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Validate sample times received in refclock

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This commit is contained in:
Miroslav Lichvar 2009-11-03 16:40:12 +01:00
parent 6640993f20
commit a822bcfd67
1 changed files with 20 additions and 0 deletions
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20
refclock.c
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@ -75,6 +75,7 @@ struct RCL_Instance_Record {
static struct RCL_Instance_Record refclocks[MAX_RCL_SOURCES];
static int n_sources = 0;
static int valid_sample_time(RCL_Instance instance, struct timeval *tv);
static int pps_stratum(RCL_Instance instance, struct timeval *tv);
static void poll_timeout(void *arg);
static void slew_samples(struct timeval *raw, struct timeval *cooked, double dfreq, double afreq,
@ -250,6 +251,9 @@ RCL_AddSample(RCL_Instance instance, struct timeval *sample_time, double offset,
correction = LCL_GetOffsetCorrection(sample_time);
UTI_AddDoubleToTimeval(sample_time, correction, &cooked_time);
if (!valid_sample_time(instance, sample_time))
return 0;
#if 0
LOG(LOGS_INFO, LOGF_Refclock, "refclock sample offset=%.9f cooked=%.9f",
offset, offset - correction + instance->offset);
@ -277,6 +281,9 @@ RCL_AddPulse(RCL_Instance instance, struct timeval *pulse_time, double second)
correction = LCL_GetOffsetCorrection(pulse_time);
UTI_AddDoubleToTimeval(pulse_time, correction, &cooked_time);
if (!valid_sample_time(instance, pulse_time))
return 0;
rate = instance->pps_rate;
assert(rate > 0);
@ -314,6 +321,19 @@ RCL_AddPulse(RCL_Instance instance, struct timeval *pulse_time, double second)
return 1;
}
static int
valid_sample_time(RCL_Instance instance, struct timeval *tv)
{
struct timeval raw_time;
double diff;
LCL_ReadRawTime(&raw_time);
UTI_DiffTimevalsToDouble(&diff, &raw_time, tv);
if (diff < 0.0 || diff > 1 << (instance->poll + 1))
return 0;
return 1;
}
static int
pps_stratum(RCL_Instance instance, struct timeval *tv)
{