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- syntax check before deploying configuration - remove static unnessary static uid/gid (configuration is opened as root) - add service hardening
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Original file line number | Diff line number | Diff line change |
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@@ -1,76 +1,68 @@ | ||
{ config, lib, pkgs, ... }: | ||
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let | ||
inherit (lib) mkEnableOption mkIf mkOption singleton types; | ||
inherit (pkgs) bird; | ||
cfg = config.services.bird; | ||
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configFile = pkgs.writeText "bird.conf" '' | ||
${cfg.config} | ||
''; | ||
in | ||
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{ | ||
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###### interface | ||
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options = { | ||
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services.bird = { | ||
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enable = mkEnableOption "BIRD Internet Routing Daemon"; | ||
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config = mkOption { | ||
type = types.string; | ||
description = '' | ||
BIRD Internet Routing Daemon configuration file. | ||
<link xlink:href='http://bird.network.cz/'/> | ||
inherit (lib) mkEnableOption mkIf mkOption types; | ||
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generic = variant: | ||
let | ||
cfg = config.services.${variant}; | ||
pkg = pkgs.${variant}; | ||
birdc = if variant == "bird6" then "birdc6" else "birdc"; | ||
configFile = pkgs.stdenv.mkDerivation { | ||
name = "${variant}.conf"; | ||
text = cfg.config; | ||
preferLocalBuild = true; | ||
buildCommand = '' | ||
echo -n "$text" > $out | ||
${pkg}/bin/${variant} -d -p -c $out | ||
''; | ||
}; | ||
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user = mkOption { | ||
type = types.string; | ||
default = "bird"; | ||
description = '' | ||
BIRD Internet Routing Daemon user. | ||
''; | ||
in { | ||
###### interface | ||
options = { | ||
services.${variant} = { | ||
enable = mkEnableOption "BIRD Internet Routing Daemon"; | ||
config = mkOption { | ||
type = types.lines; | ||
description = '' | ||
BIRD Internet Routing Daemon configuration file. | ||
<link xlink:href='http://bird.network.cz/'/> | ||
''; | ||
}; | ||
}; | ||
}; | ||
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group = mkOption { | ||
type = types.string; | ||
default = "bird"; | ||
description = '' | ||
BIRD Internet Routing Daemon group. | ||
''; | ||
###### implementation | ||
config = mkIf cfg.enable { | ||
systemd.services.${variant} = { | ||
description = "BIRD Internet Routing Daemon"; | ||
wantedBy = [ "multi-user.target" ]; | ||
serviceConfig = { | ||
Type = "forking"; | ||
Restart = "on-failure"; | ||
ExecStart = "${pkg}/bin/${variant} -c ${configFile} -u ${variant} -g ${variant}"; | ||
ExecReload = "${pkg}/bin/${birdc} configure"; | ||
ExecStop = "${pkg}/bin/${birdc} down"; | ||
CapabilityBoundingSet = [ "CAP_CHOWN" "CAP_FOWNER" "CAP_DAC_OVERRIDE" "CAP_SETUID" "CAP_SETGID" | ||
# see bird/sysdep/linux/syspriv.h | ||
"CAP_NET_BIND_SERVICE" "CAP_NET_BROADCAST" "CAP_NET_ADMIN" "CAP_NET_RAW" ]; | ||
ProtectSystem = "full"; | ||
ProtectHome = "yes"; | ||
SystemCallFilter="~@cpu-emulation @debug @keyring @module @mount @obsolete @raw-io"; | ||
MemoryDenyWriteExecute = "yes"; | ||
}; | ||
}; | ||
users = { | ||
extraUsers.${variant} = { | ||
description = "BIRD Internet Routing Daemon user"; | ||
group = "${variant}"; | ||
}; | ||
extraGroups.${variant} = {}; | ||
}; | ||
}; | ||
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}; | ||
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}; | ||
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###### implementation | ||
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config = mkIf cfg.enable { | ||
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users.extraUsers = singleton { | ||
name = cfg.user; | ||
description = "BIRD Internet Routing Daemon user"; | ||
uid = config.ids.uids.bird; | ||
group = cfg.group; | ||
}; | ||
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users.extraGroups = singleton { | ||
name = cfg.group; | ||
gid = config.ids.gids.bird; | ||
}; | ||
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systemd.services.bird = { | ||
description = "BIRD Internet Routing Daemon"; | ||
wantedBy = [ "multi-user.target" ]; | ||
serviceConfig = { | ||
ExecStart = "${bird}/bin/bird -d -c ${configFile} -s /var/run/bird.ctl -u ${cfg.user} -g ${cfg.group}"; | ||
}; | ||
}; | ||
}; | ||
inherit (config.services) bird bird6; | ||
in { | ||
imports = [(generic "bird") (generic "bird6")]; | ||
} |