go udp 简单实现

服务器端 udpserver.go

// udpServer project main.go package main import ( "fmt" "net" ) func main() { fmt.Println("udpserver") socket, err := net.ListenUDP("udp4", &net.UDPAddr{ IP: net.IPv4(0, 0, 0, 0), Port: 8080, }) if err != nil { fmt.Println("listern ", err) return } defer socket.Close() for { data := make([]byte, 20) read, remoteAddr, err := socket.ReadFromUDP(data) if err != nil { fmt.Println("read data ", err) continue } fmt.Println(read, remoteAddr) fmt.Printf("%s\n", data) send_data := []byte("hi client!") _, err = socket.WriteToUDP(send_data, remoteAddr) if err != nil { return fmt.Println("send fail!", err) } } }

客户端 udpclient.go

// udpClient project main.go package main import ( "fmt" "net" ) func main() { fmt.Println("udpClient") socket, err := net.DialUDP("udp4", nil, &net.UDPAddr{ IP: net.IPv4(127, 0, 0, 1), Port: 8080, }) if err != nil { fmt.Println("connect fail !", err) return } defer socket.Close() senddata := []byte("hi server!") _, err = socket.Write(senddata) if err != nil { fmt.Println("send fail !", err) return } data := make([]byte, 20) read, remoteAddr, err := socket.ReadFromUDP(data) if err != nil { fmt.Println("read fail !", err) return } fmt.Println(read, remoteAddr) fmt.Printf("%s\n", data) }

服务器端运行：go run main.go udpserver 10 127.0.0.1:61748 hi server!

客户端运行：go run main.go udpClient 10 127.0.0.1:8080 hi client!