/****************************************************************************
* 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 "net.h"
#include "net_route.h"
#if defined(CONFIG_NET) && defined(CONFIG_NET_ROUTE)
/****************************************************************************
* Public Types
****************************************************************************/
struct route_match_s
{
FAR struct net_route_s *prev; /* Predecessor in the list */
uip_ipaddr_t target; /* The target IP address to match */
uip_ipaddr_t netmask; /* The network mask to match */
};
/****************************************************************************
* 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 masked target address must be the same, and the masks
* must be the same.
*/
if (uip_ipaddr_maskcmp(route->target, match->target, match->netmask) &&
uip_ipaddr_cmp(route->netmask, match->netmask))
{
/* They match.. Remove the entry from the routing table */
if (match->prev)
{
(void)sq_remafter((FAR sq_entry_t *)match->prev,
(FAR sq_queue_t *)&g_routes);
}
else
{
(void)sq_remfirst((FAR sq_queue_t *)&g_routes);
}
/* And free the routing table entry by adding it to the free list */
net_freeroute(route);
/* Return a non-zero value to terminate the traversal */
return 1;
}
/* Next time we are here, this will be the previous entry */
match->prev = route;
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: net_delroute
*
* Description:
* Remove an existing route from the routing table
*
* Parameters:
*
* Returned Value:
* OK on success; Negated errno on failure.
*
****************************************************************************/
int net_delroute(uip_ipaddr_t target, uip_ipaddr_t netmask)
{
struct route_match_s match;
/* Set up the comparison structure */
match.prev = NULL;
uip_ipaddr_copy(match.target, target);
uip_ipaddr_copy(match.netmask, netmask);
/* Then remove the entry from the routing table */
return net_foreachroute(net_match, &match) ? OK : -ENOENT;
}
#endif /* CONFIG_NET && CONFIG_NET_SOCKOPTS && !CONFIG_DISABLE_CLOCK */
