Bad Udp Client

Posted on by coder
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/*
C# Network Programming 
by Richard Blum

Publisher: Sybex 
ISBN: 0782141765
*/
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class BadUdpClient
{
   public static void Main()
   {
      byte[] data = new byte[30];
      string input, stringData;
      IPEndPoint ipep = new IPEndPoint(
                      IPAddress.Parse("127.0.0.1"), 9050);

      Socket server = new Socket(AddressFamily.InterNetwork,
                     SocketType.Dgram, ProtocolType.Udp);

      string welcome = "Hello, are you there?";
      data = Encoding.ASCII.GetBytes(welcome);
      server.SendTo(data, data.Length, SocketFlags.None, ipep);

      IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
      EndPoint tmpRemote = (EndPoint)sender;

      data = new byte[30];
      int recv = server.ReceiveFrom(data, ref tmpRemote);

      Console.WriteLine("Message received from {0}:", tmpRemote.ToString());
      Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));


      while(true)
      {
         input = Console.ReadLine();
         if (input == "exit")
            break;
         server.SendTo(Encoding.ASCII.GetBytes(input), tmpRemote);
         data = new byte[30];
         recv = server.ReceiveFrom(data, ref tmpRemote);
         stringData = Encoding.ASCII.GetString(data, 0, recv);
         Console.WriteLine(stringData);
      }
      Console.WriteLine("Stopping client");
      server.Close();
   }
}

Better Udp Client

Posted on by coder
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/*
C# Network Programming 
by Richard Blum

Publisher: Sybex 
ISBN: 0782141765
*/
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class BetterdUdpClient
{
   public static void Main()
   {
      byte[] data = new byte[30];
      string input, stringData;
      IPEndPoint ipep = new IPEndPoint(
                      IPAddress.Parse("127.0.0.1"), 9050);

      Socket server = new Socket(AddressFamily.InterNetwork,
                     SocketType.Dgram, ProtocolType.Udp);

      string welcome = "Hello, are you there?";
      data = Encoding.ASCII.GetBytes(welcome);
      server.SendTo(data, data.Length, SocketFlags.None, ipep);

      IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
      EndPoint tmpRemote = (EndPoint)sender;

      data = new byte[30];
      int recv = server.ReceiveFrom(data, ref tmpRemote);

      Console.WriteLine("Message received from {0}:", tmpRemote.ToString());
      Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));


      int i = 30;
      while(true)
      {
         input = Console.ReadLine();
         if (input == "exit")
            break;
         server.SendTo(Encoding.ASCII.GetBytes(input), tmpRemote);
         data = new byte[i];
         try
         {
            recv = server.ReceiveFrom(data, ref tmpRemote);
            stringData = Encoding.ASCII.GetString(data, 0, recv);
            Console.WriteLine(stringData);
         } catch (SocketException)
         {
            Console.WriteLine("WARNING: data lost, retry message.");
            i += 10;
         }
      }
      Console.WriteLine("Stopping client");
      server.Close();
   }
}

Odd Udp Client

Posted on by coder
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using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class OddUdpClient
{
   public static void Main()
   {
      byte[] data = new byte[1024];
      string input, stringData;
      IPEndPoint ipep = new IPEndPoint(
                      IPAddress.Parse("127.0.0.1"), 9050);

      Socket server = new Socket(AddressFamily.InterNetwork,
                     SocketType.Dgram, ProtocolType.Udp);

      server.Connect(ipep);
      string welcome = "Hello, are you there?";
      data = Encoding.ASCII.GetBytes(welcome);
      server.Send(data);

      data = new byte[1024];
      int recv = server.Receive(data);

      Console.WriteLine("Message received from {0}:", ipep.ToString());
      Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));


      while(true)
      {
         input = Console.ReadLine();
         if (input == "exit")
            break;
         server.Send(Encoding.ASCII.GetBytes(input));
         data = new byte[1024];
         recv = server.Receive(data);
         stringData = Encoding.ASCII.GetString(data, 0, recv);
         Console.WriteLine(stringData);
      }
      Console.WriteLine("Stopping client");
      server.Close();
   }
}

Simple Udp Client

Posted on by coder
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/*
C# Network Programming 
by Richard Blum

Publisher: Sybex 
ISBN: 0782141765
*/
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class SimpleUdpClient
{
   public static void Main()
   {
      byte[] data = new byte[1024];
      string input, stringData;
      IPEndPoint ipep = new IPEndPoint(
                      IPAddress.Parse("127.0.0.1"), 9050);

