Matrix-Mirrors/synapse-product
1
0
Fork 0
mirror of https://git.anonymousland.org/anonymousland/synapse-product.git synced 2024-12-23 18:59:26 -05:00
Code Issues Packages Projects Releases Wiki Activity

Check events on backfill too

Browse Source
This commit is contained in:
Richard van der Hoff 2018-04-17 23:41:12 +01:00
parent 9b7794262f
commit e585228860
1 changed files with 42 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
synapse/handlers/federation.py
View File

@ -119,23 +119,14 @@ class FederationHandler(BaseHandler):
# do some initial sanity-checking of the event. In particular, make
# sure it doesn't have hundreds of prev_events or auth_events, which
# could cause a huge state resolution or cascade of event fetches
if len(pdu.prev_events) > 20:
logger.warn("Rejecting event %s which has %i prev_events",
pdu.event_id, len(pdu.prev_events))
# could cause a huge state resolution or cascade of event fetches.
try:
self._sanity_check_event(pdu)
except SynapseError as err:
raise FederationError(
"ERROR",
httplib.BAD_REQUEST,
"Too many prev_events",
affected=pdu.event_id,
)
if len(pdu.auth_events) > 10:
logger.warn("Rejecting event %s which has %i auth_events",
pdu.event_id, len(pdu.auth_events))
raise FederationError(
"ERROR",
httplib.BAD_REQUEST,
"Too many auth_events",
err.code,
err.msg,
affected=pdu.event_id,
)
@ -565,6 +556,9 @@ class FederationHandler(BaseHandler):
extremities=extremities,
)
for ev in events:
self._sanity_check_event(ev)
# Don't bother processing events we already have.
seen_events = yield self.store.have_events_in_timeline(
set(e.event_id for e in events)
@ -867,6 +861,39 @@ class FederationHandler(BaseHandler):
defer.returnValue(False)
def _sanity_check_event(self, ev):
"""
Do some early sanity checks of a received event
In particular, checks it doesn't have an excessive number of
prev_events or auth_events, which could cause a huge state resolution
or cascade of event fetches.
Args:
ev (synapse.events.EventBase): event to be checked
Returns: None
Raises:
SynapseError if the event does not pass muster
"""
if len(ev.prev_events) > 20:
logger.warn("Rejecting event %s which has %i prev_events",
ev.event_id, len(ev.prev_events))
raise SynapseError(
httplib.BAD_REQUEST,
"Too many prev_events",
)
if len(ev.auth_events) > 10:
logger.warn("Rejecting event %s which has %i auth_events",
ev.event_id, len(ev.auth_events))
raise SynapseError(
"ERROR",
httplib.BAD_REQUEST,
"Too many auth_events",
)
@defer.inlineCallbacks
def send_invite(self, target_host, event):
""" Sends the invite to the remote server for signing.