nes-proj/core/net/rime/stunicast.c

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/**
* \addtogroup rimestunicast
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* @{
*/
/*
* 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: stunicast.c,v 1.1 2008/07/03 21:35:46 adamdunkels Exp $
*/
/**
* \file
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* Stubborn unicast
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "net/rime/stunicast.h"
#include "net/rime.h"
#include <string.h>
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#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/*---------------------------------------------------------------------------*/
static void
recv_from_uc(struct unicast_conn *uc, rimeaddr_t *from)
{
register struct stunicast_conn *c = (struct stunicast_conn *)uc;
PRINTF("%d.%d: stunicast: recv_from_uc from %d.%d\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
from->u8[0], from->u8[1]);
if(c->u->recv != NULL) {
c->u->recv(c, from);
}
}
/*---------------------------------------------------------------------------*/
static const struct unicast_callbacks stunicast = {recv_from_uc};
/*---------------------------------------------------------------------------*/
void
stunicast_open(struct stunicast_conn *c, uint16_t channel,
const struct stunicast_callbacks *u)
{
unicast_open(&c->c, channel, &stunicast);
c->u = u;
}
/*---------------------------------------------------------------------------*/
void
stunicast_close(struct stunicast_conn *c)
{
unicast_close(&c->c);
ctimer_stop(&c->t);
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if(c->buf != NULL) {
queuebuf_free(c->buf);
}
}
/*---------------------------------------------------------------------------*/
rimeaddr_t *
stunicast_receiver(struct stunicast_conn *c)
{
return &c->receiver;
}
/*---------------------------------------------------------------------------*/
static void
send(void *ptr)
{
struct stunicast_conn *c = ptr;
PRINTF("%d.%d: stunicast: resend to %d.%d\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
c->receiver.u8[0], c->receiver.u8[1]);
queuebuf_to_rimebuf(c->buf);
unicast_send(&c->c, &c->receiver);
stunicast_set_timer(c, CLOCK_SECOND);
if(c->u->sent != NULL) {
c->u->sent(c);
}
}
/*---------------------------------------------------------------------------*/
void
stunicast_set_timer(struct stunicast_conn *c, clock_time_t t)
{
ctimer_set(&c->t, t, send, c);
}
/*---------------------------------------------------------------------------*/
int
stunicast_send_stubborn(struct stunicast_conn *c, rimeaddr_t *receiver,
clock_time_t rxmittime)
{
if(c->buf != NULL) {
queuebuf_free(c->buf);
}
c->buf = queuebuf_new_from_rimebuf();
if(c->buf == NULL) {
return 0;
}
rimeaddr_copy(&c->receiver, receiver);
ctimer_set(&c->t, rxmittime, send, c);
PRINTF("%d.%d: stunicast_send_stubborn to %d.%d\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
c->receiver.u8[0],c->receiver.u8[1]);
unicast_send(&c->c, &c->receiver);
if(c->u->sent != NULL) {
c->u->sent(c);
}
return 1;
}
/*---------------------------------------------------------------------------*/
int
stunicast_send(struct stunicast_conn *c, rimeaddr_t *receiver)
{
PRINTF("%d.%d: stunicast_send to %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
receiver->u8[0], receiver->u8[1]);
return unicast_send(&c->c, receiver);
}
/*---------------------------------------------------------------------------*/
void
stunicast_cancel(struct stunicast_conn *c)
{
ctimer_stop(&c->t);
}
/*---------------------------------------------------------------------------*/
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/** @} */