modules/freifunk/root/usr/sbin/ff_olsr_test_gw

   1 #!/usr/bin/lua
   2 local STRICT = true -- Only delete metric 0 routes
   3 local PINGCMD = "ping -q -I%s -c3 -w3 '%s' >/dev/null 2>&1"
   4 local PINGTRG = {"google.de", "www.de.debian.org", "eu.kernel.org", "freifunk.net"}
   5 local ROUTECMD = "route del default gw '%s' >/dev/null 2>&1"
   6 local THRESHOLD = 3 -- Maximum number of failed tests before dropping the route
   7
   8 local sys = require "luci.sys"
   9 local uci = require "luci.model.uci".cursor_state()
  10 local section = nil
  11
  12 uci:foreach("olsrd", "LoadPlugin", function(s)
  13         if s.library == "olsrd_dyn_gw_plain.so.0.4" and s.ignore ~= "1" then
  14                 section = s[".name"]
  15         end
  16 end)
  17
  18 local droute = sys.net.defaultroute()
  19 if section and droute then      -- dyn_gw is enabled and we have a defaultroute, test it
  20         local state = false
  21
  22         for _, host in ipairs(PINGTRG) do
  23                 state = state or (sys.call(PINGCMD % {droute.device, host}) == 0)
  24         end
  25
  26         if not state and (not STRICT or tonumber(droute.metric) == 0) then
  27                 local count = tonumber(uci:get("olsrd", section, "noinet_count"))
  28                 if not THRESHOLD or (count and count > THRESHOLD) then
  29                         sys.call(ROUTECMD % droute.gateway:string())
  30                 else
  31                         uci:set("olsrd", section, "noinet_count", (count or 0) + 1)
  32                 end
  33         else
  34                 uci:set("olsrd", section, "noinet_count", "0")
  35         end
  36         uci:save("olsrd")
  37 end