Puppet::Type.type(:firewall).provide :ip6tables, :parent => :iptables, :source => :ip6tables do
  @doc = "Ip6tables type provider"

  has_feature :iptables
  has_feature :connection_limiting
  has_feature :hop_limiting
  has_feature :rate_limiting
  has_feature :recent_limiting
  has_feature :snat
  has_feature :dnat
  has_feature :interface_match
  has_feature :icmp_match
  has_feature :owner
  has_feature :state_match
  has_feature :reject_type
  has_feature :log_level
  has_feature :log_prefix
  has_feature :log_uid
  has_feature :mark
  has_feature :mss
  has_feature :tcp_flags
  has_feature :pkttype
  has_feature :ishasmorefrags
  has_feature :islastfrag
  has_feature :isfirstfrag
  has_feature :socket
  has_feature :address_type
  has_feature :iprange
  has_feature :ipsec_dir
  has_feature :ipsec_policy
  has_feature :mask
  has_feature :ipset
  has_feature :length
  has_feature :string_matching

  optional_commands({
    :ip6tables      => 'ip6tables',
    :ip6tables_save => 'ip6tables-save',
  })

  confine :kernel => :linux

  ip6tables_version = Facter.value('ip6tables_version')
  if (ip6tables_version and Puppet::Util::Package.versioncmp(ip6tables_version, '1.4.1') < 0)
    mark_flag = '--set-mark'
  else
    mark_flag = '--set-xmark'
  end


  def initialize(*args)
    ip6tables_version = Facter.value('ip6tables_version')
    if ip6tables_version and ip6tables_version.match /1\.3\.\d/
      raise ArgumentError, 'The ip6tables provider is not supported on version 1.3 of iptables'
    else
      super
    end
  end

  def self.iptables(*args)
    ip6tables(*args)
  end

  def self.iptables_save(*args)
    ip6tables_save(*args)
  end

  @protocol = "IPv6"

  @resource_map = {
    :burst              => "--limit-burst",
    :checksum_fill      => "--checksum-fill",
    :clamp_mss_to_pmtu  => "--clamp-mss-to-pmtu",
    :connlimit_above    => "-m connlimit --connlimit-above",
    :connlimit_mask     => "--connlimit-mask",
    :connmark           => "-m connmark --mark",
    :ctstate            => "-m conntrack --ctstate",
    :destination        => "-d",
    :dport              => ["-m multiport --dports", "--dport"],
    :dst_range          => '--dst-range',
    :dst_type           => "--dst-type",
    :gateway            => "--gateway",
    :gid                => "--gid-owner",
    :hop_limit          => "-m hl --hl-eq",
    :icmp               => "-m icmp6 --icmpv6-type",
    :iniface            => "-i",
    :ipsec_dir          => "-m policy --dir",
    :ipsec_policy       => "--pol",
    :ipset              => "-m set --match-set",
    :isfirstfrag        => "-m frag --fragid 0 --fragfirst",
    :ishasmorefrags     => "-m frag --fragid 0 --fragmore",
    :islastfrag         => "-m frag --fragid 0 --fraglast",
    :jump               => "-j",
    :length             => "-m length --length",
    :limit              => "-m limit --limit",
    :log_level          => "--log-level",
    :log_prefix         => "--log-prefix",
    :log_uid            => "--log-uid",
    :mask               => "--mask",
    :match_mark         => "-m mark --mark",
    :name               => "-m comment --comment",
    :mac_source         => ["-m mac --mac-source", "--mac-source"],
    :mss                => "-m tcpmss --mss",
    :outiface           => "-o",
    :pkttype            => "-m pkttype --pkt-type",
    :port               => '-m multiport --ports',
    :proto              => "-p",
    :rdest              => "--rdest",
    :reap               => "--reap",
    :recent             => "-m recent",
    :reject             => "--reject-with",
    :rhitcount          => "--hitcount",
    :rname              => "--name",
    :rseconds           => "--seconds",
    :rsource            => "--rsource",
    :rttl               => "--rttl",
    :set_dscp           => '--set-dscp',
    :set_dscp_class     => '--set-dscp-class',
    :set_mark           => mark_flag,
    :set_mss            => '--set-mss',
    :socket             => "-m socket",
    :source             => "-s",
    :sport              => ["-m multiport --sports", "--sport"],
    :src_range          => '--src-range',
    :src_type           => "--src-type",
    :stat_every         => '--every',
    :stat_mode          => "-m statistic --mode",
    :stat_packet        => '--packet',
    :stat_probability   => '--probability',
    :state              => "-m state --state",
    :string             => "-m string --string",
    :string_algo        => "--algo",
    :string_from        => "--from",
    :string_to          => "--to",
    :table              => "-t",
    :tcp_flags          => "-m tcp --tcp-flags",
    :todest             => "--to-destination",
    :toports            => "--to-ports",
    :tosource           => "--to-source",
    :uid                => "--uid-owner",
    :physdev_in         => "--physdev-in",
    :physdev_out        => "--physdev-out",
    :physdev_is_bridged => "--physdev-is-bridged",
    :date_start         => "--datestart",
    :date_stop          => "--datestop",
    :time_start         => "--timestart",
    :time_stop          => "--timestop",
    :month_days         => "--monthdays",
    :week_days          => "--weekdays",
    :time_contiguous    => "--contiguous",
    :kernel_timezone    => "--kerneltz",
  }

