mirror of
https://github.com/jlu5/PyLink.git
synced 2025-11-04 00:47:21 +01:00
relay: add locks in db read/writes (thread safety)
This commit is contained in:
James Lu
parent
e40b2f6529
commit
2b4943a780
293
plugins/relay.py
293
plugins/relay.py
@ -14,6 +14,7 @@ relayusers = defaultdict(dict)
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relayservers = defaultdict(dict)
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spawnlocks = defaultdict(threading.RLock)
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spawnlocks_servers = defaultdict(threading.RLock)
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db_lock = threading.RLock()
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dbname = utils.getDatabaseName('pylinkrelay')
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datastore = structures.PickleDataStore('pylinkrelay', dbname)
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@ -34,15 +35,16 @@ def initializeAll(irc):
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# which would break connections.
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world.started.wait(2)
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for chanpair, entrydata in db.items():
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# Iterate over all the channels stored in our relay links DB.
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network, channel = chanpair
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with db_lock:
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for chanpair, entrydata in db.items():
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# Iterate over all the channels stored in our relay links DB.
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network, channel = chanpair
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# Initialize each relay channel on their home network, and on every linked one too.
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initializeChannel(irc, channel)
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for link in entrydata['links']:
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network, channel = link
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# Initialize each relay channel on their home network, and on every linked one too.
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initializeChannel(irc, channel)
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for link in entrydata['links']:
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network, channel = link
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initializeChannel(irc, channel)
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def main(irc=None):
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"""Main function, called during plugin loading at start."""
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@ -410,12 +412,13 @@ def getOrigUser(irc, user, targetirc=None):
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def getRelay(chanpair):
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"""Finds the matching relay entry name for the given (network name, channel)
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pair, if one exists."""
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if chanpair in db: # This chanpair is a shared channel; others link to it
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return chanpair
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# This chanpair is linked *to* a remote channel
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for name, dbentry in db.items():
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if chanpair in dbentry['links']:
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return name
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with db_lock:
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if chanpair in db: # This chanpair is a shared channel; others link to it
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return chanpair
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# This chanpair is linked *to* a remote channel
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for name, dbentry in db.items():
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if chanpair in dbentry['links']:
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return name
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def getRemoteChan(irc, remoteirc, channel):
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"""Returns the linked channel name for the given channel on remoteirc,
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@ -428,9 +431,10 @@ def getRemoteChan(irc, remoteirc, channel):
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if chanpair[0] == remotenetname:
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return chanpair[1]
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else:
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for link in db[chanpair]['links']:
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if link[0] == remotenetname:
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return link[1]
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with db_lock:
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for link in db[chanpair]['links']:
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if link[0] == remotenetname:
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return link[1]
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def initializeChannel(irc, channel):
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"""Initializes a relay channel (merge local/remote users, set modes, etc.)."""
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@ -441,8 +445,9 @@ def initializeChannel(irc, channel):
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log.debug('(%s) relay.initializeChannel: relay pair found to be %s', irc.name, relay)
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queued_users = []
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if relay:
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all_links = db[relay]['links'].copy()
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all_links.update((relay,))
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with db_lock:
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all_links = db[relay]['links'].copy()
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all_links.update((relay,))
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log.debug('(%s) relay.initializeChannel: all_links: %s', irc.name, all_links)
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# Iterate over all the remote channels linked in this relay.
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@ -524,12 +529,14 @@ def checkClaim(irc, channel, sender, chanobj=None):
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sender_modes = getPrefixModes(irc, irc, channel, sender, mlist=mlist)
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log.debug('(%s) relay.checkClaim: sender modes (%s/%s) are %s (mlist=%s)', irc.name,
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sender, channel, sender_modes, mlist)
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# XXX: stop hardcoding modes to check for and support mlist in isHalfopPlus and friends
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return (not relay) or irc.name == relay[0] or not db[relay]['claim'] or \
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irc.name in db[relay]['claim'] or \
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any([mode in sender_modes for mode in ('y', 'q', 'a', 'o', 'h')]) \
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or irc.isInternalClient(sender) or \
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irc.isInternalServer(sender)
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with db_lock:
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return (not relay) or irc.name == relay[0] or not db[relay]['claim'] or \
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irc.name in db[relay]['claim'] or \
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any([mode in sender_modes for mode in ('y', 'q', 'a', 'o', 'h')]) \
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or irc.isInternalClient(sender) or \
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irc.isInternalServer(sender)
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def getSupportedUmodes(irc, remoteirc, modes):
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"""Given a list of user modes, filters out all of those not supported by the
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@ -1542,9 +1549,10 @@ def create(irc, source, args):
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creator = irc.getHostmask(source)
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# Create the relay database entry with the (network name, channel name)
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# pair - this is just a dict with various keys.
