local tA = {...}
local nport = tonumber(tA[1])
local fpath = tostring(tA[2])
for m in component.list("modem") do
 log("[nbsrv] opening port on "..m)
 component.invoke(m,"open",nport)
end
local f=io.open(fpath,"rb")
local nbdata = f:read("*a")
f:close()
spawn("nbsrv: "..tostring(nport)..","..fpath,function() log(xpcall(function()
 while true do
  local _, laddress, raddress, port, _, payload = event.pull("modem_message")
  if port == nport and type(payload) == "string" then
   if payload:len() == 36 then
    local sraddress,spayload = raddress:sub(1,8),payload:sub(1,8)
    log("[nbsrv] request from "..sraddress.."/"..spayload.." on port "..tostring(port))
    for i = 1, nbdata:len(), 2048 do
     component.invoke(laddress,"send",raddress,port,nbdata:sub(i,i+2047))
    end
    component.invoke(laddress,"send",raddress,port,".")
    log("[nbsrv] served request from "..sraddress.."/"..spayload)
   end
  end
 end
end)) end)
log("[nbsrv] nbsrv started.")