1/*
2 * Copyright (C) 2013 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 "AppOpsService"
18
19#include <binder/IAppOpsService.h>
20
21#include <utils/Log.h>
22#include <binder/Parcel.h>
23#include <utils/String8.h>
24
25#include <private/binder/Static.h>
26
27namespace android {
28
29// ----------------------------------------------------------------------
30
31class BpAppOpsService : public BpInterface<IAppOpsService>
32{
33public:
34    BpAppOpsService(const sp<IBinder>& impl)
35        : BpInterface<IAppOpsService>(impl)
36    {
37    }
38
39    virtual int32_t checkOperation(int32_t code, int32_t uid, const String16& packageName) {
40        Parcel data, reply;
41        data.writeInterfaceToken(IAppOpsService::getInterfaceDescriptor());
42        data.writeInt32(code);
43        data.writeInt32(uid);
44        data.writeString16(packageName);
45        remote()->transact(CHECK_OPERATION_TRANSACTION, data, &reply);
46        // fail on exception
47        if (reply.readExceptionCode() != 0) return MODE_ERRORED;
48        return reply.readInt32();
49    }
50
51    virtual int32_t noteOperation(int32_t code, int32_t uid, const String16& packageName) {
52        Parcel data, reply;
53        data.writeInterfaceToken(IAppOpsService::getInterfaceDescriptor());
54        data.writeInt32(code);
55        data.writeInt32(uid);
56        data.writeString16(packageName);
57        remote()->transact(NOTE_OPERATION_TRANSACTION, data, &reply);
58        // fail on exception
59        if (reply.readExceptionCode() != 0) return MODE_ERRORED;
60        return reply.readInt32();
61    }
62
63    virtual int32_t startOperation(const sp<IBinder>& token, int32_t code, int32_t uid,
64                const String16& packageName) {
65        Parcel data, reply;
66        data.writeInterfaceToken(IAppOpsService::getInterfaceDescriptor());
67        data.writeStrongBinder(token);
68        data.writeInt32(code);
69        data.writeInt32(uid);
70        data.writeString16(packageName);
71        remote()->transact(START_OPERATION_TRANSACTION, data, &reply);
72        // fail on exception
73        if (reply.readExceptionCode() != 0) return MODE_ERRORED;
74        return reply.readInt32();
75    }
76
77    virtual void finishOperation(const sp<IBinder>& token, int32_t code, int32_t uid,
78            const String16& packageName) {
79        Parcel data, reply;
80        data.writeInterfaceToken(IAppOpsService::getInterfaceDescriptor());
81        data.writeStrongBinder(token);
82        data.writeInt32(code);
83        data.writeInt32(uid);
84        data.writeString16(packageName);
85        remote()->transact(FINISH_OPERATION_TRANSACTION, data, &reply);
86    }
87
88    virtual void startWatchingMode(int32_t op, const String16& packageName,
89            const sp<IAppOpsCallback>& callback) {
90        Parcel data, reply;
91        data.writeInterfaceToken(IAppOpsService::getInterfaceDescriptor());
92        data.writeInt32(op);
93        data.writeString16(packageName);
94        data.writeStrongBinder(IInterface::asBinder(callback));
95        remote()->transact(START_WATCHING_MODE_TRANSACTION, data, &reply);
96    }
97
98    virtual void stopWatchingMode(const sp<IAppOpsCallback>& callback) {
99        Parcel data, reply;
100        data.writeInterfaceToken(IAppOpsService::getInterfaceDescriptor());
101        data.writeStrongBinder(IInterface::asBinder(callback));
102        remote()->transact(STOP_WATCHING_MODE_TRANSACTION, data, &reply);
103    }
104
105    virtual sp<IBinder> getToken(const sp<IBinder>& clientToken) {
106        Parcel data, reply;
107        data.writeInterfaceToken(IAppOpsService::getInterfaceDescriptor());
108        data.writeStrongBinder(clientToken);
109        remote()->transact(GET_TOKEN_TRANSACTION, data, &reply);
110        // fail on exception
111        if (reply.readExceptionCode() != 0) return NULL;
112        return reply.readStrongBinder();
113    }
114
115
116    virtual int32_t permissionToOpCode(const String16& permission) {
117        Parcel data, reply;
118        data.writeInterfaceToken(IAppOpsService::getInterfaceDescriptor());
119        data.writeString16(permission);
