/*
 * 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
 *         border-router
 * \author
 *         Niclas Finne <nfi@sics.se>
 *         Joakim Eriksson <joakime@sics.se>
 *         Nicolas Tsiftes <nvt@sics.se>
 */

#include "contiki.h"
#include "rpl.h"
#include "dev/button-sensor.h"
#include "dev/slip.h"
#include "border-router-common.h"

/*---------------------------------------------------------------------------*/
/* Log configuration */
#include "sys/log.h"
#define LOG_MODULE "BR"
#define LOG_LEVEL LOG_LEVEL_INFO

void request_prefix(void);

/*---------------------------------------------------------------------------*/
PROCESS(border_router_process, "Border router process");
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(border_router_process, ev, data)
{
  static struct etimer et;

  PROCESS_BEGIN();

/* While waiting for the prefix to be sent through the SLIP connection, the future
 * border router can join an existing DAG as a parent or child, or acquire a default
 * router that will later take precedence over the SLIP fallback interface.
 * Prevent that by turning the radio off until we are initialized as a DAG root.
 */
  prefix_set = 0;
  NETSTACK_MAC.off();

  PROCESS_PAUSE();

  SENSORS_ACTIVATE(button_sensor);

  LOG_INFO("RPL-Border router started\n");

  /* Request prefix until it has been received */
  while(!prefix_set) {
    etimer_set(&et, CLOCK_SECOND);
    request_prefix();
    PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
    LOG_INFO("Waiting for prefix\n");
  }

  NETSTACK_MAC.on();

  print_local_addresses();

  while(1) {
    PROCESS_YIELD();
    if(ev == sensors_event && data == &button_sensor) {
      LOG_INFO("Initiating global repair\n");
#if UIP_CONF_IPV6_RPL_LITE
      rpl_global_repair();
#else
      rpl_repair_root(RPL_DEFAULT_INSTANCE);
#endif
    }
  }

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