/* Check if a packet is for us */
static int
is_packet_for_us(uint8_t *buf, int len, int do_send_ack)
{
frame802154_t frame;
int result;
uint8_t parsed = frame802154_parse(buf, len, &frame);
if(parsed) {
if(frame.fcf.dest_addr_mode) {
int has_dest_panid;
frame802154_has_panid(&frame.fcf, NULL, &has_dest_panid);
if(has_dest_panid
&& frame802154_get_pan_id() != FRAME802154_BROADCASTPANDID
&& frame.dest_pid != frame802154_get_pan_id()
&& frame.dest_pid != FRAME802154_BROADCASTPANDID) {
/* Packet to another PAN */
return 0;
}
if(!is_broadcast_addr(frame.fcf.dest_addr_mode, frame.dest_addr)) {
result = linkaddr_cmp((linkaddr_t *)frame.dest_addr, &linkaddr_node_addr);
if(autoack_enabled && result && do_send_ack) {
/* this is a unicast frame and sending ACKs is enabled */
send_ack(&frame);
}
return result;
}
}
return 1;
} else {
return 0;
}
}
/*---------------------------------------------------------------------------*/
static int
parse(void)
{
frame802154_t frame;
int hdr_len;
hdr_len = frame802154_parse(packetbuf_dataptr(), packetbuf_datalen(), &frame);
if(hdr_len && packetbuf_hdrreduce(hdr_len)) {
packetbuf_set_attr(PACKETBUF_ATTR_FRAME_TYPE, frame.fcf.frame_type);
if(frame.fcf.dest_addr_mode) {
if(frame.dest_pid != frame802154_get_pan_id() &&
frame.dest_pid != FRAME802154_BROADCASTPANDID) {
/* Packet to another PAN */
PRINTF("15.4: for another pan %u\n", frame.dest_pid);
return FRAMER_FAILED;
}
if(!frame802154_is_broadcast_addr(frame.fcf.dest_addr_mode, frame.dest_addr)) {
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, (linkaddr_t *)&frame.dest_addr);
}
}
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, (linkaddr_t *)&frame.src_addr);
packetbuf_set_attr(PACKETBUF_ATTR_PENDING, frame.fcf.frame_pending);
if(frame.fcf.sequence_number_suppression == 0) {
packetbuf_set_attr(PACKETBUF_ATTR_MAC_SEQNO, frame.seq);
} else {
packetbuf_set_attr(PACKETBUF_ATTR_MAC_SEQNO, 0xffff);
}
#if NETSTACK_CONF_WITH_RIME
packetbuf_set_attr(PACKETBUF_ATTR_PACKET_ID, frame.seq);
#endif
#if LLSEC802154_USES_AUX_HEADER
if(frame.fcf.security_enabled) {
packetbuf_set_attr(PACKETBUF_ATTR_SECURITY_LEVEL, frame.aux_hdr.security_control.security_level);
#if LLSEC802154_USES_FRAME_COUNTER
packetbuf_set_attr(PACKETBUF_ATTR_FRAME_COUNTER_BYTES_0_1, frame.aux_hdr.frame_counter.u16[0]);
packetbuf_set_attr(PACKETBUF_ATTR_FRAME_COUNTER_BYTES_2_3, frame.aux_hdr.frame_counter.u16[1]);
#endif /* LLSEC802154_USES_FRAME_COUNTER */
#if LLSEC802154_USES_EXPLICIT_KEYS
packetbuf_set_attr(PACKETBUF_ATTR_KEY_ID_MODE, frame.aux_hdr.security_control.key_id_mode);
packetbuf_set_attr(PACKETBUF_ATTR_KEY_INDEX, frame.aux_hdr.key_index);
packetbuf_set_attr(PACKETBUF_ATTR_KEY_SOURCE_BYTES_0_1, frame.aux_hdr.key_source.u16[0]);
#endif /* LLSEC802154_USES_EXPLICIT_KEYS */
}
#endif /* LLSEC802154_USES_AUX_HEADER */
PRINTF("15.4-IN: %2X", frame.fcf.frame_type);
PRINTADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER));
PRINTADDR(packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
PRINTF("%d %u (%u)\n", hdr_len, packetbuf_datalen(), packetbuf_totlen());
return hdr_len;
}
return FRAMER_FAILED;
}
/* Setup TSCH as a coordinator */
static void
tsch_start_coordinator(void)
{
frame802154_set_pan_id(IEEE802154_PANID);
/* Initialize hopping sequence as default */
