udp

Package Overview

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A lightweight and efficient UDP library for Dart, enabling seamless unicast, broadcast, multicast, and loopback communication across platforms. Designed for low-latency networking needs, it provides a simple API to send and receive UDP packets with minimal overhead. Ideal for real-time applications such as gaming, IoT devices, and local network discovery. The library is cross-platform, supporting Android, iOS, macOS, Windows, and Linux, making it versatile for diverse deployment scenarios.

Use cases

Real-time game networking
IoT device communication
Local network discovery
Live audio/video streaming
Peer-to-peer data transfer

Key features

Supports unicast, broadcast, multicast, and loopback
Cross-platform compatibility
Low-latency packet transmission
Simple and intuitive API
Efficient memory usage

Suitable for

Developers building real-time apps
IoT and embedded systems
Network protocol experimentation
Apps requiring fast local communication

Considerations

No built-in reliability or ordering
Requires careful handling of packet loss
Not suitable for guaranteed delivery
Limited error handling
Manual management of connection state

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

Lightweight UDP library for Dart.

Usage

A simple usage example:

import 'package:udp/udp.dart';


main() async {
    // creates a UDP instance and binds it to the first available network
    // interface on port 65000.
    var sender = await UDP.bind(Endpoint.any(port: Port(65000)));
  
    // send a simple string to a broadcast endpoint on port 65001.
    var dataLength = await sender.send("Hello World!".codeUnits,
    Endpoint.broadcast(port: Port(65001)));
  
    stdout.write("$dataLength bytes sent.");
  
    // creates a new UDP instance and binds it to the local address and the port
    // 65002.
    var receiver = await UDP.bind(Endpoint.loopback(port: Port(65002)));
  
    // receiving\listening
    receiver.asStream(timeout: Duration(seconds: 20)).listen((datagram) {
      var str = String.fromCharCodes(datagram.data);
      stdout.write(str);
    });
  
    // close the UDP instances and their sockets.
    sender.close();
    receiver.close();
  
  
   // MULTICAST
    var multicastEndpoint =
        Endpoint.multicast(InternetAddress("239.1.2.3"), port: Port(54321));
  
    var receiver = await UDP.bind(multicastEndpoint);
  
    var sender = await UDP.bind(Endpoint.any());
  
    receiver.asStream().listen((datagram) {
      if (datagram != null) {
        var str = String.fromCharCodes(datagram?.data);
  
        stdout.write(str);
      }
    });
  
    await sender.send("Foo".codeUnits, multicastEndpoint);
  
    await Future.delayed(Duration(seconds:5));
  
    sender.close();
    receiver.close();
  
}

Features and bugs

Please file feature requests and bugs at the issue tracker.

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