Re: [jdev] xmppping - simple XEP-0199 pinging script

[Peter Saint-Andre]

Maciek Niedzielski wrote:

Peter Saint-Andre wrote:

See here:

http://www.xmpp.org/internet-drafts/draft-saintandre-rfc3921bis-00.html#rules

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='[EMAIL PROTECTED]/chamber'
    to='[EMAIL PROTECTED]/home'
    id='ping345'
    type='result'>
  <ping xmlns='urn:xmpp:ping'/>
  <error type='cancel'>
    <service-unavailable xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>
  </error>
</iq>

Now 3921bis says:
3. Else if the JID is of the form <[EMAIL PROTECTED]/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.

Peter

--
Peter Saint-Andre
Jabber Software Foundation
http://www.jabber.org/people/stpeter.shtml

That's right, it's impossible to tell the difference. And that's a feature, because we try to discourage directory harvesting attacks.

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