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/* Copyright 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <osmocom/core/timer.h>
#include <osmocom/hlr/timestamp.h>
/* Central implementation to set a timestamp to the current time, in case we want to modify this in the future. */
void timestamp_update(timestamp_t *timestamp)
{
struct timeval tv;
time_t raw;
struct tm utc;
/* The simpler way would be just time(&raw), but by using osmo_gettimeofday() we can also use
* osmo_gettimeofday_override for unit tests independent from real time. */
osmo_gettimeofday(&tv, NULL);
raw = tv.tv_sec;
gmtime_r(&raw, &utc);
*timestamp = mktime(&utc);
}
/* Calculate seconds since a given timestamp was taken. Return true for a valid age returned in age_p, return false if
* the timestamp is either in the future or the age surpasses uint32_t range. When false is returned, *age_p is set to
* UINT32_MAX. */
bool timestamp_age(const timestamp_t *timestamp, uint32_t *age_p)
{
int64_t age64;
timestamp_t now;
timestamp_update(&now);
age64 = (int64_t)now - (int64_t)(*timestamp);
if (age64 < 0 || age64 > UINT32_MAX) {
*age_p = UINT32_MAX;
return false;
}
*age_p = (uint32_t)age64;
return true;
}
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