using System;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Net.Sockets;
using System.Security.Cryptography;
using System.Diagnostics;
using System.Threading;
namespace dnstester
{
// Charles Putney
// 18 Quinns Road
// Co. Dublin
// Ireland
//
// This file and the code contained within is freeware and may be
// distributed and edited without restriction.
//
//
public class DNSTester : System.Windows.Forms.Form
{
private string[] CleanNames;
private int CleanNamesCount;
private System.Windows.Forms.TextBox DNSBox1;
private System.Windows.Forms.TextBox DNSBox2;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Button Testbutton;
private System.Windows.Forms.ListView ResultView;
private System.Windows.Forms.ColumnHeader DNS1Timing;
private System.Windows.Forms.ColumnHeader DNS2Timing;
private System.Windows.Forms.ColumnHeader WebName;
private System.Windows.Forms.ListBox StatusBox;
private System.Windows.Forms.Label label5;
private System.Windows.Forms.ColumnHeader DNS1IP;
private System.Windows.Forms.ColumnHeader DNS2IP;
private System.Windows.Forms.TextBox HTTPProxyBox;
private System.Windows.Forms.Label label6;
private CheckBox chckBox_static;
private object _dummy = new object();
private CheckBox chckBox_strs;
private TextBox textBox_strs;
private Button btn_stop;
private bool canrun;
private int globalcounter;
private StatusStrip statusStrip1;
private ToolStripStatusLabel label_idle;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public DNSTester()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.DNSBox1 = new System.Windows.Forms.TextBox();
this.DNSBox2 = new System.Windows.Forms.TextBox();
this.Testbutton = new System.Windows.Forms.Button();
this.ResultView = new System.Windows.Forms.ListView();
this.WebName = new System.Windows.Forms.ColumnHeader();
this.DNS1IP = new System.Windows.Forms.ColumnHeader();
this.DNS1Timing = new System.Windows.Forms.ColumnHeader();
this.DNS2IP = new System.Windows.Forms.ColumnHeader();
this.DNS2Timing = new System.Windows.Forms.ColumnHeader();
this.StatusBox = new System.Windows.Forms.ListBox();
this.HTTPProxyBox = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label5 = new System.Windows.Forms.Label();
this.label6 = new System.Windows.Forms.Label();
this.chckBox_static = new System.Windows.Forms.CheckBox();
this.chckBox_strs = new System.Windows.Forms.CheckBox();
this.textBox_strs = new System.Windows.Forms.TextBox();
this.btn_stop = new System.Windows.Forms.Button();
this.statusStrip1 = new System.Windows.Forms.StatusStrip();
this.label_idle = new System.Windows.Forms.ToolStripStatusLabel();
this.statusStrip1.SuspendLayout();
this.SuspendLayout();
//
// DNSBox1
//
this.DNSBox1.Location = new System.Drawing.Point(96, 40);
this.DNSBox1.Name = "DNSBox1";
this.DNSBox1.Size = new System.Drawing.Size(100, 20);
this.DNSBox1.TabIndex = 12;
this.DNSBox1.Text = "4.2.2.1";
this.DNSBox1.TextChanged += new System.EventHandler(this.DNSBox1_TextChanged);
//
// DNSBox2
//
this.DNSBox2.Location = new System.Drawing.Point(292, 40);
this.DNSBox2.Name = "DNSBox2";
this.DNSBox2.Size = new System.Drawing.Size(100, 20);
this.DNSBox2.TabIndex = 1;
this.DNSBox2.Text = "152.158.16.48";
this.DNSBox2.TextChanged += new System.EventHandler(this.DNSBox2_TextChanged);
//
// Testbutton
//
this.Testbutton.BackColor = System.Drawing.SystemColors.ButtonFace;
this.Testbutton.FlatAppearance.BorderColor = System.Drawing.SystemColors.ButtonFace;
this.Testbutton.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonHighlight;
this.Testbutton.FlatAppearance.MouseOverBackColor = System.Drawing.SystemColors.ButtonHighlight;
this.Testbutton.FlatStyle = System.Windows.Forms.FlatStyle.System;
this.Testbutton.Location = new System.Drawing.Point(632, 37);
this.Testbutton.Name = "Testbutton";
this.Testbutton.Size = new System.Drawing.Size(75, 23);
this.Testbutton.TabIndex = 4;
this.Testbutton.Text = "Test";
this.Testbutton.UseVisualStyleBackColor = false;
this.Testbutton.Click += new System.EventHandler(this.Testbutton_Click);
//
// ResultView
//
this.ResultView.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
this.WebName,
this.DNS1IP,
this.DNS1Timing,
this.DNS2IP,
this.DNS2Timing});
this.ResultView.FullRowSelect = true;
this.ResultView.GridLines = true;
this.ResultView.Location = new System.Drawing.Point(56, 80);
this.ResultView.MultiSelect = false;
