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SubnetCalc.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Text.RegularExpressions;
using System.Net.Sockets;
using System.IO;
namespace IPv4SubnetCalculator
{
public partial class mainForm : Form
{
private Dictionary<IPClasses, int> classfullSubnetBits = new Dictionary<IPClasses,int>();
delegate void SetTextCallback(string text);
public mainForm()
{
InitializeComponent();
classfullSubnetBits.Add(IPClasses.A, 8);
classfullSubnetBits.Add(IPClasses.B, 16);
classfullSubnetBits.Add(IPClasses.C, 24);
classfullSubnetBits.Add(IPClasses.D, 32);
classfullSubnetBits.Add(IPClasses.E, 0);
classfullSubnetBits.Add(IPClasses.unknown, 0);
for (int maskBits = 1; maskBits <= 32; maskBits++)
{
int n = -1; //n = 32Bit set to 1
n <<= (32 - maskBits);
string subnet = (n & 255).ToString();
n >>= 8;
subnet = (n & 255) + "." + subnet;
n >>= 8;
subnet = (n & 255) + "." + subnet;
n >>= 8;
subnet = (n & 255) + "." + subnet;
cboCIDRMask.Items.Add(subnet);
cboCIDRMaskBits.Items.Add(maskBits.ToString());
cboAddrMask.Items.Add(subnet);
}
lblMask.Visible = false;
}
private void cboCIDRMaskBits_SelectedIndexChanged(object sender, EventArgs e)
{
cboCIDRMask.SelectedIndex = cboCIDRMaskBits.SelectedIndex;
lblMask.Text = "/" + cboCIDRMaskBits.Text;
lblMask.Visible = true;
updateSubnetConfigurationComboBoxes();
}
private void cboCIDRMask_SelectedIndexChanged(object sender, EventArgs e)
{
cboCIDRMaskBits.SelectedIndex = cboCIDRMask.SelectedIndex;
lblMask.Text = "/" + cboCIDRMaskBits.Text;
lblMask.Visible = true;
updateSubnetConfigurationComboBoxes();
}
private void updateSubnetConfigurationComboBoxes()
{
cboSubnetMask.Items.Clear();
cboSubnetMaskBits.Items.Clear();
cboSubnetHostBits.Items.Clear();
cboSubnets.Items.Clear();
cboHosts.Items.Clear();
int hostBits = 0;
for (int maskBits = cboCIDRMaskBits.SelectedIndex + 1; maskBits <= 32; maskBits++)
{
int n = -1; //n = 32Bit set to 1
n <<= (32 - maskBits);
string subnet = (n & 255).ToString();
n >>= 8;
subnet = (n & 255) + "." + subnet;
n >>= 8;
subnet = (n & 255) + "." + subnet;
n >>= 8;
subnet = (n & 255) + "." + subnet;
cboSubnetMask.Items.Add(subnet);
cboSubnetMaskBits.Items.Add(maskBits.ToString());
cboSubnets.Items.Add(Math.Pow(2, hostBits).ToString());
double hostNumber = Math.Pow(2, hostBits);
if (hostNumber == 1)
cboHosts.Items.Add("1");
else if (hostNumber == 2)
cboHosts.Items.Add("2 (RFC3021)");
else
cboHosts.Items.Add((hostNumber - 2).ToString());
cboSubnetHostBits.Items.Add(hostBits++.ToString());
}
cboSubnetMask.SelectedIndex = 0;
cboSubnetMask_SelectedIndexChanged(cboSubnetMask, new EventArgs());
}
private void cboSubnetMask_SelectedIndexChanged(object sender, EventArgs e)
{
cboSubnetMaskBits.SelectedIndex = cboSubnetMask.SelectedIndex;
cboSubnets.SelectedIndex = cboSubnetMask.SelectedIndex;
cboSubnetHostBits.SelectedIndex = cboSubnetHostBits.Items.Count - cboSubnetMask.SelectedIndex - 1;
cboHosts.SelectedIndex = cboHosts.Items.Count - cboSubnetMask.SelectedIndex - 1;
generateSubnetBitMask(rtbSubnetBitMask, cboCIDRMaskBits.SelectedIndex + 1, cboSubnetMaskBits.SelectedIndex, cboSubnetHostBits.SelectedIndex);
}
private void cboSubnetMaskBits_SelectedIndexChanged(object sender, EventArgs e)
{
cboSubnetMask.SelectedIndex = cboSubnetMaskBits.SelectedIndex;
cboSubnets.SelectedIndex = cboSubnetMaskBits.SelectedIndex;
cboSubnetHostBits.SelectedIndex = cboSubnetHostBits.Items.Count - cboSubnetMaskBits.SelectedIndex - 1;
cboHosts.SelectedIndex = cboHosts.Items.Count - cboSubnetMaskBits.SelectedIndex - 1;
generateSubnetBitMask(rtbSubnetBitMask, cboCIDRMaskBits.SelectedIndex + 1, cboSubnetMaskBits.SelectedIndex, cboSubnetHostBits.SelectedIndex);
}
private void cboSubnetHostBits_SelectedIndexChanged(object sender, EventArgs e)
{
cboSubnetMaskBits.SelectedIndex = cboSubnetMaskBits.Items.Count - cboSubnetHostBits.SelectedIndex - 1;
cboSubnets.SelectedIndex = cboSubnets.Items.Count - cboSubnetHostBits.SelectedIndex - 1;
cboSubnetMask.SelectedIndex = cboSubnetMask.Items.Count - cboSubnetHostBits.SelectedIndex - 1;
