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/****************************************************************************
* net/net_delroute.c
*
* Copyright (C) 2013 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 NuttX 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 COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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 <stdint.h>
#include <string.h>
#include <errno.h>
#include <nuttx/net/route.h>
#include "net_internal.h"
#if defined(CONFIG_NET) && defined(CONFIG_NET_ROUTE)
/****************************************************************************
* Public Types
****************************************************************************/
struct route_match_s
{
uip_ipaddr_t target; /* The target IP address to match */
FAR struct net_route_s *route; /* The location to return the route */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Function: net_match
*
* Description:
* Return 1 if the route is available
*
* Parameters:
* route - The next route to examine
* arg - The match values (cast to void*)
*
* Returned Value:
* 0 if the entry is not a match; 1 if the entry matched and was cleared.
*
****************************************************************************/
static int net_match(FAR struct net_route_s *route, FAR void *arg)
{
FAR struct route_match_s *match = ( FAR struct route_match_s *)arg;
/* To match, the entry has to be in use, the masked target addresses must
* be the same. In the event of multiple matches, only the first is
* returned.
*/
if (route->inuse &&
uip_ipaddr_maskcmp(route->target, match->target, route->netmask))
{
/* They match.. clear the route table entry */
memcpy(match->route, route, sizeof(struct net_route_s));
return 1;
}
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: net_findroute
*
* Description:
* Given an IP address, return a copy of the routing table contents
*
* Parameters:
*
* Returned Value:
* OK on success; Negated errno on failure.
*
****************************************************************************/
int net_findroute(uip_ipaddr_t target, FAR struct net_route_s *route)
{
struct route_match_s match;
/* Set up the comparison structure */
uip_ipaddr_copy(match.target, target);
match.route = route;
/* Then remove the entry from the routing table */
return net_foreachroute(net_match, &match) ? OK : -ENOENT;
}
#endif /* CONFIG_NET && CONFIG_NET_ROUTE */
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