// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

option java_outer_classname = "HostProto";

package pandora;

import "google/protobuf/empty.proto";
import "google/protobuf/any.proto";

// Service to trigger Bluetooth Host procedures
//
// At startup, the Host must be in BR/EDR connectable mode
// (see GAP connectability modes).
service Host {
  // Factory reset the host.
  // **After** responding to this command, the gRPC server should loose
  // all its state.
  // This is comparable to a process restart or an hardware reset.
  // The gRPC server might take some time to be available after
  // this command.
  rpc FactoryReset(google.protobuf.Empty) returns (google.protobuf.Empty);
  // Reset the host by performing an HCI reset. Previous bonds must
  // not be removed and the gRPC server must not be restarted.
  rpc Reset(google.protobuf.Empty) returns (google.protobuf.Empty);
  // Read the local Bluetooth device address.
  // This should return the same value as a Read BD_ADDR HCI command.
  rpc ReadLocalAddress(google.protobuf.Empty) returns (ReadLocalAddressResponse);
  // Create an ACL BR/EDR connection to a peer.
  // If the two devices have not established a previous bond,
  // the peer must be discoverable.
  // Whether this also triggers pairing (i.e. authentication and/or encryption)
  // is implementation defined:
  // some Bluetooth Host stack trigger pairing when ACL connection is being
  // established, others when a profile or service requiring a specific
  // security level is being opened. If it does trigger pairing, pairing events
  // shall be handled through `Security.OnPairing` if a corresponding stream
  // has been opened prior to this call, otherwise, they shall be automatically
  // confirmed by the host before this method returns.
  rpc Connect(ConnectRequest) returns (ConnectResponse);
  // Get an active ACL BR/EDR connection to a peer.
  rpc GetConnection(GetConnectionRequest) returns (GetConnectionResponse);
  // Wait for an ACL BR/EDR connection from a peer.
  rpc WaitConnection(WaitConnectionRequest) returns (WaitConnectionResponse);
  // Create an ACL LE connection.
  // Unlike BR/EDR `Connect`, this must not trigger or wait any
  // pairing/encryption and return as soon as the connection is complete.
  rpc ConnectLE(ConnectLERequest) returns (ConnectLEResponse);
  // Get an active ACL LE connection to a peer.
  rpc GetLEConnection(GetLEConnectionRequest) returns (GetLEConnectionResponse);
  // Wait for an ACL LE connection from a peer.
  rpc WaitLEConnection(WaitLEConnectionRequest) returns (WaitLEConnectionResponse);
  // Disconnect an ACL connection.
  // The related Connection must not be reused afterwards.
  rpc Disconnect(DisconnectRequest) returns (google.protobuf.Empty);
  // Wait for disconnection of an ACL connection.
  rpc WaitDisconnection(WaitDisconnectionRequest) returns (google.protobuf.Empty);
  // Create and enable an advertising set using legacy or extended advertising,
  // except periodic advertising.
  rpc StartAdvertising(StartAdvertisingRequest) returns (StartAdvertisingResponse);
  // Remove an advertising set.
  rpc StopAdvertising(StopAdvertisingRequest) returns (google.protobuf.Empty);
  // Run LE scanning and return each device found.
  // Canceling the `Scan` stream shall stop scanning.
  rpc Scan(ScanRequest) returns (stream ScanningResponse);
  // Start BR/EDR inquiry and returns each device found.
  // Canceling the `Inquiry` stream shall stop inquiry.
  rpc Inquiry(google.protobuf.Empty) returns (stream InquiryResponse);
  // Set BR/EDR discoverability mode.
  rpc SetDiscoverabilityMode(SetDiscoverabilityModeRequest) returns (google.protobuf.Empty);
  // Set BR/EDR connectability mode.
  rpc SetConnectabilityMode(SetConnectabilityModeRequest) returns (google.protobuf.Empty);
  // Get remote device name from connection.
  rpc GetRemoteName(GetRemoteNameRequest) returns (GetRemoteNameResponse);
}

// Bluetooth device own address type.
enum OwnAddressType {
  PUBLIC = 0x0;
  RANDOM = 0x1;
  RESOLVABLE_OR_PUBLIC = 0x2;
  RESOLVABLE_OR_RANDOM = 0x3;
}

// Advertisement primary PHY types.
enum PrimaryPhy {
  PRIMARY_1M = 0;
  PRIMARY_CODED = 2;
}

