106 lines
3.8 KiB
C
106 lines
3.8 KiB
C
|
/****************************************************************************
|
||
|
|
* net/neighbor/neighbor_snapshot.c
|
||
|
|
*
|
||
|
|
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
|
||
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
*
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Included Files
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#include <nuttx/config.h>
|
||
|
|
|
||
|
|
#include <string.h>
|
||
|
|
#include <debug.h>
|
||
|
|
|
||
|
|
#include <nuttx/net/ip.h>
|
||
|
|
|
||
|
|
#include "inet/inet.h"
|
||
|
|
#include "neighbor/neighbor.h"
|
||
|
|
|
||
|
|
#ifdef CONFIG_NETLINK_ROUTE
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Functions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Name: neighbor_snapshot
|
||
|
|
*
|
||
|
|
* Description:
|
||
|
|
* Take a snapshot of the current state of the Neighbor table.
|
||
|
|
*
|
||
|
|
* Input Parameters:
|
||
|
|
* snapshot - Location to return the Neighbor table copy
|
||
|
|
* nentries - The size of the user provided 'dest' in entries, each of
|
||
|
|
* size sizeof(struct arp_entry_s)
|
||
|
|
*
|
||
|
|
* Returned Value:
|
||
|
|
* On success, the number of entries actually copied is returned. Unused
|
||
|
|
* entries are not returned.
|
||
|
|
*
|
||
|
|
* Assumptions
|
||
|
|
* The network is locked to assure exclusive access to the ARP table
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
unsigned int neighbor_snapshot(FAR struct neighbor_entry_s *snapshot,
|
||
|
|
unsigned int nentries)
|
||
|
|
{
|
||
|
|
unsigned int ncopied;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
/* Copy all non-empty entries in the Neighbor table. */
|
||
|
|
|
||
|
|
for (i = 0, ncopied = 0;
|
||
|
|
nentries > ncopied && i < CONFIG_NET_IPv6_NCONF_ENTRIES;
|
||
|
|
i++)
|
||
|
|
{
|
||
|
|
FAR struct neighbor_entry_s *neighbor = &g_neighbors[i];
|
||
|
|
|
||
|
|
/* An unused entry table entry will be nullified. In particularly,
|
||
|
|
* the Neighbor IP address will be all zero (i.e., the unspecified
|
||
|
|
* IPv6 address).
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (!net_ipv6addr_cmp(neighbor->ne_ipaddr, g_ipv6_unspecaddr))
|
||
|
|
{
|
||
|
|
memcpy(&snapshot[ncopied], neighbor, sizeof(struct neighbor_entry_s));
|
||
|
|
ncopied++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Return the number of entries copied into the user buffer */
|
||
|
|
|
||
|
|
return ncopied;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CONFIG_NETLINK_ROUTE */
|