mirror of
https://github.com/jlu5/PyLink.git
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365 lines
13 KiB
Python
365 lines
13 KiB
Python
"""
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automode.py - Provide simple channel ACL management by giving prefix modes to users matching
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hostmasks or exttargets.
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"""
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import collections
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import threading
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import json
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from pylinkirc import utils, conf, world
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from pylinkirc.log import log
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from pylinkirc.coremods import permissions
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mydesc = ("The \x02Automode\x02 plugin provides simple channel ACL management by giving prefix modes "
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"to users matching hostmasks or exttargets.")
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# Register ourselves as a service.
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modebot = world.services.get("automode", utils.registerService("automode", desc=mydesc))
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reply = modebot.reply
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# Databasing variables.
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dbname = utils.getDatabaseName('automode')
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db = collections.defaultdict(dict)
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exportdb_timer = None
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save_delay = conf.conf['bot'].get('save_delay', 300)
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# The default set of Automode permissions.
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default_permissions = {"$ircop": ['automode.manage.relay_owned', 'automode.sync.relay_owned',
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'automode.list']}
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def loadDB():
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"""Loads the Automode database, silently creating a new one if this fails."""
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global db
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try:
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with open(dbname, "r") as f:
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db.update(json.load(f))
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except (ValueError, IOError, OSError):
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log.info("Automode: failed to load ACL database %s; creating a new one in "
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"memory.", dbname)
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def exportDB():
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"""Exports the automode database."""
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log.debug("Automode: exporting database to %s.", dbname)
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with open(dbname, 'w') as f:
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# Pretty print the JSON output for better readability.
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json.dump(db, f, indent=4)
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def scheduleExport(starting=False):
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"""
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Schedules exporting of the Automode database in a repeated loop.
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"""
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global exportdb_timer
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if not starting:
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# Export the database, unless this is being called the first
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# thing after start (i.e. DB has just been loaded).
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exportDB()
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exportdb_timer = threading.Timer(save_delay, scheduleExport)
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exportdb_timer.name = 'Automode exportDB Loop'
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exportdb_timer.start()
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def main(irc=None):
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"""Main function, called during plugin loading at start."""
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# Load the automode database.
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loadDB()
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# Schedule periodic exports of the automode database.
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scheduleExport(starting=True)
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# Register our permissions.
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permissions.addDefaultPermissions(default_permissions)
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# Queue joins to all channels where Automode has entries.
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for entry in db:
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netname, channel = entry.split('#', 1)
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channel = '#' + channel
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log.debug('automode: auto-joining %s on %s', channel, netname)
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modebot.extra_channels[netname].add(channel)
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# This explicitly forces a join to connected networks (on plugin load, etc.).
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mb_uid = modebot.uids.get(netname)
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if netname in world.networkobjects and mb_uid in world.networkobjects[netname].users:
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remoteirc = world.networkobjects[netname]
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remoteirc.proto.join(mb_uid, channel)
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# Call a join hook manually so other plugins like relay can understand it.
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remoteirc.callHooks([mb_uid, 'PYLINK_AUTOMODE_JOIN', {'channel': channel, 'users': [mb_uid],
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'modes': remoteirc.channels[channel].modes,
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'parse_as': 'JOIN'}])
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def die(sourceirc):
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"""Saves the Automode database and quit."""
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exportDB()
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# Kill the scheduling for exports.
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global exportdb_timer
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if exportdb_timer:
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log.debug("Automode: cancelling exportDB timer thread %s due to die()", threading.get_ident())
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exportdb_timer.cancel()
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permissions.removeDefaultPermissions(default_permissions)
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utils.unregisterService('automode')
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def checkAccess(irc, uid, channel, command):
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"""Checks the caller's access to Automode."""
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# Automode defines the following permissions, where <command> is either "manage", "list",
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# "sync", or "clear":
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# - automode.<command> OR automode.<command>.*: ability to <command> automode on all channels.
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# - automode.<command>.relay_owned: ability to <command> automode on channels owned via Relay.
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# If Relay isn't loaded, this permission check FAILS.
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# - automode.<command>.#channel: ability to <command> automode on the given channel.
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# - automode.savedb: ability to save the automode DB.
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log.debug('(%s) Automode: checking access for %s/%s for %s capability on %s', irc.name, uid,
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irc.getHostmask(uid), command, channel)
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baseperm = 'automode.%s' % command
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try:
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# First, check the catch all and channel permissions.
