syntax = "proto2";

package ping_test;

option java_package = "com.google.android.chre.nanoapp.proto";
option java_outer_classname = "PingTest";

// Nanoapp message type can be either host to chre (H2C) or chre to host (C2H)
enum MessageType {
  // Reserved for corrupted messages
  UNDEFINED = 0;

  // H2C: A message to ping the nanoapp. The nanoapp will respond to the host
  // with a message, with options specified by this command.
  // Payload must be PingCommand.
  PING_COMMAND = 1;

  // C2H: A message indicating the test result. The ping test nanoapp will only
  // use this message to report a failure.
  // Payload must be chre_test_common.TestResult.
  TEST_RESULT = 2;

  // C2H: A message indicating a response from a ping command.
  // Payload is arbitrary.
  PING_RESPONSE = 3;
}

// A message to ping the nanoapp, with some optional specifications.
message PingCommand {
  // Specifies the permission to use in chreSendMessageWithPermissions().
  optional uint32 permissions = 1;
}