static void test_fib_15_get_lifetime(void)
{
timex_t lifetime, now;
kernel_pid_t iface_id = 1;
char addr_dst[] = "Test address151";
char addr_nxt[] = "Test address152";
size_t add_buf_size = 16;
uint32_t addr_dst_flags = 0x77777777;
uint32_t addr_nxt_flags = 0x77777777;
TEST_ASSERT_EQUAL_INT(0, fib_add_entry(iface_id, (uint8_t *)addr_dst, add_buf_size - 1,
addr_dst_flags, (uint8_t *)addr_nxt, add_buf_size - 1,
addr_nxt_flags, 1000));
TEST_ASSERT_EQUAL_INT(0, fib_devel_get_lifetime(&lifetime, (uint8_t *)addr_dst, add_buf_size - 1));
/* assuming some ms passed during these operations... */
vtimer_now(&now);
timex_t cmp_lifetime = timex_add(now, timex_set(0, 900000));
timex_t cmp_max_lifetime = timex_add(now, timex_set(1,1));
TEST_ASSERT_EQUAL_INT(1, timex_cmp(lifetime, cmp_lifetime));
/* make sure lifetime hasn't grown magically either */
TEST_ASSERT_EQUAL_INT(-1, timex_cmp(lifetime, cmp_max_lifetime));
fib_deinit();
}
static void test_timex_sub(void)
{
timex_t time;
time = timex_sub(timex_set(100, 100), timex_set(40, 10));
TEST_ASSERT_EQUAL_INT(0, timex_cmp(time, timex_set(60, 90)));
time = timex_sub(timex_set(100, 100), timex_set(40, 200));
TEST_ASSERT_EQUAL_INT(0, timex_cmp(time, timex_set(59, 999900)));
}
static void test_timex_add(void)
{
timex_t time;
time = timex_add(timex_set(100, 100), timex_set(40, 10));
TEST_ASSERT_EQUAL_INT(0, timex_cmp(time, timex_set(140, 110)));
time = timex_add(timex_set(100, 700000), timex_set(40, 800000));
TEST_ASSERT_EQUAL_INT(0, timex_cmp(time, timex_set(141, 500000)));
}
static void calc_rtt(void)
{
timex_t rtt = timex_sub(end, start);
rtt_sum = timex_add(rtt_sum, rtt);
l2_ping_stats.last_rtt = rtt;
l2_ping_stats.avg_rtt = timex_from_uint64(timex_uint64(rtt_sum) / l2_ping_stats.pong_count);
if (timex_cmp(rtt, l2_ping_stats.max_rtt) > 0) {
l2_ping_stats.max_rtt = rtt;
}
if (timex_cmp(rtt, l2_ping_stats.min_rtt) < 0) {
l2_ping_stats.min_rtt = rtt;
}
}
/*
* Check if entry at index i is stale and clear the struct it fills if it is
*/
static void _reset_entry_if_stale(uint8_t i)
{
vtimer_now(&now);
if (timex_cmp(rreq_table[i].timestamp, null_time) == 0) {
return;
}
timex_t expiration_time = timex_add(rreq_table[i].timestamp, _max_idletime);
if (timex_cmp(expiration_time, now) < 0) {
/* timestamp+expiration time is in the past: this entry is stale */
DEBUG("\treset rreq table entry %s\n",
netaddr_to_string(&nbuf, &rreq_table[i].origNode));
memset(&rreq_table[i], 0, sizeof(rreq_table[i]));
}
}
/*
* Check if entry at index i is stale as described in Section 6.3.
