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# File 'manifests/rule.pp', line 55
define ferm::rule (
String[1] $chain,
Ferm::Protocols $proto,
Ferm::Actions $action,
String $comment = $name,
Optional[Ferm::Port] $dport = undef,
Optional[Ferm::Port] $sport = undef,
Optional[Variant[Array, String[1]]] $saddr = undef,
Optional[Variant[Array, String[1]]] $daddr = undef,
Optional[String[1]] $proto_options = undef,
Optional[String[1]] $interface = undef,
Enum['absent','present'] $ensure = 'present',
Ferm::Tables $table = 'filter',
Optional[Ferm::Negation] $negate = undef,
) {
if $action in ['RETURN', 'ACCEPT', 'DROP', 'REJECT', 'NOTRACK', 'LOG', 'MARK', 'DNAT', 'SNAT', 'MASQUERADE', 'REDIRECT'] {
$action_real = $action
} else {
# assume the action contains a target chain, so prefix it with the "jump" statement
$action_real = "jump ${action}"
# make sure the target chain is created before we try to add rules to it
Ferm::Chain <| chain == $action and table == $table |> -> Ferm::Rule[$name]
}
$proto_real = $proto ? {
Array => "proto (${join($proto, ' ')})",
String => "proto ${proto}",
Integer => "proto ${proto}",
}
# convert String to Array to equally handle both cases
$_negate = [$negate].flatten.unique
$negate_saddr = 'saddr' in $_negate ? { true => '!', false => '', }
$negate_daddr = 'daddr' in $_negate ? { true => '!', false => '', }
$negate_sport = 'sport' in $_negate ? { true => '!', false => '', }
$negate_dport = 'dport' in $_negate ? { true => '!', false => '', }
if $dport =~ Array {
$dports = join($dport, ' ')
$dport_real = "mod multiport destination-ports ${negate_dport}(${dports})"
} elsif $dport =~ Integer {
$dport_real = "dport ${negate_dport}${dport}"
} elsif String($dport) =~ /^\d*:\d+$/ {
$portrange = split($dport, /:/)
$lower = $portrange[0] ? {
'' => 0,
default => Integer($portrange[0]),
}
$upper = Integer($portrange[1])
assert_type(Tuple[Stdlib::Port, Stdlib::Port], [$lower, $upper]) |$expected, $actual| {
fail("The data type should be \'${expected}\', not \'${actual}\'. The data is [${lower}, ${upper}])}.")
''
}
if $lower > $upper {
fail("Lower port number of the port range is larger than upper. ${lower}:${upper}")
}
$dport_real = "dport ${negate_dport}${lower}:${upper}"
} elsif String($dport) == '' {
$dport_real = ''
} else {
fail("invalid destination-port: ${negate_dport}${dport}")
}
if $sport =~ Array {
$sports = join($sport, ' ')
$sport_real = "mod multiport source-ports ${negate_sport}(${sports})"
} elsif $sport =~ Integer {
$sport_real = "sport ${negate_sport}${sport}"
} elsif String($sport) =~ /^\d*:\d+$/ {
$portrange = split($sport, /:/)
$lower = $portrange[0] ? {
'' => 0,
default => Integer($portrange[0]),
}
$upper = Integer($portrange[1])
assert_type(Tuple[Stdlib::Port, Stdlib::Port], [$lower, $upper]) |$expected, $actual| {
fail("The data type should be \'${expected}\', not \'${actual}\'. The data is [${lower}, ${upper}])}.")
''
}
if $lower > $upper {
fail("Lower port number of the port range is larger than upper. ${lower}:${upper}")
}
$sport_real = "sport ${negate_sport}${lower}:${upper}"
} elsif String($sport) == '' {
$sport_real = ''
} else {
fail("invalid source-port: ${sport}")
}
if $saddr =~ Array {
assert_type(Array[Stdlib::IP::Address], flatten($saddr)) |$expected, $actual| {
fail( "The data type should be \'${expected}\', not \'${actual}\'. The data is ${flatten($saddr)}." )
''
}
}
$saddr_real = $saddr ? {
undef => '',
Array => "saddr ${negate_saddr}@ipfilter((${join(flatten($saddr).unique, ' ')}))",
String => "saddr ${negate_saddr}@ipfilter((${saddr}))",
default => '',
}
if $daddr =~ Array {
assert_type(Array[Stdlib::IP::Address], flatten($daddr)) |$expected, $actual| {
fail( "The data type should be \'${expected}\', not \'${actual}\'. The data is ${flatten($daddr)}." )
''
}
}
$daddr_real = $daddr ? {
undef => '',
Array => "daddr ${negate_daddr}@ipfilter((${join(flatten($daddr).unique, ' ')}))",
String => "daddr ${negate_daddr}@ipfilter((${daddr}))",
default => '',
}
$proto_options_real = $proto_options ? {
undef => '',
default => $proto_options
}
$comment_real = "mod comment comment '${comment}'"
# prevent unmanaged files due to new naming schema
# keep the default "filter" chains in the original location
# only prefix chains in other tables with the table name
if $table == 'filter' and $chain in ['INPUT', 'FORWARD', 'OUTPUT'] {
$filename = "${ferm::configdirectory}/chains/${chain}.conf"
} else {
$filename = "${ferm::configdirectory}/chains/${table}-${chain}.conf"
}
$rule = squeeze("${comment_real} ${proto_real} ${proto_options_real} ${dport_real} ${sport_real} ${daddr_real} ${saddr_real} ${action_real};", ' ')
if $ensure == 'present' {
if $interface {
unless defined(Concat::Fragment["${chain}-${interface}-aaa"]) {
concat::fragment { "${chain}-${interface}-aaa":
target => $filename,
content => "interface ${interface} {\n",
order => $interface,
}
}
concat::fragment { "${chain}-${interface}-${name}":
target => $filename,
content => " ${rule}\n",
order => $interface,
}
unless defined(Concat::Fragment["${chain}-${interface}-zzz"]) {
concat::fragment { "${chain}-${interface}-zzz":
target => $filename,
content => "}\n",
order => $interface,
}
}
} else {
concat::fragment { "${chain}-${name}":
target => $filename,
content => "${rule}\n",
}
}
}
}
|