The pool directive can be used to configure chronyd for a pool of NTP servers (e.g. pool.ntp.org). The name is expected to resolve to multiple addresses which change over time. On start, a source will be added for each resolved address. When a source from the pool is unreachable or marked as falseticker, chronyd will try to replace the source with a newly resolved address of the pool. The minimum interval between replacements is currently set to 244 seconds to avoid frequent DNS requests.
329 lines
4.9 KiB
C
329 lines
4.9 KiB
C
/*
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Miroslav Lichvar 2014
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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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Function replacements needed when optional features are disabled.
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*/
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#include "config.h"
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#include "clientlog.h"
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#include "cmdmon.h"
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#include "keys.h"
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#include "logging.h"
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#include "manual.h"
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#include "nameserv.h"
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#include "nameserv_async.h"
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#include "ntp_core.h"
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#include "ntp_io.h"
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#include "ntp_sources.h"
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#include "refclock.h"
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#ifndef FEAT_ASYNCDNS
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#define MAX_ADDRESSES 16
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/* This is a blocking implementation used when asynchronous resolving is not available */
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void
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DNS_Name2IPAddressAsync(const char *name, DNS_NameResolveHandler handler, void *anything)
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{
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IPAddr addrs[MAX_ADDRESSES];
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DNS_Status status;
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int i;
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status = DNS_Name2IPAddress(name, addrs, MAX_ADDRESSES);
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for (i = 0; status == DNS_Success && i < MAX_ADDRESSES &&
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addrs[i].family != IPADDR_UNSPEC; i++)
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;
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(handler)(status, i, addrs, anything);
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}
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#endif /* !FEAT_ASYNCDNS */
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#ifndef FEAT_CMDMON
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void
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CAM_Initialise(int family)
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{
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}
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void
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CAM_Finalise(void)
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{
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}
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int
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CAM_AddAccessRestriction(IPAddr *ip_addr, int subnet_bits, int allow, int all)
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{
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return 1;
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}
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void
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MNL_Initialise(void)
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{
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}
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void
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MNL_Finalise(void)
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{
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}
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#endif /* !FEAT_CMDMON */
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#ifndef FEAT_NTP
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void
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NCR_AddBroadcastDestination(IPAddr *addr, unsigned short port, int interval)
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{
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}
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void
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NCR_Initialise(void)
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{
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}
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void
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NCR_Finalise(void)
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{
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}
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int
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NCR_AddAccessRestriction(IPAddr *ip_addr, int subnet_bits, int allow, int all)
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{
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return 1;
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}
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int
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NCR_CheckAccessRestriction(IPAddr *ip_addr)
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{
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return 0;
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}
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void
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NIO_Initialise(int family)
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{
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}
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void
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NIO_Finalise(void)
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{
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}
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void
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NSR_Initialise(void)
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{
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}
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void
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NSR_Finalise(void)
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{
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}
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NSR_Status
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NSR_AddSource(NTP_Remote_Address *remote_addr, NTP_Source_Type type, SourceParameters *params)
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{
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return NSR_TooManySources;
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}
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void
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NSR_AddSourceByName(char *name, int port, int pool, NTP_Source_Type type, SourceParameters *params)
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{
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}
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NSR_Status
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NSR_RemoveSource(NTP_Remote_Address *remote_addr)
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{
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return NSR_NoSuchSource;
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}
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void
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NSR_RemoveAllSources(void)
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{
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}
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void
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NSR_HandleBadSource(IPAddr *address)
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{
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}
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void
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NSR_SetSourceResolvingEndHandler(NSR_SourceResolvingEndHandler handler)
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{
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if (handler)
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(handler)();
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}
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void
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NSR_ResolveSources(void)
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{
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}
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void NSR_StartSources(void)
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{
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}
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void NSR_AutoStartSources(void)
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{
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}
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int
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NSR_InitiateSampleBurst(int n_good_samples, int n_total_samples,
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IPAddr *mask, IPAddr *address)
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{
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return 0;
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}
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int
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NSR_TakeSourcesOnline(IPAddr *mask, IPAddr *address)
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{
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return 0;
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}
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int
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NSR_TakeSourcesOffline(IPAddr *mask, IPAddr *address)
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{
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return 0;
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}
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int
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NSR_ModifyMinpoll(IPAddr *address, int new_minpoll)
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{
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return 0;
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}
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int
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NSR_ModifyMaxpoll(IPAddr *address, int new_maxpoll)
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{
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return 0;
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}
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int
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NSR_ModifyMaxdelay(IPAddr *address, double new_max_delay)
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{
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return 0;
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}
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int
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NSR_ModifyMaxdelayratio(IPAddr *address, double new_max_delay_ratio)
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{
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return 0;
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}
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int
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NSR_ModifyMaxdelaydevratio(IPAddr *address, double new_max_delay_dev_ratio)
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{
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return 0;
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}
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int
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NSR_ModifyMinstratum(IPAddr *address, int new_min_stratum)
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{
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return 0;
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}
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int
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NSR_ModifyPolltarget(IPAddr *address, int new_poll_target)
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{
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return 0;
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}
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void
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NSR_ReportSource(RPT_SourceReport *report, struct timeval *now)
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{
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memset(report, 0, sizeof (*report));
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}
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void
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NSR_GetActivityReport(RPT_ActivityReport *report)
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{
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memset(report, 0, sizeof (*report));
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}
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#ifndef FEAT_CMDMON
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void
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CLG_Initialise(void)
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{
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}
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void
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CLG_Finalise(void)
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{
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}
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void
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DNS_SetAddressFamily(int family)
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{
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}
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DNS_Status
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DNS_Name2IPAddress(const char *name, IPAddr *ip_addrs, int max_addrs)
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{
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return DNS_Failure;
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}
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void
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KEY_Initialise(void)
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{
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}
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void
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KEY_Finalise(void)
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{
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}
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#endif /* !FEAT_CMDMON */
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#endif /* !FEAT_NTP */
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#ifndef FEAT_REFCLOCK
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void
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RCL_Initialise(void)
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{
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}
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void
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RCL_Finalise(void)
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{
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}
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int
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RCL_AddRefclock(RefclockParameters *params)
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{
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return 0;
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}
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void
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RCL_StartRefclocks(void)
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{
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}
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void
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RCL_ReportSource(RPT_SourceReport *report, struct timeval *now)
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{
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memset(report, 0, sizeof (*report));
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}
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#endif /* !FEAT_REFCLOCK */
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