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# defined resource which creates a single rule in a specific chain
# @param chain Configure the chain where we want to add the rule
# @param policy Configure what we want to do with the packet (drop, accept, log...)
# @param proto Which protocol do we want to match, typically UDP or TCP
# @param comment A comment that will be added to the ferm config and to ip{,6}tables
# @param dport The destination port, can be a range as string or a single port number as integer
# @param sport The source port, can be a range as string or a single port number as integer
# @param saddr The source address we want to match
# @param daddr The destination address we want to match
# @param proto_options Optional parameters that will be passed to the protocol (for example to match specific ICMP types)
# @param ensure Set the rule to present or absent
define ferm::rule (
Ferm::Chains $chain,
Ferm::Policies $policy,
Ferm::Protocols $proto,
String $comment = $name,
Optional[Variant[Integer,String]] $dport = undef,
Optional[Variant[Integer,String]] $sport = undef,
Optional[String] $saddr = undef,
Optional[String] $daddr = undef,
Optional[String[1]] $proto_options = undef,
Enum['absent','present'] $ensure = 'present',
){
$proto_real = "proto ${proto}"
$dport_real = $dport ? {
undef => '',
default => "dport ${dport}",
}
$sport_real = $sport ? {
undef => '',
default => "sport ${sport}",
}
$saddr_real = $saddr ? {
undef => '',
default => "saddr @ipfilter(${saddr})",
}
$daddr_real = $daddr ? {
undef => '',
default => "daddr @ipfilter(${daddr})"
}
$proto_options_real = $proto_options ? {
undef => '',
default => $proto_options
}
$comment_real = "mod comment comment '${comment}'"
$rule = squeeze("${comment_real} ${proto_real} ${proto_options_real} ${dport_real} ${sport_real} ${daddr_real} ${saddr_real} ${policy};", ' ')
if $ensure == 'present' {
concat::fragment{"${chain}-${name}":
target => "/etc/ferm.d/chains/${chain}.conf",
content => "${rule}\n",
}
}
}
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