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backends: Make uniform checks on remote desktop input dbus methods

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They all checked that the remote session service talked with the
correct peer, and some of them did check that there is an associated
screencast session.

Add a new check for the session being started (as it's state is
decoupled with screencast session availability) and move all checks
to a function that is called from all input-oriented DBus methods.

Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1254

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1258
This commit is contained in:
Carlos Garnacho 2020-05-16 10:46:57 +02:00 committed by Carlos Garnacho
parent 283cccbe9f
commit c8837a8de5
1 changed files with 51 additions and 94 deletions
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125
src/backends/meta-remote-desktop-session.c
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@ -253,6 +253,37 @@ check_permission (MetaRemoteDesktopSession *session,
g_dbus_method_invocation_get_sender (invocation)) == 0;
}
static gboolean
meta_remote_desktop_session_check_can_notify (MetaRemoteDesktopSession *session,
GDBusMethodInvocation *invocation)
{
if (!session->started)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_FAILED,
"Session not started");
return FALSE;
}
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
return FALSE;
}
if (!session->screen_cast_session)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_FAILED,
"No screen cast active");
return FALSE;
}
return TRUE;
}
static gboolean
handle_start (MetaDBusRemoteDesktopSession *skeleton,
GDBusMethodInvocation *invocation)
@ -332,13 +363,8 @@ handle_notify_keyboard_keycode (MetaDBusRemoteDesktopSession *skeleton,
MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (skeleton);
ClutterKeyState state;
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
if (pressed)
state = CLUTTER_KEY_STATE_PRESSED;
@ -364,13 +390,8 @@ handle_notify_keyboard_keysym (MetaDBusRemoteDesktopSession *skeleton,
MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (skeleton);
ClutterKeyState state;
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
if (pressed)
state = CLUTTER_KEY_STATE_PRESSED;
@ -418,13 +439,8 @@ handle_notify_pointer_button (MetaDBusRemoteDesktopSession *skeleton,
uint32_t button;
ClutterButtonState state;
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
button = translate_to_clutter_button (button_code);
@ -454,13 +470,8 @@ handle_notify_pointer_axis (MetaDBusRemoteDesktopSession *skeleton,
MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (skeleton);
ClutterScrollFinishFlags finish_flags = CLUTTER_SCROLL_FINISHED_NONE;
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
if (flags & META_REMOTE_DESKTOP_NOTIFY_AXIS_FLAGS_FINISH)
{
@ -507,13 +518,8 @@ handle_notify_pointer_axis_discrete (MetaDBusRemoteDesktopSession *skeleton,
ClutterScrollDirection direction;
int step_count;
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
if (axis > 1)
{
@ -558,13 +564,8 @@ handle_notify_pointer_motion_relative (MetaDBusRemoteDesktopSession *skeleton,
{
MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (skeleton);
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
clutter_virtual_input_device_notify_relative_motion (session->virtual_pointer,
CLUTTER_CURRENT_TIME,
@ -587,21 +588,8 @@ handle_notify_pointer_motion_absolute (MetaDBusRemoteDesktopSession *skeleton,
MetaScreenCastStream *stream;
double abs_x, abs_y;
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
if (!session->screen_cast_session)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_FAILED,
"No screen cast active");
return TRUE;
}
stream = meta_screen_cast_session_get_stream (session->screen_cast_session,
stream_path);
@ -637,21 +625,8 @@ handle_notify_touch_down (MetaDBusRemoteDesktopSession *skeleton,
MetaScreenCastStream *stream;
double abs_x, abs_y;
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
if (!session->screen_cast_session)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_FAILED,
"No screen cast active");
return TRUE;
}
stream = meta_screen_cast_session_get_stream (session->screen_cast_session,
stream_path);
@ -688,21 +663,8 @@ handle_notify_touch_motion (MetaDBusRemoteDesktopSession *skeleton,
MetaScreenCastStream *stream;
double abs_x, abs_y;
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
if (!session->screen_cast_session)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_FAILED,
"No screen cast active");
return TRUE;
}
stream = meta_screen_cast_session_get_stream (session->screen_cast_session,
stream_path);
@ -734,13 +696,8 @@ handle_notify_touch_up (MetaDBusRemoteDesktopSession *skeleton,
{
MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (skeleton);
if (!check_permission (session, invocation))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"Permission denied");
if (!meta_remote_desktop_session_check_can_notify (session, invocation))
return TRUE;
}
clutter_virtual_input_device_notify_touch_up (session->virtual_touchscreen,
CLUTTER_CURRENT_TIME,