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// Copyright (c) 2012 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.
#ifndef SHILL_DEVICE_
#define SHILL_DEVICE_
#include <string>
#include <vector>
#include <base/basictypes.h>
#include <base/memory/ref_counted.h>
#include <base/memory/scoped_ptr.h>
#include <base/memory/weak_ptr.h>
#include <gtest/gtest_prod.h> // for FRIEND_TEST
#include "shill/adaptor_interfaces.h"
#include "shill/callbacks.h"
#include "shill/event_dispatcher.h"
#include "shill/ip_address.h"
#include "shill/ipconfig.h"
#include "shill/portal_detector.h"
#include "shill/property_store.h"
#include "shill/refptr_types.h"
#include "shill/service.h"
#include "shill/technology.h"
namespace shill {
class ControlInterface;
class DHCPProvider;
class DeviceAdaptorInterface;
class Endpoint;
class Error;
class EventDispatcher;
class Manager;
class Metrics;
class RTNLHandler;
// Device superclass. Individual network interfaces types will inherit from
// this class.
class Device : public base::RefCounted<Device> {
public:
// A constructor for the Device object
Device(ControlInterface *control_interface,
EventDispatcher *dispatcher,
Metrics *metrics,
Manager *manager,
const std::string &link_name,
const std::string &address,
int interface_index,
Technology::Identifier technology);
virtual ~Device();
// Enable or disable the device.
virtual void SetEnabled(bool enable);
// Enable or disable the device, and save the setting in the profile.
// The setting is persisted before the enable or disable operation
// starts, so that even if it fails, the user's intent is still recorded
// for the next time shill restarts.
virtual void SetEnabledPersistent(bool enable,
Error *error,
const ResultCallback &callback);
// Returns true if the underlying device reports that it is already enabled.
// Used when the device is registered with the Manager, so that shill can
// sync its state/ with the true state of the device. The default is to
// report false.
virtual bool IsUnderlyingDeviceEnabled() const;
// TODO(gauravsh): We do not really need this since technology() can be used
// to get a device's technology for direct comparison.
// Base method always returns false.
virtual bool TechnologyIs(const Technology::Identifier type) const;
virtual void LinkEvent(unsigned flags, unsigned change);
// The default implementation sets |error| to kNotSupported.
virtual void Scan(Error *error);
virtual void RegisterOnNetwork(const std::string &network_id, Error *error,
const ResultCallback &callback);
virtual void RequirePIN(const std::string &pin, bool require,
Error *error, const ResultCallback &callback);
virtual void EnterPIN(const std::string &pin,
Error *error, const ResultCallback &callback);
virtual void UnblockPIN(const std::string &unblock_code,
const std::string &pin,
Error *error, const ResultCallback &callback);
virtual void ChangePIN(const std::string &old_pin,
const std::string &new_pin,
Error *error, const ResultCallback &callback);
virtual void DisableIPv6();
virtual void EnableIPv6();
virtual void EnableIPv6Privacy();
// Request the removal of reverse-path filtering for this interface.
// This will allow packets destined for this interface to be accepted,
// even if this is not the default route for such a packet to arrive.
virtual void DisableReversePathFilter();
// Request reverse-path filtering for this interface.
virtual void EnableReversePathFilter();
// Returns true if the selected service on the device (if any) is connected.
// Returns false if there is no selected service, or if the selected service
// is not connected.
bool IsConnected() const;
// Returns true if the selected service on the device (if any) is connected
// and matches the passed-in argument |service|. Returns false if there is
// no connected service, or if it does not match |service|.
virtual bool IsConnectedToService(const ServiceRefPtr &service) const;
// Restart the portal detection process on a connected device. This is
// useful if the properties on the connected service have changed in a
// way that may affect the decision to run portal detection at all.
// Returns true if portal detection was started.
virtual bool RestartPortalDetection();
// Requests that portal detection be done, if this device has the default
// connection. Returns true if portal detection was started.
virtual bool RequestPortalDetection();
std::string GetRpcIdentifier();
std::string GetStorageIdentifier();
const std::string &address() const { return hardware_address_; }
const std::string &link_name() const { return link_name_; }
int interface_index() const { return interface_index_; }
const ConnectionRefPtr &connection() const { return connection_; }
bool enabled() const { return enabled_; }
bool enabled_persistent() const { return enabled_persistent_; }
virtual Technology::Identifier technology() const { return technology_; }
std::string GetTechnologyString(Error *error);
const IPConfigRefPtr &ipconfig() const { return ipconfig_; }
void set_ipconfig(const IPConfigRefPtr &config) { ipconfig_ = config; }
const std::string &FriendlyName() const;
// Returns a string that is guaranteed to uniquely identify this Device
// instance.
const std::string &UniqueName() const;
PropertyStore *mutable_store() { return &store_; }
const PropertyStore &store() const { return store_; }
RTNLHandler *rtnl_handler() { return rtnl_handler_; }
EventDispatcher *dispatcher() const { return dispatcher_; }
// Load configuration for the device from |storage|. This may include
// instantiating non-visible services for which configuration has been
// stored.
