contiki/core/net/mac/nullrdc-framer.c

/*
 * Copyright (c) 2010, 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: nullrdc-framer.c,v 1.1 2010/03/01 13:30:23 nifi Exp $
 */

/**
 * \file
 *         A null RDC implementation that uses framer for headers.
 * \author
 *         Adam Dunkels <adam@sics.se>
 *         Niclas Finne <nfi@sics.se>
 */

#include "net/mac/nullrdc-framer.h"
#include "net/rime/packetbuf.h"
#include "net/netstack.h"

#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif

/*---------------------------------------------------------------------------*/
static void
send_packet(mac_callback_t sent, void *ptr)
{
  int ret;
  packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
  if(NETSTACK_FRAMER.create() == 0) {
    /* Failed to allocate space for headers */
    PRINTF("nullrdc_framer: send failed, too large header\n");
    ret = MAC_TX_ERR_FATAL;
  } else if(NETSTACK_RADIO.send(packetbuf_hdrptr(), packetbuf_totlen())
            == RADIO_TX_OK) {
    ret = MAC_TX_OK;
  } else {
    ret = MAC_TX_ERR;
  }
  mac_call_sent_callback(sent, ptr, ret, 1);
}
/*---------------------------------------------------------------------------*/
static void
packet_input(void)
{
  if(NETSTACK_FRAMER.parse() == 0) {
    PRINTF("nullrdc_framer: failed to parse %u\n", packetbuf_datalen());
  } else {
    NETSTACK_MAC.input();
  }
}
/*---------------------------------------------------------------------------*/
static int
on(void)
{
  return NETSTACK_RADIO.on();
}
/*---------------------------------------------------------------------------*/
static int
off(int keep_radio_on)
{
  if(keep_radio_on) {
    return NETSTACK_RADIO.on();
  } else {
    return NETSTACK_RADIO.off();
  }
}
/*---------------------------------------------------------------------------*/
static unsigned short
channel_check_interval(void)
{
  return 0;
}
/*---------------------------------------------------------------------------*/
static void
init(void)
{
  on();
}
/*---------------------------------------------------------------------------*/
const struct rdc_driver nullrdc_framer_driver = {
  "nullrdc-framer",
  init,
  send_packet,
  packet_input,
  on,
  off,
  channel_check_interval,
};
/*---------------------------------------------------------------------------*/