The backbone of Exam 06 is the select() system call. In a traditional networking application, reading from a socket blocks the program until data arrives. If your program blocks on Client A, Client B will be completely ignored.
Understand how to manage fd_set and use FD_ZERO , FD_SET , FD_ISSET . 2. Practice String Manipulation in C You will likely deal with parsing input from a client. 42 Exam 06
Set socket options ( SO_REUSEADDR ) to avoid "address already in use" errors during testing. The backbone of Exam 06 is the select() system call
You are restricted to a specific set of system calls. Using unapproved functions results in an immediate failure. The allowed functions typically include: write , close , select socket , accept , listen , bind recv , send 2. Non-Blocking I/O Multiplexing Understand how to manage fd_set and use FD_ZERO
: When a client sends text, the server must format the message as client [ID]: [message] and broadcast it to every other connected client.
Handling partial reads and writes—a common pitfall where messages are cut off or merged due to the streaming nature of TCP. The Logical Challenge: The Mini-IRC Protocol
The engine of Exam 06 handles network multiplexing without blocking.