DUE DATE: Wednesday, May 15, 2002, at 3:30pm

(no late submissions accepted!)

Summary

This project introduces students to the basics of network programming, different protocols provided by the TCP/IP protocol suite, and to the Berkeley Sockets API.

Your task for this project is to extend the functionality of your previous project by adding network support to your application. In order to do that, you will have to write another separate program, (in addition to the kernel module and the player) which would be the music server. The server would listen for incoming connections, accept them, and play the notes that were sent over the network using the kernel module from the previous project.

You will also have to re-write PlayTune to add network support to it. As such, rather than playing the music on the local computer, it should connect to a specified server, so that the music is played on the remote computer instead. (Assuming that the server is running.)

To make the project more fun, include support for multiple servers in your client program. That is, allow the user to play the same tune on up to four computers at once. (Your client would have to connect to several servers simultaneously.)

Notes

• Make sure your server does not allow playing of two different tunes simultaneous, which would surely result in weird noises coming out of the speaker. (You can try it for fun.) If one tune is playing, and another one comes in, the server should inform the remote client that speaker is currently busy.
• The server should keep a log of clients that connect to it in a log file. Log connection date & time, and client's address & port numbers.
• If the server name is not specified on the command line, the player should attempt to play it on the local machine. Do NOT, however, access the device from your player program; instead, send the request to the local server. (Connect to localhost or 127.0.0.1).
• The song file to play should be specified on the command line.
• If nothing is specified on the command line, your program should play the song specified by the TUNE environment variable.
• Standard project guidelines apply: be neat, write comments, check for errors.
• Turn in your assignment ON TIME. You can submit the project at the time of the final at the latest. Early submissions are encouraged.

Extra Credit

• (15 pts) Allow the user to play a given tune on an arbitrary number of computers at once. (It should be interesting to have all 16 computers in the lab chiming away simultaneously.)

What to turn in

Turn in a printout of your code. Include instructions on running your program. Place your source files in the submit directories for cs235, located under /home/submit/cs235/<username>. You may turn in your source files on a floppy, if you wish.