lneto

Userspace networking primitives.

lneto is pronounced "L-net-oh", a.k.a. "El Neto"; a.k.a. "Don Networkio"; a.k.a "Neto, connector of worlds".

Packages

• lneto: Low-level Networking Operations, or "El Neto", the networking package. Zero copy network frame marshalling and unmarshalling.

  • lneto/frames.go: Ethernet, IPv4/IPv6, ARP, TCP, UDP packet marshalling/unmarshalling.

• lneto/tcp: TCP implementation and low level logic.

• lneto/dhcpv4: DHCP version 4 protocol implementation and low level logic.

• lneto/dns: DNS protocol implementation and low level logic.

• lneto/ntp: NTP implementation and low level logic. Includes NTP time primitives manipulation and conversion to Go native types.

• lneto/internal: Lightweight and flexible ring buffer implementation and debugging primitives.

Install

How to install package with newer versions of Go (+1.16):

go mod download github.com/soypat/lneto@latest

Developing (linux)

• tap (linux only, root privilidges required) Program opens a TAP interface and assigns an IP address to it and exposes the interface via a HTTP interface. This program is run with root privilidges to facilitate debugging of lneto since no root privilidges are required to interact with the HTTP interface exposed.

  • POST http://127.0.0.1:7070/send: Receives a POST with request body containing JSON string of data to send over TAP interface. Response contains only status code.
  • GET http://127.0.0.1:7070/recv: Receives a GET request. Response contains a JSON string of oldest unread TAP interface packet. If string is empty then there is no more data to read.

• stack Contains stack implementation which can interact with tap program. No root privilidges required.

  • Can expose a HTTP server.