diff options
| -rw-r--r-- | changelog.d/13276.feature | 1 | ||||
| -rw-r--r-- | docker/complement/conf/workers-shared-extra.yaml.j2 | 4 | ||||
| -rw-r--r-- | docs/upgrade.md | 10 | ||||
| -rw-r--r-- | docs/usage/configuration/config_documentation.md | 19 | ||||
| -rw-r--r-- | synapse/config/ratelimiting.py | 7 | ||||
| -rw-r--r-- | synapse/federation/federation_server.py | 16 | ||||
| -rw-r--r-- | synapse/handlers/federation_event.py | 4 | ||||
| -rw-r--r-- | synapse/handlers/message.py | 11 | ||||
| -rw-r--r-- | synapse/handlers/room_member.py | 37 | ||||
| -rw-r--r-- | synapse/replication/tcp/client.py | 17 | ||||
| -rw-r--r-- | synapse/replication/tcp/streams/events.py | 1 | ||||
| -rw-r--r-- | synapse/storage/databases/main/events_worker.py | 22 | ||||
| -rw-r--r-- | tests/federation/test_federation_server.py | 63 | ||||
| -rw-r--r-- | tests/handlers/test_room_member.py | 290 | ||||
| -rw-r--r-- | tests/rest/client/test_rooms.py | 4 | ||||
| -rw-r--r-- | tests/test_server.py | 2 | ||||
| -rw-r--r-- | tests/unittest.py | 4 | ||||
| -rw-r--r-- | tests/utils.py | 1 |
18 files changed, 498 insertions, 15 deletions
diff --git a/changelog.d/13276.feature b/changelog.d/13276.feature new file mode 100644 index 0000000000..068d158ed5 --- /dev/null +++ b/changelog.d/13276.feature @@ -0,0 +1 @@ +Add per-room rate limiting for room joins. For each room, Synapse now monitors the rate of join events in that room, and throttle additional joins if that rate grows too large. diff --git a/docker/complement/conf/workers-shared-extra.yaml.j2 b/docker/complement/conf/workers-shared-extra.yaml.j2 index b5f675bc73..9e554a865e 100644 --- a/docker/complement/conf/workers-shared-extra.yaml.j2 +++ b/docker/complement/conf/workers-shared-extra.yaml.j2 @@ -67,6 +67,10 @@ rc_joins: per_second: 9999 burst_count: 9999 +rc_joins_per_room: + per_second: 9999 + burst_count: 9999 + rc_3pid_validation: per_second: 1000 burst_count: 1000 diff --git a/docs/upgrade.md b/docs/upgrade.md index 3aaeb499ce..2c7c258909 100644 --- a/docs/upgrade.md +++ b/docs/upgrade.md @@ -104,6 +104,16 @@ minimum, a `notif_from` setting.) Specifying an `email` setting under `account_threepid_delegates` will now cause an error at startup. +## Changes to the event replication streams + +Synapse now includes a flag indicating if an event is an outlier when +replicating it to other workers. This is a forwards- and backwards-incompatible +change: v1.63 and workers cannot process events replicated by v1.64 workers, and +vice versa. + +Once all workers are upgraded to v1.64 (or downgraded to v1.63), event +replication will resume as normal. + # Upgrading to v1.62.0 ## New signatures for spam checker callbacks diff --git a/docs/usage/configuration/config_documentation.md b/docs/usage/configuration/config_documentation.md index 5fe502e33a..be272a400c 100644 --- a/docs/usage/configuration/config_documentation.md +++ b/docs/usage/configuration/config_documentation.md @@ -1472,6 +1472,25 @@ rc_joins: burst_count: 12 ``` --- +### `rc_joins_per_room` + +This option allows admins to ratelimit joins to a room based on the number of recent +joins (local or remote) to that room. It is intended to mitigate mass-join spam +waves which target multiple homeservers. + +By default, one join is permitted to a room every second, with an accumulating +buffer of up to ten instantaneous joins. + +Example configuration (default values): +```yaml +rc_joins_per_room: + per_second: 1 + burst_count: 10 +``` + +_Added in Synapse 1.64.0._ + +--- ### `rc_3pid_validation` This option ratelimits how often a user or IP can attempt to validate a 3PID. diff --git a/synapse/config/ratelimiting.py b/synapse/config/ratelimiting.py index 4fc1784efe..5a91917b4a 100644 --- a/synapse/config/ratelimiting.py +++ b/synapse/config/ratelimiting.py @@ -112,6 +112,13 @@ class RatelimitConfig(Config): defaults={"per_second": 0.01, "burst_count": 10}, ) + # Track the rate of joins to a given room. If there are too