53 lines
1.3 KiB
C#
53 lines
1.3 KiB
C#
namespace System.Net
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{
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/// <summary>
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/// Provides extension methods for <see cref="IPAddress"/>es.
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/// </summary>
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public static class IPAddressExtensions
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{
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/// <summary>
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/// Increments the <see cref="IPAddress"/> by one and returns a new instance.
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/// </summary>
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/// <param name="address">The <see cref="IPAddress"/> to increment.</param>
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public static IPAddress Increment(this IPAddress address)
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{
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byte[] bytes = address.GetAddressBytes();
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int bytePos = bytes.Length - 1;
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while (bytes[bytePos] == byte.MaxValue)
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{
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bytes[bytePos] = 0;
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bytePos--;
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if (bytePos < 0)
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return new IPAddress(bytes);
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}
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bytes[bytePos]++;
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return new IPAddress(bytes);
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}
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/// <summary>
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/// Decrements the <see cref="IPAddress"/> by one and returns a new instance.
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/// </summary>
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/// <param name="address">The <see cref="IPAddress"/> to decrement.</param>
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public static IPAddress Decrement(this IPAddress address)
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{
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byte[] bytes = address.GetAddressBytes();
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int bytePos = bytes.Length - 1;
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while (bytes[bytePos] == 0)
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{
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bytes[bytePos] = byte.MaxValue;
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bytePos--;
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if (bytePos < 0)
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return new IPAddress(bytes);
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}
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bytes[bytePos]--;
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return new IPAddress(bytes);
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}
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}
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}
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