Add simple packet metrics

firewall/interception/interception_linux.go

@@ -1,8 +1,10 @@
 package interception
 
+import "github.com/safing/portmaster/network/packet"
+
 // start starts the interception.
-func start() error {
-	return StartNfqueueInterception()
+func start(ch chan packet.Packet) error {
+	return StartNfqueueInterception(ch)
 }
 
 // stop starts the interception.