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#!/usr/bin/perl
# $Id: 05-OPT.t 1996 2024-12-16 13:05:08Z willem $ -*-perl-*-
#
use strict;
use warnings;
use Test::More tests => 89;
use TestToolkit;
use Net::DNS;
use Net::DNS::Parameters;
use constant UTIL => scalar eval { require Scalar::Util; Scalar::Util->can('isdual') }; ## no critic
my $code = 41;
my $type = 'OPT';
my @attr = qw( version udpsize rcode flags );
my $wire = '0000290000000000000000';
my $typecode = unpack 'xn', Net::DNS::RR->new( type => $type )->encode;
is( $typecode, $code, "$type RR type code = $code" );
for my $edns ( Net::DNS::Packet->new()->edns ) {
my $encoded = $edns->encode;
my $decoded = Net::DNS::RR->decode( \$encoded );
my $hex1 = uc unpack 'H*', $encoded;
my $hex2 = uc unpack 'H*', $decoded->encode;
is( $hex1, $hex2, 'encode/decode transparent' );
is( $hex1, $wire, 'encoded RDATA matches example' );
like( $edns->string, '/EDNS-VERSION/', '$edns->string works' );
$edns->rdata( pack 'H*', '00040002beef' );
like( $edns->plain, '/TYPE41/', '$edns->generic works' ); # join token(generic)
$edns->version(1);
like( $edns->string, '/EDNS-VERSION/', '$edns->string (version 1)' );
foreach (@attr) {
my $changed = 0xbeef;
is( $edns->$_($changed), $changed, "edns->$_(x) returns function argument" );
is( $edns->$_(), $changed, "edns->$_() returns changed value" );
$edns->$_(0);
}
foreach my $method (qw(class ttl size)) {
exception( "deprecated $method method", sub { $edns->$method(512) } );
noexception( "$method warning not repeated", sub { $edns->$method(512) } );
}
}
for my $edns ( Net::DNS::Packet->new()->edns ) {
is( scalar( $edns->options ), 0, 'EDNS option list initially empty' );
my $non_existent = $edns->option(0);
is( $non_existent, undef, 'non-existent option(0) returns undef' );
ok( !$edns->_specified, 'state unmodified by existence probe' );
$edns->option( 0 => '' );
is( scalar( $edns->options ), 1, 'insert EDNS option' );
$edns->option( 0 => undef );
is( scalar( $edns->options ), 0, 'delete EDNS option' );
ok( !$edns->_specified, 'state unmodified following delete' );
my @transgression = ( {8 => {"FAMILY" => 99}}, {8 => {"BASE16" => '00990000'}}, {65001 => []} );
foreach (@transgression) {
my @test = _presentable($_);
my ($option) = keys %$_;
exception( "compose(@test)", sub { $edns->option(%$_); my @value = $edns->option($option) } );
}
}
my $edns = Net::DNS::Packet->new()->edns;
foreach my $option ( keys %Net::DNS::Parameters::ednsoptionbyval ) {
$edns->option( $option => {'BASE16' => '076578616d706c6500'} );
}
my @testcase = (
["LLQ" => {"BASE16" => "000100000000000000000000000000000000"}],
[["NSID" => {"OPTION-DATA" => "rawbytes"}], ["NSID" => {"IDENTIFIER" => "7261776279746573"}]],
["4" => {"OPTION-DATA" => ""}],
["DAU" => ( 8, 10, 13, 14, 15, 16 )],
["DHU" => ( 1, 2, 4 )],
["N3U" => 1],
["CLIENT-SUBNET" => ( "FAMILY" => 1, "ADDRESS" => "192.0.2.1", "SOURCE-PREFIX" => 24 )],
["CLIENT-SUBNET" => {"BASE16" => "0002380020010db8fd1342"}],
["EXPIRE" => 604800],
[["COOKIE" => ["7261776279746573", ""]], ["COOKIE" => "7261776279746573"]],
["TCP-KEEPALIVE" => 200],
[["PADDING" => {"OPTION-DATA" => ""}], ["PADDING" => 0], ["PADDING" => ""]],
["PADDING" => {"OPTION-DATA" => "rawbytes"}],
["PADDING" => 100],
["CHAIN" => {"BASE16" => "076578616d706c6500"}],
["KEY-TAG" => ( 29281, 30562, 31092, 25971 )],
["EXTENDED-ERROR" => ( "INFO-CODE" => 0, "EXTRA-TEXT" => '{"JSON":"EXAMPLE"}' )],
["EXTENDED-ERROR" => ( "INFO-CODE" => 0, "EXTRA-TEXT" => '{JSON: unparsable}' )],
