62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
|
#include "contiki.h"
|
||
|
|
#include "contiki-lib.h"
|
||
|
|
#include "contiki-net.h"
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
#define UDP_PORT 61618
|
||
|
|
|
||
|
|
#define SEND_INTERVAL (4 * CLOCK_SECOND)
|
||
|
|
|
||
|
|
static struct simple_udp_connection broadcast_connection;
|
||
|
|
|
||
|
|
#ifndef SIZE
|
||
|
|
#define SIZE 100
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*---------------------------------------------------------------------------*/
|
||
|
|
PROCESS(udp_process, "UDP broadcast process");
|
||
|
|
AUTOSTART_PROCESSES(&udp_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)
|
||
|
|
{
|
||
|
|
printf("Data received on port %d from port %d with length %d\n",
|
||
|
|
receiver_port, sender_port, datalen);
|
||
|
|
}
|
||
|
|
/*---------------------------------------------------------------------------*/
|
||
|
|
PROCESS_THREAD(udp_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, 20 * CLOCK_SECOND);
|
||
|
|
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
|
||
|
|
etimer_set(&periodic_timer, SEND_INTERVAL);
|
||
|
|
while(1) {
|
||
|
|
uint8_t buf[SIZE];
|
||
|
|
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
|
||
|
|
etimer_reset(&periodic_timer);
|
||
|
|
|
||
|
|
printf("Sending broadcast\n");
|
||
|
|
uip_create_linklocal_allnodes_mcast(&addr);
|
||
|
|
simple_udp_sendto(&broadcast_connection, buf, sizeof(buf), &addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
PROCESS_END();
|
||
|
|
}
|
||
|
|
/*---------------------------------------------------------------------------*/
|