/// <summary>
/// Clones the specified <see cref="source" />.
/// </summary>
/// <param name="source">The source.</param>
/// <returns><see cref="Native.NdisApi.ETH_M_REQUEST" />.</returns>
public Native.NdisApi.ETH_M_REQUEST CloneEthMRequest(ref Native.NdisApi.ETH_M_REQUEST source)
{
var destination = CreateEthMRequest();
CloneEthMRequest(ref source, ref destination);
return(destination);
}
/// <summary>
/// Disposes the specified object.
/// </summary>
/// <param name="obj">The object.</param>
public void DisposeObject(Native.NdisApi.ETH_M_REQUEST obj)
{
foreach (var packet in obj._ethPacket)
{
_pinnedManagedArrayAllocator.FreeArray(packet._buffer);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="NdisApi" /> class.
/// </summary>
/// <param name="handle">The filter driver handle.</param>
protected NdisApi(SafeFilterDriverHandle handle)
{
Handle = handle;
_ndisApiHelper = new NdisApiHelper();
_ethPacketsToMstcp = _ndisApiHelper.CreateEthMRequest();
_ethPacketsToAdapter = _ndisApiHelper.CreateEthMRequest();
}
/// <summary>
/// Zeroes the specified request.
/// </summary>
/// <param name="request">The request.</param>
public void ZeroEthMRequest(ref Native.NdisApi.ETH_M_REQUEST request)
{
request.hAdapterHandle = IntPtr.Zero;
for (int i = 0; i < request.dwPacketsNumber; i++)
{
Kernel32.ZeroMemory(request._ethPacket[i]._buffer, Native.NdisApi.IntermediateBufferSize);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="NdisApi" /> class.
/// </summary>
/// <param name="handle">The filter driver handle.</param>
/// <param name="driverNameBytes">The driver name bytes.</param>
protected NdisApi(SafeFilterDriverHandle handle, byte[] driverNameBytes)
{
_driverNameBytes = driverNameBytes;
Handle = handle;
_ndisApiHelper = new NdisApiHelper();
_ethPacketsToMstcp = _ndisApiHelper.CreateEthMRequest();
_ethPacketsToAdapter = _ndisApiHelper.CreateEthMRequest();
}
/// <summary>
/// Clones the specified request.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="destination">The destination.</param>
public void CloneEthMRequest(ref Native.NdisApi.ETH_M_REQUEST source, ref Native.NdisApi.ETH_M_REQUEST destination)
{
destination.hAdapterHandle = source.hAdapterHandle;
destination.dwPacketsSuccess = source.dwPacketsSuccess;
destination.dwPacketsNumber = source.dwPacketsNumber;
for (int i = 0; i < source.dwPacketsSuccess; i++)
{
Kernel32.CopyMemory(destination._ethPacket[i]._buffer, source._ethPacket[i]._buffer, (uint)Native.NdisApi.IntermediateBufferSize);
}
}
/// <summary>
/// Sends the packets to MSTCP or adapter.
/// </summary>
/// <param name="ethMRequest">The ether multiple request.</param>
/// <returns><c>true</c> if successful, <c>false</c> otherwise.</returns>
public bool SendPackets(ref Native.NdisApi.ETH_M_REQUEST ethMRequest)
{
lock (_lock)
{
if (ethMRequest.dwPacketsSuccess == 0)
{
return(true);
}
_ethPacketsToAdapter.dwPacketsSuccess = 0;
_ethPacketsToMstcp.dwPacketsSuccess = 0;
_ethPacketsToAdapter.dwPacketsNumber = 0;
_ethPacketsToMstcp.dwPacketsNumber = 0;
_ethPacketsToAdapter.hAdapterHandle = ethMRequest.hAdapterHandle;
_ethPacketsToMstcp.hAdapterHandle = ethMRequest.hAdapterHandle;
unsafe
{
for (int i = 0; i < ethMRequest.dwPacketsSuccess; i++)
{
var packet = ethMRequest._ethPacket[i];
var buffer = (Native.NdisApi.INTERMEDIATE_BUFFER_U *)packet._buffer;
if (buffer->m_dwDeviceFlags == Native.NdisApi.PACKET_FLAG.PACKET_FLAG_ON_SEND)
{
_ethPacketsToAdapter._ethPacket[_ethPacketsToAdapter.dwPacketsNumber++]._buffer = packet._buffer;
}
else
{
_ethPacketsToMstcp._ethPacket[_ethPacketsToMstcp.dwPacketsNumber++]._buffer = packet._buffer;
}
}
}
var success = true;
if (_ethPacketsToMstcp.dwPacketsNumber > 0)
{
success = SendPacketsToMstcp(ref _ethPacketsToMstcp);
}
if (_ethPacketsToAdapter.dwPacketsNumber > 0)
{
success = SendPacketsToAdapter(ref _ethPacketsToAdapter) && success;
}
return(success);
}
}
/// <summary>
/// Creates a new <see cref="Native.NdisApi.ETH_M_REQUEST" />.
/// </summary>
/// <remarks>The adapter handle still needs to be set.</remarks>
/// <returns>NativeMethods.ETH_M_REQUEST_256.</returns>
public Native.NdisApi.ETH_M_REQUEST CreateEthMRequest()
{
var ethPackets = new Native.NdisApi.ETH_M_REQUEST
{
_ethPacket = new Native.NdisApi.NDISRD_ETH_Packet[Native.NdisApi.EthMRequestEthPacketSize],
dwPacketsNumber = Native.NdisApi.EthMRequestEthPacketSize
};
for (var i = 0; i < Native.NdisApi.EthMRequestEthPacketSize; i++)
{
ethPackets._ethPacket[i]._buffer = _pinnedManagedArrayAllocator.AllocateArray(Native.NdisApi.IntermediateBufferSize);
}
return(ethPackets);
}
/// <summary>
/// Sends the packets to MSTCP.
/// </summary>
/// <param name="ethMRequest">The ether multiple request.</param>
/// <returns><c>true</c> if successful, <c>false</c> otherwise.</returns>
public bool SendPacketsToMstcp(ref Native.NdisApi.ETH_M_REQUEST ethMRequest)
{
return(Native.NdisApi.SendPacketsToMstcp(Handle, ref ethMRequest));
}
/// <summary>
/// Reads the packets to the specified <see cref="ethMRequest" />.
/// </summary>
/// <param name="ethMRequest">The ether multiple request.</param>
/// <remarks>The adapter handle needs to be set.</remarks>
/// <returns><c>true</c> if successful, <c>false</c> otherwise.</returns>
public bool ReadPackets(ref Native.NdisApi.ETH_M_REQUEST ethMRequest)
{
return(Native.NdisApi.ReadPackets(Handle, ref ethMRequest));
}