The document discusses the extensible messaging and presence protocol (XMPP) and its open source instant messaging system called Jabber. It provides an overview of the decentralized infrastructure of Jabber and how it functions like email. It also describes several standards and implementations of Jabber including pubsub for push notifications, the common alerting protocol for emergency alerts, and its use by the US Army. The document encourages coding with Jabber due to its libraries for many languages and open documentation.

1. ?xml version='1.0'?> <stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/stream
Jabber is more than Instant Messaging
O'Reilly EuroOscon
20/09/2006
Florian Holzhauer
jid: fh@jabber.ccc.de
mail: fh-j@fholzhauer.de
EuroOsconk: Jabber – Florian Holzhauer - #1

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Intro
● Jabber / XMPP
● eXtensible Message and Presence Protocol
● JEPs: Jabber Enhancement Proposal
● XEP?
● Jabber is open
● New ideas, anyone?
● xmpp.org
● Jabber.org
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3. ?xml version='1.0'?> <stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/stream
Infrastructure
● Decentralized Dynamical Network
● „like Mail“
● XMPP: RFC 3920-3924
● Several jabberd-implementations
● SRV records
● Lots of clients
● Even for OS/2, Amiga, Symbian and Newton
● Google Talk
● Livejournal
● Mabber
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4. ?xml version='1.0'?> <stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/stream
Server infrastructure
(jabberd14 as example..)
● Jabberd routing
sessions some.jabberd.com
dns
Port 5269
SRV _xmpp-server._tcp.some.jabberd.com
s2s
*@jabber.ccc.de
Gateways
AIM/ICQ/MSN/Yahoo
router
SMS/eMail/IRC/RSS...
transports
c2s
Ports 5222/5223
fh@jabber.ccc.de
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5. ?xml version='1.0'?> <stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/stream
Running a jabberd
● http://www.jabber.org/software/servers.shtml
● Ejabberd - erlang
● Jabberd1.4 – C
● W ildfire – Java
● Several others - some weird, some cool.
● Resource usage?
● Start small, extend later
● Few gateway users == no trouble
● Backend storage
● *sql, ldap, files, berkeley db?
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6. ?xml version='1.0'?> <stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/stream
Pubsub (JEP 0060)
● Push mechanism for any content
● Media provider offers „node“
● You subscribe to the node
● When content changes all subscribers are notified
● Various content possible
● Several Standards
● Atom over Pubsub
● User Mood
● Avatar Picture
● User Tune („Now playing“)
● ...
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Atom over Pubsub
● „RSS over XMPP“
● No repeated polling
● Less traffic
● Instant Notification
● Faster
● Node „sharing“
● Several publishers
● Subscription Management
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Common Alterting Protocol
● JEP 0127
● „to collect and relay all types of hazard warnings
and reports“
● Instant delivery
● Used in the CapWin Project – Maryland, Virginia
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9. ?xml version='1.0'?> <stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/stream
CapWin
● Jabber/Web based system
● „CapWIN is a partnership [..] to develop an
interoperable first responder data communication
and information sharing network“
● 47 agencies, 1754 users
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HTTP Auth via Jabber
● „Single Sign on“
● JEP 0070
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Virtual Presence
● Each user has its avatar
● Customizable
● Animation
● Shown in the browser
● Chatting capabilities
● JEP 0151
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Lluna
● Same Website = Same Interests
● Chat with visitors of the same website
● Privacy: <md5sum-of-website>@conference
● Currently windows only
● Open Source
● Shopping Assistant on Website
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SIP/Simple/Jingle
● SIP/Simple can be replaced using Jabber
● Jabber is more extensible
● One central server
● Logging is easy, and important for financial
companies due to regulations by the Securities
Exchange Commission
● Big installation by Bell South
● Jingle
● VoIP via Jabber
● Google Talk
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HTTP Binding
● JEP 0124
● Jabber over HTTP
● Encapsulated in <body>
● Javascript-based Jabber-Client
● „Web 2.0“
● Mabber
● JWChat
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Server Monitoring
● Nagios supports Jabber
● Jabber ID = machine
● Sputnik – Wlan Access Points
● Accounting
● Administration
● Monitoring
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Support/Knowledge Management
● Find an „expert“ via Jabber
● Implemented by Qunu
● Jabber conferences
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Other ideas
● Multiuser games
● Blogging
● Livejournal has „Jabber support“
● Integration into „Web 2.0“ communities
● ...
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Jabber and the „officials“: US army
● „U.S. Army Future Combat System“
● Developed by Boeing
● „connect people and sensors in real time“
● Chat services provided by jabber
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19. ?xml version='1.0'?> <stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/stream
Coding with jabber?
● Well documented
● Libraries for most common languages
● Perl
● Python
● C++
● Ruby
● Java
● Dylan
● ...
● A lot of sample code online, some nice books
● Please: Not yet another new desktop client.
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20. ?xml version='1.0'?> <stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/stream
Hey, wake up! It's over.
● Slides + Urls:
http://fholzhauer.de/docs/euos2006/
● Any questions?
● Feel free to contact me via jabber:
● fh@jabber.ccc.de
EuroOsconk: Jabber – Florian Holzhauer - #20