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ZeroTierOne/windows/TapDriver6/adapter.h

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/*
* TAP-Windows -- A kernel driver to provide virtual tap
* device functionality on Windows.
*
* This code was inspired by the CIPE-Win32 driver by Damion K. Wilson.
*
* This source code is Copyright (C) 2002-2014 OpenVPN Technologies, Inc.,
* and is released under the GPL version 2 (see below).
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __TAP_ADAPTER_CONTEXT_H_
#define __TAP_ADAPTER_CONTEXT_H_
#include "tap.h"
// Memory allocation tags.
#define TAP_ADAPTER_TAG ((ULONG)'ApaT') // "TapA
#define TAP_RX_NBL_TAG ((ULONG)'RpaT') // "TapR
#define TAP_RX_INJECT_BUFFER_TAG ((ULONG)'IpaT') // "TapI
#define TAP_MAX_NDIS_NAME_LENGTH 64 // 38 character GUID string plus extra..
// TAP receive indication NBL flag definitions.
#define TAP_RX_NBL_FLAGS NBL_FLAGS_MINIPORT_RESERVED
#define TAP_RX_NBL_FLAGS_CLEAR_ALL(_NBL) ((_NBL)->Flags &= ~TAP_RX_NBL_FLAGS)
#define TAP_RX_NBL_FLAG_SET(_NBL, _F) ((_NBL)->Flags |= ((_F) & TAP_RX_NBL_FLAGS))
#define TAP_RX_NBL_FLAG_CLEAR(_NBL, _F) ((_NBL)->Flags &= ~((_F) & TAP_RX_NBL_FLAGS))
#define TAP_RX_NBL_FLAG_TEST(_NBL, _F) (((_NBL)->Flags & ((_F) & TAP_RX_NBL_FLAGS)) != 0)
#define TAP_RX_NBL_FLAGS_IS_P2P 0x00001000
#define TAP_RX_NBL_FLAGS_IS_INJECTED 0x00002000
// MSDN Ref: http://msdn.microsoft.com/en-us/library/windows/hardware/ff560490(v=vs.85).aspx
typedef
enum _TAP_MINIPORT_ADAPTER_STATE
{
// The Halted state is the initial state of all adapters. When an
// adapter is in the Halted state, NDIS can call the driver's
// MiniportInitializeEx function to initialize the adapter.
MiniportHaltedState,
// In the Shutdown state, a system shutdown and restart must occur
// before the system can use the adapter again.
MiniportShutdownState,
// In the Initializing state, a miniport driver completes any
//operations that are required to initialize an adapter.
MiniportInitializingState,
// Entering the Paused state...
MiniportPausingState,
// In the Paused state, the adapter does not indicate received
// network data or accept send requests.
MiniportPausedState,
// In the Running state, a miniport driver performs send and
// receive processing for an adapter.
MiniportRunning,
// In the Restarting state, a miniport driver completes any
// operations that are required to restart send and receive
// operations for an adapter.
MiniportRestartingState
} TAP_MINIPORT_ADAPTER_STATE, *PTAP_MINIPORT_ADAPTER_STATE;
//
// Each adapter managed by this driver has a TapAdapter struct.
// ------------------------------------------------------------
// Since there is a one-to-one relationship between adapter instances
// and device instances this structure is the device extension as well.
//
typedef struct _TAP_ADAPTER_CONTEXT
{
LIST_ENTRY AdapterListLink;
volatile LONG RefCount;
NDIS_HANDLE MiniportAdapterHandle;
NDIS_SPIN_LOCK AdapterLock; // Lock for protection of state and outstanding sends and recvs
//
// All fields that are protected by the AdapterLock are included
// in the Locked structure to remind us to take the Lock
// before accessing them :)
//
struct
{
TAP_MINIPORT_ADAPTER_STATE AdapterState;
} Locked;
BOOLEAN ResetInProgress;
//
// NetCfgInstanceId as UNICODE_STRING
// ----------------------------------
// This a GUID string provided by NDIS that identifies the adapter instance.
