mirror of
https://github.com/MikaylaFischler/cc-mek-scada.git
synced 2024-08-30 18:22:34 +00:00
801 lines
31 KiB
Lua
801 lines
31 KiB
Lua
local comms = require("scada-common.comms")
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local log = require("scada-common.log")
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local util = require("scada-common.util")
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local iocontrol = require("pocket.iocontrol")
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local PROTOCOL = comms.PROTOCOL
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local DEVICE_TYPE = comms.DEVICE_TYPE
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local ESTABLISH_ACK = comms.ESTABLISH_ACK
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local MGMT_TYPE = comms.MGMT_TYPE
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local CRDN_TYPE = comms.CRDN_TYPE
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local LINK_STATE = iocontrol.LINK_STATE
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local pocket = {}
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local MQ__RENDER_CMD = {
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UNLOAD_SV_APPS = 1,
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UNLOAD_API_APPS = 2
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}
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local MQ__RENDER_DATA = {
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LOAD_APP = 1
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}
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pocket.MQ__RENDER_CMD = MQ__RENDER_CMD
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pocket.MQ__RENDER_DATA = MQ__RENDER_DATA
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---@type pkt_config
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local config = {}
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pocket.config = config
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-- load the pocket configuration
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function pocket.load_config()
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if not settings.load("/pocket.settings") then return false end
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config.TempScale = settings.get("TempScale")
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config.SVR_Channel = settings.get("SVR_Channel")
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config.CRD_Channel = settings.get("CRD_Channel")
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config.PKT_Channel = settings.get("PKT_Channel")
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config.ConnTimeout = settings.get("ConnTimeout")
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config.TrustedRange = settings.get("TrustedRange")
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config.AuthKey = settings.get("AuthKey")
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config.LogMode = settings.get("LogMode")
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config.LogPath = settings.get("LogPath")
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config.LogDebug = settings.get("LogDebug")
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local cfv = util.new_validator()
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cfv.assert_type_int(config.TempScale)
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cfv.assert_range(config.TempScale, 1, 4)
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cfv.assert_channel(config.SVR_Channel)
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cfv.assert_channel(config.CRD_Channel)
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cfv.assert_channel(config.PKT_Channel)
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cfv.assert_type_num(config.ConnTimeout)
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cfv.assert_min(config.ConnTimeout, 2)
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cfv.assert_type_num(config.TrustedRange)
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cfv.assert_min(config.TrustedRange, 0)
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cfv.assert_type_str(config.AuthKey)
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if type(config.AuthKey) == "string" then
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local len = string.len(config.AuthKey)
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cfv.assert(len == 0 or len >= 8)
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end
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cfv.assert_type_int(config.LogMode)
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cfv.assert_range(config.LogMode, 0, 1)
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cfv.assert_type_str(config.LogPath)
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cfv.assert_type_bool(config.LogDebug)
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return cfv.valid()
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end
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---@enum POCKET_APP_ID
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local APP_ID = {
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ROOT = 1,
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-- main app pages
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UNITS = 2,
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GUIDE = 3,
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ABOUT = 4,
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-- diag app page
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ALARMS = 5,
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-- other
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DUMMY = 6,
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NUM_APPS = 6
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}
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pocket.APP_ID = APP_ID
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---@class nav_tree_page
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---@field _p nav_tree_page|nil page's parent
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---@field _c table page's children
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---@field nav_to function function to navigate to this page
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---@field switcher function|nil function to switch between children
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---@field tasks table tasks to run while viewing this page
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-- allocate the page navigation system
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---@param render_queue mqueue
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function pocket.init_nav(render_queue)
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local self = {
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pane = nil, ---@type graphics_element
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apps = {},
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containers = {},
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help_map = {},
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help_return = nil,
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cur_app = APP_ID.ROOT
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}
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self.cur_page = self.root
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---@class pocket_nav
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local nav = {}
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-- set the root pane element to switch between apps with
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---@param root_pane graphics_element
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function nav.set_pane(root_pane)
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self.pane = root_pane
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end
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function nav.set_sidebar(sidebar)
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self.sidebar = sidebar
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end
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-- register an app
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---@param app_id POCKET_APP_ID app ID
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---@param container graphics_element element that contains this app (usually a Div)
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---@param pane graphics_element? multipane if this is a simple paned app, then nav_to must be a number
