Net-DNS/t/08-IPv6.t
#!/usr/bin/perl
# $Id: 08-IPv6.t 1965 2024-02-14 09:19:32Z willem $ -*-perl-*-
#
use strict;
use warnings;
use Test::More;
use TestToolkit;
use Net::DNS;
use IO::Select;
my $debug = 0;
my @hints = Net::DNS::Resolver->new()->_hints;
my $NOIP = qw(::);
my @nsdname = qw(
ns.net-dns.org
ns.nlnetlabs.nl
);
exit( plan skip_all => 'Online tests disabled.' ) if -e 't/online.disabled';
exit( plan skip_all => 'Online tests disabled.' ) unless -e 't/online.enabled';
exit( plan skip_all => 'IPv6 tests disabled.' ) if -e 't/IPv6.disabled';
exit( plan skip_all => 'IPv6 tests disabled.' ) unless -e 't/IPv6.enabled';
eval {
my $resolver = Net::DNS::Resolver->new( igntc => 1 );
exit plan skip_all => 'No nameservers' unless $resolver->nameservers;
my $reply = $resolver->send(qw(. NS IN)) || die $!;
my @ns = grep { $_->type eq 'NS' } $reply->answer, $reply->authority;
exit plan skip_all => 'Local nameserver broken' unless scalar @ns;
1;
} || exit( plan skip_all => "Non-responding local nameserver: $@" );
eval {
my $resolver = Net::DNS::Resolver->new( nameservers => [@hints] );
$resolver->force_v6(1);
exit plan skip_all => 'No IPv6 transport' unless $resolver->nameservers;
my $reply = $resolver->send(qw(. NS IN)) || die $!;
my $from = $reply->from();
my @ns = grep { $_->type eq 'NS' } $reply->answer, $reply->authority;
exit plan skip_all => "Unexpected response from $from" unless scalar @ns;
exit plan skip_all => "Non-authoritative response from $from" unless $reply->header->aa;
1;
} || exit( plan skip_all => "Cannot access global root nameservers: $@" );
my $IP = eval {
my $resolver = Net::DNS::Resolver->new();
$resolver->nameservers(@nsdname);
$resolver->force_v6(1);
[$resolver->nameservers()];
} || [];
exit( plan skip_all => 'Unable to resolve nameserver name' ) unless scalar @$IP;
diag join( "\n\t", 'will use nameservers', @$IP ) if $debug;
Net::DNS::Resolver->debug($debug);
plan tests => 62;
NonFatalBegin();
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP, dnsrch => 1 );
ok( $resolver->search('ns.net-dns.org.'), '$resolver->search(ns.net-dns.org.)' );
ok( !$resolver->search('nx.net-dns.org.'), '$resolver->search(nx.net-dns.org.)' );
my $packet = Net::DNS::Packet->new(qw(net-dns.org SOA IN));
ok( $resolver->send($packet), '$resolver->send(...) UDP' );
$packet->edns->option( PADDING => ( 'OPTION-LENGTH' => 500 ) ); # force TCP
ok( $resolver->send($packet), '$resolver->send(...) TCP' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->dnssec(1);
$resolver->udppacketsize(513);
$resolver->igntc(1);
my $udp = $resolver->send(qw(net-dns.org DNSKEY IN));
ok( $udp && $udp->header->tc, '$resolver->send(...) truncated UDP reply' );
$resolver->igntc(0);
my $retry = $resolver->send(qw(net-dns.org DNSKEY IN));
ok( $retry && !$retry->header->tc, '$resolver->send(...) automatic TCP retry' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->igntc(0);
my $packet = Net::DNS::Packet->new(qw(net-dns.org SOA IN));
my $udp = $resolver->bgsend($packet);
ok( $udp, '$resolver->bgsend(...) UDP' );
while ( $resolver->bgbusy($udp) ) { sleep 1; }
ok( $resolver->bgread($udp), '$resolver->bgread($udp)' );
$packet->edns->option( PADDING => ( 'OPTION-LENGTH' => 500 ) ); # force TCP
my $tcp = $resolver->bgsend($packet);
ok( $tcp, '$resolver->bgsend(...) TCP' );
while ( $resolver->bgbusy($tcp) ) { sleep 1; }
ok( $resolver->bgread($tcp), '$resolver->bgread($tcp)' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->dnssec(1);
$resolver->udppacketsize(513);
$resolver->igntc(1);
my $handle = $resolver->bgsend(qw(net-dns.org DNSKEY IN));
ok( $handle, '$resolver->bgsend(...) truncated UDP' );
my $packet = $resolver->bgread($handle);
ok( $packet && $packet->header->tc, '$resolver->bgread($udp) ignore UDP truncation' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->dnssec(1);
$resolver->udppacketsize(513);
$resolver->igntc(0);
my $handle = $resolver->bgsend(qw(net-dns.org DNSKEY IN));
ok( $handle, '$resolver->bgsend(...) truncated UDP' );
my $udp = $handle;
my $packet = $resolver->bgread($handle);
