A mini TCP server implemented in OCaml.

A port of Implementing a TCP server in C in OCaml for the purpose of learning OCaml, Jane's Core library, and networking abstractions. The implementation closely matches the one in C. A better, non-blocking approach would be using more idiomatic OCaml patterns and libraries such as Async.

The code is overly documented and has verbose variable names to remind me the concepts when I forget them.

• OCaml effectful code.
• OCaml build tool (dune).
• Core_unix API in Core__.
• High level understanding of socket, socket states, and connection queues.

To run the TCP server, in terminal 1:

# build.
$ dune build server.exe
# run.
$ dune exec ./server.exe

Open terminal 2 to act as a client:

# communicate to TCP server using TELNET protocol.
$ telnet 0.0.0.0 8080

Terminal 1 should print out client address and port and immediately attempt to close the connection.

$ dune exec ./server.exe
Client connected @ 127.0.0.1 port 57350
Closing connection...