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Merge pull request #1167 from bkozak-scanimetrics/contikimac_fix_qsend_list_packetbuf_pending

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Fix Mishandling of PENDING/Queued Packets at ContikiMAC and CSMA
This commit is contained in:
Simon Duquennoy 2015-10-23 10:52:17 +02:00
commit b979beb075
2 changed files with 12 additions and 7 deletions
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7
core/net/mac/contikimac/contikimac.c
View File

@ -805,6 +805,7 @@ qsend_list(mac_callback_t sent, void *ptr, struct rdc_buf_list *buf_list)
struct rdc_buf_list *next;
int ret;
int is_receiver_awake;
int pending;
if(buf_list == NULL) {
return;
@ -849,7 +850,9 @@ qsend_list(mac_callback_t sent, void *ptr, struct rdc_buf_list *buf_list)
/* Prepare the packetbuf */
queuebuf_to_packetbuf(curr->buf);
pending = packetbuf_attr(PACKETBUF_ATTR_PENDING);
/* Send the current packet */
ret = send_packet(sent, ptr, curr, is_receiver_awake);
if(ret != MAC_TX_DEFERRED) {
@ -866,7 +869,7 @@ qsend_list(mac_callback_t sent, void *ptr, struct rdc_buf_list *buf_list)
/* The transmission failed, we stop the burst */
next = NULL;
}
} while((next != NULL) && packetbuf_attr(PACKETBUF_ATTR_PENDING));
} while((next != NULL) && pending);
}
/*---------------------------------------------------------------------------*/
/* Timer callback triggered when receiving a burst, after having

12
core/net/mac/csma.c
View File

@ -171,8 +171,10 @@ transmit_packet_list(void *ptr)
}
/*---------------------------------------------------------------------------*/
static void
free_packet(struct neighbor_queue *n, struct rdc_buf_list *p)
free_packet(struct neighbor_queue *n, struct rdc_buf_list *p, int status)
{
clock_time_t tx_delay;
if(p != NULL) {
/* Remove packet from list and deallocate */
list_remove(n->queued_packet_list, p);
@ -188,8 +190,8 @@ free_packet(struct neighbor_queue *n, struct rdc_buf_list *p)
n->collisions = 0;
n->deferrals = 0;
/* Set a timer for next transmissions */
ctimer_set(&n->transmit_timer, default_timebase(),
transmit_packet_list, n);
tx_delay = (status == MAC_TX_OK) ? 0 : default_timebase();
ctimer_set(&n->transmit_timer, tx_delay, transmit_packet_list, n);
} else {
/* This was the last packet in the queue, we free the neighbor */
ctimer_stop(&n->transmit_timer);
@ -293,7 +295,7 @@ packet_sent(void *ptr, int status, int num_transmissions)
} else {
PRINTF("csma: drop with status %d after %d transmissions, %d collisions\n",
status, n->transmissions, n->collisions);
free_packet(n, q);
free_packet(n, q, status);
mac_call_sent_callback(sent, cptr, status, num_tx);
}
} else {
@ -302,7 +304,7 @@ packet_sent(void *ptr, int status, int num_transmissions)
} else {
PRINTF("csma: rexmit failed %d: %d\n", n->transmissions, status);
}
free_packet(n, q);
free_packet(n, q, status);
mac_call_sent_callback(sent, cptr, status, num_tx);
}
} else {