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NdisReinitializePacket (Windows CE 5.0)

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This function removes any chained buffers from a given packet and reinitializes it for reuse.

VOID NdisReinitializePacket(PNDIS_PACKET Packet);

Parameters

  • Packet
    [in, out] Pointer to the packet descriptor allocated by the caller.

Return Values

None.

Remarks

This function reinitializes a packet descriptor so that the MiniportReserved and ProtocolReserved arrays contain all 0s and the head of the buffer chain is set to NULL.

A driver can call this function only with packet descriptors allocated by that driver. For example, a MiniportReturnPacket function is likely to call this function to prepare a driver-allocated packet for uses in a subsequent receive indication.

Before calling this function, a driver must call the NdisFreeBuffer or the NdisUnchainBufferAtXXX functions as many times as necessary to release or to save all buffer descriptors chained to the packet. Otherwise, a call to this function causes a memory leak: all memory associated with the buffer descriptor chain cannot be used by NDIS or by the driver until the system is rebooted.

A driver can call the NdisQueryPacket function to determine how many buffer descriptors are chained to a given packet and, therefore, how many calls to NdisFreeBuffer or NdisUnchainBufferAtXXX are required. It can call the NdisGetNextBuffer function to retrieve each buffer descriptor pointer to pass to NdisFreeBuffer.

A call to this function has no effect on the NDIS_PACKET_OOB_DATA structure associated with the packet descriptor. To prepare this block for reuse, the allocating driver can reset the relevant members with the appropriate NDIS_SET_PACKET_XXX macros.

Requirements

OS Versions: Windows CE .NET 4.0 and later.
Header: Ndis.h.

See Also

MiniportReturnPacket | NDIS_PACKET_OOB_DATA | NDIS_SET_PACKET_HEADER_SIZE | NDIS_SET_PACKET_MEDIA_SPECIFIC_INFO | NDIS_SET_PACKET_STATUS | NDIS_SET_PACKET_TIME_RECEIVED | NDIS_SET_PACKET_TIME_TO_SEND | NdisAllocatePacket | NdisFreeBuffer | NdisGetNextBuffer | NdisQueryPacket | NdisUnchainBufferAtBack | NdisUnchainBufferAtFront | NdisZeroMemory

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