
def _apply():
|
|
if modes:
|
|
log.debug("(%s) Applying modes on channel %s (TS ok)", self.name,
|
|
channel)
|
|
self.apply_modes(channel, modes)
|
|
|
|
# Use a lock so only one thread can change a channel's TS at once: this prevents race
|
|
# conditions that would otherwise desync channel modes.
|
|
with self._ts_lock:
|
|
our_ts = self._channels[channel].ts
|
|
assert isinstance(our_ts, int), "Wrong type for our_ts (expected int, got %s)" % type(our_ts)
|
|
assert isinstance(their_ts, int), "Wrong type for their_ts (expected int, got %s)" % type(their_ts)
|
|
|
|
# Check if we're the mode sender based on the UID / SID given.
|
|
our_mode = self.is_internal_client(sender) or self.is_internal_server(sender)
|
|
|
|
log.debug("(%s/%s) our_ts: %s; their_ts: %s; is the mode origin us? %s", self.name,
|
|
channel, our_ts, their_ts, our_mode)
|
|
|
|
if their_ts == our_ts:
|
|
log.debug("(%s/%s) remote TS of %s is equal to our %s; mode query %s",
|
|
self.name, channel, their_ts, our_ts, modes)
|
|
# Their TS is equal to ours. Merge modes.
|
|
_apply()
|
|
|
|
elif (their_ts < our_ts):
|
|
if their_ts < 750000:
|
|
if their_ts != 0: # Sometimes unreal sends SJOIN with 0, don't warn for those
|
|
if self.serverdata.get('ignore_ts_errors'):
|
|
log.debug('(%s) Silently ignoring bogus TS %s on channel %s', self.name, their_ts, channel)
|
|
else:
|
|
log.warning('(%s) Possible desync? Not setting bogus TS %s on channel %s', self.name, their_ts, channel)
|
|
else:
|
|
log.debug('(%s) Resetting channel TS of %s from %s to %s (remote has lower TS)',
|
|
self.name, channel, our_ts, their_ts)
|
|
self._channels[channel].ts = their_ts
|
|
|
|
# Remote TS was lower and we're receiving modes. Clear the modelist and apply theirs.
|
|
|
|
_clear()
|
|
_apply()
|
|
|
|
def _check_nick_collision(self, nick):
|
|
"""
|
|
IRC specific: Nick collision preprocessor for user introductions.
|
|
|
|
If the given nick matches an existing UID, send out a SAVE hook payload indicating a nick collision.
|
|
"""
|
|
uid = self.nick_to_uid(nick)
|
|
# If there is a nick collision, we simply alert plugins. Relay will purposely try to
|
|
# lose fights and tag nicks instead, while other plugins can choose how to handle this.
|
|
if uid:
|
|
log.info('(%s) Nick collision on %s/%s, forwarding this to plugins', self.name,
|
|
uid, nick)
|
|
self.call_hooks([self.sid, 'SAVE', {'target': uid}])
|
|
|
|
def _expandPUID(self, entityid):
|
|
"""
|
|
Returns the nick or server name for the given UID/SID. This method helps support protocol
|
|
modules that use PUIDs internally, as they must convert them to talk with the uplink.
|
|
"""
|
|
# TODO: stop hardcoding @ as separator
|
|
if isinstance(entityid, str) and '@' in entityid:
|
|
name = self.get_friendly_name(entityid)
|
|
log.debug('(%s) _expandPUID: mangling pseudo ID %s to %s', self.name, entityid, name)
|
|
return name
|
|
return entityid # Regular UID/SID, no change
|
|
|
|
def wrap_message(self, source, target, text):
|
|
"""
|
|
Wraps the given message text into multiple lines (length depends on how much the protocol
|
|
allows), and returns these as a list.