this.ResultView.Name = "ResultView";
this.ResultView.Size = new System.Drawing.Size(700, 344);
this.ResultView.TabIndex = 11;
this.ResultView.UseCompatibleStateImageBehavior = false;
this.ResultView.View = System.Windows.Forms.View.Details;
//
// WebName
//
this.WebName.Text = " URL";
this.WebName.Width = 160;
//
// DNS1IP
//
this.DNS1IP.Text = "IP Address from DNS 1";
this.DNS1IP.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
this.DNS1IP.Width = 140;
//
// DNS1Timing
//
this.DNS1Timing.Text = "DNS 1 Timing";
this.DNS1Timing.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
this.DNS1Timing.Width = 120;
//
// DNS2IP
//
this.DNS2IP.Text = "IP Address from DNS 2";
this.DNS2IP.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
this.DNS2IP.Width = 140;
//
// DNS2Timing
//
this.DNS2Timing.Text = "DNS 2 Timing";
this.DNS2Timing.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
this.DNS2Timing.Width = 120;
//
// StatusBox
//
this.StatusBox.HorizontalScrollbar = true;
this.StatusBox.Location = new System.Drawing.Point(80, 456);
this.StatusBox.Name = "StatusBox";
this.StatusBox.Size = new System.Drawing.Size(616, 95);
this.StatusBox.TabIndex = 13;
//
// HTTPProxyBox
//
this.HTTPProxyBox.Location = new System.Drawing.Point(488, 40);
this.HTTPProxyBox.Name = "HTTPProxyBox";
this.HTTPProxyBox.Size = new System.Drawing.Size(100, 20);
this.HTTPProxyBox.TabIndex = 15;
this.HTTPProxyBox.TextChanged += new System.EventHandler(this.HTTPProxyBox_TextChanged);
//
// label1
//
this.label1.Location = new System.Drawing.Point(96, 16);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(100, 23);
this.label1.TabIndex = 2;
this.label1.Text = "DNS 1";
this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// label2
//
this.label2.Location = new System.Drawing.Point(288, 16);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(100, 23);
this.label2.TabIndex = 3;
this.label2.Text = "DNS 2";
this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// label5
//
this.label5.Location = new System.Drawing.Point(16, 488);
this.label5.Name = "label5";
this.label5.Size = new System.Drawing.Size(56, 24);
this.label5.TabIndex = 14;
this.label5.Text = "Status";
//
// label6
//
this.label6.Location = new System.Drawing.Point(488, 16);
this.label6.Name = "label6";
this.label6.Size = new System.Drawing.Size(100, 23);
this.label6.TabIndex = 16;
this.label6.Text = "HTTP Proxy";
this.label6.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// chckBox_static
//
this.chckBox_static.AutoSize = true;
this.chckBox_static.Location = new System.Drawing.Point(56, 431);
this.chckBox_static.Name = "chckBox_static";
this.chckBox_static.Size = new System.Drawing.Size(88, 17);
this.chckBox_static.TabIndex = 17;
this.chckBox_static.Text = "Use static list";
this.chckBox_static.UseVisualStyleBackColor = true;
//
// chckBox_strs
//
this.chckBox_strs.AutoSize = true;
this.chckBox_strs.Location = new System.Drawing.Point(151, 431);
this.chckBox_strs.Name = "chckBox_strs";
this.chckBox_strs.Size = new System.Drawing.Size(79, 17);
this.chckBox_strs.TabIndex = 18;
this.chckBox_strs.Text = "Stress Test";
this.chckBox_strs.UseVisualStyleBackColor = true;
this.chckBox_strs.CheckedChanged += new System.EventHandler(this.chckBox_strs_CheckedChanged);
//
// textBox_strs
//
this.textBox_strs.Enabled = false;
this.textBox_strs.Location = new System.Drawing.Point(237, 431);
this.textBox_strs.Name = "textBox_strs";
this.textBox_strs.Size = new System.Drawing.Size(100, 20);
this.textBox_strs.TabIndex = 19;
//
// btn_stop
//
this.btn_stop.Enabled = false;
this.btn_stop.FlatAppearance.BorderColor = System.Drawing.SystemColors.ButtonFace;
this.btn_stop.FlatAppearance.MouseDownBackColor = System.Drawing.SystemColors.ButtonHighlight;
this.btn_stop.FlatAppearance.MouseOverBackColor = System.Drawing.SystemColors.ButtonHighlight;
this.btn_stop.FlatStyle = System.Windows.Forms.FlatStyle.System;
this.btn_stop.Location = new System.Drawing.Point(632, 37);
this.btn_stop.Name = "btn_stop";
this.btn_stop.Size = new System.Drawing.Size(75, 23);
this.btn_stop.TabIndex = 20;
this.btn_stop.Text = "Stop";
this.btn_stop.UseVisualStyleBackColor = true;
this.btn_stop.Visible = false;
this.btn_stop.Click += new System.EventHandler(this.btn_stop_Click);
//
// statusStrip1
//
this.statusStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.label_idle});
