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Fix delta calculation with extreme frequency offsets

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This should prevent chronyd from getting stuck and refusing new samples
due to failing test4 when the current measured frequency offset is close
to 1.0. That can happen when the system clock is stepped forward behind
chronyd's back.
This commit is contained in:
Miroslav Lichvar
2013-03-08 13:54:10 +01:00
parent b261693095
commit 0bb772c575
1 changed files with 1 additions and 1 deletions
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ntp_core.c
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@@ -793,7 +793,7 @@ receive_packet(NTP_Packet *message, struct timeval *now, double now_err, NCR_Ins
assuming worst case frequency error between us and the other
source */
delta = local_interval - remote_interval / (1.0 - source_freq_lo);
delta = local_interval - remote_interval * (1.0 + source_freq_lo);
/* Calculate theta. Following the NTP definition, this is negative
if we are fast of the remote source. */