|
|
"""
|
|
# This is protocol specific, so stub it here in the base class.
|
|
raise NotImplementedError
|
|
|
|
# When this many pings in a row are missed, the ping timer loop will force a disconnect on the
|
|
# next cycle. Effectively the ping timeout is: pingfreq * (KEEPALIVE_MAX_MISSED + 1)
|
|
KEEPALIVE_MAX_MISSED = 2
|
|
|
|
class IRCNetwork(PyLinkNetworkCoreWithUtils):
|
|
S2S_BUFSIZE = 510
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
|
|
self._queue = None
|
|
self._ping_timer = None
|
|
self._socket = None
|
|
self._buffer = bytearray()
|
|
self._reconnect_thread = None
|
|
self._queue_thread = None
|
|
|
|
def _init_vars(self, *args, **kwargs):
|
|
super()._init_vars(*args, **kwargs)
|
|
|
|
# Set IRC specific variables for ping checking and queuing
|
|
self.lastping = time.time() # This actually tracks the last message received as of 2.0-alpha4
|
|
self.pingfreq = self.serverdata.get('pingfreq') or 90
|
|
|
|
self.maxsendq = self.serverdata.get('maxsendq', 4096)
|
|
self._queue = queue.Queue(self.maxsendq)
|
|
|
|
def _schedule_ping(self):
|
|
"""Schedules periodic pings in a loop."""
|
|
self._ping_uplink()
|
|
|
|
if self._aborted.is_set():
|
|
return
|
|
|
|
elapsed = time.time() - self.lastping
|
|
if elapsed > (self.pingfreq * KEEPALIVE_MAX_MISSED):
|
|
log.error('(%s) Disconnected from IRC: Ping timeout (%d secs)', self.name, elapsed)
|
|
self.disconnect()
|
|
return
|
|
|
|
self._ping_timer = threading.Timer(self.pingfreq, self._schedule_ping)
|
|
self._ping_timer.daemon = True
|
|
self._ping_timer.name = 'Ping timer loop for %s' % self.name
|
|
self._ping_timer.start()
|
|
|
|
log.debug('(%s) Ping scheduled at %s', self.name, time.time())
|
|
|
|
def _log_connection_error(self, *args, **kwargs):
|
|
# Log connection errors to ERROR unless were shutting down (in which case,
|
|
# the given text goes to DEBUG).
|
|
if self._aborted.is_set() or world.shutting_down.is_set():
|
|
log.debug(*args, **kwargs)
|
|
else:
|
|
log.error(*args, **kwargs)
|
|
|
|
def _make_ssl_context(self):
|
|
"""
|
|
Returns a ssl.SSLContext instance appropriate for this connection.
|
|
"""
|
|
context = ssl.create_default_context()
|
|
|
|
# Use the ssl-should-verify protocol capability to determine whether we should
|
|
# accept invalid certs by default. Generally, cert validation is OFF for server protocols
|
|
# and ON for client-based protocols like clientbot
|
|
if self.serverdata.get('ssl_accept_invalid_certs', not self.has_cap("ssl-should-verify")):
|
|
# Note: check_hostname has to be off to set verify_mode to CERT_NONE,
|
|
# since it's possible for the remote link to not provide a cert at all
|
|
context.check_hostname = False
|
|
context.verify_mode = ssl.CERT_NONE
|
|
else:
|
|
# Otherwise, only check cert hostname if the target is a hostname OR we have
|
|
# ssl-should-verify defined
|
|
context.check_hostname = self.serverdata.get('ssl_validate_hostname',
|
|
self.has_cap("ssl-should-verify") or
|
|
utils.get_hostname_type(self.serverdata['ip']) == 0)
|
|
|
|
return context
|
|
|
|
def _setup_ssl(self):
|
|
"""
|
|
Initializes SSL/TLS for this network.
