mirror of
https://github.com/ammaraskar/pyCraft.git
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969419da3f
After 1.16.3, Mojang started publishing snapshot, pre-release and release
candidate versions of Minecraft with protocol version numbers of the form
`(1 << 30) | n' where 'n' is a small non-negative integer increasing with each
such version; the release versions continued to use the old format. For
example, these are the last 8 published Minecraft versions as of this commit:
release 1.16.3 uses protocol version 753
pre-release 1.16.4-pre1 uses protocol version 1073741825 == (1 << 30) | 1
pre-release 1.16.4-pre2 uses protocol version 1073741826 == (1 << 30) | 2
release candidate 1.16.4-rc1 uses protocol version 1073741827 == (1 << 30) | 3
release 1.16.4 uses protocol version 754
snapshot 20w45a uses protocol version 1073741829 == (1 << 30) | 5
snapshot 20w46a uses protocol version 1073741830 == (1 << 30) | 6
snapshot 20w48a uses protocol version 1073741831 == (1 << 30) | 7
This means that protocol versions no longer increase monotonically with respect
to publication history, a property that was assumed to hold in much of
pyCraft's code relating to support of multiple protocol versions. This commit
rectifies the issue by replacing any comparison of protocol versions by their
numerical value with a comparison based on their publication time.
Newly defined is the dictionary `minecraft.PROTOCOL_VERSION_INDICES', which
maps each known protocol version to its index in the protocol chronology. As
such, the bound method `minecraft.PROTOCOL_VERSION_INDICES.get` can be used as
a key function for the built-in `sorted`, `min` and `max` functions to collate
protocol versions chronologically.
Two utility functions are provided for direct comparison of protocol versions:
`minecraft.utility.protocol_earlier` and
`minecraft.utility.protocol_earlier_eq`.
Additionally, four methods are added to the `ConnectionContext` type to ease
the most common cases where the protocol of a given context must be compared to
a given version number:
`minecraft.connection.ConnectionContext.protocol_earlier`,
`minecraft.connection.ConnectionContext.protocol_earlier_eq`,
`minecraft.connection.ConnectionContext.protocol_later` and
`minecraft.connection.ConnectionContext.protocol_later_eq`.
383 lines
15 KiB
Python
383 lines
15 KiB
Python
# -*- coding: utf-8 -*-
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import unittest
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import string
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import logging
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import struct
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from zlib import decompress
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from random import choice
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from minecraft import SUPPORTED_PROTOCOL_VERSIONS, RELEASE_PROTOCOL_VERSIONS
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from minecraft.networking.connection import ConnectionContext
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from minecraft.networking.types import (
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VarInt, Enum, Vector, PositionAndLook, OriginPoint,
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)
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from minecraft.networking.packets import (
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Packet, PacketBuffer, PacketListener, KeepAlivePacket, serverbound,
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clientbound
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)
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TEST_VERSIONS = list(RELEASE_PROTOCOL_VERSIONS)
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if SUPPORTED_PROTOCOL_VERSIONS[-1] not in TEST_VERSIONS:
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TEST_VERSIONS.append(SUPPORTED_PROTOCOL_VERSIONS[-1])
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class PacketBufferTest(unittest.TestCase):
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def test_basic_read_write(self):
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message = b"hello"
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packet_buffer = PacketBuffer()
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packet_buffer.send(message)
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packet_buffer.reset_cursor()
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self.assertEqual(packet_buffer.read(), message)
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packet_buffer.reset_cursor()
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self.assertEqual(packet_buffer.recv(), message)
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packet_buffer.reset()
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self.assertNotEqual(packet_buffer.read(), message)
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def test_get_writable(self):
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message = b"hello"
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packet_buffer = PacketBuffer()
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packet_buffer.send(message)
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self.assertEqual(packet_buffer.get_writable(), message)
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class PacketSerializationTest(unittest.TestCase):
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def test_packet(self):
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for protocol_version in TEST_VERSIONS:
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logging.debug('protocol_version = %r' % protocol_version)
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context = ConnectionContext(protocol_version=protocol_version)
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packet = serverbound.play.ChatPacket(context)
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packet.message = u"κόσμε"
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packet_buffer = PacketBuffer()
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packet.write(packet_buffer)
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packet_buffer.reset_cursor()
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# Read the length and packet id
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VarInt.read(packet_buffer)
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packet_id = VarInt.read(packet_buffer)
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self.assertEqual(packet_id, packet.id)
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deserialized = serverbound.play.ChatPacket(context)
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deserialized.read(packet_buffer)
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self.assertEqual(packet.message, deserialized.message)
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def test_compressed_packet(self):
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for protocol_version in TEST_VERSIONS:
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logging.debug('protocol_version = %r' % protocol_version)
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context = ConnectionContext(protocol_version=protocol_version)
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msg = ''.join(choice(string.ascii_lowercase) for i in range(500))
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packet = serverbound.play.ChatPacket(context)
