55 #if CONTIKI_TARGET_COOJA 56 #include "lib/simEnvChange.h" 57 #include "sys/cooja_mt.h" 63 #ifndef TSCH_DEBUG_INIT 64 #define TSCH_DEBUG_INIT() 66 #ifndef TSCH_DEBUG_INTERRUPT 67 #define TSCH_DEBUG_INTERRUPT() 69 #ifndef TSCH_DEBUG_RX_EVENT 70 #define TSCH_DEBUG_RX_EVENT() 72 #ifndef TSCH_DEBUG_TX_EVENT 73 #define TSCH_DEBUG_TX_EVENT() 75 #ifndef TSCH_DEBUG_SLOT_START 76 #define TSCH_DEBUG_SLOT_START() 78 #ifndef TSCH_DEBUG_SLOT_END 79 #define TSCH_DEBUG_SLOT_END() 83 #if (TSCH_MAX_INCOMING_PACKETS & (TSCH_MAX_INCOMING_PACKETS - 1)) != 0 84 #error TSCH_MAX_INCOMING_PACKETS must be power of two 88 #if TSCH_DEQUEUED_ARRAY_SIZE < QUEUEBUF_NUM 89 #error TSCH_DEQUEUED_ARRAY_SIZE must be greater or equal to QUEUEBUF_NUM 91 #if (TSCH_DEQUEUED_ARRAY_SIZE & (TSCH_DEQUEUED_ARRAY_SIZE - 1)) != 0 92 #error TSCH_DEQUEUED_ARRAY_SIZE must be power of two 97 #define SYNC_IE_BOUND ((int32_t)US_TO_RTIMERTICKS(TSCH_DEFAULT_TS_RX_WAIT / 4)) 100 #if RTIMER_SECOND < (32 * 1024) 101 #error "TSCH: RTIMER_SECOND < (32 * 1024)" 103 #if CONTIKI_TARGET_COOJA 105 #define RTIMER_GUARD 0u 106 #elif RTIMER_SECOND >= 200000 107 #define RTIMER_GUARD (RTIMER_SECOND / 100000) 109 #define RTIMER_GUARD 2u 112 enum tsch_radio_state_on_cmd {
113 TSCH_RADIO_CMD_ON_START_OF_TIMESLOT,
114 TSCH_RADIO_CMD_ON_WITHIN_TIMESLOT,
115 TSCH_RADIO_CMD_ON_FORCE,
118 enum tsch_radio_state_off_cmd {
119 TSCH_RADIO_CMD_OFF_END_OF_TIMESLOT,
120 TSCH_RADIO_CMD_OFF_WITHIN_TIMESLOT,
121 TSCH_RADIO_CMD_OFF_FORCE,
126 struct ringbufindex dequeued_ringbuf;
127 struct tsch_packet *dequeued_array[TSCH_DEQUEUED_ARRAY_SIZE];
130 struct ringbufindex input_ringbuf;
131 struct input_packet input_array[TSCH_MAX_INCOMING_PACKETS];
135 clock_time_t last_sync_time;
138 static volatile int tsch_locked = 0;
140 static volatile int tsch_lock_requested = 0;
144 static int32_t drift_correction = 0;
146 static uint8_t is_drift_correction_used;
152 static rtimer_clock_t
volatile current_slot_start;
155 static volatile int tsch_in_slot_operation = 0;
158 uint8_t tsch_current_channel;
166 static struct tsch_link *backup_link = NULL;
171 static int burst_link_scheduled = 0;
173 int tsch_current_burst_count = 0;
180 static struct pt slot_operation_pt;
200 rtimer_clock_t busy_wait_time;
203 tsch_lock_requested = 1;
205 if(tsch_in_slot_operation) {
208 while(tsch_in_slot_operation) {
209 #if CONTIKI_TARGET_COOJA 210 simProcessRunValue = 1;
214 busy_wait_time =
RTIMER_NOW() - busy_wait_time;
219 tsch_lock_requested = 0;
223 snprintf(log->message,
sizeof(log->message),
224 "!get lock delay %u", (
unsigned)busy_wait_time);
231 snprintf(log->message,
sizeof(log->message),
251 uint16_t index_of_0 =
TSCH_ASN_MOD(*asn, tsch_hopping_sequence_length);
252 uint16_t index_of_offset = (index_of_0 + channel_offset) % tsch_hopping_sequence_length.val;
253 return tsch_hopping_sequence[index_of_offset];
262 check_timer_miss(rtimer_clock_t ref_time, rtimer_clock_t offset, rtimer_clock_t now)
