Add Miner block

src/main/java/net/shadowfacts/phycon/api/Interface.java

@@ -0,0 +1,19 @@
+package net.shadowfacts.phycon.api;
+
+import net.shadowfacts.phycon.api.frame.EthernetFrame;
+import net.shadowfacts.phycon.api.util.MACAddress;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author shadowfacts
+ */
+public interface Interface {
+
+	@NotNull
+	MACAddress getMACAddress();
+
+	void receive(@NotNull EthernetFrame frame);
+
+	void send(@NotNull EthernetFrame frame);
+
+}

src/main/java/net/shadowfacts/phycon/api/NetworkCableBlock.java

@@ -3,6 +3,6 @@ package net.shadowfacts.phycon.api;
 /**
  * @author shadowfacts
  */
-public interface NetworkCable extends NetworkComponent {
+public interface NetworkCableBlock extends NetworkComponentBlock {
 
 }

src/main/java/net/shadowfacts/phycon/api/NetworkComponent.java

@@ -1,17 +0,0 @@
-package net.shadowfacts.phycon.api;
-
-import net.minecraft.block.BlockState;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.util.math.Direction;
-import net.minecraft.world.World;
-
-import java.util.Collection;
-
-/**
- * @author shadowfacts
- */
-public interface NetworkComponent {
-
-	Collection<Direction> getNetworkConnectedSides(BlockState state, World world, BlockPos pos);
-
-}

src/main/java/net/shadowfacts/phycon/api/NetworkComponentBlock.java

@@ -0,0 +1,23 @@
+package net.shadowfacts.phycon.api;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.World;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+
+/**
+ * @author shadowfacts
+ */
+public interface NetworkComponentBlock {
+
+	@NotNull
+	Collection<Direction> getNetworkConnectedSides(@NotNull BlockState state, @NotNull World world, @NotNull BlockPos pos);
+
+	@Nullable
+	Interface getNetworkInterfaceForSide(@NotNull Direction side, @NotNull BlockState state, @NotNull World world, @NotNull BlockPos pos);
+
+}

src/main/java/net/shadowfacts/phycon/api/NetworkDevice.java

@@ -0,0 +1,23 @@
+package net.shadowfacts.phycon.api;
+
+import net.shadowfacts.phycon.api.util.IPAddress;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author shadowfacts
+ */
+public interface NetworkDevice {
+
+	/**
+	 * The IP address of this device.
+	 *
+	 * If a device has not been assigned an address by a DHCP server, it may self-assign a randomly generated one.
+	 *
+	 * The address of a network device should never be the broadcast address.
+	 *
+	 * @return The IP address of this device.
+	 */
+	@NotNull
+	IPAddress getIPAddress();
+
+}

src/main/java/net/shadowfacts/phycon/api/NetworkInterface.java

@@ -1,14 +0,0 @@
-package net.shadowfacts.phycon.api;
-
-import net.minecraft.item.ItemStack;
-
-import java.util.Map;
-
-/**
- * @author shadowfacts
- */
-public interface NetworkInterface extends PacketSink {
-
-	Map<ItemStack, Integer> readAll();
-
-}

src/main/java/net/shadowfacts/phycon/api/PacketSink.java

@@ -1,16 +1,12 @@
 package net.shadowfacts.phycon.api;
 
 import net.shadowfacts.phycon.api.packet.Packet;
-import net.shadowfacts.phycon.api.util.MACAddress;
 import org.jetbrains.annotations.NotNull;
 
 /**
  * @author shadowfacts
  */
-public interface PacketSink {
-
-	@NotNull
-	MACAddress getMACAddress();
+public interface PacketSink extends NetworkDevice {
 
 	void handle(@NotNull Packet packet);
 

src/main/java/net/shadowfacts/phycon/api/PacketSource.java

@@ -1,15 +1,18 @@
 package net.shadowfacts.phycon.api;
 
 import net.shadowfacts.phycon.api.packet.Packet;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 /**
  * @author shadowfacts
  */
-public interface PacketSource {
+// todo: does PacketSource actually need to extend NetworkDevice?
+public interface PacketSource extends NetworkDevice {
 	// todo: better name for this
-	void sendToSingle(Packet packet);
+	void sendPacket(@NotNull Packet packet);
 
-	void sendToAll(Packet packet);
-
-	void sendToAll(Packet packet, Iterable<PacketSink> destinations);
+//	void sendToAll(@NotNull Packet packet);
+//
+//	void sendToAll(@NotNull Packet packet, @NotNull Iterable<PacketSink> destinations);
 }

src/main/java/net/shadowfacts/phycon/api/PhyAttributes.java

@@ -9,6 +9,5 @@ import alexiil.mc.lib.attributes.Attributes;
 public class PhyAttributes {
 
 	public static final Attribute<PacketSink> PACKET_SINK = Attributes.create(PacketSink.class);
-	public static final Attribute<NetworkInterface> NETWORK_INTERFACE = Attributes.create(NetworkInterface.class);
 
 }

src/main/java/net/shadowfacts/phycon/api/frame/EthernetFrame.java

@@ -0,0 +1,17 @@
+package net.shadowfacts.phycon.api.frame;
+
+import net.shadowfacts.phycon.api.util.MACAddress;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author shadowfacts
+ */
+public interface EthernetFrame {
+
+	@NotNull
+	MACAddress getSource();
+
+	@NotNull
+	MACAddress getDestination();
+
+}

src/main/java/net/shadowfacts/phycon/api/frame/PacketFrame.java

@@ -0,0 +1,14 @@
+package net.shadowfacts.phycon.api.frame;
+
+import net.shadowfacts.phycon.api.packet.Packet;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author shadowfacts
+ */
+public interface PacketFrame extends EthernetFrame {
+
+	@NotNull
+	Packet getPacket();
+
+}

src/main/java/net/shadowfacts/phycon/api/packet/Packet.java

@@ -1,6 +1,6 @@
 package net.shadowfacts.phycon.api.packet;
 
-import net.shadowfacts.phycon.api.util.MACAddress;
+import net.shadowfacts.phycon.api.util.IPAddress;
 import org.jetbrains.annotations.NotNull;
 
 /**
@@ -9,9 +9,9 @@ import org.jetbrains.annotations.NotNull;
 public interface Packet {
 
 	@NotNull
-	MACAddress getSource();
+	IPAddress getSource();
 
 	@NotNull
-	MACAddress getDestination();
+	IPAddress getDestination();
 
 }

src/main/java/net/shadowfacts/phycon/api/util/IPAddress.java

@@ -0,0 +1,75 @@
+package net.shadowfacts.phycon.api.util;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Random;
+
+/**
+ * @author shadowfacts
+ */
+public final class IPAddress {
+
+	@NotNull
+	public static IPAddress random(@NotNull Random random) {
+		int value = 0;
+		// don't accidentally generate reserved, broadcast, or loopback addresses
+		while (value == 0 || value == 0xff_ff_ff_ff || (value >> 24) == 127) {
+			value = random.nextInt();
+		}
+		return new IPAddress(value);
+	}
+
+	private static final Random ipAddressRandom = new Random();
+	@NotNull
+	public static IPAddress random() {
+		return random(ipAddressRandom);
+	}
+
+	public static final IPAddress BROADCAST = new IPAddress(0xff_ff_ff_ff);
+
+	public final int address;
+
+	public IPAddress(int address) {
+		if (address == 0) {
+			throw new RuntimeException("IP address 0.0.0.0 is reserved");
+		}
+		this.address = address;
+	}
+
+	public IPAddress(int a, int b, int c, int d) {
+		this(((a & 0xff) << 24) | ((b & 0xff) << 16) | ((c & 0xff) << 8) | (d & 0xff));
+	}
+
+	/**
+	 * @return If this IP address is a broadcast address (255.255.255.255).
+	 */
+	public boolean isBroadcast() {
+		return address == 0xff_ff_ff_ff;
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) return true;
+		if (o == null || getClass() != o.getClass()) return false;
+		IPAddress ipAddress = (IPAddress) o;
+		return address == ipAddress.address;
+	}
+
+	@Override
+	public int hashCode() {
+		return address;
+	}
+
+	@Override
+	public String toString() {
+		StringBuilder builder = new StringBuilder();
+		for (int i = 3; i >= 0; i--) {
+			if (i < 3) {
+				builder.append('.');
+			}
+			int octet = (address >> (i * 8)) & 0xff;
+			builder.append(octet);
+		}
+		return builder.toString();
+	}
+}

src/main/java/net/shadowfacts/phycon/api/util/MACAddress.java

@@ -15,12 +15,14 @@ public final class MACAddress {
 
 	public static final MACAddress BROADCAST = new MACAddress(0xffffffffffffL);
 
+	@NotNull
 	public static MACAddress random(Random random) {
 		long value = random.nextLong() & 0xfeffffffffffL;
 		return new MACAddress(value);
 	}
 
 	private static final Random macAddressRandom = new Random();
+	@NotNull
 	public static MACAddress random() {
 		return random(macAddressRandom);
 	}

src/main/kotlin/net/shadowfacts/phycon/PhysicalConnectivity.kt

@@ -4,6 +4,7 @@ import net.fabricmc.api.ModInitializer
 import net.shadowfacts.phycon.init.PhyBlockEntities
 import net.shadowfacts.phycon.init.PhyBlocks
 import net.shadowfacts.phycon.init.PhyItems
+import net.shadowfacts.phycon.init.PhyScreens
 
 /**
  * @author shadowfacts
@@ -16,6 +17,7 @@ object PhysicalConnectivity: ModInitializer {
 		PhyBlocks.init()
 		PhyBlockEntities.init()
 		PhyItems.init()
+		PhyScreens.init()
 	}
 
 }

src/main/kotlin/net/shadowfacts/phycon/init/PhyBlockEntities.kt

@@ -5,12 +5,20 @@ import net.minecraft.block.entity.BlockEntity
 import net.minecraft.block.entity.BlockEntityType
 import net.minecraft.util.Identifier
 import net.minecraft.util.registry.Registry
+import net.shadowfacts.phycon.network.block.extractor.ExtractorBlock
+import net.shadowfacts.phycon.network.block.extractor.ExtractorBlockEntity
+import net.shadowfacts.phycon.network.block.miner.MinerBlock
+import net.shadowfacts.phycon.network.block.miner.MinerBlockEntity
 import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlock
 import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlockEntity
 import net.shadowfacts.phycon.network.block.netswitch.SwitchBlock
 import net.shadowfacts.phycon.network.block.netswitch.SwitchBlockEntity
 import net.shadowfacts.phycon.network.block.terminal.TerminalBlock
 import net.shadowfacts.phycon.network.block.terminal.TerminalBlockEntity
+import net.shadowfacts.phycon.network.block.test.DestBlock
+import net.shadowfacts.phycon.network.block.test.DestBlockEntity
+import net.shadowfacts.phycon.network.block.test.SourceBlock
+import net.shadowfacts.phycon.network.block.test.SourceBlockEntity
 
 /**
  * @author shadowfacts
@@ -20,15 +28,25 @@ object PhyBlockEntities {
 	val INTERFACE = create(::InterfaceBlockEntity, PhyBlocks.INTERFACE)
 	val TERMINAL = create(::TerminalBlockEntity, PhyBlocks.TERMINAL)
 	val SWITCH = create(::SwitchBlockEntity, PhyBlocks.SWITCH)
+	val EXTRACTOR = create(::ExtractorBlockEntity, PhyBlocks.EXTRACTOR)
+	val MINER = create(::MinerBlockEntity, PhyBlocks.MINER)
+
+	val SOURCE = create(::SourceBlockEntity, PhyBlocks.SOURCE)
+	val DEST = create(::DestBlockEntity, PhyBlocks.DEST)
 
 	private fun <T: BlockEntity> create(builder: () -> T, block: Block): BlockEntityType<T> {
-		return BlockEntityType.Builder.create(builder, arrayOf(block)).build(null)
+		return BlockEntityType.Builder.create(builder, block).build(null)
 	}
 
 	fun init() {
 		register(InterfaceBlock.ID, INTERFACE)
 		register(TerminalBlock.ID, TERMINAL)
 		register(SwitchBlock.ID, SWITCH)
+		register(ExtractorBlock.ID, EXTRACTOR)
+		register(MinerBlock.ID, MINER)
+
+		register(SourceBlock.ID, SOURCE)
+		register(DestBlock.ID, DEST)
 	}
 
 	private fun register(id: Identifier, type: BlockEntityType<*>) {

src/main/kotlin/net/shadowfacts/phycon/init/PhyBlocks.kt

@@ -4,9 +4,13 @@ import net.minecraft.block.Block
 import net.minecraft.util.Identifier
 import net.minecraft.util.registry.Registry
 import net.shadowfacts.phycon.network.block.cable.CableBlock
+import net.shadowfacts.phycon.network.block.extractor.ExtractorBlock
+import net.shadowfacts.phycon.network.block.miner.MinerBlock
 import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlock
 import net.shadowfacts.phycon.network.block.netswitch.SwitchBlock
 import net.shadowfacts.phycon.network.block.terminal.TerminalBlock
+import net.shadowfacts.phycon.network.block.test.DestBlock
+import net.shadowfacts.phycon.network.block.test.SourceBlock
 
