/[mon-modules]/fping+args.monitor
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /fping+args.monitor

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Revision 1.3 - (show annotations)
Wed Jul 10 10:04:48 2002 UTC (16 years, 11 months ago) by dpavlin
Branch: MAIN
Changes since 1.2: +4 -3 lines
add each host to test list just once

1 #!/usr/bin/perl -w
2 #
3 # Return a list of hosts which not reachable via ICMP echo
4 #
5 # Jim Trocki, trockij@transmeta.com
6 #
7 # $Id: fping.monitor 1.7 Mon, 27 Aug 2001 14:22:45 -0400 trockij $
8 #
9 # Copyright (C) 1998, Jim Trocki
10 #
11 # This program is free software; you can redistribute it and/or modify
12 # it under the terms of the GNU General Public License as published by
13 # the Free Software Foundation; either version 2 of the License, or
14 # (at your option) any later version.
15 #
16 # This program is distributed in the hope that it will be useful,
17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 # GNU General Public License for more details.
20 #
21 # You should have received a copy of the GNU General Public License
22 # along with this program; if not, write to the Free Software
23 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #
25 use strict;
26
27 use Getopt::Std;
28
29 my %opt;
30 getopts ("ahr:s:t:T", \%opt);
31
32 sub usage
33 {
34 print <<EOF;
35 usage: fping.monitor [-a] [-r num] [-s num] [-t num] [-T] host [host...]
36
37 -a only report failure if all hosts are unreachable
38 -r num retry "num" times for each host before reporting failure
39 -s num consider hosts which respond in over "num" msecs failures
40 -t num wait "num" msecs before sending retries
41 -T traceroute to each failed host. CAUTION: this may cause
42 this monitor to hang for a very long time
43
44 EOF
45
46 exit;
47 }
48
49 usage if ($opt{"h"});
50
51 my $TIMEOUT = $opt{"t"} || 2000;
52 my $RETRIES = $opt{"r"} || 3;
53 my $CMD = "fping -e -r $RETRIES -t $TIMEOUT";
54 my $START_TIME = time;
55 my $END_TIME;
56
57 exit 0 if (@ARGV == 0);
58
59 my @hosts;
60
61 # you can use hosts in format host:optional configuration parameters and
62 # this part will strip everything after hostname
63 foreach (@ARGV) {
64 if (m/^[^:]+:?[^\@]*\@([^\/]+)\/?.*/) {
65 my $host = $1;
66 push @hosts,$host if (! grep /^$host$/,@hosts);
67 } else {
68 push @hosts,$_ if (! grep /^$_$/,@hosts);
69 }
70 }
71
72 open (IN, "$CMD @hosts 2>&1 |") ||
73 die "could not open pipe to fping: $!\n";
74
75 my @unreachable;
76 my @alive;
77 my @slow;
78 my @other_prob; # details for other per-host problems
79 my @error; # other errors which I'll give non-zero exit for
80 my @icmp; # ICMP messages output by fping
81 my %addr_unknown;
82
83 my %want_host = map { $_ => 1 } @hosts; # hosts fping hasn't output yet
84
85 while (<IN>)
86 {
87 chomp;
88 if (/^(\S+).*unreachable/)
89 {
90 push (@unreachable, $1);
91 delete $want_host{$1}
92 or push @error, "unreachable host `$1' wasn't asked for";
93 }
94
95 elsif (/^(\S+) is alive \((\S+)/)
96 {
97 delete $want_host{$1}
98 or push @error, "reachable host `$1' wasn't asked for";
99
100 if ($opt{"s"} && $2 > $opt{"s"})
101 {
102 push (@slow, [$1, $2]);
103 }
104
105 else
106 {
107 push (@alive, [$1, $2]);
108 }
109 }
110
111 elsif (/^(\S+)\s+address\s+not\s+found/)
112 {
113 $addr_unknown{$1} = 1;
114 push @other_prob, "$1 address not found";
115 push @unreachable, $1;
116 delete $want_host{$1}
117 or push @error, "unknown host `$1' wasn't asked for";
118 }
119
120 # ICMP Host Unreachable from 1.2.3.4 for ICMP Echo sent to 2.4.6.8
121 # (among others)
122
