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# -*- mode: perl -*-
# ============================================================================
package Net::SNMP::PDU;
# $Id: PDU.pm,v 3.1 2010/09/10 00:01:22 dtown Rel $
# Object used to represent a SNMP PDU.
# Copyright (c) 2001-2010 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 Net::SNMP::Message qw(
:types :versions asn1_itoa ENTERPRISE_SPECIFIC TRUE FALSE DEBUG_INFO
);
use Net::SNMP::Transport qw( DOMAIN_UDPIPV4 DOMAIN_TCPIPV4 );
## Version of the Net::SNMP::PDU module
our $VERSION = v3.0.1;
## Handle importing/exporting of symbols
use base qw( Net::SNMP::Message );
sub import
{
return Net::SNMP::Message->export_to_level(1, @_);
}
# [public methods] -----------------------------------------------------------
sub new
{
my $class = shift;
# We play some games here to allow us to "convert" a Message into a PDU.
my $this = ref($_[0]) ? bless shift(@_), $class : $class->SUPER::new();
# Override or initialize fields inherited from the base class
$this->{_error_status} = 0;
$this->{_error_index} = 0;
$this->{_scoped} = FALSE;
$this->{_var_bind_list} = undef;
$this->{_var_bind_names} = [];
$this->{_var_bind_types} = undef;
my (%argv) = @_;
# Validate the passed arguments
for (keys %argv) {
if (/^-?callback$/i) {
$this->callback($argv{$_});
} elsif (/^-?contextengineid/i) {
$this->context_engine_id($argv{$_});
} elsif (/^-?contextname/i) {
$this->context_name($argv{$_});
} elsif (/^-?debug$/i) {
$this->debug($argv{$_});
} elsif (/^-?leadingdot$/i) {
$this->leading_dot($argv{$_});
} elsif (/^-?maxmsgsize$/i) {
$this->max_msg_size($argv{$_});
} elsif (/^-?requestid$/i) {
$this->request_id($argv{$_});
} elsif (/^-?security$/i) {
$this->security($argv{$_});
} elsif (/^-?translate$/i) {
$this->{_translate} = $argv{$_};
} elsif (/^-?transport$/i) {
$this->transport($argv{$_});
} elsif (/^-?version$/i) {
$this->version($argv{$_});
} else {
$this->_error('The argument "%s" is unknown', $_);
}
if (defined $this->{_error}) {
return wantarray ? (undef, $this->{_error}) : undef;
}
}
if (!defined $this->{_transport}) {
$this->_error('The Transport Domain object is not defined');
return wantarray ? (undef, $this->{_error}) : undef;
}
return wantarray ? ($this, q{}) : $this;
}
sub prepare_get_request
{
my ($this, $oids) = @_;
$this->_error_clear();
return $this->prepare_pdu(GET_REQUEST,
$this->_create_oid_null_pairs($oids));
}
sub prepare_get_next_request
{
my ($this, $oids) = @_;
$this->_error_clear();
return $this->prepare_pdu(GET_NEXT_REQUEST,
$this->_create_oid_null_pairs($oids));
}
sub prepare_get_response
{
my ($this, $trios) = @_;
$this->_error_clear();
return $this->prepare_pdu(GET_RESPONSE,
$this->_create_oid_value_pairs($trios));
}
sub prepare_set_request
{
my ($this, $trios) = @_;
$this->_error_clear();
return $this->prepare_pdu(SET_REQUEST,
$this->_create_oid_value_pairs($trios));
}
sub prepare_trap
{
my ($this, $enterprise, $addr, $generic, $specific, $time, $trios) = @_;
$this->_error_clear();
return $this->_error('Insufficient arguments for a Trap-PDU') if (@_ < 6);
# enterprise
if (!defined $enterprise) {
# Use iso(1).org(3).dod(6).internet(1).private(4).enterprises(1)
# for the default enterprise.
$this->{_enterprise} = '1.3.6.1.4.1';
} elsif ($enterprise !~ m/^\.?\d+(?:\.\d+)* *$/) {
return $this->_error(
'The enterprise OBJECT IDENTIFIER "%s" is expected in dotted ' .
