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ntp: support pools

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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.
This commit is contained in:
Miroslav Lichvar
2014-11-03 11:16:13 +01:00
parent 29c1df4610
commit c743ecbf50
6 changed files with 242 additions and 40 deletions
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7
stubs.c
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@@ -149,7 +149,7 @@ NSR_AddSource(NTP_Remote_Address *remote_addr, NTP_Source_Type type, SourceParam
}
void
NSR_AddUnresolvedSource(char *name, int port, NTP_Source_Type type, SourceParameters *params)
NSR_AddSourceByName(char *name, int port, int pool, NTP_Source_Type type, SourceParameters *params)
{
}
@@ -164,6 +164,11 @@ NSR_RemoveAllSources(void)
{
}
void
NSR_HandleBadSource(IPAddr *address)
{
}
void
NSR_SetSourceResolvingEndHandler(NSR_SourceResolvingEndHandler handler)
{