// An example is:
//
// NetCfgInstanceId={410EB49D-2381-4FE7-9B36-498E22619DF0}
//
// Other names are derived from NetCfgInstanceId. For example, MiniportName:
//
// MiniportName=\DEVICE\{410EB49D-2381-4FE7-9B36-498E22619DF0}
//
NDIS_STRING NetCfgInstanceId;
WCHAR NetCfgInstanceIdBuffer[TAP_MAX_NDIS_NAME_LENGTH];
# define MINIPORT_INSTANCE_ID(a) ((a)->NetCfgInstanceIdAnsi.Buffer)
ANSI_STRING NetCfgInstanceIdAnsi; // Used occasionally
ULONG MtuSize; // 1500 byte (typical)
// TRUE if adapter should always be "connected" even when device node
// is not open by a userspace process.
//
// FALSE if connection state is application controlled.
BOOLEAN MediaStateAlwaysConnected;
// TRUE if device is "connected".
BOOLEAN LogicalMediaState;
NDIS_DEVICE_POWER_STATE CurrentPowerState;
BOOLEAN AllowNonAdmin;
MACADDR PermanentAddress; // From registry, if available
MACADDR CurrentAddress;
// Device registration parameters from NdisRegisterDeviceEx.
NDIS_STRING DeviceName;
WCHAR DeviceNameBuffer[TAP_MAX_NDIS_NAME_LENGTH];
NDIS_STRING LinkName;
WCHAR LinkNameBuffer[TAP_MAX_NDIS_NAME_LENGTH];
NDIS_HANDLE DeviceHandle;
PDEVICE_OBJECT DeviceObject;
BOOLEAN TapDeviceCreated; // WAS: m_TapIsRunning
PFILE_OBJECT TapFileObject; // Exclusive access
BOOLEAN TapFileIsOpen; // WAS: m_TapOpens
LONG TapFileOpenCount; // WAS: m_NumTapOpens
// Cancel-Safe read IRP queue.
TAP_IRP_CSQ PendingReadIrpQueue;
// Queue containing TAP packets representing host send NBs. These are
// waiting to be read by user-mode application.
TAP_PACKET_QUEUE SendPacketQueue;
// NBL pool for making TAP receive indications.
NDIS_HANDLE ReceiveNblPool;
volatile LONG ReceiveNblInFlightCount;
#define TAP_WAIT_POLL_LOOP_TIMEOUT 3000 // 3 seconds
NDIS_EVENT ReceiveNblInFlightCountZeroEvent;
/*
// Info for point-to-point mode
BOOLEAN m_tun;
IPADDR m_localIP;
IPADDR m_remoteNetwork;
IPADDR m_remoteNetmask;
ETH_HEADER m_TapToUser;
ETH_HEADER m_UserToTap;
ETH_HEADER m_UserToTap_IPv6; // same as UserToTap but proto=ipv6
*/
// Info for DHCP server masquerade
/*
BOOLEAN m_dhcp_enabled;
IPADDR m_dhcp_addr;
ULONG m_dhcp_netmask;
IPADDR m_dhcp_server_ip;
BOOLEAN m_dhcp_server_arp;
MACADDR m_dhcp_server_mac;
ULONG m_dhcp_lease_time;
UCHAR m_dhcp_user_supplied_options_buffer[DHCP_USER_SUPPLIED_OPTIONS_BUFFER_SIZE];
ULONG m_dhcp_user_supplied_options_buffer_len;
BOOLEAN m_dhcp_received_discover;
ULONG m_dhcp_bad_requests;
*/
// Multicast list. Fixed size.
