[Issue #6] - added config option to enable/disable icmp packets

config.go.example

@@ -8,6 +8,9 @@ const (
 	WifiSSID = "My Wifi Name"
 	WifiPass = "SecretWifiPassword"
 
+	// Networking settings
+	EnableICMP = true
+
 	MQTTHost = "192.168.1.50" // Must be an IP address; DNS resolution is not supported currently
 	MQTTPort = "1883"
 	MQTTUser = "" // Leave empty if not required

network.go

@@ -120,11 +120,15 @@ func InitNetwork(ssid, pass string) (*NetworkStack, error) {
 		MaxActiveTCPPorts: 2,
 		MTU:               uint16(framelen - ethernet.MaxOverheadSize),
 		HardwareAddress:   hwaddr,
+		ICMPQueueLimit:    4,
 	})
 	if err != nil {
 		return nil, fmt.Errorf("stack config reset: %w", err)
 	}
 
+	// Enable network pings if configured
+  _ = stack.EnableICMP(EnableICMP)
+
 	// Start background frame pump
 	ctx := context.Background()
 	go stackLoop(ctx, stack, adapter)