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chromium / aosp / platform / system / connectivity / shill / dc0f260466c76c2ece177e5c67c0d3b02956bee1 / . / device.cc
blob: 9d6dd1d6ea63778b29b447ca31127632d5d12c81 [file] [log] [blame]
//
// Copyright (C) 2012 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#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 <set>
#include <string>
#include <vector>
#include <base/bind.h>
#include <base/files/file_util.h>
#include <base/memory/ref_counted.h>
#include <base/stl_util.h>
#include <base/strings/stringprintf.h>
#include <base/strings/string_number_conversions.h>
#include <base/strings/string_util.h>
#include <chromeos/dbus/service_constants.h>
#include "shill/async_connection.h"
#include "shill/connection.h"
#include "shill/connection_tester.h"
#include "shill/control_interface.h"
#include "shill/dhcp/dhcp_config.h"
#include "shill/dhcp/dhcp_properties.h"
#include "shill/dhcp/dhcp_provider.h"
#include "shill/error.h"
#include "shill/event_dispatcher.h"
#include "shill/icmp.h"
#include "shill/ip_address_store.h"
#include "shill/link_monitor.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/property_accessor.h"
#include "shill/refptr_types.h"
#include "shill/service.h"
#include "shill/socket_info_reader.h"
#include "shill/store_interface.h"
#include "shill/technology.h"
#include "shill/tethering.h"
#include "shill/traffic_monitor.h"
using base::Bind;
using base::Callback;
using base::FilePath;
using base::StringPrintf;
using std::set;
using std::string;
using std::vector;
namespace shill {
namespace Logging {
static auto kModuleLogScope = ScopeLogger::kDevice;
static string ObjectID(Device* d) { return d->GetRpcIdentifier(); }
}
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 kIPFlagReversePathFilter[] = "rp_filter";
constexpr char kIPFlagReversePathFilterEnabled[] = "1";
constexpr char kIPFlagReversePathFilterLooseMode[] = "2";
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";
const char* const kFallbackDnsServers[] = {"8.8.8.8", "8.8.4.4"};
constexpr size_t kHardwareAddressLength = 6;
// Maximum seconds between two link monitor failures to declare this link
// (network) as unreliable.
constexpr int kLinkUnreliableThresholdSeconds = 60 * 60;
} // namespace
const char Device::kIPFlagDisableIPv6[] = "disable_ipv6";
const char Device::kIPFlagAcceptRouterAdvertisements[] = "accept_ra";
const char Device::kStoragePowered[] = "Powered";
const char Device::kStorageReceiveByteCount[] = "ReceiveByteCount";
const char Device::kStorageTransmitByteCount[] = "TransmitByteCount";
Device::Device(ControlInterface* control_interface,
EventDispatcher* dispatcher,
Metrics* metrics,
Manager* manager,
const string& link_name,
const string& address,
int interface_index,
Technology::Identifier technology)
: enabled_(false),
enabled_persistent_(true),
enabled_pending_(enabled_),
hardware_address_(base::ToLowerASCII(address)),
interface_index_(interface_index),
running_(false),
link_name_(link_name),
control_interface_(control_interface),
dispatcher_(dispatcher),
metrics_(metrics),
manager_(manager),
weak_ptr_factory_(this),
adaptor_(control_interface->CreateDeviceAdaptor(this)),
technology_(technology),
portal_attempts_to_online_(0),
receive_byte_offset_(0),
transmit_byte_offset_(0),
dhcp_provider_(DHCPProvider::GetInstance()),
routing_table_(RoutingTable::GetInstance()),
rtnl_handler_(RTNLHandler::GetInstance()),
time_(Time::GetInstance()),
last_link_monitor_failed_time_(0),
is_loose_routing_(false),
is_multi_homed_(false),
fixed_ip_params_(false) {
store_.RegisterConstString(kAddressProperty, &hardware_address_);
// kBgscanMethodProperty: Registered in WiFi
// kBgscanShortIntervalProperty: Registered in WiFi
// kBgscanSignalThresholdProperty: Registered in WiFi
// kCellularAllowRoamingProperty: Registered in Cellular
// kCarrierProperty: Registered in Cellular
// kEsnProperty: Registered in Cellular
// kHomeProviderProperty: Registered in Cellular
// kImeiProperty: Registered in Cellular
// kIccidProperty: Registered in Cellular
// kImsiProperty: 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
// kPRLVersionProperty: Registered in Cellular
// kSIMLockStatusProperty: Registered in Cellular
// kFoundNetworksProperty: Registered in Cellular
// kDBusObjectProperty: Register 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);
HelpRegisterConstDerivedUint64(kLinkMonitorResponseTimeProperty,
&Device::GetLinkMonitorResponseTime);
// kRoamThresholdProperty: Registered in WiFi
// kScanningProperty: Registered in WiFi, Cellular
// kScanIntervalProperty: Registered in WiFi, Cellular
// kWakeOnWiFiFeaturesEnabledProperty: Registered in WiFi
if (manager_ && manager_->device_info()) { // Unit tests may not have these.
