| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "VehicleNetwork" |
| |
| #include <memory> |
| |
| #include <binder/IPCThreadState.h> |
| #include <private/android_filesystem_config.h> |
| |
| #include <utils/Log.h> |
| |
| #include <IVehicleNetwork.h> |
| #include <IVehicleNetworkHalMock.h> |
| #include <VehicleNetworkProto.pb.h> |
| |
| #include "BinderUtil.h" |
| #include "VehicleNetworkProtoUtil.h" |
| |
| namespace android { |
| |
| enum { |
| ON_LIST_PROPERTIES = IBinder::FIRST_CALL_TRANSACTION, |
| ON_PROPERTY_SET, |
| ON_PROPERTY_GET, |
| ON_SUBSCRIBE, |
| ON_UNSUBSCRIBE, |
| }; |
| |
| // ---------------------------------------------------------------------------- |
| |
| const char IVehicleNetworkHalMock::SERVICE_NAME[] = |
| "com.android.car.vehiclenetwork.IVehicleNetworkHalMock"; |
| |
| // ---------------------------------------------------------------------------- |
| |
| class BpVehicleNetworkHalMock : public BpInterface<IVehicleNetworkHalMock> { |
| public: |
| BpVehicleNetworkHalMock(const sp<IBinder> & impl) |
| : BpInterface<IVehicleNetworkHalMock>(impl) { |
| } |
| |
| virtual sp<VehiclePropertiesHolder> onListProperties() { |
| sp<VehiclePropertiesHolder> holder; |
| Parcel data, reply; |
| data.writeInterfaceToken(IVehicleNetworkHalMock::getInterfaceDescriptor()); |
| status_t status = remote()->transact(ON_LIST_PROPERTIES, data, &reply); |
| if (status == NO_ERROR) { |
| reply.readExceptionCode(); // for compatibility with java |
| if (reply.readInt32() == 0) { // no result |
| return holder; |
| } |
| ReadableBlobHolder blob(new Parcel::ReadableBlob()); |
| if (blob.blob == NULL) { |
| ALOGE("listProperties, no memory"); |
| return holder; |
| } |
| int32_t size = reply.readInt32(); |
| status = reply.readBlob(size, blob.blob); |
| if (status != NO_ERROR) { |
| ALOGE("listProperties, cannot read blob %d", status); |
| return holder; |
| } |
| //TODO make this more memory efficient |
| std::unique_ptr<VehiclePropConfigs> configs(new VehiclePropConfigs()); |
| if (configs.get() == NULL) { |
| return holder; |
| } |
| if(!configs->ParseFromArray(blob.blob->data(), size)) { |
| ALOGE("listProperties, cannot parse reply"); |
| return holder; |
| } |
| holder = new VehiclePropertiesHolder(); |
| ASSERT_OR_HANDLE_NO_MEMORY(holder.get(), return); |
| status = VehicleNetworkProtoUtil::fromVehiclePropConfigs(*configs.get(), |
| holder->getList()); |
| if (status != NO_ERROR) { |
| ALOGE("listProperties, cannot convert VehiclePropConfigs %d", status); |
| return holder; |
| } |
| |
| } |
| return holder; |
| } |
| |
| virtual status_t onPropertySet(const vehicle_prop_value_t& value) { |
| Parcel data, reply; |
| data.writeInterfaceToken(IVehicleNetworkHalMock::getInterfaceDescriptor()); |
| status_t status = VehiclePropValueBinderUtil::writeToParcel(data, value); |
| if (status != NO_ERROR) { |
| return status; |
| } |
| status = remote()->transact(ON_PROPERTY_SET, data, &reply); |
| return status; |
| } |
| |
| virtual status_t onPropertyGet(vehicle_prop_value_t* value) { |
| if (value == NULL) { |
| return BAD_VALUE; |
| } |
| Parcel data, reply; |
| data.writeInterfaceToken(IVehicleNetworkHalMock::getInterfaceDescriptor()); |
| status_t status = VehiclePropValueBinderUtil::writeToParcel(data, *value); |
| if (status != NO_ERROR) { |
| return status; |
| } |
| status = remote()->transact(ON_PROPERTY_GET, data, &reply); |
| if (status == NO_ERROR) { |
| reply.readExceptionCode(); // for compatibility with java |
| status = VehiclePropValueBinderUtil::readFromParcel(reply, value); |
| } |
| return status; |
| } |
| |
| virtual status_t onPropertySubscribe(int32_t property, float sampleRate, int32_t zones) { |
| Parcel data, reply; |
| data.writeInterfaceToken(IVehicleNetworkHalMock::getInterfaceDescriptor()); |
| data.writeInt32(property); |
| data.writeFloat(sampleRate); |
| data.writeInt32(zones); |
| status_t status = remote()->transact(ON_SUBSCRIBE, data, &reply); |
| return status; |
| } |
| |
| virtual void onPropertyUnsubscribe(int32_t property) { |
| Parcel data, reply; |
| data.writeInterfaceToken(IVehicleNetworkHalMock::getInterfaceDescriptor()); |
| data.writeInt32(property); |
| status_t status = remote()->transact(ON_UNSUBSCRIBE, data, &reply); |
| if (status != NO_ERROR) { |
| ALOGI("onPropertyUnsubscribe property %d failed %d", property, status); |
| } |
| } |
| }; |
| |
| IMPLEMENT_META_INTERFACE(VehicleNetworkHalMock, IVehicleNetworkHalMock::SERVICE_NAME); |
