1 /* 2 * Copyright (C) 2016 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 "UidRangeTest.h" 22 23 using android::net::UidRange; 24 25 extern "C" 26 JNIEXPORT jbyteArray Java_android_net_UidRangeTest_readAndWriteNative(JNIEnv* env, jclass, 27 jbyteArray inParcel) { 28 const UidRange range = unmarshall(env, inParcel); 29 return marshall(env, range); 30 } 31 32 extern "C" 33 JNIEXPORT jint Java_android_net_UidRangeTest_getStart(JNIEnv* env, jclass, jbyteArray inParcel) { 34 const UidRange range = unmarshall(env, inParcel); 35 return range.getStart(); 36 } 37 38 extern "C" 39 JNIEXPORT jint Java_android_net_UidRangeTest_getStop(JNIEnv* env, jclass, jbyteArray inParcel) { 40 const UidRange range = unmarshall(env, inParcel); 41 return range.getStop(); 42 } 43 44 45 /** 46 * Reads exactly one UidRange from 'parcelData' assuming that it is a Parcel. Any bytes afterward 47 * are ignored. 48 */ 49 UidRange unmarshall(JNIEnv* env, jbyteArray parcelData) { 50 const int length = env->GetArrayLength(parcelData); 51 52 std::unique_ptr<uint8_t> bytes(new uint8_t[length]); 53 env->GetByteArrayRegion(parcelData, 0, length, reinterpret_cast<jbyte*>(bytes.get())); 54 55 android::Parcel p; 56 p.setData(bytes.get(), length); 57 58 UidRange range; 59 range.readFromParcel(&p); 60 return range; 61 } 62 63 /** 64 * Creates a Java byte[] array and writes the contents of 'range' to it as a Parcel containing 65 * exactly one object. 66 * 67 * Every UidRange maps to a unique parcel object, so both 'marshall(e, unmarshall(e, x))' and 68 * 'unmarshall(e, marshall(e, x))' should be fixed points. 69 */ 70 jbyteArray marshall(JNIEnv* env, const UidRange& range) { 71 android::Parcel p; 72 range.writeToParcel(&p); 73 const int length = p.dataSize(); 74 75 jbyteArray parcelData = env->NewByteArray(length); 76 env->SetByteArrayRegion(parcelData, 0, length, reinterpret_cast<const jbyte*>(p.data())); 77 78 return parcelData; 79 } 80