manager_->device_info()->GetByteCounts(
interface_index_, &receive_byte_offset_, &transmit_byte_offset_);
HelpRegisterConstDerivedUint64(kReceiveByteCountProperty,
&Device::GetReceiveByteCountProperty);
HelpRegisterConstDerivedUint64(kTransmitByteCountProperty,
&Device::GetTransmitByteCountProperty);
}
LOG(INFO) << "Device created: " << link_name_
<< " index " << interface_index_;
}
Device::~Device() {
LOG(INFO) << "Device destructed: " << link_name_
<< " index " << interface_index_;
}
void Device::Initialize() {
SLOG(this, 2) << "Initialized";
DisableArpFiltering();
EnableReversePathFilter();
}
void Device::LinkEvent(unsigned flags, unsigned change) {
SLOG(this, 2) << "Device " << link_name_
<< std::showbase << std::hex
<< " flags " << flags << " changed " << change
<< std::dec << std::noshowbase;
}
void Device::Scan(Error* error, const string& reason) {
SLOG(this, 2) << __func__ << " [Device] on " << link_name() << " from "
<< reason;
Error::PopulateAndLog(FROM_HERE, error, Error::kNotSupported,
"Device doesn't support scan.");
}
void Device::SetSchedScan(bool enable, Error* error) {
SLOG(this, 2) << __func__ << " [Device] on " << link_name();
Error::PopulateAndLog(FROM_HERE, error, Error::kNotSupported,
"Device doesn't support scheduled scan.");
}
void Device::RegisterOnNetwork(const std::string& /*network_id*/, Error* error,
const ResultCallback& /*callback*/) {
Error::PopulateAndLog(FROM_HERE, error, Error::kNotSupported,
"Device doesn't support network registration.");
}
void Device::RequirePIN(
const string& /*pin*/, bool /*require*/,
Error* error, const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(FROM_HERE, error, Error::kNotSupported,
"Device doesn't support RequirePIN.");
}
void Device::EnterPIN(const string& /*pin*/,
Error* error, const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(FROM_HERE, error, Error::kNotSupported,
"Device doesn't support EnterPIN.");
}
void Device::UnblockPIN(const string& /*unblock_code*/,
const string& /*pin*/,
Error* error, const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(FROM_HERE, error, Error::kNotSupported,
"Device doesn't support UnblockPIN.");
}
void Device::ChangePIN(const string& /*old_pin*/,
const string& /*new_pin*/,
Error* error, const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(FROM_HERE, error, Error::kNotSupported,
"Device doesn't support ChangePIN.");
}
void Device::Reset(Error* error, const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(FROM_HERE, error, Error::kNotSupported,
"Device doesn't support Reset.");
}
void Device::SetCarrier(const string& /*carrier*/,
Error* error, const ResultCallback& /*callback*/) {
SLOG(this, 2) << __func__;
Error::PopulateAndLog(FROM_HERE, error, Error::kNotSupported,
"Device doesn't support SetCarrier.");
}
bool Device::IsIPv6Allowed() const {
return true;
}
void Device::DisableIPv6() {
SLOG(this, 2) << __func__;
SetIPFlag(IPAddress::kFamilyIPv6, kIPFlagDisableIPv6, "1");
}
void Device::EnableIPv6() {
SLOG(this, 2) << __func__;
if (!IsIPv6Allowed()) {
LOG(INFO) << "Skip enabling IPv6 on " << link_name_
<< " as it is not allowed.";
return;
}
SetIPFlag(IPAddress::kFamilyIPv6, kIPFlagDisableIPv6, "0");
// 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::SetLooseRouting(bool is_loose_routing) {
if (is_loose_routing == is_loose_routing_) {
return;
}
is_loose_routing_ = is_loose_routing;
if (is_multi_homed_) {
// Nothing to do: loose routing is already enabled, and should remain so.
return;
}
if (is_loose_routing) {
DisableReversePathFilter();
} else {
EnableReversePathFilter();
}
}
void Device::DisableReversePathFilter() {
// TODO(pstew): Current kernel doesn't offer reverse-path filtering flag
// for IPv6. crbug.com/207193
SetIPFlag(IPAddress::kFamilyIPv4, kIPFlagReversePathFilter,
kIPFlagReversePathFilterLooseMode);
}
void Device::EnableReversePathFilter() {
SetIPFlag(IPAddress::kFamilyIPv4, kIPFlagReversePathFilter,
kIPFlagReversePathFilterEnabled);
}
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();
if (!is_loose_routing_) {
DisableReversePathFilter();
}
} else {
DisableArpFiltering();
if (!is_loose_routing_) {
EnableReversePathFilter();
}
}
}
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_.get())
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());
}
string Device::GetRpcIdentifier() const {
return adaptor_->GetRpcIdentifier();
}
string Device::GetStorageIdentifier() const {
return "device_" + hardware_address_;
}
vector<GeolocationInfo> Device::GetGeolocationObjects() const {
return vector<GeolocationInfo>();
}
string Device::GetTechnologyString(Error* /*error*/) {
return Technology::NameFromIdentifier(technology());
}
const string& Device::UniqueName() const {
return link_name_;
}
bool Device::Load(StoreInterface* storage) {
const string 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_);
uint64_t rx_byte_count = 0, tx_byte_count = 0;
manager_->device_info()->GetByteCounts(
interface_index_, &rx_byte_count, &tx_byte_count);
// If there is a byte-count present in the profile, the return value
// of Device::Get*ByteCount() should be the this stored value plus
// whatever additional bytes we receive since time-of-load. We
// accomplish this by the subtractions below, which can validly
// roll over "negative" in the subtractions below and in Get*ByteCount.
uint64_t profile_byte_count;
if (storage->GetUint64(id, kStorageReceiveByteCount, &profile_byte_count)) {
receive_byte_offset_ = rx_byte_count - profile_byte_count;
}
if (storage->GetUint64(id, kStorageTransmitByteCount, &profile_byte_count)) {
transmit_byte_offset_ = tx_byte_count - profile_byte_count;
}
return true;
}
bool Device::Save(StoreInterface* storage) {
const string id = GetStorageIdentifier();
storage->SetBool(id, kStoragePowered, enabled_persistent_);
storage->SetUint64(id, kStorageReceiveByteCount, GetReceiveByteCount());
storage->SetUint64(id, kStorageTransmitByteCount, GetTransmitByteCount());
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();
if (link_monitor_) {
SLOG(this, 3) << "Informing Link Monitor of resume.";
link_monitor_->OnAfterResume();
}
// Resume from sleep, could be in different location now.
// Ignore previous link monitor failures.
if (selected_service_) {
selected_service_->set_unreliable(false);
reliable_link_callback_.Cancel();
}
last_link_monitor_failed_time_ = 0;
}
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_.get()) {
return;
}
selected_service_->set_unreliable(false);
reliable_link_callback_.Cancel();
selected_service_ = nullptr;
adaptor_->EmitRpcIdentifierChanged(
kSelectedServiceProperty, GetSelectedServiceRpcIdentifier(nullptr));
}
void Device::DestroyIPConfig() {
DisableIPv6();
bool ipconfig_changed = false;
if (ipconfig_.get()) {
ipconfig_->ReleaseIP(IPConfig::kReleaseReasonDisconnect);
ipconfig_ = nullptr;
ipconfig_changed = true;
}
if (ip6config_.get()) {
StopIPv6DNSServerTimer();
ip6config_ = nullptr;
ipconfig_changed = true;
}
if (dhcpv6_config_.get()) {
dhcpv6_config_->ReleaseIP(IPConfig::kReleaseReasonDisconnect);
dhcpv6_config_ = nullptr;
ipconfig_changed = true;
}
// Emit updated IP configs if there are any changes.
if (ipconfig_changed) {
UpdateIPConfigsProperty();
}
DestroyConnection();
}
void Device::OnIPv6AddressChanged() {
IPAddress address(IPAddress::kFamilyIPv6);
if (!manager_->device_info()->GetPrimaryIPv6Address(
interface_index_, &address)) {
if (ip6config_) {
ip6config_ = nullptr;
UpdateIPConfigsProperty();
}
return;
}
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_ = new 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;
PrependDNSServers(IPAddress::kFamilyIPv6, &properties.dns_servers);
ip6config_->set_properties(properties);
UpdateIPConfigsProperty();
OnIPv6ConfigUpdated();
}
void Device::OnIPv6DnsServerAddressesChanged() {
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;
}
vector<string> addresses_str;
for (const auto& ip : server_addresses) {
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_ = new IPConfig(control_interface_, link_name_);
}
if (lifetime != ND_OPT_LIFETIME_INFINITY) {
// Setup timer to monitor DNS server lifetime if not infinite lifetime.
