From 763b5e2c4bed507e0fa34ca2b7cb4f15a136cb82 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 19:35:01 +0200 Subject: Adding upstream version 4.0. Signed-off-by: Daniel Baumann --- COPYING | 339 ++ FAQ | 675 ++++ INSTALL | 165 + Makefile.in | 139 + NEWS | 908 +++++ README | 155 + addressing.h | 67 + addrfilt.c | 405 ++ addrfilt.h | 80 + array.c | 130 + array.h | 56 + candm.h | 816 ++++ client.c | 3604 +++++++++++++++++ clientlog.c | 720 ++++ clientlog.h | 57 + cmac.h | 48 + cmac_nettle.c | 117 + cmdmon.c | 1787 +++++++++ cmdmon.h | 40 + cmdparse.c | 296 ++ cmdparse.h | 54 + conf.c | 2594 ++++++++++++ conf.h | 167 + configure | 1081 +++++ contrib/andrew_bishop_1 | 114 + contrib/andrew_bishop_2 | 95 + contrib/bryan_christianson_1/README.txt | 103 + contrib/bryan_christianson_1/chronylogrotate.sh | 58 + .../org.tuxfamily.chronyc.plist | 22 + .../org.tuxfamily.chronyd.plist | 19 + contrib/erik_bryer_1 | 65 + contrib/ken_gillett_1 | 100 + contrib/stephan_boettcher_1 | 162 + contrib/wolfgang_weisselberg1 | 118 + doc/Makefile.in | 76 + doc/chrony.conf.adoc | 2854 +++++++++++++ doc/chrony.conf.man.in | 4216 ++++++++++++++++++++ doc/chronyc.adoc | 1466 +++++++ doc/chronyc.man.in | 2522 ++++++++++++ doc/chronyd.adoc | 211 + doc/chronyd.man.in | 253 ++ doc/faq.adoc | 676 ++++ doc/installation.adoc | 200 + examples/chrony-wait.service | 20 + examples/chrony.conf.example1 | 12 + examples/chrony.conf.example2 | 47 + examples/chrony.conf.example3 | 334 ++ examples/chrony.keys.example | 13 + examples/chrony.logrotate | 8 + examples/chrony.nm-dispatcher.dhcp | 43 + examples/chrony.nm-dispatcher.onoffline | 17 + examples/chronyd.service | 18 + getdate.c | 2813 +++++++++++++ getdate.h | 28 + getdate.y | 1044 +++++ hash.h | 56 + hash_intmd5.c | 71 + hash_nettle.c | 121 + hash_nss.c | 111 + hash_tomcrypt.c | 123 + hwclock.c | 227 ++ hwclock.h | 49 + keys.c | 436 ++ keys.h | 47 + local.c | 744 ++++ local.h | 221 + localp.h | 74 + logging.c | 352 ++ logging.h | 129 + main.c | 678 ++++ main.h | 35 + manual.c | 332 ++ manual.h | 46 + md5.c | 322 ++ md5.h | 56 + memory.c | 93 + memory.h | 45 + nameserv.c | 211 + nameserv.h | 52 + nameserv_async.c | 130 + nameserv_async.h | 40 + ntp.h | 158 + ntp_auth.c | 494 +++ ntp_auth.h | 87 + ntp_core.c | 2628 ++++++++++++ ntp_core.h | 144 + ntp_ext.c | 192 + ntp_ext.h | 43 + ntp_io.c | 483 +++ ntp_io.h | 66 + ntp_io_linux.c | 814 ++++ ntp_io_linux.h | 47 + ntp_signd.c | 341 ++ ntp_signd.h | 42 + ntp_sources.c | 1345 +++++++ ntp_sources.h | 151 + nts_ke.h | 81 + nts_ke_client.c | 402 ++ nts_ke_client.h | 56 + nts_ke_server.c | 964 +++++ nts_ke_server.h | 49 + nts_ke_session.c | 875 ++++ nts_ke_session.h | 87 + nts_ntp.h | 41 + nts_ntp_auth.c | 183 + nts_ntp_auth.h | 43 + nts_ntp_client.c | 703 ++++ nts_ntp_client.h | 51 + nts_ntp_server.c | 281 ++ nts_ntp_server.h | 40 + pktlength.c | 218 + pktlength.h | 40 + privops.c | 694 ++++ privops.h | 77 + refclock.c | 769 ++++ refclock.h | 84 + refclock_phc.c | 179 + refclock_pps.c | 172 + refclock_shm.c | 136 + refclock_sock.c | 131 + reference.c | 1403 +++++++ reference.h | 196 + regress.c | 704 ++++ regress.h | 137 + reports.h | 202 + rtc.c | 240 ++ rtc.h | 45 + rtc_linux.c | 1087 +++++ rtc_linux.h | 45 + samplefilt.c | 452 +++ samplefilt.h | 49 + sched.c | 843 ++++ sched.h | 92 + siv.h | 70 + siv_gnutls.c | 256 ++ siv_nettle.c | 156 + siv_nettle_int.c | 452 +++ smooth.c | 368 ++ smooth.h | 48 + socket.c | 1612 ++++++++ socket.h | 147 + sources.c | 1634 ++++++++ sources.h | 140 + sourcestats.c | 1048 +++++ sourcestats.h | 136 + srcparams.h | 88 + stubs.c | 566 +++ sys.c | 150 + sys.h | 53 + sys_generic.c | 424 ++ sys_generic.h | 46 + sys_linux.c | 1001 +++++ sys_linux.h | 52 + sys_macosx.c | 516 +++ sys_macosx.h | 40 + sys_netbsd.c | 158 + sys_netbsd.h | 39 + sys_null.c | 140 + sys_null.h | 34 + sys_posix.c | 109 + sys_posix.h | 36 + sys_solaris.c | 64 + sys_solaris.h | 38 + sys_timex.c | 283 ++ sys_timex.h | 48 + sysincl.h | 73 + tempcomp.c | 176 + tempcomp.h | 29 + test/compilation/001-features | 36 + test/compilation/002-scanbuild | 15 + test/compilation/003-sanitizers | 88 + test/kernel/Makefile | 7 + test/kernel/adjtime.c | 185 + test/kernel/ntpadjtime.c | 75 + test/simulation/001-defaults | 13 + test/simulation/002-largenetwork | 22 + test/simulation/003-largefreqoffset | 19 + test/simulation/004-largetimeoffset | 18 + test/simulation/005-externalstep | 46 + test/simulation/006-largejitter | 21 + test/simulation/007-largewander | 20 + test/simulation/008-ntpera | 40 + test/simulation/009-sourceselection | 40 + test/simulation/010-multrecv | 17 + test/simulation/011-asymjitter | 18 + test/simulation/012-daemonts | 15 + test/simulation/013-nameserv | 15 + test/simulation/101-poll | 30 + test/simulation/102-iburst | 23 + test/simulation/103-initstepslew | 32 + test/simulation/104-driftfile | 23 + test/simulation/105-ntpauth | 96 + test/simulation/106-refclock | 34 + test/simulation/107-allowdeny | 48 + test/simulation/108-peer | 54 + test/simulation/109-makestep | 41 + test/simulation/110-chronyc | 226 ++ test/simulation/111-knownclient | 17 + test/simulation/112-port | 57 + test/simulation/113-leapsecond | 61 + test/simulation/114-presend | 25 + test/simulation/115-cmdmontime | 24 + test/simulation/116-minsources | 24 + test/simulation/117-fallbackdrift | 24 + test/simulation/118-maxdelay | 28 + test/simulation/119-smoothtime | 82 + test/simulation/120-selectoptions | 92 + test/simulation/121-orphan | 26 + test/simulation/122-xleave | 55 + test/simulation/123-mindelay | 27 + test/simulation/124-tai | 45 + test/simulation/125-packetloss | 29 + test/simulation/126-burst | 45 + test/simulation/127-filter | 19 + test/simulation/128-nocontrol | 27 + test/simulation/129-reload | 26 + test/simulation/130-quit | 31 + test/simulation/131-maxchange | 20 + test/simulation/132-logchange | 21 + test/simulation/133-hwtimestamp | 39 + test/simulation/134-log | 33 + test/simulation/135-ratelimit | 18 + test/simulation/136-broadcast | 16 + test/simulation/137-pool | 49 + test/simulation/138-syncloop | 34 + test/simulation/139-nts | 173 + test/simulation/140-noclientlog | 21 + test/simulation/201-freqaccumulation | 35 + test/simulation/202-prefer | 21 + test/simulation/README | 11 + test/simulation/run | 90 + test/simulation/test.common | 516 +++ test/system/001-minimal | 13 + test/system/002-extended | 13 + test/system/003-memlock | 15 + test/system/004-priority | 15 + test/system/005-scfilter | 17 + test/system/006-privdrop | 17 + test/system/007-cmdmon | 157 + test/system/008-confload | 75 + test/system/009-binddevice | 24 + test/system/100-clockupdate | 30 + test/system/101-rtc | 19 + test/system/102-hwtimestamp | 28 + test/system/103-refclock | 19 + test/system/104-systemdirs | 19 + test/system/105-nts | 72 + test/system/run | 64 + test/system/test.common | 338 ++ test/unit/Makefile.in | 48 + test/unit/addrfilt.c | 83 + test/unit/clientlog.c | 94 + test/unit/cmac.c | 109 + test/unit/hash.c | 124 + test/unit/hwclock.c | 84 + test/unit/keys.c | 173 + test/unit/ntp_auth.c | 305 ++ test/unit/ntp_core.c | 527 +++ test/unit/ntp_core.keys | 8 + test/unit/ntp_ext.c | 167 + test/unit/ntp_sources.c | 112 + test/unit/nts_ke.crt | 8 + test/unit/nts_ke.key | 25 + test/unit/nts_ke_client.c | 144 + test/unit/nts_ke_server.c | 230 ++ test/unit/nts_ke_session.c | 218 + test/unit/nts_ntp_auth.c | 112 + test/unit/nts_ntp_client.c | 284 ++ test/unit/nts_ntp_server.c | 176 + test/unit/regress.c | 119 + test/unit/samplefilt.c | 118 + test/unit/siv.c | 321 ++ test/unit/smooth.c | 63 + test/unit/sources.c | 243 ++ test/unit/test.c | 187 + test/unit/test.h | 55 + test/unit/util.c | 372 ++ util.c | 1485 +++++++ util.h | 247 ++ version.txt | 1 + 280 files changed, 76499 insertions(+) create mode 100644 COPYING create mode 100644 FAQ create mode 100644 INSTALL create mode 100644 Makefile.in create mode 100644 NEWS create mode 100644 README create mode 100644 addressing.h create mode 100644 addrfilt.c create mode 100644 addrfilt.h create mode 100644 array.c create mode 100644 array.h create mode 100644 candm.h create mode 100644 client.c create mode 100644 clientlog.c create mode 100644 clientlog.h create mode 100644 cmac.h create mode 100644 cmac_nettle.c create mode 100644 cmdmon.c create mode 100644 cmdmon.h create mode 100644 cmdparse.c create mode 100644 cmdparse.h create mode 100644 conf.c create mode 100644 conf.h create mode 100755 configure create mode 100644 contrib/andrew_bishop_1 create mode 100644 contrib/andrew_bishop_2 create mode 100644 contrib/bryan_christianson_1/README.txt create mode 100755 contrib/bryan_christianson_1/chronylogrotate.sh create mode 100644 contrib/bryan_christianson_1/org.tuxfamily.chronyc.plist create mode 100644 contrib/bryan_christianson_1/org.tuxfamily.chronyd.plist create mode 100644 contrib/erik_bryer_1 create mode 100644 contrib/ken_gillett_1 create mode 100644 contrib/stephan_boettcher_1 create mode 100644 contrib/wolfgang_weisselberg1 create mode 100644 doc/Makefile.in create mode 100644 doc/chrony.conf.adoc create mode 100644 doc/chrony.conf.man.in create mode 100644 doc/chronyc.adoc create mode 100644 doc/chronyc.man.in create mode 100644 doc/chronyd.adoc create mode 100644 doc/chronyd.man.in create mode 100644 doc/faq.adoc create mode 100644 doc/installation.adoc create mode 100644 examples/chrony-wait.service create mode 100644 examples/chrony.conf.example1 create mode 100644 examples/chrony.conf.example2 create mode 100644 examples/chrony.conf.example3 create mode 100644 examples/chrony.keys.example create mode 100644 examples/chrony.logrotate create mode 100644 examples/chrony.nm-dispatcher.dhcp create mode 100644 examples/chrony.nm-dispatcher.onoffline create mode 100644 examples/chronyd.service create mode 100644 getdate.c create mode 100644 getdate.h create mode 100644 getdate.y create mode 100644 hash.h create mode 100644 hash_intmd5.c create mode 100644 hash_nettle.c create mode 100644 hash_nss.c create mode 100644 hash_tomcrypt.c create mode 100644 hwclock.c create mode 100644 hwclock.h create mode 100644 keys.c create mode 100644 keys.h create mode 100644 local.c create mode 100644 local.h create mode 100644 localp.h create mode 100644 logging.c create mode 100644 logging.h create mode 100644 main.c create mode 100644 main.h create mode 100644 manual.c create mode 100644 manual.h create mode 100644 md5.c create mode 100644 md5.h create mode 100644 memory.c create mode 100644 memory.h create mode 100644 nameserv.c create mode 100644 nameserv.h create mode 100644 nameserv_async.c create mode 100644 nameserv_async.h create mode 100644 ntp.h create mode 100644 ntp_auth.c create mode 100644 ntp_auth.h create mode 100644 ntp_core.c create mode 100644 ntp_core.h create mode 100644 ntp_ext.c create mode 100644 ntp_ext.h create mode 100644 ntp_io.c create mode 100644 ntp_io.h create mode 100644 ntp_io_linux.c create mode 100644 ntp_io_linux.h create mode 100644 ntp_signd.c create mode 100644 ntp_signd.h create mode 100644 ntp_sources.c create mode 100644 ntp_sources.h create mode 100644 nts_ke.h create mode 100644 nts_ke_client.c create mode 100644 nts_ke_client.h create mode 100644 nts_ke_server.c create mode 100644 nts_ke_server.h create mode 100644 nts_ke_session.c create mode 100644 nts_ke_session.h create mode 100644 nts_ntp.h create mode 100644 nts_ntp_auth.c create mode 100644 nts_ntp_auth.h create mode 100644 nts_ntp_client.c create mode 100644 nts_ntp_client.h create mode 100644 nts_ntp_server.c create mode 100644 nts_ntp_server.h create mode 100644 pktlength.c create mode 100644 pktlength.h create mode 100644 privops.c create mode 100644 privops.h create mode 100644 refclock.c create mode 100644 refclock.h create mode 100644 refclock_phc.c create mode 100644 refclock_pps.c create mode 100644 refclock_shm.c create mode 100644 refclock_sock.c create mode 100644 reference.c create mode 100644 reference.h create mode 100644 regress.c create mode 100644 regress.h create mode 100644 reports.h create mode 100644 rtc.c create mode 100644 rtc.h create mode 100644 rtc_linux.c create mode 100644 rtc_linux.h create mode 100644 samplefilt.c create mode 100644 samplefilt.h create mode 100644 sched.c create mode 100644 sched.h create mode 100644 siv.h create mode 100644 siv_gnutls.c create mode 100644 siv_nettle.c create mode 100644 siv_nettle_int.c create mode 100644 smooth.c create mode 100644 smooth.h create mode 100644 socket.c create mode 100644 socket.h create mode 100644 sources.c create mode 100644 sources.h create mode 100644 sourcestats.c create mode 100644 sourcestats.h create mode 100644 srcparams.h create mode 100644 stubs.c create mode 100644 sys.c create mode 100644 sys.h create mode 100644 sys_generic.c create mode 100644 sys_generic.h create mode 100644 sys_linux.c create mode 100644 sys_linux.h create mode 100644 sys_macosx.c create mode 100644 sys_macosx.h create mode 100644 sys_netbsd.c create mode 100644 sys_netbsd.h create mode 100644 sys_null.c create mode 100644 sys_null.h create mode 100644 sys_posix.c create mode 100644 sys_posix.h create mode 100644 sys_solaris.c create mode 100644 sys_solaris.h create mode 100644 sys_timex.c create mode 100644 sys_timex.h create mode 100644 sysincl.h create mode 100644 tempcomp.c create mode 100644 tempcomp.h create mode 100755 test/compilation/001-features create mode 100755 test/compilation/002-scanbuild create mode 100755 test/compilation/003-sanitizers create mode 100644 test/kernel/Makefile create mode 100644 test/kernel/adjtime.c create mode 100644 test/kernel/ntpadjtime.c create mode 100755 test/simulation/001-defaults create mode 100755 test/simulation/002-largenetwork create mode 100755 test/simulation/003-largefreqoffset create mode 100755 test/simulation/004-largetimeoffset create mode 100755 test/simulation/005-externalstep create mode 100755 test/simulation/006-largejitter create mode 100755 test/simulation/007-largewander create mode 100755 test/simulation/008-ntpera create mode 100755 test/simulation/009-sourceselection create mode 100755 test/simulation/010-multrecv create mode 100755 test/simulation/011-asymjitter create mode 100755 test/simulation/012-daemonts create mode 100755 test/simulation/013-nameserv create mode 100755 test/simulation/101-poll create mode 100755 test/simulation/102-iburst create mode 100755 test/simulation/103-initstepslew create mode 100755 test/simulation/104-driftfile create mode 100755 test/simulation/105-ntpauth create mode 100755 test/simulation/106-refclock create mode 100755 test/simulation/107-allowdeny create mode 100755 test/simulation/108-peer create mode 100755 test/simulation/109-makestep create mode 100755 test/simulation/110-chronyc create mode 100755 test/simulation/111-knownclient create mode 100755 test/simulation/112-port create mode 100755 test/simulation/113-leapsecond create mode 100755 test/simulation/114-presend create mode 100755 test/simulation/115-cmdmontime create mode 100755 test/simulation/116-minsources create mode 100755 test/simulation/117-fallbackdrift create mode 100755 test/simulation/118-maxdelay create mode 100755 test/simulation/119-smoothtime create mode 100755 test/simulation/120-selectoptions create mode 100755 test/simulation/121-orphan create mode 100755 test/simulation/122-xleave create mode 100755 test/simulation/123-mindelay create mode 100755 test/simulation/124-tai create mode 100755 test/simulation/125-packetloss create mode 100755 test/simulation/126-burst create mode 100755 test/simulation/127-filter create mode 100755 test/simulation/128-nocontrol create mode 100755 test/simulation/129-reload create mode 100755 test/simulation/130-quit create mode 100755 test/simulation/131-maxchange create mode 100755 test/simulation/132-logchange create mode 100755 test/simulation/133-hwtimestamp create mode 100755 test/simulation/134-log create mode 100755 test/simulation/135-ratelimit create mode 100755 test/simulation/136-broadcast create mode 100755 test/simulation/137-pool create mode 100755 test/simulation/138-syncloop create mode 100755 test/simulation/139-nts create mode 100755 test/simulation/140-noclientlog create mode 100755 test/simulation/201-freqaccumulation create mode 100755 test/simulation/202-prefer create mode 100644 test/simulation/README create mode 100755 test/simulation/run create mode 100644 test/simulation/test.common create mode 100755 test/system/001-minimal create mode 100755 test/system/002-extended create mode 100755 test/system/003-memlock create mode 100755 test/system/004-priority create mode 100755 test/system/005-scfilter create mode 100755 test/system/006-privdrop create mode 100755 test/system/007-cmdmon create mode 100755 test/system/008-confload create mode 100755 test/system/009-binddevice create mode 100755 test/system/100-clockupdate create mode 100755 test/system/101-rtc create mode 100755 test/system/102-hwtimestamp create mode 100755 test/system/103-refclock create mode 100755 test/system/104-systemdirs create mode 100755 test/system/105-nts create mode 100755 test/system/run create mode 100644 test/system/test.common create mode 100644 test/unit/Makefile.in create mode 100644 test/unit/addrfilt.c create mode 100644 test/unit/clientlog.c create mode 100644 test/unit/cmac.c create mode 100644 test/unit/hash.c create mode 100644 test/unit/hwclock.c create mode 100644 test/unit/keys.c create mode 100644 test/unit/ntp_auth.c create mode 100644 test/unit/ntp_core.c create mode 100644 test/unit/ntp_core.keys create mode 100644 test/unit/ntp_ext.c create mode 100644 test/unit/ntp_sources.c create mode 100644 test/unit/nts_ke.crt create mode 100644 test/unit/nts_ke.key create mode 100644 test/unit/nts_ke_client.c create mode 100644 test/unit/nts_ke_server.c create mode 100644 test/unit/nts_ke_session.c create mode 100644 test/unit/nts_ntp_auth.c create mode 100644 test/unit/nts_ntp_client.c create mode 100644 test/unit/nts_ntp_server.c create mode 100644 test/unit/regress.c create mode 100644 test/unit/samplefilt.c create mode 100644 test/unit/siv.c create mode 100644 test/unit/smooth.c create mode 100644 test/unit/sources.c create mode 100644 test/unit/test.c create mode 100644 test/unit/test.h create mode 100644 test/unit/util.c create mode 100644 util.c create mode 100644 util.h create mode 100644 version.txt diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..d511905 --- /dev/null +++ b/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/FAQ b/FAQ new file mode 100644 index 0000000..82912df --- /dev/null +++ b/FAQ @@ -0,0 +1,675 @@ +Frequently Asked Questions + +Table of Contents + + o 1. chrony compared to other programs + ? 1.1. How does chrony compare to ntpd? + o 2. Configuration issues + ? 2.1. What is the minimum recommended configuration for an NTP client? + ? 2.2. How do I make an NTP server? + ? 2.3. Should all computers on a LAN be clients of an external server? + ? 2.4. Must I specify servers by IP address if DNS is not available on + chronyd start? + ? 2.5. How can I make chronyd more secure? + ? 2.6. How can I improve the accuracy of the system clock with NTP + sources? + ? 2.7. Does chronyd have an ntpdate mode? + ? 2.8. Can chronyd be configured to control the clock like ntpd? + ? 2.9. Can NTP server be separated from NTP client? + ? 2.10. Should be a leap smear enabled on NTP server? + ? 2.11. Does chrony support PTP? + ? 2.12. What happened to the commandkey and generatecommandkey + directives? + o 3. Computer is not synchronising + ? 3.1. Behind a firewall? + ? 3.2. Are NTP servers specified with the offline option? + ? 3.3. Is chronyd allowed to step the system clock? + ? 3.4. Using a Windows NTP server? + ? 3.5. An unreachable source is selected? + ? 3.6. Does selected source drop new measurements? + ? 3.7. Using a PPS reference clock? + o 4. Issues with chronyc + ? 4.1. I keep getting the error 506 Cannot talk to daemon + ? 4.2. I keep getting the error 501 Not authorised + ? 4.3. What is the reference ID reported by the tracking command? + ? 4.4. Is the chronyc / chronyd protocol documented anywhere? + o 5. Real-time clock issues + ? 5.1. What is the real-time clock (RTC)? + ? 5.2. Does hwclock have to be disabled? + ? 5.3. I just keep getting the 513 RTC driver not running message + ? 5.4. I get Could not open /dev/rtc, Device or resource busy in my + syslog file + ? 5.5. What if my computer does not have an RTC or backup battery? + o 6. NTP-specific issues + ? 6.1. Can chronyd be driven from broadcast/multicast NTP servers? + ? 