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packet.message = msg
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self.write_read_packet(packet, 20)
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self.write_read_packet(packet, -1)
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def write_read_packet(self, packet, compression_threshold):
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for protocol_version in TEST_VERSIONS:
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logging.debug('protocol_version = %r' % protocol_version)
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context = ConnectionContext(protocol_version=protocol_version)
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packet_buffer = PacketBuffer()
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packet.write(packet_buffer, compression_threshold)
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packet_buffer.reset_cursor()
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VarInt.read(packet_buffer)
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compressed_size = VarInt.read(packet_buffer)
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if compressed_size > 0:
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decompressed = decompress(packet_buffer.read(compressed_size))
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packet_buffer.reset()
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packet_buffer.send(decompressed)
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packet_buffer.reset_cursor()
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packet_id = VarInt.read(packet_buffer)
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self.assertEqual(packet_id, packet.id)
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deserialized = serverbound.play.ChatPacket(context)
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deserialized.read(packet_buffer)
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self.assertEqual(packet.message, deserialized.message)
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class PacketListenerTest(unittest.TestCase):
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def test_listener(self):
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message = "hello world"
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def test_packet(chat_packet):
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self.assertEqual(chat_packet.message, message)
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for protocol_version in TEST_VERSIONS:
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logging.debug('protocol_version = %r' % protocol_version)
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context = ConnectionContext(protocol_version=protocol_version)
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listener = PacketListener(test_packet, serverbound.play.ChatPacket)
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packet = serverbound.play.ChatPacket(context).set_values(
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message=message)
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uncalled_packet = KeepAlivePacket().set_values(keep_alive_id=0)
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listener.call_packet(packet)
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listener.call_packet(uncalled_packet)
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class PacketEnumTest(unittest.TestCase):
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def test_packet_str(self):
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class ExamplePacket(Packet):
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id = 0x00
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packet_name = 'example'
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definition = [
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{'alpha': VarInt},
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{'beta': VarInt},
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{'gamma': VarInt}]
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class Alpha(Enum):
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ZERO = 0
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class Beta(Enum):
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ONE = 1
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self.assertEqual(
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str(ExamplePacket(ConnectionContext(), alpha=0, beta=0, gamma=0)),
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'0x00 ExamplePacket(alpha=ZERO, beta=0, gamma=0)'
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)
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class TestReadWritePackets(unittest.TestCase):
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maxDiff = None
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def test_explosion_packet(self):
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Record = clientbound.play.ExplosionPacket.Record
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packet = clientbound.play.ExplosionPacket(
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position=Vector(787, -37, 0), radius=15,
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records=[Record(-14, -116, -5), Record(-77, 34, -36),
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Record(-35, -127, 95), Record(11, 113, -8)],
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player_motion=Vector(4, 5, 0))
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self.assertEqual(
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str(packet),
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'ExplosionPacket(x=787, y=-37, z=0, radius=15, records=['
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'Record(-14, -116, -5), Record(-77, 34, -36), '
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'Record(-35, -127, 95), Record(11, 113, -8)], '
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'player_motion_x=4, player_motion_y=5, player_motion_z=0)'
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)
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self._test_read_write_packet(packet)
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def test_combat_event_packet(self):
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packet = clientbound.play.CombatEventPacket(
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event=clientbound.play.CombatEventPacket.EnterCombatEvent())
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self.assertEqual(
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str(packet),
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'CombatEventPacket(event=EnterCombatEvent())'
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)
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self._test_read_write_packet(packet)
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packet = clientbound.play.CombatEventPacket(
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event=clientbound.play.CombatEventPacket.EndCombatEvent(
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duration=415, entity_id=91063502))
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self.assertEqual(str(packet),
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'CombatEventPacket(event=EndCombatEvent('
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'duration=415, entity_id=91063502))')
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self._test_read_write_packet(packet)
