2.1  NDIS Library Functions Used by Miniport Drivers

ETH_COPY_NETWORK_ADDRESS

Copies a given Ethernet address to a given location.

FDDI_COMPARE_NETWORK_ADDRESSES

Sets a caller-supplied variable to a value indicating whether a given FDDI address is greater than, less than, or equal to another given FDDI address.

FDDI_IS_BROADCAST

Sets a caller-supplied variable to a Boolean value indicating whether a given FDDI address is a broadcast address.

FDDI_IS_MULTICAST

Sets a caller-supplied variable to a Boolean value indicating whether a given FDDI address is a multicast address.

FDDI_IS_SMT

Sets a caller-supplied variable to a Boolean value indicating whether a given FDDI frame is SMT (systems management utility).

NdisAcquireSpinLock

Acquires a spin lock so the caller can synchronize access to resources shared among nonISR driver routines in a multiprocessor-safe way.

NdisAdjustBufferLength

Modifies the length specified in a given buffer descriptor that was allocated or copied by the caller.

NdisAllocateBuffer

Creates a buffer descriptor describing a specified virtual (sub)range within an already allocated, nonpaged memory block, given a handle returned by NdisAllocateBufferPool.

NdisAllocateBufferPool

Returns a handle with which the caller can allocate buffer descriptors with NdisAllocateBuffer.

NdisAllocateMemory

Allocates resident (nonpaged) system-space memory, optionally within a specified address limit, as a physically contiguous allocation, and/or as a noncached allocation.

NdisAllocatePacket

Allocates a packet descriptor, given a handle returned by a preceding call to NdisAllocatePacketPool.

NdisAllocatePacketPool

Allocates and initializes a block of nonpaged packet pool, given the number of packet descriptors and how many bytes each fixed-size packet descriptor should contain.

NdisAllocateSpinLock

Initializes a variable of type NDIS_SPIN_LOCK, used to synchronize access to resources shared among nonISR driver functions. An initialized spin lock, for which the caller supplies resident storage, is a required parameter to the Ndis..SpinLock and NdisInterlockedXxx functions.

NdisAnsiStringToUnicodeString

Converts a given counted ANSI string into a counted Unicode string.

NDIS_BUFFER_LINKAGE

Returns a pointer to a linked buffer, given a pointer to an NDIS buffer descriptor.

NDIS_BUFFER_TO_SPAN_PAGES

Determines how many pages of host memory are being used to back a given buffer.

NdisChainBufferAtBack

Links a given buffer descriptor at the end of the chain of buffer descriptors for a given packet descriptor.

NdisChainBufferAtFront

Links a given buffer descriptor at the start of the chain of buffer descriptors for a given packet descriptor.

NdisCloseConfiguration

Releases the handle returned by NdisOpenConfiguration after the caller has retrieved configuration information for a NIC or itself and/or, possibly, stored additional information about its NIC in the registry.

NdisCloseFile

Releases a handle returned by NdisOpenFile and frees the memory allocated to hold the file contents when it was opened.

NdisCopyBuffer

Creates a buffer descriptor for a specified virtual (sub)range, given a handle for a block of already allocated memory and a pointer to the buffer descriptor for the block.

NdisCopyFromPacketToPacket

Copies a specified number of bytes of data from one packet to another, starting at a specified offset in a given source packet’s data and copying the data to a specified offset in the target packet. Returns the number of bytes actually copied, which can be less than the requested number, depending on the source packet and specified starting offset for the copy operation.

NdisCreateLookaheadBufferFromSharedMemory

Returns the virtual address of a buffer within a block of memory shared with a busmaster DMA NIC so the caller can set up a read-only lookahead buffer for a receive indication to higher-level drivers.

NdisDestroyLookaheadBufferFromSharedMemory

Releases access to the buffer obtained in the preceding call to NdisCreateLookaheadBufferFromSharedMemory.

NdisDprAcquireSpinLock

Acquires a spin lock so the caller can synchronize access to resources shared among nonISR driver functions in a multiprocessor-safe way, provided that the caller is running at IRQL DISPATCH_LEVEL.

NdisDprAllocatePacket

Allocates and initializes a packet descriptor when the caller is running at IRQL DISPATCH_LEVEL, given a handle returned by a preceding call to NdisAllocatePacketPool.

