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/Debug.h>
22 #include <utils/Log.h>
23 #include <binder/Parcel.h>
24 #include <utils/String8.h>
25
26 #include <private/binder/Static.h>
27
28 namespace android {
29
30 // ----------------------------------------------------------------------
31
32 class BpPermissionController : public BpInterface<IPermissionController>
33 {
34 public:
BpPermissionController(const sp<IBinder> & impl)35 BpPermissionController(const sp<IBinder>& impl)
36 : BpInterface<IPermissionController>(impl)
37 {
38 }
39
checkPermission(const String16 & permission,int32_t pid,int32_t uid)40 virtual bool checkPermission(const String16& permission, int32_t pid, int32_t uid)
41 {
42 Parcel data, reply;
43 data.writeInterfaceToken(IPermissionController::getInterfaceDescriptor());
44 data.writeString16(permission);
45 data.writeInt32(pid);
46 data.writeInt32(uid);
47 remote()->transact(CHECK_PERMISSION_TRANSACTION, data, &reply);
48 // fail on exception
49 if (reply.readExceptionCode() != 0) return 0;
50 return reply.readInt32() != 0;
51 }
52 };
53
54 IMPLEMENT_META_INTERFACE(PermissionController, "android.os.IPermissionController");
55
56 // ----------------------------------------------------------------------
57
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)58 status_t BnPermissionController::onTransact(
59 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
60 {
61 //printf("PermissionController received: "); data.print();
62 switch(code) {
63 case CHECK_PERMISSION_TRANSACTION: {
64 CHECK_INTERFACE(IPermissionController, data, reply);
65 String16 permission = data.readString16();
66 int32_t pid = data.readInt32();
67 int32_t uid = data.readInt32();
68 bool res = checkPermission(permission, pid, uid);
69 reply->writeNoException();
70 reply->writeInt32(res ? 1 : 0);
71 return NO_ERROR;
72 } break;
73 default:
74 return BBinder::onTransact(code, data, reply, flags);
75 }
76 }
77
78 }; // namespace android
79