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"
Java_android_net_UidRangeTest_readAndWriteNative(JNIEnv * env,jclass,jbyteArray inParcel)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"
Java_android_net_UidRangeTest_getStart(JNIEnv * env,jclass,jbyteArray inParcel)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"
Java_android_net_UidRangeTest_getStop(JNIEnv * env,jclass,jbyteArray inParcel)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 */
unmarshall(JNIEnv * env,jbyteArray parcelData)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 */
marshall(JNIEnv * env,const UidRange & range)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