// Copyright 2020 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 = "proto2";

package location.nearby.mediums;

option optimize_for = LITE_RUNTIME;
option java_outer_classname = "WifiAwareFramesProto";
option java_package = "com.google.location.nearby.mediums.proto";

message WifiAwareFrame {
  enum FrameType {
    UNKNOWN_FRAME_TYPE = 0;
    HOST_NETWORK = 1;
    NETWORK_AVAILABLE = 2;
    IP_AVAILABLE = 3;
    CANCELLATION = 4;
  }
  optional FrameType type = 1;

  // Exactly one of the following fields will be set.
  optional HostNetworkFrame host_network = 2;
  optional NetworkAvailableFrame network_available = 3;
  optional IpAvailableFrame ip_available = 4;
  optional CancellationFrame cancellation = 7;

  // The id of each frame.
  optional int32 frame_id = 5;

  // A byte array of size 2. It is the id and comparable token of a WifiAware
  // endpoint session.
  optional bytes session_id = 6;
}

message HostNetworkFrame {}

message NetworkAvailableFrame {}

message IpAvailableFrame {
  // NOTE: We use string here, rather than int. This is because the WiFi Aware
  // ip address has a network interface appended to the end. It looks like
  // 'fe80::a321:2935:9b2d:d7e7%aware_data0', where the %aware_data0 at the end
  // lets Android know which type of network this address is associated with.
  // If this information is lost, we won't be able to connect to the remote
  // device's ServerSocket.
  optional string ip_address = 1;
  optional int32 port = 2;
}

message CancellationFrame {}