RaspberryIO/Unosquare.Swan/Extensions.Network.cs

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2019-02-17 14:08:57 +01:00
namespace Unosquare.Swan
{
using System;
using System.Linq;
using System.Net;
using System.Net.Sockets;
/// <summary>
/// Provides various extension methods for networking-related tasks.
/// </summary>
public static class NetworkExtensions
{
/// <summary>
/// Determines whether the IP address is private.
/// </summary>
/// <param name="address">The IP address.</param>
/// <returns>
/// True if the IP Address is private; otherwise, false.
/// </returns>
/// <exception cref="ArgumentNullException">address.</exception>
public static bool IsPrivateAddress(this IPAddress address)
{
if (address == null)
throw new ArgumentNullException(nameof(address));
var octets = address.ToString().Split(new[] { "." }, StringSplitOptions.RemoveEmptyEntries).Select(byte.Parse).ToArray();
var is24Bit = octets[0] == 10;
var is20Bit = octets[0] == 172 && (octets[1] >= 16 && octets[1] <= 31);
var is16Bit = octets[0] == 192 && octets[1] == 168;
return is24Bit || is20Bit || is16Bit;
}
/// <summary>
/// Converts an IPv4 Address to its Unsigned, 32-bit integer representation.
/// </summary>
/// <param name="address">The address.</param>
/// <returns>
/// A 32-bit unsigned integer converted from four bytes at a specified position in a byte array.
/// </returns>
/// <exception cref="ArgumentNullException">address.</exception>
/// <exception cref="ArgumentException">InterNetwork - address.</exception>
public static uint ToUInt32(this IPAddress address)
{
if (address == null)
throw new ArgumentNullException(nameof(address));
if (address.AddressFamily != AddressFamily.InterNetwork)
throw new ArgumentException($"Address has to be of family '{nameof(AddressFamily.InterNetwork)}'", nameof(address));
var addressBytes = address.GetAddressBytes();
if (BitConverter.IsLittleEndian)
Array.Reverse(addressBytes);
return BitConverter.ToUInt32(addressBytes, 0);
}
}
}