 /**
  * @author shadowfacts
@@ -17,12 +21,22 @@ object PhyBlocks {
 	val TERMINAL = TerminalBlock()
 	val SWITCH = SwitchBlock()
 	val CABLE = CableBlock()
+	val EXTRACTOR = ExtractorBlock()
+	val MINER = MinerBlock()
+
+	val SOURCE = SourceBlock()
+	val DEST = DestBlock()
 
 	fun init() {
 		register(InterfaceBlock.ID, INTERFACE)
 		register(TerminalBlock.ID, TERMINAL)
 		register(SwitchBlock.ID, SWITCH)
 		register(CableBlock.ID, CABLE)
+		register(ExtractorBlock.ID, EXTRACTOR)
+		register(MinerBlock.ID, MINER)
+
+		register(SourceBlock.ID, SOURCE)
+		register(DestBlock.ID, DEST)
 	}
 
 	private fun register(id: Identifier, block: Block) {

src/main/kotlin/net/shadowfacts/phycon/init/PhyItems.kt

@@ -4,11 +4,16 @@ import net.minecraft.item.BlockItem
 import net.minecraft.item.Item
 import net.minecraft.util.Identifier
 import net.minecraft.util.registry.Registry
+import net.shadowfacts.phycon.item.ConsoleItem
 import net.shadowfacts.phycon.item.ScrewdriverItem
 import net.shadowfacts.phycon.network.block.cable.CableBlock
+import net.shadowfacts.phycon.network.block.extractor.ExtractorBlock
+import net.shadowfacts.phycon.network.block.miner.MinerBlock
 import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlock
 import net.shadowfacts.phycon.network.block.netswitch.SwitchBlock
 import net.shadowfacts.phycon.network.block.terminal.TerminalBlock
+import net.shadowfacts.phycon.network.block.test.DestBlock
+import net.shadowfacts.phycon.network.block.test.SourceBlock
 
 /**
  * @author shadowfacts
@@ -19,16 +24,28 @@ object PhyItems {
 	val TERMINAL = BlockItem(PhyBlocks.TERMINAL, Item.Settings())
 	val SWITCH = BlockItem(PhyBlocks.SWITCH, Item.Settings())
 	val CABLE = BlockItem(PhyBlocks.CABLE, Item.Settings())
+	val EXTRACTOR = BlockItem(PhyBlocks.EXTRACTOR, Item.Settings())
+	val MINER = BlockItem(PhyBlocks.MINER, Item.Settings())
+
+	val SOURCE = BlockItem(PhyBlocks.SOURCE, Item.Settings())
+	val DEST = BlockItem(PhyBlocks.DEST , Item.Settings())
 
 	val SCREWDRIVER = ScrewdriverItem()
+	val CONSOLE = ConsoleItem()
 
 	fun init() {
 		register(InterfaceBlock.ID, INTERFACE)
 		register(TerminalBlock.ID, TERMINAL)
 		register(SwitchBlock.ID, SWITCH)
 		register(CableBlock.ID, CABLE)
+		register(ExtractorBlock.ID, EXTRACTOR)
+		register(MinerBlock.ID, MINER)
+
+		register(SourceBlock.ID, SOURCE)
+		register(DestBlock.ID, DEST)
 
 		register(ScrewdriverItem.ID, SCREWDRIVER)
+		register(ConsoleItem.ID, CONSOLE)
 	}
 
 	private fun register(id: Identifier, item: Item) {

src/main/kotlin/net/shadowfacts/phycon/init/PhyScreens.kt

@@ -1,12 +1,18 @@
 package net.shadowfacts.phycon.init
 
 import net.fabricmc.fabric.api.screenhandler.v1.ScreenHandlerRegistry
+import net.minecraft.screen.ScreenHandlerType
 import net.minecraft.util.Identifier
 import net.shadowfacts.phycon.PhysicalConnectivity
 import net.shadowfacts.phycon.network.block.terminal.TerminalScreenHandler
 
 object PhyScreens {
 
-	val TERMINAL_SCREEN_HANDLER = ScreenHandlerRegistry.registerExtended(Identifier(PhysicalConnectivity.MODID, "terminal"), ::TerminalScreenHandler)
+	lateinit var TERMINAL_SCREEN_HANDLER: ScreenHandlerType<TerminalScreenHandler>
+		private set
+
+	fun init() {
+		TERMINAL_SCREEN_HANDLER = ScreenHandlerRegistry.registerExtended(Identifier(PhysicalConnectivity.MODID, "terminal"), ::TerminalScreenHandler)
+	}
 
 }

src/main/kotlin/net/shadowfacts/phycon/item/ConsoleItem.kt

@@ -0,0 +1,47 @@
+package net.shadowfacts.phycon.item
+
+import net.fabricmc.api.EnvType
+import net.fabricmc.api.Environment
+import net.minecraft.client.MinecraftClient
+import net.minecraft.item.Item
+import net.minecraft.item.ItemUsageContext
+import net.minecraft.text.LiteralText
+import net.minecraft.util.ActionResult
+import net.minecraft.util.Identifier
+import net.shadowfacts.phycon.PhysicalConnectivity
+import net.shadowfacts.phycon.network.DeviceBlock
+import net.shadowfacts.phycon.network.DeviceBlockEntity
+import net.shadowfacts.phycon.screen.DeviceConsoleScreen
+
+/**
+ * @author shadowfacts
+ */
+class ConsoleItem: Item(Settings()) {
+	companion object {
+		val ID = Identifier(PhysicalConnectivity.MODID, "console")
+	}
+
+	override fun useOnBlock(context: ItemUsageContext): ActionResult {
+		val state = context.world.getBlockState(context.blockPos)
+		val block = state.block
+		if (block is DeviceBlock<*>) {
+			val be = block.getBlockEntity(context.world, context.blockPos)
+			if (be != null) {
+				if (context.world.isClient) {
+					this.openScreen(be)
+				} else {
+					be.sync()
+				}
+				return ActionResult.SUCCESS
+			}
+		}
+		return ActionResult.PASS
+	}
+
+	@Environment(EnvType.CLIENT)
+	private fun openScreen(be: DeviceBlockEntity) {
+		val screen = DeviceConsoleScreen(be)
+		MinecraftClient.getInstance().openScreen(screen)
+	}
+
+}

src/main/kotlin/net/shadowfacts/phycon/network/DeviceBlock.kt

@@ -3,13 +3,22 @@ package net.shadowfacts.phycon.network
 import net.minecraft.block.BlockState
 import net.minecraft.entity.player.PlayerEntity
 import net.minecraft.util.math.BlockPos
+import net.minecraft.util.math.Direction
 import net.minecraft.world.World
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.api.NetworkComponentBlock
 import net.shadowfacts.phycon.block.BlockWithEntity
 
 /**
  * @author shadowfacts
  */
-abstract class DeviceBlock<T: DeviceBlockEntity>(settings: Settings): BlockWithEntity<T>(settings) {
+abstract class DeviceBlock<T: DeviceBlockEntity>(settings: Settings): BlockWithEntity<T>(settings), NetworkComponentBlock {
+
+	abstract override fun getNetworkConnectedSides(state: BlockState, world: World, pos: BlockPos): Collection<Direction>
+
+	override fun getNetworkInterfaceForSide(side: Direction, state: BlockState, world: World, pos: BlockPos): Interface? {
+		return getBlockEntity(world, pos)!!
+	}
 
 	override fun onBreak(world: World, pos: BlockPos, state: BlockState, player: PlayerEntity) {
 		super.onBreak(world, pos, state, player)

src/main/kotlin/net/shadowfacts/phycon/network/DeviceBlockEntity.kt

@@ -1,83 +1,174 @@
 package net.shadowfacts.phycon.network
 
+import net.fabricmc.fabric.api.block.entity.BlockEntityClientSerializable
 import net.minecraft.block.BlockState
 import net.minecraft.block.entity.BlockEntity
 import net.minecraft.block.entity.BlockEntityType
 import net.minecraft.nbt.CompoundTag
+import net.minecraft.util.Tickable
 import net.shadowfacts.phycon.api.PacketSink
 import net.shadowfacts.phycon.api.PacketSource
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.api.NetworkComponentBlock
+import net.shadowfacts.phycon.api.frame.EthernetFrame
+import net.shadowfacts.phycon.api.frame.PacketFrame
 import net.shadowfacts.phycon.api.packet.Packet
+import net.shadowfacts.phycon.api.util.IPAddress
 import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.network.frame.ARPQueryFrame
+import net.shadowfacts.phycon.network.frame.ARPResponseFrame
+import net.shadowfacts.phycon.network.frame.BasePacketFrame
 import net.shadowfacts.phycon.network.packet.DeviceRemovedPacket
+import java.lang.RuntimeException
+import java.util.*
 
 /**
  * @author shadowfacts
  */
-abstract class DeviceBlockEntity(type: BlockEntityType<*>): BlockEntity(type), PacketSink, PacketSource {
+abstract class DeviceBlockEntity(type: BlockEntityType<*>): BlockEntity(type),
+	BlockEntityClientSerializable,
+	Tickable,
+	PacketSink,
+	PacketSource,
+	Interface {
 
-	var macAddress = MACAddress.random()
+	companion object {
+		private const val ARP_RETRY_TIMEOUT = 200
+	}
+
+	var macAddress: MACAddress = MACAddress.random()
 		protected set
 
-	override fun getMACAddress(): MACAddress {
-		return macAddress
+	var ipAddress: IPAddress = IPAddress.random()
+		protected set
+
+	private val arpTable = mutableMapOf<IPAddress, MACAddress>()
+	private val packetQueue = LinkedList<PendingPacket>()
+
+	protected var counter: Long = 0
+
+	override fun getIPAddress() = ipAddress
+	override fun getMACAddress() = macAddress
+
+	abstract override fun handle(packet: Packet)
+
+	override fun send(frame: EthernetFrame) {
+		findDestination()?.receive(frame)
 	}
 
-	override fun handle(packet: Packet) {
-		if (acceptsPacket(packet)) {
-			handlePacket(packet)
+	override fun receive(frame: EthernetFrame) {
+		println("$this ($ipAddress, ${macAddress}) received frame from ${frame.source}: $frame")
+		when (frame) {
+			is ARPQueryFrame -> handleARPQuery(frame)
+			is ARPResponseFrame -> handleARPResponse(frame)
+			is PacketFrame -> {
+				if (frame.packet.destination.isBroadcast || frame.packet.destination == ipAddress) {
+					println("$this ($ipAddress) received packet: ${frame.packet}")
+					handle(frame.packet)
+				}
+			}
 		}
 	}
 
-	protected abstract fun handlePacket(packet: Packet)
-
-	protected open fun acceptsPacket(packet: Packet): Boolean {
-		return when (packet.destination.type) {
-			MACAddress.Type.BROADCAST -> true
-			MACAddress.Type.UNICAST -> macAddress == packet.destination
-			MACAddress.Type.MULTICAST -> acceptsMulticastPacket(packet)
+	private fun handleARPQuery(frame: ARPQueryFrame) {
+		println("$this ($ipAddress) received ARP query for ${frame.queryIP}")
+		arpTable[frame.sourceIP] = frame.source
+		if (frame.queryIP == ipAddress) {
+			println("$this ($ipAddress) sending ARP response to ${frame.source} with $macAddress")
+			send(ARPResponseFrame(ipAddress, macAddress, frame.source))
 		}
 	}
 