this.statusStrip1.Location = new System.Drawing.Point(0, 551);
this.statusStrip1.Name = "statusStrip1";
this.statusStrip1.Size = new System.Drawing.Size(792, 22);
this.statusStrip1.TabIndex = 22;
this.statusStrip1.Text = "statusStrip1";
//
// label_idle
//
this.label_idle.Name = "label_idle";
this.label_idle.Size = new System.Drawing.Size(26, 17);
this.label_idle.Text = "Idle";
this.label_idle.Click += new System.EventHandler(this.toolStripStatusLabel1_Click);
//
// DNSTester
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.BackColor = System.Drawing.SystemColors.Window;
this.BackgroundImageLayout = System.Windows.Forms.ImageLayout.None;
this.ClientSize = new System.Drawing.Size(792, 573);
this.Controls.Add(this.statusStrip1);
this.Controls.Add(this.btn_stop);
this.Controls.Add(this.textBox_strs);
this.Controls.Add(this.chckBox_strs);
this.Controls.Add(this.chckBox_static);
this.Controls.Add(this.HTTPProxyBox);
this.Controls.Add(this.DNSBox1);
this.Controls.Add(this.DNSBox2);
this.Controls.Add(this.StatusBox);
this.Controls.Add(this.ResultView);
this.Controls.Add(this.Testbutton);
this.Controls.Add(this.label1);
this.Controls.Add(this.label2);
this.Controls.Add(this.label5);
this.Controls.Add(this.label6);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
this.MaximizeBox = false;
this.Name = "DNSTester";
this.ShowIcon = false;
this.Text = "DNS Tester";
this.Load += new System.EventHandler(this.DNSTester_Load);
this.statusStrip1.ResumeLayout(false);
this.statusStrip1.PerformLayout();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
///
private string DNS1,DNS2;
private ListViewItem listURL = new ListViewItem();
private ListViewItem.ListViewSubItem listDNS1IP = new ListViewItem.ListViewSubItem();
private ListViewItem.ListViewSubItem listDNS1time = new ListViewItem.ListViewSubItem();
private ListViewItem.ListViewSubItem listDNS2IP = new ListViewItem.ListViewSubItem();
private ListViewItem.ListViewSubItem listDNS2time = new ListViewItem.ListViewSubItem();
[STAThread]
static void Main()
{
Application.Run(new DNSTester());
}
private void Testbutton_Click(object sender, System.EventArgs e)
{
label_idle.Text = "Working... , Please wait until the status becomes idle again.";
canrun = true;
Testbutton.Enabled = false;
Testbutton.Visible = false;
btn_stop.Enabled = true;
btn_stop.Visible = true;
if (textBox_strs.Text == "" && chckBox_strs.Checked)
{
MessageBox.Show("Please fill in how many times you want the stress test to check the DNS", "Ooops!", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
StatusBox.Items.Add("--------------------------------------------------------------------------------------------------------TEST-----------------------------------------------------------------------------------------");
StatusBox.TopIndex = StatusBox.Items.Count - 1;
if (StatusBox.Items.Count > 5000)
{
StatusBox.Items.RemoveAt(0);
}
StatusBox.Update();
test();
}
private delegate void testdelegate();
private void test()
{
try
{
CleanNames = new string[500];
CleanNamesCount = 0;
DNS1 = DNSBox1.Text;
DNS2 = DNSBox2.Text;
if (DNS1 == "")
throw new Exception("DNS 1 can not be empty");
if (DNS2 == "")
throw new Exception("DNS 2 can not be empty");
ResultView.Items.Clear();
ResultView.Update();
Application.DoEvents();
_GetWebAddresses gwa = new _GetWebAddresses(GetWebAddresses);
ThreadPool.QueueUserWorkItem(new WaitCallback(gwa));
Application.DoEvents();
}
catch (Exception err)
{
MessageBox.Show(err.Message, err.Source + " error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private delegate void _GetWebAddresses(object obj);
private void GetWebAddresses(object obj)
{
_StatusBoxPrint print = new _StatusBoxPrint(StatusBoxPrint);
int i, j;
byte[] random = new Byte[256];
string Letters = "";
if (!chckBox_static.Checked)
{
// Make a 3 letter random string
//RNGCryptoServiceProvider is an implementation of a random number generator.
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
rng.GetBytes(random); // The array is now filled with cryptographically strong random bytes.
for (i = 1; i < 256; i++)
{
// Just take the first three letters
if (random[i] > 0x40 && random[i] < 0x5b) Letters = Letters + Convert.ToChar(random[i]);
if (Letters.Length == 3) break;
}
// Use Google to get random addresses for DNS testing
// Initialize the WebRequest.
