62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
#include "contiki.h"
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#include "contiki-lib.h"
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#include "contiki-net.h"
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#include <stdio.h>
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#define UDP_PORT 61618
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#define SEND_INTERVAL (4 * CLOCK_SECOND)
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static struct simple_udp_connection broadcast_connection;
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#ifndef SIZE
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#define SIZE 100
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#endif
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/*---------------------------------------------------------------------------*/
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PROCESS(udp_process, "UDP broadcast process");
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AUTOSTART_PROCESSES(&udp_process);
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/*---------------------------------------------------------------------------*/
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static void
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receiver(struct simple_udp_connection *c,
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const uip_ipaddr_t *sender_addr,
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uint16_t sender_port,
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const uip_ipaddr_t *receiver_addr,
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uint16_t receiver_port,
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const uint8_t *data,
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uint16_t datalen)
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{
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printf("Data received on port %d from port %d with length %d\n",
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receiver_port, sender_port, datalen);
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(udp_process, ev, data)
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{
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static struct etimer periodic_timer;
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static struct etimer send_timer;
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uip_ipaddr_t addr;
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PROCESS_BEGIN();
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simple_udp_register(&broadcast_connection, UDP_PORT,
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NULL, UDP_PORT,
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receiver);
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etimer_set(&periodic_timer, 20 * CLOCK_SECOND);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
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etimer_set(&periodic_timer, SEND_INTERVAL);
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while(1) {
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uint8_t buf[SIZE];
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
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etimer_reset(&periodic_timer);
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printf("Sending broadcast\n");
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uip_create_linklocal_allnodes_mcast(&addr);
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simple_udp_sendto(&broadcast_connection, buf, sizeof(buf), &addr);
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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