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ntp: suggest clients to increase their polling interval

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When the poll value in a client request is smaller than the server's NTP
rate limiting interval, set poll in the response to the rate limiting
interval to suggest the client to increase its polling interval.

This follows ntpd as a server. No current client implementation seems to
be increasing its interval by the poll, but it may change in the future.
This commit is contained in:
Miroslav Lichvar
2017-06-16 12:16:17 +02:00
parent c5735ebfe9
commit 018a1c42b0
3 changed files with 21 additions and 2 deletions
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1
clientlog.h
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@@ -39,6 +39,7 @@ extern int CLG_LogCommandAccess(IPAddr *client, struct timespec *now);
extern int CLG_LimitNTPResponseRate(int index);
extern int CLG_LimitCommandResponseRate(int index);
extern void CLG_GetNtpTimestamps(int index, NTP_int64 **rx_ts, NTP_int64 **tx_ts);
extern int CLG_GetNtpMinPoll(void);
/* And some reporting functions, for use by chronyc. */