Check virtual host before running the command

src/ejabberd_admin.erl

@@ -498,27 +498,42 @@ update_module(ModuleNameString) ->
 %%%
 
 register(User, Host, Password) ->
-    case ejabberd_auth:try_register(User, Host, Password) of
-	ok ->
-	    {ok, io_lib:format("User ~s@~s successfully registered", [User, Host])};
-	{error, exists} ->
-	    Msg = io_lib:format("User ~s@~s already registered", [User, Host]),
-	    {error, conflict, 10090, Msg};
-	{error, Reason} ->
-	    String = io_lib:format("Can't register user ~s@~s at node ~p: ~s",
-				   [User, Host, node(),
-				    mod_register:format_error(Reason)]),
-	    {error, cannot_register, 10001, String}
+    case is_my_host(Host) of
+	true ->
+	    case ejabberd_auth:try_register(User, Host, Password) of
+		ok ->
+		    {ok, io_lib:format("User ~s@~s successfully registered", [User, Host])};
+		{error, exists} ->
+		    Msg = io_lib:format("User ~s@~s already registered", [User, Host]),
+		    {error, conflict, 10090, Msg};
+		{error, Reason} ->
+		    String = io_lib:format("Can't register user ~s@~s at node ~p: ~s",
+					   [User, Host, node(),
+					    mod_register:format_error(Reason)]),
+		    {error, cannot_register, 10001, String}
+	    end;
+	false ->
+	    {error, cannot_register, 10001, "Unknown virtual host"}
     end.
 
 unregister(User, Host) ->
-    ejabberd_auth:remove_user(User, Host),
-    {ok, ""}.
+    case is_my_host(Host) of
+	true ->
+	    ejabberd_auth:remove_user(User, Host),
+	    {ok, ""};
+	false ->
+	    {error, "Unknown virtual host"}
+    end.
 
 registered_users(Host) ->
-    Users = ejabberd_auth:get_users(Host),
-    SUsers = lists:sort(Users),
-    lists:map(fun({U, _S}) -> U end, SUsers).
+    case is_my_host(Host) of
+	true ->
+	    Users = ejabberd_auth:get_users(Host),
+	    SUsers = lists:sort(Users),
+	    lists:map(fun({U, _S}) -> U end, SUsers);
+	false ->
+	    {error, "Unknown virtual host"}
+    end.
 
 registered_vhosts() ->
     ejabberd_option:hosts().
@@ -812,3 +827,9 @@ mnesia_change_nodename(FromString, ToString, Source, Target) ->
 clear_cache() ->
     Nodes = ejabberd_cluster:get_nodes(),
     lists:foreach(fun(T) -> ets_cache:clear(T, Nodes) end, ets_cache:all()).
+
+-spec is_my_host(binary()) -> boolean().
+is_my_host(Host) ->
+    try ejabberd_router:is_my_host(Host)
+    catch _:{invalid_domain, _} -> false
+    end.

src/ejabberd_ctl.erl

@@ -331,8 +331,10 @@ try_call_command(Args, Auth, AccessCommands, Version) ->
 	throw:Error ->
 	    {io_lib:format("~p", [Error]), ?STATUS_ERROR};
 	?EX_RULE(A, Why, Stack) ->
-	    {io_lib:format("Problem '~p ~p' occurred executing the command.~nStacktrace: ~p",
-			   [A, Why, ?EX_STACK(Stack)]), ?STATUS_ERROR}
+	    StackTrace = ?EX_STACK(Stack),
+	    {io_lib:format("Unhandled exception occurred executing the command:~n** ~s",
+			   [misc:format_exception(2, A, Why, StackTrace)]),
+	     ?STATUS_ERROR}
     end.
 
 %% @spec (Args::[string()], Auth, AccessCommands) -> string() | integer() | {string(), integer()} | {error, ErrorType}