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Add (experimental) support for matching extbans (#498)
This commit is contained in:
James Lu
parent
903f86a342
commit
de1a6379df
@ -165,6 +165,8 @@ class PyLinkNetworkCore(utils.DeprecatedAttributesObject, utils.CamelCaseToSnake
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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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114
plugins/relay.py
114
plugins/relay.py
@ -830,24 +830,19 @@ def get_supported_cmodes(irc, remoteirc, channel, modes):
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irc.name, modechar, arg)
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break
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elif name in ('ban', 'banexception', 'invex', 'quiet') and not utils.isHostmask(arg):
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# Don't add bans that don't match n!u@h syntax!
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log.debug("(%s) relay.get_supported_cmodes: skipping mode (%r, %r) because it doesn't match nick!user@host syntax.",
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irc.name, modechar, arg)
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break
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supported_char = remoteirc.cmodes.get(name)
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# The mode we requested is an extban on the target network.
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# Basically there are 3 possibilities when handling extban-like modes:
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# The mode we requested is an acting extban on the target network.
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# Basically there are 3 possibilities when handling these extban-like modes:
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# 1) Both target & source both use a chmode (e.g. ts6 +q). In these cases, the mode is just forwarded as-is.
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# 2) Forwarding from chmode to extban - this is the case being handled here.
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# 3) Forwarding from extban to extban (see below)
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pending_acting_extban_prefix = None
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if name in remoteirc.extbans_acting:
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# We make the assumption that acting extbans can only be used with +b...
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old_arg = arg
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supported_char = remoteirc.cmodes['ban']
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arg = remoteirc.extbans_acting[name] + arg # Add the extban prefix
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pending_acting_extban_prefix = name # Save the extban prefix for joining later
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log.debug('(%s) relay.get_supported_cmodes: folding mode %s%s %s to %s%s %s for %s',
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irc.name, prefix, modechar, old_arg, prefix, supported_char, arg, remoteirc.name)
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elif supported_char is None:
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@ -888,38 +883,81 @@ def get_supported_cmodes(irc, remoteirc, channel, modes):
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log.debug("(%s) relay.get_supported_cmodes: skipping setting %s on %s/%s because it appears to be already set.",
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irc.name, name, arg, remoteirc.name)
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break
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elif arg:
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# Acting extban case 3: forwarding extban -> extban or mode
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# First, we expand extbans from the local IRCd into a named mode and argument pair. Then, we
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# can figure out how to relay it.
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for extban_name, extban_prefix in irc.extbans_acting.items():
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log.debug('(%s) relay.get_supported_cmodes: checking for extban that needs expansion: '
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'name=%s, extban_name=%s, arg=%s, extban_prefix=%s', irc.name, name, extban_name, arg,
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extban_prefix)
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# Acting extbans are only supported with +b (e.g. +b m:n!u@h)
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if name == 'ban' and arg.startswith(extban_prefix):
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orig_supported_char, old_arg = supported_char, arg
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# Extban case 3: forwarding extban -> extban or mode
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# First, we expand extbans from the local IRCd into a named mode and argument pair. Then, we
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# can figure out how to relay it.
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for extban_name, extban_prefix in irc.extbans_acting.items():
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log.debug('(%s) relay.get_supported_cmodes: checking for extban that needs expansion: '
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'name=%s, extban_name=%s, arg=%s, extban_prefix=%s', irc.name, name, extban_name, arg,
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extban_prefix)
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# Acting extbans are only supported with +b (e.g. +b m:n!u@h)
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if name == 'ban' and arg.startswith(extban_prefix):
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orig_supported_char, old_arg = supported_char, arg
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if extban_name in remoteirc.cmodes:
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# This extban is a mode on the target network. Chop off the extban prefix and set
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# the mode character to the target's mode for it.
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supported_char = remoteirc.cmodes[extban_name]
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arg = arg[len(extban_prefix):]
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elif extban_name in remoteirc.extbans_acting:
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# This is also an extban on the target network.
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# Just chop off the local prefix now; we rewrite it later after processing
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# any matching extbans.
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pending_acting_extban_prefix = extban_name
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arg = arg[len(extban_prefix):]
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else:
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# This mode/extban isn't supported, so ignore it.
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log.debug('(%s) relay.get_supported_cmodes: blocking extban %s%s %s expansion as target %s doesn\'t support it',
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irc.name, prefix, supported_char, arg, remoteirc.name)
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mode_parse_aborted = True # XXX: nested loops are ugly...
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if extban_name in remoteirc.cmodes:
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# This extban is a mode on the target network. Chop off the extban prefix and set
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# the mode character to the target's mode for it.
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supported_char = remoteirc.cmodes[extban_name]
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arg = arg[len(extban_prefix):]
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elif extban_name in remoteirc.extbans_acting:
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# This is also an extban on the target network. We broke up the extban already,
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# so rewrite it into a new mode by joining the prefix and data together.
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arg = remoteirc.extbans_acting[extban_name] + arg[len(extban_prefix):]
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else:
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# This mode/extban isn't supported, so ignore it.
