/usr/share/cricket/lib/Common/Map.pm is in cricket 1.0.5-15.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | # -*- perl -*-
# Cricket: a configuration, polling and data display wrapper for RRD files
#
# Copyright (C) 1998 Jeff R. Allen and WebTV Networks, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
package Common::Map;
use snmpUtils;
use Common::Log;
use Common::Util;
# This sets up the target right to sneak through the instance
# evaluation code... we do the actual mapping after the target
# gets expanded.
sub mapPrepareInstance {
my($target) = @_;
my($inst) = $target->{'inst'};
return unless defined($inst);
Debug("Preparing $inst");
my($mapkey) = ($inst =~ /^map\((.*)\)$/);
return unless defined($mapkey);
# ok, if we got this far, we have a mapkey, so put it into
# the target dict for later, and fake the inst into an
# eval-able thing so that we can squeak through the instance
# eval code.
$target->{'--mapkey--'} = lc($mapkey);
$target->{'inst'} = "0";
return;
}
sub mapInstance {
my($name, $target) = @_;
# Don't try to map it if we should be touching it:
return if defined($target->{'targets'});
return if defined($target->{'mtargets'});
if ($Common::global::isCollector) {
# we only honor collect=false in the collector, since
# we still need to map it in the grapher so that we
# have the right instance number on hand in the grapher.
return if (defined($target->{'collect'}) &&
isFalse($target->{'collect'}));
}
my($mapkey) = $target->{'--mapkey--'};
# there's no work to do, so leave.
return unless (defined($mapkey));
# if there's no file for some reason, all this fails
# correctly -- i.e. no meta data is returned.
my($rrd, $file);
$file = $target->{'rrd-datafile'};
$rrd = new RRD::File ( -file => $file );
# we only want to check the cache if we are coming
# through here for the first time... see retrieveData
# the the "second coming" of mapInstance.
my($metaRef) = $rrd->getMeta();
if (defined($target->{'--verify-mapkey--'})) {
# Lose the cached last-inst to force the SNMP walk,
# since evidently the cached one didn't work.
delete($metaRef->{'last-inst'});
}
# if cached, try to use it, but warn the retriever it needs to
# verify the inst. if not cached, do a lookup.
my($cachedInst) = $metaRef->{'last-inst'};
if (defined($cachedInst)) {
$target->{'inst'} = $cachedInst;
$target->{'--verify-mapkey--'} = $mapkey;
} else {
my($inst) = mapLookup($name, $target);
if (! defined($inst)) {
# set the inst key to null so that our target ends up
# unresolveable -- i.e. the OID will come out useless
$target->{'inst'} = '';
Warn("Failed to map instance for " .
$target->{'auto-target-name'} .
". Instance is now set to nothing.");
} else {
$target->{'inst'} = $inst;
# save it for next time
$metaRef->{'last-inst'} = $inst;
$rrd->setMeta($metaRef);
}
}
}
# lookup does the hard work. mapkey tells us which map entry
# to use. then we use the ds and match tags in that entry
# to find the instance number
sub mapLookup {
my($name, $target) = @_;
my($mapkey) = $target->{'--mapkey--'};
return unless defined($mapkey);
my($mapRef) = $Common::global::gCT->configHash($name,
'map', $mapkey, $target);
my($match) = $mapRef->{'match'};
if (! defined($match)) {
Warn("No match tag found in map entry $mapkey");
return;
}
$match = ConfigTree::Cache::expandString($match, $target, \&Warn);
# this is expected to hold a string like this: comm@host:port
my($snmp) = $target->{'snmp'};
if (! defined($main::gMapCache{$snmp}->{$mapkey})) {
# cache does not exist, so try to load it
my($baseOID) = $mapRef->{'base-oid'};
my($oidMap) = $Common::global::gCT->configHash($name, 'oid');
my($oid) = Common::Util::mapOid($oidMap, $baseOID);
if (! defined($oid)) {
Warn("Missing base-oid in $mapkey map entry.");
return;
}
my($hp) = $snmp;
$hp =~ s/^.*@//; # remove the community string, if it's there
# (This keeps it out of the logfiles, which seems like
# a good idea.)
Info("Walking $baseOID for $hp to resolve $mapkey mapping");
my(@ret) = snmpUtils::walk($snmp, $oid);
my($row);
foreach $row (@ret) {
my($inst, $name) = split(':', $row, 2);
$main::gMapCache{$snmp}->{$mapkey}->{$name} = $inst;
}
}
# find the inst number -- either by using a regexp match,
# or by a simple table lookup.
# does it look like a regexp? (i.e. "/^foo$/") (we allow
# whitespace, in case they are incompetent with the quote key...
if ($match =~ /^\s*\/(.*)\/\s*$/) {
# this is a regexp
$match = $1;
Debug("Regexp is /$match/i");
# this resets the iterator, so the each will get everything
scalar keys(%{$main::gMapCache{$snmp}->{$mapkey}});
my($name, $inst);
while (($name, $inst) = each(%{$main::gMapCache{$snmp}->{$mapkey}})) {
Debug(" checking: $name");
if ($name =~ /$match/i) {
return $inst;
}
}
# didn't match anything... return nothing.
return;
} else {
Debug("Attempting lookup on $match.");
return $main::gMapCache{$snmp}->{$mapkey}->{$match};
}
}
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