Best practices for handling stanzas of unknown type

What are the best practices for handling stanzas with
unknown type
attribute?

I've read through RFCs (and bis) and these only say that
_client_ should
silently ignore it.
And server?

The problem is with <presence
type="invisible"/> specifically.
I've got complaints, that it is leaking users invisible
state when
forwarded without touching.

And what about IQs? Most of them are handled by server?
What should it do when receiving <iq/> of unknown
type? Error? Ignore?


-- 
  /_./o__ Tomasz Sterna
 (/^/(_^^'  Xiaoka.com
._.(_.)_  XMPP: smokuxiaoka.com

On Wed, Sep 26, 2007 at 10:33:57AM +0200, Tomasz Sterna
wrote:
> What are the best practices for handling stanzas with
unknown type
> attribute?

Depends on the stanza.

For message, the RFC says default to "normal".

For presence, there is no default, so probably if the 'type'
is an
unknown value it is better to return an error (solves the
presence
leak). IMHO the error should be <bad-request/>.

For IQ, only the defined values make sense (structured
interaction) so 
here again I think it is proper to return a
<bad-request/> error.

I'll clarify this in rfc3920bis / rfc3921bis.

Peter

-- 
Peter Saint-Andre
https://stpeter.im/

> On Wed, Sep 26, 2007 at 10:33:57AM +0200, Tomasz Sterna
wrote:
>> What are the best practices for handling stanzas
with unknown type
>> attribute?
>
> Depends on the stanza.
>
> For message, the RFC says default to
"normal".
>
> For presence, there is no default, so probably if the
'type' is an
> unknown value it is better to return an error (solves
the presence
> leak). IMHO the error should be <bad-request/>.
>
> For IQ, only the defined values make sense (structured
interaction) so
> here again I think it is proper to return a
<bad-request/> error.
>
> I'll clarify this in rfc3920bis / rfc3921bis.

http://svn.xmpp.org:18080/browse/XMPP/trunk/internet-draft
s/draft-saintandre-rfc3920bis-05.xml?r1=1293&r2=1294


http://svn.xmpp.org:18080/browse/XMPP/trunk/internet-draft
s/draft-saintandre-rfc3921bis-04.xml?r1=1220&r2=1295


/psa