private bool GetDataLength(IntPtr connId, ref int reallength)
{
IntPtr bufferPtr = Marshal.AllocHGlobal(7);
try
{
//Peek从数据包中窥视数据，不会影响缓存数据的大小
if (_server.Peek(connId, bufferPtr, 7) == FetchResult.Ok)
{
byte[] bufferBytes = new byte[7];
Marshal.Copy(bufferPtr, bufferBytes, 0, 7);
byte[] len = new byte[4];
Array.Copy(bufferBytes, 2, len, 0, 4);
int lens = BitConverter.ToInt32(len, 0);
reallength = lens;
return(true);
}
else
{
return(false);
}
}
catch (Exception ex)
{
return(false);
}
finally
{
Marshal.FreeHGlobal(bufferPtr);//释放申请的内存空间
}
}