Create wifi backend abstraction

internal/app/app.go

@@ -51,8 +51,8 @@ func (a *App) Initialize(cfg *config.Config) error {
 	// Store config reference
 	a.Config = cfg
 
-	// Initialize WiFi D-Bus connection
-	if err := wifi.Initialize(cfg.WifiInterface); err != nil {
+	// Initialize WiFi backend
+	if err := wifi.Initialize(cfg.WifiInterface, cfg.WifiBackend); err != nil {
 		return err
 	}
 

internal/config/cli.go

@@ -8,6 +8,7 @@ import (
 func declareFlags(o *Config) {
 	flag.StringVar(&o.Bind, "bind", ":8081", "Bind port/socket")
 	flag.StringVar(&o.WifiInterface, "wifi-interface", "wlan0", "WiFi interface name")
+	flag.StringVar(&o.WifiBackend, "wifi-backend", "", "WiFi backend to use: 'iwd' or 'wpasupplicant' (required)")
 	flag.BoolVar(&o.UseARPDiscovery, "use-arp-discovery", true, "Use ARP table for device discovery instead of DHCP leases")
 	flag.StringVar(&o.DHCPLeasesPath, "dhcp-leases-path", "/var/lib/dhcp/dhcpd.leases", "Path to DHCP leases file")
 	flag.StringVar(&o.ARPTablePath, "arp-table-path", "/proc/net/arp", "Path to ARP table file")

internal/config/config.go

@@ -11,6 +11,7 @@ import (
 type Config struct {
 	Bind                 string
 	WifiInterface        string
+	WifiBackend          string
 	UseARPDiscovery      bool
 	DHCPLeasesPath       string
 	ARPTablePath         string
@@ -75,6 +76,11 @@ func ConsolidateConfig() (opts *Config, err error) {
 		return
 	}
 
+	// Validate configuration
+	if opts.WifiBackend != "iwd" && opts.WifiBackend != "wpasupplicant" {
+		log.Fatalf("wifi-backend must be set to 'iwd' or 'wpasupplicant' (got: '%s')", opts.WifiBackend)
+	}
+
 	return
 }
 

internal/wifi/backend/types.go

@@ -0,0 +1,56 @@
+package backend
+
+// WiFiBackend is the interface that must be implemented by all WiFi backends (iwd, wpa_supplicant, etc.)
+type WiFiBackend interface {
+	// Lifecycle Management
+	Initialize(interfaceName string) error
+	Close() error
+
+	// Network Discovery
+	ScanNetworks() error
+	GetOrderedNetworks() ([]BackendNetwork, error)
+	IsScanning() (bool, error)
+
+	// Connection Management
+	Connect(ssid, password string) error
+	Disconnect() error
+	GetConnectionState() (ConnectionState, error)
+	GetConnectedSSID() string
+
+	// Event Monitoring
+	StartEventMonitoring(callbacks EventCallbacks) error
+	StopEventMonitoring()
+}
+
+// BackendNetwork represents a WiFi network in a backend-agnostic format.
+// Both iwd and wpa_supplicant backends convert their native representations to this type.
+type BackendNetwork struct {
+	SSID         string
+	SignalDBm    int16  // Signal strength in dBm (-100 to 0)
+	SecurityType string // "open", "wep", "psk", "8021x"
+	BSSID        string // MAC address of the access point
+	Frequency    uint32 // Frequency in MHz (e.g., 2412 for channel 1, 5180 for channel 36)
+}
+
+// ConnectionState represents the WiFi connection state in a backend-agnostic way.
+type ConnectionState string
+
+const (
+	StateConnected     ConnectionState = "connected"
+	StateDisconnected  ConnectionState = "disconnected"
+	StateConnecting    ConnectionState = "connecting"
+	StateDisconnecting ConnectionState = "disconnecting"
+)
+
+// EventCallbacks defines callback functions that backends use to notify the wifi package of events.
+// This allows the wifi package to remain backend-agnostic while still receiving real-time updates.
+type EventCallbacks struct {
+	// OnStateChange is called when the connection state changes
+	OnStateChange func(state ConnectionState, ssid string)
+
+	// OnScanComplete is called when a network scan completes
+	OnScanComplete func()
+
+	// OnSignalUpdate is called when signal strength changes for the connected network
+	OnSignalUpdate func(ssid string, signalDBm int16)
+}

