syntax = "proto3";

package bluetooth.l2cap.le;

import "google/protobuf/empty.proto";
import "facade/common.proto";

service L2capLeModuleFacade {
  rpc FetchL2capData(google.protobuf.Empty) returns (stream L2capPacket) {}
  // Initiate a credit based connection request and block until response is received for up to some timeout (2s)
  rpc OpenDynamicChannel(OpenDynamicChannelRequest) returns (OpenDynamicChannelResponse) {}
  rpc CloseDynamicChannel(CloseDynamicChannelRequest) returns (google.protobuf.Empty) {}
  rpc SetDynamicChannel(SetEnableDynamicChannelRequest) returns (google.protobuf.Empty) {}
  rpc SendDynamicChannelPacket(DynamicChannelPacket) returns (google.protobuf.Empty) {}
  rpc SetFixedChannel(SetEnableFixedChannelRequest) returns (google.protobuf.Empty) {}
  rpc SendFixedChannelPacket(FixedChannelPacket) returns (google.protobuf.Empty) {}
  rpc SendConnectionParameterUpdate(ConnectionParameter) returns (google.protobuf.Empty) {}
}

message L2capPacket {
  oneof channel_type {
    uint32 psm = 1;
    uint32 fixed_cid = 2;
  }
  bytes payload = 3;
}

message DynamicChannelOpenEvent {
  uint32 psm = 1;
  uint32 connection_response_result = 2;
}

message OpenDynamicChannelRequest {
  facade.BluetoothAddressWithType remote = 1;
  uint32 psm = 2;
}

message OpenDynamicChannelResponse {
  uint32 status = 1;
}

message CloseDynamicChannelRequest {
  facade.BluetoothAddressWithType remote = 1;
  uint32 psm = 2;
}

enum SecurityLevel {
  NO_SECURITY = 0;
  UNAUTHENTICATED_PAIRING_WITH_ENCRYPTION = 1;
  AUTHENTICATED_PAIRING_WITH_ENCRYPTION = 2;
  AUTHENTICATED_PAIRING_WITH_128_BIT_KEY = 3;
  AUTHORIZATION = 4;
}

message SetEnableDynamicChannelRequest {
  uint32 psm = 1;
  bool enable = 2;
  SecurityLevel security_level = 3;
}

message DynamicChannelPacket {
  facade.BluetoothAddressWithType remote = 1;
  uint32 psm = 2;
  bytes payload = 3;
}

message SetEnableFixedChannelRequest {
  uint32 cid = 1;
  bool enable = 2;
}

message FixedChannelPacket {
  facade.BluetoothAddressWithType remote = 1;
  uint32 cid = 2;
  bytes payload = 3;
}

message ConnectionParameter {
  uint32 conn_interval_min = 2;
  uint32 conn_interval_max = 3;
  uint32 conn_latency = 4;
  uint32 supervision_timeout = 5;
  uint32 min_ce_length = 6;
  uint32 max_ce_length = 7;
}