107 lines
4.2 KiB
C#
107 lines
4.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Net;
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using System.Net.Sockets;
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using System.Text;
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using System.Threading;
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using BlubbFish.Utils;
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namespace BroadcastSender {
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class Program {
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private readonly IPAddress s_mcastAddress;
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private readonly Int32 s_mcastPort;
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private Socket s_mcastSocket;
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private MulticastOption s_mcastOption;
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public Program(String[] args) {
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CmdArgs.Instance.SetArguments(new Dictionary<String, CmdArgs.VaildArguments>() {
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{ "adapter", new CmdArgs.VaildArguments(CmdArgs.ArgLength.Touple, true) },
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{ "multicast", new CmdArgs.VaildArguments(CmdArgs.ArgLength.Touple, false, "224.0.24.1") },
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{ "count", new CmdArgs.VaildArguments(CmdArgs.ArgLength.Touple, false, "100") },
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{ "wait", new CmdArgs.VaildArguments(CmdArgs.ArgLength.Touple, false, "500") }
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}, args);
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if(!CmdArgs.Instance.HasAllRequiredArguments()) {
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Console.Error.WriteLine(CmdArgs.Instance.GetUsageList("BroadcastReciever.exe"));
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_ = Console.ReadLine();
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return;
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}
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// Initialize the multicast address group and multicast port.
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// Both address and port are selected from the allowed sets as
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// defined in the related RFC documents. These are the same
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// as the values used by the sender.
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this.s_mcastAddress = IPAddress.Parse(CmdArgs.Instance.GetArgumentData("multicast"));
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this.s_mcastPort = 11000;
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// Join the listener multicast group.
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this.JoinMulticastGroup();
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// Display MulticastOption properties.
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this.MulticastOptionProperties();
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// Broadcast the message to the listener.
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this.BroadcastMessage("Hello multicast listener.");
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}
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void JoinMulticastGroup() {
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try {
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// Create a multicast socket.
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this.s_mcastSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp) {
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Ttl = 32
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};
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// Get the local IP address used by the listener and the sender to
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// exchange multicast messages.
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IPAddress localIPAddr = IPAddress.Parse(CmdArgs.Instance.GetArgumentData("adapter"));
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// Create an IPEndPoint object.
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// Bind this endpoint to the multicast socket.
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this.s_mcastSocket.Bind(new IPEndPoint(localIPAddr, 0));
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// Define a MulticastOption object specifying the multicast group
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// address and the local IP address.
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// The multicast group address is the same as the address used by the listener.
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this.s_mcastOption = new MulticastOption(this.s_mcastAddress, localIPAddr);
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this.s_mcastSocket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, this.s_mcastOption);
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this.s_mcastSocket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, 64);
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} catch(Exception e) {
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Console.WriteLine("\n" + e.ToString());
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_ = Console.ReadLine();
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return;
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}
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}
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void BroadcastMessage(String message) {
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IPEndPoint endPoint;
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try {
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//Send multicast packets to the listener.
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for(Int32 i = 0; i < Int32.Parse(CmdArgs.Instance.GetArgumentData("count")); i++) {
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endPoint = new IPEndPoint(this.s_mcastAddress, this.s_mcastPort);
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_ = this.s_mcastSocket.SendTo(Encoding.ASCII.GetBytes(message+" "+i), endPoint);
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Console.WriteLine("Multicast data sent "+i+".....");
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Thread.Sleep(Int32.Parse(CmdArgs.Instance.GetArgumentData("wait")));
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}
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} catch(Exception e) {
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Console.WriteLine("\n" + e.ToString());
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_ = Console.ReadLine();
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return;
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}
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this.s_mcastSocket.Close();
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}
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private void MulticastOptionProperties() {
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Console.WriteLine("Current multicast group is: " + this.s_mcastOption.Group);
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Console.WriteLine("Current multicast local address is: " + this.s_mcastOption.LocalAddress);
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Console.WriteLine("Current multicast ttl: " + this.s_mcastSocket.GetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive));
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Console.WriteLine("Current ttl: " + this.s_mcastSocket.Ttl);
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}
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static void Main(String[] args) => _ = new Program(args);
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}
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}
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