Significant rework of the Contiki data collection protocol:
* the new version makes use of MAC-layer feedback so that bad paths can be identified quicker and then avoided. * the new code uses transport layer ACKs that contain feedback from the collect protocol: when a packet cannot be forwarded due to lack of resources, the ACK contains a flag that indicates that the packet could not be forwarded. ACKs also contain the routing metric of the sender, which improves agility in face of rapid path changes. * loop detection and management has been improved: with higher path metric agility, the system is more prone to short-lived routing loops. Instead of dropping looping packets, the new version adjusts the routing metric for the routes that exhibit loops so that the risk for future loops is reduced. * make use of packet attributes to inform the MAC layer of how many times packets should be retransmitted.
This commit is contained in:
adamdunkels
parent
b6b4941871
commit
7165a3866f
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@ -1,6 +1,3 @@
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/* XXX: send explicit congestion notification if already forwarding
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packet. */
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/**
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* \addtogroup rimecollect
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* @{
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@ -36,7 +33,7 @@
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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: collect.c,v 1.33 2010/02/23 18:35:23 adamdunkels Exp $
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* $Id: collect.c,v 1.34 2010/02/28 09:18:01 adamdunkels Exp $
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*/
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/**
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@ -56,9 +53,7 @@
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#include "dev/radio-sensor.h"
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#if CONTIKI_TARGET_NETSIM
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#include "ether.h"
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#endif
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#include "lib/random.h"
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#include <string.h>
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#include <stdio.h>
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@ -78,12 +73,21 @@ struct recent_packet {
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uint8_t seqno;
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};
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struct ack_msg {
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uint8_t flags, dummy;
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uint16_t rtmetric;
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};
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#define ACK_FLAGS_CONGESTED 0x80
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#define ACK_FLAGS_DROPPED 0x40
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#define ACK_FLAGS_LIFETIME_EXCEEDED 0x20
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static struct recent_packet recent_packets[NUM_RECENT_PACKETS];
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static uint8_t recent_packet_ptr;
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#define FORWARD_PACKET_LIFETIME (CLOCK_SECOND * 16)
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#define MAX_FORWARDING_QUEUE 6
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PACKETQUEUE(forwarding_queue, MAX_FORWARDING_QUEUE);
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#define MAX_SENDING_QUEUE 6
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PACKETQUEUE(sending_queue, MAX_SENDING_QUEUE);
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#define SINK 0
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#define RTMETRIC_MAX COLLECT_MAX_DEPTH
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@ -104,64 +108,16 @@ PACKETQUEUE(forwarding_queue, MAX_FORWARDING_QUEUE);
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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static void
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send_queued_packet(void)
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{
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struct queuebuf *q;
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struct neighbor *n;
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struct packetqueue_item *i;
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struct collect_conn *c;
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i = packetqueue_first(&forwarding_queue);
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if(i == NULL) {
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PRINTF("%d.%d: nothing on queue\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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/* No packet on the queue, so there is nothing for us to send. */
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return;
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}
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c = packetqueue_ptr(i);
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if(c == NULL) {
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/* c should not be NULL, but we check it just to be sure. */
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PRINTF("%d.%d: queue, c == NULL!\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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return;
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}
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#define REXMIT_TIME CLOCK_SECOND * 2
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if(c->forwarding) {
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/* If we are currently forwarding a packet, we wait until the
