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#define LOG_TAG "VintfObject"
18//#define LOG_NDEBUG 0
19#include <android-base/logging.h>
20
21#include <vector>
22#include <string>
23
24#include <nativehelper/JNIHelp.h>
25#include <vintf/VintfObject.h>
26#include <vintf/parse_string.h>
27#include <vintf/parse_xml.h>
28
29#include "core_jni_helpers.h"
30
31static jclass gString;
32static jclass gHashMapClazz;
33static jmethodID gHashMapInit;
34static jmethodID gHashMapPut;
35
36namespace android {
37
38using vintf::HalManifest;
39using vintf::SchemaType;
40using vintf::VintfObject;
41using vintf::XmlConverter;
42using vintf::Vndk;
43using vintf::gHalManifestConverter;
44using vintf::gCompatibilityMatrixConverter;
45using vintf::to_string;
46
47template<typename V>
48static inline jobjectArray toJavaStringArray(JNIEnv* env, const V& v) {
49    size_t i;
50    typename V::const_iterator it;
51    jobjectArray ret = env->NewObjectArray(v.size(), gString, NULL /* init element */);
52    for (i = 0, it = v.begin(); it != v.end(); ++i, ++it) {
53        env->SetObjectArrayElement(ret, i, env->NewStringUTF(it->c_str()));
54    }
55    return ret;
56}
57
58template<typename T>
59static void tryAddSchema(const T* object, const XmlConverter<T>& converter,
60        const std::string& description,
61        std::vector<std::string>* cStrings) {
62    if (object == nullptr) {
63        LOG(WARNING) << __FUNCTION__ << "Cannot get " << description;
64    } else {
65        cStrings->push_back(converter(*object));
66    }
67}
68
69static void tryAddHalNamesAndVersions(const HalManifest *manifest,
70        const std::string& description,
71        std::set<std::string> *output) {
72    if (manifest == nullptr) {
73        LOG(WARNING) << __FUNCTION__ << "Cannot get " << description;
74    } else {
75        auto names = manifest->getHalNamesAndVersions();
76        output->insert(names.begin(), names.end());
77    }
78}
79
80static jobjectArray android_os_VintfObject_report(JNIEnv* env, jclass)
81{
82    std::vector<std::string> cStrings;
83
84    tryAddSchema(VintfObject::GetDeviceHalManifest(), gHalManifestConverter,
85            "device manifest", &cStrings);
86    tryAddSchema(VintfObject::GetFrameworkHalManifest(), gHalManifestConverter,
87            "framework manifest", &cStrings);
88    tryAddSchema(VintfObject::GetDeviceCompatibilityMatrix(), gCompatibilityMatrixConverter,
89            "device compatibility matrix", &cStrings);
90    tryAddSchema(VintfObject::GetFrameworkCompatibilityMatrix(), gCompatibilityMatrixConverter,
91            "framework compatibility matrix", &cStrings);
92
93    return toJavaStringArray(env, cStrings);
94}
95
96static jint android_os_VintfObject_verify(JNIEnv* env, jclass, jobjectArray packageInfo) {
97    size_t count = env->GetArrayLength(packageInfo);
98    std::vector<std::string> cPackageInfo{count};
99    for (size_t i = 0; i < count; ++i) {
100        jstring element = (jstring)env->GetObjectArrayElement(packageInfo, i);
101        const char *cString = env->GetStringUTFChars(element, NULL /* isCopy */);
102        cPackageInfo[i] = cString;
103        env->ReleaseStringUTFChars(element, cString);
104    }
105    std::string error;
106    int32_t status = VintfObject::CheckCompatibility(cPackageInfo, &error);
107    if (status)
108        LOG(WARNING) << "VintfObject.verify() returns " << status << ": " << error;
109    return status;
110}
111
112static jobjectArray android_os_VintfObject_getHalNamesAndVersions(JNIEnv* env, jclass) {
113    std::set<std::string> halNames;
114    tryAddHalNamesAndVersions(VintfObject::GetDeviceHalManifest(),
115            "device manifest", &halNames);
116    tryAddHalNamesAndVersions(VintfObject::GetFrameworkHalManifest(),
117            "framework manifest", &halNames);
118    return toJavaStringArray(env, halNames);
119}
120
121static jstring android_os_VintfObject_getSepolicyVersion(JNIEnv* env, jclass) {
122    const HalManifest *manifest = VintfObject::GetDeviceHalManifest();
123    if (manifest == nullptr || manifest->type() != SchemaType::DEVICE) {
124        LOG(WARNING) << __FUNCTION__ << "Cannot get device manifest";
125        return nullptr;
126    }
127    std::string cString = to_string(manifest->sepolicyVersion());
128    return env->NewStringUTF(cString.c_str());
129}
130
131static jobject android_os_VintfObject_getVndkSnapshots(JNIEnv* env, jclass) {
132    const HalManifest *manifest = VintfObject::GetFrameworkHalManifest();
133    if (manifest == nullptr || manifest->type() != SchemaType::FRAMEWORK) {
134        LOG(WARNING) << __FUNCTION__ << "Cannot get framework manifest";
135        return nullptr;
136    }
137    jobject jMap = env->NewObject(gHashMapClazz, gHashMapInit);
138    for (const Vndk &vndk : manifest->vndks()) {
139        std::string key = to_string(vndk.versionRange());
140        env->CallObjectMethod(jMap, gHashMapPut,
141                env->NewStringUTF(key.c_str()), toJavaStringArray(env, vndk.libraries()));
142    }
143    return jMap;
144}
145
146// ----------------------------------------------------------------------------
147
148static const JNINativeMethod gVintfObjectMethods[] = {
149    {"report", "()[Ljava/lang/String;", (void*)android_os_VintfObject_report},
150    {"verify", "([Ljava/lang/String;)I", (void*)android_os_VintfObject_verify},
151    {"getHalNamesAndVersions", "()[Ljava/lang/String;", (void*)android_os_VintfObject_getHalNamesAndVersions},
152    {"getSepolicyVersion", "()Ljava/lang/String;", (void*)android_os_VintfObject_getSepolicyVersion},
153    {"getVndkSnapshots", "()Ljava/util/Map;", (void*)android_os_VintfObject_getVndkSnapshots},
154};
155
156const char* const kVintfObjectPathName = "android/os/VintfObject";
157
158int register_android_os_VintfObject(JNIEnv* env)
159{
160
161    gString = MakeGlobalRefOrDie(env, FindClassOrDie(env, "java/lang/String"));
162    gHashMapClazz = MakeGlobalRefOrDie(env, FindClassOrDie(env, "java/util/HashMap"));
163    gHashMapInit = GetMethodIDOrDie(env, gHashMapClazz, "<init>", "()V");
164    gHashMapPut = GetMethodIDOrDie(env, gHashMapClazz,
165            "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
166
167    return RegisterMethodsOrDie(env, kVintfObjectPathName, gVintfObjectMethods,
168            NELEM(gVintfObjectMethods));
169}
170
171};
172