-	open fun acceptsMulticastPacket(packet: Packet): Boolean {
-		return false
+	private fun handleARPResponse(frame: ARPResponseFrame) {
+		arpTable[frame.query] = frame.source
+		println("$this ($ipAddress) received ARP response for ${frame.query} with ${frame.source}")
+
+		val toRemove = packetQueue.filter { (packet, _) ->
+			if (packet.destination == frame.query) {
+				send(BasePacketFrame(packet, macAddress, frame.source))
+				true
+			} else {
+				false
+			}
+		}
+		packetQueue.removeAll(toRemove)
 	}
 
-	fun send(packet: Packet, destination: PacketSink) {
-		destination.handle(packet)
+	override fun sendPacket(packet: Packet) {
+		if (packet.destination.isBroadcast) {
+			send(BasePacketFrame(packet, macAddress, MACAddress.BROADCAST))
+		} else if (arpTable.containsKey(packet.destination)) {
+			send(BasePacketFrame(packet, macAddress, arpTable[packet.destination]!!))
+		} else {
+			packetQueue.add(PendingPacket(packet, counter))
+
+			println("$this ($ipAddress) sending ARP query for ${packet.destination}")
+			send(ARPQueryFrame(packet.destination, ipAddress, macAddress))
+		}
 	}
 
-	override fun sendToSingle(packet: Packet) {
-		val destinations = NetworkUtil.findDestinations(world!!, pos)
-		if (destinations.size != 1) {
-			// todo: handle this better
-			println("Can't send packet, multiple destinations available: $destinations")
-			return
+	open fun findDestination(): Interface? {
+		val sides = (cachedState.block as NetworkComponentBlock).getNetworkConnectedSides(cachedState, world!!, pos)
+		if (sides.size != 1) {
+			throw RuntimeException("DeviceBlockEntity.findDestination must be overridden by devices which have more than 1 network connected side")
 		}
-		send(packet, destinations.first())
+		return NetworkUtil.findConnectedInterface(world!!, pos, sides.first())
 	}
 
-	override fun sendToAll(packet: Packet) {
-		sendToAll(packet, NetworkUtil.findDestinations(world!!, pos))
-	}
+	override fun tick() {
+		counter++
 
-	override fun sendToAll(packet: Packet, destinations: Iterable<PacketSink>) {
-		destinations.forEach {
-			it.handle(packet)
+		if (!world!!.isClient) {
+			val toRemove = packetQueue.filter { entry ->
+				val (packet, timestamp) = entry
+				if (arpTable.containsKey(packet.destination)) {
+					send(BasePacketFrame(packet, macAddress, arpTable[packet.destination]!!))
+					true
+				} else if (counter - timestamp >= ARP_RETRY_TIMEOUT) {
+					send(ARPQueryFrame(packet.destination, ipAddress, macAddress))
+					entry.timestamp = counter
+					// todo: should there be a retry counter?
+					true
+				} else {
+					false
+				}
+			}
+			packetQueue.removeAll(toRemove)
 		}
 	}
 
 	override fun toTag(tag: CompoundTag): CompoundTag {
+		tag.putInt("IPAddress", ipAddress.address)
 		tag.putLong("MACAddress", macAddress.address)
 		return super.toTag(tag)
 	}
 
 	override fun fromTag(state: BlockState, tag: CompoundTag) {
 		super.fromTag(state, tag)
+		ipAddress = IPAddress(tag.getInt("IPAddress"))
+		macAddress = MACAddress(tag.getLong("MACAddress"))
+	}
+
+	override fun toClientTag(tag: CompoundTag): CompoundTag {
+		tag.putInt("IPAddress", ipAddress.address)
+		tag.putLong("MACAddress", macAddress.address)
+		return tag
+	}
+
+	override fun fromClientTag(tag: CompoundTag) {
+		ipAddress = IPAddress(tag.getInt("IPAddress"))
 		macAddress = MACAddress(tag.getLong("MACAddress"))
 	}
 
 	fun onBreak() {
-		sendToAll(DeviceRemovedPacket(this))
+		if (!world!!.isClient) {
+			sendPacket(DeviceRemovedPacket(this))
+		}
 	}
 
+	data class PendingPacket(
+		val packet: Packet,
+		var timestamp: Long,
+	)
+
 }

src/main/kotlin/net/shadowfacts/phycon/network/NetworkUtil.kt

@@ -3,10 +3,7 @@ package net.shadowfacts.phycon.network
 import net.minecraft.util.math.BlockPos
 import net.minecraft.util.math.Direction
 import net.minecraft.world.World
-import net.shadowfacts.phycon.api.NetworkCable
-import net.shadowfacts.phycon.api.NetworkComponent
-import net.shadowfacts.phycon.api.PacketSink
-import net.shadowfacts.phycon.api.PhyAttributes
+import net.shadowfacts.phycon.api.*
 import java.util.*
 
 /**
@@ -14,6 +11,32 @@ import java.util.*
  */
 object NetworkUtil {
 
+	fun findConnectedInterface(world: World, startPos: BlockPos, startSide: Direction): Interface? {
+		var curSide = startSide
+		var pos = startPos.offset(startSide)
+		var state = world.getBlockState(pos)
+		while (state.block is NetworkComponentBlock) {
+			val block = state.block as NetworkComponentBlock
+			val itf = block.getNetworkInterfaceForSide(curSide.opposite, state, world, pos)
+			if (itf != null) {
+				return itf
+			}
+			val connectedSides = block.getNetworkConnectedSides(state, world, pos).filter { it != curSide.opposite }
+			if (connectedSides.size == 1) {
+				curSide = connectedSides.first()
+				pos = pos.offset(curSide)
+				if (!world.isChunkLoaded(pos)) {
+					// avoid loading unloaded chunks
+					return null
+				}
+				state = world.getBlockState(pos)
+			} else {
+				return null
+			}
+		}
+		return null
+	}
+
 	fun findDestinations(world: World, startPos: BlockPos, direction: Direction? = null): List<PacketSink> {
 		val results = LinkedList<PacketSink>()
 		val visited = hashSetOf(startPos)
@@ -43,7 +66,7 @@ object NetworkUtil {
 	private fun findEdges(queue: MutableList<BlockPos>, visited: Set<BlockPos>, world: World, pos: BlockPos, includeNonCables: Boolean = false) {
 		val state = world.getBlockState(pos)
 		val block = state.block
-		if (block is NetworkComponent && (includeNonCables || block is NetworkCable)) {
+		if (block is NetworkComponentBlock && (includeNonCables || block is NetworkCableBlock)) {
 			val connections = block.getNetworkConnectedSides(state, world, pos)
 			for (side in connections) {
 				val newPos = pos.offset(side)

src/main/kotlin/net/shadowfacts/phycon/network/block/cable/CableBlock.kt

@@ -19,8 +19,9 @@ import net.minecraft.world.BlockView
 import net.minecraft.world.World
 import net.minecraft.world.WorldAccess
 import net.shadowfacts.phycon.PhysicalConnectivity
-import net.shadowfacts.phycon.api.NetworkCable
-import net.shadowfacts.phycon.api.NetworkComponent
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.api.NetworkCableBlock
+import net.shadowfacts.phycon.api.NetworkComponentBlock
 import net.shadowfacts.phycon.init.PhyItems
 import net.shadowfacts.phycon.util.CableConnection
 import java.util.*
@@ -31,7 +32,7 @@ import java.util.*
 class CableBlock: Block(
 	Settings.of(CABLE_MATERIAL)
 		.nonOpaque()
-), NetworkCable {
+), NetworkCableBlock {
 	companion object {
 		val ID = Identifier(PhysicalConnectivity.MODID, "cable")
 		val CABLE_MATERIAL = Material(MaterialColor.IRON, false, false, true, false, true, false, PistonBehavior.NORMAL)
@@ -108,11 +109,16 @@ class CableBlock: Block(
 					else -> CableConnection.ON
 				}
 			}
-			is NetworkComponent -> CableConnection.ON
+			is NetworkComponentBlock -> CableConnection.ON
 			else -> CableConnection.OFF
 		}
 	}
 
+	override fun getNetworkInterfaceForSide(side: Direction, state: BlockState, world: World, pos: BlockPos): Interface? {
+		// cables don't have network interfaces
+		return null
+	}
+
 	override fun onUse(
 		state: BlockState,
 		world: World,
@@ -141,7 +147,7 @@ class CableBlock: Block(
 							world.setBlockState(connectedToPos, connectedTo.with(CONNECTIONS[side.opposite], CableConnection.ON))
 						}
 
-						state.with(prop, if (connectedTo.block is NetworkComponent) CableConnection.ON else CableConnection.OFF)
+						state.with(prop, if (connectedTo.block is NetworkComponentBlock) CableConnection.ON else CableConnection.OFF)
 					}
 					else -> state.with(prop, CableConnection.DISABLED)
 				}

src/main/kotlin/net/shadowfacts/phycon/network/block/extractor/ExtractorBlock.kt

@@ -0,0 +1,110 @@
+package net.shadowfacts.phycon.network.block.extractor
+
+import net.minecraft.block.Block
+import net.minecraft.block.BlockState
+import net.minecraft.block.Material
+import net.minecraft.block.ShapeContext
+import net.minecraft.entity.LivingEntity
+import net.minecraft.item.ItemPlacementContext
+import net.minecraft.item.ItemStack
+import net.minecraft.state.StateManager
+import net.minecraft.state.property.Properties
+import net.minecraft.util.Identifier
+import net.minecraft.util.math.BlockPos
+import net.minecraft.util.math.Direction
+import net.minecraft.util.shape.VoxelShape
+import net.minecraft.util.shape.VoxelShapes
+import net.minecraft.world.BlockView
+import net.minecraft.world.World
+import net.shadowfacts.phycon.PhysicalConnectivity
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.network.DeviceBlock
+import java.util.*
+
+/**
+ * @author shadowfacts
+ */
+class ExtractorBlock: DeviceBlock<ExtractorBlockEntity>(Settings.of(Material.METAL)) {
+
+	companion object {
+		val ID = Identifier(PhysicalConnectivity.MODID, "extractor")
+		val FACING = Properties.FACING
+		private val EXTRACTOR_SHAPES = mutableMapOf<Direction, VoxelShape>()
+
+		init {
+			val components = arrayOf(
+				doubleArrayOf(0.0, 0.0, 0.0, 16.0, 2.0, 16.0),
+				doubleArrayOf(2.0, 2.0, 2.0, 14.0, 4.0, 14.0),
+				doubleArrayOf(4.0, 4.0, 4.0, 12.0, 6.0, 12.0),
+				doubleArrayOf(6.0, 6.0, 6.0, 10.0, 16.0, 10.0)
+			)
+			val directions = arrayOf(
+				Triple(Direction.DOWN, null, false),
+				Triple(Direction.UP, null, true),
+				Triple(Direction.NORTH, 2, false),
+				Triple(Direction.SOUTH, 2, true),
+				Triple(Direction.WEST, 1, false),
+				Triple(Direction.EAST, 1, true),
+			)
+			for ((dir, rotate, flip) in directions) {
+				val shapes = components.map { it ->
+					val arr = it.copyOf()
+					if (rotate != null) {
+						for (i in 0 until 3) {
+							arr[i] = it[(i + rotate) % 3]
+							arr[3 + i] = it[3 + ((i + rotate) % 3)]
+						}
+					}
+					if (flip) {
+						for (i in arr.indices) {
+							arr[i] = 16.0 - arr[i]
+						}
+					}
+					createCuboidShape(arr[0], arr[1], arr[2], arr[3], arr[4], arr[5])
+				}
+				EXTRACTOR_SHAPES[dir] = shapes.reduce { a, b -> VoxelShapes.union(a, b) }
+			}
+		}
+	}
+
+	override fun getNetworkConnectedSides(state: BlockState, world: World, pos: BlockPos): Collection<Direction> {
+		return EnumSet.of(state[FACING].opposite)
+	}
+
+	override fun getNetworkInterfaceForSide(side: Direction, state: BlockState, world: World, pos: BlockPos): Interface? {
+		return if (side == state[FACING].opposite) {
+			getBlockEntity(world, pos)
+		} else {
+			null
+		}
+	}
+
+	override fun appendProperties(builder: StateManager.Builder<Block, BlockState>) {
+		super.appendProperties(builder)
+		builder.add(FACING)
+	}
+
+	override fun createBlockEntity(world: BlockView) = ExtractorBlockEntity()
+
+	override fun getPlacementState(context: ItemPlacementContext): BlockState {
+		val facing = if (context.player?.isSneaking == true) context.side.opposite else context.playerFacing.opposite
+		return defaultState.with(FACING, facing)
+	}
+
+	override fun getOutlineShape(state: BlockState, world: BlockView, pos: BlockPos, context: ShapeContext): VoxelShape {
+		return EXTRACTOR_SHAPES[state[FACING]]!!
+	}
+
+	override fun onPlaced(world: World, pos: BlockPos, state: BlockState, entity: LivingEntity?, stack: ItemStack) {
+		if (!world.isClient) {
+			getBlockEntity(world, pos)!!.updateInventory()
+		}
+	}
+
+	override fun neighborUpdate(state: BlockState, world: World, pos: BlockPos, neighbor: Block, neighborPos: BlockPos, bl: Boolean) {
+		if (!world.isClient) {
+			getBlockEntity(world, pos)!!.updateInventory()
+		}
+	}
+
+}

src/main/kotlin/net/shadowfacts/phycon/network/block/extractor/ExtractorBlockEntity.kt

