Share via

NDIS_PACKET_8021Q_INFO (Windows Embedded CE 6.0)

  • Article

1/6/2010

The NDIS_PACKET_8021Q_INFO structure specifies packet information.

Syntax

Typedef struct _NDIS_PACKET_8021Q_INFO {    union {        struct {            UINT32  UserPriority:3;            UINT32  CanonicalFormatId:1;            UINT32  VlanId:12;            UINT32  Reserved:16;        } TagHeader;        PVOID  Value;    };} NDIS_PACKET_8021Q_INFO, *PNDIS_PACKET_8021Q_INFO;

Members

TagHeader

Specifies a member in the union contained in NDIS_PACKET_8021Q_INFO that can hold information about a packet in a structure with the following members:

UserPriority

Specifies 802.1p priority information, that is used to establish packet priority in shared-media 802 networks. The bits in this member specify an 802.1p priority value.

CanonicalFormatId

This member should be set to zero, which indicates that all MAC address information present in a packet is in canonical format (that is, simplest form).

VlanId

Identifies the VLAN to which a packet belongs. Outgoing packets are marked with the VLAN identifier.

Reserved

This member is reserved and should be set to zero.

Value

Specifies a member in the union contained in NDIS_PACKET_8021Q_INFO that can hold information about a packet in a buffer.

Remarks

When a miniport driver calls the NDIS_PER_PACKET_INFO_FROM_PACKET macro to retrieve or insert 802.1Q information in a packet descriptor, the macro returns this information in the Value member of the union contained in NDIS_PACKET_8021Q_INFO. The miniport driver uses the TagHeader member of the union to modify specific types of information, such as 802.1p priority and VLAN identifier information.

Requirements

Header winsock2.h
Windows Embedded CE Windows CE 5.0 and later

See Also

Reference

NDIS Structures
NDIS_PACKET_EXTENSION_FROM_PACKET
NDIS_PER_PACKET_INFO_FROM_PACKET