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c62d0d0875
Improve the behavior of the ARP table so that the manually configured ARP table has the highest priority, can only be manually modified to other values, otherwise will never change again, and will not time out. Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/****************************************************************************
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* apps/netutils/netlib/netlib_setarp.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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#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/arp.h>
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#include <netinet/in.h>
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#include <net/if.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_set_arpmapping
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*
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* Description:
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* Add the current hardware address mapping for the provided protocol
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* address to the ARP table.
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*
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* Parameters:
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* inaddr The IPv4 address to use in the mapping
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* macaddr The Ethernet MAC address to use in the mapping
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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_set_arpmapping(FAR const struct sockaddr_in *inaddr,
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FAR const uint8_t *macaddr, FAR const char *ifname)
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{
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int ret = -EINVAL;
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if (inaddr != NULL && macaddr != 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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req.arp_ha.sa_family = ARPHRD_ETHER;
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memcpy(&req.arp_ha.sa_data, macaddr, ETHER_ADDR_LEN);
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req.arp_flags = ATF_PERM;
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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, SIOCSARP, (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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