// Advertisement secondary PHY types.
enum SecondaryPhy {
  SECONDARY_1M = 0;
  SECONDARY_2M = 1;
  SECONDARY_CODED = 2;
}

// Discoverability modes.
enum DiscoverabilityMode {
  NOT_DISCOVERABLE = 0;
  DISCOVERABLE_LIMITED = 1;
  DISCOVERABLE_GENERAL = 2;
}

// Connectability modes (BR/EDR only).
enum ConnectabilityMode {
  NOT_CONNECTABLE = 0;
  CONNECTABLE = 1;
}

// A Token representing an ACL connection.
// It's acquired via a `Connect` or `ConnectLE`.
message Connection {
  // Opaque value filled by the gRPC server, must not be modified nor crafted.
  google.protobuf.Any cookie = 1;
}

// A Token representing an Advertising set.
// It's acquired via a `StartAdvertising` on the Host service.
message AdvertisingSet {
  // Opaque value filled by the gRPC server, must not be modified nor crafted.
  google.protobuf.Any cookie = 1;
}

// Data types notably used for Extended Inquiry Response and Advertising Data.
// The Flags data type is mandatory must be automatically set by the IUT and is
// not exposed here.
// include_<data type> are used in advertising requests for data types
// which may not be exposed to the user and that must be set by the IUT
// when specified.
// See Core Supplement, Part A, Data Types for details.
message DataTypes {
  repeated string incomplete_service_class_uuids16 = 1; // Incomplete List of 16bit Service Class UUIDs
  repeated string complete_service_class_uuids16 = 2; // Complete List of 16bit Service Class UUIDs
  repeated string incomplete_service_class_uuids32 = 3; // Incomplete List of 32bit Service Class UUIDs
  repeated string complete_service_class_uuids32 = 4; // Complete List of 32bit Service Class UUIDs
  repeated string incomplete_service_class_uuids128 = 5; // Incomplete List of 128bit Service Class UUIDs
  repeated string complete_service_class_uuids128 = 6; // Complete List of 128bit Service Class UUIDs
  // Shortened Local Name
  oneof shortened_local_name_oneof {
    string shortened_local_name = 7;
    bool include_shortened_local_name = 8;
  }
  // Complete Local Name
  oneof complete_local_name_oneof {
    string complete_local_name = 9;
    bool include_complete_local_name = 10;
  }
  // Tx Power Level
  oneof tx_power_level_oneof {
    uint32 tx_power_level = 11;
    bool include_tx_power_level = 12;
  }
  //  Class of Device
  oneof class_of_device_oneof {
    uint32 class_of_device = 13;
    bool include_class_of_device = 14;
  }
  uint32 peripheral_connection_interval_min = 15; // Peripheral Connection Interval Range minimum value, 16 bits
  uint32 peripheral_connection_interval_max = 16; // Peripheral Connection Interval Range maximum value, 16 bits
  repeated string service_solicitation_uuids16 = 17; // List of 16bit Service Solicitation UUIDs
  repeated string service_solicitation_uuids128 = 18; // List of 128bit Service Solicitation UUIDs
  map<string, bytes> service_data_uuid16 = 19; // Service Data 16bit UUID
  repeated bytes public_target_addresses = 20; // Public Target Addresses
  repeated bytes random_target_addresses = 21; // Random Target Addresses
  uint32 appearance = 22; // Appearance (16bits)
  // Advertising Interval
  oneof advertising_interval_oneof {
    uint32 advertising_interval = 23; // 16 bits
    bool include_advertising_interval = 24;
  }
  repeated string service_solicitation_uuids32 = 25; // List of 32bit Service Solicitation UUIDs
  map<string, bytes> service_data_uuid32 = 26; // Service Data 32bit UUID
  map<string, bytes> service_data_uuid128 = 27; // Service Data 128bit UUID
  string uri = 28; // URI
  bytes le_supported_features = 29; // LE Supported Features
  bytes manufacturer_specific_data = 30; // Manufacturer Specific Data
  DiscoverabilityMode le_discoverability_mode = 31; // Flags LE Discoverability Mode
}

// Response of the `ReadLocalAddress` method.
message ReadLocalAddressResponse {
  // Local Bluetooth device address as array of 6 bytes.
  bytes address = 1;
}