StartIPv6DNSServerTimer(lifetime);
ip6config_->UpdateLeaseExpirationTime(lifetime);
} else {
ip6config_->ResetLeaseExpirationTime();
}
PrependDNSServers(IPAddress::kFamilyIPv6, &addresses_str);
// 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(addresses_str);
UpdateIPConfigsProperty();
OnIPv6ConfigUpdated();
}
void Device::StartIPv6DNSServerTimer(uint32_t lifetime_seconds) {
int64_t delay = static_cast<int64_t>(lifetime_seconds) * 1000;
ipv6_dns_server_expired_callback_.Reset(
base::Bind(&Device::IPv6DNSServerExpired, base::Unretained(this)));
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(vector<string>());
UpdateIPConfigsProperty();
}
void Device::StopAllActivities() {
StopTrafficMonitor();
StopPortalDetection();
StopConnectivityTest();
StopConnectionDiagnostics();
StopLinkMonitor();
StopDNSTest();
StopIPv6DNSServerTimer();
}
void Device::AddWakeOnPacketConnection(const string& ip_endpoint,
Error* error) {
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotSupported,
"AddWakeOnPacketConnection not implemented for " + link_name_ + ".");
return;
}
void Device::AddWakeOnPacketOfTypes(
const std::vector<std::string>& packet_types, Error* error) {
Error::PopulateAndLog(
FROM_HERE,
error,
Error::kNotSupported,
"AddWakeOnPacketOfType not implemented for " + link_name_ + ".");
return;
}
void Device::RemoveWakeOnPacketConnection(const string& ip_endpoint,
Error* error) {
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotSupported,
"RemoveWakeOnPacketConnection not implemented for " + link_name_ + ".");
return;
}
void Device::RemoveWakeOnPacketOfTypes(
const std::vector<std::string>& packet_types, Error* error) {
Error::PopulateAndLog(
FROM_HERE,
error,
Error::kNotSupported,
"RemoveWakeOnPacketOfType not implemented for " + link_name_ + ".");
return;
}
void Device::RemoveAllWakeOnPacketConnections(Error* error) {
Error::PopulateAndLog(
FROM_HERE, error, Error::kNotSupported,
"RemoveAllWakeOnPacketConnections not implemented for " + link_name_ +
".");
return;
}
void Device::RenewDHCPLease() {
LOG(INFO) << __func__;
if (ipconfig_) {
SLOG(this, 3) << "Renewing IPv4 Address";
ipconfig_->RenewIP();
}
if (ip6config_) {
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();
}
if (dhcpv6_config_) {
SLOG(this, 3) << "Renewing DHCPv6 lease";
dhcpv6_config_->RenewIP();
}
}
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(string());
}
bool Device::AcquireIPConfigWithLeaseName(const string& lease_name) {
DestroyIPConfig();
EnableIPv6();
bool arp_gateway = manager_->GetArpGateway() && ShouldUseArpGateway();
DHCPConfigRefPtr dhcp_config;
if (selected_service_) {
dhcp_config =
dhcp_provider_->CreateIPv4Config(
link_name_,
lease_name,
arp_gateway,
*(DhcpProperties::Combine(
manager_->dhcp_properties(),
selected_service_->dhcp_properties())));
} else {
dhcp_config =
dhcp_provider_->CreateIPv4Config(link_name_,
lease_name,
arp_gateway,
manager_->dhcp_properties());
}
const int minimum_mtu = manager()->GetMinimumMTU();
if (minimum_mtu != IPConfig::kUndefinedMTU) {
dhcp_config->set_minimum_mtu(minimum_mtu);
}
ipconfig_ = dhcp_config;
ipconfig_->RegisterUpdateCallback(Bind(&Device::OnIPConfigUpdated,
weak_ptr_factory_.GetWeakPtr()));
ipconfig_->RegisterFailureCallback(Bind(&Device::OnIPConfigFailed,
weak_ptr_factory_.GetWeakPtr()));
ipconfig_->RegisterRefreshCallback(Bind(&Device::OnIPConfigRefreshed,
weak_ptr_factory_.GetWeakPtr()));
ipconfig_->RegisterExpireCallback(Bind(&Device::OnIPConfigExpired,
weak_ptr_factory_.GetWeakPtr()));
dispatcher_->PostTask(FROM_HERE, Bind(&Device::ConfigureStaticIPTask,
weak_ptr_factory_.GetWeakPtr()));
if (!ipconfig_->RequestIP()) {
return false;
}
#ifndef DISABLE_DHCPV6
// Only start DHCPv6 configuration instance only if DHCPv6 is enabled
// for this device.
if (manager_->IsDHCPv6EnabledForDevice(link_name_)) {
return AcquireIPv6ConfigWithLeaseName(lease_name);
}
#endif // DISABLE_DHCPV6
return true;
}
#ifndef DISABLE_DHCPV6
bool Device::AcquireIPv6ConfigWithLeaseName(const string& lease_name) {
auto dhcpv6_config =
dhcp_provider_->CreateIPv6Config(link_name_, lease_name);
dhcpv6_config_ = dhcpv6_config;
dhcpv6_config_->RegisterUpdateCallback(
Bind(&Device::OnDHCPv6ConfigUpdated, weak_ptr_factory_.GetWeakPtr()));
dhcpv6_config_->RegisterFailureCallback(
Bind(&Device::OnDHCPv6ConfigFailed, weak_ptr_factory_.GetWeakPtr()));
dhcpv6_config_->RegisterExpireCallback(
Bind(&Device::OnDHCPv6ConfigExpired, weak_ptr_factory_.GetWeakPtr()));
if (!dhcpv6_config_->RequestIP()) {
return false;
}
return true;
}
#endif // DISABLE_DHCPV6
void Device::RefreshIPConfig() {
SLOG(this, 2) << __func__;
if (ipconfig_.get()) {
bool updated;
if (manager_->ShouldBlackholeBrowserTraffic(UniqueName())) {
updated = ipconfig_->SetBlackholedUids(manager_->browser_traffic_uids());
} else {
updated = ipconfig_->ClearBlackholedUids();
}
if (updated) {
SetupConnection(ipconfig_);
}
}
}
void Device::AssignIPConfig(const IPConfig::Properties& properties) {
DestroyIPConfig();
EnableIPv6();
ipconfig_ = new IPConfig(control_interface_, link_name_);
ipconfig_->set_properties(properties);
dispatcher_->PostTask(FROM_HERE, Bind(&Device::OnIPConfigUpdated,
weak_ptr_factory_.GetWeakPtr(), ipconfig_, true));
}
void Device::DestroyIPConfigLease(const string& name) {
dhcp_provider_->DestroyLease(name);
}
void Device::HelpRegisterConstDerivedString(
const string& name,
string(Device::*get)(Error* error)) {
store_.RegisterDerivedString(
name,
StringAccessor(new CustomAccessor<Device, string>(this, get, nullptr)));
}
void Device::HelpRegisterConstDerivedRpcIdentifier(
const string& name,
RpcIdentifier(Device::*get)(Error* error)) {
store_.RegisterDerivedRpcIdentifier(
name,
RpcIdentifierAccessor(
new CustomAccessor<Device, RpcIdentifier>(this, get, nullptr)));
}
void Device::HelpRegisterConstDerivedRpcIdentifiers(
const string& name,
RpcIdentifiers(Device::*get)(Error*)) {
store_.RegisterDerivedRpcIdentifiers(
name,
RpcIdentifiersAccessor(
new CustomAccessor<Device, RpcIdentifiers>(this, get, nullptr)));
}
void Device::HelpRegisterConstDerivedUint64(
const string& name,
uint64_t(Device::*get)(Error*)) {
store_.RegisterDerivedUint64(
name,
Uint64Accessor(
new CustomAccessor<Device, uint64_t>(this, get, nullptr)));
}
void Device::ConnectionTesterCallback() {
LOG(INFO) << "Device " << link_name() << ": Completed Connectivity Test";
return;
}
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.
