1aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// 2aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// Copyright (C) 2014 The Android Open Source Project 3aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// 4aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// Licensed under the Apache License, Version 2.0 (the "License"); 5aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// you may not use this file except in compliance with the License. 6aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// You may obtain a copy of the License at 7aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// 8aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// http://www.apache.org/licenses/LICENSE-2.0 9aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// 10aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// Unless required by applicable law or agreed to in writing, software 11aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// distributed under the License is distributed on an "AS IS" BASIS, 12aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// See the License for the specific language governing permissions and 14aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// limitations under the License. 15aea4c1cea20dda7ae7e85fc8924a2d784f70d806Alex Deymo// 16a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 17a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold#include "update_engine/update_manager/default_policy.h" 18a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 19a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnoldnamespace { 20a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 21a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// A fixed minimum interval between consecutive allowed update checks. This 22a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// needs to be long enough to prevent busywork and/or DDoS attacks on Omaha, but 23a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// at the same time short enough to allow the machine to update itself 24a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// reasonably soon. 25a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnoldconst int kCheckIntervalInSeconds = 15 * 60; 26a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 27a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold} // namespace 28a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 29a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnoldnamespace chromeos_update_manager { 30a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 31a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad ArnoldDefaultPolicy::DefaultPolicy(chromeos_update_engine::ClockInterface* clock) 32a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold : clock_(clock), aux_state_(new DefaultPolicyState()) {} 33a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 34a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad ArnoldEvalStatus DefaultPolicy::UpdateCheckAllowed( 35a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold EvaluationContext* ec, State* state, std::string* error, 36a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold UpdateCheckParams* result) const { 37a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold result->updates_enabled = true; 38a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold result->target_channel.clear(); 39d4b303246eae1fcd0b4820657f1d787e8238146fGilad Arnold result->target_version_prefix.clear(); 4044dc3bfd45eaddc1e7b586f8839babe4540418b5Gilad Arnold result->is_interactive = false; 41a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 42a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold // Ensure that the minimum interval is set. If there's no clock, this defaults 43a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold // to always allowing the update. 44a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold if (!aux_state_->IsLastCheckAllowedTimeSet() || 45a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold ec->IsMonotonicTimeGreaterThan( 46a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold aux_state_->last_check_allowed_time() + 47a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold base::TimeDelta::FromSeconds(kCheckIntervalInSeconds))) { 48a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold if (clock_) 49a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold aux_state_->set_last_check_allowed_time(clock_->GetMonotonicTime()); 50a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold return EvalStatus::kSucceeded; 51a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold } 52a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 53a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold return EvalStatus::kAskMeAgainLater; 54a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold} 55a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 56dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad ArnoldEvalStatus DefaultPolicy::UpdateCanStart( 57dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold EvaluationContext* ec, 58dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold State* state, 59dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold std::string* error, 60dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold UpdateDownloadParams* result, 61d78caf9baf2026a356130f4754af2c504f423945Gilad Arnold const UpdateState update_state) const { 62dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->update_can_start = true; 63dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->cannot_start_reason = UpdateCannotStartReason::kUndefined; 64dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->download_url_idx = 0; 6514a9e70709b4cda5afc97ac6219bc660810b2077Gilad Arnold result->download_url_allowed = true; 66dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->download_url_num_errors = 0; 67b2f9919a0e4a77dd885625cb52ff7322974bd338Gilad Arnold result->p2p_downloading_allowed = false; 68b2f9919a0e4a77dd885625cb52ff7322974bd338Gilad Arnold result->p2p_sharing_allowed = false; 69dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->do_increment_failures = false; 70dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->backoff_expiry = base::Time(); 71dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->scatter_wait_period = base::TimeDelta(); 72dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->scatter_check_threshold = 0; 73dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold return EvalStatus::kSucceeded; 74dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold} 75dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold 76dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad ArnoldEvalStatus DefaultPolicy::UpdateDownloadAllowed( 77dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold EvaluationContext* ec, 78dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold State* state, 79dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold std::string* error, 80dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold bool* result) const { 81dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold *result = true; 82dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold return EvalStatus::kSucceeded; 83dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold} 84dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold 8578ecbfc254c574e52cfe63310a801381a0035c43Gilad ArnoldEvalStatus DefaultPolicy::P2PEnabled( 8678ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold EvaluationContext* ec, 8778ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold State* state, 8878ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold std::string* error, 8978ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold bool* result) const { 9078ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold *result = false; 9178ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold return EvalStatus::kSucceeded; 9278ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold} 9378ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold 9478ecbfc254c574e52cfe63310a801381a0035c43Gilad ArnoldEvalStatus DefaultPolicy::P2PEnabledChanged( 9578ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold EvaluationContext* ec, 9678ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold State* state, 9778ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold std::string* error, 9878ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold bool* result, 9978ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold bool prev_result) const { 10078ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold // This policy will always prohibit P2P, so this is signaling to the caller 10178ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold // that the decision is final (because the current value is the same as the 10278ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold // previous one) and there's no need to issue another call. 10378ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold *result = false; 10478ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold return EvalStatus::kSucceeded; 10578ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold} 10678ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold 107a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold} // namespace chromeos_update_manager 108