[jdev] xmppping - simple XEP-0199 pinging script
stpeter at jabber.org
Fri Jan 5 12:45:42 CST 2007
Maciek Niedzielski wrote:
> Peter Saint-Andre wrote:
>> See here:
> Hmm... I just noticed something.
> Let's say we're pinging a client which does not support ping namespace:
> Example 9. Ping Not Supported
> <iq from='juliet at capulet.com/chamber'
> to='romeo at montague.net/home'
> <ping xmlns='urn:xmpp:ping'/>
> <error type='cancel'>
> <service-unavailable xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>
> Now 3921bis says:
> 3. Else if the JID is of the form <user at domain/resource> and no
> connected or available resource matches the full JID, the recipient's
> server (...) MUST return a <service-unavailable/> stanza error to the
> sender if it is an IQ stanza
> So the reply above may mean both a pong and a not-pong, and it's
> impossible to tell the difference.
That's right, it's impossible to tell the difference. And that's a
feature, because we try to discourage directory harvesting attacks.
Jabber Software Foundation
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