--
-- (C) 2013-23 - ntop.org
--
local dirs = ntop.getDirs()
package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path

require "lua_utils"
require "flow_utils"
require "voip_utils"

local shaper_utils

local format_utils = require "format_utils"
local have_nedge = ntop.isnEdge()
local nf_config = nil
local alert_consts = require "alert_consts"
local alert_utils = require "alert_utils"
local alert_entities = require "alert_entities"
local dscp_consts = require "dscp_consts"
local tag_utils = require "tag_utils"
local flow_risk_utils = require "flow_risk_utils"
local flow_consts = require "flow_consts"
local template = require "template_utils"
local categories_utils = require "categories_utils"
local protos_utils = require("protos_utils")
local discover = require("discover_utils")
local http_utils = require("http_utils")
local json = require("dkjson")
local page_utils = require("page_utils")
local icmp_utils = require("icmp_utils")

if ntop.isPro() then
    package.path = dirs.installdir .. "/scripts/lua/pro/modules/?.lua;" .. package.path
    shaper_utils = require("shaper_utils")

    if ntop.isnEdge() then
        package.path = dirs.installdir .. "/scripts/lua/pro/nedge/modules/system_config/?.lua;" .. package.path
        nf_config = require("nf_config")
    end
end

function formatASN(v, ip)
   local asn

   if((v == nil) or (v == 0)) then
      asn = "&nbsp;"
   elseif not isEmptyString(ip) then
      local as_name = ntop.getASName(ip)
      local label = v .. " (" .. (as_name or "") .. ")"
      asn = "<A HREF=\"" .. ntop.getHttpPrefix() .. "/lua/hosts_stats.lua?asn=" .. v .. "\">" .. label .. "</A>"
   end
   
   print("<td>" .. asn .. "</td>\n")
end

local function colorNotZero(v)
   if (v == 0) then
      return ("0")
   else
      return ('<span style="color: red">' .. formatValue(v) .. "</span>")
   end
end

local function draw_graph(iec, total, mapping)
    local nodes = {}
    local nodes_id = {}

    -- tprint(iec)

    for k, v in pairs(iec) do
        local keys = split(k, ",")

        nodes[keys[1]] = true
        nodes[keys[2]] = true
    end

    print [[
      <div style="width:100%; height:30vh; " id="myiecflow"></div>

  <script type="application/javascript">
      var nodes = null;
      var edges = null;
      var network = null;

      function draw() {
        // create people.
        // value corresponds with the age of the person
        nodes = [
]]
    local i = 1
    for k, _ in pairs(nodes) do
        local label

        if (mapping == nil) then
            label = iec104_typeids2str(tonumber(k))
        else
            label = mapping[tonumber(k)]
        end

        print("{ id: " .. i .. ", label: \"" .. label .. "\" },\n")
        nodes_id[k] = i
        i = i + 1
    end

    print [[
   ];

        // create connections between people
        // value corresponds with the amount of contact between two people
        edges = [
]]

    local uni = {}
    local bi = {}

    for k, v in pairs(iec) do
        local keys = split(k, ",")

        if (iec[keys[2] .. "," .. keys[1]] == nil) then
            uni[k] = v
        else
            if (keys[2] < keys[1]) then
                bi[keys[2] .. "," .. keys[1]] = v
            else
                bi[keys[1] .. "," .. keys[2]] = v
            end
        end
    end

    for k, v in pairs(uni) do
        local keys = split(k, ",")
        local label = string.format("%.3f %%", (v * 100) / total)

        nodes[keys[1]] = true
        nodes[keys[2]] = true

        print("{ from: " .. nodes_id[keys[1]] .. ", to: " .. nodes_id[keys[2]] .. ", value: " .. v .. ", title: \"" ..
                  label .. "\", arrows: \"to\" },\n")
    end

    for k, v in pairs(bi) do
        local keys = split(k, ",")
        local label = string.format("%.3f %%", (v * 100) / total)

        nodes[keys[1]] = true
        nodes[keys[2]] = true

        print("{ from: " .. nodes_id[keys[1]] .. ", to: " .. nodes_id[keys[2]] .. ", value: " .. v .. ", title: \"" ..
                  label .. "\", arrows: \"to,from\" },\n")
    end

    print [[
        ];

        // Instantiate our network object.
        var container = document.getElementById("myiecflow");
        var data = {
          nodes: nodes,
          edges: edges,
        };
        var options = {
          autoResize: true,
          nodes: {
            shape: "dot",
            scaling: {
              label: {
                min: 2,
                max: 80,
              },
            },
          },
          edges: {
              width: 0.15,
              color: { inherit: "from" },
              smooth: {
                  type: "continuous",
                  roundness: 0
              },
          },
          physics: {
              barnesHut: {
                  springConstant: 0,
                  avoidOverlap: 0.3,
                  gravitationalConstant: -1000,
                  damping: 0.65,
                  centralGravity: 0
              },
              stabilization: {
                  onlyDynamicEdges: false
              }
          },
        };
        network = new vis.Network(container, data, options);
      }

draw();


    </script>
       ]]
end

local function ja3url(what, safety, label)
    if (what == nil) then
        print("&nbsp;")
    else
        print(format_external_link("sslbl.abuse.ch/ja3-fingerprints/" .. what .. "/", what, false, "https"))

        if ((safety ~= nil) and (safety ~= "safe")) then
            print(
                ' [ <i class="fas fa-exclamation-triangle" aria-hidden=true style="color: orange;"></i> <A HREF=https://en.wikipedia.org/wiki/Cipher_suite>' ..
                    capitalize(safety) .. ' Cipher</A> ]')
        end
    end
end

sendHTTPContentTypeHeader('text/html')

warn_shown = 0

local alert_banners = {}

if isAdministrator() then
    if _POST["custom_hosts"] and _POST["l7proto"] then
        local proto_id = tonumber(_POST["l7proto"])
        local proto_name = interface.getnDPIProtoName(proto_id)

        if protos_utils.addAppRule(proto_name, {
            match = "host",
            value = _POST["custom_hosts"]
        }) then
            local info = ntop.getInfo()

            alert_banners[#alert_banners + 1] = {
                type = "success",
                text = i18n("custom_categories.protos_reboot_necessary", {
                    product = info.product
                })
            }
        else
            alert_banners[#alert_banners + 1] = {
                type = "danger",
                text = i18n("flow_details.could_not_add_host_to_category", {
                    host = _POST["custom_hosts"],
                    category = proto_name
                })
            }
        end
    elseif _POST["custom_hosts"] and _POST["category"] then
        local lists_utils = require("lists_utils")
        local category_id = tonumber(split(_POST["category"], "cat_")[2])

        if categories_utils.addCustomCategoryHost(category_id, _POST["custom_hosts"]) then
            lists_utils.reloadLists()
            local label = interface.getnDPICategoryName(category_id)

            alert_banners[#alert_banners + 1] = {
                type = "success",
                text = i18n("flow_details.host_successfully_added_to_category", {
                    host = _POST["custom_hosts"],
                    category = (i18n("ndpi_categories." .. label) or label),
                    url = ntop.getHttpPrefix() .. "/lua/admin/edit_categories.lua?l7proto=" .. category_id
                })
            }
        else
            local label = interface.getnDPICategoryName(category_id)

            alert_banners[#alert_banners + 1] = {
                type = "danger",
                text = i18n("flow_details.could_not_add_host_to_category", {
                    host = _POST["custom_hosts"],
                    category = (i18n("ndpi_categories." .. label) or label)
                })
            }
        end
    end
end

local function printAddCustomHostRule(full_url)
    if not isAdministrator() then
        return
    end

    local categories = interface.getnDPICategories()
    local protocols = interface.getnDPIProtocols()
    local short_url = categories_utils.getSuggestedHostName(full_url)

    -- Fill the category dropdown
    local cat_select_dropdown = '<select id="flow_target_category" class="form-select">'

    for cat_name, cat_id in pairsByKeys(categories, asc_insensitive) do
        cat_select_dropdown = cat_select_dropdown .. [[<option value="cat_]] .. cat_id .. [[">]] ..
                                  (i18n("ndpi_categories." .. cat_name) or cat_name) .. [[</option>]]
    end
    cat_select_dropdown = cat_select_dropdown .. "</select>"

    -- Fill the application dropdown
    local app_select_dropdown = '<select id="flow_target_app" class="form-select" style="display:none">'

    for proto_name, proto_id in pairsByKeys(protocols, asc_insensitive) do
        app_select_dropdown = app_select_dropdown .. [[<option value="]] .. proto_id .. [[">]] .. proto_name ..
                                  [[</option>]]
    end
    app_select_dropdown = app_select_dropdown .. "</select>"

    -- Put a note if the URL is already assigned to another customized category
    local existing_note = ""
    local matched_category = ntop.matchCustomCategory(full_url)

    existing_note = "<br>" .. i18n("flow_details.existing_rules_note", {
        name = i18n("custom_categories.apps_and_categories"),
        url = ntop.getHttpPrefix() .. "/lua/admin/edit_categories.lua"
    })

    if matched_category ~= nil then
        local cat_name = interface.getnDPICategoryName(matched_category)

        existing_note = existing_note .. "<br><br>" .. i18n("details.note") .. ": " ..
                            i18n("custom_categories.similar_host_found", {
                host = page_utils.safe_html(full_url),
                category = (i18n("ndpi_categories." .. cat_name) or cat_name)
            }) .. "<br><br>"
    end

    local rule_type_selection = ""
    if protos_utils.hasProtosFile() then
        rule_type_selection = i18n("flow_details.rule_type") .. ":" ..
                                  [[<br><select id="new_rule_type" onchange="new_rule_dropdown_select(this)" class="form-select">
            <option value="application">]] .. i18n("application") .. [[</option>
            <option value="category" selected>]] .. i18n("category") .. [[</option>
         </select><br>]]
    end

    print(template.gen("modal_confirm_dialog.html", {
        dialog = {
            id = "add_to_customized_categories",
            action = "addToCustomizedCategories()",
            custom_alert_class = "",
            custom_dialog_class = "dialog-body-full-height",
            title = i18n("custom_categories.custom_host_category"),
            message = rule_type_selection .. i18n("custom_categories.select_url_category") .. "<br>" ..
                cat_select_dropdown .. app_select_dropdown .. "<br>" ..
                i18n("custom_categories.the_following_url_will_be_added") ..
                '<br><input id="categories_url_add" class="form-control" required value="' .. short_url .. '">' ..
                existing_note,
            confirm = i18n("custom_categories.add"),
            cancel = i18n("cancel")
        }
    }))

    print(' <a href="#" onclick="$(\'#add_to_customized_categories\').modal(\'show\'); return false;"><i title="' ..
              i18n("custom_categories.add_to_categories") .. '" class="fas fa-plus"></i></a>')

    print [[<script>
   function addToCustomizedCategories() {
      var is_category = ($("#new_rule_type").val() == "category");
      var target_value = is_category ? $("#flow_target_category").val() : $("#flow_target_app").val();;
      var target_url = NtopUtils.cleanCustomHostUrl($("#categories_url_add").val());

      if(!target_value || !target_url)
         return;

      var params = {};
      params.custom_hosts = target_url;
      params.csrf = "]]
    print(ntop.getRandomCSRFValue())
    print [[";
      if(is_category)
         params.category = target_value;
      else
         params.l7proto = target_value;

