Do you think this is stupid ?

[Sharpoverride]

Try this peace of code .. instead of giving an error it connects to a ipHostEntry that doesn't exist Can anyone tell me why ? Why me ? Oh .. why ? using System; using System.Net; using System.Net.Sockets; namespace ThisIsStupid { public class MainC { public static void Main() { IPEndPoint ipe = new IPEndPoint( IPAddress.Parse( "193.168.0.6"),21); //System.Diagnostics.Debug.WriteLine( ipadd ); Socket s = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp); // Console.WriteLine(s.Connected ); s.Connect(ipe ); if( s.Connected ) { Console.WriteLine( " I have a socket that didn't connect to nothing "); Console.WriteLine(" But it's status is connected "); Console.WriteLine(" Uraaa !"); } } } } I've made a client - server aplication and my class informes the main program that the requiered connection exists when no client is available there .. ? Why ... is that correct ... what am I doing rong ? Lazar Mihai Highschool student

[Colin Angus Mackay]

Port 21 is the port used by FTP. Do you have an existing FTP server on that machine?

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[Sharpoverride]

NO .. I tried with port 7891 and with 4545 .. if you have any other suggestions ... try on you computer you'll get the same result Lazar Mihai Highschool student

[Colin Angus Mackay]

I extended your class so I could see what was happening. When I tried the other ports you mentioned I got an exception to say that it wasn't connected. When I tried port 21 my application returned:

32 32 30 20 4d 69 63 72 : 220 Micr
6f 73 6f 66 74 20 46 54 : osof t FT
50 20 53 65 72 76 69 63 : P Se rvic
65 d a 0 0 0 0 0 : e

public class MainC
{
	private static byte\[\] buffer = new byte\[1024\];
	public static void Main()
	{
		IPEndPoint ipe = new IPEndPoint( IPAddress.Parse( "127.0.0.1"),21);
		//System.Diagnostics.Debug.WriteLine( ipadd );
		Socket s = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
		// Console.WriteLine(s.Connected );
		s.Connect(ipe );

		if( s.Connected )
		{
			Console.WriteLine( " I have a socket that didn't connect to nothing ");
			Console.WriteLine(" But it's status is connected ");
			Console.WriteLine(" Uraaa !");
			
		}
		else
		{
			Console.WriteLine("Not Connected");
		}

		int result = s.Receive(buffer, 1024, SocketFlags.Peek);
		Console.WriteLine("Received {0} bytes", result);
		for(int i=0; i<result; i+=8)
		{
			Console.WriteLine("{0:x} {1:x} {2:x} {3:x}  {4:x} {5:x} {6:x} {7:x} : {8}{9}{10}{11} {12}{13}{14}{15}", 
				buffer\[i\], buffer\[i+1\], buffer\[i+2\], buffer\[i+3\],
				buffer\[i+4\], buffer\[i+5\], buffer\[i+6\], buffer\[i+7\],
				(char)buffer\[i\], (char)buffer\[i+1\], (char)buffer\[i+2\], (char)buffer\[i+3\],
				(char)buffer\[i+4\], (char)buffer\[i+5\], (char)buffer\[i+6\], (char)buffer\[i+7\]
				);
		}
		Console.ReadLine();
	}

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[Sharpoverride]

Don't connect to local host ... on local hosts it works ... I want on other ip addresses not to work ... Lazar Mihai Highschool student

[Colin Angus Mackay]

Sorry, same deal if I use my external IP address. On port 21 I get a message from the FTP service I'm running, and on the other two ports it causes an exception because it cannot connect.

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[Daniel Turini]

Try this: telnet 193.168.0.6 21 If telnet connects, this is a valid host/port combination. I see dead pixels Yes, even I am blogging now!

[Sharpoverride]

You are right .. thanks I think I 've fixed the bug Lazar Mihai Highschool student

[Sharpoverride]

Cool ... telnet worked .. why if the address doesn't exist on the LAN .. ? Lazar Mihai Highschool student