NdisDprFreePacket

Releases a driver-allocated packet descriptor and returns it to the free list when the caller is running at IRQL DISPATCH_LEVEL.

NdisDprReleaseSpinLock

Releases a spin lock that was acquired in a preceding call to NdisDprAcquireSpinLock.

NdisEqualString

Compares two strings to determine whether they are equal.

NdisFlushBuffer

Flushes the memory region described by a given buffer descriptor from all processor caches.

NdisFreeBuffer

Releases a buffer descriptor obtained in a preceding call to NdisAllocateBuffer or NdisCopyBuffer.

NdisFreeBufferPool

Releases a handle obtained in a preceding call to NdisAllocateBufferPool.

NdisFreeMemory

Releases a handle, usually when the driver is being unloaded, that was obtained in a preceding call to NdisAllocateMemory.

NdisFreePacket

Releases a packet descriptor that was allocated from packet pool with NdisAllocatePacket and returns it to the free list.

NdisFreePacketPool

Releases a handle to a block of packet pool that was allocated with NdisAllocatePacketPool.

NdisFreeSpinLock

Releases a spin lock initialized in a preceding call to NdisAllocateSpinLock, usually when a driver is unloading.

NdisFreeString

Frees the storage for a buffered string.

NdisGetBufferPhysicalArraySize

Returns the number of discontiguous physical blocks in a buffer, given a buffer descriptor.

NdisGetCacheFillSize

Returns the size of the microprocessor cache boundary in bytes. (This information is useful primarily to drivers of busmaster DMA NICs.)

NdisGetCurrentProcessorCpuUsage

Returns how busy the current processor is as a percentage.

NdisGetCurrentSystemTime

Returns the current system time, suitable for use as a timestamp.

NdisGetFirstBufferFromPacket

Returns pointers to the buffer descriptor and base virtual address for the initial buffer chained to a given packet, along with the sizes of the initial buffer and full buffer, in case the buffer is fragmented.

NdisGetNextBuffer

Returns the next buffer descriptor in a chain, given the current buffer descriptor.

NdisGetPacketFlags

Returns the flags, if any, set by a protocol driver in a given packet descriptor.

NDIS_GET_PACKET_MEDIA_SPECIFIC_INFO

Returns the address (MediaSpecificInformation) and length (SizeMediaSpecificInfo) from the NDIS_PACKET_OOB_DATA block associated with the packet descriptor of a buffer containing out-of-band information, such as packet priority, about a given send packet set up by a protocol.

NDIS_GET_PACKET_STATUS

Returns the Status of an indicated receive packet on return from NdisMIndicateReceivePacket so the driver can determine whether its miniport-allocated packet descriptor (and chained buffer descriptors) can be prepared for reuse immediately.

NDIS_GET_PACKET_TIME_TO_SEND

Returns the protocol-set TimeToSend timestamp, directing the miniport when to send the given packet, from the NDIS_PACKET_OOB_DATA block associated with the incoming packet descriptor.

NdisGetPhysicalAddressHigh

Returns the high-order part of a given physical address.

NdisGetPhysicalAddressLow

Returns the low-order part of a given physical address.

NdisIMDeInitializeDeviceInstance

Calls an NDIS intermediate driver's MiniportHalt function to tear down the driver's virtual NIC.

NdisIMInitializeDeviceInstance

Calls an NDIS intermediate driver’s MiniportInitialize function to set up the driver’s virtual NIC for I/O operations bound for an underlying NIC driver to which the intermediate driver is bound. 

NdisImmediateReadPciSlotInformation

Returns a specified range of PCI configuration information to a caller-supplied buffer, given a handle to the wrapper configuration context and the slot number for the NIC on the I/O bus.

NdisImmediateReadPortUchar

Reads a byte from a specified port on an I/O bus during driver initialization, given the handle to the wrapper configuration context. If necessary, this function maps the specified bus-relative port address in order to read the data.

NdisImmediateReadPortUlong

Reads a ULONG from a specified port on an I/O bus during driver initialization, given a handle to the wrapper configuration context. If necessary, this function maps the specified bus-relative port address in order to read the data.

NdisImmediateReadPortUshort

Reads a USHORT from a specified port on an I/O bus during driver initialization, given a handle to the wrapper configuration context. If necessary, this function maps the specified bus-relative port address in order to read the data.

