242 lines
7.4 KiB
C
242 lines
7.4 KiB
C
/****************************************************************************
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* net/route/net_del_ramroute.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <debug.h>
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#include <arpa/inet.h>
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#include <nuttx/net/ip.h>
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#include "netlink/netlink.h"
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#include "route/ramroute.h"
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#include "route/route.h"
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#if defined(CONFIG_ROUTE_IPv4_RAMROUTE) || defined(CONFIG_ROUTE_IPv6_RAMROUTE)
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/****************************************************************************
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* Private Types
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****************************************************************************/
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#ifdef CONFIG_ROUTE_IPv4_RAMROUTE
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struct route_match_ipv4_s
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{
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FAR struct net_route_ipv4_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_ROUTE_IPv6_RAMROUTE
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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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* Name: net_del_ipv4route
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*
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* Description:
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* Return 1 if the route is available, and delete the match route
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*
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* Input 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_ROUTE_IPv4_RAMROUTE
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static int net_del_ipv4route(FAR struct net_route_ipv4_s *route,
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FAR void *arg)
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{
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FAR struct route_match_ipv4_s *match =
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(FAR struct route_match_ipv4_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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net_ipv4_dumproute("Comparing", route);
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ninfo("With:\n");
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ninfo(" target=%08" PRIx32 " netmask=%08" PRIx32 "\n",
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HTONL(match->target), HTONL(match->netmask));
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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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ramroute_ipv4_remafter(
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(FAR struct net_route_ipv4_entry_s *)match->prev,
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&g_ipv4_routes);
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}
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else
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{
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ramroute_ipv4_remfirst(&g_ipv4_routes);
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}
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netlink_route_notify(route, RTM_DELROUTE, AF_INET);
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/* And free the routing table entry by adding it to the free list */
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net_freeroute_ipv4(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_ROUTE_IPv6_RAMROUTE
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static int net_del_ipv6route(FAR struct net_route_ipv6_s *route,
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FAR void *arg)
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{
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FAR struct route_match_ipv6_s *match =
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(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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net_ipv6_dumproute("Comparing", route);
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ninfo("With:\n");
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ninfo(" target: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
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HTONS(match->target[0]), HTONS(match->target[1]),
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HTONS(match->target[2]), HTONS(match->target[3]),
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HTONS(match->target[4]), HTONS(match->target[5]),
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HTONS(match->target[6]), HTONS(match->target[7]));
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ninfo(" netmask: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
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HTONS(match->netmask[0]), HTONS(match->netmask[1]),
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HTONS(match->netmask[2]), HTONS(match->netmask[3]),
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HTONS(match->netmask[4]), HTONS(match->netmask[5]),
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HTONS(match->netmask[6]), HTONS(match->netmask[7]));
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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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ramroute_ipv6_remafter(
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(FAR struct net_route_ipv6_entry_s *)match->prev,
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&g_ipv6_routes);
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}
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else
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{
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ramroute_ipv6_remfirst(&g_ipv6_routes);
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}
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netlink_route_notify(route, RTM_DELROUTE, AF_INET6);
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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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* Name: net_delroute_ipv4 and net_delroute_ipv6
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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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* Input 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_ROUTE_IPv4_RAMROUTE
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int net_delroute_ipv4(in_addr_t target, in_addr_t netmask)
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{
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struct route_match_ipv4_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_ipv4(net_del_ipv4route, &match) ? OK : -ENOENT;
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}
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#endif
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#ifdef CONFIG_ROUTE_IPv6_RAMROUTE
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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_del_ipv6route, &match) ? OK : -ENOENT;
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}
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#endif
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#endif /* CONFIG_ROUTE_IPv4_RAMROUTE || CONFIG_ROUTE_IPv6_RAMROUTE */
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