86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/****************************************************************************
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* net/netdev/netdev_foreach.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include <nuttx/net/netdev.h>
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#include "netdev/netdev.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: netdev_foreach
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*
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* Description:
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* Enumerate each registered network device. This function will terminate
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* when either (1) all devices have been enumerated or (2) when a callback
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* returns any non-zero value.
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*
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* NOTE 1: The network must be locked throughout the enumeration.
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* NOTE 2: No checks are made on devices. For examples, callbacks will
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* will be made on network devices that are in the 'down' state.
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* The callback implementations must take into account all
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* network device state. Typically, a network in the down state
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* would not terminate the traversal.
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*
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* Input Parameters:
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* callback - Will be called for each registered device
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* arg - Opaque user argument passed to callback()
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*
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* Returned Value:
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* 0: Enumeration completed
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* 1: Enumeration terminated early by callback
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*
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* Assumptions:
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* The network is locked.
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*
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****************************************************************************/
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int netdev_foreach(netdev_callback_t callback, FAR void *arg)
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{
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FAR struct net_driver_s *dev;
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int ret = 0;
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if (callback != NULL)
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{
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for (dev = g_netdevices; dev; dev = dev->flink)
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{
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if (callback(dev, arg) != 0)
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{
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ret = 1;
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break;
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}
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}
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}
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return ret;
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}
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