The Android Open Source Project | 7c1b96a | 2008-10-21 07:00:00 -0700 | [diff] [blame^] | 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 <utils/IPermissionController.h> |
| 20 | |
| 21 | #include <utils/Debug.h> |
| 22 | #include <utils/Log.h> |
| 23 | #include <utils/Parcel.h> |
| 24 | #include <utils/String8.h> |
| 25 | |
| 26 | #include <private/utils/Static.h> |
| 27 | |
| 28 | namespace android { |
| 29 | |
| 30 | // ---------------------------------------------------------------------- |
| 31 | |
| 32 | class BpPermissionController : public BpInterface<IPermissionController> |
| 33 | { |
| 34 | public: |
| 35 | BpPermissionController(const sp<IBinder>& impl) |
| 36 | : BpInterface<IPermissionController>(impl) |
| 37 | { |
| 38 | } |
| 39 | |
| 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.readInt32() != 0) return 0; |
| 50 | return reply.readInt32() != 0; |
| 51 | } |
| 52 | }; |
| 53 | |
| 54 | IMPLEMENT_META_INTERFACE(PermissionController, "android.os.IPermissionController"); |
| 55 | |
| 56 | // ---------------------------------------------------------------------- |
| 57 | |
| 58 | #define CHECK_INTERFACE(interface, data, reply) \ |
| 59 | do { if (!data.enforceInterface(interface::getInterfaceDescriptor())) { \ |
| 60 | LOGW("Call incorrectly routed to " #interface); \ |
| 61 | return PERMISSION_DENIED; \ |
| 62 | } } while (0) |
| 63 | |
| 64 | status_t BnPermissionController::onTransact( |
| 65 | uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) |
| 66 | { |
| 67 | //printf("PermissionController received: "); data.print(); |
| 68 | switch(code) { |
| 69 | case CHECK_PERMISSION_TRANSACTION: { |
| 70 | CHECK_INTERFACE(IPermissionController, data, reply); |
| 71 | String16 permission = data.readString16(); |
| 72 | int32_t pid = data.readInt32(); |
| 73 | int32_t uid = data.readInt32(); |
| 74 | bool res = checkPermission(permission, pid, uid); |
| 75 | // write exception |
| 76 | reply->writeInt32(0); |
| 77 | reply->writeInt32(res ? 1 : 0); |
| 78 | return NO_ERROR; |
| 79 | } break; |
| 80 | default: |
| 81 | return BBinder::onTransact(code, data, reply, flags); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | }; // namespace android |
| 86 | |