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Bugfix: the defensive retransmission timer setting must be made before the packet is transmitted, otherwise the retransmission timer will always be for the defensive retransmit

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This commit is contained in:
adamdunkels 2011-01-09 23:49:27 +00:00
parent 50a3e6ea23
commit 148bd60fe1
1 changed files with 12 additions and 20 deletions
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32
core/net/rime/collect.c
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@ -33,7 +33,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: collect.c,v 1.70 2011/01/09 21:13:20 adamdunkels Exp $
* $Id: collect.c,v 1.71 2011/01/09 23:49:27 adamdunkels Exp $
*/
/**
@ -127,7 +127,6 @@ struct ack_msg {
#define MAX_MAC_REXMITS 2
#define MAX_ACK_MAC_REXMITS 5
#define REXMIT_TIME CLOCK_SECOND * 4
#define MAX_REXMIT_TIME_SCALING 0
#define FORWARD_PACKET_LIFETIME_BASE REXMIT_TIME
#define MAX_SENDING_QUEUE 3 * QUEUEBUF_NUM / 4
#define KEEPALIVE_REXMITS 8
@ -161,15 +160,6 @@ MEMB(send_queue_memb, struct packetqueue_item, MAX_SENDING_QUEUE);
#define PROACTIVE_PROBING_INTERVAL (random_rand() % CLOCK_SECOND * 60)
#define PROACTIVE_PROBING_REXMITS 15
/* COLLECT_CONF_ANNOUNCEMENTS defines if the Collect implementation
should use Contiki's announcement primitive to announce its routes
or if it should use periodic broadcasts. */
#ifndef COLLECT_CONF_ANNOUNCEMENTS
#define COLLECT_ANNOUNCEMENTS 0
#else
#define COLLECT_ANNOUNCEMENTS COLLECT_CONF_ANNOUNCEMENTS
#endif /* COLLECT_CONF_ANNOUNCEMENTS */
/* The ANNOUNCEMENT_SCAN_TIME defines for how long the Collect
implementation should listen for announcements from other nodes
when it requires a route. */
@ -319,7 +309,9 @@ update_parent(struct collect_conn *tc)
stats.foundroute++;
bump_advertisement(tc);
} else {
// printf("#A e=%d\n", collect_neighbor_link_estimate(best));
if(DRAW_TREE) {
printf("#A e=%d\n", collect_neighbor_link_estimate(best));
}
if(collect_neighbor_rtmetric_link_estimate(best) +
SIGNIFICANT_RTMETRIC_PARENT_CHANGE <
collect_neighbor_rtmetric_link_estimate(current)) {
@ -427,7 +419,6 @@ update_rtmetric(struct collect_conn *tc)
if(tc->is_router) {
/* If we are a router, we update our advertised rtmetric. */
#if COLLECT_ANNOUNCEMENTS
announcement_set_value(&tc->announcement, tc->rtmetric);
#else /* COLLECT_ANNOUNCEMENTS */
@ -485,19 +476,20 @@ static void
send_packet(struct collect_conn *c, struct collect_neighbor *n)
{
clock_time_t time;
uint8_t rexmit_time_scaling;
PRINTF("Sending packet to %d.%d, %d transmissions\n",
n->addr.u8[0], n->addr.u8[1],
c->transmissions);
unicast_send(&c->unicast_conn, &n->addr);
/* If the MAC layer won't call us back, we'll set up the
retransmission timer with a high timeout, so that we can cancel
the transmission and send a new one. */
/* Defensive programming: if a bug in the MAC/RDC layers will cause
it to not call us back, we'll set up the retransmission timer
with a high timeout, so that we can cancel the transmission and
send a new one. */
time = 16 * REXMIT_TIME;
ctimer_set(&c->retransmission_timer, time,
retransmit_not_sent_callback, c);
c->send_time = clock_time();
unicast_send(&c->unicast_conn, &n->addr);
}
/*---------------------------------------------------------------------------*/
static void
@ -1104,7 +1096,7 @@ node_packet_sent(struct unicast_conn *c, int status, int transmissions)
PACKETBUF_ATTR_PACKET_TYPE_DATA) {
tc->transmissions += transmissions;
// printf("tx %d\n", tc->transmissions);
PRINTF("tx %d\n", tc->transmissions);
PRINTF("%d.%d: MAC sent %d transmissions to %d.%d, status %d, total transmissions %d\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
transmissions,
@ -1115,7 +1107,7 @@ node_packet_sent(struct unicast_conn *c, int status, int transmissions)
stats.timedout++;
} else {
clock_time_t time = REXMIT_TIME / 2 + (random_rand() % (REXMIT_TIME / 2));
// printf("retransmission time %lu scaling %d\n", time, rexmit_time_scaling);
PRINTF("retransmission time %lu\n", time);
ctimer_set(&tc->retransmission_timer, time,
retransmit_callback, tc);
}