NdisImmediateReadSharedMemory

Reads a specified number of bytes into a caller-supplied buffer from shared device RAM, given the base physical address for the shared memory and a handle to the wrapper configuration context. If necessary, this function maps the specified bus-relative memory range in order to read the data.

NdisImmediateWritePciSlotInformation

Writes data from a caller-supplied buffer to a specified range of the PCI configuration space, given a handle to the wrapper configuration context and the slot number for the NIC on the I/O bus.

NdisImmediateWritePortUchar

Writes a byte to a specified port on an I/O bus during driver initialization, given the handle to the wrapper configuration context. If necessary, this function maps the specified bus-relative port address in order to write the data.

NdisImmediateWritePortUlong

Writes a ULONG to a specified port on an I/O bus during driver initialization, given the handle to the wrapper configuration context. If necessary, this function maps the specified bus-relative port address in order to write the data.

NdisImmediateWritePortUshort

Writes a USHORT to a specified port on an I/O bus during driver initialization, given the handle to the wrapper configuration context. If necessary, this function maps the specified bus-relative port address in order to write the data.

NdisImmediateWriteSharedMemory

Writes a specified number of bytes from a caller-supplied buffer to shared device RAM, given the base physical address for the shared memory and a handle to the wrapper configuration context. If necessary, this function maps the specified bus-relative memory range in order to write the data.

NdisIMQueueMiniportCallback

Calls an intermediate driver’s callback function to when it can execute in a MiniportXxx context, as, for example, to forward an indication to higher-level protocols. 

NdisIMRegisterLayeredMiniport

Registers an NDIS intermediate driver’s MiniportXxx entry points and name with the NDIS library when the driver initializes.

NdisIMRevertBack

Returns the function of an intermediate driver to the context in which it was executing before it called NdisIMSwitchToMiniport.

NdisIMSwitchToMiniport

Allows an intermediate driver function to call NdisMXxx normally called only from MiniportXxx functions, as, for example, to make indications up to higher-level protocols. 

NdisInitAnsiString

Initializes a counted ANSI string.

NDIS_INIT_FUNCTION

Marks a given driver function as initialization-only code to be discarded after the function has run once.

NdisInitializeEvent

Sets up an event object during driver initialization to be used subsequently as a synchronization mechanism.

NdisInitializeListHead

Sets up a queue header for a driver’s internal queue, given a pointer to driver-supplied resident storage for the queue header and queue. Then, entries (usually packets) can be added to and removed from the doubly-linked queue with the NdisInterlocked..List functions.

NdisInitializeString

Allocates a buffer for and initializes a counted string in the system-default character set, given a source string and a NULL pointer.

NdisInitUnicodeString

Initializes a counted Unicode string.

NdisInterlockedAddUlong

Adds an unsigned long value to a given unsigned integer as an atomic operation, using a caller-supplied and initialized spin lock.

NdisInterlockedInsertHeadList

Inserts an entry, usually a packet, at the head of a doubly linked list using a caller-supplied and initialized spin lock so that access to queued entries is synchronized in a multiprocessor-safe way among nonISR driver functions.

NdisInterlockedInsertTailList

Inserts an entry, usually a packet, at the end of a doubly linked list using a caller-supplied and initialized spin lock so that access to queued entries is synchronized in a multiprocessor-safe way among nonISR driver functions.

NdisInterlockedRemoveHeadList

Removes an entry, usually a packet, from the head of a doubly linked list using a caller-supplied and initialized spin lock so that access to queued entries is synchronized in a multiprocessor-safe way among nonISR driver functions.

NdisMAllocateMapRegisters

Reserves system resources during NIC driver initialization for subsequent busmaster DMA operations.

NdisMAllocateSharedMemory

Allocates and maps a memory range so it is simultaneously accessible from both the system and a busmaster DMA device, given the MiniportAdapterHandle for the NIC input to MiniportInitialize, the number of bytes to be allocated, and whether the memory should be cached. Returns the base (system) virtual address of the allocation for use by the miniport and a mapped base logical address for use by the NIC.

NdisMAllocateSharedMemoryAsync

Allocates additional memory shared between a miniport and its busmaster DMA NIC, usually when the miniport is running low on available receive buffers.

NdisMapFile

Maps the contents of an already open file to a caller-accessible buffer if the file currently is unmapped, given a handle returned by NdisOpenFile.

