This directory contains support for monitoring the local clock of xntp daemons. WARNING: The scripts and routines contained in this directory are beta release! Do not depend on their correct operation. They are, however, in regular use at University of Erlangen-Nuernberg. No severe problems are known for this code. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! PLEASE THINK TWICE BEFORE STARTING MONITORING REMOTE XNTP DEAMONS !!!! MONITORING MAY INCREASE THE LOAD OF THE DEAMON MONITORED AND MAY INCREASE THE NETWORK LOAD SIGNIFICANTLY !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Files are: README: This file ntptrap: perl script to log ntp mode 6 trap messages. It sends a set_trap request to each server given and dumps the trap messages received. It handles refresh of set_trap. Currently it handles only NTP V2, however the NTP V3 servers also accept v2 requests. It will not interpret v3 system and peer stati correctly. usage: ntptrap [-n] [-p ] [-l ] servers... -n: do not send set_trap requests port: port to listen for responses useful if you have a configured trap debug-output: file to write trace output to (for debugging) This script convinced me that ntp trap messages are only of little use. ntploopstat: perl script to gather loop info statistics from xntpd via mode 7 LOOP_INFO requests. This script collects data to allow monitoring of remote xntp servers where it is not possible to directly access the loopstats file produced by xntpd itself. Of course, it can be used to sample a local server if it is not configured to produce a loopstats file. Please note, this program poses a high load on the server as a communication takes place every delay seconds ! USE WITH CARE ! usage: ntploopstat [-d] [-t] [-l ] [-v] [ntpserver] delay: number of seconds to wait between samples default: 60 seconds timeout: number of seconds to wait for reply default 12 seconds logfile: file to log samples to default: loopstats:: (note the trailing colon) This name actually is a prefix. The file name is dynamically derived by appending the name of the month the sample belongs to. Thus all samples of a month end up in the same file. the format of the files generated is identical to the format used by xntpd with the loopstats file: MJD offset frequency compliance if a timeout occurs the next sample is tried after delay/2 seconds The script will terminate after MAX_FAIL (currently 60) consecutive errors. Errors are counted for: - error on send call - error on select call - error on recv call - short packet received - bad packet - error on open for logfile ntploopwatch: perl script to display loop filter statistics collected by ntploopstat or dumped directly by xntpd. Gnuplot is used to produce a graphical representation of the sample values, that have been preprocessed and analysed by this script. It can either be called to produce a printout of specific data set or used to continously monitor the values. Monitoring is achieved by periodically reprocessing the logfiles, which are updated regularly either by a running ntploopstat process or by the running xntpd. usage: to watch statistics permanently: ntploopwatch [-v[]] [-c ] [-d ] to get a single print out specify also -P [-s] [-S ] [-E ] [-O ] [-o ] level: level of verbosity for debugging config-file: file to read configurable settings from On each iteration it is checked and reread if it has been changed default: loopwatch.config working-dir: specify working directory for process, affects interpretation of relative file names All other flags are only useful with printing plots, as otherwise command line values would be replaced by settings from the config file. printer: specify printer to print plot BSD print systems semantics apply; if printer is omitted the name "ps" is used; plots are prepared using PostScript, thus the printer should best accept postscript input For the following see also the comments in loopwatch.config.SAMPLE samples: use last # samples from input data start-time: ignore input samples before this date end-time: ignore input samples after this date if both start-time and end-time are specified a given samples value is ignored MaxOffs: MinOffs: restrict value range loopwatch.config.SAMPLE: sample config file for ntploopwatch each configurable option is explained there lr.pl: linear regression package used by ntploopwatch to compute linear approximations for frequency and offset values within display range timelocal.pl: used during conversion of ISO_DATE_TIME values specified in loopwatch config files to unix epoch values (seconds since 1970-01-01_00:00_00 UTC) A version of this file is distributed with perl-4.x, however, it has a bug related to dates crossing 1970, causing endless loops.. The version contained here has been fixed. ntp.pl: perl support for ntp v2 mode 6 message handling WARNING: This code is beta level - it triggers a memory leak; as for now it is not quite clear, wether this is caused by a bug in perl or by bad usage of perl within this script.