cboHosts.SelectedIndex = cboSubnetHostBits.SelectedIndex;
generateSubnetBitMask(rtbSubnetBitMask, cboCIDRMaskBits.SelectedIndex +1, cboSubnetMaskBits.SelectedIndex, cboSubnetHostBits.SelectedIndex);
}
private void cboSubnets_SelectedIndexChanged(object sender, EventArgs e)
{
cboSubnetMask.SelectedIndex = cboSubnets.SelectedIndex;
cboSubnetMaskBits.SelectedIndex = cboSubnets.SelectedIndex;
cboSubnetHostBits.SelectedIndex = cboSubnetHostBits.Items.Count - cboSubnets.SelectedIndex - 1;
cboHosts.SelectedIndex = cboHosts.Items.Count - cboSubnets.SelectedIndex - 1;
generateSubnetBitMask(rtbSubnetBitMask, cboCIDRMaskBits.SelectedIndex +1, cboSubnetMaskBits.SelectedIndex, cboSubnetHostBits.SelectedIndex);
}
private void cboHosts_SelectedIndexChanged(object sender, EventArgs e)
{
cboSubnetMaskBits.SelectedIndex = cboSubnetMaskBits.Items.Count - cboHosts.SelectedIndex - 1;
cboSubnets.SelectedIndex = cboSubnets.Items.Count - cboHosts.SelectedIndex - 1;
cboSubnetMask.SelectedIndex = cboSubnetMask.Items.Count - cboHosts.SelectedIndex - 1;
cboSubnetHostBits.SelectedIndex = cboHosts.SelectedIndex;
if (cboHosts.SelectedIndex == 1)
linkRfcLink.Visible = true;
else
linkRfcLink.Visible = false;
generateSubnetBitMask(rtbSubnetBitMask, cboCIDRMaskBits.SelectedIndex + 1, cboSubnetMaskBits.SelectedIndex, cboSubnetHostBits.SelectedIndex);
}
private void linkRfcLink_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
System.Diagnostics.Process.Start("http://www.ietf.org/rfc/rfc3021.txt");
}
private void generateSubnetBitMask(RichTextBox RichTextBox, int maskBits, int subnetBits, int hostBits)
{
generateSubnetBitMask(RichTextBox, maskBits, subnetBits, hostBits, IPClasses.unknown);
}
private void generateSubnetBitMask(RichTextBox outputRichTextBox,int maskBits, int subnetBits, int hostBits, IPClasses IPClass)
{
if (maskBits + subnetBits + hostBits != 32)
return;
RichTextBox RichTextBox = new RichTextBox();
RichTextBox.Font = outputRichTextBox.Font;
string subnetBitMask = "";
int bitPos = 0;
int partStart = 0;
int partEnd = 0;
Dictionary<int[], Color> colorizing = new Dictionary<int[], Color>();
if (IPClass == IPClasses.A)
{
maskBits -= 1;
subnetBitMask += "0";
colorizing.Add(new int[] { 0,0},Color.Orange);
partStart = 1;
bitPos = 1;
}
else if (IPClass == IPClasses.B)
{
maskBits -= 2;
subnetBitMask += "10";
colorizing.Add(new int[] { 0, 1 }, Color.Orange);
partStart = 2;
bitPos = 2;
}
else if (IPClass == IPClasses.C)
{
maskBits -= 3;
subnetBitMask += "110";
colorizing.Add(new int[] { 0, 2 }, Color.Orange);
partStart = 3;
bitPos = 3;
}
if (IPClass == IPClasses.D)
{
RichTextBox.Text = "1110nnnn.nnnnnnnn.nnnnnnnn.nnnnnnnn";
colorizing.Add(new int[] { 0, 3 }, Color.Orange);
colorizing.Add(new int[] { 4, 34 }, Color.Blue);
colorizing.Add(new int[] { 8, 8 }, Color.Black);
colorizing.Add(new int[] { 17, 17 }, Color.Black);
colorizing.Add(new int[] { 26, 26 }, Color.Black);
}
else if (IPClass == IPClasses.E)
{
RichTextBox.Text = "1111XXXX.XXXXXXXX.XXXXXXXX.XXXXXXXX";
colorizing.Add(new int[] { 0, 3 }, Color.Orange);
colorizing.Add(new int[] { 4, 34 }, Color.Magenta);
colorizing.Add(new int[] { 8, 8 }, Color.Black);
colorizing.Add(new int[] { 17, 17 }, Color.Black);
colorizing.Add(new int[] { 26, 26 }, Color.Black);
}
else
{
for (int i = 0; i < maskBits; i++)
{
if (bitPos++ == 8)
{
partEnd = subnetBitMask.Length - 1;
colorizing.Add(new int[] { partStart, partEnd }, Color.Blue);
colorizing.Add(new int[] { partEnd + 1, partEnd + 1 }, Color.Black);
bitPos = 1;
subnetBitMask += ".";
partStart = subnetBitMask.Length;
}
subnetBitMask += "n";
}
partEnd = subnetBitMask.Length - 1;
colorizing.Add(new int[] { partStart, partEnd }, Color.Blue);
partStart = subnetBitMask.Length;
for (int i = 0; i < subnetBits; i++)
{
if (bitPos++ == 8)
{
partEnd = subnetBitMask.Length - 1;
if (partEnd >= partStart)
colorizing.Add(new int[] { partStart, partEnd }, Color.Red);
colorizing.Add(new int[] { partEnd + 1, partEnd + 1 }, Color.Black);
bitPos = 1;
subnetBitMask += ".";
partStart = subnetBitMask.Length;
}
subnetBitMask += "s";
}
if (subnetBits > 0)
{
partEnd = subnetBitMask.Length - 1;
