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net/arp: clean the arp table when netdev carrier off

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Fix the arp address changed if netdev renew, since the
arp table should be cleared when the netdev carrier off

Signed-off-by: songlinzhang <songlinzhang@xiaomi.com>
This commit is contained in:
songlinzhang 2021-11-18 13:29:25 +08:00 • committed by Xiang Xiao
parent 4db9513658
commit 22df553443
7 changed files with 104 additions and 18 deletions
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40
net/netdev/netdev_ioctl.c
View file

@ -1222,6 +1222,40 @@ static int netdev_imsf_ioctl(FAR struct socket *psock, int cmd,
}
#endif
/****************************************************************************
* Name: netdev_arp_callback
*
* Description:
* This is a callback that checks if the Ethernet network device has the
* indicated name
*
* Input Parameters:
* dev Ethernet driver device structure
* req The argument of the ioctl cmd
*
* Returned Value:
* 1 on success
* 0 on error
****************************************************************************/
#ifdef CONFIG_NET_ARP
static int netdev_arp_callback(FAR struct net_driver_s *dev, FAR void *arg)
{
FAR struct arpreq *req = arg;
FAR struct sockaddr_in *addr = (FAR struct sockaddr_in *)&req->arp_pa;
if (strncmp(dev->d_ifname, (FAR const char *)req->arp_dev,
sizeof(dev->d_ifname)))
{
return 0;
}
arp_update(dev, addr->sin_addr.s_addr,
(FAR uint8_t *)req->arp_ha.sa_data);
return 1;
}
#endif
/****************************************************************************
* Name: netdev_arp_ioctl
*
@ -1256,15 +1290,11 @@ static int netdev_arp_ioctl(FAR struct socket *psock, int cmd,
req->arp_pa.sa_family == AF_INET &&
req->arp_ha.sa_family == ARPHRD_ETHER)
{
FAR struct sockaddr_in *addr =
(FAR struct sockaddr_in *)&req->arp_pa;
/* Update any existing ARP table entry for this protocol
* address -OR- add a new ARP table entry if there is not.
*/
ret = arp_update(addr->sin_addr.s_addr,
(FAR uint8_t *)req->arp_ha.sa_data);
ret = netdev_foreach(netdev_arp_callback, req) ? OK : -EINVAL;
}
else
{