[英]How to convert IntPtr/Int to Socket?
我想將message.WParam轉換為Socket。
protected override void WndProc(ref Message m)
{
if (m.Msg == Values.MESSAGE_ASYNC)
{
switch (m.LParam.ToInt32())
{
case Values.FD_READ:
WS2.Receive(m.WParam);
case Values.FD_WRITE: break;
default: break;
}
}
else
{
base.WndProc(ref m);
}
}
public class WS2
{
public static void Receive(IntPtr sock)
{
Socket socket = sock;
}
}
如何將IntrPtr(sock)轉換為Socket,以便我可以調用Receive()?
你不能這樣做,因為Socket類創建並管理自己的私有套接字句柄。 從理論上講,你可以使用一些邪惡的反射來將你的套接字句柄裝入一個Socket的私有字段,但這是一個徹頭徹尾的黑客,我不會這樣做。
給定一個有效的套接字句柄,您可以通過P / Invoke調用Win32 recv函數來接收數據,如下所示:
[DllImport("ws2_32.dll")]
extern static int recv([In] IntPtr socketHandle, [In] IntPtr buffer,
[In] int count, [In] SocketFlags socketFlags);
/// <summary>
/// Receives data from a socket.
/// </summary>
/// <param name="socketHandle">The socket handle.</param>
/// <param name="buffer">The buffer to receive.</param>
/// <param name="offset">The offset within the buffer.</param>
/// <param name="size">The number of bytes to receive.</param>
/// <param name="socketFlags">The socket flags.</param>
/// <exception cref="ArgumentException">If <paramref name="socketHandle"/>
/// is zero.</exception>
/// <exception cref="ArgumentNullException">If <paramref name="buffer"/>
/// is null.</exception>
/// <exception cref="ArgumentOutOfRangeException">If the
/// <paramref name="offset"/> and <paramref name="size"/> specify a range
/// outside the given buffer.</exception>
public static int Receive(IntPtr socketHandle, byte[] buffer, int offset,
int size, SocketFlags socketFlags)
{
if (socketHandle == IntPtr.Zero)
throw new ArgumentException("socket");
if (buffer == null)
throw new ArgumentNullException("buffer");
if (offset < 0 || offset >= buffer.Length)
throw new ArgumentOutOfRangeException("offset");
if (size < 0 || offset + size > buffer.Length)
throw new ArgumentOutOfRangeException("size");
unsafe
{
fixed (byte* pData = buffer)
{
return Recv(socketHandle, new IntPtr(pData + offset),
size, socketFlags);
}
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.