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Add (experimental) support for matching extbans (#498)

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This commit is contained in:
James Lu 2017-08-23 21:18:44 -07:00
parent 903f86a342
commit de1a6379df
5 changed files with 87 additions and 38 deletions
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2
classes.py
View File

@ -165,6 +165,8 @@ class PyLinkNetworkCore(utils.DeprecatedAttributesObject, utils.CamelCaseToSnake
# Acting extbans such as +b m:n!u@h on InspIRCd
self.extbans_acting = {}
# Matching extbans such as R:account on InspIRCd and $a:account on TS6.
self. extbans_matching = {}
# This max nick length starts off as the config value, but may be
# overwritten later by the protocol module if such information is

66
plugins/relay.py
View File

@ -830,24 +830,19 @@ def get_supported_cmodes(irc, remoteirc, channel, modes):
irc.name, modechar, arg)
break
elif name in ('ban', 'banexception', 'invex', 'quiet') and not utils.isHostmask(arg):
# Don't add bans that don't match n!u@h syntax!
log.debug("(%s) relay.get_supported_cmodes: skipping mode (%r, %r) because it doesn't match nick!user@host syntax.",
irc.name, modechar, arg)
break
supported_char = remoteirc.cmodes.get(name)
# The mode we requested is an extban on the target network.
# Basically there are 3 possibilities when handling extban-like modes:
# The mode we requested is an acting extban on the target network.
# Basically there are 3 possibilities when handling these extban-like modes:
# 1) Both target & source both use a chmode (e.g. ts6 +q). In these cases, the mode is just forwarded as-is.
# 2) Forwarding from chmode to extban - this is the case being handled here.
# 3) Forwarding from extban to extban (see below)
pending_acting_extban_prefix = None
if name in remoteirc.extbans_acting:
# We make the assumption that acting extbans can only be used with +b...
old_arg = arg
supported_char = remoteirc.cmodes['ban']
arg = remoteirc.extbans_acting[name] + arg # Add the extban prefix
pending_acting_extban_prefix = name # Save the extban prefix for joining later
log.debug('(%s) relay.get_supported_cmodes: folding mode %s%s %s to %s%s %s for %s',
irc.name, prefix, modechar, old_arg, prefix, supported_char, arg, remoteirc.name)
elif supported_char is None:
@ -888,8 +883,8 @@ def get_supported_cmodes(irc, remoteirc, channel, modes):
log.debug("(%s) relay.get_supported_cmodes: skipping setting %s on %s/%s because it appears to be already set.",
irc.name, name, arg, remoteirc.name)
break
# Extban case 3: forwarding extban -> extban or mode
elif arg:
# Acting extban case 3: forwarding extban -> extban or mode
# First, we expand extbans from the local IRCd into a named mode and argument pair. Then, we
# can figure out how to relay it.
for extban_name, extban_prefix in irc.extbans_acting.items():
@ -906,9 +901,11 @@ def get_supported_cmodes(irc, remoteirc, channel, modes):
supported_char = remoteirc.cmodes[extban_name]
arg = arg[len(extban_prefix):]
elif extban_name in remoteirc.extbans_acting:
# This is also an extban on the target network. We broke up the extban already,
# so rewrite it into a new mode by joining the prefix and data together.
arg = remoteirc.extbans_acting[extban_name] + arg[len(extban_prefix):]
# This is also an extban on the target network.
# Just chop off the local prefix now; we rewrite it later after processing
# any matching extbans.
pending_acting_extban_prefix = extban_name
arg = arg[len(extban_prefix):]
else:
# This mode/extban isn't supported, so ignore it.
log.debug('(%s) relay.get_supported_cmodes: blocking extban %s%s %s expansion as target %s doesn\'t support it',
@ -921,6 +918,47 @@ def get_supported_cmodes(irc, remoteirc, channel, modes):
supported_char, arg, remoteirc.name)
break # Only one extban per mode pair, so break.
# Handle matching extbans such as Charybdis $a, UnrealIRCd ~a, InspIRCd R:, etc.
for extban_name, extban_prefix in irc.extbans_matching.items():
# For matching extbans, we check for the following:
# 1) arg == extban, for extbans like Charybdis $o and $a that are valid without an argument.
# 2) arg starting with extban, the most general case.
# Extbans with and without args have different mode names to prevent ambiguity and
# allow proper forwarding.
old_arg = arg
if arg == extban_prefix:
# This is a matching extban with no arg (case 1).
if extban_name in remoteirc.extbans_matching:
# Replace the ban with the remote's version entirely.
arg = remoteirc.extbans_matching[extban_name]
log.debug('(%s) relay.get_supported_cmodes: mangling mode %s%s %s to %s%s %s for %s',
irc.name, prefix, modechar, old_arg, prefix, supported_char, arg, remoteirc.name)
break
else:
# Unsupported, don't forward it.
mode_parse_aborted = True
elif arg.startswith(extban_prefix):
# This is a full extban with a prefix and some data.
if extban_name in remoteirc.extbans_matching:
# Chop off our prefix and apply the remote's.
arg = arg[len(extban_prefix):]
arg = remoteirc.extbans_matching[extban_name] + arg
log.debug('(%s) relay.get_supported_cmodes: mangling mode %s%s %s to %s%s %s for %s',
irc.name, prefix, modechar, old_arg, prefix, supported_char, arg, remoteirc.name)
break
else:
mode_parse_aborted = True
else:
if name in ('ban', 'banexception', 'invex', 'quiet') and not utils.isHostmask(arg):
# Don't add unsupported bans that don't match n!u@h syntax.
log.debug("(%s) relay.get_supported_cmodes: skipping unsupported extban/mode (%r, %r) because it doesn't match nick!user@host.",
irc.name, modechar, arg)
break
# We broke up an acting extban earlier. Now, rewrite it into a new mode by joining the prefix and data together.
if pending_acting_extban_prefix:
arg = remoteirc.extbans_acting[pending_acting_extban_prefix] + arg
if mode_parse_aborted:
break
final_modepair = (prefix+supported_char, arg)

