2.2.2.2.3 Bluetooth: Advertising Beacon

Bluetooth devices advertise over a beacon. This is the basic beacon structure:

Length (1 byte): Set to 30 (0x1E).

0xFF (1 byte): Fixed value 0xFF.

Microsoft ID (2 bytes): Set to 0006

Beacon Data (24 bytes): The beacon data section is further broken down. Note that the Scenario and Subtype Specific Data section requirements will differ based on the Scenario and Subtype.

Scenario_Type (1 byte): Set to (1) Bluetooth scenario.

Version_and_Device_Type (1 byte): The high three bits are set to 001 for the version number; the lower 5 bits are set to Device Type SKU values as follows, as defined in section 2.2.2.2.2.

Value	Meaning
1	Xbox One
6	Apple iPhone
7	Apple iPad
8	Android device
9	Windows 10 Desktop
11	Windows 10 Phone
12	Linux device
13	Windows IoT
14	Surface Hub
15	Windows laptop
16	Windows tablet

Version_and_Flags (1 byte): The high 3 bits are set to 001; the lower 5 bits are set to 00000 or 00001. Setting the lower 5 bits to 00001 indicates that the NearBy share setting is everyone rather than only my devices.

Flags_and_Device_Status (1 byte): The field has the following structure.

0	1	2	3	4	5	6	7
A		B	C	D

A (2 bits): Unused.

B - Bluetooth_Address_As_Device_ID (1 bit): When set, indicates that the Bluetooth address can be used as the device ID.

C (1 bit): Unused.

D - ExtendedDeviceStatus (4 bits): One of the values in the following table. Values may be ORed.

Value	Meaning
None 0x00	None.
RemoteSessionsHosted 0x01	Hosted by remote session.
RemoteSessionsNotHosted 0x02	Indicates the device does not have session hosting status available.<5>
NearShareAuthPolicySameUser 0x04	Indicates the device supports NearShare if the user is the same for the other device.
NearShareAuthPolicyPermissive 0x08	Indicates the device supports NearShare.<6>

Salt (4 bytes): Four random bytes.

Device_Hash (19 bytes): SHA256 Hash of Salt plus Device Thumbprint.