automotive/can/1.0/default/libnetdevice/common.cpp

/*
 * Copyright (C) 2019 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.
 */

#include "common.h"

#include <android-base/logging.h>

#include <net/if.h>

namespace android {
namespace netdevice {

unsigned int nametoindex(const std::string& ifname) {
    const auto ifidx = if_nametoindex(ifname.c_str());
    if (ifidx != 0) return ifidx;

    const auto err = errno;
    if (err != ENODEV) {
        LOG(ERROR) << "if_nametoindex(" << ifname << ") failed: " << err;
    }
    return 0;
}

}  // namespace netdevice
}  // namespace android