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1175ff837d
This change modifies extb_channel to allow matching users in secret channels, which prevents trivial ban evasion by setting the target channel +s. Information leak due to this change is unlikely since the attacker would have to know that the target channel exists, the name of the channel (or guess it), have a specific user they wanted to know whether was in the channel (and not know already), and the target user would need to have something like autojoin-on-invite enabled (or any of the other various ways hostname cloaking is attacked).
31 lines
1.5 KiB
Text
31 lines
1.5 KiB
Text
MODE <channel> <+|-><b|q|e|I> $[~]<type>[:<data>]
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Extended bans (ban conditionals) allow different checks than the usual
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nick!user@host or nick!user@ip match to determine whether someone should
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be banned, quieted, exempted or invited.
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Extended bans are of the form $[~]<type>[:<data>]. The <type> is one
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character (case insensitive) and determines the type of match. Most types
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allow or require an extra field <data>. If the tilde (~) is present, the
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result of the comparison will be negated, unless the ban is invalid in which
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case it will never match. Invalid bans are ones where <data> is missing but
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required or where <data> is otherwise invalid as noted below.
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Unless noted below, all types can be used with +b, +q, +e and +I.
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extb Type - DESCRIPTION
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------------------------------------------------------------------------
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$a - Matches all logged in users
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$a:<mask> - Matches users logged in with a username matching the mask
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(* and ? wildcards)
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$c:<chan> - Matches users who are on the given channel
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$o - Matches opers (most useful with +I)
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$r:<mask> - Matches users with a realname (gecos) matching the mask
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(* and ? wildcards); this can only be used with +b and +q
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$s:<mask> - matches users connected to a server matching the mask
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(* and ? wildcards); this can only be used with +b and +q
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$j:<chan> - matches users who are or are not banned from a specified
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channel
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$x:<mask> - Bans all users with matching nick!user@host#gecos
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$z - Matches all SSL users
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