From ee2c718c9728d8aed9a014a57223fbd5ba8df5e9 Mon Sep 17 00:00:00 2001
From: "quentin@aristote.fr" <quentin@aristote.fr>
Date: Wed, 17 Jul 2024 08:55:39 +0200
Subject: networking: replace dummy interface hack with ifplugd service

---
 config/networking/services/default.nix |  7 ++-----
 config/networking/services/ifplugd.nix | 37 ++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 5 deletions(-)
 create mode 100644 config/networking/services/ifplugd.nix

(limited to 'config/networking/services')

diff --git a/config/networking/services/default.nix b/config/networking/services/default.nix
index 0ec9540..623a1c7 100644
--- a/config/networking/services/default.nix
+++ b/config/networking/services/default.nix
@@ -1,6 +1,3 @@
-{ ... }:
-
-{
-  imports =
-    [ ./ap.nix ./dhcp.nix ./dns.nix ./firewall ./igmpproxy.nix ];
+{...}: {
+  imports = [./ap.nix ./dhcp.nix ./dns.nix ./firewall ./ifplugd.nix ./igmpproxy.nix];
 }
diff --git a/config/networking/services/ifplugd.nix b/config/networking/services/ifplugd.nix
new file mode 100644
index 0000000..4933b97
--- /dev/null
+++ b/config/networking/services/ifplugd.nix
@@ -0,0 +1,37 @@
+{
+  config,
+  pkgs,
+  ...
+}: let
+  iface = config.personal.networking.networks.eth0.device;
+  dhcpService = "kea-dhcp4-server.service";
+  action = pkgs.writeShellApplication {
+    name = "ifplugd-enp3s0.action";
+    runtimeInputs = [pkgs.systemd];
+    text = ''
+      INTERFACE="$1"
+      EVENT="$2"
+
+      if [[ "$INTERFACE" == '${iface}' && "$EVENT" == up ]]
+      then
+        echo ${iface} went up, restarting ${dhcpService}...
+        systemctl restart ${dhcpService}
+      fi
+    '';
+  };
+in {
+  systemd.services."ifplugd-${iface}" = {
+    enable = true;
+
+    description = "Monitor status of interface ${iface}";
+    after = ["sys-subsystem-net-devices-${iface}.device" dhcpService];
+    wantedBy = [dhcpService];
+
+    script = ''
+      #       iface       no-daemon no-auto no-shutdown delay-up run
+      ifplugd -i ${iface} -n        -a      -q          -u 5     -r \
+              ${action}/bin/ifplugd-enp3s0.action
+    '';
+    path = [pkgs.busybox];
+  };
+}
-- 
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