120        remote()->transact(PERMISSION_TO_OP_CODE_TRANSACTION, data, &reply);
121        // fail on exception
122        if (reply.readExceptionCode() != 0) return -1;
123        return reply.readInt32();
124    }
125};
126
127IMPLEMENT_META_INTERFACE(AppOpsService, "com.android.internal.app.IAppOpsService");
128
129// ----------------------------------------------------------------------
130
131status_t BnAppOpsService::onTransact(
132    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
133{
134    //printf("AppOpsService received: "); data.print();
135    switch(code) {
136        case CHECK_OPERATION_TRANSACTION: {
137            CHECK_INTERFACE(IAppOpsService, data, reply);
138            int32_t code = data.readInt32();
139            int32_t uid = data.readInt32();
140            String16 packageName = data.readString16();
141            int32_t res = checkOperation(code, uid, packageName);
142            reply->writeNoException();
143            reply->writeInt32(res);
144            return NO_ERROR;
145        } break;
146        case NOTE_OPERATION_TRANSACTION: {
147            CHECK_INTERFACE(IAppOpsService, data, reply);
148            int32_t code = data.readInt32();
149            int32_t uid = data.readInt32();
150            String16 packageName = data.readString16();
151            int32_t res = noteOperation(code, uid, packageName);
152            reply->writeNoException();
153            reply->writeInt32(res);
154            return NO_ERROR;
155        } break;
156        case START_OPERATION_TRANSACTION: {
157            CHECK_INTERFACE(IAppOpsService, data, reply);
158            sp<IBinder> token = data.readStrongBinder();
159            int32_t code = data.readInt32();
160            int32_t uid = data.readInt32();
161            String16 packageName = data.readString16();
162            int32_t res = startOperation(token, code, uid, packageName);
163            reply->writeNoException();
164            reply->writeInt32(res);
165            return NO_ERROR;
166        } break;
167        case FINISH_OPERATION_TRANSACTION: {
168            CHECK_INTERFACE(IAppOpsService, data, reply);
169            sp<IBinder> token = data.readStrongBinder();
170            int32_t code = data.readInt32();
171            int32_t uid = data.readInt32();
172            String16 packageName = data.readString16();
173            finishOperation(token, code, uid, packageName);
174            reply->writeNoException();
175            return NO_ERROR;
176        } break;
177        case START_WATCHING_MODE_TRANSACTION: {
178            CHECK_INTERFACE(IAppOpsService, data, reply);
179            int32_t op = data.readInt32();
180            String16 packageName = data.readString16();
181            sp<IAppOpsCallback> callback = interface_cast<IAppOpsCallback>(data.readStrongBinder());
182            startWatchingMode(op, packageName, callback);
183            reply->writeNoException();
184            return NO_ERROR;
185        } break;
186        case STOP_WATCHING_MODE_TRANSACTION: {
187            CHECK_INTERFACE(IAppOpsService, data, reply);
188            sp<IAppOpsCallback> callback = interface_cast<IAppOpsCallback>(data.readStrongBinder());
189            stopWatchingMode(callback);
190            reply->writeNoException();
191            return NO_ERROR;
192        } break;
193        case GET_TOKEN_TRANSACTION: {
194            CHECK_INTERFACE(IAppOpsService, data, reply);
195            sp<IBinder> clientToken = data.readStrongBinder();
196            sp<IBinder> token = getToken(clientToken);
197            reply->writeNoException();
198            reply->writeStrongBinder(token);
199            return NO_ERROR;
200        } break;
201        case PERMISSION_TO_OP_CODE_TRANSACTION: {
202            CHECK_INTERFACE(IAppOpsService, data, reply);
203            String16 permission = data.readString16();
204            const int32_t opCode = permissionToOpCode(permission);
205            reply->writeNoException();
206            reply->writeInt32(opCode);
207            return NO_ERROR;
208        } break;
209        default:
210            return BBinder::onTransact(code, data, reply, flags);
211    }
212}
213
214}; // namespace android
215