264 rtimer_clock_t target = ref_time + offset;
265 int now_has_overflowed = now < ref_time;
266 int target_has_overflowed = target < ref_time;
268 if(now_has_overflowed == target_has_overflowed) {
270 return target <= now;
276 return now_has_overflowed;
284 tsch_schedule_slot_operation(
struct rtimer *tm, rtimer_clock_t ref_time, rtimer_clock_t offset,
const char *str)
290 int missed = check_timer_miss(ref_time, offset - RTIMER_GUARD, now);
294 snprintf(log->message,
sizeof(log->message),
296 str, (
int)(now-ref_time), (
int)offset);
299 r =
rtimer_set(tm, ref_time + offset, 1, (
void (*)(
struct rtimer *,
void *))tsch_slot_operation, NULL);
306 BUSYWAIT_UNTIL_ABS(0, ref_time, offset);
313 #define TSCH_SCHEDULE_AND_YIELD(pt, tm, ref_time, offset, str) \ 315 if(tsch_schedule_slot_operation(tm, ref_time, offset - RTIMER_GUARD, str)) { \ 317 BUSYWAIT_UNTIL_ABS(0, ref_time, offset); \ 329 if(link->link_options & LINK_OPTION_TX) {
331 if(link->link_type == LINK_TYPE_ADVERTISING || link->link_type == LINK_TYPE_ADVERTISING_ONLY) {
336 if(link->link_type != LINK_TYPE_ADVERTISING_ONLY) {
343 if(p == NULL && n == n_broadcast) {
350 if(target_neighbor != NULL) {
351 *target_neighbor = n;
369 case TSCH_RADIO_CMD_ON_START_OF_TIMESLOT:
370 if(TSCH_RADIO_ON_DURING_TIMESLOT) {
374 case TSCH_RADIO_CMD_ON_WITHIN_TIMESLOT:
375 if(!TSCH_RADIO_ON_DURING_TIMESLOT) {
379 case TSCH_RADIO_CMD_ON_FORCE:
400 case TSCH_RADIO_CMD_OFF_END_OF_TIMESLOT:
401 if(TSCH_RADIO_ON_DURING_TIMESLOT) {
405 case TSCH_RADIO_CMD_OFF_WITHIN_TIMESLOT:
406 if(!TSCH_RADIO_ON_DURING_TIMESLOT) {
410 case TSCH_RADIO_CMD_OFF_FORCE:
415 NETSTACK_RADIO.off();
434 static uint8_t mac_tx_status;
437 static int dequeued_index;
438 static int packet_ready = 1;
442 TSCH_DEBUG_TX_EVENT();
447 if(dequeued_index != -1) {
448 if(current_packet == NULL || current_packet->qb == NULL) {
449 mac_tx_status = MAC_TX_ERR_FATAL;
453 #if LLSEC802154_ENABLED 455 static uint8_t encrypted_packet[TSCH_PACKET_MAX_LEN];
458 static uint8_t packet_len;
460 static uint8_t seqno;
462 static uint8_t is_broadcast;
463 static rtimer_clock_t tx_start_time;
465 static int burst_link_requested;
468 static uint8_t cca_status;
472 packet = queuebuf_dataptr(current_packet->qb);
473 packet_len = queuebuf_datalen(current_packet->qb);
475 is_broadcast = current_neighbor->is_broadcast;
477 burst_link_requested = 0;
479 && tsch_current_burst_count + 1 < TSCH_BURST_MAX_LEN
481 burst_link_requested = 1;
485 seqno = ((uint8_t *)(packet))[2];
487 if(current_neighbor == n_eb) {
493 #if LLSEC802154_ENABLED 494 if(tsch_is_pan_secured) {
497 int with_encryption = queuebuf_attr(current_packet->qb, PACKETBUF_ATTR_SECURITY_LEVEL) & 0x4;
499 packet_len - current_packet->header_len, &tsch_current_asn);
500 if(with_encryption) {
501 packet = encrypted_packet;
507 if(packet_ready && NETSTACK_RADIO.prepare(packet, packet_len) == 0) {
508 static rtimer_clock_t tx_duration;
513 TSCH_SCHEDULE_AND_YIELD(pt, t, current_slot_start, TS_CCA_OFFSET,
