/*
 * 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.
 *
 */

#include "contiki.h"
#include "contiki-lib.h"
#include "contiki-net.h"

#include <string.h>

#define DEBUG 1
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
#define PRINTLLADDR(lladdr) PRINTF(" %02x:%02x:%02x:%02x:%02x:%02x ",(lladdr)->addr[0], (lladdr)->addr[1], (lladdr)->addr[2], (lladdr)->addr[3],(lladdr)->addr[4], (lladdr)->addr[5])
#else
#define PRINTF(...)
#define PRINT6ADDR(addr)
#define PRINTLLADDR(addr)
#endif

#define UDP_NB 5
#define UDP_MAX_DATA_LEN 32

static struct etimer udp_periodic_timer;

static struct uip_udp_conn *udpconn;
static u8_t count = 0;

PROCESS(udp_process_sender, "UPD test sender");
AUTOSTART_PROCESSES(&udp_process_sender);

/*---------------------------------------------------------------------------*/
static u8_t
udphandler(process_event_t ev, process_data_t data)
{
  if (etimer_expired(&udp_periodic_timer)) {
    printf("Event timer expired\n");
    count=0;
  }

  if (ev == tcpip_event) {
    if(uip_newdata()) {
      ((char *)uip_appdata)[uip_datalen()] = 0;
      printf("Sender received: '%s'\n", uip_appdata);
    }
  }

  if(count < UDP_NB){
    count++;

    printf("Sender sending to: ");
    PRINT6ADDR(&udpconn->ripaddr);
    printf("\n");
    uip_udp_packet_send(udpconn, "Sender says Hi!", strlen("Sender says Hi!"));
  }

  etimer_restart(&udp_periodic_timer);
  return 0;
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(udp_process_sender, ev, data)
{
  uip_ipaddr_t ipaddr;

  PROCESS_BEGIN();
  PRINTF("Process test UDP sender started\n");

#ifdef UDP_ADDR_A
  uip_ip6addr(&ipaddr,
      UDP_ADDR_A,UDP_ADDR_B,UDP_ADDR_C,UDP_ADDR_D,
      UDP_ADDR_E,UDP_ADDR_F,UDP_ADDR_G,UDP_ADDR_H);
#else /* UDP_ADDR_A */
  uip_ip6addr(&ipaddr,0xfe80,0,0,0,0x6466,0x6666,0x6666,0x6666);
#endif /* UDP_ADDR_A */

  /* new connection with remote host */
  udpconn = udp_new(&ipaddr, HTONS(0xF0B0), NULL);
  udp_bind(udpconn, HTONS(0xF0B0+1));

  PRINTF("Created connection with remote peer ");
  PRINT6ADDR(&udpconn->ripaddr);
  PRINTF("local/remote port %u/%u\n", HTONS(udpconn->lport),HTONS(udpconn->rport));

  etimer_set(&udp_periodic_timer, 15*CLOCK_SECOND);

  while(1) {
    PROCESS_YIELD();
    udphandler(ev, data);
  }

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