StatusBox.Invoke(print, "Web Proxy set to: " + HTTPProxyBox.Text);
StatusBox.Invoke(print, "Getting Google request");
Application.DoEvents();
try
{
StreamWriter output = new StreamWriter("serverlist");
WebRequest GoogleRequest = WebRequest.Create("http://www.google.com/search?num=100&q=" + Letters); //Letters);
WebResponse GoogleResponse = GoogleRequest.GetResponse();
Application.DoEvents();
// Get the response stream.
Stream GoogleStream = GoogleResponse.GetResponseStream();
StatusBox.Invoke(print, "Google response received");
Application.DoEvents();
// Use a StreamReader to read the entire response.
StreamReader GoogleReader = new StreamReader(GoogleStream, Encoding.ASCII);
string GoogleString = GoogleReader.ReadToEnd();
// Close the response stream and response to free resources.
GoogleStream.Close();
GoogleResponse.Close();
Application.DoEvents();
// find all .xxx.com addresses
MatchCollection HostNames;
string[] Names = new string[1000];
// Create a new Regex object and define the regular expression.
Regex Dotcom = new Regex("[.]([A-Za-z]*)[.]com");
// Use the Matches method to find all matches in the input string.
HostNames = Dotcom.Matches(GoogleString);
Application.DoEvents();
// Loop through the match collection to retrieve all
// matches and delete the leading "."
for (i = 0; i < HostNames.Count; i++)
{
Names[i] = HostNames[i].Value.Remove(0, 1);
Application.DoEvents();
}
// eliminate google.com and repeated entries
for (i = 0; i < HostNames.Count - 1; i++)
{
if (Names[i] == "google.com") Names[i] = "";
for (j = i + 1; j < HostNames.Count; j++)
{
if (Names[i] == Names[j]) Names[j] = "";
Application.DoEvents();
}
}
// count list and compact
j = 0;
for (i = 0; i < HostNames.Count; i++)
{
if (Names[i] != "")
{
CleanNames[j] = Names[i];
output.WriteLine(CleanNames[j]);
j++;
}
Application.DoEvents();
}
CleanNamesCount = j;
StatusBox.Invoke(print, CleanNamesCount + " Random URL's found");
output.Close();
}
catch
{
StatusBox.Invoke(print, "Host Google.com not found - are you connected ?");
}
}
else
{
try
{
StatusBox.Invoke(print, "Using preloaded static list");
StreamReader input = new StreamReader("serverlist");
int k = 0;
string tmp;
while (!input.EndOfStream)
{
tmp=input.ReadLine();
if (tmp != "")
{
CleanNames[k] = tmp;
k++;
}
}
CleanNamesCount = k;
input.Close();
}
catch (Exception e)
{
MessageBox.Show(e.Message, e.Source + " error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
try
{
_UpdateResultView urv = new _UpdateResultView(UpdateResultView);
ResultView.Invoke(urv);
CheckDNS(CleanNames, CleanNamesCount, DNS1, DNS2);
}
catch (Exception e)
{
MessageBox.Show(e.Message, e.Source + " error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private delegate void _UpdateResultView();
private void UpdateResultView()
{
int i;
for (i = 0; i < CleanNamesCount; i++)
{
ListViewItem listURL = new ListViewItem(CleanNames[i]);
listURL.SubItems.Add(" ");
listURL.SubItems.Add(" ");
listURL.SubItems.Add(" ");
listURL.SubItems.Add(" ");
ResultView.Items.Add(listURL);
}
ResultView.EnsureVisible(1);
ResultView.Update();
}
private void CheckDNS(string[] URLNames, int URLNamescount, string DNSAddress1, string DNSAddress2)
{
int i;
//const int DNSReceiveTimeout=5000;
//ManualResetEvent[] doneEvents = new ManualResetEvent[URLNamescount];
i = 0;
// int TransactionDNS=0;
// Start the clock
// i=0; // for testing - do one
mine me;
globalcounter = 0;
for (i=0;i<URLNamescount;i++)
{
if (!canrun)
return;
_dnscheck ddnscheck = new _dnscheck(dnscheck);
me = new mine(URLNames, URLNamescount, DNSAddress1, DNSAddress2, i);
ThreadPool.QueueUserWorkItem(new WaitCallback(ddnscheck), me);
globalcounter++;
}
//WaitHandle.WaitAll(me._doneEvent);
}
private delegate void _dnscheck(object me);
private void dnscheck(object me)
{