6.2. Can chronyd transmit broadcast NTP packets? + ? 6.3. Can chronyd keep the system clock a fixed offset away from real + time? + ? 6.4. What happens if the network connection is dropped without using + chronyc's offline command first? + ? 6.5. Why is an offset measured between two computers synchronised to + each another? + o 7. Operating systems + ? 7.1. Does chrony support Windows? + ? 7.2. Are there any plans to support Windows? + +1. chrony compared to other programs + +1.1. How does chrony compare to ntpd? + +chrony and ntpd are two different implementations of the Network Time Protocol +(NTP). + +chrony is a newer implementation, which was designed to work well in a wider +range of conditions. It can usually synchronise the system clock faster and +with better time accuracy. It has many features, but it does not implement some +of the less useful NTP modes like broadcast client or multicast server/client. + +If your computer is connected to the Internet only for few minutes at a time, +the network connection is often congested, you turn your computer off or +suspend it frequently, the clock is not very stable (e.g. there are rapid +changes in the temperature or it is a virtual machine), or you want to use NTP +on an isolated network with no hardware reference clocks in sight, chrony will +probably work better for you. + +For a more detailed comparison of features and performance, see the comparison +page on the chrony website. + +2. Configuration issues + +2.1. What is the minimum recommended configuration for an NTP client? + +First, the client needs to know which NTP servers it should ask for the current +time. They are specified by the server or pool directive. The pool directive +can be used for names that resolve to multiple addresses. For good reliability +the client should have at least three servers. The iburst option speeds up the +initial synchronisation. + +To stabilise the initial synchronisation on the next start, the estimated drift +of the system clock is saved to a file specified by the driftfile directive. + +If the system clock can be far from the true time after boot for any reason, +chronyd should be allowed to correct it quickly by stepping instead of slewing, +which would take a very long time. The makestep directive does that. + +In order to keep the real-time clock (RTC) close to the true time, so the +system time is reasonably close to the true time when it is initialised on the +next boot from the RTC, the rtcsync directive enables a mode in which the +system time is periodically copied to the RTC. It is supported on Linux and +macOS. + +If you want to use public NTP servers from the pool.ntp.org project, the +minimal chrony.conf file could be: + +pool pool.ntp.org iburst +driftfile /var/lib/chrony/drift +makestep 1 3 +rtcsync + +2.2. How do I make an NTP server? + +You need to add an allow directive to the chrony.conf file in order to open the +NTP port and allow chronyd to reply to client requests. allow with no specified +subnet allows access from all IPv4 and IPv6 addresses. + +2.3. Should all computers on a LAN be clients of an external server? + +It depends on the requirements. Usually, the best configuration is to make one +computer the server, with the others as clients of it. Add a local directive to +the server's chrony.conf file. This configuration will be better because + + o the load on the external connection is less + + o the load on the external NTP server(s) is less + + o if your external connection goes down, the computers on the LAN will + maintain a common time with each other. + +2.4. Must I specify servers by IP address if DNS is not available on chronyd +start? + +No, chronyd will keep trying to resolve the names specified by the server, +pool, and peer directives in an increasing interval until it succeeds. The +online command can be issued from chronyc to force chronyd to try to resolve +the names immediately. + +2.5. How can I make chronyd more secure? + +If you do not need to use chronyc, or you want to run chronyc only under the +root or chrony user (which can access chronyd through a Unix domain socket), +you can disable the IPv4 and IPv6 command sockets (by default listening on +localhost) by adding cmdport 0 to the configuration file. + +You can specify an unprivileged user with the -u option, or the user directive +in the chrony.conf file, to which chronyd will switch after start in order to +drop root privileges. The configure script has a --with-user option, which sets +the default user. On Linux, chronyd needs to be compiled with support for the +libcap library. On other systems, chronyd forks into two processes. The child +process retains root privileges, but can only perform a very limited range of +privileged system calls on behalf of the parent. + +Also, if chronyd is compiled with support for the Linux secure computing +(seccomp) facility, you can enable a system call filter with the -F option. It +will significantly reduce the kernel attack surface and possibly prevent kernel +exploits from the chronyd process if it is compromised. It is recommended to +enable the filter only when it is known to work on the version of the system +where chrony is installed as the filter needs to allow also system calls made +from libraries that chronyd is using (e.g. libc) and different versions or +implementations of the libraries might make different system calls. If the +filter is missing some system call, chronyd could be killed even in normal +operation. + +2.6. How can I improve the accuracy of the system clock with NTP sources? + +Select NTP servers that are well synchronised, stable and close to your +network. It is better to use more than one server, three or four is usually +recommended as the minimum, so chronyd can detect servers that serve false time +and combine measurements from multiple sources. + +If you have a network card with hardware timestamping supported on Linux, it +can be enabled by the hwtimestamp directive in the chrony.conf file. It should +make local receive and transmit timestamps of NTP packets much more accurate. + +There are also useful options which can be set in the server directive, they +are minpoll, maxpoll, polltarget, maxdelay, maxdelayratio, maxdelaydevratio, +and xleave. + +The first three options set the minimum and maximum allowed polling interval, +and how should be the actual interval adjusted in the specified range. Their +default values are 6 (64 seconds) for minpoll, 10 (1024 seconds) for maxpoll +and 8 (samples) for polltarget. The default values should be used for general +servers on the Internet. With your own NTP servers, or if you have permission +to poll some servers more frequently, setting these options for shorter polling +intervals might significantly improve the accuracy of the system clock. + +The optimal polling interval depends mainly on two factors, stability of the +network latency and stability of the system clock (which mainly depends on the +temperature sensitivity of the crystal oscillator and the maximum rate of the +temperature change). + +Generally, if the sourcestats command usually reports a small number of samples +retained for a source (e.g. fewer than 16), a shorter polling interval should +be considered. If the number of samples is usually at the maximum of 64, a +longer polling interval might work better. + +An example of the directive for an NTP server on the Internet that you are +allowed to poll frequently could be + +server foo.example.net minpoll 4 maxpoll 6 polltarget 16 + +An example using shorter polling intervals with a server located in the same +LAN could be + +server ntp.local minpoll 2 maxpoll 4 polltarget 30 + +The maxdelay options are useful to ignore measurements with an unusally large +delay (e.g. due to congestion in the network) and improve the stability of the +synchronisation. The maxdelaydevratio option could be added to the example with +local NTP server + +server ntp.local minpoll 2 maxpoll 4 polltarget 30 maxdelaydevratio 2 + +If your server supports the interleaved mode (e.g. it is running chronyd), the +xleave option should be added to the server directive in order to allow the +server to send the client more accurate transmit timestamps (kernel or +preferably hardware). For example: + +server ntp.local minpoll 2 maxpoll 4 xleave + +When combined with local hardware timestamping, good network switches, and even +shorter polling intervals, a sub-microsecond accuracy and stability of a few +tens of nanoseconds might be possible. For example: + +server ntp.local minpoll 0 maxpoll 0 xleave +hwtimestamp eth0 + +For best stability, the CPU should be running at a constant frequency (i.e. +disabled power saving and performance boosting). Energy-Efficient Ethernet +(EEE) should be disabled in the network. The switches should be configured to +prioritize NTP packets, especially if the network is expected to be heavily +loaded. The dscp directive can be used to set the Differentiated Services Code +Point in transmitted NTP packets if needed. + +If it is acceptable for NTP clients in the network to send requests at a high +rate, a sub-second polling interval can be specified. A median filter can be +enabled in order to update the clock at a reduced rate with more stable +measurements. For example: + +server ntp.local minpoll -6 maxpoll -6 filter 15 xleave +hwtimestamp eth0 minpoll -6 + +2.7. Does chronyd have an ntpdate mode? + +Yes. With the -q option chronyd will set the system clock once and exit. With +the -Q option it will print the measured offset without setting the clock. If +you do not want to use a configuration file, NTP servers can be specified on +the command line. For example: + +# chronyd -q 'pool pool.ntp.org iburst' + +The command above would normally take about 5 seconds if the servers were well +synchronised and responding to all requests. If not synchronised or responding, +it would take about 10 seconds for chronyd to give up and exit with a non-zero +status. A faster configuration is possible. A single server can be used instead +of four servers, the number of measurements can be reduced with the maxsamples +option to one (supported in chrony version 4.0), and a timeout can be specified +with the -t option. The following command would take only up to about one +second. + +# chronyd -q -t 1 'server pool.ntp.org iburst maxsamples 1' + +It is not recommended to run chronyd with the -q option periodically (e.g. from +a cron job) as a replacement for the daemon mode, because it performs +significantly worse (e.g. the clock is stepped and its frequency is not +corrected). If you must run it this way and you are using a public NTP server, +make sure chronyd does not always start around the first second of a minute, +e.g. by adding a random sleep before the chronyd command. Public servers +typically receive large bursts of requests around the first second as there is +a large number of NTP clients started from cron with no delay. + +2.8. Can chronyd be configured to control the clock like ntpd? + +It is not possible to perfectly emulate ntpd, but there are some options that +can configure chronyd to behave more like ntpd if there is a reason to prefer +that. + +In the following example the minsamples directive slows down the response to +changes in the frequency and offset of the clock. The maxslewrate and +corrtimeratio directives reduce the maximum frequency error due to an offset +correction and the maxdrift directive reduces the maximum assumed frequency +error of the clock. The makestep directive enables a step threshold and the +maxchange directive enables a panic threshold. The maxclockerror directive +increases the minimum dispersion rate. + +minsamples 32 +maxslewrate 500 +corrtimeratio 100 +maxdrift 500 +makestep 0.128 -1 +maxchange 1000 1 1 +maxclockerror 15 + +Note that increasing minsamples might cause the offsets in the tracking and +sourcestats reports/logs to be significantly smaller than the actual offsets +and be unsuitable for monitoring. + +2.9. Can NTP server be separated from NTP client? + +Yes, it is possible to run multiple instances of chronyd on the same computer. +One can be configured as an NTP client, and another as a server. They need to +use different pidfiles, NTP ports, command ports, and Unix domain command +sockets. The server instance should be started with the -x option to avoid +touching the clock. It can be configured to serve the system time with the +local directive, or synchronise its NTP clock to the client instance running on +localhost using a non-standard NTP port. + +On Linux, starting with chrony version 4.0, it is also possible to run multiple +server instances sharing a port to utilise multiple cores of the CPU. Note that +the client/server interleaved mode requires that all packets from an address +are handled by the same server instance. + +2.10. Should be a leap smear enabled on NTP server? + +With the smoothtime and leapsecmode directives it is possible to enable a +server leap smear in order to hide leap seconds from clients and force them to +follow a slow server's adjustment instead. + +This feature should be used only in local networks and only when necessary, +e.g. when the clients cannot be configured to handle the leap seconds as +needed, or their number is so large that configuring them all would be +impractical. The clients should use only one leap-smearing server, or multiple +identically configured leap-smearing servers. Note that some clients can get +leap seconds from external sources (e.g. with the leapsectz directive in +chrony) and they will not work correctly with a leap smearing server. + +2.11. Does chrony support PTP? + +No, the Precision Time Protocol (PTP) is not supported and there are no plans +to support it. It is a complex protocol, which shares some issues with the NTP +broadcast mode. One of the main differences between NTP and PTP is that PTP was +designed to be easily supported in hardware (e.g. network switches and routers) +in order to make more stable and accurate measurements. PTP relies on the +hardware support. NTP does not rely on any support in the hardware, but if it +had the same support as PTP, it could perform equally well. + +On Linux, chrony supports hardware clocks that some NICs have for PTP. They are +called PTP hardware clocks (PHC). They can be used as reference clocks +(specified by the refclock directive) and for hardware timestamping of NTP +packets (enabled by the hwtimestamp directive) if the NIC can timestamp other +packets than PTP, which is usually the case at least for transmitted packets. +The ethtool -T command can be used to verify the timestamping support. + +2.12. What happened to the commandkey and generatecommandkey directives? + +They were removed in version 2.2. Authentication is no longer supported in the +command protocol. Commands that required authentication are now allowed only +through a Unix domain socket, which is accessible only by the root and chrony +users. If you need to configure chronyd remotely or locally without the root +password, please consider using ssh and/or sudo to run chronyc under the root +or chrony user on the host where chronyd is running. + +3. Computer is not synchronising + +This is the most common problem. There are a number of reasons, see the +following questions. + +3.1. Behind a firewall? + +Check the Reach value printed by the chronyc's sources command. If it is zero, +it means chronyd did not get any valid responses from the NTP server you are +trying to use. If there is a firewall between you and the server, the packets +might be blocked. Try using a tool like wireshark or tcpdump to see if you are +getting any responses from the server. + +When chronyd is receiving responses from the servers, the output of the sources +command issued few minutes after chronyd start might look like this: + +210 Number of sources = 3 +MS Name/IP address Stratum Poll Reach LastRx Last sample +=============================================================================== +^* foo.example.net 2 6 377 34 +484us[ -157us] +/- 30ms +^- bar.example.net 2 6 377 34 +33ms[ +32ms] +/- 47ms +^+ baz.example.net 3 6 377 35 -1397us[-2033us] +/- 60ms + +3.2. Are NTP servers specified with the offline option? + +Check that the chronyc's online and offline commands are used appropriately +(e.g. in the system networking scripts). The activity command prints the number +of sources that are currently online and offline. For example: + +200 OK +3 sources online +0 sources offline +0 sources doing burst (return to online) +0 sources doing burst (return to offline) +0 sources with unknown address + +3.3. Is chronyd allowed to step the system clock? + +By default, chronyd adjusts the clock gradually by slowing it down or speeding +it up. If the clock is too far from the true time, it will take a long time to +correct the error. The System time value printed by the chronyc's tracking +command is the remaining correction that needs to be applied to the system +clock. + +The makestep directive can be used to allow chronyd to step the clock. For +example, if chrony.conf had + +makestep 1 3 + +the clock would be stepped in the first three updates if its offset was larger +than one second. Normally, it is recommended to allow the step only in the +first few updates, but in some cases (e.g. a computer without an RTC or virtual +machine which can be suspended and resumed with an incorrect time) it might be +necessary to allow the step on any clock update. The example above would change +to + +makestep 1 -1 + +3.4. Using a Windows NTP server? + +A common issue with Windows NTP servers is that they report a very large root +dispersion (e.g. three seconds or more), which causes chronyd to ignore the +server for being too inaccurate. The sources command might show a valid +measurement, but the server is not selected for synchronisation. You can check +the root dispersion of the server with the chronyc's ntpdata command. + +The maxdistance value needs to be increased in chrony.conf to enable +synchronisation to such a server. For example: + +maxdistance 16.0 + +3.5. An unreachable source is selected? + +When chronyd is configured with multiple time sources, it tries to select the +most accurate and stable sources for synchronisation of the system clock. They +are marked with the * or + symbol in the report printed by the sources command. + +When the best source (marked with the * symbol) becomes unreachable (e.g. NTP +server stops responding), chronyd will not immediately switch to the second +best source in an attempt to minimise the error of the clock. It will let the +clock run free for as long as its estimated error (in terms of root distance) +based on previous measurements is smaller than the estimated error of the +second source, and there is still an interval which contains some measurements +from both sources. + +If the first source was significantly better than the second source, it can +take many hours before the second source is selected, depending on its polling +interval. You can force a faster reselection by increasing the clock error rate +(maxclockerror directive), shortening the polling interval (maxpoll option), or +reducing the number of samples (maxsamples option). + +3.6. Does selected source drop new measurements? + +chronyd can drop a large number of successive NTP measurements if they are not +passing some of the NTP tests. The sources command can report for a selected +source the fully-reachable value of 377 in the Reach column and at the same +time a LastRx value that is much larger than the current polling interval. If +the source is online, this indicates that a number of measurements was dropped. +You can use the ntpdata command to check the NTP tests for the last +measurement. Usually, it is the test C which fails. + +This can be an issue when there is a long-lasting increase in the measured +delay, e.g. due to a routing change in the network. Unfortunately, chronyd does +not know for how long it should wait for the delay to come back to the original +values, or whether it is a permanent increase and it should start from scratch. + +The test C is an adaptive filter. It can take many hours before it accepts a +measurement with the larger delay, and even much longer before it drops all +measurements with smaller delay, which determine an expected delay used by the +test. You can use the reset sources command to drop all