OnIPConfigUpdated(ipconfig_, true);
} 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
// OnIPConfigUpdated() when it completes.
SLOG(this, 2) << __func__ << " " << " no static IP address.";
}
}
bool Device::IPConfigCompleted(const IPConfigRefPtr& ipconfig) {
return ipconfig && !ipconfig->properties().address.empty() &&
!ipconfig->properties().dns_servers.empty();
}
void Device::OnIPv6ConfigUpdated() {
if (connection_ && ip6config_)
connection_->UpdateGatewayMetric(ip6config_);
// 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 (IPConfigCompleted(ip6config_) &&
(!connection_ || connection_->IsIPv6())) {
SetupConnection(ip6config_);
}
}
void Device::SetupConnection(const IPConfigRefPtr& ipconfig) {
CreateConnection();
if (manager_->ShouldBlackholeBrowserTraffic(UniqueName())) {
ipconfig->SetBlackholedUids(manager_->browser_traffic_uids());
} else {
ipconfig->ClearBlackholedUids();
}
connection_->UpdateFromIPConfig(ipconfig);
// 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 = IPConfigCompleted(ip6config_);
metrics_->NotifyIPv6ConnectivityStatus(technology_, ipv6_connectivity);
// SetConnection must occur after the UpdateFromIPConfig so the
// service can use the values derived from the connection.
if (selected_service_) {
// The service state change needs to happen after this call, so that
// at the time we report the state change to the manager, the service
// has its connection.
selected_service_->SetConnection(connection_);
// If this function was called due to a DHCP renewal, avoid transitioning
// from Connected->Online->Connected because that can affect the service
// sort order. In this case, perform portal detection "optimistically"
// in the Online state, and transition from Online->Portal if it fails.
if (selected_service_->state() != Service::kStateOnline)
SetServiceState(Service::kStateConnected);
OnConnected();
portal_attempts_to_online_ = 0;
// Subtle: Start portal detection after transitioning the service
// to the Connected state because this call may immediately transition
// to the Online state.
StartPortalDetection();
}
SetHostname(ipconfig->properties().accepted_hostname);
StartLinkMonitor();
StartTrafficMonitor();
}
bool Device::SetHostname(const std::string& hostname) {
if (hostname.empty() || !manager()->ShouldAcceptHostnameFrom(link_name_)) {
return false;
}
string fixed_hostname = hostname;
if (fixed_hostname.length() > MAXHOSTNAMELEN) {
auto truncate_length = fixed_hostname.find('.');
if (truncate_length == string::npos || truncate_length > MAXHOSTNAMELEN) {
truncate_length = MAXHOSTNAMELEN;
}
fixed_hostname.resize(truncate_length);
}
return manager_->device_info()->SetHostname(fixed_hostname);
}
void Device::PrependDNSServersIntoIPConfig(const IPConfigRefPtr& ipconfig) {
const auto& properties = ipconfig->properties();
vector<string> servers(properties.dns_servers.begin(),
properties.dns_servers.end());
PrependDNSServers(properties.address_family, &servers);
if (servers == properties.dns_servers) {
// If the server list is the same after being augmented then there's no need
// to update the config's list of servers.
return;
}
ipconfig->UpdateDNSServers(servers);
}
void Device::PrependDNSServers(const IPAddress::Family family,
vector<string>* servers) {
vector<string>output_servers =
manager_->FilterPrependDNSServersByFamily(family);
set<string> unique(output_servers.begin(), output_servers.end());
for (const auto& server : *servers) {
if (unique.find(server) == unique.end()) {
output_servers.push_back(server);
unique.insert(server);
}
}
servers->swap(output_servers);
}
void Device::ConnectionDiagnosticsCallback(
const std::string& connection_issue,
const std::vector<ConnectionDiagnostics::Event>& diagnostic_events) {
SLOG(this, 2) << "Device " << link_name()
<< ": Completed Connection diagnostics";
// TODO(samueltan): add connection diagnostics metrics.
}
void Device::OnIPConfigUpdated(const IPConfigRefPtr& ipconfig,
bool /*new_lease_acquired*/) {
SLOG(this, 2) << __func__;
if (selected_service_) {
ipconfig->ApplyStaticIPParameters(
selected_service_->mutable_static_ip_parameters());
if (IsUsingStaticIP()) {
// 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.
ipconfig->ReleaseIP(IPConfig::kReleaseReasonStaticIP);
}
}
if (!IsUsingStaticNameServers()) {
PrependDNSServersIntoIPConfig(ipconfig);
}
SetupConnection(ipconfig);
UpdateIPConfigsProperty();
}
void Device::OnIPConfigFailed(const IPConfigRefPtr& ipconfig) {
SLOG(this, 2) << __func__;
// TODO(pstew): This logic gets yet more complex when multiple
// IPConfig types are run in parallel (e.g. DHCP and DHCP6)
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 (IPConfigCompleted(ip6config_)) {
if (!connection_ || !connection_->IsIPv6()) {
// Setup IPv6 connection.
SetupConnection(ip6config_);
} else {
// Ignore IPv4 config failure, since IPv6 is up.