int counter = 0;
try
{
if (chckBox_strs.Checked)
{
int tmpint = Convert.ToInt32(textBox_strs.Text.Trim());
for (int j = 0; j < tmpint && canrun; j++)
{
mine mo = (mine)me;
int i = mo.index;
string QueryString;
const string TransactionID1 = "Q1"; // Use transaction ID of Q1 and Q2 to identify our packet and DNS
const string TransactionID2 = "Q2";
const string TypeString = "\u0001" + "\u0000" + "\u0000" + "\u0001" + "\u0000" + "\u0000" + "\u0000" + "\u0000" + "\u0000" + "\u0000";
const string TrailerString = "\u0000" + "\u0000" + "\u0001" + "\u0000" + "\u0001";
int URLNameStartLength, DomainNameLength, index, TransactionDNS=0;
long StopTime;
string DeltaTime="";
string ReceiveString, IPResponse="";
string URLNameStart="", DomainName="";
const int IPPort = 53;
byte[] Receivebytes;
Socket DNSsocket;
byte[] Sendbytes;
Receivebytes = new byte[512];
counter = 0;
const int DNSReceiveTimeout = 5000;
third:
try
{
Receivebytes = new byte[512];
long StartTime;
if (counter == 1)
{
URLNameStart = mo.URLNames[i].Substring(0, mo.URLNames[i].IndexOf("."));
DomainName = mo.URLNames[i].Substring(mo.URLNames[i].IndexOf(".") + 1, mo.URLNames[i].Length - mo.URLNames[i].IndexOf(".") - 1);
IPEndPoint dnsEP2 = new IPEndPoint(IPAddress.Parse(mo.DNSAddress2), IPPort);
Sendbytes = new byte[256];
StartTime = DateTime.Now.Ticks;
DNSsocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
DNSsocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, DNSReceiveTimeout);
QueryString = TransactionID2 + TypeString + (char)URLNameStart.Length + URLNameStart + (char)DomainName.Length + DomainName + TrailerString;
Sendbytes = Encoding.ASCII.GetBytes(QueryString);
DNSsocket.SendTo(Sendbytes, Sendbytes.Length, SocketFlags.None, dnsEP2);
}
// Build the query
else
{
StartTime = DateTime.Now.Ticks;
DNSsocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
DNSsocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, DNSReceiveTimeout);
Sendbytes = new byte[256];
URLNameStart = mo.URLNames[i].Substring(0, mo.URLNames[i].IndexOf("."));
DomainName = mo.URLNames[i].Substring(mo.URLNames[i].IndexOf(".") + 1, mo.URLNames[i].Length - mo.URLNames[i].IndexOf(".") - 1);
IPEndPoint dnsEP1 = new IPEndPoint(IPAddress.Parse(mo.DNSAddress1), IPPort);
QueryString = TransactionID1 + TypeString + (char)URLNameStart.Length + URLNameStart + (char)DomainName.Length + DomainName + TrailerString;
Sendbytes = Encoding.ASCII.GetBytes(QueryString);
DNSsocket.SendTo(Sendbytes, Sendbytes.Length, SocketFlags.None, dnsEP1);
}
// send the same message to both DNS servers except for the transaction ID
// wait for a response up to timeout
second:
DNSsocket.Receive(Receivebytes);
// make sure the message returned is ours
if (Receivebytes[0] == Sendbytes[0] && (Receivebytes[1] == 0x31) || (Receivebytes[1] == 0x32))
{
if (Receivebytes[2] == 0x81 && Receivebytes[3] == 0x80)
{
// Get the time now
StopTime = DateTime.Now.Ticks;
DeltaTime = Convert.ToString((double)(StopTime - StartTime) / 10000000);
// Decode the answers
// Find the URL that was returned
TransactionDNS = Receivebytes[1];
ReceiveString = Encoding.ASCII.GetString(Receivebytes);
index = 12;
URLNameStartLength = Receivebytes[index];
index++;
URLNameStart = ReceiveString.Substring(index, URLNameStartLength);
index = index + URLNameStartLength;
DomainNameLength = Receivebytes[index];
index++;
DomainName = ReceiveString.Substring(index, DomainNameLength);
index = index + DomainNameLength;
index = index + 8;
// Get the record type
int ResponseType = Receivebytes[index];
index = index + 9;
// Get the IP address if applicable
IPResponse = "";
switch (ResponseType)
{
case 1: IPResponse = Convert.ToString(Receivebytes[index]) + "."
+ Convert.ToString(Receivebytes[index + 1]) + "."
+ Convert.ToString(Receivebytes[index + 2]) + "."
