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ntp: fix RX error added to dispersion in interleaved mode

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This commit is contained in:
Miroslav Lichvar
2016-12-07 16:31:56 +01:00
parent 8bbb8fa062
commit e62a39cafe
1 changed files with 4 additions and 1 deletions
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5
ntp_core.c
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@@ -1380,6 +1380,7 @@ receive_packet(NCR_Instance inst, NTP_Local_Address *local_addr,
/* These are the timespec equivalents of the remote and local epochs */
struct timespec remote_receive, remote_transmit, prev_remote_receive;
struct timespec local_average, remote_average;
double rx_ts_err;
precision = LCL_GetSysPrecisionAsQuantum() +
UTI_Log2ToDouble(message->precision);
@@ -1398,6 +1399,7 @@ receive_packet(NCR_Instance inst, NTP_Local_Address *local_addr,
&local_average, &local_interval);
server_interval = UTI_DiffTimespecsToDouble(&remote_transmit,
&prev_remote_receive);
rx_ts_err = inst->local_rx.err;
sample_rx_tss = inst->local_rx.source;
} else {
UTI_AverageDiffTimespecs(&remote_receive, &remote_transmit,
@@ -1405,6 +1407,7 @@ receive_packet(NCR_Instance inst, NTP_Local_Address *local_addr,
UTI_AverageDiffTimespecs(&inst->local_tx.ts, &rx_ts->ts,
&local_average, &local_interval);
server_interval = remote_interval;
rx_ts_err = rx_ts->err;
sample_rx_tss = rx_ts->source;
}
@@ -1435,7 +1438,7 @@ receive_packet(NCR_Instance inst, NTP_Local_Address *local_addr,
skew = (source_freq_hi - source_freq_lo) / 2.0;
/* and then calculate peer dispersion */
dispersion = precision + rx_ts->err + skew * fabs(local_interval);
dispersion = precision + rx_ts_err + skew * fabs(local_interval);
/* Additional tests required to pass before accumulating the sample */