1365 lines
47 KiB
C
1365 lines
47 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright (C) 2018-2019 WireGuard LLC. All Rights Reserved.
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*/
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#define NDIS_MINIPORT_DRIVER
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#define NDIS620_MINIPORT
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#define NDIS_SUPPORT_NDIS620 1
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#define NDIS_WDM 1
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#include <stdio.h>
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#include <string.h>
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#include <wdm.h>
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#include <wdmsec.h>
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#include <ndis.h>
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#include <bcrypt.h>
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#include <ntstrsafe.h>
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#pragma warning(disable : 4100) // unreferenced formal parameter
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#pragma warning(disable : 4200) // nonstandard extension used: zero-sized array in struct/union
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#pragma warning(disable : 4204) // nonstandard extension used: non-constant aggregate initializer
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#pragma warning(disable : 4221) // nonstandard extension used: <member>: cannot be initialized using address of automatic variable <variable>
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#define TUN_DEVICE_NAME L"WINTUN%u"
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#define TUN_VENDOR_NAME "Wintun Tunnel"
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#define TUN_VENDOR_ID 0xFFFFFF00
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#define TUN_LINK_SPEED 100000000000ULL // 100gbps
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#define TUN_EXCH_MAX_PACKETS 256 // Maximum number of exchange packets that can be exchanged in a single read/write
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#define TUN_EXCH_MAX_PACKET_SIZE 0xF000 // Maximum exchange packet size - empirically determined by net buffer list (pool) limitations
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#define TUN_EXCH_ALIGNMENT 16 // Memory alignment in exchange buffers
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#define TUN_EXCH_MAX_IP_PACKET_SIZE (TUN_EXCH_MAX_PACKET_SIZE - sizeof(TUN_PACKET)) // Maximum IP packet size (headers + payload)
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#define TUN_EXCH_MAX_BUFFER_SIZE (TUN_EXCH_MAX_PACKETS * TUN_EXCH_MAX_PACKET_SIZE) // Maximum size of read/write exchange buffer
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#define TUN_QUEUE_MAX_NBLS 1000
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typedef struct _TUN_PACKET {
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ULONG Size; // Size of packet data (TUN_EXCH_MAX_IP_PACKET_SIZE max)
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_Field_size_bytes_(Size)
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__declspec(align(TUN_EXCH_ALIGNMENT))
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UCHAR Data[]; // Packet data
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} TUN_PACKET;
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typedef enum _TUN_STATE {
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TUN_STATE_HALTED = 0, // 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.
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TUN_STATE_SHUTDOWN, // In the Shutdown state, a system shutdown and restart must occur before the system can use the adapter again
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TUN_STATE_INITIALIZING, // In the Initializing state, a miniport driver completes any operations that are required to initialize an adapter.
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TUN_STATE_PAUSED, // In the Paused state, the adapter does not indicate received network data or accept send requests.
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TUN_STATE_RESTARTING, // In the Restarting state, a miniport driver completes any operations that are required to restart send and receive operations for an adapter.
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TUN_STATE_RUNNING, // In the Running state, a miniport driver performs send and receive processing for an adapter.
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TUN_STATE_PAUSING, // In the Pausing state, a miniport driver completes any operations that are required to stop send and receive operations for an adapter.
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} TUN_STATE;
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typedef struct _TUN_CTX {
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volatile TUN_STATE State;
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volatile NDIS_DEVICE_POWER_STATE PowerState;
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NDIS_HANDLE MiniportAdapterHandle;
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NDIS_STATISTICS_INFO Statistics;
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volatile LONG64 ActiveTransactionCount;
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struct {
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NDIS_HANDLE Handle;
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DEVICE_OBJECT *Object;
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volatile LONG64 RefCount;
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struct {
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KSPIN_LOCK Lock;
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IO_CSQ Csq;
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LIST_ENTRY List;
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} ReadQueue;
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} Device;
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struct {
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KSPIN_LOCK Lock;
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NET_BUFFER_LIST *FirstNbl, *LastNbl;
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NET_BUFFER *NextNb;
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LONG NumNbl;
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} PacketQueue;
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NDIS_HANDLE NBLPool;
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} TUN_CTX;
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static NDIS_HANDLE NdisMiniportDriverHandle = NULL;
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#if REG_DWORD == REG_DWORD_BIG_ENDIAN
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#define TUN_MEMORY_TAG 'wtun'
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#define TunHtons(x) ((USHORT)(x))
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#define TunHtonl(x) ((ULONG)(x))
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#elif REG_DWORD == REG_DWORD_LITTLE_ENDIAN
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#define TUN_MEMORY_TAG 'nutw'
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#define TunHtons(x) RtlUshortByteSwap(x)
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#define TunHtonl(x) RtlUlongByteSwap(x)
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#else
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#error "Unable to determine endianess"
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#endif
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#define TUN_CSQ_INSERT_HEAD ((PVOID)TRUE)
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#define TUN_CSQ_INSERT_TAIL ((PVOID)FALSE)
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#define InterlockedGet(val) (InterlockedAdd((val), 0))
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#define InterlockedGet64(val) (InterlockedAdd64((val), 0))
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#define InterlockedGetPointer(val) (InterlockedCompareExchangePointer((val), NULL, NULL))
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#define InterlockedSubtract(val, n) (InterlockedAdd((val), -(LONG)(n)))
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#define InterlockedSubtract64(val, n) (InterlockedAdd64((val), -(LONG64)(n)))
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#define TunPacketAlign(size) (((UINT)(size) + (UINT)(TUN_EXCH_ALIGNMENT - 1)) & ~(UINT)(TUN_EXCH_ALIGNMENT - 1))
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#define TunInitUnicodeString(str, buf) { (str)->Length = 0; (str)->MaximumLength = sizeof(buf); (str)->Buffer = buf; }
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_IRQL_requires_max_(DISPATCH_LEVEL)
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_IRQL_requires_same_
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static void TunIndicateStatus(_In_ TUN_CTX *ctx)
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{
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NDIS_LINK_STATE state = {
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.Header = {
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.Type = NDIS_OBJECT_TYPE_DEFAULT,
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.Revision = NDIS_LINK_STATE_REVISION_1,
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.Size = NDIS_SIZEOF_LINK_STATE_REVISION_1
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},
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.MediaConnectState = ctx->Device.RefCount > 0 ? MediaConnectStateConnected : MediaConnectStateDisconnected,
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.MediaDuplexState = MediaDuplexStateFull,
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.XmitLinkSpeed = TUN_LINK_SPEED,
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.RcvLinkSpeed = TUN_LINK_SPEED,
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.PauseFunctions = NdisPauseFunctionsUnsupported
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};
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NDIS_STATUS_INDICATION t = {
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.Header = {
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.Type = NDIS_OBJECT_TYPE_STATUS_INDICATION,
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.Revision = NDIS_STATUS_INDICATION_REVISION_1,
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.Size = NDIS_SIZEOF_STATUS_INDICATION_REVISION_1
