CTCP Version 1

Klaus Zeuge Troy Rollo Ben Mesander May 1993

The Client-To-Client Protocol (CTCP)
Version One

CTCP LEVEL QUOTING

In order to be able to send the delimiter X-DELIM inside an extended data message, it has to be quoted. This introduces another quote character (which differs from the low level quote character so it won't have to be quoted yet again).

	X-QUOTE	::=	'\134'

        (a back slash - `\').

When quoting on the CTCP level, only the actual CTCP message (extended data, queries, replies) are quoted. This enables users to actually send X-QUOTE characters at will. The following translations should be used:

	X-DELIM	--> X-QUOTE 'a'
	X-QUOTE	--> X-QUOTE X-QUOTE

and when dequoting on the CTCP level, only CTCP messages are dequoted whereby the following table is used.

	X-QUOTE 'a'	--> X-DELIM
	X-QUOTE X-QUOTE	--> X-QUOTE

If an X-QUOTE is seen with a character following it other than the ones above, that is an error and the X-QUOTE character should be dropped. For example the CTCP-quoted string 'x' X-QUOTE 'y' 'z' becomes after dequoting, the three character string 'x' 'y' 'z'.

If a X-DELIM is found outside a CTCP message, the message will contain the X-DELIM. (This should only happen with the last X-DELIM when there are an odd number of X-DELIM's in a middle level message.)

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