["EXTENDED-ERROR" => ( "INFO-CODE" => 123 )],
["REPORT-CHANNEL" => ( "AGENT-DOMAIN" => "example." )],
[["ZONEVERSION" => ""], ["ZONEVERSION" => {"OPTION-DATA" => ""}], ["ZONEVERSION" => []]],
["ZONEVERSION" => [2, 0, "12345678"]],
);
foreach (@testcase) {
my ( $canonical, @alternative ) = ref( $$_[0] ) eq 'ARRAY' ? @$_ : $_;
my ( $option, @value ) = @$canonical;
my @presentable = _presentable(@value);
$edns->option( $option => @value );
my $result = $edns->option($option);
ok( defined($result), qq[compose( "$option" => @presentable )] );
my $expect = defined($result) ? unpack( 'H*', $result ) : $result;
my ($interpretation) = $edns->option($option); # check option interpretation
foreach ( [%$interpretation], @alternative ) {
my ( $option, @value ) = @$_;
my @presentable = _presentable(@value);
$edns->option( $option, @value );
my $value = $edns->option($option);
my $result = defined($value) ? unpack( 'H*', $value ) : $value;
is( $result, $expect, qq[compose( "$option" => @presentable )] );
}
}
is( Net::DNS::RR::OPT::_JSONify(undef), 'null', '_JSONify undef' );
is( Net::DNS::RR::OPT::_JSONify(1234567), '1234567', '_JSONify integer' );
is( Net::DNS::RR::OPT::_JSONify('12345'), '12345', '_JSONify string integer' );
is( Net::DNS::RR::OPT::_JSONify('1.234'), '1.234', '_JSONify string non-integer' );
is( Net::DNS::RR::OPT::_JSONify('1e+20'), '1e+20', '_JSONify string with exponent' );
is( Net::DNS::RR::OPT::_JSONify('abcde'), '"abcde"', '_JSONify non-numeric string' );
is( Net::DNS::RR::OPT::_JSONify('\\092'), '"\\\\092"', '_JSONify escape character' );
my @json = Net::DNS::RR::OPT::_JSONify( {'BASE16' => '1234'} );
is( "@json", qq[{"BASE16": "1234"}], 'short BASE16 string' );
$edns->print;
my $options = $edns->options;
my $encoded = $edns->encode;
my $decoded = Net::DNS::RR->decode( \$encoded );
my @result = $decoded->options;
is( scalar(@result), $options, "expected number of options ($options)" );
my $multiple = '. 0 CLASS0 TYPE41 \# 30 00130006010012345678 00130006020012345678 00130006030012345678';
for my $edns ( Net::DNS::RR->new($multiple) ) {
my $encoded = $edns->encode;
my $decoded = Net::DNS::RR->decode( \$encoded );
my @value = $decoded->option('ZONEVERSION');
is( scalar(@value), 3, 'EDNS multi-instance ZONEVERSION option' );
$edns->print;
}
exit;
sub _presentable {
my ( $value, @list ) = @_;
if ( scalar @list ) { ## unstructured argument list
my @token = _presentable( [$value, @list] );
pop @token;
shift @token;
return @token;
}
if ( ref($value) eq 'HASH' ) {
my @tags = keys %$value;
my $tail = pop @tags;
my @body = map {
my ( $a, @z ) = _presentable( $$value{$_} );
unshift @z, qq("$_" => $a);
$z[-1] .= ',';
@z;
} @tags;
my ( $a, @tail ) = _presentable( $$value{$tail} );
unshift @tail, qq("$tail" => $a);
return ( '{', @body, @tail, '}' );
}
if ( ref($value) eq 'ARRAY' ) {
my @array = @$value;
return qq([ ]) unless scalar @array;
my @tail = _presentable( pop @array );
my @body = map { my @x = _presentable($_); $x[-1] .= ','; @x } @array;
return ( '[', @body, @tail, ']' );
}
my $string = "$value"; ## stringify, then use isdual() as discriminant
return $string if UTIL && Scalar::Util::isdual($value); # native integer
for ($string) {
unless ( utf8::is_utf8($value) ) {
return $_ if /^-?\d{1,10}$/; # integer (string representation)
return $_ if /^-?\d+\.\d+$/; # non-integer
return $_ if /^-?\d(\.\d*)?e[+-]\d\d?$/;
}
s/^"(.*)"$/$1/; # strip enclosing quotes
s/"/\\"/g; # escape interior quotes
}
return qq("$string");
}
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