fix: access: setEther raise crash on darwin.

pkg/libol/udpin_linux_test.go

@@ -0,0 +1,28 @@
+package libol
+
+import (
+	"fmt"
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"time"
+)
+
+func TestOpenUDP_C(t *testing.T) {
+	udp := &UdpInServer{Port: 4500}
+	err := udp.Open()
+	assert.Equal(t, nil, err, "has not error")
+	assert.NotEqual(t, -1, udp.Socket, "valid socket")
+
+	go func() {
+		conn, err := udp.Recv()
+		fmt.Println(conn, err)
+	}()
+
+	err = udp.Send(&UdpInConnection{
+		Spi:        84209,
+		RemoteAddr: "180.109.49.146",
+		RemotePort: 4500,
+	})
+	assert.Equal(t, nil, err, "has not error")
+	time.Sleep(time.Second * 2)
+}