colorizing.Add(new int[] { partStart, partEnd }, Color.Red);
partStart = subnetBitMask.Length;
}
for (int i = 0; i < hostBits; i++)
{
if (bitPos++ == 8)
{
partEnd = subnetBitMask.Length - 1;
if (partEnd >= partStart)
colorizing.Add(new int[] { partStart, partEnd }, Color.Green);
colorizing.Add(new int[] { partEnd + 1, partEnd + 1 }, Color.Black);
bitPos = 1;
subnetBitMask += ".";
partStart = subnetBitMask.Length;
}
subnetBitMask += "h";
}
if (hostBits > 0)
{
partEnd = subnetBitMask.Length - 1;
colorizing.Add(new int[] { partStart, partEnd }, Color.Green);
}
RichTextBox.Text = subnetBitMask;
Application.DoEvents();
}
foreach (KeyValuePair<int[], Color> part in colorizing)
{
RichTextBox.Select(part.Key[0], part.Key[1] - part.Key[0] +1 );
RichTextBox.SelectionColor = part.Value;
}
outputRichTextBox.Rtf = RichTextBox.Rtf;
}
private void btnGenerateSubnets_Click(object sender, EventArgs e)
{
btnGenerateSubnets.Enabled = false;
barProgress.Value = 0;
dgrSubnets.Visible = false;
DataTable tblSubnets = new DataTable();
dgrSubnets.DataSource = null;
Regex regex = new Regex(@"^([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])$");
if (!regex.IsMatch(txtIPAdd.Text))
{
MessageBox.Show("Address block contains no valid IP address", "No Valid Address Block", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
string[] temp = txtIPAdd.Text.Split(new char[] { '.' });
int[] IPAddress = new int[4];
for (int i = 0; i < 4; i++)
IPAddress[i] = Convert.ToInt32(temp[i]);
if (cboCIDRMask.SelectedIndex<0)
{
MessageBox.Show("CIDR mask contains no valid IP mask", "No Valid CIDR Mask", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
temp = cboCIDRMask.Text.Split(new char[] { '.' });
int[] CIDRMask = new int[4];
for (int i = 0; i < 4; i++)
CIDRMask[i] = Convert.ToInt32(temp[i]);
for (int i = 0; i < 4; i++)
IPAddress[i] = IPAddress[i] & CIDRMask[i];
int anzahlSubnets = (int)Math.Pow(2, cboSubnetMaskBits.SelectedIndex);
int subnetSize = (int)Math.Pow(2, cboSubnetHostBits.SelectedIndex);
dgrSubnets.DataSource = tblSubnets.DefaultView;
if (anzahlSubnets > 32766 && MessageBox.Show("There will be " + anzahlSubnets + " Subnets calculated. That may take some time.\r\nDo you still want to calculate the subnets?", "Big Amount of Subnets to Calculate", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation) == DialogResult.No)
{
barProgress.Visible = false;
dgrSubnets.Visible = true;
btnGenerateSubnets.Enabled = true;
return;
}
tblSubnets.Columns.Add("Subnet");
tblSubnets.Columns.Add("Mask");
tblSubnets.Columns.Add("Subnet Size");
tblSubnets.Columns.Add("Host Range");
tblSubnets.Columns.Add("Broadcast");
dgrSubnets.Columns[0].Width = 110;
dgrSubnets.Columns[1].Width = 110;
dgrSubnets.Columns[2].Width = 80;
int binaryAddress = 0;
foreach (int part in IPAddress)
{
binaryAddress <<= 8;
binaryAddress += part;
}
//Console.WriteLine(Convert.ToString(binaryAddress, 2));
barProgress.Maximum = anzahlSubnets;
barProgress.Visible = true;
for (int subnet = 0; subnet < anzahlSubnets; subnet++)
{
string subnetAddr = convertToIP(binaryAddress);
string hostSize = subnetSize.ToString();
if (subnetSize > 2)
hostSize = (subnetSize - 2).ToString();
string firstAddr = "";
string lastAddr = "";
if(subnetSize == 1)
{
firstAddr = convertToIP(binaryAddress);
lastAddr = convertToIP(binaryAddress);
}
else if (subnetSize == 2)
{
firstAddr = convertToIP(binaryAddress);
lastAddr = convertToIP(++binaryAddress);
}
else
{
firstAddr = convertToIP(++binaryAddress);
binaryAddress += subnetSize - 3;
lastAddr = convertToIP(binaryAddress);
}
string broadcast = "";
if (subnetSize < 4)
broadcast = convertToIP(binaryAddress);
else
broadcast= convertToIP(++binaryAddress);
tblSubnets.Rows.Add(new string[] { subnetAddr, cboSubnetMask.Text, hostSize, firstAddr + " to " + lastAddr , broadcast });
binaryAddress++;
barProgress.Value = subnet;
Application.DoEvents();
}
barProgress.Visible = false;
dgrSubnets.Visible = true;
btnGenerateSubnets.Enabled = true;
}
private string convertToIP(int binaryIP)
{
string output = (binaryIP & 255).ToString();
binaryIP >>= 8;
