#580 RTU gateway backplane
This commit is contained in:
Mikayla Fischler
268
rtu/backplane.lua
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268
rtu/backplane.lua
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--
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-- RTU Gateway System Core Peripheral Backplane
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--
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local log = require("scada-common.log")
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local network = require("scada-common.network")
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local ppm = require("scada-common.ppm")
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local util = require("scada-common.util")
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local databus = require("rtu.databus")
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local rtu = require("rtu.rtu")
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---@class rtu_backplane
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local backplane = {}
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local _bp = {
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smem = nil, ---@type rtu_shared_memory
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wlan_en = true,
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wlan_pref = true,
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lan_en = false,
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lan_iface = "",
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act_nic = nil, ---@type nic|nil
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wl_act = true,
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wd_nic = nil, ---@type nic|nil
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wl_nic = nil, ---@type nic|nil
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sounders = {} ---@type rtu_speaker_sounder[]
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}
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-- initialize the system peripheral backplane
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---@param config rtu_config
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---@param __shared_memory rtu_shared_memory
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function backplane.init(config, __shared_memory)
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_bp.smem = __shared_memory
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_bp.wlan_en = config.WirelessModem
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_bp.wlan_pref = config.PreferWireless
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_bp.lan_en = type(config.WiredModem) == "string"
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_bp.lan_iface = config.WiredModem
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-- init wired NIC
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if _bp.lan_en then
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local modem = ppm.get_wired_modem(_bp.lan_iface)
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if modem then
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_bp.wd_nic = network.nic(modem)
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log.info("BKPLN: WIRED PHY_UP " .. _bp.lan_iface)
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end
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end
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-- init wireless NIC(s)
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if _bp.wlan_en then
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local modem, iface = ppm.get_wireless_modem()
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if modem then
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_bp.wl_nic = network.nic(modem)
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log.info("BKPLN: WIRELESS PHY_UP " .. iface)
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end
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end
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-- grab the preferred active NIC
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if _bp.wlan_pref then
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_bp.wl_act = true
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_bp.act_nic = _bp.wl_nics[1]
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else
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_bp.wl_act = false
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_bp.act_nic = _bp.wd_nic
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end
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databus.tx_hw_modem(_bp.act_nic ~= nil)
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-- find and setup all speakers
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local speakers = ppm.get_all_devices("speaker")
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for _, s in pairs(speakers) do
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local sounder = rtu.init_sounder(s)
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table.insert(_bp.sounders, sounder)
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log.debug(util.c("BKPLN: added speaker, attached as ", sounder.name))
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end
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databus.tx_hw_spkr_count(#_bp.sounders)
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end
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-- get the active NIC
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---@return nic|nil
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function backplane.active_nic() return _bp.act_nic end
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-- get the sounder interfaces
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---@return rtu_speaker_sounder[]
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function backplane.sounders() return _bp.sounders end
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-- handle a backplane peripheral detach
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---@param type string
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---@param device table
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---@param iface string
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function backplane.detach(type, device, iface)
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local function println_ts(message) if not _bp.smem.rtu_state.fp_ok then util.println_ts(message) end end
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local wl_nic, wd_nic = _bp.wl_nic, _bp.wd_nic
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local comms = _bp.smem.rtu_sys.rtu_comms
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if type == "modem" then
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---@cast device Modem
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local was_active = _bp.act_nic and _bp.act_nic.is_modem(device)
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local was_wd = wd_nic and wd_nic.is_modem(device)
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local was_wl = wl_nic and wl_nic.is_modem(device)
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if wd_nic and was_wd then
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log.info("BKPLN: WIRED PHY_DOWN " .. iface)
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wd_nic.disconnect()
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elseif wl_nic and was_wl then
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log.info("BKPLN: WIRELESS PHY_DOWN " .. iface)
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wl_nic.disconnect()
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end
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-- we only care if this is our active comms modem
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if was_active then
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println_ts("active comms modem disconnected!")