measurements +immediately (available in chrony 4.0 and later). If this issue happens +frequently, you can effectively disable the test by setting the +maxdelaydevratio option to a very large value (e.g. 1000000), or speed up the +recovery by increasing the clock error rate with the maxclockerror directive. + +3.7. Using a PPS reference clock? + +A pulse-per-second (PPS) reference clock requires a non-PPS time source to +determine which second of UTC corresponds to each pulse. If it is another +reference clock specified with the lock option in the refclock directive, the +offset between the two reference clocks must be smaller than 0.2 seconds in +order for the PPS reference clock to work. With NMEA reference clocks it is +common to have a larger offset. It needs to be corrected with the offset +option. + +One approach to find out a good value of the offset option is to configure the +reference clocks with the noselect option and compare them to an NTP server. +For example, if the sourcestats command showed + +Name/IP Address NP NR Span Frequency Freq Skew Offset Std Dev +============================================================================== +PPS0 0 0 0 +0.000 2000.000 +0ns 4000ms +NMEA 58 30 231 -96.494 38.406 +504ms 6080us +foo.example.net 7 3 200 -2.991 16.141 -107us 492us + +the offset of the NMEA source would need to be increased by about 0.504 +seconds. It does not have to be very accurate. As long as the offset of the +NMEA reference clock stays below 0.2 seconds, the PPS reference clock should be +able to determine the seconds corresponding to the pulses and allow the samples +to be used for synchronisation. + +4. Issues with chronyc + +4.1. I keep getting the error 506 Cannot talk to daemon + +When accessing chronyd remotely, make sure that the chrony.conf file (on the +computer where chronyd is running) has a cmdallow entry for the computer you +are running chronyc on and an appropriate bindcmdaddress directive. This is not +necessary for localhost. + +Perhaps chronyd is not running. Try using the ps command (e.g. on Linux, ps +-auxw) to see if it is running. Or try netstat -a and see if the UDP port 323 +is listening. If chronyd is not running, you might have a problem with the way +you are trying to start it (e.g. at boot time). + +Perhaps you have a firewall set up in a way that blocks packets on the UDP port +323. You need to amend the firewall configuration in this case. + +4.2. I keep getting the error 501 Not authorised + +This error indicates that chronyc sent the command to chronyd using a UDP +socket instead of the Unix domain socket (e.g. /var/run/chrony/chronyd.sock), +which is required for some commands. For security reasons, only the root and +chrony users are allowed to access the socket. + +It is also possible that the socket does not exist. chronyd will not create the +socket if the directory has a wrong owner or permissions. In this case there +should be an error message from chronyd in the system log. + +4.3. What is the reference ID reported by the tracking command? + +The reference ID is a 32-bit value used in NTP to prevent synchronisation +loops. + +In chrony versions before 3.0 it was printed in the quad-dotted notation, even +if the reference source did not actually have an IPv4 address. For IPv4 +addresses, the reference ID is equal to the address, but for IPv6 addresses it +is the first 32 bits of the MD5 sum of the address. For reference clocks, the +reference ID is the value specified with the refid option in the refclock +directive. + +Since version 3.0, the reference ID is printed as a hexadecimal number to avoid +confusion with IPv4 addresses. + +If you need to get the IP address of the current reference source, use the -n +option to disable resolving of IP addresses and read the second field (printed +in parentheses) on the Reference ID line. + +4.4. Is the chronyc / chronyd protocol documented anywhere? + +Only by the source code. See cmdmon.c (chronyd side) and client.c (chronyc +side). + +5. Real-time clock issues + +5.1. What is the real-time clock (RTC)? + +This is the clock which keeps the time even when your computer is turned off. +It is used to initialise the system clock on boot. It normally does not drift +more than few seconds per day. + +There are two approaches how chronyd can work with it. One is to use the +rtcsync directive, which tells chronyd to enable a kernel mode which sets the +RTC from the system clock every 11 minutes. chronyd itself won't touch the RTC. +If the computer is not turned off for a long time, the RTC should still be +close to the true time when the system clock will be initialised from it on the +next boot. + +The other option is to use the rtcfile directive, which tells chronyd to +monitor the rate at which the RTC gains or loses time. When chronyd is started +with the -s option on the next boot, it will set the system time from the RTC +and also compensate for the drift it has measured previously. The rtcautotrim +directive can be used to keep the RTC close to the true time, but it is not +strictly necessary if its only purpose is to set the system clock when chronyd +is started on boot. See the documentation for details. + +5.2. Does hwclock have to be disabled? + +The hwclock program is often set-up by default in the boot and shutdown scripts +with many Linux installations. With the kernel RTC synchronisation (rtcsync +directive), the RTC will be set also every 11 minutes as long as the system +clock is synchronised. If you want to use chronyd's RTC monitoring (rtcfile +directive), it is important to disable hwclock in the shutdown procedure. If +you do not that, it will over-write the RTC with a new value, unknown to +chronyd. At the next reboot, chronyd started with the -s option will compensate +this (wrong) time with its estimate of how far the RTC has drifted whilst the +power was off, giving a meaningless initial system time. + +There is no need to remove hwclock from the boot process, as long as chronyd is +started after it has run. + +5.3. I just keep getting the 513 RTC driver not running message + +For the real-time clock support to work, you need the following three things + + o an RTC in your computer + + o a Linux kernel with enabled RTC support + + o an rtcfile directive in your chrony.conf file + +5.4. I get Could not open /dev/rtc, Device or resource busy in my syslog file + +Some other program running on the system might be using the device. + +5.5. What if my computer does not have an RTC or backup battery? + +In this case you can still use the -s option to set the system clock to the +last modification time of the drift file, which should correspond to the system +time when chronyd was previously stopped. The initial system time will be +increasing across reboots and applications started after chronyd will not +observe backward steps. + +6. NTP-specific issues + +6.1. Can chronyd be driven from broadcast/multicast NTP servers? + +No, the broadcast/multicast client mode is not supported and there is currently +no plan to implement it. While this mode can simplify configuration of clients +in large networks, it is inherently less accurate and less secure (even with +authentication) than the ordinary client/server mode. + +When configuring a large number of clients in a network, it is recommended to +use the pool directive with a DNS name which resolves to addresses of multiple +NTP servers. The clients will automatically replace the servers when they +become unreachable, or otherwise unsuitable for synchronisation, with new +servers from the pool. + +Even with very modest hardware, an NTP server can serve time to hundreds of +thousands of clients using the ordinary client/server mode. + +6.2. Can chronyd transmit broadcast NTP packets? + +Yes, the broadcast directive can be used to enable the broadcast server mode to +serve time to clients in the network which support the broadcast client mode +(it is not supported in chronyd). Note that this mode should generally be +avoided. See the previous question. + +6.3. Can chronyd keep the system clock a fixed offset away from real time? + +Yes. Starting from version 3.0, an offset can be specified by the offset option +for all time sources in the chrony.conf file. + +6.4. What happens if the network connection is dropped without using chronyc's +offline command first? + +chronyd will keep trying to access the sources that it thinks are online, and +it will take longer before new measurements are actually made and the clock is +corrected when the network is connected again. If the sources were set to +offline, chronyd would make new measurements immediately after issuing the +online command. + +Unless the network connection lasts only few minutes (less than the maximum +polling interval), the delay is usually not a problem, and it might be +acceptable to keep all sources online all the time. + +6.5. Why is an offset measured between two computers synchronised to each +another? + +When two computers are synchronised to each other using the client/server or +symmetric NTP mode, there is an expectation that NTP measurements between the +two computers made on both ends show an average offset close to zero. + +With chronyd that can be expected only when the interleaved mode (xleave +option) is enabled. Otherwise, chronyd will use different transmit timestamps +(e.g. daemon timestamp vs kernel timestamp) for serving time and +synchronisation of its own clock, which creates an asymmetry in the +timestamping and causes the other end to measure a significant offset. + +7. Operating systems + +7.1. Does chrony support Windows? + +No. The chronyc program (the command-line client used for configuring chronyd +while it is running) has been successfully built and run under Cygwin in the +past. chronyd is not portable, because part of it is very system-dependent. It +needs adapting to work with Windows' equivalent of the adjtimex() call, and it +needs to be made to work as a service. + +7.2. Are there any plans to support Windows? + +We have no plans to do this. Anyone is welcome to pick this work up and +contribute it back to the project. + +Last updated 2020-10-07 17:27:34 +0200 diff --git a/INSTALL b/INSTALL new file mode 100644 index 0000000..ecc7a46 --- /dev/null +++ b/INSTALL @@ -0,0 +1,165 @@ +Installation + +The software is distributed as source code which has to be compiled. The source +code is supplied in the form of a gzipped tar file, which unpacks to a +subdirectory identifying the name and version of the program. + +A C compiler (e.g. gcc or clang) and GNU Make are needed to build chrony. The +following libraries with their development files, and programs, are needed to +enable optional features: + + o pkg-config: detection of development libraries + + o Nettle, NSS, or LibTomCrypt: secure hash functions (SECHASH) + + o libcap: dropping root privileges on Linux (DROPROOT) + + o libseccomp: system call filter on Linux (SCFILTER) + + o GnuTLS and Nettle: Network Time Security (NTS) + + o Editline: line editing in chronyc (READLINE) + + o timepps.h header: PPS reference clock + + o Asciidoctor: documentation in HTML format + + o Bash: test suite + +The following programs are needed when building chrony from the git repository +instead of a released tar file: + + o Asciidoctor: manual pages + + o Bison: parser for chronyc settime command + +After unpacking the source code, change directory into it, and type + +./configure + +This is a shell script that automatically determines the system type. There is +an optional parameter --prefix, which indicates the directory tree where the +software should be installed. For example, + +./configure --prefix=/opt/free + +will install the chronyd daemon into /opt/free/sbin and the chronyc control +program into /opt/free/bin. The default value for the prefix is /usr/local. + +The configure script assumes you want to use gcc as your compiler. If you want +to use a different compiler, you can configure this way: + +CC=cc ./configure --prefix=/opt/free + +for Bourne-family shells, or + +setenv CC cc +setenv CFLAGS -O +./configure --prefix=/opt/free + +for C-family shells. + +If the software cannot (yet) be built on your system, an error message will be +shown. Otherwise, Makefile will be generated. + +On Linux, if development files for the libcap library are available, chronyd +will be built with support for dropping root privileges. On other systems no +extra library is needed. The default user which chronyd should run as can be +specified with the --with-user option of the configure script. + +If development files for the POSIX threads library are available, chronyd will +be built with support for asynchronous resolving of hostnames specified in the +server, peer, and pool directives. This allows chronyd operating as a server to +respond to client requests when resolving a hostname. If you don't want to +enable the support, specify the --disable-asyncdns flag to configure. + +If development files for the Nettle, NSS, or libtomcrypt library are available, +chronyd will be built with support for other cryptographic hash functions than +MD5, which can be used for NTP authentication with a symmetric key. If you +don't want to enable the support, specify the --disable-sechash flag to +configure. + +If development files for the editline library are available, chronyc will be +built with line editing support. If you don't want this, specify the +--disable-readline flag to configure. + +If a timepps.h header is available (e.g. from the LinuxPPS project), chronyd +will be built with PPS API reference clock driver. If the header is installed +in a location that isn't normally searched by the compiler, you can add it to +the searched locations by setting the CPPFLAGS variable to -I/path/to/timepps. + +The --help option can be specified to configure to print all options supported +by the script. + +Now type + +make + +to build the programs. + +If you want to build the manual in HTML, type + +make docs + +Once the programs have been successfully compiled, they need to be installed in +their target locations. This step normally needs to be performed by the +superuser, and requires the following command to be entered. + +make install + +This will install the binaries and man pages. + +To install the HTML version of the manual, enter the command + +make install-docs + +Now that the software is successfully installed, the next step is to set up a +configuration file. The default location of the file is /etc/chrony.conf. +Several examples of configuration with comments are included in the examples +directory. Suppose you want to use public NTP servers from the pool.ntp.org +project as your time reference. A minimal useful configuration file could be + +pool pool.ntp.org iburst +makestep 1.0 3 +rtcsync + +Then, chronyd can be run. For security reasons, it's recommended to create an +unprivileged user for chronyd and specify it with the -u command-line option or +the user directive in the configuration file, or set the default user with the +--with-user configure option before building. + +Support for system call filtering + +chronyd can be built with support for the Linux secure computing (seccomp) +facility. This requires development files for the libseccomp library and the +--enable-scfilter option specified to configure. The -F option of chronyd will +enable a system call filter, which should significantly reduce the kernel +attack surface and possibly prevent kernel exploits from chronyd if it is +compromised. + +Extra options for package builders + +The configure and make procedures have some extra options that may be useful if +you are building a distribution package for chrony. + +The --mandir=DIR option to configure specifies an installation directory for +the man pages. This overrides the man subdirectory of the argument to the +--prefix option. + +./configure --prefix=/usr --mandir=/usr/share/man + +to set both options together. + +The final option is the DESTDIR option to the make command. For example, you +could use the commands + +./configure --prefix=/usr --mandir=/usr/share/man +make all docs +make install DESTDIR=./tmp +cd tmp +tar cvf - . | gzip -9 > chrony.tar.gz + +to build a package. When untarred within the root directory, this will install +the files to the intended final locations. + +Last updated 2020-10-07 17:27:34 +0200 diff --git a/Makefile.in b/Makefile.in new file mode 100644 index 0000000..9a51df2 --- /dev/null +++ b/Makefile.in @@ -0,0 +1,139 @@ +################################################## +# +# chronyd/chronyc - Programs for keeping computer clocks accurate. +# +# Copyright (C) Richard P. Curnow 1997-2003 +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of version 2 of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# +# ======================================================================= +# +# Makefile template + +SYSCONFDIR = @SYSCONFDIR@ +BINDIR = @BINDIR@ +SBINDIR = @SBINDIR@ +LOCALSTATEDIR = @LOCALSTATEDIR@ +CHRONYVARDIR = @CHRONYVARDIR@ +DESTDIR = + +CC = @CC@ +CFLAGS = @CFLAGS@ +CPPFLAGS = @CPPFLAGS@ +LDFLAGS = @LDFLAGS@ + +EXTRA_OBJS = @EXTRA_OBJS@ + +OBJS = array.o cmdparse.o conf.o local.o logging.o main.o memory.o \ + reference.o regress.o rtc.o samplefilt.o sched.o socket.o sources.o sourcestats.o \ + stubs.o smooth.o sys.o sys_null.o tempcomp.o util.o $(EXTRA_OBJS) + +EXTRA_CLI_OBJS = @EXTRA_CLI_OBJS@ + +CLI_OBJS = array.o client.o cmdparse.o getdate.o memory.o nameserv.o \ + pktlength.o socket.o util.o $(EXTRA_CLI_OBJS) + +ALL_OBJS = $(OBJS) $(CLI_OBJS) + +LIBS = @LIBS@ +EXTRA_LIBS = @EXTRA_LIBS@ +EXTRA_CLI_LIBS = @EXTRA_CLI_LIBS@ + +# Until we have a main procedure we can link, just build object files +# to test compilation + +all : chronyd chronyc + +chronyd : $(OBJS) + $(CC) $(CFLAGS) -o chronyd $(OBJS) $(LDFLAGS) $(LIBS) $(EXTRA_LIBS) + +chronyc : $(CLI_OBJS) + $(CC) $(CFLAGS) -o chronyc $(CLI_OBJS) $(LDFLAGS) $(LIBS) $(EXTRA_CLI_LIBS) + +distclean : clean + $(MAKE) -C doc distclean + $(MAKE) -C test/unit distclean + -rm -f .DS_Store + -rm -f Makefile config.h config.log + +clean : + $(MAKE) -C test/unit clean + -rm -f *.o *.s chronyc chronyd core.