internal/wifi/factory.go

@@ -0,0 +1,21 @@
+package wifi
+
+import (
+	"fmt"
+
+	"github.com/nemunaire/repeater/internal/wifi/backend"
+	"github.com/nemunaire/repeater/internal/wifi/iwd"
+)
+
+// createBackend creates the appropriate WiFi backend based on the backend name
+func createBackend(backendName string) (backend.WiFiBackend, error) {
+	switch backendName {
+	case "iwd":
+		return iwd.NewIWDBackend(), nil
+	case "wpasupplicant":
+		// TODO: Implement wpa_supplicant backend
+		return nil, fmt.Errorf("wpa_supplicant backend not yet implemented")
+	default:
+		return nil, fmt.Errorf("invalid wifi backend: %s (must be 'iwd' or 'wpasupplicant')", backendName)
+	}
+}

internal/wifi/iwd/backend.go

@@ -0,0 +1,255 @@
+package iwd
+
+import (
+	"fmt"
+
+	"github.com/godbus/dbus/v5"
+	"github.com/nemunaire/repeater/internal/wifi/backend"
+)
+
+const (
+	AgentPath = "/com/github/nemunaire/repeater/agent"
+)
+
+// IWDBackend implements the WiFiBackend interface for iwd (Intel Wireless Daemon)
+type IWDBackend struct {
+	conn          *dbus.Conn
+	manager       *Manager
+	station       *Station
+	agent         *Agent
+	agentManager  *AgentManager
+	signalMonitor *SignalMonitor
+	interfaceName string
+	callbacks     backend.EventCallbacks
+}
+
+// NewIWDBackend creates a new IWD backend instance
+func NewIWDBackend() *IWDBackend {
+	return &IWDBackend{}
+}
+
+// Initialize initializes the iwd backend with the given interface name
+func (b *IWDBackend) Initialize(interfaceName string) error {
+	b.interfaceName = interfaceName
+	var err error
+
+	// Connect to D-Bus
+	b.conn, err = dbus.SystemBus()
+	if err != nil {
+		return fmt.Errorf("échec de connexion à D-Bus: %v", err)
+	}
+
+	// Find station for interface
+	b.manager = NewManager(b.conn)
+	b.station, err = b.manager.FindStation(interfaceName)
+	if err != nil {
+		return fmt.Errorf("impossible de trouver la station pour %s: %v", interfaceName, err)
+	}
+
+	// Create and register agent for credential callbacks
+	b.agent = NewAgent(b.conn, dbus.ObjectPath(AgentPath))
+	if err := b.agent.Export(); err != nil {
+		return fmt.Errorf("échec de l'export de l'agent: %v", err)
+	}
+
+	b.agentManager = NewAgentManager(b.conn)
+	if err := b.agentManager.RegisterAgent(dbus.ObjectPath(AgentPath)); err != nil {
+		b.agent.Unexport()
+		return fmt.Errorf("échec de l'enregistrement de l'agent: %v", err)
+	}
+
+	return nil
+}
+
+// Close closes the D-Bus connection and unregisters the agent
+func (b *IWDBackend) Close() error {
+	if b.agentManager != nil && b.agent != nil {
+		b.agentManager.UnregisterAgent(dbus.ObjectPath(AgentPath))
+		b.agent.Unexport()
+	}
+	if b.conn != nil {
+		b.conn.Close()
+	}
+	return nil
+}
+
+// ScanNetworks triggers a network scan
+func (b *IWDBackend) ScanNetworks() error {
+	err := b.station.Scan()
+	if err != nil {
+		return fmt.Errorf("erreur lors du scan: %v", err)
+	}
+	return nil
+}
+
+// GetOrderedNetworks returns networks sorted by signal strength in backend-agnostic format
+func (b *IWDBackend) GetOrderedNetworks() ([]backend.BackendNetwork, error) {
+	networkInfos, err := b.station.GetOrderedNetworks()
+	if err != nil {
+		return nil, fmt.Errorf("erreur lors de la récupération des réseaux: %v", err)
+	}
+
+	var networks []backend.BackendNetwork
+	seenSSIDs := make(map[string]bool)
+
+	for _, netInfo := range networkInfos {
+		network := NewNetwork(b.conn, netInfo.Path)
+		props, err := network.GetProperties()
+		if err != nil {
+			continue
+		}
+
+		if props.Name == "" || seenSSIDs[props.Name] {
+			continue
+		}
+		seenSSIDs[props.Name] = true
+
+		// Convert iwd network to backend-agnostic format
+		backendNet := backend.BackendNetwork{
+			SSID:         props.Name,
+			SignalDBm:    netInfo.Signal / 100, // iwd provides 100*dBm, convert to dBm
+			SecurityType: props.Type,
+			BSSID:        generateSyntheticBSSID(props.Name), // iwd doesn't expose BSSID
