From eb39234ba8375d7274d70af678175ffe88109cb3 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Thu, 2 Feb 2023 16:29:23 +0100
Subject: tv wiregrill: init

---
 tv/2configs/wiregrill.nix | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 tv/2configs/wiregrill.nix

diff --git a/tv/2configs/wiregrill.nix b/tv/2configs/wiregrill.nix
new file mode 100644
index 000000000..d28a1ec29
--- /dev/null
+++ b/tv/2configs/wiregrill.nix
@@ -0,0 +1,37 @@
+with import ./lib;
+{ config, pkgs, ... }: let
+  cfg = {
+    enable = cfg.net != null;
+    net = config.krebs.build.host.nets.wiregrill or null;
+  };
+  toCidrNotation = ip: "${ip.addr}/${toString ip.prefixLength}";
+in
+  mkIf cfg.enable {
+    networking.wireguard.interfaces.wiregrill = {
+      ips =
+        optional (cfg.net.ip4 != null) cfg.net.ip4.addr ++
+        optional (cfg.net.ip6 != null) cfg.net.ip6.addr;
+      listenPort = 51820;
+      privateKeyFile = (toString <secrets>) + "/wiregrill.key";
+      allowedIPsAsRoutes = true;
+      peers = mapAttrsToList
+        (_: host: {
+          allowedIPs = host.nets.wiregrill.wireguard.subnets;
+          endpoint =
+            mkIf (host.nets.wiregrill.via != null) (host.nets.wiregrill.via.ip4.addr + ":${toString host.nets.wiregrill.wireguard.port}");
+          persistentKeepalive = mkIf (host.nets.wiregrill.via != null) 61;
+          publicKey =
+            replaceStrings ["\n"] [""] host.nets.wiregrill.wireguard.pubkey;
+        })
+        (filterAttrs (_: h: hasAttr "wiregrill" h.nets) config.krebs.hosts);
+    };
+    systemd.network.networks.wiregrill = {
+      matchConfig.Name = "wiregrill";
+      address =
+        optional (!isNull cfg.net.ip4) (toCidrNotation cfg.net.ip4) ++
+        optional (!isNull cfg.net.ip6) (toCidrNotation cfg.net.ip6);
+    };
+    tv.iptables.extra.filter.INPUT = [
+      "-p udp --dport ${toString cfg.net.wireguard.port} -j ACCEPT"
+    ];
+  }
-- 
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