ULONG ulMCListSize;
UCHAR MCList[TAP_MAX_MCAST_LIST][MACADDR_SIZE];
ULONG PacketFilter;
ULONG ulLookahead;
//
// Statistics
// -------------------------------------------------------------------------
//
// Packet counts
ULONG64 FramesRxDirected;
ULONG64 FramesRxMulticast;
ULONG64 FramesRxBroadcast;
ULONG64 FramesTxDirected;
ULONG64 FramesTxMulticast;
ULONG64 FramesTxBroadcast;
// Byte counts
ULONG64 BytesRxDirected;
ULONG64 BytesRxMulticast;
ULONG64 BytesRxBroadcast;
ULONG64 BytesTxDirected;
ULONG64 BytesTxMulticast;
ULONG64 BytesTxBroadcast;
// Count of transmit errors
ULONG TxAbortExcessCollisions;
ULONG TxLateCollisions;
ULONG TxDmaUnderrun;
ULONG TxLostCRS;
ULONG TxOKButDeferred;
ULONG OneRetry;
ULONG MoreThanOneRetry;
ULONG TotalRetries;
ULONG TransmitFailuresOther;
// Count of receive errors
ULONG RxCrcErrors;
ULONG RxAlignmentErrors;
ULONG RxResourceErrors;
ULONG RxDmaOverrunErrors;
ULONG RxCdtFrames;
ULONG RxRuntErrors;
#if PACKET_TRUNCATION_CHECK
LONG m_RxTrunc, m_TxTrunc;
#endif
BOOLEAN m_InterfaceIsRunning;
LONG m_Rx, m_RxErr;
NDIS_MEDIUM m_Medium;
// Help to tear down the adapter by keeping
// some state information on allocated
// resources.
BOOLEAN m_CalledAdapterFreeResources;
BOOLEAN m_RegisteredAdapterShutdownHandler;
} TAP_ADAPTER_CONTEXT, *PTAP_ADAPTER_CONTEXT;
FORCEINLINE
LONG
tapAdapterContextReference(
__in PTAP_ADAPTER_CONTEXT Adapter
)
{
LONG refCount = NdisInterlockedIncrement(&Adapter->RefCount);
ASSERT(refCount>1); // Cannot dereference a zombie.
return refCount;
}
VOID
tapAdapterContextFree(
__in PTAP_ADAPTER_CONTEXT Adapter
);
FORCEINLINE
LONG
tapAdapterContextDereference(
IN PTAP_ADAPTER_CONTEXT Adapter
)
{
LONG refCount = NdisInterlockedDecrement(&Adapter->RefCount);
ASSERT(refCount >= 0);
if (!refCount)
{
tapAdapterContextFree(Adapter);
}
return refCount;
}
VOID
tapAdapterAcquireLock(
__in PTAP_ADAPTER_CONTEXT Adapter,
__in BOOLEAN DispatchLevel
);
VOID
tapAdapterReleaseLock(
__in PTAP_ADAPTER_CONTEXT Adapter,
__in BOOLEAN DispatchLevel
);
// Returns with added reference on adapter context.
PTAP_ADAPTER_CONTEXT
tapAdapterContextFromDeviceObject(
__in PDEVICE_OBJECT DeviceObject
);
BOOLEAN
tapAdapterReadAndWriteReady(
__in PTAP_ADAPTER_CONTEXT Adapter
);
NDIS_STATUS
tapAdapterSendAndReceiveReady(
__in PTAP_ADAPTER_CONTEXT Adapter
);
ULONG
tapGetNetBufferFrameType(
__in PNET_BUFFER NetBuffer
);
ULONG
tapGetNetBufferCountsFromNetBufferList(
__in PNET_BUFFER_LIST NetBufferList,
__inout_opt PULONG TotalByteCount // Of all linked NBs
);
// Prototypes for standard NDIS miniport entry points
MINIPORT_SET_OPTIONS AdapterSetOptions;
MINIPORT_INITIALIZE AdapterCreate;
MINIPORT_HALT AdapterHalt;
MINIPORT_UNLOAD TapDriverUnload;
MINIPORT_PAUSE AdapterPause;
MINIPORT_RESTART AdapterRestart;
MINIPORT_OID_REQUEST AdapterOidRequest;
MINIPORT_SEND_NET_BUFFER_LISTS AdapterSendNetBufferLists;
MINIPORT_RETURN_NET_BUFFER_LISTS AdapterReturnNetBufferLists;
MINIPORT_CANCEL_SEND AdapterCancelSend;
MINIPORT_CHECK_FOR_HANG AdapterCheckForHangEx;
MINIPORT_RESET AdapterReset;
MINIPORT_DEVICE_PNP_EVENT_NOTIFY AdapterDevicePnpEventNotify;
MINIPORT_SHUTDOWN AdapterShutdownEx;
MINIPORT_CANCEL_OID_REQUEST AdapterCancelOidRequest;
#endif // __TAP_ADAPTER_CONTEXT_H_
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