2016-03-26 00:39:20 +01:00
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# servprotect.py: Protects against KILL and nick collision floods
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from expiringdict import ExpiringDict
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2016-06-21 03:18:54 +02:00
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from pylinkirc import utils
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from pylinkirc.log import log
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2016-03-26 00:39:20 +01:00
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# TODO: make length and time configurable
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savecache = ExpiringDict(max_len=5, max_age_seconds=10)
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killcache = ExpiringDict(max_len=5, max_age_seconds=10)
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def handle_kill(irc, numeric, command, args):
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"""
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Tracks kills against PyLink clients. If too many are received,
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automatically disconnects from the network.
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"""
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if killcache.setdefault(irc.name, 1) >= 5:
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log.error('(%s) servprotect: Too many kills received, aborting!', irc.name)
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irc.disconnect()
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log.debug('(%s) servprotect: Incrementing killcache by 1', irc.name)
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killcache[irc.name] += 1
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utils.add_hook(handle_kill, 'KILL')
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def handle_save(irc, numeric, command, args):
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"""
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Tracks SAVEs (nick collision) against PyLink clients. If too many are received,
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automatically disconnects from the network.
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"""
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if savecache.setdefault(irc.name, 0) >= 5:
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log.error('(%s) servprotect: Too many nick collisions, aborting!', irc.name)
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irc.disconnect()
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log.debug('(%s) servprotect: Incrementing savecache by 1', irc.name)
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savecache[irc.name] += 1
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utils.add_hook(handle_save, 'SAVE')
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