From afa9823c9a038d434a0bad1b3f5208b49bd2614c Mon Sep 17 00:00:00 2001
From: Mark Nipper <nipsy@bitgnome.net>
Date: Mon, 14 Oct 2024 22:30:38 -0700
Subject: Handle nftables reload better

---
 hosts/darkstar/default.nix | 38 ++++++++++++++++++++------------------
 1 file changed, 20 insertions(+), 18 deletions(-)

(limited to 'hosts/darkstar')

diff --git a/hosts/darkstar/default.nix b/hosts/darkstar/default.nix
index 0368377..7eb3c62 100644
--- a/hosts/darkstar/default.nix
+++ b/hosts/darkstar/default.nix
@@ -102,9 +102,7 @@
 
   system.stateVersion = "23.11";
 
-  systemd.services."nftables-extra" = {
-    description = "nftables extra firewall rules";
-    script = ''
+  systemd.services."nftables-extra" = let rules_script = ''
       ${pkgs.nftables}/bin/nft -a list chain inet nixos-fw input | ${pkgs.gnugrep}/bin/grep @anveo | ${pkgs.gnugrep}/bin/grep -Eo 'handle [[:digit:]]+$' | ${pkgs.gnused}/bin/sed -e 's/^handle //' | while read handle; do ${pkgs.nftables}/bin/nft delete rule inet nixos-fw input handle ''${handle}; done
       if ${pkgs.nftables}/bin/nft list set inet nixos-fw anveo 2>/dev/null; then ${pkgs.nftables}/bin/nft delete set inet nixos-fw anveo; fi
       if ${pkgs.nftables}/bin/nft list ct helpers table inet nixos-fw | ${pkgs.gnugrep}/bin/grep -qE '^[[:space:]]*ct helper sip-5060 {$'; then ${pkgs.nftables}/bin/nft delete ct helper inet nixos-fw sip-5060; fi
@@ -114,22 +112,26 @@
       ${pkgs.nftables}/bin/nft insert rule inet nixos-fw input 'iifname "vlan201" udp dport sip ip saddr @anveo accept'
       ${pkgs.nftables}/bin/nft -f ${config.sops.secrets."nftables/forward".path}
       ${pkgs.nftables}/bin/nft -f ${config.sops.secrets."nftables/ssh".path}
-    '';
-    serviceConfig = {
-      RemainAfterExit = true;
-      Type = "oneshot";
-    };
-    unitConfig = {
-      ConditionPathExists = [
-        config.sops.secrets."nftables/forward".path
-        config.sops.secrets."nftables/ssh".path
-      ];
-      ReloadPropagatedFrom = "nftables.service";
-    };
-    wantedBy = [ "multi-user.target" ];
-    after = [ "nftables.service" ];
-    partOf = [ "nftables.service" ];
+    ''; in {
+      description = "nftables extra firewall rules";
+      reload = rules_script;
+      script = rules_script;
+      serviceConfig = {
+        RemainAfterExit = true;
+        Type = "oneshot";
+      };
+      unitConfig = {
+        ConditionPathExists = [
+          config.sops.secrets."nftables/forward".path
+          config.sops.secrets."nftables/ssh".path
+        ];
+        ReloadPropagatedFrom = "nftables.service";
+      };
+      wantedBy = [ "multi-user.target" ];
+      after = [ "nftables.service" ];
+      partOf = [ "nftables.service" ];
   };
+
   systemd.paths."nftables-extra" = {
     pathConfig = {
       PathExists = [
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