      NtopUtils.paramsToForm('<form method="post"></form>', params).appendTo('body').submit();
   }

   function new_rule_dropdown_select(dropdown) {
      if($(dropdown).val() == "category") {
         $("#flow_target_category").show();
         $("#flow_target_app").hide();
      } else {
         $("#flow_target_category").hide();
         $("#flow_target_app").show();
      }
   }
</script>]]
end

local function displayContainer(cont, label)
    print(label)

    if not isEmptyString(cont["id"]) then
        -- short 12-chars UUID as in docker
        print("<tr><th width=30%>" .. i18n("containers_stats.container") .. "</th><td colspan=2><a href='" ..
                  ntop.getHttpPrefix() .. "/lua/flows_stats.lua?container=" .. cont["id"] .. "'>" ..
                  format_utils.formatContainer(cont) .. "</a></td></tr>\n")
    end

    local k8s_name = cont["k8s.name"]
    local k8s_pod = cont["k8s.pod"]
    local k8s_ns = cont["k8s.ns"]

    local k8s_rows = {}
    if not isEmptyString(k8s_name) then
        k8s_rows[#k8s_rows + 1] = {i18n("flow_details.k8s_name"), k8s_name}
    end
    if not isEmptyString(k8s_pod) then
        k8s_rows[#k8s_rows + 1] = {i18n("flow_details.k8s_pod"),
                                   '<a href="' .. ntop.getHttpPrefix() .. '/lua/containers_stats.lua?pod=' .. k8s_pod ..
            '">' .. k8s_pod .. '</a>'}
    end
    if not isEmptyString(k8s_ns) then
        k8s_rows[#k8s_rows + 1] = {i18n("flow_details.k8s_ns"), k8s_ns}
    end

    for i, row in ipairs(k8s_rows) do
        local header = ''

        if i == 1 then
            header = "<th width=30% rowspan=" .. (#k8s_rows) .. ">" .. i18n("flow_details.k8s") .. "</th>"
        end

        print("<tr>" .. header .. "<th>" .. row[1] .. "</th><td>" .. row[2] .. "</td></tr>\n")
    end

    local docker_name = cont["docker.name"]

    local docker_rows = {}
    if not isEmptyString(docker_name) then
        docker_rows[#docker_rows + 1] = {i18n("flow_details.docker_name"), docker_name}
    end

    for i, row in ipairs(docker_rows) do
        local header = ''

        if i == 1 then
            header = "<th width=30% rowspan=" .. (#docker_rows) .. ">" .. i18n("flow_details.docker") .. "</th>"
        end

        print("<tr>" .. header .. "<th>" .. row[1] .. "</th><td>" .. row[2] .. "</td></tr>\n")
    end
end

local function displayProc(proc, label)
    if (proc.pid == 0) then
        return
    end

    print(label)

    print("<tr><th width=30%>" .. i18n("flow_details.user_name") .. "</th><td colspan=2><A HREF=\"" ..
              ntop.getHttpPrefix() .. "/lua/username_details.lua?uid=" .. proc.uid .. "&username=" .. proc.user_name ..
              "&" .. hostinfo2url(flow, "cli") .. "\">" .. proc.user_name .. "</A></td></tr>\n")

    print("<tr><th width=30%>" .. i18n("flow_details.process_pid_name") .. "</th><td colspan=2><A HREF=\"" ..
              ntop.getHttpPrefix() .. "/lua/process_details.lua?pid=" .. proc.pid .. "&pid_name=" .. proc.name .. "&" ..
              hostinfo2url(flow, "srv") .. "\">" .. proc.name .. "</a> ")
    if proc.pid then
        print("[" .. i18n("flow_details.process_pid") .. ": " .. proc.pid .. "]")
    end
    if not isEmptyString(proc.pkg_name) then
        print("  [" .. i18n("flow_details.process_package") .. ": " .. proc.pkg_name .. "] ")
    end

    if not isEmptyString(proc.father_name) then
        print(" " .. i18n("flow_details.son_of_father_process") .. " <a href ='" .. ntop.getHttpPrefix() ..
                  "/lua/process_details.lua?pid=" .. proc.father_pid .. "&pid_name=" .. proc.father_name .. "&" ..
                  hostinfo2url(flow, "srv") .. "'>" .. proc.father_name .. "</a> ")
        if proc.father_pid then
            print(i18n("flow_details.process_pid") .. ": " .. proc.father_pid)
        end
        if not isEmptyString(proc.father_pkg_name) then
            print(" " .. i18n("flow_details.process_package") .. ": " .. proc.father_pkg_name)
        end
    end
    print("</td></tr>")

    if ((proc.actual_memory ~= nil) and (proc.actual_memory > 0)) then
        print("<tr><th width=30%>" .. i18n("graphs.actual_memory") .. "</th><td colspan=2>" ..
                  bytesToSize(proc.actual_memory * 1024) .. "</td></tr>\n")
        print("<tr><th width=30%>" .. i18n("graphs.peak_memory") .. "</th><td colspan=2>" ..
                  bytesToSize(proc.peak_memory * 1024) .. "</td></tr>\n")
    end
end

page_utils.print_header_and_set_active_menu_entry(page_utils.menu_entries.flow_details)
dofile(dirs.installdir .. "/scripts/lua/inc/menu.lua")

printMessageBanners(alert_banners)

if not table.empty(alert_banners) then
    print("<br>")
end

print(
    '<div style=\"display:none;\" id=\"flow_purged\" class=\"alert alert-danger\"><i class="fas fa-exclamation-triangle fa-lg"></i>&nbsp;' ..
        i18n("flow_details.now_purged") .. '</div>')

throughput_type = getThroughputType()

local flow_key = _GET["flow_key"]
local flow_hash_id = _GET["flow_hash_id"]

flow = interface.findFlowByKeyAndHashId(tonumber(flow_key), tonumber(flow_hash_id))

local ifid = interface.name2id(ifname)
local label = getFlowLabel(flow, nil, nil, nil, nil, nil, false)
local title = i18n("flow") .. ": " .. label
local url = ntop.getHttpPrefix() .. "/lua/flow_details.lua"

page_utils.print_navbar(title, url, {{
    active = true,
    page_name = "overview",
    label = i18n("overview")
}})

if (flow == nil) then
    print('<div class=\"alert alert-danger\"><i class="fas fa-exclamation-triangle fa-lg"></i> ' ..
              i18n("flow_details.flow_cannot_be_found_message") .. ' ' .. purgedErrorString() .. '</div>')
else
    if isAdministrator() then
        if (_POST["drop_flow_policy"] == "true") then
            interface.dropFlowTraffic(tonumber(flow_key))
            flow["verdict.pass"] = false
        end
    end

    ifstats = interface.getStats()
    print("<table class=\"table table-bordered table-striped\">\n")
    if ifstats.vlan and flow["vlan"] > 0 then
        print("<tr><th width=30%>")
        print(i18n("details.vlan_id"))
        print("</th><td colspan=2>" .. getFullVlanName(flow["vlan"]) .. "</td></tr>\n")
    end

    print("<tr><th width=30%>" .. i18n("flow_details.flow_peers_client_server") .. "</th><td colspan=2>" ..
              getFlowLabel(flow, true, not ifstats.isViewed --[[ don't add hyperlinks, viewed interface don't have hosts --]] ,
            nil, nil, false --[[ add flags ]] ))

    if (flow.periodic_flow) then
        print(" <span class='badge bg-warning text-dark'>" .. i18n("periodic_flow") .. "</span>")
    end

    print("</td></tr>\n")

    print("<tr><th width=30%>" .. i18n("protocol") .. " / " .. i18n("application") .. "</th>")
    if ((ifstats.inline and flow["verdict.pass"]) or (flow.vrfId ~= nil)) then
        print("<td>")
    else
        print("<td colspan=2>")
    end

    if (flow["verdict.pass"] == false) then
        print("<strike>")
    end
    print(flow["proto.l4"] .. " / ")

    if (flow["proto.ndpi_id"] == -1) then
        print(flow["proto.ndpi"])
    else
        print("<A HREF=\"" .. ntop.getHttpPrefix() .. "/lua/")
        if ((flow.client_process ~= nil) or (flow.server_process ~= nil)) then
            print("s")
        end
        print("flows_stats.lua?application=" .. flow["proto.ndpi"] .. "\">")
        print(getApplicationLabel(flow["proto.ndpi"], 32) .. "</A> ")

        print("(<A HREF=\"" .. ntop.getHttpPrefix() .. "/lua/")
        print("flows_stats.lua?category=" .. flow["proto.ndpi_cat"] .. "\">")
        print(getCategoryLabel(flow["proto.ndpi_cat"], interface.getnDPICategoryId(flow["proto.ndpi_cat"])) .. "</A>")
        if (flow["proto.ndpi_cat_file"]) then
            print(" @ " .. flow["proto.ndpi_cat_file"])
        end
        print(") " .. formatBreed(flow["proto.ndpi_breed"], flow["proto.is_encrypted"]))

        if (flow["proto.ndpi_address_family"] ~= nil) then
            print(" [" .. i18n("network") .. ": " .. flow["proto.ndpi_address_family"] .. "]")
        end

        if (flow.confidence) and (not isEmptyString(flow.confidence)) then
            print(" [" .. i18n("ndpi_confidence") .. ": " .. format_confidence_badge(flow.confidence) .. "]")
        end

        if (flow.rtp_stream_type ~= nil) then
	   print(" [ " .. getRTPInfo(flow) .. " ]")
        end
    end

    if (flow["verdict.pass"] == false) then
        print("</strike>")
    end
    historicalProtoHostHref(ifid, flow["cli.ip"], flow["proto.l4"], flow["proto.ndpi_id"],
        page_utils.safe_html(flow["protos.tls.certificate"] or ''))

    if ((flow["protos.tls_version"] ~= nil) and (flow["protos.tls_version"] ~= 0)) then
        local tls_version_name = ntop.getTLSVersionName(flow["protos.tls_version"])

        if isEmptyString(tls_version_name) then
            print(" [ TLS" .. flow["protos.tls_version"] .. " ]")
        else
            print(" [ " .. tls_version_name .. " ]")
        end
        if (tonumber(flow["protos.tls_version"]) < 771) then
            print(' <i class="fas fa-exclamation-triangle" aria-hidden=true style="color: orange;"></i> ')
            print(i18n("flow_details.tls_old_protocol_version"))
        end
    end

    if (ifstats.inline) then
        if (flow["verdict.pass"]) then
            print('<form class="form-inline float-right" style="margin-bottom: 0px;" method="post">')
            print('<input type="hidden" name="drop_flow_policy" value="true">')
            print('<button type="submit" class="btn btn-secondary btn-sm"><i class="fas fa-ban"></i> ' ..
                      i18n("flow_details.drop_flow_traffic_btn") .. '</button>')
            print('<input id="csrf" name="csrf" type="hidden" value="' .. ntop.getRandomCSRFValue() .. '" />\n')
            print('</form>')
        end
    end
    print('</td>')

    if (flow.vrfId ~= nil) then
        print("<td><b> <A HREF=https://en.wikipedia.org/wiki/Virtual_routing_and_forwarding>VRF</A> Id</b> " ..
                  flow.vrfId .. "</td>")
    end
    print("</tr>\n")

    if (ntop.isPro() and ifstats.inline and (flow["shaper.cli2srv_ingress"] ~= nil)) then
        local host_pools_nedge = require("host_pools_nedge")
        print("<tr><th width=30% rowspan=2>" .. i18n("flow_details.flow_shapers") .. "</th>")
        c = flowinfo2hostname(flow, "cli")
        s = flowinfo2hostname(flow, "srv")

        if flow["cli.pool_id"] ~= nil then
            c = c .. " (<a href='" .. host_pools_nedge.getUserUrl(flow["cli.pool_id"]) .. "'>" ..
                    host_pools_nedge.poolIdToUsername(flow["cli.pool_id"]) .. "</a>)"
        end

        if flow["srv.pool_id"] ~= nil then
            s = s .. " (<a href='" .. host_pools_nedge.getUserUrl(flow["srv.pool_id"]) .. "'>" ..
                    host_pools_nedge.poolIdToUsername(flow["srv.pool_id"]) .. "</a>)"
        end

        local shaper = shaper_utils.nedge_shaper_id_to_shaper(flow["shaper.cli2srv_egress"])
        print("<td nowrap>" .. c .. "</td><td>" .. shaper.icon .. " " .. shaper.text .. "</td></tr>")

        local shaper = shaper_utils.nedge_shaper_id_to_shaper(flow["shaper.cli2srv_ingress"])
        print("<td nowrap>" .. s .. "</td><td>" .. shaper.icon .. " " .. shaper.text .. "</td></tr>")
        print("</tr>")

        if flow["cli.pool_id"] ~= nil and flow["srv.pool_id"] ~= nil then
            print("<tr><th width=30% rowspan=2>" .. i18n("flow_details.flow_quota") .. "</th>")
            print("<td>" .. c .. "</td>")
            print("<td id='cli2srv_quota'>")
            printFlowQuota(ifstats.id, flow, true --[[ client ]] )
            print("</td></tr>")
            print("<td nowrap>" .. s .. "</td>")
            print("<td id='srv2cli_quota'>")
            printFlowQuota(ifstats.id, flow, false --[[ server ]] )
            print("</td>")
            print("</tr>")
        end