'decimal notation', $enterprise
);
} else {
$this->{_enterprise} = $enterprise;
}
# agent-addr
if (!defined $addr) {
# See if we can get the agent-addr from the Transport
# Layer. If not, we return an error.
if (defined $this->{_transport}) {
if (($this->{_transport}->domain() ne DOMAIN_UDPIPV4) &&
($this->{_transport}->domain() ne DOMAIN_TCPIPV4))
{
$this->{_agent_addr} = '0.0.0.0';
} else {
$this->{_agent_addr} = $this->{_transport}->agent_addr();
if ($this->{_agent_addr} eq '0.0.0.0') {
delete $this->{_agent_addr};
}
}
}
if (!exists $this->{_agent_addr}) {
return $this->_error('Unable to resolve the local agent-addr');
}
} elsif ($addr !~ /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/) {
return $this->_error(
'The agent-addr "%s" is expected in dotted decimal notation', $addr
);
} else {
$this->{_agent_addr} = $addr;
}
# generic-trap
if (!defined $generic) {
# Use enterpriseSpecific(6) for the generic-trap type.
$this->{_generic_trap} = ENTERPRISE_SPECIFIC;
} elsif ($generic !~ /^\d+$/) {
return $this->_error(
'The generic-trap value "%s" is expected in positive numeric format',
$generic
);
} else {
$this->{_generic_trap} = $generic;
}
# specific-trap
if (!defined $specific) {
$this->{_specific_trap} = 0;
} elsif ($specific !~ /^\d+$/) {
return $this->_error(
'The specific-trap value "%s" is expected in positive numeric format',
$specific
);
} else {
$this->{_specific_trap} = $specific;
}
# time-stamp
if (!defined $time) {
# Use the "uptime" of the script for the time-stamp.
$this->{_time_stamp} = ((time() - $^T) * 100);
} elsif ($time !~ /^\d+$/) {
return $this->_error(
'The time-stamp value "%s" is expected in positive numeric format',
$time
);
} else {
$this->{_time_stamp} = $time;
}
return $this->prepare_pdu(TRAP, $this->_create_oid_value_pairs($trios));
}
sub prepare_get_bulk_request
{
my ($this, $repeaters, $repetitions, $oids) = @_;
$this->_error_clear();
if (@_ < 3) {
return $this->_error('Insufficient arguments for a GetBulkRequest-PDU');
}
# non-repeaters
if (!defined $repeaters) {
$this->{_error_status} = 0;
} elsif ($repeaters !~ /^\d+$/) {
return $this->_error(
'The non-repeaters value "%s" is expected in positive numeric format',
$repeaters
);
} elsif ($repeaters > 2147483647) {
return $this->_error(
'The non-repeaters value %s is out of range (0..2147483647)',
$repeaters
);
} else {
$this->{_error_status} = $repeaters;
}
# max-repetitions
if (!defined $repetitions) {
$this->{_error_index} = 0;
} elsif ($repetitions !~ /^\d+$/) {
return $this->_error(
'The max-repetitions value "%s" is expected in positive numeric ' .
'format', $repetitions
);
} elsif ($repetitions > 2147483647) {
return $this->_error(
'The max-repetitions value %s is out of range (0..2147483647)',
$repetitions
);
} else {
$this->{_error_index} = $repetitions;
}
# Some sanity checks
if (defined($oids) && (ref($oids) eq 'ARRAY')) {
if ($this->{_error_status} > @{$oids}) {
return $this->_error(
'The non-repeaters value %d is greater than the number of ' .
'variable-bindings %d', $this->{_error_status}, scalar @{$oids}
);
}
if (($this->{_error_status} == @{$oids}) && ($this->{_error_index})) {
return $this->_error(
'The non-repeaters value %d equals the number of variable-' .
