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ntp: add offset option

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Add offset option to the server/pool/peer directive. It specifies a
correction which will be applied to offsets measured with the NTP
source. It's particularly useful to compensate for a known asymmetry in
network delay or timestamping errors.
This commit is contained in:
Miroslav Lichvar
2016-06-28 15:27:44 +02:00
parent 632cd1a177
commit 6cd558398a
5 changed files with 22 additions and 1 deletions
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4
cmdparse.c
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@@ -63,6 +63,7 @@ CPS_ParseNTPSourceAdd(char *line, CPS_NTP_Source *src)
src->params.max_delay = SRC_DEFAULT_MAXDELAY;
src->params.max_delay_ratio = SRC_DEFAULT_MAXDELAYRATIO;
src->params.max_delay_dev_ratio = SRC_DEFAULT_MAXDELAYDEVRATIO;
src->params.offset = 0.0;
hostname = line;
line = CPS_SplitWord(line);
@@ -123,6 +124,9 @@ CPS_ParseNTPSourceAdd(char *line, CPS_NTP_Source *src)
} else if (!strcasecmp(cmd, "minstratum")) {
if (sscanf(line, "%d%n", &src->params.min_stratum, &n) != 1)
return 0;
} else if (!strcasecmp(cmd, "offset")) {
if (sscanf(line, "%lf%n", &src->params.offset, &n) != 1)
return 0;
} else if (!strcasecmp(cmd, "port")) {
if (sscanf(line, "%hu%n", &src->port, &n) != 1)
return 0;