Implement a Message-Stream Protocol (MSP) that uses the sliding window algorithm, and measure its throughput in the x-kernel. Your implementation of MSP should support a control operation that allows the high-level protocol to set the sending window size, thereby allowing you to test MSP's effectiveness over a range of window sizes. MSP should support multiplexing, but you need only measure one channel at a time. MSP's multiplexing/demultiplexing should be patterned after that used by the example protocol ASP from Chapter 2 of the Peterson/Davie textbook.
MSP will typically be configured on top of IP. However, we also provide two virtual protocols--VDELAY and VDROP--that you should configure between MSP and IP. Protocol VDELAY artificially delays packets (25ms, by default). Configuring MSP on top of VDELAY will allow you to test MSP over a larger delay bandwidth link. Protocol VDROP purposely drops packets. Configuring MSP on top of VDROP will allow you to test MSP's timeout and retransmission mechanism.
Turn in a brief (1-2 page) description of your experiments and a summary of the results, including a performance graph that plots the achievable throughput rate as a function of the sending window size, with and without dropped packets. Also, using the turnin program and the assignment name p2, submit your implementation of MSP, and any test protocol(s) you used.
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