text: // 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/ethernet/ethernet_service.h"
  
  #include <netinet/ether.h>
  #include <linux/if.h>  // NOLINT - Needs definitions from netinet/ether.h
  #include <stdio.h>
  #include <time.h>
  
  #include <string>
  
  #include <base/strings/string_number_conversions.h>
  #include <base/strings/stringprintf.h>
  #include <chromeos/dbus/service_constants.h>
  
  #include "shill/control_interface.h"
  #include "shill/device.h"
  #include "shill/device_info.h"
  #include "shill/ethernet/ethernet.h"
  #include "shill/ethernet/ethernet_provider.h"
  #include "shill/manager.h"
  #include "shill/profile.h"
  #include "shill/store_interface.h"
  
  using std::string;
  
  namespace shill {
  
  namespace {
  
  constexpr char kAutoConnNoCarrier[] = "no carrier";
  
  }  // namespace
  
  constexpr char EthernetService::kDefaultEthernetDeviceIdentifier[];
  
  EthernetService::EthernetService(Manager* manager, const Properties& props)
      : EthernetService(manager, Technology::kEthernet, props) {
    SetUp();
  }
  
  EthernetService::EthernetService(Manager* manager,
                                   Technology technology,
                                   const Properties& props)
      : Service(manager, technology), props_(props) {}
  
  EthernetService::~EthernetService() {}
  
  void EthernetService::SetUp() {
    set_log_name("ethernet_" + base::NumberToString(serial_number()));
    SetConnectable(true);
    SetAutoConnect(true);
    set_friendly_name("Ethernet");
    SetStrength(kStrengthMax);
  
    // Now that |this| is a fully constructed EthernetService, synchronize
    // observers with our current state, and emit the appropriate change
    // notifications. (Initial observer state may have been set in our base
    // class.)
    NotifyIfVisibilityChanged();
  }
  
  void EthernetService::OnConnect(Error* /*error*/) {
    if (props_.ethernet_) {
      props_.ethernet_->ConnectTo(this);
    }
  }
  
  void EthernetService::OnDisconnect(Error* /*error*/, const char* /*reason*/) {
    if (props_.ethernet_) {
      props_.ethernet_->DisconnectFrom(this);
    }
  }
  
  RpcIdentifier EthernetService::GetDeviceRpcId(Error* error) const {
    if (!props_.ethernet_) {
      error->Populate(Error::kNotFound, "Not associated with a device");
      return control_interface()->NullRpcIdentifier();
    }
    return props_.ethernet_->GetRpcIdentifier();
  }
  
  string EthernetService::GetStorageIdentifier() const {
    if (!props_.ethernet_ || !props_.storage_id_.empty()) {
      return props_.storage_id_;
    }
  
    const std::string* mac_address = &props_.ethernet_->permanent_mac_address();
    if (mac_address->empty()) {
      mac_address = &props_.ethernet_->mac_address();
    }
    return base::StringPrintf("%s_%s", technology().GetName().c_str(),
                              mac_address->c_str());
  }
  
  bool EthernetService::IsAutoConnectByDefault() const {
    return true;
  }
  
  bool EthernetService::SetAutoConnectFull(const bool& connect, Error* error) {
    if (!connect) {
      Error::PopulateAndLog(
          FROM_HERE, error, Error::kInvalidArguments,
          "Auto-connect on Ethernet services must not be disabled.");
      return false;
    }
    return Service::SetAutoConnectFull(connect, error);
  }
  
  void EthernetService::Remove(Error* error) {
    error->Populate(Error::kNotSupported);
  }
  
  bool EthernetService::IsVisible() const {
    return props_.ethernet_ && props_.ethernet_->link_up();
  }
  
  bool EthernetService::IsAutoConnectable(const char** reason) const {
    if (!Service::IsAutoConnectable(reason)) {
      return false;
    }
    if (!props_.ethernet_ || !props_.ethernet_->link_up()) {
      *reason = kAutoConnNoCarrier;
      return false;
    }
    return true;
  }
  
  void EthernetService::OnVisibilityChanged() {
    NotifyIfVisibilityChanged();
  }
  
  string EthernetService::GetTethering(Error* /*error*/) const {
    return props_.ethernet_ && props_.ethernet_->IsConnectedViaTether()
               ? kTetheringConfirmedState
               : kTetheringNotDetectedState;
  }
  
  }  // namespace shill
  