many, temporarily + # prevent local joins and remote joins via this server. + self.rc_joins_per_room = RateLimitConfig( + config.get("rc_joins_per_room", {}), + defaults={"per_second": 1, "burst_count": 10}, + ) + # Ratelimit cross-user key requests: # * For local requests this is keyed by the sending device. # * For requests received over federation this is keyed by the origin. diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py index 5dfdc86740..ae550d3f4d 100644 --- a/synapse/federation/federation_server.py +++ b/synapse/federation/federation_server.py @@ -118,6 +118,7 @@ class FederationServer(FederationBase): self._federation_event_handler = hs.get_federation_event_handler() self.state = hs.get_state_handler() self._event_auth_handler = hs.get_event_auth_handler() + self._room_member_handler = hs.get_room_member_handler() self._state_storage_controller = hs.get_storage_controllers().state @@ -621,6 +622,15 @@ class FederationServer(FederationBase): ) raise IncompatibleRoomVersionError(room_version=room_version) + # Refuse the request if that room has seen too many joins recently. + # This is in addition to the HS-level rate limiting applied by + # BaseFederationServlet. + # type-ignore: mypy doesn't seem able to deduce the type of the limiter(!?) + await self._room_member_handler._join_rate_per_room_limiter.ratelimit( # type: ignore[has-type] + requester=None, + key=room_id, + update=False, + ) pdu = await self.handler.on_make_join_request(origin, room_id, user_id) return {"event": pdu.get_templated_pdu_json(), "room_version": room_version} @@ -655,6 +665,12 @@ class FederationServer(FederationBase): room_id: str, caller_supports_partial_state: bool = False, ) -> Dict[str, Any]: + await self._room_member_handler._join_rate_per_room_limiter.ratelimit( # type: ignore[has-type] + requester=None, + key=room_id, + update=False, + ) + event, context = await self._on_send_membership_event( origin, content, Membership.JOIN, room_id ) diff --git a/synapse/handlers/federation_event.py b/synapse/handlers/federation_event.py index b1dab57447..766d9849f5 100644 --- a/synapse/handlers/federation_event.py +++ b/synapse/handlers/federation_event.py @@ -1980,6 +1980,10 @@ class FederationEventHandler: event, event_pos, max_stream_token, extra_users=extra_users ) + if event.type == EventTypes.Member and event.membership == Membership.JOIN: + # TODO retrieve the previous state, and exclude join -> join transitions + self._notifier.notify_user_joined_room(event.event_id, event.room_id) + def _sanity_check_event(self, ev: EventBase) -> None: """ Do some early sanity checks of a received event diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index 85abe71ea8..bd7baef051 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -463,6 +463,7 @@ class EventCreationHandler: ) self._events_shard_config = self.config.worker.events_shard_config self._instance_name = hs.get_instance_name() + self._notifier = hs.get_notifier() self.room_prejoin_state_types = self.hs.config.api.room_prejoin_state @@ -1550,6 +1551,16 @@ class EventCreationHandler: requester, is_admin_redaction=is_admin_redaction ) + if event.type == EventTypes.Member and event.membership == Membership.JOIN: + ( + current_membership, + _, + ) = await self.store.get_local_current_membership_for_user_in_room( + event.state_key, event.room_id + ) + if current_membership != Membership.JOIN: + self._notifier.notify_user_joined_room(event.event_id, event.room_id) + await self._maybe_kick_guest_users(event, context) if event.type == EventTypes.CanonicalAlias: diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py index a5b9ac904e..30b4cb23df 100644 --- a/synapse/handlers/room_member.py +++ b/synapse/handlers/room_member.py @@ -94,12 +94,29 @@ class RoomMemberHandler(metaclass=abc.ABCMeta): rate_hz=hs.config.ratelimiting.rc_joins_local.per_second, burst_count=hs.config.ratelimiting.rc_joins_local.burst_count, ) + # Tracks joins from local users to rooms this server isn't a