mirror of
https://github.com/ntop/ntopng.git
synced 2026-04-29 15:39:33 +00:00
503 lines
15 KiB
Lua
503 lines
15 KiB
Lua
--
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-- (C) 2019 - ntop.org
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--
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local plugins_utils = {}
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local os_utils = require("os_utils")
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local persistence = require("persistence")
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require "lua_trace"
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local dirs = ntop.getDirs()
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-- enable debug tracing
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local do_trace = false
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plugins_utils.COMMUNITY_SOURCE_DIR = os_utils.fixPath(dirs.scriptdir .. "/plugins")
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plugins_utils.PRO_SOURCE_DIR = os_utils.fixPath(dirs.installdir .. "/pro/scripts/pro_plugins")
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plugins_utils.ENTERPRISE_SOURCE_DIR = os_utils.fixPath(dirs.installdir .. "/pro/scripts/enterprise_plugins")
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-- NOTE: keep in sync with the HTTPServer runtime_dir
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plugins_utils.PLUGINS_RUNTIME_PATH = os_utils.fixPath(dirs.workingdir .. "/plugins")
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plugins_utils.PLUGINS_RUNTIME_METADATA = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/plugins_metadata.lua")
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local RUNTIME_PATHS = {}
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local METADATA = nil
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-- ##############################################
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function plugins_utils.listPlugins()
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local plugins = {}
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local source_dirs = {{"community", plugins_utils.COMMUNITY_SOURCE_DIR}}
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local plugins_with_deps = {}
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if ntop.isPro() then
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source_dirs[#source_dirs + 1] = {"pro", plugins_utils.PRO_SOURCE_DIR}
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if ntop.isEnterprise() then
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source_dirs[#source_dirs + 1] = {"enterprise", plugins_utils.ENTERPRISE_SOURCE_DIR}
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end
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end
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for _, source_conf in ipairs(source_dirs) do
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local edition = source_conf[1]
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local source_dir = source_conf[2]
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for plugin_name in pairs(ntop.readdir(source_dir)) do
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local plugin_dir = os_utils.fixPath(source_dir .. "/" .. plugin_name)
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local plugin_info = os_utils.fixPath(plugin_dir .. "/plugin.lua")
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if ntop.exists(plugin_info) then
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-- Using loadfile instead of require is needed since the plugin.lua
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-- name is the same across the plusings
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local metadata = assert(loadfile(plugin_info))()
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-- Augument information
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metadata.path = plugin_dir
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metadata.key = plugin_name
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metadata.edition = edition
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if not table.empty(metadata.dependencies) then
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plugins_with_deps[plugin_name] = metadata
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else
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plugins[plugin_name] = metadata
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end
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else
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traceError(TRACE_ERROR, TRACE_CONSOLE, string.format("Missing plugin.lua in '%s'", plugin_name))
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end
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end
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end
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-- Check basic dependencies.
