Adds new REST API v2/

Addresses #5269

scripts/lua/rest/v2/get/host/interfaces.lua

@@ -0,0 +1,46 @@
+--
+-- (C) 2013-21 - ntop.org
+--
+
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+require "lua_utils"
+local json = require ("dkjson")
+local rest_utils = require("rest_utils")
+
+--
+-- Retrieves all ntopng interfaces of a given host
+-- Example: curl -u admin:admin -H "Content-Type: application/json" -d '{"host" : "192.168.1.1"}' http://localhost:3000/lua/rest/v2/get/host/interfaces.lua
+--
+-- NOTE: in case of invalid login, no error is returned but redirected to login
+--
+
+local rc = rest_utils.consts.success.ok
+local res = {}
+
+local host_info = url2hostinfo(_GET)
+
+if isEmptyString(host_info["host"]) then
+   rest_utils.answer(rest_utils.consts.err.invalid_args)
+   return
+end
+
+local host_key = hostinfo2hostkey(host_info)
+-- Use the host as key in the response so it will be easier to extend
+-- this endpoint with multiple hosts if necessary
+res[host_key] = {}
+
+for ifid, _ in pairs(interface.getIfNames()) do
+   -- Possibly allowerd interface already enforced by iterator
+   interface.select(ifid)
+   local cur_host_info = interface.getHostInfo(host_key)
+
+   if cur_host_info then
+      -- Host found on the given interface
+      res[host_key][#res[host_key] + 1] = {ifid = interface.getId()}
+   end
+end
+
+rest_utils.answer(rc, res)
+