// Request of the `Connect` method.
message ConnectRequest {
  // Peer Bluetooth device address as array of 6 bytes.
  bytes address = 1;
}

// Response of the `Connect` method.
message ConnectResponse {
  // Response result.
  oneof result {
    // Connection on `Connect` success
    Connection connection = 1;
    // Peer not found error.
    google.protobuf.Empty peer_not_found = 2;
    // A connection with peer already exists.
    google.protobuf.Empty connection_already_exists = 3;
    // Pairing failure error.
    google.protobuf.Empty pairing_failure = 4;
    // Authentication failure error.
    google.protobuf.Empty authentication_failure = 5;
    // Encryption failure error.
    google.protobuf.Empty encryption_failure = 6;
  }
}

// Request of the `GetConnection` method.
message GetConnectionRequest {
  // Peer Bluetooth device address as array of 6 bytes.
  bytes address = 1;
}

// Response of the `GetConnection` method.
message GetConnectionResponse {
  // Response result.
  oneof result {
    // Connection on `GetConnection` success
    Connection connection = 1;
    // Peer not found error.
    google.protobuf.Empty peer_not_found = 2;
  }
}

// Request of the `WaitConnection` method.
message WaitConnectionRequest {
  // Peer Bluetooth device address as array of 6 bytes.
  bytes address = 1;
}

// Response of the `WaitConnection` method.
message WaitConnectionResponse {
  // Response result.
  oneof result {
    // Connection on `WaitConnection` success
    Connection connection = 1;
  }
}

// Request of the `ConnectLE` method.
message ConnectLERequest {
  // Own address type.
  OwnAddressType own_address_type = 1;
  // Peer Bluetooth device address as array of 6 bytes.
  oneof address {
    // Public device address.
    bytes public = 2;
    // Random device address.
    bytes random = 3;
    // Public identity device address.
    bytes public_identity = 4;
    // Random (static) identity device address.
    bytes random_static_identity = 5;
  }
}

// Response of the `ConnectLE` method.
message ConnectLEResponse {
  // Response result.
  oneof result {
    // Connection on `ConnectLE` success
    Connection connection = 1;
    // Peer not found error.
    google.protobuf.Empty peer_not_found = 2;
    // A connection with peer already exists.
    google.protobuf.Empty connection_already_exists = 3;
  }
}

// Request of the `GetLEConnection` method.
message GetLEConnectionRequest {
  // Peer Bluetooth device address as array of 6 bytes.
  oneof address {
    // Public device address.
    bytes public = 1;
    // Random device address.
    bytes random = 2;
    // Public identity device address.
    bytes public_identity = 3;
    // Random (static) identity device address.
    bytes random_static_identity = 4;
  }
}

// Response of the `GetLEConnection` method.
message GetLEConnectionResponse {
  // Response result.
  oneof result {
    // Connection on `GetLEConnection` success
    Connection connection = 1;
    // Peer not found error.
    google.protobuf.Empty peer_not_found = 2;
  }
}

// Request of the `WaitLEConnection` method.
message WaitLEConnectionRequest {
  // Peer Bluetooth device address as array of 6 bytes.
  oneof address {
    // Public device address.
    bytes public = 1;
    // Random device address.
    bytes random = 2;
    // Public identity device address.
    bytes public_identity = 3;
    // Random (static) identity device address.
    bytes random_static_identity = 4;
  }
}

// Response of the `WaitLEConnection` method.
message WaitLEConnectionResponse {
  // Response result.
  oneof result {
    // Connection on `WaitLEConnection` success
    Connection connection = 1;
  }
}

// Request of the `Disconnect` method.
message DisconnectRequest {
  // Connection that should be disconnected.
  Connection connection = 1;
}

// Request of the `WaitDisconnection` method.
message WaitDisconnectionRequest {
  // Connection to wait disconnection from.
  Connection connection = 1;
}

