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