2
protocols/inspircd.py
View File

@ -412,6 +412,8 @@ class InspIRCdProtocol(TS6BaseProtocol):
# Extban definitions
self.extbans_acting = {'quiet': 'm:', 'ban_nonick': 'n:'}
self.extbans_matching = {'ban_inchannel': 'j:', 'ban_realname': 'r:', 'ban_server': 's:',
'ban_certfp': 'z:', 'ban_opertype': 'O:', 'ban_account': 'R:'}
def handle_capab(self, source, command, args):
"""

5
protocols/ts6.py
View File

@ -307,6 +307,11 @@ class TS6Protocol(TS6BaseProtocol):
'*A': '', '*B': '', '*C': '', '*D': 'DSaiowsQRgzlxp'}
self.umodes = chary_umodes
# Charybdis extbans
self.extbans_matching = {'ban_all_registered': '$a', 'ban_inchannel': '$c:', 'ban_account': '$a:',
'ban_all_opers': '$o', 'ban_realname': '$r:', 'ban_server': '$s:',
'ban_banshare': '$j:', 'ban_extgecos': '$x:', 'ban_all_ssl': '$z'}
# Find the target IRCd and update the mode dictionaries as applicable.
target_ircd = self.serverdata.get('ircd', 'elemental' if self.serverdata.get('use_elemental_modes') else 'charybdis')
target_ircd = target_ircd.lower()

2
protocols/unreal.py
View File

@ -374,6 +374,8 @@ class UnrealProtocol(TS6BaseProtocol):
# Extban definitions
self.extbans_acting = {'quiet': '~q:', 'ban_nonick': '~n:'}
self.extbans_matching = {'ban_account': '~a:', 'ban_inchannel': '~c:', 'ban_opertype': '~o:',
'ban_realname': '~r:', 'ban_account_legacy': '~R:', 'ban_certfp': '~S:'}
def handle_eos(self, numeric, command, args):
"""EOS is used to denote end of burst."""