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NdisIMCopySendCompletePerPacketInfo

  • Article

This function copies per-packet information from a packet returned up by a lower miniport driver into a new packet that is to be returned to an upper-level driver.

VOID NdisIMCopySendCompletePerPacketInfo(
  PNDIS_PACKET DstPacket,
  PNDIS_PACKET SrcPacket
);

Parameters

  • DstPacket
    [in] Pointer to the destination packet descriptor in which per-packet information is to be copied.
  • SrcPacket
    [in] Pointer to the source packet descriptor from which per-packet information is copied.

Return Values

None.

Remarks

When an intermediate driver handles the completion of a send request from a lower miniport driver, that intermediate driver calls NdisIMCopySendCompletePerPacketInfo to copy per-packet information. The intermediate driver copies the per-packet information from a packet that was returned by the lower miniport driver into a new packet that the intermediate driver returns to an upper-level driver. The intermediate driver calls NdisIMCopySendCompletePerPacketInfo for each packet returned through the stack unless the intermediate driver must modify a packet's per-packet information.

Per-packet information is contained in an NDIS_PACKET_EXTENSION structure and includes, for example, checksum information, IP Security information, and 802.1p priority information.

If an intermediate driver must modify a packet's per-packet information, that intermediate driver can use either of the following macros to access the per-packet information:

  • NDIS_PER_PACKET_INFO_FROM_PACKET accesses a specific type of per-packet information in a packet. Use this macro to access only a single type of per-packet information for a packet.
  • NDIS_PACKET_EXTENSION_FROM_PACKET accesses all of the per-packet information in a packet. Use this macro to access more than one type of per-packet information for a packet.

To copy a range of data from one packet to another, use the NdisCopyFromPacketToPacket function.

Requirements

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

See Also

NdisCopyFromPacketToPacket | NdisIMCopySendPerPacketInfo | NDIS_PACKET_EXTENSION | NDIS_PER_PACKET_INFO_FROM_PACKET | NDIS_PACKET_EXTENSION_FROM_PACKET

 Last updated on Tuesday, May 18, 2004

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