diff --git a/examples/discovery_test.go b/examples/discovery_test.go
new file mode 100644
index 0000000..fbe6ac8
--- /dev/null
+++ b/examples/discovery_test.go
@@ -0,0 +1,84 @@
+package example
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"log"
+	"path"
+	"regexp"
+	"strings"
+	"testing"
+
+	"github.com/beevik/etree"
+	"github.com/use-go/onvif"
+	"github.com/use-go/onvif/device"
+	discover "github.com/use-go/onvif/ws-discovery"
+)
+
+func TestGetAvailableDevicesAtSpecificEthernetInterface(t *testing.T) {
+
+	// client()
+	// runDiscovery("en0")
+	s := onvif.GetAvailableDevicesAtSpecificEthernetInterface("en0")
+
+	log.Printf("%s", s)
+}
+
+func client() {
+	dev, err := onvif.NewDevice("192.168.3.10")
+	if err != nil {
+		panic(err)
+	}
+	dev.Authenticate("admin", "zsyy12345")
+
+	log.Printf("output %+v", dev.GetServices())
+
+	res, err := dev.CallMethod(device.GetUsers{})
+	bs, _ := ioutil.ReadAll(res.Body)
+	log.Printf("output %+v %s", res.StatusCode, bs)
+}
+
+// Host host
+type Host struct {
+	URL  string `json:"url"`
+	Name string `json:"name"`
+}
+
+func runDiscovery(interfaceName string) {
+	var hosts []*Host
+	devices := discover.SendProbe(interfaceName, nil, []string{"dn:NetworkVideoTransmitter"}, map[string]string{"dn": "http://www.onvif.org/ver10/network/wsdl"})
+	for _, j := range devices {
+		doc := etree.NewDocument()
+		if err := doc.ReadFromString(j); err != nil {
+			log.Printf("error %s", err)
+		} else {
+
+			endpoints := doc.Root().FindElements("./Body/ProbeMatches/ProbeMatch/XAddrs")
+			scopes := doc.Root().FindElements("./Body/ProbeMatches/ProbeMatch/Scopes")
+
+			flag := false
+
+			host := &Host{}
+
+			for _, xaddr := range endpoints {
+				xaddr := strings.Split(strings.Split(xaddr.Text(), " ")[0], "/")[2]
+				host.URL = xaddr
+			}
+			if flag {
+				break
+			}
+			for _, scope := range scopes {
+				re := regexp.MustCompile(`onvif:\/\/www\.onvif\.org\/name\/[A-Za-z0-9-]+`)
+				match := re.FindStringSubmatch(scope.Text())
+				host.Name = path.Base(match[0])
+			}
+
+			hosts = append(hosts, host)
+
+		}
+
+	}
+
+	bys, _ := json.Marshal(hosts)
+	log.Printf("done %s", bys)
+}