mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-12-22 15:35:00 -05:00
1054 lines
43 KiB
Python
1054 lines
43 KiB
Python
# Copyright 2022 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
from typing import Optional
|
|
from unittest import mock
|
|
|
|
from twisted.test.proto_helpers import MemoryReactor
|
|
|
|
from synapse.api.errors import AuthError, StoreError
|
|
from synapse.api.room_versions import RoomVersion
|
|
from synapse.event_auth import (
|
|
check_state_dependent_auth_rules,
|
|
check_state_independent_auth_rules,
|
|
)
|
|
from synapse.events import make_event_from_dict
|
|
from synapse.events.snapshot import EventContext
|
|
from synapse.federation.transport.client import StateRequestResponse
|
|
from synapse.logging.context import LoggingContext
|
|
from synapse.rest import admin
|
|
from synapse.rest.client import login, room
|
|
from synapse.server import HomeServer
|
|
from synapse.state.v2 import _mainline_sort, _reverse_topological_power_sort
|
|
from synapse.types import JsonDict
|
|
from synapse.util import Clock
|
|
|
|
from tests import unittest
|
|
from tests.test_utils import event_injection, make_awaitable
|
|
|
|
|
|
class FederationEventHandlerTests(unittest.FederatingHomeserverTestCase):
|
|
servlets = [
|
|
admin.register_servlets,
|
|
login.register_servlets,
|
|
room.register_servlets,
|
|
]
|
|
|
|
def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
|
|
# mock out the federation transport client
|
|
self.mock_federation_transport_client = mock.Mock(
|
|
spec=["get_room_state_ids", "get_room_state", "get_event", "backfill"]
|
|
)
|
|
return super().setup_test_homeserver(
|
|
federation_transport_client=self.mock_federation_transport_client
|
|
)
|
|
|
|
def test_process_pulled_event_with_missing_state(self) -> None:
|
|
"""Ensure that we correctly handle pulled events with lots of missing state
|
|
|
|
In this test, we pretend we are processing a "pulled" event (eg, via backfill
|
|
or get_missing_events). The pulled event has a prev_event we haven't previously
|
|
seen, so the server requests the state at that prev_event. There is a lot
|
|
of state we don't have, so we expect the server to make a /state request.
|
|
|
|
We check that the pulled event is correctly persisted, and that the state is
|
|
as we expect.
|
|
"""
|
|
return self._test_process_pulled_event_with_missing_state(False)
|
|
|
|
def test_process_pulled_event_with_missing_state_where_prev_is_outlier(
|
|
self,
|
|
) -> None:
|
|
"""Ensure that we correctly handle pulled events with lots of missing state
|
|
|
|
A slight modification to test_process_pulled_event_with_missing_state. Again
|
|
we have a "pulled" event which refers to a prev_event with lots of state,
|
|
but in this case we already have the prev_event (as an outlier, obviously -
|
|
if it were a regular event, we wouldn't need to request the state).
|
|
"""
|
|
return self._test_process_pulled_event_with_missing_state(True)
|
|
|
|
def _test_process_pulled_event_with_missing_state(
|
|
self, prev_exists_as_outlier: bool
|
|
) -> None:
|
|
OTHER_USER = f"@user:{self.OTHER_SERVER_NAME}"
|
|
main_store = self.hs.get_datastores().main
|
|
state_storage_controller = self.hs.get_storage_controllers().state
|
|
|
|
# create the room
|
|
user_id = self.register_user("kermit", "test")
|
|
tok = self.login("kermit", "test")
|
|
room_id = self.helper.create_room_as(room_creator=user_id, tok=tok)
|
|
room_version = self.get_success(main_store.get_room_version(room_id))
|
|
|
|
# allow the remote user to send state events
|
|
self.helper.send_state(
|
|
room_id,
|
|
"m.room.power_levels",
|
|
{"events_default": 0, "state_default": 0},
|
|
tok=tok,
|
|
)
|
|
|
|
# add the remote user to the room
|
|
member_event = self.get_success(
|
|
event_injection.inject_member_event(self.hs, room_id, OTHER_USER, "join")
|
|
)
|
|
|
|
initial_state_map = self.get_success(
|
|
main_store.get_partial_current_state_ids(room_id)
|
|
)
|
|
|
|
auth_event_ids = [
|
|
initial_state_map[("m.room.create", "")],
|
|
initial_state_map[("m.room.power_levels", "")],
|
|
member_event.event_id,
|
|
]
|
|
|
|
# mock up a load of state events which we are missing
|
|
state_events = [
|
|
make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "test_state_type",
|
|
"state_key": f"state_{i}",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [member_event.event_id],
|
|
"auth_events": auth_event_ids,
|
|
"origin_server_ts": 1,
|
|
"depth": 10,
|
|
"content": {"body": f"state_{i}"},
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
for i in range(1, 10)
|
|
]