        -- ENABLE MARKER DEBUG
        if ntop.isnEdge() and false then
            print("<tr><th width=30%>" .. i18n("flow_details.flow_marker") .. "</th>")
            print("<td colspan=2>" .. nf_config.formatMarker(flow["marker"]) .. "</td>")
            print("</tr>")
        end

        local alert_info = flow2alertinfo(flow)
        local forbidden_proto = flow["proto.ndpi_id"]
        local forbidden_peer = nil

        if alert_info then
            forbidden_proto = alert_info["devproto_forbidden_id"] or forbidden_proto
            forbidden_peer = alert_info["devproto_forbidden_peer"]
        end

        local cli_mac = flow["cli.mac"] and interface.getMacInfo(flow["cli.mac"])
        local srv_mac = flow["srv.mac"] and interface.getMacInfo(flow["srv.mac"])
        local cli_show = (cli_mac and cli_mac.location == "lan" and flow["cli.pool_id"] == 0)
        local srv_show = (srv_mac and srv_mac.location == "lan" and flow["srv.pool_id"] == 0)
        local num_rows = 0

        if cli_show then
            num_rows = num_rows + 1
        end
        if srv_show then
            num_rows = num_rows + 1
        end

        if (num_rows > 0) then
            print("<tr><th width=30% rowspan=" .. num_rows .. ">" .. i18n("device_protocols.device_protocol_policy") ..
                      "</th>")

            if (cli_show) then
                print("<td>" .. i18n("device_protocols.devtype_as_proto_client", {
                    devtype = discover.devtype2string(flow["cli.devtype"]),
                    proto = interface.getnDPIProtoName(forbidden_proto)
                }) .. "</td>")
                print("<td><a href=\"" .. getDeviceProtocolPoliciesUrl("device_type=" .. flow["cli.devtype"]) ..
                          "&l7proto=" .. forbidden_proto .. "\">")
                print(i18n(ternary(forbidden_peer ~= "cli", "allowed", "forbidden")))
                print("</a></td></tr><tr>")
            end

            if (srv_show) then
                print("<td>" .. i18n("device_protocols.devtype_as_proto_server", {
                    devtype = discover.devtype2string(flow["srv.devtype"]),
                    proto = interface.getnDPIProtoName(forbidden_proto)
                }) .. "</td>")
                print("<td><a href=\"" .. getDeviceProtocolPoliciesUrl("device_type=" .. flow["srv.devtype"]) ..
                          "&l7proto=" .. forbidden_proto .. "\">")
                print(i18n(ternary(forbidden_peer ~= "srv", "allowed", "forbidden")))
                print("</a></td></tr><tr>")
            end
        end
    end

    print("<tr><th width=33%>" .. i18n("details.first_last_seen") .. "</th><td nowrap width=33%><div id=first_seen>" ..
              formatEpoch(flow["seen.first"]) .. " [" .. secondsToTime(os.time() - flow["seen.first"]) .. " " ..
              i18n("details.ago") .. "]" .. "</div></td>\n")
    print("<td nowrap><div id=last_seen>" .. formatEpoch(flow["seen.last"]) .. " [" ..
              secondsToTime(os.time() - flow["seen.last"]) .. " " .. i18n("details.ago") .. "]" .. "</div></td></tr>\n")

    print("<tr><th width=33%>" .. i18n("details.duration") .. "</th><td nowrap colspan=2<div id=duration>" ..
	  secondsToTime(flow["seen.last"] - flow["seen.first"]) .. "</div></td>\n")

    if flow["bytes"] > 0 then
        print("<tr><th width=30% rowspan=3>" .. i18n("details.total_traffic") .. "</th><td>" .. i18n("total") ..
                  ": <span id=volume>" .. bytesToSize(flow["bytes"]) .. "</span> <span id=volume_trend></span></td>")
        if ((ifstats.type ~= "zmq") and ((flow["proto.l4"] == "TCP") or (flow["proto.l4"] == "UDP")) and
            (flow["goodput_bytes"] > 0)) then
            print("<td><A class=\"ntopng-external-link\" HREF=\"https://en.wikipedia.org/wiki/Goodput\">" ..
                      i18n("details.goodput") ..
                      "</A> <i class=\"fas fa-external-link-alt\"></i> : <span id=goodput_volume>" ..
                      bytesToSize(flow["goodput_bytes"]) .. "</span> (<span id=goodput_percentage>")
            pctg = round(((flow["goodput_bytes"] * 100) / flow["bytes"]), 2)
            if (pctg < 50) then
                pctg = "<font color=red>" .. pctg .. "</font>"
            elseif (pctg < 60) then
                pctg = "<font color=orange>" .. pctg .. "</font>"
            end
            print(pctg .. "")

            print("</span> %) <span id=goodput_volume_trend></span> </td></tr>\n")
        else
            print("<td>&nbsp;</td></tr>\n")
        end

        print(
            "<tr><td nowrap>" .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-right\"></i> " .. i18n("server") ..
                ": <span id=cli2srv>" .. formatPackets(flow["cli2srv.packets"]) .. " / " ..
                bytesToSize(flow["cli2srv.bytes"]) .. "</span> <span id=sent_trend></span></td><td nowrap>" ..
                i18n("client") .. " <i class=\"fas fa-long-arrow-alt-left\"></i> " .. i18n("server") ..
                ": <span id=srv2cli>" .. formatPackets(flow["srv2cli.packets"]) .. " / " ..
                bytesToSize(flow["srv2cli.bytes"]) .. "</span> <span id=rcvd_trend></span></td></tr>\n")

        print("<tr><td colspan=2>")
        cli2srv = round((flow["cli2srv.bytes"] * 100) / flow["bytes"], 0)

        local cli_name = shortHostName(flowinfo2hostname(flow, "cli"))
        local srv_name = shortHostName(flowinfo2hostname(flow, "srv"))

        if (flow["cli.port"] > 0) then
            cli_name = cli_name .. ":" .. flow["cli.port"]
            srv_name = srv_name .. ":" .. flow["srv.port"]
        end
        print('<div class="progress"><div class="progress-bar bg-warning" style="width: ' .. cli2srv .. '%;">' ..
                  cli_name .. '</div><div class="progress-bar bg-success" style="width: ' .. (100 - cli2srv) .. '%;">' ..
                  srv_name .. '</div></div>')
        print("</td></tr>\n")
    end

    if (flow.modbus and (table.len(flow.modbus.registers) > 0)) then
        local rowspan = 3

        if (flow.modbus.num_exceptions > 0) then
            rowspan = 4
        end

        print("<tr><th rowspan=" .. rowspan ..
                  " width=30%><A class='ntopng-external-link' href='https://en.wikipedia.org/wiki/Modbus'>ModbusTCP <i class='fas fa-external-link-alt'></i></A></th>")

        print("<th>" .. i18n("flow_details.modbus_function_codes") .. "</th>")
        print("<th>" .. i18n("flow_details.modbus_registers") .. "</th></tr>")

        print("<tr><td><table width=100% class=\"table table-bordered table-striped\">")
        print("<tr><th>" .. i18n("flow_details.modbus_function") .. "</th><th align=right>" ..
                  i18n("flow_details.modbus_uses") .. "</th></tr>\n")

        for k, v in pairsByValues(flow.modbus.function_codes, rev) do
            print("<tr><th>" .. k .. "</th><td align=right>" .. formatValue(v) .. "</td></tr>\n")
        end

        print("</table></td><td><table width=100% class=\"table table-bordered table-striped\">")
        print("<tr><th>" .. i18n("flow_details.modbus_register") .. "</th><th align=right>" ..
                  i18n("flow_details.modbus_uses") .. "</th></tr>\n")

        for k, v in pairsByValues(flow.modbus.registers, rev) do
            print("<tr><th>" .. k .. "</th><td align=right>" .. formatValue(v) .. "</td></tr>\n")
        end
        print("</table>")

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

        local _mepping = {}
        total = 0

        for k, v in pairs(flow.modbus.function_codes_names) do
            _mepping[tonumber(v)] = k
            total = total + v
        end

        print("<tr><th width=100% colspan=2>" .. i18n("flow_details.modbus_transitions"))
        draw_graph(flow.modbus.function_codes_transitions, total, _mepping)
        print("</th></tr>")

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

        if (flow.modbus.num_exceptions > 0) then
            print("<tr><th>" .. i18n("flow_details.modbus_exceptions") ..
                      "</th><td align=right colspan=2><font color=red>" .. formatValue(flow.modbus.num_exceptions) ..
                      "</font></td></tr>\n")
        end

        print("</tr>")
    end

    if (flow.iec104 and (table.len(flow.iec104.typeid) > 0)) then
        print(
            "<tr><th rowspan=6 width=30%><A class='ntopng-external-link' href='https://en.wikipedia.org/wiki/IEC_60870-5'>IEC 60870-5-104  <i class='fas fa-external-link-alt'></i></A></th><th>" ..
                i18n("flow_details.iec104_mask") .. "</th><td>")

        total = 0
        for k, v in pairsByKeys(flow.iec104.typeid, rev) do
            total = total + v
        end

        print("<table border width=100%>")
        for k, v in pairsByValues(flow.iec104.typeid, rev) do
            local pctg = (v * 100) / total
            local key = iec104_typeids2str(tonumber(k))

            print(string.format("<th>%s</th><td align=right>%.3f %%</td></tr>\n", key, pctg))
        end

        print("</table>\n")
        print("</td></tr>\n")

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

        total = 0
        for k, v in pairsByValues(flow.iec104.typeid_transitions, rev) do
            total = total + v
        end

        print("<tr><th>" .. i18n("flow_details.iec104_transitions"))
        draw_graph(flow.iec104.typeid_transitions, total, nil)
        print("</th><td>")

        print("<table border width=100%>")
        for k, v in pairsByValues(flow.iec104.typeid_transitions, rev) do
            local pctg = (v * 100) / total
            local keys = split(k, ",")
            local key = iec104_typeids2str(tonumber(keys[1]))

            if (keys[1] == keys[2]) then
                key = key .. ' <i class="fas fa-exchange-alt"></i> '
            else
                key = key .. ' <i class="fas fa-long-arrow-alt-right"></i> '
            end

            key = key .. iec104_typeids2str(tonumber(keys[2]))

            print(string.format("<tr><th>%s</th><td align=right>%.3f %%</td></tr>\n", key, pctg))
        end

        print("</table>\n")
        print("</td></tr>\n")