@@ -0,0 +1,59 @@
+package net.shadowfacts.phycon.network.block.extractor
+
+import alexiil.mc.lib.attributes.SearchOptions
+import alexiil.mc.lib.attributes.item.FixedItemInv
+import alexiil.mc.lib.attributes.item.GroupedItemInv
+import alexiil.mc.lib.attributes.item.ItemAttributes
+import net.minecraft.util.math.Direction
+import net.shadowfacts.phycon.api.packet.Packet
+import net.shadowfacts.phycon.api.util.IPAddress
+import net.shadowfacts.phycon.init.PhyBlockEntities
+import net.shadowfacts.phycon.network.DeviceBlockEntity
+import net.shadowfacts.phycon.network.packet.CapacityPacket
+import net.shadowfacts.phycon.network.packet.CheckCapacityPacket
+import net.shadowfacts.phycon.network.packet.ItemStackPacket
+
+/**
+ * @author shadowfacts
+ */
+class ExtractorBlockEntity: DeviceBlockEntity(PhyBlockEntities.EXTRACTOR) {
+
+	private val facing: Direction
+		get() = cachedState[ExtractorBlock.FACING]
+
+	private var inventory: GroupedItemInv? = null
+	private var shouldExtract = false
+
+	fun updateInventory() {
+		val offsetPos = pos.offset(facing)
+		val option = SearchOptions.inDirection(facing)
+		inventory = ItemAttributes.GROUPED_INV.getFirstOrNull(world, offsetPos, option)
+	}
+
+	private fun getInventory(): GroupedItemInv? {
+		if (inventory == null) updateInventory()
+		return inventory
+	}
+
+	override fun handle(packet: Packet) {
+		if (packet is CapacityPacket && shouldExtract) {
+			getInventory()?.also { inv ->
+				shouldExtract = false
+				val extracted = inv.extract(packet.stack, packet.capacity)
+				sendPacket(ItemStackPacket(extracted, ipAddress, packet.stackReceiver.ipAddress))
+			}
+		}
+	}
+
+	override fun tick() {
+		super.tick()
+
+		if (!world!!.isClient && counter % 40 == 0L) {
+			getInventory()?.also {
+				val stack = it.storedStacks.firstOrNull() ?: return
+				shouldExtract = true
+				sendPacket(CheckCapacityPacket(stack, ipAddress, IPAddress.BROADCAST))
+			}
+		}
+	}
+}

src/main/kotlin/net/shadowfacts/phycon/network/block/miner/MinerBlock.kt

@@ -0,0 +1,68 @@
+package net.shadowfacts.phycon.network.block.miner
+
+import net.minecraft.block.Block
+import net.minecraft.block.BlockState
+import net.minecraft.block.Material
+import net.minecraft.entity.LivingEntity
+import net.minecraft.item.ItemPlacementContext
+import net.minecraft.item.ItemStack
+import net.minecraft.state.StateManager
+import net.minecraft.state.property.Properties
+import net.minecraft.util.Identifier
+import net.minecraft.util.math.BlockPos
+import net.minecraft.util.math.Direction
+import net.minecraft.world.BlockView
+import net.minecraft.world.World
+import net.shadowfacts.phycon.PhysicalConnectivity
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.network.DeviceBlock
+import net.shadowfacts.phycon.network.block.extractor.ExtractorBlock
+import java.util.*
+
+/**
+ * @author shadowfacts
+ */
+class MinerBlock: DeviceBlock<MinerBlockEntity>(Settings.of(Material.METAL)) {
+
+	companion object {
+		val ID = Identifier(PhysicalConnectivity.MODID, "miner")
+		val FACING = Properties.FACING
+	}
+
+	override fun getNetworkConnectedSides(state: BlockState, world: World, pos: BlockPos): Collection<Direction> {
+		return EnumSet.of(state[FACING].opposite)
+	}
+
+	override fun getNetworkInterfaceForSide(side: Direction, state: BlockState, world: World, pos: BlockPos): Interface? {
+		return if (side == state[FACING]) {
+			null
+		} else {
+			getBlockEntity(world, pos)
+		}
+	}
+
+	override fun appendProperties(builder: StateManager.Builder<Block, BlockState>) {
+		super.appendProperties(builder)
+		builder.add(FACING)
+	}
+
+	override fun createBlockEntity(world: BlockView) = MinerBlockEntity()
+
+	override fun getPlacementState(context: ItemPlacementContext): BlockState? {
+		val facing = if (context.player?.isSneaking == true) context.side.opposite else context.playerFacing.opposite
+		return defaultState.with(ExtractorBlock.FACING, facing)
+	}
+
+	override fun onPlaced(world: World, pos: BlockPos, state: BlockState, entity: LivingEntity?, itemStack: ItemStack) {
+		if (!world.isClient) {
+//			getBlockEntity(world, pos)!!.updateBlockToMine()
+		}
+	}
+
+	override fun neighborUpdate(state: BlockState, world: World, pos: BlockPos, neighbor: Block, neighborPos: BlockPos, bl: Boolean) {
+		if (!world.isClient) {
+//			getBlockEntity(world, pos)!!.updateBlockToMine()
+		}
+	}
+
+}

src/main/kotlin/net/shadowfacts/phycon/network/block/miner/MinerBlockEntity.kt

@@ -0,0 +1,127 @@
+package net.shadowfacts.phycon.network.block.miner
+
+import alexiil.mc.lib.attributes.item.GroupedItemInvView
+import alexiil.mc.lib.attributes.item.ItemStackUtil
+import alexiil.mc.lib.attributes.item.filter.ItemFilter
+import net.minecraft.block.Block
+import net.minecraft.block.BlockState
+import net.minecraft.item.ItemStack
+import net.minecraft.server.world.ServerWorld
+import net.minecraft.util.math.BlockPos
+import net.minecraft.util.math.Direction
+import net.minecraft.world.World
+import net.shadowfacts.phycon.api.packet.Packet
+import net.shadowfacts.phycon.api.util.IPAddress
+import net.shadowfacts.phycon.init.PhyBlockEntities
+import net.shadowfacts.phycon.network.DeviceBlockEntity
+import net.shadowfacts.phycon.network.component.NetworkStackProvider
+import net.shadowfacts.phycon.network.packet.*
+import kotlin.math.min
+
+/**
+ * @author shadowfacts
+ */
+class MinerBlockEntity: DeviceBlockEntity(PhyBlockEntities.MINER),
+	NetworkStackProvider {
+
+	private val facing: Direction
+		get() = cachedState[MinerBlock.FACING]
+
+	private val invProxy = MinerInvProxy(this)
+
+	override fun handle(packet: Packet) {
+		when (packet) {
+			is RequestInventoryPacket -> handleRequestInventory(packet)
+			is LocateStackPacket -> handleLocateStack(packet)
+			is ExtractStackPacket -> handleExtractStack(packet)
+		}
+	}
+
+	private fun handleRequestInventory(packet: RequestInventoryPacket) {
+		sendPacket(ReadInventoryPacket(invProxy, ipAddress, packet.source))
+	}
+
+	private fun handleLocateStack(packet: LocateStackPacket) {
+		val amount = invProxy.getAmount(packet.stack)
+		if (amount > 0) {
+			sendPacket(StackLocationPacket(packet.stack, amount, this, ipAddress, packet.source))
+		}
+	}
+
+	private fun handleExtractStack(packet: ExtractStackPacket) {
+		// always recalculate immediately before breaking
+		val drops = invProxy.getDrops(true)
+		if (invProxy.getAmount(packet.stack) > 0) {
+			world!!.breakBlock(pos.offset(facing), false)
+
+			// send the requested amount back to the requester
+			var remaining = packet.amount
+			for (droppedStack in drops) {
+				if (remaining <= 0) {
+					break
+				}
+				if (!ItemStackUtil.areEqualIgnoreAmounts(droppedStack, packet.stack)) {
+					continue
+				}
+				val copy = droppedStack.copy()
+
+				val toDecr = min(droppedStack.count, remaining)
+				droppedStack.decrement(toDecr)
+				remaining -= toDecr
+
+				// todo: should this try to combine stacks and send as few packets as possible?
+				copy.count = toDecr
+				sendPacket(ItemStackPacket(copy, ipAddress, packet.source))
+			}
+
+			// dump any remaining drops into the network
+			for (droppedStack in drops) {
+				if (droppedStack.isEmpty) continue
+				sendPacket(ItemStackPacket(droppedStack, ipAddress, IPAddress.BROADCAST))
+			}
+		}
+	}
+
+	class MinerInvProxy(val miner: MinerBlockEntity): GroupedItemInvView {
+		private var cachedState: BlockState? = null
+		private var cachedDrops: List<ItemStack>? = null
+
+		private val world: World
+			get() = miner.world!!
+		private val pos: BlockPos
+			get() = miner.pos!!
+		private val facing: Direction
+			get() = miner.facing
+
+		fun getDrops(recalculate: Boolean = false): List<ItemStack> {
+			val targetPos = pos.offset(facing)
+			val realState = world.getBlockState(targetPos)
+			// todo: does BlockState.equals actually work?
+			if (cachedDrops == null || realState != cachedState || recalculate) {
+				cachedState = realState
+				val be = if (realState.block.hasBlockEntity()) world.getBlockEntity(targetPos) else null
+				cachedDrops = Block.getDroppedStacks(realState, world as ServerWorld, targetPos, be)
+			}
+			return cachedDrops!!
+		}
+
+		override fun getStoredStacks(): Set<ItemStack> {
+			return getDrops().toSet()
+		}
+
+		override fun getTotalCapacity(): Int {
+			return Int.MAX_VALUE
+		}
+
+		override fun getStatistics(filter: ItemFilter): GroupedItemInvView.ItemInvStatistic {
+			var totalCount = 0
+			for (s in getDrops()) {
+				if (filter.matches(s)) {
+					totalCount += s.count
+				}
+			}
+			return GroupedItemInvView.ItemInvStatistic(filter, totalCount, 0, Int.MAX_VALUE)
+		}
+	}
+
+}

src/main/kotlin/net/shadowfacts/phycon/network/block/netinterface/InterfaceBlock.kt

@@ -2,10 +2,7 @@ package net.shadowfacts.phycon.network.block.netinterface
 
 import alexiil.mc.lib.attributes.AttributeList
 import alexiil.mc.lib.attributes.AttributeProvider
-import net.minecraft.block.Block
-import net.minecraft.block.BlockState
-import net.minecraft.block.Material
-import net.minecraft.block.ShapeContext
+import net.minecraft.block.*
 import net.minecraft.entity.LivingEntity
 import net.minecraft.item.ItemPlacementContext
 import net.minecraft.item.ItemStack
@@ -21,15 +18,19 @@ import net.minecraft.world.BlockView
 import net.minecraft.world.World
 import net.minecraft.world.WorldAccess
 import net.shadowfacts.phycon.PhysicalConnectivity
-import net.shadowfacts.phycon.api.NetworkComponent
-import net.shadowfacts.phycon.block.BlockWithEntity
+import net.shadowfacts.phycon.api.NetworkComponentBlock
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.network.DeviceBlock
 import net.shadowfacts.phycon.network.block.cable.CableBlock
 import java.util.*
 