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packet is forwarded and try again then. */
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PRINTF("%d.%d: queue, c is forwarding\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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return;
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}
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q = packetqueue_queuebuf(i);
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if(q != NULL) {
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PRINTF("%d.%d: queue, q is on queue\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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queuebuf_to_packetbuf(q);
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n = neighbor_best();
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/* Don't send to the neighbor if it is the same neighbor that sent
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us the packet. */
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if(n != NULL && !rimeaddr_cmp(&n->addr, packetbuf_addr(PACKETBUF_ADDR_SENDER))) {
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#if CONTIKI_TARGET_NETSIM
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ether_set_line(n->addr.u8[0], n->addr.u8[1]);
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#include "ether.h"
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#endif /* CONTIKI_TARGET_NETSIM */
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PRINTF("%d.%d: sending packet to %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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n->addr.u8[0], n->addr.u8[1]);
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c->forwarding = 1;
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runicast_send(&c->runicast_conn, &n->addr, packetbuf_attr(PACKETBUF_ATTR_MAX_REXMIT));
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} else {
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PRINTF("%d.%d: did not find any neighbor to forward to\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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}
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}
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}
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static void send_queued_packet(void);
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static void retransmit_callback(void *ptr);
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/*---------------------------------------------------------------------------*/
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static void
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update_rtmetric(struct collect_conn *tc)
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@ -191,9 +147,8 @@ update_rtmetric(struct collect_conn *tc)
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neighbor_discovery_set_val(&tc->neighbor_discovery_conn, tc->rtmetric);
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#endif /* COLLECT_ANNOUNCEMENTS */
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} else {
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/* We set our rtmetric to the rtmetric of our best neighbor plus
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the expected transmissions to reach that neighbor. */
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the expected transmissions to reach that neighbor. */
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if(n->rtmetric + neighbor_etx(n) != tc->rtmetric) {
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uint16_t old_rtmetric = tc->rtmetric;
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@ -201,8 +156,6 @@ update_rtmetric(struct collect_conn *tc)
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#if ! COLLECT_ANNOUNCEMENTS
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/* neighbor_discovery_set_val(&tc->neighbor_discovery_conn, tc->rtmetric);*/
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/* If we get a significantly better rtmetric than we had
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before, we call neighbor_discovery_start to start a new
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period. */
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@ -234,7 +187,7 @@ update_rtmetric(struct collect_conn *tc)
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if(tc->rtmetric == RTMETRIC_MAX) {
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strcpy(buf, " ");
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} else {
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sprintf(buf, "%.1f", (float)tc->rtmetric / NEIGHBOR_ETX_SCALE);
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sPRINTF(buf, "%.1f", (float)tc->rtmetric / NEIGHBOR_ETX_SCALE);
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}
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ether_set_text(buf);
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}
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@ -242,134 +195,367 @@ update_rtmetric(struct collect_conn *tc)
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}
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/*---------------------------------------------------------------------------*/
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static void
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node_packet_received(struct runicast_conn *c, const rimeaddr_t *from,
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uint8_t seqno)
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send_queued_packet(void)
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{
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struct queuebuf *q;
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struct neighbor *n;
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struct packetqueue_item *i;
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struct collect_conn *c;
