1 // 2 // Copyright (C) 2015 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_CLIENT_LIBRARY_INCLUDE_UPDATE_ENGINE_CLIENT_H_ 18 #define UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_UPDATE_ENGINE_CLIENT_H_ 19 20 #include <cstdint> 21 #include <memory> 22 #include <string> 23 24 #include "update_engine/status_update_handler.h" 25 #include "update_engine/update_status.h" 26 27 namespace update_engine { 28 29 class UpdateEngineClient { 30 public: 31 static std::unique_ptr<UpdateEngineClient> CreateInstance(); 32 33 virtual ~UpdateEngineClient() = default; 34 35 // Force the update_engine to attempt an update. 36 // |app_version| 37 // Attempt to update to this version. An empty string indicates that 38 // update engine should pick the most recent image on the current channel. 39 // |omaha_url| 40 // Force update_engine to look for updates from the given server. Passing 41 // empty indicates update_engine should get this parameter from its 42 // config. Note that update_engine will ignore this parameter in 43 // production mode to avoid pulling untrusted updates. 44 // |at_user_request| 45 // This update was directly requested by the user. 46 virtual bool AttemptUpdate(const std::string& app_version, 47 const std::string& omaha_url, 48 bool at_user_request) = 0; 49 50 // Returns the current status of the Update Engine. 51 // 52 // |out_last_checked_time| 53 // the last time the update engine checked for an update in seconds since 54 // the epoc. 55 // |out_progress| 56 // when downloading an update, this is calculated as 57 // (number of bytes received) / (total bytes). 58 // |out_update_status| 59 // See update_status.h. 60 // |out_new_version| 61 // string version of the new system image. 62 // |out_new_size| 63 // number of bytes in the new system image. 64 virtual bool GetStatus(int64_t* out_last_checked_time, 65 double* out_progress, 66 UpdateStatus* out_update_status, 67 std::string* out_new_version, 68 int64_t* out_new_size) const = 0; 69 70 // Getter and setter for the updates over cellular connections. 71 virtual bool SetUpdateOverCellularPermission(bool allowed) = 0; 72 virtual bool GetUpdateOverCellularPermission(bool* allowed) const = 0; 73 74 // Getter and setter for the updates from P2P permission. 75 virtual bool SetP2PUpdatePermission(bool enabled) = 0; 76 virtual bool GetP2PUpdatePermission(bool* enabled) const = 0; 77 78 // Attempt a rollback. Set 'powerwash' to reset the device while rolling 79 // back. 80 virtual bool Rollback(bool powerwash) = 0; 81 82 // Get the rollback partition if available. Gives empty string if not. 83 virtual bool GetRollbackPartition(std::string* rollback_partition) const = 0; 84 85 // Reboot the system if needed. 86 virtual void RebootIfNeeded() = 0; 87 88 // Get the previous version 89 virtual bool GetPrevVersion(std::string* prev_version) const = 0; 90 91 // Resets the status of the Update Engine 92 virtual bool ResetStatus() = 0; 93 94 // Changes the current channel of the device to the target channel. 95 virtual bool SetTargetChannel(const std::string& target_channel, 96 bool allow_powerwash) = 0; 97 98 // Get the channel the device will switch to on reboot. 99 virtual bool GetTargetChannel(std::string* out_channel) const = 0; 100 101 // Get the channel the device is currently on. 102 virtual bool GetChannel(std::string* out_channel) const = 0; 103 104 // Handle status updates. The handler must exist until the client is 105 // destroyed or UnregisterStatusUpdateHandler is called for it. Its IPCError 106 // method will be called if the handler could not be registered. Otherwise 107 // its HandleStatusUpdate method will be called every time update_engine's 108 // status changes. Will always report the status on registration to prevent 109 // race conditions. 110 virtual bool RegisterStatusUpdateHandler(StatusUpdateHandler* handler) = 0; 111 112 // Unregister a status update handler 113 virtual bool UnregisterStatusUpdateHandler(StatusUpdateHandler* handler) = 0; 114 115 // Get the last UpdateAttempt error code. 116 virtual bool GetLastAttemptError(int32_t* last_attempt_error) const = 0; 117 118 protected: 119 // Use CreateInstance(). 120 UpdateEngineClient() = default; 121 122 private: 123 UpdateEngineClient(const UpdateEngineClient&) = delete; 124 void operator=(const UpdateEngineClient&) = delete; 125 }; // class UpdateEngineClient 126 127 } // namespace update_engine 128 129 #endif // UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_UPDATE_ENGINE_CLIENT_H_ 130