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Author SHA1 Message Date
Miroslav Lichvar
50f99ec5f4 conf: add nocrossts option to hwtimestamp directive 
This option disables the use of the PTP_SYS_OFFSET_PRECISE ioctl.
 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
31b6a14444 sys_linux: add support for PTP_SYS_OFFSET_PRECISE 
This is for hardware that can precisely cross timestamp the PHC with the
system clock.
 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
9df4d36157 refclock_phc: use sys_linux code for reading PHC 
This drops support for non-ioctl reading of PHC.
 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
b70f0b674f ntp: move PHC-specific code to sys_linux 
This will allow sharing of the code with the PHC refclock driver.
 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
510784077f conf: add minpoll option to hwtimestamp directive 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
9800e397fb hwclock: make minimum sampling separation configurable 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
1436d9961f conf: add precision option to hwtimestamp directive 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
98f5d05925 ntp: include precision of PHC readings in their selection 
Include a fixed non-zero precision (100 nanosecond) in the selection of
PHC readings.
 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
7a937c7652 conf: return hwtimestamp data in struct 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
b198d76676 ntp: include precision in maxdelay test 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
97d4203354 ntp: adapt sampling separation for short polling intervals 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
beaaaad162 ntp: allow sub-second polling intervals 
Change the minimum minpoll to -4, but keep the minimum maxpoll at 0 in
order to not make it too easy to flood distant servers.
 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
4e78975909 ntp: use current poll when backing off on KoD RATE 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
99147ed8f2 ntp: rename maxdelay constants 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
dec0d3bfc2 ntp: reset ntpdata report on address change 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
cd84c99e70 examples: improve chronyd.service 2017-01-23 15:58:55 +01:00
Miroslav Lichvar
d5c507975c doc: update README 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
b4235abd36 update copyright years 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
1966085a97 test: add ntp_core unit test 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
e31e7af48f test: make 119-smoothtime more reliable 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
adb9123fc3 test: extend util unit test 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
b0f7efd59e util: handle zero in conversion of NTP timestamps 
Handle zero NTP timestamp in UTI_Ntp64ToTimespec() as a special value to
make it symmetric with UTI_TimespecToNtp64(). This is needed since
commit d75f6830f1, in which a timestamp is
converted back and forth without checking for zero.

It also makes zero NTP timestamps more apparent in debug output.
 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
e28dfada8c rtc: check for backward RTC steps 
When accumulating a new sample, check if the new RTC time is newer the
last sample time. If it is not, discard all previous samples, assuming
something has stepped the RTC, or it's a broken RTC/driver.
 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
ac0b28cce6 sourcestats: align sample time used for source report 
This reduces leak of sample times (and receive timestamps which are
related to sample times), which could be useful in off-path attacks on
unauthenticated symmetric interleaved mode.
 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
48b16ae66c local: add assertion for precision 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
061579ec28 ntp: don't send packets with RX equal to TX 
Before sending an NTP packet, check whether the TX timestamp is not
equal to the RX timestamp. If it is, generate a new TX timestamp and try
again. This is extremely unlikely to happen in normal operation, but it
is needed for reliable detection of the interleaved mode.
 2017-01-12 16:34:28 +01:00
Miroslav Lichvar
f2f834e7e7 ntp: limit maxdelay parameters 2017-01-12 16:34:27 +01:00
Miroslav Lichvar
a7802e9a76 fix some coverity warnings 2017-01-12 16:34:27 +01:00
Miroslav Lichvar
8f7ab95ff0 doc: update NEWS 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
042c670747 doc: improve chrony.conf man page 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
cacbe9976f ntp: add options for compensating HW timestamping errors 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
8efec1d640 ntp: add sanity check for HW timestamps 
Accept HW timestamp only if it doesn't differ from the kernel/daemon
timestamp by more than one second.
 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
c44d282f0b ntp: ignore zero HW timestamps 
Apparently, zero HW timestamps are possible with buggy drivers/HW.
 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
4432f29bd2 sources: try to replace jittery sources 
Similarly to falsetickers, distant, and unreachable sources, try to
replace sources that have jitter larger than maxjitter.
 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
5fee3ed5e9 client: print refid also as string in ntpdata output 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
b76ea64263 ntp: log warning when KoD RATE is received in non-burst mode 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
ed904f08a4 hwclock: return timestamp error 
For now, when converting a raw timestamp, return error of the last
sample as the maximum error of the timestamp. This is needed to include
the PHC reading delay in the NTP dispersion.
 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
96cc80ffc8 ntp: improve dispersion calculation 
Instead of adding precision (sum of the local and remote precision) to
the TX and RX timestamp error, include only the maximum.
 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
ab99373cfc conf: change default rate limiting parameters 
Change the default NTP rate limiting leak to 2 (25%). Change the default
command rate limiting interval to -4 (16 packets per second) and burst
to 8, so the interval is the only difference between NTP and command
rate limiting defaults.
 2017-01-06 13:12:19 +01:00
Miroslav Lichvar
dbfb49384b clientlog: disable NTP response rate limiting by default 
This reverts commit 50022e9286.

Testing showed that ntpd as an NTP client performs poorly when it's
getting only 25% of responses. At least for now, disable rate limiting
by default again.
 2017-01-06 13:12:18 +01:00
Miroslav Lichvar
14bb9f29a3 ntp: calculate delay relative to local frequency 
This should be more accurate as local frequency is usually
combined from multiple sources. This is a partial revert of commit
23a4e8b38d.
 2017-01-06 13:12:18 +01:00
Miroslav Lichvar
16519ee2cc doc: update NEWS 2016-12-15 13:47:41 +01:00
Miroslav Lichvar
50022e9286 clientlog: enable NTP response rate limiting by default 
Change the default interval of both NTP and command rate limiting to -10
(1024 packets per second) and the burst to 16. The default NTP leak is 2
(rate limiting is enabled by default) and the default command leak is 0
(rate limiting is disabled by default).
 2016-12-15 13:47:41 +01:00
Miroslav Lichvar
5059019535 clientlog: randomize alignment of log timestamps 2016-12-15 13:47:41 +01:00
Miroslav Lichvar
c6a38f5069 clientlog: allow very short rate limiting intervals 
Support negative token shift to allow coarse rate limiting with
intervals down to -19.
 2016-12-15 13:47:41 +01:00
Miroslav Lichvar
11ed197663 configure: don't use recvmmsg() on FreeBSD 
Don't try recvmmsg() on FreeBSD, at least for now. It is broken on
FreeBSD 11.0 and it's just a wrapper around recvmsg().
 2016-12-15 13:47:41 +01:00
Miroslav Lichvar
5634e6b963 doc: improve hwtimestamp description 2016-12-14 16:19:35 +01:00
Miroslav Lichvar
db312a5ff6 ntp: allow wildcard in hwtimestamp directive 
If "*" was specified, use getifaddrs() to get a list of all interfaces,
and try to enable HW timestamping on all of them.
 2016-12-14 16:19:35 +01:00
Miroslav Lichvar
88c31b3785 client: improve ntpdata output 2016-12-14 16:19:35 +01:00
Miroslav Lichvar
967f3e4f77 client: don't require address in ntpdata command 
If no address is specified, use the SOURCE_DATA command to get addresses
of NTP sources, and request NTP_DATA for all of them.
 2016-12-14 16:19:35 +01:00