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PRINTF("%d.%d: send_queued_packet queue len %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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packetqueue_len(&sending_queue));
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i = packetqueue_first(&sending_queue);
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if(i == NULL) {
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PRINTF("%d.%d: nothing on queue\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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/* No packet on the queue, so there is nothing for us to send. */
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return;
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}
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c = packetqueue_ptr(i);
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if(c == NULL) {
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/* c should not be NULL, but we check it just to be sure. */
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PRINTF("%d.%d: queue, c == NULL!\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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return;
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}
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if(c->sending) {
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/* If we are currently sending a packet, we wait until the
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packet is forwarded and try again then. */
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PRINTF("%d.%d: queue, c is sending\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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return;
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}
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q = packetqueue_queuebuf(i);
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if(q != NULL) {
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PRINTF("%d.%d: queue, q is on queue\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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queuebuf_to_packetbuf(q);
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n = neighbor_best();
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while(n != NULL && rimeaddr_cmp(&n->addr, packetbuf_addr(PACKETBUF_ADDR_SENDER))) {
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PRINTF("%d.%d: avoiding fowarding loop to %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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n->addr.u8[0], n->addr.u8[1]);
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neighbor_remove(&n->addr);
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update_rtmetric(c);
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n = neighbor_best();;
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}
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/* Don't send to the neighbor if it is the same neighbor that sent
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us the packet. */
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if(n != NULL) {
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clock_time_t time;
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uint8_t rexmit_time_scaling;
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#if CONTIKI_TARGET_NETSIM
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ether_set_line(n->addr.u8[0], n->addr.u8[1]);
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#endif /* CONTIKI_TARGET_NETSIM */
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PRINTF("%d.%d: sending packet to %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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n->addr.u8[0], n->addr.u8[1]);
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rimeaddr_copy(&c->current_receiver, &n->addr);
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c->sending = 1;
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c->transmissions = 0;
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c->max_rexmits = 8;//packetbuf_attr(PACKETBUF_ATTR_EMAX_REXMIT);
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PRINTF("max_rexmits %d\n", c->max_rexmits);
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packetbuf_set_attr(PACKETBUF_ATTR_RELIABLE, 1);
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packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_REXMIT, 2);
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packetbuf_set_attr(PACKETBUF_ATTR_PACKET_ID, c->seqno);
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unicast_send(&c->unicast_conn, &n->addr);
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rexmit_time_scaling = c->transmissions;
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if(rexmit_time_scaling > 3) {
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rexmit_time_scaling = 3;
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}
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time = REXMIT_TIME << rexmit_time_scaling;
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time = time / 2 + random_rand() % (time / 2);
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PRINTF("retransmission time %lu\n", time);
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ctimer_set(&c->retransmission_timer, time,
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retransmit_callback, c);
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} else {
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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send_next_packet(struct collect_conn *tc)
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{
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/* Cancel retransmission timer. */
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ctimer_stop(&tc->retransmission_timer);
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/* Remove the first packet on the queue, the packet that was just sent. */
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packetqueue_dequeue(&sending_queue);