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function nav.register_app(app_id, container, pane)
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---@class pocket_app
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local app = {
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loaded = false,
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load = nil,
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cur_page = nil, ---@type nav_tree_page
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pane = pane,
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paned_pages = {},
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sidebar_items = {}
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}
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app.load = function () app.loaded = true end
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-- delayed set of the pane if it wasn't ready at the start
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---@param root_pane graphics_element multipane
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function app.set_root_pane(root_pane)
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app.pane = root_pane
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end
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function app.set_sidebar(items)
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app.sidebar_items = items
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if self.sidebar then self.sidebar.update(items) end
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end
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-- function to run on initial load into memory
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---@param on_load function callback
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function app.set_on_load(on_load)
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app.load = function ()
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on_load()
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app.loaded = true
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end
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end
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-- if a pane was provided, this will switch between numbered pages
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---@param idx integer page index
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function app.switcher(idx)
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if app.paned_pages[idx] then
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app.paned_pages[idx].nav_to()
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end
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end
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-- create a new page entry in the app's page navigation tree
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---@param parent nav_tree_page? a parent page or nil to set this as the root
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---@param nav_to function|integer function to navigate to this page or pane index
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---@return nav_tree_page new_page this new page
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function app.new_page(parent, nav_to)
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---@type nav_tree_page
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local page = { _p = parent, _c = {}, nav_to = function () end, switcher = function () end, tasks = {} }
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if parent == nil and app.cur_page == nil then
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app.cur_page = page
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end
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if type(nav_to) == "number" then
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app.paned_pages[nav_to] = page
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function page.nav_to()
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app.cur_page = page
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if app.pane then app.pane.set_value(nav_to) end
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end
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else
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function page.nav_to()
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app.cur_page = page
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nav_to()
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end
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end
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-- switch between children
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---@param id integer child ID
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function page.switcher(id) if page._c[id] then page._c[id].nav_to() end end
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if parent ~= nil then
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table.insert(page._p._c, page)
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end
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return page
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end
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-- get the currently active page
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function app.get_current_page() return app.cur_page end
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-- attempt to navigate up the tree
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---@return boolean success true if successfully navigated up
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function app.nav_up()
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local parent = app.cur_page._p
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if parent then parent.nav_to() end
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return parent ~= nil
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end
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self.apps[app_id] = app
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self.containers[app_id] = container
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return app
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end
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-- open a given app
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---@param app_id POCKET_APP_ID
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function nav.open_app(app_id)
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-- reset help return on navigating out of an app
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if app_id == APP_ID.ROOT then self.help_return = nil end
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local app = self.apps[app_id] ---@type pocket_app
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if app then
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if not app.loaded then render_queue.push_data(MQ__RENDER_DATA.LOAD_APP, app_id) end
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self.cur_app = app_id
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self.pane.set_value(app_id)
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if #app.sidebar_items > 0 then
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self.sidebar.update(app.sidebar_items)
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end
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else
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log.debug("tried to open unknown app")
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end
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end
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-- load a given app
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---@param app_id POCKET_APP_ID
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function nav.load_app(app_id)
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self.apps[app_id].load()
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end
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-- get a list of the app containers (usually Div elements)
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function nav.get_containers() return self.containers end
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-- get the currently active page
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---@return nav_tree_page
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function nav.get_current_page()
