dns.lua

local computer=require("computer")
local event=require("event")

local dns={}

function dns.ns(name, n)
  local t1=os.time()
  local t2=os.time()
  local k=true
  local f=false
  local addr=""
  computer.pushSignal("dnsGet", name, n)
  while k and not f do
    t2=os.time()
    if t1+120<t2 or t2<t1-99 then
      k=false
    end
     e, addr, rname= event.pull(2, "dnsReq")
     if e~=nil and rname==name then
       f=true
     end
  end
  if f then
    return addr
  else
     return ""
  end
end

return dns