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synapse/tests/federation/test_federation_server.py
Richard van der Hoff c897ac63e9
Ensure that incoming to-device messages are not dropped (#17127) 
... when workers are unreachable, etc.

Fixes https://github.com/element-hq/synapse/issues/17117.

The general principle is just to make sure that we propagate any
exceptions to the JsonResource, so that we return an error code to the
sending server. That means that the sending server no longer considers
the message safely sent, so it will retry later.

In the issue, Erik mentions that an alternative solution would be to
persist the to-device messages into a table so that they can be retried.
This might be an improvement for performance, but even if we did that,
we still need this mechanism, since we might be unable to reach the
database. So, if we want to do that, it can be a later follow-up.

---------

Co-authored-by: Erik Johnston <erik@matrix.org>
2024-04-29 14:11:00 +01:00

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#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright 2019 Matrix.org Federation C.I.C
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
import logging
from http import HTTPStatus
from parameterized import parameterized
from twisted.test.proto_helpers import MemoryReactor
from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
from synapse.config.server import DEFAULT_ROOM_VERSION
from synapse.events import EventBase, make_event_from_dict
from synapse.rest import admin
from synapse.rest.client import login, room
from synapse.server import HomeServer
from synapse.storage.controllers.state import server_acl_evaluator_from_event
from synapse.types import JsonDict
from synapse.util import Clock
from tests import unittest
from tests.unittest import override_config
class FederationServerTests(unittest.FederatingHomeserverTestCase):
servlets = [
admin.register_servlets,
room.register_servlets,
login.register_servlets,
]
@parameterized.expand([(b"",), (b"foo",), (b'{"limit": Infinity}',)])
def test_bad_request(self, query_content: bytes) -> None:
"""
Querying with bad data returns a reasonable error code.
"""
u1 = self.register_user("u1", "pass")
u1_token = self.login("u1", "pass")
room_1 = self.helper.create_room_as(u1, tok=u1_token)
self.inject_room_member(room_1, "@user:other.example.com", "join")
"/get_missing_events/(?P<room_id>[^/]*)/?"
channel = self.make_request(
"POST",
"/_matrix/federation/v1/get_missing_events/%s" % (room_1,),
query_content,
)
self.assertEqual(HTTPStatus.BAD_REQUEST, channel.code, channel.result)
self.assertEqual(channel.json_body["errcode"], "M_NOT_JSON")
def test_failed_edu_causes_500(self) -> None:
"""If the EDU handler fails, /send should return a 500."""
async def failing_handler(_origin: str, _content: JsonDict) -> None:
raise Exception("bleh")
self.hs.get_federation_registry().register_edu_handler(
"FAIL_EDU_TYPE", failing_handler
)
channel = self.make_signed_federation_request(
"PUT",
"/_matrix/federation/v1/send/txn",
{"edus": [{"edu_type": "FAIL_EDU_TYPE", "content": {}}]},
)
self.assertEqual(500, channel.code, channel.result)
class ServerACLsTestCase(unittest.TestCase):
def test_blocked_server(self) -> None:
e = _create_acl_event({"allow": ["*"], "deny": ["evil.com"]})
logging.info("ACL event: %s", e.content)
server_acl_evalutor = server_acl_evaluator_from_event(e)
self.assertFalse(server_acl_evalutor.server_matches_acl_event("evil.com"))
self.assertFalse(server_acl_evalutor.server_matches_acl_event("EVIL.COM"))
self.assertTrue(server_acl_evalutor.server_matches_acl_event("evil.com.au"))
self.assertTrue(
server_acl_evalutor.server_matches_acl_event("honestly.not.evil.com")
)
def test_block_ip_literals(self) -> None:
e = _create_acl_event({"allow_ip_literals": False, "allow": ["*"]})
logging.info("ACL event: %s", e.content)
server_acl_evalutor = server_acl_evaluator_from_event(e)
self.assertFalse(server_acl_evalutor.server_matches_acl_event("1.2.3.4"))
self.assertTrue(server_acl_evalutor.server_matches_acl_event("1a.2.3.4"))