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

        print("<tr><th>" .. i18n("flow_details.iec104_latency") .. "</th><td>")
        if (flow.iec104.ack_time.stddev > flow.iec104.ack_time.average) then
            on = "<font color=red>"
            off = "</font>"
        else
            on = ""
            off = ""
        end
        if ((flow.iec104.ack_time.average > 1000) or (flow.iec104.ack_time.stddev > 1000)) then
            print(string.format("%.3f sec (%s%.3f sec%s)", flow.iec104.ack_time.average / 1000, on,
                (flow.iec104.ack_time.stddev / 1000), off))
        else
            print(string.format("%.3f ms (%s%.3f msec%s)", flow.iec104.ack_time.average, on,
                flow.iec104.ack_time.stddev, off))
        end
        print("</td></tr>\n")

        print("<tr><th>" .. i18n("flow_details.iec104_msg_breakdown") .. "</th><td>")
        local total = flow.iec104.stats.forward_msgs + flow.iec104.stats.reverse_msgs
        local pctg = string.format("%.1f", (flow.iec104.stats.forward_msgs * 100) / total)

        if (flow["srv.port"] == 2404) then
            -- we need to swap directions
            pctg = 100 - pctg
        end

        print('<div class="progress"><div class="progress-bar bg-warning" style="width: ' .. pctg .. '%;">' .. pctg ..
                  '% </div>')
        pctg = 100 - pctg
        print('<div class="progress-bar bg-success" style="width: ' .. pctg .. '%;">' .. pctg .. '% </div></div>')
        -- print(formatValue(flow.iec104.stats.forward_msgs).." RX / "..formatValue(flow.iec104.stats.reverse_msgs).." TX")
        print("</td></tr>\n")

        print("<tr><th>" .. i18n("flow_details.iec104_msg_loss") .. "</th><td>")
        print("<i class=\"fas fa-long-arrow-alt-left\"></i> " .. colorNotZero(flow.iec104.pkt_lost.rx) ..
                  ", <i class=\"fas fa-long-arrow-alt-right\"></i> " .. colorNotZero(flow.iec104.pkt_lost.tx) .. " / ")

        if (flow.iec104.stats.retransmitted_msgs == 0) then
            print("0")
        else
            print(colorNotZero(flow.iec104.stats.retransmitted_msgs))
        end

        print(" Retransmitted")
        print("</td></tr>\n")

        local url = "/lua/rest/v2/get/flow/l7/iec104.lua?flow_key=" .. flow_key .. "&flow_hash_id=" .. flow_hash_id ..
                        "&ifid=" .. ifid
        print("<tr><th>" .. i18n("download") .. "&nbsp;<i class=\"fas fa-download fa-lg\"></i></th><td><A HREF=\"" ..
                  url .. "\" download=\"iec104-" .. flow_key .. ".json\">JSON</A></td></tr>")
    end

    if ((flow.tos.client.ECN ~= 0) or (flow.tos.server.DSCP ~= 0)) then
        print("<tr><th width=30%>" .. i18n("flow_details.tos") .. "</th>")
        print("<td>" .. (dscp_consts.dscp_descr(flow.tos.client.DSCP)) .. " / " ..
                  (dscp_consts.ecn_descr(flow.tos.client.ECN)) .. "</td>")
        print("<td>" .. (dscp_consts.dscp_descr(flow.tos.server.DSCP)) .. " / " ..
                  (dscp_consts.ecn_descr(flow.tos.server.ECN)) .. "</td>")
        print("</tr>")
    end

    if (flow["tcp.nw_latency.client"] ~= nil) then
        local rtt = flow["tcp.nw_latency.client"] + flow["tcp.nw_latency.server"]

        if (rtt > 0) then
            local cli2srv = round(flow["tcp.nw_latency.client"], 3)
            local srv2cli = round(flow["tcp.nw_latency.server"], 3)

            print("<tr><th width=30%>" .. i18n("flow_details.rtt_breakdown") .. "</th><td colspan=2>")
            print(
                '<div class="progress"><div class="progress-bar bg-warning" style="width: ' .. (cli2srv * 100 / rtt) ..
                    '%;">' .. cli2srv .. ' ms (client)</div>')
            print('<div class="progress-bar bg-success" style="width: ' .. (srv2cli * 100 / rtt) .. '%;">' .. srv2cli ..
                      ' ms (server)</div></div>')
            print("</td></tr>\n")

            c = interface.getAddressInfo(flow["cli.ip"])
            s = interface.getAddressInfo(flow["srv.ip"])

            if (not (c.is_private and s.is_private)) then
                -- Inspired by https://gist.github.com/geraldcombs/d38ed62650b1730fb4e90e2462f16125
                print(
                    "<tr><th width=30%><A class='ntopng-external-link' href=\"https://en.wikipedia.org/wiki/Velocity_factor\">" ..
                        i18n("flow_details.rtt_distance") .. " <i class=\"fas fa-external-link-alt\"></i></A></th><td>")
                local c_vacuum_km_s = 299792
                local c_vacuum_mi_s = 186000
                local fiber_vf = .67
                local delta_t = rtt / 1000
                local dd_fiber_km = delta_t * c_vacuum_km_s * fiber_vf
                local dd_fiber_mi = delta_t * c_vacuum_mi_s * fiber_vf

                print(formatValue(toint(dd_fiber_km)) .. " Km</td><td>" .. formatValue(toint(dd_fiber_mi)) .. " Miles")
                print("</td></tr>\n")
            end
        end
    end

    if (flow["tcp.appl_latency"] ~= nil and flow["tcp.appl_latency"] > 0) then
        print("<tr><th width=30%>" .. i18n("flow_details.application_latency") .. "</th><td colspan=2>" ..
                  msToTime(flow["tcp.appl_latency"]) .. "</td></tr>\n")
    end

    if not ntop.isnEdge() then
        if flow["cli2srv.packets"] > 1 and flow["interarrival.cli2srv"] and flow["interarrival.cli2srv"]["max"] > 0 then
            print("<tr><th width=30%")
            if (flow["flow.idle"] == true) then
                print(" rowspan=2")
            end
            print(">" .. i18n("flow_details.packet_inter_arrival_time") .. "</th><td nowrap>" .. i18n("client") ..
                      " <i class=\"fas fa-long-arrow-alt-right\"></i> " .. i18n("server") .. ": ")
            print(msToTime(flow["interarrival.cli2srv"]["min"]) .. " / " ..
                      msToTime(flow["interarrival.cli2srv"]["avg"]) .. " / " ..
                      msToTime(flow["interarrival.cli2srv"]["max"]))
            print("</td>\n")
            if (flow["srv2cli.packets"] < 2) then
                print("<td>&nbsp;")
            else
                print("<td nowrap>" .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-left\"></i> " ..
                          i18n("server") .. ": ")
                print(msToTime(flow["interarrival.srv2cli"]["min"]) .. " / " ..
                          msToTime(flow["interarrival.srv2cli"]["avg"]) .. " / " ..
                          msToTime(flow["interarrival.srv2cli"]["max"]))
            end
            print("</td></tr>\n")
            if (flow["flow.idle"] == true) then
                print("<tr><td colspan=2><i class='fas fa-clock-o'></i> <small>" ..
                          i18n("flow_details.looks_like_idle_flow_message") .. "</small></td></tr>")
            end
        end

        if ((flow["cli2srv.fragments"] + flow["srv2cli.fragments"]) > 0) then
            rowspan = 2
            print("<tr><th width=30% rowspan=" .. rowspan .. ">" .. i18n("flow_details.ip_packet_analysis") .. "</th>")
            print("<th>&nbsp;</th><th>" .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-right\"></i> " ..
                      i18n("server") .. " / " .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-left\"></i> " ..
                      i18n("server") .. "</th></tr>\n")
            print("<tr><th>" .. i18n("details.fragments") .. "</th><td align=right><span id=c2sFrag>" ..
                      formatPackets(flow["cli2srv.fragments"]) .. "</span> / <span id=s2cFrag>" ..
                      formatPackets(flow["srv2cli.fragments"]) .. "</span></td></tr>\n")
        end

        if flow["tcp.seq_problems"] then
            rowspan = 1
            if ((flow["cli2srv.retransmissions"] + flow["srv2cli.retransmissions"]) > 0) then
                rowspan = rowspan + 1
            end
            if ((flow["cli2srv.out_of_order"] + flow["srv2cli.out_of_order"]) > 0) then
                rowspan = rowspan + 1
            end
            if ((flow["cli2srv.lost"] + flow["srv2cli.lost"]) > 0) then
                rowspan = rowspan + 1
            end
            if ((flow["cli2srv.keep_alive"] + flow["srv2cli.keep_alive"]) > 0) then
                rowspan = rowspan + 1
            end

            if rowspan > 1 then
                print("<tr><th width=30% rowspan=" .. rowspan .. ">" .. i18n("flow_details.tcp_packet_analysis") ..
                          "</th>")
                print("<th></th><th>" .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-right\"></i> " ..
                          i18n("server") .. " / " .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-left\"></i> " ..
                          i18n("server") .. "</th></tr>\n")

                if ((flow["cli2srv.retransmissions"] + flow["srv2cli.retransmissions"]) > 0) then
                    print("<tr><th>" .. i18n("details.retransmissions") .. "</th><td align=right><span id=c2sretr>" ..
                              formatPackets(flow["cli2srv.retransmissions"]) .. "</span> / <span id=s2cretr>" ..
                              formatPackets(flow["srv2cli.retransmissions"]) .. "</span></td></tr>\n")
                end
                if ((flow["cli2srv.out_of_order"] + flow["srv2cli.out_of_order"]) > 0) then
                    print("<tr><th>" .. i18n("details.out_of_order") .. "</th><td align=right><span id=c2sOOO>" ..
                              formatPackets(flow["cli2srv.out_of_order"]) .. "</span> / <span id=s2cOOO>" ..
                              formatPackets(flow["srv2cli.out_of_order"]) .. "</span></td></tr>\n")
                end
                if ((flow["cli2srv.lost"] + flow["srv2cli.lost"]) > 0) then
                    print("<tr><th>" .. i18n("details.lost") .. "</th><td align=right><span id=c2slost>" ..
                              formatPackets(flow["cli2srv.lost"]) .. "</span> / <span id=s2clost>" ..
                              formatPackets(flow["srv2cli.lost"]) .. "</span></td></tr>\n")
                end
                if ((flow["cli2srv.keep_alive"] + flow["srv2cli.keep_alive"]) > 0) then
                    print("<tr><th>" .. i18n("details.keep_alive") .. "</th><td align=right><span id=c2skeep_alive>" ..
                              formatPackets(flow["cli2srv.keep_alive"]) .. "</span> / <span id=s2ckeep_alive>" ..
                              formatPackets(flow["srv2cli.keep_alive"]) .. "</span></td></tr>\n")
                end
            end
        end
    end

    if (flow["protos.tls.client_requested_server_name"] ~= nil) then
        print("<tr><th width=30%><i class='fas fa-lock'></i> " .. i18n("flow_details.tls_certificate") .. "</th><td>")
        print(i18n("flow_details.client_requested") .. ":<br>")
        -- TLS, so use https
        print(format_external_link(page_utils.safe_html(flow["protos.tls.client_requested_server_name"]),
            page_utils.safe_html(flow["protos.tls.client_requested_server_name"]), false, "https"))
        if (flow["category"] ~= nil) then
            print(" " .. getCategoryIcon(flow["protos.tls.client_requested_server_name"], flow["category"]))
        end
        historicalProtoHostHref(ifid, flow["cli.ip"], nil, flow["proto.ndpi_id"],
            page_utils.safe_html(flow["protos.tls.client_requested_server_name"] or ''), flow["vlan"])
        printAddCustomHostRule(flow["protos.tls.client_requested_server_name"])
        print("</td>")

