//Metoda, ki namenjena preverjanju vnosa XXX.XXX.XXX.XXX in YYY.YYY.YYY.YYY
public static bool ParseWithIPv4Subnet(string ipInput, out IPAddress ipAddress, out IPAddress subnetMask)
{
//Preverjanje, če je naslov neveljaven
if (!IPAddress.TryParse(ipInput, out ipAddress) ||
ipAddress.AddressFamily != AddressFamily.InterNetwork)
{
WriteLine("Input is invalid IPv4 address.");
ipAddress = subnetMask = null;
return(false);
}
WriteLine("Enter valid IPv4 subnet mask:");
string input = ReadLine();
//Preverjanje, če je maska veljavna
if (input != null &&
IPAddress.TryParse(input, out subnetMask) &&
ipAddress.AddressFamily == AddressFamily.InterNetwork &&
SubnetMask.IsValid(subnetMask))
{
return(true);
}
WriteLine("Input is invalid IPv4 subnet mask.");
ipAddress = subnetMask = null;
return(false);
}
/// <summary>
/// Metoda namenjena preverjanju vnosa XXX.XXX.XXX.XXX/YY
/// </summary>
/// <param name="parts">deli vhodnega niza</param>
/// <param name="ipAddress">izhodni ip naslov</param>
/// <param name="subnetMask">izhodna maska</param>
/// <returns>rezultat preverjanja veljavnosti</returns>
public static bool ParseWithCIDR(string[] parts, out IPAddress ipAddress, out IPAddress subnetMask)
{
ipAddress = null;
subnetMask = null;
//Preverimo, če je smo dobili 2 dela
if (parts.Length != 2)
{
return(false);
}
//Preverimo veljavnost IP naslova
if (!IPAddress.TryParse(parts[0], out ipAddress) ||
ipAddress.AddressFamily != AddressFamily.InterNetwork)
{
WriteLine("Input is invalid IPv4 address.");
ipAddress = null;
return(false);
}
//Preverimo veljavnost CIDR pripone
int cidr;
if (!int.TryParse(parts[1], out cidr) ||
!Enumerable.Range(0, 32 + 1).Contains(cidr))
{
WriteLine("Input is invalid CIDR extension.");
return(false);
}
subnetMask = SubnetMask.CreateByNetBitLength(cidr);
return(true);
}
//Izpišemo masko podmrežja v obeh oblikah.
public static void WriteNetmask(IPAddress subnetMask)
{
Write("Netmask: ".PadRight(RightPadding));
ForegroundColor = Blue;
string netMask = $"{subnetMask} = {SubnetMask.GetNetBitLength(subnetMask)}";
Write(netMask.PadRight(RightPadding));
ForegroundColor = Red;
SetCursorPosition(ThirdRow, CursorTop);
Write(subnetMask.ToBinary());
ResetColor();
WriteLine();
}
//Oblikujemo izhod programa
static void WriteMainOutput(IPAddress ipAddress, IPAddress subnetMask)
{
WriteLine("Input interpreted as:");
WriteStandardFormat("Address: ", ipAddress);
WriteNetmask(subnetMask);
WriteStandardFormat("Wildcard: ", SubnetMask.GetWildCard(subnetMask));
WriteLine();
WriteLine("=>");
WriteLine();
WriteNetwork(ipAddress, subnetMask);
WriteStandardFormat("Broadcast: ", ipAddress.GetBroadcastAddress(subnetMask));
IPAddress hostMin = ipAddress.GetNetworkAddress(subnetMask).Increment(),
hostMax = ipAddress.GetBroadcastAddress(subnetMask).Decrement();
WriteStandardFormat("HostMin: ", hostMin);
WriteStandardFormat("HostMax: ", hostMax);
WriteAvailableHosts(subnetMask, ipAddress);
}
//Oblikujemo izpis za omrežje, kjer so dodatno obrvani prvi biti glede na razred IP naslova.
public static void WriteNetwork(IPAddress ipAddress, IPAddress subnetMask)
{
var networkAddress = ipAddress.GetNetworkAddress(subnetMask);
var ipClass = networkAddress.GetClass();
Write("Network: ".PadRight(RightPadding));
ForegroundColor = Blue;
string network = $"{networkAddress}/{SubnetMask.GetNetBitLength(subnetMask)}";
Write(network.PadRight(RightPadding));
ForegroundColor = DarkGray;
int numOfColoredBits = (int)ipClass + 1;
if (numOfColoredBits == 5)
{
numOfColoredBits--;
}
SetCursorPosition(ThirdRow, CursorTop);
if (ipClass > IPClass.Undefined && ipClass < IPClass.Invalid)
{
WriteWithColoredStartChars(networkAddress.ToBinary(), numOfColoredBits);
}
else
{
Write(networkAddress.ToBinary());
}
Write(" (");
ForegroundColor = Green;
if (ipClass > IPClass.Undefined && ipClass < IPClass.Invalid)
{
Write($"Class {ipClass}");
}
else
{
Write(ipClass);
}
ForegroundColor = DarkGray;
Write(")");
ResetColor();
WriteLine();
}
//Izpišemo koliko uporabnih naslovov je na voljo in še ali omrežje spada med nejavne naslove.
public static void WriteAvailableHosts(IPAddress subnetMask, IPAddress ipAddress)
{
Write("Hosts/Net: ".PadRight(RightPadding));
ForegroundColor = Blue;
Write($"{SubnetMask.NumberOfUsableHosts(subnetMask)}".PadRight(RightPadding));
ForegroundColor = DarkBlue;
string specialOutput = "";
if (ipAddress.IsPrivate())
{
specialOutput = "(Private Internet)";
}
else if (ipAddress.Equals(IPAddress.Loopback))
{
specialOutput = "(LOCALHOST)";
}
SetCursorPosition(ThirdRow, CursorTop);
Write(specialOutput);
ResetColor();
WriteLine();
}