|
|
|
|
# this is the state that we are going to claim is active at the prev_event.
|
|
state_at_prev_event = state_events + self.get_success(
|
|
main_store.get_events_as_list(initial_state_map.values())
|
|
)
|
|
|
|
# mock up a prev event.
|
|
# Depending on the test, we either persist this upfront (as an outlier),
|
|
# or let the server request it.
|
|
prev_event = make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "test_regular_type",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [],
|
|
"auth_events": auth_event_ids,
|
|
"origin_server_ts": 1,
|
|
"depth": 11,
|
|
"content": {"body": "missing_prev"},
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
if prev_exists_as_outlier:
|
|
prev_event.internal_metadata.outlier = True
|
|
persistence = self.hs.get_storage_controllers().persistence
|
|
self.get_success(
|
|
persistence.persist_event(
|
|
prev_event,
|
|
EventContext.for_outlier(self.hs.get_storage_controllers()),
|
|
)
|
|
)
|
|
else:
|
|
|
|
async def get_event(
|
|
destination: str, event_id: str, timeout: Optional[int] = None
|
|
) -> JsonDict:
|
|
self.assertEqual(destination, self.OTHER_SERVER_NAME)
|
|
self.assertEqual(event_id, prev_event.event_id)
|
|
return {"pdus": [prev_event.get_pdu_json()]}
|
|
|
|
self.mock_federation_transport_client.get_event.side_effect = get_event
|
|
|
|
# mock up a regular event to pass into _process_pulled_event
|
|
pulled_event = make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "test_regular_type",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [prev_event.event_id],
|
|
"auth_events": auth_event_ids,
|
|
"origin_server_ts": 1,
|
|
"depth": 12,
|
|
"content": {"body": "pulled"},
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
|
|
# we expect an outbound request to /state_ids, so stub that out
|
|
self.mock_federation_transport_client.get_room_state_ids.return_value = (
|
|
make_awaitable(
|
|
{
|
|
"pdu_ids": [e.event_id for e in state_at_prev_event],
|
|
"auth_chain_ids": [],
|
|
}
|
|
)
|
|
)
|
|
|
|
# we also expect an outbound request to /state
|
|
self.mock_federation_transport_client.get_room_state.return_value = (
|
|
make_awaitable(
|
|
StateRequestResponse(auth_events=[], state=state_at_prev_event)
|
|
)
|
|
)
|
|
|
|
# we have to bump the clock a bit, to keep the retry logic in
|
|
# FederationClient.get_pdu happy
|
|
self.reactor.advance(60000)
|
|
|
|
# Finally, the call under test: send the pulled event into _process_pulled_event
|
|
with LoggingContext("test"):
|
|
self.get_success(
|
|
self.hs.get_federation_event_handler()._process_pulled_event(
|
|
self.OTHER_SERVER_NAME, pulled_event, backfilled=False
|
|
)
|
|
)
|
|
|
|
# check that the event is correctly persisted
|
|
persisted = self.get_success(main_store.get_event(pulled_event.event_id))
|
|
self.assertIsNotNone(persisted, "pulled event was not persisted at all")
|
|
self.assertFalse(
|
|
persisted.internal_metadata.is_outlier(), "pulled event was an outlier"
|
|
)
|
|
|
|
# check that the state at that event is as expected
|
|
state = self.get_success(
|
|
state_storage_controller.get_state_ids_for_event(pulled_event.event_id)
|
|
)
|
|
expected_state = {
|
|
(e.type, e.state_key): e.event_id for e in state_at_prev_event
|
|
}
|
|
self.assertEqual(state, expected_state)
|
|
|
|
if prev_exists_as_outlier:
|
|
self.mock_federation_transport_client.get_event.assert_not_called()
|
|
|
|
def test_process_pulled_event_records_failed_backfill_attempts(
|
|
self,
|
|
) -> None:
|
|
"""
|
|
Test to make sure that failed backfill attempts for an event are
|
|
recorded in the `event_failed_pull_attempts` table.
|
|
|
|
In this test, we pretend we are processing a "pulled" event via
|
|
backfill. The pulled event has a fake `prev_event` which our server has
|
|
obviously never seen before so it attempts to request the state at that
|
|
`prev_event` which expectedly fails because it's a fake event. Because
|
|
the server can't fetch the state at the missing `prev_event`, the
|
|
"pulled" event fails the history check and is fails to process.
|
|
|
|
We check that we correctly record the number of failed pull attempts
|
|
of the pulled event and as a sanity check, that the "pulled" event isn't
|
|
persisted.