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return self.apps[self.cur_app].get_current_page()
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end
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-- attempt to navigate up
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function nav.nav_up()
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-- return out of help if opened with open_help
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if self.help_return then
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nav.open_app(self.help_return)
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self.help_return = nil
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return
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end
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local app = self.apps[self.cur_app] ---@type pocket_app
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log.debug("attempting app nav up for app " .. self.cur_app)
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if not app.nav_up() then
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log.debug("internal app nav up failed, going to home screen")
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nav.open_app(APP_ID.ROOT)
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end
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end
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-- open the help app, to show the reference for a key
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function nav.open_help(key)
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self.help_return = self.cur_app
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nav.open_app(APP_ID.GUIDE)
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local load = self.help_map[key]
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if load then load() end
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end
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-- link the help map from the guide app
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function nav.link_help(map) self.help_map = map end
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return nav
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end
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-- pocket coordinator + supervisor communications
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---@nodiscard
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---@param version string pocket version
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---@param nic nic network interface device
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---@param sv_watchdog watchdog
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---@param api_watchdog watchdog
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function pocket.comms(version, nic, sv_watchdog, api_watchdog)
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local self = {
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sv = {
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linked = false,
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addr = comms.BROADCAST,
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seq_num = 0,
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r_seq_num = nil, ---@type nil|integer
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last_est_ack = ESTABLISH_ACK.ALLOW
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},
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api = {
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linked = false,
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addr = comms.BROADCAST,
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seq_num = 0,
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r_seq_num = nil, ---@type nil|integer
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last_est_ack = ESTABLISH_ACK.ALLOW
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},
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establish_delay_counter = 0
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}
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comms.set_trusted_range(config.TrustedRange)
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-- PRIVATE FUNCTIONS --
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-- configure network channels
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nic.closeAll()
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nic.open(config.PKT_Channel)
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-- send a management packet to the supervisor
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---@param msg_type MGMT_TYPE
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---@param msg table
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local function _send_sv(msg_type, msg)
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local s_pkt = comms.scada_packet()
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local pkt = comms.mgmt_packet()
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pkt.make(msg_type, msg)
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s_pkt.make(self.sv.addr, self.sv.seq_num, PROTOCOL.SCADA_MGMT, pkt.raw_sendable())
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nic.transmit(config.SVR_Channel, config.PKT_Channel, s_pkt)
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self.sv.seq_num = self.sv.seq_num + 1
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end
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-- send a management packet to the coordinator
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---@param msg_type MGMT_TYPE
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---@param msg table
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local function _send_crd(msg_type, msg)
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local s_pkt = comms.scada_packet()
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local pkt = comms.mgmt_packet()
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pkt.make(msg_type, msg)
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s_pkt.make(self.api.addr, self.api.seq_num, PROTOCOL.SCADA_MGMT, pkt.raw_sendable())
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nic.transmit(config.CRD_Channel, config.PKT_Channel, s_pkt)
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self.api.seq_num = self.api.seq_num + 1
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end
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-- send an API packet to the coordinator
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---@param msg_type CRDN_TYPE
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---@param msg table
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local function _send_api(msg_type, msg)
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local s_pkt = comms.scada_packet()
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local pkt = comms.crdn_packet()
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pkt.make(msg_type, msg)
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s_pkt.make(self.api.addr, self.api.seq_num, PROTOCOL.SCADA_CRDN, pkt.raw_sendable())
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nic.transmit(config.CRD_Channel, config.PKT_Channel, s_pkt)
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self.api.seq_num = self.api.seq_num + 1
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end
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-- attempt supervisor connection establishment
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local function _send_sv_establish()
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_send_sv(MGMT_TYPE.ESTABLISH, { comms.version, version, DEVICE_TYPE.PKT })
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end
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-- attempt coordinator API connection establishment
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local function _send_api_establish()
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_send_crd(MGMT_TYPE.ESTABLISH, { comms.version, version, DEVICE_TYPE.PKT, comms.api_version })
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end
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-- keep alive ack to supervisor
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---@param srv_time integer
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local function _send_sv_keep_alive_ack(srv_time)
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_send_sv(MGMT_TYPE.KEEP_ALIVE, { srv_time, util.time() })
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end
