xref: /aosp_15_r20/hardware/interfaces/automotive/can/aidl/default/CanBusVirtual.cpp (revision 4d7e907c777eeecc4c5bd7cf640a754fac206ff7)
1*4d7e907cSAndroid Build Coastguard Worker /*
2*4d7e907cSAndroid Build Coastguard Worker  * Copyright 2022, The Android Open Source Project
3*4d7e907cSAndroid Build Coastguard Worker  *
4*4d7e907cSAndroid Build Coastguard Worker  * Licensed under the Apache License, Version 2.0 (the "License");
5*4d7e907cSAndroid Build Coastguard Worker  * you may not use this file except in compliance with the License.
6*4d7e907cSAndroid Build Coastguard Worker  * You may obtain a copy of the License at
7*4d7e907cSAndroid Build Coastguard Worker  *
8*4d7e907cSAndroid Build Coastguard Worker  *     http://www.apache.org/licenses/LICENSE-2.0
9*4d7e907cSAndroid Build Coastguard Worker  *
10*4d7e907cSAndroid Build Coastguard Worker  * Unless required by applicable law or agreed to in writing, software
11*4d7e907cSAndroid Build Coastguard Worker  * distributed under the License is distributed on an "AS IS" BASIS,
12*4d7e907cSAndroid Build Coastguard Worker  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*4d7e907cSAndroid Build Coastguard Worker  * See the License for the specific language governing permissions and
14*4d7e907cSAndroid Build Coastguard Worker  * limitations under the License.
15*4d7e907cSAndroid Build Coastguard Worker  */
16*4d7e907cSAndroid Build Coastguard Worker 
17*4d7e907cSAndroid Build Coastguard Worker #include "CanBusVirtual.h"
18*4d7e907cSAndroid Build Coastguard Worker 
19*4d7e907cSAndroid Build Coastguard Worker #include <android-base/logging.h>
20*4d7e907cSAndroid Build Coastguard Worker #include <libnetdevice/libnetdevice.h>
21*4d7e907cSAndroid Build Coastguard Worker 
22*4d7e907cSAndroid Build Coastguard Worker namespace aidl::android::hardware::automotive::can {
23*4d7e907cSAndroid Build Coastguard Worker 
24*4d7e907cSAndroid Build Coastguard Worker using namespace ::android;
25*4d7e907cSAndroid Build Coastguard Worker 
CanBusVirtual(const std::string & ifname)26*4d7e907cSAndroid Build Coastguard Worker CanBusVirtual::CanBusVirtual(const std::string& ifname) : CanBus(ifname) {}
27*4d7e907cSAndroid Build Coastguard Worker 
preUp()28*4d7e907cSAndroid Build Coastguard Worker Result CanBusVirtual::preUp() {
29*4d7e907cSAndroid Build Coastguard Worker     if (netdevice::exists(mIfname)) return Result::OK;
30*4d7e907cSAndroid Build Coastguard Worker 
31*4d7e907cSAndroid Build Coastguard Worker     LOG(DEBUG) << "Virtual interface " << mIfname << " doesn't exist, creating...";
32*4d7e907cSAndroid Build Coastguard Worker     mWasCreated = true;
33*4d7e907cSAndroid Build Coastguard Worker     if (!netdevice::add(mIfname, "vcan")) {
34*4d7e907cSAndroid Build Coastguard Worker         LOG(ERROR) << "Can't create vcan interface " << mIfname;
35*4d7e907cSAndroid Build Coastguard Worker         return Result::UNKNOWN_ERROR;
36*4d7e907cSAndroid Build Coastguard Worker     }
37*4d7e907cSAndroid Build Coastguard Worker 
38*4d7e907cSAndroid Build Coastguard Worker     return Result::OK;
39*4d7e907cSAndroid Build Coastguard Worker }
40*4d7e907cSAndroid Build Coastguard Worker 
postDown()41*4d7e907cSAndroid Build Coastguard Worker bool CanBusVirtual::postDown() {
42*4d7e907cSAndroid Build Coastguard Worker     if (mWasCreated) {
43*4d7e907cSAndroid Build Coastguard Worker         mWasCreated = false;
44*4d7e907cSAndroid Build Coastguard Worker         if (!netdevice::del(mIfname)) {
45*4d7e907cSAndroid Build Coastguard Worker             LOG(ERROR) << "Couldn't remove vcan interface " << mIfname;
46*4d7e907cSAndroid Build Coastguard Worker             return false;
47*4d7e907cSAndroid Build Coastguard Worker         }
48*4d7e907cSAndroid Build Coastguard Worker     }
49*4d7e907cSAndroid Build Coastguard Worker     return true;
50*4d7e907cSAndroid Build Coastguard Worker }
51*4d7e907cSAndroid Build Coastguard Worker 
52*4d7e907cSAndroid Build Coastguard Worker }  // namespace aidl::android::hardware::automotive::can
53