1 /* 2 * Copyright (C) 2017 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 #include "Weaver.h" 18 19 #include <android-base/logging.h> 20 21 #include <Weaver.h> 22 #include <Weaver.client.h> 23 24 namespace android { 25 namespace hardware { 26 namespace weaver { 27 28 // libhidl 29 using ::android::hardware::Void; 30 31 // HAL 32 using ::android::hardware::weaver::V1_0::WeaverConfig; 33 using ::android::hardware::weaver::V1_0::WeaverReadResponse; 34 using ::android::hardware::weaver::V1_0::WeaverReadStatus; 35 36 // Weaver app 37 using ::nugget::app::weaver::GetConfigRequest; 38 using ::nugget::app::weaver::GetConfigResponse; 39 using ::nugget::app::weaver::ReadRequest; 40 using ::nugget::app::weaver::ReadResponse; 41 using ::nugget::app::weaver::WriteRequest; 42 using ::nugget::app::weaver::WriteResponse; 43 44 // Methods from ::android::hardware::weaver::V1_0::IWeaver follow. 45 Return<void> Weaver::getConfig(getConfig_cb _hidl_cb) { 46 LOG(VERBOSE) << "Running Weaver::getNumSlots"; 47 48 GetConfigRequest request; 49 GetConfigResponse response; 50 const uint32_t appStatus = _weaver.GetConfig(request, &response); 51 52 if (appStatus != APP_SUCCESS) { 53 LOG(ERROR) << "App GetConfig request failed with status " << appStatus; 54 _hidl_cb(WeaverStatus::FAILED, WeaverConfig{}); 55 return Void(); 56 } 57 58 _hidl_cb(WeaverStatus::OK, 59 WeaverConfig{response.number_of_slots(), response.key_size(), response.value_size()}); 60 return Void(); 61 } 62 63 Return<WeaverStatus> Weaver::write(uint32_t slotId, const hidl_vec<uint8_t>& key, 64 const hidl_vec<uint8_t>& value) { 65 LOG(INFO) << "Running Weaver::write on slot " << slotId; 66 67 WriteRequest request; 68 request.set_slot(slotId); 69 request.set_key(key.data(), key.size()); 70 request.set_value(value.data(), value.size()); 71 WriteResponse response; 72 const uint32_t appStatus = _weaver.Write(request, &response); 73 74 if (appStatus != APP_SUCCESS) { 75 LOG(ERROR) << "App Write request failed with status " << appStatus; 76 return WeaverStatus::FAILED; 77 } 78 79 return WeaverStatus::OK; 80 } 81 82 Return<void> Weaver::read(uint32_t slotId, const hidl_vec<uint8_t>& key, read_cb _hidl_cb) { 83 LOG(VERBOSE) << "Running Weaver::read on slot " << slotId; 84 85 ReadRequest request; 86 request.set_slot(slotId); 87 request.set_key(key.data(), key.size()); 88 ReadResponse response; 89 const uint32_t appStatus = _weaver.Read(request, &response); 90 91 if (appStatus != APP_SUCCESS) { 92 LOG(ERROR) << "App Read request failed with status " << appStatus; 93 _hidl_cb(WeaverReadStatus::FAILED, WeaverReadResponse{}); 94 return Void(); 95 } 96 97 WeaverReadStatus status; 98 hidl_vec<uint8_t> value; 99 uint32_t timeout = 0; 100 switch (response.error()) { 101 case ReadResponse::NONE: 102 status = WeaverReadStatus::OK; 103 value.setToExternal(reinterpret_cast<uint8_t*>(const_cast<char*>(response.value().data())), 104 response.value().size(), false); 105 break; 106 case ReadResponse::WRONG_KEY: 107 LOG(WARNING) << "Wrong key used when reading slot " << slotId; 108 status = WeaverReadStatus::INCORRECT_KEY; 109 timeout = response.throttle_msec(); 110 break; 111 case ReadResponse::THROTTLE: 112 LOG(WARNING) << "Attempted to read slot " << slotId << " when throttling is active"; 113 status = WeaverReadStatus::THROTTLE; 114 timeout = response.throttle_msec(); 115 break; 116 default: 117 LOG(ERROR) << "Unexpected error code from app (" << response.error() << ")"; 118 status = WeaverReadStatus::FAILED; 119 break; 120 } 121 122 _hidl_cb(status, WeaverReadResponse{timeout, value}); 123 return Void(); 124 } 125 126 } // namespace weaver 127 } // namespace hardware 128 } // namespace android 129