* *~ + -rm -f *.gcda *.gcno + -rm -rf .deps + -rm -rf *.dSYM + +getdate.c : getdate.y + bison -o getdate.c getdate.y + +# This can be used to force regeneration of getdate.c +getdate : + bison -o getdate.c getdate.y + +# For install, don't use the install command, because its switches +# seem to vary between systems. + +install: chronyd chronyc + [ -d $(DESTDIR)$(SYSCONFDIR) ] || mkdir -p $(DESTDIR)$(SYSCONFDIR) + [ -d $(DESTDIR)$(SBINDIR) ] || mkdir -p $(DESTDIR)$(SBINDIR) + [ -d $(DESTDIR)$(BINDIR) ] || mkdir -p $(DESTDIR)$(BINDIR) + [ -d $(DESTDIR)$(CHRONYVARDIR) ] || mkdir -p $(DESTDIR)$(CHRONYVARDIR) + if [ -f $(DESTDIR)$(SBINDIR)/chronyd ]; then rm -f $(DESTDIR)$(SBINDIR)/chronyd ; fi + if [ -f $(DESTDIR)$(BINDIR)/chronyc ]; then rm -f $(DESTDIR)$(BINDIR)/chronyc ; fi + cp chronyd $(DESTDIR)$(SBINDIR)/chronyd + chmod 755 $(DESTDIR)$(SBINDIR)/chronyd + cp chronyc $(DESTDIR)$(BINDIR)/chronyc + chmod 755 $(DESTDIR)$(BINDIR)/chronyc + $(MAKE) -C doc install + +docs : + $(MAKE) -C doc docs + +install-docs : + $(MAKE) -C doc install-docs + +%.o : %.c + $(CC) $(CFLAGS) $(CPPFLAGS) -c $< + +%.s : %.c + $(CC) $(CFLAGS) $(CPPFLAGS) -S $< + +quickcheck : chronyd chronyc + $(MAKE) -C test/unit check + cd test/simulation && ./run + cd test/system && ./run + +check : chronyd chronyc + $(MAKE) -C test/unit check + cd test/simulation && ./run -i 20 -m 2 + cd test/system && ./run + +print-chronyd-objects : + @echo $(OBJS) + +Makefile : Makefile.in configure + @echo + @echo Makefile needs to be regenerated, run ./configure + @echo + @exit 1 + +.deps: + @mkdir .deps + +.deps/%.d: %.c | .deps + @$(CC) -MM $(CPPFLAGS) -MT '$(<:%.c=%.o) $@' $< -o $@ + +ifndef NODEPS +-include $(ALL_OBJS:%.o=.deps/%.d) +endif diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..bf12cb5 --- /dev/null +++ b/NEWS @@ -0,0 +1,908 @@ +New in version 4.0 +================== + +Enhancements +------------ +* Add support for Network Time Security (NTS) authentication +* Add support for AES-CMAC keys (AES128, AES256) with Nettle +* Add authselectmode directive to control selection of unauthenticated sources +* Add binddevice, bindacqdevice, bindcmddevice directives +* Add confdir directive to better support fragmented configuration +* Add sourcedir directive and "reload sources" command to support dynamic + NTP sources specified in files +* Add clockprecision directive +* Add dscp directive to set Differentiated Services Code Point (DSCP) +* Add -L option to limit log messages by severity +* Add -p option to print whole configuration with included files +* Add -U option to allow start under non-root user +* Allow maxsamples to be set to 1 for faster update with -q/-Q option +* Avoid replacing NTP sources with sources that have unreachable address +* Improve pools to repeat name resolution to get "maxsources" sources +* Improve source selection with trusted sources +* Improve NTP loop test to prevent synchronisation to itself +* Repeat iburst when NTP source is switched from offline state to online +* Update clock synchronisation status and leap status more frequently +* Update seccomp filter +* Add "add pool" command +* Add "reset sources" command to drop all measurements +* Add authdata command to print details about NTP authentication +* Add selectdata command to print details about source selection +* Add -N option and sourcename command to print original names of sources +* Add -a option to some commands to print also unresolved sources +* Add -k, -p, -r options to clients command to select, limit, reset data + +Bug fixes +--------- +* Don't set interface for NTP responses to allow asymmetric routing +* Handle RTCs that don't support interrupts +* Respond to command requests with correct address on multihomed hosts + +Removed features +---------------- +* Drop support for RIPEMD keys (RMD128, RMD160, RMD256, RMD320) +* Drop support for long (non-standard) MACs in NTPv4 packets (chrony 2.x + clients using non-MD5/SHA1 keys need to use option "version 3") +* Drop support for line editing with GNU Readline + +New in version 3.5.1 +==================== + +Security fixes +-------------- +* Create new file when writing pidfile (CVE-2020-14367) + +New in version 3.5 +================== + +Enhancements +------------ +* Add support for more accurate reading of PHC on Linux 5.0 +* Add support for hardware timestamping on interfaces with read-only + timestamping configuration +* Add support for memory locking and real-time priority on FreeBSD, + NetBSD, Solaris +* Update seccomp filter to work on more architectures +* Validate refclock driver options + +Bug fixes +--------- +* Fix bindaddress directive on FreeBSD +* Fix transposition of hardware RX timestamp on Linux 4.13 and later +* Fix building on non-glibc systems + +New in version 3.4 +================== + +Enhancements +------------ +* Add filter option to server/pool/peer directive +* Add minsamples and maxsamples options to hwtimestamp directive +* Add support for faster frequency adjustments in Linux 4.19 +* Change default pidfile to /var/run/chrony/chronyd.pid to allow + chronyd without root privileges to remove it on exit +* Disable sub-second polling intervals for distant NTP sources +* Extend range of supported sub-second polling intervals +* Get/set IPv4 destination/source address of NTP packets on FreeBSD +* Make burst options and command useful with short polling intervals +* Modify auto_offline option to activate when sending request failed +* Respond from interface that received NTP request if possible +* Add onoffline command to switch between online and offline state + according to current system network configuration +* Improve example NetworkManager dispatcher script + +Bug fixes +--------- +* Avoid waiting in Linux getrandom system call +* Fix PPS support on FreeBSD and NetBSD + +New in version 3.3 +================== + +Enhancements +------------ +* Add burst option to server/pool directive +* Add stratum and tai options to refclock directive +* Add support for Nettle crypto library +* Add workaround for missing kernel receive timestamps on Linux +* Wait for late hardware transmit timestamps +* Improve source selection with unreachable sources +* Improve protection against replay attacks on symmetric mode +* Allow PHC refclock to use socket in /var/run/chrony +* Add shutdown command to stop chronyd +* Simplify format of response to manual list command +* Improve handling of unknown responses in chronyc + +Bug fixes +--------- +* Respond to NTPv1 client requests with zero mode +* Fix -x option to not require CAP_SYS_TIME under non-root user +* Fix acquisitionport directive to work with privilege separation +* Fix handling of socket errors on Linux to avoid high CPU usage +* Fix chronyc to not get stuck in infinite loop after clock step + +New in version 3.2 +================== + +Enhancements +------------ +* Improve stability with NTP sources and reference clocks +* Improve stability with hardware timestamping +* Improve support for NTP interleaved modes +* Control frequency of system clock on macOS 10.13 and later +* Set TAI-UTC offset of system clock with leapsectz directive +* Minimise data in client requests to improve privacy +* Allow transmit-only hardware timestamping +* Add support for new timestamping options introduced in Linux 4.13 +* Add root delay, root dispersion and maximum error to tracking log +* Add mindelay and asymmetry options to server/peer/pool directive +* Add extpps option to PHC refclock to timestamp external PPS signal +* Add pps option to refclock directive to treat any refclock as PPS +* Add width option to refclock directive to filter wrong pulse edges +* Add rxfilter option to hwtimestamp directive +* Add -x option to disable control of system clock +* Add -l option to log to specified file instead of syslog +* Allow multiple command-line options to be specified together +* Allow starting without root privileges with -Q option +* Update seccomp filter for new glibc versions +* Dump history on exit by default with dumpdir directive +* Use hardening compiler options by default + +Bug fixes +--------- +* Don't drop PHC samples with low-resolution system clock +* Ignore outliers in PHC tracking, RTC tracking, manual input +* Increase polling interval when peer is not responding +* Exit with error message when include directive fails +* Don't allow slash after hostname in allow/deny directive/command +* Try to connect to all addresses in chronyc before giving up + +New in version 3.1 +================== + +Enhancements +------------ +* Add support for precise cross timestamping of PHC on Linux +* Add minpoll, precision, nocrossts options to hwtimestamp directive +* Add rawmeasurements option to log directive and modify measurements + option to log only valid measurements from synchronised sources +* Allow sub-second polling interval with NTP sources + +Bug fixes +--------- +* Fix time smoothing in interleaved mode + +New in version 3.0 +================== + +Enhancements +------------ +* Add support for software and hardware timestamping on Linux +* Add support for client/server and symmetric interleaved modes +* Add support for MS-SNTP authentication in Samba +* Add support for truncated MACs in NTPv4 packets +* Estimate and correct for asymmetric network jitter +* Increase default minsamples and polltarget to improve stability + with very low jitter +* Add maxjitter directive to limit source selection by jitter +* Add offset option to server/pool/peer directive +* Add maxlockage option to refclock directive +* Add -t option to chronyd to exit after specified time +* Add partial protection against replay attacks on symmetric mode +* Don't reset polling interval when switching sources to online state +* Allow rate limiting with very short intervals +* Improve maximum server throughput on Linux and NetBSD +* Remove dump files after start +* Add tab-completion to chronyc with libedit/readline +* Add ntpdata command to print details about NTP measurements +* Allow all source options to be set in add server/peer command +* Indicate truncated addresses/hostnames in chronyc output +* Print reference IDs as hexadecimal numbers to avoid confusion with + IPv4 addresses + +Bug fixes +--------- +* Fix crash with disabled asynchronous name resolving + +New in version 2.4.1 +==================== + +Bug fixes +--------- +* Fix processing of kernel timestamps on non-Linux systems +* Fix crash with smoothtime directive +* Fix validation of refclock sample times +* Fix parsing of refclock directive + +New in version 2.4 +================== + +Enhancements +------------ +* Add orphan option to local directive for orphan mode compatible with ntpd +* Add distance option to local directive to set activation threshold + (1 second by default) +* Add maxdrift directive to set maximum allowed drift of system clock +* Try to replace NTP sources exceeding maximum distance +* Randomise source replacement to avoid getting stuck with bad sources +* Randomise selection of sources from pools on start +* Ignore reference timestamp as ntpd doesn't always set it correctly +* Modify tracking report to use same values as seen by NTP clients +* Add -c option to chronyc to write reports in CSV format +* Provide detailed manual pages + +Bug fixes +--------- +* Fix SOCK refclock to work correctly when not specified as last refclock +* Fix initstepslew and -q/-Q options to accept time from own NTP clients +* Fix authentication with keys using 512-bit hash functions +* Fix crash on exit when multiple signals are received +* Fix conversion of very small floating-point numbers in command packets + +Removed features +---------------- +* Drop documentation in Texinfo format + +New in version 2.3 +================== + +Enhancements +------------ +* Add support for NTP and command response rate limiting +* Add support for dropping root privileges on Mac OS X, FreeBSD, Solaris +* Add require and trust options for source selection +* Enable logchange by default (1 second threshold) +* Set RTC on Mac OS X with rtcsync directive +* Allow binding to NTP port after dropping root privileges on NetBSD +* Drop CAP_NET_BIND_SERVICE capability on Linux when NTP port is disabled +* Resolve names in separate process when seccomp filter is enabled +* Replace old records in client log when memory limit is reached +* Don't reveal local time and synchronisation state in client packets +* Don't keep client sockets open for longer than necessary +* Ignore poll in KoD RATE packets as ntpd doesn't always set it correctly +* Warn when using keys shorter than 80 bits +* Add keygen command to generate random keys easily +* Add serverstats command to report NTP and command packet statistics + +Bug fixes +--------- +* Fix clock correction after making step on Mac OS X +* Fix building on Solaris + +New in version 2.2.1 +==================== + +Security fixes +-------------- +* Restrict authentication of NTP server/peer to specified key (CVE-2016-1567) + +New in version 2.2 +================== + +Enhancements +------------ +* Add support for configuration and monitoring over Unix domain socket + (accessible by root or chrony user when root privileges are dropped) +* Add support for system call filtering with seccomp on Linux (experimental) +* Add support for dropping root privileges on NetBSD +* Control frequency of system clock on FreeBSD, NetBSD, Solaris +* Add system leap second handling mode on FreeBSD, NetBSD, Solaris +* Add dynamic drift removal on Mac OS X +* Add support for setting real-time priority on Mac OS X +* Add maxdistance directive to limit source selection by root distance + (3 seconds by default) +* Add refresh command to get new addresses of NTP sources +* Allow wildcard patterns in include directive +* Restore time from driftfile with -s option if later than RTC time +* Add configure option to set default hwclockfile +* Add -d option to chronyc to enable debug messages +* Allow multiple addresses to be specified for chronyc with -h option + and reconnect when no valid reply is received +* Make check interval in waitsync command configurable + +Bug fixes +--------- +* Fix building on NetBSD, Solaris +* Restore time from driftfile with -s option if reading RTC failed + +Removed features +---------------- +* Drop support for authentication with command key (run-time configuration + is now allowed only for local users that can access the Unix domain socket) + +New in version 2.1.1 +==================== + +Bug fixes +--------- +* Fix clock stepping by integer number of seconds on Linux + +New in version 2.1 +================== + +Enhancements +------------ +* Add support for Mac OS X +* Try to replace unreachable and falseticker servers/peers specified + by name like pool sources +* Add leaponly option to smoothtime directive to allow synchronised + leap smear between multiple servers +* Use specific reference ID when smoothing served time +* Add smoothing command to report time smoothing status +* Add smoothtime command to activate or reset time smoothing + +Bug fixes +--------- +* Fix crash in source selection with preferred sources +* Fix resetting of time smoothing +* Include packet precision in peer dispersion +* Fix crash in chronyc on invalid command syntax + +New in version 2.0 +================== + +Enhancements +------------ +* Update to NTP version 4 (RFC 5905) +* Add pool directive to specify pool of NTP servers +* Add leapsecmode directive to select how to correct clock for leap second +* Add smoothtime directive to smooth served time and enable leap smear +* Add minsources directive to set required number of selectable sources +* Add minsamples and maxsamples options for all sources +* Add tempcomp configuration with list of points +* Allow unlimited number of NTP sources, refclocks and keys +* Allow unreachable sources to remain selected +* Improve source selection +* Handle offline sources as unreachable +* Open NTP server port only when necessary (client access is allowed by + allow directive/command or peer/broadcast is configured) +* Change default bindcmdaddress to loopback address +* Change default maxdelay to 3 seconds +* Change default stratumweight to 0.001 +* Update adjtimex synchronisation status +* Use system headers for adjtimex +* Check for memory allocation errors +* Reduce memory usage +* Add configure options to compile without NTP, cmdmon, refclock support +* Extend makestep command to set automatic clock stepping + +Bug fixes +--------- +* Add sanity checks for time and frequency offset +* Don't report synchronised status during leap second +* Don't combine reference clocks with close NTP sources +* Fix accepting requests from configured sources +* Fix initial fallback drift setting + +New in version 1.31.1 +===================== + +Security fixes +-------------- +* Protect authenticated symmetric NTP associations against DoS attacks + (CVE-2015-1853) +* Fix access configuration with subnet size indivisible by 4 (CVE-2015-1821) +* Fix initialization of reply slots for authenticated commands (CVE-2015-1822) + +New in version 1.31 +=================== + +Enhancements +------------ +* Support operation in other NTP eras (next era begins in 2036), + NTP time is mapped to [-50, +86] years around build date by default +* Restore time from driftfile with -s when RTC is missing/unsupported +* Close connected client sockets when not waiting for reply +* Use one client socket with random port when acquisitionport is 0 +* Use NTP packets instead of UDP echo for presend +* Don't adjust polling interval when sending fails +* Allow binding to addresses that don't exist yet +* Ignore measurements around leap second +* Improve detection of unexpected time jumps +* Include example of logrotate configuration, systemd services and + NetworkManager dispatcher script + +Bug fixes +--------- +* Reconnect client sockets for each request to follow changes + in network configuration automatically +* Restart timer when polling interval is changed on reset + +New in version 1.30 +=================== + +Enhancements +------------ +* Add asynchronous name resolving with POSIX threads +* Add PTP hardware clock (PHC) refclock driver +* Add new generic clock driver to slew by adjusting frequency only + (without kernel PLL or adjtime) and use it on Linux +* Add rtcautotrim directive to trim RTC automatically +* Add hwclockfile directive to share RTC LOCAL/UTC setting with hwclock +* Add maxslewrate directive to set maximum allowed slew rate +* Add maxdispersion option for refclocks +* Add -q/-Q options to set clock/print offset once and exit +* Allow directives to be specified on chronyd command line +* Replace frequency scaling in Linux driver with retaining of tick +* Try to detect unexpected forward time jumps and reset state +* Exit with non-zero code when maxchange limit is reached +* Improve makestep to not start and stop slew unnecessarily +* Change default corrtimeratio to 3.0 to improve frequency accuracy +* Announce leap second only on last day of June and December +* Use separate connected client sockets for each NTP server +* Remove separate NTP implementation used for initstepslew +* Limit maximum minpoll set by KoD RATE to default maxpoll +* Don't send NTP requests with unknown key +* Print warning when source is added with unknown key +* Take leap second in PPS refclock from locked source +* Make reading of RTC for initial trim more reliable +* Don't create cmdmon sockets when cmdport is 0 +* Add configure option to set default user to drop root privileges +* Add configure option to compile with debug messages +* Print debug messages when -d is used more than once +* Change format of messages written to terminal with -d +* Write fatal messages also to stderr with -n +* Use IP_RECVERR socket option in chronyc to not wait unnecessarily +* Shorten default chronyc timeout for localhost +* Change default hostname in chronyc from localhost to 127.0.0.1 +* Print error message on invalid syntax with all chronyc commands +* Include simulation test suite using clknetsim + +Bug fixes +--------- +* Fix crash when selecting with multiple preferred sources +* Fix frequency calculation with large frequency offsets +* Fix code writing drift and RTC files to compile correctly +* Fix -4/-6 options in chronyc to not reset hostname set by -h +* Fix refclock sample validation with sub-second polling interval +* Set stratum correctly with non-PPS SOCK refclock and local stratum +* Modify dispersion accounting in refclocks to prevent PPS getting + stuck with large dispersion and not accepting new samples + +New in version 1.29.1 +===================== + +Security fixes +-------------- +* Modify chronyc protocol to prevent amplification attacks (CVE-2014-0021) + (incompatible with previous protocol version, chronyc supports both) + +New in version 1.29 +=================== + +Security fixes +-------------- +* Fix crash when processing crafted commands (CVE-2012-4502) + (possible with IP addresses allowed by cmdallow and localhost) +* Don't send uninitialized data in SUBNETS_ACCESSED and CLIENT_ACCESSES + replies (CVE-2012-4503) (not used by chronyc) + +Other changes +------------- +* Drop support for SUBNETS_ACCESSED and CLIENT_ACCESSES commands + +New in version 1.28 +=================== + +* Combine sources to improve accuracy +* Make config and command parser strict +* Add -a option to chronyc to authenticate automatically +* Add -R option to ignore initstepslew and makestep directives +* Add generatecommandkey, minsamples, maxsamples and user directives +* Improve compatibility with NTPv1 and NTPv2 clients +* Create sockets only in selected family with -4/-6 option +* Treat address bind errors as non-fatal +* Extend tracking log +* Accept float values as initstepslew threshold +* Allow hostnames in offline, online and burst commands +* Fix and improve peer polling +* Fix crash in config parsing with too many servers +* Fix crash with duplicated initstepslew address +* Fix delta calculation with extreme frequency offsets +* Set local stratum correctly +* Remove unnecessary adjtimex calls +* Set paths in documentation by configure +* Update chrony.spec + +New in version 1.27 +=================== + +* Support for stronger keys via NSS or libtomcrypt library +* Support reading leap second data from tz database +* Support for precise clock stepping on Linux +* Support for nanoseconds in SHM refclock +* Make offset corrections smoother on Linux +* Make transmit timestamps random below clock precision +* Add corrtimeratio and maxchange directives +* Extend tracking, sources and activity reports +* Wait in foreground process until daemon is fully initialized +* Fix crash with slow name resolving +* Fix iburst with jittery sources +* Fix offset stored in rtc data