This assignment is intended to reinforce the principles of the inter-process communication and the
end-to-end argument. It will also make you familiar with Java and its networking API. You have to
develop a simplified version of a ftp program (similar to the one described in the end-to-end argument
paper) using the stream sockets available in java.net package.
The program will consist of a client and a server. The client will need to register itself with the
server for the first time using an user-name and a password. These credentials will be used by the
server to authenticate the client for any further sessions. After the client is authenticated, the server
will accept a request from the client for transferring a file. If the requested file exists then it will be
sent across to the client. The contents of the file will be encrypted, using some simple technique (left
to you to decide), before the transmission. If the requested file does not exist then the server will
indicate an error message and close the socket connection.
The server may exhibit Byzantine behavior (again, you decide how to implement this behavior).
A check should be performed to ensure that the file transfer was successfully completed (i.e., the
contents of the original file and its copy on the server are identical). If the transfer was not successful
then the transferring task should automatically be retried. After 5 retries, a failure message should
be displayed if the transfer is still unsuccessful and the socket connection should close.
Your design should consider the principles of the end-to-end argument. You must explicitly indicate
the design decisions, in a brief report, that you have taken in order to achieve the above mentioned
functionality, that have been influenced by the end-to-end argument. Also, the consequences of these
decisions should be discussed.
Although, the assignment mentions about one client and one server, if you design the server such
that it can accept multiple concurrent requests, using the threads of Java, then you will get an extra
credit worth 15 points. Your program should handle appropriate exceptions. The program must run
on any two machines (server on one machine and client(s) on the other) from the following list:
in-csci-rrpc01.cs.iupui.edu
in-csci-rrpc02.cs.iupui.edu
in-csci-rrpc03.cs.iupui.edu
in-csci-rrpc04.cs.iupui.edu
in-csci-rrpc05.cs.iupui.edu
in-csci-rrpc06.cs.iupui.edu
Provide adequate documentation of your program. Create a makefile for your program. All