member of. + # I.e. joins this server makes by requesting /make_join /send_join from + # another server. self._join_rate_limiter_remote = Ratelimiter( store=self.store, clock=self.clock, rate_hz=hs.config.ratelimiting.rc_joins_remote.per_second, burst_count=hs.config.ratelimiting.rc_joins_remote.burst_count, ) + # TODO: find a better place to keep this Ratelimiter. + # It needs to be + # - written to by event persistence code + # - written to by something which can snoop on replication streams + # - read by the RoomMemberHandler to rate limit joins from local users + # - read by the FederationServer to rate limit make_joins and send_joins from + # other homeservers + # I wonder if a homeserver-wide collection of rate limiters might be cleaner? + self._join_rate_per_room_limiter = Ratelimiter( + store=self.store, + clock=self.clock, + rate_hz=hs.config.ratelimiting.rc_joins_per_room.per_second, + burst_count=hs.config.ratelimiting.rc_joins_per_room.burst_count, + ) # Ratelimiter for invites, keyed by room (across all issuers, all # recipients). @@ -136,6 +153,18 @@ class RoomMemberHandler(metaclass=abc.ABCMeta): ) self.request_ratelimiter = hs.get_request_ratelimiter() + hs.get_notifier().add_new_join_in_room_callback(self._on_user_joined_room) + + def _on_user_joined_room(self, event_id: str, room_id: str) -> None: + """Notify the rate limiter that a room join has occurred. + + Use this to inform the RoomMemberHandler about joins that have either + - taken place on another homeserver, or + - on another worker in this homeserver. + Joins actioned by this worker should use the usual `ratelimit` method, which + checks the limit and increments the counter in one go. + """ + self._join_rate_per_room_limiter.record_action(requester=None, key=room_id) @abc.abstractmethod async def _remote_join( @@ -396,6 +425,9 @@ class RoomMemberHandler(metaclass=abc.ABCMeta): # up blocking profile updates. if newly_joined and ratelimit: await self._join_rate_limiter_local.ratelimit(requester) + await self._join_rate_per_room_limiter.ratelimit( + requester, key=room_id, update=False + ) result_event = await self.event_creation_handler.handle_new_client_event( requester, @@ -867,6 +899,11 @@ class RoomMemberHandler(metaclass=abc.ABCMeta): await self._join_rate_limiter_remote.ratelimit( requester, ) + await self._join_rate_per_room_limiter.ratelimit( + requester, + key=room_id, + update=False, + ) inviter = await self._get_inviter(target.to_string(), room_id) if inviter and not self.hs.is_mine(inviter): diff --git a/synapse/replication/tcp/client.py b/synapse/replication/tcp/client.py index 2f59245058..e4f2201c92 100644 --- a/synapse/replication/tcp/client.py +++ b/synapse/replication/tcp/client.py @@ -21,7 +21,7 @@ from twisted.internet.interfaces import IAddress, IConnector from twisted.internet.protocol import ReconnectingClientFactory from twisted.python.failure import Failure -from synapse.api.constants import EventTypes, ReceiptTypes +from synapse.api.constants import EventTypes, Membership, ReceiptTypes from synapse.federation import send_queue from synapse.federation.sender import FederationSender from synapse.logging.context import PreserveLoggingContext, make_deferred_yieldable @@ -219,6 +219,21 @@ class ReplicationDataHandler: membership=row.data.membership, ) + # If this event is a join, make a note of it so we have an accurate + # cross-worker room rate limit. + # TODO: Erik said we should exclude rows that came from ex_outliers + # here, but I don't see how we can determine that. I guess we could + # add a flag to row.data? + if ( + row.data.type == EventTypes.Member + and row.data.membership == Membership.JOIN + and not row.data.outlier + ): + # TODO retrieve the previous state, and exclude join -> join transitions + self.notifier.notify_user_joined_room( + row.data.event_id, row.data.room_id + ) + await self._presence_handler.process_replication_rows( stream_name, instance_name, token, rows ) diff --git