Code

TCP utilities

This archive contains various helper functions for both servers and clients (take a look at the header for details). You are welcome to use it in your assignments, but first make sure you understand what happens in there. In other words, keep it someplace and refer to it once you are presented with new TCP-related concepts; the archive may contain examples of use for these concepts. You are not expected to understand all the code at once, concepts shall be introduced as the course progresses.

TCP clients

This archive contains the various functions for TCP clients you have seen already (tcp-utils.h and tcp-utils.cc), and code for a simple client that does roughly the same thing as the parameterized telnet client (client.cc).

TCP servers

You have seen a client, so we now have a server in this archive for a change. Besides the known tcp-utils module (tcp-utils.h and tcp-utils.cc), the archive contains a simple server, which receives lines of text from clients and send them back prefixed by a string. There are in fact three implementations of this server, produced by the following targets in the associated makefile (the default target makes them all):

• iserv is the iterative variant (listens by default on port 9000)
• ciserv is still iterative in nature, but simulates concurrency in its sole thread of execution (listens by default on port 9002)
• cserv is the fully concurrent version (listens by default on port 9001)