mirror of
https://github.com/NAStools/zerotierone.git
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114 lines
2.9 KiB
C
114 lines
2.9 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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// Memory Management
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//------------------
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PVOID
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MemAlloc(
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__in ULONG p_Size,
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__in BOOLEAN zero
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);
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VOID
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MemFree(
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__in PVOID p_Addr,
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__in ULONG p_Size
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);
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//======================================================================
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// TAP Packet Queue
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//======================================================================
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typedef
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struct _TAP_PACKET
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{
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LIST_ENTRY QueueLink;
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# define TAP_PACKET_SIZE(data_size) (sizeof (TAP_PACKET) + (data_size))
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# define TP_TUN 0x80000000
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# define TP_SIZE_MASK (~TP_TUN)
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ULONG m_SizeFlags;
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// m_Data must be the last struct member
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UCHAR m_Data [];
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} TAP_PACKET, *PTAP_PACKET;
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#define TAP_PACKET_TAG '6PAT' // "TAP6"
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typedef struct _TAP_PACKET_QUEUE
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{
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KSPIN_LOCK QueueLock;
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LIST_ENTRY Queue;
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ULONG Count; // Count of currently queued items
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ULONG MaxCount;
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} TAP_PACKET_QUEUE, *PTAP_PACKET_QUEUE;
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VOID
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tapPacketQueueInsertTail(
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__in PTAP_PACKET_QUEUE TapPacketQueue,
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__in PTAP_PACKET TapPacket
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);
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// Call with QueueLock held
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PTAP_PACKET
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tapPacketRemoveHeadLocked(
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__in PTAP_PACKET_QUEUE TapPacketQueue
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);
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PTAP_PACKET
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tapPacketRemoveHead(
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__in PTAP_PACKET_QUEUE TapPacketQueue
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);
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VOID
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tapPacketQueueInitialize(
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__in PTAP_PACKET_QUEUE TapPacketQueue
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);
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//----------------------
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// Cancel-Safe IRP Queue
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//----------------------
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typedef struct _TAP_IRP_CSQ
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{
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IO_CSQ CsqQueue;
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KSPIN_LOCK QueueLock;
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LIST_ENTRY Queue;
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ULONG Count; // Count of currently queued items
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ULONG MaxCount;
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} TAP_IRP_CSQ, *PTAP_IRP_CSQ;
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VOID
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tapIrpCsqInitialize(
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__in PTAP_IRP_CSQ TapIrpCsq
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);
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VOID
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tapIrpCsqFlush(
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__in PTAP_IRP_CSQ TapIrpCsq
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);
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