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S.P.L.U.R.T-Station-13/code/modules/NTNet/relays.dm
2020-01-22 20:17:42 +01:00

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// Relays don't handle any actual communication. Global NTNet datum does that, relays only tell the datum if it should or shouldn't work.
/obj/machinery/ntnet_relay
name = "NTNet Quantum Relay"
desc = "A very complex router and transmitter capable of connecting electronic devices together. Looks fragile."
use_power = ACTIVE_POWER_USE
active_power_usage = 10000 //10kW, apropriate for machine that keeps massive cross-Zlevel wireless network operational. Used to be 20 but that actually drained the smes one round
idle_power_usage = 100
icon = 'icons/obj/machines/telecomms.dmi'
icon_state = "bus"
density = TRUE
circuit = /obj/item/circuitboard/machine/ntnet_relay
ui_x = 400
ui_y = 300
var/datum/ntnet/NTNet = null // This is mostly for backwards reference and to allow varedit modifications from ingame.
var/enabled = 1 // Set to 0 if the relay was turned off
var/dos_failure = 0 // Set to 1 if the relay failed due to (D)DoS attack
var/list/dos_sources = list() // Backwards reference for qdel() stuff
var/uid
var/static/gl_uid = 1
// Denial of Service attack variables
var/dos_overload = 0 // Amount of DoS "packets" in this relay's buffer
var/dos_capacity = 500 // Amount of DoS "packets" in buffer required to crash the relay
var/dos_dissipate = 1 // Amount of DoS "packets" dissipated over time.
// TODO: Implement more logic here. For now it's only a placeholder.
/obj/machinery/ntnet_relay/is_operational()
if(stat & (BROKEN | NOPOWER | EMPED))
return FALSE
if(dos_failure)
return FALSE
if(!enabled)
return FALSE
return TRUE
/obj/machinery/ntnet_relay/update_icon()
if(is_operational())
icon_state = "bus"
else
icon_state = "bus_off"
/obj/machinery/ntnet_relay/process()
if(is_operational())
use_power = ACTIVE_POWER_USE
else
use_power = IDLE_POWER_USE
update_icon()
if(dos_overload)
dos_overload = max(0, dos_overload - dos_dissipate)
// If DoS traffic exceeded capacity, crash.
if((dos_overload > dos_capacity) && !dos_failure)
dos_failure = 1
update_icon()
SSnetworks.station_network.add_log("Quantum relay switched from normal operation mode to overload recovery mode.")
// If the DoS buffer reaches 0 again, restart.
if((dos_overload == 0) && dos_failure)
dos_failure = 0
update_icon()
SSnetworks.station_network.add_log("Quantum relay switched from overload recovery mode to normal operation mode.")
..()
/obj/machinery/ntnet_relay/ui_interact(mob/user, ui_key = "main", datum/tgui/ui = null, force_open = FALSE, datum/tgui/master_ui = null, datum/ui_state/state = GLOB.default_state)
ui = SStgui.try_update_ui(user, src, ui_key, ui, force_open)
if(!ui)
ui = new(user, src, ui_key, "ntnet_relay", "NTNet Quantum Relay", ui_x, ui_y, master_ui, state)
ui.open()
/obj/machinery/ntnet_relay/ui_data(mob/user)
var/list/data = list()
data["enabled"] = enabled
data["dos_capacity"] = dos_capacity
data["dos_overload"] = dos_overload
data["dos_crashed"] = dos_failure
return data
/obj/machinery/ntnet_relay/ui_act(action, params)
if(..())
return
switch(action)
if("restart")
dos_overload = 0
dos_failure = 0
update_icon()
SSnetworks.station_network.add_log("Quantum relay manually restarted from overload recovery mode to normal operation mode.")
return TRUE
if("toggle")
enabled = !enabled
SSnetworks.station_network.add_log("Quantum relay manually [enabled ? "enabled" : "disabled"].")
update_icon()
return TRUE
/obj/machinery/ntnet_relay/Initialize()
uid = gl_uid++
component_parts = list()
if(SSnetworks.station_network)
SSnetworks.station_network.relays.Add(src)
NTNet = SSnetworks.station_network
SSnetworks.station_network.add_log("New quantum relay activated. Current amount of linked relays: [NTNet.relays.len]")
. = ..()
/obj/machinery/ntnet_relay/Destroy()
if(SSnetworks.station_network)
SSnetworks.station_network.relays.Remove(src)
SSnetworks.station_network.add_log("Quantum relay connection severed. Current amount of linked relays: [NTNet.relays.len]")
NTNet = null
for(var/datum/computer_file/program/ntnet_dos/D in dos_sources)
D.target = null
D.error = "Connection to quantum relay severed"
return ..()