initial commit

internal/server/network/backend_networkd_signals.go

@@ -0,0 +1,68 @@
+package network
+
+import (
+	"fmt"
+
+	"github.com/AvengeMedia/danklinux/internal/log"
+	"github.com/godbus/dbus/v5"
+)
+
+func (b *SystemdNetworkdBackend) StartMonitoring(onStateChange func()) error {
+	b.onStateChange = onStateChange
+
+	b.signals = make(chan *dbus.Signal, 64)
+	b.conn.Signal(b.signals)
+
+	matchRules := []string{
+		"type='signal',interface='org.freedesktop.DBus.Properties',member='PropertiesChanged',path_namespace='/org/freedesktop/network1'",
+		"type='signal',interface='org.freedesktop.network1.Manager'",
+	}
+
+	for _, rule := range matchRules {
+		if err := b.conn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0, rule).Err; err != nil {
+			return fmt.Errorf("add match %q: %w", rule, err)
+		}
+	}
+
+	b.sigWG.Add(1)
+	go b.signalLoop()
+
+	return nil
+}
+
+func (b *SystemdNetworkdBackend) StopMonitoring() {
+	b.sigWG.Wait()
+}
+
+func (b *SystemdNetworkdBackend) signalLoop() {
+	defer b.sigWG.Done()
+
+	for {
+		select {
+		case <-b.stopChan:
+			return
+		case sig := <-b.signals:
+			if sig == nil {
+				continue
+			}
+
+			if sig.Name == "org.freedesktop.DBus.Properties.PropertiesChanged" {
+				if len(sig.Body) < 2 {
+					continue
+				}
+				iface, ok := sig.Body[0].(string)
+				if !ok || iface != networkdLinkIface {
+					continue
+				}
+
+				b.enumerateLinks()
+				if err := b.updateState(); err != nil {
+					log.Warnf("networkd state update failed: %v", err)
+				}
+				if b.onStateChange != nil {
+					b.onStateChange()
+				}
+			}
+		}
+	}
+}