|
|
"""
|
|
OTHER_USER = f"@user:{self.OTHER_SERVER_NAME}"
|
|
main_store = self.hs.get_datastores().main
|
|
|
|
# Create the room
|
|
user_id = self.register_user("kermit", "test")
|
|
tok = self.login("kermit", "test")
|
|
room_id = self.helper.create_room_as(room_creator=user_id, tok=tok)
|
|
room_version = self.get_success(main_store.get_room_version(room_id))
|
|
|
|
# We expect an outbound request to /state_ids, so stub that out
|
|
self.mock_federation_transport_client.get_room_state_ids.return_value = make_awaitable(
|
|
{
|
|
# Mimic the other server not knowing about the state at all.
|
|
# We want to cause Synapse to throw an error (`Unable to get
|
|
# missing prev_event $fake_prev_event`) and fail to backfill
|
|
# the pulled event.
|
|
"pdu_ids": [],
|
|
"auth_chain_ids": [],
|
|
}
|
|
)
|
|
# We also expect an outbound request to /state
|
|
self.mock_federation_transport_client.get_room_state.return_value = make_awaitable(
|
|
StateRequestResponse(
|
|
# Mimic the other server not knowing about the state at all.
|
|
# We want to cause Synapse to throw an error (`Unable to get
|
|
# missing prev_event $fake_prev_event`) and fail to backfill
|
|
# the pulled event.
|
|
auth_events=[],
|
|
state=[],
|
|
)
|
|
)
|
|
|
|
pulled_event = make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "test_regular_type",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [
|
|
# The fake prev event will make the pulled event fail
|
|
# the history check (`Unable to get missing prev_event
|
|
# $fake_prev_event`)
|
|
"$fake_prev_event"
|
|
],
|
|
"auth_events": [],
|
|
"origin_server_ts": 1,
|
|
"depth": 12,
|
|
"content": {"body": "pulled"},
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
|
|
# The function under test: try to process the pulled event
|
|
with LoggingContext("test"):
|
|
self.get_success(
|
|
self.hs.get_federation_event_handler()._process_pulled_event(
|
|
self.OTHER_SERVER_NAME, pulled_event, backfilled=True
|
|
)
|
|
)
|
|
|
|
# Make sure our failed pull attempt was recorded
|
|
backfill_num_attempts = self.get_success(
|
|
main_store.db_pool.simple_select_one_onecol(
|
|
table="event_failed_pull_attempts",
|
|
keyvalues={"event_id": pulled_event.event_id},
|
|
retcol="num_attempts",
|
|
)
|
|
)
|
|
self.assertEqual(backfill_num_attempts, 1)
|
|
|
|
# The function under test: try to process the pulled event again
|
|
with LoggingContext("test"):
|
|
self.get_success(
|
|
self.hs.get_federation_event_handler()._process_pulled_event(
|
|
self.OTHER_SERVER_NAME, pulled_event, backfilled=True
|
|
)
|
|
)
|
|
|
|
# Make sure our second failed pull attempt was recorded (`num_attempts` was incremented)
|
|
backfill_num_attempts = self.get_success(
|
|
main_store.db_pool.simple_select_one_onecol(
|
|
table="event_failed_pull_attempts",
|
|
keyvalues={"event_id": pulled_event.event_id},
|
|
retcol="num_attempts",
|
|
)
|
|
)
|
|
self.assertEqual(backfill_num_attempts, 2)
|
|
|
|
# And as a sanity check, make sure the event was not persisted through all of this.
|
|
persisted = self.get_success(
|
|
main_store.get_event(pulled_event.event_id, allow_none=True)
|
|
)
|
|
self.assertIsNone(
|
|
persisted,
|
|
"pulled event that fails the history check should not be persisted at all",
|
|
)
|
|
|
|
def test_process_pulled_event_clears_backfill_attempts_after_being_successfully_persisted(
|
|
self,
|
|
) -> None:
|
|
"""
|
|
Test to make sure that failed pull attempts
|
|
(`event_failed_pull_attempts` table) for an event are cleared after the
|
|
event is successfully persisted.
|
|
|
|
In this test, we pretend we are processing a "pulled" event via
|
|
backfill. The pulled event succesfully processes and the backward
|
|
extremeties are updated along with clearing out any failed pull attempts
|
|
for those old extremities.
|
|
|
|
We check that we correctly cleared failed pull attempts of the
|
|
pulled event.
|
|
"""
|
|
OTHER_USER = f"@user:{self.OTHER_SERVER_NAME}"
|
|
main_store = self.hs.get_datastores().main
|
|
|
|
# Create the room
|
|
user_id = self.register_user("kermit", "test")
|
|
tok = self.login("kermit", "test")
|
|
room_id = self.helper.create_room_as(room_creator=user_id, tok=tok)
|
|
room_version = self.get_success(main_store.get_room_version(room_id))
|
|
|
|
# allow the remote user to send state events
|
|
self.helper.send_state(
|
|
room_id,
|
|
"m.room.power_levels",
|
|
{"events_default": 0, "state_default": 0},
|
|
tok=tok,
|
|
)
|
|
|
|
# add the remote user to the room
|
|
member_event = self.get_success(
|
|
event_injection.inject_member_event(self.hs, room_id, OTHER_USER, "join")
|
|
)
|
|
|
|
initial_state_map = self.get_success(
|
|
main_store.get_partial_current_state_ids(room_id)
|
|
)
|
|
|
|
auth_event_ids = [
|
|
initial_state_map[("m.room.create", "")],
|
|
initial_state_map[("m.room.power_levels", "")],
|
|
member_event.event_id,
|
|
]
|
|
|
|
pulled_event = make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "test_regular_type",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [member_event.event_id],