output = (binaryIP & 255) + "." + output;
binaryIP >>= 8;
output = (binaryIP & 255) + "." + output;
binaryIP >>= 8;
output = (binaryIP & 255) + "." + output;
return output;
}
private void cmdAddrGenerateAddresses_Click(object sender, EventArgs e)
{
cmdAddrGenerateAddresses.Enabled = false;
barAddrProgress.Value = 0;
dgrAddresses.Visible = false;
DataTable tblAddresses = new DataTable();
dgrAddresses.DataSource = null;
Regex regex = new Regex(@"^([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])$");
if (!regex.IsMatch(txtAddrIPAddress.Text))
{
MessageBox.Show("IP Address contains no valid IP address", "No Valid IP Address", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
string[] temp = txtAddrIPAddress.Text.Split(new char[] { '.' });
int[] IPAddress = new int[4];
for (int i = 0; i < 4; i++)
IPAddress[i] = Convert.ToInt32(temp[i]);
if (cboAddrMask.SelectedIndex < 0)
{
MessageBox.Show("Subnet mask contains no valid IP mask", "No Valid Subnet Mask", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
temp = cboAddrMask.Text.Split(new char[] { '.' });
int[] subnetMask = new int[4];
for (int i = 0; i < 4; i++)
subnetMask[i] = Convert.ToInt32(temp[i]);
for (int i = 0; i < 4; i++)
IPAddress[i] = IPAddress[i] & subnetMask[i];
int subnetSize = (int)Math.Pow(2, (32 - cboAddrMask.SelectedIndex - 1));
dgrAddresses.DataSource = tblAddresses.DefaultView;
if (subnetSize > 32766 && MessageBox.Show("There will be " + subnetSize + " Hosts displayed. That may take some time.\r\nDo you still want to display the hosts?", "Big Amount of Hosts to Display", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation) == DialogResult.No)
{
barAddrProgress.Visible = false;
dgrAddresses.Visible = true;
cmdAddrGenerateAddresses.Enabled = true;
return;
}
tblAddresses.Columns.Add("IP");
tblAddresses.Columns.Add("Mask");
tblAddresses.Columns.Add("Notes");
dgrAddresses.Columns[0].Width = 110;
dgrAddresses.Columns[1].Width = 110;
int binaryAddress = 0;
foreach (int part in IPAddress)
{
binaryAddress <<= 8;
binaryAddress += part;
}
//Console.WriteLine(Convert.ToString(binaryAddress, 2));
barAddrProgress.Maximum = subnetSize;
barAddrProgress.Visible = true;
for (int address = 0; address < subnetSize; address++)
{
string ipAddr = convertToIP(binaryAddress++);
string note = "";
if (subnetSize == 1)
note = "Single host address";
else if (address == 0)
note = "Subnet address";
else if (address == subnetSize - 1)
note = "Broadcast address";
else if ((ipAddr.EndsWith(".0") || ipAddr.EndsWith(".255")) && subnetSize > 2)
note = "Suggestion: Don't use due to numbering convention";
tblAddresses.Rows.Add(new string[] { ipAddr, cboAddrMask.Text, note });
barAddrProgress.Value = address;
Application.DoEvents();
}
barAddrProgress.Visible = false;
dgrAddresses.Visible = true;
cmdAddrGenerateAddresses.Enabled = true;
}
private void txtClassfullAddr_TextChanged(object sender, EventArgs e)
{
cboClassfullHostBits.Items.Clear();
cboClassfullHosts.Items.Clear();
cboClassfullMask.Items.Clear();
cboClassfullMaskBits.Items.Clear();
cboClassfullSubnets.Items.Clear();
rtbClassfullBitMask.Text = "";
if (findIPClass(txtClassfullAddr.Text) != IPClasses.unknown && findIPClass(txtClassfullAddr.Text) != IPClasses.E)
{
int hostBits = 0;
for (int maskBits = classfullSubnetBits[findIPClass(txtClassfullAddr.Text)]; maskBits <= 32; maskBits++)
{
int n = -1; //n = 32Bit set to 1
n <<= (32 - maskBits);
string subnet = (n & 255).ToString();
n >>= 8;
subnet = (n & 255) + "." + subnet;
n >>= 8;
subnet = (n & 255) + "." + subnet;
n >>= 8;
subnet = (n & 255) + "." + subnet;
cboClassfullMask.Items.Add(subnet);
cboClassfullMaskBits.Items.Add(maskBits.ToString());
cboClassfullSubnets.Items.Add(Math.Pow(2, hostBits).ToString());
double hostNumber = Math.Pow(2, hostBits);
if (hostNumber == 1)
cboClassfullHosts.Items.Add("1");
else if (hostNumber == 2)
cboClassfullHosts.Items.Add("2 (RFC3021)");
else
cboClassfullHosts.Items.Add((hostNumber - 2).ToString());
cboClassfullHostBits.Items.Add(hostBits++.ToString());
}
cboClassfullMask.SelectedIndex = 0;
