[JDEV] Trepia

[David 'TheRaven' Chisnall]

Apple's Rendevous protocol is an implementation of the drafts from the 
IETF zeroconf working group.  Basically it broadcasts a packet with a 
TTL of 1 (or maybe a slightly higher small number in some envrionments, 
such as corporate networks with small subnets that support routing 
broadcast packets between subnets) and then waits for a response.  This 
kind of functionality could not be implemented within the framework of 
the Jabber protocol, since it is 100% peer-to-peer, but there's no 
reason why clients and servers could not implement the service discovery 
portion (http://www.dns-sd.org/), allowing a client to find a local 
server with which to register, and local clients to add to a roster.

If anyone feels like adding this functionality to their client / server, 
the docs needed are the DNS over IP-multicast internet draft 
(draft-cheshire-dnsext-multicastdns.txt) and the DNS-Based Service 
Discovery draft 
(http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt).  (DNS-Based 
Service Discovery can be used with conventional DNS, but is much less 
useful.)


Justin Karneges wrote:

>Hi all,
>
>I'm sure many of you saw this on slashdot:  http://www.trepia.com/
>
>Looks like an interesting idea, and the client reminds me of Rhymbox, but they 
>don't use Jabber. :P :P :P
>
>And an article for ya:
>http://slate.msn.com/id/2083733/
>
>It seems it suffers from the usual issues that Jabber does: no users, lame 
>client.  Well, at least we are farther along than Trepia.  However, something 
>tells me that with all this recent publicity, Trepia will get a ton of users.
>
>IMO, a superior solution could be made using Jabber.  No need for Trepia to 
>re-invent the IM client wheel again or waste their converts on a dead-end 
>protocol.
>
>We already have extendable presence, vcards, avatars, browsing ..
>
>Btw, is there an open protocol for detecting LAN/Wi-Fi users?  I've heard that 
>Apple's Rendevous can do this, but I don't know anything about it.  Trepia 
>has the ability using a similar tactic, I think.
>
>Anyway, I'd like to see a JEP and related server and client implementations by 
>next week, thank you.
>
>-Justin
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