'bindings and max-repetitions is not equal to zero',
$this->{_error_status}
);
}
}
return $this->prepare_pdu(GET_BULK_REQUEST,
$this->_create_oid_null_pairs($oids));
}
sub prepare_inform_request
{
my ($this, $trios) = @_;
$this->_error_clear();
return $this->prepare_pdu(INFORM_REQUEST,
$this->_create_oid_value_pairs($trios));
}
sub prepare_snmpv2_trap
{
my ($this, $trios) = @_;
$this->_error_clear();
return $this->prepare_pdu(SNMPV2_TRAP,
$this->_create_oid_value_pairs($trios));
}
sub prepare_report
{
my ($this, $trios) = @_;
$this->_error_clear();
return $this->prepare_pdu(REPORT, $this->_create_oid_value_pairs($trios));
}
sub prepare_pdu
{
my ($this, $type, $var_bind) = @_;
# Clear the buffer
$this->clear();
# Clear the "scoped" indication
$this->{_scoped} = FALSE;
# VarBindList::=SEQUENCE OF VarBind
if (!defined $this->_prepare_var_bind_list($var_bind || [])) {
return $this->_error();
}
# PDU::=SEQUENCE
if (!defined $this->_prepare_pdu_sequence($type)) {
return $this->_error();
}
return TRUE;
}
sub prepare_var_bind_list
{
my ($this, $var_bind) = @_;
return $this->_prepare_var_bind_list($var_bind || []);
}
sub prepare_pdu_sequence
{
goto &_prepare_pdu_sequence;
}
sub prepare_pdu_scope
{
goto &_prepare_pdu_scope;
}
sub process_pdu
{
my ($this) = @_;
# Clear any errors
$this->_error_clear();
# PDU::=SEQUENCE
return $this->_error() if !defined $this->_process_pdu_sequence();
# VarBindList::=SEQUENCE OF VarBind
return $this->_process_var_bind_list();
}
sub process_pdu_scope
{
goto &_process_pdu_scope;
}
sub process_pdu_sequence
{
goto &_process_pdu_sequence;
}
sub process_var_bind_list
{
goto &_process_var_bind_list;
}
sub expect_response
{
my ($this) = @_;
if (($this->{_pdu_type} == GET_RESPONSE) ||
($this->{_pdu_type} == TRAP) ||
($this->{_pdu_type} == SNMPV2_TRAP) ||
($this->{_pdu_type} == REPORT))
{
return FALSE;
}
return TRUE;
}
sub pdu_type
{
return $_[0]->{_pdu_type};
}
sub error_status
{
my ($this, $status) = @_;
# error-status::=INTEGER { noError(0) .. inconsistentName(18) }
if (@_ == 2) {
if (!defined $status) {
return $this->_error('The error-status value is not defined');
}
if (($status < 0) ||
($status > (($this->version > SNMP_VERSION_1) ? 18 : 5)))
{
return $this->_error(
'The error-status %s is out of range (0..%d)',
$status, ($this->version > SNMP_VERSION_1) ? 18 : 5
);
}
$this->{_error_status} = $status;
}
return $this->{_error_status} || 0; # noError(0)
}
sub error_index
{
my ($this, $index) = @_;
# error-index::=INTEGER (0..max-bindings)
if (@_ == 2) {
if (!defined $index) {
return $this->_error('The error-index value is not defined');
}
if (($index < 0) || ($index > 2147483647)) {
return $this->_error(
'The error-index value %s is out of range (0.. 2147483647)',
$index
);
}
$this->{_error_index} = $index;
}
return $this->{_error_index} || 0;
}
sub non_repeaters
{
# non-repeaters::=INTEGER (0..max-bindings)
return $_[0]->{_error_status} || 0;
}
sub max_repetitions
{
# max-repetitions::=INTEGER (0..max-bindings)
return $_[0]->{_error_index} || 0;
}
sub enterprise
{
return $_[0]->{_enterprise};
}
sub agent_addr
{
return $_[0]->{_agent_addr};
}
sub generic_trap
{
return $_[0]->{_generic_trap};
}
sub specific_trap
{
return $_[0]->{_specific_trap};
}
sub time_stamp
{
return $_[0]->{_time_stamp};
}
sub var_bind_list
{
my ($this, $vbl, $types) = @_;
return if defined $this->{_error};
