[pkg] initialize service early for windows

cmd/bitmask-helper/main.go

@@ -39,5 +39,6 @@ func main() {
 	}
 	config.Version = version
 
-	helper.ServeHTTP(preferredPort)
+	// StartHelper is the main entry point - it also handles cli args in windows, and starts the http server.
+	helper.StartHelper(preferredPort)
 }

pkg/helper/darwin.go

@@ -87,11 +87,11 @@ func daemonize() {
 	log.Print("bitmask-helper daemon started")
 }
 
-func doHandleCommands(preferredPort int) {
+func runServer(preferredPort int) {
 	port := getFirstAvailablePortFrom(preferredPort)
 	writePortToFile(port)
 	bindAddr := "localhost:" + strconv.Itoa(port)
-	runCommandServer(bindAddr)
+	serveHTTP(bindAddr)
 }
 
 func getOpenvpnPath() string {

pkg/helper/helper.go

@@ -33,7 +33,19 @@ type openvpnT struct {
 	cmd *exec.Cmd
 }
 
-func runCommandServer(bindAddr string) {
+// startHelper is the main entrypoint. It can react to cli args (used to install or manage the service in windows), and
+// eventually will start the http server.
+func StartHelper(port int) {
+	initializeService(port)
+	parseCliArgs()
+	daemonize()
+	runServer(port)
+}
+
+// serveHTTP will start the HTTP server that exposes the firewall and openvpn api.
+// this can be called at different times by the different implementations of the helper.
+func serveHTTP(bindAddr string) {
+	log.Println("Starting HTTP server at", bindAddr)
 	openvpn := openvpnT{nil}
 	http.HandleFunc("/openvpn/start", openvpn.start)
 	http.HandleFunc("/openvpn/stop", openvpn.stop)
@@ -45,12 +57,6 @@ func runCommandServer(bindAddr string) {
 	log.Fatal(http.ListenAndServe(bindAddr, nil))
 }
 
-func ServeHTTP(port int) {
-	parseCliArgs()
-	daemonize()
-	doHandleCommands(port)
-}
-
 func (openvpn *openvpnT) start(w http.ResponseWriter, r *http.Request) {
 	args, err := getArgs(r)
 	if err != nil {

pkg/helper/linux.go

@@ -45,10 +45,13 @@ func parseCliArgs() {
 	// linux helper does not reply to args
 }
 
+func initializeService(port int) {}
+
 func daemonize() {}
 
-func doHandleCommands(port int) {
-	runCommandServer("localhost:" + strconv.Itoa(port))
+func runServer(port int) {
+	// defined in helper.go
+	serveHTTP("localhost:" + strconv.Itoa(port))
 }
 
 func getOpenvpnPath() string {

pkg/helper/windows.go

@@ -37,15 +37,20 @@ const (
 	chocoOpenvpnPath = `C:\Program Files\OpenVPN\bin\openvpn.exe`
 )
 
+type httpConf struct {
+	BindAddr string
+}
+
 var (
 	platformOpenvpnFlags = []string{
 		"--script-security", "1",
 		"--block-outside-dns",
 	}
-	httpBindAddr string
+	httpServerConf = &httpConf{}
 )
 
 func parseCliArgs() {
+	log.Println("Parsing CLI args...")
 	isIntSess, err := svc.IsAnInteractiveSession()
 	if err != nil {
 		log.Fatalf("Failed to determine if we are running in an interactive session: %v", err)
@@ -54,15 +59,18 @@ func parseCliArgs() {
 		runService(svcName, false)
 		return
 	}
+	log.Println("Checking for admin")
 	admin := isAdmin()
 	fmt.Printf("Running as admin: %v\n", admin)
 	if !admin {
-		log.Fatal("Needs to be run as administrator")
+		fmt.Println("Needs to be run as administrator")
+		os.Exit(2)
 	}
 	if len(os.Args) < 2 {
 		usage("ERROR: no command specified")
 	}
 	cmd := strings.ToLower(os.Args[1])
+	log.Println("cmd:", cmd)
 	switch cmd {
 	case "debug":
 		runService(svcName, true)
@@ -95,16 +103,19 @@ func usage(errmsg string) {
 	os.Exit(2)
 }
 
-func daemonize() {}
-
-// http server is called from within Execute in windows
-func doHandleCommands(preferredPort int) {
+// initializeService only initializes the server.
+// we expect serveHTTP to be called from within Execute in windows
+func initializeService(preferredPort int) {
 	port := getFirstAvailablePortFrom(preferredPort)
 	writePortToFile(port)
-	bindAddr := "localhost:" + strconv.Itoa(port)
-	httpBindAddr = bindAddr
+	httpServerConf.BindAddr = "localhost:" + strconv.Itoa(port)
+	log.Println("Command server initialized to listen on", httpServerConf.BindAddr)
 }
 
+func daemonize() {}
+
+func runServer(port int) {}
+
 func getOpenvpnPath() string {
 	if _, err := os.Stat(openvpnPath); !os.IsNotExist(err) {
 		return openvpnPath

pkg/helper/windows_service.go

@@ -8,6 +8,7 @@ package helper
 
 import (
 	"fmt"
+	"log"
 
 	"golang.org/x/sys/windows/svc"
 	"golang.org/x/sys/windows/svc/debug"
@@ -22,13 +23,17 @@ func (m *myservice) Execute(args []string, r <-chan svc.ChangeRequest, changes c
 	const cmdsAccepted = svc.AcceptStop | svc.AcceptShutdown | svc.AcceptPauseAndContinue
 	changes <- svc.Status{State: svc.StartPending}
 	changes <- svc.Status{State: svc.Running, Accepts: cmdsAccepted}
-	go runCommandServer(httpBindAddr)
+
+	// defined in helper.go
+	// TODO should have a way to stop it --
+	//go serveHTTP("localhost:7171")
+	log.Println("serving>>", httpServerConf.BindAddr)
+	go serveHTTP(httpServerConf.BindAddr)
 loop:
 	for {
 		select {
 		case c := <-r:
 			switch c.Cmd {
-			// TODO start??
 			case svc.Interrogate:
 				changes <- c.CurrentStatus
 			case svc.Stop, svc.Shutdown:
@@ -44,6 +49,9 @@ loop:
 }
 
 func runService(name string, isDebug bool) {
+
+	log.Println("Running service...")
+
 	var err error
 	if isDebug {
 		elog = debug.New(name)