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// 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/device.h"
#include <errno.h>
#include <netinet/in.h>
#include <linux/if.h> // NOLINT - Needs definitions from netinet/in.h
#include <stdio.h>
#include <string.h>
#include <sys/param.h>
#include <time.h>
#include <unistd.h>
#include <algorithm>
#include <optional>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include <base/bind.h>
#include <base/check.h>
#include <base/check_op.h>
#include <base/containers/contains.h>
#include <base/files/file_util.h>
#include <base/logging.h>
#include <base/memory/ref_counted.h>
#include <base/notreached.h>
#include <base/strings/string_number_conversions.h>
#include <base/strings/string_util.h>
#include <base/strings/stringprintf.h>
#include <base/time/time.h>
#include <chromeos/dbus/service_constants.h>
#include "shill/connection.h"
#include "shill/control_interface.h"
#include "shill/error.h"
#include "shill/event_dispatcher.h"
#include "shill/icmp.h"
#include "shill/logging.h"
#include "shill/manager.h"
#include "shill/metrics.h"
#include "shill/net/ip_address.h"
#include "shill/net/ndisc.h"
#include "shill/net/rtnl_handler.h"
#include "shill/network/dhcp_controller.h"
#include "shill/network/dhcp_provider.h"
#include "shill/refptr_types.h"
#include "shill/routing_table.h"
#include "shill/routing_table_entry.h"
#include "shill/service.h"
#include "shill/store/property_accessor.h"
#include "shill/store/store_interface.h"
#include "shill/technology.h"
#include "shill/tethering.h"
namespace shill {
namespace Logging {
static auto kModuleLogScope = ScopeLogger::kDevice;
static std::string ObjectID(const Device* d) {
return d->GetRpcIdentifier().value();
}
} // namespace Logging
namespace {
constexpr char kIPFlagTemplate[] = "/proc/sys/net/%s/conf/%s/%s";
constexpr char kIPFlagVersion4[] = "ipv4";
constexpr char kIPFlagVersion6[] = "ipv6";
constexpr char kIPFlagUseTempAddr[] = "use_tempaddr";
constexpr char kIPFlagUseTempAddrUsedAndDefault[] = "2";
constexpr char kIPFlagAcceptRouterAdvertisementsAlways[] = "2";
constexpr char kIPFlagAcceptDuplicateAddressDetectionEnabled[] = "1";
constexpr char kIPFlagArpAnnounce[] = "arp_announce";
constexpr char kIPFlagArpAnnounceDefault[] = "0";
constexpr char kIPFlagArpAnnounceBestLocal[] = "2";
constexpr char kIPFlagArpIgnore[] = "arp_ignore";
constexpr char kIPFlagArpIgnoreDefault[] = "0";
constexpr char kIPFlagArpIgnoreLocalOnly[] = "1";
constexpr size_t kHardwareAddressLength = 6;
} // namespace
const char Device::kIPFlagDisableIPv6[] = "disable_ipv6";
const char Device::kIPFlagAcceptRouterAdvertisements[] = "accept_ra";
const char Device::kIPFlagAcceptDuplicateAddressDetection[] = "accept_dad";
const char Device::kStoragePowered[] = "Powered";
Device::Device(Manager* manager,
const std::string& link_name,
const std::string& mac_address,
int interface_index,
Technology technology)
: enabled_(false),
enabled_persistent_(true),
enabled_pending_(enabled_),
mac_address_(base::ToLowerASCII(mac_address)),
interface_index_(interface_index),
link_name_(link_name),
manager_(manager),
adaptor_(manager->control_interface()->CreateDeviceAdaptor(this)),
technology_(technology),
dhcp_provider_(DHCPProvider::GetInstance()),
routing_table_(RoutingTable::GetInstance()),
rtnl_handler_(RTNLHandler::GetInstance()),
is_multi_homed_(false),
fixed_ip_params_(false),
traffic_counter_callback_id_(0),
weak_ptr_factory_(this) {
store_.RegisterConstString(kAddressProperty, &mac_address_);
// kBgscanMethodProperty: Registered in WiFi
// kBgscanShortIntervalProperty: Registered in WiFi
// kBgscanSignalThresholdProperty: Registered in WiFi
// kCellularAllowRoamingProperty: Registered in Cellular
// kEsnProperty: Registered in Cellular
// kHomeProviderProperty: Registered in Cellular
// kImeiProperty: Registered in Cellular
// kIccidProperty: Registered in Cellular
// kImsiProperty: Registered in Cellular
// kInhibit: Registered in Cellular
// kManufacturerProperty: Registered in Cellular
// kMdnProperty: Registered in Cellular
// kMeidProperty: Registered in Cellular
// kMinProperty: Registered in Cellular
// kModelIdProperty: Registered in Cellular
// kFirmwareRevisionProperty: Registered in Cellular
// kHardwareRevisionProperty: Registered in Cellular
// kDeviceIdProperty: Registered in Cellular
// kSIMLockStatusProperty: Registered in Cellular
// kFoundNetworksProperty: Registered in Cellular
// kDBusObjectProperty: Register in Cellular
// kUseAttachAPNProperty: Registered in Cellular
store_.RegisterConstString(kInterfaceProperty, &link_name_);
HelpRegisterConstDerivedRpcIdentifier(
kSelectedServiceProperty, &Device::GetSelectedServiceRpcIdentifier);
HelpRegisterConstDerivedRpcIdentifiers(kIPConfigsProperty,
&Device::AvailableIPConfigs);
store_.RegisterConstString(kNameProperty, &link_name_);
store_.RegisterConstBool(kPoweredProperty, &enabled_);
HelpRegisterConstDerivedString(kTypeProperty, &Device::GetTechnologyString);
// kScanningProperty: Registered in WiFi, Cellular
// kScanIntervalProperty: Registered in WiFi, Cellular
// kWakeOnWiFiFeaturesEnabledProperty: Registered in WiFi
SLOG(this, 1) << "Device(): " << link_name_ << " index: " << interface_index_;
}
Device::~Device() {
SLOG(this, 1) << "~Device(): " << link_name_
<< " index: " << interface_index_;
}
void Device::Initialize() {
SLOG(this, 2) << "Initialized";
DisableArpFiltering();
}
void Device::LinkEvent(unsigned flags, unsigned change) {
SLOG(this, 2) << base::StringPrintf("Device %s flags 0x%x changed 0x%x",
link_name_.c_str(), flags, change);