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},
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.SourceHandle = ctx->MiniportAdapterHandle,
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.StatusCode = NDIS_STATUS_LINK_STATE,
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.StatusBuffer = &state,
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.StatusBufferSize = sizeof(state)
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};
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NdisMIndicateStatusEx(ctx->MiniportAdapterHandle, &t);
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}
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_IRQL_requires_max_(HIGH_LEVEL)
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static TUN_CTX * volatile *TunGetContextPointer(_In_ DEVICE_OBJECT *DeviceObject)
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{
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return (TUN_CTX * volatile *)NdisGetDeviceReservedExtension(DeviceObject);
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}
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_IRQL_requires_max_(HIGH_LEVEL)
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static TUN_CTX *TunGetContext(_In_ DEVICE_OBJECT *DeviceObject)
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{
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TUN_CTX * volatile * ctx = TunGetContextPointer(DeviceObject);
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return ctx ? InterlockedGetPointer(ctx) : NULL;
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}
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_IRQL_requires_max_(DISPATCH_LEVEL)
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static void TunCompleteRequest(_Inout_ IRP *Irp, _In_ ULONG_PTR Information, _In_ NTSTATUS Status)
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{
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Irp->IoStatus.Information = Information;
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Irp->IoStatus.Status = Status;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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}
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_IRQL_requires_same_
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static NTSTATUS TunCheckForPause(_Inout_ TUN_CTX *ctx, _In_ LONG64 increment)
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{
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ASSERT(InterlockedGet64(&ctx->ActiveTransactionCount) <= MAXLONG64 - increment);
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InterlockedAdd64(&ctx->ActiveTransactionCount, increment);
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return
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InterlockedGet((LONG *)&ctx->State) != TUN_STATE_RUNNING ? STATUS_NDIS_PAUSED :
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ctx->PowerState >= NdisDeviceStateD1 ? STATUS_NDIS_LOW_POWER_STATE :
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STATUS_SUCCESS;
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}
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_IRQL_requires_max_(DISPATCH_LEVEL)
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static NDIS_STATUS TunCompletePause(_Inout_ TUN_CTX *ctx, _In_ LONG64 decrement)
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{
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ASSERT(decrement <= InterlockedGet64(&ctx->ActiveTransactionCount));
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if (!InterlockedSubtract64(&ctx->ActiveTransactionCount, decrement) &&
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InterlockedCompareExchange((LONG *)&ctx->State, TUN_STATE_PAUSED, TUN_STATE_PAUSING) == TUN_STATE_PAUSING) {
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InterlockedExchange64(&ctx->Device.RefCount, 0);
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TunIndicateStatus(ctx);
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NdisMPauseComplete(ctx->MiniportAdapterHandle);
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return NDIS_STATUS_SUCCESS;
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}
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return NDIS_STATUS_PENDING;
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}
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static IO_CSQ_INSERT_IRP_EX TunCsqInsertIrpEx;
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_Use_decl_annotations_
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static NTSTATUS TunCsqInsertIrpEx(IO_CSQ *Csq, IRP *Irp, PVOID InsertContext)
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{
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TUN_CTX *ctx = CONTAINING_RECORD(Csq, TUN_CTX, Device.ReadQueue.Csq);
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(InsertContext == TUN_CSQ_INSERT_HEAD ? InsertHeadList : InsertTailList)(&ctx->Device.ReadQueue.List, &Irp->Tail.Overlay.ListEntry);
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return STATUS_SUCCESS;
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}
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static IO_CSQ_REMOVE_IRP TunCsqRemoveIrp;
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_Use_decl_annotations_
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static VOID TunCsqRemoveIrp(IO_CSQ *Csq, IRP *Irp)
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{
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RemoveEntryList(&Irp->Tail.Overlay.ListEntry);
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}
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static IO_CSQ_PEEK_NEXT_IRP TunCsqPeekNextIrp;
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_Use_decl_annotations_
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static IRP *TunCsqPeekNextIrp(IO_CSQ *Csq, IRP *Irp, _In_ PVOID PeekContext)
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{
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TUN_CTX *ctx = CONTAINING_RECORD(Csq, TUN_CTX, Device.ReadQueue.Csq);
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/* If the IRP is non-NULL, we will start peeking from that IRP onwards, else
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* we will start from the listhead. This is done under the assumption that
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* new IRPs are always inserted at the tail. */
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for (LIST_ENTRY
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*head = &ctx->Device.ReadQueue.List,
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*next = Irp ? Irp->Tail.Overlay.ListEntry.Flink : head->Flink;
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next != head;
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next = next->Flink)
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{
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IRP *irp_next = CONTAINING_RECORD(next, IRP, Tail.Overlay.ListEntry);
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if (!PeekContext)
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return irp_next;
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IO_STACK_LOCATION *stack = IoGetCurrentIrpStackLocation(irp_next);
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if (stack->FileObject == (FILE_OBJECT *)PeekContext)
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return irp_next;
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}
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return NULL;
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}
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_IRQL_raises_(DISPATCH_LEVEL)
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_IRQL_requires_max_(DISPATCH_LEVEL)
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_Acquires_lock_(CONTAINING_RECORD(Csq, TUN_CTX, Device.ReadQueue.Csq)->Device.ReadQueue.Lock)
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static VOID TunCsqAcquireLock(_In_ IO_CSQ *Csq, _Out_ _At_(*Irql, _Post_ _IRQL_saves_) KIRQL *Irql)
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{
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TUN_CTX *ctx = CONTAINING_RECORD(Csq, TUN_CTX, Device.ReadQueue.Csq);
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KeAcquireSpinLock(&ctx->Device.ReadQueue.Lock, Irql);
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}
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_IRQL_requires_(DISPATCH_LEVEL)
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_Releases_lock_(CONTAINING_RECORD(Csq, TUN_CTX, Device.ReadQueue.Csq)->Device.ReadQueue.Lock)
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static VOID TunCsqReleaseLock(_In_ IO_CSQ *Csq, _In_ _IRQL_restores_ KIRQL Irql)
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{
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TUN_CTX *ctx = CONTAINING_RECORD(Csq, TUN_CTX, Device.ReadQueue.Csq);
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KeReleaseSpinLock(&ctx->Device.ReadQueue.Lock, Irql);
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}
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static IO_CSQ_COMPLETE_CANCELED_IRP TunCsqCompleteCanceledIrp;
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_Use_decl_annotations_
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static VOID TunCsqCompleteCanceledIrp(IO_CSQ *Csq, IRP *Irp)
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{
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TUN_CTX *ctx = CONTAINING_RECORD(Csq, TUN_CTX, Device.ReadQueue.Csq);
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TunCompleteRequest(Irp, 0, STATUS_CANCELLED);
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TunCompletePause(ctx, 1);
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}
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_IRQL_requires_same_
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static void TunSetNBLStatus(_Inout_opt_ NET_BUFFER_LIST *nbl, _In_ NDIS_STATUS status)
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{
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for (; nbl; nbl = NET_BUFFER_LIST_NEXT_NBL(nbl))
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NET_BUFFER_LIST_STATUS(nbl) = status;
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}
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_IRQL_requires_max_(DISPATCH_LEVEL)