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tc->seqno = (tc->seqno + 1) % (1 << COLLECT_PACKET_ID_BITS);
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tc->sending = 0;
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tc->transmissions = 0;
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/* Send the next packet in the queue, if any. */
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send_queued_packet();
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}
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/*---------------------------------------------------------------------------*/
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static void
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handle_ack(struct collect_conn *tc)
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{
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struct ack_msg *msg;
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uint16_t rtmetric;
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struct neighbor *n;
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if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_SENDER),
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&tc->current_receiver) &&
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packetbuf_attr(PACKETBUF_ATTR_PACKET_ID) == tc->seqno) {
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msg = packetbuf_dataptr();
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memcpy(&rtmetric, &msg->rtmetric, sizeof(uint16_t));
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n = neighbor_find(packetbuf_addr(PACKETBUF_ADDR_SENDER));
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if(n != NULL) {
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neighbor_update(n, rtmetric);
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update_rtmetric(tc);
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}
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PRINTF("%d.%d: ACK from %d.%d after %d transmissions, flags %02x\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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tc->current_receiver.u8[0], tc->current_receiver.u8[1],
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tc->transmissions,
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msg->flags);
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if(!(msg->flags & ACK_FLAGS_DROPPED)) {
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send_next_packet(tc);
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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send_ack(struct collect_conn *tc, const rimeaddr_t *to, int congestion, int dropped, int ttl)
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{
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struct ack_msg *ack;
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struct queuebuf *q;
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uint16_t packet_seqno;
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PRINTF("send_ack\n");
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packet_seqno = packetbuf_attr(PACKETBUF_ATTR_PACKET_ID);
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q = queuebuf_new_from_packetbuf();
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if(q != NULL) {
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packetbuf_clear();
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packetbuf_set_datalen(sizeof(struct ack_msg));
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ack = packetbuf_dataptr();
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memset(ack, 0, sizeof(struct ack_msg));
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ack->rtmetric = tc->rtmetric;
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ack->flags = (congestion? ACK_FLAGS_CONGESTED: 0) |
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(dropped? ACK_FLAGS_DROPPED: 0) |
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(ttl? ACK_FLAGS_LIFETIME_EXCEEDED: 0);
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/* XXX: send explicit congestion notification in ACK queue full; add rtmetric to ACK. */
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packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, to);
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packetbuf_set_attr(PACKETBUF_ATTR_PACKET_TYPE, PACKETBUF_ATTR_PACKET_TYPE_ACK);
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packetbuf_set_attr(PACKETBUF_ATTR_RELIABLE, 0);
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packetbuf_set_attr(PACKETBUF_ATTR_ERELIABLE, 0);
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packetbuf_set_attr(PACKETBUF_ATTR_PACKET_ID, packet_seqno);
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packetbuf_set_attr(PACKETBUF_ATTR_MAX_REXMIT, 2);
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unicast_send(&tc->unicast_conn, to);
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PRINTF("%d.%d: collect: Sending ACK to %d.%d for %d\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
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to->u8[0],
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to->u8[1],
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packet_seqno);
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RIMESTATS_ADD(acktx);
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queuebuf_to_packetbuf(q);
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queuebuf_free(q);
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} else {
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PRINTF("%d.%d: collect: could not send ACK to %d.%d for %d: no queued buffers\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
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to->u8[0], to->u8[1],
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packet_seqno);
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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node_packet_received(struct unicast_conn *c, const rimeaddr_t *from)