123 elsif (/^ICMP (.*) for ICMP Echo sent to (\S+)/)
124 {
125 push @icmp, $_;
126 }
127
128 else
129 {
130 push @error, "unidentified output from fping: [$_]";
131 }
132 }
133
134 for my $host (keys %want_host) {
135 push @other_prob, "$host not listed in fping's output";
136 push @unreachable, $host;
137 }
138
139 close (IN);
140
141 $END_TIME = time;
142
143 my $retval = $? >> 8;
144
145 if ($retval < 3)
146 {
147 # do nothing
148 }
149
150 elsif ($retval == 3)
151 {
152 push @error, "fping: invalid cmdline arguments [$CMD @ARGV]";
153 }
154
155 elsif ($retval == 4)
156 {
157 push @error, "fping: system call failure";
158 }
159
160 else
161 {
162 push @error, "unknown return code ($retval) from fping";
163 }
164
165 if (@error) {
166 print "unusual errors\n";
167 }
168 else {
169 my @fail = sort @unreachable, map { $_->[0] } @slow;
170 # This line is intentionally blank if there are no failures.
171 print "@fail\n";
172 }
173
174 print "\n";
175 print "start time: " . localtime ($START_TIME) . "\n";
176 print "end time : " . localtime ($END_TIME) . "\n";
177 print "duration : " . ($END_TIME - $START_TIME) . " seconds\n";
178
179 if (@error != 0)
180 {
181 print <<EOF;
182
183 ------------------------------------------------------------------------------
184 unusual errors
185 ------------------------------------------------------------------------------
186 EOF
187 print join ("\n", @error), "\n";
188 }
189
190 if (@unreachable != 0)
191 {
192 print <<EOF;
193
194 ------------------------------------------------------------------------------
195 unreachable hosts
196 ------------------------------------------------------------------------------
197 EOF
198 print join ("\n", @unreachable), "\n";
199
200 print "\nother problems:\n", join "\n", @other_prob, ''
201 if @other_prob;
202 }
203
204 if (@icmp != 0)
205 {
206 print <<EOF;
207
208 ------------------------------------------------------------------------------
209 ICMP messages
210 ------------------------------------------------------------------------------
211 EOF
212 print join "\n", @icmp, '';
213 }
214
215
216 if (@slow != 0)
217 {
218 print <<EOF;
219
220 ------------------------------------------------------------------------------
221 slow hosts (response time which exceeds $opt{s}ms)
222 ------------------------------------------------------------------------------
223 EOF
224
225 foreach my $host (@slow)
226 {
227 printf ("%-40s %.2f ms\n", @{$host});
228 }
229 }
230
231
232
233 if (@alive != 0)
234 {
235 print <<EOF;
236
237 ------------------------------------------------------------------------------
238 reachable hosts rtt
239 ------------------------------------------------------------------------------
240 EOF
241
242 for (my $i = 0; $i < @alive; $i++)
243 {
244 printf ("%-40s %.2f ms\n", @{$alive[$i]});
245 }
246 }
247
248 #
249 # traceroute
250 #
251 if ($opt{"T"} && @unreachable)
252 {
253 my $header_output = 0;
254 foreach my $host (@unreachable)
255 {
256 next if $addr_unknown{$host};
257 print $header_output++ ? "\n" : <<EOF;
258
259 ------------------------------------------------------------------------------
260 traceroute to unreachable hosts
261 ------------------------------------------------------------------------------
262 EOF
263 system ("traceroute -w 3 $host 2>&1");
264 }
265 }
266
267 exit 1 if @error;
268
269 #
270 # fail only if all hosts do not respond
271 #
272 if ($opt{"a"})
273 {
274 exit(@alive ? 0 : 1);
275 }
276
277 exit 1 if (@slow != 0);
278
279 exit $retval;

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