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 <memory> 18 19 #include <binder/Parcel.h> 20 21 #include "LowpanIdentityTest.h" 22 23 using android::net::lowpan::LowpanIdentity; 24 25 /** 26 * Reads exactly one LowpanIdentity from 'parcelData' assuming that it is a Parcel. Any bytes afterward 27 * are ignored. 28 */ 29 static LowpanIdentity unmarshall(JNIEnv* env, jbyteArray parcelData) { 30 const int length = env->GetArrayLength(parcelData); 31 32 std::unique_ptr<uint8_t> bytes(new uint8_t[length]); 33 env->GetByteArrayRegion(parcelData, 0, length, reinterpret_cast<jbyte*>(bytes.get())); 34 35 android::Parcel p; 36 p.setData(bytes.get(), length); 37 38 LowpanIdentity value; 39 value.readFromParcel(&p); 40 return value; 41 } 42 43 /** 44 * Creates a Java byte[] array and writes the contents of 'addr' to it as a Parcel containing 45 * exactly one object. 46 * 47 * Every LowpanIdentity maps to a unique parcel object, so both 'marshall(e, unmarshall(e, x))' and 48 * 'unmarshall(e, marshall(e, x))' should be fixed points. 49 */ 50 static jbyteArray marshall(JNIEnv* env, const LowpanIdentity& addr) { 51 android::Parcel p; 52 addr.writeToParcel(&p); 53 const int length = p.dataSize(); 54 55 jbyteArray parcelData = env->NewByteArray(length); 56 env->SetByteArrayRegion(parcelData, 0, length, reinterpret_cast<const jbyte*>(p.data())); 57 58 return parcelData; 59 } 60 61 extern "C" 62 JNIEXPORT jbyteArray Java_android_net_lowpan_LowpanIdentityTest_readAndWriteNative(JNIEnv* env, jclass, 63 jbyteArray inParcel) { 64 const LowpanIdentity value = unmarshall(env, inParcel); 65 return marshall(env, value); 66 } 67