cboClassfullMask_SelectedIndexChanged(cboClassfullMask, new EventArgs());
}
}
private enum IPClasses
{
A,
B,
C,
D,
E,
unknown
}
private IPClasses findIPClass(string IPAddress)
{
Regex regex = new Regex(@"^([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])$");
if (regex.IsMatch(IPAddress))
{
string[] temp = IPAddress.Split(new char[] { '.' });
int[] iIPAddress = new int[4];
for (int i = 0; i < 4; i++)
iIPAddress[i] = Convert.ToInt32(temp[i]);
int iBinaryAddress = 0;
foreach (int part in iIPAddress)
{
iBinaryAddress <<= 8;
iBinaryAddress += part;
}
string sBinaryAddress = Convert.ToString(iBinaryAddress, 2);
if (sBinaryAddress.Length < 32)
{
while(sBinaryAddress.Length < 32)
sBinaryAddress = "0" + sBinaryAddress;
}
if (sBinaryAddress.StartsWith("0"))
return IPClasses.A;
else if (sBinaryAddress.StartsWith("10"))
return IPClasses.B;
else if (sBinaryAddress.StartsWith("110"))
return IPClasses.C;
else if (sBinaryAddress.StartsWith("1110"))
return IPClasses.D;
else if (sBinaryAddress.StartsWith("1111"))
return IPClasses.E;
}
return IPClasses.unknown;
}
private void cboClassfullMask_SelectedIndexChanged(object sender, EventArgs e)
{
cboClassfullMaskBits.SelectedIndex = cboClassfullMask.SelectedIndex;
cboClassfullSubnets.SelectedIndex = cboClassfullMask.SelectedIndex;
cboClassfullHostBits.SelectedIndex = cboClassfullHostBits.Items.Count - cboClassfullMask.SelectedIndex - 1;
cboClassfullHosts.SelectedIndex = cboClassfullHosts.Items.Count - cboClassfullMask.SelectedIndex - 1;
generateSubnetBitMask(rtbClassfullBitMask, classfullSubnetBits[findIPClass(txtClassfullAddr.Text)], cboClassfullMaskBits.SelectedIndex, cboClassfullHostBits.SelectedIndex, findIPClass(txtClassfullAddr.Text));
}
private void cboClassfullMaskBits_SelectedIndexChanged(object sender, EventArgs e)
{
cboClassfullMask.SelectedIndex = cboClassfullMaskBits.SelectedIndex;
cboClassfullSubnets.SelectedIndex = cboClassfullMaskBits.SelectedIndex;
cboClassfullHostBits.SelectedIndex = cboClassfullHostBits.Items.Count - cboClassfullMaskBits.SelectedIndex - 1;
cboClassfullHosts.SelectedIndex = cboClassfullHosts.Items.Count - cboClassfullMaskBits.SelectedIndex - 1;
generateSubnetBitMask(rtbClassfullBitMask, classfullSubnetBits[findIPClass(txtClassfullAddr.Text)], cboClassfullMaskBits.SelectedIndex, cboClassfullHostBits.SelectedIndex, findIPClass(txtClassfullAddr.Text));
}
private void cboClassfullHostBits_SelectedIndexChanged(object sender, EventArgs e)
{
cboClassfullMaskBits.SelectedIndex = cboClassfullMaskBits.Items.Count - cboClassfullHostBits.SelectedIndex - 1;
cboClassfullSubnets.SelectedIndex = cboClassfullSubnets.Items.Count - cboClassfullHostBits.SelectedIndex - 1;
cboClassfullMask.SelectedIndex = cboClassfullMask.Items.Count - cboClassfullHostBits.SelectedIndex - 1;
cboClassfullHosts.SelectedIndex = cboClassfullHostBits.SelectedIndex;
generateSubnetBitMask(rtbClassfullBitMask, classfullSubnetBits[findIPClass(txtClassfullAddr.Text)], cboClassfullMaskBits.SelectedIndex, cboClassfullHostBits.SelectedIndex, findIPClass(txtClassfullAddr.Text));
}
private void cboClassfullSubnets_SelectedIndexChanged(object sender, EventArgs e)
{
cboClassfullMask.SelectedIndex = cboClassfullSubnets.SelectedIndex;
cboClassfullMaskBits.SelectedIndex = cboClassfullSubnets.SelectedIndex;
cboClassfullHostBits.SelectedIndex = cboClassfullHostBits.Items.Count - cboClassfullSubnets.SelectedIndex - 1;
cboClassfullHosts.SelectedIndex = cboClassfullHosts.Items.Count - cboClassfullSubnets.SelectedIndex - 1;
generateSubnetBitMask(rtbClassfullBitMask, classfullSubnetBits[findIPClass(txtClassfullAddr.Text)], cboClassfullMaskBits.SelectedIndex, cboClassfullHostBits.SelectedIndex, findIPClass(txtClassfullAddr.Text));
}
private void cboClassfullHosts_SelectedIndexChanged(object sender, EventArgs e)
{
cboClassfullMaskBits.SelectedIndex = cboClassfullMaskBits.Items.Count - cboClassfullHosts.SelectedIndex - 1;
cboClassfullSubnets.SelectedIndex = cboClassfullSubnets.Items.Count - cboClassfullHosts.SelectedIndex - 1;
cboClassfullMask.SelectedIndex = cboClassfullMask.Items.Count - cboClassfullHosts.SelectedIndex - 1;