        print("<td>")
        if (flow["protos.tls.server_names"] ~= nil) then
            local servers = string.split(flow["protos.tls.server_names"], ",") or {flow["protos.tls.server_names"]}

            print(i18n("flow_details.tls_server_names") .. ":<br>")
            for i, server in ipairs(servers) do
                if i > 1 then
                    print("<br>")
                end

                if starts(server, '*') then
                    print(server)
                else
                    -- TLS, so use https
                    print(format_external_link(server, server, false, "https"))
                end
            end
        end
        print("</td>")
        print("</tr>\n")
    end

    if ((flow["protos.tls.notBefore"] ~= nil) or (flow["protos.tls.notAfter"] ~= nil)) then
        local now = os.time()
        print('<tr><th width=30%>' .. i18n("flow_details.tls_certificate_validity") .. "</th><td colspan=2>")

        if ((flow["protos.tls.notBefore"] > now) or (flow["protos.tls.notAfter"] < now)) then
            print(" <i class=\"fas fa-exclamation-triangle fa-lg\" style=\"color: #f0ad4e;\"></i>")
        end

        print(formatEpoch(flow["protos.tls.notBefore"]))
        print(" - ")
        print(formatEpoch(flow["protos.tls.notAfter"]))
        print("</td></tr>\n")
    end

    if (flow["protos.tls.issuerDN"] ~= nil) then
        print('<tr><th width=30%>TLS issuerDN</A></th><td colspan=2>' .. flow["protos.tls.issuerDN"] .. '</td></tr>\n')
    end

    if (flow["protos.tls.subjectDN"] ~= nil) then
        print('<tr><th width=30%>TLS subjectDN</A></th><td colspan=2>' .. flow["protos.tls.subjectDN"] .. '</td></tr>\n')
    end

    if ((flow["protos.tls.ja3.client_hash"] ~= nil) or (flow["protos.tls.ja3.server_hash"] ~= nil)) then
        print('<tr><th width=30%><A HREF="https://github.com/salesforce/ja3">JA3C / JA3S</A></th><td>')
        if (flow["protos.tls.ja3.client_malicious"]) then
            print('<font color=red><i class="fas fa-ban" title="' ..
                      i18n("alerts_dashboard.malicious_signature_detected") .. '"></i></font> ')
        end

        ja3url(flow["protos.tls.ja3.client_hash"], nil, 'ja3c')
        print("</td><td>")
        if (flow["protos.tls.ja3.server_malicious"]) then
            print('<font color=red><i class="fas fa-ban" title="' ..
                      i18n("alerts_dashboard.malicious_signature_detected") .. '"></i></font> ')
        end

        ja3url(flow["protos.tls.ja3.server_hash"], flow["protos.tls.ja3.server_unsafe_cipher"], 'ja3s')
        -- print(tls_consts.cipher2str(flow["protos.tls.ja3.server_cipher"]))
        print("</td></tr>")
    end

    if (flow["protos.tls.client_alpn"] ~= nil) then
        print(
            '<tr><th width=30%><a href="https://en.wikipedia.org/wiki/Application-Layer_Protocol_Negotiation" data-bs-toggle="tooltip" title="ALPN">TLS ALPN</A></th><td colspan=2>' ..
                page_utils.safe_html(flow["protos.tls.client_alpn"]) .. '</td></tr>\n')
    end

    if (flow["protos.tls.client_tls_supported_versions"] ~= nil) then
        print('<tr><th width=30%><a href="https://tools.ietf.org/html/rfc7301" data-bs-toggle="tooltip">' ..
                  i18n("flow_details.client_tls_supported_versions") .. '</A></th><td colspan=2>' ..
                  page_utils.safe_html(flow["protos.tls.client_tls_supported_versions"]) .. '</td></tr>\n')
    end

    if ((flow["tcp.max_thpt.cli2srv"] ~= nil) and (flow["tcp.max_thpt.cli2srv"] > 0)) then
        print("<tr><th width=30%>" ..
                  '<a class="ntopng-external-link"  data-bs-toggle="tooltip" href="https://en.wikipedia.org/wiki/TCP_tuning">' ..
                  i18n("flow_details.max_estimated_tcp_throughput") ..
                  " <i class=\"fas fa-external-link-alt\"></i></a><td nowrap> " .. i18n("client") ..
                  " <i class=\"fas fa-long-arrow-alt-right\"></i> " .. i18n("server") .. ": ")
        print(bitsToSize(flow["tcp.max_thpt.cli2srv"]))
        print("</td><td> " .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-left\"></i> " .. i18n("server") ..
                  ": ")
        print(bitsToSize(flow["tcp.max_thpt.srv2cli"]))
        print("</td></tr>\n")
    end

    if ((flow["cli2srv.trend"] ~= nil) and false) then
        print("<tr><th width=30%>" .. i18n("flow_details.throughput_trend") .. "</th><td nowrap>" .. flow["cli.ip"] ..
                  " <i class=\"fas fa-long-arrow-alt-right\"></i> " .. flow["srv.ip"] .. ": ")
        print(flow["cli2srv.trend"])
        print("</td><td>" .. flow["cli.ip"] .. " <i class=\"fas fa-long-arrow-alt-left\"></i> " .. flow["srv.ip"] ..
                  ": ")
        print(flow["srv2cli.trend"])
        print("</td></tr>\n")
    end

    local flags = flow["cli2srv.tcp_flags"] or flow["srv2cli.tcp_flags"]

    local json_flags = nil
    if (flags ~= nil and flags == 0) then
        json_flags = json.decode(flow["moreinfo.json"])
        flags = json_flags["CLIENT_TCP_FLAGS"] or json_flags["SERVER_TCP_FLAGS"]
    end

    if ((flags ~= nil) and (flags > 0)) then
        print("<tr><th width=30% rowspan=2>" .. i18n("tcp_flags") .. "</th><td nowrap>" .. i18n("client") ..
                  " <i class=\"fas fa-long-arrow-alt-right\"></i> " .. i18n("server") .. ": ")
        if (json_flags ~= nil) then
            printTCPFlags(json_flags["CLIENT_TCP_FLAGS"])
        else
            printTCPFlags(flow["cli2srv.tcp_flags"])
        end
        print(
            "</td><td nowrap>" .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-left\"></i> " .. i18n("server") ..
                ": ")
        if (json_flags ~= nil) then
            printTCPFlags(json_flags["SERVER_TCP_FLAGS"])
        else
            printTCPFlags(flow["srv2cli.tcp_flags"])
        end
        print("</td></tr>\n")

        print("<tr><td colspan=2>")

        local flow_msg = ""
        if flow["tcp_reset"] then
            local resetter = ""

            if (hasbit(flow["cli2srv.tcp_flags"], 0x04)) then
                resetter = "client"
            else
                resetter = "server"
            end

            flow_msg = flow_msg .. i18n("flow_details.flow_reset_by_resetter_msg", {
                resetter = resetter
            })
        elseif flow["tcp_closed"] then
            flow_msg = flow_msg .. i18n("flow_details.flow_completed_msg")
        elseif flow["tcp_connecting"] then
            flow_msg = flow_msg .. i18n("flow_details.flow_connecting_msg")
        elseif flow["tcp_established"] then
            flow_msg = flow_msg .. i18n("flow_details.flow_active_msg")
        else
            flow_msg = flow_msg .. " " .. i18n("flow_details.flow_peer_roles_inaccurate_msg")
        end

        print(flow_msg)
        print("</td></tr>\n")
    end

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

    local icmp = flow["icmp"]

    if (icmp ~= nil) then
        local icmp_utils = require "icmp_utils"
        local icmp_label = icmp_utils.get_icmp_label(flow["icmp"]["type"], flow["icmp"]["code"])

        print("<tr><th width=30%>" .. i18n("flow_details.icmp_info") .. "</th><td colspan=2>" .. icmp_label)

        if icmp["unreach"] then
            local unreachable_flow = interface.findFlowByTuple(flow["cli.ip"], flow["srv.ip"], flow["vlan"],
                icmp["unreach"]["dst_port"], icmp["unreach"]["src_port"], icmp["unreach"]["protocol"])

            print("<br>" .. i18n("flow") .. ": ")
            if unreachable_flow then
                print(" <a class='btn btn-sm border ms-1 btn-info' HREF='" .. ntop.getHttpPrefix() ..
                          "/lua/flow_details.lua?flow_key=" .. unreachable_flow["ntopng.key"] .. "&flow_hash_id=" ..
                          unreachable_flow["hash_entry_id"] .. "'><i class='fas fa-search-plus'></i></a>")
                print(" " .. getFlowLabel(unreachable_flow, true, true))
            else
                -- The flow hasn't been found so very likely it is no longer active or it hasn't been seen.
                -- Still print the flow using data found in the original datagram found in the icmp packet
                print(getFlowLabel({
                    ["cli.ip"] = icmp["unreach"]["src_ip"],
                    ["srv.ip"] = icmp["unreach"]["dst_ip"],
                    ["cli.port"] = icmp["unreach"]["src_port"],
                    ["srv.port"] = icmp["unreach"]["dst_port"]
                }, false, false))
            end
            print("")
        end

        print("</td></tr>")
    end

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

    if (isScoreEnabled() and (flow.score.flow_score > 0)) then
        print("\n<tr><th width=30%>" .. i18n("flow_details.flow_score") .. " / " ..
                  i18n("flow_details.flow_score_breakdown") .. "</th><td>" ..
                  format_utils.formatValue(flow.score.flow_score) .. "</td>\n")

        local score_category_network = flow.score.host_categories_total["0"]
        local score_category_security = flow.score.host_categories_total["1"]
        local tot = score_category_network + score_category_security

        score_category_network = (score_category_network * 100) / tot
        score_category_security = 100 - score_category_network

        print(
            '<td><div class="progress"><div class="progress-bar bg-warning" style="width: ' .. score_category_network ..
                '%;">' .. i18n("flow_details.score_category_network"))
        print('</div><div class="progress-bar bg-success" style="width: ' .. score_category_security .. '%;">' ..
                  i18n("flow_details.score_category_security") .. '</div></div></td>\n')
        print("</tr>\n")
    end

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

    local alerts_by_score = {} -- Table used to keep messages ordered by score
    local num_statuses = 0
    local first = true

    for id, _ in pairs(flow["alerts_map"] or {}) do
        local is_predominant = id == flow["predominant_alert"]
        local alert_label = alert_consts.alertTypeLabel(id, true, alert_entities.flow.entity_id)
        local message = alert_label
        local alert_score = ntop.getFlowAlertScore(id)
        local alert_risk = ntop.getFlowAlertRisk(id)

        if alert_score > 0 then
            message = message .. string.format(" [%s: %s]", i18n("score"), format_utils.formatValue(alert_score))
        end

        if not alerts_by_score[alert_score] then
            alerts_by_score[alert_score] = {}
        end
        alerts_by_score[alert_score][#alerts_by_score[alert_score] + 1] = {
            message = message,
            is_predominant = is_predominant,
            alert_id = id,
            alert_label = alert_label,
            alert_risk = alert_risk
        }
        num_statuses = num_statuses + 1
    end
    -- ######################################

