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ARP: Add IOCTL commands to manage the ARP table

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This commit is contained in:
Gregory Nutt
2016-02-08 11:17:22 -06:00
parent 74db48202e
commit 0af9a197ac
9 changed files with 312 additions and 75 deletions
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net/netdev/netdev_ioctl.c
+137
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@@ -57,12 +57,14 @@
#include <netinet/in.h>
#include <nuttx/net/netdev.h>
#include <nuttx/net/arp.h>
#ifdef CONFIG_NET_IGMP
# include "sys/sockio.h"
# include "nuttx/net/igmp.h"
#endif
#include "arp/arp.h"
#include "socket/socket.h"
#include "netdev/netdev.h"
#include "devif/devif.h"
@@ -808,6 +810,129 @@ static int netdev_imsfioctl(FAR struct socket *psock, int cmd,
}
#endif
/****************************************************************************
* Name: netdev_arpioctl
*
* Description:
* Perform ARP table specific operations.
*
* Parameters:
* psock Socket structure
* dev Ethernet driver device structure
* cmd The ioctl command
* req The argument of the ioctl cmd
*
* Return:
* >=0 on success (positive non-zero values are cmd-specific)
* Negated errno returned on failure.
*
****************************************************************************/
#ifdef CONFIG_NET_ARP
static int netdev_arpioctl(FAR struct socket *psock, int cmd,
FAR struct arpreq *req)
{
int ret;
/* Execute the command */
switch (cmd)
{
case SIOCSARP: /* Set an ARP mapping */
{
if (req != NULL &&
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);
}
else
{
ret = -EINVAL;
}
}
break;
case SIOCDARP: /* Delete an ARP mapping */
{
if (req != NULL && req->arp_pa.sa_family == AF_INET)
{
FAR struct sockaddr_in *addr =
(FAR struct sockaddr_in *)&req->arp_pa;
/* Find the existing ARP table entry for this protocol address. */
FAR struct arp_entry *entry = arp_find(addr->sin_addr.s_addr);
if (entry != NULL)
{
/* The ARP table is fixed size; an entry is deleted
* by nullifying its protocol address.
*/
entry->at_ipaddr = 0;
ret = OK;
}
else
{
ret = -ENOENT;
}
}
else
{
ret = -EINVAL;
}
}
break;
case SIOCGARP: /* Get an ARP mapping */
{
if (req != NULL && req->arp_pa.sa_family == AF_INET)
{
FAR struct sockaddr_in *addr =
(FAR struct sockaddr_in *)&req->arp_pa;
/* Find the existing ARP table entry for this protocol address. */
FAR struct arp_entry *entry = arp_find(addr->sin_addr.s_addr);
if (entry != NULL)
{
/* Return the mapped hardware address. */
req->arp_ha.sa_family = ARPHRD_ETHER;
memcpy(req->arp_ha.sa_data,
entry->at_ethaddr.ether_addr_octet,
ETHER_ADDR_LEN);
ret = OK;
}
else
{
ret = -ENOENT;
}
}
else
{
ret = -EINVAL;
}
}
break;
default:
ret = -ENOTTY;
break;
}
return ret;
}
#endif
/****************************************************************************
* Name: netdev_rtioctl
*
@@ -972,6 +1097,18 @@ int netdev_ioctl(int sockfd, int cmd, unsigned long arg)
ret = netdev_imsfioctl(psock, cmd, (FAR struct ip_msfilter *)((uintptr_t)arg));
}
#endif
/* Check for ARP table IOCTL commands */
#ifdef CONFIG_NET_ARP
if (ret == -ENOTTY)
{
ret = netdev_arpioctl(psock, cmd, (FAR struct arpreq *)((uintptr_t)arg));
}
#endif
/* Check for Routing table IOCTL commands */
#ifdef CONFIG_NET_ROUTE
if (ret == -ENOTTY)
{