|
|
"""
|
|
log.info('(%s) Using TLS/SSL for this connection...', self.name)
|
|
cafile = self.serverdata.get('ssl_cafile')
|
|
certfile = self.serverdata.get('ssl_certfile')
|
|
keyfile = self.serverdata.get('ssl_keyfile')
|
|
|
|
context = self._make_ssl_context()
|
|
|
|
# Cert and key files are optional, load them if specified.
|
|
if certfile and keyfile:
|
|
try:
|
|
cafile != None and context.load_verify_locations(cafile)
|
|
context.load_cert_chain(certfile, keyfile)
|
|
except OSError:
|
|
log.exception('(%s) Caught OSError trying to initialize the SSL connection; '
|
|
'are "ssl_certfile", "ssl_keyfile", and "ssl_cafile" set correctly?',
|
|
self.name)
|
|
raise
|
|
|
|
self._socket = context.wrap_socket(self._socket, server_hostname=self.serverdata.get('ip'))
|
|
|
|
def _verify_ssl(self):
|
|
"""
|
|
Implements additional SSL/TLS verifications (so far, only certificate fingerprints when enabled).
|
|
"""
|
|
peercert = self._socket.getpeercert(binary_form=True)
|
|
|
|
# Hash type is configurable using the ssl_fingerprint_type
|
|
# value, and defaults to sha256.
|
|
hashtype = self.serverdata.get('ssl_fingerprint_type', 'sha256').lower()
|
|
|
|
try:
|
|
hashfunc = getattr(hashlib, hashtype)
|
|
except AttributeError:
|
|
raise conf.ConfigurationError('Unsupported or invalid TLS/SSL certificate fingerprint type %r',
|
|
hashtype)
|
|
else:
|
|
expected_fp = self.serverdata.get('ssl_fingerprint')
|
|
if expected_fp and peercert is None:
|
|
raise ssl.CertificateError('TLS/SSL certificate fingerprint checking is enabled but the uplink '
|
|
'did not provide a certificate')
|
|
|
|
fp = hashfunc(peercert).hexdigest()
|
|
|
|
if expected_fp:
|
|
if fp != expected_fp:
|
|
# SSL Fingerprint doesn't match; break.
|
|
raise ssl.CertificateError('Uplink TLS/SSL certificate fingerprint (%s: %r) does not '
|
|
'match the one configured (%s: %r)' % (hashtype, fp, hashtype, expected_fp))
|
|
else:
|
|
log.info('(%s) Uplink TLS/SSL certificate fingerprint '
|
|
'verified (%s: %r)', self.name, hashtype, fp)
|
|
elif hasattr(self._socket, 'context') and self._socket.context.verify_mode == ssl.CERT_NONE:
|
|
log.info('(%s) Uplink\'s TLS/SSL certificate fingerprint (%s) '
|
|
'is %r. You can enhance the security of your '
|
|
'link by specifying this in a "ssl_fingerprint"'
|
|
' option in your server block.', self.name,
|
|
hashtype, fp)
|
|
|
|
def _connect(self):
|
|
"""
|
|
Connects to the network.
|
|
"""
|
|
self._pre_connect()
|
|
|
|
remote = self.serverdata["ip"]
|
|
port = self.serverdata["port"]
|
|
try:
|
|
if 'bindhost' in self.serverdata:
|
|
# Try detecting the socket type from the bindhost if specified.
|
|
force_ipv6 = utils.get_hostname_type(self.serverdata['bindhost']) == 2
|
|
else:
|
|
force_ipv6 = self.serverdata.get("ipv6") # ternary value (None = use system default)
|
|
|
|
if force_ipv6 is True:
|
|
dns_stype = socket.AF_INET6
|
|
elif force_ipv6 is False:
|
|
dns_stype = socket.AF_INET
|
|
else:
|
|
dns_stype = socket.AF_UNSPEC
|
|
|
|
dns_result = socket.getaddrinfo(remote, port, family=dns_stype)[0]
|
|
ip = dns_result[-1][0]
|
|
|
|
log.debug('(%s) Resolving address %s to %s (force_ipv6=%s)', self.name, remote, ip, force_ipv6)
|
|
|
|
# Create the actual socket.
|
|
self._socket = socket.socket(dns_result[0])