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-- keep alive ack to coordinator
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---@param srv_time integer
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local function _send_api_keep_alive_ack(srv_time)
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_send_crd(MGMT_TYPE.KEEP_ALIVE, { srv_time, util.time() })
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end
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-- PUBLIC FUNCTIONS --
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---@class pocket_comms
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local public = {}
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-- close connection to the supervisor
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function public.close_sv()
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sv_watchdog.cancel()
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self.sv.linked = false
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self.sv.r_seq_num = nil
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self.sv.addr = comms.BROADCAST
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_send_sv(MGMT_TYPE.CLOSE, {})
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end
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-- close connection to coordinator API server
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function public.close_api()
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api_watchdog.cancel()
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self.api.linked = false
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self.api.r_seq_num = nil
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self.api.addr = comms.BROADCAST
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_send_crd(MGMT_TYPE.CLOSE, {})
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end
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-- close the connections to the servers
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function public.close()
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public.close_sv()
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public.close_api()
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end
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-- attempt to re-link if any of the dependent links aren't active
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function public.link_update()
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if not self.sv.linked then
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iocontrol.report_link_state(util.trinary(self.api.linked, LINK_STATE.API_LINK_ONLY, LINK_STATE.UNLINKED))
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if self.establish_delay_counter <= 0 then
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_send_sv_establish()
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self.establish_delay_counter = 4
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else
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self.establish_delay_counter = self.establish_delay_counter - 1
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end
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elseif not self.api.linked then
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iocontrol.report_link_state(LINK_STATE.SV_LINK_ONLY)
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if self.establish_delay_counter <= 0 then
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_send_api_establish()
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self.establish_delay_counter = 4
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else
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self.establish_delay_counter = self.establish_delay_counter - 1
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end
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else
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-- linked, all good!
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iocontrol.report_link_state(LINK_STATE.LINKED, self.sv.addr, self.api.addr)
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end
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end
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-- supervisor get active alarm tones
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function public.diag__get_alarm_tones()
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if self.sv.linked then _send_sv(MGMT_TYPE.DIAG_TONE_GET, {}) end
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end
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-- supervisor test alarm tones by tone
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---@param id TONE|0 tone ID, or 0 to stop all
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---@param state boolean tone state
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function public.diag__set_alarm_tone(id, state)
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if self.sv.linked then _send_sv(MGMT_TYPE.DIAG_TONE_SET, { id, state }) end
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end
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-- supervisor test alarm tones by alarm
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---@param id ALARM|0 alarm ID, 0 to stop all
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---@param state boolean alarm state
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function public.diag__set_alarm(id, state)
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if self.sv.linked then _send_sv(MGMT_TYPE.DIAG_ALARM_SET, { id, state }) end
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end
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-- coordinator get unit data
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function public.api__get_unit(unit)
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if self.api.linked then _send_api(CRDN_TYPE.API_GET_UNIT, { unit }) end
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end
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-- parse a packet
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---@param side string
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---@param sender integer
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---@param reply_to integer
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---@param message any
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---@param distance integer
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---@return mgmt_frame|crdn_frame|nil packet
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function public.parse_packet(side, sender, reply_to, message, distance)
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local s_pkt = nic.receive(side, sender, reply_to, message, distance)
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local pkt = nil
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if s_pkt then
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-- get as SCADA management packet
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if s_pkt.protocol() == PROTOCOL.SCADA_MGMT then
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local mgmt_pkt = comms.mgmt_packet()
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if mgmt_pkt.decode(s_pkt) then
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pkt = mgmt_pkt.get()
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end
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-- get as coordinator packet
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elseif s_pkt.protocol() == PROTOCOL.SCADA_CRDN then
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local crdn_pkt = comms.crdn_packet()
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if crdn_pkt.decode(s_pkt) then
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pkt = crdn_pkt.get()
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end
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else
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log.debug("attempted parse of illegal packet type " .. s_pkt.protocol(), true)
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end
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end
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return pkt
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end
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---@param packet mgmt_frame|crdn_frame
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---@param length integer
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---@param max integer?