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static NTSTATUS TunGetIRPBuffer(_Inout_ IRP *Irp, _Out_ UCHAR **buffer, _Out_ ULONG *size)
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{
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/* Get and validate request parameters. */
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ULONG priority;
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IO_STACK_LOCATION *stack = IoGetCurrentIrpStackLocation(Irp);
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switch (stack->MajorFunction) {
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case IRP_MJ_READ:
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*size = stack->Parameters.Read.Length;
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priority = NormalPagePriority;
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break;
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case IRP_MJ_WRITE:
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*size = stack->Parameters.Write.Length;
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priority = NormalPagePriority | MdlMappingNoWrite;
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break;
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default:
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return STATUS_INVALID_PARAMETER;
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}
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if (*size > TUN_EXCH_MAX_BUFFER_SIZE)
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return STATUS_INVALID_USER_BUFFER;
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/* Get buffer size and address. */
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if (!Irp->MdlAddress)
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return STATUS_INVALID_PARAMETER;
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ULONG size_mdl;
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NdisQueryMdl(Irp->MdlAddress, buffer, &size_mdl, priority);
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if (!buffer)
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return STATUS_INSUFFICIENT_RESOURCES;
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if (size_mdl < *size)
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*size = size_mdl;
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return STATUS_SUCCESS;
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}
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_IRQL_requires_max_(DISPATCH_LEVEL)
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static BOOLEAN TunCanFitIntoIrp(_Inout_ IRP *Irp, _In_ NET_BUFFER *nb)
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{
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return TRUE; //TODO(rozmansi): Implement me!
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}
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_IRQL_requires_max_(DISPATCH_LEVEL)
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static NTSTATUS TunWriteIntoIrp(_Inout_ IRP *Irp, _In_ NET_BUFFER *nb)
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{
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NTSTATUS status = STATUS_UNSUCCESSFUL;
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UCHAR *buffer = NULL;
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ULONG size = 0;
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status = TunGetIRPBuffer(Irp, &buffer, &size);
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if (status != STATUS_SUCCESS)
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return status;
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UCHAR *b = buffer + Irp->IoStatus.Information, *b_end = buffer + size;
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ULONG p_size = NET_BUFFER_DATA_LENGTH(nb);
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if (p_size > TUN_EXCH_MAX_IP_PACKET_SIZE)
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return NDIS_STATUS_INVALID_LENGTH;
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UCHAR *b_next = b + TunPacketAlign(sizeof(TUN_PACKET) + p_size);
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if (b_next > b_end)
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return STATUS_BUFFER_TOO_SMALL;
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TUN_PACKET *p = (TUN_PACKET *)b;
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p->Size = p_size;
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void *ptr = NdisGetDataBuffer(nb, p_size, p->Data, 1, 0);
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if (!ptr)
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return NDIS_STATUS_RESOURCES;
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if (ptr != p->Data)
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NdisMoveMemory(p->Data, ptr, p_size);
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Irp->IoStatus.Information = b_next - buffer;
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return STATUS_SUCCESS;
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}
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#define NET_BUFFER_LIST_MINIPORT_RESERVED_REFCOUNT(nbl) ((volatile LONG64 *)NET_BUFFER_LIST_MINIPORT_RESERVED(nbl))
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_IRQL_requires_same_
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static void TunNBLRefInit(_Inout_ TUN_CTX *ctx, _Inout_ NET_BUFFER_LIST *nbl)
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{
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InterlockedAdd64(&ctx->ActiveTransactionCount, 1);
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InterlockedAdd(&ctx->PacketQueue.NumNbl, 1);
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InterlockedExchange64(NET_BUFFER_LIST_MINIPORT_RESERVED_REFCOUNT(nbl), 1);
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}
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_IRQL_requires_same_
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static void TunNBLRefInc(_Inout_ NET_BUFFER_LIST *nbl)
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{
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ASSERT(InterlockedGet64(NET_BUFFER_LIST_MINIPORT_RESERVED_REFCOUNT(nbl)));
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InterlockedAdd64(NET_BUFFER_LIST_MINIPORT_RESERVED_REFCOUNT(nbl), 1);
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}
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_When_( (SendCompleteFlags & NDIS_SEND_COMPLETE_FLAGS_DISPATCH_LEVEL), _IRQL_requires_ (DISPATCH_LEVEL))
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_When_(!(SendCompleteFlags & NDIS_SEND_COMPLETE_FLAGS_DISPATCH_LEVEL), _IRQL_requires_max_(DISPATCH_LEVEL))
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static BOOLEAN TunNBLRefDec(_Inout_ TUN_CTX *ctx, _Inout_ NET_BUFFER_LIST *nbl, _In_ ULONG SendCompleteFlags)
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{
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ASSERT(InterlockedGet64(NET_BUFFER_LIST_MINIPORT_RESERVED_REFCOUNT(nbl)));
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if (!InterlockedSubtract64(NET_BUFFER_LIST_MINIPORT_RESERVED_REFCOUNT(nbl), 1)) {
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NET_BUFFER_LIST_NEXT_NBL(nbl) = NULL;
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NdisMSendNetBufferListsComplete(ctx->MiniportAdapterHandle, nbl, SendCompleteFlags);
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InterlockedSubtract(&ctx->PacketQueue.NumNbl, 1);
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TunCompletePause(ctx, 1);
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return TRUE;
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}
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return FALSE;
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}
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_IRQL_requires_same_
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static void TunAppendNBL(_Inout_ NET_BUFFER_LIST **head, _Inout_ NET_BUFFER_LIST **tail, __drv_aliasesMem _In_ NET_BUFFER_LIST *nbl)
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{
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*(*tail ? &NET_BUFFER_LIST_NEXT_NBL(*tail) : head) = nbl;
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*tail = nbl;
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NET_BUFFER_LIST_NEXT_NBL(nbl) = NULL;
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}
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_Requires_lock_not_held_(ctx->PacketQueue.Lock)
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_IRQL_requires_max_(DISPATCH_LEVEL)
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static void TunQueueAppend(_Inout_ TUN_CTX *ctx, _In_ NET_BUFFER_LIST *nbl, _In_ UINT max_nbls)
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{
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for (NET_BUFFER_LIST *nbl_next; nbl; nbl = nbl_next) {
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nbl_next = NET_BUFFER_LIST_NEXT_NBL(nbl);
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if (!NET_BUFFER_LIST_FIRST_NB(nbl)) {
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NET_BUFFER_LIST_NEXT_NBL(nbl) = NULL;
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NdisMSendNetBufferListsComplete(ctx->MiniportAdapterHandle, nbl, 0);
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continue;
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}
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KLOCK_QUEUE_HANDLE lqh;
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KeAcquireInStackQueuedSpinLock(&ctx->PacketQueue.Lock, &lqh);
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TunNBLRefInit(ctx, nbl);
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TunAppendNBL(&ctx->PacketQueue.FirstNbl, &ctx->PacketQueue.LastNbl, nbl);
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while ((UINT)InterlockedGet(&ctx->PacketQueue.NumNbl) > max_nbls && ctx->PacketQueue.FirstNbl) {
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NET_BUFFER_LIST *nbl_second = NET_BUFFER_LIST_NEXT_NBL(ctx->PacketQueue.FirstNbl);
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NET_BUFFER_LIST_STATUS(ctx->PacketQueue.FirstNbl) = NDIS_STATUS_SEND_ABORTED;
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TunNBLRefDec(ctx, ctx->PacketQueue.FirstNbl, NDIS_SEND_COMPLETE_FLAGS_DISPATCH_LEVEL);
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ctx->PacketQueue.NextNb = NULL;
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ctx->PacketQueue.FirstNbl = nbl_second;
