package rawlink

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Portable library to read and write raw packets.

Install

Dune Dependency

Authors

Maintainers

Sources

rawlink-0.5.tbz
sha256=85d7f1def5f745b8e292fe3b0e3e1ead9081ad82c114777612b635cf6a080677
md5=145158526778fa7110a73c39e738e93e

README.md.html

Rawlink - portable library to read and write raw packets.

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.

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