250 lines
9.1 KiB
ReStructuredText
250 lines
9.1 KiB
ReStructuredText
Channel modes
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=============
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``+b``, channel ban
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-------------------
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Bans take one parameter which can take several forms. The most common
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form is ``+b nick!user@host``. The wildcards ``*`` and ``?`` are allowed, matching
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zero-or-more, and exactly-one characters respectively. The masks will be
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trimmed to fit the maximum allowable length for the relevant element.
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Bans are also checked against the IP address, even if it resolved or is
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spoofed. CIDR is supported, like ``*!*@10.0.0.0/8``. This is most useful
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with IPv6. Bans are not checked against the real hostname behind any
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kind of spoof, except if host mangling is in use (e.g.
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``extensions/ip_cloaking.so``): if the user's host is mangled, their
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real hostname is checked additionally, and if a user has no spoof but
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could enable mangling, the mangled form of their hostname is checked
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additionally. Hence, it is not possible to evade bans by toggling host
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mangling.
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The second form (extban) is ``+b $type`` or ``+b $type:data``. type is a single
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character (case insensitive) indicating the type of match, optionally
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preceded by a tilde (``~``) to negate the comparison. data depends on type.
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Each type is loaded as a module. The available types (if any) are listed
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in the EXTBAN token of the 005 (``RPL_ISUPPORT``) numeric. See
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``doc/extban.txt`` in the source distribution for more information.
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If no parameter is given, the list of bans is returned. All users can
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use this form. The plus sign should also be omitted.
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Matching users will not be allowed to join the channel or knock on it.
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If they are already on the channel, they may not send to it or change
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their nick.
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``+c``, colour filter
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---------------------
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This cmode activates the colour filter for the channel. This filters out
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bold, underline, reverse video, beeps, mIRC colour codes, and ANSI
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escapes. Note that escape sequences will usually leave cruft sent to the
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channel, just without the escape characters themselves.
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``+e``, ban exemption
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---------------------
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This mode takes one parameter of the same form as bans, which overrides
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``+b`` and ``+q`` bans for all clients it matches.
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This can be useful if it is necessary to ban an entire ISP due to
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persistent abuse, but some users from that ISP should still be allowed
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in. For example: ``/mode #channel +be *!*@*.example.com *!*someuser@host3.example.com``
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Only channel operators can see ``+e`` changes or request the list.
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``+f``, channel forwarding
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--------------------------
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This mode takes one parameter, the name of a channel (``+f #channel``). If
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the channel also has the ``+i`` cmode set, and somebody attempts to join
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without either being expliticly invited, or having an invex (``+I``), then
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they will instead join the channel named in the mode parameter. The
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client will also be sent a 470 numeric giving the original and target
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channels.
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Users are similarly forwarded if the ``+j`` cmode is set and their attempt
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to join is throttled, if ``+l`` is set and there are already too many users
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in the channel or if ``+r`` is set and they are not identified.
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Forwards may only be set to ``+F`` channels, or to channels the setter has
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ops in.
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Without parameter (``/mode #channel f`` or ``/mode #channel +f``) the forward
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channel is returned. This form also works off channel.
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``+F``, allow anybody to forward to this
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----------------------------------------
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When this mode is set, anybody may set a forward from a channel they
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have ops in to this channel. Otherwise they have to have ops in this
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channel.
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``+g``, allow anybody to invite
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-------------------------------
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When this mode is set, anybody may use the INVITE command on the channel
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in question. When it is unset, only channel operators may use the INVITE
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command.
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When this mode is set together with ``+i``, ``+j``, ``+l`` or ``+r``, all channel
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members can influence who can join.
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``+i``, invite only
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-------------------
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When this cmode is set, no client can join the channel unless they have
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an invex (``+I``) or are invited with the INVITE command.
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``+I``, invite exception (invex)
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--------------------------------
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This mode takes one parameter of the same form as bans. Matching clients
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do not need to be invited to join the channel when it is invite-only
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(``+i``). Unlike the INVITE command, this does not override ``+j``, ``+l`` and ``+r``.
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Only channel operators can see ``+I`` changes or request the list.
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``+j``, join throttling
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-----------------------
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This mode takes one parameter of the form n:t, where n and t are
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positive integers. Only n users may join in each period of t seconds.