 /**
  * @author shadowfacts
  */
-class InterfaceBlock: BlockWithEntity<InterfaceBlockEntity>(Settings.of(Material.METAL)), NetworkComponent, AttributeProvider {
+class InterfaceBlock: DeviceBlock<InterfaceBlockEntity>(Settings.of(Material.METAL)),
+	NetworkComponentBlock,
+	AttributeProvider {
+
 	companion object {
 		val ID = Identifier(PhysicalConnectivity.MODID, "network_interface")
 		val FACING = Properties.FACING
@@ -63,7 +64,17 @@ class InterfaceBlock: BlockWithEntity<InterfaceBlockEntity>(Settings.of(Material
 	}
 
 	override fun getNetworkConnectedSides(state: BlockState, world: World, pos: BlockPos): Collection<Direction> {
-		return EnumSet.of(state[CABLE_CONNECTION])
+		val set = EnumSet.of(state[CABLE_CONNECTION])
+		set.remove(state[FACING])
+		return set
+	}
+
+	override fun getNetworkInterfaceForSide(side: Direction, state: BlockState, world: World, pos: BlockPos): Interface? {
+		return if (side == state[FACING]) {
+			null
+		} else {
+			getBlockEntity(world, pos)
+		}
 	}
 
 	override fun appendProperties(builder: StateManager.Builder<Block, BlockState>) {
@@ -83,7 +94,7 @@ class InterfaceBlock: BlockWithEntity<InterfaceBlockEntity>(Settings.of(Material
 	private fun getCableConnectionSide(world: World, pos: BlockPos): Direction? {
 		for (side in Direction.values()) {
 			val offsetPos = pos.offset(side)
-			if (world.getBlockState(offsetPos).block is NetworkComponent) {
+			if (world.getBlockState(offsetPos).block is NetworkComponentBlock) {
 				return side
 			}
 		}
@@ -103,7 +114,7 @@ class InterfaceBlock: BlockWithEntity<InterfaceBlockEntity>(Settings.of(Material
 	}
 
 	override fun getStateForNeighborUpdate(state: BlockState, side: Direction, neighborState: BlockState, world: WorldAccess, pos: BlockPos, neighborPos: BlockPos): BlockState {
-		if (neighborState.block is NetworkComponent && world.getBlockState(pos.offset(state[CABLE_CONNECTION])).block !is NetworkComponent) {
+		if (neighborState.block is NetworkComponentBlock && world.getBlockState(pos.offset(state[CABLE_CONNECTION])).block !is NetworkComponentBlock) {
 			return state.with(CABLE_CONNECTION, side)
 		}
 		return state

src/main/kotlin/net/shadowfacts/phycon/network/block/netinterface/InterfaceBlockEntity.kt

@@ -10,16 +10,21 @@ import net.shadowfacts.phycon.api.packet.Packet
 import net.shadowfacts.phycon.init.PhyBlockEntities
 import net.shadowfacts.phycon.network.DeviceBlockEntity
 import net.shadowfacts.phycon.network.component.ItemStackPacketHandler
+import net.shadowfacts.phycon.network.component.NetworkStackProvider
+import net.shadowfacts.phycon.network.component.NetworkStackReceiver
 import net.shadowfacts.phycon.network.component.handleItemStack
 import net.shadowfacts.phycon.network.packet.*
 
 /**
  * @author shadowfacts
  */
-class InterfaceBlockEntity: DeviceBlockEntity(PhyBlockEntities.INTERFACE), ItemStackPacketHandler {
+class InterfaceBlockEntity: DeviceBlockEntity(PhyBlockEntities.INTERFACE),
+	ItemStackPacketHandler,
+	NetworkStackProvider,
+	NetworkStackReceiver {
 
 	private val facing: Direction
-		get() = world!!.getBlockState(pos)[InterfaceBlock.FACING]
+		get() = cachedState[InterfaceBlock.FACING]
 
 	// todo: should this be a weak ref?
 	private var inventory: GroupedItemInv? = null
@@ -37,7 +42,7 @@ class InterfaceBlockEntity: DeviceBlockEntity(PhyBlockEntities.INTERFACE), ItemS
 		return inventory
 	}
 
-	override fun handlePacket(packet: Packet) {
+	override fun handle(packet: Packet) {
 		when (packet) {
 			is RequestInventoryPacket -> handleRequestInventory(packet)
 			is LocateStackPacket -> handleLocateStack(packet)
@@ -49,21 +54,21 @@ class InterfaceBlockEntity: DeviceBlockEntity(PhyBlockEntities.INTERFACE), ItemS
 
 	private fun handleRequestInventory(packet: RequestInventoryPacket) {
 		getInventory()?.also { inv ->
-			sendToSingle(ReadInventoryPacket(inv, macAddress, packet.source))
+			sendPacket(ReadInventoryPacket(inv, ipAddress, packet.source))
 		}
 	}
 
 	private fun handleLocateStack(packet: LocateStackPacket) {
 		getInventory()?.also { inv ->
 			val amount = inv.getAmount(packet.stack)
-			sendToSingle(StackLocationPacket(packet.stack, amount, this, macAddress, packet.source))
+			sendPacket(StackLocationPacket(packet.stack, amount, this, ipAddress, packet.source))
 		}
 	}
 
 	private fun handleExtractStack(packet: ExtractStackPacket) {
 		getInventory()?.also { inv ->
 			val extracted = inv.extract(packet.stack, packet.amount)
-			sendToSingle(ItemStackPacket(extracted, macAddress, packet.source))
+			sendPacket(ItemStackPacket(extracted, ipAddress, packet.source))
 		}
 	}
 
@@ -71,7 +76,7 @@ class InterfaceBlockEntity: DeviceBlockEntity(PhyBlockEntities.INTERFACE), ItemS
 		getInventory()?.also { inv ->
 			val remaining = inv.attemptInsertion(packet.stack, Simulation.SIMULATE)
 			val couldAccept = packet.stack.count - remaining.count
-			sendToSingle(CapacityPacket(packet.stack, couldAccept, this, macAddress, packet.source))
+			sendPacket(CapacityPacket(packet.stack, couldAccept, this, ipAddress, packet.source))
 		}
 	}
 

src/main/kotlin/net/shadowfacts/phycon/network/block/netswitch/SwitchBlock.kt

@@ -10,14 +10,18 @@ import net.minecraft.util.math.Direction
 import net.minecraft.world.BlockView
 import net.minecraft.world.World
 import net.shadowfacts.phycon.PhysicalConnectivity
-import net.shadowfacts.phycon.api.NetworkComponent
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.api.NetworkComponentBlock
 import net.shadowfacts.phycon.block.BlockWithEntity
 import java.util.*
 
 /**
  * @author shadowfacts
  */
-class SwitchBlock: BlockWithEntity<SwitchBlockEntity>(Settings.of(Material.METAL)), NetworkComponent, AttributeProvider {
+class SwitchBlock: BlockWithEntity<SwitchBlockEntity>(Settings.of(Material.METAL)),
+	NetworkComponentBlock,
+	AttributeProvider {
+
 	companion object {
 		val ID = Identifier(PhysicalConnectivity.MODID, "switch")
 	}
@@ -26,6 +30,10 @@ class SwitchBlock: BlockWithEntity<SwitchBlockEntity>(Settings.of(Material.METAL
 		return EnumSet.allOf(Direction::class.java)
 	}
 
+	override fun getNetworkInterfaceForSide(side: Direction, state: BlockState, world: World, pos: BlockPos): Interface? {
+		return getBlockEntity(world, pos)?.interfaces?.find { it.side == side }
+	}
+
 	override fun createBlockEntity(world: BlockView) = SwitchBlockEntity()
 
 	override fun addAllAttributes(world: World, pos: BlockPos, state: BlockState, to: AttributeList<*>) {

src/main/kotlin/net/shadowfacts/phycon/network/block/netswitch/SwitchBlockEntity.kt

@@ -1,82 +1,119 @@
 package net.shadowfacts.phycon.network.block.netswitch
 
+import net.fabricmc.fabric.api.block.entity.BlockEntityClientSerializable
+import net.minecraft.block.BlockState
+import net.minecraft.block.entity.BlockEntity
 import net.minecraft.entity.ItemEntity
+import net.minecraft.nbt.CompoundTag
 import net.minecraft.util.Tickable
 import net.minecraft.util.math.Direction
-import net.shadowfacts.phycon.api.PacketSink
-import net.shadowfacts.phycon.api.packet.Packet
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.api.frame.EthernetFrame
+import net.shadowfacts.phycon.api.frame.PacketFrame
 import net.shadowfacts.phycon.api.util.MACAddress
 import net.shadowfacts.phycon.init.PhyBlockEntities
-import net.shadowfacts.phycon.network.DeviceBlockEntity
 import net.shadowfacts.phycon.network.NetworkUtil
 import net.shadowfacts.phycon.network.packet.ItemStackPacket
-import java.lang.RuntimeException
+import java.lang.ref.WeakReference
 
 /**
  * @author shadowfacts
  */
-class SwitchBlockEntity: DeviceBlockEntity(PhyBlockEntities.SWITCH), Tickable {
+class SwitchBlockEntity: BlockEntity(PhyBlockEntities.SWITCH),
+	BlockEntityClientSerializable,
+	Tickable {
 
 	companion object {
-		var SWITCHING_CAPACITY = 256
+		var SWITCHING_CAPACITY = 256 // 256 items/tick
 	}
 
+	val interfaces = Direction.values().map { SwitchInterface(it, WeakReference(this), MACAddress.random()) }
+
 	private val macTable = mutableMapOf<MACAddress, Direction>()
-	private var packetsHandledThisTick = 0
+	private var itemsHandledThisTick = 0
 
-	override fun acceptsPacket(packet: Packet) = true
+	fun interfaceForSide(side: Direction): SwitchInterface {
+		return interfaces.find { it.side == side }!!
+	}
 
-	override fun handlePacket(packet: Packet) {
-		if (packetsHandledThisTick >= SWITCHING_CAPACITY) {
-			if (packet is ItemStackPacket) {
+	private fun handle(frame: EthernetFrame, fromItf: SwitchInterface) {
+		macTable[frame.source] = fromItf.side
+
+		if (frame is PacketFrame && frame.packet is ItemStackPacket) {
+			val packet = frame.packet as ItemStackPacket
+			if (itemsHandledThisTick + packet.stack.count > SWITCHING_CAPACITY) {
 				// todo: calculate entity spawn point by finding non-obstructed location
 				val entity = ItemEntity(world!!, pos.x.toDouble(), pos.y + 1.0, pos.z.toDouble(), packet.stack)
 				world!!.spawnEntity(entity)
-			}
 				return
-		}
-
-		packetsHandledThisTick++
-
-		if (packet.destination == MACAddress.BROADCAST) {
-			val allDestinations = NetworkUtil.findDestinations(world!!, pos).filter { it.macAddress != packet.source }
-			sendToAll(packet, allDestinations)
 			} else {
-			val direction = macTable[packet.destination]
-			if (direction != null) {
-				val dest = findDestination(direction)
-				if (dest != null && packet.destination == dest.macAddress) {
-					send(packet, dest)
-					return
-				}
-			}
-			flood(packet)
+				itemsHandledThisTick += packet.stack.count
 			}
 		}
 
-	private fun findDestination(direction: Direction): PacketSink? {
-		val allDestinations = NetworkUtil.findDestinations(world!!, pos, direction)
-		if (allDestinations.size > 1) {
-			// todo: do this better
-			println("Can't send packet, multiple destinations: $allDestinations")
-			return null
+		if (frame.destination.type != MACAddress.Type.BROADCAST && macTable.containsKey(frame.destination)) {
+			val dir = macTable[frame.destination]!!
+			println("$this (${fromItf.side}, ${fromItf.macAddress}) forwarding $frame to side $dir")
+			interfaceForSide(dir).send(frame)
+		} else {
+			println("$this (${fromItf.side}, ${fromItf.macAddress}) flooding $frame")
+			flood(frame, fromItf)
 		}
-		return allDestinations.firstOrNull()
 	}
 
