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lib/Net/Frame/Layer/ICMPv6/MLD/Report/Record.pm  view on Meta::CPAN

      NF_MLD_REPORTv2TYPE_MODEEXCLUDE
      NF_MLD_REPORTv2TYPE_CHANGEINCLUDE
      NF_MLD_REPORTv2TYPE_CHANGEEXCLUDE
      NF_MLD_REPORTv2TYPE_ALLOWNEW
      NF_MLD_REPORTv2TYPE_BLOCKOLD
   )],
);
our @EXPORT_OK = (
   @{$EXPORT_TAGS{consts}},
);

use constant NF_MLD_REPORTv2TYPE_MODEINCLUDE   => 1;
use constant NF_MLD_REPORTv2TYPE_MODEEXCLUDE   => 2;
use constant NF_MLD_REPORTv2TYPE_CHANGEINCLUDE => 3;
use constant NF_MLD_REPORTv2TYPE_CHANGEEXCLUDE => 4;
use constant NF_MLD_REPORTv2TYPE_ALLOWNEW      => 5;
use constant NF_MLD_REPORTv2TYPE_BLOCKOLD      => 6;

our @AS = qw(
   type
   auxDataLen
   numSources
   multicastAddress
   auxData
);
our @AA = qw(
   sourceAddress
);
__PACKAGE__->cgBuildIndices;
__PACKAGE__->cgBuildAccessorsScalar(\@AS);
__PACKAGE__->cgBuildAccessorsArray(\@AA);

#no strict 'vars';

sub new {
   shift->SUPER::new(
      type             => NF_MLD_REPORTv2TYPE_MODEINCLUDE,
      auxDataLen       => 0,
      numSources       => 0,
      multicastAddress => '::',
      sourceAddress    => [],
      auxData          => '',
      @_,
   );
}

sub getLength {
   my $self = shift;
   my $len = 20 + length($self->auxData);
   $len += 16 for $self->sourceAddress;
   return $len;
}

sub pack {
   my $self = shift;

   my $raw = $self->SUPER::pack('CCna16',
      $self->type,
      $self->auxDataLen,
      $self->numSources,
      inet6Aton($self->multicastAddress),
   ) or return;

   for ($self->sourceAddress) {
      $raw .= inet6Aton($_);
   }

   if ($self->auxData ne "") {
      $raw .= $self->SUPER::pack('a*',
         $self->auxData,
      ) or return;
   }

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

sub unpack {
   my $self = shift;

   my ($type, $auxDataLen, $numSources, $multicastAddress, $payload) =
      $self->SUPER::unpack('CCna16 a*', $self->raw)
         or return;

   $self->type($type);
   $self->auxDataLen($auxDataLen);
   $self->numSources($numSources);
   $self->multicastAddress(inet6Ntoa($multicastAddress));

   my @sourceAddress = ();
   for my $num (0..$numSources-1) {
      if (defined($payload) && (length($payload) >= 16)) {
         my $addr = unpack 'a16', $payload;
         push @sourceAddress, inet6Ntoa($addr);
         $payload = substr $payload, 16;
      }
   }
   $self->sourceAddress(\@sourceAddress);
   $self->auxData("");

   # auxDataLen is length in 32-bit words so extra math (/4, *4)
   if (($self->auxDataLen > 0) && defined($payload) && ((length($payload)/4) >= $self->auxDataLen)) {
      my $auxData = substr $payload, 0, $self->auxDataLen*4;
      $self->auxData($auxData);
      $payload = substr $payload, $self->auxDataLen*4
   }

   $self->payload($payload);

   return $self;
}

sub encapsulate {
   my $self = shift;

   return $self->nextLayer if $self->nextLayer;

   if ($self->payload) {
      return 'ICMPv6::MLD::Report::Record';
   }

   NF_LAYER_NONE;
}

sub computeLengths {
   my $self = shift;

   # Calculate auxDataLen if auxData and auxDataLen = 0
   if (($self->auxData ne "") && ($self->auxDataLen == 0)) {
      # auxDataLen is number of 32-bit words
      if (my $mod = (length($self->auxData) * 8) % 32) {
          my $pad = (32 - $mod)/8;
          my $auxData = $self->auxData;
          # Add padding if required to make 32-bit flush
          $auxData .= "\0"x$pad;
          $self->auxData($auxData)
      }
      $self->auxDataLen(length($self->auxData)/4)
   }

   # Calculate numSources from sourceAddress array items
   if (scalar($self->sourceAddress) && ($self->numSources == 0)) {
      $self->numSources(scalar($self->sourceAddress))
   }

   return 1;
}

sub print {
   my $self = shift;

   my $l = $self->layer;
   my $buf = sprintf
      "$l: type:%d  auxDataLen:%d  numSources:%d\n".