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perms = [baseperm, baseperm+'.*', '%s.%s' % (baseperm, channel)]
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return permissions.checkPermissions(irc, uid, perms)
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except utils.NotAuthorizedError:
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log.debug('(%s) Automode: falling back to automode.%s.relay_owned', irc.name, command)
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permissions.checkPermissions(irc, uid, [baseperm+'.relay_owned'], also_show=perms)
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relay = world.plugins.get('relay')
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if relay is None:
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raise utils.NotAuthorizedError("You are not authorized to use Automode when Relay is "
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"disabled. You are missing one of the following "
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"permissions: %s or %s.%s" % (baseperm, baseperm, channel))
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elif (irc.name, channel) not in relay.db:
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raise utils.NotAuthorizedError("The network you are on does not own the relay channel %s." % channel)
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return True
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def match(irc, channel, uids=None):
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"""
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Automode matcher engine.
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"""
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dbentry = db.get(irc.name+channel)
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if dbentry is None:
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return
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modebot_uid = modebot.uids.get(irc.name)
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# Check every mask defined in the channel ACL.
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outgoing_modes = []
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# If UIDs are given, match those. Otherwise, match all users in the given channel.
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uids = uids or irc.channels[channel].users
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for mask, modes in dbentry.items():
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for uid in uids:
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if irc.matchHost(mask, uid):
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# User matched a mask. Filter the mode list given to only those that are valid
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# prefix mode characters.
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outgoing_modes += [('+'+mode, uid) for mode in modes if mode in irc.prefixmodes]
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log.debug("(%s) automode: Filtered mode list of %s to %s (protocol:%s)",
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irc.name, modes, outgoing_modes, irc.protoname)
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# If the Automode bot is missing, send the mode through the PyLink server.
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if modebot_uid not in irc.users:
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modebot_uid = irc.sid
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log.debug("(%s) automode: sending modes from modebot_uid %s",
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irc.name, modebot_uid)
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irc.proto.mode(modebot_uid, channel, outgoing_modes)
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# Create a hook payload to support plugins like relay.
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irc.callHooks([modebot_uid, 'AUTOMODE_MODE',
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{'target': channel, 'modes': outgoing_modes, 'parse_as': 'MODE'}])
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def handle_join(irc, source, command, args):
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"""
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Automode JOIN listener. This sets modes accordingly if the person joining matches a mask in the
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ACL.
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"""
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channel = irc.toLower(args['channel'])
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match(irc, channel, args['users'])
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utils.add_hook(handle_join, 'JOIN')
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utils.add_hook(handle_join, 'PYLINK_RELAY_JOIN') # Handle the relay version of join
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utils.add_hook(handle_join, 'PYLINK_SERVICE_JOIN') # And the version for service bots
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def handle_services_login(irc, source, command, args):
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"""
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Handles services login change, to trigger Automode matching.
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"""
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for channel in irc.users[source].channels:
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# Look at all the users' channels for any possible changes.
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match(irc, channel, [source])
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utils.add_hook(handle_services_login, 'CLIENT_SERVICES_LOGIN')
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utils.add_hook(handle_services_login, 'PYLINK_RELAY_SERVICES_LOGIN')
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def setacc(irc, source, args):
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"""<channel> <mask> <mode list>
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Assigns the given prefix mode characters to the given mask for the channel given. Extended targets are supported for masks - use this to your advantage!
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Examples:
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SET #channel *!*@localhost ohv
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SET #channel $account v
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SET #channel $oper:Network?Administrator qo
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SET #staffchan $channel:#mainchan:op o
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"""
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try:
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channel, mask, modes = args
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except ValueError:
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reply(irc, "Error: Invalid arguments given. Needs 3: channel, mask, mode list.")
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return
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else:
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if not utils.isChannel(channel):
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reply(irc, "Error: Invalid channel name %s." % channel)
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return
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# Store channels case insensitively
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channel = irc.toLower(channel)
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checkAccess(irc, source, channel, 'manage')
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# Database entries for any network+channel pair are automatically created using
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# defaultdict. Note: string keys are used here instead of tuples so they can be
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# exported easily as JSON.
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dbentry = db[irc.name+channel]
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# Otherwise, update the modes as is.
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dbentry[mask] = modes
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log.info('(%s) %s set modes +%s for %s on %s', irc.name, irc.getHostmask(source), modes, mask, channel)
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reply(irc, "Done. \x02%s\x02 now has modes \x02%s\x02 in \x02%s\x02." % (mask, modes, channel))
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# Join the Automode bot to the channel if not explicitly told to.