|
|
"auth_events": auth_event_ids,
|
|
"origin_server_ts": 1,
|
|
"depth": 12,
|
|
"content": {"body": "pulled"},
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
|
|
# Fake the "pulled" event failing to backfill once so we can test
|
|
# if it's cleared out later on.
|
|
self.get_success(
|
|
main_store.record_event_failed_pull_attempt(
|
|
pulled_event.room_id, pulled_event.event_id, "fake cause"
|
|
)
|
|
)
|
|
# Make sure we have a failed pull attempt recorded for the pulled event
|
|
backfill_num_attempts = self.get_success(
|
|
main_store.db_pool.simple_select_one_onecol(
|
|
table="event_failed_pull_attempts",
|
|
keyvalues={"event_id": pulled_event.event_id},
|
|
retcol="num_attempts",
|
|
)
|
|
)
|
|
self.assertEqual(backfill_num_attempts, 1)
|
|
|
|
# The function under test: try to process the pulled event
|
|
with LoggingContext("test"):
|
|
self.get_success(
|
|
self.hs.get_federation_event_handler()._process_pulled_event(
|
|
self.OTHER_SERVER_NAME, pulled_event, backfilled=True
|
|
)
|
|
)
|
|
|
|
# Make sure the failed pull attempts for the pulled event are cleared
|
|
backfill_num_attempts = self.get_success(
|
|
main_store.db_pool.simple_select_one_onecol(
|
|
table="event_failed_pull_attempts",
|
|
keyvalues={"event_id": pulled_event.event_id},
|
|
retcol="num_attempts",
|
|
allow_none=True,
|
|
)
|
|
)
|
|
self.assertIsNone(backfill_num_attempts)
|
|
|
|
# And as a sanity check, make sure the "pulled" event was persisted.
|
|
persisted = self.get_success(
|
|
main_store.get_event(pulled_event.event_id, allow_none=True)
|
|
)
|
|
self.assertIsNotNone(persisted, "pulled event was not persisted at all")
|
|
|
|
def test_backfill_signature_failure_does_not_fetch_same_prev_event_later(
|
|
self,
|
|
) -> None:
|
|
"""
|
|
Test to make sure we backoff and don't try to fetch a missing prev_event when we
|
|
already know it has a invalid signature from checking the signatures of all of
|
|
the events in the backfill response.
|
|
"""
|
|
OTHER_USER = f"@user:{self.OTHER_SERVER_NAME}"
|
|
main_store = self.hs.get_datastores().main
|
|
|
|
# Create the room
|
|
user_id = self.register_user("kermit", "test")
|
|
tok = self.login("kermit", "test")
|
|
room_id = self.helper.create_room_as(room_creator=user_id, tok=tok)
|
|
room_version = self.get_success(main_store.get_room_version(room_id))
|
|
|
|
# Allow the remote user to send state events
|
|
self.helper.send_state(
|
|
room_id,
|
|
"m.room.power_levels",
|
|
{"events_default": 0, "state_default": 0},
|
|
tok=tok,
|
|
)
|
|
|
|
# Add the remote user to the room
|
|
member_event = self.get_success(
|
|
event_injection.inject_member_event(self.hs, room_id, OTHER_USER, "join")
|
|
)
|
|
|
|
initial_state_map = self.get_success(
|
|
main_store.get_partial_current_state_ids(room_id)
|
|
)
|
|
|
|
auth_event_ids = [
|
|
initial_state_map[("m.room.create", "")],
|
|
initial_state_map[("m.room.power_levels", "")],
|
|
member_event.event_id,
|
|
]
|
|
|
|
# We purposely don't run `add_hashes_and_signatures_from_other_server`
|
|
# over this because we want the signature check to fail.
|
|
pulled_event_without_signatures = make_event_from_dict(
|
|
{
|
|
"type": "test_regular_type",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [member_event.event_id],
|
|
"auth_events": auth_event_ids,
|
|
"origin_server_ts": 1,
|
|
"depth": 12,
|
|
"content": {"body": "pulled_event_without_signatures"},
|
|
},
|
|
room_version,
|
|
)
|
|
|
|
# Create a regular event that should pass except for the
|
|
# `pulled_event_without_signatures` in the `prev_event`.
|
|
pulled_event = make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "test_regular_type",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [
|
|
member_event.event_id,
|
|
pulled_event_without_signatures.event_id,
|
|
],
|
|
"auth_events": auth_event_ids,
|
|
"origin_server_ts": 1,
|
|
"depth": 12,
|
|
"content": {"body": "pulled_event"},
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
|
|
# We expect an outbound request to /backfill, so stub that out
|
|
self.mock_federation_transport_client.backfill.return_value = make_awaitable(
|
|
{
|
|
"origin": self.OTHER_SERVER_NAME,
|
|
"origin_server_ts": 123,
|
|
"pdus": [
|
|
# This is one of the important aspects of this test: we include
|
|
# `pulled_event_without_signatures` so it fails the signature check
|
|
# when we filter down the backfill response down to events which
|
|
# have valid signatures in
|
|
# `_check_sigs_and_hash_for_pulled_events_and_fetch`
|
|
pulled_event_without_signatures.get_pdu_json(),
|
|
# Then later when we process this valid signature event, when we
|
|
# fetch the missing `prev_event`s, we want to make sure that we
|
|
# backoff and don't try and fetch `pulled_event_without_signatures`
|
|
# again since we know it just had an invalid signature.
|
|
pulled_event.get_pdu_json(),
|
|
],
|
|
}
|
|
)
|
|
|
|
# Keep track of the count and make sure we don't make any of these requests
|
|
event_endpoint_requested_count = 0
|
|
room_state_ids_endpoint_requested_count = 0
|
|
room_state_endpoint_requested_count = 0
|
|
|
|
async def get_event(
|
|
destination: str, event_id: str, timeout: Optional[int] = None
|
|
) -> None:
|
|
nonlocal event_endpoint_requested_count
|
|
event_endpoint_requested_count += 1
|
|
|
|
async def get_room_state_ids(
|
|
destination: str, room_id: str, event_id: str
|
|
) -> None:
|
|
nonlocal room_state_ids_endpoint_requested_count
|
|
room_state_ids_endpoint_requested_count += 1
|
|
|
|
async def get_room_state(
|
|
room_version: RoomVersion, destination: str, room_id: str, event_id: str
|
|
) -> None:
|
|
nonlocal room_state_endpoint_requested_count
|
|
room_state_endpoint_requested_count += 1
|
|
|
|
# We don't expect an outbound request to `/event`, `/state_ids`, or `/state` in
|
|
# the happy path but if the logic is sneaking around what we expect, stub that
|
|
# out so we can detect that failure
|
|
self.mock_federation_transport_client.get_event.side_effect = get_event
|
|
self.mock_federation_transport_client.get_room_state_ids.side_effect = (
|
|
get_room_state_ids
|
|
)
|
|
self.mock_federation_transport_client.get_room_state.side_effect = (
|
|
get_room_state
|
|
)
|
|
|
|
# The function under test: try to backfill and process the pulled event
|
|
with LoggingContext("test"):
|
|
self.get_success(
|
|
self.hs.get_federation_event_handler().backfill(
|
|
self.OTHER_SERVER_NAME,
|
|
room_id,
|
|
limit=1,
|
|
extremities=["$some_extremity"],
|
|
)
|
|
)
|
|
|
|
if event_endpoint_requested_count > 0:
|
|
self.fail(
|
|
"We don't expect an outbound request to /event in the happy path but if "
|
|
"the logic is sneaking around what we expect, make sure to fail the test. "
|
|
"We don't expect it because the signature failure should cause us to backoff "
|
|
"and not asking about pulled_event_without_signatures="
|
|
f"{pulled_event_without_signatures.event_id} again"
|
|
)
|
|
|
|
if room_state_ids_endpoint_requested_count > 0:
|
|
self.fail(
|
|
"We don't expect an outbound request to /state_ids in the happy path but if "
|
|
"the logic is sneaking around what we expect, make sure to fail the test. "
|
|
"We don't expect it because the signature failure should cause us to backoff "
|
|
"and not asking about pulled_event_without_signatures="
|
|
f"{pulled_event_without_signatures.event_id} again"
|
|
)
|
|
|
|
if room_state_endpoint_requested_count > 0:
|
|
self.fail(
|
|
"We don't expect an outbound request to /state in the happy path but if "
|
|
"the logic is sneaking around what we expect, make sure to fail the test. "
|
|
"We don't expect it because the signature failure should cause us to backoff "
|
|
"and not asking about pulled_event_without_signatures="
|
|
f"{pulled_event_without_signatures.event_id} again"
|
|
)
|
|
|
|
# Make sure we only recorded a single failure which corresponds to the signature
|
|
# failure initially in `_check_sigs_and_hash_for_pulled_events_and_fetch` before
|
|
# we process all of the pulled events.
|
|
backfill_num_attempts_for_event_without_signatures = self.get_success(
|
|
main_store.db_pool.simple_select_one_onecol(
|
|
table="event_failed_pull_attempts",
|
|
keyvalues={"event_id": pulled_event_without_signatures.event_id},
|
|
retcol="num_attempts",
|
|
)
|
|
)
|
|
self.assertEqual(backfill_num_attempts_for_event_without_signatures, 1)
