Example of a simply UDP client

[JohnAD]

On the off change that @dom96's advice to use async was part of the problem. I 
converted it to async:
    
    
    import asyncdispatch, asyncnet
    import std/[net, selectors, strformat, strutils]
    
    const
      cfgMaxPacket = 500
      clientPort = 8800
      clientHost = "127.0.0.1"
      serverPort = 9900
      serverHost = "192.168.1.45"
    
    
    proc doit() {.async.} =
      let
        socket = newAsyncSocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)
        events = newSelector[int]()
      socket.bindAddr(Port(clientPort), clientHost)
      events.registerHandle(socket.getFd, {Read}, 0)
      events.registerHandle(0, {Read}, 0) # stdin
      echo &"Listening to stdin and {clientHost}:{clientPort}; transmitting to 
{serverHost}:{serverPort}"
      while true:
        for got in events.select(-1):
          if got.fd == socket.getFd().int:
            var msgDetails = await socket.recvFrom(cfgMaxPacket)
            let message = msgDetails.data
            echo "got UDP: ", message.strip
          elif got.fd == 0:
            try:
              await socket.sendTo(serverHost, Port(serverPort), 
stdin.readLine())
            except EOFError:
              quit()
    
    
    
    asyncCheck doit()
    runForever()
    
    
    Run

Sadly that does not fix it. Like before, a local address works for UDP, but 
everything else breaks.