fuchsia.bluetooth.bredr

PROTOCOLS

Profile

Defined in fuchsia.bluetooth.bredr/profile.fidl

Profile provides Bluetooth services a way to register a service definition, making that service discoverable by remote peers. Registered services will receive L2CAP connections made to the services advertised in the definition, and can open connections to remote connected devices. To discover possible connected devices, devices should use AddSearch to search any remote devices.

AddService

Register a service. This service will be registered and discoverable with the Service Discovery Protocol server. The security_level provided here will be required before a connection is established. If devices is true, connections to the service's channels will create a device instead of producing an OnConnected event. Returns status for success or error. If successful, a unique service_id is returned to identify this service.

Request

Name	Type
`definition`	`ServiceDefinition`
`sec_level`	`SecurityLevel`
`devices`	`bool`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`
`service_id`	`uint64`

AddSearch

Register a search for services on remote devices. An OnServiceFound event will be produced each time a device is connected that has a service matching service_uuid with the additional attributes in attr_ids. The ProtocolDescriptor should be requested to obtain information to connect to a service. If attr_ids is empty, all attributes will be requested. See the SDP Specification (Core Spec 5.0, Vol 3, Part B, Section 5) and the relevant profile specification documents.

Request

Name	Type
`service_uuid`	`ServiceClassProfileIdentifier`
`attr_ids`	`vector<uint16>`

RemoveService

Removes a previously-registered service, disconnecting all clients.

Request

Name	Type
`service_id`	`uint64`

ConnectL2cap

Connect a channel to the connected remote device peer_id using the protocol and channel listed. For L2CAP, dynamic PSMs can be specified. See the defined PSMs in service.fidl Returns the channel after it has been connected. status will indicate an error if the channel could not be connected.

Request

Name	Type
`peer_id`	`string`
`psm`	`uint16`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`
`channel`	`handle<socket>?`

OnConnected

Produced when a protocol channel is connected for this profile. channel contains the channel connected to, and information about the protocol is provided in protocol. All protocols supported internally will be handled, for example an RFCOMM socket will be provided instead of an L2CAP socket if the services protocol descriptor includes it.

Response

Name	Type
`device_id`	`string`
`service_id`	`uint64`
`channel`	`handle<socket>`
`protocol`	`ProtocolDescriptor`

OnServiceFound

Produced when a search this client added finds a matching service on a remote device. peer_id is the device the service was found on, and profile includes the Profile Descriptor which matches the service_uuid searched for, with the major and minor version reported by the remote device. attributes contains all attributes retrieved from the remote device. It may include attributes not requested in the search.

Response

Name	Type
`peer_id`	`string`
`profile`	`ProfileDescriptor`
`attributes`	`vector<Attribute>`

STRUCTS

DataElement

Defined in fuchsia.bluetooth.bredr/service.fidl

Name	Type	Default
`type`	`DataElementType`	No default
`size`	`uint32`	No default
`data`	`DataElementData`	No default

ProtocolDescriptor

Defined in fuchsia.bluetooth.bredr/service.fidl

Identifies a communications protocol along with protocol-specific parameters.

Name	Type	Description	Default
`protocol`	`ProtocolIdentifier`		No default
`params`	`vector<DataElement>`		No default

ProfileDescriptor

Defined in fuchsia.bluetooth.bredr/service.fidl

A description of a profile that this service conforms to.

Name	Type	Default
`profile_id`	`ServiceClassProfileIdentifier`	No default
`major_version`	`uint8`	No default
`minor_version`	`uint8`	No default

Information

Defined in fuchsia.bluetooth.bredr/service.fidl

Human-readable information about a service. Strings are encoded in UTF-8.

Name	Type	Description	Default
`language`	`string`	Language that is represented. Must be two characters long and a valid ICO 639:1988 identifier.	No default
`name`	`string?`	Service name	No default
`description`	`string?`	A human-readable description	No default
`provider`	`string?`	The provider of this service (person or organization)	No default

Attribute

Defined in fuchsia.bluetooth.bredr/service.fidl

A generic attribute, used for protocol information;

Name	Type	Description	Default
`id`	`uint16`		No default
`element`	`DataElement`		No default

ServiceDefinition

Defined in fuchsia.bluetooth.bredr/service.fidl

Name	Type	Description	Default
`service_class_uuids`	`vector<string>`	UUIDs of service classes that this service record conforms to.	No default
`protocol_descriptors`	`vector<ProtocolDescriptor>`	The protocols that can be used to gain access to this service, with their protocol-specific identifiers. This is ordered from lowest level to highest.	No default
`additional_protocol_descriptors`	`vector<vector>?`	Additional protocol descriptor lists, if the service requires more channels in addition to the main service.	No default
`profile_descriptors`	`vector<ProfileDescriptor>`	Bluetooth profiles that are supported by this service.	No default
`information`	`vector<Information>`	Human-readable service information, in one or more languages. The first set of information is considered the primary language.	No default
`additional_attributes`	`vector<Attribute>?`	Additional attributes included in the Service Definition, for specific services. All of these attributes should have an Attribute ID above 0x0200.	No default

ENUMS

SecurityLevel

Type: uint32

Defined in fuchsia.bluetooth.bredr/profile.fidl

Name	Value	Description
`NONE`	`0`
`ENCRYPTION_OPTIONAL`	`1`
`ENCRYPTION_REQUIRED`	`2`
`MITM_PROTECTED`	`3`
`HIGH_STRENGTH`	`4`

DataElementType

Type: uint32

Defined in fuchsia.bluetooth.bredr/service.fidl

A building element in SDP. Used for various low-level and custom parameters.

