package mnet

mnet, a pure OCaml TCP/IP stack for unikernels

mnet is a library that implements certain network layers to provide a TCP/IP stack for an application using utcp. The project essentially requires the reading and writing of Ethernet frames, which is provided by Solo5 and mkernel.

This library implements:

• an IPv4 layer (with ARP)
• an IPv6 layer
• an ICMP layer
• the DNS protocol using mnet-dns
• the TLS protocol using mnet-tls
• the SSH protocol using mnet-ssh
• a DHCP layer using mnet-dhcp

The aim is to provide a ready-to-use TCP/IP stack implemented entirely in OCaml. Here is an example of how to initialise a TCP/IP stack that configures itself automatically based on an available DHCP server.

let ( let@ ) finally fn = Fun.protect ~finally fn
module RNG = Mirage_crypto_rng.Fortuna

let rng () = Mirage_crypto_rng_mkernel.initialize (module RNG)
let rng = Mkernel.map rng Mkernel.[]
let cfg = Mnet_dhcp.accept_all

let () =
  Mkernel.(run [ rng; Mnet_dhcp.stack ~name:"service" cfg ])
  @@ fun rng (stack, tcp, udp, lease) () ->
  let@ () = fun () -> Mnet_dhcp.kill stack in
  let@ () = fun () -> Mirage_crypto_rng_mkernel.kill rng in
  ...

mnet is a replacement for mirage-tcpip, designed to take advantage of effects and our Miou scheduler.