Safe Channels

RFC 2811: Internet Relay Chat: Channel management
3.2 Safe Channels


   Unlike other channels, "safe channels" are not implicitly created.  A
   user wishing to create such a channel MUST request the creation by
   sending a special JOIN command to the server in which the channel
   identifier (then unknown) is replaced by the character '!'.  The
   creation process for this type of channel is strictly controlled.
   The user only chooses part of the channel name (known as the channel
   "short name"), the server automatically prepends the user provided
   name with a channel identifier consisting of five (5) characters.
   The channel name resulting from the combination of these two elements
   is unique, making the channel safe from abuses based on network
   splits.

   The user who creates such a channel automatically becomes "channel
   creator".  See section 2.4.2 (Channel Creator) for more details on
   this title.

   A server MUST NOT allow the creation of a new channel if another
   channel with the same short name exists; or if another channel with
   the same short name existed recently AND any of its member(s) left
   because of a network split.  Such channel ceases to exist after last
   user leaves AND no other member recently left the channel because of
   a network split.

   Unlike the mechanism described in section 5.2.2 (Channel Delay), in
   this case, channel names do not become unavailable: these channels
   may continue to exist after the last user left.  Only the user
   creating the channel becomes "channel creator", users joining an
   existing empty channel do not automatically become "channel creator"
   nor "channel operator".
   To ensure the uniqueness of the channel names, the channel identifier
   created by the server MUST follow specific rules.  For more details
   on this, see section 5.2.1 (Channel Identifier).




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3.2 Safe Channels

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