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sources: add option to limit selection by root distance

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Add maxdistance directive to set the maximum root distance the sources
are allowed to have to be selected. This is useful to reject NTPv4
sources that are no longer synchronized and report large dispersion.
The default value is 3 seconds.
This commit is contained in:
Miroslav Lichvar
2015-08-25 16:27:36 +02:00
parent b7a54f8cd8
commit 5039f959e0
5 changed files with 41 additions and 0 deletions
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11
conf.c
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@@ -90,6 +90,7 @@ static double correction_time_ratio = 3.0;
static double max_clock_error = 1.0; /* in ppm */
static double max_slew_rate = 1e6 / 12.0; /* in ppm */
static double max_distance = 3.0;
static double reselect_distance = 1e-4;
static double stratum_weight = 1e-3;
static double combine_limit = 3.0;
@@ -477,6 +478,8 @@ CNF_ParseLine(const char *filename, int number, char *line)
parse_maxchange(p);
} else if (!strcasecmp(command, "maxclockerror")) {
parse_double(p, &max_clock_error);
} else if (!strcasecmp(command, "maxdistance")) {
parse_double(p, &max_distance);
} else if (!strcasecmp(command, "maxsamples")) {
parse_int(p, &max_samples);
} else if (!strcasecmp(command, "maxslewrate")) {
@@ -1524,6 +1527,14 @@ CNF_GetMaxSlewRate(void)
/* ================================================== */
double
CNF_GetMaxDistance(void)
{
return max_distance;
}
/* ================================================== */
double
CNF_GetReselectDistance(void)
{