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if (!ctx->PacketQueue.FirstNbl)
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ctx->PacketQueue.LastNbl = NULL;
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}
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KeReleaseInStackQueuedSpinLock(&lqh);
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}
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}
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_Requires_lock_held_(ctx->PacketQueue.Lock)
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_IRQL_requires_(DISPATCH_LEVEL)
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static NET_BUFFER *TunQueueRemove(_Inout_ TUN_CTX *ctx, _Out_ NET_BUFFER_LIST **nbl)
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{
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NET_BUFFER_LIST *nbl_top;
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NET_BUFFER *ret;
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|
|
nbl_top = ctx->PacketQueue.FirstNbl;
|
|
*nbl = nbl_top;
|
|
if (!nbl_top)
|
|
return NULL;
|
|
if (!ctx->PacketQueue.NextNb)
|
|
ctx->PacketQueue.NextNb = NET_BUFFER_LIST_FIRST_NB(nbl_top);
|
|
ret = ctx->PacketQueue.NextNb;
|
|
ctx->PacketQueue.NextNb = NET_BUFFER_NEXT_NB(ret);
|
|
if (!ctx->PacketQueue.NextNb) {
|
|
ctx->PacketQueue.FirstNbl = NET_BUFFER_LIST_NEXT_NBL(nbl_top);
|
|
if (!ctx->PacketQueue.FirstNbl)
|
|
ctx->PacketQueue.LastNbl = NULL;
|
|
NET_BUFFER_LIST_NEXT_NBL(nbl_top) = NULL;
|
|
} else
|
|
TunNBLRefInc(nbl_top);
|
|
return ret;
|
|
}
|
|
|
|
/* Note: Must be called immediately after TunQueueRemove without dropping ctx->PacketQueue.Lock. */
|
|
_Requires_lock_held_(ctx->PacketQueue.Lock)
|
|
_IRQL_requires_(DISPATCH_LEVEL)
|
|
static void TunQueuePrepend(_Inout_ TUN_CTX *ctx, _In_ NET_BUFFER *nb, _In_ NET_BUFFER_LIST *nbl)
|
|
{
|
|
ctx->PacketQueue.NextNb = nb;
|
|
|
|
if (!nbl || nbl == ctx->PacketQueue.FirstNbl)
|
|
return;
|
|
|
|
TunNBLRefInc(nbl);
|
|
if (!ctx->PacketQueue.FirstNbl)
|
|
ctx->PacketQueue.FirstNbl = ctx->PacketQueue.LastNbl = nbl;
|
|
else {
|
|
NET_BUFFER_LIST_NEXT_NBL(nbl) = ctx->PacketQueue.FirstNbl;
|
|
ctx->PacketQueue.FirstNbl = nbl;
|
|
}
|
|
}
|
|
|
|
_Requires_lock_not_held_(ctx->PacketQueue.Lock)
|
|
_IRQL_requires_max_(DISPATCH_LEVEL)
|
|
static void TunQueueProcess(_Inout_ TUN_CTX *ctx)
|
|
{
|
|
IRP *irp = NULL;
|
|
NET_BUFFER *nb;
|
|
KLOCK_QUEUE_HANDLE lqh;
|
|
|
|
for (;;) {
|
|
NET_BUFFER_LIST *nbl;
|
|
NTSTATUS status = STATUS_SUCCESS;
|
|
|
|
KeAcquireInStackQueuedSpinLock(&ctx->PacketQueue.Lock, &lqh);
|
|
if (!irp) {
|
|
nb = TunQueueRemove(ctx, &nbl);
|
|
if (!nb) {
|
|
KeReleaseInStackQueuedSpinLock(&lqh);
|
|
return;
|
|
}
|
|
irp = IoCsqRemoveNextIrp(&ctx->Device.ReadQueue.Csq, NULL);
|
|
if (!irp) {
|
|
TunQueuePrepend(ctx, nb, nbl);
|
|
KeReleaseInStackQueuedSpinLock(&lqh);
|
|
if (nbl)
|
|
TunNBLRefDec(ctx, nbl, 0);
|
|
return;
|
|
}
|
|
} else
|
|
nb = TunQueueRemove(ctx, &nbl);
|
|
|
|
if (!TunCanFitIntoIrp(irp, nb)) {
|
|
TunQueuePrepend(ctx, nb, nbl);
|
|
if (nbl)
|
|
TunNBLRefDec(ctx, nbl, NDIS_SEND_COMPLETE_FLAGS_DISPATCH_LEVEL);
|
|
nbl = NULL;
|
|
nb = NULL;
|
|
}
|
|
|
|
KeReleaseInStackQueuedSpinLock(&lqh);
|
|
|
|
if (!nb || (status = TunWriteIntoIrp(irp, nb)) == STATUS_BUFFER_TOO_SMALL) { /* irp complete */
|
|
irp->IoStatus.Status = STATUS_SUCCESS;
|
|
IoCompleteRequest(irp, IO_NETWORK_INCREMENT);
|
|
TunCompletePause(ctx, 1);
|
|
irp = NULL;
|
|
} else if (status == NDIS_STATUS_INVALID_LENGTH || status == NDIS_STATUS_RESOURCES) { /* nb-related errors */
|
|
if (nbl)
|
|
NET_BUFFER_LIST_STATUS(nbl) = status;
|
|
IoCsqInsertIrpEx(&ctx->Device.ReadQueue.Csq, irp, NULL, TUN_CSQ_INSERT_HEAD);
|
|
irp = NULL;
|
|
} else if (!NT_SUCCESS(status)) { /* irp-related errors */
|
|
irp->IoStatus.Status = status;
|
|
IoCompleteRequest(irp, IO_NO_INCREMENT);
|
|
TunCompletePause(ctx, 1);
|
|
irp = NULL;
|
|
}
|
|
if (nbl)
|
|
TunNBLRefDec(ctx, nbl, 0);
|
|
}
|
|
}
|
|
|
|
static DRIVER_DISPATCH TunDispatchCreate;
|
|
_Use_decl_annotations_
|
|
static NTSTATUS TunDispatchCreate(DEVICE_OBJECT *DeviceObject, IRP *Irp)
|
|
{
|
|
NTSTATUS status = STATUS_UNSUCCESSFUL;
|
|
|
|
TUN_CTX *ctx = TunGetContext(DeviceObject);
|
|
if (!ctx) {
|
|
status = STATUS_INVALID_HANDLE;
|
|
goto cleanup_complete_req;
|
|
}
|
|
|
|
if (!NT_SUCCESS(status = TunCheckForPause(ctx, 1)))
|
|
goto cleanup_TunCompletePause;
|
|
|
|
ASSERT(InterlockedGet64(&ctx->Device.RefCount) < MAXLONG64);
|
|
InterlockedIncrement64(&ctx->Device.RefCount);
|
|
TunIndicateStatus(ctx);
|
|
|
|
cleanup_TunCompletePause:
|
|
TunCompletePause(ctx, 1);
|
|
cleanup_complete_req:
|
|
TunCompleteRequest(Irp, 0, status);
|
|
return status;
|
|
}
|
|
|
|
static DRIVER_DISPATCH TunDispatchClose;
|
|
_Use_decl_annotations_
|
|
static NTSTATUS TunDispatchClose(DEVICE_OBJECT *DeviceObject, IRP *Irp)
|
|
{
|
|
NTSTATUS status = STATUS_UNSUCCESSFUL;
|
|
|
|
TUN_CTX *ctx = TunGetContext(DeviceObject);
|
|
if (!ctx) {
|
|
status = STATUS_INVALID_HANDLE;
|
|
goto cleanup_complete_req;
|
|
}
|
|
|
|
if (!NT_SUCCESS(status = TunCheckForPause(ctx, 1)))
|
|
goto cleanup_TunCompletePause;
|
|
|
|
ASSERT(InterlockedGet64(&ctx->Device.RefCount) > 0);
|
|
InterlockedDecrement64(&ctx->Device.RefCount);
|
|
TunIndicateStatus(ctx);
|
|
|
|
cleanup_TunCompletePause:
|
|
TunCompletePause(ctx, 1);
|
|
cleanup_complete_req:
|
|
TunCompleteRequest(Irp, 0, status);
|
|
return status;
|
|
}
|
|
|
|
static DRIVER_DISPATCH TunDispatchRead;
|
|
_Use_decl_annotations_
|
|
static NTSTATUS TunDispatchRead(DEVICE_OBJECT *DeviceObject, IRP *Irp)
|
|
{
|
|
NTSTATUS status = STATUS_UNSUCCESSFUL;
|
|
|
|
TUN_CTX *ctx = TunGetContext(DeviceObject);
|
|
if (!ctx) {
|
|
status = STATUS_INVALID_HANDLE;
|
|
goto cleanup_complete_req;
|
|
}
|
|
|
|
if (!NT_SUCCESS(status = TunCheckForPause(ctx, 1)))
|
|
goto cleanup_TunCompletePause;
|
|
|
|
Irp->IoStatus.Information = 0;
|
|
InterlockedIncrement64(&ctx->ActiveTransactionCount);
|
|
status = IoCsqInsertIrpEx(&ctx->Device.ReadQueue.Csq, Irp, NULL, TUN_CSQ_INSERT_TAIL);
|
|
if (!NT_SUCCESS(status)) {
|
|
InterlockedDecrement64(&ctx->ActiveTransactionCount);
|
|
goto cleanup_TunCompletePause;
|
|
}
|
|
|
|
TunQueueProcess(ctx);
|
|
|
|
TunCompletePause(ctx, 1);
|
|
return STATUS_PENDING;
|
|
|
|
cleanup_TunCompletePause:
|
|
TunCompletePause(ctx, 1);
|
|
cleanup_complete_req:
|
|
TunCompleteRequest(Irp, 0, status);
|
|
return status;
|
|
}
|
|
|
|
static DRIVER_DISPATCH TunDispatchWrite;
|
|
_Use_decl_annotations_
|
|
static NTSTATUS TunDispatchWrite(DEVICE_OBJECT *DeviceObject, IRP *Irp)
|
|
{
|
|
NTSTATUS status = STATUS_UNSUCCESSFUL;
|
|
ULONG_PTR information = 0;
|
|
|
|
TUN_CTX *ctx = TunGetContext(DeviceObject);
|
|
if (!ctx) {
|
|
status = STATUS_INVALID_HANDLE;
|
|
goto cleanup_complete_req;
|
|
}
|
|
|
|
if (!NT_SUCCESS(status = TunCheckForPause(ctx, 1)))
|
|
goto cleanup_TunCompletePause;
|
|
|
|
UCHAR *buffer = NULL;
|
|
ULONG size = 0;
|
|
status = TunGetIRPBuffer(Irp, &buffer, &size);
|
|
if (!NT_SUCCESS(status))
|
|
goto cleanup_TunCompletePause;
|
|
|
|
const UCHAR *b = buffer, *b_end = buffer + size;
|
|
ULONG nbl_count = 0;
|
|
NET_BUFFER_LIST *nbl_head = NULL, *nbl_tail = NULL;
|
|
LONG64 stat_size = 0, stat_p_ok = 0, stat_p_err = 0;
|
|
while (b < b_end) {
|
|
TUN_PACKET *p = (TUN_PACKET *)b;
|
|
if (p->Size > TUN_EXCH_MAX_IP_PACKET_SIZE)
|
|
break;
|
|
UINT p_size = TunPacketAlign(sizeof(TUN_PACKET) + p->Size);
|
|
if (b + p_size > b_end)
|
|
break;
|
|
|
|
ULONG nbl_flags;
|
|
USHORT nbl_proto;
|
|
if (p->Size >= 20 && p->Data[0] >> 4 == 4) {
|
|
nbl_flags = NDIS_NBL_FLAGS_IS_IPV4;
|
|
nbl_proto = NDIS_ETH_TYPE_IPV4;
|
|
} else if (p->Size >= 40 && p->Data[0] >> 4 == 6) {
|
|
nbl_flags = NDIS_NBL_FLAGS_IS_IPV6;
|
|
nbl_proto = NDIS_ETH_TYPE_IPV6;
|
|
} else {
|
|
goto skip_packet;
|
|
}
|
|
|
|
MDL *mdl = NdisAllocateMdl(ctx->MiniportAdapterHandle, p->Data, p->Size);
|
|
if (!mdl)
|
|
goto skip_packet;
|
|
|
|
NET_BUFFER_LIST *nbl = NdisAllocateNetBufferAndNetBufferList(ctx->NBLPool, 0, 0, mdl, 0, p->Size);
|
|
if (!nbl)
|
|
goto cleanup_NdisFreeMdl;
|
|
|
|
nbl->SourceHandle = ctx->MiniportAdapterHandle;
|
|
NdisSetNblFlag(nbl, nbl_flags);
|
|
NET_BUFFER_LIST_INFO(nbl, NetBufferListFrameType) = (PVOID)TunHtons(nbl_proto);
|
|
NET_BUFFER_LIST_STATUS(nbl) = NDIS_STATUS_SUCCESS;
|
|
TunAppendNBL(&nbl_head, &nbl_tail, nbl);
|
|
nbl_count++;
|
|
goto next_packet;
|
|
|
|
cleanup_NdisFreeMdl:
|
|
NdisFreeMdl(mdl);
|
|
skip_packet:
|
|
stat_p_err++;
|
|
next_packet:
|
|
b += p_size;
|
|
}
|
|
|
|
/* Commentary from Jason:
|
|
*
|
|
* Problem statement:
|
|
* We call IoCompleteRequest(Irp) immediately after NdisMIndicateReceiveNetBufferLists, which frees Irp->MdlAddress.
|
|
* Since we've just given the same memory to NdisMIndicateReceiveNetBufferLists (in a different MDL), we wind up
|
|
* freeing the memory before NDIS finishes processing them.
|
|
*
|
|
* Fix possibility 1:
|
|
* Move IoCompleteRequest(Irp) to TunReturnNetBufferLists. This reqiures reference counting how many NBLs are currently
|
|
* in flight that are using an IRP. When that drops to zero, we can call IoCompleteRequest(Irp).
|
|
* Problem:
|
|
* This means we have to block future wireguard-go Writes until *all* NBLs have completed processing in the networking
|
|
* stack. Is that safe to do? Will that introduce latency? Can userspace processes sabotage it by refusing to read from
|
|
* a TCP socket buffer? We don't know enough about how NdisMIndicateReceiveNetBufferLists works to assess its
|
|
* characteristics here.
|
|
*
|
|
* Fix possibility 2:
|
|
* Use NDIS_RECEIVE_FLAGS_RESOURCES, so that NdisMIndicateReceiveNetBufferLists makes a copy, and then we'll simply
|
|
* free everything immediately after. This is slow, and it could potentially lead to wireguard-go making the kernel
|
|
* allocate lots of memory in the case that NdisAllocateNetBufferAndNetBufferList doesn't ratelimit its creation in the
|
|
* same way Linux's skb_alloc does. However, it does make the lifetime of Irps shorter, which is easier to analyze, and
|
|
* it might lead to better latency, since we don't need to wait until userspace sends its next packets, so long as
|
|
* Ndis' ingestion queue doesn't become too large.
|
|
*
|
|
* Choice:
|
|
* Both (1) and (2) have pros and cons. Making (1) work is clearly the better long term goal. But we lack the knowledge
|
|
* to make it work correctly. (2) seems like an acceptable stopgap solution until we're smart enough to reason about
|
|
* (1). So, let's implement (2) now, and we'll let more knowledgeable people advise us on (1) later.
