Merge pull request #615 from matrix-org/rav/SYN-642
Handle rejections of invites from local users locallypull/622/merge
commit
fa6d6bbceb
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@ -199,8 +199,7 @@ class BaseHandler(object):
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# events in the room, because we don't know enough about the graph
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# fragment we received to treat it like a graph, so the above returned
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# no relevant events. It may have returned some events (if we have
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# joined and left the room), but not useful ones, like the invite. So we
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# forcibly set our context to the invite we received over federation.
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# joined and left the room), but not useful ones, like the invite.
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if (
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not self.is_host_in_room(context.current_state) and
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builder.type == EventTypes.Member
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@ -208,7 +207,27 @@ class BaseHandler(object):
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prev_member_event = yield self.store.get_room_member(
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builder.sender, builder.room_id
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)
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if prev_member_event:
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# The prev_member_event may already be in context.current_state,
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# despite us not being present in the room; in particular, if
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# inviting user, and all other local users, have already left.
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#
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# In that case, we have all the information we need, and we don't
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# want to drop "context" - not least because we may need to handle
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# the invite locally, which will require us to have the whole
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# context (not just prev_member_event) to auth it.
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#
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context_event_ids = (
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e.event_id for e in context.current_state.values()
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)
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if (
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prev_member_event and
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prev_member_event.event_id not in context_event_ids
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):
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# The prev_member_event is missing from context, so it must
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# have arrived over federation and is an outlier. We forcibly
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# set our context to the invite we received over federation
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builder.prev_events = (
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prev_member_event.event_id,
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prev_member_event.prev_events
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@ -500,6 +500,8 @@ class RoomMemberHandler(BaseHandler):
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Raises:
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SynapseError if there was a problem changing the membership.
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"""
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remote_room_hosts = remote_room_hosts or []
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target_user = UserID.from_string(event.state_key)
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room_id = event.room_id
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@ -534,8 +536,24 @@ class RoomMemberHandler(BaseHandler):
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action = "remote_join"
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elif event.membership == Membership.LEAVE:
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is_host_in_room = self.is_host_in_room(context.current_state)
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if not is_host_in_room:
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action = "remote_reject"
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# perhaps we've been invited
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inviter = self.get_inviter(target_user.to_string(), context.current_state)
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if not inviter:
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raise SynapseError(404, "Not a known room")
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if self.hs.is_mine(inviter):
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# the inviter was on our server, but has now left. Carry on
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# with the normal rejection codepath.
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#
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# This is a bit of a hack, because the room might still be
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# active on other servers.
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pass
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else:
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# send the rejection to the inviter's HS.
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remote_room_hosts = remote_room_hosts + [inviter.domain]
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action = "remote_reject"
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federation_handler = self.hs.get_handlers().federation_handler
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@ -554,11 +572,8 @@ class RoomMemberHandler(BaseHandler):
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event.content,
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)
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elif action == "remote_reject":
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inviter = self.get_inviter(target_user.to_string(), context.current_state)
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if not inviter:
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raise SynapseError(404, "No known servers")
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yield federation_handler.do_remotely_reject_invite(
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[inviter.domain],
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remote_room_hosts,
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room_id,
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event.user_id
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)
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