help/opers/extban

   1 MODE <channel> <+|-><b|q|e|I> $[~]<type>[:<data>]
   2
   3 Extended bans (ban conditionals) allow different checks than the usual
   4 nick!user@host or nick!user@ip match to determine whether someone should
   5 be banned, quieted, exempted or invited.
   6
   7 Extended bans are of the form $[~]<type>[:<data>]. The <type> is one
   8 character (case insensitive) and determines the type of match. Most types
   9 allow or require an extra field <data>. If the tilde (~) is present, the
  10 result of the comparison will be negated, unless the ban is invalid in which
  11 case it will never match. Invalid bans are ones where <data> is missing but
  12 required or where <data> is otherwise invalid as noted below.
  13
  14 Unless noted below, all types can be used with +b, +q, +e and +I.
  15
  16  extb Type  - DESCRIPTION
  17 ------------------------------------------------------------------------
  18      $a     - Matches all logged in users
  19   $a:<mask> - Matches users logged in with a username matching the mask
  20               (* and ? wildcards)
  21   $c:<chan> - Matches users who are on the given channel; this is only
  22               valid if the channel exists and is not +s or +p. (The ops
  23               of the channel the ban is on cannot necessarily see whether
  24               the user is in the target channel, so it should not
  25               influence whether they can join either.)
  26      $o     - Matches opers (most useful with +I)
  27   $r:<mask> - Matches users with a realname (gecos) matching the mask
  28               (* and ? wildcards); this can only be used with +b and +q
  29   $s:<mask> - matches users connected to a server matching the mask
  30               (* and ? wildcards); this can only be used with +b and +q
  31   $j:<chan> - matches users who are or are not banned from a specified
  32               channel
  33   $x:<mask> - Bans all users with matching nick!user@host#gecos
  34      $z     - Matches all SSL users
  35