|
|
*/
|
|
if (nbl_head)
|
|
NdisMIndicateReceiveNetBufferLists(ctx->MiniportAdapterHandle, nbl_head, NDIS_DEFAULT_PORT_NUMBER, nbl_count, NDIS_RECEIVE_FLAGS_RESOURCES);
|
|
|
|
for (NET_BUFFER_LIST *nbl = nbl_head, *nbl_next; nbl; nbl = nbl_next) {
|
|
nbl_next = NET_BUFFER_LIST_NEXT_NBL(nbl);
|
|
NET_BUFFER_LIST_NEXT_NBL(nbl) = NULL;
|
|
|
|
MDL *mdl = NET_BUFFER_FIRST_MDL(NET_BUFFER_LIST_FIRST_NB(nbl));
|
|
if (NT_SUCCESS(NET_BUFFER_LIST_STATUS(nbl))) {
|
|
ULONG p_size = MmGetMdlByteCount(mdl);
|
|
stat_size += p_size;
|
|
stat_p_ok++;
|
|
} else
|
|
stat_p_err++;
|
|
NdisFreeMdl(mdl);
|
|
NdisFreeNetBufferList(nbl);
|
|
}
|
|
|
|
InterlockedAdd64((LONG64 *)&ctx->Statistics.ifHCInOctets, stat_size);
|
|
InterlockedAdd64((LONG64 *)&ctx->Statistics.ifHCInUcastOctets, stat_size);
|
|
InterlockedAdd64((LONG64 *)&ctx->Statistics.ifHCInUcastPkts, stat_p_ok);
|
|
InterlockedAdd64((LONG64 *)&ctx->Statistics.ifInErrors, stat_p_err);
|
|
|
|
information = b - buffer;
|
|
|
|
cleanup_TunCompletePause:
|
|
TunCompletePause(ctx, 1);
|
|
cleanup_complete_req:
|
|
TunCompleteRequest(Irp, information, status);
|
|
return status;
|
|
}
|
|
|
|
static DRIVER_DISPATCH TunDispatchCleanup;
|
|
_Use_decl_annotations_
|
|
static NTSTATUS TunDispatchCleanup(DEVICE_OBJECT *DeviceObject, IRP *Irp)
|
|
{
|
|
NTSTATUS status = STATUS_UNSUCCESSFUL;
|
|
|
|
TUN_CTX *ctx = TunGetContext(DeviceObject);
|
|
if (!ctx) {
|
|
status = STATUS_INVALID_HANDLE;
|
|
goto cleanup_complete_req;
|
|
}
|
|
|
|
LONG64 count = 1;
|
|
if (!NT_SUCCESS(status = TunCheckForPause(ctx, count)))
|
|
goto cleanup_TunCompletePause;
|
|
|
|
IO_STACK_LOCATION *stack = IoGetCurrentIrpStackLocation(Irp);
|
|
IRP *pending_irp;
|
|
while ((pending_irp = IoCsqRemoveNextIrp(&ctx->Device.ReadQueue.Csq, stack->FileObject)) != NULL) {
|
|
count++;
|
|
TunCompleteRequest(pending_irp, 0, STATUS_CANCELLED);
|
|
}
|
|
|
|
cleanup_TunCompletePause:
|
|
TunCompletePause(ctx, count);
|
|
cleanup_complete_req:
|
|
TunCompleteRequest(Irp, 0, status);
|
|
return status;
|
|
}
|
|
|
|
static MINIPORT_SET_OPTIONS TunSetOptions;
|
|
_Use_decl_annotations_
|
|
static NDIS_STATUS TunSetOptions(NDIS_HANDLE NdisDriverHandle, NDIS_HANDLE DriverContext)
|
|
{
|
|
/* TODO: This handler is optional. See if it can be removed. */
|
|
return NDIS_STATUS_SUCCESS;
|
|
}
|
|
|
|
static MINIPORT_PAUSE TunPause;
|
|
_Use_decl_annotations_
|
|
static NDIS_STATUS TunPause(NDIS_HANDLE MiniportAdapterContext, PNDIS_MINIPORT_PAUSE_PARAMETERS MiniportPauseParameters)
|
|
{
|
|
TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext;
|
|
|
|
LONG64 count = 1;
|
|
InterlockedAdd64(&ctx->ActiveTransactionCount, count);
|
|
|
|
if (InterlockedCompareExchange((LONG *)&ctx->State, TUN_STATE_PAUSING, TUN_STATE_RUNNING) != TUN_STATE_RUNNING) {
|
|
InterlockedDecrement64(&ctx->ActiveTransactionCount);
|
|
return NDIS_STATUS_FAILURE;
|
|
}
|
|
|
|
KLOCK_QUEUE_HANDLE lqh;
|
|
KeAcquireInStackQueuedSpinLock(&ctx->PacketQueue.Lock, &lqh);
|
|
for (NET_BUFFER_LIST *nbl = ctx->PacketQueue.FirstNbl, *nbl_next; nbl; nbl = nbl_next) {
|
|
nbl_next = NET_BUFFER_LIST_NEXT_NBL(nbl);
|
|
NET_BUFFER_LIST_STATUS(nbl) = STATUS_NDIS_PAUSED;
|
|
TunNBLRefDec(ctx, nbl, NDIS_SEND_COMPLETE_FLAGS_DISPATCH_LEVEL);
|
|
}
|
|
ctx->PacketQueue.FirstNbl = NULL;
|
|
ctx->PacketQueue.LastNbl = NULL;
|
|
ctx->PacketQueue.NextNb = NULL;
|
|
InterlockedExchange(&ctx->PacketQueue.NumNbl, 0);
|
|
KeReleaseInStackQueuedSpinLock(&lqh);
|
|
|
|
/* Cancel pending IRPs to unblock waiting clients. */
|
|
IRP *pending_irp;
|
|
while ((pending_irp = IoCsqRemoveNextIrp(&ctx->Device.ReadQueue.Csq, NULL)) != NULL) {
|
|
count++;
|
|
TunCompleteRequest(pending_irp, 0, STATUS_CANCELLED);
|
|
}
|
|
|
|
return TunCompletePause(ctx, count);
|
|
}
|
|
|
|
static MINIPORT_RESTART TunRestart;
|
|
_Use_decl_annotations_
|
|
static NDIS_STATUS TunRestart(NDIS_HANDLE MiniportAdapterContext, PNDIS_MINIPORT_RESTART_PARAMETERS MiniportRestartParameters)
|
|
{
|
|
TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext;
|
|
if (InterlockedCompareExchange((LONG *)&ctx->State, TUN_STATE_RESTARTING, TUN_STATE_PAUSED) != TUN_STATE_PAUSED)
|
|
return NDIS_STATUS_FAILURE;
|
|
|
|
ASSERT(!InterlockedGet64(&ctx->Device.RefCount));
|
|
TunIndicateStatus(ctx);
|
|
|
|
InterlockedExchange((LONG *)&ctx->State, TUN_STATE_RUNNING);
|
|
return NDIS_STATUS_SUCCESS;
|
|
}
|
|
|
|
static MINIPORT_RETURN_NET_BUFFER_LISTS TunReturnNetBufferLists;
|
|
_Use_decl_annotations_
|
|
static void TunReturnNetBufferLists(NDIS_HANDLE MiniportAdapterContext, PNET_BUFFER_LIST NetBufferLists, ULONG ReturnFlags)
|
|
{
|
|
ASSERTMSG("TunReturnNetBufferLists() should not be called as NBLs are delivered using NDIS_RECEIVE_FLAGS_RESOURCES flag in NdisMIndicateReceiveNetBufferLists().", 0);
|
|
}
|
|
|
|
static MINIPORT_CANCEL_SEND TunCancelSend;
|
|
_Use_decl_annotations_
|
|
static void TunCancelSend(NDIS_HANDLE MiniportAdapterContext, PVOID CancelId)
|
|
{
|
|
TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext;
|
|
KLOCK_QUEUE_HANDLE lqh;
|
|
|
|
KeAcquireInStackQueuedSpinLock(&ctx->PacketQueue.Lock, &lqh);
|
|
|
|
NET_BUFFER_LIST *nbl_last = NULL, **nbl_last_link = &ctx->PacketQueue.FirstNbl;
|
|
for (NET_BUFFER_LIST *nbl = ctx->PacketQueue.FirstNbl, *nbl_next; nbl; nbl = nbl_next) {
|
|
nbl_next = NET_BUFFER_LIST_NEXT_NBL(nbl);
|
|
if (NDIS_GET_NET_BUFFER_LIST_CANCEL_ID(nbl) == CancelId) {
|
|
*nbl_last_link = nbl_next;
|
|
TunNBLRefDec(ctx, nbl, NDIS_SEND_COMPLETE_FLAGS_DISPATCH_LEVEL);
|
|
} else {
|
|
nbl_last = nbl;
|
|
nbl_last_link = &NET_BUFFER_LIST_NEXT_NBL(nbl);
|
|
}
|
|
}
|
|
ctx->PacketQueue.LastNbl = nbl_last;
|
|
|
|
KeReleaseInStackQueuedSpinLock(&lqh);
|
|
}
|
|
|
|
static MINIPORT_DEVICE_PNP_EVENT_NOTIFY TunDevicePnPEventNotify;
|
|
_Use_decl_annotations_
|
|
static void TunDevicePnPEventNotify(NDIS_HANDLE MiniportAdapterContext, PNET_DEVICE_PNP_EVENT NetDevicePnPEvent)
|
|
{
|
|
}
|
|
|
|
static MINIPORT_SHUTDOWN TunShutdownEx;
|
|
_Use_decl_annotations_
|
|
static void TunShutdownEx(NDIS_HANDLE MiniportAdapterContext, NDIS_SHUTDOWN_ACTION ShutdownAction)
|
|
{
|
|
TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext;
|
|
|
|
if (ShutdownAction == NdisShutdownBugCheck)
|
|
return;
|
|
|
|
InterlockedExchange((LONG *)&ctx->State, TUN_STATE_SHUTDOWN);
|
|
}
|
|
|
|
static MINIPORT_CANCEL_DIRECT_OID_REQUEST TunCancelDirectOidRequest;
