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package Net::Route::Parser;
use 5.008;
use Moose;
use English qw( -no_match_vars );
use POSIX qw( WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG );
use Readonly;
use Exporter qw( import );
use version; our ( $VERSION ) = '$Revision: 363 $' =~ m{(\d+)}xms;
use IPC::Run3;
# /m is broken in <5.10
## no critic (RegularExpressions::RequireLineBoundaryMatching)
# Very loose matching, it's just meant to filter lines
Readonly our $IPV4_RE => qr/ (?: \d+ \.){3} \d+ /xs;
Readonly our $IPV6_RE => qr/ (?: \p{IsXDigit}+ : :? )+ \p{IsXDigit}+ /xs;
Readonly our $IP_RE => qr/ (?: $IPV4_RE | $IPV6_RE ) /xs;
Readonly our $ROUTE_RE => qr/^ \s* ($IP_RE) \s+ ($IP_RE) \s+ ($IP_RE) \s+ ($IP_RE) \s+ (\d+) \s* $ /xs;
## use critic
our %EXPORT_TAGS = ( ip_re => [qw($IPV4_RE $IPV6_RE $IP_RE)],
route_re => [qw($ROUTE_RE)], );
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'ip_re'} }, @{ $EXPORT_TAGS{'route_re'} }, );
sub create_ip_object
{
my ( $self, $address, $mask ) = @_;
my $ip_object_ref = NetAddr::IP->new( $address, $mask );
if ( !defined $ip_object_ref )
{
$mask = defined $mask ? $mask : q{};
die "Cannot create ip object (address: $address, mask: $mask)";
}
else
{
return $ip_object_ref;
}
}
sub from_system
{
my ( $self ) = @_;
my $command_ref = $self->command_line();
my $human_command = ref $command_ref ? ( join q{ }, @{$command_ref} ) : $command_ref;
my @routes_as_text;
if ( !eval { IPC::Run3::run3( $command_ref, undef, \@routes_as_text ); 1 } )
{
die "Cannot execute '$human_command': $EVAL_ERROR";
}
if ( $CHILD_ERROR )
{
if ( $OSNAME eq 'MSWin32' )
{
die "'$human_command' returned non-zero value $CHILD_ERROR";
}
elsif ( WIFSIGNALED( $CHILD_ERROR ) )
{
die "'$human_command' died with signal ", WTERMSIG( $CHILD_ERROR );
}
elsif ( WEXITSTATUS( $CHILD_ERROR ) )
{
die "'$human_command' returned non-zero value ", WEXITSTATUS( $CHILD_ERROR );
}
}
chomp @routes_as_text;
my $routes_ref = $self->parse_routes( \@routes_as_text );
return $routes_ref;
}
no Moose;
__PACKAGE__->meta->make_immutable();
1;
__END__
=head1 NAME
Net::Route::Parser - Internal class
=head1 SYNOPSIS
Not used directly.
=head1 VERSION
Revision $Revision: 363 $.
=head1 DESCRIPTION
This is a base class for the system-specific parsers. It is not usable directly
(abstract).
System-specific parsers should inherit from this class to obtain common
functionality.
=head1 INTERFACE
This interface is subject to change until version 1.
=head2 Object Methods
=head3 from_system()
Implementation of C<Net::Route::Table::from_system()>.
=head3 command_line() [pure virtual]
What you want to read the information from, as either:
=over
=item *
a string - it will undergo shell expansion
=item *
an arrayref - the command and its arguments, without shell expansion
=back
Implement this in subclasses.
=head3 parse_routes( $text_lines_ref ) [pure virtual]
Reads and parses the routes from the output of the command, returns an arrayref
of L<Net::Route> objects.
=head3 create_ip_object ( $address, $mask )
Factory of L<NetAddr::IP> objects for centralized error management. Dies if the
arguments do not constitute a valid IP or network address.
=head1 AUTHOR
Created by Alexandre Storoz, C<< <astoroz@straton-it.fr> >>
Maintained by Thomas Equeter, C<< <tequeter@straton-it.fr> >>
=head1 LICENSE AND COPYRIGHT
Copyright (C) 2009 Straton IT.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
|