+			Frequency:    0,                                  // iwd doesn't expose frequency in GetOrderedNetworks
+		}
+
+		networks = append(networks, backendNet)
+	}
+
+	return networks, nil
+}
+
+// IsScanning checks if a scan is currently in progress
+func (b *IWDBackend) IsScanning() (bool, error) {
+	return b.station.IsScanning()
+}
+
+// Connect connects to a WiFi network
+func (b *IWDBackend) Connect(ssid, password string) error {
+	// Store passphrase in agent for callback
+	if password != "" {
+		b.agent.SetPassphrase(ssid, password)
+	}
+
+	// Ensure passphrase is cleared after connection attempt
+	defer func() {
+		if password != "" {
+			b.agent.ClearPassphrase(ssid)
+		}
+	}()
+
+	// Get network object
+	network, err := b.station.GetNetwork(ssid)
+	if err != nil {
+		return fmt.Errorf("réseau '%s' non trouvé: %v", ssid, err)
+	}
+
+	// Connect - iwd will call agent.RequestPassphrase() if needed
+	if err := network.Connect(); err != nil {
+		return fmt.Errorf("erreur lors de la connexion: %v", err)
+	}
+
+	return nil
+}
+
+// Disconnect disconnects from the current WiFi network
+func (b *IWDBackend) Disconnect() error {
+	if err := b.station.Disconnect(); err != nil {
+		return fmt.Errorf("erreur lors de la déconnexion: %v", err)
+	}
+	return nil
+}
+
+// GetConnectionState returns the current WiFi connection state
+func (b *IWDBackend) GetConnectionState() (backend.ConnectionState, error) {
+	state, err := b.station.GetState()
+	if err != nil {
+		return backend.StateDisconnected, err
+	}
+	return mapIWDState(state), nil
+}
+
+// GetConnectedSSID returns the SSID of the currently connected network
+func (b *IWDBackend) GetConnectedSSID() string {
+	network, err := b.station.GetConnectedNetwork()
+	if err != nil {
+		return ""
+	}
+
+	props, err := network.GetProperties()
+	if err != nil {
+		return ""
+	}
+
+	return props.Name
+}
+
+// StartEventMonitoring starts monitoring WiFi events
+func (b *IWDBackend) StartEventMonitoring(callbacks backend.EventCallbacks) error {
+	b.callbacks = callbacks
+
+	// Create signal monitor
+	b.signalMonitor = NewSignalMonitor(b.conn, b.station)
+
+	// Register callbacks - wrap to convert iwd types to backend types
+	b.signalMonitor.OnStateChange(func(state StationState, ssid string) {
+		if b.callbacks.OnStateChange != nil {
+			b.callbacks.OnStateChange(mapIWDState(state), ssid)
+		}
+	})
+
+	b.signalMonitor.OnScanComplete(func() {
+		if b.callbacks.OnScanComplete != nil {
+			b.callbacks.OnScanComplete()
+		}
+	})
+
+	// Start monitoring
+	return b.signalMonitor.Start()
+}
+
+// StopEventMonitoring stops monitoring WiFi events
+func (b *IWDBackend) StopEventMonitoring() {
+	if b.signalMonitor != nil {
+		b.signalMonitor.Stop()
+	}
+}
+
+// mapIWDState maps iwd-specific states to backend-agnostic states
+func mapIWDState(state StationState) backend.ConnectionState {
+	switch state {
+	case StateConnected:
+		return backend.StateConnected
+	case StateConnecting:
+		return backend.StateConnecting
+	case StateDisconnecting:
+		return backend.StateDisconnecting
+	case StateDisconnected:
+		return backend.StateDisconnected
+	case StateRoaming:
+		// Map roaming to connected since we're still connected during roaming
+		return backend.StateConnected
+	default:
+		return backend.StateDisconnected
+	}
+}
+
+// generateSyntheticBSSID generates a consistent fake BSSID from SSID
+// (iwd doesn't expose real BSSID)
+func generateSyntheticBSSID(ssid string) string {
+	// Use a simple hash approach - consistent per SSID
+	hash := 0
+	for _, c := range ssid {
+		hash = ((hash << 5) - hash) + int(c)
+	}
+
+	// Generate 6 bytes for MAC address
+	b1 := byte((hash >> 0) & 0xff)
+	b2 := byte((hash >> 8) & 0xff)
+	b3 := byte((hash >> 16) & 0xff)
+	b4 := byte((hash >> 24) & 0xff)
+	b5 := byte(len(ssid) & 0xff)
+	b6 := byte((len(ssid) >> 8) & 0xff)
+
+	return fmt.Sprintf("%02x:%02x:%02x:%02x:%02x:%02x", b1, b2, b3, b4, b5, b6)
+}

