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 #pragma once
18 
19 #include <linux/can.h>
20 #include <net/if.h>
21 
22 #include <string>
23 
24 namespace android::netdevice {
25 
26 /**
27  * Returns the index of a given network interface.
28  *
29  * If the syscall to check the index fails with other error than ENODEV, it gets logged and the
30  * return value indicates the interface doesn't exists.
31  *
32  * \param ifname Interface to check
33  * \return Interface index, or 0 if the interface doesn't exist
34  */
35 unsigned int nametoindex(const std::string& ifname);
36 
37 }  // namespace android::netdevice
38