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Packet Out-of-Band Data (NDIS 5.1)

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 x has been deprecated and is superseded by NDIS 6.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.

Every NDIS_PACKET-type descriptor has an associated out-of-band (OOB) data block in which media-specific and priority information is passed. This substructure is defined as:

typedef struct _NDIS_PACKET_OOB_DATA {
    Union {
        ULONGLONG   TimeToSend;
        ULONGLONG   TimeSent
         }
    ULONGLONG       TimeReceived;
    UINT            HeaderSize;
    UINT            SizeMediaSpecificInfo;
    PVOID           MediaSpecificInformation;
    NDIS_STATUS     Status;
    } NDIS_PACKET_OOB_DATA, *PNDIS_PACKET_OOB_DATA;

A miniport driver that has support for OOB data should use the NDIS macros provided for accessing such data. It should never attempt to calculate offsets or otherwise take actions that depend on knowing the exact structure of a packet's OOB data.

The NDIS macros for OOB data include the following:

 

 

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