}
return;
}
OnIPConfigFailure();
DestroyConnection();
}
void Device::OnIPConfigRefreshed(const IPConfigRefPtr& ipconfig) {
// Clear the previously applied static IP parameters.
ipconfig->RestoreSavedIPParameters(
selected_service_->mutable_static_ip_parameters());
dispatcher_->PostTask(FROM_HERE, Bind(&Device::ConfigureStaticIPTask,
weak_ptr_factory_.GetWeakPtr()));
}
void Device::OnIPConfigFailure() {
if (selected_service_) {
Error error;
selected_service_->DisconnectWithFailure(Service::kFailureDHCP,
&error,
__func__);
}
}
void Device::OnIPConfigExpired(const IPConfigRefPtr& ipconfig) {
metrics()->SendToUMA(
metrics()->GetFullMetricName(
Metrics::kMetricExpiredLeaseLengthSecondsSuffix, technology()),
ipconfig->properties().lease_duration_seconds,
Metrics::kMetricExpiredLeaseLengthSecondsMin,
Metrics::kMetricExpiredLeaseLengthSecondsMax,
Metrics::kMetricExpiredLeaseLengthSecondsNumBuckets);
}
void Device::OnDHCPv6ConfigUpdated(const IPConfigRefPtr& ipconfig,
bool /*new_lease_acquired*/) {
// Emit configuration update.
UpdateIPConfigsProperty();
}
void Device::OnDHCPv6ConfigFailed(const IPConfigRefPtr& ipconfig) {
// Reset configuration data.
ipconfig->ResetProperties();
UpdateIPConfigsProperty();
}
void Device::OnDHCPv6ConfigExpired(const IPConfigRefPtr& ipconfig) {
// Reset configuration data.
ipconfig->ResetProperties();
UpdateIPConfigsProperty();
}
void Device::OnConnected() {
if (selected_service_->unreliable()) {
// Post a delayed task to reset link back to reliable if no link
// failure is detected in the next 5 minutes.
reliable_link_callback_.Reset(
base::Bind(&Device::OnReliableLink, base::Unretained(this)));
dispatcher_->PostDelayedTask(FROM_HERE,
reliable_link_callback_.callback(),
kLinkUnreliableThresholdSeconds * 1000);
}
}
void Device::OnConnectionUpdated() {
if (selected_service_) {
manager_->UpdateService(selected_service_);
}
}
void Device::CreateConnection() {
SLOG(this, 2) << __func__;
if (!connection_.get()) {
connection_ = new Connection(interface_index_,
link_name_,
fixed_ip_params_,
technology_,
manager_->device_info(),
control_interface_);
}
}
void Device::DestroyConnection() {
SLOG(this, 2) << __func__ << " on " << link_name_;
StopAllActivities();
if (selected_service_.get()) {
SLOG(this, 3) << "Clearing connection of service "
<< selected_service_->unique_name();
selected_service_->SetConnection(nullptr);
}
connection_ = nullptr;
}
void Device::SelectService(const ServiceRefPtr& service) {
SLOG(this, 2) << __func__ << ": service "
<< (service ? service->unique_name() : "*reset*")
<< " on " << link_name_;
if (selected_service_.get() == service.get()) {
// No change to |selected_service_|. Return early to avoid
// changing its state.
return;
}
if (selected_service_.get()) {
if (selected_service_->state() != Service::kStateFailure) {
selected_service_->SetState(Service::kStateIdle);
}
// Just in case the Device subclass has not already done so, make
// sure the previously selected service has its connection removed.
selected_service_->SetConnection(nullptr);
// Reset link status for the previously selected service.
selected_service_->set_unreliable(false);
reliable_link_callback_.Cancel();
StopAllActivities();
}
// Newly selected service (network), previous failures doesn't apply
// anymore.
last_link_monitor_failed_time_ = 0;
selected_service_ = service;
adaptor_->EmitRpcIdentifierChanged(
kSelectedServiceProperty, GetSelectedServiceRpcIdentifier(nullptr));
}
void Device::SetServiceState(Service::ConnectState state) {
if (selected_service_.get()) {
selected_service_->SetState(state);
}
}
void Device::SetServiceFailure(Service::ConnectFailure failure_state) {
if (selected_service_.get()) {
selected_service_->SetFailure(failure_state);
}
}
void Device::SetServiceFailureSilent(Service::ConnectFailure failure_state) {
if (selected_service_.get()) {
selected_service_->SetFailureSilent(failure_state);
}
}
bool Device::SetIPFlag(IPAddress::Family family, const string& flag,
const string& value) {
string ip_version;
if (family == IPAddress::kFamilyIPv4) {
ip_version = kIPFlagVersion4;
} else if (family == IPAddress::kFamilyIPv6) {
ip_version = kIPFlagVersion6;
} else {
NOTIMPLEMENTED();
}
FilePath flag_file(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) {
string message = StringPrintf("IP flag write failed: %s to %s",
value.c_str(), flag_file.value().c_str());
if (!base::PathExists(flag_file) &&
base::ContainsKey(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;
}
string Device::PerformTDLSOperation(const string& /* operation */,
const string& /* peer */,
Error* /* error */) {
return "";
}
void Device::ResetByteCounters() {
manager_->device_info()->GetByteCounts(
interface_index_, &receive_byte_offset_, &transmit_byte_offset_);
manager_->UpdateDevice(this);
}
bool Device::RestartPortalDetection() {
StopPortalDetection();
return StartPortalDetection();
}
bool Device::RequestPortalDetection() {
if (!selected_service_) {
SLOG(this, 2) << link_name()
<< ": No selected service, so no need for portal check.";
return false;
}
if (!connection_.get()) {
SLOG(this, 2) << link_name()
<< ": No connection, so no need for portal check.";
return false;
}
if (selected_service_->state() != Service::kStatePortal) {
SLOG(this, 2) << link_name()
<< ": Service is not in portal state. "
<< "No need to start check.";
return false;
}
if (!connection_->IsDefault()) {
SLOG(this, 2) << link_name()
<< ": Service is not the default connection. "
<< "Don't start check.";
return false;
}
if (portal_detector_.get() && portal_detector_->IsInProgress()) {
SLOG(this, 2) << link_name()
<< ": Portal detection is already running.";
return true;
}
return StartPortalDetection();
}
bool Device::StartPortalDetection() {
DCHECK(selected_service_);
if (selected_service_->IsPortalDetectionDisabled()) {
SLOG(this, 2) << "Service " << selected_service_->unique_name()
<< ": Portal detection is disabled; "
<< "marking service online.";
SetServiceConnectedState(Service::kStateOnline);
return false;
}
if (selected_service_->IsPortalDetectionAuto() &&
!manager_->IsPortalDetectionEnabled(technology())) {
// If portal detection is disabled for this technology, immediately set
// the service state to "Online".
