Added Godot based server

network/client/Client.gd

@@ -0,0 +1,15 @@
+extends NetworkNode
+
+@export var ip := "127.0.0.1"
+@export var port := 4242
+
+var socket := PacketPeerUDP.new()
+
+func _init():
+	super._init()
+	socket.connect_to_host(ip, port)
+
+func _process(_delta):
+	while socket.get_available_packet_count() > 0:
+		var packet := socket.get_packet()
+		handle_packet(packet, socket)

network/client/Login.gd

@@ -0,0 +1,33 @@
+extends PacketHandler
+
+@export var playerScene: PackedScene
+
+var logged_in := false
+
+func _ready():
+	%Client.set_handler(Packet.LOGIN, self)
+	send_login()
+
+func send_login():
+	if logged_in:
+		return
+
+	var buffer := StreamPeerBuffer.new()
+	buffer.put_8(Packet.LOGIN)
+	buffer.put_data(JSON.stringify(["username", "password"]).to_utf8_buffer())
+	%Client.socket.put_packet(buffer.data_array)
+	print("[Client] Connecting...")
+
+func handle_packet(data: PackedByteArray, _peer: PacketPeer):
+	if data[0] != 0:
+		print("[Client] Login failed.")
+		return
+
+	print("[Client] Login succeeded.")
+	logged_in = true
+	Global.player = spawn_player()
+
+func spawn_player() -> Player:
+	var player = playerScene.instantiate()
+	%Players.add_child(player)
+	return player

network/client/Ping.gd

@@ -0,0 +1,32 @@
+extends PacketHandler
+
+signal changed(ping: float)
+
+const HISTORY_SIZE = 8
+
+var count := 0
+var history: Array[float] = []
+
+func _init():
+	history.resize(HISTORY_SIZE)
+
+func _ready():
+	%Client.set_handler(Packet.PING, self)
+
+func send_ping():
+	var buffer := StreamPeerBuffer.new()
+	buffer.put_8(Packet.PING)
+	buffer.put_8(count)
+	%Client.socket.put_packet(buffer.data_array)
+
+	history[count] = Time.get_unix_time_from_system()
+	count += 1
+
+	if count >= HISTORY_SIZE:
+		count = 0
+
+func handle_packet(data: PackedByteArray, _peer: PacketPeer):
+	var id := data[0]
+	var ping := Time.get_unix_time_from_system() - history[id]
+	changed.emit(ping)
+