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Diffstat (limited to '')
-rw-r--r-- | reference.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/reference.h b/reference.h new file mode 100644 index 0000000..4f57f0e --- /dev/null +++ b/reference.h @@ -0,0 +1,193 @@ +/* + chronyd/chronyc - Programs for keeping computer clocks accurate. + + ********************************************************************** + * Copyright (C) Richard P. Curnow 1997-2002 + * Copyright (C) Miroslav Lichvar 2014 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + ********************************************************************** + + ======================================================================= + + This is the header file for the module that keeps track of the current + reference. + + */ + +#ifndef GOT_REFERENCE_H +#define GOT_REFERENCE_H + +#include "sysincl.h" + +#include "ntp.h" +#include "reports.h" + +/* Leap second handling modes */ +typedef enum { + REF_LeapModeSystem, + REF_LeapModeSlew, + REF_LeapModeStep, + REF_LeapModeIgnore, +} REF_LeapMode; + +/* Init function */ +extern void REF_Initialise(void); + +/* Fini function */ +extern void REF_Finalise(void); + +typedef enum { + REF_ModeNormal, + REF_ModeInitStepSlew, + REF_ModeUpdateOnce, + REF_ModePrintOnce, + REF_ModeIgnore, +} REF_Mode; + +/* Set reference update mode */ +extern void REF_SetMode(REF_Mode mode); + +/* Get reference update mode */ +extern REF_Mode REF_GetMode(void); + +/* Function type for handlers to be called back when mode ends */ +typedef void (*REF_ModeEndHandler)(int result); + +/* Set the handler for being notified of mode ending */ +extern void REF_SetModeEndHandler(REF_ModeEndHandler handler); + +/* Get leap second handling mode */ +extern REF_LeapMode REF_GetLeapMode(void); + +/* Function which takes a local cooked time and returns the estimated + time of the reference. It also returns the other parameters + required for forming the outgoing NTP packet. + + local_time is the cooked local time returned by the LCL module + + is_synchronised indicates whether we are synchronised to anything + at the moment. + + leap indicates the current leap status + + stratum is the stratum of this machine, when considered to be sync'd to the + reference + + ref_id is the reference_id of the source + + ref_time is the time at which the we last set the reference source up + + root_delay is the root delay of the sample we are using + + root_dispersion is the root dispersion of the sample we are using, with all the + skew etc added on. + + */ + +extern void REF_GetReferenceParams +( + struct timespec *local_time, + int *is_synchronised, + NTP_Leap *leap, + int *stratum, + uint32_t *ref_id, + struct timespec *ref_time, + double *root_delay, + double *root_dispersion +); + +/* Function called by the clock selection process to register a new + reference source and its parameters + + stratum is the stratum of the reference + + leap is the leap status read from the source + + ref_id is the reference id of the reference + + ref_time is the time at which the parameters are assumed to be + correct, in terms of local time + + frequency is the amount of local clock gain relative to the + reference per unit time interval of the local clock + + skew is the maximum estimated frequency error (so we are within + [frequency+-skew]) + + root_delay is the root delay of the sample we are using + + root_dispersion is the root dispersion of the sample we are using + + */ + +extern void REF_SetReference +( + int stratum, + NTP_Leap leap, + int combined_sources, + uint32_t ref_id, + IPAddr *ref_ip, + struct timespec *ref_time, + double offset, + double offset_sd, + double frequency, + double frequency_sd, + double skew, + double root_delay, + double root_dispersion +); + +extern void REF_SetManualReference +( + struct timespec *ref_time, + double offset, + double frequency, + double skew +); + +/* Mark the local clock as unsynchronised */ +extern void +REF_SetUnsynchronised(void); + +/* Return the current stratum of this host or 16 if the host is not + synchronised */ +extern int REF_GetOurStratum(void); + +/* Return stratum of the local reference if orphan mode is enabled */ +extern int REF_GetOrphanStratum(void); + +/* Return the current skew */ +extern double REF_GetSkew(void); + +/* Modify the setting for the maximum skew we are prepared to allow updates on (in ppm). */ +extern void REF_ModifyMaxupdateskew(double new_max_update_skew); + +/* Modify makestep settings */ +extern void REF_ModifyMakestep(int limit, double threshold); + +extern void REF_EnableLocal(int stratum, double distance, int orphan); +extern void REF_DisableLocal(void); + +/* Check if current raw or cooked time is close to a leap second + and is better to discard any measurements */ +extern int REF_IsLeapSecondClose(void); + +/* Return TAI-UTC offset corresponding to a time in UTC if available */ +extern int REF_GetTaiOffset(struct timespec *ts); + +extern void REF_GetTrackingReport(RPT_TrackingReport *rep); + +#endif /* GOT_REFERENCE_H */ |