SLOG(this, 2) << "Device " << link_name()
<< ": Portal detection is disabled; "
<< "marking service online.";
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.
SLOG(this, 2) << "Device " << link_name()
<< ": Service has proxy config; marking it online.";
SetServiceConnectedState(Service::kStateOnline);
return false;
}
portal_detector_.reset(new PortalDetector(
connection_,
dispatcher_,
Bind(&Device::PortalDetectorCallback, weak_ptr_factory_.GetWeakPtr())));
if (!portal_detector_->Start(manager_->GetPortalCheckURL())) {
LOG(ERROR) << "Device " << link_name()
<< ": Portal detection failed to start: likely bad URL: "
<< manager_->GetPortalCheckURL();
SetServiceConnectedState(Service::kStateOnline);
return false;
}
SLOG(this, 2) << "Device " << link_name()
<< ": Portal detection has started.";
return true;
}
void Device::StopPortalDetection() {
SLOG(this, 2) << "Device " << link_name()
<< ": Portal detection stopping.";
portal_detector_.reset();
}
bool Device::StartConnectionDiagnosticsAfterPortalDetection(
const PortalDetector::Result& result) {
connection_diagnostics_.reset(
new ConnectionDiagnostics(connection_,
dispatcher_,
metrics_,
manager_->device_info(),
Bind(&Device::ConnectionDiagnosticsCallback,
weak_ptr_factory_.GetWeakPtr())));
if (!connection_diagnostics_->StartAfterPortalDetection(
manager_->GetPortalCheckURL(), result)) {
LOG(ERROR) << "Device " << link_name()
<< ": Connection diagnostics failed to start: likely bad URL: "
<< manager_->GetPortalCheckURL();
connection_diagnostics_.reset();
return false;
}
SLOG(this, 2) << "Device " << link_name()
<< ": Connection diagnostics has started.";
return true;
}
void Device::StopConnectionDiagnostics() {
SLOG(this, 2) << "Device " << link_name()
<< ": Connection diagnostics stopping.";
connection_diagnostics_.reset();
}
bool Device::StartConnectivityTest() {
LOG(INFO) << "Device " << link_name() << " starting connectivity test.";
connection_tester_.reset(new ConnectionTester(
connection_,
dispatcher_,
Bind(&Device::ConnectionTesterCallback, weak_ptr_factory_.GetWeakPtr())));
connection_tester_->Start();
return true;
}
void Device::StopConnectivityTest() {
SLOG(this, 2) << "Device " << link_name()
<< ": Connectivity test stopping.";
connection_tester_.reset();
}
void Device::set_link_monitor(LinkMonitor* link_monitor) {
link_monitor_.reset(link_monitor);
}
bool Device::StartLinkMonitor() {
if (!manager_->IsTechnologyLinkMonitorEnabled(technology())) {
SLOG(this, 2) << "Device " << link_name()
<< ": Link Monitoring is disabled.";
return false;
}
if (selected_service_ && selected_service_->link_monitor_disabled()) {
SLOG(this, 2) << "Device " << link_name()
<< ": Link Monitoring is disabled for the selected service";
return false;
}
if (!link_monitor()) {
set_link_monitor(
new LinkMonitor(
connection_, dispatcher_, metrics(), manager_->device_info(),
Bind(&Device::OnLinkMonitorFailure, weak_ptr_factory_.GetWeakPtr()),
Bind(&Device::OnLinkMonitorGatewayChange,
weak_ptr_factory_.GetWeakPtr())));
}
SLOG(this, 2) << "Device " << link_name()
<< ": Link Monitor starting.";
return link_monitor_->Start();
}
void Device::StopLinkMonitor() {
SLOG(this, 2) << "Device " << link_name()
<< ": Link Monitor stopping.";
link_monitor_.reset();
}
void Device::OnUnreliableLink() {
SLOG(this, 2) << "Device " << link_name()
<< ": Link is unreliable.";
selected_service_->set_unreliable(true);
reliable_link_callback_.Cancel();
metrics_->NotifyUnreliableLinkSignalStrength(
technology_, selected_service_->strength());
}
void Device::OnReliableLink() {
SLOG(this, 2) << "Device " << link_name()
<< ": Link is reliable.";
selected_service_->set_unreliable(false);
// TODO(zqiu): report signal strength to UMA.
}
void Device::OnLinkMonitorFailure() {
SLOG(this, 2) << "Device " << link_name()
<< ": Link Monitor indicates failure.";
if (!selected_service_) {
return;
}
time_t now;
time_->GetSecondsBoottime(&now);
if (last_link_monitor_failed_time_ != 0 &&
now - last_link_monitor_failed_time_ < kLinkUnreliableThresholdSeconds) {
OnUnreliableLink();
}
last_link_monitor_failed_time_ = now;
}
void Device::OnLinkMonitorGatewayChange() {
string gateway_mac = link_monitor()->gateway_mac_address().HexEncode();
int connection_id = manager_->CalcConnectionId(
ipconfig_->properties().gateway, gateway_mac);
CHECK(selected_service_);
selected_service_->set_connection_id(connection_id);
manager_->ReportServicesOnSameNetwork(connection_id);
}
bool Device::StartDNSTest(
const vector<string>& dns_servers,
bool retry_until_success,
const Callback<void(const DnsServerTester::Status)>& callback) {
if (dns_server_tester_.get()) {
LOG(ERROR) << link_name() << ": "
<< "Failed to start DNS Test: current test still running";
return false;
}
dns_server_tester_.reset(new DnsServerTester(connection_,
dispatcher_,
dns_servers,
retry_until_success,
callback));
dns_server_tester_->Start();
return true;
}
void Device::StopDNSTest() {
dns_server_tester_.reset();
}
void Device::FallbackDNSResultCallback(const DnsServerTester::Status status) {
StopDNSTest();
int result = Metrics::kFallbackDNSTestResultFailure;
if (status == DnsServerTester::kStatusSuccess) {
result = Metrics::kFallbackDNSTestResultSuccess;
// Switch to fallback DNS server if service is configured to allow DNS
// fallback.
CHECK(selected_service_);
if (selected_service_->is_dns_auto_fallback_allowed()) {
LOG(INFO) << "Device " << link_name()
<< ": Switching to fallback DNS servers.";
// Save the DNS servers from ipconfig.
config_dns_servers_ = ipconfig_->properties().dns_servers;
SwitchDNSServers(vector<string>(std::begin(kFallbackDnsServers),
std::end(kFallbackDnsServers)));
// Start DNS test for configured DNS servers.
StartDNSTest(config_dns_servers_,
true,
Bind(&Device::ConfigDNSResultCallback,
weak_ptr_factory_.GetWeakPtr()));
}
}
metrics()->NotifyFallbackDNSTestResult(technology_, result);
}
void Device::ConfigDNSResultCallback(const DnsServerTester::Status status) {
StopDNSTest();
// DNS test failed to start due to internal error.
if (status == DnsServerTester::kStatusFailure) {
return;
}
// Switch back to the configured DNS servers.
