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1 //
2 // Copyright (C) 2013 The Android Open Source Project
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 //      http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16 
17 #ifndef UPDATE_ENGINE_REAL_SYSTEM_STATE_H_
18 #define UPDATE_ENGINE_REAL_SYSTEM_STATE_H_
19 
20 #include "update_engine/system_state.h"
21 
22 #include <memory>
23 #include <set>
24 
25 #include <debugd/dbus-proxies.h>
26 #include <metrics/metrics_library.h>
27 #include <policy/device_policy.h>
28 #include <power_manager/dbus-proxies.h>
29 #include <session_manager/dbus-proxies.h>
30 
31 #include "update_engine/certificate_checker.h"
32 #include "update_engine/common/boot_control_interface.h"
33 #include "update_engine/common/clock.h"
34 #include "update_engine/common/hardware_interface.h"
35 #include "update_engine/common/prefs.h"
36 #include "update_engine/connection_manager.h"
37 #include "update_engine/daemon_state_interface.h"
38 #include "update_engine/p2p_manager.h"
39 #include "update_engine/payload_state.h"
40 #include "update_engine/shill_proxy.h"
41 #include "update_engine/update_attempter.h"
42 #include "update_engine/update_manager/update_manager.h"
43 #include "update_engine/weave_service_interface.h"
44 
45 namespace chromeos_update_engine {
46 
47 // A real implementation of the SystemStateInterface which is
48 // used by the actual product code.
49 class RealSystemState : public SystemState, public DaemonStateInterface {
50  public:
51   // Constructs all system objects that do not require separate initialization;
52   // see Initialize() below for the remaining ones.
53   explicit RealSystemState(const scoped_refptr<dbus::Bus>& bus);
54   ~RealSystemState() override;
55 
56   // Initializes and sets systems objects that require an initialization
57   // separately from construction. Returns |true| on success.
58   bool Initialize();
59 
60   // DaemonStateInterface overrides.
61   // Start the periodic update attempts. Must be called at the beginning of the
62   // program to start the periodic update check process.
63   bool StartUpdater() override;
64 
65   void AddObserver(ServiceObserverInterface* observer) override;
66   void RemoveObserver(ServiceObserverInterface* observer) override;
service_observers()67   const std::set<ServiceObserverInterface*>& service_observers() override {
68     CHECK(update_attempter_.get());
69     return update_attempter_->service_observers();
70   }
71 
72   // SystemState overrides.
set_device_policy(const policy::DevicePolicy * device_policy)73   inline void set_device_policy(
74       const policy::DevicePolicy* device_policy) override {
75     device_policy_ = device_policy;
76   }
77 
device_policy()78   inline const policy::DevicePolicy* device_policy() override {
79     return device_policy_;
80   }
81 
boot_control()82   inline BootControlInterface* boot_control() override {
83     return boot_control_.get();
84   }
85 
clock()86   inline ClockInterface* clock() override { return &clock_; }
87 
connection_manager()88   inline ConnectionManagerInterface* connection_manager() override {
89     return &connection_manager_;
90   }
91 
hardware()92   inline HardwareInterface* hardware() override { return hardware_.get(); }
93 
metrics_lib()94   inline MetricsLibraryInterface* metrics_lib() override {
95     return &metrics_lib_;
96   }
97 
prefs()98   inline PrefsInterface* prefs() override { return prefs_.get(); }
99 
powerwash_safe_prefs()100   inline PrefsInterface* powerwash_safe_prefs() override {
101     return powerwash_safe_prefs_.get();
102   }
103 
payload_state()104   inline PayloadStateInterface* payload_state() override {
105     return &payload_state_;
106   }
107 
update_attempter()108   inline UpdateAttempter* update_attempter() override {
109     return update_attempter_.get();
110   }
111 
weave_service()112   inline WeaveServiceInterface* weave_service() override {
113     return weave_service_.get();
114   }
115 
request_params()116   inline OmahaRequestParams* request_params() override {
117     return &request_params_;
118   }
119 
p2p_manager()120   inline P2PManager* p2p_manager() override { return p2p_manager_.get(); }
121 
update_manager()122   inline chromeos_update_manager::UpdateManager* update_manager() override {
123     return update_manager_.get();
124   }
125 
power_manager_proxy()126   inline org::chromium::PowerManagerProxyInterface* power_manager_proxy()
127       override {
128     return &power_manager_proxy_;
129   }
130 
system_rebooted()131   inline bool system_rebooted() override { return system_rebooted_; }
132 
133  private:
134   // Real DBus proxies using the DBus connection.
135   org::chromium::debugdProxy debugd_proxy_;
136   org::chromium::PowerManagerProxy power_manager_proxy_;
137   org::chromium::SessionManagerInterfaceProxy session_manager_proxy_;
138   ShillProxy shill_proxy_;
139   LibCrosProxy libcros_proxy_;
140 
141   // Interface for the clock.
142   std::unique_ptr<BootControlInterface> boot_control_;
143 
144   // Interface for the clock.
145   Clock clock_;
146 
147   // The latest device policy object from the policy provider.
148   const policy::DevicePolicy* device_policy_{nullptr};
149 
150   // The connection manager object that makes download decisions depending on
151   // the current type of connection.
152   ConnectionManager connection_manager_{&shill_proxy_, this};
153 
154   // Interface for the hardware functions.
155   std::unique_ptr<HardwareInterface> hardware_;
156 
157   // The Metrics Library interface for reporting UMA stats.
158   MetricsLibrary metrics_lib_;
159 
160   // Interface for persisted store.
161   std::unique_ptr<PrefsInterface> prefs_;
162 
163   // Interface for persisted store that persists across powerwashes.
164   std::unique_ptr<PrefsInterface> powerwash_safe_prefs_;
165 
166   // All state pertaining to payload state such as response, URL, backoff
167   // states.
168   PayloadState payload_state_;
169 
170   // OpenSSLWrapper and CertificateChecker used for checking SSL certificates.
171   OpenSSLWrapper openssl_wrapper_;
172   std::unique_ptr<CertificateChecker> certificate_checker_;
173 
174   // Pointer to the update attempter object.
175   std::unique_ptr<UpdateAttempter> update_attempter_;
176 
177   // Common parameters for all Omaha requests.
178   OmahaRequestParams request_params_{this};
179 
180   std::unique_ptr<P2PManager> p2p_manager_;
181 
182   std::unique_ptr<WeaveServiceInterface> weave_service_;
183 
184   std::unique_ptr<chromeos_update_manager::UpdateManager> update_manager_;
185 
186   policy::PolicyProvider policy_provider_;
187 
188   // If true, this is the first instance of the update engine since the system
189   // rebooted. Important for tracking whether you are running instance of the
190   // update engine on first boot or due to a crash/restart.
191   bool system_rebooted_{false};
192 };
193 
194 }  // namespace chromeos_update_engine
195 
196 #endif  // UPDATE_ENGINE_REAL_SYSTEM_STATE_H_
197