NdisMArcIndicateReceive

Notifies NDIS that an ARCNET packet is being received on a particular NIC, identified by the adapter handle, and that the packet or some initial lookahead portion of the packet, along with the packet header, is available to be forwarded to the appropriate bound protocol driver(s).

NdisMArcIndicateReceiveComplete

Notifies NDIS that an ARCNET receive packet, identified in a preceding call to NdisMArcIndicateReceive, has been fully transferred through a particular NIC, identified by the given adapter handle, so that NDIS can notify the appropriate bound protocol driver(s).

NdisMCancelTimer

Cancels a preceding call to NdisMSetPeriodicTimer or cancels the immediately preceding call to NdisMSetTimer if the interval given to NdisMSetTimer has not yet expired.

NdisMCloseLog

Releases resources allocated when the driver called NdisMCreateLog.

NdisMCompleteBufferPhysicalMapping

Flushes any data remaining in a busmaster NIC’s internal cache at the end of a transfer operation that was set up with NdisMStartBufferPhysicalMapping.

NdisMCompleteDmaTransfer

Completes a system DMA transfer operation begun with a preceding call to NdisMSetupDmaTransfer, ensuring that the data is flushed to system memory or to the NIC, depending on the transfer direction.

NdisMCreateLog

Allocates and opens a log file in which a NIC miniport can write data to be displayed by a driver-dedicated Win32 application.

NdisMDeregisterAdapterShutdownHandler

Removes a driver-supplied MiniportShutdown function when the driver is unloading from the set of shutdown handlers that were registered with NdisMRegisterAdapterShutdownHandler.

NdisMDeregisterDmaChannel

Releases DMA system resources, including claimed hardware resources in the registry, that were acquired with NdisMRegisterDmaChannel. Drivers call NdisMDeregisterDmaChannel when they are unloading.

NdisMDeregisterInterrupt

Releases the mapping created with an initialization-time call to NdisMRegisterInterrupt. Drivers call NdisMDeregisterInterrupt when they are unloading.

NdisMDeregisterIoPortRange

Releases a mapping that was set up with NdisMRegisterIoPortRange during driver initialization.

NdisMEthIndicateReceive

Notifies NDIS that an Ethernet packet is being received on a particular NIC, identified by the adapter handle, and that the packet or some initial lookahead portion of the packet, along with the packet header, is available to be forwarded to the appropriate bound protocol driver(s).

NdisMEthIndicateReceiveComplete

Notifies NDIS that an Ethernet receive packet, identified in a preceding call to NdisMEthIndicateReceive, has been fully transferred through a particular NIC, identified by the given adapter handle, so that NDIS can notify the appropriate bound protocol driver(s).

NdisMFddiIndicateReceive

Notifies NDIS that an FDDI packet is being received on a particular NIC, identified by the adapter handle, and that the packet or some initial lookahead portion of the packet, along with the packet header, is available to be forwarded to the appropriate bound protocol driver(s).

NdisMFddiIndicateReceiveComplete

Notifies NDIS that an FDDI receive packet, identified in a preceding call to NdisMFddiIndicateReceive, has been fully transferred through a particular NIC, identified by the given adapter handle, so that NDIS can notify the appropriate bound protocol driver(s).

NdisMFlushLog

Clears a miniport’s log file that was allocated with NdisMCreateLog.

NdisMFreeMapRegisters

Releases system resources for busmaster DMA that were reserved with NdisMAllocateMapRegisters. Drivers call NdisMFreeMapRegisters when they are unloading or during initialization if they fail to successfully initialize a NIC.

NdisMFreeSharedMemory

Releases a block of memory that was allocated with NdisMAllocateSharedMemory. Drivers call NdisMFreeSharedMemory when they are unloading or during initialization if they fail to successfully initialize a NIC.

NdisMIndicateReceivePacket

Notifies NDIS that an array of received packets is available to be forwarded to the appropriate bound protocol driver(s).

NdisMIndicateStatus

Notifies NDIS of a change in the runtime status of a NIC that might be corrected with a reset operation or possibly even require the NIC to be taken out of service, depending on the given NDIS_STATUS_XXX and additional driver-supplied information.

NdisMIndicateStatusComplete

Notifies NDIS that the driver, which has previously called NdisMIndicateStatus one or more times to indicate hardware anomalies or runtime state changes in the NIC, is ready to resume normal device I/O operations.