+ Convert.ToString(Receivebytes[index + 3]); break;
case 5: IPResponse = "CNAME"; break;
case 6: IPResponse = "SOA"; break;
}
//StatusBoxPrint("DNS Answer: " + mo.URLNameStart + "." + mo.DomainName + " = " + IPResponse);
if (!canrun)
return;
if (j % 20 == 0 && j!=0 && canrun && chckBox_strs.Checked || Convert.ToInt32(textBox_strs.Text)<20 || j==1)
{
// Find the URL entry in the list
yours mi = new yours();
mi.IPResponse = IPResponse;
mi.DeltaTime = DeltaTime;
mi.TransactionDNS = TransactionDNS;
mi.i = i;
mi.URLNameStart = URLNameStart;
mi.DomainName = DomainName;
mi.URLNamescount = mo.URLNamescount;
if (ResultView.InvokeRequired)
{
changeListViewItems my = new changeListViewItems(_changeListViewItems);
ResultView.Invoke(my, mi);
}
else
{
_changeListViewItems(mi);
}
}
}
if (!canrun)
return;
}
// close the socket
DNSsocket.Close();
// mo._doneEvent[i].Set();
if (counter == 0 && canrun)
{
URLNameStart = mo.URLNames[i].Substring(0, mo.URLNames[i].IndexOf("."));
DomainName = mo.URLNames[i].Substring(mo.URLNames[i].IndexOf(".") + 1, mo.URLNames[i].Length - mo.URLNames[i].IndexOf(".") - 1);
IPEndPoint dnsEP2 = new IPEndPoint(IPAddress.Parse(mo.DNSAddress2), IPPort);
Sendbytes = new byte[256];
StartTime = DateTime.Now.Ticks;
DNSsocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
DNSsocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, DNSReceiveTimeout);
QueryString = TransactionID2 + TypeString + (char)URLNameStart.Length + URLNameStart + (char)DomainName.Length + DomainName + TrailerString;
Sendbytes = Encoding.ASCII.GetBytes(QueryString);
DNSsocket.SendTo(Sendbytes, Sendbytes.Length, SocketFlags.None, dnsEP2);
counter++;
goto second;
}
if (!canrun)
return;
}
catch (Exception e)
{
_StatusBoxPrint status = new _StatusBoxPrint(StatusBoxPrint);
StatusBox.Invoke(status, e.Message);
if (counter == 0 && canrun)
{
counter++;
goto third;
}
if (!canrun)
return;
}
}
}
else
{
mine mo = (mine)me;
int i = mo.index;
string QueryString;
const string TransactionID1 = "Q1"; // Use transaction ID of Q1 and Q2 to identify our packet and DNS
const string TransactionID2 = "Q2";
const string TypeString = "\u0001" + "\u0000" + "\u0000" + "\u0001" + "\u0000" + "\u0000" + "\u0000" + "\u0000" + "\u0000" + "\u0000";
const string TrailerString = "\u0000" + "\u0000" + "\u0001" + "\u0000" + "\u0001";
int URLNameStartLength, DomainNameLength, index, TransactionDNS;
long StopTime;
string DeltaTime;
string ReceiveString, IPResponse;
string URLNameStart , DomainName;
const int IPPort = 53;
byte[] Receivebytes;
Socket DNSsocket;
byte[] Sendbytes;
Receivebytes = new byte[512];
const int DNSReceiveTimeout = 5000;
fourth:
if (!canrun)
return;
try
{
Receivebytes = new byte[512];
long StartTime;
if (counter == 1)
{
URLNameStart = mo.URLNames[i].Substring(0, mo.URLNames[i].IndexOf("."));
DomainName = mo.URLNames[i].Substring(mo.URLNames[i].IndexOf(".") + 1, mo.URLNames[i].Length - mo.URLNames[i].IndexOf(".") - 1);
IPEndPoint dnsEP2 = new IPEndPoint(IPAddress.Parse(mo.DNSAddress2), IPPort);
Sendbytes = new byte[256];
StartTime = DateTime.Now.Ticks;
DNSsocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
DNSsocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, DNSReceiveTimeout);
QueryString = TransactionID2 + TypeString + (char)URLNameStart.Length + URLNameStart + (char)DomainName.Length + DomainName + TrailerString;
Sendbytes = Encoding.ASCII.GetBytes(QueryString);
DNSsocket.SendTo(Sendbytes, Sendbytes.Length, SocketFlags.None, dnsEP2);
}
// Build the query
else
{
StartTime = DateTime.Now.Ticks;
DNSsocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
DNSsocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, DNSReceiveTimeout);
Sendbytes = new byte[256];
URLNameStart = mo.URLNames[i].Substring(0, mo.URLNames[i].IndexOf("."));
DomainName = mo.URLNames[i].Substring(mo.URLNames[i].IndexOf(".") + 1, mo.URLNames[i].Length - mo.URLNames[i].IndexOf(".") - 1);
IPEndPoint dnsEP1 = new IPEndPoint(IPAddress.Parse(mo.DNSAddress1), IPPort);
QueryString = TransactionID1 + TypeString + (char)URLNameStart.Length + URLNameStart + (char)DomainName.Length + DomainName + TrailerString;
Sendbytes = Encoding.ASCII.GetBytes(QueryString);
DNSsocket.SendTo(Sendbytes, Sendbytes.Length, SocketFlags.None, dnsEP1);
}
// send the same message to both DNS servers except for the transaction ID
// wait for a response up to timeout
second:
DNSsocket.Receive(Receivebytes);
// make sure the message returned is ours
if (Receivebytes[0] == Sendbytes[0] && (Receivebytes[1] == 0x31) || (Receivebytes[1] == 0x32))
{
if (Receivebytes[2] == 0x81 && Receivebytes[3] == 0x80)
{
// Get the time now
StopTime = DateTime.Now.Ticks;
DeltaTime = Convert.ToString((double)(StopTime - StartTime) / 10000000);
// Decode the answers
// Find the URL that was returned
TransactionDNS = Receivebytes[1];
ReceiveString = Encoding.ASCII.GetString(Receivebytes);
index = 12;
URLNameStartLength = Receivebytes[index];
index++;
URLNameStart = ReceiveString.Substring(index, URLNameStartLength);
index = index + URLNameStartLength;
DomainNameLength = Receivebytes[index];
index++;
DomainName = ReceiveString.Substring(index, DomainNameLength);
index = index + DomainNameLength;
index = index + 8;
// Get the record type
int ResponseType = Receivebytes[index];
index = index + 9;
// Get the IP address if applicable
IPResponse = "";
switch (ResponseType)
{
case 1: IPResponse = Convert.ToString(Receivebytes[index]) + "."
