/*
   Copyright 2016 gtalent2@gmail.com

   This Source Code Form is subject to the terms of the Mozilla Public
   License, v. 2.0. If a copy of the MPL was not distributed with this
   file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package main

import (
	"bytes"
	"log"
	"os/exec"
	"strconv"
)

// just have this stub to allow building on Linux
func setupPortForward(ruleName, ip, port string) {
	log.Print("Port forwarding not currently implemented for Linux/iptables")
}

func portUsageCount(ports ...int) int {
	cmd := "sockstat -4c"
	for _, v := range ports {
		cmd += " -p " + strconv.Itoa(v)
	}
	out, err := exec.Command(cmd).Output()
	if err != nil {
		log.Println("Port Usage Check: Could not run ", cmd)
	}
	return bytes.Count(out, []byte{'\n'}) - 1
}