IPermissionController.cpp revision c5b2c0bf8007562536b822eb060fc54a01f8e08b
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 28namespace android { 29 30// ---------------------------------------------------------------------- 31 32class BpPermissionController : public BpInterface<IPermissionController> 33{ 34public: 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 54IMPLEMENT_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 64status_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 87