File Coverage

blib/lib/Net/Frame/Layer/IPv6/Option.pm

Criterion	Covered	Total	%
statement	26	43	60.4
branch	7	20	35.0
condition			n/a
subroutine	6	9	66.6
pod	6	6	100.0
total	45	78	57.6

#
# $Id: Option.pm 47 2015-01-20 18:20:28Z gomor $
#
package Net::Frame::Layer::IPv6::Option;
use strict;
use warnings;

use Net::Frame::Layer qw(:consts :subs);
our @ISA = qw(Net::Frame::Layer);

our @AS = qw(
   type
   length
   value
);
__PACKAGE__->cgBuildIndices;
__PACKAGE__->cgBuildAccessorsScalar(\@AS);

sub new {
   shift->SUPER::new(
      type   => 1,
      length => 0,
      value  => '',
      @_,
   );
}

sub getLength {
   my $self = shift;

   if ($self->type == 0) {  # Pad1, only type is used
      return 1;
   }

   return length($self->value) + 2;
}

sub pack {
   my $self = shift;

   my $raw = $self->SUPER::pack('C', $self->type)
      or return;

   if ($self->type != 0) {  # Not a Pad1 option
      $raw .= $self->SUPER::pack('Ca*', $self->length, $self->value)
         or return;
   }

   return $self->raw($raw);
}

sub unpack {
   my $self = shift;

   my ($type, $payload) = $self->SUPER::unpack('C a*', $self->raw)
      or return;
   $self->type($type);

   if ($self->type != 0) {  # Not a Pad1 option
      my ($length, $tail) = $self->SUPER::unpack('C a*', $payload)
         or return;

      my $value = '';
      ($value, $payload) = $self->SUPER::unpack("a$length a*", $tail)
         or return;

      $self->length($length);
      $self->value($value);
   }

   $self->payload($payload);

   return $self;
}

sub computeLengths {
   my $self = shift;

   my $length = 0;
   if ($self->type != 0) { #  Not a Pad1 option
      $length = length($self->value);
   }
   $self->length($length);

   return 1;
}

sub print {
   my $self = shift;

   my $buf = '';
   my $l   = $self->layer;
   if ($self->type == 0x00) {  # Pad1 specific type
      $buf .= sprintf "$l: type:0x%02x", $self->type;
   }
   else {
      $buf .= sprintf "$l: type:0x%02x  length:%d  value:%s",
         $self->type, $self->length, CORE::unpack('H*', $self->value);
   }

   return $buf;
}

1;

__END__