|
|
|
|
# And make sure we didn't record a failure for the event that has the missing
|
|
# prev_event because we don't want to cause a cascade of failures. Not being
|
|
# able to fetch the `prev_events` just means we won't be able to de-outlier the
|
|
# pulled event. But we can still use an `outlier` in the state/auth chain for
|
|
# another event. So we shouldn't stop a downstream event from trying to pull it.
|
|
self.get_failure(
|
|
main_store.db_pool.simple_select_one_onecol(
|
|
table="event_failed_pull_attempts",
|
|
keyvalues={"event_id": pulled_event.event_id},
|
|
retcol="num_attempts",
|
|
),
|
|
# StoreError: 404: No row found
|
|
StoreError,
|
|
)
|
|
|
|
def test_process_pulled_event_with_rejected_missing_state(self) -> None:
|
|
"""Ensure that we correctly handle pulled events with missing state containing a
|
|
rejected state event
|
|
|
|
In this test, we pretend we are processing a "pulled" event (eg, via backfill
|
|
or get_missing_events). The pulled event has a prev_event we haven't previously
|
|
seen, so the server requests the state at that prev_event. We expect the server
|
|
to make a /state request.
|
|
|
|
We simulate a remote server whose /state includes a rejected kick event for a
|
|
local user. Notably, the kick event is rejected only because it cites a rejected
|
|
auth event and would otherwise be accepted based on the room state. During state
|
|
resolution, we re-run auth and can potentially introduce such rejected events
|
|
into the state if we are not careful.
|
|
|
|
We check that the pulled event is correctly persisted, and that the state
|
|
afterwards does not include the rejected kick.
|
|
"""
|
|
# The DAG we are testing looks like:
|
|
#
|
|
# ...
|
|
# |
|
|
# v
|
|
# remote admin user joins
|
|
# | |
|
|
# +-------+ +-------+
|
|
# | |
|
|
# | rejected power levels
|
|
# | from remote server
|
|
# | |
|
|
# | v
|
|
# | rejected kick of local user
|
|
# v from remote server
|
|
# new power levels |
|
|
# | v
|
|
# | missing event
|
|
# | from remote server
|
|
# | |
|
|
# +-------+ +-------+
|
|
# | |
|
|
# v v
|
|
# pulled event
|
|
# from remote server
|
|
#
|
|
# (arrows are in the opposite direction to prev_events.)
|
|
|
|
OTHER_USER = f"@user:{self.OTHER_SERVER_NAME}"
|
|
main_store = self.hs.get_datastores().main
|
|
|
|
# Create the room.
|
|
kermit_user_id = self.register_user("kermit", "test")
|
|
kermit_tok = self.login("kermit", "test")
|
|
room_id = self.helper.create_room_as(
|
|
room_creator=kermit_user_id, tok=kermit_tok
|
|
)
|
|
room_version = self.get_success(main_store.get_room_version(room_id))
|
|
|
|
# Add another local user to the room. This user is going to be kicked in a
|
|
# rejected event.
|
|
bert_user_id = self.register_user("bert", "test")
|
|
bert_tok = self.login("bert", "test")
|
|
self.helper.join(room_id, user=bert_user_id, tok=bert_tok)
|
|
|
|
# Allow the remote user to kick bert.
|
|
# The remote user is going to send a rejected power levels event later on and we
|
|
# need state resolution to order it before another power levels event kermit is
|
|
# going to send later on. Hence we give both users the same power level, so that
|
|
# ties are broken by `origin_server_ts`.
|
|
self.helper.send_state(
|
|
room_id,
|
|
"m.room.power_levels",
|
|
{"users": {kermit_user_id: 100, OTHER_USER: 100}},
|
|
tok=kermit_tok,
|
|
)
|
|
|
|
# Add the remote user to the room.
|
|
other_member_event = self.get_success(
|
|
event_injection.inject_member_event(self.hs, room_id, OTHER_USER, "join")
|
|
)
|
|
|
|
initial_state_map = self.get_success(
|
|
main_store.get_partial_current_state_ids(room_id)
|
|
)
|
|
create_event = self.get_success(
|
|
main_store.get_event(initial_state_map[("m.room.create", "")])
|
|
)
|
|
bert_member_event = self.get_success(
|
|
main_store.get_event(initial_state_map[("m.room.member", bert_user_id)])
|
|
)
|
|
power_levels_event = self.get_success(
|
|
main_store.get_event(initial_state_map[("m.room.power_levels", "")])
|
|
)
|
|
|
|
# We now need a rejected state event that will fail
|
|
# `check_state_independent_auth_rules` but pass
|
|
# `check_state_dependent_auth_rules`.
|
|
|
|
# First, we create a power levels event that we pretend the remote server has
|
|
# accepted, but the local homeserver will reject.
|
|
next_depth = 100
|
|
next_timestamp = other_member_event.origin_server_ts + 100
|
|
rejected_power_levels_event = make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "m.room.power_levels",
|
|
"state_key": "",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [other_member_event.event_id],