+ Convert.ToString(Receivebytes[index + 1]) + "."
+ Convert.ToString(Receivebytes[index + 2]) + "."
+ Convert.ToString(Receivebytes[index + 3]); break;
case 5: IPResponse = "CNAME"; break;
case 6: IPResponse = "SOA"; break;
}
//StatusBoxPrint("DNS Answer: " + mo.URLNameStart + "." + mo.DomainName + " = " + IPResponse);
if (!canrun)
return;
// Find the URL entry in the list
yours mi = new yours();
mi.IPResponse = IPResponse;
mi.DeltaTime = DeltaTime;
mi.TransactionDNS = TransactionDNS;
mi.i = i;
mi.URLNameStart = URLNameStart;
mi.DomainName = DomainName;
mi.URLNamescount = mo.URLNamescount;
if (ResultView.InvokeRequired)
{
changeListViewItems my = new changeListViewItems(_changeListViewItems);
ResultView.Invoke(my, mi);
Application.DoEvents();
}
else
{
_changeListViewItems(mi);
}
}
}
// close the socket
DNSsocket.Close();
// mo._doneEvent[i].Set();
if (counter == 0 && canrun)
{
URLNameStart = mo.URLNames[i].Substring(0, mo.URLNames[i].IndexOf("."));
DomainName = mo.URLNames[i].Substring(mo.URLNames[i].IndexOf(".") + 1, mo.URLNames[i].Length - mo.URLNames[i].IndexOf(".") - 1);
IPEndPoint dnsEP2 = new IPEndPoint(IPAddress.Parse(mo.DNSAddress2), IPPort);
Sendbytes = new byte[256];
StartTime = DateTime.Now.Ticks;
DNSsocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
DNSsocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, DNSReceiveTimeout);
QueryString = TransactionID2 + TypeString + (char)URLNameStart.Length + URLNameStart + (char)DomainName.Length + DomainName + TrailerString;
Sendbytes = Encoding.ASCII.GetBytes(QueryString);
DNSsocket.SendTo(Sendbytes, Sendbytes.Length, SocketFlags.None, dnsEP2);
counter++;
goto second;
}
}
catch (Exception e)
{
_StatusBoxPrint status = new _StatusBoxPrint(StatusBoxPrint);
StatusBox.Invoke(status, e.Message);
if (counter == 0 && canrun)
{
counter++;
goto fourth;
}
if (!canrun)
return;
}
}
}
catch (Exception e)
{
_StatusBoxPrint status = new _StatusBoxPrint(StatusBoxPrint);
StatusBox.Invoke(status, e.Message);
if (!canrun)
return;
}
Interlocked.Decrement(ref globalcounter);
if (Interlocked.Equals(globalcounter, 0))
{
changeButtonsstate ch = new changeButtonsstate(_changeButtonsstate);
Testbutton.Invoke(ch);
changeButtonsstatestop chs = new changeButtonsstatestop(_changeButtonsstatestop);
btn_stop.Invoke(chs);
//changelabel_idle chl = new changelabel_idle(_changelabel_idle);
//label_idle.Invoke(chl, "ide");
label_idle.Text = "Idle";
}
}
private delegate void changelabel_idle(object obj);
private void _changelabel_idle(object obj)
{
string tmp = (string)obj;
label_idle.Text = tmp;
}
private delegate void changeButtonsstate();
private void _changeButtonsstate()
{
Testbutton.Enabled = true;
Testbutton.Visible = true;
}
private delegate void changeButtonsstatestop();
private void _changeButtonsstatestop()
{
btn_stop.Enabled = false;
btn_stop.Visible = false;
}
private delegate void changeListViewItems(object obj);
private void _changeListViewItems(object obj)
{
Application.DoEvents();
if (!canrun)
return;
yours mo = (yours)obj;
string DeltaTime = mo.DeltaTime;
string sDeltaTime;
for (int i = 0; i < mo.URLNamescount; i++)
{
if (ResultView.Items[i].Text == mo.URLNameStart + "." + mo.DomainName)
{
Application.DoEvents();
switch (mo.TransactionDNS)
{
case 0x31:
ResultView.Items[i].SubItems[1].Text = Convert.ToString(mo.IPResponse);
