bc33e1cda1
When the server clock was updated between saving of the RX timestamp and updating the TX timestamp, a client using interleaved mode with the four timestamps which minimize error in measured delay (e.g. chrony) had the server clock adjustment included in the measured delay, which could disrupt the sample filtering and weighting. Add a handler to track the slew epoch and remember the last offset. Undo the adjustment in TX timestamps which have their RX timestamp in the previous epoch to fix the delay observed by the clients. If an unknown clock step is detected, drop all timestamps.
63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
/*
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Richard P. Curnow 1997-2003
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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**********************************************************************
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=======================================================================
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This module contains facilities for logging access by clients.
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*/
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#ifndef GOT_CLIENTLOG_H
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#define GOT_CLIENTLOG_H
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#include "sysincl.h"
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#include "reports.h"
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typedef enum {
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CLG_NTP = 0,
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CLG_NTSKE,
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CLG_CMDMON,
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} CLG_Service;
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extern void CLG_Initialise(void);
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extern void CLG_Finalise(void);
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extern int CLG_GetClientIndex(IPAddr *client);
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extern int CLG_LogServiceAccess(CLG_Service service, IPAddr *client, struct timespec *now);
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extern int CLG_LimitServiceRate(CLG_Service service, int index);
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extern void CLG_LogAuthNtpRequest(void);
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extern int CLG_GetNtpMinPoll(void);
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/* Functions to save and retrieve timestamps for server interleaved mode */
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extern void CLG_SaveNtpTimestamps(NTP_int64 *rx_ts, struct timespec *tx_ts);
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extern void CLG_UndoNtpTxTimestampSlew(NTP_int64 *rx_ts, struct timespec *tx_ts);
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extern void CLG_UpdateNtpTxTimestamp(NTP_int64 *rx_ts, struct timespec *tx_ts);
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extern int CLG_GetNtpTxTimestamp(NTP_int64 *rx_ts, struct timespec *tx_ts);
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extern void CLG_DisableNtpTimestamps(NTP_int64 *rx_ts);
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/* And some reporting functions, for use by chronyc. */
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extern int CLG_GetNumberOfIndices(void);
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extern int CLG_GetClientAccessReportByIndex(int index, int reset, uint32_t min_hits,
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RPT_ClientAccessByIndex_Report *report,
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struct timespec *now);
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extern void CLG_GetServerStatsReport(RPT_ServerStatsReport *report);
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#endif /* GOT_CLIENTLOG_H */
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