localip 实时获取 防止树莓派ip变化，udp发送不成功

main.go

@@ -69,6 +69,15 @@ func main() {
 
 
 func broadcast()  {
+	var pai pai_service.Pai
+	send := "hello world"
+	ok := pai.GetConfig()
+	if ok {
+		send = pai.Serial
+	}
+
+	for {
+		//ip 会变化
 		ip,err := util.GetLocalIP()
 		if err != nil {
 			log.Fatal(err)
@@ -87,17 +96,8 @@ func broadcast()  {
 		conn, err := net.DialUDP("udp", &laddr, &raddr)
 		if err != nil {
 			log.Println(err.Error())
-		return
 		}
-	var pai pai_service.Pai
-	send := "hello world"
-	ok := pai.GetConfig()
-	if ok {
-		send = pai.Serial
-	}
-
-	for {
-		_, err := conn.Write([]byte(send))
+		_, err = conn.Write([]byte(send))
 		if err != nil{
 			fmt.Println(err)
 		}