a/synapse/replication/tcp/streams/events.py b/synapse/replication/tcp/streams/events.py index 26f4fa7cfd..14b6705862 100644 --- a/synapse/replication/tcp/streams/events.py +++ b/synapse/replication/tcp/streams/events.py @@ -98,6 +98,7 @@ class EventsStreamEventRow(BaseEventsStreamRow): relates_to: Optional[str] membership: Optional[str] rejected: bool + outlier: bool @attr.s(slots=True, frozen=True, auto_attribs=True) diff --git a/synapse/storage/databases/main/events_worker.py b/synapse/storage/databases/main/events_worker.py index 4435373146..5914a35420 100644 --- a/synapse/storage/databases/main/events_worker.py +++ b/synapse/storage/databases/main/events_worker.py @@ -1490,7 +1490,7 @@ class EventsWorkerStore(SQLBaseStore): async def get_all_new_forward_event_rows( self, instance_name: str, last_id: int, current_id: int, limit: int - ) -> List[Tuple[int, str, str, str, str, str, str, str, str]]: + ) -> List[Tuple[int, str, str, str, str, str, str, str, bool, bool]]: """Returns new events, for the Events replication stream Args: @@ -1506,10 +1506,11 @@ class EventsWorkerStore(SQLBaseStore): def get_all_new_forward_event_rows( txn: LoggingTransaction, - ) -> List[Tuple[int, str, str, str, str, str, str, str, str]]: + ) -> List[Tuple[int, str, str, str, str, str, str, str, bool, bool]]: sql = ( "SELECT e.stream_ordering, e.event_id, e.room_id, e.type," - " se.state_key, redacts, relates_to_id, membership, rejections.reason IS NOT NULL" + " se.state_key, redacts, relates_to_id, membership, rejections.reason IS NOT NULL," + " e.outlier" " FROM events AS e" " LEFT JOIN redactions USING (event_id)" " LEFT JOIN state_events AS se USING (event_id)" @@ -1523,7 +1524,8 @@ class EventsWorkerStore(SQLBaseStore): ) txn.execute(sql, (last_id, current_id, instance_name, limit)) return cast( - List[Tuple[int, str, str, str, str, str, str, str, str]], txn.fetchall() + List[Tuple[int, str, str, str, str, str, str, str, bool, bool]], + txn.fetchall(), ) return await self.db_pool.runInteraction( @@ -1532,7 +1534,7 @@ class EventsWorkerStore(SQLBaseStore): async def get_ex_outlier_stream_rows( self, instance_name: str, last_id: int, current_id: int - ) -> List[Tuple[int, str, str, str, str, str, str, str, str]]: + ) -> List[Tuple[int, str, str, str, str, str, str, str, bool, bool]]: """Returns de-outliered events, for the Events replication stream Args: @@ -1547,11 +1549,14 @@ class EventsWorkerStore(SQLBaseStore): def get_ex_outlier_stream_rows_txn( txn: LoggingTransaction, - ) -> List[Tuple[int, str, str, str, str, str, str, str, str]]: + ) -> List[Tuple[int, str, str, str, str, str, str, str, bool, bool]]: sql = ( "SELECT event_stream_ordering, e.event_id, e.room_id, e.type," - " se.state_key, redacts, relates_to_id, membership, rejections.reason IS NOT NULL" + " se.state_key, redacts, relates_to_id, membership, rejections.reason IS NOT NULL," + " e.outlier" " FROM events AS e" + # NB: the next line (inner join) is what makes this query different from + # get_all_new_forward_event_rows. " INNER JOIN ex_outlier_stream AS out USING (event_id)" " LEFT JOIN redactions USING (event_id)" " LEFT JOIN state_events AS se USING (event_id)" @@ -1566,7 +1571,8 @@ class EventsWorkerStore(SQLBaseStore): txn.execute(sql, (last_id, current_id, instance_name)) return cast( - List[Tuple[int, str, str, str, str, str, str, str, str]], txn.fetchall() + List[Tuple[int, str, str, str, str, str, str, str, bool, bool]], + txn.fetchall(), ) return await self.db_pool.runInteraction( diff --git a/tests/federation/test_federation_server.py b/tests/federation/test_federation_server.py index 8ea13ceb93..3a6ef221ae 100644 --- a/tests/federation/test_federation_server.py +++ b/tests/federation/test_federation_server.py @@ -148,7 +148,7 @@ class SendJoinFederationTests(unittest.FederatingHomeserverTestCase): tok2 = self.login("fozzie", "bear") self.helper.join(self._room_id, second_member_user_id, tok=tok2) - def _make_join(self, user_id) -> JsonDict: + 