OID_DOT11_MPDU_MAX_LENGTH
Important The Native 802.11 Wireless LAN interface is deprecated in Windows 10 and later. Please use the WLAN Device Driver Interface (WDI) instead. For more information about WDI, see WLAN Universal Windows driver model.
When queried, the OID_DOT11_MPDU_MAX_LENGTH object identifier (OID) requests that the miniport driver return the value of the IEEE 802.11 aMPDUMaxLength attribute for the current PHY type on the 802.11 station.
The data type for this OID is a ULONG value.
The aMPDUMaxLength attribute defines the maximum length, in bytes, of a MAC protocol data unit (MPDU) frame that the PHY can transmit or receive. The following table lists the values of this attribute for the various 802.11 PHY types supported.
| PHY type | aMPDUMaxLength value |
|---|---|
dot11_phy_type_fhss |
4095 bytes |
dot11_phy_type_dsss |
4-8191 bytes |
dot11_phy_type_irbaseband |
2500 bytes |
dot11_phy_type_ofdm |
4095 bytes |
dot11_phy_type_hrdsss |
4095 bytes |
dot11_phy_type_erp |
4095 bytes |
Note The dot11_phy_type_ht and dot11_phy_type_vht PHY types do not appear in the table, because they have no aMPDUMaxLength attribute.
If the miniport driver is operating in Extensible Station (ExtSTA) mode, the current PHY type is determined through the ExtSTA msDot11CurrentPhyID management information base (MIB) object. This MIB object specifies the index of the current PHY type within the 802.11 station's list of supported PHY types. For more information about this MIB object, see OID_DOT11_CURRENT_PHY_ID.
If the aMPDUMaxLength value changes, the miniport driver must make a media-specific NDIS_STATUS_DOT11_MPDU_MAX_LENGTH_CHANGED indication. This indication notifies the operating system of the change in the maximum MPDU length supported on the 802.11 station.
Requirements
Version |
Available in Windows Vista and later versions of the Windows operating systems. |
Header |
Windot11.h (include Ndis.h) |
See also
Native 802.11 Wireless LAN OIDs