Overview

Goals

• Learn how basic TCP sockets behave.

• Understand how TLS wraps a TCP connection.

• See simple HTTP and SSH protocol examples.

• Explore native extensions in Python with ctypes and pybind11.

Repository layout

src/
  new_year_2026/
    tcp_tls/
      tcp_server.py
      tcp_client.py
      tls_echo_server.py
      tls_echo_client.py
      mini_tls_server.py
      get_or_post.py
      ssh_minimal_client.py
      cert.pem
      key.pem
    ctypes_shared/
    hello_ext/
docs/
.github/workflows/

Design principles

• Keep demos small and readable.

• Prefer standard library APIs where possible.

• Show practical TLS and native extension usage without heavy frameworks.