if (@_ > 1) {
# The VarBindList HASH is being updated from an external
# source. We need to update the VarBind names ARRAY to
# correspond to the new keys of the HASH. If the updated
# information is valid, we will use lexicographical ordering
# for the ARRAY entries since we do not have a PDU to use
# to determine the ordering. The ASN.1 types HASH is also
# updated here if a cooresponding HASH is passed. We double
# check the mapping by populating the hash with the keys of
# the VarBindList HASH.
if (!defined($vbl) || (ref($vbl) ne 'HASH')) {
$this->{_var_bind_list} = undef;
$this->{_var_bind_names} = [];
$this->{_var_bind_types} = undef;
} else {
$this->{_var_bind_list} = $vbl;
@{$this->{_var_bind_names}} =
map { $_->[0] }
sort { $a->[1] cmp $b->[1] }
map
{
my $oid = $_;
$oid =~ s/^\.//;
$oid =~ s/ /\.0/g;
[$_, pack 'N*', split m/\./, $oid]
} keys %{$vbl};
if (!defined($types) || (ref($types) ne 'HASH')) {
$types = {};
}
for (keys %{$vbl}) {
$this->{_var_bind_types}->{$_} =
exists($types->{$_}) ? $types->{$_} : undef;
}
}
}
return $this->{_var_bind_list};
}
sub var_bind_names
{
my ($this) = @_;
return [] if defined($this->{_error}) || !defined $this->{_var_bind_names};
return $this->{_var_bind_names};
}
sub var_bind_types
{
my ($this) = @_;
return if defined $this->{_error};
return $this->{_var_bind_types};
}
sub scoped
{
return $_[0]->{_scoped};
}
# [private methods] ----------------------------------------------------------
sub _prepare_pdu_scope
{
my ($this) = @_;
return TRUE if (($this->{_version} < SNMP_VERSION_3) || ($this->{_scoped}));
# contextName::=OCTET STRING
if (!defined $this->prepare(OCTET_STRING, $this->context_name())) {
return $this->_error();
}
# contextEngineID::=OCTET STRING
if (!defined $this->prepare(OCTET_STRING, $this->context_engine_id())) {
return $this->_error();
}
# ScopedPDU::=SEQUENCE
if (!defined $this->prepare(SEQUENCE)) {
return $this->_error();
}
# Indicate that this PDU has been scoped and return success.
return $this->{_scoped} = TRUE;
}
sub _prepare_pdu_sequence
{
my ($this, $type) = @_;
# Do not do anything if there has already been an error
return $this->_error() if defined $this->{_error};
# Make sure the PDU type was passed
return $this->_error('The SNMP PDU type is not defined') if (@_ != 2);
# Set the PDU type
$this->{_pdu_type} = $type;
# Make sure the request-id has been set
if (!exists $this->{_request_id}) {
$this->{_request_id} = int rand 2147483648;