right after trimrtc +* Fix crash and hang with RTC or manual samples +* Don't use readonly adjtime on Linux kernels before 2.6.28 +* Changed chronyc protocol, incompatible with older versions + +New in version 1.26 +=================== + +* Add compatibility with Linux 3.0 and later +* Use proper source address in NTP replies on multihomed IPv6 hosts +* Accept NTP packets with versions 4, 3 and 2 +* Cope with unexpected backward time jumps +* Don't reset kernel frequency on start without drift file +* Retry on permanent DNS error by default +* Add waitsync command + +New in version 1.25 +=================== + +* Improve accuracy with NTP sources +* Improve accuracy with reference clocks +* Improve polling interval adjustment +* Improve stability with temporary asymmetric delays +* Improve source selection +* Improve initial synchronisation +* Add delayed server name resolving +* Add temperature compensation +* Add nanosecond slewing to Linux driver +* Add fallback drifts +* Add iburst, minstratum, maxdelaydevratio, polltarget, + prefer, noselect options +* Add rtcsync directive to enable Linux 11-minute mode +* Add reselectdist, stratumweight, logbanner, maxclockerror, + include directives +* Add -n option to not detach daemon from terminal +* Fix pidfile directive +* Fix name resolving with disabled IPv6 support +* Fix reloading sample histories with reference clocks +* Fix crash with auto_offline option +* Fix online command on auto_offline sources +* Fix file descriptor leaks +* Increase burst polling interval and stop on KoD RATE +* Set maxupdateskew to 1000 ppm by default +* Require password for clients command +* Update drift file at most once per hour +* Use system headers for Linux RTC support +* Reduce default chronyc timeout and make it configurable +* Avoid large values in chronyc sources and sourcestats output +* Add reselect command to force reselecting best source +* Add -m option to allow multiple commands on command line + +New in version 1.24 +=================== + +Security fixes +-------------- +* Don't reply to invalid cmdmon packets (CVE-2010-0292) +* Limit client log memory size (CVE-2010-0293) +* Limit rate of syslog messages (CVE-2010-0294) + +Bug fixes/Enhancements +---------------------- +* Support for reference clocks (SHM, SOCK, PPS drivers) +* IPv6 support +* Linux capabilities support (to drop root privileges) +* Memory locking support on Linux +* Real-time scheduler support on Linux +* Leap second support on Linux +* Support for editline library +* Support for new Linux readonly adjtime +* NTP client support for KoD RATE +* Read kernel timestamps for received NTP packets +* Reply to NTP requests with correct address on multihomed hosts +* Retry name resolving after temporary failure +* Fix makestep command, make it available on all systems +* Add makestep directive for automatic clock stepping +* Don't require _bigadj kernel symbol on NetBSD +* Avoid blocking read in Linux RTC driver +* Support for Linux on S/390 and PowerPC +* Fix various bugs on 64-bit systems +* Fix valgrind errors and compiler warnings +* Improve configure to support common options and variables +* Improve status checking and printing in chronyc +* Return non-zero exit code on errors in chronyc +* Reduce request timeout in chronyc +* Print estimated offset in sourcestats +* Changed chronyc protocol, incompatible with older versions + +New in version 1.23 +=================== + +* Support for MIPS, x86_64, sparc, alpha, arm, FreeBSD +* Fix serious sign-extension error in handling IP addresses +* RTC support can be excluded at compile time +* Make sources gcc-4 compatible +* Fix various compiler warnings +* Handle fluctuations in peer distance better. +* Fixed handling of stratum zero. +* Fix various problems for 64-bit systems +* Flush chronyc output streams after each command, to allow it to be driven + through pipes +* Manpage improvements + +Version 1.22 +============ + +This release number was claimed by a release that Mandriva made to patch +important bugs in 1.21. The official numbering has jumped to 1.23 as a +consequence. + +New in version 1.21 +=================== + +* Don't include Linux kernel header files any longer : allows chrony to compile + on recent distros. +* Stop trying to use RTC if continuous streams of error messages would occur + (Linux with HPET). + +New in version 1.20 +=================== + +* Many small tidy-ups and security improvements +* Improve documentation (RTC support in post 2.0 kernels) +* Remove trailing \n from syslog messages +* Syslog messages now include IP and port number when packet cannot be sent. +* Added the "acquisitionport" directive. (Kalle Olavi Niemitalo) +* Use uname(2) instead of /proc/version to get kernel version. +* Merge support for Linux on Alpha +* Merge support for 64bit architectures +* Don't link -lm if it's not needed +* Fix Solaris build (broken by 64bit change) +* Add detection of Linux 2.5 +* Allow arbitrary value of HZ in Linux kernel +* Fix for chrony.spec on SuSE (Paul Elliot) +* Fix handling of initstepslew if no servers are listed (John Hasler) +* Fix install rule in Makefile if chronyd is in use (Juliusz Chroboczek) +* Replace sprintf by snprintf to remove risk of buffer overrun (John Hasler) +* Add --help to configure script + +New in version 1.19 +=================== + +* Auto-detect kernel's timer interrupt rate (so-called 'HZ') when chronyd + starts instead of relying on compiled-in value. +* Fix 2 bugs in function that creates the directory for the log and dump files. +* Amended webpage URL and contact details. +* Generate more informative syslog messages before exiting on failed + assertions. +* Fix bugs in clamping code for the tick value used when slewing a large + offset. +* Don't chown files to root during install (should be pointless, and makes RPM + building awkward as ordinary user.) +* Include chrony.spec file for building RPMs + +New in version 1.18 +=================== +* Amend homepage and mailing list information to chrony.sunsite.dk +* Delete pidfile on exit from chronyd. +* Improvements to readline interface to chronyc +* Only generate syslog message when synchronisation is initially lost (instead + of on every failed synchronisation attempt) +* Use double fork approach when initialising daemon. +* More things in contrib directory. +* New options to help package builders: --infodir/--mandir for configure, and + DESTDIR=xxx for make. (See section 2.2 of chrony.txt for details). +* Changed the wording of the messages generated by mailonchange and logchange + directives. + +New in version 1.17 +=================== +* Port to NetBSD +* Configuration supports Linux on PPC +* Fix compilation warnings +* Several documentation improvements +* Bundled manpages (taken from the 'missing manpages project') +* Cope with lack of bzero function for Solaris 2.3 systems +* Store chronyd's pid in a file (default /var/run/chronyd.pid) and check if + chronyd may already be running when starting up. New pidfile directive in + configuration file. +* Any size subnet is now allowed in allow and deny commands. (Example: + 6.7.8/20 or 6.7.8.x/20 (any x) mean a 20 bit subnet). +* The environment variables CC and CFLAGS passed to configure can now be used + to select the compiler and optimisation/debug options to use +* Write syslog messages when chronyd loses synchronisation. +* Print GPL text when chronyc is run. +* Add NTP broadcast server capability (new broadcast directive). +* Add 'auto_offline' option to server/peer (conf file) or add server/peer (via + chronyc). +* Add 'activity' command to chronyc, to report how many servers/peers are + currently online/offline. +* Fix long-standing bug with how the system time quantum was calculated. +* Include support for systems with HZ!=100 (HZ is the timer interrupt + frequency). +* Include example chrony.conf and chrony.keys files (examples subdirectory). +* Include support for readline in chronyc. + +New in version 1.16.1 +===================== +* Fix compilation problem on Linux 2.4.13 (spinlock.h / spinlock_t) + +New in version 1.16 +=================== +* More informative captions for 'sources' and 'sourcestats' commands in chronyc + (use 'sources -v' and 'sourcestats -v' to get them). +* Correct behaviour for Solaris versions>=2.6 (dosynctodr not required on these + versions.) +* Remove some compiler warnings (Solaris) +* If last line of keys file doesn't have end-of-line, don't truncate final + character of that key. +* Change timestamp format used in logfiles to make it fully numeric (to aid + importing data into spreadsheets etc) +* Minor documentation updates and improvements. + +New in version 1.15 +=================== +* Add contributed change to 'configure' to support Solaris 2.8 on x86 +* Workaround for assertion failure that arises if two received packets occur + close together. (Still need to find out why this happens at all.) +* Hopefully fix problem where fast slewing was incompatible with machines + that have a large background drift rate (=> tick value went out of range + for adjtimex() on Linux.) +* Fix rtc_linux.c compile problems with 2.4.x kernel include files. +* Include support for RTC device not being at /dev/rtc (new rtcdevice directive + in configuration file). +* Include support for restricting network interfaces for commands (new + bindcmdaddress directive in configuration file) +* Fix potential linking fault in pktlength.c (use of CROAK macro replaced by + normal assert). +* Add some material on bug reporting + contributing to the chrony.texi file +* Made the chrony.texi file "Vim6-friendly" (removed xrefs on @node lines, + added folding markers to chapters + sections.) +* Switched over to GPL for the licence + +New in version 1.14 +=================== +* Fix compilation for certain other Linux distributions (including Mandrake + 7.1) + +New in version 1.13 +=================== +* Fixed compilation problems on Redhat/SuSE installations with recent 2.2.x + kernels. +* Minor tidy-ups and documentation enhancements. +* Add support for Linux 2.4 kernels + +New in version 1.12 +=================== + +* Trial fix for long-standing bug in Linux RTC estimator when system time is + slewed. +* Fix bug in chronyc if -h is specified without a hostname +* Fixes to logging various error conditions when operating in daemon mode. +* More stuff under contrib/ +* Changes to README file (e.g. about the new chrony-users mailing list) + +New in version 1.11a +==================== + +* Minor changes to contact details +* Minor changes to installation details (chrony subdirectory under doc/) + +New in version 1.11 +=================== + +* Improve robustness of installation procedure +* Tidy up documenation and contact details +* Distribute manual as .txt rather than as .ps +* Add -n option to chronyc to work with numeric IP addresses rather than + names. +* Add material in contrib subdirectory +* Improve robustness of handling drift file and RTC coefficients file +* Improve robustness of regression algorithm + +New in version 1.1 +================== + +Bug fixes +--------- + +* Made linear regression more resistant to rounding errors (old one + occasionally generated negative variances which made everything go + haywire). Trap infinite or 'not-a-number' values being used to + alter system clock to increase robustness further. + +Other changes/Enhancements +-------------------------- + +* Support for Linux 2.1 and 2.2 kernels + +* New command 'makestep' in chronyc to immediately jump the system + time to match the NTP estimated time (Linux only) - a response to + systems booting an hour wrong after summertime/wintertime changes, + due to RTCs running on local time. Needs extending to Sun driver + files too. + +* New directives 'logchange' and 'mailonchange' to log to syslog or + email to a specific address respectively if chronyd detects a clock + offset exceeding a defined threshold. + +* Added capability to log all client/peer NTP accesses and command + accesses (can be turned off with conf file directive 'noclientlog'). + Added 'clients' command to chronyc to display this data. + +* Improved manual mode to use robust regression rather than 2 point + fit. + +* Added 'manual list' and 'manual delete' commands to chronyc to + allow display of entered timestamps and discretionary deletion of + outliers. + +* If host goes unsynchronised the dummy IP address 0.0.0.0 is detected + to avoid attempting a reverse name lookup (to stop dial on demand IP + links from being started) + +* Changed chronyc/chronyd protocol so messages are now all variable + length. Saves on network bandwidth particularly for large replies + from chronyd to chronyc (to support the clients command). + +* Added bindaddress directive to configuration file, to give + additional control over limiting which hosts can access the local + server. + +* Groundwork done for a port to Windows NT to compile with Cygwin + toolkit. chronyc works (to monitor another host). sys_winnt.c + needs finishing to use NT clock control API. Program structure + needs adapting to use Windows NT service functions, so it can be + started at boot time. Hopefully a Windows NT / Cygwin guru with + some spare time can take this port over :-) + +New in version 1.02 +=================== + +Bug fixes +--------- + +* Fix error messages in chronyc if daemon is not reachable. + +* Fix config file problem for 'allow all' and 'deny all' without a + trailing machine address. + +* Remove fatal failed assertion if command socket cannot be read from + in daemon. + +* Rewrote timezone handling for Linux real time clock, following + various reported problems related to daylight saving. + +Other changes/Enhancements +-------------------------- + +* Configure script recognizes BSD/386 and uses SunOS 4.1 driver for + it. + +* Log files now print date as day-month-year rather than as a day + number. Milliseconds removed from timestamps of logged data. + Banners included in file to give meanings of columns. + +* Only do 1 initial step (followed by a trimming slew) when + initialising from RTC on Linux (previously did 2 steps). + +New in version 1.01 +=================== + +Bug fixes +--------- + +* Handle timezone of RTC correctly with respect to daylight saving + time + +* Syntax check the chronyc 'local' command properly + +* Fixed assertion failed fault in median finder (used by RTC + regression fitting) + +Other changes/Enhancements +-------------------------- + +* Log selection of new NTP reference source to syslog. + +* Don't zero-pad IP address fields + +* Add new command to chronyc to allow logfiles to be cycled. + +* Extend allow/deny directive syntax in configuration file to so + directive can apply to all hosts on the Internet. + +* Tidy up printout of timestamps to make it clear they are in UTC + +* Make 'configure' check the processor type as well as the operating + system. diff --git a/README b/README new file mode 100644 index 0000000..d825732 --- /dev/null +++ b/README @@ -0,0 +1,155 @@ +This is the README for chrony. + +What is chrony? +=============== + +chrony is a versatile implementation of the Network Time Protocol (NTP). +It can synchronise the system clock with NTP servers, reference clocks +(e.g. GPS receiver), and manual input using wristwatch and keyboard. +It can also operate as an NTPv4 (RFC 5905) server and peer to provide +a time service to other computers in the network. + +It is designed to perform well in a wide range of conditions, including +intermittent network connections, heavily congested networks, changing +temperatures (ordinary computer clocks are sensitive to temperature), +and systems that do not run continuosly, or run on a virtual machine. + +Typical accuracy between two machines synchronised over the Internet is +within a few milliseconds; on a LAN, accuracy is typically in tens of +microseconds. With hardware timestamping, or a hardware reference clock, +sub-microsecond accuracy may be possible. + +Two programs are included in chrony, chronyd is a daemon that can be +started at boot time and chronyc is a command-line interface program +which can be used to monitor chronyd's performance and to change various +operating parameters whilst it is running. + +What will chrony run on? +======================== + +The software is known to work on Linux, FreeBSD, NetBSD, macOS and +Solaris. Closely related systems may work too. Any other system will +likely require a porting exercise. + +How do I set it up? +=================== + +The file INSTALL gives instructions. On supported systems the +compilation process should be automatic. You will need a C compiler, +e.g. gcc or clang. + +What documentation is there? +============================ + +The distribution includes manual pages and a document containing +Frequently Asked Questions (FAQ). + +The documentation is also available on the chrony web pages, accessible +through the URL + + https://chrony.tuxfamily.org/ + +Where are new versions announced? +================================= + +There is a low volume mailing list where new versions and other +important news relating to chrony are announced. You can join this list +by sending mail with the subject "subscribe" to + +chrony-announce-request@chrony.tuxfamily.org + +How can I get support for chrony? +================================= + +There are two other mailing lists relating to chrony. chrony-users is a +discussion list for users, e.g. for questions about chrony configuration +and bug reports. chrony-dev is a more technical list for developers, +e.g. for submitting patches and discussing how new features should be +implemented. To subscribe to either of these lists, send a message with +the subject "subscribe" to + +chrony-users-request@chrony.tuxfamily.org +or +chrony-dev-request@chrony.tuxfamily.org + +as applicable. + +License +======= + +chrony is distributed under the GNU General Public License version 2. + +Authors +======= + +Richard P. Curnow +Miroslav Lichvar + +Acknowledgements +================ + +In writing the chronyd program, extensive use has been made of the NTPv3 (RFC +1305) and NTPv4 (RFC 5905) specification. The source code of the xntpd/ntpd +implementation written by Dennis Fergusson, Lars Mathiesen, David Mills, and +others, has been used to check the details of the protocol. + +The following people have provided patches and other major contributions +to chrony: + +Lonnie Abelbeck +Benny Lyne Amorsen +Andrew Bishop +Vincent Blut +Stephan I. Boettcher +David Bohman +Goswin Brederlow +Leigh Brown +Erik Bryer +Jonathan Cameron +Bryan Christianson +Juliusz Chroboczek +Christian Ehrhardt +Paul Elliott +Robert Fairley +Stefan R. Filipek +Mike Fleetwood +Alexander Gretencord +Andrew Griffiths +Walter Haidinger +Juergen Hannken-Illjes +John Hasler +Tjalling Hattink +Liam Hatton +Jachym Holecek +Håkan Johansson +Jim Knoble +Antti Jrvinen +Eric Lammerts +Stefan Lucke +Victor Lum +Kevin Lyda +Paul Menzel +Vladimir Michl +Victor Moroz +Kalle Olavi Niemitalo +Frank Otto +Denny Page +Chris Perl +Gautier PHILIPPON +Andreas Piesk +Andreas Steinmetz +NAKAMURA Takumi +Timo Teras +Bill Unruh +Stephen Wadeley +Bernhard Weiss +Wolfgang Weisselberg +Bernhard M. Wiedemann +Joachim Wiedorn +Ralf Wildenhues +Ulrich Windl +Doug Woodward +Thomas Zajic + +Many other people have contributed bug reports and suggestions. We are sorry +we cannot identify all of you individually. diff --git a/addressing.h b/addressing.h new file mode 100644 index 0000000..3e311fa --- /dev/null +++ b/addressing.h @@ -0,0 +1,67 @@ +/* + chronyd/chronyc - Programs for keeping computer clocks accurate. + + ********************************************************************** + * Copyright (C) Richard P. Curnow 1997-2002 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + ********************************************************************** + + ======================================================================= + + Types used for addressing sources etc + */ + +#ifndef GOT_ADDRESSING_H +#define GOT_ADDRESSING_H + +#include "sysincl.h" + +/* This type is used to represent an IPv4 address or IPv6 address. + Addresses which are not resolved yet can be represented with an ID. + All parts are in HOST order, NOT network order. */ + +#define IPADDR_UNSPEC 0 +#define IPADDR_INET4 1 +#define IPADDR_INET6 2 +#define IPADDR_ID 3 + +typedef struct { + union { + uint32_t in4; + uint8_t in6[16]; + uint32_t id; + } addr; + uint16_t family; + uint16_t _pad; +} IPAddr; + +typedef