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OID_DOT11_DESIRED_SSID_LIST (Compact 7)

  • Article

3/12/2014

When set, the OID_DOT11_DESIRED_SSID_LIST object identifier (OID) requests that the miniport driver set the value of the Extensible Station (ExtSTA) msDot11DesiredSSIDList management information base (MIB) object to the specified data.

When queried, OID_DOT11_DESIRED_SSID_LIST requests that the miniport driver return the value of the msDot11DesiredSSIDList MIB object.

The msDot11DesiredSSIDList MIB object specifies the list of 802.11 service set identifiers (SSIDs) that the 802.11 station uses when it connects to a basic service set (BSS) network. After OID_DOT11_CONNECT_REQUEST is set, the 802.11 station tries to connect to a BSS with an service set identifier (SSID) that matches an entry from this list.

The data type for OID_DOT11_DESIRED_SSID_LIST is the DOT11_SSID_LIST structure.

The operating system can define a desired SSID list that contains a single SSID; however, a service developed by the independent hardware vendor (IHV) can define a list that contains one or more SSIDs.

An SSID with the uSSIDLength member of the DOT11_SSID structure set to zero is a wildcard SSID. The wildcard SSID matches any SSID.

A desired SSID list that contains a wildcard SSID cannot contain other SSIDs. When OID_DOT11_DESIRED_SSID_LIST is set, the miniport driver must fail the request by returning NDIS_STATUS_INVALID_DATA from its MiniportOidRequest function if the SSIDs array contains a wildcard SSID and uNumOfEntries is greater than one.

After the OID_DOT11_CONNECT_REQUEST OID is set, the 802.11 station performs a connection operation to a BSS network only if the SSID of the BSS is in the desired SSID list. If the desired SSID list contains a wildcard SSID, the 802.11 station can connect to any BSS network. The 802.11 station cannot connect to any BSS if its desired SSID list is empty.

When OID_DOT11_DESIRED_SSID_LIST is set, the miniport driver must fail the set request if the uNumOfEntries member has a value greater than the value of uDesiredSSIDListSize that the driver previously returned through a query of OID_DOT11_EXTSTA_CAPABILITY. In this case, the miniport driver must return NDIS_STATUS_INVALID_LENGTH from its MiniportOidRequest function.

When OID_DOT11_DESIRED_SSID_LIST is queried, the miniport driver must verify that the InformationBuffer member of the MiniportOidRequest function’s OidRequest parameter is large enough to return the complete DOT11_SSID_LIST structure. This includes all entries in the SSIDs array. The value of the InformationBufferLength member of the OidRequest parameter determines what the miniport driver must do, as the following list shows:

  • If the value of the InformationBufferLength member is less than the length in bytes of the complete DOT11_SSID_LIST structure, the miniport driver must do the following:
    • Set the uNumOfEntries member to zero
    • Set the uTotalNumOfEntries member to the number of entries in the SSIDs array
      For the OidRequest parameter, set the BytesWritten member to zero and the BytesNeeded member to the length, in bytes, of the complete DOT11_SSID_LIST structure.
    • Fail the query request by returning NDIS_STATUS_BUFFER_OVERFLOW from its MiniportOidRequest function
  • If the value of the InformationBufferLength member is greater than or equal to than the length, in bytes, of the DOT11_SSID_LIST structure, the miniport driver must do the following to complete a successful query request:
    • For the DOT11_SSID_LIST structure, set the uNumOfEntries and uTotalNumOfEntries members to the total number of entries in the SSIDs array
    • For the OidRequest parameter, set the BytesNeeded member to zero and the BytesWritten member to the length, in bytes, of the entire DOT11_SSID_LIST structure. The miniport driver must also copy the entire DOT11_SSID_LIST structure to the InformationBuffer member.
    • Return NDIS_STATUS_SUCCESS from its MiniportOidRequest function

The default case for the msDot11DesiredSSIDList MIB object is an empty list that has uNumEntries set to zero. The miniport driver must set this MIB object to its default whenever the following occurs:

Requirements

Header

windot11.h

See Also

Reference

Native 802.11 Extensible Station OIDs
OID_DOT11_CONNECT_REQUEST
NDIS_OBJECT_HEADER
DOT11_SSID_LIST
MiniportOidRequest
OID_DOT11_EXTSTA_CAPABILITY
MiniportInitializeEx
OID_DOT11_RESET_REQUEST
DOT11_RESET_REQUEST
Native 802.11 Wireless LAN OIDs

Other Resources

DOT11_SSID