85b494c16b
Followed by doxyen file and group tags. This patch is only a first attempt to make provide a clean structure, many more files require rework, too.
153 lines
4.4 KiB
C
153 lines
4.4 KiB
C
/*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* Polite Anonymous best effort local area BroadCast (polite)
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
/**
|
|
* \addtogroup rimepolite
|
|
* @{
|
|
*/
|
|
|
|
#include "net/rime/rime.h"
|
|
#include "net/rime/polite.h"
|
|
#include "lib/random.h"
|
|
|
|
#include <string.h>
|
|
|
|
#ifndef MAX
|
|
#define MAX(a,b) ((a) > (b)? (a) : (b))
|
|
#endif /* MAX */
|
|
|
|
#ifndef MIN
|
|
#define MIN(a, b) ((a) < (b)? (a) : (b))
|
|
#endif /* MIN */
|
|
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
recv(struct abc_conn *abc)
|
|
{
|
|
struct polite_conn *c = (struct polite_conn *)abc;
|
|
if(c->q != NULL &&
|
|
packetbuf_datalen() == queuebuf_datalen(c->q) &&
|
|
memcmp(packetbuf_dataptr(), queuebuf_dataptr(c->q),
|
|
MIN(c->hdrsize, packetbuf_datalen())) == 0) {
|
|
/* We received a copy of our own packet, so we do not send out
|
|
packet. */
|
|
queuebuf_free(c->q);
|
|
c->q = NULL;
|
|
ctimer_stop(&c->t);
|
|
if(c->cb->dropped) {
|
|
c->cb->dropped(c);
|
|
}
|
|
}
|
|
if(c->cb->recv) {
|
|
c->cb->recv(c);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
sent(struct abc_conn *c, int status, int num_tx)
|
|
{
|
|
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
send(void *ptr)
|
|
{
|
|
struct polite_conn *c = ptr;
|
|
|
|
if(c->q != NULL) {
|
|
queuebuf_to_packetbuf(c->q);
|
|
queuebuf_free(c->q);
|
|
c->q = NULL;
|
|
abc_send(&c->c);
|
|
if(c->cb->sent) {
|
|
c->cb->sent(c);
|
|
}
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static const struct abc_callbacks abc = { recv, sent };
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
polite_open(struct polite_conn *c, uint16_t channel,
|
|
const struct polite_callbacks *cb)
|
|
{
|
|
abc_open(&c->c, channel, &abc);
|
|
c->cb = cb;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
polite_close(struct polite_conn *c)
|
|
{
|
|
abc_close(&c->c);
|
|
ctimer_stop(&c->t);
|
|
if(c->q != NULL) {
|
|
queuebuf_free(c->q);
|
|
c->q = NULL;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
polite_send(struct polite_conn *c, clock_time_t interval, uint8_t hdrsize)
|
|
{
|
|
if(c->q != NULL) {
|
|
/* If we are already about to send a packet, we cancel the old one. */
|
|
queuebuf_free(c->q);
|
|
}
|
|
c->hdrsize = hdrsize;
|
|
c->q = queuebuf_new_from_packetbuf();
|
|
if(c->q != NULL) {
|
|
ctimer_set(&c->t, interval / 2 + (random_rand() % (interval / 2)), send, c);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
polite_cancel(struct polite_conn *c)
|
|
{
|
|
ctimer_stop(&c->t);
|
|
if(c->q != NULL) {
|
|
queuebuf_free(c->q);
|
|
c->q = NULL;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @} */
|