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log.debug('(%s) relay.get_supported_cmodes: blocking extban %s%s %s expansion as target %s doesn\'t support it',
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irc.name, prefix, supported_char, arg, remoteirc.name)
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mode_parse_aborted = True # XXX: nested loops are ugly...
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if not mode_parse_aborted:
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log.debug('(%s) relay.get_supported_cmodes: expanding extban %s%s %s to %s%s %s for %s',
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irc.name, prefix, orig_supported_char, old_arg, prefix,
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supported_char, arg, remoteirc.name)
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break # Only one extban per mode pair, so break.
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if not mode_parse_aborted:
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log.debug('(%s) relay.get_supported_cmodes: expanding extban %s%s %s to %s%s %s for %s',
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irc.name, prefix, orig_supported_char, old_arg, prefix,
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supported_char, arg, remoteirc.name)
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break # Only one extban per mode pair, so break.
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# Handle matching extbans such as Charybdis $a, UnrealIRCd ~a, InspIRCd R:, etc.
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for extban_name, extban_prefix in irc.extbans_matching.items():
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# For matching extbans, we check for the following:
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# 1) arg == extban, for extbans like Charybdis $o and $a that are valid without an argument.
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# 2) arg starting with extban, the most general case.
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# Extbans with and without args have different mode names to prevent ambiguity and
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# allow proper forwarding.
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old_arg = arg
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if arg == extban_prefix:
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# This is a matching extban with no arg (case 1).
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if extban_name in remoteirc.extbans_matching:
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# Replace the ban with the remote's version entirely.
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arg = remoteirc.extbans_matching[extban_name]
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log.debug('(%s) relay.get_supported_cmodes: mangling mode %s%s %s to %s%s %s for %s',
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irc.name, prefix, modechar, old_arg, prefix, supported_char, arg, remoteirc.name)
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break
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else:
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# Unsupported, don't forward it.
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mode_parse_aborted = True
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elif arg.startswith(extban_prefix):
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# This is a full extban with a prefix and some data.
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if extban_name in remoteirc.extbans_matching:
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# Chop off our prefix and apply the remote's.
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arg = arg[len(extban_prefix):]
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arg = remoteirc.extbans_matching[extban_name] + arg
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log.debug('(%s) relay.get_supported_cmodes: mangling mode %s%s %s to %s%s %s for %s',
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irc.name, prefix, modechar, old_arg, prefix, supported_char, arg, remoteirc.name)
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break
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else:
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mode_parse_aborted = True
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else:
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if name in ('ban', 'banexception', 'invex', 'quiet') and not utils.isHostmask(arg):
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# Don't add unsupported bans that don't match n!u@h syntax.
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log.debug("(%s) relay.get_supported_cmodes: skipping unsupported extban/mode (%r, %r) because it doesn't match nick!user@host.",
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irc.name, modechar, arg)
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break
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# We broke up an acting extban earlier. Now, rewrite it into a new mode by joining the prefix and data together.
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if pending_acting_extban_prefix:
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arg = remoteirc.extbans_acting[pending_acting_extban_prefix] + arg
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if mode_parse_aborted:
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break
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@ -412,6 +412,8 @@ class InspIRCdProtocol(TS6BaseProtocol):
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# Extban definitions
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self.extbans_acting = {'quiet': 'm:', 'ban_nonick': 'n:'}
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self.extbans_matching = {'ban_inchannel': 'j:', 'ban_realname': 'r:', 'ban_server': 's:',
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'ban_certfp': 'z:', 'ban_opertype': 'O:', 'ban_account': 'R:'}
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def handle_capab(self, source, command, args):
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"""
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@ -307,6 +307,11 @@ class TS6Protocol(TS6BaseProtocol):
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'*A': '', '*B': '', '*C': '', '*D': 'DSaiowsQRgzlxp'}
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self.umodes = chary_umodes
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# Charybdis extbans
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self.extbans_matching = {'ban_all_registered': '$a', 'ban_inchannel': '$c:', 'ban_account': '$a:',
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'ban_all_opers': '$o', 'ban_realname': '$r:', 'ban_server': '$s:',
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'ban_banshare': '$j:', 'ban_extgecos': '$x:', 'ban_all_ssl': '$z'}
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# Find the target IRCd and update the mode dictionaries as applicable.
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target_ircd = self.serverdata.get('ircd', 'elemental' if self.serverdata.get('use_elemental_modes') else 'charybdis')
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target_ircd = target_ircd.lower()
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@ -374,6 +374,8 @@ class UnrealProtocol(TS6BaseProtocol):
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# Extban definitions
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self.extbans_acting = {'quiet': '~q:', 'ban_nonick': '~n:'}
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self.extbans_matching = {'ban_account': '~a:', 'ban_inchannel': '~c:', 'ban_opertype': '~o:',
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'ban_realname': '~r:', 'ban_account_legacy': '~R:', 'ban_certfp': '~S:'}
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def handle_eos(self, numeric, command, args):
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"""EOS is used to denote end of burst."""
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