83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
#include "contiki.h"
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#include "net/routing/routing.h"
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#include "random.h"
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#include "net/netstack.h"
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#include "net/ipv6/simple-udp.h"
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#include "sys/log.h"
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#define LOG_MODULE "App"
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#define LOG_LEVEL LOG_LEVEL_INFO
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#define WITH_SERVER_REPLY 1
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#define UDP_CLIENT_PORT 8765
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#define UDP_SERVER_PORT 5678
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#define SEND_INTERVAL (60 * CLOCK_SECOND)
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static struct simple_udp_connection udp_conn;
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/*---------------------------------------------------------------------------*/
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PROCESS(udp_client_process, "UDP client");
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AUTOSTART_PROCESSES(&udp_client_process);
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/*---------------------------------------------------------------------------*/
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static void
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udp_rx_callback(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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unsigned count = *(unsigned *)data;
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/* If tagging of traffic class is enabled tc will print number of
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transmission - otherwise it will be 0 */
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LOG_INFO("Received response %u (Max MAC Tx: %d) from ", count,
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uipbuf_get_attr(UIPBUF_ATTR_MAX_MAC_TRANSMISSIONS));
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LOG_INFO_6ADDR(sender_addr);
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LOG_INFO_("\n");
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(udp_client_process, ev, data)
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{
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static struct etimer periodic_timer;
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static unsigned count;
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uip_ipaddr_t dest_ipaddr;
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PROCESS_BEGIN();
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/* Initialize UDP connection */
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simple_udp_register(&udp_conn, UDP_CLIENT_PORT, NULL,
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UDP_SERVER_PORT, udp_rx_callback);
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etimer_set(&periodic_timer, random_rand() % SEND_INTERVAL);
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while(1) {
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
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if(NETSTACK_ROUTING.node_is_reachable() && NETSTACK_ROUTING.get_root_ipaddr(&dest_ipaddr)) {
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/* Set the number of transmissions to use for this packet -
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this can be used to create more reliable transmissions or
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less reliable than the default. Works end-to-end if
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UIP_CONF_TAG_TC_WITH_VARIABLE_RETRANSMISSIONS is set to 1.
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*/
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uipbuf_set_attr(UIPBUF_ATTR_MAX_MAC_TRANSMISSIONS, 1 + count % 5);
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/* Send to DAG root */
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LOG_INFO("Sending request %u (Max MAC Tx: %d) to ", count,
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uipbuf_get_attr(UIPBUF_ATTR_MAX_MAC_TRANSMISSIONS));
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LOG_INFO_6ADDR(&dest_ipaddr);
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LOG_INFO_("\n");
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simple_udp_sendto(&udp_conn, &count, sizeof(count), &dest_ipaddr);
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count++;
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} else {
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LOG_INFO("Not reachable yet\n");
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}
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/* Add some jitter */
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etimer_set(&periodic_timer, SEND_INTERVAL
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- CLOCK_SECOND + (random_rand() % (2 * CLOCK_SECOND)));
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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