"cca");
514 TSCH_DEBUG_TX_EVENT();
517 BUSYWAIT_UNTIL_ABS(!(cca_status |= NETSTACK_RADIO.channel_clear()),
518 current_slot_start, TS_CCA_OFFSET + TS_CCA);
519 TSCH_DEBUG_TX_EVENT();
522 if(cca_status == 0) {
528 TSCH_SCHEDULE_AND_YIELD(pt, t, current_slot_start, tsch_timing[tsch_ts_tx_offset] - RADIO_DELAY_BEFORE_TX,
"TxBeforeTx");
529 TSCH_DEBUG_TX_EVENT();
531 mac_tx_status = NETSTACK_RADIO.transmit(packet_len);
534 tx_start_time = current_slot_start + tsch_timing[tsch_ts_tx_offset];
536 tx_duration = TSCH_PACKET_DURATION(packet_len);
538 tx_duration = MIN(tx_duration, tsch_timing[tsch_ts_max_tx]);
542 if(mac_tx_status == RADIO_TX_OK) {
544 uint8_t ackbuf[TSCH_PACKET_MAX_LEN];
546 rtimer_clock_t ack_start_time;
548 struct ieee802154_ies ack_ies;
552 #if TSCH_HW_FRAME_FILTERING 555 NETSTACK_RADIO.get_value(RADIO_PARAM_RX_MODE, &radio_rx_mode);
559 TSCH_SCHEDULE_AND_YIELD(pt, t, current_slot_start,
560 tsch_timing[tsch_ts_tx_offset] + tx_duration + tsch_timing[tsch_ts_rx_ack_delay] - RADIO_DELAY_BEFORE_RX,
"TxBeforeAck");
561 TSCH_DEBUG_TX_EVENT();
564 BUSYWAIT_UNTIL_ABS(NETSTACK_RADIO.receiving_packet(),
565 tx_start_time, tx_duration + tsch_timing[tsch_ts_rx_ack_delay] + tsch_timing[tsch_ts_ack_wait] + RADIO_DELAY_BEFORE_DETECT);
566 TSCH_DEBUG_TX_EVENT();
568 ack_start_time =
RTIMER_NOW() - RADIO_DELAY_BEFORE_DETECT;
571 BUSYWAIT_UNTIL_ABS(!NETSTACK_RADIO.receiving_packet(),
572 ack_start_time, tsch_timing[tsch_ts_max_ack]);
573 TSCH_DEBUG_TX_EVENT();
576 #if TSCH_HW_FRAME_FILTERING 578 NETSTACK_RADIO.get_value(RADIO_PARAM_RX_MODE, &radio_rx_mode);
583 ack_len = NETSTACK_RADIO.read((
void *)ackbuf,
sizeof(ackbuf));
588 is_time_source = current_neighbor != NULL && current_neighbor->is_time_source;
590 &frame, &ack_ies, &ack_hdrlen) == 0) {
594 #if LLSEC802154_ENABLED 597 &frame, ¤t_neighbor->addr, &tsch_current_asn)) {
599 snprintf(log->message,
sizeof(log->message),
600 "!failed to authenticate ACK"));
605 snprintf(log->message,
sizeof(log->message),
606 "!failed to parse ACK"));
613 int32_t eack_time_correction = US_TO_RTIMERTICKS(ack_ies.ie_time_correction);
614 int32_t since_last_timesync =
TSCH_ASN_DIFF(tsch_current_asn, last_sync_asn);
615 if(eack_time_correction > SYNC_IE_BOUND) {
616 drift_correction = SYNC_IE_BOUND;
617 }
else if(eack_time_correction < -SYNC_IE_BOUND) {
618 drift_correction = -SYNC_IE_BOUND;
620 drift_correction = eack_time_correction;
622 if(drift_correction != eack_time_correction) {
624 snprintf(log->message,
sizeof(log->message),
625 "!truncated dr %d %d", (
int)eack_time_correction, (
int)drift_correction);
628 is_drift_correction_used = 1;
631 last_sync_asn = tsch_current_asn;
639 if(burst_link_requested) {
640 burst_link_scheduled = 1;
657 current_packet->transmissions++;
658 current_packet->ret = mac_tx_status;
665 dequeued_array[dequeued_index] = current_packet;
671 log->tx.mac_tx_status = mac_tx_status;
672 log->tx.num_tx = current_packet->transmissions;
