100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
/****************************************************************************
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* apps/netutils/netlib/netlib_delarp.c
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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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#ifdef CONFIG_NET_ARP
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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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* ifname The Network device name
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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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FAR const char *ifname)
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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(NET_SOCK_FAMILY, NET_SOCK_TYPE, NET_SOCK_PROTOCOL);
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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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if (ifname != NULL)
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{
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strlcpy((FAR char *)&req.arp_dev, ifname,
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sizeof(req.arp_dev));
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}
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else
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{
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req.arp_dev[0] = '\0';
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}
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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 */
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