}
void Device::Scan(Error* error, const std::string& reason) {
SLOG(this, 2) << __func__ << " [Device] on " << link_name() << " from "
<< reason;
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotImplemented,
technology().GetName() + " device doesn't implement Scan");
}
void Device::RegisterOnNetwork(const std::string& /*network_id*/,
Error* error,
const ResultCallback& /*callback*/) {
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotImplemented,
technology().GetName() + " device doesn't implement RegisterOnNetwork");
}
void Device::RequirePin(const std::string& /*pin*/,
bool /*require*/,
Error* error,
const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotImplemented,
technology().GetName() + " device doesn't implement RequirePin");
}
void Device::EnterPin(const std::string& /*pin*/,
Error* error,
const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotImplemented,
technology().GetName() + " device doesn't implement EnterPin");
}
void Device::UnblockPin(const std::string& /*unblock_code*/,
const std::string& /*pin*/,
Error* error,
const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotImplemented,
technology().GetName() + " device doesn't implement UnblockPin");
}
void Device::ChangePin(const std::string& /*old_pin*/,
const std::string& /*new_pin*/,
Error* error,
const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotImplemented,
technology().GetName() + " device doesn't implement ChangePin");
}
void Device::Reset(Error* error, const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotImplemented,
technology().GetName() + " device doesn't implement Reset");
}
void Device::StopIPv6() {
SLOG(this, 2) << __func__;
SetIPFlag(IPAddress::kFamilyIPv6, kIPFlagDisableIPv6, "1");
}
void Device::StartIPv6() {
SLOG(this, 2) << __func__;
SetIPFlag(IPAddress::kFamilyIPv6, kIPFlagDisableIPv6, "0");
SetIPFlag(IPAddress::kFamilyIPv6, kIPFlagAcceptDuplicateAddressDetection,
kIPFlagAcceptDuplicateAddressDetectionEnabled);
// Force the kernel to accept RAs even when global IPv6 forwarding is
// enabled. Unfortunately this needs to be set on a per-interface basis.
SetIPFlag(IPAddress::kFamilyIPv6, kIPFlagAcceptRouterAdvertisements,
kIPFlagAcceptRouterAdvertisementsAlways);
}
void Device::EnableIPv6Privacy() {
SetIPFlag(IPAddress::kFamilyIPv6, kIPFlagUseTempAddr,
kIPFlagUseTempAddrUsedAndDefault);
}
void Device::SetIsMultiHomed(bool is_multi_homed) {
if (is_multi_homed == is_multi_homed_) {
return;
}
LOG(INFO) << "Device " << link_name() << " multi-home state is now "
<< is_multi_homed;
is_multi_homed_ = is_multi_homed;
if (is_multi_homed) {
EnableArpFiltering();
} else {
DisableArpFiltering();
}
}
void Device::SetFixedIpParams(bool fixed_ip_params) {
fixed_ip_params_ = fixed_ip_params;
}
void Device::DisableArpFiltering() {
SetIPFlag(IPAddress::kFamilyIPv4, kIPFlagArpAnnounce,
kIPFlagArpAnnounceDefault);
SetIPFlag(IPAddress::kFamilyIPv4, kIPFlagArpIgnore, kIPFlagArpIgnoreDefault);
}
void Device::EnableArpFiltering() {
SetIPFlag(IPAddress::kFamilyIPv4, kIPFlagArpAnnounce,
kIPFlagArpAnnounceBestLocal);
SetIPFlag(IPAddress::kFamilyIPv4, kIPFlagArpIgnore,
kIPFlagArpIgnoreLocalOnly);
}
bool Device::IsConnected() const {
if (selected_service_)
return selected_service_->IsConnected();
return false;
}
bool Device::IsConnectedToService(const ServiceRefPtr& service) const {
return service == selected_service_ && IsConnected();
}
bool Device::IsConnectedViaTether() const {
if (!ipconfig_)
return false;
ByteArray vendor_encapsulated_options =
ipconfig_->properties().vendor_encapsulated_options;
size_t android_vendor_encapsulated_options_len =
strlen(Tethering::kAndroidVendorEncapsulatedOptions);
return (vendor_encapsulated_options.size() ==
android_vendor_encapsulated_options_len) &&
!memcmp(&vendor_encapsulated_options[0],
Tethering::kAndroidVendorEncapsulatedOptions,
vendor_encapsulated_options.size());
}
void Device::OnSelectedServiceChanged(const ServiceRefPtr&) {}
const RpcIdentifier& Device::GetRpcIdentifier() const {
return adaptor_->GetRpcIdentifier();
}
std::string Device::GetStorageIdentifier() const {
return "device_" + mac_address_;
}
std::vector<GeolocationInfo> Device::GetGeolocationObjects() const {
return std::vector<GeolocationInfo>();
}
std::string Device::GetTechnologyString(Error* /*error*/) {
return technology().GetName();
}
const std::string& Device::UniqueName() const {
return link_name_;
}
bool Device::Load(const StoreInterface* storage) {
const auto id = GetStorageIdentifier();
if (!storage->ContainsGroup(id)) {
SLOG(this, 2) << "Device is not available in the persistent store: " << id;
return false;
}
enabled_persistent_ = true;
storage->GetBool(id, kStoragePowered, &enabled_persistent_);
return true;
}
bool Device::Save(StoreInterface* storage) {
const auto id = GetStorageIdentifier();
storage->SetBool(id, kStoragePowered, enabled_persistent_);
return true;
}
void Device::OnBeforeSuspend(const ResultCallback& callback) {
// Nothing to be done in the general case, so immediately report success.
callback.Run(Error(Error::kSuccess));
}
void Device::OnAfterResume() {
RenewDHCPLease(false, nullptr);
}
void Device::OnDarkResume(const ResultCallback& callback) {
// Nothing to be done in the general case, so immediately report success.
callback.Run(Error(Error::kSuccess));
}
void Device::DropConnection() {
SLOG(this, 2) << __func__;
DestroyIPConfig();
SelectService(nullptr);
}
void Device::ResetConnection() {
SLOG(this, 2) << __func__;
DestroyIPConfig();
if (!selected_service_) {
return;
}
// Refresh traffic counters before deselecting the service.
FetchTrafficCounters(selected_service_, /*new_service=*/nullptr);
const ServiceRefPtr old_service = selected_service_;
selected_service_ = nullptr;
OnSelectedServiceChanged(old_service);
adaptor_->EmitRpcIdentifierChanged(kSelectedServiceProperty,
GetSelectedServiceRpcIdentifier(nullptr));
}
void Device::DestroyIPConfig() {
StopIPv6();
bool ipconfig_changed = false;
if (dhcp_controller_) {
dhcp_controller_->ReleaseIP(DHCPController::kReleaseReasonDisconnect);
dhcp_controller_ = nullptr;
}
if (ipconfig_) {
ipconfig_ = nullptr;
ipconfig_changed = true;
}
if (ip6config_) {
StopIPv6DNSServerTimer();
ip6config_ = nullptr;
ipconfig_changed = true;
}
// Emit updated IP configs if there are any changes.
if (ipconfig_changed) {
UpdateIPConfigsProperty();
}
DestroyConnection();
}
void Device::OnIPv6AddressChanged(const IPAddress* address) {
if (!address) {
if (ip6config_) {
ip6config_ = nullptr;
UpdateIPConfigsProperty();
}
return;
}
CHECK_EQ(address->family(), IPAddress::kFamilyIPv6);
IPConfig::Properties properties;
if (!address->IntoString(&properties.address)) {
LOG(ERROR) << "Unable to convert IPv6 address into a string";
return;
}
properties.subnet_prefix = address->prefix();
RoutingTableEntry default_route;
if (routing_table_->GetDefaultRoute(interface_index_, IPAddress::kFamilyIPv6,
&default_route)) {
if (!default_route.gateway.IntoString(&properties.gateway)) {
LOG(ERROR) << "Unable to convert IPv6 gateway into a string";
return;
}
} else {
// The kernel normally populates the default route before it performs
// a neighbor solicitation for the new address, so it shouldn't be
// missing at this point.
LOG(WARNING) << "No default route for global IPv6 address "
<< properties.address;
}
if (!ip6config_) {
ip6config_ = std::make_unique<IPConfig>(control_interface(), link_name_);
} else if (properties.address == ip6config_->properties().address &&
properties.subnet_prefix ==
ip6config_->properties().subnet_prefix) {
SLOG(this, 2) << __func__ << " primary address for " << link_name_
<< " is unchanged";
return;
}
properties.address_family = IPAddress::kFamilyIPv6;
properties.method = kTypeIPv6;
// It is possible for device to receive DNS server notification before IP
// address notification, so preserve the saved DNS server if it exist.
properties.dns_servers = ip6config_->properties().dns_servers;
if (ipv6_static_properties_ &&
!ipv6_static_properties_->dns_servers.empty()) {
properties.dns_servers = ipv6_static_properties_->dns_servers;
}
ip6config_->set_properties(properties);
UpdateIPConfigsProperty();
OnIPv6ConfigUpdated();
OnGetSLAACAddress();
}
void Device::OnIPv6DnsServerAddressesChanged() {
std::vector<IPAddress> server_addresses;
uint32_t lifetime = 0;
// Stop any existing timer.
StopIPv6DNSServerTimer();
if (!manager_->device_info()->GetIPv6DnsServerAddresses(
interface_index_, &server_addresses, &lifetime) ||
lifetime == 0) {
IPv6DNSServerExpired();
return;
}
std::vector<std::string> addresses_str;
for (const auto& ip : server_addresses) {
std::string address_str;
if (!ip.IntoString(&address_str)) {
LOG(ERROR) << "Unable to convert IPv6 address into a string!";
IPv6DNSServerExpired();
return;
}
addresses_str.push_back(address_str);
}
if (!ip6config_) {
ip6config_ = std::make_unique<IPConfig>(control_interface(), link_name_);
}
if (lifetime != ND_OPT_LIFETIME_INFINITY) {
// Setup timer to monitor DNS server lifetime if not infinite lifetime.
base::TimeDelta delay = base::Seconds(lifetime);
StartIPv6DNSServerTimer(delay);
}
// Done if no change in server addresses.
if (ip6config_->properties().dns_servers == addresses_str) {
SLOG(this, 2) << __func__ << " IPv6 DNS server list for " << link_name_
<< " is unchanged.";
return;
}
ip6config_->UpdateDNSServers(std::move(addresses_str));
UpdateIPConfigsProperty();
OnIPv6ConfigUpdated();
}
void Device::StartIPv6DNSServerTimer(base::TimeDelta delay) {
ipv6_dns_server_expired_callback_.Reset(base::Bind(
&Device::IPv6DNSServerExpired, weak_ptr_factory_.GetWeakPtr()));
dispatcher()->PostDelayedTask(
FROM_HERE, ipv6_dns_server_expired_callback_.callback(), delay);
}
void Device::StopIPv6DNSServerTimer() {
ipv6_dns_server_expired_callback_.Cancel();
}
void Device::IPv6DNSServerExpired() {
if (!ip6config_) {
return;
}
ip6config_->UpdateDNSServers(std::vector<std::string>());
UpdateIPConfigsProperty();
}
void Device::StopAllActivities() {
StopPortalDetection();
StopConnectionDiagnostics();
StopIPv6DNSServerTimer();
}
void Device::SetUsbEthernetMacAddressSource(const std::string& source,
Error* error,
const ResultCallback& callback) {
Error::PopulateAndLog(FROM_HERE, error, Error::kNotImplemented,
"SetUsbEthernetMacAddressSource from source " + source +
" is not implemented for " +
technology().GetName() + " device on " +
link_name_ + ".");
return;
}
void Device::RenewDHCPLease(bool from_dbus, Error* /*error*/) {
LOG(INFO) << __func__;
if (dhcp_controller_) {
SLOG(this, 3) << "Renewing IPv4 Address";
dhcp_controller_->RenewIP();
}
if (ip6config_ && !from_dbus) {
SLOG(this, 3) << "Waiting for new IPv6 configuration";
// Invalidate the old IPv6 configuration, will receive notifications
// from kernel for new IPv6 configuration if there is one.
