Collisions And Channel Modes

RFC 2811: Internet Relay Chat: Channel management

6.3 Collisions And Channel Modes


   The "Internet Relay Chat: Server Protocol" document [IRC-SERVER]
   describes how channel data is exchanged when two servers connect to
   each other.  Channel collisions (either legitimate or not) are
   treated as inclusive events, meaning that the resulting channel has
   for members all the users who are members of the channel on either
   server prior to the connection.

   Similarly, each server sends the channel modes to the other one.
   Therefore, each server also receives these channel modes.  There are
   three types of modes for a given channel: flags, masks, and data.
   The first two types are easy to deal with as they are either set or
   unset.  If such a mode is set on one server, it MUST be set on the
   other server as a result of the connection.
   As topics are not sent as part of this exchange, they are not a
   problem.  However, channel modes 'l' and 'k' are exchanged, and if
   they are set on both servers prior to the connection, there is no
   mechanism to decide which of the two values takes precedence.  It is
   left up to the users to fix the resulting discrepancy.




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6.3 Collisions And Channel Modes

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