sDeltaTime = Convert.ToString(DeltaTime);
if (sDeltaTime.Length > 5) ResultView.Items[i].SubItems[2].Text = sDeltaTime.Substring(0, 5);
else ResultView.Items[i].SubItems[2].Text = sDeltaTime;
ResultView.Items[i].ForeColor = System.Drawing.Color.Red;
//ResultView.EnsureVisible(i);
Application.DoEvents();
ResultView.Update();
Application.DoEvents();
ResultView.Items[i].ForeColor = System.Drawing.Color.Black;
break;
case 0x32:
ResultView.Items[i].SubItems[3].Text = Convert.ToString(mo.IPResponse);
sDeltaTime = Convert.ToString(DeltaTime);
if (sDeltaTime.Length > 5) ResultView.Items[i].SubItems[4].Text = sDeltaTime.Substring(0, 5);
else ResultView.Items[i].SubItems[4].Text = sDeltaTime;
ResultView.Items[i].ForeColor = System.Drawing.Color.Red;
//ResultView.EnsureVisible(i);
Application.DoEvents();
ResultView.Update();
Application.DoEvents();
ResultView.Items[i].ForeColor = System.Drawing.Color.Black;
break;
}
}
}
}
private void StatusBox_TextChanged(object sender, System.EventArgs e)
{
StatusBox.TopIndex=StatusBox.Items.Count;
StatusBox.Update();
}
private delegate void _StatusBoxPrint(object obj);
private void StatusBoxPrint(object obj)
{
if (canrun)
{
string LogText = (string)obj;
StatusBox.Items.Add(DateTime.Now + " " + LogText);
StatusBox.TopIndex = StatusBox.Items.Count - 1;
if (StatusBox.Items.Count > 5000)
{
StatusBox.Items.RemoveAt(0);
}
StatusBox.Update();
}
}
private void DNSAvg1Box_TextChanged(object sender, System.EventArgs e)
{
}
private void DNSAvg2Box_TextChanged(object sender, System.EventArgs e)
{
}
private void DNSBox1_TextChanged(object sender, System.EventArgs e)
{
DNS1=DNSBox1.Text;
}
private void DNSBox2_TextChanged(object sender, System.EventArgs e)
{
DNS2=DNSBox2.Text;
}
private void ResultBox_SelectedIndexChanged(object sender, System.EventArgs e)
{
}
private void HTTPProxyBox_TextChanged(object sender, System.EventArgs e)
{
if (HTTPProxyBox.Text != "")
{
WebRequest.DefaultWebProxy.GetProxy( new System.Uri(HTTPProxyBox.Text));
}
else
{
WebRequest.DefaultWebProxy.GetProxy(new System.Uri(WebRequest.GetSystemWebProxy().ToString()));
}
}
private void DNSTester_Load(object sender, EventArgs e)
{
}
private void chckBox_strs_CheckedChanged(object sender, EventArgs e)
{
CheckBox tmp = (CheckBox)sender;
if (tmp.Checked)
{
textBox_strs.Enabled = true;
}
else
textBox_strs.Enabled = false;
}
private void btn_stop_Click(object sender, EventArgs e)
{
canrun = false;
Testbutton.Enabled = true;
Testbutton.Visible = true;
btn_stop.Enabled = false;
btn_stop.Visible = false;
label_idle.Text = "Idle";
}
private void label_idle_Click(object sender, EventArgs e)
{
}
private void toolStripStatusLabel1_Click(object sender, EventArgs e)
{
}
}
public class mine
{
public mine(string[] URLNames, int URLNamescount, string DNSAddress1, string DNSAddress2, int index)
{
this.DNSAddress1 = DNSAddress1;
this.DNSAddress2 = DNSAddress2;
this.URLNames = URLNames;
this.URLNamescount = URLNamescount;
this.index = index;
}
public string[] URLNames;
public int URLNamescount;
public string DNSAddress1, DNSAddress2;
public int index;
}
public class yours
{
public yours()
{
}
public string IPResponse, DeltaTime, URLNameStart, DomainName;
public int TransactionDNS, i, URLNamescount;
}
}
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