TCP Socket Interaction and the Read Operation After a TCP connection is established via the three-way handshake, data transmission begins. For the server, once accept() completes, the socket is ready and the process typically calls read(). This read() call is blocking, meaning the server process wil...
Computer networks enable connectivity across diverse hardware and operating systems. To facilitate reliable data exchange, standardized communication rules—known as network protocols—govern transmission formats, rates, and procedures. Key protocols include IP (Internet Protocol) at the network layer...
TCP provides a reliable, ordered, byte-stream channel between two endpoints. In application code, endpoints are explicitly divided into a client that initiates a connection and a server that listens for and accepts connections. A server must be running before any client can connect. Roles and connec...
TCP Chat over a Local Network Minimal TCP Echo Server (C) #include <arpa/inet.h> #include <errno.h> #include <netinet/in.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> #include <sys/types.h> #include <unistd.h&...
Implementing a client for the FTP control and data channels requires speaking a simple, line-oriented, text protocol over TCP. Commands are ASCII lines terminated by CRLF (\r\n). Replies are lines beginning with a three-digit code followed by text and CRLF. Only the numeric code is needed for flow c...