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log.warning("active comms modem disconnected")
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-- failover and try to find a new comms modem
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if _bp.wl_act then
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-- try to find another wireless modem, otherwise switch to wired
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local other_modem = ppm.get_wireless_modem()
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if other_modem then
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log.info("found another wireless modem, using it for comms")
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-- note: must assign to self.wl_nic if creating a nic, otherwise it only changes locally
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if wl_nic then
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wl_nic.connect(other_modem)
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else _bp.wl_nic = network.nic(other_modem) end
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log.info("BKPLN: WIRELESS PHY_UP " .. iface)
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_bp.act_nic = wl_nic
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comms.assign_nic(_bp.act_nic)
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log.info("BKPLN: switched comms to new wireless modem")
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elseif wd_nic and wd_nic.is_connected() then
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_bp.wl_act = false
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_bp.act_nic = _bp.wd_nic
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comms.assign_nic(_bp.act_nic)
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log.info("BKPLN: switched comms to wired modem")
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else
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_bp.act_nic = nil
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databus.tx_hw_modem(false)
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comms.unassign_nic()
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end
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else
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-- switch to wireless if able
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if wl_nic then
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_bp.wl_act = true
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_bp.act_nic = wl_nic
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comms.assign_nic(_bp.act_nic)
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log.info("BKPLN: switched comms to wireless modem")
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else
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_bp.act_nic = nil
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databus.tx_hw_modem(false)
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comms.unassign_nic()
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end
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end
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else
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log.warning("modem disconnected")
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end
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elseif type == "speaker" then
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---@cast device Speaker
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for i = 1, #_bp.sounders do
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if _bp.sounders[i].speaker == device then
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table.remove(_bp.sounders, i)
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log.warning(util.c("speaker ", iface, " disconnected"))
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println_ts("speaker disconnected")
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databus.tx_hw_spkr_count(#_bp.sounders)
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break
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end
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end
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end
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end
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-- handle a backplane peripheral attach
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---@param type string
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---@param device table
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---@param iface string
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function backplane.attach(type, device, iface)
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local function println_ts(message) if not _bp.smem.rtu_state.fp_ok then util.println_ts(message) end end
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local comms = _bp.smem.rtu_sys.rtu_comms
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if type == "modem" then
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---@cast device Modem
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local is_wd = _bp.lan_iface == iface
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local is_wl = ((not _bp.wl_nic) or (not _bp.wl_nic.is_connected())) and device.isWireless()
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if is_wd then
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-- connect this as the wired NIC
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if _bp.wd_nic then
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_bp.wd_nic.connect(device)
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else _bp.wd_nic = network.nic(device) end
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log.info("BKPLN: WIRED PHY_UP " .. iface)
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if _bp.act_nic == nil then
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-- set as active
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_bp.wl_act = false
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_bp.act_nic = _bp.wd_nic
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comms.assign_nic(_bp.act_nic)
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databus.tx_hw_modem(true)
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println_ts("comms modem reconnected.")
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log.info("BKPLN: switched comms to wired modem")
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elseif _bp.wl_act and not _bp.wlan_pref then
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-- switch back to preferred wired
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_bp.wl_act = false
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_bp.act_nic = _bp.wd_nic
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comms.assign_nic(_bp.act_nic)
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log.info("BKPLN: switched comms to wired modem (preferred)")
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end
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elseif is_wl then
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-- connect this as the wireless NIC
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if _bp.wl_nic then
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_bp.wl_nic.connect(device)
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else _bp.wl_nic = network.nic(device) end
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log.info("BKPLN: WIRELESS PHY_UP " .. iface)
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if _bp.act_nic == nil then
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-- set as active
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_bp.wl_act = true
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_bp.act_nic = _bp.wl_nic
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comms.assign_nic(_bp.act_nic)
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databus.tx_hw_modem(true)
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println_ts("comms modem reconnected.")
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log.info("BKPLN: switched comms to wireless modem")
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elseif (not _bp.wl_act) and _bp.wlan_pref then
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-- switch back to preferred wireless
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_bp.wl_act = true
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_bp.act_nic = _bp.wl_nic
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comms.assign_nic(_bp.act_nic)
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log.info("BKPLN: switched comms to wireless modem (preferred)")
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end
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elseif device.isWireless() then
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-- the wireless NIC already has a modem
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log.info("standby wireless modem connected")
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else
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log.info("wired modem connected")
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end
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elseif type == "speaker" then
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---@cast device Speaker
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table.insert(_bp.sounders, rtu.init_sounder(device))
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println_ts("speaker connected")
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log.info(util.c("connected speaker ", iface))
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databus.tx_hw_spkr_count(#_bp.sounders)
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end
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end
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return backplane
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