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---@return boolean
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local function _check_length(packet, length, max)
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local ok = util.trinary(max == nil, packet.length == length, packet.length >= length and packet.length <= (max or 0))
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if not ok then
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local fmt = "[comms] RX_PACKET{r_chan=%d,proto=%d,type=%d}: packet length mismatch -> expect %d != actual %d"
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log.debug(util.sprintf(fmt, packet.scada_frame.remote_channel(), packet.scada_frame.protocol(), packet.type, length, packet.scada_frame.length()))
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end
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return ok
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end
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---@param packet mgmt_frame|crdn_frame
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local function _fail_type(packet)
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local fmt = "[comms] RX_PACKET{r_chan=%d,proto=%d,type=%d}: unrecognized packet type"
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log.debug(util.sprintf(fmt, packet.scada_frame.remote_channel(), packet.scada_frame.protocol(), packet.type))
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end
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-- handle a packet
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---@param packet mgmt_frame|crdn_frame|nil
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function public.handle_packet(packet)
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local diag = iocontrol.get_db().diag
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if packet ~= nil then
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local l_chan = packet.scada_frame.local_channel()
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local r_chan = packet.scada_frame.remote_channel()
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local protocol = packet.scada_frame.protocol()
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local src_addr = packet.scada_frame.src_addr()
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if l_chan ~= config.PKT_Channel then
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log.debug("received packet on unconfigured channel " .. l_chan, true)
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elseif r_chan == config.CRD_Channel then
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-- check sequence number
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if self.api.r_seq_num == nil then
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self.api.r_seq_num = packet.scada_frame.seq_num()
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elseif self.connected and ((self.api.r_seq_num + 1) ~= packet.scada_frame.seq_num()) then
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log.warning("sequence out-of-order (API): last = " .. self.api.r_seq_num .. ", new = " .. packet.scada_frame.seq_num())
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return
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elseif self.api.linked and (src_addr ~= self.api.addr) then
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log.debug("received packet from unknown computer " .. src_addr .. " while linked (API expected " .. self.api.addr ..
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"); channel in use by another system?")
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return
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else
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self.api.r_seq_num = packet.scada_frame.seq_num()
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end
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-- feed watchdog on valid sequence number
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api_watchdog.feed()
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if protocol == PROTOCOL.SCADA_CRDN then
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---@cast packet crdn_frame
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if self.api.linked then
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if packet.type == CRDN_TYPE.API_GET_FAC then
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if _check_length(packet, 11) then
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iocontrol.record_facility_data(packet.data)
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end
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elseif packet.type == CRDN_TYPE.API_GET_UNIT then
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if _check_length(packet, 11) and type(packet.data[1]) == "number" and iocontrol.get_db().units[packet.data[1]] then
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iocontrol.record_unit_data(packet.data)
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end
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else _fail_type(packet) end
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else
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log.debug("discarding coordinator SCADA_CRDN packet before linked")
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end
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elseif protocol == PROTOCOL.SCADA_MGMT then
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---@cast packet mgmt_frame
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if self.api.linked then
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if packet.type == MGMT_TYPE.KEEP_ALIVE then
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-- keep alive request received, echo back
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if _check_length(packet, 1) then
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local timestamp = packet.data[1]
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local trip_time = util.time() - timestamp
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if trip_time > 750 then
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log.warning("pocket coordinator KEEP_ALIVE trip time > 750ms (" .. trip_time .. "ms)")
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end
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-- log.debug("pocket coordinator TT = " .. trip_time .. "ms")
