[jdev] Re: S2S and SASL

[Peter Saint-Andre]

Vinod Panicker wrote:
> On 7/29/05, Justin Karneges <justin-keyword-jabber.093179 at affinix.com> wrote:
> 
>>On Friday 29 July 2005 01:56 am, Vinod Panicker wrote:
>>
>>>I was stating that the RFC is silent about stanza communications
>>>starting as soon as one connection is successful, before the
>>>complementary connection has been established.
>>
>>Good point, it could be interpretted that you must have both connections
>>established even if you are only sending in one direction.
> 
> 
> Do I need to inform anyone specifically to get this added into the
> next version of the RFC or assume that it would be done?

I maintain a page of notes about potential changes to the XMPP RFCs:

http://www.xmpp.org/xmppbis.html

There is no guarantee that any of those changes will be made when the 
xmppwg at jabber.org list discusses rfc3920bis and rfc3921bis (which it 
won't until I submit the relevant Internet-Drafts, perhaps later this 
year or early next year), since any changes will be the result of list 
consensus rather than executive fiat. However, I will add a link from 
that page to this email thread so that we have a pointer and some 
context for the discussion.

>>>>Failed s2s connections can happen at any time, SASL or not.  I don't
>>>>think a failed inbound s2s connection should have any effect on
>>>>established s2s connections.  So in your example you'd be stuck with a
>>>>one-way channel.
>>>
>>>Any recommendations / standard practices on what to do in case of a
>>>situation like this?
>>
>>Do nothing?  I'm pretty sure that's what all the existing servers do today.
> 
> 
> So can we safely state that if server A needs to send a stanza to
> server B, there is no need for server B to establish a connection to
> server A unless in the case of an error?

Well, in most cases, bidirectional communications are desired, but yes, 
if you just want a uni-directional channel, you would not need to set up 
the return channel.

Peter

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