diff options
Diffstat (limited to 'synapse/handlers/federation.py')
| -rw-r--r-- | synapse/handlers/federation.py | 207 |
1 files changed, 132 insertions, 75 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 97e3c503b9..14c26d8cea 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -126,7 +126,7 @@ class FederationHandler(BaseHandler): if not state: state, auth_chain = yield replication.get_state_for_room( - origin, context=event.room_id, event_id=event.event_id, + origin, room_id=event.room_id, event_id=event.event_id, ) if not auth_chain: @@ -139,7 +139,7 @@ class FederationHandler(BaseHandler): for e in auth_chain: e.internal_metadata.outlier = True try: - yield self._handle_new_event(e, fetch_auth_from=origin) + yield self._handle_new_event(origin, e) except: logger.exception( "Failed to handle auth event %s", @@ -152,7 +152,7 @@ class FederationHandler(BaseHandler): for e in state: e.internal_metadata.outlier = True try: - yield self._handle_new_event(e) + yield self._handle_new_event(origin, e) except: logger.exception( "Failed to handle state event %s", @@ -161,6 +161,7 @@ class FederationHandler(BaseHandler): try: yield self._handle_new_event( + origin, event, state=state, backfilled=backfilled, @@ -363,7 +364,14 @@ class FederationHandler(BaseHandler): for e in auth_chain: e.internal_metadata.outlier = True try: - yield self._handle_new_event(e) + auth_ids = [e_id for e_id, _ in e.auth_events] + auth = { + (e.type, e.state_key): e for e in auth_chain + if e.event_id in auth_ids + } + yield self._handle_new_event( + target_host, e, auth_events=auth + ) except: logger.exception( "Failed to handle auth event %s", @@ -374,8 +382,13 @@ class FederationHandler(BaseHandler): # FIXME: Auth these. e.internal_metadata.outlier = True try: + auth_ids = [e_id for e_id, _ in e.auth_events] + auth = { + (e.type, e.state_key): e for e in auth_chain + if e.event_id in auth_ids + } yield self._handle_new_event( - e, fetch_auth_from=target_host + target_host, e, auth_events=auth ) except: logger.exception( @@ -384,6 +397,7 @@ class FederationHandler(BaseHandler): ) yield self._handle_new_event( + target_host, new_event, state=state, current_state=state, @@ -450,7 +464,7 @@ class FederationHandler(BaseHandler): event.internal_metadata.outlier = False - context = yield self._handle_new_event(event) + context = yield self._handle_new_event(origin, event) logger.debug( "on_send_join_request: After _handle_new_event: %s, sigs: %s", @@ -651,11 +665,12 @@ class FederationHandler(BaseHandler): waiters.pop().callback(None) @defer.inlineCallbacks - def _handle_new_event(self, event, state=None, backfilled=False, - current_state=None, fetch_auth_from=None): + @log_function + def _handle_new_event(self, origin, event, state=None, backfilled=False, + current_state=None, auth_events=None): logger.debug( - "_handle_new_event: Before annotate: %s, sigs: %s", + "_handle_new_event: %s, sigs: %s", event.event_id, event.signatures, ) @@ -663,62 +678,34 @@ class FederationHandler(BaseHandler): event, old_state=state ) + if not auth_events: + auth_events = context.auth_events + logger.debug( - "_handle_new_event: Before auth fetch: %s, sigs: %s", - event.event_id, event.signatures, + "_handle_new_event: %s, auth_events: %s", + event.event_id, auth_events, ) is_new_state = not event.internal_metadata.is_outlier() - known_ids = set( - [s.event_id for s in context.auth_events.values()] - ) - - for e_id, _ in event.auth_events: - if e_id not in known_ids: - e = yield self.store.get_event(e_id, allow_none=True) - - if not e and fetch_auth_from is not None: - # Grab the auth_chain over federation if we are missing - # auth events. - auth_chain = yield self.replication_layer.get_event_auth( - fetch_auth_from, event.event_id, event.room_id - ) - for auth_event in auth_chain: - yield self._handle_new_event(auth_event) - e = yield self.store.get_event(e_id, allow_none=True) - - if not e: - # TODO: Do some conflict res to make sure that we're - # not the ones who are wrong. - logger.info( - "Rejecting %s as %s not in db or %s", - event.event_id, e_id, known_ids, - ) - # FIXME: How does raising AuthError work with federation? - raise AuthError(403, "Cannot find auth event") - - context.auth_events[(e.type, e.state_key)] = e - - logger.debug( - "_handle_new_event: Before hack: %s, sigs: %s", - event.event_id, event.signatures, - ) - + # This is a hack to fix some old rooms where the initial join event + # didn't reference the create event in its auth events. if event.type == EventTypes.Member and not event.auth_events: if len(event.prev_events) == 1: c = yield self.store.get_event(event.prev_events[0][0]) if c.type == EventTypes.Create: - context.auth_events[(c.type, c.state_key)] = c - - logger.debug( - "_handle_new_event: Before auth check: %s, sigs: %s", - event.event_id, event.signatures, - ) + auth_events[(c.type, c.state_key)] = c try: - self.auth.check(event, auth_events=context.auth_events) - except AuthError: + yield self.do_auth( + origin, event, context, auth_events=auth_events + ) + except AuthError as e: + logger.warn( + "Rejecting %s because %s", + event.event_id, e.msg + ) + # TODO: Store rejection. context.rejected = RejectedReason.AUTH_ERROR @@ -731,11 +718,6 @@ class FederationHandler(BaseHandler): ) raise - logger.debug( - "_handle_new_event: Before persist_event: %s, sigs: %s", - event.event_id, event.signatures, - ) - yield self.store.persist_event( event, context=context, @@ -744,25 +726,73 @@ class FederationHandler(BaseHandler): current_state=current_state, ) - logger.debug( - "_handle_new_event: After persist_event: %s, sigs: %s", - event.event_id, event.signatures, + defer.returnValue(context) + + @defer.inlineCallbacks + def on_query_auth(self, origin, event_id, remote_auth_chain, rejects, + missing): + # Just go through and process each event in `remote_auth_chain`. We + # don't want to fall into the trap of `missing` being wrong. + for e in remote_auth_chain: + try: + yield self._handle_new_event(origin, e) + except AuthError: + pass + + # Now get the current auth_chain for the event. + local_auth_chain = yield self.store.get_auth_chain([event_id]) + + # TODO: Check if we would now reject event_id. If so we need to tell + # everyone. + + ret = yield self.construct_auth_difference( + local_auth_chain, remote_auth_chain ) - defer.returnValue(context) + logger.debug("on_query_auth reutrning: %s", ret) + + defer.returnValue(ret) @defer.inlineCallbacks - def do_auth(self, origin, event, context): - for e_id, _ in event.auth_events: - pass + @log_function + def do_auth(self, origin, event, context, auth_events): + # Check if we have all the auth events. + res = yield self.store.have_events( + [e_id for e_id, _ in event.auth_events] + ) - auth_events = set(e_id for e_id, _ in event.auth_events) - current_state = set(e.event_id for e in context.auth_events.values()) + event_auth_events = set(e_id for e_id, _ in event.auth_events) + seen_events = set(res.keys()) - missing_auth = auth_events - current_state + missing_auth = event_auth_events - seen_events if missing_auth: + logger.debug("Missing auth: %s", missing_auth) + # If we don't have all the auth events, we need to get them. + remote_auth_chain = yield self.replication_layer.get_event_auth( + origin, event.room_id, event.event_id + ) + + for e in remote_auth_chain: + try: + auth_ids = [e_id for e_id, _ in e.auth_events] + auth = { + (e.type, e.state_key): e for e in remote_auth_chain + if e.event_id in auth_ids + } + yield self._handle_new_event( + origin, e, auth_events=auth + ) + auth_events[(e.type, e.state_key)] = e + except AuthError: + pass + + current_state = set(e.event_id for e in auth_events.values()) + different_auth = event_auth_events - current_state + + if different_auth and not event.internal_metadata.is_outlier(): # Do auth conflict res. + logger.debug("Different auth: %s", different_auth) # 1. Get what we think is the auth chain. auth_ids = self.auth.compute_auth_events(event, context) @@ -778,14 +808,24 @@ class FederationHandler(BaseHandler): # 3. Process any remote auth chain events we haven't seen. for e in result.get("missing", []): - # TODO. - pass + try: + auth_ids = [e_id for e_id, _ in e.auth_events] + auth = { + (e.type, e.state_key): e for e in result["auth_chain"] + if e.event_id in auth_ids + } + yield self._handle_new_event( + origin, e, auth_events=auth + ) + auth_events[(e.type, e.state_key)] = e + except AuthError: + pass # 4. Look at rejects and their proofs. # TODO. try: - self.auth.check(event, auth_events=context.auth_events) + self.auth.check(event, auth_events=auth_events) except AuthError: raise @@ -802,12 +842,16 @@ class FederationHandler(BaseHandler): dict """ + logger.debug("construct_auth_difference Start!") + # TODO: Make sure we are OK with local_auth or remote_auth having more # auth events in them than strictly necessary. def sort_fun(ev): return ev.depth, ev.event_id + logger.debug("construct_auth_difference after sort_fun!") + # We find the differences by starting at the "bottom" of each list # and iterating up on both lists. The lists are ordered by depth and # then event_id, we iterate up both lists until we find the event ids @@ -823,11 +867,18 @@ class FederationHandler(BaseHandler): local_iter = iter(local_list) remote_iter = iter(remote_list) - current_local = local_iter.next() - current_remote = remote_iter.next() + logger.debug("construct_auth_difference before get_next!") def get_next(it, opt=None): - return it.next() if it.has_next() else opt + try: + return it.next() + except: + return opt + + current_local = get_next(local_iter) + current_remote = get_next(remote_iter) + + logger.debug("construct_auth_difference before while") missing_remotes = [] missing_locals = [] @@ -867,6 +918,8 @@ class FederationHandler(BaseHandler): current_remote = get_next(remote_iter) continue + logger.debug("construct_auth_difference after while") + # missing locals should be sent to the server # We should find why we are missing remotes, as they will have been # rejected. @@ -886,6 +939,7 @@ class FederationHandler(BaseHandler): reason = yield self.store.get_rejection_reason(e.event_id) if reason is None: # FIXME: ERRR?! + logger.warn("Could not find reason for %s", e.event_id) raise RuntimeError("") reason_map[e.event_id] = reason @@ -899,7 +953,10 @@ class FederationHandler(BaseHandler): # TODO: Get proof. pass + logger.debug("construct_auth_difference returning") + defer.returnValue({ + "auth_chain": local_auth, "rejects": { e.event_id: { "reason": reason_map[e.event_id], |