client.nim

import net
var socket = newSocket()
socket.connect("localhost",Port(9000))

type Foo = tuple[a,b,c,d: int]

var data: Foo = (a: 1, b: 2, c: 3, d: 4)
discard socket.send(data.addr, sizeof(Foo))
socket.close()

recv.nim

import net
var socket = newSocket()
socket.bindAddr(Port(9000))
socket.listen()

echo "server listening..."

type Foo = tuple[a,b,c,d: int]

var client = newSocket()
var address = ""

while true:
  socket.acceptAddr(client, address)
  echo "client connected from ", address
  var data: Foo
  discard client.recv(data.addr, sizeof(Foo))
  echo data
  client.close()