package main

import (
	"fmt"
	"net"
	"sync"
	"time"
)

func connection(port string, ip string, portWG *sync.WaitGroup) (bool, error) {
	connString := ip + ":" + port
	timeout := time.Second * time.Duration(5)
	conn, err := net.DialTimeout("tcp", connString, timeout)
	if err != nil {
		defer portWG.Done()
		return false, err
	}
	conn.Close()
	fmt.Println(port)
	defer portWG.Done()
	return true, nil
}

func scanIp(ports []string, ip string, hostWG *sync.WaitGroup) {
	var portWG sync.WaitGroup

	for i := range ports {
		portWG.Add(1)
		go connection(ports[i], ip, &portWG)
	}
	portWG.Wait()
	defer hostWG.Done()
}