104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/****************************************************************************
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* netutils/netlib/netlib_delarp.c
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*
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* Copyright (C) 2016 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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#if defined(CONFIG_NET_ARP) && CONFIG_NSOCKET_DESCRIPTORS > 0
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <unistd.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 <netinet/in.h>
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#include <net/if.h>
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#include <nuttx/net/arp.h>
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#include "netutils/netlib.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: netlib_del_arpmapping
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*
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* Description:
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* Delete the hardware address mapping for the provided protocol address.
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*
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* Parameters:
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* inaddr The IPv4 address to use in the query
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*
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* Return:
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* 0 on success; a negated errno value on failure.
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*
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****************************************************************************/
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int netlib_del_arpmapping(FAR const struct sockaddr_in *inaddr)
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{
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int ret = -EINVAL;
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if (inaddr != NULL)
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{
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int sockfd = socket(PF_INET, NETLIB_SOCK_TYPE, 0);
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if (sockfd >= 0)
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{
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struct arpreq req;
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memcpy(&req.arp_pa, inaddr, sizeof(struct sockaddr_in));
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memset(&req.arp_ha, 0, sizeof(struct sockaddr_in));
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ret = ioctl(sockfd, SIOCDARP, (unsigned long)((uintptr_t)&req));
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if (ret < 0)
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{
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ret = -errno;
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DEBUGASSERT(ret < 0);
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}
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close(sockfd);
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}
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}
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return ret;
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}
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#endif /* CONFIG_NET_ARP && CONFIG_NSOCKET_DESCRIPTORS */
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