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author | Gregory Nutt <gnutt@nuttx.org> | 2013-10-01 18:55:20 -0600 |
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committer | Gregory Nutt <gnutt@nuttx.org> | 2013-10-01 18:55:20 -0600 |
commit | b4e9e42b45494e19fd131ea02e2c01745de855a5 (patch) | |
tree | 5f910c9c9d04e9e935540dd3a28c9bef45ec813f /nuttx/net/net_delroute.c | |
parent | c862629efea1eda999029d6a70ad588f20ffeb9f (diff) | |
download | px4-nuttx-b4e9e42b45494e19fd131ea02e2c01745de855a5.tar.gz px4-nuttx-b4e9e42b45494e19fd131ea02e2c01745de855a5.tar.bz2 px4-nuttx-b4e9e42b45494e19fd131ea02e2c01745de855a5.zip |
Partial implementation of a simple network routing table.
Diffstat (limited to 'nuttx/net/net_delroute.c')
-rw-r--r-- | nuttx/net/net_delroute.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/nuttx/net/net_delroute.c b/nuttx/net/net_delroute.c new file mode 100644 index 000000000..08d9ad154 --- /dev/null +++ b/nuttx/net/net_delroute.c @@ -0,0 +1,132 @@ +/**************************************************************************** + * 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 <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); + 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_ROUTE */ |