cboClassfullHostBits.SelectedIndex = cboClassfullHosts.SelectedIndex;
if (cboClassfullHosts.SelectedIndex == 1)
lklClassfullRFC.Visible = true;
else
lklClassfullRFC.Visible = false;
generateSubnetBitMask(rtbClassfullBitMask, classfullSubnetBits[findIPClass(txtClassfullAddr.Text)], cboClassfullMaskBits.SelectedIndex, cboClassfullHostBits.SelectedIndex, findIPClass(txtClassfullAddr.Text));
}
private void cmdClassfullCalculate_Click(object sender, EventArgs e)
{
cmdClassfullCalculate.Enabled = false;
barClassfullProgress.Value = 0;
dgrClassfullSubnets.Visible = false;
DataTable tblSubnets = new DataTable();
dgrClassfullSubnets.DataSource = null;
Regex regex = new Regex(@"^([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])$");
if (!regex.IsMatch(txtClassfullAddr.Text))
{
MessageBox.Show("Address block contains no valid IP address", "No Valid Address Block", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
string[] temp = txtClassfullAddr.Text.Split(new char[] { '.' });
int[] IPAddress = new int[4];
for (int i = 0; i < 4; i++)
IPAddress[i] = Convert.ToInt32(temp[i]);
if (cboClassfullMask.SelectedIndex < 0)
{
MessageBox.Show("CIDR mask contains no valid IP mask", "No Valid CIDR Mask", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
temp = cboClassfullMask.Text.Split(new char[] { '.' });
int[] ClassfullMask = new int[4];
for (int i = 0; i < 4; i++)
ClassfullMask[i] = Convert.ToInt32(temp[i]);
for (int i = 0; i < 4; i++)
IPAddress[i] = IPAddress[i] & ClassfullMask[i];
int anzahlSubnets = (int)Math.Pow(2, cboClassfullMaskBits.SelectedIndex);
int subnetSize = (int)Math.Pow(2, cboClassfullHostBits.SelectedIndex);
dgrClassfullSubnets.DataSource = tblSubnets.DefaultView;
if (anzahlSubnets > 32766 && MessageBox.Show("There will be " + anzahlSubnets + " Subnets calculated. That may take some time.\r\nDo you still want to calculate the subnets?", "Big Amount of Subnets to Calculate", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation) == DialogResult.No)
{
barClassfullProgress.Visible = false;
dgrClassfullSubnets.Visible = true;
cmdClassfullCalculate.Enabled = true;
return;
}
tblSubnets.Columns.Add("Subnet");
tblSubnets.Columns.Add("Mask");
tblSubnets.Columns.Add("Subnet Size");
tblSubnets.Columns.Add("Host Range");
tblSubnets.Columns.Add("Broadcast");
dgrClassfullSubnets.Columns[0].Width = 110;
dgrClassfullSubnets.Columns[1].Width = 110;
dgrClassfullSubnets.Columns[2].Width = 80;
int binaryAddress = 0;
foreach (int part in IPAddress)
{
binaryAddress <<= 8;
binaryAddress += part;
}
//Console.WriteLine(Convert.ToString(binaryAddress, 2));
barClassfullProgress.Maximum = anzahlSubnets;
barClassfullProgress.Visible = true;
for (int subnet = 0; subnet < anzahlSubnets; subnet++)
{
string subnetAddr = convertToIP(binaryAddress);
string hostSize = subnetSize.ToString();
if (subnetSize > 2)
hostSize = (subnetSize - 2).ToString();
string firstAddr = "";
string lastAddr = "";
if (subnetSize == 1)
{
firstAddr = convertToIP(binaryAddress);
lastAddr = convertToIP(binaryAddress);
}
else if (subnetSize == 2)
{
firstAddr = convertToIP(binaryAddress);
lastAddr = convertToIP(++binaryAddress);
}
else
{
firstAddr = convertToIP(++binaryAddress);
binaryAddress += subnetSize - 3;
lastAddr = convertToIP(binaryAddress);
}
string broadcast = "";
if (subnetSize < 4)
broadcast = convertToIP(binaryAddress);
else
broadcast = convertToIP(++binaryAddress);
tblSubnets.Rows.Add(new string[] { subnetAddr, cboClassfullMask.Text, hostSize, firstAddr + " to " + lastAddr, broadcast });
binaryAddress++;
barClassfullProgress.Value = subnet;
Application.DoEvents();
}
barClassfullProgress.Visible = false;
dgrClassfullSubnets.Visible = true;
cmdClassfullCalculate.Enabled = true;
}
private void dgrClassfullSubnets_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
txtAddrIPAddress.Text = dgrClassfullSubnets.Rows[e.RowIndex].Cells[0].Value.ToString();
cboAddrMask.Text = dgrClassfullSubnets.Rows[e.RowIndex].Cells[1].Value.ToString();
tabAuswahl.SelectedTab = tabAddrs;
cmdAddrGenerateAddresses_Click(cmdAddrGenerateAddresses, new EventArgs());
