Design and Implementation of the Connectionless Network Protocol (CLNP) as Loadable Kernel Modules in Linux Kernel 2.6

TL;DR

This paper details the design and implementation of a CLNP network protocol as loadable kernel modules in Linux 2.6, enabling ground-to-ground packet processing for ATN with modular, tested components.

Contribution

It introduces a modular implementation of CLNP in Linux kernel 2.6, covering core packet processing functions based on ISO 8473-1, with successful module loading and testing.

Findings

Modules successfully loaded into Linux kernel 2.6

Implemented core CLNP functions including routing and error detection

Demonstrated modular approach for protocol implementation

Abstract

In this paper, we present an implementation of CLNP ground-to-ground packet processing for ATN in Linux kernel version 2.6. We present the big picture of CLNP packet processing, the details of input, routing, and output processing functions, and the implementation of each function based on ISO 8473-1. The functions implemented in this work are PDU header decomposition, header format analysis, header error detection, error reporting, reassembly, source routing, congestion notification, forwarding, composition, segmentation, and transmit to device functions. Each function is initially implemented and tested as a separated loadable kernel module. These modules are successfully loaded into Linux kernel 2.6.