| /* |
| * 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. |
| */ |
| /** |
| * \addtogroup uip6-multicast |
| * @{ |
| */ |
| /** |
| * \file |
| * Multicast routing table manipulation |
| * |
| * \author |
| * George Oikonomou - <oikonomou@users.sourceforge.net> |
| */ |
| |
| #include "contiki.h" |
| #include "lib/list.h" |
| #include "lib/memb.h" |
| #include "contiki/ip/uip.h" |
| #include "contiki/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); |
| } |
| /*---------------------------------------------------------------------------*/ |
| /** @} */ |