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db[(irc.name, channel)] = {'claim': [irc.name], 'links': set(),
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'blocked_nets': set(), 'creator': creator,
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'ts': time.time()}
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with db_lock:
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db[(irc.name, channel)] = {'claim': [irc.name], 'links': set(),
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'blocked_nets': set(), 'creator': creator,
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'ts': time.time()}
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log.info('(%s) relay: Channel %s created by %s.', irc.name, channel, creator)
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initializeChannel(irc, channel)
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irc.reply('Done.')
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@ -1554,9 +1562,10 @@ def _stop_relay(entry):
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"""Internal function to deinitialize a relay link and its leaves."""
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network, channel = entry
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# Iterate over all the channel links and deinitialize them.
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for link in db[entry]['links']:
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removeChannel(world.networkobjects.get(link[0]), link[1])
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removeChannel(world.networkobjects.get(network), channel)
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with db_lock:
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for link in db[entry]['links']:
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removeChannel(world.networkobjects.get(link[0]), link[1])
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removeChannel(world.networkobjects.get(network), channel)
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def destroy(irc, source, args):
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"""[<home network>] <channel>
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@ -1586,17 +1595,18 @@ def destroy(irc, source, args):
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entry = (network, channel)
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if entry in db:
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_stop_relay(entry)
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del db[entry]
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with db_lock:
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if entry in db:
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_stop_relay(entry)
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del db[entry]
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log.info('(%s) relay: Channel %s destroyed by %s.', irc.name,
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channel, irc.getHostmask(source))
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irc.reply('Done.')
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else:
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irc.error("No such channel %r exists. If you're trying to delink a channel from "
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"another network, use the DESTROY command." % channel)
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return
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log.info('(%s) relay: Channel %s destroyed by %s.', irc.name,
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channel, irc.getHostmask(source))
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irc.reply('Done.')
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else:
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irc.error("No such channel %r exists. If you're trying to delink a channel from "
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"another network, use the DESTROY command." % channel)
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return
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destroy = utils.add_cmd(destroy, featured=True)
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@utils.add_cmd
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@ -1613,20 +1623,20 @@ def purge(irc, source, args):
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count = 0
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### XXX lock to make this thread safe!
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for entry in db.copy():
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# Entry was owned by the target network; remove it
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if entry[0] == network:
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count += 1
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_stop_relay(entry)
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del db[entry]
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else:
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# Drop leaf channels involving the target network
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for link in db[entry]['links'].copy():
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if link[0] == network:
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count += 1
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removeChannel(world.networkobjects.get(network), link[1])
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db[entry]['links'].remove(link)
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with db_lock:
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for entry in db.copy():
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# Entry was owned by the target network; remove it
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if entry[0] == network:
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count += 1
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_stop_relay(entry)
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del db[entry]
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else:
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# Drop leaf channels involving the target network
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for link in db[entry]['links'].copy():
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if link[0] == network:
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count += 1
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removeChannel(world.networkobjects.get(network), link[1])
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db[entry]['links'].remove(link)
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irc.reply("Done. Purged %s entries involving the network %s." % (count, network))
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@ -1686,7 +1696,8 @@ def link(irc, source, args):
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return
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try:
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entry = db[(remotenet, channel)]
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with db_lock:
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entry = db[(remotenet, channel)]
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except KeyError:
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irc.error('No such relay %r exists.' % channel)
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return
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@ -1747,13 +1758,15 @@ def delink(irc, source, args):
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"network).")