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{
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struct collect_conn *tc = (struct collect_conn *)
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((char *)c - offsetof(struct collect_conn, runicast_conn));
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((char *)c - offsetof(struct collect_conn, unicast_conn));
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int i;
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struct neighbor *n;
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/* To protect against forwarding duplicate packets, we keep a list
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/* To protect against sending duplicate packets, we keep a list
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of recently forwarded packet seqnos. If the seqno of the current
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packet exists in the list, we drop the packet and increase the
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ETX of the neighbor we sent it to in the first place. */
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if(packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) ==
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PACKETBUF_ATTR_PACKET_TYPE_DATA) {
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rimeaddr_t ack_to;
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uint8_t packet_seqno;
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for(i = 0; i < NUM_RECENT_PACKETS; i++) {
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if(recent_packets[i].seqno == packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID) &&
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rimeaddr_cmp(&recent_packets[i].originator,
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packetbuf_addr(PACKETBUF_ADDR_ESENDER))) {
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PRINTF("%d.%d: dropping duplicate packet from %d.%d with seqno %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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recent_packets[i].originator.u8[0], recent_packets[i].originator.u8[1],
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packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID));
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n = neighbor_find(&recent_packets[i].sent_to);
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if(n != NULL) {
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neighbor_update_etx(n, neighbor_etx(n) + NEIGHBOR_ETX_SCALE * 4);
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}
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/* Drop the packet. */
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rimeaddr_copy(&ack_to, packetbuf_addr(PACKETBUF_ADDR_SENDER));
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packet_seqno = packetbuf_attr(PACKETBUF_ATTR_PACKET_ID);
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if(rimeaddr_cmp(&tc->last_received_addr, packetbuf_addr(PACKETBUF_ADDR_SENDER)) &&
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tc->last_received_seqno == packetbuf_attr(PACKETBUF_ATTR_PACKET_ID)) {
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/* This is a duplicate of the packet we last received, so we just send an ACK. */
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send_ack(tc, &ack_to, 0, 0, 0);
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return;
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}
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}
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recent_packets[recent_packet_ptr].seqno = packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID);
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rimeaddr_copy(&recent_packets[recent_packet_ptr].originator,
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packetbuf_addr(PACKETBUF_ADDR_ESENDER));
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n = neighbor_best();
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rimeaddr_copy(&recent_packets[recent_packet_ptr].sent_to,
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&n->addr);
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rimeaddr_copy(&tc->last_received_addr, packetbuf_addr(PACKETBUF_ADDR_SENDER));
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tc->last_received_seqno = packetbuf_attr(PACKETBUF_ATTR_PACKET_ID);
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recent_packet_ptr = (recent_packet_ptr + 1) % NUM_RECENT_PACKETS;
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if(tc->rtmetric == SINK) {
|
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/* If we are the sink, we call the receive function. */
|
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PRINTF("%d.%d: sink received packet from %d.%d via %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
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packetbuf_addr(PACKETBUF_ADDR_ESENDER)->u8[0],
|
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packetbuf_addr(PACKETBUF_ADDR_ESENDER)->u8[1],
|
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from->u8[0], from->u8[1]);
|
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|
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if(tc->cb->recv != NULL) {
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tc->cb->recv(packetbuf_addr(PACKETBUF_ADDR_ESENDER),
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packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID),
|
||||
packetbuf_attr(PACKETBUF_ATTR_HOPS));
|
||||
for(i = 0; i < NUM_RECENT_PACKETS; i++) {
|
||||
if(recent_packets[i].seqno == packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID) &&
|
||||
rimeaddr_cmp(&recent_packets[i].originator,
|
||||
packetbuf_addr(PACKETBUF_ADDR_ESENDER))) {
|
||||
PRINTF("%d.%d: found duplicate packet from %d.%d with seqno %d, via %d.%d\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
||||
recent_packets[i].originator.u8[0], recent_packets[i].originator.u8[1],