StopIPv6DNSServerTimer();
ip6config_ = nullptr;
UpdateIPConfigsProperty();
}
}
bool Device::ShouldUseArpGateway() const {
return false;
}
bool Device::IsUsingStaticIP() const {
if (!selected_service_) {
return false;
}
return selected_service_->HasStaticIPAddress();
}
bool Device::IsUsingStaticNameServers() const {
if (!selected_service_) {
return false;
}
return selected_service_->HasStaticNameServers();
}
bool Device::AcquireIPConfig() {
return AcquireIPConfigWithLeaseName(std::string());
}
bool Device::AcquireIPConfigWithLeaseName(const std::string& lease_name) {
DestroyIPConfig();
StartIPv6();
bool arp_gateway = manager_->GetArpGateway() && ShouldUseArpGateway();
dhcp_controller_ =
dhcp_provider_->CreateController(link_name_, lease_name, arp_gateway,
manager_->dhcp_hostname(), technology_);
const int minimum_mtu = manager()->GetMinimumMTU();
if (minimum_mtu != IPConfig::kUndefinedMTU) {
dhcp_controller_->set_minimum_mtu(minimum_mtu);
}
dhcp_controller_->RegisterCallbacks(
base::BindRepeating(&Device::OnIPConfigUpdatedFromDHCP, AsWeakPtr()),
base::BindRepeating(&Device::OnDHCPFailure, AsWeakPtr()));
ipconfig_ = std::make_unique<IPConfig>(control_interface(), link_name_,
IPConfig::kTypeDHCP);
dispatcher()->PostTask(
FROM_HERE, base::BindOnce(&Device::ConfigureStaticIPTask, AsWeakPtr()));
return dhcp_controller_->RequestIP();
}
void Device::UpdateBlackholeUserTraffic() {
SLOG(this, 2) << __func__;
if (ipconfig_) {
bool updated;
if (manager_->ShouldBlackholeUserTraffic(UniqueName())) {
updated = ipconfig_->SetBlackholedUids(manager_->GetUserTrafficUids());
} else {
updated = ipconfig_->ClearBlackholedUids();
}
if (updated) {
SetupConnection(ipconfig_.get());
}
}
}
void Device::FetchTrafficCounters(const ServiceRefPtr& old_service,
const ServiceRefPtr& new_service) {
std::set<std::string> devices{link_name_};
patchpanel::Client* client = manager_->patchpanel_client();
if (!client) {
return;
}
traffic_counter_callback_id_++;
traffic_counters_callback_map_[traffic_counter_callback_id_] =
base::BindOnce(&Device::GetTrafficCountersCallback, AsWeakPtr(),
old_service, new_service);
client->GetTrafficCounters(
devices, base::BindOnce(&Device::GetTrafficCountersPatchpanelCallback,
AsWeakPtr(), traffic_counter_callback_id_));
}
void Device::OnNeighborReachabilityEvent(
const IPAddress& ip_address,
patchpanel::NeighborReachabilityEventSignal::Role role,
patchpanel::NeighborReachabilityEventSignal::EventType event_type) {
// Does nothing in the general case.
}
void Device::AssignIPConfig(const IPConfig::Properties& properties) {
DestroyIPConfig();
StartIPv6();
ipconfig_ = std::make_unique<IPConfig>(control_interface(), link_name_);
ipconfig_->set_properties(properties);
dispatcher()->PostTask(
FROM_HERE, base::BindOnce(&Device::OnIPv4ConfigUpdated, AsWeakPtr()));
}
void Device::AssignStaticIPv6Config(const IPConfig::Properties& properties) {
StartIPv6();
ipv6_static_properties_ = properties;
dispatcher()->PostTask(
FROM_HERE,
base::BindOnce(&Device::ConfigureStaticIPv6Address, AsWeakPtr()));
// UpdateIPConfigsProperty() will be called later when SLAAC finishes, that
// is also where static DNS configuration will be applied.
}
void Device::DestroyIPConfigLease(const std::string& name) {
dhcp_provider_->DestroyLease(name);
}
void Device::HelpRegisterConstDerivedString(
const std::string& name, std::string (Device::*get)(Error* error)) {
store_.RegisterDerivedString(
name, StringAccessor(
new CustomAccessor<Device, std::string>(this, get, nullptr)));
}
void Device::HelpRegisterConstDerivedRpcIdentifier(
const std::string& name, RpcIdentifier (Device::*get)(Error* error)) {
store_.RegisterDerivedRpcIdentifier(
name, RpcIdentifierAccessor(
new CustomAccessor<Device, RpcIdentifier>(this, get, nullptr)));
}
void Device::HelpRegisterConstDerivedRpcIdentifiers(
const std::string& name, RpcIdentifiers (Device::*get)(Error*)) {
store_.RegisterDerivedRpcIdentifiers(
name, RpcIdentifiersAccessor(new CustomAccessor<Device, RpcIdentifiers>(
this, get, nullptr)));
}
void Device::HelpRegisterConstDerivedUint64(const std::string& name,
uint64_t (Device::*get)(Error*)) {
store_.RegisterDerivedUint64(
name,
Uint64Accessor(new CustomAccessor<Device, uint64_t>(this, get, nullptr)));
}
void Device::ConfigureStaticIPTask() {
SLOG(this, 2) << __func__ << " selected_service " << selected_service_.get()
<< " ipconfig " << ipconfig_.get();
if (!selected_service_ || !ipconfig_) {
return;
}
if (IsUsingStaticIP()) {
SLOG(this, 2) << __func__ << " "
<< " configuring static IP parameters.";
// If the parameters contain an IP address, apply them now and bring
// the interface up. When DHCP information arrives, it will supplement
// the static information.
OnIPv4ConfigUpdated();
} else {
// Either |ipconfig_| has just been created in AcquireIPConfig() or
// we're being called by OnIPConfigRefreshed(). In either case a
// DHCP client has been started, and will take care of calling
// OnIPv4ConfigUpdated() when it completes.
