135 lines
4.4 KiB
C
135 lines
4.4 KiB
C
/****************************************************************************
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* net/netdev/netdev_indextoname.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <net/if.h>
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#include "nuttx/net/net.h"
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#include "nuttx/net/netdev.h"
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#include "netdev/netdev.h"
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#ifdef CONFIG_NETDEV_IFINDEX
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: netdev_indextoname
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*
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* Description:
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* The if_indextoname() function maps an interface index to its
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* corresponding name.
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*
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* Input Parameters:
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* ifname - Points to a buffer of at least IF_NAMESIZE bytes.
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* if_indextoname() will place in this buffer the name of the
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* interface with index ifindex.
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*
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* Returned Value:
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* If ifindex is an interface index, then the function will return zero
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* (OK). Otherwise, the function returns a negated errno value;
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*
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****************************************************************************/
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int netdev_indextoname(unsigned int ifindex, FAR char *ifname)
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{
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FAR struct net_driver_s *dev;
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int ret = -ENODEV;
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DEBUGASSERT(ifindex > 0 && ifindex <= MAX_IFINDEX);
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DEBUGASSERT(ifname != NULL);
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/* Find the driver with this name */
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net_lock();
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dev = netdev_findbyindex(ifindex);
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if (dev != NULL)
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{
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memcpy(ifname, dev->d_ifname, IF_NAMESIZE);
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ret = OK;
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}
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net_unlock();
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return ret;
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}
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/****************************************************************************
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* Name: if_indextoname
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*
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* Description:
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* The if_indextoname() function maps an interface index to its
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* corresponding name.
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*
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* Input Parameters:
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* ifname - Points to a buffer of at least IF_NAMESIZE bytes.
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* if_indextoname() will place in this buffer the name of the
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* interface with index ifindex.
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*
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* Returned Value:
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* If ifindex is an interface index, then the function will return the
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* value supplied by ifname. Otherwise, the function returns a NULL pointer
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* and sets errno to indicate the error.
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*
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****************************************************************************/
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FAR char *if_indextoname(unsigned int ifindex, FAR char *ifname)
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{
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int ret;
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/* Let netdev_indextoname to the work */
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ret = netdev_indextoname(ifindex, ifname);
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if (ret < 0)
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{
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set_errno(-ret);
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return NULL;
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}
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return ifname;
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}
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#endif /* CONFIG_NETDEV_IFINDEX */
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