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-- No recursion is supported (e.g. dependency on a plugin which has dependencies itself)
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for plugin_name, metadata in pairs(plugins_with_deps) do
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local satisfied = true
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for _, dep_name in pairs(metadata.dependencies) do
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if not plugins[dep_name] then
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satisfied = false
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if do_trace then
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io.write(string.format("Skipping plugin '%s' with unmet depedendency ('%s')\n", plugin_name, dep_name))
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end
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break
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end
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end
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if satisfied then
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plugins[plugin_name] = metadata
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end
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end
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return(plugins)
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end
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-- ##############################################
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local function init_runtime_paths()
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RUNTIME_PATHS = {
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-- Definitions
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alert_definitions = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/alert_definitions"),
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status_definitions = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/status_definitions"),
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-- Locales
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locales = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/locales"),
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-- Timeseries
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ts_schemas = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/ts_schemas"),
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-- Web Gui
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web_gui = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH) .. "/scripts",
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-- User scripts
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interface_scripts = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/callbacks/interface/interface"),
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host_scripts = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/callbacks/interface/host"),
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network_scripts = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/callbacks/interface/network"),
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flow_scripts = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/callbacks/interface/flow"),
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syslog = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/callbacks/syslog"),
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snmp_scripts = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/callbacks/system/snmp_device"),
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system_scripts = os_utils.fixPath(plugins_utils.PLUGINS_RUNTIME_PATH .. "/callbacks/system/system"),
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}
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end
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-- ##############################################
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local function copy_file(fname, src_path, dst_path)
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local src = os_utils.fixPath(src_path .. "/" .. fname)
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local dst = os_utils.fixPath(dst_path .. "/" .. fname)
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local infile, err = io.open(src, "r")
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if(do_trace) then
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io.write(string.format("\tLoad [%s]\n", fname))
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end
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if(ntop.exists(dst)) then
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-- NOTE: overwriting is not allowed as it means that a file was already provided by
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-- another plugin
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traceError(TRACE_ERROR, TRACE_CONSOLE, string.format("Trying to overwrite existing file %s", dst))
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return(false)
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end
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if(infile == nil) then
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traceError(TRACE_ERROR, TRACE_CONSOLE, string.format("Could not open file %s for read: %s", src, err or ""))
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return(false)
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end
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local instr = infile:read("*a")
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infile:close()
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local outfile, err = io.open(dst, "w")
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if(outfile == nil) then
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traceError(TRACE_ERROR, TRACE_CONSOLE, string.format("Could not open file %s for write", dst, err or ""))
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return(false)
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end
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outfile:write(instr)
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outfile:close()
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return(true)
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end
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local function recursive_copy(src_path, dst_path, path_map)
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for fname in pairs(ntop.readdir(src_path)) do
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if not copy_file(fname, src_path, dst_path) then
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return(false)
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end
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if path_map then
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path_map[os_utils.fixPath(dst_path .. "/" .. fname)] = os_utils.fixPath(src_path .. "/" .. fname)
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end
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end
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return(true)
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end
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-- ##############################################
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local function load_plugin_definitions(plugin)
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return(
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recursive_copy(os_utils.fixPath(plugin.path .. "/alert_definitions"), RUNTIME_PATHS.alert_definitions) and
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recursive_copy(os_utils.fixPath(plugin.path .. "/status_definitions"), RUNTIME_PATHS.status_definitions)
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)
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end
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-- ##############################################
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local function load_plugin_ts_schemas(plugin)
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local src_path = os_utils.fixPath(plugin.path .. "/ts_schemas")
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local ts_path = os_utils.fixPath(RUNTIME_PATHS.ts_schemas .. "/" .. plugin.key)
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if ntop.exists(src_path) then
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ntop.mkdir(ts_path)
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return(
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recursive_copy(src_path, ts_path)
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)
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end
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return(true)
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end
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-- ##############################################
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local function load_plugin_i18n(locales, default_locale, plugin)
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local locales_dir = os_utils.fixPath(plugin.path .. "/locales")
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local locales_path = ntop.readdir(locales_dir)
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if table.empty(locales_path) then
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return(true)
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end
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-- Ensure that the plugin localization will not override any existing