|
|
_Use_decl_annotations_
|
|
static void TunCancelDirectOidRequest(NDIS_HANDLE MiniportAdapterContext, PVOID RequestId)
|
|
{
|
|
}
|
|
|
|
static MINIPORT_CANCEL_OID_REQUEST TunCancelOidRequest;
|
|
_Use_decl_annotations_
|
|
static void TunCancelOidRequest(NDIS_HANDLE MiniportAdapterContext, PVOID RequestId)
|
|
{
|
|
}
|
|
|
|
static MINIPORT_INITIALIZE TunInitializeEx;
|
|
_Use_decl_annotations_
|
|
static NDIS_STATUS TunInitializeEx(NDIS_HANDLE MiniportAdapterHandle, NDIS_HANDLE MiniportDriverContext, PNDIS_MINIPORT_INIT_PARAMETERS MiniportInitParameters)
|
|
{
|
|
NDIS_STATUS status;
|
|
|
|
if (!MiniportAdapterHandle)
|
|
return NDIS_STATUS_FAILURE;
|
|
|
|
TUN_CTX *ctx;
|
|
#pragma warning(suppress: 6014) /* Leaking memory 'ctx'. Note: 'ctx' is aliased in attr.MiniportAdapterContext; or freed on failure. */
|
|
if (!NT_SUCCESS(NdisAllocateMemoryWithTag(&ctx, sizeof(TUN_CTX), TUN_MEMORY_TAG)))
|
|
return NDIS_STATUS_FAILURE;
|
|
|
|
NdisZeroMemory(ctx, sizeof(*ctx));
|
|
ctx->State = TUN_STATE_INITIALIZING;
|
|
ctx->PowerState = NdisDeviceStateD0;
|
|
ctx->MiniportAdapterHandle = MiniportAdapterHandle;
|
|
|
|
ctx->Statistics.Header.Type = NDIS_OBJECT_TYPE_DEFAULT;
|
|
ctx->Statistics.Header.Revision = NDIS_STATISTICS_INFO_REVISION_1;
|
|
ctx->Statistics.Header.Size = NDIS_SIZEOF_STATISTICS_INFO_REVISION_1;
|
|
ctx->Statistics.SupportedStatistics =
|
|
NDIS_STATISTICS_FLAGS_VALID_DIRECTED_FRAMES_RCV |
|
|
NDIS_STATISTICS_FLAGS_VALID_MULTICAST_FRAMES_RCV |
|
|
NDIS_STATISTICS_FLAGS_VALID_BROADCAST_FRAMES_RCV |
|
|
NDIS_STATISTICS_FLAGS_VALID_BYTES_RCV |
|
|
NDIS_STATISTICS_FLAGS_VALID_RCV_DISCARDS |
|
|
NDIS_STATISTICS_FLAGS_VALID_RCV_ERROR |
|
|
NDIS_STATISTICS_FLAGS_VALID_DIRECTED_FRAMES_XMIT |
|
|
NDIS_STATISTICS_FLAGS_VALID_MULTICAST_FRAMES_XMIT |
|
|
NDIS_STATISTICS_FLAGS_VALID_BROADCAST_FRAMES_XMIT |
|
|
NDIS_STATISTICS_FLAGS_VALID_BYTES_XMIT |
|
|
NDIS_STATISTICS_FLAGS_VALID_XMIT_ERROR |
|
|
NDIS_STATISTICS_FLAGS_VALID_XMIT_DISCARDS |
|
|
NDIS_STATISTICS_FLAGS_VALID_DIRECTED_BYTES_RCV |
|
|
NDIS_STATISTICS_FLAGS_VALID_MULTICAST_BYTES_RCV |
|
|
NDIS_STATISTICS_FLAGS_VALID_BROADCAST_BYTES_RCV |
|
|
NDIS_STATISTICS_FLAGS_VALID_DIRECTED_BYTES_XMIT |
|
|
NDIS_STATISTICS_FLAGS_VALID_MULTICAST_BYTES_XMIT |
|
|
NDIS_STATISTICS_FLAGS_VALID_BROADCAST_BYTES_XMIT;
|
|
|
|
NDIS_MINIPORT_ADAPTER_REGISTRATION_ATTRIBUTES attr = {
|
|
.Header = {
|
|
.Type = NDIS_OBJECT_TYPE_MINIPORT_ADAPTER_REGISTRATION_ATTRIBUTES,
|
|
.Revision = NDIS_MINIPORT_ADAPTER_REGISTRATION_ATTRIBUTES_REVISION_1,
|
|
.Size = NDIS_SIZEOF_MINIPORT_ADAPTER_REGISTRATION_ATTRIBUTES_REVISION_1
|
|
},
|
|
.AttributeFlags = NDIS_MINIPORT_ATTRIBUTES_NO_HALT_ON_SUSPEND,
|
|
.InterfaceType = NdisInterfaceInternal,
|
|
.MiniportAdapterContext = ctx
|
|
};
|
|
if (!NT_SUCCESS(NdisMSetMiniportAttributes(MiniportAdapterHandle, (PNDIS_MINIPORT_ADAPTER_ATTRIBUTES)&attr))) {
|
|
status = NDIS_STATUS_FAILURE;
|
|
goto cleanup_ctx;
|
|
}
|
|
|
|
NDIS_PM_CAPABILITIES pmcap = {
|
|
.Header = {
|
|
.Type = NDIS_OBJECT_TYPE_DEFAULT,
|
|
.Revision = NDIS_PM_CAPABILITIES_REVISION_1,
|
|
.Size = NDIS_SIZEOF_NDIS_PM_CAPABILITIES_REVISION_1
|
|
},
|
|
.MinMagicPacketWakeUp = NdisDeviceStateUnspecified,
|
|
.MinPatternWakeUp = NdisDeviceStateUnspecified,
|
|
.MinLinkChangeWakeUp = NdisDeviceStateUnspecified
|
|
};
|
|
static NDIS_OID suported_oids[] = {
|
|
OID_GEN_MAXIMUM_TOTAL_SIZE,
|
|
OID_GEN_CURRENT_LOOKAHEAD,
|
|
OID_GEN_TRANSMIT_BUFFER_SPACE,
|
|
OID_GEN_RECEIVE_BUFFER_SPACE,
|
|
OID_GEN_TRANSMIT_BLOCK_SIZE,
|
|
OID_GEN_RECEIVE_BLOCK_SIZE,
|
|
OID_GEN_VENDOR_DESCRIPTION,
|
|
OID_GEN_VENDOR_ID,
|
|
OID_GEN_VENDOR_DRIVER_VERSION,
|
|
OID_GEN_XMIT_OK,
|
|
OID_GEN_RCV_OK,
|
|
OID_GEN_CURRENT_PACKET_FILTER,
|
|
OID_GEN_STATISTICS,
|
|
OID_GEN_INTERRUPT_MODERATION,
|
|
OID_GEN_LINK_PARAMETERS,
|
|
OID_PNP_SET_POWER,
|
|
OID_PNP_QUERY_POWER
|
|
};
|
|
NDIS_MINIPORT_ADAPTER_GENERAL_ATTRIBUTES gen = {
|
|
.Header = {
|
|
.Type = NDIS_OBJECT_TYPE_MINIPORT_ADAPTER_GENERAL_ATTRIBUTES,
|
|
.Revision = NDIS_MINIPORT_ADAPTER_GENERAL_ATTRIBUTES_REVISION_2,
|
|
.Size = NDIS_SIZEOF_MINIPORT_ADAPTER_GENERAL_ATTRIBUTES_REVISION_2
|
|
},
|
|
.MediaType = NdisMediumIP,
|
|
.PhysicalMediumType = NdisPhysicalMediumUnspecified,
|
|
.MtuSize = TUN_EXCH_MAX_IP_PACKET_SIZE,
|
|
.MaxXmitLinkSpeed = TUN_LINK_SPEED,
|
|
.MaxRcvLinkSpeed = TUN_LINK_SPEED,
|
|
.RcvLinkSpeed = TUN_LINK_SPEED,
|
|
.XmitLinkSpeed = TUN_LINK_SPEED,
|
|
.MediaConnectState = MediaConnectStateDisconnected,
|
|
.LookaheadSize = TUN_EXCH_MAX_IP_PACKET_SIZE,
|
|
.MacOptions =
|
|
NDIS_MAC_OPTION_TRANSFERS_NOT_PEND |
|
|
NDIS_MAC_OPTION_COPY_LOOKAHEAD_DATA |
|
|
NDIS_MAC_OPTION_NO_LOOPBACK,
|
|
.SupportedPacketFilters =
|
|
NDIS_PACKET_TYPE_DIRECTED |
|
|
NDIS_PACKET_TYPE_ALL_MULTICAST |
|
|
NDIS_PACKET_TYPE_BROADCAST |
|
|
NDIS_PACKET_TYPE_ALL_LOCAL |
|
|
NDIS_PACKET_TYPE_ALL_FUNCTIONAL,
|
|
.AccessType = NET_IF_ACCESS_BROADCAST,
|
|
.DirectionType = NET_IF_DIRECTION_SENDRECEIVE,
|
|
.ConnectionType = NET_IF_CONNECTION_DEDICATED,
|
|
.IfType = IF_TYPE_PROP_VIRTUAL,
|
|
.IfConnectorPresent = FALSE,
|
|
.SupportedStatistics = ctx->Statistics.SupportedStatistics,
|
|
.SupportedPauseFunctions = NdisPauseFunctionsUnsupported,
|
|
.AutoNegotiationFlags =
|
|
NDIS_LINK_STATE_XMIT_LINK_SPEED_AUTO_NEGOTIATED |
|
|
NDIS_LINK_STATE_RCV_LINK_SPEED_AUTO_NEGOTIATED |
|
|
NDIS_LINK_STATE_DUPLEX_AUTO_NEGOTIATED |
|
|
NDIS_LINK_STATE_PAUSE_FUNCTIONS_AUTO_NEGOTIATED,
|
|
.SupportedOidList = suported_oids,
|
|
.SupportedOidListLength = sizeof(suported_oids),
|
|
.PowerManagementCapabilitiesEx = &pmcap
|
|
};
|
|
if (!NT_SUCCESS(NdisMSetMiniportAttributes(MiniportAdapterHandle, (PNDIS_MINIPORT_ADAPTER_ATTRIBUTES)&gen))) {
|
|
status = NDIS_STATUS_FAILURE;
|
|
goto cleanup_ctx;
|
|
}
|
|
|
|
KeInitializeSpinLock(&ctx->PacketQueue.Lock);
|
|
|
|
KeInitializeSpinLock(&ctx->Device.ReadQueue.Lock);
|
|
InitializeListHead(&ctx->Device.ReadQueue.List);
|
|
IoCsqInitializeEx(&ctx->Device.ReadQueue.Csq,
|
|
TunCsqInsertIrpEx,
|
|
TunCsqRemoveIrp,
|
|
TunCsqPeekNextIrp,
|
|
TunCsqAcquireLock,
|
|
TunCsqReleaseLock,
|
|
TunCsqCompleteCanceledIrp);
|
|
|
|
/* A miniport driver can call NdisMIndicateStatusEx after setting its
|
|
* registration attributes even if the driver is still in the context
|
|
* of the MiniportInitializeEx function.
