diff options
Diffstat (limited to 'synapse/federation/federation_client.py')
| -rw-r--r-- | synapse/federation/federation_client.py | 200 |
1 files changed, 159 insertions, 41 deletions
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index d05ed91d64..58e04d81ab 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -25,14 +25,20 @@ from prometheus_client import Counter from twisted.internet import defer -from synapse.api.constants import KNOWN_ROOM_VERSIONS, EventTypes, Membership +from synapse.api.constants import ( + KNOWN_ROOM_VERSIONS, + EventTypes, + Membership, + RoomVersions, +) from synapse.api.errors import ( CodeMessageException, + Codes, FederationDeniedError, HttpResponseException, SynapseError, ) -from synapse.events import builder +from synapse.events import builder, room_version_to_event_format from synapse.federation.federation_base import FederationBase, event_from_pdu_json from synapse.util import logcontext, unwrapFirstError from synapse.util.caches.expiringcache import ExpiringCache @@ -66,6 +72,9 @@ class FederationClient(FederationBase): self.state = hs.get_state_handler() self.transport_layer = hs.get_federation_transport_client() + self.hostname = hs.hostname + self.signing_key = hs.config.signing_key[0] + self._get_pdu_cache = ExpiringCache( cache_name="get_pdu_cache", clock=self._clock, @@ -162,13 +171,13 @@ class FederationClient(FederationBase): @defer.inlineCallbacks @log_function - def backfill(self, dest, context, limit, extremities): + def backfill(self, dest, room_id, limit, extremities): """Requests some more historic PDUs for the given context from the given destination server. Args: dest (str): The remote home server to ask. - context (str): The context to backfill. + room_id (str): The room_id to backfill. limit (int): The maximum number of PDUs to return. extremities (list): List of PDU id and origins of the first pdus we have seen from the context @@ -183,18 +192,21 @@ class FederationClient(FederationBase): return transaction_data = yield self.transport_layer.backfill( - dest, context, extremities, limit) + dest, room_id, extremities, limit) logger.debug("backfill transaction_data=%s", repr(transaction_data)) + room_version = yield self.store.get_room_version(room_id) + format_ver = room_version_to_event_format(room_version) + pdus = [ - event_from_pdu_json(p, outlier=False) + event_from_pdu_json(p, format_ver, outlier=False) for p in transaction_data["pdus"] ] # FIXME: We should handle signature failures more gracefully. pdus[:] = yield logcontext.make_deferred_yieldable(defer.gatherResults( - self._check_sigs_and_hashes(pdus), + self._check_sigs_and_hashes(room_version, pdus), consumeErrors=True, ).addErrback(unwrapFirstError)) @@ -202,7 +214,8 @@ class FederationClient(FederationBase): @defer.inlineCallbacks @log_function - def get_pdu(self, destinations, event_id, outlier=False, timeout=None): + def get_pdu(self, destinations, event_id, room_version, outlier=False, + timeout=None): """Requests the PDU with given origin and ID from the remote home servers. @@ -212,6 +225,7 @@ class FederationClient(FederationBase): Args: destinations (list): Which home servers to query event_id (str): event to fetch + room_version (str): version of the room outlier (bool): Indicates whether the PDU is an `outlier`, i.e. if it's from an arbitary point in the context as opposed to part of the current block of PDUs. Defaults to `False` @@ -230,6 +244,8 @@ class FederationClient(FederationBase): pdu_attempts = self.pdu_destination_tried.setdefault(event_id, {}) + format_ver = room_version_to_event_format(room_version) + signed_pdu = None for destination in destinations: now = self._clock.time_msec() @@ -245,7 +261,7 @@ class FederationClient(FederationBase): logger.debug("transaction_data %r", transaction_data) pdu_list = [ - event_from_pdu_json(p, outlier=outlier) + event_from_pdu_json(p, format_ver, outlier=outlier) for p in transaction_data["pdus"] ] @@ -253,7 +269,7 @@ class FederationClient(FederationBase): pdu = pdu_list[0] # Check signatures are correct. - signed_pdu = yield self._check_sigs_and_hash(pdu) + signed_pdu = yield self._check_sigs_and_hash(room_version, pdu) break @@ -339,12 +355,16 @@ class FederationClient(FederationBase): destination, room_id, event_id=event_id, ) + room_version = yield self.store.get_room_version(room_id) + format_ver = room_version_to_event_format(room_version) + pdus = [ - event_from_pdu_json(p, outlier=True) for p in result["pdus"] + event_from_pdu_json(p, format_ver, outlier=True) + for p in result["pdus"] ] auth_chain = [ - event_from_pdu_json(p, outlier=True) + event_from_pdu_json(p, format_ver, outlier=True) for p in result.get("auth_chain", []) ] @@ -355,7 +375,8 @@ class FederationClient(FederationBase): signed_pdus = yield self._check_sigs_and_hash_and_fetch( destination, [p for p in pdus if p.event_id not in seen_events], - outlier=True + outlier=True, + room_version=room_version, ) signed_pdus.extend( seen_events[p.event_id] for p in pdus if p.event_id in seen_events @@ -364,7 +385,8 @@ class FederationClient(FederationBase): signed_auth = yield self._check_sigs_and_hash_and_fetch( destination, [p for p in auth_chain if p.event_id not in seen_events], - outlier=True + outlier=True, + room_version=room_version, ) signed_auth.extend( seen_events[p.event_id] for p in auth_chain if p.event_id in seen_events @@ -411,6 +433,8 @@ class FederationClient(FederationBase): random.shuffle(srvs) return srvs + room_version = yield self.store.get_room_version(room_id) + batch_size = 20 missing_events = list(missing_events) for i in range(0, len(missing_events), batch_size): @@ -421,6 +445,7 @@ class FederationClient(FederationBase): self.get_pdu, destinations=random_server_list(), event_id=e_id, + room_version=room_version, ) for e_id in batch ] @@ -445,13 +470,17 @@ class FederationClient(FederationBase): destination, room_id, event_id, ) + room_version = yield self.store.get_room_version(room_id) + format_ver = room_version_to_event_format(room_version) + auth_chain = [ - event_from_pdu_json(p, outlier=True) + event_from_pdu_json(p, format_ver, outlier=True) for p in res["auth_chain"] ] signed_auth = yield self._check_sigs_and_hash_and_fetch( - destination, auth_chain, outlier=True + destination, auth_chain, + outlier=True, room_version=room_version, ) signed_auth.sort(key=lambda e: e.depth) @@ -522,6 +551,8 @@ class FederationClient(FederationBase): Does so by asking one of the already participating servers to create an event with proper context. + Returns a fully signed and hashed event. + Note that this does not append any events to any graphs. Args: @@ -536,8 +567,10 @@ class FederationClient(FederationBase): params (dict[str, str|Iterable[str]]): Query parameters to include in the request. Return: - Deferred: resolves to a tuple of (origin (str), event (object)) - where origin is the remote homeserver which generated the event. + Deferred[tuple[str, FrozenEvent, int]]: resolves to a tuple of + `(origin, event, event_format)` where origin is the remote + homeserver which generated the event, and event_format is one of + `synapse.api.constants.EventFormatVersions`. Fails with a ``SynapseError`` if the chosen remote server returns a 300/400 code. @@ -557,6 +590,11 @@ class FederationClient(FederationBase): destination, room_id, user_id, membership, params, ) + # Note: If not supplied, the room version may be either v1 or v2, + # however either way the event format version will be v1. + room_version = ret.get("room_version", RoomVersions.V1) + event_format = room_version_to_event_format(room_version) + pdu_dict = ret.get("event", None) if not isinstance(pdu_dict, dict): raise InvalidResponseError("Bad 'event' field in response") @@ -571,17 +609,20 @@ class FederationClient(FederationBase): if "prev_state" not in pdu_dict: pdu_dict["prev_state"] = [] - ev = builder.EventBuilder(pdu_dict) + ev = builder.create_local_event_from_event_dict( + self._clock, self.hostname, self.signing_key, + format_version=event_format, event_dict=pdu_dict, + ) defer.returnValue( - (destination, ev) + (destination, ev, event_format) ) return self._try_destination_list( "make_" + membership, destinations, send_request, ) - def send_join(self, destinations, pdu): + def send_join(self, destinations, pdu, event_format_version): """Sends a join event to one of a list of homeservers. Doing so will cause the remote server to add the event to the graph, @@ -591,6 +632,7 @@ class FederationClient(FederationBase): destinations (str): Candidate homeservers which are probably participating in the room. pdu (BaseEvent): event to be sent + event_format_version (int): The event format version Return: Deferred: resolves to a dict with members ``origin`` (a string @@ -636,12 +678,12 @@ class FederationClient(FederationBase): logger.debug("Got content: %s", content) state = [ - event_from_pdu_json(p, outlier=True) + event_from_pdu_json(p, event_format_version, outlier=True) for p in content.get("state", []) ] auth_chain = [ - event_from_pdu_json(p, outlier=True) + event_from_pdu_json(p, event_format_version, outlier=True) for p in content.get("auth_chain", []) ] @@ -650,9 +692,21 @@ class FederationClient(FederationBase): for p in itertools.chain(state, auth_chain) } + room_version = None + for e in state: + if (e.type, e.state_key) == (EventTypes.Create, ""): + room_version = e.content.get("room_version", RoomVersions.V1) + break + + if room_version is None: + # If the state doesn't have a create event then the room is + # invalid, and it would fail auth checks anyway. + raise SynapseError(400, "No create event in state") + valid_pdus = yield self._check_sigs_and_hash_and_fetch( destination, list(pdus.values()), outlier=True, + room_version=room_version, ) valid_pdus_map = { @@ -690,32 +744,90 @@ class FederationClient(FederationBase): @defer.inlineCallbacks def send_invite(self, destination, room_id, event_id, pdu): - time_now = self._clock.time_msec() - try: - code, content = yield self.transport_layer.send_invite( - destination=destination, - room_id=room_id, - event_id=event_id, - content=pdu.get_pdu_json(time_now), - ) - except HttpResponseException as e: - if e.code == 403: - raise e.to_synapse_error() - raise + room_version = yield self.store.get_room_version(room_id) + + content = yield self._do_send_invite(destination, pdu, room_version) pdu_dict = content["event"] logger.debug("Got response to send_invite: %s", pdu_dict) - pdu = event_from_pdu_json(pdu_dict) + room_version = yield self.store.get_room_version(room_id) + format_ver = room_version_to_event_format(room_version) + + pdu = event_from_pdu_json(pdu_dict, format_ver) # Check signatures are correct. - pdu = yield self._check_sigs_and_hash(pdu) + pdu = yield self._check_sigs_and_hash(room_version, pdu) # FIXME: We should handle signature failures more gracefully. defer.returnValue(pdu) + @defer.inlineCallbacks + def _do_send_invite(self, destination, pdu, room_version): + """Actually sends the invite, first trying v2 API and falling back to + v1 API if necessary. + + Args: + destination (str): Target server + pdu (FrozenEvent) + room_version (str) + + Returns: + dict: The event as a dict as returned by the remote server + """ + time_now = self._clock.time_msec() + + try: + content = yield self.transport_layer.send_invite_v2( + destination=destination, + room_id=pdu.room_id, + event_id=pdu.event_id, + content={ + "event": pdu.get_pdu_json(time_now), + "room_version": room_version, + "invite_room_state": pdu.unsigned.get("invite_room_state", []), + }, + ) + defer.returnValue(content) + except HttpResponseException as e: + if e.code in [400, 404]: + err = e.to_synapse_error() + + # If we receive an error response that isn't a generic error, we + # assume that the remote understands the v2 invite API and this + # is a legitimate error. + if err.errcode != Codes.UNKNOWN: + raise err + + # Otherwise, we assume that the remote server doesn't understand + # the v2 invite API. + + if room_version in (RoomVersions.V1, RoomVersions.V2): + pass # We'll fall through + else: + raise SynapseError( + 400, + "User's homeserver does not support this room version", + Codes.UNSUPPORTED_ROOM_VERSION, + ) + elif e.code == 403: + raise e.to_synapse_error() + else: + raise + + # Didn't work, try v1 API. + # Note the v1 API returns a tuple of `(200, content)` + + _, content = yield self.transport_layer.send_invite_v1( + destination=destination, + room_id=pdu.room_id, + event_id=pdu.event_id, + content=pdu.get_pdu_json(time_now), + ) + defer.returnValue(content) + def send_leave(self, destinations, pdu): """Sends a leave event to one of a list of homeservers. @@ -785,13 +897,16 @@ class FederationClient(FederationBase): content=send_content, ) + room_version = yield self.store.get_room_version(room_id) + format_ver = room_version_to_event_format(room_version) + auth_chain = [ - event_from_pdu_json(e) + event_from_pdu_json(e, format_ver) for e in content["auth_chain"] ] signed_auth = yield self._check_sigs_and_hash_and_fetch( - destination, auth_chain, outlier=True + destination, auth_chain, outlier=True, room_version=room_version, ) signed_auth.sort(key=lambda e: e.depth) @@ -833,13 +948,16 @@ class FederationClient(FederationBase): timeout=timeout, ) + room_version = yield self.store.get_room_version(room_id) + format_ver = room_version_to_event_format(room_version) + events = [ - event_from_pdu_json(e) + event_from_pdu_json(e, format_ver) for e in content.get("events", []) ] signed_events = yield self._check_sigs_and_hash_and_fetch( - destination, events, outlier=False + destination, events, outlier=False, room_version=room_version, ) except HttpResponseException as e: if not e.code == 400: |