NS3 - Direct Code Execution (DCE)

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ztguang_张同光 2022-04-25 16:22:27

This is the manual of Direct Code Execution (DCE).

Doxygen: Documentation of the public APIs of the DCE
Manual(this document)for the latest release and development tree

This document is written in reStructuredText for Sphinx and is maintained in thedoc/ directory of ns-3-dce’s source code.

Introduction
Quick Start
User’s Guide
Developer’s Guide
How It Works
Subprojects of DCE
About

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Introduction

Overview

Direct Code Execution (DCE) is a module for ns-3 that provides facilities to execute, within ns-3, existing implementations of userspace and kernelspace network protocols or applications without source code changes. For example instead of using the pseudo application provided by ns-3 V4PingHelper you can use the true ping.

Manual Structure

This document consists of the following parts:

Quick Start: The document describes a quick instruction of DCE.
User’s Guide: The document is for people who will use DCE to experiment.

DCE Outlook

To run an application using DCE, it isnotnecessary to changeits sources. However you will need torecompilethem.
The simulation is executed wholly within asingle processwhich greatly facilitates thedebugging.
DCE is verymemory-efficient, thanks to the way it loads the executables similarly to shared libraries.

Supported Features

Simulation with POSIX socket application (no manual modifications)
C/C++ applications
Simulation with Linux kernel implemented network protocol

IPv4/IPv6
TCP/UDP/DCCP
running with POSIX socket applications and ns-3 socket applications
configuration via sysctl-like interface
multiple nodes debugging with single gdb interface
memory analysis by single valgrind execution with multiple nodes