/**
* \brief Get the age of the bundle
* \param bundlemem Bundle MMEM Pointer
* \return Age in milliseconds
*/
uint32_t bundle_ageing_get_age(struct mmem * bundlemem) {
struct bundle_t *bundle;
udtn_timeval_t tv;
if( bundlemem == NULL ) {
return 0;
}
bundle = (struct bundle_t *) MMEM_PTR(bundlemem);
if( bundle == NULL ) {
return 0;
}
// Bundle has a timestamp and we have time sync
if( bundle->tstamp != 0 && udtn_getclockstate() >= UDTN_CLOCK_STATE_GOOD ) {
// Get current time
udtn_gettimeofday(&tv);
// Convert into DTN time
tv.tv_sec -= UDTN_CLOCK_DTN_EPOCH_OFFSET;
// If our clock is ahead of the bundle timestamp the age seems to be 0
if( tv.tv_sec < bundle->tstamp ) {
return 0;
}
// Calculate age based on timestamp and current time
return (tv.tv_sec - bundle->tstamp) * 1000 + tv.tv_usec / 1000;
}
// We have to rely on the age block information
return bundle->aeb_value_ms + (xTaskGetTickCount() - bundle->rec_time) / portTICK_PERIOD_MS;
}
udtn_time_t udtn_time(udtn_time_t *t) {
udtn_timeval_t ret;
udtn_gettimeofday(&ret);
if (t != NULL) {
(*t) = ret.tv_sec;
return 0;
}
return ret.tv_sec;
}
int dtntp_discovery_add_service(uint8_t * ipnd_buffer, int length, int * offset) {
char string_buffer[60];
int len;
udtn_timeval_t tv;
float rating;
// get local clock rating
rating = dtntp_get_rating();
// do not send sync beacons if clock rating is zero
if (rating == 0.0) return 0;
// get local time
udtn_gettimeofday(&tv);
// do not send sync beacons if the clock timestamp is wrong
if (tv.tv_sec < UDTN_CLOCK_DTN_EPOCH_OFFSET) return 0;
// Convert timestamp into DTN time
tv.tv_sec -= UDTN_CLOCK_DTN_EPOCH_OFFSET;
len = sprintf(string_buffer, DTNTP_SERVICE_TAG);
(*offset) += sdnv_encode(len, ipnd_buffer + (*offset), length - (*offset));
memcpy(ipnd_buffer + (*offset), string_buffer, len);
(*offset) += len;
if (rating < 1.0f) {
len = sprintf(string_buffer, "version=2;quality=0.%lu;timestamp=%li;", \
(unsigned long)(rating * 1000000), tv.tv_sec);
}
else {
len = sprintf(string_buffer, "version=2;quality=1.0;timestamp=%li;", \
tv.tv_sec);
}
(*offset) += sdnv_encode(len, ipnd_buffer + (*offset), length - (*offset));
memcpy(ipnd_buffer + (*offset), string_buffer, len);
(*offset) += len;
return 1;
}
