Simulate Link State Routing Protocol with Java Socket Programming

A pure user-space program which simulates the major functionalities of a routing device running a simplified Link State Routing protocol.

How To Run:

$mvn compile assembly:single
$java -cp target/COMP535-1.0-SNAPSHOT-jar-with-dependencies.jar socs.network.Main conf/router1.conf

Supported Commands:

Command	Description
attach processIP processPort simulatedIP weight	attach the link to the remote router, identified by the given simulated ip; weight is the cost to transmitting data through the link NOTE1: processIP should always be localhost (i.e. 127.0.0.1) since this is a simulation on our own machines. NOTE2: processPort must match the corresponding port as listed in the conf files.
start	Client side: broadcast HELLO to all links through a socket connection, send HELLO packets to all linked routers; waits for response from each link; sets status of the linked router to TWO_WAY and sends another HELLO neighbor relationship is established Server side: waits for packets to arrive receives a HELLO packet and sets router state to INIT returns a HELLO packet to the source IP address neighbor relationship established
neighbors	output the neighbors of the routers
detect simulatedIP	output the shortest path from current router to the target router with their weights
update processIP processPort simulatedIP weight	update the weight between the path from processIP to simulatedIP
connect processIP processPort simulatedIP weight	similar to attach command, but directly trigger the database synchronization without the necessity to run start on the origin router NOTE: destination router must still run start before it can be detected.
disconnect port	remove the link between this router and the remote one which is connected at port
quit	exit the program