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✏️ Editing: cups-info.nse

local ipp = require "ipp"
local shortport = require "shortport"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"

description = [[
Lists printers managed by the CUPS printing service.
]]

author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"safe", "discovery"}

portrule = shortport.port_or_service(631, "ipp", "tcp", "open")

local verbose_states = {
        [ipp.IPP.PrinterState.IPP_PRINTER_IDLE] = "Idle",
        [ipp.IPP.PrinterState.IPP_PRINTER_PROCESSING] = "Processing",
        [ipp.IPP.PrinterState.IPP_PRINTER_STOPPED] = "Stopped",
      }

action = function(host, port)

local helper = ipp.Helper:new(host, port)
  if ( not(helper:connect()) ) then
    return stdnse.format_output(false, "Failed to connect to server")
  end

local status, printers = helper:getPrinters()
  if ( not(status) ) then
    return
  end

local output = {}
  for _, printer in ipairs(printers) do
    table.insert(output, {
      name = printer.name,
      ("DNS-SD Name: %s"):format(printer.dns_sd_name or ""),
      ("Location: %s"):format(printer.location or ""),
      ("Model: %s"):format(printer.model or ""),
      ("State: %s"):format(verbose_states[printer.state] or ""),
      ("Queue: %s print jobs"):format(tonumber(printer.queue_count) or 0),
    } )
  end

if ( 0 ~= #output ) then
    return stdnse.format_output(true, output)
  end
end

MR SKB