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https://git.anonymousland.org/anonymousland/synapse.git
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Enforce compatibility when processing make_join requests
Reject make_join requests from servers which do not support the room version. Also include the room version in the response.
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parent
0ca459ea33
commit
0d63d93ca8
@ -58,6 +58,7 @@ class Codes(object):
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CANNOT_LEAVE_SERVER_NOTICE_ROOM = "M_CANNOT_LEAVE_SERVER_NOTICE_ROOM"
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MAU_LIMIT_EXCEEDED = "M_MAU_LIMIT_EXCEEDED"
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UNSUPPORTED_ROOM_VERSION = "M_UNSUPPORTED_ROOM_VERSION"
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INCOMPATIBLE_ROOM_VERSION = "M_INCOMPATIBLE_ROOM_VERSION"
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class CodeMessageException(RuntimeError):
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@ -287,6 +288,27 @@ class LimitExceededError(SynapseError):
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)
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class IncompatibleRoomVersionError(SynapseError):
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"""A server is trying to join a room whose version it does not support."""
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def __init__(self, room_version):
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super(IncompatibleRoomVersionError, self).__init__(
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code=400,
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msg="Your homeserver does not support the features required to "
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"join this room",
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errcode=Codes.INCOMPATIBLE_ROOM_VERSION,
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)
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self._room_version = room_version
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def error_dict(self):
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return cs_error(
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self.msg,
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self.errcode,
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room_version=self._room_version,
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)
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def cs_error(msg, code=Codes.UNKNOWN, **kwargs):
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""" Utility method for constructing an error response for client-server
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interactions.
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@ -27,7 +27,13 @@ from twisted.internet.abstract import isIPAddress
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from twisted.python import failure
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from synapse.api.constants import EventTypes
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from synapse.api.errors import AuthError, FederationError, NotFoundError, SynapseError
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from synapse.api.errors import (
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AuthError,
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FederationError,
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IncompatibleRoomVersionError,
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NotFoundError,
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SynapseError,
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)
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from synapse.crypto.event_signing import compute_event_signature
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from synapse.federation.federation_base import FederationBase, event_from_pdu_json
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from synapse.federation.persistence import TransactionActions
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@ -323,12 +329,21 @@ class FederationServer(FederationBase):
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defer.returnValue((200, resp))
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@defer.inlineCallbacks
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def on_make_join_request(self, origin, room_id, user_id):
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def on_make_join_request(self, origin, room_id, user_id, supported_versions):
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origin_host, _ = parse_server_name(origin)
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yield self.check_server_matches_acl(origin_host, room_id)
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room_version = yield self.store.get_room_version(room_id)
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if room_version not in supported_versions:
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logger.warn("Room version %s not in %s", room_version, supported_versions)
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raise IncompatibleRoomVersionError(room_version=room_version)
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pdu = yield self.handler.on_make_join_request(room_id, user_id)
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time_now = self._clock.time_msec()
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defer.returnValue({"event": pdu.get_pdu_json(time_now)})
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defer.returnValue({
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"event": pdu.get_pdu_json(time_now),
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"room_version": room_version,
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})
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@defer.inlineCallbacks
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def on_invite_request(self, origin, content):
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@ -431,9 +431,31 @@ class FederationMakeJoinServlet(BaseFederationServlet):
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PATH = "/make_join/(?P<context>[^/]*)/(?P<user_id>[^/]*)"
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@defer.inlineCallbacks
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def on_GET(self, origin, content, query, context, user_id):
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def on_GET(self, origin, _content, query, context, user_id):
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"""
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Args:
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origin (unicode): The authenticated server_name of the calling server
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_content (None): (GETs don't have bodies)
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query (dict[bytes, list[bytes]]): Query params from the request.
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**kwargs (dict[unicode, unicode]): the dict mapping keys to path
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components as specified in the path match regexp.
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Returns:
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Deferred[(int, object)|None]: either (response code, response object) to
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return a JSON response, or None if the request has already been handled.
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"""
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versions = query.get(b'ver')
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if versions is not None:
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supported_versions = [v.decode("utf-8") for v in versions]
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else:
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supported_versions = ["1"]
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content = yield self.handler.on_make_join_request(
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origin, context, user_id,
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supported_versions=supported_versions,
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)
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defer.returnValue((200, content))
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