1 files changed, 174 insertions, 0 deletions
diff --git a/fml/lib/Netlib/INET6.pm b/fml/lib/Netlib/INET6.pm
new file mode 100644
index 00000000..ac84afa7
--- /dev/null
+++ b/fml/lib/Netlib/INET6.pm
@@ -0,0 +1,174 @@
+#-*- perl -*-
+#
+#  Copyright (C) 2001 Ken'ichi Fukamachi
+#   All rights reserved. This program is free software; you can
+#   redistribute it and/or modify it under the same terms as Perl itself. 
+#
+# $Id$
+# $FML$
+#
+
+package Netlib::INET6;
+use strict;
+use vars qw(@ISA @EXPORT @EXPORT_OK);
+use Carp;
+use Netlib::Utils;
+
+require Exporter;
+
+@ISA       = qw(Exporter);
+@EXPORT    = qw(is_ipv6_ready is_ipv6_mta_syntax _connect6);
+
+sub _we_can_use_Socket6
+{
+    my ($self, $args) = @_;
+
+    eval q{ 
+	use Socket; 
+	use Socket6;
+    };
+
+    if ($@ =~ /Can\'t locate Socket6.pm/) { 
+	$self->{_ipv6_ready} = 'no';
+    }
+    else {
+	Log("IPv6 ready");
+	$self->{_ipv6_ready} = 'yes';
+    }
+}
+
+
+sub is_ipv6_ready
+{
+    my ($self, $args) = @_;
+
+    # probe the IPv6 availability for the first time
+    unless ($self->{_ipv6_ready}) {
+	_we_can_use_Socket6($self, $args);
+    };
+
+    $self->{_ipv6_ready} eq 'yes' ? 1 : 0;
+}
+
+
+sub is_ipv6_mta_syntax
+{
+    my ($self, $host) = @_;
+    my ($x_host, $x_port);
+
+    # check the mta syntax whether it is ipv6 form or not.
+    if ( $host =~ /\[([\d:]+)\]:(\d+)/) {
+	($x_host, $x_port) = ($1, $2);
+	return ($x_host, $x_port);
+    }
+    else {
+	return wantarray ? () : undef;
+    }
+}
+
+
+sub _connect6
+{
+    my ($self, $args) = @_;
+    my $mta = $args->{ _mta };
+
+    # check the mta syntax is $ipv6_addr:$port or not.
+    my ($host, $port) = $self->is_ipv6_mta_syntax( $args->{ _mta } );
+
+    # if mta is ipv6 raw address syntax, 
+    # try to parse $mta to $host:$port style.
+    unless ($host) {
+	if ($mta =~ /(\S+):(\S+)/) {
+	    ($host, $port) = ($1, $2);
+	}
+    }
+
+    # hmm, invalid MTA
+    unless ($host && $port) {
+	Log("_connect6: cannot find mta=$mta");
+	$self->{_socket} = undef;
+	return undef;
+    }
+
+    $self->{_socket} = undef;
+    return undef;
+
+    eval q{
+	use IO::Handle;
+	use Socket; 
+	use Socket6;
+
+	my ($family, $type, $proto, $saddr, $canonname);
+	my $fh = new IO::Socket;
+	my $inet6_family = &AF_INET6;
+
+	# resolve socket info by getaddrinfo()
+	my @res = getaddrinfo($host, $port, AF_UNSPEC, SOCK_STREAM);
+	$family = -1;
+
+      LOOP:
+	while (scalar(@res) >= 5) {
+	    ($family, $type, $proto, $saddr, $canonname, @res) = @res;
+
+	    my ($host, $port) = 
+		getnameinfo($saddr, NI_NUMERICHOST | NI_NUMERICSERV);
+
+	    # check only IPv6 case here.
+	    next LOOP if $family != $inet6_family;
+
+	    socket($fh, $family, $type, $proto) || do {
+		Log("Error: cannot create IPv6 socket");
+		next LOOP;
+	    };
+	    if (connect($fh, $saddr)) {
+		Log("(debug6) o.k. connect $host");
+		last LOOP;
+	    }
+	    else {
+		Log("Error: cannot connect via IPv6");
+	    }
+
+	    $family = -1;
+	}
+
+	if ($family != -1) {
+	    $self->{_socket} = $fh;
+	    Log("connected to $host:$port by IPv6");
+	} else {
+	    $self->{_socket} = undef;
+	    Log("(debug6) fail to connect $host:$port by IPv6");
+	}
+    };
+}
+
+
+=head1 NAME
+
+FML::__HERE_IS_YOUR_MODULE_NAME__.pm - what is this
+
+
+=head1 SYNOPSIS
+
+=head1 DESCRIPTION
+
+=head2 new
+
+=item Function()
+
+
+=head1 AUTHOR
+
+=head1 COPYRIGHT
+
+Copyright (C) 2001 __YOUR_NAME__
+
+All rights reserved. This program is free software; you can
+redistribute it and/or modify it under the same terms as Perl itself. 
+
+=head1 HISTORY
+
+FML::__MODULE_NAME__.pm appeared in fml5.
+
+=cut
+
+1;