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'use strict'

/* global __appdir */
var path = require('path')
var config = require(path.join(__appdir, 'config', 'config')).tftp

var envPort = process.env.PORT
envPort++

var port = normalizePort(config.port || envPort || '69')
var host = config.host
var root = config.root

var tftp = require('tftp')
var server = tftp.createServer({
  host: host,
  port: port,
  root: root,
  denyPut: true
})

server.on('error', function (error) {
  // Errors from the main socket
  console.error(error)
})

server.on('request', function (req) {
  req.on('error', function (error) {
    // Error from the request
    console.error(error)
  })
})

server.listen()

function normalizePort (val) {
  var port = parseInt(val, 10)

  if (isNaN(port)) {
    // named pipe
    return val
  }

  if (port >= 0) {
    // port number
    return port
  }

  return false
}