gistfile1.nim

import asyncio, sockets, logging

var socket: PAsyncSocket
var port: int

proc setupSocket() =
  debug("Creating asynchronous socket")
  socket = asyncsocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, false)
  doAssert(socket != nil, "Socket creation was unsuccessful")
  debug("Done.")
  
  debug("Binding socket to port")
  const defaultPort = 13337
  const highestPort = 13400
  for port in defaultPort..highestPort:
    try:
      debug("Trying port: $#", port)
      socket.bindAddr(TPort(port))
      port = port # This part
      break
    except EOS:
      let msg = getCurrentExceptionMsg()
      error(msg)
      if port == highestPort:
        let msg = getCurrentExceptionMsg()
        error("Tried all ports, failure: ", msg)
        raise newException(EOS, getCurrentExceptionMsg())
      else:
        continue

proc serve*() =
  info("Starting server..")

  setupSocket()
  echo "yay"