SLOG(this, 2) << __func__ << " "
<< " no static IP address.";
}
}
void Device::OnIPv6ConfigUpdated() {
if (!ip6config_) {
LOG(WARNING) << __func__ << " called but |ip6config_| is empty";
return;
}
if (connection_) {
connection_->UpdateGatewayMetric(ip6config_->properties());
}
// Setup connection using IPv6 configuration only if the IPv6 configuration
// is ready for connection (contained both IP address and DNS servers), and
// there is no existing IPv4 connection. We always prefer IPv4
// configuration over IPv6.
if (ip6config_->properties().HasIPAddressAndDNS() &&
(!connection_ || connection_->IsIPv6())) {
SetupConnection(ip6config_.get());
}
}
void Device::ConfigureStaticIPv6Address() {
if (!ipv6_static_properties_ || ipv6_static_properties_->address.empty()) {
return;
}
IPAddress local(IPAddress::kFamilyIPv6);
if (!local.SetAddressFromString(ipv6_static_properties_->address)) {
LOG(ERROR) << "Local address " << ipv6_static_properties_->address
<< " is invalid";
return;
}
local.set_prefix(ipv6_static_properties_->subnet_prefix);
rtnl_handler_->AddInterfaceAddress(interface_index_, local,
local.GetDefaultBroadcast(),
IPAddress(IPAddress::kFamilyIPv6));
}
void Device::SetupConnection(IPConfig* ipconfig) {
DCHECK(ipconfig);
CreateConnection();
if (manager_->ShouldBlackholeUserTraffic(UniqueName())) {
ipconfig->SetBlackholedUids(manager_->GetUserTrafficUids());
} else {
ipconfig->ClearBlackholedUids();
}
connection_->UpdateFromIPConfig(ipconfig->properties());
ConfigureStaticIPv6Address();
// Report connection type.
Metrics::NetworkConnectionIPType ip_type =
connection_->IsIPv6() ? Metrics::kNetworkConnectionIPTypeIPv6
: Metrics::kNetworkConnectionIPTypeIPv4;
metrics()->NotifyNetworkConnectionIPType(technology_, ip_type);
// Report if device have IPv6 connectivity
bool ipv6_connectivity =
ip6config_ && ip6config_->properties().HasIPAddressAndDNS();
metrics()->NotifyIPv6ConnectivityStatus(technology_, ipv6_connectivity);
if (selected_service_) {
selected_service_->SetIPConfig(
ipconfig->GetRpcIdentifier(),
base::BindRepeating(&Device::OnStaticIPConfigChanged,
weak_ptr_factory_.GetWeakPtr()));
// If the service is already in a Connected state (this happens during a
// roam or DHCP renewal), transitioning back to Connected isn't productive.
// Avoid this transition entirely and wait for portal detection to
// transition us to a more informative state (either Online or some
// portalled state). Instead, set RoamState so that clients that care about
// the Service's state are still able to track it.
if (!selected_service_->IsConnected()) {
// Setting Service.State to Connected resets RoamState.
SetServiceState(Service::kStateConnected);
} else {
// We set RoamState here to reflect the actual state of the Service during
// a roam. This way, we can keep Service.State at Online or a portalled
// state to preserve the service sort order. Note that this can be
// triggered by a DHCP renewal that's not a result of a roam as well, but
// it won't do anything in non-WiFi Services.
selected_service_->SetRoamState(Service::kRoamStateConnected);
}
OnConnected();
// Subtle: Start portal detection after transitioning the service
// to the Connected state because this call may immediately transition
// to the Online state.
StartPortalDetection();
}
}
void Device::OnIPConfigUpdatedFromDHCP(const IPConfig::Properties& properties,
bool new_lease_acquired) {
// |dhcp_controller_| cannot be empty when the callback is invoked.
DCHECK(dhcp_controller_);
DCHECK(ipconfig_);
ipconfig_->UpdateProperties(properties);
OnIPv4ConfigUpdated();
if (new_lease_acquired) {
OnGetDHCPLease();
}
}
void Device::OnGetDHCPLease() {}
void Device::OnGetSLAACAddress() {}
void Device::OnIPv4ConfigUpdated() {
SLOG(this, 2) << __func__;
if (selected_service_) {
ipconfig_->ApplyStaticIPParameters(
selected_service_->mutable_static_ip_parameters());
if (IsUsingStaticIP() && dhcp_controller_) {
// If we are using a statically configured IP address instead
// of a leased IP address, release any acquired lease so it may
// be used by others. This allows us to merge other non-leased
// parameters (like DNS) when they're available from a DHCP server
// and not overridden by static parameters, but at the same time
// we avoid taking up a dynamic IP address the DHCP server could
// assign to someone else who might actually use it.
dhcp_controller_->ReleaseIP(DHCPController::kReleaseReasonStaticIP);
}
}
SetupConnection(ipconfig_.get());
UpdateIPConfigsProperty();
}
void Device::OnDHCPFailure() {
SLOG(this, 2) << __func__;
// |dhcp_controller_| cannot be empty when the callback is invoked.
DCHECK(dhcp_controller_);
DCHECK(ipconfig_);
if (selected_service_) {
if (IsUsingStaticIP()) {
// Consider three cases:
//
// 1. We're here because DHCP failed while starting up. There
// are two subcases:
// a. DHCP has failed, and Static IP config has _not yet_
// completed. It's fine to do nothing, because we'll
// apply the static config shortly.
// b. DHCP has failed, and Static IP config has _already_
// completed. It's fine to do nothing, because we can
// continue to use the static config that's already
// been applied.
//
// 2. We're here because a previously valid DHCP configuration
// is no longer valid. There's still a static IP config,
// because the condition in the if clause evaluated to true.
// Furthermore, the static config includes an IP address for
// us to use.
//
// The current configuration may include some DHCP
// parameters, overriden by any static parameters
// provided. We continue to use this configuration, because
// the only configuration element that is leased to us (IP
// address) will be overriden by a static parameter.
return;
}
}
ipconfig_->ResetProperties();
UpdateIPConfigsProperty();
// Fallback to IPv6 if possible.
if (ip6config_ && ip6config_->properties().HasIPAddressAndDNS()) {
if (!connection_ || !connection_->IsIPv6()) {
// Setup IPv6 connection.
SetupConnection(ip6config_.get());
} else {
// Ignore IPv4 config failure, since IPv6 is up.
