Implement remote assistance

- It enables a VPN via n2n
- Remote assistance will be automatically disabled after 1 day
- Optionally it's possible to give admin access to the support

scripts/lua/network_load.lua

@@ -13,6 +13,7 @@ sendHTTPHeader('application/json')
 
 local callback_utils = require("callback_utils")
 local recording_utils = require("recording_utils")
+local remote_assistance = require("remote_assistance")
 
 local function userHasRestrictions()
    local allowed_nets = ntop.getPref("ntopng.user." .. (_SESSION["user"] or "") .. ".allowed_nets")
@@ -139,6 +140,14 @@ function dumpInterfaceStats(interface_name)
 
       res["breed"] = stats["breeds"]
 
+      if remote_assistance.isAvailable() then
+	 if remote_assistance.isEnabled() then
+	    res["remote_assistance"] = {
+	       status = remote_assistance.getStatus(),
+	    }
+	 end
+      end
+
       if recording_utils.isAvailable() then
         if recording_utils.isEnabled(ifstats.id) then
           if recording_utils.isActive(ifstats.id) then