NdisMInitializeTimer

Sets up a caller-supplied MiniportTimer function to be associated with a timer object during driver initialization; returns a handle at the caller-supplied resident storage for the timer object. This handle is a required parameter to all other NdisM..Timer functions.

NdisMInitializeWrapper

Notifies NDIS that a new NIC driver is initializing and returns a WrapperConfigurationContext handle to be passed in subsequent calls to NdisXxx initialization and configuration functions.

NdisMMapIoSpace

Maps a given bus-relative “physical” range of device memory, such as on-board device RAM or a set of NIC registers, onto system-space nonpaged pool and returns the mapped virtual base address for subsequent use in PIO operations.

NdisMoveFromMappedMemory

Copies data from device memory that was mapped with NdisMMapIoSpace to a system-space buffer.

NdisMoveMappedMemory

Copies data from one location to another in a memory block that was mapped with NdisMMapIoSpace.

NdisMoveMemory

Copies a specified number of bytes from one caller-supplied location to another.

NdisMoveToMappedMemory

Copies data from a system-space buffer to device memory that was mapped with NdisMMapIoSpace.

NdisMPciAssignResources

Claims resources in the registry for the caller and returns the hardware configuration information for a PCI NIC, given a handle passed in to the MiniportInitialize function and the slot number of its NIC on the PCI bus.

NdisMQueryAdapterResources

Either returns a list of PCMCIA resources used by a NIC or returns NDIS_STATUS_NOT_SUPPORTED.

NdisMQueryInformationComplete

Returns the final status of a query-information request for which the driver previously returned NDIS_STATUS_PENDING.

NdisMReadDmaCounter

Returns the number of bytes remaining to be transferred during a DMA operation if the NIC uses the host DMA controller’s autoinitialize mode, given a handle returned by NdisMRegisterDmaChannel.

NdisMRegisterAdapterShutdownHandler

Registers a driver-supplied MiniportShutdown function to be called with a pointer to a caller-supplied context buffer when the system is about to be shut down, given a handle passed in to the MiniportInitialize function. Such a MiniportShutdown function restores the NIC to its initial state.

NdisMRegisterDmaChannel

Reserves system resources during driver initialization for subsequent slave DMA operations or ISA busmaster DMA operations and claims a DMA channel in the registry, returning a handle to be passed in subsequent calls to the NdisMXxx DMA functions.

NdisMRegisterInterrupt

Sets up a mapping between the miniport’s ISRHandler and HandleInterruptHandler (DPC) functions, already registered with NdisMRegisterMiniport, and the bus-relative vector (or level) on which its NIC interrupts, given a pointer to caller-allocated storage for opaque interrupt state and the adapter handle for the NIC. The interrupt handle initialized in this call is a required parameter to NdisMSynchronizeWithInterrupt.

NdisMRegisterIoPortRange

Claims a range of device memory in the registry and maps a given bus-relative range of I/O ports to a range of system logical addresses during initialization, which the driver can pass in subsequent calls to the NdisRawXxx to communicate with its NIC.

NdisMRegisterMiniport

Registers a miniport’s entry points and name with the NDIS library, given a handle obtained from NdisMInitializeWrapper and a pointer to the NDIS_MINIPORT_CHARACTERISTICS structure set up by the caller.

NdisMResetComplete

Returns the final status of a reset request for which the driver previously returned NDIS_STATUS_PENDING and indicates whether the reset operation on the NIC affected its network address information.

NdisMSendComplete

Returns the packet and final status of a completed send request for which the driver previously returned NDIS_STATUS_PENDING, so that NDIS can return the completed packet to the appropriate bound protocol driver(s).

NdisMSendResourcesAvailable

Notifies NDIS that the driver has internal resources available to process another send request when the driver has an outstanding send request for which it returned NDIS_STATUS_PENDING but has not yet called NdisMSendComplete.

NdisMSetAttributes

Informs the NDIS library about significant features of the caller’s NIC, such as whether it is a busmaster and the type of I/O bus on which the NIC can be found, so the miniport can call other NdisXxx initialization and configuration routines, particularly the NdisRegisterXxx. NIC drivers can call this function or NdisMSetAttributesEx. Intermediate drivers must call NdisMSetAttributesEx.

