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C++ Academy · Lesson

Building a TCP Echo Server

Walk through a complete TCP echo server implementation.

Goal

Build a minimal TCP server that accepts a connection, reads bytes, and writes them back. The "Hello World" of network programming.

Server Skeleton

The server flow: create socket, bind, listen, accept, handle. Loop forever.

int srv = socket(AF_INET, SOCK_STREAM, 0);
bind(srv, (sockaddr*)&addr, sizeof(addr));
listen(srv, 10);
while (true) {
    int client = accept(srv, nullptr, nullptr);
    handle(client);
    close(client);
}

All lessons in this course

  1. BSD Sockets API in C++
  2. Building a TCP Echo Server
  3. Asynchronous IO with epoll and kqueue
  4. Using Boost Asio for Modern Async IO
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