Name	Value	Description
`NOTHING`	`0`
`UNSIGNED_INTEGER`	`1`
`SIGNED_INTEGER`	`2`
`UUID`	`3`
`STRING`	`4`
`BOOLEAN`	`5`
`SEQUENCE`	`6`
`ALTERNATIVE`	`7`

ProtocolIdentifier

Type: uint16

Defined in fuchsia.bluetooth.bredr/service.fidl

Defined Protocol Identifiers for the Protocol Descriptor We intentionally omit deprecated profile identifiers. From Bluetooth Assigned Numbers: https://www.bluetooth.com/specifications/assigned-numbers/service-discovery

Name	Value	Description
`SDP`	`1`
`RFCOMM`	`3`
`ATT`	`7`
`OBEX`	`8`
`BNEP`	`15`
`HIDP`	`17`
`HardcopyControlChannel`	`18`
`HardcopyDataChannel`	`20`
`HardcopyNotification`	`22`
`AVCTP`	`23`
`AVDTP`	`25`
`MCAPControlChannel`	`30`
`MCAPDataChannel`	`31`
`L2CAP`	`256`

ServiceClassProfileIdentifier

Type: uint32

Defined in fuchsia.bluetooth.bredr/service.fidl

Identifiers that are valid for Bluetooth Classes / Profiles We intentionally omit classes and profile IDs that are unsupported, deprecated, or reserved for use by Fuchsia Bluetooth. From Bluetooth Assigned Numbers for SDP https://www.bluetooth.com/specifications/assigned-numbers/service-discovery

Name	Value	Description
`SerialPort`	`4353`	ServiceDiscoveryService and BrowseGroupDescriptorService used by Fuchsia
`DialupNetworking`	`4355`
`ObexObjectPush`	`4357`
`ObexFileTransfer`	`4358`
`Headset`	`4360`	Headset Profile (HSP)
`HeadsetAudioGateway`	`4370`
`HeadsetHS`	`4401`
`AudioSource`	`4362`	Advanced Audio Distribution Profile (A2DP)
`AudioSink`	`4363`
`AdvancedAudioDistribution`	`4365`
`AVRemoteControlTarget`	`4364`	Audio/Video Remote Control Profil (AVRCP)
`AVRemoteControl`	`4366`
`AVRemoteControlController`	`4367`
`PANU`	`4373`	Personal Area Networking (PAN)
`NAP`	`4374`
`GN`	`4375`
`Handsfree`	`4382`	Basic Printing and Basic Imaging Profiles omitted (unsupported) Hands-Free Profile (HFP)
`HandsfreeAudioGateway`	`4383`
`SIM_Access`	`4397`	Human Interface Device and Hardcopy Cable Replacement Profile omitted (unsupported)
`PhonebookPCE`	`4398`	Phonebook Access Profile (PBAP)
`PhonebookPSE`	`4399`
`Phonebook`	`4400`
`MessageAccessServer`	`4402`	Message Access Profile (MAP)
`MessageNotificationServer`	`4403`
`MessageAccessProfile`	`4404`
`MPSProfile`	`4410`	GNSS and 3DSP omitted (unsupported) Multi-Profile Specification (MPS)
`MPSClass`	`4411`
`VideoSource`	`4867`	Calendar, Task, and Notes Profile omitted (unsupported) Device ID used by Fuchsia Video Distribution Profile (VDP)
`VideoSink`	`4868`
`VideoDistribution`	`4869`
`HDP`	`5120`	Health Device Profile (HDP)
`HDPSource`	`5121`
`HDPSink`	`5122`

UNIONS

DataElementData

Defined in fuchsia.bluetooth.bredr/service.fidl

Name	Type	Description
`integer`	`int64`
`str`	`string?`
`uuid`	`string?`
`b`	`bool`
`bytes`	`vector<uint8>?`
`sequence`	`vector<DataElement>`

CONSTANTS

Name	Value	Type	Description
kPSM_SDP	`1`	`int64`	Defined PSMs from the Bluetooth Assigned Numbers https://www.bluetooth.com/specifications/assigned-numbers/logical-link-control Used in DataElementData for protocol parameters for L2CAP.
kPSM_RFCOMM	`3`	`int64`
kPSM_TCSBIN	`5`	`int64`
kPSM_TCSBINCordless	`7`	`int64`
kPSM_BNEP	`15`	`int64`
kPSM_HIDControl	`17`	`int64`
kPSM_HIDInterrupt	`19`	`int64`
kPSM_AVCTP	`23`	`int64`
kPSM_AVDTP	`25`	`int64`
kPSM_AVCTP_Browse	`27`	`int64`
kPSM_ATT	`31`	`int64`
kPSM_3DSP	`33`	`int64`
kPSM_LE_IPSP	`35`	`int64`
kPSM_OTS	`37`	`int64`
ATTR_SERVICE_RECORD_HANDLE	`0`	`uint16`	Universal attribute IDs. From the Bluetooth Specification, Version 5, Vol 3, Part B
ATTR_SERVICE_CLASS_ID_LIST	`1`	`uint16`
ATTR_SERVICE_RECORD_STATE	`2`	`uint16`
ATTR_SERVICE_ID	`3`	`uint16`
ATTR_PROTOCOL_DESCRIPTOR_LIST	`4`	`uint16`
ATTR_ADDITIONAL_PROTOCOL_DESCRIPTOR_LIST	`13`	`uint16`
ATTR_BROWSE_GROUP_LIST	`5`	`uint16`
ATTR_LANGUAGE_BASE_ATTRIBUTE_ID_LIST	`6`	`uint16`
ATTR_SERVICE_INFO_TIME_TO_LIVE	`7`	`uint16`
ATTR_SERVICE_AVAILABILITY	`8`	`uint16`
ATTR_BLUETOOTH_PROFILE_DESCRIPTOR_LIST	`9`	`uint16`