      Socket server = new Socket(AddressFamily.InterNetwork,
                     SocketType.Dgram, ProtocolType.Udp);


      string welcome = "Hello, are you there?";
      data = Encoding.ASCII.GetBytes(welcome);
      server.SendTo(data, data.Length, SocketFlags.None, ipep);

      IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
      EndPoint Remote = (EndPoint)sender;

      data = new byte[1024];
      int recv = server.ReceiveFrom(data, ref Remote);

      Console.WriteLine("Message received from {0}:", Remote.ToString());
      Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));

      while(true)
      {
         input = Console.ReadLine();
         if (input == "exit")
            break;
         server.SendTo(Encoding.ASCII.GetBytes(input), Remote);
         data = new byte[1024];
         recv = server.ReceiveFrom(data, ref Remote);
         stringData = Encoding.ASCII.GetString(data, 0, recv);
         Console.WriteLine(stringData);
      }
      Console.WriteLine("Stopping client");
      server.Close();
   }
}

Time out Udp Client

Posted on by coder
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/*
C# Network Programming 
by Richard Blum

Publisher: Sybex 
ISBN: 0782141765
*/
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class TimeoutUdpClient
{
   public static void Main()
   {
      byte[] data = new byte[1024];
      string input, stringData;
      int recv;
      IPEndPoint ipep = new IPEndPoint(
                      IPAddress.Parse("127.0.0.1"), 9050);

      Socket server = new Socket(AddressFamily.InterNetwork,
                     SocketType.Dgram, ProtocolType.Udp);

      int sockopt = (int)server.GetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout);
      Console.WriteLine("Default timeout: {0}", sockopt);
      server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 3000);
      sockopt = (int)server.GetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout);
      Console.WriteLine("New timeout: {0}", sockopt);

      string welcome = "Hello, are you there?";
      data = Encoding.ASCII.GetBytes(welcome);
      server.SendTo(data, data.Length, SocketFlags.None, ipep);

      IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
      EndPoint tmpRemote = (EndPoint)sender;

      data = new byte[1024];
      recv = server.ReceiveFrom(data, ref tmpRemote);
      Console.WriteLine("Message received from {0}:", tmpRemote.ToString());
      Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));

      while(true)
      {
         input = Console.ReadLine();
         if (input == "exit")
            break;
         server.SendTo(Encoding.ASCII.GetBytes(input), tmpRemote);
         data = new byte[1024];
         recv = server.ReceiveFrom(data, ref tmpRemote);
         stringData = Encoding.ASCII.GetString(data, 0, recv);
         Console.WriteLine(stringData);
      }
      Console.WriteLine("Stopping client");
      server.Close();
   }
}

Test Udp Client

Posted on by coder
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using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class TestUdpClient
{
   public static void Main()
   {
      byte[] data = new byte[1024];
      IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9050);

      Socket server = new Socket(AddressFamily.InterNetwork,SocketType.Dgram, ProtocolType.Udp);

      string welcome = "Hello, are you there?";
      data = Encoding.ASCII.GetBytes(welcome);
      server.SendTo(data, data.Length, SocketFlags.None, ipep);

      IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
      EndPoint tmpRemote = (EndPoint)sender;

      data = new byte[1024];
      int recv = server.ReceiveFrom(data, ref tmpRemote);

      Console.WriteLine("Message received from {0}:", tmpRemote.ToString());
      Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));


      server.SendTo(Encoding.ASCII.GetBytes("message 1"), tmpRemote);
      server.SendTo(Encoding.ASCII.GetBytes("message 2"), tmpRemote);
      server.SendTo(Encoding.ASCII.GetBytes("message 3"), tmpRemote);
      server.SendTo(Encoding.ASCII.GetBytes("message 4"), tmpRemote);
      server.SendTo(Encoding.ASCII.GetBytes("message 5"), tmpRemote);

      Console.WriteLine("Stopping client");
      server.Close();
   }
}

Get TCP stream

Posted on by coder
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using System;
using System.IO;
using System.Net.Sockets;

public class NetWriter {
  public static void Main(string [] args) {

    string address = "www.kutayzorlu.com/java2s/com";
    int port = 80;

    TcpClient client = new TcpClient(address,port);
    NetworkStream stream = client.GetStream( );

    StreamWriter writer = new StreamWriter(stream);

    writer.WriteLine("www.kutayzorlu.com/java2s/com
");
    writer.Flush( );

    using (StreamReader reader = new StreamReader(stream)) {
      while (reader.Peek( ) != -1) {
        Console.WriteLine(reader.ReadLine( ));
      }
    }
  }
}