// Copyright 2018 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.

#include "shill/virtual_device.h"

#include <netinet/ether.h>
#include <linux/if.h>  // NOLINT - Needs definitions from netinet/ether.h

#include <memory>
#include <string>

#include "shill/logging.h"
#include "shill/net/rtnl_handler.h"

#include <base/logging.h>

namespace shill {

namespace Logging {
static auto kModuleLogScope = ScopeLogger::kDevice;
static std::string ObjectID(const VirtualDevice* v) {
  return "(virtual_device)";
}
}  // namespace Logging

namespace {
const char kHardwareAddressEmpty[] = "";
}  // namespace

VirtualDevice::VirtualDevice(Manager* manager,
                             const std::string& link_name,
                             int interface_index,
                             Technology technology)
    : Device(manager,
             link_name,
             kHardwareAddressEmpty,
             interface_index,
             technology) {}

VirtualDevice::~VirtualDevice() = default;

bool VirtualDevice::Load(const StoreInterface* /*storage*/) {
  // Virtual devices have no persistent state.
  return true;
}

bool VirtualDevice::Save(StoreInterface* /*storage*/) {
  // Virtual devices have no persistent state.
  return true;
}

void VirtualDevice::Start(Error* error,
                          const EnabledStateChangedCallback& /*callback*/) {
  if (!fixed_ip_params()) {
    rtnl_handler()->SetInterfaceFlags(interface_index(), IFF_UP, IFF_UP);
  }
  // TODO(crbug.com/1030324) We should call OnEnabledStateChanged, as for other
  // Devices, so that VirtualDevices can have enabled() == true.
  if (error)
    error->Reset();  // indicate immediate completion
}

void VirtualDevice::Stop(Error* error,
                         const EnabledStateChangedCallback& /*callback*/) {
  // TODO(crbug.com/1030324) We should call OnEnabledStateChanged, as for other
  // Devices.
  if (error)
    error->Reset();  // indicate immediate completion
}

void VirtualDevice::UpdateIPConfig(const IPConfig::Properties& properties) {
  SLOG(this, 2) << __func__ << " on " << link_name();
  if (!ipconfig()) {
    set_ipconfig(std::make_unique<IPConfig>(control_interface(), link_name()));
  }
  ipconfig()->set_properties(properties);
  OnIPv4ConfigUpdated();
}

void VirtualDevice::DropConnection() {
  Device::DropConnection();
}

void VirtualDevice::SelectService(const ServiceRefPtr& service) {
  Device::SelectService(service);
}

void VirtualDevice::SetServiceState(Service::ConnectState state) {
  Device::SetServiceState(state);
}

void VirtualDevice::SetServiceFailure(Service::ConnectFailure failure_state) {
  Device::SetServiceFailure(failure_state);
}

void VirtualDevice::SetServiceFailureSilent(
    Service::ConnectFailure failure_state) {
  Device::SetServiceFailureSilent(failure_state);
}

}  // namespace shill