puppet nftables

# This class is meant to be useful to ease the migration from the Firewall type

# for simple use cases. The coverage of all the casuistry is rather low so for

# any case not covered by nftables::simplerule please just use nftables::rule.

define nftables::simplerule(

  Enum['present','absent']

    $ensure = 'present',

  Pattern[/^[-a-zA-Z0-9_]+$/]

    $rulename = $title,

  Pattern[/^\d\d$/]

    $order = '50',

  String

    $chain  = 'default_in',

  Optional[String]

    $table = 'inet-filter',

  Enum['accept', 'drop']

    $action = 'accept',

  Optional[String]

    $comment = undef,

  Optional[Variant[Array[Stdlib::Port, 1], Stdlib::Port, Pattern[/\d+-\d+/]]]

    $dport  = undef,

  Optional[Enum['tcp', 'tcp4', 'tcp6', 'udp', 'udp4', 'udp6']]

    $proto  = undef,

){

  if $dport and !$proto {

    fail('Specifying a transport protocol via $proto is mandatory when passing a port')

  }

  if $ensure == 'present' {

    nftables::rule{"${chain}-${rulename}":

      content => epp('nftables/simplerule.epp',

        {

          'action'  => $action,

          'comment' => $comment,

          'dport'   => $dport,

          'proto'   => $proto,

        }

      ),

      order   => $order,

      table   => $table,

    }

  }

}