|
|
"auth_events": [
|
|
initial_state_map[("m.room.create", "")],
|
|
initial_state_map[("m.room.power_levels", "")],
|
|
# The event will be rejected because of the duplicated auth
|
|
# event.
|
|
other_member_event.event_id,
|
|
other_member_event.event_id,
|
|
],
|
|
"origin_server_ts": next_timestamp,
|
|
"depth": next_depth,
|
|
"content": power_levels_event.content,
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
next_depth += 1
|
|
next_timestamp += 100
|
|
|
|
with LoggingContext("send_rejected_power_levels_event"):
|
|
self.get_success(
|
|
self.hs.get_federation_event_handler()._process_pulled_event(
|
|
self.OTHER_SERVER_NAME,
|
|
rejected_power_levels_event,
|
|
backfilled=False,
|
|
)
|
|
)
|
|
self.assertEqual(
|
|
self.get_success(
|
|
main_store.get_rejection_reason(
|
|
rejected_power_levels_event.event_id
|
|
)
|
|
),
|
|
"auth_error",
|
|
)
|
|
|
|
# Then we create a kick event for a local user that cites the rejected power
|
|
# levels event in its auth events. The kick event will be rejected solely
|
|
# because of the rejected auth event and would otherwise be accepted.
|
|
rejected_kick_event = make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "m.room.member",
|
|
"state_key": bert_user_id,
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [rejected_power_levels_event.event_id],
|
|
"auth_events": [
|
|
initial_state_map[("m.room.create", "")],
|
|
rejected_power_levels_event.event_id,
|
|
initial_state_map[("m.room.member", bert_user_id)],
|
|
initial_state_map[("m.room.member", OTHER_USER)],
|
|
],
|
|
"origin_server_ts": next_timestamp,
|
|
"depth": next_depth,
|
|
"content": {"membership": "leave"},
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
next_depth += 1
|
|
next_timestamp += 100
|
|
|
|
# The kick event must fail the state-independent auth rules, but pass the
|
|
# state-dependent auth rules, so that it has a chance of making it through state
|
|
# resolution.
|
|
self.get_failure(
|
|
check_state_independent_auth_rules(main_store, rejected_kick_event),
|
|
AuthError,
|
|
)
|
|
check_state_dependent_auth_rules(
|
|
rejected_kick_event,
|
|
[create_event, power_levels_event, other_member_event, bert_member_event],
|
|
)
|
|
|
|
# The kick event must also win over the original member event during state
|
|
# resolution.
|
|
self.assertEqual(
|
|
self.get_success(
|
|
_mainline_sort(
|
|
self.clock,
|
|
room_id,
|
|
event_ids=[
|
|
bert_member_event.event_id,
|
|
rejected_kick_event.event_id,
|
|
],
|
|
resolved_power_event_id=power_levels_event.event_id,
|
|
event_map={
|
|
bert_member_event.event_id: bert_member_event,
|
|
rejected_kick_event.event_id: rejected_kick_event,
|
|
},
|
|
state_res_store=main_store,
|
|
)
|
|
),
|
|
[bert_member_event.event_id, rejected_kick_event.event_id],
|
|
"The rejected kick event will not be applied after bert's join event "
|
|
"during state resolution. The test setup is incorrect.",
|
|
)
|
|
|
|
with LoggingContext("send_rejected_kick_event"):
|
|
self.get_success(
|
|
self.hs.get_federation_event_handler()._process_pulled_event(
|
|
self.OTHER_SERVER_NAME, rejected_kick_event, backfilled=False
|
|
)
|
|
)
|
|
self.assertEqual(
|
|
self.get_success(
|
|
main_store.get_rejection_reason(rejected_kick_event.event_id)
|
|
),
|
|
"auth_error",
|
|
)
|
|
|
|
# We need another power levels event which will win over the rejected one during
|
|
# state resolution, otherwise we hit other issues where we end up with rejected
|
|
# a power levels event during state resolution.
|
|
self.reactor.advance(100) # ensure the `origin_server_ts` is larger
|
|
new_power_levels_event = self.get_success(
|
|
main_store.get_event(
|
|
self.helper.send_state(
|
|
room_id,
|
|
"m.room.power_levels",
|
|
{"users": {kermit_user_id: 100, OTHER_USER: 100, bert_user_id: 1}},
|
|
tok=kermit_tok,
|
|
)["event_id"]
|
|
)
|
|
)
|
|
self.assertEqual(
|
|
self.get_success(
|
|
_reverse_topological_power_sort(
|
|
self.clock,
|
|
room_id,
|
|
event_ids=[
|
|
new_power_levels_event.event_id,
|
|
rejected_power_levels_event.event_id,
|
|
],
|
|
event_map={},
|
|
state_res_store=main_store,
|
|
full_conflicted_set=set(),
|
|
)
|
|
),
|
|
[rejected_power_levels_event.event_id, new_power_levels_event.event_id],
|
|
"The power levels events will not have the desired ordering during state "
|
|
"resolution. The test setup is incorrect.",
|
|
)