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_send_api_keep_alive_ack(timestamp)
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iocontrol.report_crd_tt(trip_time)
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end
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elseif packet.type == MGMT_TYPE.CLOSE then
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-- handle session close
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api_watchdog.cancel()
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self.api.linked = false
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self.api.r_seq_num = nil
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self.api.addr = comms.BROADCAST
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log.info("coordinator server connection closed by remote host")
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else _fail_type(packet) end
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elseif packet.type == MGMT_TYPE.ESTABLISH then
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-- connection with coordinator established
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if _check_length(packet, 1, 2) then
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local est_ack = packet.data[1]
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if est_ack == ESTABLISH_ACK.ALLOW then
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if packet.length == 2 then
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local fac_config = packet.data[2]
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if type(fac_config) == "table" and #fac_config == 2 then
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-- get configuration
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local conf = { num_units = fac_config[1], cooling = fac_config[2] }
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iocontrol.init_fac(conf, config.TempScale)
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log.info("coordinator connection established")
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self.establish_delay_counter = 0
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self.api.linked = true
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self.api.addr = src_addr
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if self.sv.linked then
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iocontrol.report_link_state(LINK_STATE.LINKED, self.sv.addr, self.api.addr)
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else
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iocontrol.report_link_state(LINK_STATE.API_LINK_ONLY)
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end
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else
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log.debug("invalid facility configuration table received from coordinator, establish failed")
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end
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else
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log.debug("received coordinator establish allow without facility configuration")
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end
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elseif est_ack == ESTABLISH_ACK.DENY then
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if self.api.last_est_ack ~= est_ack then
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log.info("coordinator connection denied")
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end
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elseif est_ack == ESTABLISH_ACK.COLLISION then
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if self.api.last_est_ack ~= est_ack then
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log.info("coordinator connection denied due to collision")
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end
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elseif est_ack == ESTABLISH_ACK.BAD_VERSION then
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if self.api.last_est_ack ~= est_ack then
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log.info("coordinator comms version mismatch")
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end
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elseif est_ack == ESTABLISH_ACK.BAD_API_VERSION then
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if self.api.last_est_ack ~= est_ack then
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log.info("coordinator api version mismatch")
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end
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else
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log.debug("coordinator SCADA_MGMT establish packet reply unsupported")
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end
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self.api.last_est_ack = est_ack
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end
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else
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log.debug("discarding coordinator non-link SCADA_MGMT packet before linked")
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end
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else
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log.debug("illegal packet type " .. protocol .. " from coordinator", true)
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end
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elseif r_chan == config.SVR_Channel then
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-- check sequence number
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if self.sv.r_seq_num == nil then
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self.sv.r_seq_num = packet.scada_frame.seq_num()
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elseif self.connected and ((self.sv.r_seq_num + 1) ~= packet.scada_frame.seq_num()) then
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log.warning("sequence out-of-order (SVR): last = " .. self.sv.r_seq_num .. ", new = " .. packet.scada_frame.seq_num())
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return
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elseif self.sv.linked and (src_addr ~= self.sv.addr) then
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log.debug("received packet from unknown computer " .. src_addr .. " while linked (SVR expected " .. self.sv.addr ..
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"); channel in use by another system?")
