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 ucisec = "ff_olsr_test_gw"
  11 local section = nil
  12
  13 uci:foreach("olsrd", "LoadPlugin", function(s)
  14         if s.library == "olsrd_dyn_gw_plain.so.0.4" and s.ignore ~= "1" then
  15                 section = s[".name"]
  16         end
  17 end)
  18
  19 local droute = sys.net.defaultroute()
  20 if section and droute then      -- dyn_gw is enabled and we have a defaultroute, test it
  21         local state = false
  22
  23         for _, host in ipairs(PINGTRG) do
  24                 state = state or (sys.call(PINGCMD % {droute.device, host}) == 0)
  25         end
  26
  27         if not state and (not STRICT or tonumber(droute.metric) == 0) then
  28                 local count = tonumber(uci:get("olsrd", ucisec, "noinet_count"))
  29                 if not THRESHOLD or (count and count >= THRESHOLD) then
  30                         sys.call(ROUTECMD % droute.gateway:string())
  31                 else
  32                         if not count then
  33                                 uci:set("olsrd", ucisec, "state")
  34                         end
  35                         uci:set("olsrd", ucisec, "noinet_count", (count or 0) + 1)
  36                         uci:save("olsrd")
  37                 end
  38         else
  39                 uci:revert("olsrd", ucisec)
  40         end
  41 end