|
|
|
|
# Set the socket bind if applicable.
|
|
if 'bindhost' in self.serverdata:
|
|
self._socket.bind((self.serverdata['bindhost'], 0))
|
|
|
|
# Enable SSL if set to do so.
|
|
self.ssl = self.serverdata.get('ssl')
|
|
if self.ssl:
|
|
self._setup_ssl()
|
|
elif not ipaddress.ip_address(ip).is_loopback:
|
|
log.warning('(%s) This connection will be made via plain text, which is vulnerable '
|
|
'to man-in-the-middle (MITM) attacks and passive eavesdropping. Consider '
|
|
'enabling TLS/SSL with either certificate validation or fingerprint '
|
|
'pinning to better secure your network traffic.', self.name)
|
|
|
|
log.info("Connecting to network %r on %s:%s", self.name, ip, port)
|
|
|
|
self._socket.settimeout(self.pingfreq)
|
|
|
|
# Start the actual connection
|
|
self._socket.connect((ip, port))
|
|
|
|
if self not in world.networkobjects.values():
|
|
log.debug("(%s) _connect: disconnecting socket %s as the network was removed",
|
|
self.name, self._socket)
|
|
try:
|
|
self._socket.shutdown(socket.SHUT_RDWR)
|
|
finally:
|
|
self._socket.close()
|
|
return
|
|
|
|
# Make sure future reads never block, since select doesn't always guarantee this.
|
|
self._socket.setblocking(False)
|
|
|
|
selectdriver.register(self)
|
|
|
|
if self.ssl:
|
|
self._verify_ssl()
|
|
|
|
self._queue_thread = threading.Thread(name="Queue thread for %s" % self.name,
|
|
target=self._process_queue, daemon=True)
|
|
self._queue_thread.start()
|
|
|
|
self.sid = self.serverdata.get("sid")
|
|
# All our checks passed, get the protocol module to connect and run the listen
|
|
# loop. This also updates any SID values should the protocol module do so.
|
|
self.post_connect()
|
|
|
|
log.info('(%s) Enumerating our own SID %s', self.name, self.sid)
|
|
host = self.hostname()
|
|
|
|
self.servers[self.sid] = Server(self, None, host, internal=True,
|
|
desc=self.serverdata.get('serverdesc')
|
|
or conf.conf['pylink']['serverdesc'])
|
|
|
|
log.info('(%s) Starting ping schedulers....', self.name)
|
|
self._schedule_ping()
|
|
log.info('(%s) Server ready; listening for data.', self.name)
|
|
self.autoconnect_active_multiplier = 1 # Reset any extra autoconnect delays
|
|
|
|
# _run_irc() or the protocol module it called raised an exception, meaning we've disconnected
|
|
except:
|
|
self._log_connection_error('(%s) Disconnected from IRC:', self.name, exc_info=True)
|
|
if not self._aborted.is_set():
|
|
self.disconnect()
|
|
|
|
def connect(self):
|
|
"""
|
|
Starts a thread to connect the network.
|
|
"""
|
|
connect_thread = threading.Thread(target=self._connect, daemon=True,
|
|
name="Connect thread for %s" %
|
|
self.name)
|
|
connect_thread.start()
|
|
|
|
def disconnect(self):
|
|
"""Handle disconnects from the remote server."""
|
|
if self._aborted.is_set():
|
|
return
|
|
|
|
self._pre_disconnect()
|
|
|
|
# Stop the queue thread.
|
|
if self._queue is not None:
|
|
try:
|
|
# XXX: queue.Queue.queue isn't actually documented, so this is probably not reliable in the long run.
|
|
with self._queue.mutex:
|
|
self._queue.queue[0] = None
|
|
except IndexError:
|
|
self._queue.put(None)
|
|
|
|
if self._socket is not None:
|
|
try:
|
|
selectdriver.unregister(self)
|
|
except KeyError:
|
|
pass
|
|
try:
|
|
log.debug('(%s) disconnect: shutting down read half of socket %s', self.name, self._socket)
|
|
self._socket.shutdown(socket.SHUT_RD)
|
|
except:
|
|
log.debug('(%s) Error on socket shutdown:', self.name, exc_info=True)
|
|
|
|
log.debug('(%s) disconnect: waiting for write half of socket %s to shutdown', self.name, self._socket)
|
|
# Wait for the write half to shut down when applicable.
|
|
if self._queue_thread is None or self._aborted_send.wait(10):
|
|
log.debug('(%s) disconnect: closing socket %s', self.name, self._socket)
|
|
self._socket.close()
|
|
|
|
# Stop the ping timer.
|
|
if self._ping_timer:
|
|
log.debug('(%s) Canceling pingTimer at %s due to disconnect() call', self.name, time.time())
|
|
self._ping_timer.cancel()
|
|
self._buffer.clear()
|
|
self._post_disconnect()
|
|
|
|
# Clear old sockets.
|
|
self._socket = None
|
|
|
|
self._start_reconnect()
|
|
|
|
def _start_reconnect(self):
|
|
"""Schedules a reconnection to the network."""
|
|
def _reconnect():
|
|
# _run_autoconnect() will block and return True after the autoconnect
|
|
# delay has passed, if autoconnect is disabled. We do not want it to
|
|
# block whatever is calling disconnect() though, so we run it in a new
|
|
# thread.
|
|
if self._run_autoconnect():
|
|
self.connect()
|
|
|
|
if self not in world.networkobjects.values():
|
|
log.debug('(%s) _start_reconnect: Stopping reconnect timer as the network was removed', self.name)
|
|
return
|
|
elif self._reconnect_thread is None or not self._reconnect_thread.is_alive():
|
|
self._reconnect_thread = threading.Thread(target=_reconnect, name="Reconnecting network %s" % self.name)
|
|
self._reconnect_thread.start()
|
|
else:
|
|
log.debug('(%s) Ignoring attempt to reschedule reconnect as one is in progress.', self.name)
|
|
|
|
def handle_events(self, line):
|
|
raise NotImplementedError
|
|
|
|
def parse_irc_command(self, line):
|
|
"""Sends a command to the protocol module."""
|
|
log.debug("(%s) <- %s", self.name, line)
|
|
if not line:
|
|
log.warning("(%s) Got empty line %r from IRC?", self.name, line)
|
|
return
|
|
|
|
try:
|
|
hook_args = self.handle_events(line)
|
|
except Exception:
|
|
log.exception('(%s) Caught error in handle_events, disconnecting!', self.name)
|
|
log.error('(%s) The offending line was: <- %s', self.name, line)
|
|
self.disconnect()
|
|
return
|
|
# Only call our hooks if there's data to process. Handlers that support
|
|
# hooks will return a dict of parsed arguments, which can be passed on
|
|
# to plugins and the like. For example, the JOIN handler will return
|
|
# something like: {'channel': '#whatever', 'users': ['UID1', 'UID2',
|
|
# 'UID3']}, etc.
|
|
if hook_args is not None:
|
|
self.call_hooks(hook_args)
|
|
|
|
return hook_args
|
|
|
|
def _run_irc(self):
|
|
"""
|
|
Message handler, called when select() has data to read.
|
|
"""
|
|
if self._socket is None:
|
|
log.debug('(%s) Ignoring attempt to read data because self._socket is None', self.name)
|
|
return
|
|
|
|
data = bytearray()
|
|
try:
|
|
data = self._socket.recv(2048)
|
|
except (BlockingIOError, ssl.SSLWantReadError, ssl.SSLWantWriteError):
|
|
log.debug('(%s) No data to read, trying again later...', self.name, exc_info=True)
|
|
return
|
|
except OSError:
