public static extern NtStatus NtAlpcQueryInformationMessage(
SafeKernelObjectHandle PortHandle,
AlpcPortMessage PortMessage,
AlpcMessageInformationClass MessageInformationClass,
IntPtr MessageInformation,
int Length,
IntPtr ReturnLength
);
/// <summary>
/// Query a fixed structure from the object.
/// </summary>
/// <typeparam name="T">The type of structure to return.</typeparam>
/// <param name="info_class">The information class to query.</param>
/// <param name="port">The port which has processed the message.</param>
/// <param name="default_value">A default value for the query.</param>
/// <param name="throw_on_error">True to throw on error.</param>
/// <returns>The result of the query.</returns>
/// <exception cref="NtException">Thrown on error.</exception>
public NtResult <T> Query <T>(NtAlpc port, AlpcMessageInformationClass info_class,
T default_value, bool throw_on_error) where T : new()
{
using (var buffer = new SafeStructureInOutBuffer <T>(default_value)) {
return(QueryInformation(port, info_class,
buffer, out int return_length).CreateResult(throw_on_error, () => buffer.Result));
}
}
/// <summary>
/// Method to query information for a message.
/// </summary>
/// <param name="info_class">The information class.</param>
/// <param name="port">The port which has processed the message.</param>
/// <param name="buffer">The buffer to return data in.</param>
/// <param name="return_length">Return length from the query.</param>
/// <returns>The NT status code for the query.</returns>
public NtStatus QueryInformation(NtAlpc port, AlpcMessageInformationClass info_class,
SafeBuffer buffer, out int return_length)
{
if (_port == null)
{
throw new ArgumentNullException("Message must be associated with a port");
}
return(NtSystemCalls.NtAlpcQueryInformationMessage(port.Handle, Header,
info_class, buffer, buffer.GetLength(), out return_length));
}
/// <summary>
/// Query a fixed structure from the object.
/// </summary>
/// <typeparam name="T">The type of structure to return.</typeparam>
/// <param name="port">The port which has processed the message.</param>
/// <param name="info_class">The information class to query.</param>
/// <returns>The result of the query.</returns>
/// <exception cref="NtException">Thrown on error.</exception>
public T Query <T>(NtAlpc port, AlpcMessageInformationClass info_class) where T : new()
{
return(Query(port, info_class, new T()));
}
/// <summary>
/// Query a fixed structure from the object.
/// </summary>
/// <typeparam name="T">The type of structure to return.</typeparam>
/// <param name="port">The port which has processed the message.</param>
/// <param name="info_class">The information class to query.</param>
/// <param name="default_value">A default value for the query.</param>
/// <returns>The result of the query.</returns>
/// <exception cref="NtException">Thrown on error.</exception>
public T Query <T>(NtAlpc port, AlpcMessageInformationClass info_class, T default_value) where T : new()
{
return(Query(port, info_class, default_value, true).Result);
}
