create a udp client on a specific port in go

main.go
package main

import (
	"fmt"
	"net"
)

func main() {
	// Define the UDP address and port to connect to
	serverAddr, err := net.ResolveUDPAddr("udp", "localhost:8888")
	if err != nil {
		panic(err)
	}

	// create a UDP connection
	conn, err := net.DialUDP("udp", nil, serverAddr)
	if err != nil {
		panic(err)
	}
	defer conn.Close()

	// Send a message to the server
	message := []byte("Hello, server!")
	_, err = conn.Write(message)
	if err != nil {
		panic(err)
	}

	// Receive a response from the server
	buffer := make([]byte, 1024)
	n, _, err := conn.ReadFromUDP(buffer)
	if err != nil {
		panic(err)
	}

	fmt.Printf("Response from server: %s\n", string(buffer[:n]))
}
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In this example, we create a UDP client that connects to a specific port on the localhost. We use net.ResolveUDPAddr to resolve the address and port of the server we want to connect to. We then use net.DialUDP to create a UDP connection.

Once the connection is established, we send a message to the server using conn.Write. We then receive a response from the server using conn.ReadFromUDP.

Finally, we print the response from the server to the console. This example can be modified to work with any UDP server by changing the address and port that are resolved in net.ResolveUDPAddr.

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