|
|
*/
|
|
TunIndicateStatus(ctx);
|
|
|
|
NET_BUFFER_LIST_POOL_PARAMETERS nbl_pool_param = {
|
|
.Header = {
|
|
.Type = NDIS_OBJECT_TYPE_DEFAULT,
|
|
.Revision = NET_BUFFER_LIST_POOL_PARAMETERS_REVISION_1,
|
|
.Size = NDIS_SIZEOF_NET_BUFFER_LIST_POOL_PARAMETERS_REVISION_1
|
|
},
|
|
.ProtocolId = NDIS_PROTOCOL_ID_DEFAULT,
|
|
.fAllocateNetBuffer = TRUE,
|
|
.PoolTag = TUN_MEMORY_TAG
|
|
};
|
|
#pragma warning(suppress: 6014) /* Leaking memory 'ctx->NBLPool'. Note: 'ctx->NBLPool' is freed in TunHaltEx; or freed on failure. */
|
|
ctx->NBLPool = NdisAllocateNetBufferListPool(MiniportAdapterHandle, &nbl_pool_param);
|
|
if (!ctx->NBLPool) {
|
|
status = NDIS_STATUS_FAILURE;
|
|
goto cleanup_ctx;
|
|
}
|
|
|
|
WCHAR device_name[(sizeof(L"\\Device\\" TUN_DEVICE_NAME) + 10/*MAXULONG as string*/) / sizeof(WCHAR)];
|
|
UNICODE_STRING unicode_device_name;
|
|
TunInitUnicodeString(&unicode_device_name, device_name);
|
|
RtlUnicodeStringPrintf(&unicode_device_name, L"\\Device\\" TUN_DEVICE_NAME, (ULONG)MiniportInitParameters->NetLuid.Info.NetLuidIndex);
|
|
|
|
WCHAR symbolic_name[(sizeof(L"\\DosDevices\\" TUN_DEVICE_NAME) + 10/*MAXULONG as string*/) / sizeof(WCHAR)];
|
|
UNICODE_STRING unicode_symbolic_name;
|
|
TunInitUnicodeString(&unicode_symbolic_name, symbolic_name);
|
|
RtlUnicodeStringPrintf(&unicode_symbolic_name, L"\\DosDevices\\" TUN_DEVICE_NAME, (ULONG)MiniportInitParameters->NetLuid.Info.NetLuidIndex);
|
|
|
|
static PDRIVER_DISPATCH dispatch_table[IRP_MJ_MAXIMUM_FUNCTION + 1] = {
|
|
TunDispatchCreate, /* IRP_MJ_CREATE */
|
|
NULL, /* IRP_MJ_CREATE_NAMED_PIPE */
|
|
TunDispatchClose, /* IRP_MJ_CLOSE */
|
|
TunDispatchRead, /* IRP_MJ_READ */
|
|
TunDispatchWrite, /* IRP_MJ_WRITE */
|
|
NULL, /* IRP_MJ_QUERY_INFORMATION */
|
|
NULL, /* IRP_MJ_SET_INFORMATION */
|
|
NULL, /* IRP_MJ_QUERY_EA */
|
|
NULL, /* IRP_MJ_SET_EA */
|
|
NULL, /* IRP_MJ_FLUSH_BUFFERS */
|
|
NULL, /* IRP_MJ_QUERY_VOLUME_INFORMATION */
|
|
NULL, /* IRP_MJ_SET_VOLUME_INFORMATION */
|
|
NULL, /* IRP_MJ_DIRECTORY_CONTROL */
|
|
NULL, /* IRP_MJ_FILE_SYSTEM_CONTROL */
|
|
NULL, /* IRP_MJ_DEVICE_CONTROL */
|
|
NULL, /* IRP_MJ_INTERNAL_DEVICE_CONTROL */
|
|
NULL, /* IRP_MJ_SHUTDOWN */
|
|
NULL, /* IRP_MJ_LOCK_CONTROL */
|
|
TunDispatchCleanup, /* IRP_MJ_CLEANUP */
|
|
};
|
|
NDIS_DEVICE_OBJECT_ATTRIBUTES t = {
|
|
.Header = {
|
|
.Type = NDIS_OBJECT_TYPE_DEVICE_OBJECT_ATTRIBUTES,
|
|
.Revision = NDIS_DEVICE_OBJECT_ATTRIBUTES_REVISION_1,
|
|
.Size = NDIS_SIZEOF_DEVICE_OBJECT_ATTRIBUTES_REVISION_1
|
|
},
|
|
.DeviceName = &unicode_device_name,
|
|
.SymbolicName = &unicode_symbolic_name,
|
|
.MajorFunctions = dispatch_table,
|
|
.ExtensionSize = sizeof(TUN_CTX *),
|
|
.DefaultSDDLString = &SDDL_DEVOBJ_SYS_ALL /* Kernel, and SYSTEM: full control. Others: none */
|
|
};
|
|
if (!NT_SUCCESS(NdisRegisterDeviceEx(NdisMiniportDriverHandle, &t, &ctx->Device.Object, &ctx->Device.Handle))) {
|
|
status = NDIS_STATUS_FAILURE;
|
|
goto cleanup_NdisFreeNetBufferListPool;
|
|
}
|
|
|
|
ctx->Device.Object->Flags &= ~DO_BUFFERED_IO;
|
|
ctx->Device.Object->Flags |= DO_DIRECT_IO;
|
|
|
|
TUN_CTX * volatile * control_device_extension = TunGetContextPointer(ctx->Device.Object);
|
|
if (!control_device_extension) {
|
|
status = NDIS_STATUS_FAILURE;
|
|
goto cleanup_NdisDeregisterDeviceEx;
|
|
}
|
|
InterlockedExchangePointer(control_device_extension, ctx);
|
|
|
|
ctx->State = TUN_STATE_PAUSED;
|
|
return NDIS_STATUS_SUCCESS;
|
|
|
|
cleanup_NdisDeregisterDeviceEx:
|
|
NdisDeregisterDeviceEx(ctx->Device.Handle);
|
|
cleanup_NdisFreeNetBufferListPool:
|
|
NdisFreeNetBufferListPool(ctx->NBLPool);
|
|
cleanup_ctx:
|
|
NdisFreeMemory(ctx, 0, 0);
|
|
return status;
|
|
}
|
|
|
|
static MINIPORT_UNLOAD TunDriverUnload;
|
|
_Use_decl_annotations_
|
|
static VOID TunDriverUnload(PDRIVER_OBJECT DriverObject)
|
|
{
|
|
NdisMDeregisterMiniportDriver(NdisMiniportDriverHandle);
|
|
}
|
|
|
|
static MINIPORT_HALT TunHaltEx;
|
|
_Use_decl_annotations_
|
|
static void TunHaltEx(NDIS_HANDLE MiniportAdapterContext, NDIS_HALT_ACTION HaltAction)
|
|
{
|
|
TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext;
|
|
if (InterlockedGet((LONG *)&ctx->State) != TUN_STATE_PAUSED)
|
|
return;
|
|
|
|
ASSERT(!InterlockedGet64(&ctx->ActiveTransactionCount));
|
|
ASSERT(!InterlockedGet64(&ctx->Device.RefCount));
|
|
|
|
/* Reset adapter context in device object, as Windows keeps calling dispatch handlers even after NdisDeregisterDeviceEx(). */
|
|
TUN_CTX * volatile * control_device_extension = TunGetContextPointer(ctx->Device.Object);
|
|
if (control_device_extension)
|
|
InterlockedExchangePointer(control_device_extension, NULL);
|
|
|
|
/* Release resources. */
|
|
NdisDeregisterDeviceEx(ctx->Device.Handle);
|
|
NdisFreeNetBufferListPool(ctx->NBLPool);
|
|
NdisFreeMemory(ctx, 0, 0);
|
|
}
|
|
|
|
_IRQL_requires_max_(PASSIVE_LEVEL)
|
|
_IRQL_requires_same_
|
|
static NDIS_STATUS TunOidSet(_Inout_ TUN_CTX *ctx, _In_ NDIS_OID Oid, _In_bytecount_(InformationBufferLength) const void *InformationBuffer, _In_ UINT InformationBufferLength, _Out_ UINT *BytesRead, _Out_ UINT *BytesNeeded)
|
|
{
|
|
*BytesRead = 0;
|
|
*BytesNeeded = 0;
|
|
|
|
switch (Oid) {
|
|
case OID_GEN_CURRENT_PACKET_FILTER:
|
|
case OID_GEN_CURRENT_LOOKAHEAD:
|
|
if (InformationBufferLength != 4) {
|
|
*BytesNeeded = 4;
|
|
return NDIS_STATUS_INVALID_LENGTH;
|
|
}
|
|
*BytesRead = 4;
|
|
return NDIS_STATUS_SUCCESS;
|
|
|
|
case OID_GEN_LINK_PARAMETERS:
|
|
*BytesRead = InformationBufferLength;
|
|
return NDIS_STATUS_SUCCESS;
|
|
|
|
case OID_GEN_INTERRUPT_MODERATION:
|
|
return NDIS_STATUS_INVALID_DATA;
|
|
|
|
case OID_PNP_SET_POWER:
|
|
if (InformationBufferLength != sizeof(NDIS_DEVICE_POWER_STATE)) {
|
|
*BytesNeeded = sizeof(NDIS_DEVICE_POWER_STATE);
|
|
return NDIS_STATUS_INVALID_LENGTH;
|
|
}
|
|
*BytesRead = sizeof(NDIS_DEVICE_POWER_STATE);
|
|
ctx->PowerState = *((NDIS_DEVICE_POWER_STATE *)InformationBuffer);
|
|
return NDIS_STATUS_SUCCESS;
|
|
}
|
|
|
|
return NDIS_STATUS_INVALID_OID;
|
|
}
|
|
|
|
_IRQL_requires_max_(APC_LEVEL)
|
|
_IRQL_requires_same_
|
|