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modebot.extra_channels[irc.name].add(channel)
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mbuid = modebot.uids.get(irc.name)
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if mbuid and mbuid not in irc.channels[channel].users:
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irc.proto.join(mbuid, channel)
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modebot.add_cmd(setacc, 'setaccess')
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modebot.add_cmd(setacc, 'set')
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modebot.add_cmd(setacc, featured=True)
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def delacc(irc, source, args):
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"""<channel> <mask>
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Removes the Automode entry for the given mask on the given channel, if one exists.
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"""
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try:
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channel, mask = args
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channel = irc.toLower(channel)
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except ValueError:
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reply(irc, "Error: Invalid arguments given. Needs 2: channel, mask")
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return
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checkAccess(irc, source, channel, 'manage')
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dbentry = db.get(irc.name+channel)
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if dbentry is None:
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reply(irc, "Error: no Automode access entries exist for \x02%s\x02." % channel)
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return
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if mask in dbentry:
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del dbentry[mask]
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log.info('(%s) %s removed modes for %s on %s', irc.name, irc.getHostmask(source), mask, channel)
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reply(irc, "Done. Removed the Automode access entry for \x02%s\x02 in \x02%s\x02." % (mask, channel))
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else:
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reply(irc, "Error: No Automode access entry for \x02%s\x02 exists in \x02%s\x02." % (mask, channel))
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# Remove channels if no more entries are left.
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if not dbentry:
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log.debug("Automode: purging empty channel pair %s/%s", irc.name, channel)
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del db[irc.name+channel]
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return
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modebot.add_cmd(delacc, 'delaccess')
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modebot.add_cmd(delacc, 'del')
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modebot.add_cmd(delacc, featured=True)
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def listacc(irc, source, args):
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"""<channel>
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Lists all Automode entries for the given channel."""
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try:
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channel = irc.toLower(args[0])
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except IndexError:
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reply(irc, "Error: Invalid arguments given. Needs 1: channel.")
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return
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checkAccess(irc, source, channel, 'list')
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dbentry = db.get(irc.name+channel)
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if not dbentry:
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reply(irc, "Error: No Automode access entries exist for \x02%s\x02." % channel)
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return
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else:
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# Iterate over all entries and print them. Do this in private to prevent channel
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# floods.
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reply(irc, "Showing Automode entries for \x02%s\x02:" % channel, private=True)
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for entrynum, entry in enumerate(dbentry.items(), start=1):
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mask, modes = entry
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reply(irc, "[%s] \x02%s\x02 has modes +\x02%s\x02" % (entrynum, mask, modes), private=True)
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reply(irc, "End of Automode entries list.", private=True)
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modebot.add_cmd(listacc, featured=True)
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modebot.add_cmd(listacc, 'listaccess')
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def save(irc, source, args):
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"""takes no arguments.
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Saves the Automode database to disk."""
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permissions.checkPermissions(irc, source, ['automode.savedb'])
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exportDB()
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reply(irc, 'Done.')
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modebot.add_cmd(save)
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def syncacc(irc, source, args):
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"""<channel>
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Syncs Automode access lists to the channel.
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"""
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try:
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channel = irc.toLower(args[0])
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except IndexError:
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reply(irc, "Error: Invalid arguments given. Needs 1: channel.")
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return
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checkAccess(irc, source, channel, 'sync')
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log.info('(%s) %s synced modes on %s', irc.name, irc.getHostmask(source), channel)
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match(irc, channel)
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reply(irc, 'Done.')
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modebot.add_cmd(syncacc, featured=True)
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modebot.add_cmd(syncacc, 'sync')
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modebot.add_cmd(syncacc, 'syncaccess')
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def clearacc(irc, source, args):
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"""<channel>
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Removes all Automode entries for the given channel.
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"""
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try:
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channel = irc.toLower(args[0])
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except IndexError:
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reply(irc, "Error: Invalid arguments given. Needs 1: channel.")
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return
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checkAccess(irc, source, channel, 'clear')
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if db.get(irc.name+channel):
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log.debug("Automode: purging channel pair %s/%s", irc.name, channel)
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del db[irc.name+channel]
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log.info('(%s) %s cleared modes on %s', irc.name, irc.getHostmask(source), channel)
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reply(irc, "Done. Removed all Automode access entries for \x02%s\x02." % channel)
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else:
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reply(irc, "Error: No Automode access entries exist for \x02%s\x02." % channel)
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modebot.add_cmd(clearacc, 'clearaccess')
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modebot.add_cmd(clearacc, 'clear')
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modebot.add_cmd(clearacc, featured=True)
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