using System;
using System.Collections.Generic;
using System.Net.Sockets;
using System.Net;

namespace PortScanner
{
	public delegate void ScanCompleteHandler(Object sender, string datainfo);
	public delegate void ScanFailedHandler(Object sender);
	public class Scanner
	{
		public event ScanCompleteHandler ScanCallback;
		public event ScanFailedHandler FailedCallback;
		private string ip;
		private int port;
		public Scanner(string ip, int port)
		{
			this.ip = ip;
			this.port = port;
		}
		public string IP
		{
			get
			{
				return this.ip;
			}
			set
			{
				this.ip = value;
			}
		}
		public int Port
		{
			get
			{
				return this.port;
			}
			set
			{
				this.port = value;
			}
		}
		// checks the port
		public void Checks()
		{
			try
			{
				IPHostEntry hostEntry = Dns.GetHostEntry(this.ip);
				IPAddress address = hostEntry.AddressList[0];
				IPEndPoint ipe = new IPEndPoint(address, this.port);
				using (Socket tempSocket = new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp))
				{
					// if a connection to port is succesfull then access is open
					tempSocket.Connect(ipe);
					if (ScanCallback != null)
					{
						string inf = PortsInfo.GetInfo(this.port);
						ScanCallback(this, inf);
					}
					return;
				}//using
			}
			catch (SocketException)
			{
				if (FailedCallback != null)
					FailedCallback(this);
				return;
			}//try
		}
	}
}