|
||||
packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID),
|
||||
packetbuf_addr(PACKETBUF_ADDR_SENDER)->u8[0],
|
||||
packetbuf_addr(PACKETBUF_ADDR_SENDER)->u8[1]);
|
||||
n = neighbor_find(&recent_packets[i].sent_to);
|
||||
if(n != NULL) {
|
||||
neighbor_update_etx(n, neighbor_etx(n) / NEIGHBOR_ETX_SCALE + 4);
|
||||
update_rtmetric(tc);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
return;
|
||||
} else if(packetbuf_attr(PACKETBUF_ATTR_TTL) > 1 &&
|
||||
tc->rtmetric != RTMETRIC_MAX) {
|
||||
recent_packets[recent_packet_ptr].seqno = packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID);
|
||||
rimeaddr_copy(&recent_packets[recent_packet_ptr].originator,
|
||||
packetbuf_addr(PACKETBUF_ADDR_ESENDER));
|
||||
/* n = neighbor_best();*/
|
||||
|
||||
/* If we are not the sink, we forward the packet to the best
|
||||
neighbor. */
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_HOPS, packetbuf_attr(PACKETBUF_ATTR_HOPS) + 1);
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_TTL, packetbuf_attr(PACKETBUF_ATTR_TTL) - 1);
|
||||
|
||||
|
||||
PRINTF("%d.%d: packet received from %d.%d via %d.%d, forwarding %d\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
||||
packetbuf_addr(PACKETBUF_ADDR_ESENDER)->u8[0],
|
||||
packetbuf_addr(PACKETBUF_ADDR_ESENDER)->u8[1],
|
||||
from->u8[0], from->u8[1], tc->forwarding);
|
||||
|
||||
if(packetqueue_enqueue_packetbuf(&forwarding_queue, FORWARD_PACKET_LIFETIME,
|
||||
tc)) {
|
||||
send_queued_packet();
|
||||
if(tc->rtmetric != SINK) {
|
||||
n = neighbor_best();
|
||||
rimeaddr_copy(&recent_packets[recent_packet_ptr].sent_to,
|
||||
&n->addr);
|
||||
} else {
|
||||
PRINTF("%d.%d: packet dropped: no queue buffer available\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
|
||||
rimeaddr_copy(&recent_packets[recent_packet_ptr].sent_to,
|
||||
&rimeaddr_null);
|
||||
}
|
||||
} else if(packetbuf_attr(PACKETBUF_ATTR_TTL) <= 1) {
|
||||
|
||||
recent_packet_ptr = (recent_packet_ptr + 1) % NUM_RECENT_PACKETS;
|
||||
|
||||
if(tc->rtmetric == SINK) {
|
||||
|
||||
/* If we are the sink, we call the receive function. */
|
||||
|
||||
send_ack(tc, &ack_to, 0, 0, 0);
|
||||
|
||||
PRINTF("%d.%d: sink received packet %d from %d.%d via %d.%d\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
||||
packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID),
|
||||
packetbuf_addr(PACKETBUF_ADDR_ESENDER)->u8[0],
|
||||
packetbuf_addr(PACKETBUF_ADDR_ESENDER)->u8[1],
|
||||
from->u8[0], from->u8[1]);
|
||||
|
||||
if(tc->cb->recv != NULL) {
|
||||
tc->cb->recv(packetbuf_addr(PACKETBUF_ADDR_ESENDER),
|
||||
packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID),
|
||||
packetbuf_attr(PACKETBUF_ATTR_HOPS));
|
||||
}
|
||||
return;
|
||||
} else if(packetbuf_attr(PACKETBUF_ATTR_TTL) > 1 &&
|
||||
tc->rtmetric != RTMETRIC_MAX) {
|
||||
|
||||
/* If we are not the sink, we forward the packet to the best
|
||||
neighbor. */
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_HOPS, packetbuf_attr(PACKETBUF_ATTR_HOPS) + 1);
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_TTL, packetbuf_attr(PACKETBUF_ATTR_TTL) - 1);
|
||||
|
||||
|
||||
PRINTF("%d.%d: packet received from %d.%d via %d.%d, sending %d\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
||||
packetbuf_addr(PACKETBUF_ADDR_ESENDER)->u8[0],
|
||||
packetbuf_addr(PACKETBUF_ADDR_ESENDER)->u8[1],
|
||||
from->u8[0], from->u8[1], tc->sending);
|
||||
|
||||
if(packetqueue_enqueue_packetbuf(&sending_queue, FORWARD_PACKET_LIFETIME,
|
||||
tc)) {
|
||||
send_ack(tc, &ack_to, 0, 0, 0);
|
||||
send_queued_packet();
|
||||
} else {
|
||||
send_ack(tc, &ack_to, 0, 1, 0);
|
||||
PRINTF("%d.%d: packet dropped: no queue buffer available\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
|
||||
}
|
||||
} else if(packetbuf_attr(PACKETBUF_ATTR_TTL) <= 1) {
|
||||
PRINTF("%d.%d: packet dropped: ttl %d\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
||||
packetbuf_attr(PACKETBUF_ATTR_TTL));
|
||||
send_ack(tc, &ack_to, 0, 1, 1);
|
||||
}
|
||||
} else if(packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) ==
|
||||
PACKETBUF_ATTR_PACKET_TYPE_ACK) {
|
||||
PRINTF("Collect: incoming ack %d from %d.%d (%d.%d) seqno %d (%d)\n",
|
||||
packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE),
|
||||
packetbuf_addr(PACKETBUF_ADDR_SENDER)->u8[0],
|
||||
packetbuf_addr(PACKETBUF_ADDR_SENDER)->u8[1],
|
||||
tc->current_receiver.u8[0],
|
||||
tc->current_receiver.u8[1],
|
||||
packetbuf_attr(PACKETBUF_ATTR_PACKET_ID),
|
||||
tc->seqno);
|
||||
handle_ack(tc);
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
node_packet_sent(struct runicast_conn *c, const rimeaddr_t *to,
|
||||
uint8_t transmissions)
|
||||
node_packet_sent(struct unicast_conn *c, int status, int transmissions)
|
||||
{
|
||||
struct collect_conn *tc = (struct collect_conn *)
|
||||
((char *)c - offsetof(struct collect_conn, runicast_conn));
|
||||
((char *)c - offsetof(struct collect_conn, unicast_conn));
|
||||
|
||||
PRINTF("%d.%d: sent to %d.%d after %d retransmissions\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
||||
to->u8[0], to->u8[1],
|
||||
transmissions);
|
||||
/* For data packets, we record the number of transmissions */
|
||||
if(packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) ==
|
||||
PACKETBUF_ATTR_PACKET_TYPE_DATA) {
|
||||
PRINTF("%d.%d: sent to %d.%d after %d transmissions\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
||||
tc->current_receiver.u8[0], tc->current_receiver.u8[1],
|
||||
transmissions);
|
||||
|
||||
/* neighbor_update_etx(neighbor_find(to), transmissions);
|
||||
update_rtmetric(tc);*/
|
||||
tc->transmissions += transmissions;
|
||||
|
||||
tc->forwarding = 0;
|
||||
neighbor_update_etx(neighbor_find(to), transmissions);
|
||||
update_rtmetric(tc);
|
||||
|
||||
/* Remove the first packet on the queue, the packet that was just sent. */
|
||||
packetqueue_dequeue(&forwarding_queue);
|
||||
|
||||
/* Send the next packet in the queue, if any. */
|
||||
send_queued_packet();
|
||||
