/[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 1.1 - (show annotations)
Wed Jul 10 08:53:22 2002 UTC (16 years, 9 months ago) by dpavlin
Branch: MAIN
import of original fping.monitor

1 #!/usr/bin/perl
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 $END_TIME;
56
57 exit 0 if (@ARGV == 0);
58
59 open (IN, "$CMD @ARGV 2>&1 |") ||
60 die "could not open pipe to fping: $!\n";
61
62 my @unreachable;
63 my @alive;
64 my @slow;
65 my @other_prob; # details for other per-host problems
66 my @error; # other errors which I'll give non-zero exit for
67 my @icmp; # ICMP messages output by fping
68 my %addr_unknown;
69
70 my %want_host = map { $_ => 1 } @ARGV; # hosts fping hasn't output yet
71
72 while (<IN>)
73 {
74 chomp;
75 if (/^(\S+).*unreachable/)
76 {
77 push (@unreachable, $1);
78 delete $want_host{$1}
79 or push @error, "unreachable host `$1' wasn't asked for";
80 }
81
82 elsif (/^(\S+) is alive \((\S+)/)
83 {
84 delete $want_host{$1}
85 or push @error, "reachable host `$1' wasn't asked for";
86
87 if ($opt{"s"} && $2 > $opt{"s"})
88 {
89 push (@slow, [$1, $2]);
90 }
91
92 else
93 {
94 push (@alive, [$1, $2]);
95 }
96 }
97
98 elsif (/^(\S+)\s+address\s+not\s+found/)
99 {
100 $addr_unknown{$1} = 1;
101 push @other_prob, "$1 address not found";
102 push @unreachable, $1;
103 delete $want_host{$1}
104 or push @error, "unknown host `$1' wasn't asked for";
105 }
106
107 # ICMP Host Unreachable from 1.2.3.4 for ICMP Echo sent to 2.4.6.8
108 # (among others)
109
110 elsif (/^ICMP (.*) for ICMP Echo sent to (\S+)/)
111 {
112 push @icmp, $_;
113 }
114
115 else
116 {
117 push @error, "unidentified output from fping: [$_]";
118 }
119 }
120
121 for my $host (keys %want_host) {
122 push @other_prob, "$host not listed in fping's output";
123 push @unreachable, $host;
124 }
125
126 close (IN);
127
128 $END_TIME = time;
129
130 my $retval = $? >> 8;
131
132 if ($retval < 3)
133 {
134 # do nothing
135 }
136
137 elsif ($retval == 3)
138 {
139 push @error, "fping: invalid cmdline arguments [$CMD @ARGV]";
140 }
141
142 elsif ($retval == 4)
143 {
144 push @error, "fping: system call failure";
145 }
146
147 else
148 {
149 push @error, "unknown return code ($retval) from fping";
150 }
151
152 if (@error) {
153 print "unusual errors\n";
154 }
155 else {
156 my @fail = sort @unreachable, map { $_->[0] } @slow;
157 # This line is intentionally blank if there are no failures.
158 print "@fail\n";
159 }
160
161 print "\n";
162 print "start time: " . localtime ($START_TIME) . "\n";
163 print "end time : " . localtime ($END_TIME) . "\n";
164 print "duration : " . ($END_TIME - $START_TIME) . " seconds\n";
165
166 if (@error != 0)
167 {
168 print <<EOF;
169
170 ------------------------------------------------------------------------------
171 unusual errors
172 ------------------------------------------------------------------------------
173 EOF
174 print join ("\n", @error), "\n";
175 }
176
177 if (@unreachable != 0)
178 {
179 print <<EOF;
180
181 ------------------------------------------------------------------------------
182 unreachable hosts
183 ------------------------------------------------------------------------------
184 EOF
185 print join ("\n", @unreachable), "\n";
186
187 print "\nother problems:\n", join "\n", @other_prob, ''
188 if @other_prob;
189 }
190
191 if (@icmp != 0)
192 {
193 print <<EOF;
194
195 ------------------------------------------------------------------------------
196 ICMP messages
197 ------------------------------------------------------------------------------
198 EOF
199 print join "\n", @icmp, '';
200 }
201
202
203 if (@slow != 0)
204 {
205 print <<EOF;
206
207 ------------------------------------------------------------------------------
208 slow hosts (response time which exceeds $opt{s}ms)
209 ------------------------------------------------------------------------------
210 EOF
211
212 foreach my $host (@slow)
213 {
214 printf ("%-40s %.2f ms\n", @{$host});
215 }
216 }
217
218
219
220 if (@alive != 0)
221 {
222 print <<EOF;
223
224 ------------------------------------------------------------------------------
225 reachable hosts rtt
226 ------------------------------------------------------------------------------
227 EOF
228
229 for (my $i = 0; $i < @alive; $i++)
230 {
231 printf ("%-40s %.2f ms\n", @{$alive[$i]});
232 }
233 }
234
235 #
236 # traceroute
237 #
238 if ($opt{"T"} && @unreachable)
239 {
240 my $header_output = 0;
241 foreach my $host (@unreachable)
242 {
243 next if $addr_unknown{$host};
244 print $header_output++ ? "\n" : <<EOF;
245
246 ------------------------------------------------------------------------------
247 traceroute to unreachable hosts
248 ------------------------------------------------------------------------------
249 EOF
250 system ("traceroute -w 3 $host 2>&1");
251 }
252 }
253
254 exit 1 if @error;
255
256 #
257 # fail only if all hosts do not respond
258 #
259 if ($opt{"a"})
260 {
261 exit(@alive ? 0 : 1);
262 }
263
264 exit 1 if (@slow != 0);
265
266 exit $retval;

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