1 /* 2 * Copyright 2022, 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 aidl::android::hardware::automotive::can { 24 25 using namespace ::android; 26 CanBusNative(const std::string & ifname,uint32_t bitrate)27CanBusNative::CanBusNative(const std::string& ifname, uint32_t bitrate) 28 : CanBus(ifname), mBitrate(bitrate) {} 29 preUp()30Result CanBusNative::preUp() { 31 if (!netdevice::exists(mIfname)) { 32 LOG(ERROR) << "Interface " << mIfname << " doesn't exist"; 33 return Result::BAD_INTERFACE_ID; 34 } 35 36 if (mBitrate == 0) { 37 // interface is already up and we just want to register it 38 return Result::OK; 39 } 40 41 if (!netdevice::down(mIfname)) { 42 LOG(ERROR) << "Can't bring " << mIfname << " down (to configure it)"; 43 return Result::UNKNOWN_ERROR; 44 } 45 46 if (!netdevice::can::setBitrate(mIfname, mBitrate)) { 47 LOG(ERROR) << "Can't set bitrate " << mBitrate << " for " << mIfname; 48 return Result::BAD_BITRATE; 49 } 50 51 return Result::OK; 52 } 53 54 } // namespace aidl::android::hardware::automotive::can 55