isnt( $handle, $udp, '$resolver->bgbusy($udp) handle changed to TCP' );
ok( $packet && !$packet->header->tc, '$resolver->bgread($udp) background TCP retry' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->dnssec(1);
$resolver->udppacketsize(513);
$resolver->igntc(0);
my $handle = $resolver->bgsend(qw(net-dns.org DNSKEY IN));
$resolver->nameserver(); # no nameservers
my $packet = $resolver->bgread($handle);
ok( $packet && $packet->header->tc, '$resolver->bgread($udp) background TCP fail' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->persistent_udp(1);
my $handle = $resolver->bgsend(qw(net-dns.org SOA IN));
ok( $handle, '$resolver->bgsend(...) persistent UDP' );
my $bgread = $resolver->bgread($handle);
ok( $bgread, '$resolver->bgread($udp)' );
my $test = $resolver->bgsend(qw(net-dns.org SOA IN));
ok( $test, '$resolver->bgsend(...) persistent UDP' );
is( $test, $handle, 'same UDP socket object used' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->persistent_tcp(1);
$resolver->usevc(1);
my $handle = $resolver->bgsend(qw(net-dns.org SOA IN));
ok( $handle, '$resolver->bgsend(...) persistent TCP' );
my $bgread = $resolver->bgread($handle);
ok( $bgread, '$resolver->bgread($tcp)' );
my $test = $resolver->bgsend(qw(net-dns.org SOA IN));
ok( $test, '$resolver->bgsend(...) persistent TCP' );
is( $test, $handle, 'same TCP socket object used' );
eval { close($handle) };
my $recover = $resolver->bgsend(qw(net-dns.org SOA IN));
ok( $recover, 'connection recovered after close' );
}
my $tsig_key = eval {
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->domain('net-dns.org');
my @answer = $resolver->query(qw(tsig-md5 KEY))->answer;
shift @answer;
};
my $bad_key = Net::DNS::RR->new('MD5.example KEY 512 3 157 MD5keyMD5keyMD5keyMD5keyMD5=');
SKIP: {
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
eval { $resolver->tsig($tsig_key) };
skip( 'automatic TSIG tests', 3 ) if $@;
$resolver->igntc(1);
my $udp = $resolver->send(qw(net-dns.org SOA IN));
ok( $udp, '$resolver->send(...) UDP + automatic TSIG' );
$resolver->usevc(1);
my $tcp = $resolver->send(qw(net-dns.org SOA IN));
ok( $tcp, '$resolver->send(...) TCP + automatic TSIG' );
my $bgread;
foreach my $ip (@$IP) {
$resolver->nameserver($ip);
my $handle = $resolver->bgsend(qw(net-dns.org SOA IN));
last if $bgread = $resolver->bgread($handle);
}
ok( $bgread, '$resolver->bgsend/read TCP + automatic TSIG' );
}
SKIP: {
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->igntc(1);
eval { $resolver->tsig($bad_key) };
skip( 'failed TSIG tests', 3 ) if $@;
my $udp = $resolver->send(qw(net-dns.org SOA IN));
ok( !$udp, '$resolver->send(...) UDP + failed TSIG' );
$resolver->usevc(1);
my $tcp = $resolver->send(qw(net-dns.org SOA IN));
ok( !$tcp, '$resolver->send(...) TCP + failed TSIG' );
my $handle = $resolver->bgsend(qw(net-dns.org SOA IN));
my $bgread = $resolver->bgread($handle);
ok( !$bgread, '$resolver->bgsend/read TCP + failed TSIG' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
my $udp = $resolver->query(qw(bogus.net-dns.org A IN));
ok( !$udp, '$resolver->query() nonexistent name UDP' );
$resolver->usevc(1);
my $tcp = $resolver->query(qw(bogus.net-dns.org A IN));
ok( !$tcp, '$resolver->query() nonexistent name TCP' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
my $update = Net::DNS::Update->new(qw(example.com));
ok( $resolver->send($update), '$resolver->send($update) UDP' );
$resolver->usevc(1);
ok( $resolver->send($update), '$resolver->send($update) TCP' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
my $mx = 'mx2.t.net-dns.org';
my @rr = rr( $resolver, $mx, 'MX' );
is( scalar(@rr), 2, 'Net::DNS::rr() works with specified resolver' );
is( scalar rr( $resolver, $mx, 'MX' ), 2, 'Net::DNS::rr() works in scalar context' );
is( scalar rr( $mx, 'MX' ), 2, 'Net::DNS::rr() works with default resolver' );
}
{
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
my $mx = 'mx2.t.net-dns.org';
my @mx = mx( $resolver, $mx );
is( scalar(@mx), 2, 'Net::DNS::mx() works with specified resolver' );