NdisMSetAttributesEx

Informs the NDIS library about significant features of the caller’s NIC, such as whether it is a busmaster and the type of I/O bus on which the NIC can be found, so the miniport can call other NdisXxx initialization and configuration routines, particularly the NdisRegisterXxx. In addition, this function prevents NDIS from timing out sends and requests in an intermediate driver or optionally resets the interval at which a NIC driver’s MiniportCheckForHang function is called. 

NdisMSetInformationComplete

Returns the final status of a set-information request for which the driver previously returned NDIS_STATUS_PENDING.

NdisMSetPeriodicTimer

Sets a timer to fire periodically, thereby running an associated MiniportTimer function repeatedly at a specified fixed interval.

NdisMSetTimer

Sets a caller-initialized timer object to a specified interval, thereby running an associated MiniportTimer function once when the given interval expires.

NdisMSetupDmaTransfer

Sets up the host DMA controller to transfer a specified range of data from a given buffer, given the handle returned by a preceding call to NdisMRegisterDmaChannel and the transfer direction.

NdisMSleep

Delays execution of the caller for a given interval in microseconds.

NdisMStartBufferPhysicalMapping

Sets up a busmaster NIC for a DMA transfer operation, given the adapter handle for the NIC, the direction of the transfer, a pointer to the buffer descriptor, an index to the initial map register, a pointer to caller-allocated memory for a variable-size array of NDIS_PHYSICAL_UNIT structures, and the number of elements in the array.

NdisMSynchronizeWithInterrupt

Synchronizes the execution of a caller-supplied MiniportSynchronizeISR function with that of the ISR associated with the given initialized interrupt handle. When it runs, the supplied function can access data shared with the ISR in a multiprocessor-safe way.

NdisMTrIndicateReceive

Notifies NDIS that a Token Ring packet is being received on a particular NIC, identified by the adapter handle, and that the packet or some initial lookahead portion of the packet, along with the packet header, is available to be forwarded to the appropriate bound protocol driver(s).

NdisMTrIndicateReceiveComplete

Notifies NDIS that a Token Ring packet, identified in a preceding call to NdisMTrIndicateReceive, has been fully transferred through a particular NIC, identified by the given adapter handle, so that NDIS can notify the appropriate bound protocol driver(s).

NdisMTransferDataComplete

Returns the packet and final status of a completed transfer-data request for which the driver previously returned NDIS_STATUS_PENDING and returns the number of bytes actually transferred.

NdisMUnmapIoSpace

Releases a mapping obtained with NdisMMapIoSpace, usually when a driver is unloading.

NdisMUpdateSharedMemory

Ensures that data read from shared memory is current when the busmaster NIC has just written data to shared memory on platforms that require explicit coherency support from the system.

NdisMWriteLogData

Transfers miniport-supplied information into its log file for consumption and display by a driver-dedicated Win32 application.

NDIS_OOB_DATA_FROM_PACKET

Returns a pointer to the NDIS_PACKET_OOB_DATA block associated with a given packet descriptor.

NdisOpenConfiguration

Returns a handle for a miniport’s HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services
\
DriverName\Parameters registry key. This handle is a required parameter to other NdisXxx configuration functions.

NdisOpenFile

Returns a handle for an opened file, given its name and the highest acceptable address at which to allocate memory for the file data. The returned handle is a required parameter to NdisMapFile, which gives the caller exclusive access to the file data until it calls NdisUnmapFile.

NDIS_PAGABLE_FUNCTION

Marks a driver function as pageable code.

NDIS_PHYSICAL_ADDRESS_CONST

Initializes a constant of type NDIS_PHYSICAL_ADDRESS.

NdisPrintString

Displays a given string in the debugging window.

NdisQueryBuffer

Retrieves the size of the range, and optionally its base virtual address, specified in a given buffer descriptor.

NdisQueryBufferOffset

Retrieves the base virtual address of the range specified in a given buffer descriptor.

NdisQueryMapRegisterCount

Returns the maximum number of available map registers in the current platform so the driver of a busmaster DMA NIC can call NdisMAllocateMapRegisters with an appropriate value during initialization.

NdisQueryPacket

Returns any or all of the following information about a given packet descriptor: a count of buffer descriptors chained to the packet descriptor, the total number of bytes in all buffers mapped by the buffer descriptor chained to the packet descriptor, the total number of physically discontiguous blocks for all such buffers, and a pointer to the initial buffer descriptors in the chain.

