/****************************************************************************
* netutils/netlib/netlib_getmacaddr.c
*
* Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <netinet/in.h>
#include <net/if.h>
#include <apps/netutils/netlib.h>
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Name: netlib_getmacaddr
*
* Description:
* Get the network driver IP address
*
* Parameters:
* ifname The name of the interface to use
* macaddr The location to return the MAC address
*
* Return:
* 0 on sucess; -1 on failure
*
****************************************************************************/
int netlib_getmacaddr(const char *ifname, uint8_t *macaddr)
{
int ret = ERROR;
if (ifname && macaddr)
{
/* Get a socket (only so that we get access to the INET subsystem) */
int sockfd = socket(PF_INET, NETLIB_SOCK_IOCTL, 0);
if (sockfd >= 0)
{
struct ifreq req;
memset (&req, 0, sizeof(struct ifreq));
/* Put the driver name into the request */
strncpy(req.ifr_name, ifname, IFNAMSIZ);
/* Perform the ioctl to get the MAC address */
ret = ioctl(sockfd, SIOCGIFHWADDR, (unsigned long)&req);
if (!ret)
{
/* Return the MAC address */
memcpy(macaddr, &req.ifr_hwaddr.sa_data, IFHWADDRLEN);
}
close(sockfd);
}
}
return ret;
}
#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */
