TCP Simulation using UDP

TCP is mimicked using UDP.

Author

POSERIO, CLINTON E. | 2012-27803 | CMSC137 B-1L

Specifications

The simulation should implement: [1] UDP message body that includes headers that are lacking from TCP. - Sequence/Synchronization Number - Acknowledgement Number - Acknowledgement Bit - Synchronization Bit - Finish Bit - Window Size [2] threeway handshake connection [3] timeout and resend of TCP packet [4] window sliding mechanism on both source and destination [5] acknowledgement of fully received packets [6] correct use of synchronization numbers and acknowledgement numbers [7] fourway handshake disconnection [8] Also the following: a.) To mimick dropping of packets, it should randomly drop packets given variable of 0%, 25%, 50%, and 75%. b.) Both client and server should have different port numbers but should work on IP address: 127.0.0.1 c.) To mimick latency, Both server and client should only show results of receiving packets after 2 seconds delay. d.) Network timeout and resending should be pegged on 4 seconds. e.) Waiting time after disconnection should be pegged at 10 seconds. f.) It should show that both client and server has already disconnected after 10 seconds.

Compile

On the terminal, enter 'javac *.java'

Run Server

Enter 'java Server ' (NOTE: Only port 80 or 8080 works here on cloud9. idky :( )

Run Client

Enter 'java Client ' (NOTE: Only port 80 or 8080 works here on cloud9. idky :( )