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-- key
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if default_locale[plugin.key] then
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traceError(TRACE_WARNING, TRACE_CONSOLE, string.format(
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"Plugin name %s overlaps with an existing i18n key. Please rename the plugin.", plugin.key))
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return(false)
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end
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for fname in pairs(locales_path) do
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if string.ends(fname, ".lua") then
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local full_path = os_utils.fixPath(locales_dir .. "/" .. fname)
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local locale = persistence.load(full_path)
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if locale then
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locales[fname] = locales[fname] or {}
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locales[fname][plugin.key] = locale
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if do_trace then
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io.write("\ti18n: " .. fname .. "\n")
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end
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else
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return(false)
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end
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end
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end
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return(true)
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end
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-- ##############################################
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local function load_plugin_user_scripts(paths_to_plugin, plugin)
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local scripts_path = os_utils.fixPath(plugin.path .. "/user_scripts")
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local paths_map = {}
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local rv = (
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recursive_copy(os_utils.fixPath(scripts_path .. "/interface"), RUNTIME_PATHS.interface_scripts, paths_map) and
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recursive_copy(os_utils.fixPath(scripts_path .. "/host"), RUNTIME_PATHS.host_scripts, paths_map) and
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recursive_copy(os_utils.fixPath(scripts_path .. "/network"), RUNTIME_PATHS.network_scripts, paths_map) and
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recursive_copy(os_utils.fixPath(scripts_path .. "/flow"), RUNTIME_PATHS.flow_scripts, paths_map) and
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recursive_copy(os_utils.fixPath(scripts_path .. "/syslog"), RUNTIME_PATHS.syslog, paths_map) and
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recursive_copy(os_utils.fixPath(scripts_path .. "/snmp_device"), RUNTIME_PATHS.snmp_scripts, paths_map) and
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recursive_copy(os_utils.fixPath(scripts_path .. "/system"), RUNTIME_PATHS.system_scripts, paths_map)
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)
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for runtime_path, source_path in pairs(paths_map) do
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paths_to_plugin[runtime_path] = {
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source_path = source_path,
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plugin = plugin,
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}
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end
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return(rv)
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end
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-- ##############################################
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local function load_plugin_web_gui(menu_entries, plugin)
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local gui_dir = os_utils.fixPath(plugin.path .. "/web_gui")
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for fname in pairs(ntop.readdir(gui_dir)) do
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if(fname == "menu.lua") then
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local menu_entry = assert(loadfile(os_utils.fixPath(gui_dir .. "/" .. fname)))()
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if(menu_entry) then
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if(menu_entry.label == nil) then
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traceError(TRACE_ERROR, TRACE_CONSOLE, string.format("Missing menu entry 'label' in %s (menu.lua)", plugin.key))
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return(false)
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elseif(menu_entry.script == nil) then
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traceError(TRACE_ERROR, TRACE_CONSOLE, string.format("Missing menu entry 'script' in %s (menu.lua)", plugin.key))
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return(false)
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else
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-- Check that the menu entry exists
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local script_path = os_utils.fixPath(gui_dir .. "/" .. menu_entry.script)
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if(not ntop.exists(script_path)) then
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traceError(TRACE_ERROR, TRACE_CONSOLE, string.format("Missing menu entry script path '%s' does not exists in %s", script_path, plugin.key))
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return(false)
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end
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menu_entry.url = plugins_utils.getUrl(menu_entry.script)
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end
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end
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menu_entries[plugin.key] = menu_entry
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else
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if not copy_file(fname, gui_dir, RUNTIME_PATHS.web_gui) then
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return(false)
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end
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end
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end
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return(true)
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end
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-- ##############################################
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-- @brief Loads the ntopng plugins into a single directory tree.
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-- @notes This should be called at startup
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function plugins_utils.loadPlugins()
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local locales_utils = require("locales_utils")
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local plugins = plugins_utils.listPlugins()
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local locales = {}
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local menu_entries = {}
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local path_map = {}
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local en_locale = locales_utils.readDefaultLocale()
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-- Clean previous structure
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ntop.rmdir(plugins_utils.PLUGINS_RUNTIME_PATH)
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-- Initialize directories
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init_runtime_paths()
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for _, path in pairs(RUNTIME_PATHS) do
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ntop.mkdir(path)
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end
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for _, plugin in pairs(plugins) do
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if do_trace then
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io.write(string.format("Loading plugin %s\n", plugin.key))
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end
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if load_plugin_definitions(plugin) and
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load_plugin_i18n(locales, en_locale, plugin) and
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load_plugin_ts_schemas(plugin) and
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load_plugin_web_gui(menu_entries, plugin) and
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load_plugin_user_scripts(path_map, plugin) then
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-- Ok
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else
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traceError(TRACE_ERROR, TRACE_CONSOLE, string.format("Errors occurred while processing plugin %s", plugin.key))
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end
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end
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-- Save the locales
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for fname, plugins_locales in pairs(locales) do