virtual bool Load(StoreInterface *storage);
// Save configuration for the device to |storage|.
virtual bool Save(StoreInterface *storage);
void set_dhcp_provider(DHCPProvider *provider) { dhcp_provider_ = provider; }
DeviceAdaptorInterface *adaptor() const { return adaptor_.get(); }
protected:
FRIEND_TEST(CellularTest, ModemStateChangeDisable);
FRIEND_TEST(ConnectionTest, OnRouteQueryResponse);
FRIEND_TEST(DeviceTest, AcquireIPConfig);
FRIEND_TEST(DeviceTest, DestroyIPConfig);
FRIEND_TEST(DeviceTest, DestroyIPConfigNULL);
FRIEND_TEST(DeviceTest, GetProperties);
FRIEND_TEST(DeviceTest, Save);
FRIEND_TEST(DeviceTest, SelectedService);
FRIEND_TEST(DeviceTest, SetServiceConnectedState);
FRIEND_TEST(DeviceTest, Start);
FRIEND_TEST(DeviceTest, Stop);
FRIEND_TEST(ManagerTest, DeviceRegistrationAndStart);
FRIEND_TEST(ManagerTest, ConnectedTechnologies);
FRIEND_TEST(ManagerTest, DefaultTechnology);
FRIEND_TEST(ManagerTest, EnableTechnology);
FRIEND_TEST(ManagerTest, DisableTechnology);
FRIEND_TEST(WiFiMainTest, Connect);
// Each device must implement this method to do the work needed to
// enable the device to operate for establishing network connections.
// The |error| argument, if not NULL,
// will refer to an Error that starts out with the value
// Error::kOperationInitiated. This reflects the assumption that
// enable (and disable) operations will usually be non-blocking,
// and their completion will be indicated by means of an asynchronous
// reply sometime later. There are two circumstances in which a
// device's Start() method may overwrite |error|:
//
// 1. If an early failure is detected, such that the non-blocking
// part of the operation never takes place, then |error| should
// be set to the appropriate value corresponding to the type
// of failure. This is the "immediate failure" case.
// 2. If the device is enabled without performing any non-blocking
// steps, then |error| should be Reset, i.e., its value set
// to Error::kSuccess. This is the "immediate success" case.
//
// In these two cases, because completion is immediate, |callback|
// is not used. If neither of these two conditions holds, then |error|
// should not be modified, and |callback| should be passed to the
// method that will initiate the non-blocking operation.
virtual void Start(Error *error,
const EnabledStateChangedCallback &callback) = 0;
// Each device must implement this method to do the work needed to
// disable the device, i.e., clear any running state, and make the
// device no longer capable of establishing network connections.
// The discussion for Start() regarding the use of |error| and
// |callback| apply to Stop() as well.
virtual void Stop(Error *error,
const EnabledStateChangedCallback &callback) = 0;
// The EnabledStateChangedCallback that gets passed to the device's
// Start() and Stop() methods is bound to this method. |callback|
// is the callback that was passed to SetEnabled().
void OnEnabledStateChanged(const ResultCallback &callback,
const Error &error);
// If there's an IP configuration in |ipconfig_|, releases the IP address and
// destroys the configuration instance.
void DestroyIPConfig();
// Creates a new DHCP IP configuration instance, stores it in |ipconfig_| and
// requests a new IP configuration. Saves the DHCP lease to the generic
// lease filename based on the interface name. Registers a callback to
// IPConfigUpdatedCallback on IP configuration changes. Returns true if the IP
// request was successfully sent.
bool AcquireIPConfig();
// Creates a new DHCP IP configuration instance, stores it in |ipconfig_| and
// requests a new IP configuration. Saves the DHCP lease to a filename
// based on the passed-in |lease_name|. Registers a callback to
// IPConfigUpdatedCallback on IP configuration changes. Returns true if the IP
// request was successfully sent.
bool AcquireIPConfigWithLeaseName(const std::string &lease_name);
// Callback invoked on every IP configuration update.
void OnIPConfigUpdated(const IPConfigRefPtr &ipconfig, bool success);
// Maintain connection state (Routes, IP Addresses and DNS) in the OS.
void CreateConnection();
// Remove connection state
void DestroyConnection();
// Selects a service to be "current" -- i.e. link-state or configuration
// events that happen to the device are attributed to this service.
void SelectService(const ServiceRefPtr &service);
// Set the state of the selected service
void SetServiceState(Service::ConnectState state);
// Set the failure of the selected service (implicitly sets the state to
// "failure")
void SetServiceFailure(Service::ConnectFailure failure_state);
// Records the failure mode and time of the selected service, and
// sets the Service state of the selected service to "Idle".
