udp 1.0.1

A starting point for Dart libraries or applications.

example/udp_example.dart

/*
 *
 *  Copyright 2019 Kennedy Tochukwu Ekeoha 
 *  
 *  Redistribution and use in source and binary forms, with or without 
 *  modification, are permitted provided that the following conditions 
 *  are met: 
 *  
 *  1. Redistributions of source code must retain the above copyright 
 *  notice, this list of conditions and the following disclaimer. 
 *  
 *  2. Redistributions in binary form must reproduce the above copyright 
 *  notice, this list of conditions and the following disclaimer in the 
 *  documentation and/or other materials provided with the distribution. 
 *  
 *  3. Neither the name of the copyright holder nor the names of its 
 *  contributors may be used to endorse or promote products derived from 
 *  this software without specific prior written permission. 
 *  
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
 *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
 *  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 
 *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
 *  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
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 *  WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 *  POSSIBILITY OF SUCH DAMAGE.
 *  
 */

import 'package:udp/udp.dart';
import 'dart:io';

main() async {
  // creates a UDP instance and binds it to the local address and the port 42.
  var sender = await UDP.bind(Endpoint.loopback(port: Port(42)));

  // send a simple string to a broadcast endpoint on port 21.
  var dataLength =
      sender.send("Hello World!".codeUnits, Endpoint.broadcast(port: Port(21)));

  stdout.write("${dataLength} bytes sent.");

  // creates a new UDP instance and binds it to the local address and the port
  // 39.
  var receiver = await UDP.bind(Endpoint.loopback(port: Port(39)));

  // receiving\listening
  await receiver.listen((datagram) {
    var str = String.fromCharCodes(datagram.data);
    stdout.write(str);
  }, Duration(seconds: 20));

  // close the UDP instances and their sockets.
  sender.close();
  receiver.close();
}