--
-- (C) 2013-17 - ntop.org
--

dirs = ntop.getDirs()
package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path

require "lua_utils"
sendHTTPHeader('text/html; charset=iso-8859-1')
local json = require("dkjson")

interface.select(ifname)
host_info = url2hostinfo(_GET)

-- #####################################################################

local is_host

if(host_info["host"] ~= nil) then
   -- Show ARP sent/recv breakdown 
   stats = interface.getMacInfo(host_info["host"], host_info["vlan"])
   local arp_sent = stats["arp_requests.sent"] + stats["arp_replies.sent"]
   local arp_rcvd = stats["arp_requests.rcvd"] + stats["arp_replies.rcvd"]

   local breakdown = {}
   breakdown[#breakdown + 1] = {label=i18n("sent"), value=arp_sent}
   breakdown[#breakdown + 1] = {label=i18n("received"), value=arp_rcvd}
   print(json.encode(breakdown, nil))
else
   -- Show ARP stats for interface
   stats = interface.getStats()

   print('<tr><th>'..i18n("graphs.arp_requests").."</th><td align=right>"..formatPackets(stats["arp.requests"]).."</td></tr>")
   print('<tr><th>'..i18n("graphs.arp_replies").."</th><td align=right>"..formatPackets(stats["arp.replies"]).."</td></tr>")
end