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packet = clientbound.play.CombatEventPacket(
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event=clientbound.play.CombatEventPacket.EntityDeadEvent(
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player_id=178, entity_id=36, message='RIP'))
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self.assertEqual(
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str(packet),
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"CombatEventPacket(event=EntityDeadEvent("
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"player_id=178, entity_id=36, message='RIP'))"
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)
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self._test_read_write_packet(packet)
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def test_multi_block_change_packet(self):
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Record = clientbound.play.MultiBlockChangePacket.Record
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for protocol_version in TEST_VERSIONS:
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context = ConnectionContext()
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context.protocol_version = protocol_version
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packet = clientbound.play.MultiBlockChangePacket(context)
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if context.protocol_later_eq(741):
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packet.chunk_section_pos = Vector(167, 17, 33)
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packet.invert_trust_edges = False
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else:
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packet.chunk_x, packet.chunk_z = 167, 17
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self.assertEqual(packet.chunk_pos, (167, 17))
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packet.records = [
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Record(x=1, y=2, z=3, blockId=56, blockMeta=13),
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Record(position=Vector(1, 2, 3), block_state_id=909),
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Record(position=(1, 2, 3), blockStateId=909),
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]
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for i in range(3):
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self.assertEqual(packet.records[i].blockId, 56)
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self.assertEqual(packet.records[i].blockMeta, 13)
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self.assertEqual(packet.records[i].blockStateId, 909)
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self.assertEqual(packet.records[i].position, Vector(1, 2, 3))
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self._test_read_write_packet(packet, context)
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def test_spawn_object_packet(self):
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for protocol_version in TEST_VERSIONS:
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logging.debug('protocol_version = %r' % protocol_version)
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context = ConnectionContext(protocol_version=protocol_version)
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EntityType = clientbound.play.SpawnObjectPacket.field_enum(
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'type_id', context)
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pos_look = PositionAndLook(
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position=(Vector(68.0, 38.0, 76.0)
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if context.protocol_later_eq(100) else
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Vector(68, 38, 76)),
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yaw=263.494, pitch=180)
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velocity = Vector(21, 55, 41)
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entity_id, type_name, type_id = 49846, 'EGG', EntityType.EGG
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packet = clientbound.play.SpawnObjectPacket(
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context=context,
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x=pos_look.x, y=pos_look.y, z=pos_look.z,
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yaw=pos_look.yaw, pitch=pos_look.pitch,
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velocity_x=velocity.x, velocity_y=velocity.y,
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velocity_z=velocity.z,
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entity_id=entity_id, type_id=type_id, data=1)
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if context.protocol_later_eq(49):
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object_uuid = 'd9568851-85bc-4a10-8d6a-261d130626fa'
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packet.object_uuid = object_uuid
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self.assertEqual(packet.objectUUID, object_uuid)
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self.assertEqual(packet.position_and_look, pos_look)
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self.assertEqual(packet.position, pos_look.position)
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self.assertEqual(packet.velocity, velocity)
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self.assertEqual(packet.type, type_name)
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self.assertEqual(
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str(packet),
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"0x%02X SpawnObjectPacket(entity_id=49846, "
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"object_uuid='d9568851-85bc-4a10-8d6a-261d130626fa', "
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"type_id=EGG, x=68.0, y=38.0, z=76.0, pitch=180, yaw=263.494, "
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"data=1, velocity_x=21, velocity_y=55, velocity_z=41)"
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% packet.id if context.protocol_later_eq(100) else
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"0x%02X SpawnObjectPacket(entity_id=49846, "
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"object_uuid='d9568851-85bc-4a10-8d6a-261d130626fa', "
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"type_id=EGG, x=68, y=38, z=76, pitch=180, yaw=263.494, "
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"data=1, velocity_x=21, velocity_y=55, velocity_z=41)"
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% packet.id if context.protocol_later_eq(49) else
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"0x%02X SpawnObjectPacket(entity_id=49846, type_id=EGG, "
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"x=68, y=38, z=76, pitch=180, yaw=263.494, data=1, "
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"velocity_x=21, velocity_y=55, velocity_z=41)" % packet.id
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)
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packet2 = clientbound.play.SpawnObjectPacket(
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context=context, position_and_look=pos_look,
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velocity=velocity, type=type_name,
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entity_id=entity_id, data=1)
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if context.protocol_later_eq(49):
