Monitor network changes and restart engine on detection (#1904)

client/cmd/root.go

@@ -32,6 +32,7 @@ const (
 	preSharedKeyFlag        = "preshared-key"
 	interfaceNameFlag       = "interface-name"
 	wireguardPortFlag       = "wireguard-port"
+	networkMonitorFlag      = "network-monitor"
 	disableAutoConnectFlag  = "disable-auto-connect"
 	serverSSHAllowedFlag    = "allow-server-ssh"
 	extraIFaceBlackListFlag = "extra-iface-blacklist"
@@ -62,6 +63,7 @@ var (
 	serverSSHAllowed        bool
 	interfaceName           string
 	wireguardPort           uint16
+	networkMonitor          bool
 	serviceName             string
 	autoConnectDisabled     bool
 	extraIFaceBlackList     []string

client/cmd/up.go

@@ -40,6 +40,7 @@ func init() {
 	upCmd.PersistentFlags().BoolVarP(&foregroundMode, "foreground-mode", "F", false, "start service in foreground")
 	upCmd.PersistentFlags().StringVar(&interfaceName, interfaceNameFlag, iface.WgInterfaceDefault, "Wireguard interface name")
 	upCmd.PersistentFlags().Uint16Var(&wireguardPort, wireguardPortFlag, iface.DefaultWgPort, "Wireguard interface listening port")
+	upCmd.PersistentFlags().BoolVarP(&networkMonitor, networkMonitorFlag, "N", false, "Enable network monitoring")
 	upCmd.PersistentFlags().StringSliceVar(&extraIFaceBlackList, extraIFaceBlackListFlag, nil, "Extra list of default interfaces to ignore for listening")
 }
 
@@ -116,6 +117,10 @@ func runInForegroundMode(ctx context.Context, cmd *cobra.Command) error {
 		ic.WireguardPort = &p
 	}
 
+	if cmd.Flag(networkMonitorFlag).Changed {
+		ic.NetworkMonitor = &networkMonitor
+	}
+
 	if rootCmd.PersistentFlags().Changed(preSharedKeyFlag) {
 		ic.PreSharedKey = &preSharedKey
 	}
@@ -226,6 +231,10 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 		loginRequest.WireguardPort = &wp
 	}
 
+	if cmd.Flag(networkMonitorFlag).Changed {
+		loginRequest.NetworkMonitor = &networkMonitor
+	}
+
 	var loginErr error
 
 	var loginResp *proto.LoginResponse