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Don't count collisions as transmissions

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This commit is contained in:
adamdunkels 2010-02-28 10:07:17 +00:00
parent f95a6cce85
commit 74da90a06b
1 changed files with 9 additions and 4 deletions
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13
core/net/mac/csma.c
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@ -28,12 +28,12 @@
*
* This file is part of the Contiki operating system.
*
* $Id: csma.c,v 1.9 2010/02/28 08:35:16 adamdunkels Exp $
* $Id: csma.c,v 1.10 2010/02/28 10:07:17 adamdunkels Exp $
*/
/**
* \file
* A MAC
* A Carrier Sense Multiple Access (CSMA) MAC layer
* \author
* Adam Dunkels <adam@sics.se>
*/
@ -69,6 +69,7 @@ struct queued_packet {
mac_callback_t sent;
void *cptr;
uint8_t transmissions, max_transmissions;
uint8_t collisions;
};
#define MAX_QUEUED_PACKETS 8
@ -97,7 +98,7 @@ packet_sent(void *ptr, int status, int num_transmissions)
sent = q->sent;
cptr = q->cptr;
num_tx = q->transmissions;
num_tx = q->transmissions - q->collisions;
if(status != MAC_TX_OK) {
switch(status) {
@ -178,6 +179,9 @@ sent_packet(void *ptr, int status, int num_transmissions)
/* If the packet couldn't be sent because of a collision or the
lack of an ACK, we let the other transmissions get through
before we try again. */
if(status == MAC_TX_COLLISION) {
q->collisions++;
}
time = NETSTACK_RDC.channel_check_interval();
if(time == 0) {
time = CLOCK_SECOND;
@ -193,7 +197,7 @@ sent_packet(void *ptr, int status, int num_transmissions)
sent = q->sent;
cptr = q->cptr;
num_tx = q->transmissions;
num_tx = q->transmissions - q->collisions;
free_packet(q);
mac_call_sent_callback(sent, cptr, status, num_tx);
}
@ -211,6 +215,7 @@ send_packet(mac_callback_t sent, void *ptr)
if(q != NULL) {
q->max_transmissions = packetbuf_attr(PACKETBUF_ATTR_MAX_MAC_REXMIT) + 1;
q->transmissions = 1;
q->collisions = 0;
q->sent = sent;
q->cptr = ptr;
NETSTACK_RDC.send(sent_packet, q);