}
return;
}
OnIPConfigFailure();
DestroyConnection();
}
void Device::OnStaticIPConfigChanged() {
if (!ipconfig_ || !selected_service_) {
LOG(ERROR) << __func__ << " called but "
<< (!ipconfig_ ? "no IPv4 config" : "no selected service");
return;
}
// Clear the previously applied static IP parameters.
ipconfig_->RestoreSavedIPParameters(
selected_service_->mutable_static_ip_parameters());
dispatcher()->PostTask(
FROM_HERE, base::BindOnce(&Device::ConfigureStaticIPTask, AsWeakPtr()));
if (dhcp_controller_) {
// Trigger DHCP renew.
dhcp_controller_->RenewIP();
}
}
void Device::OnIPConfigFailure() {
if (selected_service_) {
Error error;
selected_service_->DisconnectWithFailure(Service::kFailureDHCP, &error,
__func__);
}
}
void Device::OnConnected() {}
void Device::CreateConnection() {
SLOG(this, 2) << __func__;
if (!connection_) {
connection_ = std::make_unique<Connection>(interface_index_, link_name_,
fixed_ip_params_, technology_,
manager_->device_info());
}
}
void Device::DestroyConnection() {
SLOG(this, 2) << __func__ << " on " << link_name_;
StopAllActivities();
if (selected_service_) {
selected_service_->SetIPConfig(RpcIdentifier(),
/*static_ipconfig_changed_callback=*/{});
}
connection_ = nullptr;
}
void Device::GetTrafficCountersCallback(
const ServiceRefPtr& old_service,
const ServiceRefPtr& new_service,
const std::vector<patchpanel::TrafficCounter>& counters) {
if (old_service) {
old_service->RefreshTrafficCounters(counters);
}
if (new_service) {
// Update the snapshot values, which will be used in future refreshes to
// diff against the counter values. Snapshot must be initialized before
// layer 3 configuration to ensure that we capture all traffic for the
// service.
new_service->InitializeTrafficCounterSnapshot(counters);
}
}
void Device::GetTrafficCountersPatchpanelCallback(
unsigned int id, const std::vector<patchpanel::TrafficCounter>& counters) {
auto iter = traffic_counters_callback_map_.find(id);
if (iter == traffic_counters_callback_map_.end() || iter->second.is_null()) {
LOG(ERROR) << "No callback found for ID " << id;
return;
}
if (counters.empty()) {
LOG(WARNING) << "No counters found for " << link_name_;
}
auto callback = std::move(iter->second);
traffic_counters_callback_map_.erase(iter);
std::move(callback).Run(counters);
}
void Device::SelectService(const ServiceRefPtr& service) {
SLOG(this, 2) << __func__ << ": service "
<< (service ? service->log_name() : "*reset*") << " on "
<< link_name_;
if (selected_service_.get() == service.get()) {
// No change to |selected_service_|. Return early to avoid
// changing its state.
return;
}
ServiceRefPtr old_service;
if (selected_service_) {
old_service = selected_service_;
if (selected_service_->state() != Service::kStateFailure) {
selected_service_->SetState(Service::kStateIdle);
}
selected_service_->SetIPConfig(RpcIdentifier(),
/*static_ipconfig_changed_callback=*/{});
StopAllActivities();
}
selected_service_ = service;
OnSelectedServiceChanged(old_service);
FetchTrafficCounters(old_service, selected_service_);
adaptor_->EmitRpcIdentifierChanged(kSelectedServiceProperty,
GetSelectedServiceRpcIdentifier(nullptr));
}
void Device::SetServiceState(Service::ConnectState state) {
if (selected_service_) {
selected_service_->SetState(state);
}
}
void Device::SetServiceFailure(Service::ConnectFailure failure_state) {
if (selected_service_) {
selected_service_->SetFailure(failure_state);
}
}
void Device::SetServiceFailureSilent(Service::ConnectFailure failure_state) {
if (selected_service_) {
selected_service_->SetFailureSilent(failure_state);
}
}
bool Device::SetIPFlag(IPAddress::Family family,
const std::string& flag,
const std::string& value) {
std::string ip_version;
if (family == IPAddress::kFamilyIPv4) {
ip_version = kIPFlagVersion4;
} else if (family == IPAddress::kFamilyIPv6) {
ip_version = kIPFlagVersion6;
} else {
NOTIMPLEMENTED();
}
base::FilePath flag_file(base::StringPrintf(
kIPFlagTemplate, ip_version.c_str(), link_name_.c_str(), flag.c_str()));
SLOG(this, 2) << "Writing " << value << " to flag file " << flag_file.value();
if (base::WriteFile(flag_file, value.c_str(), value.length()) != 1) {
const auto message =
base::StringPrintf("IP flag write failed: %s to %s", value.c_str(),
flag_file.value().c_str());
if (!base::PathExists(flag_file) &&
base::Contains(written_flags_, flag_file.value())) {
SLOG(this, 2) << message << " (device is no longer present?)";
} else {
LOG(ERROR) << message;
}
return false;
} else {
written_flags_.insert(flag_file.value());
}
return true;
}
bool Device::RestartPortalDetection() {
StopPortalDetection();
return StartPortalDetection();
}
bool Device::RequestPortalDetection() {
if (!selected_service_) {
LOG(INFO) << link_name() << ": Skipping portal detection: no Service";
return false;
}
if (!connection_) {
LOG(INFO) << link_name() << ": Skipping portal detection: no Connection";
return false;
}
// Do not run portal detection unless in a connected state (i.e. connected,
// online, or portalled).
if (!selected_service_->IsConnected()) {
LOG(INFO) << link_name()
<< ": Skipping portal detection: Service is not connected";
return false;
}
if (portal_detector_.get() && portal_detector_->IsInProgress()) {
LOG(INFO) << link_name() << ": Portal detection is already running.";
return true;
}
SLOG(this, 1) << __func__ << " for: " << selected_service_->log_name();
return StartPortalDetection();
}
// Start portal detection for |selected_service_| if enabled.
// Note: This method used to also check for a proxy configuration, however a
// proxy may or may not return a portal response depending on how it is
// configured. We run additional portal detection in Chrome if a proxy is
// configured, but still run Shill portal detection first.
bool Device::StartPortalDetection() {
DCHECK(selected_service_);
SLOG(this, 1) << __func__ << " for: " << selected_service_->log_name();
if (selected_service_->IsPortalDetectionDisabled()) {
LOG(INFO) << link_name() << ": Portal detection is disabled for service "
<< selected_service_->log_name();
SetServiceConnectedState(Service::kStateOnline);
return false;
}
// If portal detection is disabled for this technology, immediately set
// the service state to "Online".
if (selected_service_->IsPortalDetectionAuto() &&
!manager_->IsPortalDetectionEnabled(technology())) {
LOG(INFO) << link_name()
<< ": Portal detection is disabled for this technology";
SetServiceConnectedState(Service::kStateOnline);
return false;
}
if (selected_service_->HasProxyConfig()) {
// Services with HTTP proxy configurations should not be checked by the
// connection manager, since we don't have the ability to evaluate
// arbitrary proxy configs and their possible credentials.
