using System;
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using System.Net.Sockets;
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using System.Runtime.InteropServices;
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namespace Microsoft.Win32
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{
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/// <summary>
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/// Ws2_32扩展
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/// </summary>
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public static partial class Util
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{
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/// <summary>
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/// 获取扩展函数指针
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/// </summary>
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/// <param name="guid">扩展函数标识</param>
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/// <param name="type">函数类型</param>
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/// <param name="socket">socket 指针</param>
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/// <returns>函数指针</returns>
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public static Delegate SioGetExtensionFunctionPointer(Guid guid, Type type, IntPtr socket)
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{
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IntPtr funPointer = IntPtr.Zero;
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int byteTransfered = 0;
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SocketError nErrorCode = UnsafeNativeMethods.WSAIoctl(socket, NativeMethods.SIO_GET_EXTENSION_FUNCTION_POINTER, ref guid, Marshal.SizeOf(guid), ref funPointer, IntPtr.Size, out byteTransfered, NativeMethods.NULL, NativeMethods.NULL);
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if (nErrorCode != SocketError.Success)
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throw new SocketException((int)nErrorCode);
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return Marshal.GetDelegateForFunctionPointer(funPointer, type);
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}
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}
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}
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