Matrix-Mirrors/anonymousland-synapse
1
0
Fork 0
mirror of https://git.anonymousland.org/anonymousland/synapse.git synced 2025-08-08 04:42:15 -04:00
Code Issues Projects Releases Packages Wiki Activity

add SpamChecker callback for silently dropping inbound federated events (#12744)

Browse source 
Signed-off-by: jesopo <github@lolnerd.net>
This commit is contained in:
Jess Porter 2022-05-23 17:36:21 +01:00 • committed by GitHub
parent 7a68203cde
commit a608ac847b
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
5 changed files with 108 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

40
synapse/events/spamcheck.py
View file

@ -44,6 +44,10 @@ CHECK_EVENT_FOR_SPAM_CALLBACK = Callable[
["synapse.events.EventBase"],
Awaitable[Union[bool, str]],
]
SHOULD_DROP_FEDERATED_EVENT_CALLBACK = Callable[
["synapse.events.EventBase"],
Awaitable[Union[bool, str]],
]
USER_MAY_JOIN_ROOM_CALLBACK = Callable[[str, str, bool], Awaitable[bool]]
USER_MAY_INVITE_CALLBACK = Callable[[str, str, str], Awaitable[bool]]
USER_MAY_SEND_3PID_INVITE_CALLBACK = Callable[[str, str, str, str], Awaitable[bool]]
@ -168,6 +172,9 @@ class SpamChecker:
self.clock = hs.get_clock()
self._check_event_for_spam_callbacks: List[CHECK_EVENT_FOR_SPAM_CALLBACK] = []
self._should_drop_federated_event_callbacks: List[
SHOULD_DROP_FEDERATED_EVENT_CALLBACK
] = []
self._user_may_join_room_callbacks: List[USER_MAY_JOIN_ROOM_CALLBACK] = []
self._user_may_invite_callbacks: List[USER_MAY_INVITE_CALLBACK] = []
self._user_may_send_3pid_invite_callbacks: List[
@ -191,6 +198,9 @@ class SpamChecker:
def register_callbacks(
self,
check_event_for_spam: Optional[CHECK_EVENT_FOR_SPAM_CALLBACK] = None,
should_drop_federated_event: Optional[
SHOULD_DROP_FEDERATED_EVENT_CALLBACK
] = None,
user_may_join_room: Optional[USER_MAY_JOIN_ROOM_CALLBACK] = None,
user_may_invite: Optional[USER_MAY_INVITE_CALLBACK] = None,
user_may_send_3pid_invite: Optional[USER_MAY_SEND_3PID_INVITE_CALLBACK] = None,
@ -209,6 +219,11 @@ class SpamChecker:
if check_event_for_spam is not None:
self._check_event_for_spam_callbacks.append(check_event_for_spam)
if should_drop_federated_event is not None:
self._should_drop_federated_event_callbacks.append(
should_drop_federated_event
)
if user_may_join_room is not None:
self._user_may_join_room_callbacks.append(user_may_join_room)
@ -268,6 +283,31 @@ class SpamChecker:
return False
async def should_drop_federated_event(
self, event: "synapse.events.EventBase"
) -> Union[bool, str]:
"""Checks if a given federated event is considered "spammy" by this
server.
If the server considers an event spammy, it will be silently dropped,
and in doing so will split-brain our view of the room's DAG.
Args:
event: the event to be checked
Returns:
True if the event should be silently dropped
"""
for callback in self._should_drop_federated_event_callbacks:
with Measure(
self.clock, "{}.{}".format(callback.__module__, callback.__qualname__)
):
res: Union[bool, str] = await delay_cancellation(callback(event))
if res:
return res
return False
async def user_may_join_room(
self, user_id: str, room_id: str, is_invited: bool
) -> bool: