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-rw-r--r--synapse/handlers/room_member.py32
1 files changed, 19 insertions, 13 deletions
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index d1199a0644..e89b7441ad 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -38,6 +38,7 @@ from synapse.event_auth import get_named_level, get_power_level_event
 from synapse.events import EventBase
 from synapse.events.snapshot import EventContext
 from synapse.handlers.profile import MAX_AVATAR_URL_LEN, MAX_DISPLAYNAME_LEN
+from synapse.module_api import NOT_SPAM
 from synapse.storage.state import StateFilter
 from synapse.types import (
     JsonDict,
@@ -683,7 +684,7 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
             if target_id == self._server_notices_mxid:
                 raise SynapseError(HTTPStatus.FORBIDDEN, "Cannot invite this user")
 
-            block_invite = False
+            block_invite_code = None
 
             if (
                 self._server_notices_mxid is not None
@@ -701,16 +702,19 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
                         "Blocking invite: user is not admin and non-admin "
                         "invites disabled"
                     )
-                    block_invite = True
+                    block_invite_code = Codes.FORBIDDEN
 
-                if not await self.spam_checker.user_may_invite(
+                spam_check = await self.spam_checker.user_may_invite(
                     requester.user.to_string(), target_id, room_id
-                ):
+                )
+                if spam_check != NOT_SPAM:
                     logger.info("Blocking invite due to spam checker")
-                    block_invite = True
+                    block_invite_code = spam_check
 
-            if block_invite:
-                raise SynapseError(403, "Invites have been disabled on this server")
+            if block_invite_code is not None:
+                raise SynapseError(
+                    403, "Invites have been disabled on this server", block_invite_code
+                )
 
         # An empty prev_events list is allowed as long as the auth_event_ids are present
         if prev_event_ids is not None:
@@ -818,11 +822,12 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
                 # We assume that if the spam checker allowed the user to create
                 # a room then they're allowed to join it.
                 and not new_room
-                and not await self.spam_checker.user_may_join_room(
+            ):
+                spam_check = await self.spam_checker.user_may_join_room(
                     target.to_string(), room_id, is_invited=inviter is not None
                 )
-            ):
-                raise SynapseError(403, "Not allowed to join this room")
+                if spam_check != NOT_SPAM:
+                    raise SynapseError(403, "Not allowed to join this room", spam_check)
 
             # Check if a remote join should be performed.
             remote_join, remote_room_hosts = await self._should_perform_remote_join(
@@ -1369,13 +1374,14 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
             )
         else:
             # Check if the spamchecker(s) allow this invite to go through.
-            if not await self.spam_checker.user_may_send_3pid_invite(
+            spam_check = await self.spam_checker.user_may_send_3pid_invite(
                 inviter_userid=requester.user.to_string(),
                 medium=medium,
                 address=address,
                 room_id=room_id,
-            ):
-                raise SynapseError(403, "Cannot send threepid invite")
+            )
+            if spam_check != NOT_SPAM:
+                raise SynapseError(403, "Cannot send threepid invite", spam_check)
 
             stream_id = await self._make_and_store_3pid_invite(
                 requester,