struct { + IPAddr ip_addr; + uint16_t port; +} IPSockAddr; + +typedef IPSockAddr NTP_Remote_Address; + +#define INVALID_IF_INDEX -1 + +typedef struct { + IPAddr ip_addr; + int if_index; + int sock_fd; +} NTP_Local_Address; + +#endif /* GOT_ADDRESSING_H */ + diff --git a/addrfilt.c b/addrfilt.c new file mode 100644 index 0000000..6208b46 --- /dev/null +++ b/addrfilt.c @@ -0,0 +1,405 @@ +/* + chronyd/chronyc - Programs for keeping computer clocks accurate. + + ********************************************************************** + * Copyright (C) Richard P. Curnow 1997,1998,1999,2000,2001,2002,2005 + * Copyright (C) Miroslav Lichvar 2009, 2015 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + ********************************************************************** + + ======================================================================= + + This module provides a set of routines for checking IP addresses + against a set of rules and deciding whether they are allowed or + disallowed. + + */ + +#include "config.h" + +#include "sysincl.h" + +#include "addrfilt.h" +#include "memory.h" + +/* Define the number of bits which are stripped off per level of + indirection in the tables */ +#define NBITS 4 + +/* Define the table size */ +#define TABLE_SIZE (1UL<addr.in6[i * 4 + 0] << 24 | + ip->addr.in6[i * 4 + 1] << 16 | + ip->addr.in6[i * 4 + 2] << 8 | + ip->addr.in6[i * 4 + 3]; +} + +/* ================================================== */ + +inline static uint32_t +get_subnet(uint32_t *addr, unsigned int where) +{ + int off; + + off = where / 32; + where %= 32; + + return (addr[off] >> (32 - NBITS - where)) & ((1UL << NBITS) - 1); +} + +/* ================================================== */ + +ADF_AuthTable +ADF_CreateTable(void) +{ + ADF_AuthTable result; + result = MallocNew(struct ADF_AuthTableInst); + + /* Default is that nothing is allowed */ + result->base4.state = DENY; + result->base4.extended = NULL; + result->base6.state = DENY; + result->base6.extended = NULL; + + return result; +} + +/* ================================================== */ +/* This function deletes all definitions of child nodes, in effect + pruning a whole subnet definition back to a single parent + record. */ +static void +close_node(TableNode *node) +{ + int i; + TableNode *child_node; + + if (node->extended != NULL) { + for (i=0; iextended[i]); + close_node(child_node); + } + Free(node->extended); + node->extended = NULL; + } +} + + +/* ================================================== */ +/* Allocate the extension field in a node, and set all the children's + states to default to that of the node being extended */ + +static void +open_node(TableNode *node) +{ + int i; + TableNode *child_node; + + if (node->extended == NULL) { + + node->extended = MallocArray(struct _TableNode, TABLE_SIZE); + + for (i=0; iextended[i]); + child_node->state = AS_PARENT; + child_node->extended = NULL; + } + } +} + +/* ================================================== */ + +static ADF_Status +set_subnet(TableNode *start_node, + uint32_t *ip, + int ip_len, + int subnet_bits, + State new_state, + int delete_children) +{ + int bits_to_go, bits_consumed; + uint32_t subnet; + TableNode *node; + + bits_consumed = 0; + bits_to_go = subnet_bits; + node = start_node; + + if ((subnet_bits < 0) || + (subnet_bits > 32 * ip_len)) { + + return ADF_BADSUBNET; + + } else { + + if ((bits_to_go & (NBITS-1)) == 0) { + + while (bits_to_go > 0) { + subnet = get_subnet(ip, bits_consumed); + if (!(node->extended)) { + open_node(node); + } + node = &(node->extended[subnet]); + bits_to_go -= NBITS; + bits_consumed += NBITS; + } + + if (delete_children) { + close_node(node); + } + node->state = new_state; + + } else { /* Have to set multiple entries */ + int N, i, j; + TableNode *this_node; + + while (bits_to_go >= NBITS) { + subnet = get_subnet(ip, bits_consumed); + if (!(node->extended)) { + open_node(node); + } + node = &(node->extended[subnet]); + bits_to_go -= NBITS; + bits_consumed += NBITS; + } + + /* How many subnet entries to set : 1->8, 2->4, 3->2 */ + N = 1 << (NBITS-bits_to_go); + + subnet = get_subnet(ip, bits_consumed) & ~(N - 1); + assert(subnet + N <= TABLE_SIZE); + + if (!(node->extended)) { + open_node(node); + } + + for (i=subnet, j=0; jextended[i]); + if (delete_children) { + close_node(this_node); + } + this_node->state = new_state; + } + } + + return ADF_SUCCESS; + } + +} + +/* ================================================== */ + +static ADF_Status +set_subnet_(ADF_AuthTable table, + IPAddr *ip_addr, + int subnet_bits, + State new_state, + int delete_children) +{ + uint32_t ip6[4]; + + switch (ip_addr->family) { + case IPADDR_INET4: + return set_subnet(&table->base4, &ip_addr->addr.in4, 1, subnet_bits, new_state, delete_children); + case IPADDR_INET6: + split_ip6(ip_addr, ip6); + return set_subnet(&table->base6, ip6, 4, subnet_bits, new_state, delete_children); + case IPADDR_UNSPEC: + /* Apply to both, subnet_bits has to be 0 */ + if (subnet_bits != 0) + return ADF_BADSUBNET; + memset(ip6, 0, sizeof (ip6)); + if (set_subnet(&table->base4, ip6, 1, 0, new_state, delete_children) == ADF_SUCCESS && + set_subnet(&table->base6, ip6, 4, 0, new_state, delete_children) == ADF_SUCCESS) + return ADF_SUCCESS; + break; + default: + break; + } + + return ADF_BADSUBNET; +} + +ADF_Status +ADF_Allow(ADF_AuthTable table, + IPAddr *ip, + int subnet_bits) +{ + return set_subnet_(table, ip, subnet_bits, ALLOW, 0); +} + +/* ================================================== */ + + +ADF_Status +ADF_AllowAll(ADF_AuthTable table, + IPAddr *ip, + int subnet_bits) +{ + return set_subnet_(table, ip, subnet_bits, ALLOW, 1); +} + +/* ================================================== */ + +ADF_Status +ADF_Deny(ADF_AuthTable table, + IPAddr *ip, + int subnet_bits) +{ + return set_subnet_(table, ip, subnet_bits, DENY, 0); +} + +/* ================================================== */ + +ADF_Status +ADF_DenyAll(ADF_AuthTable table, + IPAddr *ip, + int subnet_bits) +{ + return set_subnet_(table, ip, subnet_bits, DENY, 1); +} + +/* ================================================== */ + +void +ADF_DestroyTable(ADF_AuthTable table) +{ + close_node(&table->base4); + close_node(&table->base6); + Free(table); +} + +/* ================================================== */ + +static int +check_ip_in_node(TableNode *start_node, uint32_t *ip) +{ + uint32_t subnet; + int bits_consumed = 0; + int result = 0; + int finished = 0; + TableNode *node; + State state=DENY; + + node = start_node; + + do { + if (node->state != AS_PARENT) { + state = node->state; + } + if (node->extended) { + subnet = get_subnet(ip, bits_consumed); + node = &(node->extended[subnet]); + bits_consumed += NBITS; + } else { + /* Make decision on this node */ + finished = 1; + } + } while (!finished); + + switch (state) { + case ALLOW: + result = 1; + break; + case DENY: + result = 0; + break; + case AS_PARENT: + assert(0); + break; + } + + return result; +} + + +/* ================================================== */ + +int +ADF_IsAllowed(ADF_AuthTable table, + IPAddr *ip_addr) +{ + uint32_t ip6[4]; + + switch (ip_addr->family) { + case IPADDR_INET4: + return check_ip_in_node(&table->base4, &ip_addr->addr.in4); + case IPADDR_INET6: + split_ip6(ip_addr, ip6); + return check_ip_in_node(&table->base6, ip6); + default: + return 0; + } +} + +/* ================================================== */ + +static int +is_any_allowed(TableNode *node, State parent) +{ + State state; + int i; + + state = node->state != AS_PARENT ? node->state : parent; + assert(state != AS_PARENT); + + if (node->extended) { + for (i = 0; i < TABLE_SIZE; i++) { + if (is_any_allowed(&node->extended[i], state)) + return 1; + } + } else if (state == ALLOW) { + return 1; + } + + return 0; +} + +/* ================================================== */ + +int +ADF_IsAnyAllowed(ADF_AuthTable table, int family) +{ + switch (family) { + case IPADDR_INET4: + return is_any_allowed(&table->base4, AS_PARENT); + case IPADDR_INET6: + return is_any_allowed(&table->base6, AS_PARENT); + default: + return 0; + } +} diff --git a/addrfilt.h b/addrfilt.h new file mode 100644 index 0000000..b8c131f --- /dev/null +++ b/addrfilt.h @@ -0,0 +1,80 @@ +/* + chronyd/chronyc - Programs for keeping computer clocks accurate. + + ********************************************************************** + * Copyright (C) Richard P. Curnow 1997-2002 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + ********************************************************************** + + ======================================================================= + + Module for providing an authorisation filter on IP addresses + */ + +#ifndef GOT_ADDRFILT_H +#define GOT_ADDRFILT_H + +#include "addressing.h" + +typedef struct ADF_AuthTableInst *ADF_AuthTable; + +typedef enum { + ADF_SUCCESS, + ADF_BADSUBNET +} ADF_Status; + + +/* Create a new table. The default rule is deny for everything */ +extern ADF_AuthTable ADF_CreateTable(void); + +/* Allow anything in the supplied subnet, EXCEPT for any more specific + subnets that are already defined */ +extern ADF_Status ADF_Allow(ADF_AuthTable table, + IPAddr *ip, + int subnet_bits); + +/* Allow anything in the supplied subnet, overwriting existing + definitions for any more specific subnets */ +extern ADF_Status ADF_AllowAll(ADF_AuthTable table, + IPAddr *ip, + int subnet_bits); + +/* Deny anything in the supplied subnet, EXCEPT for any more specific + subnets that are already defined */ +extern ADF_Status ADF_Deny(ADF_AuthTable table, + IPAddr *ip, + int subnet_bits); + +/* Deny anything in the supplied subnet, overwriting existing + definitions for any more specific subnets */ +extern ADF_Status ADF_DenyAll(ADF_AuthTable table, + IPAddr *ip, + int subnet_bits); + +/* Clear up the table */ +extern void ADF_DestroyTable(ADF_AuthTable table); + +/* Check whether a given IP address is allowed by the rules in + the table */ +extern int ADF_IsAllowed(ADF_AuthTable table, + IPAddr *ip); + +/* Check if at least one address from a given family is allowed by + the rules in the table */ +extern int ADF_IsAnyAllowed(ADF_AuthTable table, + int family); + +#endif /* GOT_ADDRFILT_H */ diff --git a/array.c b/array.c new file mode 100644 index 0000000..d70cff9 --- /dev/null +++ b/array.c @@ -0,0 +1,130 @@ +/* + chronyd/chronyc - Programs for keeping computer clocks accurate. + + ********************************************************************** + * Copyright (C) Miroslav Lichvar 2014 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + ********************************************************************** + + ======================================================================= + + Functions implementing an array with automatic memory allocation. + + */ + +#include "config.h" + +#include "sysincl.h" + +#include "array.h" +#include "memory.h" + +struct ARR_Instance_Record { + void *data; + unsigned int elem_size; + unsigned int used; + unsigned int allocated; +}; + +ARR_Instance +ARR_CreateInstance(unsigned int elem_size) +{ + ARR_Instance array; + + assert(elem_size > 0); + + array = MallocNew(struct ARR_Instance_Record); + + array->data = NULL; + array->elem_size = elem_size; + array->used = 0; + array->allocated = 0; + + return array; +} + +void +ARR_DestroyInstance(ARR_Instance array) +{ + Free(array->data); + Free(array); +} + +static void +realloc_array(ARR_Instance array, unsigned int min_size) +{ + assert(min_size <= 2 * min_size); + if (array->allocated >= min_size && array->allocated <= 2 * min_size) + return; + + if (array->allocated < min_size) { + while (array->allocated < min_size) + array->allocated = array->allocated ? 2 * array->allocated : 1; + } else { + array->allocated = min_size; + } + + array->data = Realloc2(array->data, array->allocated, array->elem_size); +} + +void * +ARR_GetNewElement(ARR_Instance array) +{ + array->used++; + realloc_array(array, array->used); + return ARR_GetElement(array, array->used - 1); +} + +void * +ARR_GetElement(ARR_Instance array, unsigned int index) +{ + assert(index < array->used); + return (void *)((char *)array->data + (size_t)index * array->elem_size); +} + +void * +ARR_GetElements(ARR_Instance array) +{ + /* Return a non-NULL pointer when the array has zero size */ + if (!array->data) { + assert(!array->used); + return array; + } + + return array->data; +} + +void +ARR_AppendElement(ARR_Instance array, void *element) +{ + void *e; + + e = ARR_GetNewElement(array); + memcpy(e, element, array->elem_size); +} + +void +ARR_SetSize(ARR_Instance array, unsigned int size) +{ + realloc_array(array, size); + array->used = size; +} + +unsigned int +ARR_GetSize(ARR_Instance array) +{ + return array->used; +} diff --git a/array.h b/array.h new file mode 100644 index 0000000..c812e84 --- /dev/null +++ b/array.h @@ -0,0 +1,56 @@ +/* + chronyd/chronyc - Programs for keeping computer clocks accurate. + + ********************************************************************** + * Copyright (C) Miroslav Lichvar 2014 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + ********************************************************************** + + ======================================================================= + + Header file for array functions. + */ + +#ifndef GOT_ARRAY_H +#define GOT_ARRAY_H + +typedef struct ARR_Instance_Record *ARR_Instance; + +/* Create a new array with given element size */ +extern ARR_Instance ARR_CreateInstance(unsigned int elem_size); + +/* Destroy the array */ +extern void ARR_DestroyInstance(ARR_Instance array); + +/* Return pointer to a new element added to the end of the array */ +extern void *ARR_GetNewElement(ARR_Instance array); + +/* Return element with given index */ +extern void *ARR_GetElement(ARR_Instance array, unsigned int index); + +/* Return pointer to the internal array of elements */ +extern void *ARR_GetElements(ARR_Instance array); + +/* Add a new element to the end of the array */ +extern void ARR_AppendElement(ARR_Instance array, void *element); + +/* Set the size of the array */ +extern void ARR_SetSize(ARR_Instance array, unsigned int size); + +/* Return current size of the array */ +extern unsigned int ARR_GetSize(ARR_Instance array); + +#endif diff --git a/candm.h b/candm.h new file mode 100644 index 0000000..7c36779 --- /dev/null +++ b/candm.h @@ -0,0 +1,816 @@ +/* + chronyd/chronyc - Programs for keeping computer clocks accurate. + + ********************************************************************** + * Copyright (C) Richard P. Curnow 1997-2003 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + ********************************************************************** + + ======================================================================= + + Definitions for the network protocol used for command and monitoring + of the timeserver. + + */ + +#ifndef GOT_CANDM_H +#define GOT_CANDM_H + +#include "sysincl.h" +#include "addressing.h" + +/* This is the default port to use for CANDM, if no alternative is + defined */ +#define DEFAULT_CANDM_PORT 323 + +/* Request codes */ +#define REQ_NULL 0 +#define REQ_ONLINE 1 +#define REQ_OFFLINE 2 +#define REQ_BURST 3 +#define REQ_MODIFY_MINPOLL 4 +#define REQ_MODIFY_MAXPOLL 5 +#define REQ_DUMP 6 +#define REQ_MODIFY_MAXDELAY 7 +#define REQ_MODIFY_MAXDELAYRATIO 8 +#define REQ_MODIFY_MAXUPDATESKEW 9 +#define REQ_LOGON 10 +#define REQ_SETTIME 11 +#define REQ_LOCAL 12 +#define REQ_MANUAL 13 +#define REQ_N_SOURCES 14 +#define REQ_SOURCE_DATA 15 +#define REQ_REKEY 16 +#define REQ_ALLOW 17 +#define REQ_ALLOWALL 18 +#define REQ_DENY 19 +#define REQ_DENYALL 20 +#define REQ_CMDALLOW 21 +#define REQ_CMDALLOWALL 22 +#define REQ_CMDDENY 23 +#define REQ_CMDDENYALL 24 +#define REQ_ACCHECK 25 +#define REQ_CMDACCHECK 26 +#define REQ_ADD_SERVER 27 +#define REQ_ADD_PEER 28 +#define REQ_DEL_SOURCE 29 +#define REQ_WRITERTC 30 +#define REQ_DFREQ 31 +#define REQ_DOFFSET 32 +#define REQ_TRACKING 33 +#define REQ_SOURCESTATS 34 +#define REQ_RTCREPORT 35 +#define REQ_TRIMRTC 36 +#define REQ_CYCLELOGS 37 +#define REQ_SUBNETS_ACCESSED 38 +#define REQ_CLIENT_ACCESSES 39 +#define REQ_CLIENT_ACCESSES_BY_INDEX 40 +#define REQ_MANUAL_LIST 41 +#define REQ_MANUAL_DELETE 42 +#define REQ_MAKESTEP 43 +#define REQ_ACTIVITY 44 +#define REQ_MODIFY_MINSTRATUM 45 +#define REQ_MODIFY_POLLTARGET 46 +#define REQ_MODIFY_MAXDELAYDEVRATIO 47 +#define REQ_RESELECT 48 +#define REQ_RESELECTDISTANCE 49 +#define REQ_MODIFY_MAKESTEP 50 +#define REQ_SMOOTHING 51 +#define REQ_SMOOTHTIME 52 +#define REQ_REFRESH 53 +#define REQ_SERVER_STATS 54 +#define REQ_CLIENT_ACCESSES_BY_INDEX2 55 +#define REQ_LOCAL2 56 +#define REQ_NTP_DATA 57 +#define REQ_ADD_SERVER2 58 +#define REQ_ADD_PEER2 59 +#define REQ_ADD_SERVER3 60 +#define REQ_ADD_PEER3 61 +#define REQ_SHUTDOWN 62 +#define REQ_ONOFFLINE 63 +#define REQ_ADD_SOURCE 64 +#define REQ_NTP_SOURCE_NAME 65 +#define REQ_RESET_SOURCES 66 +#define REQ_AUTH_DATA 67 +#define REQ_CLIENT_ACCESSES_BY_INDEX3 68 +#define REQ_SELECT_DATA 69 +#define REQ_RELOAD_SOURCES 70 +#define N_REQUEST_TYPES 71 + +/* Structure used to exchange timespecs independent of time_t size */ +typedef struct { + uint32_t tv_sec_high; + uint32_t tv_sec_low; + uint32_t tv_nsec; +} Timespec; + +/* This is used in tv_sec_high for 32-bit timestamps */ +#define TV_NOHIGHSEC 0x7fffffff + +/* 32-bit floating-point format consisting of 7-bit signed exponent + and 25-bit signed coefficient without hidden bit. + The result is calculated as: 2^(exp - 25) * coef */ +typedef struct { + int32_t f; +} Float; + +/* The EOR (end of record) fields are used by the offsetof operator in + pktlength.c, to get the number of bytes that ought to be + transmitted for each packet type. */ + +typedef struct { + int32_t EOR; +} REQ_Null; + +typedef struct { + IPAddr mask; + IPAddr address; + int32_t EOR; +} REQ_Online; + +typedef struct { + IPAddr mask; + IPAddr address; + int32_t EOR; +} REQ_Offline; + +typedef struct { + IPAddr mask; + IPAddr address; + int32_t n_good_samples; + int32_t n_total_samples; + int32_t EOR; +} REQ_Burst; + +typedef struct { + IPAddr address; + int32_t new_minpoll; + int32_t EOR; +} REQ_Modify_Minpoll; + +typedef struct { + IPAddr address; + int32_t new_maxpoll; + int32_t EOR; +} REQ_Modify_Maxpoll; + +typedef struct { + int32_t pad; + int32_t EOR; +} REQ_Dump; + +typedef struct { + IPAddr address; + Float new_max_delay; + int32_t EOR; +} REQ_Modify_Maxdelay; + +typedef struct { + IPAddr address; + Float new_max_delay_ratio; + int32_t EOR; +} REQ_Modify_Maxdelayratio; + +typedef struct { + IPAddr address; + Float new_max_delay_dev_ratio; + int32_t EOR; +} REQ_Modify_Maxdelaydevratio; + +typedef struct { + IPAddr address; + int32_t new_min_stratum; + int32_t EOR; +} REQ_Modify_Minstratum; + +typedef struct { + IPAddr address; + int32_t new_poll_target; + int32_t EOR; +} REQ_Modify_Polltarget; + +typedef struct { + Float new_max_update_skew; + int32_t EOR; +} REQ_Modify_Maxupdateskew; + +typedef struct { + int32_t limit; + Float threshold; + int32_t EOR; +} REQ_Modify_Makestep; + +typedef struct { + Timespec ts; + int32_t EOR; +} REQ_Logon; + +typedef struct { + Timespec ts; + int32_t EOR; +} REQ_Settime; + +typedef struct { + int32_t on_off; + int32_t stratum; + Float distance; + int32_t orphan; + int32_t EOR; +} REQ_Local; + +typedef struct { + int32_t option; + int32_t EOR; +} REQ_Manual; + +typedef struct { + int32_t index; + int32_t EOR; +} REQ_Source_Data; + +typedef struct { + IPAddr ip; + int32_t subnet_bits; + int32_t EOR; +} REQ_Allow_Deny; + +typedef struct { + IPAddr ip; + int32_t EOR; +} REQ_Ac_Check; + +/* Source types in NTP source requests */ +#define REQ_ADDSRC_SERVER 1 +#define REQ_ADDSRC_PEER 2 +#define REQ_ADDSRC_POOL 3 + +/* Flags used in NTP source requests */ +#define REQ_ADDSRC_ONLINE 0x1 +#define REQ_ADDSRC_AUTOOFFLINE 0x2 +#define REQ_ADDSRC_IBURST 0x4 +#define REQ_ADDSRC_PREFER 0x8 +#define REQ_ADDSRC_NOSELECT 0x10 +#define REQ_ADDSRC_TRUST 0x20 +#define REQ_ADDSRC_REQUIRE 0x40 +#define REQ_ADDSRC_INTERLEAVED 0x80 +#define REQ_ADDSRC_BURST 0x100 +#define REQ_ADDSRC_NTS 0x200 + +typedef struct { + uint32_t type; + uint8_t name[256]; + uint32_t port; + int32_t minpoll; + int32_t maxpoll; + int32_t presend_minpoll; + uint32_t min_stratum; + uint32_t poll_target; + uint32_t version; + uint32_t max_sources; + int32_t min_samples; + int32_t max_samples; + uint32_t authkey; + uint32_t nts_port; + Float max_delay; + Float max_delay_ratio; + Float max_delay_dev_ratio; + Float