1 /* 2 * Copyright (C) 2019 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 #include "CanBusNative.h" 18 19 #include <android-base/logging.h> 20 #include <libnetdevice/can.h> 21 #include <libnetdevice/libnetdevice.h> 22 23 namespace android::hardware::automotive::can::V1_0::implementation { 24 CanBusNative(const std::string & ifname,uint32_t bitrate)25CanBusNative::CanBusNative(const std::string& ifname, uint32_t bitrate) 26 : CanBus(ifname), mBitrate(bitrate) {} 27 preUp()28ICanController::Result CanBusNative::preUp() { 29 if (!netdevice::exists(mIfname)) { 30 LOG(ERROR) << "Interface " << mIfname << " doesn't exist"; 31 return ICanController::Result::BAD_INTERFACE_ID; 32 } 33 34 if (mBitrate == 0) { 35 // interface is already up and we just want to register it 36 return ICanController::Result::OK; 37 } 38 39 if (!netdevice::down(mIfname)) { 40 LOG(ERROR) << "Can't bring " << mIfname << " down (to configure it)"; 41 return ICanController::Result::UNKNOWN_ERROR; 42 } 43 44 if (!netdevice::can::setBitrate(mIfname, mBitrate)) { 45 LOG(ERROR) << "Can't set bitrate " << mBitrate << " for " << mIfname; 46 return ICanController::Result::BAD_BITRATE; 47 } 48 49 return ICanController::Result::OK; 50 } 51 52 } // namespace android::hardware::automotive::can::V1_0::implementation 53