Initial Commit

database/perl/vendor/lib/Net/DNS/Resolver/MSWin32.pm

@@ -0,0 +1,142 @@
+package Net::DNS::Resolver::MSWin32;
+
+use strict;
+use warnings;
+our $VERSION = (qw$Id: MSWin32.pm 1812 2020-10-07 18:09:53Z willem $)[2];
+
+
+=head1 NAME
+
+Net::DNS::Resolver::MSWin32 - MS Windows resolver class
+
+=cut
+
+
+use base qw(Net::DNS::Resolver::Base);
+use Carp;
+
+use constant WINHLP => defined eval 'require Win32::IPHelper';	## no critic
+use constant WINREG => defined eval 'use Win32::TieRegistry qw(KEY_READ REG_DWORD); 1';	## no critic
+
+our $Registry;
+
+
+sub _init {
+	my $defaults = shift->_defaults;
+
+	my $debug = 0;
+
+	my $FIXED_INFO = {};
+
+	my $err = Win32::IPHelper::GetNetworkParams($FIXED_INFO);
+	croak "GetNetworkParams() error %u: %s\n", $err, Win32::FormatMessage($err) if $err;
+
+	if ($debug) {
+		require Data::Dumper;
+		print Data::Dumper::Dumper $FIXED_INFO;
+	}
+
+
+	my @nameservers = map { $_->{IpAddress} } @{$FIXED_INFO->{DnsServersList}};
+	$defaults->nameservers(@nameservers);
+
+	my $devolution = 0;
+	my $domainname = $FIXED_INFO->{DomainName} || '';
+	my @searchlist = grep {length} $domainname;
+
+	if (WINREG) {
+
+		# The Win32::IPHelper does not return searchlist.
+		# Make best effort attempt to get searchlist from the registry.
+
+		my @root = qw(HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services);
+
+		my $leaf = join '\\', @root, qw(Tcpip Parameters);
+		my $reg_tcpip = $Registry->Open( $leaf, {Access => KEY_READ} );
+
+		unless ( defined $reg_tcpip ) {			# Didn't work, Win95/98/Me?
+			$leaf = join '\\', @root, qw(VxD MSTCP);
+			$reg_tcpip = $Registry->Open( $leaf, {Access => KEY_READ} );
+		}
+
+		if ( defined $reg_tcpip ) {
+			my $searchlist = $reg_tcpip->GetValue('SearchList') || '';
+			push @searchlist, split m/[\s,]+/, $searchlist;
+
+			my ( $value, $type ) = $reg_tcpip->GetValue('UseDomainNameDevolution');
+			$devolution = defined $value && $type == REG_DWORD ? hex $value : 0;
+		}
+	}
+
+
+	# fix devolution if configured, and simultaneously
+	# eliminate duplicate entries (but keep the order)
+	my @list;
+	my %seen;
+	foreach (@searchlist) {
+		s/\.+$//;
+		push( @list, $_ ) unless $seen{lc $_}++;
+
+		next unless $devolution;
+
+		# while there are more than two labels, cut
+		while (s#^[^.]+\.(.+\..+)$#$1#) {
+			push( @list, $_ ) unless $seen{lc $_}++;
+		}
+	}
+	$defaults->searchlist(@list);
+
+	%$defaults = Net::DNS::Resolver::Base::_untaint(%$defaults);
+
+	$defaults->_read_env;
+	return;
+}
+
+
+1;
+__END__
+
+
+=head1 SYNOPSIS
+
+    use Net::DNS::Resolver;
+
+=head1 DESCRIPTION
+
+This class implements the OS specific portions of C<Net::DNS::Resolver>.
+
+No user serviceable parts inside, see L<Net::DNS::Resolver>
+for all your resolving needs.
+
+=head1 COPYRIGHT
+
+Copyright (c)2003 Chris Reinhardt.
+
+Portions Copyright (c)2009 Olaf Kolkman, NLnet Labs
+
+All rights reserved.
+
+=head1 LICENSE
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted, provided
+that the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation, and that the name of the author not be used in advertising
+or publicity pertaining to distribution of the software without specific
+prior written permission.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+
+=head1 SEE ALSO
+
+L<perl>, L<Net::DNS>, L<Net::DNS::Resolver>
+
+=cut
+