225 lines
6.8 KiB
C
225 lines
6.8 KiB
C
/****************************************************************************
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* net/route/net_delroute.c
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*
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* Copyright (C) 2013, 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <nuttx/net/ip.h>
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#include "route/route.h"
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#if defined(CONFIG_NET) && defined(CONFIG_NET_ROUTE)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifdef CONFIG_NET_IPv4
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struct route_match_s
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{
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FAR struct net_route_s *prev; /* Predecessor in the list */
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in_addr_t target; /* The target IP address to match */
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in_addr_t netmask; /* The network mask to match */
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};
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#endif
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#ifdef CONFIG_NET_IPv6
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struct route_match_ipv6_s
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{
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FAR struct net_route_ipv6_s *prev; /* Predecessor in the list */
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net_ipv6addr_t target; /* The target IP address to match */
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net_ipv6addr_t netmask; /* The network mask to match */
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};
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Function: net_match
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*
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* Description:
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* Return 1 if the route is available
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*
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* Parameters:
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* route - The next route to examine
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* arg - The match values (cast to void*)
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*
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* Returned Value:
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* 0 if the entry is not a match; 1 if the entry matched and was cleared.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_IPv4
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static int net_match(FAR struct net_route_s *route, FAR void *arg)
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{
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FAR struct route_match_s *match = (FAR struct route_match_s *)arg;
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/* To match, the masked target address must be the same, and the masks
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* must be the same.
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*/
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if (net_ipv4addr_maskcmp(route->target, match->target, match->netmask) &&
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net_ipv4addr_cmp(route->netmask, match->netmask))
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{
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/* They match.. Remove the entry from the routing table */
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if (match->prev)
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{
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(void)sq_remafter((FAR sq_entry_t *)match->prev,
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(FAR sq_queue_t *)&g_routes);
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}
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else
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{
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(void)sq_remfirst((FAR sq_queue_t *)&g_routes);
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}
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/* And free the routing table entry by adding it to the free list */
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net_freeroute(route);
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/* Return a non-zero value to terminate the traversal */
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return 1;
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}
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/* Next time we are here, this will be the previous entry */
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match->prev = route;
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return 0;
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}
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#endif
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#ifdef CONFIG_NET_IPv6
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static int net_match_ipv6(FAR struct net_route_ipv6_s *route, FAR void *arg)
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{
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FAR struct route_match_ipv6_s *match = (FAR struct route_match_ipv6_s *)arg;
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/* To match, the masked target address must be the same, and the masks
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* must be the same.
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*/
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if (net_ipv6addr_maskcmp(route->target, match->target, match->netmask) &&
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net_ipv6addr_cmp(route->netmask, match->netmask))
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{
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/* They match.. Remove the entry from the routing table */
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if (match->prev)
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{
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(void)sq_remafter((FAR sq_entry_t *)match->prev,
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(FAR sq_queue_t *)&g_routes_ipv6);
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}
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else
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{
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(void)sq_remfirst((FAR sq_queue_t *)&g_routes_ipv6);
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}
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/* And free the routing table entry by adding it to the free list */
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net_freeroute_ipv6(route);
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/* Return a non-zero value to terminate the traversal */
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return 1;
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}
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/* Next time we are here, this will be the previous entry */
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match->prev = route;
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return 0;
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: net_delroute
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*
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* Description:
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* Remove an existing route from the routing table
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*
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* Parameters:
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_IPv4
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int net_delroute(in_addr_t target, in_addr_t netmask)
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{
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struct route_match_s match;
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/* Set up the comparison structure */
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match.prev = NULL;
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net_ipv4addr_copy(match.target, target);
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net_ipv4addr_copy(match.netmask, netmask);
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/* Then remove the entry from the routing table */
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return net_foreachroute(net_match, &match) ? OK : -ENOENT;
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}
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#endif
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#ifdef CONFIG_NET_IPv6
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int net_delroute_ipv6(net_ipv6addr_t target, net_ipv6addr_t netmask)
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{
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struct route_match_ipv6_s match;
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/* Set up the comparison structure */
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match.prev = NULL;
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net_ipv6addr_copy(match.target, target);
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net_ipv6addr_copy(match.netmask, netmask);
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/* Then remove the entry from the routing table */
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return net_foreachroute_ipv6(net_match_ipv6, &match) ? OK : -ENOENT;
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}
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#endif
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#endif /* CONFIG_NET && CONFIG_NET_ROUTE */
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