/* Update ETX with the number of transmissions. */
|
||||
PRINTF("Updating ETX with %d transmissions\n", tc->transmissions);
|
||||
neighbor_update_etx(neighbor_find(&tc->current_receiver), tc->transmissions);
|
||||
update_rtmetric(tc);
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
node_packet_timedout(struct runicast_conn *c, const rimeaddr_t *to,
|
||||
uint8_t transmissions)
|
||||
timedout(struct collect_conn *tc)
|
||||
{
|
||||
struct collect_conn *tc = (struct collect_conn *)
|
||||
((char *)c - offsetof(struct collect_conn, runicast_conn));
|
||||
|
||||
PRINTF("%d.%d: timedout after %d retransmissions: packet dropped\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1], transmissions);
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1], tc->transmissions);
|
||||
|
||||
tc->forwarding = 0;
|
||||
neighbor_timedout_etx(neighbor_find(to), transmissions);
|
||||
tc->sending = 0;
|
||||
neighbor_timedout_etx(neighbor_find(&tc->current_receiver), tc->transmissions);
|
||||
update_rtmetric(tc);
|
||||
|
||||
/* Remove the first packet on the queue, the packet that just timed out. */
|
||||
packetqueue_dequeue(&forwarding_queue);
|
||||
send_next_packet(tc);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
retransmit_callback(void *ptr)
|
||||
{
|
||||
struct collect_conn *c = ptr;
|
||||
|
||||
/* Send the next packet in the queue, if any. */
|
||||
send_queued_packet();
|
||||
PRINTF("retransmit\n");
|
||||
if(c->transmissions >= c->max_rexmits) {
|
||||
timedout(c);
|
||||
} else {
|
||||
c->sending = 0;
|
||||
send_queued_packet();
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#if !COLLECT_ANNOUNCEMENTS
|
||||
|
|
@ -421,9 +607,8 @@ received_announcement(struct announcement *a, const rimeaddr_t *from,
|
|||
}
|
||||
#endif /* !COLLECT_ANNOUNCEMENTS */
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static const struct runicast_callbacks runicast_callbacks = {node_packet_received,
|
||||
node_packet_sent,
|
||||
node_packet_timedout};
|
||||
static const struct unicast_callbacks unicast_callbacks = {node_packet_received,
|
||||
node_packet_sent};
|
||||
#if !COLLECT_ANNOUNCEMENTS
|
||||
static const struct neighbor_discovery_callbacks neighbor_discovery_callbacks =
|
||||
{ adv_received, NULL};
|
||||
|
|
@ -439,19 +624,19 @@ collect_open(struct collect_conn *tc, uint16_t channels,
|
|||
CLOCK_SECOND * 32,
|
||||
CLOCK_SECOND * 600,
|
||||
&neighbor_discovery_callbacks);
|
||||
#endif /* !COLLECT_ANNOUNCEMENTS */
|
||||
runicast_open(&tc->runicast_conn, channels + 1, &runicast_callbacks);
|
||||
channel_set_attributes(channels + 1, attributes);
|
||||
tc->rtmetric = RTMETRIC_MAX;
|
||||
tc->cb = cb;
|
||||
#if COLLECT_ANNOUNCEMENTS
|
||||
neighbor_discovery_start(&tc->neighbor_discovery_conn, tc->rtmetric);
|
||||
#else /* !COLLECT_ANNOUNCEMENTS */
|
||||
announcement_register(&tc->announcement, channels, tc->rtmetric,
|
||||
received_announcement);
|
||||
announcement_listen(2);
|
||||
#else
|
||||
neighbor_discovery_start(&tc->neighbor_discovery_conn, tc->rtmetric);
|
||||
#endif /* COLLECT_ANNOUNCEMENTS */
|
||||
#endif /* !COLLECT_ANNOUNCEMENTS */
|
||||
|
||||
unicast_open(&tc->unicast_conn, channels + 1, &unicast_callbacks);
|
||||
channel_set_attributes(channels + 1, attributes);
|
||||
tc->rtmetric = RTMETRIC_MAX;
|
||||
tc->cb = cb;
|
||||
neighbor_init();
|
||||
packetqueue_init(&sending_queue);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
|
|
@ -462,7 +647,7 @@ collect_close(struct collect_conn *tc)
|
|||
#else
|
||||
neighbor_discovery_close(&tc->neighbor_discovery_conn);
|
||||
#endif /* COLLECT_ANNOUNCEMENTS */
|
||||
runicast_close(&tc->runicast_conn);
|
||||
unicast_close(&tc->unicast_conn);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
|
|
@ -487,12 +672,19 @@ collect_send(struct collect_conn *tc, int rexmits)
|
|||
{
|
||||
struct neighbor *n;
|
||||
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_EPACKET_ID, tc->seqno++);
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_EPACKET_ID, tc->eseqno++);
|
||||
packetbuf_set_addr(PACKETBUF_ADDR_ESENDER, &rimeaddr_node_addr);
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_HOPS, 1);
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_TTL, MAX_HOPLIM);
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_MAX_REXMIT, rexmits);
|
||||
|
||||
PRINTF("%d.%d: originating packet %d\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
||||
packetbuf_attr(PACKETBUF_ATTR_EPACKET_ID));
|
||||
|
||||
|
||||
PRINTF("rexmit %d\n", rexmits);
|
||||
|
||||
if(tc->rtmetric == SINK) {
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_HOPS, 0);
|
||||
if(tc->cb->recv != NULL) {
|
||||
|
|
@ -502,6 +694,7 @@ collect_send(struct collect_conn *tc, int rexmits)
|
|||
}
|
||||
return 1;
|
||||
} else {
|
||||
update_rtmetric(tc);
|
||||
n = neighbor_best();
|
||||
if(n != NULL) {
|
||||
#if CONTIKI_TARGET_NETSIM
|
||||
|
|
@ -510,7 +703,7 @@ collect_send(struct collect_conn *tc, int rexmits)
|
|||
PRINTF("%d.%d: sending to %d.%d\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
||||
n->addr.u8[0], n->addr.u8[1]);
|
||||
if(packetqueue_enqueue_packetbuf(&forwarding_queue, FORWARD_PACKET_LIFETIME,
|
||||
if(packetqueue_enqueue_packetbuf(&sending_queue, FORWARD_PACKET_LIFETIME,
|
||||
tc)) {
|
||||
send_queued_packet();
|
||||
return 1;
|
||||
|
|
@ -519,13 +712,12 @@ collect_send(struct collect_conn *tc, int rexmits)
|
|||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
|
||||
}
|
||||
} else {
|
||||
/* printf("Didn't find any neighbor\n");*/
|
||||
PRINTF("%d.%d: did not find any neighbor to send to\n",
|
||||
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
|
||||
#if COLLECT_ANNOUNCEMENTS
|
||||
announcement_listen(1);
|
||||
#endif /* COLLECT_ANNOUNCEMENTS */
|
||||
if(packetqueue_enqueue_packetbuf(&forwarding_queue, FORWARD_PACKET_LIFETIME,
|
||||
if(packetqueue_enqueue_packetbuf(&sending_queue, FORWARD_PACKET_LIFETIME,
|
||||
tc)) {
|
||||
return 1;
|
||||
} else {
|
||||
|
|
|
|||
|
|
@ -47,7 +47,7 @@
|
|||
*
|
||||
* This file is part of the Contiki operating system.
