Claudio Lavecchia

Architecture

Core

Claudio Lavecchia

CORE Module: Implementation

Layer 2 sniffer WLAN card set in promiscuous mode Implemented using pcap libraries

(www.tcpdump.org/pcap.htm) CORE Watchdog

Observes sniffed packets to maintain reputation information

Takes forwarding decisions according to reputation

Claudio Lavecchia

Reputation Buffer

a cb

B=4

Obs(k-3) Obs(k-2) Obs(k-1) Obs(k)

Node a

Node c

Claudio Lavecchia

CORE Module: Example

Node a wants to send a packet to node c

Node a knows route to node c R = <a,b,c>

Claudio Lavecchia

CORE Module: example

If a node cooperates we insert a +1 value in the reputation buffer.

a b c

MACb

Dst HashSrcMACc Hash(pl)

MACa MACb pl

MACb MACc plMACb MACc pl

Expectations tableHash(pl)

At k node b is cooperating Obs (k) = +1

Claudio Lavecchia

CORE Module: Open Issues

Setting up a test environment Compatibility (drivers, WLAN cards,

Linux…) and operability nightmare. Suggestions are welcome!

Integration of CORE in HUT framework Neighbors discovery?

Claudio Lavecchia

Test Environment

Compaq iPaq 3950

•Familiar Linux

•Cisco Aironet 350 (to be confirmed)

•Ad-Hoc Mode

Laptop

•Windows XP

•Dell TrueMobile 1150

•Ethereal

Claudio Lavecchia

CORE Module: To Do

Implementation of functional reputation

Cross layer design Definition of relationship between

middleware and CORE