// TODO(b/207657239) Make PortalDetector proxy-aware and compatible with
// web proxy configurations.
LOG(INFO) << link_name() << ": Service " << selected_service_->log_name()
<< " has proxy config; marking it online.";
SetServiceConnectedState(Service::kStateOnline);
return false;
}
portal_detector_.reset(new PortalDetector(
dispatcher(), metrics(),
base::Bind(&Device::PortalDetectorCallback, AsWeakPtr())));
if (!portal_detector_->Start(
manager_->GetProperties(), connection_->interface_name(),
connection_->local(), connection_->dns_servers())) {
LOG(ERROR) << link_name() << ": Portal detection failed to start";
SetServiceConnectedState(Service::kStateOnline);
return false;
}
SLOG(this, 2) << link_name() << ": Portal detection has started.";
return true;
}
void Device::StopPortalDetection() {
SLOG(this, 2) << link_name() << ": Portal detection stopping.";
portal_detector_.reset();
}
void Device::StartConnectionDiagnosticsAfterPortalDetection() {
connection_diagnostics_.reset(new ConnectionDiagnostics(
connection_->interface_name(), connection_->interface_index(),
connection_->local(), connection_->gateway(), connection_->dns_servers(),
dispatcher(), metrics(), manager_->device_info(), base::DoNothing()));
if (!connection_diagnostics_->Start(
manager_->GetProperties().portal_http_url)) {
connection_diagnostics_.reset();
}
}
void Device::StopConnectionDiagnostics() {
SLOG(this, 2) << link_name() << ": Connection diagnostics stopping.";
connection_diagnostics_.reset();
}
void Device::EmitMACAddress(const std::string& mac_address) {
if (mac_address.empty() ||
MakeHardwareAddressFromString(mac_address).empty()) {
adaptor_->EmitStringChanged(kAddressProperty, mac_address_);
} else {
adaptor_->EmitStringChanged(kAddressProperty, mac_address);
}
}
void Device::set_mac_address(const std::string& mac_address) {
mac_address_ = mac_address;
EmitMACAddress();
}
std::optional<base::TimeDelta> Device::TimeToNextDHCPLeaseRenewal() {
if (!dhcp_controller()) {
return std::nullopt;
}
return dhcp_controller()->TimeToLeaseExpiry();
}
void Device::SetServiceConnectedState(Service::ConnectState state) {
DCHECK(selected_service_.get());
if (!selected_service_) {
// A race can happen if the Service has disconnected in the meantime.
LOG(WARNING)
<< link_name() << ": "
<< "Portal detection completed but no selected service exists.";
return;
}
if (!selected_service_->IsConnected()) {
// A race can happen if the Service is currently disconnecting.
LOG(WARNING) << link_name() << ": "
<< "Portal detection completed but selected service "
<< selected_service_->log_name()
<< " is in non-connected state.";
return;
}
SLOG(this, 2) << __func__ << " Service: " << selected_service_->log_name()
<< " State: " << Service::ConnectStateToString(state);
if (Service::IsPortalledState(state)) {
CHECK(portal_detector_.get());
const auto next_delay = portal_detector_->GetNextAttemptDelay();
if (!portal_detector_->Start(
manager_->GetProperties(), connection_->interface_name(),
connection_->local(), connection_->dns_servers(), next_delay)) {
LOG(ERROR) << link_name() << ": Portal detection failed to restart";
SetServiceState(Service::kStateOnline);
StopPortalDetection();
return;
}
LOG(INFO) << link_name() << ": Portal detection retrying in " << next_delay;
} else {
LOG(INFO) << link_name() << ": Portal detection finished";
StopPortalDetection();
}
SetServiceState(state);
}
void Device::PortalDetectorCallback(const PortalDetector::Result& result) {
SLOG(this, 2) << __func__ << " Device: " << link_name() << " Service: "
<< GetSelectedServiceRpcIdentifier(nullptr).value()
<< " Received status: " << result.http_status;
int portal_status = Metrics::PortalDetectionResultToEnum(result);
metrics()->SendEnumToUMA(
metrics()->GetFullMetricName(Metrics::kMetricPortalResultSuffix,
technology()),
portal_status, Metrics::kPortalResultMax);
Service::ConnectState state = result.GetConnectionState();
if (selected_service_) {
// Set the probe URL. It should be empty if there is no redirect.
selected_service_->SetProbeUrl(result.probe_url_string);
}
if (state == Service::kStateOnline) {
SetServiceConnectedState(state);
metrics()->SendToUMA(
metrics()->GetFullMetricName(
Metrics::kMetricPortalAttemptsToOnlineSuffix, technology()),
result.num_attempts, Metrics::kMetricPortalAttemptsToOnlineMin,
Metrics::kMetricPortalAttemptsToOnlineMax,
Metrics::kMetricPortalAttemptsToOnlineNumBuckets);
} else {
// Set failure phase and status.
if (selected_service_) {
selected_service_->SetPortalDetectionFailure(
PortalDetector::PhaseToString(result.http_phase),
PortalDetector::StatusToString(result.http_status),
result.http_status_code);
}
SetServiceConnectedState(state);
// If portal detection was not conclusive, also start additional connection
// diagnostics for the current network connection.
if (state == Service::kStateNoConnectivity ||
state == Service::kStatePortalSuspected) {
StartConnectionDiagnosticsAfterPortalDetection();
}
}
}
RpcIdentifier Device::GetSelectedServiceRpcIdentifier(Error* /*error*/) {
if (!selected_service_) {
return RpcIdentifier("/");
}
return selected_service_->GetRpcIdentifier();
}
RpcIdentifiers Device::AvailableIPConfigs(Error* /*error*/) {
RpcIdentifiers identifiers;
if (ipconfig_) {
identifiers.push_back(ipconfig_->GetRpcIdentifier());
}
if (ip6config_) {
identifiers.push_back(ip6config_->GetRpcIdentifier());
}
return identifiers;
}
bool Device::IsUnderlyingDeviceEnabled() const {
return false;
}
// callback
void Device::OnEnabledStateChanged(const ResultCallback& callback,
const Error& error) {
SLOG(this, 1) << __func__ << " (target: " << enabled_pending_ << ","
<< " success: " << error.IsSuccess() << ")"
<< " on " << link_name_;
if (error.IsSuccess()) {
UpdateEnabledState();
} else {
// Set enabled_pending_ to |enabled_| so that we don't try enabling again
// after an error.