internal/wifi/wifi.go

@@ -6,102 +6,54 @@ import (
 	"strings"
 	"time"
 
-	"github.com/godbus/dbus/v5"
 	"github.com/gorilla/websocket"
 	"github.com/nemunaire/repeater/internal/models"
-	"github.com/nemunaire/repeater/internal/wifi/iwd"
-)
-
-const (
-	AGENT_PATH = "/com/github/nemunaire/repeater/agent"
+	"github.com/nemunaire/repeater/internal/wifi/backend"
 )
 
 var (
-	wlanInterface   string
-	dbusConn        *dbus.Conn
-	iwdManager      *iwd.Manager
-	station         *iwd.Station
-	agent           *iwd.Agent
-	agentManager    *iwd.AgentManager
-	eventMonitor    *iwd.SignalMonitor
+	wifiBackend     backend.WiFiBackend
 	wifiBroadcaster *WifiBroadcaster
 )
 
-// Initialize initializes the WiFi service with iwd D-Bus connection
-func Initialize(interfaceName string) error {
-	wlanInterface = interfaceName
+// Initialize initializes the WiFi service with the specified backend
+func Initialize(interfaceName string, backendName string) error {
+	// Create the appropriate backend using the factory
 	var err error
-
-	// Connect to D-Bus
-	dbusConn, err = dbus.SystemBus()
+	wifiBackend, err = createBackend(backendName)
 	if err != nil {
-		return fmt.Errorf("échec de connexion à D-Bus: %v", err)
+		return err
 	}
 
-	// Find station for interface
-	iwdManager = iwd.NewManager(dbusConn)
-	station, err = iwdManager.FindStation(interfaceName)
-	if err != nil {
-		return fmt.Errorf("impossible de trouver la station pour %s: %v", interfaceName, err)
-	}
-
-	// Create and register agent for credential callbacks
-	agent = iwd.NewAgent(dbusConn, dbus.ObjectPath(AGENT_PATH))
-	if err := agent.Export(); err != nil {
-		return fmt.Errorf("échec de l'export de l'agent: %v", err)
-	}
-
-	agentManager = iwd.NewAgentManager(dbusConn)
-	if err := agentManager.RegisterAgent(dbus.ObjectPath(AGENT_PATH)); err != nil {
-		agent.Unexport()
-		return fmt.Errorf("échec de l'enregistrement de l'agent: %v", err)
-	}
-
-	return nil
+	// Initialize the backend
+	return wifiBackend.Initialize(interfaceName)
 }
 
-// Close closes the D-Bus connection and unregisters the agent
+// Close closes the backend connection
 func Close() {
-	if agentManager != nil && agent != nil {
-		agentManager.UnregisterAgent(dbus.ObjectPath(AGENT_PATH))
-		agent.Unexport()
-	}
-	if dbusConn != nil {
-		dbusConn.Close()
+	if wifiBackend != nil {
+		wifiBackend.Close()
 	}
 }
 
 // GetCachedNetworks returns previously discovered networks without triggering a scan
 func GetCachedNetworks() ([]models.WiFiNetwork, error) {
-	// Get ordered networks without scanning
-	networkInfos, err := station.GetOrderedNetworks()
+	// Get ordered networks from backend
+	backendNetworks, err := wifiBackend.GetOrderedNetworks()
 	if err != nil {
 		return nil, fmt.Errorf("erreur lors de la récupération des réseaux: %v", err)
 	}
 