}
# We need to encode everything in reverse order so the
# objects end up in the correct place.
if ($this->{_pdu_type} != TRAP) { # PDU::=SEQUENCE
# error-index/max-repetitions::=INTEGER
if (!defined $this->prepare(INTEGER, $this->{_error_index})) {
return $this->_error();
}
# error-status/non-repeaters::=INTEGER
if (!defined $this->prepare(INTEGER, $this->{_error_status})) {
return $this->_error();
}
# request-id::=INTEGER
if (!defined $this->prepare(INTEGER, $this->{_request_id})) {
return $this->_error();
}
} else { # Trap-PDU::=IMPLICIT SEQUENCE
# time-stamp::=TimeTicks
if (!defined $this->prepare(TIMETICKS, $this->{_time_stamp})) {
return $this->_error();
}
# specific-trap::=INTEGER
if (!defined $this->prepare(INTEGER, $this->{_specific_trap})) {
return $this->_error();
}
# generic-trap::=INTEGER
if (!defined $this->prepare(INTEGER, $this->{_generic_trap})) {
return $this->_error();
}
# agent-addr::=NetworkAddress
if (!defined $this->prepare(IPADDRESS, $this->{_agent_addr})) {
return $this->_error();
}
# enterprise::=OBJECT IDENTIFIER
if (!defined $this->prepare(OBJECT_IDENTIFIER, $this->{_enterprise})) {
return $this->_error();
}
}
# PDUs::=CHOICE
if (!defined $this->prepare($this->{_pdu_type})) {
return $this->_error();
}
return TRUE;
}
sub _prepare_var_bind_list
{
my ($this, $var_bind) = @_;
# The passed array is expected to consist of groups of four values
# consisting of two sets of ASN.1 types and their values.
if (@{$var_bind} % 4) {
$this->var_bind_list(undef);
return $this->_error(
'The VarBind list size of %d is not a factor of 4', scalar @{$var_bind}
);
}
# Initialize the "var_bind_*" data.
$this->{_var_bind_list} = {};
$this->{_var_bind_names} = [];
$this->{_var_bind_types} = {};
# Use the object's buffer to build each VarBind SEQUENCE and then append
# it to a local buffer. The local buffer will then be used to create
# the VarBindList SEQUENCE.
my ($buffer, $name_type, $name_value, $syntax_type, $syntax_value) = (q{});
while (@{$var_bind}) {
# Pull a quartet of ASN.1 types and values from the passed array.
($name_type, $name_value, $syntax_type, $syntax_value) =
splice @{$var_bind}, 0, 4;
# Reverse the order of the fields because prepare() does a prepend.
# value::=ObjectSyntax
if (!defined $this->prepare($syntax_type, $syntax_value)) {
$this->var_bind_list(undef);
return $this->_error();
}
# name::=ObjectName
if ($name_type != OBJECT_IDENTIFIER) {
$this->var_bind_list(undef);
return $this->_error(
'An ObjectName type of 0x%02x was expected, but 0x%02x was found',
OBJECT_IDENTIFIER, $name_type
);
}
if (!defined $this->prepare($name_type, $name_value)) {
$this->var_bind_list(undef);
return $this->_error();
}
# VarBind::=SEQUENCE
if (!defined $this->prepare(SEQUENCE)) {
$this->var_bind_list(undef);
return $this->_error();
}
# Append the VarBind to the local buffer and clear it.
$buffer .= $this->clear();
