Hi folks, I have some time at my hands, and with the MIX implementation in recent ejabberds, I thought I’d give it a shot.
However, I’m already running into issues with the join flow. The specification
is inconsistent there between different examples in XEP-0369, between XEP-0369
and XEP-0405, and between different examples in XEP-0405, unfortunately.
Here’s the questions:
1. XEP-0405 was bumped to :pam:1, XEP-0369 was bumped to :core:1, but XEP-0405
still uses :core:0 inside the client-join. Is that intentional?
2. XEP-0369 uses the @id attribute and the @jid attribute on <join/>. The text
only talks about @id, which seems to be a string, while at least one example
in XEP-0369 (in 0.13.0 [2] which still has :core:0, which I have to use for
current PAM apparently) shows @jid which contains the @id from another example
as a substring. ISTM that @id is the intended thing to do given that XEP-0369
has been updated (with the bump to :core:1) to only use @id. Is that correct?
3. The embedding of <{:core:Y}join/> inside <{:pam:X}client-join/> seems
error-prone to me at least specification-wise. We’d have to bump :pam:X to
:pam:X+1 whenever we change anything in :core:Y+1, or we have to keep old
versions of the schema of :core:Y around so that implementors can look at it
easily (the attic is no such place because it’s hard to find the correct
version of a document for a given namespace there).
One way to work around this would be to re-define the <{:pam:X+1}client-
join/> on its own without relying on elements from :core:Y. The user’s server
is then responsible for translating the {:pam:X+1} contents to the correct(!)
version of {:core:Y}. This has the obvious problem that the PAM needs to
discover the correct version of :core:Y to use for the join to the channel.
I’m not really fond of that, but the current state isn’t good either. Anyone
got better ideas?
kind regards,
Jonas
[1]: https://xmpp.org/extensions/attic/xep-0369-0.13.0.html#example-19
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