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}" @@ -260,6 +260,67 @@ class SendJoinFederationTests(unittest.FederatingHomeserverTestCase): ) 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): return make_event_from_dict( diff --git a/tests/handlers/test_room_member.py b/tests/handlers/test_room_member.py new file mode 100644 index 0000000000..254e7e4b80 --- /dev/null +++ b/tests/handlers/test_room_member.py @@ -0,0 +1,290 @@ +from http import HTTPStatus +from unittest.mock import Mock, patch + +from twisted.test.proto_helpers import MemoryReactor + +import synapse.rest.admin +import synapse.rest.client.login +import synapse.rest.client.room +from synapse.api.constants import EventTypes, Membership +from synapse.api.errors import LimitExceededError +from synapse.crypto.event_signing import add_hashes_and_signatures +from synapse.events import FrozenEventV3 +from synapse.federation.federation_client import SendJoinResult +from synapse.server import HomeServer +from synapse.types import UserID, create_requester +from synapse.util import Clock + +from tests.replication._base import RedisMultiWorkerStreamTestCase +from tests.server import make_request +from tests.test_utils import make_awaitable +from tests.unittest import FederatingHomeserverTestCase, override_config + + +class TestJoinsLimitedByPerRoomRateLimiter(FederatingHomeserverTestCase): + servlets = [ + synapse.rest.admin.register_servlets, + synapse.rest.client.login.register_servlets, + synapse.rest.client.room.register_servlets, + ] + + def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None: + self.handler = hs.get_room_member_handler() + + # Create three users. + self.alice = self.register_user("alice", "pass") + self.alice_token = self.login("alice", "pass") + self.bob = self.register_user("bob", "pass") + self.bob_token = self.login("bob", "pass") + self.chris = self.register_user("chris", "pass") + self.chris_token = self.login("chris", "pass") + + # Create a room on this homeserver. Note that this counts as a join: it + # contributes to the rate limter's count of actions + self.room_id = self.helper.create_room_as(self.alice, tok=self.alice_token) + + self.intially_unjoined_room_id = f"!example:{self.OTHER_SERVER_NAME}" + + @override_config({"rc_joins_per_room": {"per_second": 0, "burst_count": 2}}) + def test_local_user_local_joins_contribute_to_limit_and_are_limited(self) -> None: + # The rate limiter has accumulated one token from Alice's join after the create + # event. + # Try joining the room as Bob. + self.get_success( + self.handler.update_membership( + requester=create_requester(self.bob), + target=UserID.from_string(self.bob), + room_id=self.room_id, + action=Membership.JOIN, + ) + ) + + # The rate limiter bucket is full. A second join should be denied. + self.get_failure( + self.handler.update_membership( + requester=create_requester(self.chris), + target=UserID.from_string(self.chris), + room_id=self.room_id, + action=Membership.JOIN, + ), + LimitExceededError, + ) + + @override_config({"rc_joins_per_room": {"per_second": 0, "burst_count": 2}}) + def test_local_user_profile_edits_dont_contribute_to_limit(self) -> None: + # The rate limiter has accumulated one token from Alice's join after the create + # event. Alice should still be able to change her displayname. + self.get_success( + self.handler.update_membership( + requester=create_requester(self.alice), + target=UserID.from_string(self.alice), + room_id=self.room_id, + action=Membership.JOIN, + content={"displayname": "Alice Cooper"}, + ) + ) + + # Still room in the limiter bucket. Chris's join should be accepted. + self.get_success( + self.handler.update_membership( + requester=create_requester(self.chris), + target=UserID.from_string(self.chris), + room_id=self.room_id, + action=Membership.JOIN, + ) + ) + + @override_config({"rc_joins_per_room": {"per_second": 0, "burst_count": 1}}) + def test_remote_joins_contribute_to_rate_limit(self) -> None: + # Join once, to fill the