LOG(INFO) << "Device " << link_name()
<< ": Switching back to configured DNS servers.";
SwitchDNSServers(config_dns_servers_);
}
void Device::SwitchDNSServers(const vector<string>& dns_servers) {
CHECK(ipconfig_);
CHECK(connection_);
// Push new DNS servers setting to the IP config object.
ipconfig_->UpdateDNSServers(dns_servers);
// Push new DNS servers setting to the current connection, so the resolver
// will be updated to use the new DNS servers.
connection_->UpdateDNSServers(dns_servers);
// Allow the service to notify Chrome of ipconfig changes.
selected_service_->NotifyIPConfigChanges();
// Restart the portal detection with the new DNS setting.
RestartPortalDetection();
}
void Device::set_traffic_monitor(TrafficMonitor* traffic_monitor) {
traffic_monitor_.reset(traffic_monitor);
}
bool Device::TimeToNextDHCPLeaseRenewal(uint32_t* result) {
if (!ipconfig() && !ip6config()) {
return false;
}
uint32_t time_to_ipv4_lease_expiry = UINT32_MAX;
uint32_t time_to_ipv6_lease_expiry = UINT32_MAX;
if (ipconfig()) {
ipconfig()->TimeToLeaseExpiry(&time_to_ipv4_lease_expiry);
}
if (ip6config()) {
ip6config()->TimeToLeaseExpiry(&time_to_ipv6_lease_expiry);
}
*result = std::min(time_to_ipv4_lease_expiry, time_to_ipv6_lease_expiry);
return true;
}
bool Device::IsTrafficMonitorEnabled() const {
return false;
}
void Device::StartTrafficMonitor() {
// Return if traffic monitor is not enabled for this device.
if (!IsTrafficMonitorEnabled()) {
return;
}
SLOG(this, 2) << "Device " << link_name()
<< ": Traffic Monitor starting.";
if (!traffic_monitor_.get()) {
traffic_monitor_.reset(new TrafficMonitor(this, dispatcher_));
traffic_monitor_->set_network_problem_detected_callback(
Bind(&Device::OnEncounterNetworkProblem,
weak_ptr_factory_.GetWeakPtr()));
}
traffic_monitor_->Start();
}
void Device::StopTrafficMonitor() {
// Return if traffic monitor is not enabled for this device.
if (!IsTrafficMonitorEnabled()) {
return;
}
if (traffic_monitor_.get()) {
SLOG(this, 2) << "Device " << link_name()
<< ": Traffic Monitor stopping.";
traffic_monitor_->Stop();
}
traffic_monitor_.reset();
}
void Device::OnEncounterNetworkProblem(int reason) {
int metric_code;
switch (reason) {
case TrafficMonitor::kNetworkProblemCongestedTxQueue:
metric_code = Metrics::kNetworkProblemCongestedTCPTxQueue;
break;
case TrafficMonitor::kNetworkProblemDNSFailure:
metric_code = Metrics::kNetworkProblemDNSFailure;
break;
default:
LOG(ERROR) << "Invalid network problem code: " << reason;
return;
}
metrics()->NotifyNetworkProblemDetected(technology_, metric_code);
// Stop the traffic monitor, only report the first network problem detected
// on the connection for now.
StopTrafficMonitor();
}
void Device::SetServiceConnectedState(Service::ConnectState state) {
DCHECK(selected_service_.get());
if (!selected_service_.get()) {
LOG(ERROR) << link_name() << ": "
<< "Portal detection completed but no selected service exists!";
return;
}
if (!selected_service_->IsConnected()) {
LOG(ERROR) << link_name() << ": "
<< "Portal detection completed but selected service "
<< selected_service_->unique_name()
<< " is in non-connected state.";
return;
}
if (state == Service::kStatePortal && connection_->IsDefault() &&
manager_->GetPortalCheckInterval() != 0) {
CHECK(portal_detector_.get());
if (!portal_detector_->StartAfterDelay(
manager_->GetPortalCheckURL(),
manager_->GetPortalCheckInterval())) {
LOG(ERROR) << "Device " << link_name()
<< ": Portal detection failed to restart: likely bad URL: "
<< manager_->GetPortalCheckURL();
SetServiceState(Service::kStateOnline);
portal_detector_.reset();
return;
}
SLOG(this, 2) << "Device " << link_name()
<< ": Portal detection retrying.";
} else {
SLOG(this, 2) << "Device " << link_name()
<< ": Portal will not retry.";
portal_detector_.reset();
}
SetServiceState(state);
}
void Device::PortalDetectorCallback(const PortalDetector::Result& result) {
if (!result.final) {
SLOG(this, 2) << "Device " << link_name()
<< ": Received non-final status: "
<< ConnectivityTrial::StatusToString(
result.trial_result.status);
return;
}
SLOG(this, 2) << "Device " << link_name()
<< ": Received final status: "
<< ConnectivityTrial::StatusToString(
result.trial_result.status);
portal_attempts_to_online_ += result.num_attempts;
int portal_status = Metrics::PortalDetectionResultToEnum(result);
metrics()->SendEnumToUMA(
metrics()->GetFullMetricName(Metrics::kMetricPortalResultSuffix,
technology()),
portal_status,
Metrics::kPortalResultMax);
if (result.trial_result.status == ConnectivityTrial::kStatusSuccess) {
SetServiceConnectedState(Service::kStateOnline);
metrics()->SendToUMA(
metrics()->GetFullMetricName(
Metrics::kMetricPortalAttemptsToOnlineSuffix, technology()),
portal_attempts_to_online_,
Metrics::kMetricPortalAttemptsToOnlineMin,
Metrics::kMetricPortalAttemptsToOnlineMax,
Metrics::kMetricPortalAttemptsToOnlineNumBuckets);
} else {
// Set failure phase and status.
if (selected_service_.get()) {
selected_service_->SetPortalDetectionFailure(
ConnectivityTrial::PhaseToString(result.trial_result.phase),
ConnectivityTrial::StatusToString(result.trial_result.status));
}
SetServiceConnectedState(Service::kStatePortal);
metrics()->SendToUMA(
metrics()->GetFullMetricName(
Metrics::kMetricPortalAttemptsSuffix, technology()),
result.num_attempts,
Metrics::kMetricPortalAttemptsMin,
Metrics::kMetricPortalAttemptsMax,
Metrics::kMetricPortalAttemptsNumBuckets);
StartConnectionDiagnosticsAfterPortalDetection(result);
// TODO(zqiu): Only support fallback DNS server for IPv4 for now.
if (connection_->IsIPv6()) {
return;
}
// Perform fallback DNS test if the portal failure is DNS related.
