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Changed the behaviour of retransmissions to work better with the in-order CSMA code. The retransmission timer is now set when the packet is known to be sent by the MAC layer.

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This commit is contained in:
adamdunkels 2010-12-16 22:45:15 +00:00
parent 4a89cc9db3
commit 19e930e6f2
1 changed files with 21 additions and 14 deletions
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35
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 1.67 2010/12/14 22:14:33 dak664 Exp $
* $Id: collect.c,v 1.68 2010/12/16 22:45:15 adamdunkels Exp $
*/
/**
@ -125,8 +125,8 @@ struct ack_msg {
specifies the maximum length of the output queue. If the queue is
full, incoming packets are dropped instead of being forwarded. */
#define MAX_MAC_REXMITS 2
#define MAX_ACK_MAC_REXMITS 7
#define REXMIT_TIME CLOCK_SECOND * 6
#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
@ -498,8 +498,9 @@ send_packet(struct collect_conn *c, struct collect_neighbor *n)
time = 3 * time / 2 + (random_rand() % (time / 4));*/
time = 3 * REXMIT_TIME / 4 + (random_rand() % (REXMIT_TIME / 4));
// printf("retransmission time %lu scaling %d\n", time, rexmit_time_scaling);
ctimer_set(&c->retransmission_timer, time,
retransmit_not_sent_callback, c);
/* ctimer_set(&c->retransmission_timer, time,
retransmit_not_sent_callback, c);*/
c->send_time = clock_time();
}
/*---------------------------------------------------------------------------*/
static void
@ -781,6 +782,12 @@ handle_ack(struct collect_conn *tc)
&tc->current_parent) &&
packetbuf_attr(PACKETBUF_ATTR_PACKET_ID) == tc->seqno) {
/* printf("rtt %d / %d = %d.%02d\n",
(int)(clock_time() - tc->send_time),
(int)CLOCK_SECOND,
(int)((clock_time() - tc->send_time) / CLOCK_SECOND),
(int)(((100 * (clock_time() - tc->send_time)) / CLOCK_SECOND) % 100));*/
stats.ackrecv++;
msg = packetbuf_dataptr();
memcpy(&rtmetric, &msg->rtmetric, sizeof(uint16_t));
@ -1041,8 +1048,8 @@ node_packet_received(struct unicast_conn *c, const rimeaddr_t *from)
} else {
send_ack(tc, &ack_to,
ackflags | ACK_FLAGS_DROPPED | ACK_FLAGS_CONGESTED);
/* printf("%d.%d: packet dropped: no queue buffer available\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);*/
PRINTF("%d.%d: packet dropped: no queue buffer available\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
stats.qdrop++;
}
} else if(packetbuf_attr(PACKETBUF_ATTR_TTL) <= 1) {
@ -1073,10 +1080,10 @@ static void
timedout(struct collect_conn *tc)
{
struct collect_neighbor *n;
/* printf("%d.%d: timedout after %d retransmissions to %d.%d (max retransmissions %d): packet dropped\n",
PRINTF("%d.%d: timedout after %d retransmissions to %d.%d (max retransmissions %d): packet dropped\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1], tc->transmissions,
tc->current_parent.u8[0], tc->current_parent.u8[1],
tc->max_rexmits);*/
tc->max_rexmits);
tc->sending = 0;
n = collect_neighbor_list_find(&tc->neighbor_list,
@ -1110,7 +1117,7 @@ node_packet_sent(struct unicast_conn *c, int status, int transmissions)
timedout(tc);
stats.timedout++;
} else {
clock_time_t time = (random_rand() % (REXMIT_TIME / 4));
clock_time_t time = REXMIT_TIME / 2 + (random_rand() % (REXMIT_TIME / 2));
// printf("retransmission time %lu scaling %d\n", time, rexmit_time_scaling);
ctimer_set(&tc->retransmission_timer, time,
retransmit_callback, tc);
@ -1437,8 +1444,8 @@ collect_send(struct collect_conn *tc, int rexmits)
send_queued_packet(tc);
return 1;
} else {
/* printf("%d.%d: drop originated packet: no queuebuf\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);*/
PRINTF("%d.%d: drop originated packet: no queuebuf\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
}
} else {
@ -1462,8 +1469,8 @@ collect_send(struct collect_conn *tc, int rexmits)
tc)) {
return 1;
} else {
/* printf("%d.%d: drop originated packet: no queuebuf\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);*/
PRINTF("%d.%d: drop originated packet: no queuebuf\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
}
}
}