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;
35static jclass gLongClazz;
36static jmethodID gLongValueOf;
37
38namespace android {
39
40using vintf::HalManifest;
41using vintf::Level;
42using vintf::SchemaType;
43using vintf::VintfObject;
44using vintf::XmlConverter;
45using vintf::Vndk;
46using vintf::gHalManifestConverter;
47using vintf::gCompatibilityMatrixConverter;
48using vintf::to_string;
49
50template<typename V>
51static inline jobjectArray toJavaStringArray(JNIEnv* env, const V& v) {
52    size_t i;
53    typename V::const_iterator it;
54    jobjectArray ret = env->NewObjectArray(v.size(), gString, NULL /* init element */);
55    for (i = 0, it = v.begin(); it != v.end(); ++i, ++it) {
56        env->SetObjectArrayElement(ret, i, env->NewStringUTF(it->c_str()));
57    }
58    return ret;
59}
60
61template<typename T>
62static void tryAddSchema(const std::shared_ptr<const T>& object, const XmlConverter<T>& converter,
63        const std::string& description,
64        std::vector<std::string>* cStrings) {
65    if (object == nullptr) {
66        LOG(WARNING) << __FUNCTION__ << "Cannot get " << description;
67    } else {
68        cStrings->push_back(converter(*object));
69    }
70}
71
72static void tryAddHalNamesAndVersions(const std::shared_ptr<const HalManifest>& manifest,
73        const std::string& description,
74        std::set<std::string> *output) {
75    if (manifest == nullptr) {
76        LOG(WARNING) << __FUNCTION__ << "Cannot get " << description;
77    } else {
78        auto names = manifest->getHalNamesAndVersions();
79        output->insert(names.begin(), names.end());
80    }
81}
82
83static jobjectArray android_os_VintfObject_report(JNIEnv* env, jclass)
84{
85    std::vector<std::string> cStrings;
86
87    tryAddSchema(VintfObject::GetDeviceHalManifest(), gHalManifestConverter,
88            "device manifest", &cStrings);
89    tryAddSchema(VintfObject::GetFrameworkHalManifest(), gHalManifestConverter,
90            "framework manifest", &cStrings);
91    tryAddSchema(VintfObject::GetDeviceCompatibilityMatrix(), gCompatibilityMatrixConverter,
92            "device compatibility matrix", &cStrings);
93    tryAddSchema(VintfObject::GetFrameworkCompatibilityMatrix(), gCompatibilityMatrixConverter,
94            "framework compatibility matrix", &cStrings);
95
96    return toJavaStringArray(env, cStrings);
97}
98
99static jint verify(JNIEnv* env, jobjectArray packageInfo, android::vintf::DisabledChecks checks) {
100    std::vector<std::string> cPackageInfo;
101    if (packageInfo) {
102        size_t count = env->GetArrayLength(packageInfo);
103        cPackageInfo.resize(count);
104        for (size_t i = 0; i < count; ++i) {
105            jstring element = (jstring)env->GetObjectArrayElement(packageInfo, i);
106            const char *cString = env->GetStringUTFChars(element, NULL /* isCopy */);
107            cPackageInfo[i] = cString;
108            env->ReleaseStringUTFChars(element, cString);
109        }
110    }
111    std::string error;
112    int32_t status = VintfObject::CheckCompatibility(cPackageInfo, &error, checks);
113    if (status)
114        LOG(WARNING) << "VintfObject.verify() returns " << status << ": " << error;
115    return status;
116}
117
118static jint android_os_VintfObject_verify(JNIEnv* env, jclass, jobjectArray packageInfo) {
119    return verify(env, packageInfo, ::android::vintf::ENABLE_ALL_CHECKS);
120}
121
122static jint android_os_VintfObject_verifyWithoutAvb(JNIEnv* env, jclass) {
123    return verify(env, nullptr, ::android::vintf::DISABLE_AVB_CHECK);
124}
125
126static jobjectArray android_os_VintfObject_getHalNamesAndVersions(JNIEnv* env, jclass) {
