Added localhost to net.Listen() calls to avoid macOS firewall dialog. (#1539)

benchmark/client/main.go

@@ -162,7 +162,7 @@ func main() {
 	flag.Parse()
 	grpc.EnableTracing = *trace
 	go func() {
-		lis, err := net.Listen("tcp", ":0")
+		lis, err := net.Listen("tcp", "localhost:0")
 		if err != nil {
 			grpclog.Fatalf("Failed to listen: %v", err)
 		}

benchmark/latency/latency_test.go

@@ -187,7 +187,7 @@ func TestListenerAndDialer(t *testing.T) {
 	}
 
 	// Create a real listener and wrap it.
-	l, err := net.Listen("tcp", ":0")
+	l, err := net.Listen("tcp", "localhost:0")
 	if err != nil {
 		t.Fatalf("Unexpected error creating listener: %v", err)
 	}

benchmark/server/main.go

@@ -37,7 +37,7 @@ var (
 func main() {
 	flag.Parse()
 	go func() {
-		lis, err := net.Listen("tcp", ":0")
+		lis, err := net.Listen("tcp", "localhost:0")
 		if err != nil {
 			grpclog.Fatalf("Failed to listen: %v", err)
 		}

benchmark/worker/main.go

@@ -195,7 +195,7 @@ func main() {
 	grpc.EnableTracing = false
 
 	flag.Parse()
-	lis, err := net.Listen("tcp", ":"+strconv.Itoa(*driverPort))
+	lis, err := net.Listen("tcp", "localhost:"+strconv.Itoa(*driverPort))
 	if err != nil {
 		grpclog.Fatalf("failed to listen: %v", err)
 	}