memcpy(tsch_hopping_sequence, TSCH_DEFAULT_HOPPING_SEQUENCE, sizeof(TSCH_DEFAULT_HOPPING_SEQUENCE));
ASN_DIVISOR_INIT(tsch_hopping_sequence_length, sizeof(TSCH_DEFAULT_HOPPING_SEQUENCE));
#if TSCH_SCHEDULE_WITH_6TISCH_MINIMAL
tsch_schedule_create_minimal();
#endif
tsch_is_associated = 1;
tsch_join_priority = 0;
PRINTF("TSCH: starting as coordinator, PAN ID %x, asn-%x.%lx\n",
frame802154_get_pan_id(), current_asn.ms1b, current_asn.ls4b);
/* Start slot operation */
tsch_slot_operation_sync(RTIMER_NOW(), ¤t_asn);
}
/*---------------------------------------------------------------------------*/
static int
create_frame(int type, int do_create)
{
frame802154_t params;
int hdr_len;
if(frame802154_get_pan_id() == 0xffff) {
return -1;
}
/* init to zeros */
memset(¶ms, 0, sizeof(params));
if(!initialized) {
initialized = 1;
mac_dsn = random_rand() & 0xff;
}
/* Build the FCF. */
params.fcf.frame_type = packetbuf_attr(PACKETBUF_ATTR_FRAME_TYPE);
params.fcf.frame_pending = packetbuf_attr(PACKETBUF_ATTR_PENDING);
if(packetbuf_holds_broadcast()) {
params.fcf.ack_required = 0;
} else {
params.fcf.ack_required = packetbuf_attr(PACKETBUF_ATTR_MAC_ACK);
}
/* We do not compress PAN ID in outgoing frames, i.e. include one PAN ID (dest by default)
* There is one exception, seemingly a typo in Table 2a: rows 2 and 3: when there is no
* source nor destination address, we have dest PAN ID iff compression is *set*. */
params.fcf.panid_compression = 0;
params.fcf.sequence_number_suppression = FRAME802154_SUPPR_SEQNO;
/* Insert IEEE 802.15.4 version bits. */
params.fcf.frame_version = FRAME802154_VERSION;
#if LLSEC802154_USES_AUX_HEADER
if(packetbuf_attr(PACKETBUF_ATTR_SECURITY_LEVEL)) {
params.fcf.security_enabled = 1;
}
/* Setting security-related attributes */
params.aux_hdr.security_control.security_level = packetbuf_attr(PACKETBUF_ATTR_SECURITY_LEVEL);
#if LLSEC802154_USES_FRAME_COUNTER
params.aux_hdr.frame_counter.u16[0] = packetbuf_attr(PACKETBUF_ATTR_FRAME_COUNTER_BYTES_0_1);
params.aux_hdr.frame_counter.u16[1] = packetbuf_attr(PACKETBUF_ATTR_FRAME_COUNTER_BYTES_2_3);
#else /* LLSEC802154_USES_FRAME_COUNTER */
params.aux_hdr.security_control.frame_counter_suppression = 1;
params.aux_hdr.security_control.frame_counter_size = 1;
#endif /* LLSEC802154_USES_FRAME_COUNTER */
#if LLSEC802154_USES_EXPLICIT_KEYS
params.aux_hdr.security_control.key_id_mode = packetbuf_attr(PACKETBUF_ATTR_KEY_ID_MODE);
params.aux_hdr.key_index = packetbuf_attr(PACKETBUF_ATTR_KEY_INDEX);
params.aux_hdr.key_source.u16[0] = packetbuf_attr(PACKETBUF_ATTR_KEY_SOURCE_BYTES_0_1);
#endif /* LLSEC802154_USES_EXPLICIT_KEYS */
#endif /* LLSEC802154_USES_AUX_HEADER */
/* Increment and set the data sequence number. */
if(!do_create) {
/* Only length calculation - no sequence number is needed and
should not be consumed. */
} else if(packetbuf_attr(PACKETBUF_ATTR_MAC_SEQNO)) {
params.seq = packetbuf_attr(PACKETBUF_ATTR_MAC_SEQNO);
} else {
/* Ensure that the sequence number 0 is not used as it would bypass the above check. */
if(mac_dsn == 0) {
mac_dsn++;
}
params.seq = mac_dsn++;
packetbuf_set_attr(PACKETBUF_ATTR_MAC_SEQNO, params.seq);
}
/* Complete the addressing fields. */
/**
\todo For phase 1 the addresses are all long. We'll need a mechanism
in the rime attributes to tell the mac to use long or short for phase 2.
