FOSDEM: Session Mobiliy using XMPP

ROLE

LAYERS

Session Mobility
using XMPP

FOSDEM 2013 – XMPP DevRoom, 2012-02-02
István Koren
RWTH Aachen University
Advanced Community Information Systems (ACIS)
Lehrstuhl Informatik 5
koren@dbis.rwth-aachen.de
(Information Systems)
Prof. Dr. M. Jarke
I5-FL-0213-1 This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

ROLE
Session Mobility?
LAYERS  Refers to…
– IP mobility protocols
– multimedia session mobility
– application migration

 SIP
– REFER fig.1: SIP REFER

– RFC 5631
 this talk is about Session Mobility for
Prof. Dr. M. Jarke
Collaborative Pervasive Apps!
I5-FL-0213-2

ROLE
Session Mobility!
LAYERS  Session Transfer

 Session Split

Prof. Dr. M. Jarke
I5-FL-0213-3

ROLE
Session Mobility in the wild…
LAYERS

fig.1: Deep Shot © Google

fig.2: Cisco WebEx © Cisco
Prof. Dr. M. Jarke
I5-FL-0213-4

ROLE
Device Discovery
Personal Device


LAYERS  <iq from="alice@mobilis.inf.tu-dresden.de/desktop"
to="alice@mobilis.inf.tu-dresden.de" type="get" id="1">
<query xmlns="http://jabber.org/protocol/disco#items">
</query>
</iq>



Resources! <iq type="result" from="alice@mobilis.inf.tu-dresden.de"
to="alice@mobilis.inf.tu-dresden.de/desktop" id="123">
<query xmlns="http://jabber.org/protocol/disco#items">
<item jid="alice@mobilis.inf.tu-dresden.de/desktop"/>
<item jid="alice@mobilis.inf.tu-dresden.de/phone"/>
<item jid="alice@mobilis.inf.tu-dresden.de/tablet"/>
</query>
</iq>

lst.1: Querying own resources

 QR codes, NFC

Prof. Dr. M. Jarke
I5-FL-0213-5

ROLE
Public Device – Kiosk
LAYERS  standalone device
 XMPP daemon
 as personal device
 remote login mechanism

fig.3: Kiosk Device

fig.4: Remote Login
Prof. Dr. M. Jarke
I5-FL-0213-6

ROLE
OAuth & XMPP
LAYERS  XEP-0235: OAuth Over XMPP? deferred
 the Google Talk & Windows Live Messenger way…
<auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl"
mechanism="X-OAUTH2"
auth:service="oauth2"
xmlns:auth="http://www.google.com/talk/protocol/auth">
base64("0" + user_name + "0" + oauth_token)
</auth>

lst.2: OAuth @ Google Talk

<auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl"
mechanism="X-MESSENGER-OAUTH2">
ACCESS_TOKEN
</auth>

lst.3: OAuth @ Windows Live Messenger

 integrate browser-based authentication?
Prof. Dr. M. Jarke
I5-FL-0213-7

ROLE
ad hoc Discovery
LAYERS  XEP-0174: Serverless Messaging
jid=lightsensor@xmpp.org
port.p2pj=5562
status=avail

lst.4: Advertising Presence via mDNS

fig.5: mDNS Service Discovery

(Information Systems) fig.6: ad-hoc Light Switch
Prof. Dr. M. Jarke
I5-FL-0213-8

ROLE
Session Transfer
LAYERS  two general approaches
– packet logging and replay
– application specific bundling
<iq from="alice@example.org/mobile“
to="alice@example.org/tablet“
type="get" id="234">
<query xmlns="mobilis:iq:sessionmobility#sessiontransfer">
<mechanisms xmlns="mobilis:params:sessiontransfer“>
<mechanism>INBAND-XMPP</mechanism>
<mechanism >FILES </mechanism >
<mechanism>BUNDLE-COMPRESSED-ZIP</mechanism>
</mechanisms>
</query>
</iq>

lst.5: Offering Session Transfer Mechanisms

Prof. Dr. M. Jarke
I5-FL-0213-9

ROLE
Session Split / Synchronizing
LAYERS  packet sent to bare JID: delivery depends on server
implementation…
 XEP-0280: Message Carbons experimental
– forwarding in- and outbond messages to other resources
Case A: Case B:
Juliet sends Message to romeo@example.net: Juliet sends Message to romeo@example.net/home:

Message is forked and sent to: Message is sent to:
romeo@example.net/home romeo@example.net/home
romeo@example.net/garden …and forwarded to:
romeo@example.net/garden
Prof. Dr. M. Jarke
I5-FL-0213-10

ROLE
Packet Filtering
LAYERS  intelligent packet routing
 defined by endpoint

fig.7: communication footprint of a LBG

 XEP-0273: Stanza Interception and Filtering
Technology (SIFT) deferred
– Stanza
– Sender/Recipient
– Payload
Prof. Dr. M. Jarke
I5-FL-0213-11

ROLE
Conclusion
LAYERS  Problems
– extension implementation & deferrals & experimentals
– OAuth
 ad-hoc
– session transfer over local link
– towards IoT
 state transfer using publish-subscribe
– as a more general approach
 more evaluation needed…
Prof. Dr. M. Jarke
I5-FL-0213-12

ROLE
XMPP @ our chair
LAYERS  ROLE project
– Interwidget Communication with XMPP (see DevRoom
talk last year…)
– XMPP over Websockets (not BOSH)

 Teaching: Web Science lecture

 Bachelor & Master theses…

Prof. Dr. M. Jarke
I5-FL-0213-13
 new projects

ROLE
Mobilis Framework
LAYERS

…for more information please check:
(Information Systems) http://mobilis.inf.tu-dresden.de
Prof. Dr. M. Jarke
I5-FL-0213-14

ROLE
Thank you!
LAYERS  Contact me:
xmpp://koren@role.dbis.rwth-aachen.de
koren@dbis.rwth-aachen.de
http://www.istvank.eu

 Check out ROLE SDK of RWTH
http://sourceforge.net/projects/role-project

 Check out the Mobilis framework of TU Dresden
Prof. Dr. M. Jarke
I5-FL-0213-15
https://github.com/danielschuster/mobilis

ROLE
Crazy Stuff with XMPP (or webinos)
LAYERS

Prof. Dr. M. Jarke
I5-FL-0213-16

ROLE
References
LAYERS
http://tools.ietf.org/html/rfc5631
https://developers.google.com/talk/jep_extensions/oauth
http://msdn.microsoft.com/library/live/hh826554

http://xmpp.org/extensions/xep-0235.html

Prof. Dr. M. Jarke
I5-FL-0213-17

ROLE
fin
LAYERS

Prof. Dr. M. Jarke
I5-FL-0213-18

FOSDEM: Session Mobiliy using XMPP

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