NdisQuerySendFlags

See NdisGetPacketFlags.

NdisRawReadPortBufferUchar

Reads a specified number of bytes into a caller-supplied buffer, given an I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawReadPortBufferUlong

Reads a specified number of ULONGs into a caller-supplied buffer, given an I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawReadPortBufferUshort

Reads a specified number of USHORTs into a caller-supplied buffer, given an I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawReadPortUchar

Reads a byte from a given I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawReadPortUlong

Reads a ULONG from a given I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawReadPortUshort

Reads a USHORT from a given I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawWritePortBufferUchar

Writes a specified number of bytes from a caller-supplied buffer to a given I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawWritePortBufferUlong

Writes a specified number of ULONGs from a caller-supplied buffer to a given I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawWritePortBufferUshort

Writes a specified number of USHORTs from a caller-supplied buffer to a given I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawWritePortUchar

Writes a given byte to a given I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawWritePortUlong

Writes a given ULONG to a given I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisRawWritePortUshort

Writes a given USHORT to a given I/O port mapped during initialization with NdisMRegisterIoPortRange.

NdisReadConfiguration

Reads the value of a named entry of the specified type, given the registry handle for the caller’s Parameters key returned by NdisOpenConfiguration.

NdisReadEisaSlotInformation

Returns EISA configuration information to a caller-supplied buffer during initialization, given a handle to the wrapper configuration context and the slot number for the NIC on the I/O bus.

NdisReadEisaSlotInformationEx

Returns EISA configuration information, including all available EISA function information, to a caller-supplied buffer during initialization, given a handle to the wrapper configuration context and the slot number for the NIC on the I/O bus.

NdisReadMcaPosInformation

Returns POS configuration information to a caller-supplied buffer during initialization, given a handle to the wrapper configuration context and the channel number for the NIC on the I/O bus.

NdisReadNetworkAddress

Returns the size and value, in binary, of the NetworkAddress entry, specifying the setup-configured network address of the NIC, from the caller’s Parameters key in the registry, given the handle obtained from NdisOpenConfiguration.

NdisReadPciSlotInformation

Returns a specified range of PCI configuration information to a caller-supplied buffer during initialization, given an adapter handle and the slot number for the NIC on the I/O bus.

NdisReadRegisterUchar

Reads a byte from a device register, given its mapped memory-space address.

NdisReadRegisterUlong

Reads a ULONG from a device register, given its mapped memory-space address.

NdisReadRegisterUshort

Reads a USHORT from a device register, given its mapped memory-space address.

NdisRecalculatePacketCounts

Resets the valid counts of chained buffer descriptors for a given packet descriptor.

NdisReinitializePacket

Sets to NULL the queue head for any chained buffers in a given packet descriptor and reinitializes it for reuse.

NdisReleaseSpinLock

Releases a spin lock that was acquired in a preceding call to NdisAcquireSpinLock.

NdisResetEvent

Clears the Signaled state of a given event.

NdisRetrieveUlong

Retrieves a ULONG value from the source address, avoiding alignment faults.

NdisSetEvent

Sets a given event to the Signaled state if it was not already Signaled, thereby causing waits on the event to be satisfied.

NDIS_SET_PACKET_HEADER_SIZE

Sets the HeaderSize in the NDIS_PACKET_OOB_DATA block associated with a miniport-allocated packet descriptor for received net packet(s) to be indicated.

NDIS_SET_PACKET_MEDIA_SPECIFIC_INFO

Sets the MediaSpecificInformation and SizeMediaSpecificInfo in the NDIS_PACKET_OOB_DATA block associated with a miniport-allocated packet descriptor for a received net packet about to be indicated.

NDIS_SET_PACKET_STATUS

Sets the Status in the NDIS_PACKET_OOB_DATA block associated with packet descriptor for a received net packet about to be indicated or for a given send packet completed in the MiniportSend(Packets) function.

NDIS_SET_PACKET_TIME_RECEIVED

Sets the TimeReceived in the NDIS_PACKET_OOB_DATA block associated with a miniport-allocated packet descriptor for a received net packet about to be indicated with NdisMIndicateReceivePacket.

NDIS_SET_PACKET_TIME_SENT

Sets the TimeSent in the NDIS_PACKET_OOB_DATA associated with a miniport-allocated packet descriptor for a received net packet about to be indicated with NdisMIndicateReceivePacket.

