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TSCH: use sequence number only for unicast data frames

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This commit is contained in:
Simon Duquennoy 2016-06-23 18:25:52 +02:00 • committed by Simon Duquennoy
parent f1922c13b6
commit beb532e7e8
4 changed files with 14 additions and 20 deletions
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23
core/net/mac/tsch/tsch.c
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@ -134,7 +134,7 @@ struct asn_t current_asn;
/* Device rank or join priority:
* For PAN coordinator: 0 -- lower is better */
uint8_t tsch_join_priority;
/* The current TSCH sequence number, used for both data and EBs */
/* The current TSCH sequence number, used for unicast data frames only */
static uint8_t tsch_packet_seqno = 0;
/* Current period for EB output */
static clock_time_t tsch_current_eb_period;
@ -728,12 +728,7 @@ PROCESS_THREAD(tsch_send_eb_process, ev, data)
uint8_t tsch_sync_ie_offset;
/* Prepare the EB packet and schedule it to be sent */
packetbuf_clear();
/* We don't use seqno 0 */
if(++tsch_packet_seqno == 0) {
tsch_packet_seqno++;
}
packetbuf_set_attr(PACKETBUF_ATTR_FRAME_TYPE, FRAME802154_BEACONFRAME);
packetbuf_set_attr(PACKETBUF_ATTR_MAC_SEQNO, tsch_packet_seqno);
#if LLSEC802154_ENABLED
if(tsch_is_pan_secured) {
/* Set security level, key id and index */
@ -743,7 +738,7 @@ PROCESS_THREAD(tsch_send_eb_process, ev, data)
}
#endif /* LLSEC802154_ENABLED */
eb_len = tsch_packet_create_eb(packetbuf_dataptr(), PACKETBUF_SIZE,
tsch_packet_seqno, &hdr_len, &tsch_sync_ie_offset);
&hdr_len, &tsch_sync_ie_offset);
if(eb_len != 0) {
struct tsch_packet *p;
packetbuf_set_datalen(eb_len);
@ -876,14 +871,14 @@ send_packet(mac_callback_t sent, void *ptr)
return;
}
/* PACKETBUF_ATTR_MAC_SEQNO cannot be zero, due to a pecuilarity
in framer-802154.c. */
if(++tsch_packet_seqno == 0) {
tsch_packet_seqno++;
}
/* Ask for ACK if we are sending anything other than broadcast */
if(!linkaddr_cmp(addr, &linkaddr_null)) {
/* PACKETBUF_ATTR_MAC_SEQNO cannot be zero, due to a pecuilarity
in framer-802154.c. */
if(++tsch_packet_seqno == 0) {
tsch_packet_seqno++;
}
packetbuf_set_attr(PACKETBUF_ATTR_MAC_SEQNO, tsch_packet_seqno);
packetbuf_set_attr(PACKETBUF_ATTR_MAC_ACK, 1);
} else {
/* Broadcast packets shall be added to broadcast queue
@ -893,7 +888,6 @@ send_packet(mac_callback_t sent, void *ptr)
}
packetbuf_set_attr(PACKETBUF_ATTR_FRAME_TYPE, FRAME802154_DATAFRAME);
packetbuf_set_attr(PACKETBUF_ATTR_MAC_SEQNO, tsch_packet_seqno);
#if LLSEC802154_ENABLED
if(tsch_is_pan_secured) {
@ -949,7 +943,6 @@ packet_input(void)
/* Check for duplicates */
duplicate = mac_sequence_is_duplicate();
if(duplicate) {
extern clock_time_t duplicate_age;
/* Drop the packet. */
PRINTF("TSCH:! drop dup ll from %u seqno %u\n",
TSCH_LOG_ID_FROM_LINKADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER)),