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local locale_path = os_utils.fixPath(RUNTIME_PATHS.locales .. "/" .. fname)
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persistence.store(locale_path, plugins_locales)
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end
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-- Save the menu entries
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if not table.empty(menu_entries) then
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local menu_path = os_utils.fixPath(RUNTIME_PATHS.web_gui .. "/menu.lua")
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persistence.store(menu_path, menu_entries)
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end
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-- Save loaded plugins metadata
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-- See load_metadata()
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local plugins_metadata = {
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plugins = plugins,
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path_map = path_map,
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}
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persistence.store(plugins_utils.PLUGINS_RUNTIME_METADATA, plugins_metadata)
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end
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-- ##############################################
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local schemas_loaded = {}
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function plugins_utils.loadSchemas(granularity)
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if(schemas_loaded["all"] or (granularity and schemas_loaded[granularity])) then
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-- already loaded
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return
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end
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init_runtime_paths()
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for plugin_name in pairs(ntop.readdir(RUNTIME_PATHS.ts_schemas)) do
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local ts_dir = os_utils.fixPath(RUNTIME_PATHS.ts_schemas .. "/" .. plugin_name)
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local files_to_load = nil
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if(granularity ~= nil) then
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-- Only load schemas for the specified granularity
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files_to_load = {granularity .. ".lua"}
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else
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-- load all
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files_to_load = ntop.readdir(ts_dir)
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end
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for _, fname in pairs(files_to_load) do
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if string.ends(fname, ".lua") then
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local fgran = string.sub(fname, 1, string.len(fname)-4)
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local fpath = os_utils.fixPath(ts_dir .. "/" .. fname)
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-- Check if not already loaded
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if((schemas_loaded[fgran] == nil) and ntop.exists(fpath)) then
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-- load the script
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assert(loadfile(fpath))()
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end
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end
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end
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end
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schemas_loaded[granularity or "all"] = true
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end
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-- ##############################################
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function plugins_utils.getMenuEntries()
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init_runtime_paths()
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local menu_path = os_utils.fixPath(RUNTIME_PATHS.web_gui .. "/menu.lua")
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if ntop.exists(menu_path) then
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local menu = assert(loadfile(menu_path))()
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return(menu)
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end
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return(nil)
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end
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-- ##############################################
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function plugins_utils.getUrl(script)
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return(ntop.getHttpPrefix() .. "/plugins/" .. script)
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end
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-- ##############################################
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function plugins_utils.hasAlerts(ifid, options)
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-- Requiring alert_utils here to optimize second.lua
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require("alert_utils")
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local opts = table.merge(options, {ifid = ifid})
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local old_iface = iface
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local rv
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interface.select(ifid)
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rv = (areAlertsEnabled() and
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(hasAlerts("historical", getTabParameters(opts, "historical")) or
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hasAlerts("engaged", getTabParameters(opts, "engaged"))))
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interface.select(old_iface)
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return(rv)
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end
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-- ##############################################
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function plugins_utils.timeseriesCreationEnabled()
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local system_probes_timeseries_enabled = true
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if ntop.getPref("ntopng.prefs.system_probes_timeseries") == "0" then
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system_probes_timeseries_enabled = false
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end
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return system_probes_timeseries_enabled
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end
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-- ##############################################
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local function load_metadata()
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if(METADATA == nil) then
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METADATA = assert(loadfile(plugins_utils.PLUGINS_RUNTIME_METADATA))()
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end
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end
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-- ##############################################
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-- @brief Retrieve the original source path of a user script
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-- @param script_path the runtime path of the user script
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-- @return the user script source path
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function plugins_utils.getUserScriptSourcePath(script_path)
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load_metadata()
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local info = METADATA.path_map[script_path]
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if info then
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return(info.source_path)
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end
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end
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-- ##############################################
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-- @brief Retrieve the plugin associated with the user script
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-- @param script_path the runtime path of the user script
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-- @return the associated plugin
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function plugins_utils.getUserScriptPlugin(script_path)
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load_metadata()
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local info = METADATA.path_map[script_path]
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if info then
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return(info.plugin)
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end
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end
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-- ##############################################
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return(plugins_utils)
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