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Improved handling of duplicate packets

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This commit is contained in:
adamdunkels 2010-04-08 09:32:56 +00:00
parent 6d9f904627
commit 91ff8574ad
3 changed files with 40 additions and 19 deletions
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9
core/net/mac/csma.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: csma.c,v 1.15 2010/03/26 12:29:29 nifi Exp $
* $Id: csma.c,v 1.16 2010/04/08 09:33:37 adamdunkels Exp $
*/
/**
@ -164,7 +164,7 @@ packet_sent(void *ptr, int status, int num_transmissions)
/* The retransmission time uses a linear backoff so that the
interval between the transmissions increase with each
retransmit. */
time = time + (random_rand() % ((q->collisions + q->transmissions) * 3 * time));
time = time + (random_rand() % ((q->transmissions + 1) * 3 * time));
if(q->transmissions < q->max_transmissions) {
PRINTF("csma: retransmitting with time %lu\n", time);
@ -186,7 +186,10 @@ static void
send_packet(mac_callback_t sent, void *ptr)
{
struct queued_packet *q;
static uint16_t seqno;
packetbuf_set_attr(PACKETBUF_ATTR_MAC_SEQNO, seqno++);
/* Remember packet for later. */
q = memb_alloc(&packet_memb);
if(q != NULL) {