NdisSetPhysicalAddressHigh

Sets the high-order part of a given physical address to a given value.

NdisSetPhysicalAddressLow

Sets the low-order part of a given physical address to a given value.

NdisStallExecution

Stalls the caller on the current processor for a given interval in microseconds.

NdisStoreUlong

Stores a ULONG value at a particular address, avoiding alignment faults.

NdisSystemProcessorCount

Determines whether its caller is running on a uniprocessor or multiprocessor machine, which is useful information for allocating resources during driver initialization.

NdisTerminateWrapper

Releases system resources allocated when the driver called NdisInitializeWrapper. Drivers call NdisTerminateWrapper during initialization if they cannot find and successfully initialize at least one NIC or when they are unloading.

NdisUnchainBufferAtBack

Removes a given buffer descriptor at the end of the chain of buffer descriptors for a given packet descriptor and returns a pointer to the buffer descriptor.

NdisUnchainBufferAtFront

Removes a given buffer descriptor at the start of the chain of buffer descriptors for a given packet descriptor and returns a pointer to the buffer descriptor.

NdisUnicodeStringToAnsiString

Converts a given counted Unicode string into a counted ANSI string.

NdisUnmapFile

Releases the file mapping set up by the preceding call to NdisMapFile.

NdisWaitEvent

Puts the caller into a wait state until the given event is set to the Signaled state or the wait times out.

NdisWriteConfiguration

Writes a caller-supplied value entry in the registry, given the handle for the caller’s Parameters key returned by NdisOpenConfiguration

NdisWriteErrorLogEntry

Allocates an error-log record, fills it in, and writes it to the I/O error log, given the adapter handle for the NIC, an NDIS_XXX error code, a count of caller-supplied error values, and a corresponding number of ULONGs specifying additional information about the I/O error or configuration error.

NdisWritePciSlotInformation

Writes data from a caller-supplied buffer to a specified range of the PCI configuration space, given a handle to the adapter and the slot number for the NIC on the I/O bus.

NdisWriteRegisterUchar

Writes a given byte to a device register, given its mapped memory-space address.

NdisWriteRegisterUlong

Writes a given ULONG to a device register, given its mapped memory-space address.

NdisWriteRegisterUshort

Writes a given USHORT to a device register, given its mapped memory-space address.

NdisZeroMappedMemory

Fills a block of memory that was mapped in a preceding call to NdisMapIoSpace with zeros, given a pointer to the block and the length in bytes to be filled.

NdisZeroMemory

Fills a block of memory with zeros, given a pointer to the block and the length in bytes to be filled.

TR_COMPARE_NETWORK_ADDRESSES

Sets a caller-supplied variable to a value indicating whether a given Token Ring address is greater than, less than, or equal to another given Token Ring address.

TR_COPY_NETWORK_ADDRESS

Copies a given Token Ring address to a given location.

TR_IS_BROADCAST

Sets a caller-supplied variable to a Boolean value indicating whether a given Token Ring address is a broadcast address.

TR_IS_FUNCTIONAL

Sets a caller-supplied variable to a Boolean value indicating whether a given Token Ring address is a functional address.

TR_IS_GROUP

Sets a caller-supplied variable to a Boolean value indicating whether a given Token Ring address is a group address.

TR_IS_NOT_DIRECTED

Sets a caller-supplied variable to a Boolean value indicating whether a given Token Ring address is neither a functional nor a group address.

TR_IS_SOURCE_ROUTING

Sets a caller-supplied variable to a Boolean value indicating whether a given Token Ring address is a source-routing address.

To ensure their portability across Microsoft operating systems that support Win32, most NDIS miniport drivers call only functions exported by the NDIS library and use only macros explicitly declared in the master header file, ndis.h, or in the appropriate efilter.h, ffilter.h, tfilter.h, or afilter.h, if the NDIS uses the system-supplied Ethernet, FDDI, Token Ring, or ARCNET filter-library support to manage bindings for the miniport.

However, in addition to the NDIS library functions listed here, a miniport driver might use some of the macros and support routines exported by other Windows NT kernel-mode components, such as the following:
CONTAINING_RECORD
InitializeListHead
InsertHeadList
InsertTailList
IsListEmpty
RemoveEntryList
RemoveHeadList

For more information about the preceding Windows NT macro and functions, see the Kernel-Mode Driver Reference.