first commit

2026-08-03 10:30:29 +02:00
commit e4aee5039b
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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Utils\Utils\Utils\Utils.csproj" />
+  </ItemGroup>
+
+</Project>
@@ -0,0 +1,106 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+using System.Threading;
+
+using BlubbFish.Utils;
+
+namespace BroadcastSender {
+  class Program {
+    private readonly IPAddress s_mcastAddress;
+    private readonly Int32 s_mcastPort;
+    private Socket s_mcastSocket;
+    private MulticastOption s_mcastOption;
+
+    public Program(String[] args) {
+      CmdArgs.Instance.SetArguments(new Dictionary<String, CmdArgs.VaildArguments>() {
+        { "adapter", new CmdArgs.VaildArguments(CmdArgs.ArgLength.Touple, true) },
+        { "multicast", new CmdArgs.VaildArguments(CmdArgs.ArgLength.Touple, false, "224.0.24.1") },
+        { "count", new CmdArgs.VaildArguments(CmdArgs.ArgLength.Touple, false, "100") },
+        { "wait", new CmdArgs.VaildArguments(CmdArgs.ArgLength.Touple, false, "500") }
+      }, args);
+      if(!CmdArgs.Instance.HasAllRequiredArguments()) {
+        Console.Error.WriteLine(CmdArgs.Instance.GetUsageList("BroadcastReciever.exe"));
+        _ = Console.ReadLine();
+        return;
+      }
+
+      // Initialize the multicast address group and multicast port.
+      // Both address and port are selected from the allowed sets as
+      // defined in the related RFC documents. These are the same
+      // as the values used by the sender.
+      this.s_mcastAddress = IPAddress.Parse(CmdArgs.Instance.GetArgumentData("multicast"));
+      this.s_mcastPort = 11000;
+
+      // Join the listener multicast group.
+      this.JoinMulticastGroup();
+
+      // Display MulticastOption properties.
+      this.MulticastOptionProperties();
+
+      // Broadcast the message to the listener.
+      this.BroadcastMessage("Hello multicast listener.");
+    }
+
+    void JoinMulticastGroup() {
+      try {
+        // Create a multicast socket.
+        this.s_mcastSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp) {
+          Ttl = 32
+        };
+
+        // Get the local IP address used by the listener and the sender to
+        // exchange multicast messages.
+        IPAddress localIPAddr = IPAddress.Parse(CmdArgs.Instance.GetArgumentData("adapter"));
+
+        // Create an IPEndPoint object.
+        // Bind this endpoint to the multicast socket.
+        this.s_mcastSocket.Bind(new IPEndPoint(localIPAddr, 0));
+
+        // Define a MulticastOption object specifying the multicast group
+        // address and the local IP address.
+        // The multicast group address is the same as the address used by the listener.
+        this.s_mcastOption = new MulticastOption(this.s_mcastAddress, localIPAddr);
+
+        this.s_mcastSocket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, this.s_mcastOption);
+        this.s_mcastSocket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, 64);
+      } catch(Exception e) {
+        Console.WriteLine("\n" + e.ToString());
+        _ = Console.ReadLine();
+        return;
+      }
+    }
+
+    void BroadcastMessage(String message) {
+      IPEndPoint endPoint;
+
+      try {
+        //Send multicast packets to the listener.
+        for(Int32 i = 0; i < Int32.Parse(CmdArgs.Instance.GetArgumentData("count")); i++) {
+
+          endPoint = new IPEndPoint(this.s_mcastAddress, this.s_mcastPort);
+          _ = this.s_mcastSocket.SendTo(Encoding.ASCII.GetBytes(message+" "+i), endPoint);
+          Console.WriteLine("Multicast data sent "+i+".....");
+          Thread.Sleep(Int32.Parse(CmdArgs.Instance.GetArgumentData("wait")));
+        }
+      } catch(Exception e) {
+        Console.WriteLine("\n" + e.ToString());
+        _ = Console.ReadLine();
+        return;
+      }
+
+      this.s_mcastSocket.Close();
+    }
+
+    private void MulticastOptionProperties() {
+      Console.WriteLine("Current multicast group is: " + this.s_mcastOption.Group);
+      Console.WriteLine("Current multicast local address is: " + this.s_mcastOption.LocalAddress);
+      Console.WriteLine("Current multicast ttl: " + this.s_mcastSocket.GetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive));
+      Console.WriteLine("Current ttl: " + this.s_mcastSocket.Ttl);
+    }
+
+    static void Main(String[] args) => _ = new Program(args);
+  }
+}