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return
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else
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self.sv.r_seq_num = packet.scada_frame.seq_num()
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end
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-- feed watchdog on valid sequence number
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sv_watchdog.feed()
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-- handle packet
|
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if protocol == PROTOCOL.SCADA_MGMT then
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---@cast packet mgmt_frame
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if self.sv.linked then
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if packet.type == MGMT_TYPE.KEEP_ALIVE then
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-- keep alive request received, echo back
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if _check_length(packet, 1) then
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local timestamp = packet.data[1]
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local trip_time = util.time() - timestamp
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if trip_time > 750 then
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log.warning("pocket supervisor KEEP_ALIVE trip time > 750ms (" .. trip_time .. "ms)")
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end
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-- log.debug("pocket supervisor TT = " .. trip_time .. "ms")
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_send_sv_keep_alive_ack(timestamp)
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iocontrol.report_svr_tt(trip_time)
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end
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elseif packet.type == MGMT_TYPE.CLOSE then
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-- handle session close
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sv_watchdog.cancel()
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self.sv.linked = false
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self.sv.r_seq_num = nil
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self.sv.addr = comms.BROADCAST
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log.info("supervisor server connection closed by remote host")
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elseif packet.type == MGMT_TYPE.DIAG_TONE_GET then
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if _check_length(packet, 8) then
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for i = 1, #packet.data do
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diag.tone_test.tone_indicators[i].update(packet.data[i] == true)
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end
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end
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elseif packet.type == MGMT_TYPE.DIAG_TONE_SET then
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if packet.length == 1 and packet.data[1] == false then
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diag.tone_test.ready_warn.set_value("testing denied")
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log.debug("supervisor SCADA diag tone set failed")
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elseif packet.length == 2 and type(packet.data[2]) == "table" then
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local ready = packet.data[1]
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local states = packet.data[2]
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diag.tone_test.ready_warn.set_value(util.trinary(ready, "", "system not ready"))
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for i = 1, #states do
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if diag.tone_test.tone_buttons[i] ~= nil then
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diag.tone_test.tone_buttons[i].set_value(states[i] == true)
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diag.tone_test.tone_indicators[i].update(states[i] == true)
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end
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end
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else
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log.debug("supervisor SCADA diag tone set packet length/type mismatch")
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end
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elseif packet.type == MGMT_TYPE.DIAG_ALARM_SET then
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if packet.length == 1 and packet.data[1] == false then
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diag.tone_test.ready_warn.set_value("testing denied")
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log.debug("supervisor SCADA diag alarm set failed")
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elseif packet.length == 2 and type(packet.data[2]) == "table" then
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local ready = packet.data[1]
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local states = packet.data[2]
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diag.tone_test.ready_warn.set_value(util.trinary(ready, "", "system not ready"))
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for i = 1, #states do
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if diag.tone_test.alarm_buttons[i] ~= nil then
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diag.tone_test.alarm_buttons[i].set_value(states[i] == true)
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end
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end
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else
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log.debug("supervisor SCADA diag alarm set packet length/type mismatch")
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end
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else _fail_type(packet) end
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elseif packet.type == MGMT_TYPE.ESTABLISH then
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-- connection with supervisor established
|
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if _check_length(packet, 1) then
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local est_ack = packet.data[1]
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if est_ack == ESTABLISH_ACK.ALLOW then
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log.info("supervisor connection established")
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self.establish_delay_counter = 0
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self.sv.linked = true
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self.sv.addr = src_addr
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if self.api.linked then
|
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iocontrol.report_link_state(LINK_STATE.LINKED, self.sv.addr, self.api.addr)
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else
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iocontrol.report_link_state(LINK_STATE.SV_LINK_ONLY)
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end
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elseif est_ack == ESTABLISH_ACK.DENY then
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if self.sv.last_est_ack ~= est_ack then
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log.info("supervisor connection denied")
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end
|
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elseif est_ack == ESTABLISH_ACK.COLLISION then
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if self.sv.last_est_ack ~= est_ack then
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log.info("supervisor connection denied due to collision")
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end
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elseif est_ack == ESTABLISH_ACK.BAD_VERSION then
|
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if self.sv.last_est_ack ~= est_ack then
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log.info("supervisor comms version mismatch")
|
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end
|
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else
|
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log.debug("supervisor SCADA_MGMT establish packet reply unsupported")
|
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end
|
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|
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self.sv.last_est_ack = est_ack
|
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end
|
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else
|
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log.debug("discarding supervisor non-link SCADA_MGMT packet before linked")
|
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end
|
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else _fail_type(packet) end
|
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else
|
|
log.debug("received packet from unconfigured channel " .. r_chan, true)
|
|
end
|
|
end
|
|
end
|
|
|
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-- check if we are still linked with the supervisor
|
|
---@nodiscard
|
|
function public.is_sv_linked() return self.sv.linked end
|
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|
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-- check if we are still linked with the coordinator
|
|
---@nodiscard
|
|
function public.is_api_linked() return self.api.linked end
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|
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return public
|
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end
|
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|
|
return pocket
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