}
private void dgrSubnets_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
txtAddrIPAddress.Text = dgrSubnets.Rows[e.RowIndex].Cells[0].Value.ToString();
cboAddrMask.Text = dgrSubnets.Rows[e.RowIndex].Cells[1].Value.ToString();
tabAuswahl.SelectedTab = tabAddrs;
cmdAddrGenerateAddresses_Click(cmdAddrGenerateAddresses, new EventArgs());
}
private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
System.Diagnostics.Process.Start("mailto:[email protected]");
}
private DateTime startResolve;
private IAsyncResult resolveResult;
private void cmdLookupIP_Click(object sender, EventArgs e)
{
cmdLookupHostname.Enabled = false;
cmdLookupIP.Enabled = false;
chkWhoisLookup.Enabled = false;
txtLookupIP.Text = "";
txtHex.Text = "";
txtBin.Text = "";
txtDetails.Text = "";
txtResponse.Text = "";
startResolve = DateTime.Now;
try
{
resolveResult = Dns.BeginGetHostAddresses(txtLookupHostname.Text, new AsyncCallback(hostnameLookupCallback), txtLookupHostname);
trmResponseTimeout.Start();
}
catch(ArgumentNullException)
{
txtResponse.Text = "Resolve not possible: No Hostname address given for lookup!";
updateLookup();
}
catch (ArgumentOutOfRangeException)
{
txtResponse.Text = "Resolve not possible: Given Hostname is longer than 255 characters!";
updateLookup();
}
catch (ArgumentException)
{
txtResponse.Text = "Resolve not possible: Given IP address is not a valid IPv4 address!";
updateLookup();
}
catch (Exception exception)
{
txtResponse.Text = "Resolve not possible because exception occured: " + exception.Message + "\r\n" + exception.StackTrace;
updateLookup();
}
}
private void cmdLookupHostname_Click(object sender, EventArgs e)
{
cmdLookupHostname.Enabled = false;
cmdLookupIP.Enabled = false;
chkWhoisLookup.Enabled = false;
txtLookupHostname.Text = "";
txtHex.Text = "";
txtBin.Text = "";
txtDetails.Text = "";
txtResponse.Text = "";
startResolve = DateTime.Now;
try
{
resolveResult = Dns.BeginGetHostEntry(new IPAddress(ipStringToByteArray(txtLookupIP.Text)), new AsyncCallback(ipLookupCallback), txtLookupHostname);
trmResponseTimeout.Start();
}
catch (ArgumentNullException)
{
txtResponse.Text = "Resolve not possible: No IPv4 address given for lookup!";
updateLookup();
}
catch (ArgumentOutOfRangeException)
{
txtResponse.Text = "Resolve not possible: Given Hostname is longer than 255 characters!";
updateLookup();
}
catch (ArgumentException)
{
txtResponse.Text = "Resolve not possible: Given IP address is not a valid IPv4 address!";
updateLookup();
}
catch (Exception exception)
{
txtResponse.Text = "Resolve not possible because exception occured: " + exception.Message + "\r\n" + exception.StackTrace;
updateLookup();
}
}
private void hostnameLookupCallback(IAsyncResult result)
{
try
{
IPAddress[] addressList = Dns.EndGetHostAddresses(result);
if(addressList.Length == 0)
{
setTxtResponseError("Lookup responded no IP address.");
}
foreach (var address in addressList)
{
if (address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
setTxtLookupIP(address.ToString());
return;
}
}
setTxtResponseError("Lookup responded no IPv4 address.");
}
catch
{
setTxtResponseError("Lookup not successfull");
}
}
private void ipLookupCallback(IAsyncResult result)
{
try
{
IPHostEntry hostEntry = Dns.EndGetHostEntry(result);
setTxtLookupHostname(hostEntry.HostName);
}
catch
{
setTxtResponseError("Lookup not successfull");
}
}
private void setTxtLookupIP(string text)
{
// InvokeRequired required compares the thread ID of the
// calling thread to the thread ID of the creating thread.
// If these threads are different, it returns true.
if (this.txtLookupIP.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(setTxtLookupIP);
this.Invoke(d, new object[] { text });
}
else
{
DateTime endTime = DateTime.Now;
TimeSpan resolveTime = endTime.Subtract(startResolve);
this.txtLookupIP.Text = text;
this.txtResponse.Text = resolveTime.Milliseconds + " Milliseconds";
updateLookup();
}
}
private void setTxtLookupHostname(string text)
{
// InvokeRequired required compares the thread ID of the
// calling thread to the thread ID of the creating thread.