# Populate the "var_bind_*" data so we can provide consistent
# output for the methods regardless of whether we are a request
# or a response PDU. Make sure the HASH key is unique if in
# case duplicate OBJECT IDENTIFIERs are provided.
while (exists $this->{_var_bind_list}->{$name_value}) {
$name_value .= q{ }; # Pad with spaces
}
$this->{_var_bind_list}->{$name_value} = $syntax_value;
$this->{_var_bind_types}->{$name_value} = $syntax_type;
push @{$this->{_var_bind_names}}, $name_value;
}
# VarBindList::=SEQUENCE OF VarBind
if (!defined $this->prepare(SEQUENCE, $buffer)) {
$this->var_bind_list(undef);
return $this->_error();
}
return TRUE;
}
sub _create_oid_null_pairs
{
my ($this, $oids) = @_;
return [] if !defined $oids;
if (ref($oids) ne 'ARRAY') {
return $this->_error(
'The OBJECT IDENTIFIER list is expected as an array reference'
);
}
my $pairs = [];
for (@{$oids}) {
push @{$pairs}, OBJECT_IDENTIFIER, $_, NULL, q{};
}
return $pairs;
}
sub _create_oid_value_pairs
{
my ($this, $trios) = @_;
return [] if !defined $trios;
if (ref($trios) ne 'ARRAY') {
return $this->_error('The trio list is expected as an array reference');
}
if (@{$trios} % 3) {
return $this->_error(
'The [OBJECT IDENTIFIER, ASN.1 type, object value] trio is expected'
);
}
my $pairs = [];
for (my $i = 0; $i < $#{$trios}; $i += 3) {
push @{$pairs},
OBJECT_IDENTIFIER, $trios->[$i], $trios->[$i+1], $trios->[$i+2];
}
return $pairs;
}
sub _process_pdu_scope
{
my ($this) = @_;
return TRUE if ($this->{_version} < SNMP_VERSION_3);
# ScopedPDU::=SEQUENCE
return $this->_error() if !defined $this->process(SEQUENCE);
# contextEngineID::=OCTET STRING
if (!defined $this->context_engine_id($this->process(OCTET_STRING))) {
return $this->_error();
}
# contextName::=OCTET STRING
if (!defined $this->context_name($this->process(OCTET_STRING))) {
return $this->_error();
}
# Indicate that this PDU is scoped and return success.
return $this->{_scoped} = TRUE;
}
sub _process_pdu_sequence
{
my ($this) = @_;
# PDUs::=CHOICE
if (!defined ($this->{_pdu_type} = $this->process())) {
return $this->_error();
}
if ($this->{_pdu_type} != TRAP) { # PDU::=SEQUENCE
# request-id::=INTEGER
if (!defined ($this->{_request_id} = $this->process(INTEGER))) {
return $this->_error();
}
# error-status::=INTEGER
if (!defined ($this->{_error_status} = $this->process(INTEGER))) {
return $this->_error();
}
# error-index::=INTEGER
if (!defined ($this->{_error_index} = $this->process(INTEGER))) {
return $this->_error();
}
# Indicate that we have an SNMP error, but do not return an error.
if (($this->{_error_status}) && ($this->{_pdu_type} == GET_RESPONSE)) {
$this->_error(
'Received %s error-status at error-index %d',
_error_status_itoa($this->{_error_status}), $this->{_error_index}
);
}
} else { # Trap-PDU::=IMPLICIT SEQUENCE
# enterprise::=OBJECT IDENTIFIER
if (!defined ($this->{_enterprise} = $this->process(OBJECT_IDENTIFIER))) {
return $this->_error();
}
# agent-addr::=NetworkAddress
if (!defined ($this->{_agent_addr} = $this->process(IPADDRESS))) {
return $this->_error();
}
# generic-trap::=INTEGER
if (!defined ($this->{_generic_trap} = $this->process(INTEGER))) {
return $this->_error();
}
# specific-trap::=INTEGER
if (!defined ($this->{_specific_trap} = $this->process(INTEGER))) {
return $this->_error();
}
# time-stamp::=TimeTicks
if (!defined ($this->{_time_stamp} = $this->process(TIMETICKS))) {
return $this->_error();
}
}
return TRUE;
}
sub _process_var_bind_list
{
my ($this) = @_;
my $value;
# VarBindList::=SEQUENCE
if (!defined($value = $this->process(SEQUENCE))) {
return $this->_error();
}
# Using the length of the VarBindList SEQUENCE,
# calculate the end index.
my $end = $this->index() + $value;
$this->{_var_bind_list} = {};
$this->{_var_bind_names} = [];
$this->{_var_bind_types} = {};
my ($oid, $type);
while ($this->index() < $end) {
# VarBind::=SEQUENCE
if (!defined $this->process(SEQUENCE)) {
return $this->_error();
}
# name::=ObjectName
if (!defined ($oid = $this->process(OBJECT_IDENTIFIER))) {
return $this->_error();
}
# value::=ObjectSyntax
if (!defined ($value = $this->process(undef, $type))) {
return $this->_error();
