rawlink

Portable library to read and write raw packets
README

Rawlink is an ocaml library for sending and receiving raw packets at the link
layer level. Sometimes you need to have full control of the packet, including
building the full ethernet frame.

The API is platform independent, it uses BPF on real UNIXes and AF_SOCKET on
linux. Some functionality is sacrificed so that the API is portable enough.

Currently BPF and AF_PACKET are implemented, including filtering capabilities.
Writing a BPF program is a pain in the ass, so no facilities are provided for
it. If you need a BPF filter, I suggest you write a small .c file with a
function that returns the BPF program as a string, check rawlink_stubs.c for
an example.

Both normal blocking functions as well as Lwt monadic variants are provided.

A typical code for receiving all packets and just sending them back on an
specified interface are detailed below:

let link = Rawlink.open_link "eth0" in
let buf = Rawlink.read_packet link in
Printf.printf "got a packet with %d bytes.\n%!" (Cstruct.len buf);
Rawlink.send_packet link buf

Check the mli interface for more options.

Install
Published
15 Apr 2022
Sources
rawlink-1.2.tbz
sha256=a712be95f636466536327fd92ce476fb72a4e06e1b82a85d5b471db8289a91e4
sha512=006a1d57b6e3093c929d0c1d3a53075059d0a35196eebb0b2f444aab3c7492a86befe22de700d40fb479a789470bfe4b1e8b83f02c878cf85b1b5b9d67778aad
Dependencies
cstruct
>= "6.1.0"
lwt
>= "2.4.7"
ocaml
>= "4.03.0"
Reverse Dependencies