Cannot get PacketPeerUDP working for godot v 4.4.1

[frozen_coder]

Godot Version

Godot for windows 4.4.1 64 bit stable

Question

I cannot figure out how to get the godot class PacketPeerUDP to send or receive packets.
Link to the class: PacketPeerUDP — Godot Engine (stable) documentation in English
Here is my attempt to send a packet with netcat listening in udp mode on port 7000

extends Node
var udpSocket
func _ready() -> void:
	print("HELLO")
	udpSocket = PacketPeerUDP.new()
	udpSocket.connect_to_host("127.0.0.1", 7000);
	udpSocket.put_packet(PackedByteArray([42, 42, 42]))

and here are the results

I get similar results when listening for a packet, as the packet is never received

Keywords

UDP PacketPeerUDP

[soapspangledgames]

Check the error codes for the connect_to_host() and put_packet() calls. They may tell you something useful.

[frozen_coder]

Thanks for your reply. The returned error codes are 0, which means ok. The code also does not seem to work on version 4.3

[mrcdk]

This works fine for me:

extends Node


var server:PacketPeerUDP
var client:PacketPeerUDP


func _ready() -> void:
	server = PacketPeerUDP.new()
	server.bind(53423)

	client = PacketPeerUDP.new()
	client.set_dest_address("localhost", 53423)
	client.put_packet("Hello world".to_utf8_buffer())
	await get_tree().create_timer(1).timeout
	client.put_packet("Another packet".to_utf8_buffer())


func _process(delta: float) -> void:
	if server.get_available_packet_count() > 0:
		var packet = server.get_packet()
		print(packet.get_string_from_utf8())

So I think your the problem is in the server side.

[frozen_coder]

@mrcdk

var server:PacketPeerUDP
var client:PacketPeerUDP


func _ready() -> void:
	server = PacketPeerUDP.new()
	server.bind(53423)

	client = PacketPeerUDP.new()
	client.set_dest_address("localhost", 53423)
	client.put_packet("Hello world".to_utf8_buffer())
	await get_tree().create_timer(1).timeout
	client.put_packet("Another packet".to_utf8_buffer())


func _process(delta: float) -> void:
	if server.get_available_packet_count() > 0:
		var packet = server.get_packet()
		print(packet.get_string_from_utf8())

This code does work. However, I ran some tests with this UDP server udp-echo-server/server.py at master · mqp/udp-echo-server · GitHub, and it seems to work when i use netcat in udp mode, but when i run my godot code, it does not connect.

[frozen_coder]

For some reason this code does not work on my windows computer, but the sockets work fine on the Debian machine I am using right now. I suspect that Godot might have been put on my firewall or something, I really have no idea

[frozen_coder]

I think the error is occurring because i ran the server on a Linux terminal, and the Godot process was running on my windows machine. When the local server is on a windows terminal, everything works.