min_delay; + Float asymmetry; + Float offset; + uint32_t flags; + int32_t filter_length; + uint32_t reserved[3]; + int32_t EOR; +} REQ_NTP_Source; + +typedef struct { + IPAddr ip_addr; + int32_t EOR; +} REQ_Del_Source; + +typedef struct { + Float dfreq; + int32_t EOR; +} REQ_Dfreq; + +typedef struct { + int32_t sec; + int32_t usec; + int32_t EOR; +} REQ_Doffset; + +typedef struct { + uint32_t index; + int32_t EOR; +} REQ_Sourcestats; + +/* This is based on the response size rather than the + request size */ +#define MAX_CLIENT_ACCESSES 8 + +typedef struct { + uint32_t first_index; + uint32_t n_clients; + uint32_t min_hits; + uint32_t reset; + int32_t EOR; +} REQ_ClientAccessesByIndex; + +typedef struct { + int32_t index; + int32_t EOR; +} REQ_ManualDelete; + +typedef struct { + Float distance; + int32_t EOR; +} REQ_ReselectDistance; + +#define REQ_SMOOTHTIME_RESET 0 +#define REQ_SMOOTHTIME_ACTIVATE 1 + +typedef struct { + int32_t option; + int32_t EOR; +} REQ_SmoothTime; + +typedef struct { + IPAddr ip_addr; + int32_t EOR; +} REQ_NTPData; + +typedef struct { + IPAddr ip_addr; + int32_t EOR; +} REQ_NTPSourceName; + +typedef struct { + IPAddr ip_addr; + int32_t EOR; +} REQ_AuthData; + +typedef struct { + uint32_t index; + int32_t EOR; +} REQ_SelectData; + +/* ================================================== */ + +#define PKT_TYPE_CMD_REQUEST 1 +#define PKT_TYPE_CMD_REPLY 2 + +/* This version number needs to be incremented whenever the packet + size and/or the format of any of the existing messages is changed. + Other changes, e.g. new command types, should be handled cleanly by + client.c and cmdmon.c anyway, so the version can stay the same. + + Version 1 : original version with fixed size packets + + Version 2 : both command and reply packet sizes made capable of + being variable length. + + Version 3 : NTP_Source message lengthened (auto_offline) + + Version 4 : IPv6 addressing added, 64-bit time values, sourcestats + and tracking reports extended, added flags to NTP source request, + trimmed source report, replaced fixed-point format with floating-point + and used also instead of integer microseconds, new commands: modify stratum, + modify polltarget, modify maxdelaydevratio, reselect, reselectdistance + + Version 5 : auth data moved to the end of the packet to allow hashes with + different sizes, extended sources, tracking and activity reports, dropped + subnets accessed and client accesses + + Version 6 : added padding to requests to prevent amplification attack, + changed maximum number of samples in manual list to 16, new commands: modify + makestep, smoothing, smoothtime + + Support for authentication was removed later in version 6 of the protocol + and commands that required authentication are allowed only locally over Unix + domain socket. + + Version 6 (no authentication) : changed format of client accesses by index + (using new request/reply types) and manual timestamp, added new fields and + flags to NTP source request and report, made length of manual list constant, + added new commands: authdata, ntpdata, onoffline, refresh, reset, + selectdata, serverstats, shutdown, sourcename + */ + +#define PROTO_VERSION_NUMBER 6 + +/* The oldest protocol versions that are compatible enough with the current + version to report a version mismatch for the server and the client */ +#define PROTO_VERSION_MISMATCH_COMPAT_SERVER 5 +#define PROTO_VERSION_MISMATCH_COMPAT_CLIENT 4 + +/* The first protocol version using padding in requests */ +#define PROTO_VERSION_PADDING 6 + +/* The maximum length of padding in request packet, currently + defined by CLIENT_ACCESSES_BY_INDEX3 */ +#define MAX_PADDING_LENGTH 484 + +/* ================================================== */ + +typedef struct { + uint8_t version; /* Protocol version */ + uint8_t pkt_type; /* What sort of packet this is */ + uint8_t res1; + uint8_t res2; + uint16_t command; /* Which command is being issued */ + uint16_t attempt; /* How many resends the client has done + (count up from zero for same sequence + number) */ + uint32_t sequence; /* Client's sequence number */ + uint32_t pad1; + uint32_t pad2; + + union { + REQ_Null null; + REQ_Online online; + REQ_Offline offline; + REQ_Burst burst; + REQ_Modify_Minpoll modify_minpoll; + REQ_Modify_Maxpoll modify_maxpoll; + REQ_Dump dump; + REQ_Modify_Maxdelay modify_maxdelay; + REQ_Modify_Maxdelayratio modify_maxdelayratio; + REQ_Modify_Maxdelaydevratio modify_maxdelaydevratio; + REQ_Modify_Minstratum modify_minstratum; + REQ_Modify_Polltarget modify_polltarget; + REQ_Modify_Maxupdateskew modify_maxupdateskew; + REQ_Modify_Makestep modify_makestep; + REQ_Logon logon; + REQ_Settime settime; + REQ_Local local; + REQ_Manual manual; + REQ_Source_Data source_data; + REQ_Allow_Deny allow_deny; + REQ_Ac_Check ac_check; + REQ_NTP_Source ntp_source; + REQ_Del_Source del_source; + REQ_Dfreq dfreq; + REQ_Doffset doffset; + REQ_Sourcestats sourcestats; + REQ_ClientAccessesByIndex client_accesses_by_index; + REQ_ManualDelete manual_delete; + REQ_ReselectDistance reselect_distance; + REQ_SmoothTime smoothtime; + REQ_NTPData ntp_data; + REQ_NTPSourceName ntp_source_name; + REQ_AuthData auth_data; + REQ_SelectData select_data; + } data; /* Command specific parameters */ + + /* Padding used to prevent traffic amplification. It only defines the + maximum size of the packet, there is no hole after the data field. */ + uint8_t padding[MAX_PADDING_LENGTH]; + +} CMD_Request; + +/* ================================================== */ +/* Authority codes for command types */ + +#define PERMIT_OPEN 0 +#define PERMIT_LOCAL 1 +#define PERMIT_AUTH 2 + +/* ================================================== */ + +/* Reply codes */ +#define RPY_NULL 1 +#define RPY_N_SOURCES 2 +#define RPY_SOURCE_DATA 3 +#define RPY_MANUAL_TIMESTAMP 4 +#define RPY_TRACKING 5 +#define RPY_SOURCESTATS 6 +#define RPY_RTC 7 +#define RPY_SUBNETS_ACCESSED 8 +#define RPY_CLIENT_ACCESSES 9 +#define RPY_CLIENT_ACCESSES_BY_INDEX 10 +#define RPY_MANUAL_LIST 11 +#define RPY_ACTIVITY 12 +#define RPY_SMOOTHING 13 +#define RPY_SERVER_STATS 14 +#define RPY_CLIENT_ACCESSES_BY_INDEX2 15 +#define RPY_NTP_DATA 16 +#define RPY_MANUAL_TIMESTAMP2 17 +#define RPY_MANUAL_LIST2 18 +#define RPY_NTP_SOURCE_NAME 19 +#define RPY_AUTH_DATA 20 +#define RPY_CLIENT_ACCESSES_BY_INDEX3 21 +#define RPY_SERVER_STATS2 22 +#define RPY_SELECT_DATA 23 +#define N_REPLY_TYPES 24 + +/* Status codes */ +#define STT_SUCCESS 0 +#define STT_FAILED 1 +#define STT_UNAUTH 2 +#define STT_INVALID 3 +#define STT_NOSUCHSOURCE 4 +#define STT_INVALIDTS 5 +#define STT_NOTENABLED 6 +#define STT_BADSUBNET 7 +#define STT_ACCESSALLOWED 8 +#define STT_ACCESSDENIED 9 +/* Deprecated */ +#define STT_NOHOSTACCESS 10 +#define STT_SOURCEALREADYKNOWN 11 +#define STT_TOOMANYSOURCES 12 +#define STT_NORTC 13 +#define STT_BADRTCFILE 14 +#define STT_INACTIVE 15 +#define STT_BADSAMPLE 16 +#define STT_INVALIDAF 17 +#define STT_BADPKTVERSION 18 +#define STT_BADPKTLENGTH 19 +#define STT_INVALIDNAME 21 + +typedef struct { + int32_t EOR; +} RPY_Null; + +typedef struct { + uint32_t n_sources; + int32_t EOR; +} RPY_N_Sources; + +#define RPY_SD_MD_CLIENT 0 +#define RPY_SD_MD_PEER 1 +#define RPY_SD_MD_REF 2 + +#define RPY_SD_ST_SELECTED 0 +#define RPY_SD_ST_NONSELECTABLE 1 +#define RPY_SD_ST_FALSETICKER 2 +#define RPY_SD_ST_JITTERY 3 +#define RPY_SD_ST_UNSELECTED 4 +#define RPY_SD_ST_SELECTABLE 5 + +typedef struct { + IPAddr ip_addr; + int16_t poll; + uint16_t stratum; + uint16_t state; + uint16_t mode; + uint16_t flags; + uint16_t reachability; + uint32_t since_sample; + Float orig_latest_meas; + Float latest_meas; + Float latest_meas_err; + int32_t EOR; +} RPY_Source_Data; + +typedef struct { + uint32_t ref_id; + IPAddr ip_addr; + uint16_t stratum; + uint16_t leap_status; + Timespec ref_time; + Float current_correction; + Float last_offset; + Float rms_offset; + Float freq_ppm; + Float resid_freq_ppm; + Float skew_ppm; + Float root_delay; + Float root_dispersion; + Float last_update_interval; + int32_t EOR; +} RPY_Tracking; + +typedef struct { + uint32_t ref_id; + IPAddr ip_addr; + uint32_t n_samples; + uint32_t n_runs; + uint32_t span_seconds; + Float sd; + Float resid_freq_ppm; + Float skew_ppm; + Float est_offset; + Float est_offset_err; + int32_t EOR; +} RPY_Sourcestats; + +typedef struct { + Timespec ref_time; + uint16_t n_samples; + uint16_t n_runs; + uint32_t span_seconds; + Float rtc_seconds_fast; + Float rtc_gain_rate_ppm; + int32_t EOR; +} RPY_Rtc; + +typedef struct { + Float offset; + Float dfreq_ppm; + Float new_afreq_ppm; + int32_t EOR; +} RPY_ManualTimestamp; + +typedef struct { + IPAddr ip; + uint32_t ntp_hits; + uint32_t nke_hits; + uint32_t cmd_hits; + uint32_t ntp_drops; + uint32_t nke_drops; + uint32_t cmd_drops; + int8_t ntp_interval; + int8_t nke_interval; + int8_t cmd_interval; + int8_t ntp_timeout_interval; + uint32_t last_ntp_hit_ago; + uint32_t last_nke_hit_ago; + uint32_t last_cmd_hit_ago; +} RPY_ClientAccesses_Client; + +typedef struct { + uint32_t n_indices; /* how many indices there are in the server's table */ + uint32_t next_index; /* the index 1 beyond those processed on this call */ + uint32_t n_clients; /* the number of valid entries in the following array */ + RPY_ClientAccesses_Client clients[MAX_CLIENT_ACCESSES]; + int32_t EOR; +} RPY_ClientAccessesByIndex; + +typedef struct { + uint32_t ntp_hits; + uint32_t nke_hits; + uint32_t cmd_hits; + uint32_t ntp_drops; + uint32_t nke_drops; + uint32_t cmd_drops; + uint32_t log_drops; + uint32_t ntp_auth_hits; + int32_t EOR; +} RPY_ServerStats; + +#define MAX_MANUAL_LIST_SAMPLES 16 + +typedef struct { + Timespec when; + Float slewed_offset; + Float orig_offset; + Float residual; +} RPY_ManualListSample; + +typedef struct { + uint32_t n_samples; + RPY_ManualListSample samples[MAX_MANUAL_LIST_SAMPLES]; + int32_t EOR; +} RPY_ManualList; + +typedef struct { + int32_t online; + int32_t offline; + int32_t burst_online; + int32_t burst_offline; + int32_t unresolved; + int32_t EOR; +} RPY_Activity; + +#define RPY_SMT_FLAG_ACTIVE 0x1 +#define RPY_SMT_FLAG_LEAPONLY 0x2 + +typedef struct { + uint32_t flags; + Float offset; + Float freq_ppm; + Float wander_ppm; + Float last_update_ago; + Float remaining_time; + int32_t EOR; +} RPY_Smoothing; + +#define RPY_NTP_FLAGS_TESTS 0x3ff +#define RPY_NTP_FLAG_INTERLEAVED 0x4000 +#define RPY_NTP_FLAG_AUTHENTICATED 0x8000 + +typedef struct { + IPAddr remote_addr; + IPAddr local_addr; + uint16_t remote_port; + uint8_t leap; + uint8_t version; + uint8_t mode; + uint8_t stratum; + int8_t poll; + int8_t precision; + Float root_delay; + Float root_dispersion; + uint32_t ref_id; + Timespec ref_time; + Float offset; + Float peer_delay; + Float peer_dispersion; + Float response_time; + Float jitter_asymmetry; + uint16_t flags; + uint8_t tx_tss_char; + uint8_t rx_tss_char; + uint32_t total_tx_count; + uint32_t total_rx_count; + uint32_t total_valid_count; + uint32_t reserved[4]; + int32_t EOR; +} RPY_NTPData; + +typedef struct { + uint8_t name[256]; + int32_t EOR; +} RPY_NTPSourceName; + +#define RPY_AD_MD_NONE 0 +#define RPY_AD_MD_SYMMETRIC 1 +#define RPY_AD_MD_NTS 2 + +typedef struct { + uint16_t mode; + uint16_t key_type; + uint32_t key_id; + uint16_t key_length; + uint16_t ke_attempts; + uint32_t last_ke_ago; + uint16_t cookies; + uint16_t cookie_length; + uint16_t nak; + uint16_t pad; + int32_t EOR; +} RPY_AuthData; + +#define RPY_SD_OPTION_NOSELECT 0x1 +#define RPY_SD_OPTION_PREFER 0x2 +#define RPY_SD_OPTION_TRUST 0x4 +#define RPY_SD_OPTION_REQUIRE 0x8 + +typedef struct { + uint32_t ref_id; + IPAddr ip_addr; + uint8_t state_char; + uint8_t authentication; + uint8_t leap; + uint8_t pad; + uint16_t conf_options; + uint16_t eff_options; + uint32_t last_sample_ago; + Float score; + Float lo_limit; + Float hi_limit; + int32_t EOR; +} RPY_SelectData; + +typedef struct { + uint8_t version; + uint8_t pkt_type; + uint8_t res1; + uint8_t res2; + uint16_t command; /* Which command is being replied to */ + uint16_t reply; /* Which format of reply this is */ + uint16_t status; /* Status of command processing */ + uint16_t pad1; /* Padding for compatibility and 4 byte alignment */ + uint16_t pad2; + uint16_t pad3; + uint32_t sequence; /* Echo of client's sequence number */ + uint32_t pad4; + uint32_t pad5; + + union { + RPY_Null null; + RPY_N_Sources n_sources; + RPY_Source_Data source_data; + RPY_ManualTimestamp manual_timestamp; + RPY_Tracking tracking; + RPY_Sourcestats sourcestats; + RPY_Rtc rtc; + RPY_ClientAccessesByIndex client_accesses_by_index; + RPY_ServerStats server_stats; + RPY_ManualList manual_list; + RPY_Activity activity; + RPY_Smoothing smoothing; + RPY_NTPData ntp_data; + RPY_NTPSourceName ntp_source_name; + RPY_AuthData auth_data; + RPY_SelectData select_data; + } data; /* Reply specific parameters */ + +} CMD_Reply; + +/* ================================================== */ + +#endif /* GOT_CANDM_H */ diff --git a/client.c b/client.c new file mode 100644 index 0000000..f365f39 --- /dev/null +++ b/client.c @@ -0,0 +1,3604 @@ +/* + chronyd/chronyc - Programs for keeping computer clocks accurate. + + ********************************************************************** + * Copyright (C) Richard P. Curnow 1997-2003 + * Copyright (C) Lonnie Abelbeck 2016, 2018 + * Copyright (C) Miroslav Lichvar 2009-2020 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + ********************************************************************** + + ======================================================================= + + Command line client for configuring the daemon and obtaining status + from it whilst running. + */ + +#include "config.h" + +#include "sysincl.h" + +#include "array.h" +#include "candm.h" +#include "cmac.h" +#include "logging.h" +#include "memory.h" +#include "nameserv.h" +#include "getdate.h" +#include "cmdparse.h" +#include "pktlength.h" +#include "socket.h" +#include "util.h" + +#ifdef FEAT_READLINE +#include +#endif + +/* ================================================== */ + +struct Address { + SCK_AddressType type; + union { + IPSockAddr ip; + char *path; + } addr; +}; + +static ARR_Instance server_addresses; + +static int sock_fd = -1; + +static int quit = 0; + +static int on_terminal = 0; + +static int no_dns = 0; + +static int source_names = 0; + +static int csv_mode = 0; + +/* ================================================== */ +/* Log a message. This is a minimalistic replacement of the logging.c + implementation to avoid linking with it and other modules. */ + +LOG_Severity log_min_severity = LOGS_INFO; + +void LOG_Message(LOG_Severity severity, +#if DEBUG > 0 + int line_number, const char *filename, const char *function_name, +#endif + const char *format, ...) +{ + va_list ap; + + if (severity < log_min_severity) + return; + + va_start(ap, format); + vfprintf(stderr, format, ap); + putc('\n', stderr); + va_end(ap); +} + +/* ================================================== */ +/* Read a single line of commands from standard input */ + +#ifdef FEAT_READLINE +static char **command_name_completion(const char *text, int start, int end); +#endif + +static char * +read_line(void) +{ + static char line[2048]; + static const char *prompt = "chronyc> "; + + if (on_terminal) { +#ifdef FEAT_READLINE + char *cmd; + + rl_attempted_completion_function = command_name_completion; + rl_basic_word_break_characters = " \t\n\r"; + + /* save line only if not empty */ + cmd = readline(prompt); + if( cmd == NULL ) return( NULL ); + + /* user pressed return */ + if( *cmd != '\0' ) { + strncpy(line, cmd, sizeof(line) - 1); + line[sizeof(line) - 1] = '\0'; + add_history(cmd); + /* free the buffer allocated by readline */ + Free(cmd); + } else { + /* simulate the user has entered an empty line */ + *line = '\0'; + } + return( line ); +#else + printf("%s", prompt); + fflush(stdout); +#endif + } + if (fgets(line, sizeof(line), stdin)) { + return line; + } else { + return NULL; + } + +} + +/* ================================================== */ + +static ARR_Instance +get_addresses(const char *hostnames, int port) +{ + struct Address *addr; + ARR_Instance addrs; + char *hostname, *s1, *s2; + IPAddr ip_addrs[DNS_MAX_ADDRESSES]; + int i; + + addrs = ARR_CreateInstance(sizeof (*addr)); + s1 = Strdup(hostnames); + + /* Parse the comma-separated list of hostnames */ + for (hostname = s1; hostname && *hostname; hostname = s2) { + s2 = strchr(hostname, ','); + if (s2) + *s2++ = '\0'; + + /* hostname starting with / is considered a path of Unix domain socket */ + if (hostname[0] == '/') { + addr = ARR_GetNewElement(addrs); + addr->type = SCK_ADDR_UNIX; + addr->addr.path = Strdup(hostname); + } else { + if (DNS_Name2IPAddress(hostname, ip_addrs, DNS_MAX_ADDRESSES) != DNS_Success) { + DEBUG_LOG("Could not get IP address for %s", hostname); + continue; + } + + for (i = 0; i < DNS_MAX_ADDRESSES && ip_addrs[i].family != IPADDR_UNSPEC; i++) { + addr = ARR_GetNewElement(addrs); + addr->type = SCK_ADDR_IP; + addr->addr.ip.ip_addr = ip_addrs[i]; + addr->addr.ip.port = port; + DEBUG_LOG("Resolved %s to %s", hostname, UTI_IPToString(&ip_addrs[i])); + } + } + } + + Free(s1); + return addrs; +} + +/* ================================================== */ + +static void +free_addresses(ARR_Instance addresses) +{ + struct Address *addr; + unsigned int i; + + for (i = 0; i < ARR_GetSize(addresses); i++) { + addr = ARR_GetElement(addresses, i); + + if (addr->type == SCK_ADDR_UNIX) + Free(addr->addr.path); + } + + ARR_DestroyInstance(addresses); +} + +/* ================================================== */ +/* Initialise the socket used to talk to the daemon */ + +static int +open_socket(struct Address *addr) +{ + char *dir, *local_addr; + size_t local_addr_len; + + switch (addr->type) { + case SCK_ADDR_IP: + sock_fd = SCK_OpenUdpSocket(&addr->addr.ip, NULL, NULL, 0); + break; + case SCK_ADDR_UNIX: + /* Construct path of our socket. Use the same directory as the server + socket and include our process ID to allow multiple chronyc instances + running at the same time. */ + + dir = UTI_PathToDir(addr->addr.path); + local_addr_len = strlen(dir) + 50; + local_addr = Malloc(local_addr_len); + + snprintf(local_addr, local_addr_len, "%s/chronyc.%d.sock", dir, (int)getpid()); + + sock_fd = SCK_OpenUnixDatagramSocket(addr->addr.path, local_addr, + SCK_FLAG_ALL_PERMISSIONS); + Free(dir); + Free(local_addr); + + break; + default: + assert(0); + } + + if (sock_fd < 0) + return 0; + + return 1; +} + +/* ================================================== */ + +static void +close_io(void) +{ + if (sock_fd < 0) + return; + + SCK_RemoveSocket(sock_fd); + SCK_CloseSocket(sock_fd); + sock_fd = -1; +} + +/* ================================================== */ + +static int +open_io(void) +{ + static unsigned int address_index = 0; + struct Address *addr; + + /* If a socket is already opened, close it and try the next address */ + if (sock_fd >= 0) { + close_io(); + address_index++; + } + + /* Find an address for which a socket can be opened and connected */ + for (; address_index < ARR_GetSize(server_addresses); address_index++) { + addr = ARR_GetElement(server_addresses, address_index); + + if (open_socket(addr)) + return 1; + + close_io(); + } + + return 0; +} + +/* ================================================== */ + +static void +bits_to_mask(int bits, int family, IPAddr *mask) +{ + int i; + + mask->family = family; + switch (family) { + case IPADDR_INET4: + if (bits > 32 || bits < 0) + bits = 32; + if (bits > 0) { + mask->addr.in4 = -1; + mask->addr.in4 <<= 32 - bits; + } else { + mask->addr.in4 = 0; + } + break; + case IPADDR_INET6: + if (bits > 128 || bits < 0) + bits = 128; + for (i = 0; i < bits / 8; i++) + mask->addr.in6[i] = 0xff; + if (i < 16) + mask->addr.in6[i++] = (0xff << (8 - bits % 8)) & 0xff; + for (; i < 16; i++) + mask->addr.in6[i] = 0x0; + break; + case IPADDR_ID: + mask->family = IPADDR_UNSPEC; + break; + default: + assert(0); + } +} + +/* ================================================== */ + +static int +parse_source_address(char *word, IPAddr *address) +{ + if (UTI_StringToIdIP(word, address)) + return 1; + + if (DNS_Name2IPAddress(word, address, 1) == DNS_Success) + return 1; + + return 0; +} + +/* ================================================== */ + +static int +read_mask_address(char *line, IPAddr *mask, IPAddr *address) +{ + unsigned int bits; + char *p, *q; + + p = line; + if (!