96 lines
3.3 KiB
C#
96 lines
3.3 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 BlubbFish.Utils;
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namespace BroadcastReciever {
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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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}, 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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this.s_mcastAddress = IPAddress.Parse(CmdArgs.Instance.GetArgumentData("multicast"));
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this.s_mcastPort = 11000;
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// Start a multicast group.
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this.StartMulticast();
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// Display MulticastOption properties.
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this.MulticastOptionProperties();
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// Receive broadcast messages.
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this.ReceiveBroadcastMessages();
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}
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private void StartMulticast() {
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try {
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this.s_mcastSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
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IPAddress localIPAddr = IPAddress.Parse(CmdArgs.Instance.GetArgumentData("adapter"));
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//IPAddress localIP = IPAddress.Any;
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EndPoint localEP = new IPEndPoint(localIPAddr, this.s_mcastPort);
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this.s_mcastSocket.Bind(localEP);
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// Define a MulticastOption object specifying the multicast group
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// address and the local IPAddress.
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// The multicast group address is the same as the address used by the server.
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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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} catch(Exception e) {
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Console.WriteLine(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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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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}
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private void ReceiveBroadcastMessages() {
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Boolean done = false;
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Byte[] bytes = new Byte[100];
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IPEndPoint groupEP = new(this.s_mcastAddress, this.s_mcastPort);
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EndPoint remoteEP = new IPEndPoint(IPAddress.Any, 0);
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try {
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Console.WriteLine("Waiting for multicast packets.......");
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Console.WriteLine("Enter ^C to terminate.");
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while(!done) {
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Int32 length = this.s_mcastSocket.ReceiveFrom(bytes, ref remoteEP);
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Console.WriteLine("Received broadcast from \"{0}\" [{1}]: {2}", groupEP.ToString(), length, Encoding.ASCII.GetString(bytes, 0, bytes.Length));
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}
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this.s_mcastSocket.Close();
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} catch(Exception e) {
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Console.WriteLine(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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static void Main(String[] args) => _ = new Program(args);
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}
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}
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