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#!/usr/bin/perl |
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# |
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# Return a list of hosts which not reachable via ICMP echo |
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# |
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# Jim Trocki, trockij@transmeta.com |
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# |
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# $Id: fping.monitor 1.7 Mon, 27 Aug 2001 14:22:45 -0400 trockij $ |
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# |
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# Copyright (C) 1998, Jim Trocki |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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use strict; |
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|
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use Getopt::Std; |
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|
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my %opt; |
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getopts ("ahr:s:t:T", \%opt); |
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|
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sub usage |
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{ |
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print <<EOF; |
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usage: fping.monitor [-a] [-r num] [-s num] [-t num] [-T] host [host...] |
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|
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-a only report failure if all hosts are unreachable |
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-r num retry "num" times for each host before reporting failure |
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-s num consider hosts which respond in over "num" msecs failures |
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-t num wait "num" msecs before sending retries |
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-T traceroute to each failed host. CAUTION: this may cause |
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this monitor to hang for a very long time |
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|
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EOF |
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|
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exit; |
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} |
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|
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usage if ($opt{"h"}); |
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|
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my $TIMEOUT = $opt{"t"} || 2000; |
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my $RETRIES = $opt{"r"} || 3; |
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my $CMD = "fping -e -r $RETRIES -t $TIMEOUT"; |
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my $START_TIME = time; |
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my $END_TIME; |
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|
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exit 0 if (@ARGV == 0); |
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|
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open (IN, "$CMD @ARGV 2>&1 |") || |
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die "could not open pipe to fping: $!\n"; |
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|
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my @unreachable; |
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my @alive; |
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my @slow; |
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my @other_prob; # details for other per-host problems |
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my @error; # other errors which I'll give non-zero exit for |
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my @icmp; # ICMP messages output by fping |
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my %addr_unknown; |
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|
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my %want_host = map { $_ => 1 } @ARGV; # hosts fping hasn't output yet |
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|
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while (<IN>) |
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{ |
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chomp; |
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if (/^(\S+).*unreachable/) |
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{ |
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push (@unreachable, $1); |
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delete $want_host{$1} |
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or push @error, "unreachable host `$1' wasn't asked for"; |
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} |
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|
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elsif (/^(\S+) is alive \((\S+)/) |
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{ |
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delete $want_host{$1} |
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or push @error, "reachable host `$1' wasn't asked for"; |
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|
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if ($opt{"s"} && $2 > $opt{"s"}) |
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{ |
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push (@slow, [$1, $2]); |
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} |
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|
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else |
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{ |
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push (@alive, [$1, $2]); |
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} |
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} |
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|
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elsif (/^(\S+)\s+address\s+not\s+found/) |
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{ |
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$addr_unknown{$1} = 1; |
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push @other_prob, "$1 address not found"; |
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push @unreachable, $1; |
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delete $want_host{$1} |
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or push @error, "unknown host `$1' wasn't asked for"; |
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} |
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|
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# ICMP Host Unreachable from 1.2.3.4 for ICMP Echo sent to 2.4.6.8 |
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# (among others) |
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|
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elsif (/^ICMP (.*) for ICMP Echo sent to (\S+)/) |
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{ |
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push @icmp, $_; |
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} |
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|
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else |
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{ |
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push @error, "unidentified output from fping: [$_]"; |
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} |
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} |
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|
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for my $host (keys %want_host) { |
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push @other_prob, "$host not listed in fping's output"; |
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push @unreachable, $host; |
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} |
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|
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close (IN); |
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|
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$END_TIME = time; |
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|
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my $retval = $? >> 8; |
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|
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if ($retval < 3) |
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{ |
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# do nothing |
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} |
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|
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elsif ($retval == 3) |
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{ |
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push @error, "fping: invalid cmdline arguments [$CMD @ARGV]"; |
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} |
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|
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elsif ($retval == 4) |
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{ |
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push @error, "fping: system call failure"; |
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} |
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|
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else |
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{ |
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push @error, "unknown return code ($retval) from fping"; |
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} |
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|
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if (@error) { |
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print "unusual errors\n"; |
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} |
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else { |
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my @fail = sort @unreachable, map { $_->[0] } @slow; |
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# This line is intentionally blank if there are no failures. |
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print "@fail\n"; |
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} |
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|
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print "\n"; |
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print "start time: " . localtime ($START_TIME) . "\n"; |
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print "end time : " . localtime ($END_TIME) . "\n"; |
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print "duration : " . ($END_TIME - $START_TIME) . " seconds\n"; |
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|
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if (@error != 0) |
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{ |
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print <<EOF; |
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|
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------------------------------------------------------------------------------ |
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unusual errors |
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------------------------------------------------------------------------------ |
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EOF |
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print join ("\n", @error), "\n"; |
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} |
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|
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if (@unreachable != 0) |
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{ |
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print <<EOF; |
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|
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------------------------------------------------------------------------------ |
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unreachable hosts |
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------------------------------------------------------------------------------ |
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EOF |
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print join ("\n", @unreachable), "\n"; |
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|
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print "\nother problems:\n", join "\n", @other_prob, '' |
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if @other_prob; |
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} |
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|
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if (@icmp != 0) |
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{ |
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print <<EOF; |
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|
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------------------------------------------------------------------------------ |
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ICMP messages |
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------------------------------------------------------------------------------ |
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EOF |
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print join "\n", @icmp, ''; |
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} |
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|
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|
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if (@slow != 0) |
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{ |
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print <<EOF; |
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|
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------------------------------------------------------------------------------ |
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slow hosts (response time which exceeds $opt{s}ms) |
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------------------------------------------------------------------------------ |
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EOF |
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|
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foreach my $host (@slow) |
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{ |
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printf ("%-40s %.2f ms\n", @{$host}); |
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} |
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} |
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|
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|
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|
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if (@alive != 0) |
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{ |
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print <<EOF; |
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|
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------------------------------------------------------------------------------ |
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reachable hosts rtt |
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------------------------------------------------------------------------------ |
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EOF |
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|
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for (my $i = 0; $i < @alive; $i++) |
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{ |
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printf ("%-40s %.2f ms\n", @{$alive[$i]}); |
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} |
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} |
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|
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# |
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# traceroute |
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# |
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if ($opt{"T"} && @unreachable) |
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{ |
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my $header_output = 0; |
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foreach my $host (@unreachable) |
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{ |
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next if $addr_unknown{$host}; |
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print $header_output++ ? "\n" : <<EOF; |
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|
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------------------------------------------------------------------------------ |
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traceroute to unreachable hosts |
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------------------------------------------------------------------------------ |
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EOF |
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system ("traceroute -w 3 $host 2>&1"); |
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} |
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} |
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|
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exit 1 if @error; |
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|
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# |
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# fail only if all hosts do not respond |
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# |
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if ($opt{"a"}) |
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{ |
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exit(@alive ? 0 : 1); |
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} |
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|
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exit 1 if (@slow != 0); |
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|
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exit $retval; |
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