*p) { + mask->family = address->family = IPADDR_UNSPEC; + return 1; + } else { + q = strchr(p, '/'); + if (q) { + *q++ = 0; + if (UTI_StringToIP(p, mask)) { + p = q; + if (UTI_StringToIP(p, address)) { + if (address->family == mask->family) + return 1; + } else if (sscanf(p, "%u", &bits) == 1) { + *address = *mask; + bits_to_mask(bits, address->family, mask); + return 1; + } + } + } else { + if (parse_source_address(p, address)) { + bits_to_mask(-1, address->family, mask); + return 1; + } else { + LOG(LOGS_ERR, "Could not get address for hostname"); + return 0; + } + } + } + + LOG(LOGS_ERR, "Invalid syntax for mask/address"); + return 0; +} + +/* ================================================== */ + +static int +process_cmd_offline(CMD_Request *msg, char *line) +{ + IPAddr mask, address; + int ok; + + if (read_mask_address(line, &mask, &address)) { + UTI_IPHostToNetwork(&mask, &msg->data.offline.mask); + UTI_IPHostToNetwork(&address, &msg->data.offline.address); + msg->command = htons(REQ_OFFLINE); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + + +static int +process_cmd_online(CMD_Request *msg, char *line) +{ + IPAddr mask, address; + int ok; + + if (read_mask_address(line, &mask, &address)) { + UTI_IPHostToNetwork(&mask, &msg->data.online.mask); + UTI_IPHostToNetwork(&address, &msg->data.online.address); + msg->command = htons(REQ_ONLINE); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + +static void +process_cmd_onoffline(CMD_Request *msg, char *line) +{ + msg->command = htons(REQ_ONOFFLINE); +} + +/* ================================================== */ + +static int +read_address_integer(char *line, IPAddr *address, int *value) +{ + char *hostname; + int ok = 0; + + hostname = line; + line = CPS_SplitWord(line); + + if (sscanf(line, "%d", value) != 1) { + LOG(LOGS_ERR, "Invalid syntax for address value"); + ok = 0; + } else { + if (!parse_source_address(hostname, address)) { + LOG(LOGS_ERR, "Could not get address for hostname"); + ok = 0; + } else { + ok = 1; + } + } + + return ok; + +} + + +/* ================================================== */ + +static int +read_address_double(char *line, IPAddr *address, double *value) +{ + char *hostname; + int ok = 0; + + hostname = line; + line = CPS_SplitWord(line); + + if (sscanf(line, "%lf", value) != 1) { + LOG(LOGS_ERR, "Invalid syntax for address value"); + ok = 0; + } else { + if (!parse_source_address(hostname, address)) { + LOG(LOGS_ERR, "Could not get address for hostname"); + ok = 0; + } else { + ok = 1; + } + } + + return ok; + +} + + +/* ================================================== */ + +static int +process_cmd_minpoll(CMD_Request *msg, char *line) +{ + IPAddr address; + int minpoll; + int ok; + + if (read_address_integer(line, &address, &minpoll)) { + UTI_IPHostToNetwork(&address, &msg->data.modify_minpoll.address); + msg->data.modify_minpoll.new_minpoll = htonl(minpoll); + msg->command = htons(REQ_MODIFY_MINPOLL); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + +static int +process_cmd_maxpoll(CMD_Request *msg, char *line) +{ + IPAddr address; + int maxpoll; + int ok; + + if (read_address_integer(line, &address, &maxpoll)) { + UTI_IPHostToNetwork(&address, &msg->data.modify_maxpoll.address); + msg->data.modify_maxpoll.new_maxpoll = htonl(maxpoll); + msg->command = htons(REQ_MODIFY_MAXPOLL); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + +static int +process_cmd_maxdelay(CMD_Request *msg, char *line) +{ + IPAddr address; + double max_delay; + int ok; + + if (read_address_double(line, &address, &max_delay)) { + UTI_IPHostToNetwork(&address, &msg->data.modify_maxdelay.address); + msg->data.modify_maxdelay.new_max_delay = UTI_FloatHostToNetwork(max_delay); + msg->command = htons(REQ_MODIFY_MAXDELAY); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + +static int +process_cmd_maxdelaydevratio(CMD_Request *msg, char *line) +{ + IPAddr address; + double max_delay_dev_ratio; + int ok; + + if (read_address_double(line, &address, &max_delay_dev_ratio)) { + UTI_IPHostToNetwork(&address, &msg->data.modify_maxdelaydevratio.address); + msg->data.modify_maxdelayratio.new_max_delay_ratio = UTI_FloatHostToNetwork(max_delay_dev_ratio); + msg->command = htons(REQ_MODIFY_MAXDELAYDEVRATIO); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + +static int +process_cmd_maxdelayratio(CMD_Request *msg, char *line) +{ + IPAddr address; + double max_delay_ratio; + int ok; + + if (read_address_double(line, &address, &max_delay_ratio)) { + UTI_IPHostToNetwork(&address, &msg->data.modify_maxdelayratio.address); + msg->data.modify_maxdelayratio.new_max_delay_ratio = UTI_FloatHostToNetwork(max_delay_ratio); + msg->command = htons(REQ_MODIFY_MAXDELAYRATIO); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + +static int +process_cmd_minstratum(CMD_Request *msg, char *line) +{ + IPAddr address; + int min_stratum; + int ok; + + if (read_address_integer(line, &address, &min_stratum)) { + UTI_IPHostToNetwork(&address, &msg->data.modify_minstratum.address); + msg->data.modify_minstratum.new_min_stratum = htonl(min_stratum); + msg->command = htons(REQ_MODIFY_MINSTRATUM); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + +static int +process_cmd_polltarget(CMD_Request *msg, char *line) +{ + IPAddr address; + int poll_target; + int ok; + + if (read_address_integer(line, &address, &poll_target)) { + UTI_IPHostToNetwork(&address, &msg->data.modify_polltarget.address); + msg->data.modify_polltarget.new_poll_target = htonl(poll_target); + msg->command = htons(REQ_MODIFY_POLLTARGET); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + +static int +process_cmd_maxupdateskew(CMD_Request *msg, char *line) +{ + int ok; + double new_max_update_skew; + + if (sscanf(line, "%lf", &new_max_update_skew) == 1) { + msg->data.modify_maxupdateskew.new_max_update_skew = UTI_FloatHostToNetwork(new_max_update_skew); + msg->command = htons(REQ_MODIFY_MAXUPDATESKEW); + ok = 1; + } else { + ok = 0; + } + + return ok; + +} + +/* ================================================== */ + +static void +process_cmd_dump(CMD_Request *msg, char *line) +{ + msg->command = htons(REQ_DUMP); + msg->data.dump.pad = htonl(0); +} + +/* ================================================== */ + +static void +process_cmd_writertc(CMD_Request *msg, char *line) +{ + msg->command = htons(REQ_WRITERTC); +} + +/* ================================================== */ + +static void +process_cmd_trimrtc(CMD_Request *msg, char *line) +{ + msg->command = htons(REQ_TRIMRTC); +} + +/* ================================================== */ + +static void +process_cmd_cyclelogs(CMD_Request *msg, char *line) +{ + msg->command = htons(REQ_CYCLELOGS); +} + +/* ================================================== */ + +static int +process_cmd_burst(CMD_Request *msg, char *line) +{ + int n_good_samples, n_total_samples; + char *s1, *s2; + IPAddr address, mask; + + s1 = line; + s2 = CPS_SplitWord(s1); + CPS_SplitWord(s2); + + if (sscanf(s1, "%d/%d", &n_good_samples, &n_total_samples) != 2) { + LOG(LOGS_ERR, "Invalid syntax for burst command"); + return 0; + } + + mask.family = address.family = IPADDR_UNSPEC; + if (*s2 && !read_mask_address(s2, &mask, &address)) { + return 0; + } + + msg->command = htons(REQ_BURST); + msg->data.burst.n_good_samples = ntohl(n_good_samples); + msg->data.burst.n_total_samples = ntohl(n_total_samples); + + UTI_IPHostToNetwork(&mask, &msg->data.burst.mask); + UTI_IPHostToNetwork(&address, &msg->data.burst.address); + + return 1; +} + +/* ================================================== */ + +static int +process_cmd_local(CMD_Request *msg, char *line) +{ + int on_off, stratum = 0, orphan = 0; + double distance = 0.0; + + if (!strcmp(line, "off")) { + on_off = 0; + } else if (CPS_ParseLocal(line, &stratum, &orphan, &distance)) { + on_off = 1; + } else { + LOG(LOGS_ERR, "Invalid syntax for local command"); + return 0; + } + + msg->command = htons(REQ_LOCAL2); + msg->data.local.on_off = htonl(on_off); + msg->data.local.stratum = htonl(stratum); + msg->data.local.distance = UTI_FloatHostToNetwork(distance); + msg->data.local.orphan = htonl(orphan); + + return 1; +} + +/* ================================================== */ + +static int +process_cmd_manual(CMD_Request *msg, const char *line) +{ + const char *p; + + p = line; + + if (!strcmp(p, "off")) { + msg->data.manual.option = htonl(0); + } else if (!strcmp(p, "on")) { + msg->data.manual.option = htonl(1); + } else if (!strcmp(p, "reset")) { + msg->data.manual.option = htonl(2); + } else { + LOG(LOGS_ERR, "Invalid syntax for manual command"); + return 0; + } + msg->command = htons(REQ_MANUAL); + + return 1; +} + +/* ================================================== */ + +static int +parse_allow_deny(CMD_Request *msg, char *line) +{ + unsigned long a, b, c, d; + int n, specified_subnet_bits; + IPAddr ip; + char *p; + + p = line; + if (!*p) { + /* blank line - applies to all addresses */ + ip.family = IPADDR_UNSPEC; + UTI_IPHostToNetwork(&ip, &msg->data.allow_deny.ip); + msg->data.allow_deny.subnet_bits = htonl(0); + } else { + char *slashpos; + slashpos = strchr(p, '/'); + if (slashpos) *slashpos = 0; + + n = 0; + if (!UTI_StringToIP(p, &ip) && + (n = sscanf(p, "%lu.%lu.%lu.%lu", &a, &b, &c, &d)) <= 0) { + + /* Try to parse as the name of a machine */ + if (slashpos || DNS_Name2IPAddress(p, &ip, 1) != DNS_Success) { + LOG(LOGS_ERR, "Could not read address"); + return 0; + } else { + UTI_IPHostToNetwork(&ip, &msg->data.allow_deny.ip); + if (ip.family == IPADDR_INET6) + msg->data.allow_deny.subnet_bits = htonl(128); + else + msg->data.allow_deny.subnet_bits = htonl(32); + } + } else { + + if (n == 0) { + if (ip.family == IPADDR_INET6) + msg->data.allow_deny.subnet_bits = htonl(128); + else + msg->data.allow_deny.subnet_bits = htonl(32); + } else { + ip.family = IPADDR_INET4; + + a &= 0xff; + b &= 0xff; + c &= 0xff; + d &= 0xff; + + switch (n) { + case 1: + ip.addr.in4 = htonl((a<<24)); + msg->data.allow_deny.subnet_bits = htonl(8); + break; + case 2: + ip.addr.in4 = htonl((a<<24) | (b<<16)); + msg->data.allow_deny.subnet_bits = htonl(16); + break; + case 3: + ip.addr.in4 = htonl((a<<24) | (b<<16) | (c<<8)); + msg->data.allow_deny.subnet_bits = htonl(24); + break; + case 4: + ip.addr.in4 = htonl((a<<24) | (b<<16) | (c<<8) | d); + msg->data.allow_deny.subnet_bits = htonl(32); + break; + default: + assert(0); + } + } + + UTI_IPHostToNetwork(&ip, &msg->data.allow_deny.ip); + + if (slashpos) { + n = sscanf(slashpos+1, "%d", &specified_subnet_bits); + if (n == 1) { + msg->data.allow_deny.subnet_bits = htonl(specified_subnet_bits); + } else { + LOG(LOGS_WARN, "Warning: badly formatted subnet size, using %d", + (int)ntohl(msg->data.allow_deny.subnet_bits)); + } + } + } + } + return 1; +} + +/* ================================================== */ + +static int +process_cmd_allow(CMD_Request *msg, char *line) +{ + int status; + msg->command = htons(REQ_ALLOW); + status = parse_allow_deny(msg, line); + return status; +} + +/* ================================================== */ + +static int +process_cmd_allowall(CMD_Request *msg, char *line) +{ + int status; + msg->command = htons(REQ_ALLOWALL); + status = parse_allow_deny(msg, line); + return status; +} + +/* ================================================== */ + +static int +process_cmd_deny(CMD_Request *msg, char *line) +{ + int status; + msg->command = htons(REQ_DENY); + status = parse_allow_deny(msg, line); + return status; +} + +/* ================================================== */ + +static int +process_cmd_denyall(CMD_Request *msg, char *line) +{ + int status; + msg->command = htons(REQ_DENYALL); + status = parse_allow_deny(msg, line); + return status; +} + +/* ================================================== */ + +static int +process_cmd_cmdallow(CMD_Request *msg, char *line) +{ + int status; + msg->command = htons(REQ_CMDALLOW); + status = parse_allow_deny(msg, line); + return status; +} + +/* ================================================== */ + +static int +process_cmd_cmdallowall(CMD_Request *msg, char *line) +{ + int status; + msg->command = htons(REQ_CMDALLOWALL); + status = parse_allow_deny(msg, line); + return status; +} + +/* ================================================== */ + +static int +process_cmd_cmddeny(CMD_Request *msg, char *line) +{ + int status; + msg->command = htons(REQ_CMDDENY); + status = parse_allow_deny(msg, line); + return status; +} + +/* ================================================== */ + +static int +process_cmd_cmddenyall(CMD_Request *msg, char *line) +{ + int status; + msg->command = htons(REQ_CMDDENYALL); + status = parse_allow_deny(msg, line); + return status; +} + +/* ================================================== */ + +static int +process_cmd_accheck(CMD_Request *msg, char *line) +{ + IPAddr ip; + msg->command = htons(REQ_ACCHECK); + if (DNS_Name2IPAddress(line, &ip, 1) == DNS_Success) { + UTI_IPHostToNetwork(&ip, &msg->data.ac_check.ip); + return 1; + } else { + LOG(LOGS_ERR, "Could not read address"); + return 0; + } +} + +/* ================================================== */ + +static int +process_cmd_cmdaccheck(CMD_Request *msg, char *line) +{ + IPAddr ip; + msg->command = htons(REQ_CMDACCHECK); + if (DNS_Name2IPAddress(line, &ip, 1) == DNS_Success) { + UTI_IPHostToNetwork(&ip, &msg->data.ac_check.ip); + return 1; + } else { + LOG(LOGS_ERR, "Could not read address"); + return 0; + } +} + +/* ================================================== */ + +static void +process_cmd_dfreq(CMD_Request *msg, char *line) +{ + double dfreq; + msg->command = htons(REQ_DFREQ); + if (sscanf(line, "%lf", &dfreq) == 1) { + msg->data.dfreq.dfreq = UTI_FloatHostToNetwork(dfreq); + } else { + msg->data.dfreq.dfreq = UTI_FloatHostToNetwork(0.0); + } +} + +/* ================================================== */ + +static void +process_cmd_doffset(CMD_Request *msg, char *line) +{ + struct timeval tv; + double doffset; + + msg->command = htons(REQ_DOFFSET); + if (sscanf(line, "%lf", &doffset) == 1) { + UTI_DoubleToTimeval(doffset, &tv); + msg->data.doffset.sec = htonl(tv.tv_sec); + msg->data.doffset.usec = htonl(tv.tv_usec); + } else { + msg->data.doffset.sec = htonl(0); + msg->data.doffset.usec = htonl(0); + } +} + +/* ================================================== */ + +static int +process_cmd_add_source(CMD_Request *msg, char *line) +{ + CPS_NTP_Source data; + IPAddr ip_addr; + int result = 0, status, type; + const char *opt_name, *word; + + msg->command = htons(REQ_ADD_SOURCE); + + word = line; + line = CPS_SplitWord(line); + + if (!strcasecmp(word, "server")) { + type = REQ_ADDSRC_SERVER; + } else if (!strcasecmp(word, "peer")) { + type = REQ_ADDSRC_PEER; + } else if (!strcasecmp(word, "pool")) { + type = REQ_ADDSRC_POOL; + } else { + LOG(LOGS_ERR, "Invalid syntax for add command"); + return 0; + } + + status = CPS_ParseNTPSourceAdd(line, &data); + switch (status) { + case 0: + LOG(LOGS_ERR, "Invalid syntax for add command"); + break; + default: + /* Verify that the address is resolvable (chronyc and chronyd are + assumed to be running on the same host) */ + if (strlen(data.name) >= sizeof (msg->data.ntp_source.name) || + DNS_Name2IPAddress(data.name, &ip_addr, 1) != DNS_Success) { + LOG(LOGS_ERR, "Invalid host/IP address"); + break; + } + + opt_name = NULL; + if (opt_name) { + LOG(LOGS_ERR, "%s can't be set in chronyc", opt_name); + break; + } + + msg->data.ntp_source.type = htonl(type); + if (strlen(data.name) >= sizeof (msg->data.ntp_source.name)) + assert(0); + strncpy((char *)msg->data.ntp_source.name, data.name, + sizeof (msg->data.ntp_source.name)); + msg->data.ntp_source.port = htonl(data.port); + msg->data.ntp_source.minpoll = htonl(data.params.minpoll); + msg->data.ntp_source.maxpoll = htonl(data.params.maxpoll); + msg->data.ntp_source.presend_minpoll = htonl(data.params.presend_minpoll); + msg->data.ntp_source.min_stratum = htonl(data.params.min_stratum); + msg->data.ntp_source.poll_target = htonl(data.params.poll_target); + msg->data.ntp_source.version = htonl(data.params.version); + msg->data.ntp_source.max_sources = htonl(data.params.max_sources); + msg->data.ntp_source.min_samples = htonl(data.params.min_samples); + msg->data.ntp_source.max_samples = htonl(data.params.max_samples); + msg->data.ntp_source.authkey = htonl(data.params.authkey); + msg->data.ntp_source.nts_port = htonl(data.params.nts_port); + msg->data.ntp_source.max_delay = UTI_FloatHostToNetwork(data.params.max_delay); + msg->data.ntp_source.max_delay_ratio = UTI_FloatHostToNetwork(data.params.max_delay_ratio); + msg->data.ntp_source.max_delay_dev_ratio = + UTI_FloatHostToNetwork(data.params.max_delay_dev_ratio); + msg->data.ntp_source.min_delay = UTI_FloatHostToNetwork(data.params.min_delay); + msg->data.ntp_source.asymmetry = UTI_FloatHostToNetwork(data.params.asymmetry); + msg->data.ntp_source.offset = UTI_FloatHostToNetwork(data.params.offset); + msg->data.ntp_source.flags = htonl( + (data.params.connectivity == SRC_ONLINE ? REQ_ADDSRC_ONLINE : 0) | + (data.params.auto_offline ? REQ_ADDSRC_AUTOOFFLINE : 0) | + (data.params.iburst ? REQ_ADDSRC_IBURST : 0) | + (data.params.interleaved ? REQ_ADDSRC_INTERLEAVED : 0) | + (data.params.burst ? REQ_ADDSRC_BURST : 0) | + (data.params.nts ? REQ_ADDSRC_NTS : 0) | + (data.params.sel_options & SRC_SELECT_PREFER ? REQ_ADDSRC_PREFER : 0) | + (data.params.sel_options & SRC_SELECT_NOSELECT ? REQ_ADDSRC_NOSELECT : 0) | + (data.params.sel_options & SRC_SELECT_TRUST ? REQ_ADDSRC_TRUST : 0) | + (data.params.sel_options & SRC_SELECT_REQUIRE ? REQ_ADDSRC_REQUIRE : 0)); + msg->data.ntp_source.filter_length = htonl(data.params.filter_length); + memset(msg->data.ntp_source.reserved, 0, sizeof (msg->data.ntp_source.reserved)); + + result = 1; + + break; + } + + return result; +} + +/* ================================================== */ + +static int +process_cmd_delete(CMD_Request *msg, char *line) +{ + char *hostname; + int ok = 0; + IPAddr address; + + msg->command = htons(REQ_DEL_SOURCE); + hostname = line; + CPS_SplitWord(line); + + if (!*hostname) { + LOG(LOGS_ERR, "Invalid syntax for address"); + ok = 0; + } else { + if (!parse_source_address(hostname, &address)) { + LOG(LOGS_ERR, "Could not get address for hostname"); + ok = 0; + } else { + UTI_IPHostToNetwork(&address, &msg->data.del_source.ip_addr); + ok = 1; + } + } + + return ok; + +} + +/* ================================================== */ + +static void +give_help(void) +{ + int line, len; + const char *s, cols[] = + "System clock:\0\0" + "tracking\0Display system time information\0" + "makestep\0Correct clock by stepping immediately\0" + "makestep \0Configure automatic clock stepping\0" + "maxupdateskew \0Modify maximum valid skew to update frequency\0" + "waitsync [ [ [ []]]]\0" + "Wait until synchronised in specified limits\0" + "\0\0" + "Time sources:\0\0" + "sources [-a] [-v]\0Display information about current sources\0" + "sourcestats [-a] [-v]\0Display statistics about collected measurements\0" + "selectdata [-a] [-v]\0Display information about source selection\0" + "reselect\0Force reselecting synchronisation source\0" + "reselectdist \0Modify reselection distance\0" + "\0\0" + "NTP sources:\0\0" + "activity\0Check how many NTP sources are online/offline\0" + "authdata [-a] [-v]\0Display information about authentication\0" + "ntpdata [
]\0Display information about last valid measurement\0" + "add server [options]\0Add new NTP server\0" + "add pool [options]\0Add new pool of NTP servers\0" + "add peer [options]\0Add new NTP peer\0" + "delete
\0Remove server or peer\0" + "burst / [[/]
]\0Start rapid set of measurements\0" + "maxdelay
\0Modify maximum valid sample delay\0" + "maxdelayratio
\0Modify maximum valid delay/minimum ratio\0" + "maxdelaydevratio
\0Modify maximum valid delay/deviation ratio\0" + "minpoll
\0Modify minimum polling interval\0" + "maxpoll
\0Modify maximum polling interval\0" + "minstratum
\0Modify minimum stratum\0" + "offline [[/]
]\0Set sources in subnet to offline status\0" + "online [[/]
]\0Set sources in subnet to online status\0" + "onoffline\0Set all sources to online or offline status\0" + "\0according to network configuration\0" + "polltarget
\0Modify poll target\0" + "refresh\0Refresh IP addresses\0" + "reload sources\0Re-read *.sources files\0" + "sourcename
\0Display original name\0" + "\0\0" + "Manual time input:\0\0" + "manual off|on|reset\0Disable/enable/reset settime command\0" + "manual list\0Show previous settime entries\0" + "manual delete \0Delete previous settime entry\0" + "settime