-	var networks []models.WiFiNetwork
-	seenSSIDs := make(map[string]bool)
-
-	for _, netInfo := range networkInfos {
-		network := iwd.NewNetwork(dbusConn, netInfo.Path)
-		props, err := network.GetProperties()
-		if err != nil {
-			continue
-		}
-
-		if props.Name == "" || seenSSIDs[props.Name] {
-			continue
-		}
-		seenSSIDs[props.Name] = true
-
+	// Convert backend networks to models
+	networks := make([]models.WiFiNetwork, 0, len(backendNetworks))
+	for _, backendNet := range backendNetworks {
 		wifiNet := models.WiFiNetwork{
-			SSID:     props.Name,
-			Signal:   signalToStrength(int(netInfo.Signal) / 100),
-			Security: mapSecurityType(props.Type),
-			BSSID:    generateSyntheticBSSID(props.Name),
-			Channel:  0,
+			SSID:     backendNet.SSID,
+			Signal:   signalToStrength(int(backendNet.SignalDBm)),
+			Security: mapSecurityType(backendNet.SecurityType),
+			BSSID:    backendNet.BSSID,
+			Channel:  0, // Not yet exposed by backends
 		}
-
 		networks = append(networks, wifiNet)
 	}
 
@@ -116,47 +68,34 @@ func GetCachedNetworks() ([]models.WiFiNetwork, error) {
 // ScanNetworks scans for available WiFi networks
 func ScanNetworks() ([]models.WiFiNetwork, error) {
 	// Check if already scanning
-	scanning, err := station.IsScanning()
+	scanning, err := wifiBackend.IsScanning()
 	if err == nil && scanning {
 		time.Sleep(3 * time.Second)
 	} else {
 		// Trigger scan
-		err := station.Scan()
+		err := wifiBackend.ScanNetworks()
 		if err != nil && !strings.Contains(err.Error(), "rejected") {
 			return nil, fmt.Errorf("erreur lors du scan: %v", err)
 		}
 		time.Sleep(2 * time.Second)
 	}
 
-	// Get ordered networks
-	networkInfos, err := station.GetOrderedNetworks()
+	// Get ordered networks from backend
+	backendNetworks, err := wifiBackend.GetOrderedNetworks()
 	if err != nil {
 		return nil, fmt.Errorf("erreur lors de la récupération des réseaux: %v", err)
 	}
 
-	var networks []models.WiFiNetwork
-	seenSSIDs := make(map[string]bool)
-
-	for _, netInfo := range networkInfos {
-		network := iwd.NewNetwork(dbusConn, netInfo.Path)
-		props, err := network.GetProperties()
-		if err != nil {
-			continue
-		}
-
-		if props.Name == "" || seenSSIDs[props.Name] {
-			continue
-		}
-		seenSSIDs[props.Name] = true
-
+	// Convert backend networks to models
+	networks := make([]models.WiFiNetwork, 0, len(backendNetworks))
+	for _, backendNet := range backendNetworks {
 		wifiNet := models.WiFiNetwork{
-			SSID:     props.Name,
-			Signal:   signalToStrength(int(netInfo.Signal) / 100),
-			Security: mapSecurityType(props.Type),
-			BSSID:    generateSyntheticBSSID(props.Name),
-			Channel:  0,
+			SSID:     backendNet.SSID,
+			Signal:   signalToStrength(int(backendNet.SignalDBm)),
+			Security: mapSecurityType(backendNet.SecurityType),
+			BSSID:    backendNet.BSSID,
+			Channel:  0, // Not yet exposed by backends
 		}
-
 		networks = append(networks, wifiNet)
 	}
 
@@ -173,29 +112,11 @@ func ScanNetworks() ([]models.WiFiNetwork, error) {
 	return networks, nil
 }
 
-// Connect connects to a WiFi network using iwd agent callback
+// Connect connects to a WiFi network
 func Connect(ssid, password string) error {
-	// Store passphrase in agent for callback
-	if password != "" {
-		agent.SetPassphrase(ssid, password)
-	}
-
-	// Ensure passphrase is cleared after connection attempt
-	defer func() {
-		if password != "" {
-			agent.ClearPassphrase(ssid)
-		}
-	}()
-
-	// Get network object
-	network, err := station.GetNetwork(ssid)
-	if err != nil {
-		return fmt.Errorf("réseau '%s' non trouvé: %v", ssid, err)
-	}
-
-	// Connect - iwd will call agent.RequestPassphrase() if needed
-	if err := network.Connect(); err != nil {
-		return fmt.Errorf("erreur lors de la connexion: %v", err)
+	// Use backend to connect
+	if err := wifiBackend.Connect(ssid, password); err != nil {
+		return err
 	}
 
 	// Poll for connection
@@ -211,65 +132,51 @@ func Connect(ssid, password string) error {
 
