Golang TCP server

main.go

package main

import (
	"encoding/hex"
	"errors"
	"flag"
	"fmt"
	"io"
	"log"
	"net"
)

func main() {
	portPtr := flag.Int("p", 1024, "port")
	address := fmt.Sprintf(":%d", *portPtr)
	log.Printf("Starting server... 0.0.0.0:%d\n", *portPtr)
	l, err := net.Listen("tcp", address)
	if err != nil {
		log.Fatalln(err)
	}
	defer l.Close()
	for {
		conn, err := l.Accept()
		if err != nil {
			log.Println(err)
			continue
		}
		go ConnHandler(conn)
	}
}

func ConnHandler(conn net.Conn) {
	defer func() {
		if err := recover(); err != nil {
			log.Println(err)
		}
	}()
	defer conn.Close()
	addr := conn.RemoteAddr()
	log.Printf("(%s) connected\n", addr.String())
	buf := make([]byte, 4096)
	for {
		n, err := conn.Read(buf)
		if err != nil {
			if errors.Is(err, io.EOF) {
				log.Printf("(%s) disconnected\n", addr.String())
				return
			}

			log.Println(err)
			return
		}
		if n == 0 {
			continue
		}
		data := buf[:n]
		log.Printf("(%s) %s", addr.String(), hex.Dump(data))
	}
}