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
27 namespace android {
28
29 // ----------------------------------------------------------------------
30
31 class BpPermissionController : public BpInterface<IPermissionController>
32 {
33 public:
BpPermissionController(const sp<IBinder> & impl)34 BpPermissionController(const sp<IBinder>& impl)
35 : BpInterface<IPermissionController>(impl)
36 {
37 }
38
checkPermission(const String16 & permission,int32_t pid,int32_t uid)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
53 IMPLEMENT_META_INTERFACE(PermissionController, "android.os.IPermissionController");
54
55 // ----------------------------------------------------------------------
56
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)57 status_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