|
|
# Suppress socket read warnings from lingering recv() calls if
|
|
# we've been told to shutdown.
|
|
if self._aborted.is_set():
|
|
return
|
|
raise
|
|
|
|
self._buffer += data
|
|
if not data:
|
|
self._log_connection_error('(%s) Connection lost, disconnecting.', self.name)
|
|
self.disconnect()
|
|
return
|
|
|
|
while b'\n' in self._buffer:
|
|
line, self._buffer = self._buffer.split(b'\n', 1)
|
|
line = line.strip(b'\r')
|
|
line = line.decode(self.encoding, "replace")
|
|
self.parse_irc_command(line)
|
|
|
|
# Update the last message received time
|
|
self.lastping = time.time()
|
|
|
|
def _send(self, data):
|
|
"""Sends raw text to the uplink server."""
|
|
if self._aborted.is_set() or self._socket is None:
|
|
log.debug("(%s) Not sending message %r since the connection is dead", self.name, data)
|
|
return
|
|
|
|
# Safeguard against newlines in input!! Otherwise, each line gets
|
|
# treated as a separate command, which is particularly nasty.
|
|
data = data.replace('\n', ' ')
|
|
encoded_data = data.encode(self.encoding, 'replace')
|
|
if self.S2S_BUFSIZE > 0: # Apply message cutoff as needed
|
|
encoded_data = encoded_data[:self.S2S_BUFSIZE]
|
|
encoded_data += b"\r\n"
|
|
|
|
log.debug("(%s) -> %s", self.name, data)
|
|
|
|
while True:
|
|
try:
|
|
self._socket.send(encoded_data)
|
|
except (BlockingIOError, ssl.SSLWantReadError, ssl.SSLWantWriteError):
|
|
# The send attempt failed, wait a little bit.
|
|
# I would prefer using a blocking socket and MSG_DONTWAIT in recv()'s flags
|
|
# but SSLSocket doesn't support that...
|
|
throttle_time = self.serverdata.get('throttle_time', 0)
|
|
if self._aborted.wait(throttle_time):
|
|
break
|
|
continue
|
|
except:
|
|
log.exception("(%s) Failed to send message %r; aborting!", self.name, data)
|
|
self.disconnect()
|
|
return
|
|
else:
|
|
break
|
|
|
|
def send(self, data, queue=True):
|
|
"""send() wrapper with optional queueing support."""
|
|
if self._aborted.is_set():
|
|
log.debug('(%s) refusing to queue data %r as self._aborted is set', self.name, data)
|
|
return
|
|
if queue:
|
|
# XXX: we don't really know how to handle blocking queues yet, so
|
|
# it's better to not expose that yet.
|
|
try:
|
|
self._queue.put_nowait(data)
|
|
except QUEUE_FULL:
|
|
log.error('(%s) Max SENDQ exceeded (%s), disconnecting!', self.name, self._queue.maxsize)
|
|
self.disconnect()
|
|
raise
|
|
else:
|
|
self._send(data)
|
|
|
|
def _process_queue(self):
|
|
"""Loop to process outgoing queue data."""
|
|
while True:
|
|
throttle_time = self.serverdata.get('throttle_time', 0)
|
|
if not self._aborted.wait(throttle_time):
|
|
data = self._queue.get()
|
|
if data is None:
|
|
log.debug('(%s) Stopping queue thread due to getting None as item', self.name)
|
|
break
|
|
elif self not in world.networkobjects.values():
|
|
log.debug('(%s) Stopping stale queue thread; no longer matches world.networkobjects', self.name)
|
|
break
|
|
elif self._aborted.is_set():
|
|
# The _aborted flag may have changed while we were waiting for an item,
|
|
# so check for it again.
|
|
log.debug('(%s) Stopping queue thread since the connection is dead', self.name)
|
|
break
|
|
elif data:
|
|
self._send(data)
|
|
else:
|
|
break
|
|
|
|
# Once we're done here, shut down the write part of the socket.
|
|
if self._socket:
|
|
log.debug('(%s) _process_queue: shutting down write half of socket %s', self.name, self._socket)
|
|
self._socket.shutdown(socket.SHUT_WR)
|
|
self._aborted_send.set()
|
|
|
|
def wrap_message(self, source, target, text):
|
|
"""
|
|
Wraps the given message text into multiple lines, and returns these as a list.