673 log->tx.datalen = queuebuf_datalen(current_packet->qb);
674 log->tx.drift = drift_correction;
675 log->tx.drift_used = is_drift_correction_used;
676 log->tx.is_data = ((((uint8_t *)(queuebuf_dataptr(current_packet->qb)))[0]) & 7) == FRAME802154_DATAFRAME;
677 #
if LLSEC802154_ENABLED
678 log->tx.sec_level = queuebuf_attr(current_packet->qb, PACKETBUF_ATTR_SECURITY_LEVEL);
680 log->tx.sec_level = 0;
682 linkaddr_copy(&log->tx.dest, queuebuf_addr(current_packet->qb, PACKETBUF_ADDR_RECEIVER));
683 log->tx.seqno = queuebuf_attr(current_packet->qb, PACKETBUF_ATTR_MAC_SEQNO);
690 TSCH_DEBUG_TX_EVENT();
708 static linkaddr_t source_address;
709 static linkaddr_t destination_address;
710 static int16_t input_index;
711 static int input_queue_drop = 0;
715 TSCH_DEBUG_RX_EVENT();
718 if(input_index == -1) {
723 static int32_t estimated_drift;
725 static rtimer_clock_t rx_start_time;
726 static rtimer_clock_t expected_rx_time;
727 static rtimer_clock_t packet_duration;
730 expected_rx_time = current_slot_start + tsch_timing[tsch_ts_tx_offset];
732 rx_start_time = expected_rx_time;
734 current_input = &input_array[input_index];
737 TSCH_SCHEDULE_AND_YIELD(pt, t, current_slot_start, tsch_timing[tsch_ts_rx_offset] - RADIO_DELAY_BEFORE_RX,
"RxBeforeListen");
738 TSCH_DEBUG_RX_EVENT();
742 packet_seen = NETSTACK_RADIO.receiving_packet() || NETSTACK_RADIO.pending_packet();
745 BUSYWAIT_UNTIL_ABS((packet_seen = NETSTACK_RADIO.receiving_packet()),
746 current_slot_start, tsch_timing[tsch_ts_rx_offset] + tsch_timing[tsch_ts_rx_wait] + RADIO_DELAY_BEFORE_DETECT);
752 TSCH_DEBUG_RX_EVENT();
754 rx_start_time =
RTIMER_NOW() - RADIO_DELAY_BEFORE_DETECT;
757 BUSYWAIT_UNTIL_ABS(!NETSTACK_RADIO.receiving_packet(),
758 current_slot_start, tsch_timing[tsch_ts_rx_offset] + tsch_timing[tsch_ts_rx_wait] + tsch_timing[tsch_ts_max_tx]);
759 TSCH_DEBUG_RX_EVENT();
762 if(NETSTACK_RADIO.pending_packet()) {
763 static int frame_valid;
764 static int header_len;
769 current_input->len = NETSTACK_RADIO.read((
void *)current_input->payload, TSCH_PACKET_MAX_LEN);
770 NETSTACK_RADIO.get_value(RADIO_PARAM_LAST_RSSI, &radio_last_rssi);
771 current_input->rx_asn = tsch_current_asn;
772 current_input->rssi = (signed)radio_last_rssi;
773 current_input->channel = tsch_current_channel;
774 header_len =
frame802154_parse((uint8_t *)current_input->payload, current_input->len, &frame);
775 frame_valid = header_len > 0 &&
776 frame802154_check_dest_panid(&frame) &&
777 frame802154_extract_linkaddr(&frame, &source_address, &destination_address);
779 #if TSCH_RESYNC_WITH_SFD_TIMESTAMPS 781 NETSTACK_RADIO.get_object(RADIO_PARAM_LAST_PACKET_TIMESTAMP, &rx_start_time,
sizeof(rtimer_clock_t));
784 packet_duration = TSCH_PACKET_DURATION(current_input->len);
788 snprintf(log->message,
sizeof(log->message),
789 "!failed to parse frame %u %u", header_len, current_input->len));
796 snprintf(log->message,
sizeof(log->message),
797 "!discarding frame with type %u, len %u", frame.
fcf.