* and clear the struct it fills if it is
*/
static void _reset_entry_if_stale(uint8_t i)
{
vtimer_now(&now);
timex_t lastUsed, expirationTime;
if (timex_cmp(routing_table[i].expirationTime, null_time) == 0) {
return;
}
int state = routing_table[i].state;
lastUsed = routing_table[i].lastUsed;
expirationTime = routing_table[i].expirationTime;
/* an Active route is considered to remain Active as long as it is used at least once
* during every ACTIVE_INTERVAL. When a route is no longer Active, it becomes an Idle route. */
/* if the node is younger than the active interval, don't bother */
if (timex_cmp(now, active_interval) < 0) {
return;
}
if ((state == ROUTE_STATE_ACTIVE) &&
(timex_cmp(timex_sub(now, active_interval), lastUsed) == 1)) {
DEBUG("\t[routing] route towards %s Idle\n",
netaddr_to_string(&nbuf, &routing_table[i].addr));
routing_table[i].state = ROUTE_STATE_IDLE;
routing_table[i].lastUsed = now; /* mark the time entry was set to Idle */
}
/* After an Idle route remains Idle for MAX_IDLETIME, it becomes an Invalid route. */
/* if the node is younger than the expiration time, don't bother */
if (timex_cmp(now, expirationTime) < 0) {
return;
}
/* If Current_Time > Route.ExpirationTime, set Route.State := Invalid. */
if ((state == ROUTE_STATE_IDLE) &&
(timex_cmp(now, expirationTime) > 0)) {
DEBUG("\t[routing] route towards %s became Invalid\n",
netaddr_to_string(&nbuf, &routing_table[i].addr));
routing_table[i].state = ROUTE_STATE_INVALID;
routing_table[i].lastUsed = now; /* mark the time entry was set to Invalid */
}
/* If (Current_Time - Route.LastUsed) > (ACTIVE_INTERVAL + MAX_IDLETIME),
* and if (Route.Timed == FALSE), set Route.State := Invalid. */
if ((timex_cmp(timex_sub(now, lastUsed), timex_add(active_interval, max_idletime)) > 0) &&
(state != ROUTE_STATE_TIMED)) {
routing_table[i].state = ROUTE_STATE_INVALID;
}
/* After that time, old sequence number information is considered no longer
* valid and the Invalid route MUST BE expunged */
if (timex_cmp(timex_sub(now, lastUsed), max_seqnum_lifetime) >= 0) {
DEBUG("\t[routing] Expunged routing table entry for %s at %i\n",
netaddr_to_string(&nbuf, &routing_table[i].addr), i);
memset(&routing_table[i], 0, sizeof(routing_table[i]));
}
}
cv_status condition_variable::wait_until(unique_lock<mutex>& lock,
const time_point& timeout_time) {
xtimer_t timer;
// todo: use function to wait for absolute timepoint once available
timex_t before;
xtimer_now_timex(&before);
auto diff = timex_sub(timeout_time.native_handle(), before);
xtimer_set_wakeup(&timer, timex_uint64(diff), sched_active_pid);
wait(lock);
timex_t after;
xtimer_now_timex(&after);
xtimer_remove(&timer);
auto cmp = timex_cmp(after, timeout_time.native_handle());
return cmp < 1 ? cv_status::no_timeout : cv_status::timeout;
}
void cc1100_phy_init(void)
{
int i;
rx_buffer_head = 0;
rx_buffer_tail = 0;
rx_buffer_size = 0;
/* Initialize RX-Buffer (clear content) */
for (i = 0; i < RX_BUFF_SIZE; i++) {
rx_buffer->packet.length = 0;
}
/* Initialize handler table & packet monitor */
packet_monitor = NULL;
pm_init_table((pm_table_t *)&handler_table, MAX_PACKET_HANDLERS, handlers);
/* Clear sequence number buffer */
memset(seq_buffer, 0, sizeof(seq_buffer_entry_t) * MAX_SEQ_BUFFER_SIZE);
/* Initialize mutex */
cc1100_mutex_pid = -1;
mutex_init(&cc1100_mutex);
/* Allocate event numbers and start cc1100 event process */
cc1100_event_handler_pid = thread_create(event_handler_stack, sizeof(event_handler_stack), PRIORITY_CC1100, CREATE_STACKTEST,
cc1100_event_handler_function, cc1100_event_handler_name);
/* Active watchdog for the first time */
