// Copyright 2016 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto2";
option optimize_for = LITE_RUNTIME;

package patchpanel;

// Best practice is to use optional fields, but since the client and server
// are always in sync, these messages use required fields to save on
// validation.

// If |br_ifname| exists in the message, a creation or deletion event
// occurred for the bridge interface.
// Otherwise, the event is occurred for the physical interface
// |dev_ifname|.
message DeviceMessage {
  required string dev_ifname = 1;
  optional string br_ifname = 2;
  optional bool teardown = 3;  // value is ignored
  optional string guest_ip6addr = 4;
}

message GuestMessage {
  enum GuestType {
    UNKNOWN_GUEST = 0;
    ARC = 1;         // ARC++ Container (P & higher)
    ARC_VM = 2;      // ARC VM
    TERMINA_VM = 3;  // Crostini Termina VM
    PLUGIN_VM = 4;   // Plugin VM
  }
  required GuestType type = 1;

  enum GuestEvent {
    UNKNOWN_EVENT = 0;
    START = 1;
    STOP = 2;
  }
  required GuestEvent event = 2;

  // The PID of the ARC++ container.
  optional int32 arc_pid = 3;

  // The VSOCK CID of the ARCVM.
  optional int32 arcvm_vsock_cid = 4;
}

message IpHelperMessage {
  oneof message_type {
    GuestMessage guest_message = 1;
    DeviceMessage device_message = 2;
  }
}