127    std::set<std::string> halNames;
128    tryAddHalNamesAndVersions(VintfObject::GetDeviceHalManifest(),
129            "device manifest", &halNames);
130    tryAddHalNamesAndVersions(VintfObject::GetFrameworkHalManifest(),
131            "framework manifest", &halNames);
132    return toJavaStringArray(env, halNames);
133}
134
135static jstring android_os_VintfObject_getSepolicyVersion(JNIEnv* env, jclass) {
136    std::shared_ptr<const HalManifest> manifest = VintfObject::GetDeviceHalManifest();
137    if (manifest == nullptr || manifest->type() != SchemaType::DEVICE) {
138        LOG(WARNING) << __FUNCTION__ << "Cannot get device manifest";
139        return nullptr;
140    }
141    std::string cString = to_string(manifest->sepolicyVersion());
142    return env->NewStringUTF(cString.c_str());
143}
144
145static jobject android_os_VintfObject_getVndkSnapshots(JNIEnv* env, jclass) {
146    std::shared_ptr<const HalManifest> manifest = VintfObject::GetFrameworkHalManifest();
147    if (manifest == nullptr || manifest->type() != SchemaType::FRAMEWORK) {
148        LOG(WARNING) << __FUNCTION__ << "Cannot get framework manifest";
149        return nullptr;
150    }
151    jobject jMap = env->NewObject(gHashMapClazz, gHashMapInit);
152    for (const auto &vndk : manifest->vendorNdks()) {
153        std::string key = vndk.version();
154        env->CallObjectMethod(jMap, gHashMapPut,
155                env->NewStringUTF(key.c_str()), toJavaStringArray(env, vndk.libraries()));
156    }
157    return jMap;
158}
159
160static jobject android_os_VintfObject_getTargetFrameworkCompatibilityMatrixVersion(JNIEnv* env, jclass) {
161    std::shared_ptr<const HalManifest> manifest = VintfObject::GetDeviceHalManifest();
162    if (manifest == nullptr || manifest->level() == Level::UNSPECIFIED) {
163        return nullptr;
164    }
165    return env->CallStaticObjectMethod(gLongClazz, gLongValueOf, static_cast<jlong>(manifest->level()));
166}
167
168// ----------------------------------------------------------------------------
169
170static const JNINativeMethod gVintfObjectMethods[] = {
171    {"report", "()[Ljava/lang/String;", (void*)android_os_VintfObject_report},
172    {"verify", "([Ljava/lang/String;)I", (void*)android_os_VintfObject_verify},
173    {"verifyWithoutAvb", "()I", (void*)android_os_VintfObject_verifyWithoutAvb},
174    {"getHalNamesAndVersions", "()[Ljava/lang/String;", (void*)android_os_VintfObject_getHalNamesAndVersions},
175    {"getSepolicyVersion", "()Ljava/lang/String;", (void*)android_os_VintfObject_getSepolicyVersion},
176    {"getVndkSnapshots", "()Ljava/util/Map;", (void*)android_os_VintfObject_getVndkSnapshots},
177    {"getTargetFrameworkCompatibilityMatrixVersion", "()Ljava/lang/Long;", (void*)android_os_VintfObject_getTargetFrameworkCompatibilityMatrixVersion},
178};
179
180const char* const kVintfObjectPathName = "android/os/VintfObject";
181
182int register_android_os_VintfObject(JNIEnv* env)
183{
184
185    gString = MakeGlobalRefOrDie(env, FindClassOrDie(env, "java/lang/String"));
186    gHashMapClazz = MakeGlobalRefOrDie(env, FindClassOrDie(env, "java/util/HashMap"));
187    gHashMapInit = GetMethodIDOrDie(env, gHashMapClazz, "<init>", "()V");
188    gHashMapPut = GetMethodIDOrDie(env, gHashMapClazz,
189            "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
190    gLongClazz = MakeGlobalRefOrDie(env, FindClassOrDie(env, "java/lang/Long"));
191    gLongValueOf = GetStaticMethodIDOrDie(env, gLongClazz, "valueOf", "(J)Ljava/lang/Long;");
192
193    return RegisterMethodsOrDie(env, kVintfObjectPathName, gVintfObjectMethods,
194            NELEM(gVintfObjectMethods));
195}
196
197};
198