mirror of
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197 lines
8.1 KiB
C
197 lines
8.1 KiB
C
/*
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* TAP-Windows -- A kernel driver to provide virtual tap
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* device functionality on Windows.
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*
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* This code was inspired by the CIPE-Win32 driver by Damion K. Wilson.
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*
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* This source code is Copyright (C) 2002-2014 OpenVPN Technologies, Inc.,
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* and is released under the GPL version 2 (see below).
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see the file COPYING included with this
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* distribution); if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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//====================================================================
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// Product and Version public settings
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//====================================================================
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#define PRODUCT_STRING PRODUCT_TAP_DEVICE_DESCRIPTION
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//
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// Update the driver version number every time you release a new driver
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// The high word is the major version. The low word is the minor version.
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// Also make sure that VER_FILEVERSION specified in the .RC file also
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// matches with the driver version because NDISTESTER checks for that.
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//
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#ifndef TAP_DRIVER_MAJOR_VERSION
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#define TAP_DRIVER_MAJOR_VERSION 0x04
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#define TAP_DRIVER_MINOR_VERSION 0x02
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#endif
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#define TAP_DRIVER_VENDOR_VERSION ((TAP_DRIVER_MAJOR_VERSION << 16) | TAP_DRIVER_MINOR_VERSION)
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//
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// Define the NDIS miniport interface version that this driver targets.
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//
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#if defined(NDIS60_MINIPORT)
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# define TAP_NDIS_MAJOR_VERSION 6
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# define TAP_NDIS_MINOR_VERSION 0
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#elif defined(NDIS61_MINIPORT)
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# define TAP_NDIS_MAJOR_VERSION 6
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# define TAP_NDIS_MINOR_VERSION 1
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#elif defined(NDIS620_MINIPORT)
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# define TAP_NDIS_MAJOR_VERSION 6
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# define TAP_NDIS_MINOR_VERSION 20
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#elif defined(NDIS630_MINIPORT)
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# define TAP_NDIS_MAJOR_VERSION 6
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# define TAP_NDIS_MINOR_VERSION 30
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#else
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#define TAP_NDIS_MAJOR_VERSION 5
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#define TAP_NDIS_MINOR_VERSION 0
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#endif
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//===========================================================
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// Driver constants
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//===========================================================
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#define ETHERNET_HEADER_SIZE (sizeof (ETH_HEADER))
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//#define ETHERNET_MTU 1500
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#define ETHERNET_MTU 2800
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#define ETHERNET_PACKET_SIZE (ETHERNET_MTU + ETHERNET_HEADER_SIZE)
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#define DEFAULT_PACKET_LOOKAHEAD (ETHERNET_PACKET_SIZE)
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#define VLAN_TAG_SIZE 4
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//===========================================================
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// Medium properties
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//===========================================================
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#define TAP_FRAME_HEADER_SIZE ETHERNET_HEADER_SIZE
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#define TAP_FRAME_MAX_DATA_SIZE ETHERNET_MTU
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#define TAP_MAX_FRAME_SIZE (TAP_FRAME_HEADER_SIZE + TAP_FRAME_MAX_DATA_SIZE)
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#define TAP_MIN_FRAME_SIZE 60
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#define TAP_MEDIUM_TYPE NdisMedium802_3
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//===========================================================
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// Physical adapter properties
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//===========================================================
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// The bus that connects the adapter to the PC.
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// (Example: PCI adapters should use NdisInterfacePci).
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#define TAP_INTERFACE_TYPE NdisInterfaceInternal
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#define TAP_VENDOR_DESC PRODUCT_TAP_WIN_DEVICE_DESCRIPTION
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// Highest byte is the NIC byte plus three vendor bytes. This is normally
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// obtained from the NIC.
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#define TAP_VENDOR_ID 0x00FFFFFF
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// If you have physical hardware on 802.3, use NdisPhysicalMedium802_3.
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#define TAP_PHYSICAL_MEDIUM NdisPhysicalMediumUnspecified
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// Claim to be 100mbps duplex
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#define MEGABITS_PER_SECOND 1000000ULL
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#define TAP_XMIT_SPEED (100ULL*MEGABITS_PER_SECOND)
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#define TAP_RECV_SPEED (100ULL*MEGABITS_PER_SECOND)
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// Max number of multicast addresses supported in hardware
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#define TAP_MAX_MCAST_LIST 128
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#define TAP_MAX_LOOKAHEAD TAP_FRAME_MAX_DATA_SIZE
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#define TAP_BUFFER_SIZE TAP_MAX_FRAME_SIZE
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// Set this value to TRUE if there is a physical adapter.
