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

157 lines
5.1 KiB
C

/**
* \addtogroup rime
* @{
*/
/*
* 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: rime.c,v 1.24 2010/02/03 20:38:33 adamdunkels Exp $
*/
/**
* \file
* Rime initialization and common code
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "net/rime.h"
#include "net/rime/chameleon.h"
#include "net/rime/neighbor.h"
#include "net/rime/route.h"
#include "net/rime/announcement.h"
#include "net/rime/polite-announcement.h"
#include "net/mac/mac.h"
#include "lib/list.h"
const struct mac_driver *rime_mac;
#ifdef RIME_CONF_POLITE_ANNOUNCEMENT_CHANNEL
#define POLITE_ANNOUNCEMENT_CHANNEL RIME_CONF_POLITE_ANNOUNCEMENT_CHANNEL
#else /* RIME_CONF_POLITE_ANNOUNCEMENT_CHANNEL */
#define POLITE_ANNOUNCEMENT_CHANNEL 1
#endif /* RIME_CONF_POLITE_ANNOUNCEMENT_CHANNEL */
#ifdef RIME_CONF_POLITE_ANNOUNCEMENT_START_TIME
#define POLITE_ANNOUNCEMENT_START_TIME RIME_CONF_POLITE_ANNOUNCEMENT_START_TIME
#else /* RIME_CONF_POLITE_ANNOUNCEMENT_START_TIME */
#define POLITE_ANNOUNCEMENT_START_TIME CLOCK_SECOND * 8
#endif /* RIME_CONF_POLITE_ANNOUNCEMENT_START_TIME */
#ifdef RIME_CONF_POLITE_ANNOUNCEMENT_MAX_TIME
#define POLITE_ANNOUNCEMENT_MAX_TIME RIME_CONF_POLITE_ANNOUNCEMENT_MAX_TIME
#else /* RIME_CONF_POLITE_ANNOUNCEMENT_MAX_TIME */
#define POLITE_ANNOUNCEMENT_MAX_TIME CLOCK_SECOND * 64
#endif /* RIME_CONF_POLITE_ANNOUNCEMENT_MAX_TIME */
LIST(sniffers);
/*---------------------------------------------------------------------------*/
void
rime_sniffer_add(struct rime_sniffer *s)
{
list_add(sniffers, s);
}
/*---------------------------------------------------------------------------*/
void
rime_sniffer_remove(struct rime_sniffer *s)
{
list_remove(sniffers, s);
}
/*---------------------------------------------------------------------------*/
static void
input(const struct mac_driver *r)
{
int len;
struct rime_sniffer *s;
len = rime_mac->read();
if(len > 0) {
for(s = list_head(sniffers); s != NULL; s = s->next) {
if(s->input_callback != NULL) {
s->input_callback();
}
}
RIMESTATS_ADD(rx);
chameleon_input();
}
}
/*---------------------------------------------------------------------------*/
void
rime_init(const struct mac_driver *m)
{
queuebuf_init();
packetbuf_clear();
announcement_init();
rime_mac = m;
rime_mac->set_receive_function(input);
chameleon_init(&chameleon_bitopt);
#if ! RIME_CONF_NO_POLITE_ANNOUCEMENTS
/* XXX This is initializes the transmission of announcements but it
* is not currently certain where this initialization is supposed to
* be. Also, the times are arbitrarily set for now. They should
* either be configurable, or derived from some MAC layer property
* (duty cycle, sleep time, or something similar). But this is OK
* for now, and should at least get us started with experimenting
* with announcements.
*/
polite_announcement_init(POLITE_ANNOUNCEMENT_CHANNEL,
POLITE_ANNOUNCEMENT_START_TIME,
POLITE_ANNOUNCEMENT_MAX_TIME);
#endif /* ! RIME_CONF_NO_POLITE_ANNOUCEMENTS */
}
/*---------------------------------------------------------------------------*/
int
rime_output(void)
{
struct rime_sniffer *s;
RIMESTATS_ADD(tx);
packetbuf_compact();
if(rime_mac) {
if(rime_mac->send() == MAC_TX_OK) {
/* Call sniffers, but only if the packet was sent. */
for(s = list_head(sniffers); s != NULL; s = s->next) {
if(s->output_callback != NULL) {
s->output_callback();
}
}
return RIME_OK;
}
}
return RIME_ERR;
}
/*---------------------------------------------------------------------------*/
/** @} */