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Current File : /usr/share/perl5/Mail/SPF/Mod/Redirect.pm
#
# Mail::SPF::Mod::Redirect
# SPF record "redirect" modifier class.
#
# (C) 2005-2012 Julian Mehnle <julian@mehnle.net>
#     2005      Shevek <cpan@anarres.org>
# $Id: Redirect.pm 57 2012-01-30 08:15:31Z julian $
#
##############################################################################

package Mail::SPF::Mod::Redirect;

=head1 NAME

Mail::SPF::Mod::Redirect - SPF record C<redirect> modifier class

=cut

use warnings;
use strict;

use Mail::SPF::Mod;
use base 'Mail::SPF::GlobalMod';

use constant TRUE   => (0 == 0);
use constant FALSE  => not TRUE;

use constant name           => 'redirect';
use constant name_pattern   => qr/${\name}/i;

use constant precedence     => 0.8;

=head1 DESCRIPTION

An object of class B<Mail::SPF::Mod::Redirect> represents an SPF record
modifier of type C<redirect>.

=head2 Constructors

The following constructors are provided:

=over

=item B<new(%options)>: returns I<Mail::SPF::Mod::Redirect>

Creates a new SPF record C<redirect> modifier object.

%options is a list of key/value pairs representing any of the following
options:

=over

=item B<domain_spec>

See L<Mail::SPF::Mod/new>.

=back

=item B<new_from_string($text, %options)>: returns I<Mail::SPF::Mod::Redirect>;
throws I<Mail::SPF::ENothingToParse>, I<Mail::SPF::EInvalidMod>

Creates a new SPF record C<redirect> modifier object by parsing the string and
any options given.

=back

=head2 Class methods

The following class methods are provided:

=over

=item B<name>: returns I<string>

Returns B<'redirect'>.

=item B<name_pattern>: returns I<Regexp>

Returns a regular expression that matches a modifier name of B<'redirect'>.

=item B<precedence>: returns I<real>

Returns a precedence value of B<0.8>.  See L<Mail::SPF::Mod/precedence>.

=back

=head2 Instance methods

The following instance methods are provided:

=over

=cut

sub parse_params {
    my ($self) = @_;
    $self->parse_domain_spec(TRUE);
    return;
}

=item B<params>

See L<Mail::SPF::Mod/params>.

=cut

sub params {
    my ($self) = @_;
    return $self->{domain_spec};
}

=item B<domain_spec>: returns I<Mail::SPF::MacroString>

Returns the C<domain-spec> parameter of the modifier.

=cut

# Make read-only accessor:
__PACKAGE__->make_accessor('domain_spec', TRUE);

=item B<process($server, $request, $result)>: throws I<Mail::SPF::Result>

If no mechanism matched during the evaluation of the current SPF record,
performs a recursive SPF check using the given SPF server and request objects
and substituting the modifier's target domain name for the request's authority
domain.  The result of the recursive SPF check is then thrown as the result of
the current record's evaluation.  However, if the target domain has no
acceptable SPF record, a C<permerror> result is thrown.  See RFC 4408, 6.1, for
details.

=cut

sub process {
    my ($self, $server, $request, $result) = @_;

    $server->count_dns_interactive_term($request);

    # Only perform redirection if no mechanism matched (RFC 4408, 6.1/1):
    $result->isa('Mail::SPF::Result::NeutralByDefault')
        or return;

    # Create sub-request with mutated authority domain:
    my $authority_domain = $self->{domain_spec}->new(server => $server, request => $request);
    my $sub_request = $request->new_sub_request(authority_domain => $authority_domain);

    # Process sub-request:
    $result = $server->process($sub_request);

    # Translate result of sub-request (RFC 4408, 6.1/4):
    $server->throw_result('permerror', $request,
        "Redirect domain '$authority_domain' has no applicable sender policy")
        if $result->isa('Mail::SPF::Result::None');

    # Propagate any other results as-is:
    $result->throw();
}

=back

See L<Mail::SPF::Mod> for other supported instance methods.

=head1 SEE ALSO

L<Mail::SPF>, L<Mail::SPF::Mod>, L<Mail::SPF::Term>, L<Mail::SPF::Record>

L<http://tools.ietf.org/html/rfc4408>

For availability, support, and license information, see the README file
included with Mail::SPF.

=head1 AUTHORS

Julian Mehnle <julian@mehnle.net>, Shevek <cpan@anarres.org>

=cut

TRUE;

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