  # These are known booleans that do not take a value, but we want to munge
  # to true if they exist.
  @known_booleans = [
    :checksum_fill,
    :clamp_mss_to_pmtu,
    :ishasmorefrags,
    :islastfrag,
    :isfirstfrag,
    :log_uid,
    :rsource,
    :rdest,
    :reap,
    :rttl,
    :socket,
    :physdev_is_bridged,
    :time_contiguous,
    :kernel_timezone,
  ]

  # Properties that use "-m <ipt module name>" (with the potential to have multiple 
  # arguments against the same IPT module) must be in this hash. The keys in this
  # hash are the IPT module names, with the values being an array of the respective
  # supported arguments for this IPT module.
  #
  # ** IPT Module arguments must be in order as they would appear in iptables-save **
  #
  # Exceptions:
  #             => multiport: (For some reason, the multiport arguments can't be)
  #                specified within the same "-m multiport", but works in seperate
  #                ones.
  #
  @module_to_argument_mapping = {
    :physdev   => [:physdev_in, :physdev_out, :physdev_is_bridged],
    :addrtype  => [:src_type, :dst_type],
    :iprange   => [:src_range, :dst_range],
    :owner     => [:uid, :gid],
    :time      => [:time_start, :time_stop, :month_days, :week_days, :date_start, :date_stop, :time_contiguous, :kernel_timezone]
  }

  # Create property methods dynamically
  (@resource_map.keys << :chain << :table << :action).each do |property|
    if @known_booleans.include?(property) then
      # The boolean properties default to '' which should be read as false
      define_method "#{property}" do
        @property_hash[property] = :false if @property_hash[property] == nil
        @property_hash[property.to_sym]
      end
    else
      define_method "#{property}" do
        @property_hash[property.to_sym]
      end
    end

    if property == :chain
      define_method "#{property}=" do |value|
        if @property_hash[:chain] != value
          raise ArgumentError, "Modifying the chain for existing rules is not supported."
        end
      end
    else
      define_method "#{property}=" do |value|
        @property_hash[:needs_change] = true
      end
    end
  end

  # This is the order of resources as they appear in iptables-save output,
  # we need it to properly parse and apply rules, if the order of resource
  # changes between puppet runs, the changed rules will be re-applied again.
  # This order can be determined by going through iptables source code or just tweaking and trying manually
  # (Note: on my CentOS 6.4 ip6tables-save returns -m frag on the place
  # I put it when calling the command. So compability with manual changes
  # not provided with current parser [georg.koester])
  @resource_list = [:table, :source, :destination, :iniface, :outiface, :physdev_in,
    :physdev_out, :physdev_is_bridged, :proto, :ishasmorefrags, :islastfrag, :isfirstfrag, :src_range, :dst_range,
    :tcp_flags, :uid, :gid, :mac_source, :sport, :dport, :port, :src_type,
    :dst_type, :socket, :pkttype, :name, :ipsec_dir, :ipsec_policy, :state,
    :ctstate, :icmp, :hop_limit, :limit, :burst, :length, :recent, :rseconds, :reap,
    :rhitcount, :rttl, :rname, :mask, :rsource, :rdest, :ipset, :string, :string_algo,
    :string_from, :string_to, :jump, :clamp_mss_to_pmtu, :gateway, :todest,
    :tosource, :toports, :checksum_fill, :log_level, :log_prefix, :log_uid, :reject, :set_mss, :set_dscp, :set_dscp_class, :mss,
    :set_mark, :match_mark, :connlimit_above, :connlimit_mask, :connmark, :time_start, :time_stop, :month_days, :week_days, :date_start, :date_stop, :time_contiguous, :kernel_timezone]

end
