EchoClient.go

package main

import (
	"fmt"
	"net"
	"os"
	"time"
	"strconv"
)

func main() {

	/* Enter Server details.*/ 
	ServerAddr, err := net.ResolveUDPAddr("udp", "0.0.0.0:11000")
	if err != nil {
		fmt.Println("Error: ", err)
		os.Exit(0)
	}

	/* Create a UDP socket.*/ 
	ClientAddr, err := net.ResolveUDPAddr("udp", "0.0.0.0:11001")
	if err != nil {
		fmt.Println("Error in creating client socket: ", err)
		os.Exit(0)
	}

	/* Initiate connection. */
	conn , err := net.DialUDP("udp", ClientAddr, ServerAddr)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(0)
	}
	defer conn.Close()

	for i:=0 ; i<10; i++ {
		/* Create some random message to send to Server.*/
		payload := strconv.Itoa(i)

		/* Must convert to Byte message.*/
		buf := []byte(payload)
		_, err := conn.Write(buf)

		if err != nil {
			fmt.Println(payload, err)
		}

		reply := make([]byte, 1024)

		_, err = conn.Read(reply)

		println("reply from server=", string(reply))

		time.Sleep(time.Second * 1)
	}
}