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|
#! /bin/env perl
# ============================================================================
# $Id: snmpwalk.pl,v 6.0 2009/09/09 15:05:33 dtown Rel $
# Copyright (c) 2000-2009 David M. Town <dtown@cpan.org>
# All rights reserved.
# This program is free software; you may redistribute it and/or modify it
# under the same terms as the Perl 5 programming language system itself.
# ============================================================================
use strict;
use warnings;
use Net::SNMP 6.0 qw( :snmp DEBUG_ALL ENDOFMIBVIEW );
use Getopt::Std;
our $SCRIPT = 'snmpwalk';
our $VERSION = 'v6.0.0';
our %OPTS;
# Validate the command line options.
if (!getopts('a:A:c:CdD:E:m:n:p:r:t:u:v:x:X:', \%OPTS)) {
usage();
}
# Do we have enough/too much information?
if (@ARGV != 2) {
if (@ARGV == 1) {
push @ARGV, '1.3.6.1.2.1'; # mib-2
} else {
usage();
}
}
# Create the SNMP session.
my ($s, $e) = Net::SNMP->session(
-hostname => shift,
exists($OPTS{a}) ? (-authprotocol => $OPTS{a}) : (),
exists($OPTS{A}) ? (-authpassword => $OPTS{A}) : (),
exists($OPTS{c}) ? (-community => $OPTS{c}) : (),
exists($OPTS{D}) ? (-domain => $OPTS{D}) : (),
exists($OPTS{d}) ? (-debug => DEBUG_ALL) : (),
exists($OPTS{m}) ? (-maxmsgsize => $OPTS{m}) : (),
exists($OPTS{p}) ? (-port => $OPTS{p}) : (),
exists($OPTS{r}) ? (-retries => $OPTS{r}) : (),
exists($OPTS{t}) ? (-timeout => $OPTS{t}) : (),
exists($OPTS{u}) ? (-username => $OPTS{u}) : (),
exists($OPTS{v}) ? (-version => $OPTS{v}) : (),
exists($OPTS{x}) ? (-privprotocol => $OPTS{x}) : (),
exists($OPTS{X}) ? (-privpassword => $OPTS{X}) : (),
);
# Was the session created?
if (!defined $s) {
abort($e);
}
# Perform repeated get-next-requests or get-bulk-requests (SNMPv2c/v3)
# until the last returned OBJECT IDENTIFIER is no longer a child of
# the OBJECT IDENTIFIER passed in on the command line.
my @args = (
exists($OPTS{E}) ? (-contextengineid => $OPTS{E}) : (),
exists($OPTS{n}) ? (-contextname => $OPTS{n}) : (),
-varbindlist => [($ARGV[0] eq q{.}) ? '0' : $ARGV[0]],
);
my $last_oid = $ARGV[0];
if ($s->version() == SNMP_VERSION_1) {
while (defined $s->get_next_request(@args)) {
my $oid = ($s->var_bind_names())[0];
lex_check($last_oid, $oid);
if (!oid_base_match($ARGV[0], $oid)) {
last;
}
display($s, ($last_oid = $oid));
@args = (-varbindlist => [$last_oid]);
}
} else {
push @args, -maxrepetitions => 25;
GET_BULK: while (defined $s->get_bulk_request(@args)) {
my @oids = $s->var_bind_names();
if (!scalar @oids) {
abort('Received an empty varBindList');
}
for my $oid (@oids) {
# Make sure we have not hit the end of the MIB.
if ($s->var_bind_types()->{$oid} == ENDOFMIBVIEW) {
display($s, $oid);
last GET_BULK;
}
lex_check($last_oid, $oid);
if (!oid_base_match($ARGV[0], $oid)) {
last GET_BULK;
}
display($s, ($last_oid = $oid));
}
@args = (-maxrepetitions => 25, -varbindlist => [$last_oid]);
}
}
# Let the user know about any errors.
if ($s->error()) {
abort($s->error());
}
# Close the session.
$s->close();
exit 0;
# [functions] ----------------------------------------------------------------
sub display
{
my ($s, $oid) = @_;
printf "%s = %s: %s\n",
$oid,
snmp_type_ntop($s->var_bind_types()->{$oid}),
$s->var_bind_list()->{$oid};
return;
}
sub lex_check
{
my ($current, $next) = @_;
return if exists $OPTS{C};
if (oid_lex_cmp($current, $next) >= 0) {
printf "%s: Lexicographical error detected in response.\n", $SCRIPT;
printf " Current: %s\n", $current;
printf " Next: %s\n", $next;
exit 1;
}
return;
}
sub abort
{
printf "$SCRIPT: " . ((@_ > 1) ? shift(@_) : '%s') . ".\n", @_;
exit 1;
}
sub usage
{
print << "USAGE";
$SCRIPT $VERSION
Copyright (c) 2000-2009 David M. Town. All rights reserved.
Usage: $SCRIPT [options] <hostname> [oid]
Options: -v 1|2c|3 SNMP version
-C Do not check lexicographical ordering
-d Enable debugging
SNMPv1/SNMPv2c:
-c <community> Community name
SNMPv3:
-u <username> Username (required)
-E <engineid> Context Engine ID
-n <name> Context Name
-a <authproto> Authentication protocol <md5|sha>
-A <password> Authentication password
-x <privproto> Privacy protocol <des|3des|aes>
-X <password> Privacy password
Transport Layer:
-D <domain> Domain <udp|udp6|tcp|tcp6>
-m <octets> Maximum message size
-p <port> Destination port
-r <attempts> Number of retries
-t <secs> Timeout period
USAGE
exit 1;
}
# ============================================================================
|
