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127 lines (109 loc) · 3.87 KB
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using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Threading.Tasks;
using NetCoreServer;
using NDesk.Options;
namespace UdpMulticastServer
{
class MulticastServer : UdpServer
{
public MulticastServer(IPAddress address, int port) : base(address, port) {}
protected override void OnError(SocketError error)
{
Console.WriteLine($"Server caught an error with code {error}");
}
}
class Program
{
static void Main(string[] args)
{
bool help = false;
string address = "239.255.0.1";
int port = 3333;
int messagesRate = 1000000;
int messageSize = 32;
var options = new OptionSet()
{
{ "h|?|help", v => help = v != null },
{ "a|address=", v => address = v },
{ "p|port=", v => port = int.Parse(v) },
{ "m|messages=", v => messagesRate = int.Parse(v) },
{ "s|size=", v => messageSize = int.Parse(v) }
};
try
{
options.Parse(args);
}
catch (OptionException e)
{
Console.Write("Command line error: ");
Console.WriteLine(e.Message);
Console.WriteLine("Try `--help' to get usage information.");
return;
}
if (help)
{
Console.WriteLine("Usage:");
options.WriteOptionDescriptions(Console.Out);
return;
}
Console.WriteLine($"Server address: {address}");
Console.WriteLine($"Server port: {port}");
Console.WriteLine($"Messages rate: {messagesRate}");
Console.WriteLine($"Message size: {messageSize}");
Console.WriteLine();
// Create a new echo server
var server = new MulticastServer(IPAddress.Any, 0);
server.OptionReuseAddress = true;
// Start the server
Console.Write("Server starting...");
server.Start(address, port);
Console.WriteLine("Done!");
// Start the multicasting thread
bool multicasting = true;
var multicaster = Task.Factory.StartNew(() =>
{
// Prepare message to multicast
byte[] message = new byte[messageSize];
// Multicasting loop
while (multicasting)
{
var start = DateTime.UtcNow;
for (int i = 0; i < messagesRate; i++)
server.Multicast(message);
var end = DateTime.UtcNow;
// Sleep for remaining time or yield
var milliseconds = (int)(end - start).TotalMilliseconds;
if (milliseconds < 1000)
Thread.Sleep(1000 - milliseconds);
else
Thread.Yield();
}
});
Console.WriteLine("Press Enter to stop the server or '!' to restart the server...");
// Perform text input
for (;;)
{
string line = Console.ReadLine();
if (string.IsNullOrEmpty(line))
break;
// Restart the server
if (line == "!")
{
Console.Write("Server restarting...");
server.Restart();
Console.WriteLine("Done!");
}
}
// Stop the multicasting thread
multicasting = false;
multicaster.Wait();
// Stop the server
Console.Write("Server stopping...");
server.Stop();
Console.WriteLine("Done!");
}
}
}