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#define TAP_HAS_PHYSICAL_CONNECTOR FALSE
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#define TAP_ACCESS_TYPE NET_IF_ACCESS_BROADCAST
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#define TAP_DIRECTION_TYPE NET_IF_DIRECTION_SENDRECEIVE
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#define TAP_CONNECTION_TYPE NET_IF_CONNECTION_DEDICATED
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// This value must match the *IfType in the driver .inf file
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#define TAP_IFTYPE IF_TYPE_ETHERNET_CSMACD
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//
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// This is a virtual device, so it can tolerate surprise removal and
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// suspend. Ensure the correct flags are set for your hardware.
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//
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#define TAP_ADAPTER_ATTRIBUTES_FLAGS (\
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NDIS_MINIPORT_ATTRIBUTES_SURPRISE_REMOVE_OK | NDIS_MINIPORT_ATTRIBUTES_NDIS_WDM)
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#define TAP_SUPPORTED_FILTERS ( \
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NDIS_PACKET_TYPE_DIRECTED | \
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NDIS_PACKET_TYPE_MULTICAST | \
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NDIS_PACKET_TYPE_BROADCAST | \
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NDIS_PACKET_TYPE_ALL_LOCAL | \
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NDIS_PACKET_TYPE_PROMISCUOUS | \
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NDIS_PACKET_TYPE_ALL_MULTICAST)
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//#define TAP_MAX_MCAST_LIST 128 // Max length of multicast address list
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//
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// Specify a bitmask that defines optional properties of the NIC.
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// This miniport indicates receive with NdisMIndicateReceiveNetBufferLists
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// function. Such a driver should set this NDIS_MAC_OPTION_TRANSFERS_NOT_PEND
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// flag.
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//
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// NDIS_MAC_OPTION_NO_LOOPBACK tells NDIS that NIC has no internal
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// loopback support so NDIS will manage loopbacks on behalf of
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// this driver.
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//
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// NDIS_MAC_OPTION_COPY_LOOKAHEAD_DATA tells the protocol that
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// our receive buffer is not on a device-specific card. If
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// NDIS_MAC_OPTION_COPY_LOOKAHEAD_DATA is not set, multi-buffer
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// indications are copied to a single flat buffer.
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//
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#define TAP_MAC_OPTIONS (\
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NDIS_MAC_OPTION_COPY_LOOKAHEAD_DATA | \
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NDIS_MAC_OPTION_TRANSFERS_NOT_PEND | \
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NDIS_MAC_OPTION_NO_LOOPBACK)
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#define TAP_ADAPTER_CHECK_FOR_HANG_TIME_IN_SECONDS 4
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// NDIS 6.x miniports must support all counters in OID_GEN_STATISTICS.
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#define TAP_SUPPORTED_STATISTICS (\
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NDIS_STATISTICS_FLAGS_VALID_DIRECTED_FRAMES_RCV | \
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NDIS_STATISTICS_FLAGS_VALID_MULTICAST_FRAMES_RCV | \
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NDIS_STATISTICS_FLAGS_VALID_BROADCAST_FRAMES_RCV | \
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NDIS_STATISTICS_FLAGS_VALID_BYTES_RCV | \
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NDIS_STATISTICS_FLAGS_VALID_RCV_DISCARDS | \
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NDIS_STATISTICS_FLAGS_VALID_RCV_ERROR | \
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NDIS_STATISTICS_FLAGS_VALID_DIRECTED_FRAMES_XMIT | \
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NDIS_STATISTICS_FLAGS_VALID_MULTICAST_FRAMES_XMIT | \
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NDIS_STATISTICS_FLAGS_VALID_BROADCAST_FRAMES_XMIT | \
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NDIS_STATISTICS_FLAGS_VALID_BYTES_XMIT | \
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NDIS_STATISTICS_FLAGS_VALID_XMIT_ERROR | \
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NDIS_STATISTICS_FLAGS_VALID_XMIT_DISCARDS | \
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NDIS_STATISTICS_FLAGS_VALID_DIRECTED_BYTES_RCV | \
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NDIS_STATISTICS_FLAGS_VALID_MULTICAST_BYTES_RCV | \
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NDIS_STATISTICS_FLAGS_VALID_BROADCAST_BYTES_RCV | \
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NDIS_STATISTICS_FLAGS_VALID_DIRECTED_BYTES_XMIT | \
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NDIS_STATISTICS_FLAGS_VALID_MULTICAST_BYTES_XMIT | \
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NDIS_STATISTICS_FLAGS_VALID_BROADCAST_BYTES_XMIT)
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#define MINIMUM_MTU 576 // USE TCP Minimum MTU
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#define MAXIMUM_MTU 65536 // IP maximum MTU
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#define PACKET_QUEUE_SIZE 64 // tap -> userspace queue size
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#define IRP_QUEUE_SIZE 16 // max number of simultaneous i/o operations from userspace
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#define INJECT_QUEUE_SIZE 16 // DHCP/ARP -> tap injection queue
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#define TAP_LITTLE_ENDIAN // affects ntohs, htonl, etc. functions
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