default_policy.cc revision 78ecbfc254c574e52cfe63310a801381a0035c43
1a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// Copyright (c) 2014 The Chromium OS Authors. All rights reserved. 2a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// Use of this source code is governed by a BSD-style license that can be 3a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// found in the LICENSE file. 4a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 5a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold#include "update_engine/update_manager/default_policy.h" 6a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 7a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnoldnamespace { 8a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 9a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// A fixed minimum interval between consecutive allowed update checks. This 10a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// needs to be long enough to prevent busywork and/or DDoS attacks on Omaha, but 11a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// at the same time short enough to allow the machine to update itself 12a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold// reasonably soon. 13a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnoldconst int kCheckIntervalInSeconds = 15 * 60; 14a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 15a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold} // namespace 16a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 17a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnoldnamespace chromeos_update_manager { 18a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 19a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad ArnoldDefaultPolicy::DefaultPolicy(chromeos_update_engine::ClockInterface* clock) 20a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold : clock_(clock), aux_state_(new DefaultPolicyState()) {} 21a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 22a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad ArnoldEvalStatus DefaultPolicy::UpdateCheckAllowed( 23a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold EvaluationContext* ec, State* state, std::string* error, 24a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold UpdateCheckParams* result) const { 25a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold result->updates_enabled = true; 26a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold result->target_channel.clear(); 27d4b303246eae1fcd0b4820657f1d787e8238146fGilad Arnold result->target_version_prefix.clear(); 2844dc3bfd45eaddc1e7b586f8839babe4540418b5Gilad Arnold result->is_interactive = false; 29a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 30a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold // Ensure that the minimum interval is set. If there's no clock, this defaults 31a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold // to always allowing the update. 32a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold if (!aux_state_->IsLastCheckAllowedTimeSet() || 33a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold ec->IsMonotonicTimeGreaterThan( 34a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold aux_state_->last_check_allowed_time() + 35a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold base::TimeDelta::FromSeconds(kCheckIntervalInSeconds))) { 36a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold if (clock_) 37a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold aux_state_->set_last_check_allowed_time(clock_->GetMonotonicTime()); 38a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold return EvalStatus::kSucceeded; 39a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold } 40a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 41a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold return EvalStatus::kAskMeAgainLater; 42a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold} 43a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold 44dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad ArnoldEvalStatus DefaultPolicy::UpdateCanStart( 45dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold EvaluationContext* ec, 46dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold State* state, 47dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold std::string* error, 48dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold UpdateDownloadParams* result, 49d78caf9baf2026a356130f4754af2c504f423945Gilad Arnold const UpdateState update_state) const { 50dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->update_can_start = true; 51dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->cannot_start_reason = UpdateCannotStartReason::kUndefined; 52dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->download_url_idx = 0; 5314a9e70709b4cda5afc97ac6219bc660810b2077Gilad Arnold result->download_url_allowed = true; 54dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->download_url_num_errors = 0; 55b2f9919a0e4a77dd885625cb52ff7322974bd338Gilad Arnold result->p2p_downloading_allowed = false; 56b2f9919a0e4a77dd885625cb52ff7322974bd338Gilad Arnold result->p2p_sharing_allowed = false; 57dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->do_increment_failures = false; 58dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->backoff_expiry = base::Time(); 59dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->scatter_wait_period = base::TimeDelta(); 60dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold result->scatter_check_threshold = 0; 61dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold return EvalStatus::kSucceeded; 62dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold} 63dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold 64dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad ArnoldEvalStatus DefaultPolicy::UpdateDownloadAllowed( 65dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold EvaluationContext* ec, 66dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold State* state, 67dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold std::string* error, 68dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold bool* result) const { 69dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold *result = true; 70dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold return EvalStatus::kSucceeded; 71dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold} 72dc4bb268eb6e6ddcd087d5eccfd88c8e92252920Gilad Arnold 7378ecbfc254c574e52cfe63310a801381a0035c43Gilad ArnoldEvalStatus DefaultPolicy::P2PEnabled( 7478ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold EvaluationContext* ec, 7578ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold State* state, 7678ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold std::string* error, 7778ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold bool* result) const { 7878ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold *result = false; 7978ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold return EvalStatus::kSucceeded; 8078ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold} 8178ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold 8278ecbfc254c574e52cfe63310a801381a0035c43Gilad ArnoldEvalStatus DefaultPolicy::P2PEnabledChanged( 8378ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold EvaluationContext* ec, 8478ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold State* state, 8578ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold std::string* error, 8678ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold bool* result, 8778ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold bool prev_result) const { 8878ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold // This policy will always prohibit P2P, so this is signaling to the caller 8978ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold // that the decision is final (because the current value is the same as the 9078ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold // previous one) and there's no need to issue another call. 9178ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold *result = false; 9278ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold return EvalStatus::kSucceeded; 9378ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold} 9478ecbfc254c574e52cfe63310a801381a0035c43Gilad Arnold 95a23e408368ad34e21ee90ebd0dcb55cd03417d22Gilad Arnold} // namespace chromeos_update_manager 96