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update to support ena-eke-proxy

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Lurkars
2020-12-06 12:46:36 +01:00
parent 8b38bde332
commit 9d0703aa62
28 changed files with 656 additions and 4771 deletions
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components/ena/ena-exposure.c
+86 -14
View File
@@ -243,6 +243,7 @@ void ena_exposure_summary(ena_exposure_config_t *config)
}
params.duration = exposure_info.duration_minutes;
params.attenuation = exposure_info.typical_attenuation;
params.report_type = exposure_info.report_type;
int score = ena_exposure_risk_score(config, params);
if (score > current_summary->max_risk_score)
{
@@ -270,20 +271,13 @@ ena_exposure_config_t *ena_exposure_default_config(void)
void ena_exposure_check(ena_beacon_t beacon, ena_temporary_exposure_key_t temporary_exposure_key)
{
uint32_t timestamp_day_start = temporary_exposure_key.rolling_start_interval_number * ENA_TIME_WINDOW;
uint32_t timestamp_day_end = temporary_exposure_key.rolling_start_interval_number * ENA_TIME_WINDOW + temporary_exposure_key.rolling_period * ENA_TIME_WINDOW;
uint32_t timestamp_day_end = (temporary_exposure_key.rolling_start_interval_number + temporary_exposure_key.rolling_period) * ENA_TIME_WINDOW;
if (beacon.timestamp_first > timestamp_day_start && beacon.timestamp_last < timestamp_day_end)
{
ESP_LOGD(ENA_EXPOSURE_LOG, "matched timestamps!");
ESP_LOGD(ENA_EXPOSURE_LOG, "Beacon: %u,%u,%d", beacon.timestamp_first, beacon.timestamp_last, beacon.rssi);
ESP_LOG_BUFFER_HEXDUMP(ENA_EXPOSURE_LOG, beacon.rpi, ENA_KEY_LENGTH, ESP_LOG_DEBUG);
ESP_LOG_BUFFER_HEXDUMP(ENA_EXPOSURE_LOG, beacon.aem, ENA_AEM_METADATA_LENGTH, ESP_LOG_DEBUG);
ESP_LOGD(ENA_EXPOSURE_LOG, "Key: %u,%u,%d", timestamp_day_start, timestamp_day_end, temporary_exposure_key.rolling_period);
ESP_LOG_BUFFER_HEXDUMP(ENA_EXPOSURE_LOG, temporary_exposure_key.key_data, ENA_KEY_LENGTH, ESP_LOG_DEBUG);
bool match = false;
ena_exposure_information_t exposure_info;
exposure_info.day = timestamp_day_start;
exposure_info.duration_minutes = 0;
exposure_info.min_attenuation = INT_MAX;
exposure_info.typical_attenuation = 0;
@@ -298,8 +292,7 @@ void ena_exposure_check(ena_beacon_t beacon, ena_temporary_exposure_key_t tempor
if (memcmp(beacon.rpi, rpi, sizeof(ENA_KEY_LENGTH)) == 0)
{
match = true;
exposure_info.day = timestamp_day_start;
exposure_info.duration_minutes += (ENA_BEACON_TRESHOLD / 60);
exposure_info.duration_minutes += ((beacon.timestamp_last - beacon.timestamp_first) / 60);
exposure_info.typical_attenuation = (exposure_info.typical_attenuation + beacon.rssi) / 2;
if (beacon.rssi < exposure_info.min_attenuation)
{
@@ -315,13 +308,92 @@ void ena_exposure_check(ena_beacon_t beacon, ena_temporary_exposure_key_t tempor
}
}
int ena_expore_check_find_min_rec(int min, int max, uint32_t timestamp)
{
if (min < 0)
{
return -1;
}
if (min >= max - 1)
{
return min;
}
ena_beacon_t beacon;
int mid = min + (max - min) / 2;
ena_storage_get_beacon(min, &beacon);
if (beacon.timestamp_first < timestamp)
{
return ena_expore_check_find_min_rec(mid, max, timestamp);
}
else if (beacon.timestamp_first > timestamp)
{
return ena_expore_check_find_min_rec(min - ((max - min) / 2), mid, timestamp);
}
else
{
return min;
}
}
int ena_expore_check_find_min(uint32_t timestamp)
{
return ena_expore_check_find_min_rec(0, (ena_storage_beacons_count() - 1), timestamp);
}
int ena_expore_check_find_max_rec(int min, int max, int max_max, uint32_t timestamp)
{
if (max > max_max)
{
return -1;
}
if (max <= (min + 1))
{
return max;
}
ena_beacon_t beacon;
int mid = min + (max - min) / 2;
ena_storage_get_beacon(max, &beacon);
if (beacon.timestamp_first > timestamp)
{
return ena_expore_check_find_max_rec(min, mid, max_max, timestamp);
}
else if (beacon.timestamp_first < timestamp)
{
return ena_expore_check_find_max_rec(mid, max + ((max - min) / 2), max_max, timestamp);
}
else
{
return max;
}
}
int ena_expore_check_find_max(uint32_t timestamp)
{
return ena_expore_check_find_max_rec(0, (ena_storage_beacons_count() - 1), (ena_storage_beacons_count() - 1), timestamp);
}
void ena_exposure_check_temporary_exposure_key(ena_temporary_exposure_key_t temporary_exposure_key)
{
uint32_t timestamp_start = temporary_exposure_key.rolling_start_interval_number * ENA_TIME_WINDOW;
uint32_t timestamp_end = (temporary_exposure_key.rolling_start_interval_number + temporary_exposure_key.rolling_period) * ENA_TIME_WINDOW;
int min = ena_expore_check_find_min(timestamp_start);
int max = ena_expore_check_find_max(timestamp_end);
if (min == -1 || max == -1)
{
return;
}
ena_beacon_t beacon;
uint32_t beacons_count = ena_storage_beacons_count();
for (int y = 0; y < beacons_count; y++)
for (int y = min; y <= max; y++)
{
ena_storage_get_beacon(y, &beacon);
ena_exposure_check(beacon, temporary_exposure_key);
}
}
}
components/ena/include/ena-exposure.h
+14
View File
@@ -239,6 +239,20 @@ ena_exposure_config_t *ena_exposure_default_config(void);
*/
void ena_exposure_check(ena_beacon_t beacon, ena_temporary_exposure_key_t temporary_exposure_key);
/**
* @brief find minimal key index of beacons for a certain timestamp
*
* @param[in] timestamp the timestamp to check against
*/
int ena_expore_check_find_min(uint32_t timestamp);
/**
* @brief find maximum key index of beacons for a certain timestamp
*
* @param[in] timestamp the timestamp to check against
*/
int ena_expore_check_find_max(uint32_t timestamp);
/**
* @brief reads Temporary Exposue Key and check for exposures with all beacons
*
components/ena/include/ena-storage.h
+1 -1
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@@ -59,7 +59,7 @@ typedef struct __attribute__((__packed__))
uint32_t day; // Day of the exposure, using UTC, encapsulated as the time of the beginning of that day.
int typical_attenuation; // Aggregation of the attenuations of all of a given diagnosis key's beacons received during the scan, in dB.
int min_attenuation; // Minimum attenuation of all of a given diagnosis key's beacons received during the scan, in dB.
int duration_minutes; //The duration of the exposure in minutes.
int duration_minutes; // The duration of the exposure in minutes.
int report_type; // Type of diagnosis associated with a key.
} ena_exposure_information_t;