|
|
|
|
For IRC, the maximum length of one message is calculated as S2S_BUFSIZE (default to 510)
|
|
minus the length of ":sender-nick!sender-user@sender-host PRIVMSG #target :"
|
|
"""
|
|
# We explicitly want wrapping (e.g. for messages eventually making its way to a user), so
|
|
# use the default bufsize of 510 even if the IRCd's S2S protocol allows infinitely long
|
|
# long messages.
|
|
bufsize = self.S2S_BUFSIZE or IRCNetwork.S2S_BUFSIZE
|
|
try:
|
|
target = self.get_friendly_name(target)
|
|
except KeyError:
|
|
log.warning('(%s) Possible desync? Error while expanding wrap_message target %r '
|
|
'(source=%s)', self.name, target, source, exc_info=True)
|
|
|
|
prefixstr = ":%s PRIVMSG %s :" % (self.get_hostmask(source), target)
|
|
maxlen = bufsize - len(prefixstr)
|
|
|
|
log.debug('(%s) wrap_message: length of prefix %r is %s, bufsize=%s, maxlen=%s',
|
|
self.name, prefixstr, len(prefixstr), bufsize, maxlen)
|
|
|
|
if maxlen <= 0:
|
|
log.error('(%s) Got invalid maxlen %s for wrap_message (%s -> %s)', self.name, maxlen,
|
|
source, target)
|
|
return [text]
|
|
|
|
return textwrap.wrap(text, width=maxlen)
|
|
|
|
Irc = IRCNetwork
|
|
|
|
class Server():
|
|
"""PyLink IRC server class.
|
|
|
|
irc: the protocol/network object this Server instance is attached to.
|
|
uplink: The SID of this Server instance's uplink. This is set to None
|
|
for **both** the main PyLink server and our uplink.
|
|
name: The name of the server.
|
|
internal: Boolean, whether the server is an internal PyLink server.
|
|
desc: Sets the server description if relevant.
|
|
"""
|
|
|
|
def __init__(self, irc, uplink, name, internal=False, desc="(None given)"):
|
|
self.uplink = uplink
|
|
self.users = set()
|
|
self.internal = internal
|
|
if isinstance(name, str):
|
|
self.name = name.lower()
|
|
else:
|
|
self.name = name
|
|
self.desc = desc
|
|
self._irc = irc
|
|
|
|
assert uplink is None or uplink in self._irc.servers, "Unknown uplink %s" % uplink
|
|
|
|
if uplink is None:
|
|
self.hopcount = 1
|
|
else:
|
|
self.hopcount = self._irc.servers[uplink].hopcount + 1
|
|
|
|
# Has the server finished bursting yet?
|
|
self.has_eob = False
|
|
|
|
def __repr__(self):
|
|
return 'Server(%s)' % self.name
|
|
|
|
IrcServer = Server
|
|
|
|
class Channel(TSObject, structures.CamelCaseToSnakeCase, structures.CopyWrapper):
|
|
"""PyLink IRC channel class."""
|
|
|
|
def __init__(self, irc, name=None):
|
|
super().__init__()
|
|
# Initialize variables, such as the topic, user list, TS, who's opped, etc.
|
|
self.users = set()
|
|
self.modes = set()
|
|
self.topic = ''
|
|
self.prefixmodes = {'op': set(), 'halfop': set(), 'voice': set(),
|
|
'owner': set(), 'admin': set()}
|
|
self._irc = irc
|
|
|
|
# Determines whether a topic has been set here or not. Protocol modules
|
|
# should set this.
|
|
self.topicset = False
|
|
|
|
# Saves the channel name (may be useful to plugins, etc.)
|
|
self.name = name
|
|
|
|
def __repr__(self):
|
|
return 'Channel(%s)' % self.name
|
|
|
|
def remove_user(self, target):
|
|
"""Removes a user from a channel."""
