I recall - ages ago - that we were going to, at one point, mention
that if you change your nickname, you should send unavailable
persence after the change to the old nick:
C: <presence to='room@service/new_nick'/>
S: <presence from='room@service/old_nick'
type='unavailable'>...110/303...</presence>
S: <presence from='room@service/new_nick'/>
C: <presence to='room@service/old_nick' type='unavailable'/>
The problem being that currently, the server must track directed
presence, and so if you change your nickname, the server keeps
tracking the old nickname too - and will eventually have to send an
unavailable anyway.
In addition, there's a small possibility that this could be used by
unscrupulous rooms as a presence leak, by both the unavailable
presence to the old nick and by using the response to probes
(potentially).
Dave.
--
Dave Cridland - mailto:[email protected] - xmpp:[email protected]
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