enabled_pending_ = enabled_;
}
if (!callback.is_null())
callback.Run(error);
}
void Device::UpdateEnabledState() {
SLOG(this, 1) << __func__ << " (current: " << enabled_
<< ", target: " << enabled_pending_ << ")"
<< " on " << link_name_;
enabled_ = enabled_pending_;
if (!enabled_ && ShouldBringNetworkInterfaceDownAfterDisabled()) {
BringNetworkInterfaceDown();
}
manager_->UpdateEnabledTechnologies();
adaptor_->EmitBoolChanged(kPoweredProperty, enabled_);
}
void Device::SetEnabled(bool enable) {
SLOG(this, 1) << __func__ << "(" << enable << ")";
Error error;
SetEnabledChecked(enable, false, &error, ResultCallback());
// SetEnabledInternal might fail here if there is an unfinished enable or
// disable operation. Don't log error in this case, as this method is only
// called when the underlying device is already in the target state and the
// pending operation should eventually bring the device to the expected
// state.
LOG_IF(ERROR, error.IsFailure() && !error.IsOngoing() &&
error.type() != Error::kInProgress)
<< "Enabled failed, but no way to report the failure.";
}
void Device::SetEnabledNonPersistent(bool enable,
Error* error,
const ResultCallback& callback) {
SLOG(this, 1) << __func__ << "(" << enable << ")";
SetEnabledChecked(enable, false, error, callback);
}
void Device::SetEnabledPersistent(bool enable,
Error* error,
const ResultCallback& callback) {
SLOG(this, 1) << __func__ << "(" << enable << ")";
SetEnabledChecked(enable, true, error, callback);
}
void Device::SetEnabledChecked(bool enable,
bool persist,
Error* error,
const ResultCallback& callback) {
DCHECK(error);
SLOG(this, 1) << __func__ << ": Device " << link_name_ << " "
<< (enable ? "starting" : "stopping");
if (enable && manager_->IsTechnologyProhibited(technology())) {
error->Populate(Error::kPermissionDenied, "The " + technology().GetName() +
" technology is prohibited");
return;
}
if (enable == enabled_) {
if (enable != enabled_pending_ && persist) {
// Return an error, as there is an ongoing operation to achieve the
// opposite.
Error::PopulateAndLog(
FROM_HERE, error, Error::kOperationFailed,
enable ? "Cannot enable while the device is disabling."
: "Cannot disable while the device is enabling.");
return;
}
SLOG(this, 1) << "Already in desired enable state.";
error->Reset();
// We can already be in the right state, but it may not be persisted.
// Check and flush that too.
if (persist && enabled_persistent_ != enable) {
enabled_persistent_ = enable;
manager_->UpdateDevice(this);
}
return;
}
if (enabled_pending_ == enable) {
Error::PopulateAndLog(FROM_HERE, error, Error::kInProgress,
"Enable operation already in progress");
return;
}
if (persist) {
enabled_persistent_ = enable;
manager_->UpdateDevice(this);
}
SetEnabledUnchecked(enable, error, callback);
}
void Device::SetEnabledUnchecked(bool enable,
Error* error,
const ResultCallback& on_enable_complete) {
SLOG(this, 1) << __func__ << ": link: " << link_name()
<< " enable: " << enable;
enabled_pending_ = enable;
EnabledStateChangedCallback chained_callback = base::Bind(
&Device::OnEnabledStateChanged, AsWeakPtr(), on_enable_complete);
if (enable) {
Start(error, chained_callback);
} else {
DestroyIPConfig(); // breaks a reference cycle
SelectService(nullptr); // breaks a reference cycle
if (!ShouldBringNetworkInterfaceDownAfterDisabled()) {
BringNetworkInterfaceDown();
}
SLOG(this, 3) << "Device " << link_name_ << " ipconfig_ "
<< (ipconfig_ ? "is set." : "is not set.");
SLOG(this, 3) << "Device " << link_name_ << " ip6config_ "
<< (ip6config_ ? "is set." : "is not set.");
SLOG(this, 3) << "Device " << link_name_ << " connection_ "
<< (connection_ ? "is set." : "is not set.");
SLOG(this, 3) << "Device " << link_name_ << " selected_service_ "
<< (selected_service_ ? "is set." : "is not set.");
Stop(error, chained_callback);
}
}
void Device::UpdateIPConfigsProperty() {
adaptor_->EmitRpcIdentifierArrayChanged(kIPConfigsProperty,
AvailableIPConfigs(nullptr));
}
// static
std::vector<uint8_t> Device::MakeHardwareAddressFromString(
const std::string& address_string) {
std::string address_nosep;
base::RemoveChars(address_string, ":", &address_nosep);
std::vector<uint8_t> address_bytes;
base::HexStringToBytes(address_nosep, &address_bytes);
if (address_bytes.size() != kHardwareAddressLength) {
return std::vector<uint8_t>();
}
return address_bytes;
}
// static
std::string Device::MakeStringFromHardwareAddress(
const std::vector<uint8_t>& address_bytes) {
CHECK_EQ(kHardwareAddressLength, address_bytes.size());
return base::StringPrintf(
"%02x:%02x:%02x:%02x:%02x:%02x", address_bytes[0], address_bytes[1],
address_bytes[2], address_bytes[3], address_bytes[4], address_bytes[5]);
}
bool Device::RequestRoam(const std::string& addr, Error* error) {
return false;
}
bool Device::ShouldBringNetworkInterfaceDownAfterDisabled() const {
return false;
}
void Device::BringNetworkInterfaceDown() {
// If |fixed_ip_params_| is true, we don't manipulate the interface state.
if (!fixed_ip_params_)
rtnl_handler_->SetInterfaceFlags(interface_index(), 0, IFF_UP);
}
ControlInterface* Device::control_interface() const {
return manager_->control_interface();
}
EventDispatcher* Device::dispatcher() const {
return manager_->dispatcher();
}
Metrics* Device::metrics() const {
return manager_->metrics();
}
} // namespace shill