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nixpkgs/nixos/modules/services/networking/shorewall6.nix

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{ config, lib, pkgs, ... }:
let
types = lib.types;
cfg = config.services.shorewall6;
in {
options = {
services.shorewall6 = {
enable = lib.mkOption {
type = types.bool;
default = false;
description = lib.mdDoc ''
Whether to enable Shorewall IPv6 Firewall.
::: {.warning}
Enabling this service WILL disable the existing NixOS
firewall! Default firewall rules provided by packages are not
considered at the moment.
:::
'';
};
package = lib.mkOption {
type = types.package;
default = pkgs.shorewall;
defaultText = lib.literalExpression "pkgs.shorewall";
description = lib.mdDoc "The shorewall package to use.";
};
configs = lib.mkOption {
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type = types.attrsOf types.lines;
default = {};
description = lib.mdDoc ''
This option defines the Shorewall configs.
The attribute name defines the name of the config,
and the attribute value defines the content of the config.
'';
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apply = lib.mapAttrs (name: text: pkgs.writeText "${name}" text);
};
};
};
config = lib.mkIf cfg.enable {
systemd.services.firewall.enable = false;
systemd.services.shorewall6 = {
description = "Shorewall IPv6 Firewall";
after = [ "ipset.target" ];
before = [ "network-pre.target" ];
wants = [ "network-pre.target" ];
wantedBy = [ "multi-user.target" ];
reloadIfChanged = true;
restartTriggers = lib.attrValues cfg.configs;
serviceConfig = {
Type = "oneshot";
RemainAfterExit = "yes";
ExecStart = "${cfg.package}/bin/shorewall6 start";
ExecReload = "${cfg.package}/bin/shorewall6 reload";
ExecStop = "${cfg.package}/bin/shorewall6 stop";
};
preStart = ''
install -D -d -m 750 /var/lib/shorewall6
install -D -d -m 755 /var/lock/subsys
touch /var/log/shorewall6.log
chown 750 /var/log/shorewall6.log
'';
};
environment = {
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etc = lib.mapAttrs' (name: conf: lib.nameValuePair "shorewall6/${name}" {source=conf;}) cfg.configs;
systemPackages = [ cfg.package ];
};
};
}