|
||||
*
|
||||
* $Id: collect.h,v 1.12 2010/02/23 18:35:23 adamdunkels Exp $
|
||||
* $Id: collect.h,v 1.13 2010/02/28 09:18:01 adamdunkels Exp $
|
||||
*/
|
||||
|
||||
/**
|
||||
|
|
@ -64,12 +64,16 @@
|
|||
#include "net/rime/runicast.h"
|
||||
#include "net/rime/neighbor-discovery.h"
|
||||
|
||||
#define COLLECT_ATTRIBUTES { PACKETBUF_ADDR_ESENDER, PACKETBUF_ADDRSIZE }, \
|
||||
{ PACKETBUF_ATTR_EPACKET_ID, PACKETBUF_ATTR_BIT * 4 }, \
|
||||
{ PACKETBUF_ATTR_TTL, PACKETBUF_ATTR_BIT * 4 }, \
|
||||
{ PACKETBUF_ATTR_HOPS, PACKETBUF_ATTR_BIT * 4 }, \
|
||||
{ PACKETBUF_ATTR_MAX_REXMIT, PACKETBUF_ATTR_BIT * 3 }, \
|
||||
RUNICAST_ATTRIBUTES
|
||||
#define COLLECT_PACKET_ID_BITS 4
|
||||
|
||||
#define COLLECT_ATTRIBUTES { PACKETBUF_ADDR_ESENDER, PACKETBUF_ADDRSIZE }, \
|
||||
{ PACKETBUF_ATTR_EPACKET_ID, PACKETBUF_ATTR_BIT * 4 }, \
|
||||
{ PACKETBUF_ATTR_PACKET_ID, PACKETBUF_ATTR_BIT * COLLECT_PACKET_ID_BITS }, \
|
||||
{ PACKETBUF_ATTR_TTL, PACKETBUF_ATTR_BIT * 4 }, \
|
||||
{ PACKETBUF_ATTR_HOPS, PACKETBUF_ATTR_BIT * 4 }, \
|
||||
{ PACKETBUF_ATTR_MAX_REXMIT, PACKETBUF_ATTR_BIT * 3 }, \
|
||||
{ PACKETBUF_ATTR_PACKET_TYPE, PACKETBUF_ATTR_BIT }, \
|
||||
UNICAST_ATTRIBUTES
|
||||
|
||||
struct collect_callbacks {
|
||||
void (* recv)(const rimeaddr_t *originator, uint8_t seqno,
|
||||
|
|
@ -77,7 +81,7 @@ struct collect_callbacks {
|
|||
};
|
||||
|
||||
struct collect_conn {
|
||||
struct runicast_conn runicast_conn;
|
||||
struct unicast_conn unicast_conn;
|
||||
#if ! COLLECT_CONF_ANNOUNCEMENTS
|
||||
struct neighbor_discovery_conn neighbor_discovery_conn;
|
||||
#else /* ! COLLECT_CONF_ANNOUNCEMENTS */
|
||||
|
|
@ -86,8 +90,12 @@ struct collect_conn {
|
|||
const struct collect_callbacks *cb;
|
||||
struct ctimer t;
|
||||
uint16_t rtmetric;
|
||||
uint8_t forwarding;
|
||||
uint8_t seqno;
|
||||
uint8_t sending, transmissions, max_rexmits;
|
||||
uint8_t seqno, last_received_seqno;
|
||||
rimeaddr_t last_received_addr;
|
||||
uint8_t eseqno;
|
||||
struct ctimer retransmission_timer;
|
||||
rimeaddr_t current_receiver;
|
||||
};
|
||||
|
||||
void collect_open(struct collect_conn *c, uint16_t channels,
|
||||
|
|
|
|||
Loading…
Reference in a new issue