    -- Unhandled flow risk as 'fake' alerts with a 'fake' score of zero
    if flow["unhandled_flow_risk"] and table.len(flow["unhandled_flow_risk"]) > 0 then
        local unhandled_risk_score = 0
        local risk = flow["unhandled_flow_risk"]

        for risk_str, risk_id in pairs(risk) do
            if not alerts_by_score[unhandled_risk_score] then
                alerts_by_score[unhandled_risk_score] = {}
            end

            local message = string.format("%s [%s: %s]", risk_str, i18n("score"), i18n("score_not_accounted"))

            alerts_by_score[unhandled_risk_score][#alerts_by_score[unhandled_risk_score] + 1] = {
                message = message,
                is_predominant = false,
                alert_risk = risk_id
            }
            num_statuses = num_statuses + 1
        end
    end

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

    -- Print flow alerts (ordered by score and then alphabetically)
    if num_statuses > 0 then
        -- Prepare a mapping between alert id and check
        local alert_id_to_flow_check = {}
        local checks = require "checks"
        local riskInfo = {}

        local flow_checks = checks.load(ifId, checks.script_types.flow, "flow")
        for flow_check_name, flow_check in pairs(flow_checks.modules) do
            if flow_check.alert_id then
                alert_id_to_flow_check[flow_check.alert_id] = flow_check_name
            end
        end

        if not isEmptyString(flow.riskInfo) then
	   riskInfo = json.decode(flow.riskInfo, 1, nil)
        end

        if (riskInfo ~= nil) then
            for _, score_alerts in pairsByKeys(alerts_by_score, rev) do
                for _, score_alert in pairsByField(score_alerts, "message", asc) do
                    if first then
                        print("<tr><th width=30% rowspan=" .. (num_statuses + 1) .. ">" ..
                                  i18n("flow_details.flow_issues") .. "</th><th>" .. i18n("description") .. "</th><th>" ..
                                  i18n("actions") .. "</th></tr>")
                        first = false
                    end

                    local status_icon = ""

                    local riskLabel = riskInfo[tostring(score_alert.alert_risk)]

                    if (riskLabel ~= nil) then
                        riskLabel = "[" .. shortenString(riskLabel, 64) .. "]"
                    else
                        riskLabel = ""
                    end

                    if score_alert.alert_id then
                        alert_consts.alertTypeIcon(score_alert.alert_id, map_score_to_severity(score_alert.alert_id),
                            'fa-lg')
                    end

                    print(string.format('<tr>'))

                    local msg = string.format('<td>%s %s %s %s</td>', score_alert.message, riskLabel,
                        (score_alert.alert_risk > 0 and flow_risk_utils.get_documentation_link(score_alert.alert_risk)) or
                            '', status_icon or '')
                    print(msg)

                    if score_alert.alert_id then
                        print('<td>')

                        -- Add rules to disable the check
                        print(string.format(
                            '<a href="#alerts_filter_dialog" alert_id=%u alert_label="%s" class="btn btn-sm btn-warning" role="button"><i class="fas fa-bell-slash"></i></a>',
                            score_alert.alert_id, score_alert.alert_label))

                        -- If available, add a cog to configure the check
                        if alert_id_to_flow_check[score_alert.alert_id] then
                            print(string.format(
                                '&nbsp;<a href="%s" class="btn btn-sm btn-info" role="button"><i class="fas fa-cog"></i></a>',
                                alert_utils.getConfigsetURL(alert_id_to_flow_check[score_alert.alert_id], "flow")))
                        end

                        -- Add an anchor to the historical alert
                        if not ifstats.isViewed -- and score_alert.is_predominant 
                        then
                            -- Prepare bounds for the historical alert search.
                            local epoch_begin = flow["seen.first"]
                            -- As this is the page of active flows, it is meaningful to use the current time for the epoch end.
                            -- This will also enable multiple flows with the same tuple to be shown.
                            local epoch_end = os.time()
                            local l7_proto = flow["proto.ndpi_id"] .. tag_utils.SEPARATOR .. "eq"
                            local cli_ip = flow["cli.ip"] .. tag_utils.SEPARATOR .. "eq"
                            local srv_ip = flow["srv.ip"] .. tag_utils.SEPARATOR .. "eq"
                            local cli_port = flow["cli.port"] .. tag_utils.SEPARATOR .. "eq"
                            local srv_port = flow["srv.port"] .. tag_utils.SEPARATOR .. "eq"

                            print(string.format(
                                '&nbsp;<a href="%s/lua/alert_stats.lua?status=historical&page=flow&epoch_begin=%u&epoch_end=%u&l7_proto=%s&cli_ip=%s&cli_port=%s&srv_ip=%s&srv_port=%s" class="btn btn-sm btn-info" role="button"><i class="fas fa-exclamation-triangle"></i></a>',
                                ntop.getHttpPrefix(), epoch_begin, epoch_end, l7_proto, cli_ip, cli_port, srv_ip,
                                srv_port))
                        end

                        print('</td>')
                    else -- These are unhandled alerts, e.g., flow risks for which a check doesn't exist
                        print(string.format('<td></td>'))
                    end

                    print('</tr>')
                end
            end
        end
    end

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

    if (flow.entropy and flow.entropy.client and flow.entropy.server) then
        print(
            "<tr><th width=30%><A class='ntopng-external-link' href=\"https://en.wikipedia.org/wiki/Entropy_(information_theory)\">" ..
                i18n("flow_details.entropy") .. " <i class=\"fas fa-external-link-alt\"></i></A></th>")
        print("<td>" .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-right\"></i> " .. i18n("server") .. ": " ..
                  string.format("%.3f", flow.entropy.client) .. "</td>")
        print("<td>" .. i18n("client") .. " <i class=\"fas fa-long-arrow-alt-left\"></i> " .. i18n("server") .. ": " ..
                  string.format("%.3f", flow.entropy.server) .. "</td>")
        print("</tr>\n")

        if (flow.entropy.icmp ~= nil) then
            print("<tr><th width=30%>" .. i18n("flow_details.icmp_entropy") .. "</th>")
            print("<td colspan=2>" .. i18n("flow_details.icmp_entropy_min_max") .. ": " ..
                      string.format("%.3f", flow.entropy.icmp.min) .. " - " ..
                      string.format("%.3f", flow.entropy.icmp.max) .. " [")
            print(i18n("flow_details.icmp_entropy_diff") .. ": " ..
                      string.format("%.3f", flow.entropy.icmp.max - flow.entropy.icmp.min) .. "]")

            if (icmp_utils.is_suspicious_entropy(flow.entropy.icmp.min, flow.entropy.icmp.max)) then
                print(" <span class=\"badge bg-warning\">" .. i18n("suspicious_payload") .. "</span>")
            end

            print("</td></tr>\n")
        end
    end

    if ((flow.community_id ~= nil) and (flow.community_id ~= "")) then
        print(
            "<tr><th width=30%><A class='ntopng-external-link' href=\"https://github.com/corelight/community-id-spec\">CommunityId <i class=\"fas fa-external-link-alt\"></i></A></th><td colspan=2>" ..
                flow.community_id)
        print_copy_button('community_id', flow.community_id)
        print("</td></tr>\n")
    end

    if ((flow["protos.http.last_url"] ~= nil) and (flow.l7_error_code ~= 0)) then
        print("<tr><th width=30%>" .. i18n("l7_error_code") .. "</th>")
        print("<td colspan=2><span class=\"badge ")

        if ((flow["protos.http.last_url"] ~= nil) and (tonumber(flow.l7_error_code) >= 400)) then
            print("bg-danger")
        else
            print("bg-success")
        end

        print("\">" .. http_utils.getResponseStatusCode(flow.l7_error_code) .. "</td>")
        print("</tr>\n")
    end

    if ((flow.client_process == nil) and (flow.server_process == nil)) then
        print("<tr><th width=30%>" .. i18n("flow_details.actual_peak_throughput") .. "</th><td width=20%>")
        if (throughput_type == "bps") then
            print("<span id='flow-throughput' class='peity'>" .. bitsToSize(8 * flow["throughput_bps"]) ..
                      "</span> <span id=throughput_trend></span>")
        elseif (throughput_type == "pps") then
            print("<span id='flow-throughput' class='peity'>" .. pktsToSize(flow["throughput_bps"]) ..
                      "</span> <span id=throughput_trend></span>")
        end

        if (throughput_type == "bps") then
            print(" / <span id=top-flow-throughput>" .. bitsToSize(8 * flow["top_throughput_bps"]) ..
                      "</span> <span id=top_throughput_trend></span>")
        elseif (throughput_type == "pps") then
            print(" / <span id=top-flow-throughput>" .. pktsToSize(flow["top_throughput_bps"]) ..
                      "</span> <span id=top_throughput_trend></span>")
        end

        print("</td><td><span id=thpt-load-chart>0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0</span>")
        print("</td></tr>\n")
    end

    if ((flow.client_process ~= nil) or (flow.server_process ~= nil)) then
        local epbf_utils = require "ebpf_utils"
        print('<tr><th colspan=3><div id="sprobe"></div>')

        local width = 1024
        local height = 200
        local url =
            ntop.getHttpPrefix() .. "/lua/get_flow_process_tree.lua?flow_key=" .. flow_key .. "&flow_hash_id=" ..
                flow_hash_id
        epbf_utils.draw_flow_processes_graph(width, height, url)

        print('</th></tr>\n')

        if (flow.client_process ~= nil) then
            displayProc(flow.client_process,
                "<tr><th colspan=3>" .. i18n("flow_details.client_process_information") .. "</th></tr>\n")
        end
        if (flow.client_container ~= nil) then
            displayContainer(flow.client_container, "<tr><th colspan=3>" ..
                i18n("flow_details.client_container_information") .. "</th></tr>\n")
        end
        if (flow.server_process ~= nil) then
            displayProc(flow.server_process,
                "<tr><th colspan=3>" .. i18n("flow_details.server_process_information") .. "</th></tr>\n")
        end
        if (flow.server_container ~= nil) then
            displayContainer(flow.server_container, "<tr><th colspan=3>" ..
                i18n("flow_details.server_container_information") .. "</th></tr>\n")
        end
    end

    if (flow["protos.dns.last_query"] ~= nil) then
        local dns_utils = require "dns_utils"

        print("<tr><th width=30%>" .. i18n("flow_details.dns_query") .. "</th><td colspan=2>")

        local dns_info = format_dns_query_info({
            last_query_type = flow["protos.dns.last_query_type"],
            last_return_code = flow["protos.dns.last_return_code"]
        })

        if dns_info["last_query_type"] ~= 0 then
            print(dns_info["last_query_type"] .. " ")
        end

        if dns_info["last_return_code"] ~= 0 then
            print(dns_info["last_return_code"] .. " ")
        end

        if (string.ends(flow["protos.dns.last_query"], "arpa")) then
            print(shortHostName(flow["protos.dns.last_query"]))
        else
            print(format_external_link(page_utils.safe_html(flow["protos.dns.last_query"]),
                page_utils.safe_html(shortHostName(flow["protos.dns.last_query"])), false, "dns"))
        end

        historicalProtoHostHref(ifid, flow["cli.ip"], flow["proto.l4"], flow["proto.ndpi_id"],
            page_utils.safe_html(flow["protos.dns.last_query"] or ''))

        if (flow["category"] ~= nil) then
            print(" " .. getCategoryIcon(flow["protos.dns.last_query"], flow["category"]))
        end

        printAddCustomHostRule(flow["protos.dns.last_query"])

