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updated runicast example: added sender history to detect duplicate callbacks
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@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: example-runicast.c,v 1.2 2008/11/11 13:50:21 fros4943 Exp $
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* $Id: example-runicast.c,v 1.3 2009/03/03 12:28:39 fros4943 Exp $
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*/
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/**
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@ -38,39 +38,77 @@
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* Adam Dunkels <adam@sics.se>
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*/
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#include <stdio.h>
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#include "contiki.h"
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#include "net/rime.h"
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#include "dev/button-sensor.h"
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#include "lib/list.h"
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#include "lib/memb.h"
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#include "dev/button-sensor.h"
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#include "dev/leds.h"
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#include <stdio.h>
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#define MAX_RETRANSMISSIONS 4
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#define NUM_HISTORY_ENTRIES 4
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/*---------------------------------------------------------------------------*/
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PROCESS(test_runicast_process, "runicast test");
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AUTOSTART_PROCESSES(&test_runicast_process);
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/*---------------------------------------------------------------------------*/
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static uint8_t in_tx;
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/* OPTIONAL: Sender history.
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* Detects duplicate callbacks at receiving nodes.
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* Duplicates appear when ack messages are lost. */
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struct history_entry {
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struct history_entry *next;
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rimeaddr_t addr;
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uint8_t seq;
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};
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LIST(history_table);
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MEMB(history_mem, struct history_entry, NUM_HISTORY_ENTRIES);
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/*---------------------------------------------------------------------------*/
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static void
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recv_runicast(struct runicast_conn *c, rimeaddr_t *from, uint8_t seqno)
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{
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/* OPTIONAL: Sender history */
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struct history_entry *e = NULL;
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for(e = list_head(history_table); e != NULL; e = e->next) {
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if (rimeaddr_cmp(&e->addr, from)) {
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break;
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}
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}
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if (e == NULL) {
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/* Create new history entry */
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e = memb_alloc(&history_mem);
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if(e == NULL) {
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e = list_chop(history_table); /* Remove oldest at full history */
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}
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rimeaddr_copy(&e->addr, from);
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e->seq = seqno;
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list_push(history_table, e);
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} else {
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/* Detect duplicate callback */
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if (e->seq == seqno) {
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printf("runicast message received from %d.%d, seqno %d (DUPLICATE)\n",
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from->u8[0], from->u8[1], seqno);
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return;
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}
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/* Update existing history entry */
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e->seq = seqno;
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}
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printf("runicast message received from %d.%d, seqno %d\n",
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from->u8[0], from->u8[1], seqno);
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}
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static void
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sent_runicast(struct runicast_conn *c, rimeaddr_t *to, uint8_t retransmissions)
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{
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in_tx = 0;
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printf("runicast message sent to %d.%d, retransmissions %d\n",
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to->u8[0], to->u8[1], retransmissions);
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}
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static void
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timedout_runicast(struct runicast_conn *c, rimeaddr_t *to, uint8_t retransmissions)
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{
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in_tx = 0;
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printf("runicast message timed out when sending to %d.%d, retransmissions %d\n",
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to->u8[0], to->u8[1], retransmissions);
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}
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@ -86,31 +124,36 @@ PROCESS_THREAD(test_runicast_process, ev, data)
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PROCESS_BEGIN();
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runicast_open(&runicast, 128, &runicast_callbacks);
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in_tx = 0;
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/* OPTIONAL: Sender history */
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list_init(history_table);
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memb_init(&history_mem);
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/* Receiver node: do nothing */
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if(rimeaddr_node_addr.u8[0] == 1 &&
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rimeaddr_node_addr.u8[1] == 0) {
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PROCESS_WAIT_EVENT_UNTIL(0);
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}
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while(1) {
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static struct etimer et;
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etimer_set(&et, 10*CLOCK_SECOND);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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if(!in_tx &&
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!(rimeaddr_node_addr.u8[0] == 1 &&
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rimeaddr_node_addr.u8[1] == 0)) {
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if(!runicast_is_transmitting(&runicast)) {
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rimeaddr_t recv;
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rimebuf_copyfrom("Hello", 5);
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recv.u8[0] = 1;
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recv.u8[1] = 0;
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/*printf("%u.%u: sending runicast to address %u.%u\n",
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printf("%u.%u: sending runicast to address %u.%u\n",
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rimeaddr_node_addr.u8[0],
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rimeaddr_node_addr.u8[1],
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recv.u8[0],
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recv.u8[1]);*/
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recv.u8[1]);
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in_tx = 1;
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runicast_send(&runicast, &recv, MAX_RETRANSMISSIONS);
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}
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}
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