tunnel: add gRPC over unix domain socket to the go backend

With gRPC it will be easier to extend the go backend API.
In this commit the Version function is reimplemented in gRPC.

1 files changed, 25 insertions, 4 deletions

diff --git a/tunnel/tools/libwg-go/api-android.go b/tunnel/tools/libwg-go/api-android.go
index d47c5d76..fd0142e1 100644
--- a/tunnel/tools/libwg-go/api-android.go
+++ b/tunnel/tools/libwg-go/api-android.go
@@ -48,6 +48,7 @@ func (l AndroidLogger) Printf(format string, args ...interface{}) {
 type TunnelHandle struct {
 	device *device.Device
 	uapi   net.Listener
+	logger *device.Logger
 }
 
 var tunnelHandles map[int32]TunnelHandle
@@ -208,20 +209,40 @@ func wgGetConfig(tunnelHandle int32) *C.char {
 
 //export wgVersion
 func wgVersion() *C.char {
+	return C.CString(Version())
+}
+
+func Version() string {
 	info, ok := debug.ReadBuildInfo()
 	if !ok {
-		return C.CString("unknown")
+		return "unknown"
 	}
 	for _, dep := range info.Deps {
 		if dep.Path == "golang.zx2c4.com/wireguard" {
 			parts := strings.Split(dep.Version, "-")
 			if len(parts) == 3 && len(parts[2]) == 12 {
-				return C.CString(parts[2][:7])
+				return parts[2][:7]
 			}
-			return C.CString(dep.Version)
+			return dep.Version
 		}
 	}
-	return C.CString("unknown")
+	return "unknown"
+}
+
+//export wgStartGrpc
+func wgStartGrpc(sock_path string) C.int{
+	tag := cstring("WireGuard/GoBackend/gRPC")
+	logger := &device.Logger{
+		Verbosef: AndroidLogger{level: C.ANDROID_LOG_DEBUG, tag: tag}.Printf,
+		Errorf:   AndroidLogger{level: C.ANDROID_LOG_ERROR, tag: tag}.Printf,
+	}
+
+	res, errmsg := StartGrpc(sock_path, logger)
+	if res < 0 {
+		logger.Verbosef("wgStartGrpc: %v (%v)", errmsg, res)
+	}
+
+	return C.int(res)
 }
 
 func main() {}