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NdisDprFreePacket function

Note   NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.

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

Syntax


VOID NdisDprFreePacket(
  _In_  PNDIS_PACKET Packet
);

Parameters

Packet [in]

Pointer to the packet descriptor returned by NdisDprAllocatePacket or NdisAllocatePacket.

Return value

None

Remarks

Before calling NdisDprFreePacket, the driver either must call NdisFreeBuffer as many times as necessary to release all buffer descriptors chained to the packet, or it must call an NdisUnchainBufferAtXxx function as many times as necessary to save all pointers to buffer descriptors. Otherwise, memory associated with buffer descriptors in the chain remains unusable by the driver and by NDIS until the system is rebooted.

Callers of NdisDprFreePacket must be running at IRQL = DISPATCH_LEVEL. Otherwise, drivers should call NdisFreePacket.

Requirements

Version

Not supported for NDIS 6.0 drivers in Windows Vista. Supported for NDIS 5.1 drivers in Windows Vista and Windows XP.

Header

Ndis.h (include Ndis.h)

IRQL

DISPATCH_LEVEL (See Remarks section)

See also

NdisAllocatePacket
NdisAllocatePacketPool
NdisDprAllocatePacket
NdisFreeBuffer
NdisFreePacket
NdisUnchainBufferAtBack
NdisUnchainBufferAtFront

 

 

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