fix(mgmt_client): `nl` not allowed for shared-sub

apps/emqx/src/emqx_topic.erl

@@ -283,6 +283,10 @@ parse(#share{topic = Topic = <<?QUEUE, "/", _/binary>>}, _Options) ->
     error({invalid_topic_filter, Topic});
 parse(#share{topic = Topic = <<?SHARE, "/", _/binary>>}, _Options) ->
     error({invalid_topic_filter, Topic});
+parse(#share{} = T, #{nl := 1} = _Options) ->
+    %% Protocol Error and Should Disconnect
+    %% MQTT-5.0 [MQTT-3.8.3-4] and [MQTT-4.13.1-1]
+    error({invalid_subopts_nl, maybe_format_share(T)});
 parse(<<?QUEUE, "/", Topic/binary>>, Options) ->
     parse(#share{group = <<?QUEUE>>, topic = Topic}, Options);
 parse(TopicFilter = <<?SHARE, "/", Rest/binary>>, Options) ->

apps/emqx_management/src/emqx_mgmt_api_clients.erl

@@ -758,6 +758,12 @@ subscribe(#{clientid := ClientID, topic := Topic} = Sub) ->
     case do_subscribe(ClientID, Topic, Opts) of
         {error, channel_not_found} ->
             {404, ?CLIENTID_NOT_FOUND};
+        {error, invalid_subopts_nl} ->
+            {400, #{
+                code => <<"INVALID_PARAMETER">>,
+                message =>
+                    <<"Invalid Subscribe options: `no_local` not allowed for shared-sub. See [MQTT-3.8.3-4]">>
+            }};
         {error, Reason} ->
             Message = list_to_binary(io_lib:format("~p", [Reason])),
             {500, #{code => <<"UNKNOWN_ERROR">>, message => Message}};
@@ -804,7 +810,8 @@ unsubscribe_batch(#{clientid := ClientID, topics := Topics}) ->
 %% internal function
 
 do_subscribe(ClientID, Topic0, Options) ->
-    {Topic, Opts} = emqx_topic:parse(Topic0, Options),
+    try emqx_topic:parse(Topic0, Options) of
+        {Topic, Opts} ->
             TopicTable = [{Topic, Opts}],
             case emqx_mgmt:subscribe(ClientID, TopicTable) of
                 {error, Reason} ->
@@ -816,6 +823,12 @@ do_subscribe(ClientID, Topic0, Options) ->
                         false ->
                             {error, unknow_error}
                     end
+            end
+    catch
+        error:{invalid_subopts_nl, _} ->
+            {error, invalid_subopts_nl};
+        _:Reason ->
+            {error, Reason}
     end.
 
 -spec do_unsubscribe(emqx_types:clientid(), emqx_types:topic()) ->