157 lines
4.6 KiB
C
157 lines
4.6 KiB
C
/**
|
|
* \addtogroup rimermh
|
|
* @{
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2007, 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: rmh.c,v 1.1 2007/05/22 20:45:18 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* Multihop forwarding
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
#include "contiki.h"
|
|
#include "net/rime.h"
|
|
#include "net/rime/rmh.h"
|
|
|
|
struct data_hdr {
|
|
rimeaddr_t dest;
|
|
rimeaddr_t originator;
|
|
u8_t hops;
|
|
u8_t max_rexmits;
|
|
};
|
|
|
|
#define DEBUG 0
|
|
#if DEBUG
|
|
#include <stdio.h>
|
|
#define PRINTF(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define PRINTF(...)
|
|
#endif
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
received(struct ruc_conn *uc, rimeaddr_t *from, u8_t seqno)
|
|
{
|
|
struct rmh_conn *c = (struct rmh_conn *)uc;
|
|
struct data_hdr *msg = rimebuf_dataptr();
|
|
rimeaddr_t *nexthop;
|
|
|
|
PRINTF("data_packet_received from %d towards %d len %d\n", from->u16[0],
|
|
msg->dest.u16[0],
|
|
rimebuf_datalen());
|
|
|
|
if(rimeaddr_cmp(&msg->dest, &rimeaddr_node_addr)) {
|
|
PRINTF("for us!\n");
|
|
rimebuf_hdrreduce(sizeof(struct data_hdr));
|
|
if(c->cb->recv) {
|
|
c->cb->recv(c, &msg->originator);
|
|
}
|
|
} else {
|
|
nexthop = NULL;
|
|
if(c->cb->forward) {
|
|
nexthop = c->cb->forward(c, &msg->originator,
|
|
&msg->dest, from, msg->hops);
|
|
}
|
|
if(nexthop) {
|
|
PRINTF("forwarding to %d\n", rt->nexthop.u16[0]);
|
|
msg->hops++;
|
|
ruc_send(&c->c, nexthop, c->num_rexmit);
|
|
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
sent(struct ruc_conn *c)
|
|
{
|
|
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
timedout(struct ruc_conn *c)
|
|
{
|
|
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static const struct ruc_callbacks data_callbacks = { received ,
|
|
sent,
|
|
timedout};
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rmh_open(struct rmh_conn *c, u16_t channel,
|
|
const struct rmh_callbacks *callbacks)
|
|
{
|
|
ruc_open(&c->c, channel, &data_callbacks);
|
|
c->cb = callbacks;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rmh_close(struct rmh_conn *c)
|
|
{
|
|
ruc_close(&c->c);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
rmh_send(struct rmh_conn *c, rimeaddr_t *to, u8_t num_rexmit, u8_t max_hops)
|
|
{
|
|
rimeaddr_t *nexthop;
|
|
struct data_hdr *hdr;
|
|
|
|
c->num_rexmit = num_rexmit;
|
|
nexthop = c->cb->forward(c, &rimeaddr_node_addr, to, NULL, 0);
|
|
if(nexthop == NULL) {
|
|
PRINTF("rmh_send: no route\n");
|
|
return 0;
|
|
} else {
|
|
PRINTF("rmh_send: sending data\n");
|
|
|
|
|
|
if(rimebuf_hdralloc(sizeof(struct data_hdr))) {
|
|
hdr = rimebuf_hdrptr();
|
|
rimeaddr_copy(&hdr->dest, to);
|
|
rimeaddr_copy(&hdr->originator, &rimeaddr_node_addr);
|
|
hdr->hops = 0;
|
|
hdr->max_rexmits = num_rexmit;
|
|
ruc_send(&c->c, nexthop, num_rexmit);
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @} */
|