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|
#! /bin/env perl
# ============================================================================
# $Id: snmpset.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( :asn1 snmp_type_ntop DEBUG_ALL );
use Getopt::Std;
our $SCRIPT = 'snmpset';
our $VERSION = 'v6.0.0';
our %OPTS;
# Validate the command line options.
if (!getopts('a:A:c:dD:E:m:n:p:r:t:u:v:x:X:', \%OPTS)) {
usage();
}
# Do we have enough information?
if (@ARGV < 4) {
usage();
}
# Create the SNMP session.
my ($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{P}) ? (-protocol => $OPTS{P}) : (),
exists($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);
}
# Convert the ASN.1 types to the respresentation expected by Net::SNMP.
if (convert_asn1_types(\@ARGV)) {
usage();
}
my @args = (
exists($OPTS{E}) ? (-contextengineid => $OPTS{E}) : (),
exists($OPTS{n}) ? (-contextname => $OPTS{n}) : (),
-varbindlist => \@ARGV,
);
# Send the SNMP message.
if (!defined $s->set_request(@args)) {
abort($s->error());
}
# Print the results.
for ($s->var_bind_names()) {
printf "%s = %s: %s\n",
$_,
snmp_type_ntop($s->var_bind_types()->{$_}),
$s->var_bind_list()->{$_};
}
# Close the session.
$s->close();
exit 0;
# [functions] ----------------------------------------------------------------
sub convert_asn1_types
{
my ($argv) = @_;
# Mapping table: { "user input character" => constant byte value }
my %asn1_types = (
'a' => IPADDRESS,
'c' => COUNTER32,
'C' => COUNTER64,
'g' => GAUGE32,
'h' => OCTET_STRING,
'i' => INTEGER32,
'o' => OBJECT_IDENTIFIER,
'p' => OPAQUE,
's' => OCTET_STRING,
't' => TIMETICKS,
);
# Expect [OBJECT IDENTIFIER, ASN.1 type, object value] combination.
if ((ref($argv) ne 'ARRAY') || (scalar(@{$argv}) % 3)) {
return 1;
}
for (my $i = 0; $i < scalar @{$argv}; $i += 3) {
if (exists $asn1_types{$argv->[$i+1]}) {
if ($argv->[$i+1] eq 'h') {
if ($argv->[$i+2] =~ m/^(?:0x)?([A-F\d]+)$/i) {
# Convert hexadecimal string.
$argv->[$i+2] = pack 'H*', length($1) % 2 ? '0'.$1 : $1;
} else {
abort(sprintf q{The string "%s" is is expected in } .
q{hexadecimal format for type 'h'},
$argv->[$i+2]);
}
}
$argv->[$i+1] = $asn1_types{$argv->[$i+1]};
} else {
abort(sprintf 'The ASN.1 type "%s" is unknown', $argv->[$i+1]);
}
}
return 0;
}
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> <type> <value> [...]
Options: -v 1|2c|3 SNMP version
-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
Valid type values:
a - IpAddress i - INTEGER
c - Counter o - OBJECT IDENTIFIER
C - Counter64 p - Opaque
g - Gauge/Unsigned32 s - OCTET STRING
h - OCTET STRING (hex) t - TimeTicks
USAGE
exit 1;
}
# ============================================================================
|
