sender.c

/*
 * Copyright (c) 2017, Hasso-Plattner-Institut.
 * 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 copyright holder 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 COPYRIGHT HOLDERS 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
 * COPYRIGHT HOLDER 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.
 */

#include "contiki.h"
#include "net/netstack.h"
#include "net/packetbuf.h"
#include "net/linkaddr.h"
#include "sys/etimer.h"
#include "services/akes/akes-nbr.h"
#include "services/akes/akes-trickle.h"
#include "services/akes/akes-mac.h"
#include "net/mac/wake-up-counter.h"

#include "sys/log.h"
#define LOG_MODULE "Sender"
#define LOG_LEVEL LOG_LEVEL_DBG

PROCESS(sender_process, "sender_process");
AUTOSTART_PROCESSES(&sender_process);

/*---------------------------------------------------------------------------*/
static void
on_sent(void *ptr, int status, int transmissions)
{
  static int tx_ok;
  static int tx_collision;
  static int tx_noack;
  static int tx_deferred;
  static int tx_err;
  static int tx_err_fatal;

  switch(status) {
  case MAC_TX_OK:
    tx_ok++;
    break;
  case MAC_TX_COLLISION:
    tx_collision++;
    break;
  case MAC_TX_NOACK:
    tx_noack++;
    break;
  case MAC_TX_DEFERRED:
    tx_deferred++;
    break;
  case MAC_TX_ERR:
    tx_err++;
    break;
  case MAC_TX_ERR_FATAL:
    tx_err_fatal++;
    break;
  }
  LOG_DBG("OK %i / COLLISION %i / NOACK %i / DEFERRED %i / ERR %i / ERR_FATAL %i\n",
          tx_ok,
          tx_collision,
          tx_noack,
          tx_deferred,
          tx_err,
          tx_err_fatal);
  process_poll(&sender_process);
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(sender_process, ev, data)
{
#if AKES_MAC_ENABLED
  static struct etimer periodic_timer;
#endif /* AKES_MAC_ENABLED */
  static linkaddr_t receivers_address;

  PROCESS_BEGIN();

#if AKES_MAC_ENABLED
  /* disable neighbor discovery once we have found the receiver side */
  etimer_set(&periodic_timer, CLOCK_SECOND / WAKE_UP_COUNTER_RATE);
  while(1) {
    PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
    etimer_reset(&periodic_timer);
    akes_nbr_entry_t *entry = akes_nbr_head(AKES_NBR_PERMANENT);
    if(entry) {
      akes_trickle_stop();
      linkaddr_copy(&receivers_address, akes_nbr_get_addr(entry));
      break;
    }
  }
#else /* AKES_MAC_ENABLED */
  receivers_address.u16 = 0x0001;
  if(linkaddr_cmp(&receivers_address, &linkaddr_node_addr)) {
    receivers_address.u16 = 0x0002;
  }
#endif /* AKES_MAC_ENABLED */

  /* send a maximum-length unicast frame to the receiver side */
  while(1) {
    packetbuf_clear();
    packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, &receivers_address);
    packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS, 1);
    packetbuf_set_attr(PACKETBUF_ATTR_FRAME_TYPE, FRAME802154_DATAFRAME);
    int payload_len = NETSTACK_MAC.max_payload();
    memset(packetbuf_dataptr(), 0xFF, payload_len);
    packetbuf_set_datalen(payload_len);
    NETSTACK_MAC.send(on_sent, NULL);
    PROCESS_YIELD();
  }

  PROCESS_END();
}
/*---------------------------------------------------------------------------*/