rate limiter bucket. + # + # To do this we have to mock the responses from the remote homeserver. + # We also patch out a bunch of event checks on our end. All we're really + # trying to check here is that remote joins will bump the rate limter when + # they are persisted. + create_event_source = { + "auth_events": [], + "content": { + "creator": f"@creator:{self.OTHER_SERVER_NAME}", + "room_version": self.hs.config.server.default_room_version.identifier, + }, + "depth": 0, + "origin_server_ts": 0, + "prev_events": [], + "room_id": self.intially_unjoined_room_id, + "sender": f"@creator:{self.OTHER_SERVER_NAME}", + "state_key": "", + "type": EventTypes.Create, + } + self.add_hashes_and_signatures_from_other_server( + create_event_source, + self.hs.config.server.default_room_version, + ) + create_event = FrozenEventV3( + create_event_source, + self.hs.config.server.default_room_version, + {}, + None, + ) + + join_event_source = { + "auth_events": [create_event.event_id], + "content": {"membership": "join"}, + "depth": 1, + "origin_server_ts": 100, + "prev_events": [create_event.event_id], + "sender": self.bob, + "state_key": self.bob, + "room_id": self.intially_unjoined_room_id, + "type": EventTypes.Member, + } + add_hashes_and_signatures( + self.hs.config.server.default_room_version, + join_event_source, + self.hs.hostname, + self.hs.signing_key, + ) + join_event = FrozenEventV3( + join_event_source, + self.hs.config.server.default_room_version, + {}, + None, + ) + + mock_make_membership_event = Mock( + return_value=make_awaitable( + ( + self.OTHER_SERVER_NAME, + join_event, + self.hs.config.server.default_room_version, + ) + ) + ) + mock_send_join = Mock( + return_value=make_awaitable( + SendJoinResult( + join_event, + self.OTHER_SERVER_NAME, + state=[create_event], + auth_chain=[create_event], + partial_state=False, + servers_in_room=[], + ) + ) + ) + + with patch.object( + self.handler.federation_handler.federation_client, + "make_membership_event", + mock_make_membership_event, + ), patch.object( + self.handler.federation_handler.federation_client, + "send_join", + mock_send_join, + ), patch( + "synapse.event_auth._is_membership_change_allowed", + return_value=None, + ), patch( + "synapse.handlers.federation_event.check_state_dependent_auth_rules", + return_value=None, + ): + self.get_success( + self.handler.update_membership( + requester=create_requester(self.bob), + target=UserID.from_string(self.bob), + room_id=self.intially_unjoined_room_id, + action=Membership.JOIN, + remote_room_hosts=[self.OTHER_SERVER_NAME], + ) + ) + + # Try to join as Chris. Should get denied. + self.get_failure( + self.handler.update_membership( + requester=create_requester(self.chris), + target=UserID.from_string(self.chris), + room_id=self.intially_unjoined_room_id, + action=Membership.JOIN, + remote_room_hosts=[self.OTHER_SERVER_NAME], + ), + LimitExceededError, + ) + + # TODO: test that remote joins to a room are rate limited. + # Could do this by setting the burst count to 1, then: + # - remote-joining a room + # - immediately leaving + # - trying to remote-join again. + + +class TestReplicatedJoinsLimitedByPerRoomRateLimiter(RedisMultiWorkerStreamTestCase): + servlets = [ + synapse.rest.admin.register_servlets, + synapse.rest.client.login.register_servlets, + synapse.rest.client.room.register_servlets, + ] + + def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None: + self.handler = hs.get_room_member_handler() + + # Create three users. + self.alice = self.register_user("alice", "pass") + self.alice_token = self.login("alice", "pass") + self.bob = self.register_user("bob", "pass") + self.bob_token = self.login("bob", "pass") + self.chris = self.register_user("chris", "pass") + self.chris_token = self.login("chris", "pass") + + # Create a room on this homeserver. + # Note that this counts as a + self.room_id = self.helper.create_room_as(self.alice, tok=self.alice_token) + self.intially_unjoined_room_id = "!example:otherhs" + + @override_config({"rc_joins_per_room": {"per_second": 0, "burst_count": 2}}) + def test_local_users_joining_on_another_worker_contribute_to_rate_limit( + self, + ) -> None: + # The rate limiter has accumulated one token from Alice's join after the create + # event. + self.replicate() + + # Spawn another worker and have bob join via it. + worker_app = self.make_worker_hs( + "synapse.app.generic_worker", extra_config={"worker_name": "other worker"} + ) + worker_site = self._hs_to_site[worker_app] + channel = make_request( + self.reactor, + worker_site, + "POST", + f"/_matrix/client/v3/rooms/{self.room_id}/join", + access_token=self.bob_token, + ) + self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body) + + # wait for join to arrive over replication + self.replicate() + + # Try to join as Chris on the worker. Should get denied because Alice + # and Bob have both joined the room. + self.get_failure( + worker_app.get_room_member_handler().update_membership( + requester=create_requester(self.chris), + target=UserID.from_string(self.chris), + room_id=self.room_id, + action=Membership.JOIN, + ), + LimitExceededError, + ) + + # Try to join as Chris on the original worker. Should get denied because Alice + # and Bob have both joined the room. + self.get_failure( + self.handler.update_membership( + requester=create_requester(self.chris), + target=UserID.from_string(self.chris), + room_id=self.room_id, + action=Membership.JOIN, + ), + LimitExceededError, + ) diff --git a/tests/rest/client/test_rooms.py b/tests/rest/client/test_rooms.py index 17571b2d33..c45cb32090 100644 --- a/tests/rest/client/test_rooms.py +++ b/tests/rest/client/test_rooms.py @@ -710,7 +710,7 @@ class RoomsCreateTestCase(RoomBase): self.assertEqual(HTTPStatus.OK, channel.code, channel.result) self.assertTrue("room_id" in channel.json_body) assert channel.resource_usage is not None - self.assertEqual(43, channel.resource_usage.db_txn_count) + self.assertEqual(44, channel.resource_usage.db_txn_count) def test_post_room_initial_state(self) -> None: # POST with initial_state config key, expect new room id @@ -723,7 +723,7 @@ class RoomsCreateTestCase(RoomBase): self.assertEqual(HTTPStatus.OK, channel.code, channel.result) self.assertTrue("room_id" in channel.json_body) assert channel.resource_usage is not None - self.assertEqual(49, channel.resource_usage.db_txn_count) + self.assertEqual(50, channel.resource_usage.db_txn_count) def test_post_room_visibility_key(self) -> None: # POST with visibility config key, expect new room id diff --git a/tests/test_server.py b/tests/test_server.py index fc4bce899c..2fe4411401 100644 --- a/tests/test_server.py +++ b/tests/test_server.py @@ -231,7 +231,7 @@ class OptionsResourceTests(unittest.TestCase): parse_listener_def({"type": "http", "port": 0}), self.resource, "1.0", - max_request_body_size=1234, + max_request_body_size=4096, reactor=self.reactor, ) diff --git a/tests/unittest.py b/tests/unittest.py index 9f1ff774a8..66ce92f4a6 100644 --- a/tests/unittest.py +++ b/tests/unittest.py @@ -284,7 +284,7 @@ class HomeserverTestCase(TestCase): config=self.hs.config.server.listeners[0], resource=self.resource, server_version_string="1", - max_request_body_size=1234, + max_request_body_size=4096, reactor=self.reactor, ) @@ -773,7 +773,7 @@ class FederatingHomeserverTestCase(HomeserverTestCase): verify_key_id, FetchKeyResult( verify_key=verify_key, - valid_until_ts=clock.time_msec() + 1000, + valid_until_ts=clock.time_msec() + 10000, ), ) ], diff --git a/tests/utils.py b/tests/utils.py index 424cc4c2a0..d2c6d1e852 100644 --- a/tests/utils.py +++ b/tests/utils.py @@ -167,6 +167,7 @@ def default_config( "local": {"per_second": 10000, "burst_count": 10000}, "remote": {"per_second": 10000, "burst_count": 10000}, }, + "rc_joins_per_room": {"per_second": 10000, "burst_count": 10000}, "rc_invites": { "per_room": {"per_second": 10000, "burst_count": 10000}, "per_user": {"per_second": 10000, "burst_count": 10000}, |