        print("</td></tr>\n")
    end

    if not isEmptyString(flow["protos.ssh.hassh.client_hash"]) or
        not isEmptyString(flow["protos.ssh.hassh.server_hash"]) then
        print("<tr><th><A HREF='https://engineering.salesforce.com/open-sourcing-hassh-abed3ae5044c'>HASSH</A></th><td>")
        print("<b>" .. i18n("client") .. ":</b> " .. hostinfo2detailshref(flow2hostinfo(flow, "cli"), {
            page = "ssh"
        }, flow["protos.ssh.hassh.client_hash"]) .. "</td>")
        print("<td><b>" .. i18n("server") .. ":</b> " .. hostinfo2detailshref(flow2hostinfo(flow, "srv"), {
            page = "ssh"
        }, flow["protos.ssh.hassh.server_hash"]) .. "</a></td>")
        print("</td>")
    end

    if (not isEmptyString(flow["protos.ssh.client_signature"])) then
        print("<tr><th>" .. i18n("flow_details.ssh_signature") .. "</th><td><b>" .. i18n("client") .. ":</b> " ..
                  (flow["protos.ssh.client_signature"] or '') .. "</td><td><b>" .. i18n("server") .. ":</b> " ..
                  (flow["protos.ssh.server_signature"] or '') .. "</td></tr>\n")
    end

    if (not isEmptyString(flow["bittorrent_hash"])) then
        print("<tr><th>" .. i18n("flow_details.bittorrent_hash") ..
                  "</th><td colspan=4><A HREF=\"https://www.google.it/search?q=" .. flow["bittorrent_hash"] .. "\">" ..
                  flow["bittorrent_hash"] .. "</A></td></tr>\n")
    end

    if (flow["protos.http.last_url"] ~= nil) then
        local rowspan = 2
        if (not isEmptyString(flow["protos.http.last_method"])) then
            rowspan = rowspan + 1
        end
        if not have_nedge and flow["protos.http.last_return_code"] and flow["protos.http.last_return_code"] ~= 0 then
            rowspan = rowspan + 1
        end
        if (not isEmptyString(flow["protos.http.last_user_agent"])) then
            rowspan = rowspan + 1
        end
        if (not isEmptyString(flow["protos.http.last_server"])) then
            rowspan = rowspan + 1
        end
        if (not isEmptyString(flow["protos.http.last_return_code"])) then
            rowspan = rowspan + 1
        end

        print("<tr><th width=30% rowspan=" .. rowspan .. ">" .. i18n("http") .. "</th>")
        if (not isEmptyString(flow["protos.http.last_method"])) then
            print(
                "<th>" .. i18n("flow_details.http_method") .. "</th><td>" .. (flow["protos.http.last_method"] or '') ..
                    "</td>")
            print("</tr>")
            print("<tr>")
        end

        -- Adding server name column
        print("<tr><th>" .. i18n("flow_details.server_name") .. "</th><td colspan=2>")
        local s = flowinfo2hostname(flow, "srv")
        if (not isEmptyString(flow["host_server_name"])) then
            s = flow["host_server_name"]
        end

        print(format_external_link(page_utils.safe_html(s), page_utils.safe_html(s), false, "http"))

        if (flow["category"] ~= nil) then
            print(" " .. getCategoryIcon(flow["host_server_name"], flow["category"]))
        end
        -- Adding + with custom host rules next to the server name
        printAddCustomHostRule(s)
        print("</td></tr>\n")

        if (not isEmptyString(flow["protos.http.last_user_agent"])) then
            print("<tr><th>" .. i18n("flow_details.user_agent") .. "</th><td colspan=2>" ..
                      flow["protos.http.last_user_agent"] .. "</td></tr>")
        end

        if (not isEmptyString(flow["protos.http.last_server"])) then
            print(
                "<tr><th>" .. i18n("flow_details.server") .. "</th><td colspan=2>" .. flow["protos.http.last_server"] ..
                    "</td></tr>")
        end

        print("<tr><th>" .. i18n("flow_details.url") .. "</th><td colspan=2>")
        -- if(flow["srv.port"] ~= 80) then print(":"..flow["srv.port"]) end

        local last_url = page_utils.safe_html(flow["protos.http.last_url"])
        local last_url_short = shortenString(last_url, 64)
        local proto = "https"

        if (starts(last_url, "http:") == false) then
            -- Now we need to check if nttp or https is needed
            if (not string.contains(last_url, ":443")) then
                proto = "http"
            end
        end

        print(format_external_link(last_url, last_url_short, false, proto))
        print("</td></tr>\n")

        if not have_nedge and flow["protos.http.last_return_code"] and flow["protos.http.last_return_code"] ~= 0 then
            if (flow["protos.http.last_return_code"] < 400) then
                color = "badge bg-success"
            else
                color = "badge bg-warning"
            end
            print("<tr><th>" .. i18n("flow_details.response_code") .. "</th><td colspan=2><span class='" .. color ..
                      "'>" .. (http_utils.getResponseStatusCode(flow["protos.http.last_return_code"]) or '') ..
                      "</span></td></tr>\n")
        end
    else
        if ((flow["host_server_name"] ~= nil) and (flow["protos.dns.last_query"] == nil)) then
            print("<tr><th width=30%>" .. i18n("flow_details.server_name") .. "</th><td colspan=2>")
            local proto = "http"
            if (starts(flow["proto.ndpi"], "TLS")) then
                proto = "https"
            end
            print(format_external_link(page_utils.safe_html(flow["host_server_name"]),
                page_utils.safe_html(flow["host_server_name"]), false, proto))
            if not isEmptyString(flow["protos.http.server_name"]) then
                printAddCustomHostRule(flow["protos.http.server_name"])
            end
            print("</td></tr>\n")
        end
    end

    if (flow["profile"] ~= nil) then
        print("<tr><th width=30%><A HREF=\"" .. ntop.getHttpPrefix() .. "/lua/pro/admin/edit_profiles.lua\">" ..
                  i18n("flow_details.profile_name") .. "</A></th><td colspan=2><span class='badge bg-primary'>" ..
                  flow["profile"] .. "</span></td></tr>\n")
    end

    if (flow.src_as and flow.src_as ~= 0) or (flow.dst_as and flow.dst_as ~= 0) then
        local asn

        print("<tr>")
        print("<th width=30%>" .. i18n("flow_details.as_src_dst") .. "</th>")

        formatASN(flow.src_as, flow["cli.ip"])
        formatASN(flow.dst_as, flow["srv.ip"])

        print("</tr>\n")
    end

    if (flow.prev_adjacent_as or flow.next_adjacent_as) then
        print("<tr>")
        print("<th width=30%>" .. i18n("flow_details.as_prev_next") .. "</th>")

        formatASN(flow.prev_adjacent_as)
        formatASN(flow.next_adjacent_as)

        print("</tr>\n")
    end

    if (not interface.isPacketInterface()) and (flow["flow_verdict"]) and (tonumber(flow["flow_verdict"]) ~= 0) then
        local flow_verdict_badge = addFlowVerdictBadge(flow["flow_verdict"], true)
        print("<tr><th width=30%>" .. i18n("details.flow_verdict") .. "</th><td colspan=2>" .. flow_verdict_badge ..
                  "</td></tr>\n")
    end

    if (flow["moreinfo.json"] ~= nil) then
        local flow_field_value_maps = require "flow_field_value_maps"
        local info, pos, err = json.decode(flow["moreinfo.json"], 1, nil)
        local isThereSIP = 0
        local isThereRTP = 0

        -- Convert the array to symbolic identifiers if necessary
        local syminfo = {}
        for key, value in pairs(info) do
            key, value = flow_field_value_maps.map_field_value(ifid, key, value)

            local k = rtemplate[tonumber(key)]

            if (k == nil) then
                k = flow_consts.flow_fields_description[tostring(key)]
            end

            if (k ~= nil) then
                syminfo[k] = value
            else
                local nprobe_description = interface.getZMQFlowFieldDescr(key)

                if not isEmptyString(nprobe_description) and nprobe_description ~= key then
                    syminfo[nprobe_description] = value
                else
                    syminfo[key] = value
                end
            end
        end
        info = syminfo

        -- get SIP rows
        if (ntop.isPro() and (flow["proto.ndpi"] == "SIP")) then
            local sip_table_rows = getSIPTableRows(info)
            print(sip_table_rows)

            isThereSIP = isThereProtocol("SIP", info)
            if (isThereSIP == 1) then
                isThereSIP = isThereSIPCall(info)
            end
        end
        info = removeProtocolFields("SIP", info)

        -- get RTP rows
        if (ntop.isPro() and (flow["proto.ndpi"] == "RTP")) then
            local rtp_table_rows = getRTPTableRows(info)
            print(rtp_table_rows)

            -- io.write(flow["proto.ndpi"].."\n")
            isThereRTP = isThereProtocol("RTP", info)
        end
        info = removeProtocolFields("RTP", info)

        local snmpdevice = nil

        if (ntop.isPro() and not isEmptyString(flow["device_ip"])) then
            snmpdevice = flow["device_ip"]
        end

        if ((flow["observation_point_id"] ~= nil) and (flow["observation_point_id"] ~= 0)) then
            local custom_name = getObsPointAlias(flow["observation_point_id"], true, true)

            print("<tr><th>" .. i18n("details.observation_point_id") .. "</th>")
            print("<td colspan=\"2\">" .. custom_name .. "</td></tr>")
        end

        if (snmpdevice ~= nil) then
            local exporter_info_url = ntop.getHttpPrefix() .. "/lua/pro/enterprise/flowdevice_details.lua?ip=" ..
                                          snmpdevice
            print("<tr><th>" .. i18n("details.flow_exporter") .. "</th>")
            print("<td colspan=\"2\">" .. "<a href=" .. exporter_info_url .. ">" .. snmpdevice .. "</a></td></tr>")

            if (flow["in_index"] or flow["out_index"]) then
                if ((flow["in_index"] == flow["out_index"]) and (flow["in_index"] == 0)) then
                    -- nothing to do (they are likely to be not initialized)
                else
                    printFlowSNMPInfo(snmpdevice, flow["in_index"], flow["out_index"])
                end
            end
        end

        local function format_custom_field(key, value, snmpdevice)
            local formatted_value = handleCustomFlowField(key, value, snmpdevice)

            if ((tonumber(formatted_value)) and (math.floor(tonumber(formatted_value)) == 0)) then
                formatted_value = ''
            end

            if (tonumber(formatted_value)) then
                formatted_value = format_high_num_value_for_tables({
                    value = formatted_value
                }, "value")
            end

            return formatted_value
        end

        local num = 0
        for key, value in pairsByKeys(info) do
            if tonumber(key) then
                key = getFlowLabelFromId(key)
            end

            if fieldAlreadyPresent(key, flow) then
                goto continue
            end

            if (num == 0) then
                print("<tr><th colspan=3>" .. i18n("flow_details.additional_flow_elements") .. "</th></tr>\n")
            end

            if (value ~= "" and key ~= "CLIENT_TCP_FLAGS" and key ~= "SERVER_TCP_FLAGS") then
                if type(value) == "table" then
                    print("<tr><th width=30%>" .. getFlowKey(key) .. "</th>")
                    for _, value in pairs(value or {}) do
                        print("<td colspan=1>" .. format_custom_field(key, value, snmpdevice) .. "</td>")
                    end
                    print("</tr>\n")
                else
                    print("<tr><th width=30%>" .. getFlowKey(key) .. "</th><td colspan=2>" ..
                              format_custom_field(key, value, snmpdevice) .. "</td></tr>\n")
                end

            end

            num = num + 1

            ::continue::
        end
    end

    if (flow.flow_payload ~= nil) then
        local idx

        -- Check for HTTP (remove data past response)
        payload = string.reverse(flow.flow_payload)

        idx = string.find(payload, "\n\r\n\r")