 // Disconnect disconnects from the current WiFi network
 func Disconnect() error {
-	if err := station.Disconnect(); err != nil {
-		return fmt.Errorf("erreur lors de la déconnexion: %v", err)
-	}
-	return nil
+	return wifiBackend.Disconnect()
 }
 
-// IsConnected checks if WiFi is connected using iwd
+// IsConnected checks if WiFi is connected
 func IsConnected() bool {
-	state, err := station.GetState()
+	state, err := wifiBackend.GetConnectionState()
 	if err != nil {
 		return false
 	}
-	return state == iwd.StateConnected
+	return state == backend.StateConnected
 }
 
 // GetConnectedSSID returns the SSID of the currently connected network
 func GetConnectedSSID() string {
-	network, err := station.GetConnectedNetwork()
-	if err != nil {
-		return ""
-	}
-
-	props, err := network.GetProperties()
-	if err != nil {
-		return ""
-	}
-
-	return props.Name
+	return wifiBackend.GetConnectedSSID()
 }
 
 // GetConnectionState returns the current WiFi connection state
 func GetConnectionState() string {
-	state, err := station.GetState()
+	state, err := wifiBackend.GetConnectionState()
 	if err != nil {
-		return string(iwd.StateDisconnected)
+		return string(backend.StateDisconnected)
 	}
 	return string(state)
 }
 
-// StartEventMonitoring initializes D-Bus signal monitoring and WebSocket broadcasting
+// StartEventMonitoring initializes signal monitoring and WebSocket broadcasting
 func StartEventMonitoring() error {
 	// Initialize broadcaster
 	wifiBroadcaster = NewWifiBroadcaster()
 
-	// Create signal monitor
-	eventMonitor = iwd.NewSignalMonitor(dbusConn, station)
+	// Set up callbacks
+	callbacks := backend.EventCallbacks{
+		OnStateChange:  handleStateChange,
+		OnScanComplete: handleScanComplete,
+	}
 
-	// Register callbacks
-	eventMonitor.OnStateChange(handleStateChange)
-	eventMonitor.OnScanComplete(handleScanComplete)
-
-	// Start monitoring
-	return eventMonitor.Start()
+	// Start backend monitoring
+	return wifiBackend.StartEventMonitoring(callbacks)
 }
 
-// StopEventMonitoring stops D-Bus signal monitoring
+// StopEventMonitoring stops signal monitoring
 func StopEventMonitoring() {
-	if eventMonitor != nil {
-		eventMonitor.Stop()
+	if wifiBackend != nil {
+		wifiBackend.StopEventMonitoring()
 	}
 }
 
@@ -288,7 +195,7 @@ func UnregisterWebSocketClient(conn *websocket.Conn) {
 }
 
 // handleStateChange is called when WiFi connection state changes
-func handleStateChange(newState iwd.StationState, connectedSSID string) {
+func handleStateChange(newState backend.ConnectionState, connectedSSID string) {
 	if wifiBroadcaster != nil {
 		wifiBroadcaster.BroadcastStateChange(string(newState), connectedSSID)
 	}
@@ -303,9 +210,9 @@ func handleScanComplete() {
 	}
 }
 
-// mapSecurityType maps iwd security types to display format
-func mapSecurityType(iwdType string) string {
-	switch iwdType {
+// mapSecurityType maps backend security types to display format
+func mapSecurityType(securityType string) string {
+	switch securityType {
 	case "open":
 		return "Open"
 	case "wep":
@@ -319,25 +226,6 @@ func mapSecurityType(iwdType string) string {
 	}
 }
 
-// generateSyntheticBSSID generates a consistent fake BSSID from SSID
-func generateSyntheticBSSID(ssid string) string {
-	// Use a simple hash approach - consistent per SSID
-	hash := 0
-	for _, c := range ssid {
-		hash = ((hash << 5) - hash) + int(c)
-	}
-
-	// Generate 6 bytes for MAC address
-	b1 := byte((hash >> 0) & 0xff)
-	b2 := byte((hash >> 8) & 0xff)
-	b3 := byte((hash >> 16) & 0xff)
-	b4 := byte((hash >> 24) & 0xff)
-	b5 := byte(len(ssid) & 0xff)
-	b6 := byte((len(ssid) >> 8) & 0xff)
-
-	return fmt.Sprintf("%02x:%02x:%02x:%02x:%02x:%02x", b1, b2, b3, b4, b5, b6)
-}
-
 // signalToStrength converts signal level (dBm) to strength (1-5)
 func signalToStrength(level int) int {
 	if level >= -30 {