|
|
for s in self.prefixmodes.values():
|
|
s.discard(target)
|
|
self.users.discard(target)
|
|
removeuser = remove_user
|
|
|
|
def is_voice(self, uid):
|
|
"""Returns whether the given user is voice in the channel."""
|
|
return uid in self.prefixmodes['voice']
|
|
|
|
def is_halfop(self, uid):
|
|
"""Returns whether the given user is halfop in the channel."""
|
|
return uid in self.prefixmodes['halfop']
|
|
|
|
def is_op(self, uid):
|
|
"""Returns whether the given user is op in the channel."""
|
|
return uid in self.prefixmodes['op']
|
|
|
|
def is_admin(self, uid):
|
|
"""Returns whether the given user is admin (&) in the channel."""
|
|
return uid in self.prefixmodes['admin']
|
|
|
|
def is_owner(self, uid):
|
|
"""Returns whether the given user is owner (~) in the channel."""
|
|
return uid in self.prefixmodes['owner']
|
|
|
|
def is_voice_plus(self, uid):
|
|
"""Returns whether the given user is voice or above in the channel."""
|
|
# If the user has any prefix mode, it has to be voice or greater.
|
|
return bool(self.get_prefix_modes(uid))
|
|
|
|
def is_halfop_plus(self, uid):
|
|
"""Returns whether the given user is halfop or above in the channel."""
|
|
for mode in ('halfop', 'op', 'admin', 'owner'):
|
|
if uid in self.prefixmodes[mode]:
|
|
return True
|
|
return False
|
|
|
|
def is_op_plus(self, uid):
|
|
"""Returns whether the given user is op or above in the channel."""
|
|
for mode in ('op', 'admin', 'owner'):
|
|
if uid in self.prefixmodes[mode]:
|
|
return True
|
|
return False
|
|
|
|
@staticmethod
|
|
def sort_prefixes(key):
|
|
"""
|
|
Returns a numeric value for a named prefix mode: higher ranks have lower values
|
|
(sorted first), and lower ranks have higher values (sorted last).
|
|
|
|
This function essentially implements a sorted() key function for named prefix modes.
|
|
"""
|
|
values = {'owner': 0, 'admin': 100, 'op': 200, 'halfop': 300, 'voice': 500}
|
|
|
|
# Default to highest value (1000) for unknown modes, should they appear.
|
|
return values.get(key, 1000)
|
|
|
|
def get_prefix_modes(self, uid, prefixmodes=None):
|
|
"""
|
|
Returns a list of all named prefix modes the user has in the channel, in
|
|
decreasing order from owner to voice.
|
|
|
|
Optionally, a prefixmodes argument can be given to look at an earlier state of
|
|
the channel's prefix modes mapping, e.g. for checking the op status of a mode
|
|
setter before their modes are processed and added to the channel state.
|
|
"""
|
|
|
|
if uid not in self.users:
|
|
raise KeyError("User %s does not exist or is not in the channel" % uid)
|
|
|
|
result = []
|
|
prefixmodes = prefixmodes or self.prefixmodes
|
|
|
|
for mode, modelist in prefixmodes.items():
|
|
if uid in modelist:
|
|
result.append(mode)
|
|
|
|
return sorted(result, key=self.sort_prefixes)
|
|
IrcChannel = Channel
|
|
|
|
class PUIDGenerator():
|
|
"""
|
|
Pseudo UID Generator module, using a prefix and a simple counter.
|
|
"""
|
|
|
|
def __init__(self, prefix, start=0):
|
|
self.prefix = prefix
|
|
self.counter = start
|
|
|
|
def next_uid(self, prefix=''):
|
|
"""
|
|
Generates the next PUID.
|
|
"""
|
|
uid = '%s@%s' % (prefix or self.prefix, self.counter)
|
|
self.counter += 1
|
|
return uid
|
|
next_sid = next_uid
|