        if (idx == nil) then
            payload = flow.flow_payload
        else
            payload = string.reverse(string.sub(payload, idx))
        end

        print(
            "<tr><th width=30%>Payload</th><td colspan=2 style='max-width: 200px; white-space: pre-wrap; word-break: keep-all; font-family: \"courier new\", courier, monospace;font-size: 13px;'>" ..
                payload .. "</td></tr>\n")
    end

    print("</table>\n")
end

local traffic_peity_width = "64"
print [[
<div id="vue-modals">
  <modal-alerts-filter
    :alert="current_alert"
    :page="page"
    @exclude="add_exclude"
    ref="modal_alerts_filter">
  </modal-alerts-filter>
</div>
]]

local cliLabel = ''
local cliValue = ''
local srvLabel = ''
local srvValue = ''
local vlan = 0
local infoDomain = ''
local infoIssuerDN = ''

if flow ~= nil then
    cliLabel = flowinfo2hostname(flow, "cli");

    if cliLabel ~= flow["cli.ip"] then
        cliValue = flow["cli.ip"]
    else
        cliValue = cliLabel
    end

    srvLabel = flowinfo2hostname(flow, "srv");

    if srvLabel ~= flow["srv.ip"] then
        srvValue = flow["srv.ip"]
    else
        srvValue = srvLabel
    end

    if flow["vlan"] and flow["vlan"] > 0 then
        vlan = flow["vlan"]
    end

    if not isEmptyString(flow["suspicious_dga_domain"]) then
        infoDomain = flow["suspicious_dga_domain"]
    elseif not isEmptyString(flow["protos.tls.client_requested_server_name"]) then
        infoDomain = flow["protos.tls.client_requested_server_name"]
    elseif not isEmptyString(flow["host_server_name"]) and hostnameIsDomain(flow["host_server_name"]) then
        infoDomain = flow["host_server_name"]
    end

    if flow["protos.tls.issuerDN"] ~= nil then
        infoIssuerDN = flow["protos.tls.issuerDN"]
    end
end

print [[
<script>
  let VUE_MODALS;
  const pageCsrf = "]]
print(ntop.getRandomCSRFValue())
print [[";

  const cliLabel = "]]
print(cliLabel)
print [[";
  const cliValue = "]]
print(cliValue)
print [["; 
  const srvLabel = "]]
print(srvLabel)
print [[";
  const srvValue = "]]
print(srvValue)
print [[";
  const vlan = ]]
print(vlan)
print [[;
  const infoDomain = "]]
print(infoDomain)
print [[";
  const infoIssuerDN = "]]
print(infoIssuerDN)
print [[";
]]

print [[
  const thptChart = $("#thpt-load-chart").show().peity("line", { width: ]]
print(traffic_peity_width)
print [[, max: null })

        $(`a[href='#alerts_filter_dialog']`).click( function (e) {
            const alert_id = e.target.closest('a').attributes.alert_id.value;
            const alert_label = e.target.closest('a').attributes.alert_label.value;
            const alert = {
              alert_id: { value: alert_id },
              alert_name: alert_label,
              flow: {
                cli_ip: {
                  value: cliValue,
                  label: cliLabel,
                },
                srv_ip: {
                  value: srvValue,
                  label: srvLabel,
                },
                vlan: { value: vlan },
              },
              info: {
                value: infoDomain,
                issuerdn: infoIssuerDN,
              },
            };
            VUE_MODALS.show_modal_alerts_filter(alert);
        });

  function start_modals_vue() {
    let page = 'flow';

    let vue_options = {
            components: {
              'modal-alerts-filter': ntopVue.ModalAlertsFilter,
          },
          /**
           * First method called when the component is created.
           */
          created() {},
          mounted() {},
          data() {
              return {
                  page: page,
                  current_alert: null,
                  i18n: (t) => { return i18n(t); },
              };
          },
          methods: {
            show_modal_alerts_filter: function(alert) {
              this.current_alert = alert;
              this.$refs["modal_alerts_filter"].show();
            },
            add_exclude: async function(params) {
              params.csrf = pageCsrf;
//{"delete_alerts":true,"type":"host","alert_addr": null,"flow_alert_key":"46","csrf":"bd493658564ff3ddcf7d08e9552358df"}
              let url = `${http_prefix}/lua/pro/rest/v2/add/alert/exclusion.lua`;
              try {
                let headers = {
                  'Content-Type': 'application/json'
                };
                await ntopng_utility.http_request(url, { method: 'post', headers, body: JSON.stringify(params) });
                $('a[alert_id=' +  params.flow_alert_key+']').hide();
              } catch(err) {
                console.error(err);
              }
            }
          },
      }; 
      const vue = ntopVue.Vue.createApp(vue_options);
      const vue_app = vue.mount("#vue-modals");
      return vue_app;
  }
  VUE_MODALS = start_modals_vue();
]]

if (flow ~= nil) then
    if (flow["cli2srv.packets"] ~= nil) then
        print("var cli2srv_packets = " .. flow["cli2srv.packets"] .. ";")
    end
    if (flow["srv2cli.packets"] ~= nil) then
        print("var srv2cli_packets = " .. flow["srv2cli.packets"] .. ";")
    end
    if (flow["throughput_" .. throughput_type] ~= nil) then
        print("var throughput = " .. flow["throughput_" .. throughput_type] .. ";")
    end
    print("var bytes = " .. flow["bytes"] .. ";")
    print("var goodput_bytes = " .. flow["goodput_bytes"] .. ";")
end

print [[
function update () {
          $.ajax({
                    type: 'GET',
                    url: ']]
print(ntop.getHttpPrefix())
print [[/lua/flow_stats.lua',
                    data: { ifid: "]]
print(tostring(ifid))
print [[", ]]
if (flow_key ~= nil) then
    print [[flow_key: "]]
    print(string.format("%u", flow_key))
    print [[", ]]
end
print [[flow_hash_id: "]]
print(string.format("%u", flow_hash_id))
print [[", ]]
print [[ },
                    success: function(content) {
                        if(content == "{}") {
   ]]

-- If the flow is already idle, another error message is already shown
if (flow ~= nil) then
    print [[
                          var e = document.getElementById('flow_purged');
                          e.style.display = "block";
   ]]
end

print [[
                        } else {
                        var rsp = jQuery.parseJSON(content);
                        $('#first_seen').html(rsp["seen.first"]);
                        $('#last_seen').html(rsp["seen.last"]);
                        $('#duration').html(rsp["seen.duration"]);
                        $('#volume').html(NtopUtils.bytesToVolume(rsp.bytes));
                        $('#goodput_volume').html(NtopUtils.bytesToVolume(rsp["goodput_bytes"]));
                        pctg = ((rsp["goodput_bytes"]*100)/rsp["bytes"]).toFixed(1);

                        /* 50 is the same threshold specified in FLOW_GOODPUT_THRESHOLD */
                        if(pctg < 50) { pctg = "<font color=red>"+pctg+"</font>"; } else if(pctg < 60) { pctg = "<font color=orange>"+pctg+"</font>"; }

                        $('#goodput_percentage').html(pctg);
                        $('#cli2srv').html(NtopUtils.addCommas(rsp["cli2srv.packets"])+" Pkts / " + NtopUtils.addCommas(NtopUtils.bytesToVolume(rsp["cli2srv.bytes"])));
                        $('#srv2cli').html(NtopUtils.addCommas(rsp["srv2cli.packets"])+" Pkts / " + NtopUtils.addCommas(NtopUtils.bytesToVolume(rsp["srv2cli.bytes"])));
                        $('#flow-throughput').html(rsp.throughput);

                        if(typeof rsp["c2sOOO"] !== "undefined") {
                           $('#c2sOOO').html(NtopUtils.formatPackets(rsp["c2sOOO"]));
                           $('#s2cOOO').html(NtopUtils.formatPackets(rsp["s2cOOO"]));
                           $('#c2slost').html(NtopUtils.formatPackets(rsp["c2slost"]));
                           $('#s2clost').html(NtopUtils.formatPackets(rsp["s2clost"]));
                           $('#c2skeep_alive').html(NtopUtils.formatPackets(rsp["c2skeep_alive"]));
                           $('#s2ckeep_alive').html(NtopUtils.formatPackets(rsp["s2ckeep_alive"]));
                           $('#c2sretr').html(NtopUtils.formatPackets(rsp["c2sretr"]));
                           $('#s2cretr').html(NtopUtils.formatPackets(rsp["s2cretr"]));
                        }
                        if(rsp["cli2srv_quota"]) $('#cli2srv_quota').html(rsp["cli2srv_quota"]);
                        if(rsp["srv2cli_quota"]) $('#srv2cli_quota').html(rsp["srv2cli_quota"]);

                        /* **************************************** */

                        if(cli2srv_packets == rsp["cli2srv.packets"]) {
                           $('#sent_trend').html("<i class=\"fas fa-minus\"></i>");
                        } else {
                           $('#sent_trend').html("<i class=\"fas fa-arrow-up\"></i>");
                        }

                        if(srv2cli_packets == rsp["srv2cli.packets"]) {
                           $('#rcvd_trend').html("<i class=\"fas fa-minus\"></i>");
                        } else {
                           $('#rcvd_trend').html("<i class=\"fas fa-arrow-up\"></i>");
                        }

                        if(bytes == rsp["bytes"]) {
                           $('#volume_trend').html("<i class=\"fas fa-minus\"></i>");
                        } else {
                           $('#volume_trend').html("<i class=\"fas fa-arrow-up\"></i>");
                        }

                        if(goodput_bytes == rsp["goodput_bytes"]) {
                           $('#goodput_volume_trend').html("<i class=\"fas fa-minus\"></i>");
                        } else {
                           $('#goodput_volume_trend').html("<i class=\"fas fa-arrow-up\"></i>");
                        }

                        if(throughput > rsp["throughput_raw"]) {
                           $('#throughput_trend').html("<i class=\"fas fa-arrow-down\"></i>");
                        } else if(throughput < rsp["throughput_raw"]) {
                           $('#throughput_trend').html("<i class=\"fas fa-arrow-up\"></i>");
                           $('#top-flow-throughput').html(rsp["top_throughput_display"]);
                        } else {
                           $('#throughput_trend').html("<i class=\"fas fa-minus\"></i>");
                        } ]]

if (isThereSIP == 1) then
    updatePrintSip()
end
if (isThereRTP == 1) then
    updatePrintRtp()
end
print [[                        cli2srv_packets = rsp["cli2srv.packets"];
                        srv2cli_packets = rsp["srv2cli.packets"];
                        throughput = rsp["throughput_raw"];
                        bytes = rsp["bytes"];

         /* **************************************** */
         // Processes information update, based on the pid

         for (var pid in rsp["processes"]) {
            var proc = rsp["processes"][pid]
            // console.log(pid);
            // console.log(proc);
            if(proc["memory"])           $('#memory_'+pid).html(proc["memory"]);
            if(proc["average_cpu_load"]) $('#average_cpu_load_'+pid).html(proc["average_cpu_load"]);
            if(proc["percentage_iowait_time"]) $('#percentage_iowait_time_'+pid).html(proc["percentage_iowait_time"]);
            if(proc["page_faults"])      $('#page_faults_'+pid).html(proc["page_faults"]);
         }

                        /* **************************************** */

                        let values = thptChart.text().split(",");
                        values.shift();
                        values.push(rsp.throughput_raw);
                        thptChart.text(values.join(",")).change();
                     } }
                   });
                 }

]]

print("setInterval(update,3000);\n")

print [[
</script>
 ]]

dofile(dirs.installdir .. "/scripts/lua/inc/footer.lua")
