1/*
2 * Copyright (C) 2005 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 "PermissionController"
18
19#include <binder/IPermissionController.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 BpPermissionController : public BpInterface<IPermissionController>
32{
33public:
34    BpPermissionController(const sp<IBinder>& impl)
35        : BpInterface<IPermissionController>(impl)
36    {
37    }
38
39    virtual bool checkPermission(const String16& permission, int32_t pid, int32_t uid)
40    {
41        Parcel data, reply;
42        data.writeInterfaceToken(IPermissionController::getInterfaceDescriptor());
43        data.writeString16(permission);
44        data.writeInt32(pid);
45        data.writeInt32(uid);
46        remote()->transact(CHECK_PERMISSION_TRANSACTION, data, &reply);
47        // fail on exception
48        if (reply.readExceptionCode() != 0) return 0;
49        return reply.readInt32() != 0;
50    }
51};
52
53IMPLEMENT_META_INTERFACE(PermissionController, "android.os.IPermissionController");
54
55// ----------------------------------------------------------------------
56
57status_t BnPermissionController::onTransact(
58    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
59{
60    //printf("PermissionController received: "); data.print();
61    switch(code) {
62        case CHECK_PERMISSION_TRANSACTION: {
63            CHECK_INTERFACE(IPermissionController, data, reply);
64            String16 permission = data.readString16();
65            int32_t pid = data.readInt32();
66            int32_t uid = data.readInt32();
67            bool res = checkPermission(permission, pid, uid);
68            reply->writeNoException();
69            reply->writeInt32(res ? 1 : 0);
70            return NO_ERROR;
71        } break;
72        default:
73            return BBinder::onTransact(code, data, reply, flags);
74    }
75}
76
77}; // namespace android
78