index.js

const optionsConv     = require('./lib/option_converter')
    , Server          = require('./lib/server')
    , Agent           = require('./lib/agent')
    , net             = require('net')
    , URL             = require('url')
    , globalAgent     = new Agent({ type: 'udp4' })
    , globalAgentV6   = new Agent({ type: 'udp6' })

module.exports.request = function(url) {
  var agent, req, ipv6

  if (typeof url === 'string')
    url = URL.parse(url)

  ipv6 = net.isIPv6(url.hostname)

  if (url.agent)
    agent = url.agent
  else if (url.agent === false && !ipv6)
    agent = new Agent({ type: 'udp4' })
  else if (url.agent === false && ipv6)
    agent = new Agent({ type: 'udp6' })
  else if (ipv6)
    agent = globalAgentV6
  else
    agent = globalAgent

  return agent.request(url)
}

module.exports.createServer = Server

module.exports.Agent = Agent
module.exports.globalAgent = globalAgent
module.exports.globalAgentIPv6 = globalAgentV6

module.exports.registerOption = optionsConv.registerOption
module.exports.registerFormat = optionsConv.registerFormat