# some people seem to use mx() in scalar context
is( scalar mx( $resolver, $mx ), 2, 'Net::DNS::mx() works in scalar context' );
is( scalar mx($mx), 2, 'Net::DNS::mx() works with default resolver' );
is( scalar mx('bogus.t.net-dns.org'), 0, "Net::DNS::mx() works for bogus name" );
}
SKIP: {
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->tcp_timeout(10);
my @zone = $resolver->axfr('net-dns.org');
ok( scalar(@zone), '$resolver->axfr() returns entire zone in list context' );
my @notauth = $resolver->axfr('bogus.net-dns.org');
my $notauth = $resolver->errorstring;
ok( !scalar(@notauth), "mismatched zone\t[$notauth]" );
my $iterator = $resolver->axfr('net-dns.org');
ok( ref($iterator), '$resolver->axfr() returns iterator in scalar context' );
skip( 'AXFR iterator tests', 4 ) unless $iterator;
my $soa = $iterator->();
is( ref($soa), 'Net::DNS::RR::SOA', '$iterator->() returns initial SOA RR' );
my $iterations;
$soa->serial(undef) if $soa; # force SOA mismatch
exception( 'mismatched SOA serial', sub { $iterations++ while $iterator->() } );
ok( $iterations, '$iterator->() iterates through remaining RRs' );
is( $iterator->(), undef, '$iterator->() returns undef after last RR' );
}
SKIP: {
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->domain('net-dns.org');
eval { $resolver->tsig($tsig_key) };
skip( 'TSIG AXFR tests', 4 ) if $@;
$resolver->tcp_timeout(10);
my @zone = $resolver->axfr();
ok( scalar(@zone), '$resolver->axfr() with TSIG verify' );
my @notauth = $resolver->axfr('bogus.net-dns.org');
my $notauth = $resolver->errorstring;
ok( !scalar(@notauth), "mismatched zone\t[$notauth]" );
eval { $resolver->tsig($bad_key) };
skip( 'AXFR failure reporting', 2 ) if $@;
my @unverifiable = $resolver->axfr();
my $errorstring = $resolver->errorstring;
ok( !scalar(@unverifiable), "mismatched key\t[$errorstring]" );
}
SKIP: {
my $resolver = Net::DNS::Resolver->new( nameservers => $NOIP );
eval { $resolver->tsig($tsig_key) };
skip( 'TSIG bgsend tests', 2 ) if $@;
my $query = Net::DNS::Packet->new(qw(. SOA IN));
ok( $resolver->bgsend($query), '$resolver->bgsend() + automatic TSIG' );
ok( $resolver->bgsend($query), '$resolver->bgsend() + existing TSIG' );
}
{
my $resolver = Net::DNS::Resolver->new();
$resolver->nameserver('cname.t.net-dns.org');
ok( scalar( $resolver->nameservers ), 'resolve nameserver cname' );
}
{ ## exercise error paths in _axfr_next()
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->tcp_timeout(10);
exception( 'TCP time out', sub { $resolver->_axfr_next( IO::Select->new ) } );
my $packet = Net::DNS::Packet->new(qw(net-dns.org SOA));
my $socket = $resolver->_bgsend_tcp( $packet, $packet->data );
my $select = IO::Select->new($socket);
while ( $resolver->bgbusy($socket) ) { sleep 1 }
my $discarded = ''; ## [size][id][status] [qdcount]...
$socket->recv( $discarded, 6 ) if $socket;
exception( 'corrupt data', sub { $resolver->_axfr_next($select) } );
}
SKIP: {
my $resolver = Net::DNS::Resolver->new( nameservers => $IP );
$resolver->domain('net-dns.org');
eval { $resolver->tsig($tsig_key) };
$resolver->tcp_timeout(10);
my $packet = $resolver->_make_query_packet(qw(net-dns.org SOA));
my $socket = $resolver->_bgsend_tcp( $packet, $packet->data );
my $tsigrr = $packet->sigrr;
skip( 'verify fail', 1 ) unless $tsigrr;
my $select = IO::Select->new($socket);
exception( 'verify fail', sub { $resolver->_axfr_next( $select, $tsigrr ) } );
}
{ ## exercise error paths in _send_udp et al
my $resolver = Net::DNS::Resolver->new( nameservers => $IP, retry => 1 );
my $original = Net::DNS::Packet->new(qw(net-dns.org SOA));
my $mismatch = Net::DNS::Packet->new(qw(net-dns.org SOA));
ok( !$resolver->_send_tcp( $original, $mismatch->data ), '_send_tcp() id mismatch' );
ok( !$resolver->_send_udp( $original, $mismatch->data ), '_send_udp() id mismatch' );
my $handle = $resolver->_bgsend_udp( $original, $mismatch->data );
$resolver->udp_timeout(1);
ok( !$resolver->bgread($handle), 'bgread() id mismatch' );
ok( !$resolver->bgread( ref($handle)->new ), 'bgread() timeout' );
}
NonFatalEnd();
exit;
__END__