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fix(fronthaul): Fix UTC-to-GPS timestamp conversion

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Add missing leap second offsert for UTC-to-GPS coversion.

Signed-off-by: Bartosz Podrygajlo <bartosz.podrygajlo@openairinterface.org>
This commit is contained in:
Bartosz Podrygajlo
2026-06-09 10:20:00 +02:00
parent 8b04c038f1
commit 0bcc3b3229
6 changed files with 6 additions and 5 deletions
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2
fronthaul/core/fh_timer.c
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@@ -18,7 +18,7 @@ static uint64_t get_gps_ns(void)
{
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
return ((uint64_t)ts.tv_sec - GPS_EPOCH_OFFSET_UNIX) * NS_PER_SEC + ts.tv_nsec;
return ((uint64_t)ts.tv_sec - GPS_EPOCH_OFFSET_UNIX + GPS_LEAP_SECONDS) * NS_PER_SEC + ts.tv_nsec;
}
void fh_timer_tick(fh_timer_t *timer)

1
fronthaul/core/fh_timer.h
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@@ -23,6 +23,7 @@ typedef void (*fh_timer_cb)(uint64_t s_abs, void *user_data);
#define MAX_FH_TIMER_CBS 8
#define GPS_EPOCH_OFFSET_UNIX 315964800ULL
#define GPS_LEAP_SECONDS 18
typedef struct {
fh_timer_cb fn;

2
fronthaul/core/tests/test_fh_recv_drift.c
View File

@@ -25,7 +25,7 @@ static uint64_t get_gps_ns(void)
{
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
return ((uint64_t)ts.tv_sec - GPS_EPOCH_OFFSET_UNIX) * NS_PER_SEC + ts.tv_nsec;
return ((uint64_t)ts.tv_sec - GPS_EPOCH_OFFSET_UNIX + GPS_LEAP_SECONDS) * NS_PER_SEC + ts.tv_nsec;
}
typedef struct {

2
fronthaul/core/tests/test_fh_timer.c
View File

@@ -19,7 +19,7 @@ static uint64_t get_gps_ns(void)
{
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
return ((uint64_t)ts.tv_sec - GPS_EPOCH_OFFSET_UNIX) * NS_PER_SEC + ts.tv_nsec;
return ((uint64_t)ts.tv_sec - GPS_EPOCH_OFFSET_UNIX + GPS_LEAP_SECONDS) * NS_PER_SEC + ts.tv_nsec;
}
typedef struct {

2
fronthaul/core/tests/test_fh_timer_drift.c
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@@ -20,7 +20,7 @@ static uint64_t get_gps_ns(void)
{
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
return ((uint64_t)ts.tv_sec - GPS_EPOCH_OFFSET_UNIX) * NS_PER_SEC + ts.tv_nsec;
return ((uint64_t)ts.tv_sec - GPS_EPOCH_OFFSET_UNIX + GPS_LEAP_SECONDS) * NS_PER_SEC + ts.tv_nsec;
}
typedef struct {

2
fronthaul/oru/oru_fh.c
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@@ -255,7 +255,7 @@ int oru_fh_get_utc_anchor_point(void *handle, uint32_t *frame, uint32_t *slot, s
uint64_t total_syms_per_sec = (NR_SYMBOLS_PER_SLOT * 1000) << fh->cfg.numerology;
uint64_t ns_per_symbol = 1000000000 / total_syms_per_sec;
uint64_t leftover_syms = absolute_gps_symbol % total_syms_per_sec;
ts->tv_sec = (absolute_gps_symbol / total_syms_per_sec) + GPS_EPOCH_OFFSET_UNIX;
ts->tv_sec = (absolute_gps_symbol / total_syms_per_sec) + GPS_EPOCH_OFFSET_UNIX - GPS_LEAP_SECONDS;
ts->tv_nsec = leftover_syms * ns_per_symbol;
return 0;
}