[jdev] Re: Re: JEP-114 - what is the "component name"?

[Joe Hildebrand]

Keep in mind that all of this is *very* implementation-specific.  It
will depend which server you are using as to what you have to put in
the to address....

On 7/22/05, Gaston Dombiak <gaston at jivesoftware.com> wrote:
> Thanks Ralph your your help. I will have to rethink a couple of things
> now. :)
> 
> Regards,
> 
>   -- Gato
> 
> "Ralph Meijer" <jabber.org at ralphm.ik.nu> wrote in message
> news:<20050722083511.GB96200 at ik.nu>...
> > On Thu, Jul 21, 2005 at 04:50:22PM -0300, Gaston Dombiak wrote:
> > > Hey ralphm,
> > >
> > > My question was/is about the format of the TO attribute when sending
> the
> > > opening stream:stream element. So is it valid to just include the
> subdomain
> > > instead of the subdomain+hostname? There is no description of that
> in the
> > > JEP, just the examples that are using the format subdomain+hostname.
> >
> > Oh. Maybe the text is not clear in this respect. The 'to' attribute
> must
> > contain the address of the component, a FQDN. If the address is DNS
> > resolvable (e.g. 'conference.jabber.org', other servers can send
> > messages to it (via s2s). If you just use 'conference.localhost' or
> > 'conference', this is ok, too, but only local entities (clients or
> other
> > components connected to the same server) can send messages to it,
> > because the address would typically only resolve within the server.
> >
> > For completeness, when a server receives a packet it checks the 'to'
> > address. If it is its own address it will try to handle the packet
> > itself. If it not, it has to route the packet elsewhere. In case of
> > local clients, it will try to send the packet on to a connected client
> > or handle it itself. If the address (or the host part of it) is of a
> > locally known component it will route it there. As a last resort, it
> > will try to resolve the address using DNS and open a s2s connection to
> > the found IP-address/port.
> >
> > > Your post made me have more questions now. :) So is it valid to send
> 
> > > subdomain+anyhostname to a server whose hostname is not anyhostname?
> Where
> > > can I read about the implications of doing something like that? How
> may a
> > > server differentiate between subdomain and subdomain+anyhostname? Do
> they
> > > have different implications?
> >
> > Yes, the address is completely free. However, when an other server
> needs
> > to send messages to your component, the FQDN of the component should
> > resolve to the server it is connected to, since this other server will
> > simply open a s2s connection to the given address. Your server is then
> > responsible for answering on behalf of the component. This is because
> > servers cannot know beforehand if a certain address points to a
> 'normal'
> > server or a server component.
> >
> > --
> > Groetjes,
> >
> > ralphm
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-- 
Joe Hildebrand