WLAN_RATE_SET structure (wlanapi.h)

The set of supported data rates.

Syntax

typedef struct _WLAN_RATE_SET {
  ULONG  uRateSetLength;
  USHORT usRateSet[DOT11_RATE_SET_MAX_LENGTH];
} WLAN_RATE_SET, *PWLAN_RATE_SET;

Members

uRateSetLength

The length, in bytes, of usRateSet.

usRateSet[DOT11_RATE_SET_MAX_LENGTH]

An array of supported data transfer rates. DOT11_RATE_SET_MAX_LENGTH is defined in windot11.h to have a value of 126.

Each supported data transfer rate is stored as a USHORT. The first bit of the USHORT specifies whether the rate is a basic rate. A basic rate is the data transfer rate that all stations in a basic service set (BSS) can use to receive frames from the wireless medium. If the rate is a basic rate, the first bit of the USHORT is set to 1.

To calculate the data transfer rate in Mbps for an arbitrary array entry rateSet[i], use the following equation:

rate_in_mbps = (rateSet[i] & 0x7FFF) * 0.5

Requirements

See also

WLAN_BSS_ENTRY