Gabriel: Controle de Estimação de Estados entre dois nodos com configuração repassada pelo controlador

#include "contiki.h"
#include "stddef.h" /* For offsetof */
#include "stdio.h"
#include "contiki-conf.h"
#include "cc2420.h"
#include "cc2420_const.h"
#include "lib/random.h"
#include "sys/ctimer.h"
#include "sys/etimer.h"
#include "net/ip/uip.h"
#include "net/ipv6/uip-ds6.h"
#include "simple-udp.h"
#include <string.h>
#include <core/net/packetbuf.h>

#define UDP_PORT 1234

#define SEND_INTERVAL		(20 * CLOCK_SECOND)
#define SEND_TIME		(random_rand() % (SEND_INTERVAL))

static struct simple_udp_connection broadcast_connection;

PROCESS (coleta_process, "Coletador");
AUTOSTART_PROCESSES (&coleta_process);

static void
receiver(struct simple_udp_connection *c,
         const uip_ipaddr_t *sender_addr,
         uint16_t sender_port,
         const uip_ipaddr_t *receiver_addr,
         uint16_t receiver_port,
         const uint8_t *data,
         uint16_t datalen)
{
  int rssi  = packetbuf_attr(PACKETBUF_ATTR_RSSI);
  int lqi = packetbuf_attr(PACKETBUF_ATTR_LINK_QUALITY);
  printf("Dados recebidos da porta %d pela porta %d com tamanho %d, rssi = %d e lqi = %d \n",
         receiver_port, sender_port, datalen, rssi, lqi);
}

PROCESS_THREAD(coleta_process, ev, data)
{
  static struct etimer periodic_timer;
  static struct etimer send_timer;
  uip_ipaddr_t addr;

  PROCESS_BEGIN();

  simple_udp_register(&broadcast_connection, UDP_PORT,
                      NULL, UDP_PORT,
                      receiver);

  etimer_set(&periodic_timer, SEND_INTERVAL);
  while(1)
  {
    PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
    etimer_reset(&periodic_timer);
    etimer_set(&send_timer, SEND_TIME);

    PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&send_timer));
    printf("Enviando Transmisao\n");
    uip_create_linklocal_allnodes_mcast(&addr);
    simple_udp_sendto(&broadcast_connection, "Test", 4, &addr);
  }

  PROCESS_END();
}