if (radio_mode == CC1100_MODE_CONSTANT_RX) {
cc1100_watch_dog_period = timex_set(CC1100_WATCHDOG_PERIOD, 0);
if (timex_cmp(cc1100_watch_dog_period, timex_set(0, 0)) != 0) {
vtimer_set_msg(&cc1100_watch_dog, cc1100_watch_dog_period, cc1100_event_handler_pid, NULL);
}
}
}
/**
* @brief returns pointer to the entry for the given destination address
*
* @param[in] dst the destination address
* @param[in] dst_size the destination address size
* @param[out] entry_arr the array to scribe the found match
* @param[in, out] entry_arr_size the number of entries provided by entry_arr (should be always 1)
* this value is overwritten with the actual found number
*
* @return 0 if we found a next-hop prefix
* 1 if we found the exact address next-hop
* -EHOSTUNREACH if no fitting next-hop is available
*/
static int fib_find_entry(uint8_t *dst, size_t dst_size,
fib_entry_t **entry_arr, size_t *entry_arr_size)
{
timex_t now;
vtimer_now(&now);
size_t count = 0;
size_t prefix_size = 0;
size_t match_size = dst_size;
int ret = -EHOSTUNREACH;
for (size_t i = 0; i < FIB_MAX_FIB_TABLE_ENTRIES; ++i) {
/* autoinvalidate if the entry lifetime is not set to not expire */
if ((fib_table[i].lifetime.seconds != FIB_LIFETIME_NO_EXPIRE)
|| (fib_table[i].lifetime.microseconds != FIB_LIFETIME_NO_EXPIRE)) {
/* check if the lifetime expired */
if (timex_cmp(now, fib_table[i].lifetime) > -1) {
/* remove this entry if its lifetime expired */
fib_table[i].lifetime.seconds = 0;
fib_table[i].lifetime.microseconds = 0;
if (fib_table[i].global != NULL) {
universal_address_rem(fib_table[i].global);
fib_table[i].global = NULL;
}
if (fib_table[i].next_hop != NULL) {
universal_address_rem(fib_table[i].next_hop);
fib_table[i].next_hop = NULL;
}
}
}
if ((prefix_size < dst_size) &&
(fib_table[i].global != NULL) &&
(universal_address_compare(fib_table[i].global, dst, &match_size) == 0)) {
/* If we found an exact match */
if (match_size == dst_size) {
entry_arr[0] = &(fib_table[i]);
*entry_arr_size = 1;
/* we will not find a better one so we return */
return 1;
}
else {
/* we try to find the most fitting prefix */
if (match_size > prefix_size) {
entry_arr[0] = &(fib_table[i]);
/* we could find a better one so we move on */
ret = 0;
}
}
prefix_size = match_size;
match_size = dst_size;
count = 1;
}
}
*entry_arr_size = count;
return ret;
}
/*---------------------------------------------------------------------------*/
int cc1100_send_csmaca(radio_address_t address, protocol_t protocol, int priority, char *payload, radio_packet_length_t payload_len)
{
uint16_t min_window_size;
uint16_t max_window_size;
uint16_t difs;
uint16_t slottime;
switch(priority) {
case PRIORITY_ALARM:
min_window_size = PRIO_ALARM_MIN_WINDOW_SIZE;
max_window_size = PRIO_ALARM_MAX_WINDOW_SIZE;
difs = PRIO_ALARM_DIFS;
slottime = PRIO_ALARM_SLOTTIME;
break;
case PRIORITY_WARNING:
min_window_size = PRIO_WARN_MIN_WINDOW_SIZE;
max_window_size = PRIO_WARN_MAX_WINDOW_SIZE;
difs = PRIO_WARN_DIFS;
slottime = PRIO_WARN_SLOTTIME;
break;
default:
min_window_size = PRIO_DATA_MIN_WINDOW_SIZE;
max_window_size = PRIO_DATA_MAX_WINDOW_SIZE;
difs = PRIO_DATA_DIFS;
slottime = PRIO_DATA_SLOTTIME;
}
/* Calculate collisions per second */
if (collision_state == COLLISION_STATE_INITIAL) {
vtimer_now(&collision_measurement_start);
collision_count = 0;
collisions_per_sec = 0;
collision_state = COLLISION_STATE_MEASURE;
}
else if (collision_state == COLLISION_STATE_MEASURE) {
timex_t now;
vtimer_now(&now);
timex_t timespan = timex_sub(now, collision_measurement_start);
if (timex_cmp(timespan, timex_set(1, 0)) > 0) {
collisions_per_sec = (collision_count * 1000000) / (double) timex_uint64(timespan);