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return
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else:
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for link in db[entry]['links'].copy():
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if link[0] == remotenet:
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removeChannel(world.networkobjects.get(remotenet), link[1])
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db[entry]['links'].remove(link)
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with db_lock:
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for link in db[entry]['links'].copy():
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if link[0] == remotenet:
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removeChannel(world.networkobjects.get(remotenet), link[1])
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db[entry]['links'].remove(link)
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else:
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removeChannel(irc, channel)
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db[entry]['links'].remove((irc.name, channel))
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with db_lock:
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db[entry]['links'].remove((irc.name, channel))
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irc.reply('Done.')
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log.info('(%s) relay: Channel %s delinked from %s%s by %s.', irc.name,
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channel, entry[0], entry[1], irc.getHostmask(source))
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@ -1788,58 +1801,59 @@ def linked(irc, source, args):
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irc.reply("Showing channels linked to %s:" % net, private=True)
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# Sort the list of shared channels when displaying
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for k, v in sorted(db.items()):
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with db_lock:
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for k, v in sorted(db.items()):
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# Skip if we're filtering by network and the network given isn't relayed
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# to the channel.
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if net and not (net == k[0] or net in [link[0] for link in v['links']]):
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continue
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# Skip if we're filtering by network and the network given isn't relayed
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# to the channel.
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if net and not (net == k[0] or net in [link[0] for link in v['links']]):
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continue
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# Bold each network/channel name pair
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s = '\x02%s%s\x02 ' % k
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remoteirc = world.networkobjects.get(k[0])
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channel = k[1] # Get the channel name from the network/channel pair
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# Bold each network/channel name pair
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s = '\x02%s%s\x02 ' % k
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remoteirc = world.networkobjects.get(k[0])
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channel = k[1] # Get the channel name from the network/channel pair
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if remoteirc and channel in remoteirc.channels:
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c = remoteirc.channels[channel]
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if ('s', None) in c.modes or ('p', None) in c.modes:
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# Only show secret channels to opers or those in the channel, and tag them as
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# [secret].
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localchan = getRemoteChan(remoteirc, irc, channel)
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if irc.isOper(source) or (localchan and source in irc.channels[localchan].users):
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s += '\x02[secret]\x02 '
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else:
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continue
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if remoteirc and channel in remoteirc.channels:
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c = remoteirc.channels[channel]
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if ('s', None) in c.modes or ('p', None) in c.modes:
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# Only show secret channels to opers or those in the channel, and tag them as
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# [secret].
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localchan = getRemoteChan(remoteirc, irc, channel)
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if irc.isOper(source) or (localchan and source in irc.channels[localchan].users):
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s += '\x02[secret]\x02 '
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else:
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continue
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if v['links']:
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# Sort, join up and output all the linked channel names. Silently drop
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# entries for disconnected networks.
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s += ' '.join([''.join(link) for link in sorted(v['links']) if link[0] in world.networkobjects
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and world.networkobjects[link[0]].connected.is_set()])
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if v['links']:
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# Sort, join up and output all the linked channel names. Silently drop
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# entries for disconnected networks.
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s += ' '.join([''.join(link) for link in sorted(v['links']) if link[0] in world.networkobjects
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and world.networkobjects[link[0]].connected.is_set()])
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else: # Unless it's empty; then, well... just say no relays yet.
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s += '(no relays yet)'
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else: # Unless it's empty; then, well... just say no relays yet.
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s += '(no relays yet)'
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irc.reply(s, private=True)
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irc.reply(s, private=True)
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if irc.isOper(source):
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s = ''
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if irc.isOper(source):
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s = ''
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# If the caller is an oper, we can show the hostmasks of people
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# that created all the available channels (Janus does this too!!)
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creator = v.get('creator')
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if creator:
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# But only if the value actually exists (old DBs will have it
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# missing).
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s += ' by \x02%s\x02' % creator
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# If the caller is an oper, we can show the hostmasks of people
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# that created all the available channels (Janus does this too!!)
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creator = v.get('creator')
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if creator:
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# But only if the value actually exists (old DBs will have it
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# missing).
