incubator-nuttx/net/netdev/netdev_findbyname.c

77 lines
2.3 KiB
C

/****************************************************************************
* net/netdev/netdev_findbyname.c
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <string.h>
#include <errno.h>
#include <nuttx/net/netdev.h>
#include "utils/utils.h"
#include "netdev/netdev.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: netdev_findbyname
*
* Description:
* Find a previously registered network device using its assigned
* network interface name
*
* Input Parameters:
* ifname The interface name of the device of interest
*
* Returned Value:
* Pointer to driver on success; null on failure
*
****************************************************************************/
FAR struct net_driver_s *netdev_findbyname(FAR const char *ifname)
{
FAR struct net_driver_s *dev;
if (ifname)
{
net_lock();
for (dev = g_netdevices; dev; dev = dev->flink)
{
if (strcmp(ifname, dev->d_ifname) == 0)
{
net_unlock();
return dev;
}
}
net_unlock();
}
return NULL;
}