68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
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#include "contiki.h"
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#include "lib/random.h"
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#include "sys/ctimer.h"
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#include "sys/etimer.h"
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#include "net/uip.h"
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#include "net/uip-ds6.h"
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#include "simple-udp.h"
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#include <stdio.h>
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#include <string.h>
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#define UDP_PORT 1234
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#define SEND_INTERVAL (10 * CLOCK_SECOND)
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#define SEND_TIME (random_rand() % (SEND_INTERVAL))
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static struct simple_udp_connection broadcast_connection;
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/*---------------------------------------------------------------------------*/
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PROCESS(broadcast_example_process, "UDP broadcast example process");
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AUTOSTART_PROCESSES(&broadcast_example_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(broadcast_example_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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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, SEND_INTERVAL);
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while(1) {
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PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_TIMER);
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if(data == &periodic_timer) {
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etimer_reset(&periodic_timer);
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etimer_set(&send_timer, SEND_TIME);
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}
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if(data == &send_timer) {
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uip_ipaddr_t addr;
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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, "hej\n", 4, &addr);
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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