self.assertFalse(server_acl_evalutor.server_matches_acl_event("[1:2::]"))
self.assertTrue(server_acl_evalutor.server_matches_acl_event("1:2:3:4"))
def test_wildcard_matching(self) -> None:
e = _create_acl_event({"allow": ["good*.com"]})
server_acl_evalutor = server_acl_evaluator_from_event(e)
self.assertTrue(
server_acl_evalutor.server_matches_acl_event("good.com"),
"* matches 0 characters",
)
self.assertTrue(
server_acl_evalutor.server_matches_acl_event("GOOD.COM"),
"pattern is case-insensitive",
)
self.assertTrue(
server_acl_evalutor.server_matches_acl_event("good.aa.com"),
"* matches several characters, including '.'",
)
self.assertFalse(
server_acl_evalutor.server_matches_acl_event("ishgood.com"),
"pattern does not allow prefixes",
)
class StateQueryTests(unittest.FederatingHomeserverTestCase):
servlets = [
admin.register_servlets,
room.register_servlets,
login.register_servlets,
]
def test_needs_to_be_in_room(self) -> None:
"""/v1/state/<room_id> requires the server to be in the room"""
u1 = self.register_user("u1", "pass")
u1_token = self.login("u1", "pass")
room_1 = self.helper.create_room_as(u1, tok=u1_token)
channel = self.make_signed_federation_request(
"GET", "/_matrix/federation/v1/state/%s?event_id=xyz" % (room_1,)
)
self.assertEqual(HTTPStatus.FORBIDDEN, channel.code, channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
class SendJoinFederationTests(unittest.FederatingHomeserverTestCase):
servlets = [
admin.register_servlets,
room.register_servlets,
login.register_servlets,
]
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
super().prepare(reactor, clock, hs)
self._storage_controllers = hs.get_storage_controllers()
# create the room
creator_user_id = self.register_user("kermit", "test")
tok = self.login("kermit", "test")
self._room_id = self.helper.create_room_as(
room_creator=creator_user_id, tok=tok
)
# a second member on the orgin HS
second_member_user_id = self.register_user("fozzie", "bear")
tok2 = self.login("fozzie", "bear")
self.helper.join(self._room_id, second_member_user_id, tok=tok2)
def _make_join(self, user_id: str) -> JsonDict:
channel = self.make_signed_federation_request(
"GET",
f"/_matrix/federation/v1/make_join/{self._room_id}/{user_id}"
f"?ver={DEFAULT_ROOM_VERSION}",
)
self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body)
return channel.json_body
def test_send_join(self) -> None:
"""happy-path test of send_join"""
joining_user = "@misspiggy:" + self.OTHER_SERVER_NAME
join_result = self._make_join(joining_user)
join_event_dict = join_result["event"]
self.add_hashes_and_signatures_from_other_server(
join_event_dict,
KNOWN_ROOM_VERSIONS[DEFAULT_ROOM_VERSION],
)
channel = self.make_signed_federation_request(
"PUT",
f"/_matrix/federation/v2/send_join/{self._room_id}/x",
content=join_event_dict,
)
self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body)
# we should get complete room state back
returned_state = [
(ev["type"], ev["state_key"]) for ev in channel.json_body["state"]
]
self.assertCountEqual(
returned_state,
[
("m.room.create", ""),
("m.room.power_levels", ""),
("m.room.join_rules", ""),
("m.room.history_visibility", ""),
("m.room.member", "@kermit:test"),
("m.room.member", "@fozzie:test"),
# nb: *not* the joining user
],
)
# also check the auth chain
returned_auth_chain_events = [
(ev["type"], ev["state_key"]) for ev in channel.json_body["auth_chain"]
]
self.assertCountEqual(
returned_auth_chain_events,
[
("m.room.create", ""),
("m.room.member", "@kermit:test"),
("m.room.power_levels", ""),
("m.room.join_rules", ""),
],
)
# the room should show that the new user is a member
r = self.get_success(
self._storage_controllers.state.get_current_state(self._room_id)
)
self.assertEqual(r[("m.room.member", joining_user)].membership, "join")
def test_send_join_partial_state(self) -> None:
"""/send_join should return partial state, if requested"""
joining_user = "@misspiggy:" + self.OTHER_SERVER_NAME
join_result = self._make_join(joining_user)
join_event_dict = join_result["event"]