static NDIS_STATUS TunOidQuery(_Inout_ TUN_CTX *ctx, _In_ NDIS_OID Oid, _Out_bytecap_post_bytecount_(InformationBufferLength, *BytesWritten) void *InformationBuffer, _In_ UINT InformationBufferLength, _Out_ UINT *BytesWritten, _Out_ UINT *BytesNeeded)
|
|
{
|
|
UINT value32;
|
|
UINT size = sizeof(value32);
|
|
const void *buf = &value32;
|
|
|
|
switch (Oid) {
|
|
case OID_GEN_MAXIMUM_TOTAL_SIZE:
|
|
case OID_GEN_TRANSMIT_BLOCK_SIZE:
|
|
case OID_GEN_RECEIVE_BLOCK_SIZE:
|
|
value32 = TUN_EXCH_MAX_IP_PACKET_SIZE;
|
|
break;
|
|
|
|
case OID_GEN_TRANSMIT_BUFFER_SPACE:
|
|
case OID_GEN_RECEIVE_BUFFER_SPACE:
|
|
value32 = TUN_EXCH_MAX_IP_PACKET_SIZE * TUN_EXCH_MAX_PACKETS;
|
|
break;
|
|
|
|
case OID_GEN_VENDOR_ID:
|
|
value32 = TunHtonl(TUN_VENDOR_ID);
|
|
break;
|
|
|
|
case OID_GEN_VENDOR_DESCRIPTION:
|
|
size = (UINT)sizeof(TUN_VENDOR_NAME);
|
|
buf = TUN_VENDOR_NAME;
|
|
break;
|
|
|
|
case OID_GEN_VENDOR_DRIVER_VERSION:
|
|
value32 = (WINTUN_VERSION_MAJ << 16) | WINTUN_VERSION_MIN;
|
|
break;
|
|
|
|
case OID_GEN_XMIT_OK:
|
|
value32 = (UINT)(
|
|
InterlockedGet64((LONG64 *)&ctx->Statistics.ifHCOutUcastPkts ) +
|
|
InterlockedGet64((LONG64 *)&ctx->Statistics.ifHCOutMulticastPkts) +
|
|
InterlockedGet64((LONG64 *)&ctx->Statistics.ifHCOutBroadcastPkts));
|
|
break;
|
|
|
|
case OID_GEN_RCV_OK:
|
|
value32 = (UINT)(
|
|
InterlockedGet64((LONG64 *)&ctx->Statistics.ifHCInUcastPkts ) +
|
|
InterlockedGet64((LONG64 *)&ctx->Statistics.ifHCInMulticastPkts) +
|
|
InterlockedGet64((LONG64 *)&ctx->Statistics.ifHCInBroadcastPkts));
|
|
break;
|
|
|
|
case OID_GEN_STATISTICS:
|
|
size = (UINT)sizeof(ctx->Statistics);
|
|
buf = &ctx->Statistics;
|
|
break;
|
|
|
|
case OID_GEN_INTERRUPT_MODERATION: {
|
|
static const NDIS_INTERRUPT_MODERATION_PARAMETERS intp = {
|
|
.Header = {
|
|
.Type = NDIS_OBJECT_TYPE_DEFAULT,
|
|
.Revision = NDIS_INTERRUPT_MODERATION_PARAMETERS_REVISION_1,
|
|
.Size = NDIS_SIZEOF_INTERRUPT_MODERATION_PARAMETERS_REVISION_1
|
|
},
|
|
.InterruptModeration = NdisInterruptModerationNotSupported
|
|
};
|
|
size = (UINT)sizeof(intp);
|
|
buf = &intp;
|
|
break;
|
|
}
|
|
|
|
case OID_PNP_QUERY_POWER:
|
|
size = 0;
|
|
break;
|
|
|
|
default:
|
|
*BytesWritten = 0;
|
|
return NDIS_STATUS_INVALID_OID;
|
|
}
|
|
|
|
if (size > InformationBufferLength) {
|
|
*BytesNeeded = size;
|
|
*BytesWritten = 0;
|
|
return NDIS_STATUS_INVALID_LENGTH;
|
|
}
|
|
|
|
NdisMoveMemory(InformationBuffer, buf, size);
|
|
*BytesNeeded = *BytesWritten = size;
|
|
|
|
return NDIS_STATUS_SUCCESS;
|
|
}
|
|
|
|
static MINIPORT_OID_REQUEST TunOidRequest;
|
|
_Use_decl_annotations_
|
|
static NDIS_STATUS TunOidRequest(NDIS_HANDLE MiniportAdapterContext, PNDIS_OID_REQUEST OidRequest)
|
|
{
|
|
switch (OidRequest->RequestType) {
|
|
case NdisRequestQueryInformation:
|
|
case NdisRequestQueryStatistics:
|
|
return TunOidQuery(MiniportAdapterContext, OidRequest->DATA.QUERY_INFORMATION.Oid, OidRequest->DATA.QUERY_INFORMATION.InformationBuffer, OidRequest->DATA.QUERY_INFORMATION.InformationBufferLength, &OidRequest->DATA.QUERY_INFORMATION.BytesWritten, &OidRequest->DATA.QUERY_INFORMATION.BytesNeeded);
|
|
|
|
case NdisRequestSetInformation:
|
|
return TunOidSet(MiniportAdapterContext, OidRequest->DATA.SET_INFORMATION.Oid, OidRequest->DATA.SET_INFORMATION.InformationBuffer, OidRequest->DATA.SET_INFORMATION.InformationBufferLength, &OidRequest->DATA.SET_INFORMATION.BytesRead, &OidRequest->DATA.SET_INFORMATION.BytesNeeded);
|
|
|
|
default:
|
|
return NDIS_STATUS_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
|
|
static MINIPORT_DIRECT_OID_REQUEST TunDirectOidRequest;
|
|
_Use_decl_annotations_
|
|
static NDIS_STATUS TunDirectOidRequest(NDIS_HANDLE MiniportAdapterContext, PNDIS_OID_REQUEST OidRequest)
|
|
{
|
|
switch (OidRequest->RequestType) {
|
|
case NdisRequestQueryInformation:
|
|
case NdisRequestQueryStatistics:
|
|
case NdisRequestSetInformation:
|
|
return NDIS_STATUS_INVALID_OID;
|
|
|
|
default:
|
|
return NDIS_STATUS_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
|
|
static MINIPORT_SEND_NET_BUFFER_LISTS TunSendNetBufferLists;
|
|
_Use_decl_annotations_
|
|
static void TunSendNetBufferLists(NDIS_HANDLE MiniportAdapterContext, NET_BUFFER_LIST *NetBufferLists, NDIS_PORT_NUMBER PortNumber, ULONG SendFlags)
|
|
{
|
|
TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext;
|
|
|
|
NDIS_STATUS status;
|
|
if (!NT_SUCCESS(status = TunCheckForPause(ctx, 1))) {
|
|
TunSetNBLStatus(NetBufferLists, status);
|
|
NdisMSendNetBufferListsComplete(ctx->MiniportAdapterHandle, NetBufferLists, SendFlags & NDIS_SEND_FLAGS_DISPATCH_LEVEL ? NDIS_SEND_COMPLETE_FLAGS_DISPATCH_LEVEL : 0);
|
|
goto cleanup_TunCompletePause;
|
|
}
|
|
|
|
TunQueueAppend(ctx, NetBufferLists, TUN_QUEUE_MAX_NBLS);
|
|
TunQueueProcess(ctx);
|
|
|
|
cleanup_TunCompletePause:
|
|
TunCompletePause(ctx, 1);
|
|
}
|
|
|
|
DRIVER_INITIALIZE DriverEntry;
|
|
_Use_decl_annotations_
|
|
NTSTATUS DriverEntry(DRIVER_OBJECT *DriverObject, UNICODE_STRING *RegistryPath)
|
|
{
|
|
NDIS_MINIPORT_DRIVER_CHARACTERISTICS miniport = {
|
|
.Header = {
|
|
.Type = NDIS_OBJECT_TYPE_MINIPORT_DRIVER_CHARACTERISTICS,
|
|
.Revision = NDIS_MINIPORT_DRIVER_CHARACTERISTICS_REVISION_2,
|
|
.Size = NDIS_SIZEOF_MINIPORT_DRIVER_CHARACTERISTICS_REVISION_2
|
|
},
|
|
|
|
.MajorNdisVersion = NDIS_MINIPORT_MAJOR_VERSION,
|
|
.MinorNdisVersion = NDIS_MINIPORT_MINOR_VERSION,
|
|
|
|
.MajorDriverVersion = WINTUN_VERSION_MAJ,
|
|
.MinorDriverVersion = WINTUN_VERSION_MIN,
|
|
|
|
.SetOptionsHandler = TunSetOptions,
|
|
.InitializeHandlerEx = TunInitializeEx,
|
|
.HaltHandlerEx = TunHaltEx,
|
|
.UnloadHandler = TunDriverUnload,
|
|
.PauseHandler = TunPause,
|
|
.RestartHandler = TunRestart,
|
|
.OidRequestHandler = TunOidRequest,
|
|
.SendNetBufferListsHandler = TunSendNetBufferLists,
|
|
.ReturnNetBufferListsHandler = TunReturnNetBufferLists,
|
|
.CancelSendHandler = TunCancelSend,
|
|
.DevicePnPEventNotifyHandler = TunDevicePnPEventNotify,
|
|
.ShutdownHandlerEx = TunShutdownEx,
|
|
.CancelOidRequestHandler = TunCancelOidRequest,
|
|
.DirectOidRequestHandler = TunDirectOidRequest,
|
|
.CancelDirectOidRequestHandler = TunCancelDirectOidRequest
|
|
};
|
|
return NdisMRegisterMiniportDriver(DriverObject, RegistryPath, NULL, &miniport, &NdisMiniportDriverHandle);
|
|
}
|