-	private fun flood(packet: Packet) {
-		for (dir in Direction.values()) {
-			val dest = findDestination(dir)
-			if (dest != null && packet.destination == dest.macAddress) {
-				macTable[packet.destination] = dir
-				send(packet, dest)
-				break
+	private fun flood(frame: EthernetFrame, source: Interface) {
+		for (itf in interfaces) {
+			if (source == itf) continue
+			itf.send(frame)
 		}
 	}
+
+	private fun findDestination(fromItf: Interface): Interface? {
+		val side = (fromItf as SwitchInterface).side
+		return NetworkUtil.findConnectedInterface(world!!, pos, side)
 	}
 
 	override fun tick() {
-		packetsHandledThisTick = 0
+		itemsHandledThisTick = 0
+	}
+
+	override fun toTag(tag: CompoundTag): CompoundTag {
+		tag.putLongArray("InterfaceAddresses", interfaces.map { it.macAddress.address })
+		return super.toTag(tag)
+	}
+
+	override fun fromTag(state: BlockState, tag: CompoundTag) {
+		super.fromTag(state, tag)
+		tag.getLongArray("InterfaceAddresses")?.forEachIndexed { i, l ->
+			interfaces[i].macAddress = MACAddress(l)
+		}
+	}
+
+	override fun toClientTag(tag: CompoundTag): CompoundTag {
+		tag.putLongArray("InterfaceAddresses", interfaces.map { it.macAddress.address })
+		return tag
+	}
+
+	override fun fromClientTag(tag: CompoundTag) {
+		tag.getLongArray("InterfaceAddresses")?.forEachIndexed { i, l ->
+			interfaces[i].macAddress = MACAddress(l)
+		}
+	}
+
+	class SwitchInterface(
+		val side: Direction,
+		val switch: WeakReference<SwitchBlockEntity>,
+		@JvmField var macAddress: MACAddress,
+	): Interface {
+		override fun getMACAddress() = macAddress
+
+		override fun receive(frame: EthernetFrame) {
+			switch.get()?.handle(frame, this)
+		}
+
+		override fun send(frame: EthernetFrame) {
+			switch.get()?.findDestination(this)?.receive(frame)
+		}
 	}
 
 }

src/main/kotlin/net/shadowfacts/phycon/network/block/terminal/TerminalBlock.kt

@@ -14,14 +14,17 @@ import net.minecraft.util.math.Direction
 import net.minecraft.world.BlockView
 import net.minecraft.world.World
 import net.shadowfacts.phycon.PhysicalConnectivity
-import net.shadowfacts.phycon.api.NetworkComponent
-import net.shadowfacts.phycon.block.BlockWithEntity
+import net.shadowfacts.phycon.api.NetworkComponentBlock
+import net.shadowfacts.phycon.network.DeviceBlock
 import java.util.*
 
 /**
  * @author shadowfacts
  */
-class TerminalBlock: BlockWithEntity<TerminalBlockEntity>(Settings.of(Material.METAL)), NetworkComponent, AttributeProvider {
+class TerminalBlock: DeviceBlock<TerminalBlockEntity>(Settings.of(Material.METAL)),
+	NetworkComponentBlock,
+	AttributeProvider {
+
 	companion object {
 		val ID = Identifier(PhysicalConnectivity.MODID, "terminal")
 	}

src/main/kotlin/net/shadowfacts/phycon/network/block/terminal/TerminalBlockEntity.kt

@@ -1,6 +1,6 @@
 package net.shadowfacts.phycon.network.block.terminal
 
-import alexiil.mc.lib.attributes.item.GroupedItemInv
+import alexiil.mc.lib.attributes.item.GroupedItemInvView
 import alexiil.mc.lib.attributes.item.ItemStackCollections
 import alexiil.mc.lib.attributes.item.ItemStackUtil
 import it.unimi.dsi.fastutil.ints.Int2ObjectArrayMap
@@ -17,14 +17,18 @@ import net.minecraft.nbt.ListTag
 import net.minecraft.network.PacketByteBuf
 import net.minecraft.screen.ScreenHandler
 import net.minecraft.server.network.ServerPlayerEntity
-import net.minecraft.text.LiteralText
+import net.minecraft.text.TranslatableText
 import net.minecraft.util.Tickable
+import net.minecraft.util.math.Direction
+import net.shadowfacts.phycon.api.Interface
 import net.shadowfacts.phycon.api.packet.Packet
-import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.api.util.IPAddress
 import net.shadowfacts.phycon.init.PhyBlockEntities
 import net.shadowfacts.phycon.network.DeviceBlockEntity
-import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlockEntity
+import net.shadowfacts.phycon.network.NetworkUtil
 import net.shadowfacts.phycon.network.component.ItemStackPacketHandler
+import net.shadowfacts.phycon.network.component.NetworkStackProvider
+import net.shadowfacts.phycon.network.component.NetworkStackReceiver
 import net.shadowfacts.phycon.network.component.handleItemStack
 import net.shadowfacts.phycon.network.packet.*
 import java.util.*
@@ -40,7 +44,7 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
         val INSERTION_TIMEOUT = 40
 	}
 
-	private val inventoryCache = mutableMapOf<MACAddress, GroupedItemInv>()
+	private val inventoryCache = mutableMapOf<IPAddress, GroupedItemInvView>()
 	val internalBuffer = TerminalBufferInventory(18)
 
 	private val locateRequestQueue = LinkedList<StackLocateRequest>()
@@ -50,13 +54,22 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 	private var observers = 0
 	val cachedNetItems = ItemStackCollections.intMap()
 	var cachedSortedNetItems = listOf<ItemStack>()
-	var counter = 0
 
 	init {
 		internalBuffer.addListener(this)
 	}
 
-	override fun handlePacket(packet: Packet) {
+	override fun findDestination(): Interface? {
+		for (dir in Direction.values()) {
+			val itf = NetworkUtil.findConnectedInterface(world!!, pos, dir)
+			if (itf != null) {
+				return itf
+			}
+		}
+		return null
+	}
+
+	override fun handle(packet: Packet) {
 		when (packet) {
 			is ReadInventoryPacket -> handleReadInventory(packet)
 			is DeviceRemovedPacket -> handleDeviceRemoved(packet)
@@ -83,7 +96,7 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 			ItemStackUtil.areEqualIgnoreAmounts(it.stack, packet.stack)
 		}
 		if (request != null) {
-			request.results.add(packet.amount to packet.sourceInterface)
+			request.results.add(packet.amount to packet.stackProvider)
 			if (request.totalResultAmount >= request.amount || counter - request.timestamp >= LOCATE_REQUEST_TIMEOUT || request.results.size >= inventoryCache.size) {
 				stackLocateRequestCompleted(request)
 			}
@@ -106,7 +119,7 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 			ItemStackUtil.areEqualIgnoreAmounts(packet.stack, it.stack)
 		}
 		if (insertion != null) {
-			insertion.results.add(packet.capacity to packet.receivingInterface)
+			insertion.results.add(packet.capacity to packet.stackReceiver)
 			if (insertion.isFinishable(counter)) {
 				finishInsertion(insertion)
 			}
@@ -137,7 +150,7 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 			if (slot in pendingInsertions) continue
 			val stack = internalBuffer.getStack(slot)
 			pendingInsertions[slot] = PendingStackInsertion(slot, stack, counter)
-			sendToSingle(CheckCapacityPacket(stack, macAddress, MACAddress.BROADCAST))
+			sendPacket(CheckCapacityPacket(stack, ipAddress, IPAddress.BROADCAST))
 		}
 	}
 
@@ -155,7 +168,7 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 
 		for (request in locateRequestQueue) {
 			pendingRequests.add(request)
-			sendToSingle(LocateStackPacket(request.stack, macAddress))
+			sendPacket(LocateStackPacket(request.stack, ipAddress))
 		}
 		locateRequestQueue.clear()
 	}
@@ -179,19 +192,26 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 	}
 
 	override fun tick() {
-		if (observers > 0 && (++counter % 10) == 0) {
-			if (world!!.isClient) {
-				println(cachedNetItems)
-			} else {
-				updateNetItems()
+		super.tick()
+
+		if (counter % 20 == 0L) {
+			if (!world!!.isClient) {
 				sendEnqueuedLocateRequests()
 				finishPendingRequests()
 				beginInsertions()
 				finishPendingInsertions()
+			}
+
+			if (observers > 0) {
+				if (world!!.isClient) {
+					println(cachedNetItems)
+				} else {
+					updateNetItems()
 					sync()
 				}
 			}
 		}
+	}
 
 	fun onActivate(player: PlayerEntity) {
 		if (!world!!.isClient) {
@@ -199,13 +219,13 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 			sync()
 
 			inventoryCache.clear()
-			sendToSingle(RequestInventoryPacket(macAddress))
+			sendPacket(RequestInventoryPacket(ipAddress))
 			val factory = object: ExtendedScreenHandlerFactory {
 				override fun createMenu(syncId: Int, playerInv: PlayerInventory, player: PlayerEntity): ScreenHandler? {
 					return TerminalScreenHandler(syncId, playerInv, this@TerminalBlockEntity)
 				}
 
-				override fun getDisplayName() = LiteralText("Terminal")
+				override fun getDisplayName() = TranslatableText("block.phycon.terminal")
 
 				override fun writeScreenOpeningData(player: ServerPlayerEntity, buf: PacketByteBuf) {
 					buf.writeBlockPos(this@TerminalBlockEntity.pos)
@@ -230,7 +250,7 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 			val (sourceAmount, sourceInterface) = sortedResults.removeAt(0)
 			val amountToRequest = min(sourceAmount, request.amount - amountRequested)
 			amountRequested += amountToRequest
-			sendToSingle(ExtractStackPacket(request.stack, amountToRequest, macAddress, sourceInterface.macAddress))
+			sendPacket(ExtractStackPacket(request.stack, amountToRequest, ipAddress, sourceInterface.ipAddress))
 		}
 	}
 
@@ -243,7 +263,7 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 		while (!remaining.isEmpty && sortedResults.isNotEmpty()) {
 			val (capacity, receivingInterface) = sortedResults.removeAt(0)
 			if (capacity <= 0) continue
-			sendToSingle(ItemStackPacket(remaining.copy(), macAddress, receivingInterface.macAddress))
+			sendPacket(ItemStackPacket(remaining.copy(), ipAddress, receivingInterface.ipAddress))
 			// todo: the interface should confirm how much was actually inserted, in case of race condition
 			remaining.count -= capacity
 		}
@@ -304,27 +324,27 @@ class TerminalBlockEntity: DeviceBlockEntity(PhyBlockEntities.TERMINAL), Invento
 data class StackLocateRequest(
 		val stack: ItemStack,
 		val amount: Int,
-		val timestamp: Int,
-		var results: MutableSet<Pair<Int, InterfaceBlockEntity>> = mutableSetOf()
+		val timestamp: Long,
+		var results: MutableSet<Pair<Int, NetworkStackProvider>> = mutableSetOf()
 ) {
 	val totalResultAmount: Int
 		get() = results.fold(0) { acc, (amount, _) -> acc + amount }
 
-	fun isFinishable(currentTimestamp: Int): Boolean {
-		return totalResultAmount > amount || currentTimestamp - timestamp >= TerminalBlockEntity.LOCATE_REQUEST_TIMEOUT
+	fun isFinishable(currentTimestamp: Long): Boolean {
+		return totalResultAmount >= amount || currentTimestamp - timestamp >= TerminalBlockEntity.LOCATE_REQUEST_TIMEOUT
 	}
 }
 
 data class PendingStackInsertion(
 	val bufferSlot: Int,
 	val stack: ItemStack,
-	val timestamp: Int,
-	val results: MutableSet<Pair<Int, InterfaceBlockEntity>> = mutableSetOf(),
+	val timestamp: Long,
+	val results: MutableSet<Pair<Int, NetworkStackReceiver>> = mutableSetOf(),
 ) {
 	val totalCapacity: Int
 		get() = results.fold(0) { acc, (amount, _) -> acc + amount }
 
-	fun isFinishable(currentTimestamp: Int): Boolean {
-		return totalCapacity > stack.count || currentTimestamp - timestamp >= TerminalBlockEntity.INSERTION_TIMEOUT
+	fun isFinishable(currentTimestamp: Long): Boolean {
+		return totalCapacity >= stack.count || currentTimestamp - timestamp >= TerminalBlockEntity.INSERTION_TIMEOUT
 	}
 }

src/main/kotlin/net/shadowfacts/phycon/network/block/terminal/TerminalScreen.kt

@@ -6,7 +6,6 @@ import net.minecraft.client.gui.screen.ingame.HandledScreen
 import net.minecraft.client.util.math.MatrixStack
 import net.minecraft.entity.player.PlayerInventory
 import net.minecraft.screen.slot.Slot
-import net.minecraft.text.LiteralText
 import net.minecraft.text.Text
 import net.minecraft.util.Identifier
 import net.shadowfacts.phycon.PhysicalConnectivity
@@ -33,6 +32,8 @@ class TerminalScreen(handler: TerminalScreenHandler, playerInv: PlayerInventory,
 	}
 
 	override fun drawBackground(matrixStack: MatrixStack, delta: Float, mouseX: Int, mouseY: Int) {
+		renderBackground(matrixStack)
+
 		GlStateManager.color4f(1f, 1f, 1f, 1f)
 		client!!.textureManager.bindTexture(BACKGROUND)
 		val x = (width - backgroundWidth) / 2
@@ -40,6 +41,11 @@ class TerminalScreen(handler: TerminalScreenHandler, playerInv: PlayerInventory,
 		drawTexture(matrixStack, x, y, 0, 0, backgroundWidth, backgroundHeight)
 	}
 
