1 This directory contains support for monitoring the local clock of xntp daemons. 2 3 WARNING: The scripts and routines contained in this directory are beta 4 release! Do not depend on their correct operation. They are, 5 however, in regular use at University of Erlangen-Nuernberg. 6 No severe problems are known for this code. 7 8 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 9 PLEASE THINK TWICE BEFORE STARTING MONITORING REMOTE XNTP DEAMONS !!!! 10 MONITORING MAY INCREASE THE LOAD OF THE DEAMON MONITORED AND MAY 11 INCREASE THE NETWORK LOAD SIGNIFICANTLY 12 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 13 14 15 Files are: 16 17 README: 18 This file 19 20 ntptrap: 21 perl script to log ntp mode 6 trap messages. 22 23 It sends a set_trap request to each server given and dumps the 24 trap messages received. It handles refresh of set_trap. 25 Currently it handles only NTP V2, however the NTP V3 servers 26 also accept v2 requests. It will not interpret v3 system and 27 peer stati correctly. 28 29 usage: 30 ntptrap [-n] [-p <port>] [-l <debug-output>] servers... 31 32 -n: do not send set_trap requests 33 34 port: port to listen for responses 35 useful if you have a configured trap 36 37 debug-output: file to write trace output to (for debugging) 38 39 This script convinced me that ntp trap messages are only of 40 little use. 41 42 ntploopstat: 43 perl script to gather loop info statistics from xntpd via mode 7 44 LOOP_INFO requests. 45 46 This script collects data to allow monitoring of remote xntp servers 47 where it is not possible to directly access the loopstats file 48 produced by xntpd itself. Of course, it can be used to sample 49 a local server if it is not configured to produce a loopstats file. 50 51 Please note, this program poses a high load on the server as 52 a communication takes place every delay seconds ! USE WITH CARE ! 53 54 usage: 55 ntploopstat [-d<delay>] [-t<timeout>] [-l <logfile>] [-v] [ntpserver] 56 57 delay: number of seconds to wait between samples 58 default: 60 seconds 59 timeout: number of seconds to wait for reply 60 default 12 seconds 61 logfile: file to log samples to 62 default: loopstats:<ntpserver>: 63 (note the trailing colon) 64 This name actually is a prefix. 65 The file name is dynamically derived by appending 66 the name of the month the sample belongs to. 67 Thus all samples of a month end up in the same file. 68 69 the format of the files generated is identical to the format used by 70 xntpd with the loopstats file: 71 MJD <seconds since midnight UTC> offset frequency compliance 72 73 if a timeout occurs the next sample is tried after delay/2 seconds 74 75 The script will terminate after MAX_FAIL (currently 60) 76 consecutive errors. 77 78 Errors are counted for: 79 - error on send call 80 - error on select call 81 - error on recv call 82 - short packet received 83 - bad packet 84 - error on open for logfile 85 86 ntploopwatch: 87 perl script to display loop filter statistics collected by ntploopstat 88 or dumped directly by xntpd. 89 90 Gnuplot is used to produce a graphical representation of the sample 91 values, that have been preprocessed and analysed by this script. 92 93 It can either be called to produce a printout of specific data set or 94 used to continously monitor the values. Monitoring is achieved by 95 periodically reprocessing the logfiles, which are updated regularly 96 either by a running ntploopstat process or by the running xntpd. 97 98 usage: 99 to watch statistics permanently: 100 ntploopwatch [-v[<level>]] [-c <config-file>] [-d <working-dir>] 101 102 to get a single print out specify also 103 -P<printer> [-s<samples>] 104 [-S <start-time>] [-E <end-time>] 105 [-O <MaxOffs>] [-o <MinOffs>] 106 107 level: level of verbosity for debugging 108 config-file: file to read configurable settings from 109 On each iteration it is checked and reread 110 if it has been changed 111 default: loopwatch.config 112 working-dir: specify working directory for process, affects 113 interpretation of relative file names 114 115 All other flags are only useful with printing plots, as otherwise 116 command line values would be replaced by settings from the config file. 117 118 printer: specify printer to print plot 119 BSD print systems semantics apply; if printer 120 is omitted the name "ps" is used; plots are 121 prepared using PostScript, thus the printer 122 should best accept postscript input 123 124 For the following see also the comments in loopwatch.config.SAMPLE 125 126 samples: use last # samples from input data 127 start-time: ignore input samples before this date 128 end-time: ignore input samples after this date 129 if both start-time and end-time are specified 130 a given samples value is ignored 131 MaxOffs: 132 MinOffs: restrict value range 133 134 loopwatch.config.SAMPLE: 135 sample config file for ntploopwatch 136 each configurable option is explained there 137 138 lr.pl: 139 linear regression package used by ntploopwatch to compute 140 linear approximations for frequency and offset values 141 within display range 142 143 timelocal.pl: 144 145 used during conversion of ISO_DATE_TIME values specified in 146 loopwatch config files to unix epoch values (seconds since 147 1970-01-01_00:00_00 UTC) 148 149 A version of this file is distributed with perl-4.x, however, 150 it has a bug related to dates crossing 1970, causing endless loops.. 151 The version contained here has been fixed. 152 153 ntp.pl: 154 perl support for ntp v2 mode 6 message handling 155 WARNING: This code is beta level - it triggers a memory leak; 156 as for now it is not quite clear, wether this is caused by a 157 bug in perl or by bad usage of perl within this script. 158 159
Indexes created Sun Aug 30 00:27:18 UTC 2026