if (collisions_per_sec > 0.5 && collisions_per_sec <= 2.2) {
timex_t now;
vtimer_now(&now);
collision_measurement_start = now;
collision_state = COLLISION_STATE_KEEP;
}
else if (collisions_per_sec > 2.2) {
timex_t now;
vtimer_now(&now);
collision_measurement_start = now;
collision_state = COLLISION_STATE_KEEP;
}
else {
collision_state = COLLISION_STATE_INITIAL;
}
}
}
else if (collision_state == COLLISION_STATE_KEEP) {
timex_t now;
vtimer_now(&now);
timex_t timespan = timex_sub(now, collision_measurement_start);
if (timex_cmp(timespan, timex_set(5, 0)) > 0) {
collision_state = COLLISION_STATE_INITIAL;
}
}
/* Adjust initial window size according to collision rate */
if (collisions_per_sec > 0.5 && collisions_per_sec <= 2.2) {
min_window_size *= 2;
}
else if (collisions_per_sec > 2.2) {
min_window_size *= 4;
}
uint16_t windowSize = min_window_size; /* Start with window size of PRIO_XXX_MIN_WINDOW_SIZE */
uint16_t backoff = 0; /* Backoff between 1 and windowSize */
uint32_t total; /* Holds the total wait time before send try */
uint32_t cs_timeout; /* Current carrier sense timeout value */
if (protocol == 0) {
return RADIO_INVALID_PARAM; /* Not allowed, protocol id must be greater zero */
}
cc1100_phy_mutex_lock(); /* Lock radio for exclusive access */
/* Get carrier sense timeout based on overall error rate till now */
send_csmaca_calls++;
int fail_percentage = (send_csmaca_calls_cs_timeout * 100) / send_csmaca_calls;
if (fail_percentage == 0) {
fail_percentage = 1;
}
cs_timeout = CARRIER_SENSE_TIMEOUT / fail_percentage;
if (cs_timeout < CARRIER_SENSE_TIMEOUT_MIN) {
cs_timeout = CARRIER_SENSE_TIMEOUT_MIN;
}
cc1100_cs_init(); /* Initialize carrier sensing */
window:
if (backoff != 0) {
goto cycle; /* If backoff was 0 */
}
windowSize *= 2; /* ...double the current window size */
if (windowSize > max_window_size) {
windowSize = max_window_size; /* This is the maximum size allowed */
}
backoff = rand() % windowSize; /* ...and choose new backoff */
backoff += (uint16_t) 1;
cycle:
cs_timeout_flag = 0; /* Carrier sense timeout flag */
cs_hwtimer_id = hwtimer_set(cs_timeout, /* Set hwtimer to set CS timeout flag */
cs_timeout_cb, NULL);
while (cc1100_cs_read()) { /* Wait until air is free */
if (cs_timeout_flag) {
send_csmaca_calls_cs_timeout++;
#ifndef CSMACA_MAC_AGGRESSIVE_MODE
cc1100_phy_mutex_unlock();
cc1100_go_after_tx(); /* Go from RX to default mode */
return RADIO_CS_TIMEOUT; /* Return immediately */
#endif
#ifdef CSMACA_MAC_AGGRESSIVE_MODE
goto send; /* Send anyway */
#endif
}
}
hwtimer_remove(cs_hwtimer_id); /* Remove hwtimer */
cc1100_cs_write_cca(1); /* Air is free now */
cc1100_cs_set_enabled(true);
if (cc1100_cs_read()) {
goto window; /* GDO0 triggers on rising edge, so */
}
/* test once after interrupt is enabled */
if (backoff > 0) {
backoff--; /* Decrement backoff counter */
}
total = slottime; /* Calculate total wait time */
total *= (uint32_t)backoff; /* Slot vector set */
total += difs; /* ...and standard DIFS wait time */
cs_timeout_flag = 0; /* Carrier sense timeout flag */
cs_hwtimer_id = hwtimer_set(total, /* Set hwtimer to set CS timeout flag */
cs_timeout_cb, NULL);
while (!cs_timeout_flag
|| !cc1100_cs_read_cca()) { /* Wait until timeout is finished */
if (cc1100_cs_read_cca() == 0) { /* Is the air still free? */
hwtimer_remove(cs_hwtimer_id);
goto window; /* No. Go back to new wait period. */
}
}
cc1100_cs_set_enabled(false);
#ifdef CSMACA_MAC_AGGRESSIVE_MODE
send:
#endif
int res = cc1100_send(address, protocol, priority, payload, payload_len);
if (res < 0) {
collision_count++;
}
return res;
}