Possible fix for issue #6962

scripts/lua/rest/v2/get/host/l4/data.lua

@@ -0,0 +1,71 @@
+--
+-- (C) 2013-22 - ntop.org
+--
+
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+require "lua_utils"
+local rest_utils = require("rest_utils")
+
+--
+-- Read list of active hosts
+-- Example: curl -u admin:admin -H "Content-Type: application/json" -d '{"ifid": "1", "host": "192.168.1.1", "vlan": "1"}' http://localhost:3000/lua/rest/v2/get/host/active.lua
+--
+-- NOTE: in case of invalid login, no error is returned but redirected to login
+--
+
+local rc = rest_utils.consts.success.ok
+local rsp = {}
+
+local ifid = _GET["ifid"] or interface.getId()
+local host_ip     = _GET["host"]
+local host_vlan   = _GET["vlan"] or 0
+local host = interface.getHostInfo(host_ip, host_vlan)
+if host then 
+  local total = 0
+  local proto_info = {}
+  local timeseries_not_available = (host["localhost"] == false or host["is_multicast"] == true or host["is_broadcast"] == true)
+
+  -- Calculate total bytes
+  for id, _ in ipairs(l4_keys) do
+    local k = l4_keys[id][2]
+    total = total + (host[k..".bytes.sent"] or 0) + (host[k..".bytes.rcvd"] or 0)
+  end
+
+  -- Getting l4 protocols info
+  for id, _ in ipairs(l4_keys) do
+    local k = l4_keys[id][2]
+    
+    if host[k..".bytes.sent"] or host[k..".bytes.rcvd"] then
+      local proto_stats = {}
+
+      if host[k..".bytes.sent"] then
+        proto_stats["bytes_sent"] = host[k..".bytes.sent"] or 0
+      end
+
+      if host[k..".bytes.rcvd"] then
+        proto_stats["bytes_rcvd"] = host[k..".bytes.rcvd"] or 0
+      end
+
+      proto_stats["protocol"] = l4_keys[id][1] or "" .. " " .. historicalProtoHostHref(ifid, host_ip, l4_keys[id][1], nil, nil, host_vlan, true) or ""
+      proto_stats["total_bytes"] = (proto_stats["bytes_sent"] or 0) + (proto_stats["bytes_rcvd"] or 0)
+      proto_stats["total_percentage"] = round((proto_stats["total_bytes"] * 100) / total, 2)
+
+      if(areHostTimeseriesEnabled(ifId) and ntop.getPref("ntopng.prefs.hosts_ts_creation") == "full") and not timeseries_not_available then -- Check if the host timeseries are enabled
+        proto_stats["historical"] = hostinfo2detailshref(host, {page = "historical", ts_schema = "host:l4protos", l4proto = k}, '<i class="fas fa-chart-area"></i>')
+      end
+
+      if proto_stats["total_bytes"] > 0 then
+        -- Add the stats only if greater then 0
+        proto_info[#proto_info + 1] = proto_stats
+      end
+    end
+  end
+
+  if table.len(proto_info) > 0 then
+    rsp = proto_info
+  end
+end
+
+rest_utils.answer(rc, rsp)