// If these threads are different, it returns true.
if (this.txtLookupIP.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(setTxtLookupHostname);
this.Invoke(d, new object[] { text });
}
else
{
DateTime endTime = DateTime.Now;
TimeSpan resolveTime = endTime.Subtract(startResolve);
this.txtLookupHostname.Text = text;
this.txtResponse.Text = resolveTime.Milliseconds + " Milliseconds";
updateLookup();
}
}
private void setTxtResponseError(string text)
{
// InvokeRequired required compares the thread ID of the
// calling thread to the thread ID of the creating thread.
// If these threads are different, it returns true.
if (this.txtLookupIP.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(setTxtResponseError);
this.Invoke(d, new object[] { text });
}
else
{
this.txtResponse.Text = text;
updateLookup();
}
}
private byte[] ipStringToByteArray(string IPAddress)
{
byte[] output = new byte[0];
Regex regex = new Regex(@"^([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])$");
if (regex.IsMatch(IPAddress))
{
output = new byte[4];
string[] temp = IPAddress.Split(new char[] { '.' });
for (int i = 0; i < 4; i++)
output[i] = Convert.ToByte(temp[i]);
}
return output;
}
private void updateLookup()
{
byte[] ipAddress = ipStringToByteArray(txtLookupIP.Text);
txtBin.Text = "";
txtHex.Text = "";
txtDetails.Text = "";
if (ipAddress.Length == 4)
{
foreach (byte part in ipAddress)
{
string temp = Convert.ToString(part, 2);
while (temp.Length < 8)
temp = "0" + temp;
txtBin.Text += temp + ".";
temp = Convert.ToString(part, 16);
while (temp.Length < 2)
temp = "0" + temp;
txtHex.Text += temp + ".";
}
txtBin.Text = txtLookupIP.Text + " = " + txtBin.Text.Substring(0, 35);
txtHex.Text = txtLookupIP.Text + " = " + txtHex.Text.Substring(0, 11).ToUpper();
RichTextBox tempRTB = new RichTextBox();
generateSubnetBitMask(tempRTB, classfullSubnetBits[findIPClass(txtLookupIP.Text)], 0, 32 - classfullSubnetBits[findIPClass(txtLookupIP.Text)], findIPClass(txtLookupIP.Text));
if (findIPClass(txtLookupIP.Text) != IPClasses.unknown)
txtDetails.Text = "IP Class \"" + findIPClass(txtLookupIP.Text) + "\"\r\n";
else
txtDetails.Text = "Unknown IP range\r\n";
txtDetails.Text += tempRTB.Text;
if (findIPClass(txtLookupIP.Text) == IPClasses.D)
txtDetails.Text += "\r\nMulticast addresses";
if (findIPClass(txtLookupIP.Text) == IPClasses.E)
txtDetails.Text += "\r\nReserved address range for special purposes";
if(descibePrivateIPRange(txtLookupIP.Text) != "")
txtDetails.Text += "\r\n" + descibePrivateIPRange(txtLookupIP.Text);
}
if(chkWhoisLookup.Checked)
{
if(txtLookupHostname.Text != string.Empty)
{
txtDetails.Text += WhoIs(txtLookupHostname.Text);
}
else if (txtLookupIP.Text != string.Empty)
{
txtDetails.Text += WhoIs(txtLookupIP.Text);
}
}
cmdLookupHostname.Enabled = true;
cmdLookupIP.Enabled = true;
chkWhoisLookup.Enabled = true;
trmResponseTimeout.Stop();
}
public string WhoIs(string address)
{
return WhoIs(address, "whois.iana.org");
}
public string WhoIs(string address, string server)
{
Regex findRefer = new Regex(@"^refer:(\s*)(.*)$", RegexOptions.Multiline);
StringBuilder response = new StringBuilder();
response.Append("\r\n\r\n======= WHOIS (" + server + ")=======\r\n\r\n");
if (server == null || server == string.Empty)
return null;
if (server == "whois.denic.de")
address = "-T dn,ace " + address;
int port = 43;
using (var client = new TcpClient(server, port))
{
using (var clientStream = client.GetStream())
{
using (var buffer = new BufferedStream(clientStream))
{
var streamWriter = new StreamWriter(buffer);
streamWriter.WriteLine(address);
streamWriter.Flush();
var streamReader = new StreamReader(buffer);
response.Append(streamReader.ReadToEnd());
}
clientStream.Close();
clientStream.Dispose();
}
client.Close();
}
if(findRefer.IsMatch(response.ToString()))
{
Match referMatch = findRefer.Match(response.ToString());
if (referMatch.Groups.Count >= 3)
{
string referServer = findRefer.Match(response.ToString()).Groups[2].Value;
response.Insert(0,WhoIs(address, referServer));
}
}
return response.ToString();
}
private void trmResponseTimeout_Tick(object sender, EventArgs e)
{
//Console.WriteLine(resolveResult.AsyncState.ToString());
if (!resolveResult.IsCompleted)
{
if (resolveResult.AsyncState == txtLookupHostname)
{
Dns.EndGetHostAddresses(resolveResult);