// Request of the `StartAdvertising` method.
message StartAdvertisingRequest {
  // `true` to use legacy advertising.
  // The implementation shall fail when set to `false` and
  // extended advertising is not supported.
  bool legacy = 1;
  // Advertisement data.
  DataTypes data = 2;
  // If none, the device is not scannable.
  DataTypes scan_response_data = 3;
  // Target Bluetooth device address as array of 6 bytes.
  // If none, advertisement is undirected.
  oneof target {
    // Public device address or public identity address.
    bytes public = 4;
    // Random device address or random (static) identity address.
    bytes random = 5;
  }
  // Own address type to advertise.
  OwnAddressType own_address_type = 6;
  // `true` if the device is connectable.
  bool connectable = 7;
  // Interval & range of the advertisement.
  float interval = 8;
  // If not specified, the IUT is free to select any interval min and max
  // which comprises the specified interval.
  float interval_range = 9;
  // Extended only: primary PHYs.
  PrimaryPhy primary_phy = 10;
  // Extended only: secondary PHYs.
  SecondaryPhy secondary_phy = 11;
}

// Response of the `StartAdvertising` method.
message StartAdvertisingResponse {
  AdvertisingSet set = 1;
}

// Request of the `StopAdvertising` method.
message StopAdvertisingRequest {
  // AdvertisingSet that should be stopped.
  AdvertisingSet set = 1;
}

// Request of the `Scan` method.
message ScanRequest {
  // `true` the use legacy scanning.
  // The implementation shall fail when set to `false` and
  // extended scanning is not supported.
  bool legacy = 1;
  // Scan in passive mode (versus active one).
  bool passive = 2;
  // Own address type.
  OwnAddressType own_address_type = 3;
  // Interval & window of the scan.
  float interval = 4;
  float window = 5;
  // Scanning PHYs.
  repeated PrimaryPhy phys = 6;
}

// Response of the `Scan` method.
message ScanningResponse {
  // `true` if the response is legacy.
  bool legacy = 1;
  // Peer Bluetooth device address as array of 6 bytes.
  oneof address {
    // Public device address.
    bytes public = 2;
    // Random device address.
    bytes random = 3;
    // Public identity device address (corresponds to resolved private address).
    bytes public_identity = 4;
    // Random (static) identity device address (corresponds to resolved private address).
    bytes random_static_identity = 5;
  }
  // Direct Bluetooth device address as array of 6 bytes.
  oneof direct_address {
    // Public device address.
    bytes direct_public = 6;
    // Non-resolvable private address or static device address.
    bytes direct_non_resolvable_random = 7;
    // Resolvable private address (resolved by controller).
    bytes direct_resolved_public = 8;
    // Resolvable private address (resolved by controller).
    bytes direct_resolved_random = 9;
    // Resolvable private address (controller unable to resolve).
    bytes direct_unresolved_random = 10;
  }
  // `true` if the peer is connectable.
  bool connectable = 11;
  // `true` if the peer is scannable.
  bool scannable = 12;
  // `true` if the `undirected.data` is truncated.
  // This indicates that the advertisement data are truncated.
  bool truncated = 13;
  // Advertising SID from 0x00 to 0x0F.
  uint32 sid = 14;
  // On extended only: primary PHYs.
  PrimaryPhy primary_phy = 15;
  // On extended only: secondary PHYs.
  SecondaryPhy secondary_phy = 16;
  // TX power in dBm, range: -127 to +20.
  int32 tx_power = 17;
  // Received Signal Strenght Indication in dBm, range: -127 to +20.
  int32 rssi = 18;
  // Interval of the periodic advertising, 0 if not periodic
  // or within 7.5 ms to 81,918.75 ms range.
  float periodic_advertising_interval = 19;
  // Scan response data.
  DataTypes data = 20;
}

// Response of the `Inquiry` method.
message InquiryResponse {
  bytes address = 1;
  uint32 page_scan_repetition_mode = 2;
  uint32 class_of_device = 3;
  uint32 clock_offset = 4;
  int32 rssi = 5;
  DataTypes data = 6;
}

// Request of the `SetDiscoverabilityMode` method.
message SetDiscoverabilityModeRequest {
  DiscoverabilityMode mode = 1;
}

// Request of the `SetConnectabilityMode` method.
message SetConnectabilityModeRequest {
  ConnectabilityMode mode = 1;
}

// Request of the `GetRemoteName` method.
message GetRemoteNameRequest {
  oneof remote {
    // ACL connection with remote device.
    Connection connection = 1;
    // Remote Bluetooth device address as array of 6 bytes.
    bytes address = 2;
  }
}

// Response of the `GetRemoteName` method.
message GetRemoteNameResponse {
  // Response result.
  oneof result {
    // Remote name on `GetRemoteName` success.
    string name = 1;
    // Remote not found error.
    google.protobuf.Empty remote_not_found = 2;
  }
}