|
|
|
|
# Create a missing event, so that the local homeserver has to do a `/state` or
|
|
# `/state_ids` request to pull state from the remote homeserver.
|
|
missing_event = make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "m.room.message",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [rejected_kick_event.event_id],
|
|
"auth_events": [
|
|
initial_state_map[("m.room.create", "")],
|
|
initial_state_map[("m.room.power_levels", "")],
|
|
initial_state_map[("m.room.member", OTHER_USER)],
|
|
],
|
|
"origin_server_ts": next_timestamp,
|
|
"depth": next_depth,
|
|
"content": {"msgtype": "m.text", "body": "foo"},
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
next_depth += 1
|
|
next_timestamp += 100
|
|
|
|
# The pulled event has two prev events, one of which is missing. We will make a
|
|
# `/state` or `/state_ids` request to the remote homeserver to ask it for the
|
|
# state before the missing prev event.
|
|
pulled_event = make_event_from_dict(
|
|
self.add_hashes_and_signatures_from_other_server(
|
|
{
|
|
"type": "m.room.message",
|
|
"room_id": room_id,
|
|
"sender": OTHER_USER,
|
|
"prev_events": [
|
|
new_power_levels_event.event_id,
|
|
missing_event.event_id,
|
|
],
|
|
"auth_events": [
|
|
initial_state_map[("m.room.create", "")],
|
|
new_power_levels_event.event_id,
|
|
initial_state_map[("m.room.member", OTHER_USER)],
|
|
],
|
|
"origin_server_ts": next_timestamp,
|
|
"depth": next_depth,
|
|
"content": {"msgtype": "m.text", "body": "bar"},
|
|
}
|
|
),
|
|
room_version,
|
|
)
|
|
next_depth += 1
|
|
next_timestamp += 100
|
|
|
|
# Prepare the response for the `/state` or `/state_ids` request.
|
|
# The remote server believes bert has been kicked, while the local server does
|
|
# not.
|
|
state_before_missing_event = self.get_success(
|
|
main_store.get_events_as_list(initial_state_map.values())
|
|
)
|
|
state_before_missing_event = [
|
|
event
|
|
for event in state_before_missing_event
|
|
if event.event_id != bert_member_event.event_id
|
|
]
|
|
state_before_missing_event.append(rejected_kick_event)
|
|
|
|
# We have to bump the clock a bit, to keep the retry logic in
|
|
# `FederationClient.get_pdu` happy
|
|
self.reactor.advance(60000)
|
|
with LoggingContext("send_pulled_event"):
|
|
|
|
async def get_event(
|
|
destination: str, event_id: str, timeout: Optional[int] = None
|
|
) -> JsonDict:
|
|
self.assertEqual(destination, self.OTHER_SERVER_NAME)
|
|
self.assertEqual(event_id, missing_event.event_id)
|
|
return {"pdus": [missing_event.get_pdu_json()]}
|
|
|
|
async def get_room_state_ids(
|
|
destination: str, room_id: str, event_id: str
|
|
) -> JsonDict:
|
|
self.assertEqual(destination, self.OTHER_SERVER_NAME)
|
|
self.assertEqual(event_id, missing_event.event_id)
|
|
return {
|
|
"pdu_ids": [event.event_id for event in state_before_missing_event],
|
|
"auth_chain_ids": [],
|
|
}
|
|
|
|
async def get_room_state(
|
|
room_version: RoomVersion, destination: str, room_id: str, event_id: str
|
|
) -> StateRequestResponse:
|
|
self.assertEqual(destination, self.OTHER_SERVER_NAME)
|
|
self.assertEqual(event_id, missing_event.event_id)
|
|
return StateRequestResponse(
|
|
state=state_before_missing_event,
|
|
auth_events=[],
|
|
)
|
|
|
|
self.mock_federation_transport_client.get_event.side_effect = get_event
|
|
self.mock_federation_transport_client.get_room_state_ids.side_effect = (
|
|
get_room_state_ids
|
|
)
|
|
self.mock_federation_transport_client.get_room_state.side_effect = (
|
|
get_room_state
|
|
)
|
|
|
|
self.get_success(
|
|
self.hs.get_federation_event_handler()._process_pulled_event(
|
|
self.OTHER_SERVER_NAME, pulled_event, backfilled=False
|
|
)
|
|
)
|
|
self.assertIsNone(
|
|
self.get_success(
|
|
main_store.get_rejection_reason(pulled_event.event_id)
|
|
),
|
|
"Pulled event was unexpectedly rejected, likely due to a problem with "
|
|
"the test setup.",
|
|
)
|
|
self.assertEqual(
|
|
{pulled_event.event_id},
|
|
self.get_success(
|
|
main_store.have_events_in_timeline([pulled_event.event_id])
|
|
),
|
|
"Pulled event was not persisted, likely due to a problem with the test "
|
|
"setup.",
|
|
)
|
|
|
|
# We must not accept rejected events into the room state, so we expect bert
|
|
# to not be kicked, even if the remote server believes so.
|
|
new_state_map = self.get_success(
|
|
main_store.get_partial_current_state_ids(room_id)
|
|
)
|
|
self.assertEqual(
|
|
new_state_map[("m.room.member", bert_user_id)],
|
|
bert_member_event.event_id,
|
|
"Rejected kick event unexpectedly became part of room state.",
|
|
)
|