*/
if(LINKADDR_SIZE == 2) {
/* Use short address mode if linkaddr size is short. */
params.fcf.src_addr_mode = FRAME802154_SHORTADDRMODE;
} else {
params.fcf.src_addr_mode = FRAME802154_LONGADDRMODE;
}
params.dest_pid = frame802154_get_pan_id();
if(packetbuf_holds_broadcast()) {
/* Broadcast requires short address mode. */
params.fcf.dest_addr_mode = FRAME802154_SHORTADDRMODE;
params.dest_addr[0] = 0xFF;
params.dest_addr[1] = 0xFF;
} else {
linkaddr_copy((linkaddr_t *)¶ms.dest_addr,
packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
/* Use short address mode if linkaddr size is small */
if(LINKADDR_SIZE == 2) {
params.fcf.dest_addr_mode = FRAME802154_SHORTADDRMODE;
} else {
params.fcf.dest_addr_mode = FRAME802154_LONGADDRMODE;
}
}
/* Set the source PAN ID to the global variable. */
params.src_pid = frame802154_get_pan_id();
/*
* Set up the source address using only the long address mode for
* phase 1.
*/
linkaddr_copy((linkaddr_t *)¶ms.src_addr, &linkaddr_node_addr);
params.payload = packetbuf_dataptr();
params.payload_len = packetbuf_datalen();
hdr_len = frame802154_hdrlen(¶ms);
if(!do_create) {
/* Only calculate header length */
return hdr_len;
} else if(packetbuf_hdralloc(hdr_len)) {
frame802154_create(¶ms, packetbuf_hdrptr());
PRINTF("15.4-OUT: %2X", params.fcf.frame_type);
PRINTADDR(params.dest_addr);
PRINTF("%d %u (%u)\n", hdr_len, packetbuf_datalen(), packetbuf_totlen());
return hdr_len;
} else {
PRINTF("15.4-OUT: too large header: %u\n", hdr_len);
return FRAMER_FAILED;
}
}
/* Create an EB packet */
int
tsch_packet_create_eb(uint8_t *buf, int buf_size, uint8_t seqno,
uint8_t *hdr_len, uint8_t *tsch_sync_ie_offset)
{
int ret = 0;
uint8_t curr_len = 0;
uint8_t mlme_ie_offset;
frame802154_t p;
struct ieee802154_ies ies;
if(buf_size < TSCH_PACKET_MAX_LEN) {
return 0;
}
/* Create 802.15.4 header */
memset(&p, 0, sizeof(p));
p.fcf.frame_type = FRAME802154_BEACONFRAME;
p.fcf.ie_list_present = 1;
p.fcf.frame_version = FRAME802154_IEEE802154E_2012;
p.fcf.src_addr_mode = LINKADDR_SIZE > 2 ? FRAME802154_LONGADDRMODE : FRAME802154_SHORTADDRMODE;
p.fcf.dest_addr_mode = FRAME802154_SHORTADDRMODE;
p.seq = seqno;
p.fcf.sequence_number_suppression = FRAME802154_SUPPR_SEQNO;
/* It is important not to compress PAN ID, as this would result in not including either
* source nor destination PAN ID, leaving potential joining devices unaware of the PAN ID. */
p.fcf.panid_compression = 0;
p.src_pid = frame802154_get_pan_id();
p.dest_pid = frame802154_get_pan_id();
linkaddr_copy((linkaddr_t *)&p.src_addr, &linkaddr_node_addr);
p.dest_addr[0] = 0xff;
p.dest_addr[1] = 0xff;
#if LLSEC802154_ENABLED
if(tsch_is_pan_secured) {
p.fcf.security_enabled = packetbuf_attr(PACKETBUF_ATTR_SECURITY_LEVEL) > 0;
