Apple-2-SW/contiki
1
0
Fork 0
mirror of https://github.com/oliverschmidt/contiki.git synced 2024-07-09 23:28:59 +00:00
Code Issues Projects Releases Wiki Activity

Always restore the queuebuf to the packetbuf before calling the upper layers. Reduce the waiting time between successive MAC layer retransmissions.

Browse Source
This commit is contained in:
adamdunkels 2010-10-24 21:07:00 +00:00
parent 73f5535754
commit 8fa7bf6c31
1 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
core/net/mac/csma.c
View File

@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: csma.c,v 1.21 2010/10/14 19:08:39 nifi Exp $
* $Id: csma.c,v 1.22 2010/10/24 21:07:00 adamdunkels Exp $
*/
/**
@ -103,9 +103,10 @@ retransmit_packet(void *ptr)
static void
free_packet(struct queued_packet *q)
{
// printf("free_packet %p\n", q);
ctimer_stop(&q->retransmit_timer);
queuebuf_free(q->buf);
memb_free(&packet_memb, q);
ctimer_stop(&q->retransmit_timer);
}
/*---------------------------------------------------------------------------*/
static void
@ -117,6 +118,8 @@ packet_sent(void *ptr, int status, int num_transmissions)
void *cptr;
int num_tx;
// printf("packet_sent %p\n", q);
switch(status) {
case MAC_TX_OK:
case MAC_TX_NOACK:
@ -143,7 +146,7 @@ packet_sent(void *ptr, int status, int num_transmissions)
switch(status) {
case MAC_TX_COLLISION:
PRINTF("csma: rexmit collision %d\n", q->transmissions);
break;
break;
case MAC_TX_NOACK:
PRINTF("csma: rexmit noack %d\n", q->transmissions);
break;
@ -165,7 +168,7 @@ 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->transmissions + 1) * 3 * time));
time = time + (random_rand() % ((q->transmissions + 1) * 2 * time));
if(q->transmissions + q->collisions < q->max_transmissions) {
PRINTF("csma: retransmitting with time %lu %p\n", time, q);
@ -173,16 +176,20 @@ packet_sent(void *ptr, int status, int num_transmissions)
retransmit_packet, q);
} else {
PRINTF("csma: drop after %d\n", q->transmissions);
queuebuf_to_packetbuf(q->buf);
free_packet(q);
// printf("call 1 %p\n", cptr);
mac_call_sent_callback(sent, cptr, status, num_tx);
}
} else {
} else {
if(status == MAC_TX_OK) {
PRINTF("csma: rexmit ok %d\n", q->transmissions);
} else {
PRINTF("csma: rexmit failed %d: %d\n", q->transmissions, status);
}
queuebuf_to_packetbuf(q->buf);
free_packet(q);
// printf("call 2 %p\n", cptr);
mac_call_sent_callback(sent, cptr, status, num_tx);
}
}
@ -198,6 +205,7 @@ send_packet(mac_callback_t sent, void *ptr)
/* Remember packet for later. */
q = memb_alloc(&packet_memb);
if(q != NULL) {
// printf("send_packet %p\n", q);
q->buf = queuebuf_new_from_packetbuf();
if(q != NULL) {
if(packetbuf_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS) == 0) {