fb94d50410
typedef union uip_ip4addr_t {
u16_t u16[2];
u8_t u8[4];
} uip_ip4addr_t;
typedef uip_ip4addr_t uip_ipaddr_t;
This implies that one must consistently pass pointers to
uip_ipaddr_t:s and not mix and match pointers with
uip_ipaddr_t:s as was done earlier.
132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 2006, Swedish Institute of 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* $Id: uaodv-rt.c,v 1.2 2006/08/09 16:13:39 bg- Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* Routing tables for the micro implementation of the AODV ad hoc routing protocol
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
|
|
#include "net/uaodv-rt.h"
|
|
#include "contiki-net.h"
|
|
|
|
#define NUM_RT_ENTRIES 8
|
|
|
|
/*
|
|
* LRU (with respect to insertion time) list of route entries.
|
|
*/
|
|
LIST(route_table);
|
|
MEMB(route_mem, struct uaodv_rt_entry, NUM_RT_ENTRIES);
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uaodv_rt_init(void)
|
|
{
|
|
list_init(route_table);
|
|
memb_init(&route_mem);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
uaodv_rt_add(uip_ipaddr_t *dest, uip_ipaddr_t *nexthop,
|
|
u16_t hop_count, u32_t seqno)
|
|
{
|
|
struct uaodv_rt_entry *e;
|
|
|
|
/* Avoid inserting duplicate entries. */
|
|
e = uaodv_rt_lookup(dest);
|
|
if(e != NULL) {
|
|
list_remove(route_table, e);
|
|
} else {
|
|
/* Allocate a new entry or reuse the oldest. */
|
|
e = memb_alloc(&route_mem);
|
|
if(e == NULL) {
|
|
e = list_chop(route_table); /* Remove oldest entry. */
|
|
}
|
|
}
|
|
|
|
uip_ipaddr_copy(&e->dest, dest);
|
|
uip_ipaddr_copy(&e->nexthop, nexthop);
|
|
e->hop_count = hop_count;
|
|
e->seqno = seqno;
|
|
|
|
/* New entry goes first. */
|
|
list_push(route_table, e);
|
|
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
struct uaodv_rt_entry *
|
|
uaodv_rt_lookup(uip_ipaddr_t *dest)
|
|
{
|
|
struct uaodv_rt_entry *e;
|
|
|
|
for(e = list_head(route_table); e != NULL; e = e->next) {
|
|
/* printf("uaodv_rt_lookup: comparing %d.%d.%d.%d with %d.%d.%d.%d\n",
|
|
uip_ipaddr1(dest),
|
|
uip_ipaddr2(dest),
|
|
uip_ipaddr3(dest),
|
|
uip_ipaddr4(dest),
|
|
uip_ipaddr1(&e->dest),
|
|
uip_ipaddr2(&e->dest),
|
|
uip_ipaddr3(&e->dest),
|
|
uip_ipaddr4(&e->dest));*/
|
|
|
|
if(uip_ipaddr_cmp(dest, &e->dest)) {
|
|
return e;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uaodv_rt_remove(struct uaodv_rt_entry *e)
|
|
{
|
|
list_remove(route_table, e);
|
|
memb_free(&route_mem, e);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uaodv_rt_flush_all(void)
|
|
{
|
|
struct uaodv_rt_entry *e;
|
|
|
|
while (1) {
|
|
e = list_pop(route_table);
|
|
if(e != NULL)
|
|
memb_free(&route_mem, e);
|
|
else
|
|
break;
|
|
}
|
|
}
|