TCP Lightweight Agent Project Goal : Implementation of a generic agent that will be able to measure connection parameters between a client and a server. Environment : Over the web. Language : Java. Authors : Alon Golan. Robert Parham. Eyal Keren. Regev Smadar.

TCP Lightweight Agent Project The application is running on the server. The application reads the test names from the input file. Inserts the suitable tests to the Tests class and waits for Agent to connect. server

TCP Lightweight Agent Project A client connects to the server over the web. The server thread runs the server tests. server client The socket is accepted, and a server thread is started by a time out thread.

TCP Lightweight Agent Project The server thread starts the client helpers threads on the server. The server thread sends the Tests class to the client (by serialization). server client Tests The server thread initializes the client tests.

TCP Lightweight Agent Project The applet runs the client’s tests. Some of them connect with the suitable helpers on the server. The client sends the results to the server. server client results

TCP Lightweight Agent Project The server thread gets the results and writes them to the HTML output file. The applet exits. server client results

TCP Lightweight Agent Project Till this point we explained the “frame program” implementation. The following part will introduce the tests we have implemented. Server client Agent

TCP Lightweight Agent Project The tests : The interface of the tests - "TestInterface" All our tests implement this interface. This interface defines the methods every test should have- since tests can be added dynamically, they have to conform with this interface, so they will fit the frame program. The interface of the helpers - "HelperInterface" All our helpers implement this interface. This interface defines the methods every helper should have- since tests can be added dynamically, we want their helpers to conform with this interface, so they will fit the frame program.

TCP Lightweight Agent Project Server Test : Sending a Ping - “PingTest” server client This test counts the roundtrip time of an echo message in the IP level to a specific client. This test does not need a helper. ping

TCP Lightweight Agent Project Server Test : Router tracing- "TraceRtTest" server client tracert This test returns the routers used when connecting the server to a specific client. This test does not need a helper.

TCP Lightweight Agent Project Client Test : TCP throughput Test- "TcpThroughputTest" server client Sending bytes This test calculates the throughput of a TCP connection, it simulates reading files with different sizes. This test needs a helper. After the server-client connection was established the server (helper) starts sending bytes to the client (test). The client reads the bytes the server sends. The results of the test are the throughput (time/size) for reading different amounts of bytes. connect

TCP Lightweight Agent Project Client Test : Roundtrip time test- "RttTest" server client Send byte This test calculates the roundtrip time of a TCP connection. This test needs a helper. The client sends a byte to the server. When the server gets this byte, it answers right back with a byte. This process will repeat several times, and the result will be the average time. Send byte

TCP Lightweight Agent Project Client Test : HTTP 1.0 test- "HTTPThrTest10" server client download Calculates the throughput of the download time of a HTML file, using the HTTP 1.0 protocol. HTML file with images or without. This test does not need a helper. GET HTTP/1.0 download

TCP Lightweight Agent Project Client Test : HTTP 1.1 test- "HTTPThrTest11" server client download Calculates the throughput of the download time of a HTML file, using the HTTP 1.1 protocol. HTML file with images. This test does not need a helper. GET HTTP/1.1 download

TCP Lightweight Agent Project Client Test : Time test- "TimeTest" server client acknowledge This test checks the time it takes the network to do the "three way handshake" process and the time it takes the network make the domain name translation. This test does not need a helper. The results are the three way handshake time, and the name resolution time. connect acknowledge

TCP Lightweight Agent Project Client Test : UDP test- "UDPTest" server client UDP packets The client sends a TCP message to the server. The server sends back several UDP packets and a TCP message to the client with the number of UDP packets sent. This test calculates loss rate of UDP packets sent between a server and a client. This test needs a helper. TCP connect TCP message

TCP Lightweight Agent Project The End