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      1 /*
      2  * Copyright (C) 2018 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 "chre/platform/slpi/nanoapp_load_manager.h"
     18 
     19 namespace chre {
     20 
     21 bool NanoappLoadManager::prepareForLoad(
     22     uint16_t hostClientId, uint32_t transactionId, uint64_t appId,
     23     uint32_t appVersion, size_t totalBinaryLen) {
     24   if (hasPendingLoadTransaction()) {
     25     LOGW("Pending load transaction already exists. Overriding previous"
     26          " transaction.");
     27   }
     28   mCurrentLoadInfo.hostClientId = hostClientId;
     29   mCurrentLoadInfo.transactionId = transactionId;
     30   mCurrentLoadInfo.nextFragmentId = 1;
     31   mNanoapp = MakeUnique<Nanoapp>();
     32 
     33   bool success = false;
     34   if (mNanoapp.isNull()) {
     35     LOG_OOM();
     36   } else if (!mNanoapp->reserveBuffer(appId, appVersion, totalBinaryLen)) {
     37     LOGE("Failed to reserve %zu bytes for nanoapp 0x%016" PRIx64,
     38          totalBinaryLen, appId);
     39   } else {
     40     success = true;
     41   }
     42 
     43   if (!success) {
     44     markFailure();
     45   }
     46 
     47   return success;
     48 }
     49 
     50 bool NanoappLoadManager::copyNanoappFragment(
     51     uint16_t hostClientId, uint32_t transactionId, uint32_t fragmentId,
     52     const void *buffer, size_t bufferLen) {
     53   bool success = false;
     54   if (validateFragment(hostClientId, transactionId, fragmentId)) {
     55     success = mNanoapp->copyNanoappFragment(buffer, bufferLen);
     56     if (success) {
     57       mCurrentLoadInfo.nextFragmentId++;
     58     } else {
     59       markFailure();
     60     }
     61   }
     62 
     63   return success;
     64 }
     65 
     66 bool NanoappLoadManager::validateFragment(
     67     uint16_t hostClientId, uint32_t transactionId, uint32_t fragmentId) const {
     68   bool valid = false;
     69   if (!hasPendingLoadTransaction()) {
     70     LOGE("No pending load transaction exists");
     71   } else {
     72     const FragmentedLoadInfo& info = mCurrentLoadInfo;
     73     valid = (info.hostClientId == hostClientId
     74         && info.transactionId == transactionId
     75         && info.nextFragmentId == fragmentId);
     76     if (!valid) {
     77       LOGE("Unexpected load fragment: expected host %" PRIu16
     78           "transaction %" PRIu32 " fragment %" PRIu32 ", received host %"
     79            PRIu16 " transaction %" PRIu32 " fragment %" PRIu32,
     80            info.hostClientId, info.transactionId, info.nextFragmentId,
     81            hostClientId, transactionId, fragmentId);
     82     }
     83   }
     84 
     85   return valid;
     86 }
     87 
     88 }  // namespace chre
     89