frame_type, current_input->len));
802 #if LLSEC802154_ENABLED 807 &frame, &source_address, &tsch_current_asn)) {
811 snprintf(log->message,
sizeof(log->message),
812 "!failed to authenticate frame %u", current_input->len));
823 estimated_drift = RTIMER_CLOCK_DIFF(expected_rx_time, rx_start_time);
825 #if TSCH_TIMESYNC_REMOVE_JITTER 827 if(ABS(estimated_drift) <= TSCH_TIMESYNC_MEASUREMENT_ERROR) {
829 }
else if(estimated_drift > 0) {
830 estimated_drift -= TSCH_TIMESYNC_MEASUREMENT_ERROR;
832 estimated_drift += TSCH_TIMESYNC_MEASUREMENT_ERROR;
836 #ifdef TSCH_CALLBACK_DO_NACK 838 do_nack = TSCH_CALLBACK_DO_NACK(current_link,
839 &source_address, &destination_address);
844 static uint8_t ack_buf[TSCH_PACKET_MAX_LEN];
849 &source_address, frame.
seq, (int16_t)RTIMERTICKS_TO_US(estimated_drift), do_nack);
852 #if LLSEC802154_ENABLED 853 if(tsch_is_pan_secured) {
860 NETSTACK_RADIO.prepare((
const void *)ack_buf, ack_len);
863 TSCH_SCHEDULE_AND_YIELD(pt, t, rx_start_time,
864 packet_duration + tsch_timing[tsch_ts_tx_ack_delay] - RADIO_DELAY_BEFORE_TX,
"RxBeforeAck");
865 TSCH_DEBUG_RX_EVENT();
866 NETSTACK_RADIO.transmit(ack_len);
876 if(n != NULL && n->is_time_source) {
877 int32_t since_last_timesync =
TSCH_ASN_DIFF(tsch_current_asn, last_sync_asn);
879 last_sync_asn = tsch_current_asn;
882 drift_correction = -estimated_drift;
883 is_drift_correction_used = 1;
896 log->rx.datalen = current_input->len;
897 log->rx.drift = drift_correction;
898 log->rx.drift_used = is_drift_correction_used;
899 log->rx.is_data = frame.
fcf.
frame_type == FRAME802154_DATAFRAME;
901 log->rx.estimated_drift = estimated_drift;
902 log->rx.seqno = frame.
seq;
914 if(input_queue_drop != 0) {
916 snprintf(log->message,
sizeof(log->message),
917 "!queue full skipped %u", input_queue_drop);
919 input_queue_drop = 0;
923 TSCH_DEBUG_RX_EVENT();
933 TSCH_DEBUG_INTERRUPT();
937 while(tsch_is_associated) {
939 if(current_link == NULL || tsch_lock_requested) {
943 snprintf(log->message,
sizeof(log->message),
944 "!skipped slot %u %u %u",
947 current_link == NULL);
952 TSCH_DEBUG_SLOT_START();
953 tsch_in_slot_operation = 1;
955 drift_correction = 0;
956 is_drift_correction_used = 0;
958 current_packet = get_packet_and_neighbor_for_link(current_link, ¤t_neighbor);
961 if(current_packet == NULL && !(current_link->link_options & LINK_OPTION_RX) && backup_link != NULL) {
962 current_link = backup_link;
963 current_packet = get_packet_and_neighbor_for_link(current_link, ¤t_neighbor);
965 is_active_slot = current_packet != NULL || (current_link->link_options & LINK_OPTION_RX);
969 if(burst_link_scheduled) {
971 burst_link_scheduled = 0;
976 NETSTACK_RADIO.set_value(RADIO_PARAM_CHANNEL, tsch_current_channel);
981 if(current_packet != NULL) {
987 static struct pt slot_tx_pt;
988 PT_SPAWN(&slot_operation_pt, &slot_tx_pt, tsch_tx_slot(&slot_tx_pt, t));
991 static struct pt slot_rx_pt;
992 PT_SPAWN(&slot_operation_pt, &slot_rx_pt, tsch_rx_slot(&slot_rx_pt, t));
997 burst_link_scheduled = 0;
999 TSCH_DEBUG_SLOT_END();
1005 if(!tsch_is_coordinator && (
TSCH_ASN_DIFF(tsch_current_asn, last_sync_asn) >
1006 (100 * TSCH_CLOCK_TO_SLOTS(TSCH_DESYNC_THRESHOLD / 100, tsch_timing[tsch_ts_timeslot_length])))) {
1008 snprintf(log->message,
sizeof(log->message),
1009 "! leaving the network, last sync %u",
1012 last_timesource_neighbor = NULL;
1017 uint16_t timeslot_diff = 0;
1018 rtimer_clock_t prev_slot_start;
1020 rtimer_clock_t time_to_next_active_slot;
1023 if(current_link != NULL
1024 && current_link->link_options & LINK_OPTION_TX
1025 && current_link->link_options & LINK_OPTION_SHARED) {
1033 if(burst_link_scheduled) {