p.aux_hdr.security_control.security_level = packetbuf_attr(PACKETBUF_ATTR_SECURITY_LEVEL);
p.aux_hdr.security_control.key_id_mode = packetbuf_attr(PACKETBUF_ATTR_KEY_ID_MODE);
p.aux_hdr.security_control.frame_counter_suppression = 1;
p.aux_hdr.security_control.frame_counter_size = 1;
p.aux_hdr.key_index = packetbuf_attr(PACKETBUF_ATTR_KEY_INDEX);
}
#endif /* LLSEC802154_ENABLED */
if((curr_len = frame802154_create(&p, buf)) == 0) {
return 0;
}
/* Prepare Information Elements for inclusion in the EB */
memset(&ies, 0, sizeof(ies));
/* Add TSCH timeslot timing IE. */
#if TSCH_PACKET_EB_WITH_TIMESLOT_TIMING
{
int i;
ies.ie_tsch_timeslot_id = 1;
for(i = 0; i < tsch_ts_elements_count; i++) {
ies.ie_tsch_timeslot[i] = RTIMERTICKS_TO_US(tsch_timing[i]);
}
}
#endif /* TSCH_PACKET_EB_WITH_TIMESLOT_TIMING */
/* Add TSCH hopping sequence IE */
#if TSCH_PACKET_EB_WITH_HOPPING_SEQUENCE
if(tsch_hopping_sequence_length.val <= sizeof(ies.ie_hopping_sequence_list)) {
ies.ie_channel_hopping_sequence_id = 1;
ies.ie_hopping_sequence_len = tsch_hopping_sequence_length.val;
memcpy(ies.ie_hopping_sequence_list, tsch_hopping_sequence, ies.ie_hopping_sequence_len);
}
#endif /* TSCH_PACKET_EB_WITH_HOPPING_SEQUENCE */
/* Add Slotframe and Link IE */
#if TSCH_PACKET_EB_WITH_SLOTFRAME_AND_LINK
{
/* Send slotframe 0 with link at timeslot 0 */
struct tsch_slotframe *sf0 = tsch_schedule_get_slotframe_by_handle(0);
struct tsch_link *link0 = tsch_schedule_get_link_by_timeslot(sf0, 0);
if(sf0 && link0) {
ies.ie_tsch_slotframe_and_link.num_slotframes = 1;
ies.ie_tsch_slotframe_and_link.slotframe_handle = sf0->handle;
ies.ie_tsch_slotframe_and_link.slotframe_size = sf0->size.val;
ies.ie_tsch_slotframe_and_link.num_links = 1;
ies.ie_tsch_slotframe_and_link.links[0].timeslot = link0->timeslot;
ies.ie_tsch_slotframe_and_link.links[0].channel_offset = link0->channel_offset;
ies.ie_tsch_slotframe_and_link.links[0].link_options = link0->link_options;
}
}
#endif /* TSCH_PACKET_EB_WITH_SLOTFRAME_AND_LINK */
/* First add header-IE termination IE to stipulate that next come payload IEs */
if((ret = frame80215e_create_ie_header_list_termination_1(buf + curr_len, buf_size - curr_len, &ies)) == -1) {
return -1;
}
curr_len += ret;
/* We start payload IEs, save offset */
if(hdr_len != NULL) {
*hdr_len = curr_len;
}
/* Save offset of the MLME IE descriptor, we need to know the total length
* before writing it */
mlme_ie_offset = curr_len;
curr_len += 2; /* Space needed for MLME descriptor */
/* Save the offset of the TSCH Synchronization IE, needed to update ASN and join priority before sending */
if(tsch_sync_ie_offset != NULL) {
*tsch_sync_ie_offset = curr_len;
}