// Avoids showing a failure mole in the UI.
void SetServiceFailureSilent(Service::ConnectFailure failure_state);
// Called by the Portal Detector whenever a trial completes. Device
// subclasses that choose unique mappings from portal results to connected
// states can override this method in order to do so.
virtual void PortalDetectorCallback(const PortalDetector::Result &result);
// Initiate portal detection, if enabled for this device type.
bool StartPortalDetection();
// Stop portal detection if it is running.
void StopPortalDetection();
// Set the state of the selected service, with checks to make sure
// the service is already in a connected state before doing so.
void SetServiceConnectedState(Service::ConnectState state);
const ServiceRefPtr &selected_service() const { return selected_service_; }
void HelpRegisterDerivedString(
const std::string &name,
std::string(Device::*get)(Error *),
void(Device::*set)(const std::string&, Error *));
void HelpRegisterDerivedStrings(
const std::string &name,
Strings(Device::*get)(Error *error),
void(Device::*set)(const Strings &value, Error *error));
void HelpRegisterConstDerivedRpcIdentifiers(
const std::string &name,
RpcIdentifiers(Device::*get)(Error *));
// Property getters reserved for subclasses
ControlInterface *control_interface() const { return control_interface_; }
Metrics *metrics() const { return metrics_; }
Manager *manager() const { return manager_; }
bool running() const { return running_; }
private:
friend class DeviceAdaptorInterface;
friend class DevicePortalDetectionTest;
friend class DeviceTest;
friend class CellularTest;
friend class CellularCapabilityTest;
friend class WiFiMainTest;
static const char kIPFlagTemplate[];
static const char kIPFlagVersion4[];
static const char kIPFlagVersion6[];
static const char kIPFlagDisableIPv6[];
static const char kIPFlagUseTempAddr[];
static const char kIPFlagUseTempAddrUsedAndDefault[];
static const char kIPFlagReversePathFilter[];
static const char kIPFlagReversePathFilterEnabled[];
static const char kIPFlagReversePathFilterLooseMode[];
static const char kStoragePowered[];
static const char kStorageIPConfigs[];
// Configure static IP address parameters if the service provides them.
void ConfigureStaticIPTask();
void SetEnabledInternal(bool enable, bool persist,
Error *error, const ResultCallback &callback);
// Right now, Devices reference IPConfigs directly when persisted to disk
// It's not clear that this makes sense long-term, but that's how it is now.
// This call generates a string in the right format for this persisting.
// |suffix| is injected into the storage identifier used for the configs.
std::string SerializeIPConfigs(const std::string &suffix);
// Set an IP configuration flag on the device. |ip_version| should be
// "ipv6" or "ipv4". |flag| should be the name of the flag to be set
// and |value| is what this flag should be set to.
bool SetIPFlag(IPAddress::Family family, const std::string &flag,
const std::string &value);
std::vector<std::string> AvailableIPConfigs(Error *error);
std::string GetRpcConnectionIdentifier();
// |enabled_persistent_| is the value of the Powered property, as
// read from the profile. If it is not found in the profile, it
// defaults to true. |enabled_| reflects the real-time state of
// the device, i.e., enabled or disabled. |enabled_pending_| reflects
// the target state of the device while an enable or disable operation
// is occurring.
//
// Some typical sequences for these state variables are shown below.
//
// Shill starts up, profile has been read:
// |enabled_persistent_|=true |enabled_|=false |enabled_pending_|=false
//
// Shill acts on the value of |enabled_persistent_|, calls SetEnabled(true):
// |enabled_persistent_|=true |enabled_|=false |enabled_pending_|=true
//
// SetEnabled completes successfully, device is enabled:
// |enabled_persistent_|=true |enabled_|=true |enabled_pending_|=true
//
// User presses "Disable" button, SetEnabled(false) is called:
// |enabled_persistent_|=false |enabled_|=true |enabled_pending_|=false
//
// SetEnabled completes successfully, device is disabled:
// |enabled_persistent_|=false |enabled_|=false |enabled_pending_|=false
bool enabled_;
bool enabled_persistent_;
bool enabled_pending_;
// Other properties
bool reconnect_;
const std::string hardware_address_;
PropertyStore store_;
const int interface_index_;
bool running_; // indicates whether the device is actually in operation
const std::string link_name_;
const std::string unique_id_;
ControlInterface *control_interface_;
EventDispatcher *dispatcher_;
Metrics *metrics_;
Manager *manager_;
IPConfigRefPtr ipconfig_;
ConnectionRefPtr connection_;
base::WeakPtrFactory<Device> weak_ptr_factory_;
scoped_ptr<DeviceAdaptorInterface> adaptor_;
scoped_ptr<PortalDetector> portal_detector_;
base::Callback<void(const PortalDetector::Result &)>
portal_detector_callback_;
Technology::Identifier technology_;
// The number of portal detection attempts from Connected to Online state.
// This includes all failure/timeout attempts and the final successful
// attempt.
int portal_attempts_to_online_;
// Maintain a reference to the connected / connecting service
ServiceRefPtr selected_service_;
// Cache singleton pointers for performance and test purposes.
DHCPProvider *dhcp_provider_;
RTNLHandler *rtnl_handler_;
DISALLOW_COPY_AND_ASSIGN(Device);
};
} // namespace shill
#endif // SHILL_DEVICE_