+	override fun render(matrixStack: MatrixStack, mouseX: Int, mouseY: Int, delta: Float) {
+		super.render(matrixStack, mouseX, mouseY, delta)
+		drawMouseoverTooltip(matrixStack, mouseX, mouseY)
+	}
+
 	@ExperimentalUnsignedTypes
 	fun drawSlotUnderlay(matrixStack: MatrixStack, slot: Slot) {
 		if (!handler.isBufferSlot(slot.id)) {

src/main/kotlin/net/shadowfacts/phycon/network/block/test/DestBlock.kt

@@ -0,0 +1,46 @@
+package net.shadowfacts.phycon.network.block.test
+
+import net.minecraft.block.BlockState
+import net.minecraft.block.Material
+import net.minecraft.entity.player.PlayerEntity
+import net.minecraft.util.ActionResult
+import net.minecraft.util.Hand
+import net.minecraft.util.Identifier
+import net.minecraft.util.hit.BlockHitResult
+import net.minecraft.util.math.BlockPos
+import net.minecraft.util.math.Direction
+import net.minecraft.world.BlockView
+import net.minecraft.world.World
+import net.shadowfacts.phycon.PhysicalConnectivity
+import net.shadowfacts.phycon.network.DeviceBlock
+import java.util.*
+
+/**
+ * @author shadowfacts
+ */
+class DestBlock: DeviceBlock<DestBlockEntity>(Settings.of(Material.METAL)) {
+
+	companion object {
+		val ID = Identifier(PhysicalConnectivity.MODID, "dest")
+	}
+
+	override fun createBlockEntity(world: BlockView): DestBlockEntity {
+		return DestBlockEntity()
+	}
+
+	override fun getNetworkConnectedSides(state: BlockState, world: World, pos: BlockPos): MutableCollection<Direction> {
+		return EnumSet.allOf(Direction::class.java)
+	}
+
+	override fun onUse(
+		blockState: BlockState?,
+		world: World,
+		pos: BlockPos,
+		playerEntity: PlayerEntity?,
+		hand: Hand?,
+		blockHitResult: BlockHitResult?
+	): ActionResult {
+		println("dest IP: ${getBlockEntity(world, pos)!!.ipAddress}")
+		return ActionResult.SUCCESS
+	}
+}

src/main/kotlin/net/shadowfacts/phycon/network/block/test/DestBlockEntity.kt

@@ -0,0 +1,29 @@
+package net.shadowfacts.phycon.network.block.test
+
+import net.minecraft.util.math.Direction
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.api.packet.Packet
+import net.shadowfacts.phycon.init.PhyBlockEntities
+import net.shadowfacts.phycon.network.DeviceBlockEntity
+import net.shadowfacts.phycon.network.NetworkUtil
+
+/**
+ * @author shadowfacts
+ */
+class DestBlockEntity: DeviceBlockEntity(PhyBlockEntities.DEST) {
+
+	override fun handle(packet: Packet) {
+		println("$this ($ipAddress) received packet: $packet")
+	}
+
+	override fun findDestination(): Interface? {
+		for (dir in Direction.values()) {
+			val itf = NetworkUtil.findConnectedInterface(world!!, pos, dir)
+			if (itf != null) {
+				return itf
+			}
+		}
+		return null
+	}
+
+}

src/main/kotlin/net/shadowfacts/phycon/network/block/test/SourceBlock.kt

@@ -0,0 +1,31 @@
+package net.shadowfacts.phycon.network.block.test
+
+import net.minecraft.block.BlockState
+import net.minecraft.block.Material
+import net.minecraft.util.Identifier
+import net.minecraft.util.math.BlockPos
+import net.minecraft.util.math.Direction
+import net.minecraft.world.BlockView
+import net.minecraft.world.World
+import net.shadowfacts.phycon.PhysicalConnectivity
+import net.shadowfacts.phycon.network.DeviceBlock
+import java.util.*
+
+/**
+ * @author shadowfacts
+ */
+class SourceBlock: DeviceBlock<SourceBlockEntity>(Settings.of(Material.METAL)) {
+
+	companion object {
+		val ID = Identifier(PhysicalConnectivity.MODID, "source")
+	}
+
+	override fun createBlockEntity(world: BlockView): SourceBlockEntity {
+		return SourceBlockEntity()
+	}
+
+	override fun getNetworkConnectedSides(state: BlockState, world: World, pos: BlockPos): MutableCollection<Direction> {
+		return EnumSet.allOf(Direction::class.java)
+	}
+
+}

src/main/kotlin/net/shadowfacts/phycon/network/block/test/SourceBlockEntity.kt

@@ -0,0 +1,38 @@
+package net.shadowfacts.phycon.network.block.test
+
+import net.minecraft.util.Tickable
+import net.minecraft.util.math.Direction
+import net.shadowfacts.phycon.api.Interface
+import net.shadowfacts.phycon.api.packet.Packet
+import net.shadowfacts.phycon.api.util.IPAddress
+import net.shadowfacts.phycon.init.PhyBlockEntities
+import net.shadowfacts.phycon.network.DeviceBlockEntity
+import net.shadowfacts.phycon.network.NetworkUtil
+
+/**
+ * @author shadowfacts
+ */
+class SourceBlockEntity: DeviceBlockEntity(PhyBlockEntities.SOURCE), Tickable {
+
+	override fun handle(packet: Packet) {
+		TODO("Not yet implemented")
+	}
+
+	override fun tick() {
+		super.tick()
+		if (!world!!.isClient && counter % 40 == 0L) {
+			sendPacket(TestPacket(ipAddress, IPAddress(170, 171, 101, 168)))
+		}
+	}
+
+	override fun findDestination(): Interface? {
+		for (dir in Direction.values()) {
+			val itf = NetworkUtil.findConnectedInterface(world!!, pos, dir)
+			if (itf != null) {
+				return itf
+			}
+		}
+		return null
+	}
+
+}

src/main/kotlin/net/shadowfacts/phycon/network/block/test/TestPacket.kt

@@ -0,0 +1,10 @@
+package net.shadowfacts.phycon.network.block.test
+
+import net.shadowfacts.phycon.api.util.IPAddress
+import net.shadowfacts.phycon.network.packet.BasePacket
+
+/**
+ * @author shadowfacts
+ */
+class TestPacket(source: IPAddress, destination: IPAddress): BasePacket(source, destination) {
+}

src/main/kotlin/net/shadowfacts/phycon/network/component/ItemStackPacketHandler.kt

@@ -26,6 +26,6 @@ fun <BE> BE.handleItemStack(packet: ItemStackPacket) where BE: BlockEntity, BE:
 	val remainder = doHandleItemStack(packet)
 	// if there are any items remaining, send them back to the source with incremented bounce count
 	if (!remainder.isEmpty) {
-		sendToSingle(ItemStackPacket(remainder, packet.bounceCount + 1, macAddress, packet.source))
+//		sendToSingle(ItemStackPacket(remainder, packet.bounceCount + 1, macAddress, packet.source))
 	}
 }

src/main/kotlin/net/shadowfacts/phycon/network/component/NetworkStackProvider.kt

@@ -0,0 +1,9 @@
+package net.shadowfacts.phycon.network.component
+
+import net.shadowfacts.phycon.api.NetworkDevice
+
+/**
+ * @author shadowfacts
+ */
+interface NetworkStackProvider: NetworkDevice {
+}

src/main/kotlin/net/shadowfacts/phycon/network/component/NetworkStackReceiver.kt

@@ -0,0 +1,9 @@
+package net.shadowfacts.phycon.network.component
+
+import net.shadowfacts.phycon.api.NetworkDevice
+
+/**
+ * @author shadowfacts
+ */
+interface NetworkStackReceiver: NetworkDevice {
+}

src/main/kotlin/net/shadowfacts/phycon/network/frame/ARPFrame.kt

@@ -0,0 +1,22 @@
+package net.shadowfacts.phycon.network.frame
+
+import net.shadowfacts.phycon.api.util.IPAddress
+import net.shadowfacts.phycon.api.util.MACAddress
+
+/**
+ * @author shadowfacts
+ */
+class ARPQueryFrame(
+	val queryIP: IPAddress,
+	val sourceIP: IPAddress,
+	source: MACAddress,
+): BaseFrame(source, MACAddress.BROADCAST) {
+}
+
+
+class ARPResponseFrame(
+	val query: IPAddress,
+	source: MACAddress,
+	destination: MACAddress,
+): BaseFrame(source, destination) {
+}

src/main/kotlin/net/shadowfacts/phycon/network/frame/BaseFrame.kt

@@ -0,0 +1,17 @@
+package net.shadowfacts.phycon.network.frame
+
+import net.shadowfacts.phycon.api.frame.EthernetFrame
+import net.shadowfacts.phycon.api.frame.PacketFrame
+import net.shadowfacts.phycon.api.packet.Packet
+import net.shadowfacts.phycon.api.util.MACAddress
+
+/**
+ * @author shadowfacts
+ */
+open class BaseFrame(
+	@JvmField private val source: MACAddress,
+	@JvmField private val destination: MACAddress
+): EthernetFrame {
+	override fun getSource() = source
+	override fun getDestination() = destination
+}

src/main/kotlin/net/shadowfacts/phycon/network/frame/BasePacketFrame.kt

@@ -0,0 +1,16 @@
+package net.shadowfacts.phycon.network.frame
+
+import net.shadowfacts.phycon.api.frame.PacketFrame
+import net.shadowfacts.phycon.api.packet.Packet
+import net.shadowfacts.phycon.api.util.MACAddress
+
+/**
+ * @author shadowfacts
+ */
+class BasePacketFrame(
+	@JvmField private val packet: Packet,
+	source: MACAddress,
+	destination: MACAddress,
+): BaseFrame(source, destination), PacketFrame {
+	override fun getPacket() = packet
+}

src/main/kotlin/net/shadowfacts/phycon/network/packet/BasePacket.kt

@@ -1,14 +1,14 @@
 package net.shadowfacts.phycon.network.packet
 
 import net.shadowfacts.phycon.api.packet.Packet
-import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.api.util.IPAddress
 
 /**
  * @author shadowfacts
  */
 abstract class BasePacket(
-		@JvmField private val source: MACAddress,
-		@JvmField private val destination: MACAddress
+	@JvmField private val source: IPAddress,
+	@JvmField private val destination: IPAddress
 ): Packet {
 
 	override fun getSource() = source

src/main/kotlin/net/shadowfacts/phycon/network/packet/CapacityPacket.kt

@@ -1,11 +1,17 @@
 package net.shadowfacts.phycon.network.packet
 
 import net.minecraft.item.ItemStack
-import net.shadowfacts.phycon.api.util.MACAddress
-import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlockEntity
+import net.shadowfacts.phycon.api.util.IPAddress
+import net.shadowfacts.phycon.network.component.NetworkStackReceiver
 
 /**
  * @author shadowfacts
  */
-class CapacityPacket(val stack: ItemStack, val capacity: Int, val receivingInterface: InterfaceBlockEntity, source: MACAddress, destination: MACAddress): BasePacket(source, destination) {
+class CapacityPacket(
+	val stack: ItemStack,
+	val capacity: Int,
+	val stackReceiver: NetworkStackReceiver,
+	source: IPAddress,
+	destination: IPAddress
+): BasePacket(source, destination) {
 }

src/main/kotlin/net/shadowfacts/phycon/network/packet/CheckCapacityPacket.kt

@@ -1,10 +1,10 @@
 package net.shadowfacts.phycon.network.packet
 
 import net.minecraft.item.ItemStack
-import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.api.util.IPAddress
 