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s += ' by \x02%s\x02' % creator
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# Ditto for creation date
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ts = v.get('ts')
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if ts:
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s += ' on %s' % time.ctime(ts)
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# Ditto for creation date
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ts = v.get('ts')
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if ts:
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s += ' on %s' % time.ctime(ts)
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if s: # Indent to make the list look nicer
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irc.reply(' Channel created%s.' % s, private=True)
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if s: # Indent to make the list look nicer
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irc.reply(' Channel created%s.' % s, private=True)
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linked = utils.add_cmd(linked, featured=True)
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@utils.add_cmd
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@ -1864,30 +1878,32 @@ def linkacl(irc, source, args):
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if not relay:
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irc.error('No such relay %r exists.' % channel)
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return
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if cmd == 'list':
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permissions.checkPermissions(irc, source, ['relay.linkacl.view'])
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s = 'Blocked networks for \x02%s\x02: \x02%s\x02' % (channel, ', '.join(db[relay]['blocked_nets']) or '(empty)')
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irc.reply(s)
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return
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permissions.checkPermissions(irc, source, ['relay.linkacl'])
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try:
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remotenet = args[2]
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except IndexError:
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irc.error(missingargs)
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return
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if cmd == 'deny':
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db[relay]['blocked_nets'].add(remotenet)
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irc.reply('Done.')
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elif cmd == 'allow':
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with db_lock:
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if cmd == 'list':
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permissions.checkPermissions(irc, source, ['relay.linkacl.view'])
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s = 'Blocked networks for \x02%s\x02: \x02%s\x02' % (channel, ', '.join(db[relay]['blocked_nets']) or '(empty)')
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irc.reply(s)
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return
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permissions.checkPermissions(irc, source, ['relay.linkacl'])
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try:
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db[relay]['blocked_nets'].remove(remotenet)
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except KeyError:
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irc.error('Network %r is not on the blacklist for %r.' % (remotenet, channel))
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else:
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remotenet = args[2]
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except IndexError:
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irc.error(missingargs)
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return
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if cmd == 'deny':
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db[relay]['blocked_nets'].add(remotenet)
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irc.reply('Done.')
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else:
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irc.error('Unknown subcommand %r: valid ones are ALLOW, DENY, and LIST.' % cmd)
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elif cmd == 'allow':
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try:
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db[relay]['blocked_nets'].remove(remotenet)
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except KeyError:
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irc.error('Network %r is not on the blacklist for %r.' % (remotenet, channel))
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else:
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irc.reply('Done.')
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else:
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irc.error('Unknown subcommand %r: valid ones are ALLOW, DENY, and LIST.' % cmd)
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@utils.add_cmd
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def showuser(irc, source, args):
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@ -1982,20 +1998,21 @@ def claim(irc, source, args):
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# We override getRelay() here to limit the search to the current network.
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relay = (irc.name, channel)
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if relay not in db:
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irc.error('No such relay %r exists.' % channel)
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return
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claimed = db[relay]["claim"]
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try:
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nets = args[1].strip()
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except IndexError: # No networks given.
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irc.reply('Channel \x02%s\x02 is claimed by: %s' %
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(channel, ', '.join(claimed) or '\x1D(none)\x1D'))
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else:
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if nets == '-' or not nets:
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claimed = set()
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with db_lock:
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if relay not in db:
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irc.error('No such relay %r exists.' % channel)
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return
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claimed = db[relay]["claim"]
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try:
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nets = args[1].strip()
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except IndexError: # No networks given.
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irc.reply('Channel \x02%s\x02 is claimed by: %s' %
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(channel, ', '.join(claimed) or '\x1D(none)\x1D'))
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else:
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claimed = set(nets.split(','))
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db[relay]["claim"] = claimed
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irc.reply('CLAIM for channel \x02%s\x02 set to: %s' %
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(channel, ', '.join(claimed) or '\x1D(none)\x1D'))
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if nets == '-' or not nets:
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claimed = set()
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else:
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claimed = set(nets.split(','))
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db[relay]["claim"] = claimed
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irc.reply('CLAIM for channel \x02%s\x02 set to: %s' %
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(channel, ', '.join(claimed) or '\x1D(none)\x1D'))
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