1037 tsch_current_burst_count++;
1041 if(current_link == NULL) {
1048 tsch_current_burst_count = 0;
1055 time_to_next_active_slot = timeslot_diff * tsch_timing[tsch_ts_timeslot_length] + drift_correction;
1057 drift_correction = 0;
1058 is_drift_correction_used = 0;
1060 prev_slot_start = current_slot_start;
1061 current_slot_start += time_to_next_active_slot;
1062 }
while(!tsch_schedule_slot_operation(t, prev_slot_start, time_to_next_active_slot,
"main"));
1065 tsch_in_slot_operation = 0;
1069 PT_END(&slot_operation_pt);
1077 static struct rtimer slot_operation_timer;
1078 rtimer_clock_t time_to_next_active_slot;
1079 rtimer_clock_t prev_slot_start;
1082 uint16_t timeslot_diff;
1085 if(current_link == NULL) {
1093 time_to_next_active_slot = timeslot_diff * tsch_timing[tsch_ts_timeslot_length];
1095 prev_slot_start = current_slot_start;
1096 current_slot_start += time_to_next_active_slot;
1097 }
while(!tsch_schedule_slot_operation(&slot_operation_timer, prev_slot_start, time_to_next_active_slot,
"assoc"));
1105 current_slot_start = next_slot_start;
1106 tsch_current_asn = *next_slot_asn;
1107 last_sync_asn = tsch_current_asn;
1109 current_link = NULL;
#define TSCH_LOG_ADD(log_type, init_code)
Use this macro to add a log to the queue (will be printed out later, after leaving interrupt context)...
frame802154_scf_t security_control
Security control bitfield.
struct tsch_neighbor * tsch_queue_get_nbr(const linkaddr_t *addr)
Get a TSCH neighbor.
static void tsch_radio_off(enum tsch_radio_state_off_cmd command)
This function turns off the radio.
int rtimer_set(struct rtimer *rtimer, rtimer_clock_t time, rtimer_clock_t duration, rtimer_callback_t func, void *ptr)
Post a real-time task.
The MAC layer did not get an acknowledgement for the packet.
frame802154_fcf_t fcf
Frame control field.
Representation of a real-time task.
struct tsch_neighbor * last_timesource_neighbor
The neighbor last used as our time source.
int tsch_get_lock(void)
Takes the TSCH lock.
Header file for the radio API
uint8_t security_level
3 bit.
void tsch_release_lock(void)
Releases the TSCH lock.
int frame802154_parse(uint8_t *data, int len, frame802154_t *pf)
Parses an input frame.
TSCH neighbor information.
void tsch_queue_update_all_backoff_windows(const linkaddr_t *dest_addr)
Decrement backoff window for the queue(s) able to Tx to a given address.
unsigned int tsch_security_parse_frame(const uint8_t *hdr, int hdrlen, int datalen, const frame802154_t *frame, const linkaddr_t *sender, struct tsch_asn_t *asn)
Parse and check a frame protected with encryption and/or MIC.
#define PT_BEGIN(pt)
Declare the start of a protothread inside the C function implementing the protothread.
void tsch_timesync_update(struct tsch_neighbor *n, uint16_t time_delta_asn, int32_t drift_correction)
Updates timesync information for a given neighbor.
int radio_value_t
Each radio has a set of parameters that designate the current configuration and state of the radio...
uint8_t src_addr[8]
Source address.
void tsch_schedule_keepalive(void)
Schedule a keep-alive transmission within [timeout*0.9, timeout[.
A MAC framer for IEEE 802.15.4
const linkaddr_t linkaddr_null
The null link-layer address.
#define PT_SPAWN(pt, child, thread)
Spawn a child protothread and wait until it exits.
The MAC layer transmission was OK.
int tsch_packet_update_eb(uint8_t *buf, int buf_size, uint8_t tsch_sync_ie_offset)
Update ASN in EB packet.
linkaddr_t linkaddr_node_addr
The link-layer address of the node.
uint8_t tsch_calculate_channel(struct tsch_asn_t *asn, uint8_t channel_offset)
Returns a 802.15.4 channel from an ASN and channel offset.