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packet2.object_uuid = object_uuid
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self.assertEqual(packet.__dict__, packet2.__dict__)
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packet2.position = pos_look.position
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self.assertEqual(packet.position, packet2.position)
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packet2.data = 0
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if context.protocol_earlier(49):
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del packet2.velocity
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self._test_read_write_packet(packet, context,
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yaw=360/256, pitch=360/256)
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self._test_read_write_packet(packet2, context,
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yaw=360/256, pitch=360/256)
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def test_sound_effect_packet(self):
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for protocol_version in TEST_VERSIONS:
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context = ConnectionContext(protocol_version=protocol_version)
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packet = clientbound.play.SoundEffectPacket(
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sound_id=545, effect_position=Vector(0.125, 300.0, 50.5),
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volume=0.75)
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if context.protocol_later_eq(201):
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packet.pitch = struct.unpack('f', struct.pack('f', 1.5))[0]
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else:
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packet.pitch = int(1.5 / 63.5) * 63.5
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if context.protocol_later_eq(95):
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packet.sound_category = \
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clientbound.play.SoundEffectPacket.SoundCategory.NEUTRAL
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self._test_read_write_packet(packet, context)
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def test_face_player_packet(self):
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for protocol_version in TEST_VERSIONS:
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context = ConnectionContext(protocol_version=protocol_version)
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packet = clientbound.play.FacePlayerPacket(context)
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packet.target = 1.0, -2.0, 3.5
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packet.entity_id = None
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if context.protocol_later_eq(353):
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packet.origin = OriginPoint.EYES
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self.assertEqual(
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str(packet),
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"0x%02X FacePlayerPacket(origin=EYES, x=1.0, y=-2.0, z=3.5, "
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"entity_id=None)" % packet.id
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if context.protocol_later_eq(353) else
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"0x%02X FacePlayerPacket(entity_id=None, x=1.0, y=-2.0, z=3.5)"
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% packet.id
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)
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self._test_read_write_packet(packet, context)
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packet.entity_id = 123
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if context.protocol_later_eq(353):
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packet.entity_origin = OriginPoint.FEET
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else:
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del packet.target
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self.assertEqual(
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str(packet),
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"0x%02X FacePlayerPacket(origin=EYES, x=1.0, y=-2.0, z=3.5, "
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"entity_id=123, entity_origin=FEET)" % packet.id
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if context.protocol_later_eq(353) else
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"0x%02X FacePlayerPacket(entity_id=123)" % packet.id
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)
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self._test_read_write_packet(packet, context)
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def _test_read_write_packet(self, packet_in, context=None, **kwargs):
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"""
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If kwargs are specified, the key will be tested against the
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respective delta value. Useful for testing FixedPointNumbers
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where there is precision lost in the resulting value.
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"""
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if context is None:
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for protocol_version in TEST_VERSIONS:
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logging.debug('protocol_version = %r' % protocol_version)
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context = ConnectionContext(protocol_version=protocol_version)
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self._test_read_write_packet(packet_in, context)
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else:
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packet_in.context = context
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packet_buffer = PacketBuffer()
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packet_in.write(packet_buffer)
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packet_buffer.reset_cursor()
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VarInt.read(packet_buffer)
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packet_id = VarInt.read(packet_buffer)
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self.assertEqual(packet_id, packet_in.id)
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packet_out = type(packet_in)(context=context)
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packet_out.read(packet_buffer)
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self.assertIs(type(packet_in), type(packet_out))
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for packet_attr, precision in kwargs.items():
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packet_attribute_in = packet_in.__dict__.pop(packet_attr)
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packet_attribute_out = packet_out.__dict__.pop(packet_attr)
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self.assertAlmostEqual(packet_attribute_in,
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packet_attribute_out,
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delta=precision)
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self.assertEqual(packet_in.__dict__, packet_out.__dict__)
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