diff options
Diffstat (limited to '3modules/lass/iptables.nix')
-rw-r--r-- | 3modules/lass/iptables.nix | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/3modules/lass/iptables.nix b/3modules/lass/iptables.nix deleted file mode 100644 index c97b9f7..0000000 --- a/3modules/lass/iptables.nix +++ /dev/null @@ -1,187 +0,0 @@ -arg@{ config, lib, pkgs, ... }: - -let - inherit (pkgs) writeScript writeText; - - inherit (lib) - concatMapStringsSep - concatStringsSep - attrNames - unique - fold - any - attrValues - catAttrs - filter - flatten - length - hasAttr - mkEnableOption - mkOption - mkIf - types - sort; - - elemIsIn = a: as: - any (x: x == a) as; - - cfg = config.lass.iptables; - - out = { - options.lass.iptables = api; - config = mkIf cfg.enable imp; - }; - - api = { - enable = mkEnableOption "iptables"; - - #tables.filter.INPUT = { - # policy = "DROP"; - # rules = [ - # { predicate = "-i retiolum"; target = "ACCEPT"; priority = -10; } - # ]; - #}; - #new api - tables = mkOption { - type = with types; attrsOf (attrsOf (submodule ({ - options = { - policy = mkOption { - type = str; - default = "-"; - }; - rules = mkOption { - type = nullOr (listOf (submodule ({ - options = { - predicate = mkOption { - type = str; - }; - target = mkOption { - type = str; - }; - precedence = mkOption { - type = int; - default = 0; - }; - }; - }))); - default = null; - }; - }; - }))); - }; - }; - - imp = { - networking.firewall.enable = false; - - systemd.services.lass-iptables = { - description = "lass-iptables"; - wantedBy = [ "network-pre.target" ]; - before = [ "network-pre.target" ]; - after = [ "systemd-modules-load.service" ]; - - path = with pkgs; [ - iptables - ]; - - restartIfChanged = true; - - serviceConfig = { - Type = "simple"; - RemainAfterExit = true; - Restart = "always"; - ExecStart = "@${startScript} lass-iptables_start"; - }; - }; - }; - - #buildTable :: iptablesVersion -> iptablesAttrSet` -> str - #todo: differentiate by iptables-version - buildTables = v: ts: - let - - declareChain = t: cn: - #TODO: find out what to do whit these count numbers - ":${cn} ${t."${cn}".policy} [0:0]"; - - buildChain = tn: cn: - let - sortedRules = sort (a: b: a.precedence < b.precedence) ts."${tn}"."${cn}".rules; - - in - #TODO: double check should be unneccessary, refactor! - if (hasAttr "rules" ts."${tn}"."${cn}") then - if (ts."${tn}"."${cn}".rules == null) then - "" - else - concatMapStringsSep "\n" (rule: "\n-A ${cn} ${rule}") ([] - ++ map (buildRule tn cn) sortedRules - ) - else - "" - ; - - - buildRule = tn: cn: rule: - #target validation test: - assert (elemIsIn rule.target ([ "ACCEPT" "REJECT" "DROP" "QUEUE" "LOG" "RETURN" ] ++ (attrNames ts."${tn}"))); - - #predicate validation test: - #maybe use iptables-test - #TODO: howto exit with evaluation error by shellscript? - #apperantly not possible from nix because evalatution wouldn't be deterministic. - "${rule.predicate} -j ${rule.target}"; - - buildTable = tn: - "*${tn}\n" + - concatStringsSep "\n" ([] - ++ map (declareChain ts."${tn}") (attrNames ts."${tn}") - ) + - #this looks dirty, find a better way to do this (maybe optionalString) - concatStringsSep "" ([] - ++ map (buildChain tn) (attrNames ts."${tn}") - ) + - "\nCOMMIT"; - in - concatStringsSep "\n" ([] - ++ map buildTable (attrNames ts) - ); - -#===== - - rules4 = iptables-version: - let - #TODO: find out good defaults. - tables-defaults = { - nat.PREROUTING.policy = "ACCEPT"; - nat.INPUT.policy = "ACCEPT"; - nat.OUTPUT.policy = "ACCEPT"; - nat.POSTROUTING.policy = "ACCEPT"; - filter.INPUT.policy = "ACCEPT"; - filter.FORWARD.policy = "ACCEPT"; - filter.OUTPUT.policy = "ACCEPT"; - - #if someone specifies any other rules on this chain, the default rules get lost. - #is this wanted beahiviour or a bug? - #TODO: implement abstraction of rules - filter.INPUT.rules = [ - { predicate = "-m conntrack --ctstate RELATED,ESTABLISHED"; target = "ACCEPT"; } - ]; - }; - tables = tables-defaults // cfg.tables; - - in - writeText "lass-iptables-rules${toString iptables-version}" '' - ${buildTables iptables-version tables} - ''; - - startScript = writeScript "lass-iptables_start" '' - #! /bin/sh - set -euf - iptables-restore < ${rules4 4} - ip6tables-restore < ${rules4 6} - ''; - -in -out - |