| |
| // ---------------------------------------------------------------------- |
| |
| static bool isSystemUser() { |
| uid_t uid = IPCThreadState::self()->getCallingUid(); |
| switch (uid) { |
| // This list will be expanded. Only those UIDs are allowed to access vehicle network |
| // for now. There can be per property based UID check built-in as well. |
| case AID_ROOT: |
| case AID_SYSTEM: |
| case AID_AUDIO: { |
| return true; |
| } break; |
| default: { |
| ALOGE("non-system user tried access, uid %d", uid); |
| } break; |
| } |
| return false; |
| } |
| |
| status_t BnVehicleNetworkHalMock::onTransact(uint32_t code, const Parcel& data, Parcel* reply, |
| uint32_t flags) { |
| if (!isSystemUser()) { |
| return PERMISSION_DENIED; |
| } |
| status_t r; |
| switch (code) { |
| case ON_LIST_PROPERTIES: { |
| CHECK_INTERFACE(IVehicleNetworkHalMock, data, reply); |
| sp<VehiclePropertiesHolder> holder = onListProperties(); |
| if (holder.get() == NULL) { // given property not found |
| BinderUtil::fillObjectResultReply(reply, false /* isValid */); |
| return NO_ERROR; |
| } |
| std::unique_ptr<VehiclePropConfigs> configs(new VehiclePropConfigs()); |
| ASSERT_OR_HANDLE_NO_MEMORY(configs.get(), return NO_MEMORY); |
| VehicleNetworkProtoUtil::toVehiclePropConfigs(holder->getList(), *configs.get()); |
| int size = configs->ByteSize(); |
| WritableBlobHolder blob(new Parcel::WritableBlob()); |
| ASSERT_OR_HANDLE_NO_MEMORY(blob.blob, return NO_MEMORY); |
| BinderUtil::fillObjectResultReply(reply, true); |
| reply->writeInt32(size); |
| reply->writeBlob(size, false, blob.blob); |
| configs->SerializeToArray(blob.blob->data(), size); |
| return NO_ERROR; |
| } break; |
| case ON_PROPERTY_SET: { |
| CHECK_INTERFACE(IVehicleNetworkHalMock, data, reply); |
| if (data.readInt32() == 0) { // java side allows passing null with this. |
| return BAD_VALUE; |
| } |
| ScopedVehiclePropValue value; |
| ReadableBlobHolder blob(new Parcel::ReadableBlob()); |
| ASSERT_OR_HANDLE_NO_MEMORY(blob.blob, return NO_MEMORY); |
| int32_t size = data.readInt32(); |
| r = data.readBlob(size, blob.blob); |
| if (r != NO_ERROR) { |
| ALOGE("setProperty:service, cannot read blob"); |
| return r; |
| } |
| std::unique_ptr<VehiclePropValue> v(new VehiclePropValue()); |
| ASSERT_OR_HANDLE_NO_MEMORY(v.get(), return NO_MEMORY); |
| if (!v->ParseFromArray(blob.blob->data(), size)) { |
| ALOGE("setProperty:service, cannot parse data"); |
| return BAD_VALUE; |
| } |
| r = VehicleNetworkProtoUtil::fromVehiclePropValue(*v.get(), value.value); |
| if (r != NO_ERROR) { |
| ALOGE("setProperty:service, cannot convert data"); |
| return BAD_VALUE; |
| } |
| r = onPropertySet(value.value); |
| BinderUtil::fillNoResultReply(reply); |
| return r; |
| } break; |
| case ON_PROPERTY_GET: { |
| CHECK_INTERFACE(IVehicleNetworkHalMock, data, reply); |
| ScopedVehiclePropValue value; |
| r = VehiclePropValueBinderUtil::readFromParcel(data, &value.value, |
| false /* deleteMembers */, true /*canIgnoreNoData*/); |
| if (r != NO_ERROR) { |
| ALOGE("onPropertyGet cannot read %d", r); |
| return r; |
| } |
| r = onPropertyGet(&(value.value)); |
| if (r == NO_ERROR) { |
| BinderUtil::fillObjectResultReply(reply, true); |
| std::unique_ptr<VehiclePropValue> v(new VehiclePropValue()); |
| ASSERT_OR_HANDLE_NO_MEMORY(v.get(), return NO_MEMORY); |
| VehicleNetworkProtoUtil::toVehiclePropValue(value.value, *v.get()); |
| int size = v->ByteSize(); |
| WritableBlobHolder blob(new Parcel::WritableBlob()); |
| ASSERT_OR_HANDLE_NO_MEMORY(blob.blob, return NO_MEMORY); |
| reply->writeInt32(size); |
| reply->writeBlob(size, false, blob.blob); |
| v->SerializeToArray(blob.blob->data(), size); |
| } |
| return r; |
| } break; |
| case ON_SUBSCRIBE: { |
| CHECK_INTERFACE(IVehicleNetworkHalMock, data, reply); |
| int32_t property = data.readInt32(); |
| float sampleRate = data.readFloat(); |
| int32_t zones = data.readInt32(); |
| r = onPropertySubscribe(property, sampleRate, zones); |
| BinderUtil::fillNoResultReply(reply); |
| return r; |
| } break; |
| case ON_UNSUBSCRIBE: { |
| CHECK_INTERFACE(IVehicleNetworkHalMock, data, reply); |
| int32_t property = data.readInt32(); |
| onPropertyUnsubscribe(property); |
| BinderUtil::fillNoResultReply(reply); |
| return NO_ERROR; |
| } break; |
| default: |
| return BBinder::onTransact(code, data, reply, flags); |
| } |
| } |
| |
| }; // namespace android |