if((ret = frame80215e_create_ie_tsch_synchronization(buf + curr_len, buf_size - curr_len, &ies)) == -1) {
return -1;
}
curr_len += ret;
if((ret = frame80215e_create_ie_tsch_timeslot(buf + curr_len, buf_size - curr_len, &ies)) == -1) {
return -1;
}
curr_len += ret;
if((ret = frame80215e_create_ie_tsch_channel_hopping_sequence(buf + curr_len, buf_size - curr_len, &ies)) == -1) {
return -1;
}
curr_len += ret;
if((ret = frame80215e_create_ie_tsch_slotframe_and_link(buf + curr_len, buf_size - curr_len, &ies)) == -1) {
return -1;
}
curr_len += ret;
ies.ie_mlme_len = curr_len - mlme_ie_offset - 2;
if((ret = frame80215e_create_ie_mlme(buf + mlme_ie_offset, buf_size - mlme_ie_offset, &ies)) == -1) {
return -1;
}
/* Payload IE list termination: optional */
/*
if((ret = frame80215e_create_ie_payload_list_termination(buf + curr_len, buf_size - curr_len, &ies)) == -1) {
return -1;
}
curr_len += ret;
*/
return curr_len;
}
/*---------------------------------------------------------------------------*/
static int
init(void)
{
int put_index;
tsExtAddr node_long_address;
uint16_t node_short_address;
tx_in_progress = 0;
u32JPT_Init();
vMMAC_Enable();
/* Enable/disable interrupts */
if(poll_mode) {
vMMAC_EnableInterrupts(NULL);
vMMAC_ConfigureInterruptSources(0);
} else {
vMMAC_EnableInterrupts(&radio_interrupt_handler);
} vMMAC_ConfigureRadio();
set_channel(MICROMAC_CONF_CHANNEL);
set_txpower(MICROMAC_CONF_TX_POWER);
vMMAC_GetMacAddress(&node_long_address);
/* Short addresses are disabled by default */
node_short_address = (uint16_t)node_long_address.u32L;
vMMAC_SetRxAddress(frame802154_get_pan_id(), node_short_address, &node_long_address);
/* Disable hardware backoff */
vMMAC_SetTxParameters(1, 0, 0, 0);
vMMAC_SetCutOffTimer(0, FALSE);
/* Initialize ring buffer and first input packet pointer */
ringbufindex_init(&input_ringbuf, MIRCOMAC_CONF_BUF_NUM);
/* get pointer to next input slot */
put_index = ringbufindex_peek_put(&input_ringbuf);
if(put_index == -1) {
rx_frame_buffer = NULL;
printf("micromac_radio init:! no buffer available. Abort init.\n");
off();
return 0;
} else {
rx_frame_buffer = &input_array[put_index];
}
input_frame_buffer = rx_frame_buffer;
process_start(µmac_radio_process, NULL);
#if RADIO_TEST_MODE == RADIO_TEST_MODE_HIGH_PWR
/* Enable high power mode.
* In this mode DIO2 goes high during RX
* and DIO3 goes high during TX
**/
vREG_SysWrite(REG_SYS_PWR_CTRL,
u32REG_SysRead(REG_SYS_PWR_CTRL)
| REG_SYSCTRL_PWRCTRL_RFRXEN_MASK
| REG_SYSCTRL_PWRCTRL_RFTXEN_MASK);
#elif RADIO_TEST_MODE == RADIO_TEST_MODE_ADVANCED
/* output internal radio status on IO pins.
* See Chris@NXP email */
vREG_SysWrite(REG_SYS_PWR_CTRL,
u32REG_SysRead(REG_SYS_PWR_CTRL) | (1UL << 26UL));
#endif /* TEST_MODE */
return 1;
}