// The test will send a DNS request to Google's DNS server to determine
// if the DNS failure is due to bad DNS server settings.
if ((portal_status == Metrics::kPortalResultDNSFailure) ||
(portal_status == Metrics::kPortalResultDNSTimeout)) {
StartDNSTest(vector<string>(std::begin(kFallbackDnsServers),
std::end(kFallbackDnsServers)),
false,
Bind(&Device::FallbackDNSResultCallback,
weak_ptr_factory_.GetWeakPtr()));
}
}
}
string Device::GetSelectedServiceRpcIdentifier(Error* /*error*/) {
if (!selected_service_) {
return "/";
}
return selected_service_->GetRpcIdentifier();
}
vector<string> Device::AvailableIPConfigs(Error* /*error*/) {
vector<string> ipconfigs;
if (ipconfig_) {
ipconfigs.push_back(ipconfig_->GetRpcIdentifier());
}
if (ip6config_) {
ipconfigs.push_back(ip6config_->GetRpcIdentifier());
}
if (dhcpv6_config_) {
ipconfigs.push_back(dhcpv6_config_->GetRpcIdentifier());
}
return ipconfigs;
}
uint64_t Device::GetLinkMonitorResponseTime(Error* error) {
if (!link_monitor_.get()) {
// It is not strictly an error that the link monitor does not
// exist, but returning an error here allows the GetProperties
// call in our Adaptor to omit this parameter.
error->Populate(Error::kNotFound, "Device is not running LinkMonitor");
return 0;
}
return link_monitor_->GetResponseTimeMilliseconds();
}
uint64_t Device::GetReceiveByteCount() {
uint64_t rx_byte_count = 0, tx_byte_count = 0;
manager_->device_info()->GetByteCounts(
interface_index_, &rx_byte_count, &tx_byte_count);
return rx_byte_count - receive_byte_offset_;
}
uint64_t Device::GetTransmitByteCount() {
uint64_t rx_byte_count = 0, tx_byte_count = 0;
manager_->device_info()->GetByteCounts(
interface_index_, &rx_byte_count, &tx_byte_count);
return tx_byte_count - transmit_byte_offset_;
}
uint64_t Device::GetReceiveByteCountProperty(Error* /*error*/) {
return GetReceiveByteCount();
}
uint64_t Device::GetTransmitByteCountProperty(Error* /*error*/) {
return GetTransmitByteCount();
}
bool Device::IsUnderlyingDeviceEnabled() const {
return false;
}
// callback
void Device::OnEnabledStateChanged(const ResultCallback& callback,
const Error& error) {
SLOG(this, 2) << __func__
<< " (target: " << enabled_pending_ << ","
<< " success: " << error.IsSuccess() << ")"
<< " on " << link_name_;
if (error.IsSuccess()) {
enabled_ = enabled_pending_;
if (!enabled_ && ShouldBringNetworkInterfaceDownAfterDisabled()) {
BringNetworkInterfaceDown();
}
manager_->UpdateEnabledTechnologies();
adaptor_->EmitBoolChanged(kPoweredProperty, enabled_);
}
enabled_pending_ = enabled_;
if (!callback.is_null())
callback.Run(error);
}
void Device::SetEnabled(bool enable) {
SLOG(this, 2) << __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) {
SetEnabledChecked(enable, false, error, callback);
}
void Device::SetEnabledPersistent(bool enable,
Error* error,
const ResultCallback& callback) {
SetEnabledChecked(enable, true, error, callback);
}
void Device::SetEnabledChecked(bool enable,
bool persist,
Error* error,
const ResultCallback& callback) {
DCHECK(error);
SLOG(this, 2) << "Device " << link_name_ << " "
<< (enable ? "starting" : "stopping");
if (enable && manager_->IsTechnologyProhibited(technology())) {
error->Populate(Error::kPermissionDenied, "The " +
Technology::NameFromIdentifier(technology()) +
" 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;
}
LOG(INFO) << "Already in desired enable state.";
error->Reset();
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) {
enabled_pending_ = enable;
EnabledStateChangedCallback chained_callback =
Bind(&Device::OnEnabledStateChanged,
weak_ptr_factory_.GetWeakPtr(), on_enable_complete);
if (enable) {
running_ = true;
Start(error, chained_callback);
} else {
running_ = false;
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));
}
bool Device::ResolvePeerMacAddress(const string& input,
string* output,
Error* error) {
if (!MakeHardwareAddressFromString(input).empty()) {
// Input is already a MAC address.
*output = input;
return true;
}
IPAddress ip_address(IPAddress::kFamilyIPv4);
if (!ip_address.SetAddressFromString(input)) {
Error::PopulateAndLog(FROM_HERE, error, Error::kInvalidArguments,
"Peer is neither an IP Address nor a MAC address");
return false;
}
// Peer address was specified as an IP address which we need to resolve.
const DeviceInfo* device_info = manager()->device_info();
if (!device_info->HasDirectConnectivityTo(interface_index_, ip_address)) {
Error::PopulateAndLog(FROM_HERE, error, Error::kInvalidArguments,
"IP address is not local to this interface");
return false;
}
ByteString mac_address;
if (device_info->GetMACAddressOfPeer(interface_index_,
ip_address,
&mac_address)) {
*output = MakeStringFromHardwareAddress(
vector<uint8_t>(mac_address.GetConstData(),
mac_address.GetConstData() +
mac_address.GetLength()));
SLOG(this, 2) << "ARP cache lookup returned peer: " << *output;
return true;
}
Icmp pinger;
if (!pinger.Start(ip_address, interface_index_) ||
!pinger.TransmitEchoRequest(1, 1)) {
Error::PopulateAndLog(FROM_HERE, error, Error::kOperationFailed,
"Failed to send ICMP request to peer to setup ARP");
} else {
// ARP request was transmitted successfully, address resolution is still
// pending.
error->Populate(Error::kInProgress,
"Peer MAC address was not found in the ARP cache, "
"but an ARP request was sent to find it. "
"Please try again.");
}
return false;
}
// static
vector<uint8_t> Device::MakeHardwareAddressFromString(
const string& address_string) {
string address_nosep;
base::RemoveChars(address_string, ":", &address_nosep);
vector<uint8_t> address_bytes;
base::HexStringToBytes(address_nosep, &address_bytes);
if (address_bytes.size() != kHardwareAddressLength) {
return vector<uint8_t>();
}
return address_bytes;
}
// static
string Device::MakeStringFromHardwareAddress(
const vector<uint8_t>& address_bytes) {
CHECK_EQ(kHardwareAddressLength, address_bytes.size());
return 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);
}
} // namespace shill