 /**
  * @author shadowfacts
  */
-class CheckCapacityPacket(val stack: ItemStack, source: MACAddress, destination: MACAddress): BasePacket(source, destination) {
+class CheckCapacityPacket(val stack: ItemStack, source: IPAddress, destination: IPAddress): BasePacket(source, destination) {
 }

src/main/kotlin/net/shadowfacts/phycon/network/packet/DeviceRemovedPacket.kt

@@ -1,11 +1,11 @@
 package net.shadowfacts.phycon.network.packet
 
-import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.api.util.IPAddress
 import net.shadowfacts.phycon.network.DeviceBlockEntity
 
 /**
  * @author shadowfacts
  */
-class DeviceRemovedPacket(source: MACAddress, destination: MACAddress = MACAddress.BROADCAST): BasePacket(source, destination) {
-	constructor(device: DeviceBlockEntity): this(device.macAddress)
+class DeviceRemovedPacket(source: IPAddress, destination: IPAddress = IPAddress.BROADCAST): BasePacket(source, destination) {
+	constructor(device: DeviceBlockEntity): this(device.ipAddress)
 }

src/main/kotlin/net/shadowfacts/phycon/network/packet/ExtractStackPacket.kt

@@ -1,10 +1,10 @@
 package net.shadowfacts.phycon.network.packet
 
 import net.minecraft.item.ItemStack
-import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.api.util.IPAddress
 
 /**
  * @author shadowfacts
  */
-class ExtractStackPacket(val stack: ItemStack, val amount: Int, source: MACAddress, destination: MACAddress): BasePacket(source, destination) {
+class ExtractStackPacket(val stack: ItemStack, val amount: Int, source: IPAddress, destination: IPAddress): BasePacket(source, destination) {
 }

src/main/kotlin/net/shadowfacts/phycon/network/packet/ItemStackPacket.kt

@@ -1,11 +1,11 @@
 package net.shadowfacts.phycon.network.packet
 
 import net.minecraft.item.ItemStack
-import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.api.util.IPAddress
 
 /**
  * @author shadowfacts
  */
-class ItemStackPacket(val stack: ItemStack, val bounceCount: Int, source: MACAddress, destination: MACAddress): BasePacket(source, destination) {
-	constructor(stack: ItemStack, source: MACAddress, destination: MACAddress): this(stack, 0, source, destination)
+class ItemStackPacket(val stack: ItemStack, val bounceCount: Int, source: IPAddress, destination: IPAddress): BasePacket(source, destination) {
+	constructor(stack: ItemStack, source: IPAddress, destination: IPAddress): this(stack, 0, source, destination)
 }

src/main/kotlin/net/shadowfacts/phycon/network/packet/LocateStackPacket.kt

@@ -1,10 +1,10 @@
 package net.shadowfacts.phycon.network.packet
 
 import net.minecraft.item.ItemStack
-import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.api.util.IPAddress
 
 /**
  * @author shadowfacts
  */
-class LocateStackPacket(val stack: ItemStack, source: MACAddress, destination: MACAddress = MACAddress.BROADCAST): BasePacket(source, destination) {
+class LocateStackPacket(val stack: ItemStack, source: IPAddress, destination: IPAddress = IPAddress.BROADCAST): BasePacket(source, destination) {
 }

src/main/kotlin/net/shadowfacts/phycon/network/packet/ReadInventoryPacket.kt

@@ -1,13 +1,13 @@
 package net.shadowfacts.phycon.network.packet
 
-import alexiil.mc.lib.attributes.item.GroupedItemInv
-import net.shadowfacts.phycon.api.util.MACAddress
+import alexiil.mc.lib.attributes.item.GroupedItemInvView
+import net.shadowfacts.phycon.api.util.IPAddress
 
 /**
  * @author shadowfacts
  */
 class ReadInventoryPacket(
-		val inventory: GroupedItemInv,
-		source: MACAddress,
-		destination: MACAddress
+	val inventory: GroupedItemInvView,
+	source: IPAddress,
+	destination: IPAddress
 ): BasePacket(source, destination)

src/main/kotlin/net/shadowfacts/phycon/network/packet/RequestInventoryPacket.kt

@@ -1,8 +1,8 @@
 package net.shadowfacts.phycon.network.packet
 
-import net.shadowfacts.phycon.api.util.MACAddress
+import net.shadowfacts.phycon.api.util.IPAddress
 
 /**
  * @author shadowfacts
  */
-class RequestInventoryPacket(source: MACAddress, destination: MACAddress = MACAddress.BROADCAST): BasePacket(source, destination)
+class RequestInventoryPacket(source: IPAddress, destination: IPAddress = IPAddress.BROADCAST): BasePacket(source, destination)

src/main/kotlin/net/shadowfacts/phycon/network/packet/StackLocationPacket.kt

@@ -1,8 +1,8 @@
 package net.shadowfacts.phycon.network.packet
 
 import net.minecraft.item.ItemStack
-import net.shadowfacts.phycon.api.util.MACAddress
-import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlockEntity
+import net.shadowfacts.phycon.api.util.IPAddress
+import net.shadowfacts.phycon.network.component.NetworkStackProvider
 
 /**
  * @author shadowfacts
@@ -11,8 +11,8 @@ import net.shadowfacts.phycon.network.block.netinterface.InterfaceBlockEntity
 class StackLocationPacket(
 	val stack: ItemStack,
 	val amount: Int,
-		val sourceInterface: InterfaceBlockEntity,
-		source: MACAddress,
-		destination: MACAddress
+	val stackProvider: NetworkStackProvider,
+	source: IPAddress,
+	destination: IPAddress
 ): BasePacket(source, destination) {
 }

src/main/kotlin/net/shadowfacts/phycon/screen/DeviceConsoleScreen.kt

@@ -0,0 +1,38 @@
+package net.shadowfacts.phycon.screen
+
+import net.minecraft.client.gui.screen.Screen
+import net.minecraft.client.util.math.MatrixStack
+import net.minecraft.text.TranslatableText
+import net.shadowfacts.phycon.network.DeviceBlockEntity
+import org.lwjgl.glfw.GLFW
+
+/**
+ * @author shadowfacts
+ */
+class DeviceConsoleScreen(
+	val device: DeviceBlockEntity,
+): Screen(TranslatableText("item.phycon.onsole")) {
+
+	override fun init() {
+		super.init()
+	}
+
+	override fun isPauseScreen() = false
+
+	override fun keyPressed(key: Int, j: Int, k: Int): Boolean {
+		if (key == GLFW.GLFW_KEY_E) {
+			onClose();
+			return true;
+		}
+		return super.keyPressed(key, j, k)
+	}
+
+	override fun render(matrixStack: MatrixStack, mouseX: Int, mouseY: Int, delta: Float) {
+		renderBackground(matrixStack)
+
+		super.render(matrixStack, mouseX, mouseY, delta)
+
+		drawCenteredString(matrixStack, textRenderer, device.macAddress.toString(), width / 2, height / 2 - 5, 0xffffff)
+		drawCenteredString(matrixStack, textRenderer, device.ipAddress.toString(), width / 2, height / 2 + 5, 0xffffff)
+	}
+}

src/main/resources/assets/phycon/blockstates/extractor.json

@@ -0,0 +1,29 @@
+{
+  "variants": {
+    "facing=down": {
+      "model": "phycon:block/extractor"
+    },
+    "facing=up": {
+      "model": "phycon:block/extractor",
+      "x": 180
+    },
+    "facing=north": {
+      "model": "phycon:block/extractor",
+      "x": 270
+    },
+    "facing=south": {
+      "model": "phycon:block/extractor",
+      "x": 90
+    },
+    "facing=west": {
+      "model": "phycon:block/extractor",
+      "x": 90,
+      "y": 90
+    },
+    "facing=east": {
+      "model": "phycon:block/extractor",
+      "x": 90,
+      "y": 270
+    }
+  }
+}

src/main/resources/assets/phycon/lang/en_us.json

@@ -0,0 +1,11 @@
+{
+  "block.phycon.switch": "Network Switch",
+  "block.phycon.network_interface": "Inventory Interface",
+  "block.phycon.terminal": "Terminal",
+  "block.phycon.cable": "Cable",
+  "block.phycon.extractor": "Inventory Extractor",
+  "block.phycon.miner": "Block Miner",
+
+  "item.phycon.screwdriver": "Screwdriver",
+  "item.phycon.console": "Console"
+}

src/main/resources/assets/phycon/models/block/extractor.json

@@ -0,0 +1,50 @@
+{
+  "parent": "block/block",
+  "elements": [
+    {
+      "from": [0, 0, 0],
+      "to": [16, 2, 16],
+      "faces": {
+        "down": {"texture": "phycon:block/extractor_front"},
+        "up": {"texture": "phycon:block/extractor_back"},
+        "north": {"texture": "phycon:block/extractor_side"},
+        "south": {"texture": "phycon:block/extractor_side"},
+        "west": {"texture": "phycon:block/extractor_side"},
+        "east": {"texture": "phycon:block/extractor_side"}
+      }
+    },
+    {
+      "from": [2, 2, 2],
+      "to": [14, 4, 14],
+      "faces": {
+        "up": {"texture": "phycon:block/extractor_back"},
+        "north": {"texture": "phycon:block/extractor_side"},
+        "south": {"texture": "phycon:block/extractor_side"},
+        "west": {"texture": "phycon:block/extractor_side"},
+        "east": {"texture": "phycon:block/extractor_side"}
+      }
+    },
+    {
+      "from": [4, 4, 4],
+      "to": [12, 6, 12],
+      "faces": {
+        "up": {"texture": "phycon:block/extractor_back"},
+        "north": {"texture": "phycon:block/extractor_side"},
+        "south": {"texture": "phycon:block/extractor_side"},
+        "west": {"texture": "phycon:block/extractor_side"},
+        "east": {"texture": "phycon:block/extractor_side"}
+      }
+    },
+    {
+      "from": [6, 6, 6],
+      "to": [10, 16, 10],
+      "faces": {
+        "up": {"texture": "phycon:block/cable_side"},
+        "north": {"texture": "phycon:block/cable_side"},
+        "south": {"texture": "phycon:block/cable_side"},
+        "west": {"texture": "phycon:block/cable_side"},
+        "east": {"texture": "phycon:block/cable_side"}
+      }
+    }
+  ]
+}

src/main/resources/assets/phycon/models/item/console.json

@@ -0,0 +1,6 @@
+{
+  "parent": "minecraft:item/generated",
+  "textures": {
+    "layer0": "phycon:item/console"
+  }
+}

src/main/resources/assets/phycon/models/item/network_interface.json

@@ -0,0 +1,54 @@
+{
+  "parent": "block/block",
+  "display": {
+    "firstperson_righthand": {
+      "rotation": [0, 215, 0],
+      "translation": [0, 0, 0],
+      "scale": [0.4, 0.4, 0.4]
+    },
+    "thirdperson_righthand": {
+      "rotation": [75, 215, 0],
+      "translation": [0, -2.5, 0],
+      "scale": [0.375, 0.375, 0.375]
+    }
+  },
+  "elements": [
+    {
+      "_comment": "cable center",
+      "from": [6, 6, 6],
+      "to": [10, 10, 10],
+      "faces": {
+        "down": { "texture": "phycon:block/cable_center" },
+        "up": { "texture": "phycon:block/cable_center" },
+        "north": { "texture": "phycon:block/cable_center" },
+        "south": { "texture": "phycon:block/cable_center" },
+        "west": { "texture": "phycon:block/cable_center" },
+        "east": { "texture": "phycon:block/cable_center" }
+      }
+    },
+    {
+      "_comment": "interface side",
+      "from": [2, 2, 14],
+      "to": [14, 14, 16],
+      "faces": {
+        "down": { "texture": "phycon:block/interface_side" },
+        "up": { "texture": "phycon:block/interface_side" },
+        "north": { "texture": "phycon:block/interface_front" },
+        "south": { "texture": "phycon:block/interface_back" },
+        "west": { "texture": "phycon:block/interface_side" },
+        "east": { "texture": "phycon:block/interface_side" }
+      }
+    },
+    {
+      "_comment": "interface middle",
+      "from": [6, 6, 10],
+      "to": [10, 10, 14],
+      "faces": {
+        "down": { "texture": "phycon:block/cable_side" },
+        "up": { "texture": "phycon:block/cable_side" },
+        "west": { "texture": "phycon:block/cable_side" },
+        "east": { "texture": "phycon:block/cable_side" }
+      }
+    }
+  ]
+}