Kodi Craft
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86 lines
2.7 KiB
Elixir
86 lines
2.7 KiB
Elixir
# Amethyst - An experimental Minecraft server written in Elixir.
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# Copyright (C) 2024 KodiCraft
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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defmodule Amethyst.Server.Status do
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@moduledoc """
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This module contains the logic for the Status stage of the server.
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"""
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require Logger
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use Amethyst.Server
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alias Amethyst.Minecraft.Read
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alias Amethyst.Minecraft.Write
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@impl true
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def init(state) do
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state
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end
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## DESERIALIZATION
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@impl true
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# Status Request https://wiki.vg/Protocol#Status_Request
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def deserialize(0x00, _) do
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{:status_request}
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end
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# Ping Request https://wiki.vg/Protocol#Ping_Request
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def deserialize(0x01, <<data::binary>>) do
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{[payload], ""} = Read.start(data) |> Read.long() |> Read.stop()
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{:ping_request, payload}
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end
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def deserialize(type, _) do
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raise RuntimeError, "Got unknown packet type #{type}!"
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end
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## SERIALIZATION
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@impl true
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# Status Response https://wiki.vg/Protocol#Status_Response
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def serialize({:status_response, data}) do
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Write.varint(0x00) <> Write.string(data)
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end
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def serialize({:ping_response, payload}) do
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Write.varint(0x01) <> Write.long(payload)
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end
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def serialize(packet) do
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raise ArgumentError, "Tried serializing unknown packet #{inspect(packet)}"
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end
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## HANDLING
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@impl true
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# Status Request https://wiki.vg/Protocol#Status_Request
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def handle({:status_request}, client, state) do
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# We want to make this more dynamic in the future, but this works for now
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packet = {:status_response, ~s({
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"version": {"name": "1.21", "protocol": 767},
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"players": {"max": -1, "online": 69, "sample": [{"name": "§dAmethyst§r", "id": "4566e69f-c907-48ee-8d71-d7ba5aa00d20"}]},
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"description": {"text":"Amethyst is an experimental server written in Elixir"},
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"enforcesSecureChat": false,
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"previewsChat": false,
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"preventsChatReports": true
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})}
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transmit(packet, client)
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{:ok, state}
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end
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def handle({:ping_request, payload}, client, state) do
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packet = {:ping_response, payload}
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transmit(packet, client)
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{:ok, state}
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end
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def handle(tuple, _, state) do
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Logger.error("Unhandled but known packet #{elem(tuple, 0)}")
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{:unhandled, state}
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end
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end
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