Mobile Agents in Click

Tushar Mohan

Click Elements

• Graphs made of simple elements

• Separate flows have separate ports

• Common case fast

• Reduce function calls

• Ports of elements - PUSH, PULL, AGNOSTIC

Advertisements and Registration

H F

M

Router/Agent Advertisement Element

FromDevice ClassifierAgentAdvertisement

EtherEncap

Queue

ToDevice

Home/Foreign Agent Element

FromDeviceeth0 Classifier ARPResponder

Agent

ToDeviceeth1

IP

Strip

LookUpIPRoute

FromDeviceeth1

To Classifier

0 0

1 12

Home Agent Configuration• Input 0 :

• Normal IP + IP for forwarding + UDP registration requests

• Input 1 :• Agent Interface Ethernet packets for which we

Proxy/Gratuitous ARP• Possible de-registration request

• Output 0 : • Normal IP + Encapsulated IP

• Output 1 :• Unprocessed Ethernet packets from Agent Interface

• Output 2 :• Proxy/Gratuitous ARPs

Foreign Agent Configuration• Input 0 :

• Normal IP + Encapsulated IPIP + UDP registration replies

• Input 1 :• Registration requests Eth/IP/UDP + Passing ethernet

packets• Output 0 :

• Normal IP + Relayed registration requests• Output 1 :

• Unprocessed Ethernet packets from Agent Interface• Output 2 :

• De-capsulated packets + Relayed replies

Test Configuration

MH

FH

Ex-MH

202.54.15.1

202.54.15.1

202.54.1.1

202.54.15.10

192.168.0.1192.168.10.1

Schematic for agent.click

FH

0(in) (out)0

0(out) 0(in)

1(in)

InfiniteSource

Discard

Print

2(out)

1(out)

Discard

Print

Discard

Discard

2 (out)

1(out)

InfiniteSource

Adv.click

AgentAdvertise( HOME, 192.168.123.116, 224.0.0.1, 0.0.0.0, REG_LIFE=255, MAX=5, ENCAP=GRE, DEFAULT_ROUTER=false, MIN=5 )

->IPPrint("Adv", CONTENTS=hex, ID=true) ->Discard;

What Remains ?

• Not fully compliant (RFC2002)– ARPs, validation, authentication– multiple simultaneous binding

• Speed-up (hash classes)

• Hardware testing

• Documentation

• Integration with the MIT toolkit

Objectives

• Add to the Click tool-kit

• Practically implement a protocol

• Enjoy the project