}
# Create a hash consisting of the OBJECT IDENTIFIER as a
# key and the ObjectSyntax as the value. If there is a
# duplicate OBJECT IDENTIFIER in the VarBindList, we pad
# that OBJECT IDENTIFIER with spaces to make a unique
# key in the hash.
while (exists $this->{_var_bind_list}->{$oid}) {
$oid .= q{ }; # Pad with spaces
}
DEBUG_INFO('{ %s => %s: %s }', $oid, asn1_itoa($type), $value);
$this->{_var_bind_list}->{$oid} = $value;
$this->{_var_bind_types}->{$oid} = $type;
# Create an array with the ObjectName OBJECT IDENTIFIERs
# so that the order in which the VarBinds where encoded
# in the PDU can be retrieved later.
push @{$this->{_var_bind_names}}, $oid;
}
# Return an error based on the contents of the VarBindList
# if we received a Report-PDU.
if ($this->{_pdu_type} == REPORT) {
return $this->_report_pdu_error();
}
# Return the var_bind_list hash
return $this->{_var_bind_list};
}
{
my @error_status = qw(
noError
tooBig
noSuchName
badValue
readOnly
genError
noAccess
wrongType
wrongLength
wrongEncoding
wrongValue
noCreation
inconsistentValue
resourceUnavailable
commitFailed
undoFailed
authorizationError
notWritable
inconsistentName
);
sub _error_status_itoa
{
return '??' if (@_ != 1);
if (($_[0] > $#error_status) || ($_[0] < 0)) {
return sprintf '??(%d)', $_[0];
}
return sprintf '%s(%d)', $error_status[$_[0]], $_[0];
}
}
{
my %report_oids = (
'1.3.6.1.6.3.11.2.1.1' => 'snmpUnknownSecurityModels',
'1.3.6.1.6.3.11.2.1.2' => 'snmpInvalidMsgs',
'1.3.6.1.6.3.11.2.1.3' => 'snmpUnknownPDUHandlers',
'1.3.6.1.6.3.12.1.4' => 'snmpUnavailableContexts',
'1.3.6.1.6.3.12.1.5' => 'snmpUnknownContexts',
'1.3.6.1.6.3.15.1.1.1' => 'usmStatsUnsupportedSecLevels',
'1.3.6.1.6.3.15.1.1.2' => 'usmStatsNotInTimeWindows',
'1.3.6.1.6.3.15.1.1.3' => 'usmStatsUnknownUserNames',
'1.3.6.1.6.3.15.1.1.4' => 'usmStatsUnknownEngineIDs',
'1.3.6.1.6.3.15.1.1.5' => 'usmStatsWrongDigests',
'1.3.6.1.6.3.15.1.1.6' => 'usmStatsDecryptionErrors',
);
sub _report_pdu_error
{
my ($this) = @_;
# Remove the leading dot (if present) and replace the dotted notation
# of the OBJECT IDENTIFIER with the text ObjectName based upon an
# expected list of report OBJECT IDENTIFIERs.
my %var_bind_list;
for my $oid (@{$this->{_var_bind_names}}) {
my $text = $oid;
$text =~ s/^\.//;
for (keys %report_oids) {
if ($text =~ s/\Q$_/$report_oids{$_}/) {
last;
}
}
$var_bind_list{$text} = $this->{_var_bind_list}->{$oid};
}
my $count = keys %var_bind_list;
if ($count == 1) {
# Return the OBJECT IDENTIFIER and value.
my $text = (keys %var_bind_list)[0];
return $this->_error(
'Received %s Report-PDU with value %s', $text, $var_bind_list{$text}
);
} elsif ($count > 1) {
# Return a list of OBJECT IDENTIFIERs.
return $this->_error(
'Received Report-PDU [%s]', join ', ', keys %var_bind_list
);
} else {
return $this->_error('Received empty Report-PDU');
}
}
}
# ============================================================================
1; # [end Net::SNMP::PDU]