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#-*- 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;
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