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Invited users can join regardless of ``+j``, but are counted as normal.
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Due to propagation delays between servers, more users may be able to
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join (by racing for the last slot on each server).
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``+k``, key (channel password)
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------------------------------
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Taking one parameter, when set, this mode requires a user to supply the
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key in order to join the channel: /JOIN #channel key.
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``+l``, channel member limit
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----------------------------
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Takes one numeric parameter, the number of users which are allowed to be
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in the channel before further joins are blocked. Invited users may join
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regardless.
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Due to propagation delays between servers, more users may be able to
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join (by racing for the last slot on each server).
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``+L``, large ban list
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----------------------
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Channels with this mode will be allowed larger banlists (by default, 500
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instead of 50 entries for ``+b``, ``+q``, ``+e`` and ``+I`` together). Only network
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operators with resv privilege may set this mode.
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``+m``, moderated
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-----------------
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When a channel is set ``+m``, only users with ``+o`` or ``+v`` on the channel can
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send to it.
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Users can still knock on the channel or change their nick.
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``+n``, no external messages
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----------------------------
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When set, this mode prevents users from sending to the channel without
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being in it themselves. This is recommended.
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``+o``, channel operator
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------------------------
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This mode takes one parameter, a nick, and grants or removes channel
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operator privilege to that user. Channel operators have full control
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over the channel, having the ability to set all channel modes except ``+L``
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and ``+P``, and kick users. Like voiced users, channel operators can always
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send to the channel, overriding ``+b``, ``+m`` and ``+q`` modes and the per-channel
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flood limit. In most clients channel operators are marked with an '@'
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sign.
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The privilege is lost if the user leaves the channel or server in any
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way.
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Most networks will run channel registration services (e.g. ChanServ)
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which ensure the founder (and users designated by the founder) can
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always gain channel operator privileges and provide some features to
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manage the channel.
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``+p``, paranoid channel
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------------------------
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When set, the KNOCK command cannot be used on the channel to request an
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invite, and users will not be shown the channel in WHOIS replies unless
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they are on it. Unlike in traditional IRC, ``+p`` and ``+s`` can be set
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together.
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``+P``, permanent channel
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-------------------------
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Channels with this mode (which is accessible only to network operators
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with resv privilege) set will not be destroyed when the last user
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leaves.
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This makes it less likely modes, bans and the topic will be lost and
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makes it harder to abuse network splits, but also causes more unwanted
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restoring of old modes, bans and topics after long splits.
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``+q``, quiet
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-------------
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This mode behaves exactly like ``+b`` (ban), except that the user may still
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join the channel. The net effect is that they cannot knock on the
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channel, send to the channel or change their nick while on channel.
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``+Q``, block forwarded users
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-----------------------------
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Channels with this mode set are not valid targets for forwarding. Any
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attempt to forward to this channel will be ignored, and the user will be
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handled as if the attempt was never made (by sending them the relevant
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error message).
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This does not affect the ability to set ``+f``.
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``+r``, block unidentified
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--------------------------
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When set, this mode prevents unidentified users from joining. Invited
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users can still join.
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``+s``, secret channel
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----------------------
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When set, this mode prevents the channel from appearing in the output of
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the LIST, WHO and WHOIS command by users who are not on it. Also, the
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server will refuse to answer WHO, NAMES, TOPIC and LIST queries from
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users not on the channel.
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``+t``, topic limit
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-------------------
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When set, this mode prevents users who are not channel operators from
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changing the topic.
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``+v``, voice
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-------------
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This mode takes one parameter, a nick, and grants or removes voice
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privilege to that user. Voiced users can always send to the channel,
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overriding ``+b``, ``+m`` and ``+q`` modes and the per-channel flood limit. In most
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clients voiced users are marked with a plus sign.
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The privilege is lost if the user leaves the channel or server in any
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way.
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``+z``, reduced moderation
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--------------------------
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When ``+z`` is set, the effects of ``+m``, ``+b`` and ``+q`` are relaxed. For each
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message, if that message would normally be blocked by one of these
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modes, it is instead sent to all channel operators. This is intended for
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use in moderated debates.
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Note that ``+n`` is unaffected by this. To silence a given user completely,
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remove them from the channel.
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