self.add_hashes_and_signatures_from_other_server(
join_event_dict,
KNOWN_ROOM_VERSIONS[DEFAULT_ROOM_VERSION],
)
channel = self.make_signed_federation_request(
"PUT",
f"/_matrix/federation/v2/send_join/{self._room_id}/x?omit_members=true",
content=join_event_dict,
)
self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body)
# expect a reduced room state
returned_state = [
(ev["type"], ev["state_key"]) for ev in channel.json_body["state"]
]
self.assertCountEqual(
returned_state,
[
("m.room.create", ""),
("m.room.power_levels", ""),
("m.room.join_rules", ""),
("m.room.history_visibility", ""),
# Users included here because they're heroes.
("m.room.member", "@kermit:test"),
("m.room.member", "@fozzie:test"),
],
)
# the auth chain should not include anything already in "state"
returned_auth_chain_events = [
(ev["type"], ev["state_key"]) for ev in channel.json_body["auth_chain"]
]
self.assertCountEqual(
returned_auth_chain_events,
# TODO: change the test so that we get at least one event in the auth chain
# here.
[],
)
# the room should show that the new user is a member
r = self.get_success(
self._storage_controllers.state.get_current_state(self._room_id)
)
self.assertEqual(r[("m.room.member", joining_user)].membership, "join")
@override_config({"rc_joins_per_room": {"per_second": 0, "burst_count": 3}})
def test_make_join_respects_room_join_rate_limit(self) -> None:
# In the test setup, two users join the room. Since the rate limiter burst
# count is 3, a new make_join request to the room should be accepted.
joining_user = "@ronniecorbett:" + self.OTHER_SERVER_NAME
self._make_join(joining_user)
# Now have a new local user join the room. This saturates the rate limiter
# bucket, so the next make_join should be denied.
new_local_user = self.register_user("animal", "animal")
token = self.login("animal", "animal")
self.helper.join(self._room_id, new_local_user, tok=token)
joining_user = "@ronniebarker:" + self.OTHER_SERVER_NAME
channel = self.make_signed_federation_request(
"GET",
f"/_matrix/federation/v1/make_join/{self._room_id}/{joining_user}"
f"?ver={DEFAULT_ROOM_VERSION}",
)
self.assertEqual(channel.code, HTTPStatus.TOO_MANY_REQUESTS, channel.json_body)
@override_config({"rc_joins_per_room": {"per_second": 0, "burst_count": 3}})
def test_send_join_contributes_to_room_join_rate_limit_and_is_limited(self) -> None:
# Make two make_join requests up front. (These are rate limited, but do not
# contribute to the rate limit.)
join_event_dicts = []
for i in range(2):
joining_user = f"@misspiggy{i}:{self.OTHER_SERVER_NAME}"
join_result = self._make_join(joining_user)
join_event_dict = join_result["event"]
self.add_hashes_and_signatures_from_other_server(
join_event_dict,
KNOWN_ROOM_VERSIONS[DEFAULT_ROOM_VERSION],
)
join_event_dicts.append(join_event_dict)
# In the test setup, two users join the room. Since the rate limiter burst
# count is 3, the first send_join should be accepted...
channel = self.make_signed_federation_request(
"PUT",
f"/_matrix/federation/v2/send_join/{self._room_id}/join0",
content=join_event_dicts[0],
)
self.assertEqual(channel.code, 200, channel.json_body)
# ... but the second should be denied.
channel = self.make_signed_federation_request(
"PUT",
f"/_matrix/federation/v2/send_join/{self._room_id}/join1",
content=join_event_dicts[1],
)
self.assertEqual(channel.code, HTTPStatus.TOO_MANY_REQUESTS, channel.json_body)
# NB: we could write a test which checks that the send_join event is seen
# by other workers over replication, and that they update their rate limit
# buckets accordingly. I'm going to assume that the join event gets sent over
# replication, at which point the tests.handlers.room_member test
# test_local_users_joining_on_another_worker_contribute_to_rate_limit
# is probably sufficient to reassure that the bucket is updated.
def _create_acl_event(content: JsonDict) -> EventBase:
return make_event_from_dict(
{
"room_id": "!a:b",
"event_id": "$a:b",
"type": "m.room.server_acls",
"sender": "@a:b",
"content": content,
}
)
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