Named Data Networking (NDN) in Dart

dart_ndn is a basic Named Data Networking (NDN) implementation that can be used in Dart and Flutter projects. It follows Version 0.3 of the NDN Packet Specification, and implements the link protocol NDNLPv2 as well as the NFD Management Protocol to be able to interact with an NDN Forwarding Daemon (NFD).

Features

The main features include support for Faces based on Unix and TCP sockets as well as a Consumer and Producer implementation.

Getting started

In order to use the package, you should have a local NFD installed. On unix-like systems, you can follow these installation instructions. On Android, you can install an NFD port from the Google PlayStore.

Having an NFD installed, you can then interact with it using Unix or TCP sockets. In theory, however, you could also have an NFD running on a different host and connect via TCP, which might be useful for some testing scenarios.

Usage

A minimal example with a consumer that connects to an NFD via a Unix socket can be found below.

import "package:convert/convert.dart";
import "package:dart_ndn/dart_ndn.dart";

Future<void> main() async {
  final consumer = await Consumer.create();

  final result = await consumer.expressInterest(Name.fromString("/foo/bar"));

  switch (result) {
    case NackReceived():
      print("Received NACK");
    case InterestTimedOut():
      print("Interest timed out");
    case DataReceived():
      print("Received Data Packet");
      final content = result.data.content;
      print(content);

      if (content != null) {
        print("Content: ${hex.encode(content)}");
      }
  }

  await consumer.shutdown();
}

Additional examples can be found in the example directory.

License

dart_ndn is licensed under the 3-Clause BSD License. See the LICENSE file for more information.

SPDX-License-Identifier: BSD-3-Clause