/*---------------------------------------------------------------------------*/
PROCESS_THREAD(delete_process, ev, data)
{
static struct etimer update_check_timer;
static struct etimer update_send_timer;
static struct akes_nbr_entry *next;
PROCESS_BEGIN();
PRINTF("akes-delete: Started update_process\n");
etimer_set(&update_check_timer, UPDATE_CHECK_INTERVAL * CLOCK_SECOND);
while(1) {
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&update_check_timer));
PRINTF("akes-delete: #permanent = %d\n", akes_nbr_count(AKES_NBR_PERMANENT));
next = akes_nbr_head();
while(next) {
if(!next->permanent || !akes_nbr_is_expired(next, AKES_NBR_PERMANENT)) {
next = akes_nbr_next(next);
continue;
}
/* wait for a random period of time to avoid collisions */
etimer_set(&update_send_timer, akes_get_random_waiting_period());
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&update_send_timer));
/* check if something happened in the meantime */
if(!akes_nbr_is_expired(next, AKES_NBR_PERMANENT)) {
next = akes_nbr_next(next);
continue;
}
/* send UPDATE */
akes_send_update(next);
PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_POLL);
PRINTF("akes-delete: Sent UPDATE\n");
etimer_set(&update_send_timer, UPDATEACK_WAITING_PERIOD * CLOCK_SECOND);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&update_send_timer));
if(akes_nbr_is_expired(next, AKES_NBR_PERMANENT)) {
akes_nbr_delete(next, AKES_NBR_PERMANENT);
next = akes_nbr_head();
} else {
next = akes_nbr_next(next);
}
}
etimer_restart(&update_check_timer);
}
PROCESS_END();
}
/**
* Payload format:
* | 0x0d | 0x00 | CCM*-MIC for neighbor 0 | ... | CCM*-MIC for last neighbor |
*/
static void
prepare_announce(void)
{
struct akes_nbr_entry *next;
uint8_t announced_mics[NBR_TABLE_MAX_NEIGHBORS * ADAPTIVESEC_BROADCAST_MIC_LEN];
uint8_t *payload;
uint8_t announced_mics_len;
uint8_t max_index;
max_index = 0;
next = akes_nbr_head();
while(next) {
if(next->permanent) {
adaptivesec_aead(next->permanent->pairwise_key,
0,
announced_mics + (next->local_index * ADAPTIVESEC_BROADCAST_MIC_LEN),
1);
if(next->local_index > max_index) {
max_index = next->local_index;
}
}
next = akes_nbr_next(next);
}
/* reset packetbuf for sending a command frame */
payload = adaptivesec_prepare_command(CORESEC_STRATEGY_ANNOUNCE_IDENTIFIER, &linkaddr_null);
/* write payload */
/* TODO We currently assume that all MICs fit within a single ANNOUNCE command */
payload[0] = 0;
announced_mics_len = (max_index + 1) * ADAPTIVESEC_BROADCAST_MIC_LEN;
memcpy(payload + 1, announced_mics, announced_mics_len);
packetbuf_set_datalen(1 + 1 + announced_mics_len);
}
/*---------------------------------------------------------------------------*/
void
reset_trickle_info(void)
{
struct akes_nbr_entry *next;
next = akes_nbr_head();
while(next) {
if(next->permanent) {
next->permanent->sent_authentic_hello = 0;
}
next = akes_nbr_next(next);
}
}