package main

import (
    "fmt"
    "net"
    "bytes"
    "encoding/gob"
)

type Broadcast struct {
    name string
    desc string
    code int32
}

func (b Broadcast) toByte() []byte {
    var buf bytes.Buffer
    enc := gob.NewEncoder(&buf)
    err := enc.Encode(b)
    if err != nil {
        panic(err)
    }
    return buf.Bytes()
}

// UDP 客户端
func main() {
    socket, err := net.DialUDP("udp", nil, &net.UDPAddr{
        IP:   net.IPv4(0, 0, 0, 0),
        Port: 30000,
    })
    if err != nil {
        fmt.Println("连接服务端失败，err:", err)
        return
    }
    defer socket.Close()
    // sendData := []byte("Hello server")
    sendData := Broadcast{"hhh", "halppy", 1}
    _, err = socket.Write(sendData.toByte()) // 发送数据
    if err != nil {
        fmt.Println("发送数据失败，err:", err)
        return
    }
    data := make([]byte, 4096)
    n, remoteAddr, err := socket.ReadFromUDP(data) // 接收数据
    if err != nil {
        fmt.Println("接收数据失败，err:", err)
        return
    }
    fmt.Printf("recv:%v addr:%v count:%v\n", string(data[:n]), remoteAddr, n)
}