/* *  TAP-Win32 -- A kernel driver to provide virtual tap device functionality *               on Windows.  Originally derived from the CIPE-Win32 *               project by Damion K. Wilson, with extensive modifications by *               James Yonan. * *  All source code which derives from the CIPE-Win32 project is *  Copyright (C) Damion K. Wilson, 2003, and is released under the *  GPL version 2 (see below). * *  All other source code is Copyright (C) 2002-2005 OpenVPN Solutions LLC, *  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_TYPES_DEFINED#define TAP_TYPES_DEFINEDtypedef struct _Queue{  ULONG base;  ULONG size;  ULONG capacity;  ULONG max_size;  PVOID data[];} Queue;typedef struct _TapAdapter;typedef struct _TapPacket;typedef union _TapAdapterQuery{  NDIS_HARDWARE_STATUS m_HardwareStatus;  NDIS_MEDIUM m_Medium;  NDIS_PHYSICAL_MEDIUM m_PhysicalMedium;  UCHAR m_MacAddress [6];  UCHAR m_Buffer [256];  ULONG m_Long;  USHORT m_Short;  UCHAR m_Byte;}TapAdapterQuery, *TapAdapterQueryPointer;typedef struct _TapExtension{  // TAP device object and packet queues  Queue *m_PacketQueue, *m_IrpQueue;  PDEVICE_OBJECT m_TapDevice;  NDIS_HANDLE m_TapDeviceHandle;  ULONG m_TapOpens;  // Used to lock packet queues  NDIS_SPIN_LOCK m_QueueLock;  BOOLEAN m_AllocatedSpinlocks;  // Used to bracket open/close  // state changes.  MUTEX m_OpenCloseMutex;  // True if device has been permanently halted  BOOLEAN m_Halt;  // TAP device name  unsigned char *m_TapName;  UNICODE_STRING m_UnicodeLinkName;  BOOLEAN m_CreatedUnicodeLinkName;  // Used for device status ioctl only  const char *m_LastErrorFilename;  int m_LastErrorLineNumber;  LONG m_NumTapOpens;  // Flags  BOOLEAN m_TapIsRunning;  BOOLEAN m_CalledTapDeviceFreeResources;}TapExtension, *TapExtensionPointer;typedef struct _TapPacket   {#   define TAP_PACKET_SIZE(data_size) (sizeof (TapPacket) + (data_size))#   define TP_TUN 0x80000000#   define TP_SIZE_MASK      (~TP_TUN)    ULONG m_SizeFlags;    UCHAR m_Data []; // m_Data must be the last struct member   }TapPacket, *TapPacketPointer;typedef struct _TapAdapter{# define NAME(a) ((a)->m_NameAnsi.Buffer)  ANSI_STRING m_NameAnsi;  MACADDR m_MAC;  BOOLEAN m_InterfaceIsRunning;  NDIS_HANDLE m_MiniportAdapterHandle;  LONG m_Rx, m_Tx, m_RxErr, m_TxErr;#if PACKET_TRUNCATION_CHECK  LONG m_RxTrunc, m_TxTrunc;#endif  NDIS_MEDIUM m_Medium;  ULONG m_Lookahead;  ULONG m_MTU;  // TRUE if adapter should always be  // "connected" even when device node  // is not open by a userspace process.  BOOLEAN m_MediaStateAlwaysConnected;  // TRUE if device is "connected"  BOOLEAN m_MediaState;  // Adapter power state  char m_DeviceState;  // 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;  MACADDR m_MAC_Broadcast;  // Used 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;  // Help to tear down the adapter by keeping  // some state information on allocated  // resources.  BOOLEAN m_CalledAdapterFreeResources;  BOOLEAN m_RegisteredAdapterShutdownHandler;  // Multicast list info  NDIS_SPIN_LOCK m_MCLock;  BOOLEAN m_MCLockAllocated;  ULONG m_MCListSize;  MC_LIST m_MCList;  // Information on the TAP device  TapExtension m_Extension;} TapAdapter, *TapAdapterPointer;#endif