faraphel/chrony
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

ntp: limit maxdelay parameters

Browse source
This commit is contained in:
Miroslav Lichvar 2017-01-10 10:58:44 +01:00
parent a7802e9a76
commit f2f834e7e7
2 changed files with 15 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
doc/chrony.conf.adoc
View file

@ -105,7 +105,7 @@ If the user knows that round trip delays above a certain level should cause the
measurement to be ignored, this level can be defined with the *maxdelay*
option. For example, *maxdelay 0.3* would indicate that measurements with a
round-trip delay of 0.3 seconds or more should be ignored. The default value is
3 seconds.
3 seconds and the maximum value is 1000 seconds.
*maxdelayratio* _ratio_:::
This option is similar to the maxdelay option above. *chronyd* keeps a record
of the minimum round-trip delay amongst the previous measurements that it has

23
ntp_core.c
View file

@ -243,6 +243,11 @@ static ARR_Instance broadcasts;
/* Maximum acceptable delay in transmission for timestamp correction */
#define MAX_TX_DELAY 1.0
/* Maximum allowed values of maxdelay parameters */
#define MAX_MAX_DELAY 1.0e3
#define MAX_MAX_DELAY_RATIO 1.0e6
#define MAX_MAX_DELAY_DEV_RATIO 1.0e6
/* Minimum and maximum allowed poll interval */
#define MIN_POLL 0
#define MAX_POLL 24
@ -513,9 +518,9 @@ NCR_GetInstance(NTP_Remote_Address *remote_addr, NTP_Source_Type type, SourcePar
if (result->presend_minpoll <= MAX_POLL && result->mode != MODE_CLIENT)
result->presend_minpoll = MAX_POLL + 1;
result->max_delay = params->max_delay;
result->max_delay_ratio = params->max_delay_ratio;
result->max_delay_dev_ratio = params->max_delay_dev_ratio;
result->max_delay = CLAMP(0.0, params->max_delay, MAX_MAX_DELAY);
result->max_delay_ratio = CLAMP(0.0, params->max_delay_ratio, MAX_MAX_DELAY_RATIO);
result->max_delay_dev_ratio = CLAMP(0.0, params->max_delay_dev_ratio, MAX_MAX_DELAY_DEV_RATIO);
result->offset_correction = params->offset;
result->auto_offline = params->auto_offline;
result->poll_target = params->poll_target;
@ -2106,9 +2111,9 @@ NCR_ModifyMaxpoll(NCR_Instance inst, int new_maxpoll)
void
NCR_ModifyMaxdelay(NCR_Instance inst, double new_max_delay)
{
inst->max_delay = new_max_delay;
inst->max_delay = CLAMP(0.0, new_max_delay, MAX_MAX_DELAY);
LOG(LOGS_INFO, LOGF_NtpCore, "Source %s new max delay %f",
UTI_IPToString(&inst->remote_addr.ip_addr), new_max_delay);
UTI_IPToString(&inst->remote_addr.ip_addr), inst->max_delay);
}
/* ================================================== */
@ -2116,9 +2121,9 @@ NCR_ModifyMaxdelay(NCR_Instance inst, double new_max_delay)
void
NCR_ModifyMaxdelayratio(NCR_Instance inst, double new_max_delay_ratio)
{
inst->max_delay_ratio = new_max_delay_ratio;
inst->max_delay_ratio = CLAMP(0.0, new_max_delay_ratio, MAX_MAX_DELAY_RATIO);
LOG(LOGS_INFO, LOGF_NtpCore, "Source %s new max delay ratio %f",
UTI_IPToString(&inst->remote_addr.ip_addr), new_max_delay_ratio);
UTI_IPToString(&inst->remote_addr.ip_addr), inst->max_delay_ratio);
}
/* ================================================== */
@ -2126,9 +2131,9 @@ NCR_ModifyMaxdelayratio(NCR_Instance inst, double new_max_delay_ratio)
void
NCR_ModifyMaxdelaydevratio(NCR_Instance inst, double new_max_delay_dev_ratio)
{
inst->max_delay_dev_ratio = new_max_delay_dev_ratio;
inst->max_delay_dev_ratio = CLAMP(0.0, new_max_delay_dev_ratio, MAX_MAX_DELAY_DEV_RATIO);
LOG(LOGS_INFO, LOGF_NtpCore, "Source %s new max delay dev ratio %f",
UTI_IPToString(&inst->remote_addr.ip_addr), new_max_delay_dev_ratio);
UTI_IPToString(&inst->remote_addr.ip_addr), inst->max_delay_dev_ratio);
}
/* ================================================== */