131 lines
4.4 KiB
C
131 lines
4.4 KiB
C
/*
|
|
* Copyright (c) 2011, Loughborough University - Computer Science
|
|
* All rights reserved.
|
|
*
|
|
* 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 of the copyright holder 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 HOLDER 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.
|
|
*/
|
|
/**
|
|
* \file
|
|
* Multicast routing table manipulation
|
|
*
|
|
* \author
|
|
* George Oikonomou - <oikonomou@users.sourceforge.net>
|
|
*/
|
|
|
|
#include "contiki.h"
|
|
#include "lib/list.h"
|
|
#include "lib/memb.h"
|
|
#include "net/ip/uip.h"
|
|
#include "net/ipv6/multicast/uip-mcast6-route.h"
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Size of the multicast routing table */
|
|
#ifdef UIP_MCAST6_ROUTE_CONF_ROUTES
|
|
#define UIP_MCAST6_ROUTE_ROUTES UIP_MCAST6_ROUTE_CONF_ROUTES
|
|
#else
|
|
#define UIP_MCAST6_ROUTE_ROUTES 1
|
|
#endif /* UIP_CONF_DS6_MCAST_ROUTES */
|
|
/*---------------------------------------------------------------------------*/
|
|
LIST(mcast_route_list);
|
|
MEMB(mcast_route_memb, uip_mcast6_route_t, UIP_MCAST6_ROUTE_ROUTES);
|
|
|
|
static uip_mcast6_route_t *locmcastrt;
|
|
/*---------------------------------------------------------------------------*/
|
|
uip_mcast6_route_t *
|
|
uip_mcast6_route_lookup(uip_ipaddr_t *group)
|
|
{
|
|
locmcastrt = NULL;
|
|
for(locmcastrt = list_head(mcast_route_list);
|
|
locmcastrt != NULL;
|
|
locmcastrt = list_item_next(locmcastrt)) {
|
|
if(uip_ipaddr_cmp(&locmcastrt->group, group)) {
|
|
return locmcastrt;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
uip_mcast6_route_t *
|
|
uip_mcast6_route_add(uip_ipaddr_t *group)
|
|
{
|
|
/* _lookup must return NULL, i.e. the prefix does not exist in our table */
|
|
locmcastrt = uip_mcast6_route_lookup(group);
|
|
if(locmcastrt == NULL) {
|
|
/* Allocate an entry and add the group to the list */
|
|
locmcastrt = memb_alloc(&mcast_route_memb);
|
|
if(locmcastrt == NULL) {
|
|
return NULL;
|
|
}
|
|
list_add(mcast_route_list, locmcastrt);
|
|
}
|
|
|
|
/* Reaching here means we either found the prefix or allocated a new one */
|
|
|
|
uip_ipaddr_copy(&(locmcastrt->group), group);
|
|
|
|
return locmcastrt;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uip_mcast6_route_rm(uip_mcast6_route_t *route)
|
|
{
|
|
/* Make sure it's actually in the list */
|
|
for(locmcastrt = list_head(mcast_route_list);
|
|
locmcastrt != NULL;
|
|
locmcastrt = list_item_next(locmcastrt)) {
|
|
if(locmcastrt == route) {
|
|
list_remove(mcast_route_list, route);
|
|
memb_free(&mcast_route_memb, route);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
uip_mcast6_route_t *
|
|
uip_mcast6_route_list_head(void)
|
|
{
|
|
return list_head(mcast_route_list);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
uip_mcast6_route_count(void)
|
|
{
|
|
return list_length(mcast_route_list);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uip_mcast6_route_init()
|
|
{
|
|
memb_init(&mcast_route_memb);
|
|
list_init(mcast_route_list);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|