applications/luci-app-ahcp/luasrc/controller/ahcp.lua

   1 -- Copyright 2011 Jo-Philipp Wich <xm@subsignal.org>
   2 -- Licensed to the public under the Apache License 2.0.
   3
   4 module("luci.controller.ahcp", package.seeall)
   5
   6 function index()
   7         if not nixio.fs.access("/etc/config/ahcpd") then
   8                 return
   9         end
  10
  11         entry({"admin", "network", "ahcpd"}, cbi("ahcp"), _("AHCP Server"), 90)
  12         entry({"admin", "network", "ahcpd", "status"}, call("ahcp_status"))
  13 end
  14
  15 function ahcp_status()
  16         local nfs = require "nixio.fs"
  17         local uci = require "luci.model.uci".cursor()
  18         local lsd = uci:get_first("ahcpd", "ahcpd", "lease_dir") or "/var/lib/leases"
  19         local idf = uci:get_first("ahcpd", "ahcpd", "id_file")   or "/var/lib/ahcpd-unique-id"
  20
  21         local rv = {
  22                 uid    = "00:00:00:00:00:00:00:00",
  23                 leases = { }
  24         }
  25
  26         idf = nfs.readfile(idf)
  27         if idf and #idf == 8 then
  28                 rv.uid = "%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X" %{ idf:byte(1, 8) }
  29         end
  30
  31         local itr = nfs.dir(lsd)
  32         if itr then
  33                 local addr
  34                 for addr in itr do
  35                         if addr:match("^%d+%.%d+%.%d+%.%d+$") then
  36                                 local s = nfs.stat(lsd .. "/" .. addr)
  37                                 rv.leases[#rv.leases+1] = {
  38                                         addr = addr,
  39                                         age  = s and (os.time() - s.mtime) or 0
  40                                 }
  41                         end
  42                 end
  43         end
  44
  45         table.sort(rv.leases, function(a, b) return a.age < b.age end)
  46
  47         luci.http.prepare_content("application/json")
  48         luci.http.write_json(rv)
  49 end