#define RTIMER_NOW()
Get the current clock time.
int32_t tsch_timesync_adaptive_compensate(rtimer_clock_t delta_ticks)
Computes time compensation for a given point in the future.
unsigned int tsch_security_mic_len(const frame802154_t *frame)
Return MIC length.
#define PT_END(pt)
Declare the end of a protothread.
Header file for the Packet queue buffer management
void process_poll(struct process *p)
Request a process to be polled.
struct tsch_link * tsch_schedule_get_next_active_link(struct tsch_asn_t *asn, uint16_t *time_offset, struct tsch_link **backup_link)
Returns the next active link after a given ASN, and a backup link (for the same ASN, with Rx flag)
#define TSCH_ASN_MOD(asn, div)
Returns the result (16 bits) of a modulo operation on ASN, with divisor being a struct asn_divisor_t...
#define PT_YIELD(pt)
Yield from the current protothread.
int tsch_packet_parse_eack(const uint8_t *buf, int buf_size, uint8_t seqno, frame802154_t *frame, struct ieee802154_ies *ies, uint8_t *hdr_len)
Parse enhanced ACK packet.
Main API declarations for TSCH.
clock_time_t clock_time(void)
Get the current clock time.
The MAC layer transmission could not be performed because of a fatal error.
struct tsch_packet * tsch_queue_get_packet_for_nbr(const struct tsch_neighbor *n, struct tsch_link *link)
Returns the first packet that can be sent from a queue on a given link.
#define RADIO_RX_MODE_ADDRESS_FILTER
The radio reception mode controls address filtering and automatic transmission of acknowledgements in...
int tsch_is_locked(void)
Checks if the TSCH lock is set.
void tsch_slot_operation_sync(rtimer_clock_t next_slot_start, struct tsch_asn_t *next_slot_asn)
Set global time before starting slot operation, with a rtimer time and an ASN.
Parameters used by the frame802154_create() function.
void linkaddr_copy(linkaddr_t *dest, const linkaddr_t *src)
Copy a link-layer address.
#define PT_THREAD(name_args)
Declaration of a protothread.
void tsch_packet_set_frame_pending(uint8_t *buf, int buf_size)
Set frame pending bit in a packet (whose header was already build)
int tsch_queue_packet_sent(struct tsch_neighbor *n, struct tsch_packet *p, struct tsch_link *link, uint8_t mac_tx_status)
Updates neighbor queue state after a transmission.
#define TSCH_ASN_DIFF(asn1, asn2)
Returns the 32-bit diff between asn1 and asn2.
int linkaddr_cmp(const linkaddr_t *addr1, const linkaddr_t *addr2)
Compare two link-layer addresses.
static void tsch_radio_on(enum tsch_radio_state_on_cmd command)
This function turns on the radio.
int tsch_queue_packet_count(const linkaddr_t *addr)
Returns the number of packets currently a given neighbor queue.
#define TSCH_ASN_INC(asn, inc)
Increment an ASN by inc (32 bits)
uint8_t seq
Sequence number.
int tsch_packet_get_frame_pending(uint8_t *buf, int buf_size)
Get frame pending bit from a packet.
int ringbufindex_peek_put(const struct ringbufindex *r)
Check if there is space to put an element.
void tsch_disassociate(void)
Leave the TSCH network we are currently in.
An IEEE 802.15.4-2015 TSCH link (also called cell or slot)
Header file for the Packet buffer (packetbuf) management
Include file for the Contiki low-layer network stack (NETSTACK)
struct tsch_packet * tsch_queue_get_unicast_packet_for_any(struct tsch_neighbor **n, struct tsch_link *link)
Gets the head packet of any neighbor queue with zero backoff counter.
unsigned int tsch_security_secure_frame(uint8_t *hdr, uint8_t *outbuf, int hdrlen, int datalen, struct tsch_asn_t *asn)
Protect a frame with encryption and/or MIC.
Header file for the logging system
The MAC layer deferred the transmission for a later time.
uint8_t ack_required
1 bit.
int ringbufindex_put(struct ringbufindex *r)
Put one element to the ring buffer.
void tsch_slot_operation_start(void)
Start actual slot operation.
The ASN is an absolute slot number over 5 bytes.
frame802154_aux_hdr_t aux_hdr
Aux security header.
int tsch_packet_create_eack(uint8_t *buf, uint16_t buf_len, const linkaddr_t *dest_addr, uint8_t seqno, int16_t drift, int nack)
Construct Enhanced ACK packet.