/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ /* * Copyright (C) 2015-2017 Red Hat Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA. * */ #include "config.h" #include "backends/meta-remote-desktop-session.h" #include #include #include "backends/meta-dbus-session-watcher.h" #include "backends/meta-screen-cast-session.h" #include "backends/native/meta-backend-native.h" #include "backends/x11/meta-backend-x11.h" #include "cogl/cogl.h" #include "meta/meta-backend.h" #include "meta/errors.h" #include "meta-dbus-remote-desktop.h" #define META_REMOTE_DESKTOP_SESSION_DBUS_PATH "/org/gnome/Mutter/RemoteDesktop/Session" struct _MetaRemoteDesktopSession { MetaDBusRemoteDesktopSessionSkeleton parent; char *peer_name; char *session_id; char *object_path; MetaScreenCastSession *screen_cast_session; gulong screen_cast_session_closed_handler_id; ClutterVirtualInputDevice *virtual_pointer; ClutterVirtualInputDevice *virtual_keyboard; }; static void meta_remote_desktop_session_init_iface (MetaDBusRemoteDesktopSessionIface *iface); static void meta_dbus_session_init_iface (MetaDbusSessionInterface *iface); G_DEFINE_TYPE_WITH_CODE (MetaRemoteDesktopSession, meta_remote_desktop_session, META_DBUS_TYPE_REMOTE_DESKTOP_SESSION_SKELETON, G_IMPLEMENT_INTERFACE (META_DBUS_TYPE_REMOTE_DESKTOP_SESSION, meta_remote_desktop_session_init_iface) G_IMPLEMENT_INTERFACE (META_TYPE_DBUS_SESSION, meta_dbus_session_init_iface)) static gboolean meta_remote_desktop_session_is_running (MetaRemoteDesktopSession *session) { return !!session->virtual_pointer; } static gboolean meta_remote_desktop_session_start (MetaRemoteDesktopSession *session, GError **error) { ClutterDeviceManager *device_manager = clutter_device_manager_get_default (); g_assert (!session->virtual_pointer && !session->virtual_keyboard); if (session->screen_cast_session) { if (!meta_screen_cast_session_start (session->screen_cast_session, error)) return FALSE; } session->virtual_pointer = clutter_device_manager_create_virtual_device (device_manager, CLUTTER_POINTER_DEVICE); session->virtual_keyboard = clutter_device_manager_create_virtual_device (device_manager, CLUTTER_KEYBOARD_DEVICE); return TRUE; } void meta_remote_desktop_session_close (MetaRemoteDesktopSession *session) { MetaDBusRemoteDesktopSession *skeleton = META_DBUS_REMOTE_DESKTOP_SESSION (session); if (session->screen_cast_session) { g_signal_handler_disconnect (session->screen_cast_session, session->screen_cast_session_closed_handler_id); meta_screen_cast_session_close (session->screen_cast_session); session->screen_cast_session = NULL; } g_clear_object (&session->virtual_pointer); g_clear_object (&session->virtual_keyboard); meta_dbus_session_notify_closed (META_DBUS_SESSION (session)); meta_dbus_remote_desktop_session_emit_closed (skeleton); g_dbus_interface_skeleton_unexport (G_DBUS_INTERFACE_SKELETON (session)); g_object_unref (session); } char * meta_remote_desktop_session_get_object_path (MetaRemoteDesktopSession *session) { return session->object_path; } char * meta_remote_desktop_session_get_session_id (MetaRemoteDesktopSession *session) { return session->session_id; } static void on_screen_cast_session_closed (MetaScreenCastSession *screen_cast_session, MetaRemoteDesktopSession *session) { session->screen_cast_session = NULL; meta_remote_desktop_session_close (session); } gboolean meta_remote_desktop_session_register_screen_cast (MetaRemoteDesktopSession *session, MetaScreenCastSession *screen_cast_session, GError **error) { if (session->screen_cast_session) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "Remote desktop session already have an associated " "screen cast session"); return FALSE; } session->screen_cast_session = screen_cast_session; session->screen_cast_session_closed_handler_id = g_signal_connect (screen_cast_session, "session-closed", G_CALLBACK (on_screen_cast_session_closed), session); return TRUE; } MetaRemoteDesktopSession * meta_remote_desktop_session_new (MetaRemoteDesktop *remote_desktop, const char *peer_name, GError **error) { GDBusInterfaceSkeleton *interface_skeleton; MetaRemoteDesktopSession *session; GDBusConnection *connection; session = g_object_new (META_TYPE_REMOTE_DESKTOP_SESSION, NULL); session->peer_name = g_strdup (peer_name); interface_skeleton = G_DBUS_INTERFACE_SKELETON (session); connection = meta_remote_desktop_get_connection (remote_desktop); if (!g_dbus_interface_skeleton_export (interface_skeleton, connection, session->object_path, error)) { g_object_unref (session); return NULL; } return session; } static gboolean check_permission (MetaRemoteDesktopSession *session, GDBusMethodInvocation *invocation) { return g_strcmp0 (session->peer_name, g_dbus_method_invocation_get_sender (invocation)) == 0; } static gboolean handle_start (MetaDBusRemoteDesktopSession *skeleton, GDBusMethodInvocation *invocation) { MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (skeleton); GError *error = NULL; if (!check_permission (session, invocation)) { g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_ACCESS_DENIED, "Permission denied"); return TRUE; } if (!meta_remote_desktop_session_start (session, &error)) { g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Failed to start remote desktop: %s", error->message); g_error_free (error); meta_remote_desktop_session_close (session); return TRUE; } meta_dbus_remote_desktop_session_complete_start (skeleton, invocation); return TRUE; } static gboolean handle_stop (MetaDBusRemoteDesktopSession *skeleton, GDBusMethodInvocation *invocation) { 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"); return TRUE; } meta_remote_desktop_session_close (session); meta_dbus_remote_desktop_session_complete_stop (skeleton, invocation); return TRUE; } static gboolean handle_notify_keyboard_keysym (MetaDBusRemoteDesktopSession *skeleton, GDBusMethodInvocation *invocation, unsigned int keysym, gboolean pressed) { 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"); return TRUE; } if (pressed) state = CLUTTER_KEY_STATE_PRESSED; else state = CLUTTER_KEY_STATE_RELEASED; clutter_virtual_input_device_notify_keyval (session->virtual_keyboard, CLUTTER_CURRENT_TIME, keysym, state); meta_dbus_remote_desktop_session_complete_notify_keyboard_keysym (skeleton, invocation); return TRUE; } /* Translation taken from the clutter evdev backend. */ static int translate_to_clutter_button (int button) { switch (button) { case BTN_LEFT: return CLUTTER_BUTTON_PRIMARY; case BTN_RIGHT: return CLUTTER_BUTTON_SECONDARY; case BTN_MIDDLE: return CLUTTER_BUTTON_MIDDLE; default: /* * For compatibility reasons, all additional buttons go after the old * 4-7 scroll ones. */ return button - (BTN_LEFT - 1) + 4; } } static gboolean handle_notify_pointer_button (MetaDBusRemoteDesktopSession *skeleton, GDBusMethodInvocation *invocation, int button_code, gboolean pressed) { MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (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"); return TRUE; } button = translate_to_clutter_button (button_code); if (pressed) state = CLUTTER_BUTTON_STATE_PRESSED; else state = CLUTTER_BUTTON_STATE_RELEASED; clutter_virtual_input_device_notify_button (session->virtual_pointer, CLUTTER_CURRENT_TIME, button, state); meta_dbus_remote_desktop_session_complete_notify_pointer_button (skeleton, invocation); return TRUE; } static ClutterScrollDirection discrete_steps_to_scroll_direction (unsigned int axis, int steps) { if (axis == 0 && steps < 0) return CLUTTER_SCROLL_UP; if (axis == 0 && steps > 0) return CLUTTER_SCROLL_DOWN; if (axis == 1 && steps < 0) return CLUTTER_SCROLL_LEFT; if (axis == 1 && steps > 0) return CLUTTER_SCROLL_RIGHT; g_assert_not_reached (); } static gboolean handle_notify_pointer_axis_discrete (MetaDBusRemoteDesktopSession *skeleton, GDBusMethodInvocation *invocation, unsigned int axis, int steps) { MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (skeleton); ClutterScrollDirection direction; if (!check_permission (session, invocation)) { g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_ACCESS_DENIED, "Permission denied"); return TRUE; } if (axis > 1) { g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Invalid axis value"); return TRUE; } if (steps == 0) { g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Invalid axis steps value"); return TRUE; } if (steps != -1 && steps != 1) g_warning ("Multiple steps at at once not yet implemented, treating as one."); /* * We don't have the actual scroll source, but only know they should be * considered as discrete steps. The device that produces such scroll events * is the scroll wheel, so pretend that is the scroll source. */ direction = discrete_steps_to_scroll_direction (axis, steps); clutter_virtual_input_device_notify_discrete_scroll (session->virtual_pointer, CLUTTER_CURRENT_TIME, direction, CLUTTER_SCROLL_SOURCE_WHEEL); meta_dbus_remote_desktop_session_complete_notify_pointer_axis_discrete (skeleton, invocation); return TRUE; } static gboolean handle_notify_pointer_motion_absolute (MetaDBusRemoteDesktopSession *skeleton, GDBusMethodInvocation *invocation, const char *stream_path, double x, double y) { 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"); return TRUE; } clutter_virtual_input_device_notify_absolute_motion (session->virtual_pointer, CLUTTER_CURRENT_TIME, x, y); meta_dbus_remote_desktop_session_complete_notify_pointer_motion_absolute (skeleton, invocation); return TRUE; } static void meta_remote_desktop_session_init_iface (MetaDBusRemoteDesktopSessionIface *iface) { iface->handle_start = handle_start; iface->handle_stop = handle_stop; iface->handle_notify_keyboard_keysym = handle_notify_keyboard_keysym; iface->handle_notify_pointer_button = handle_notify_pointer_button; iface->handle_notify_pointer_axis_discrete = handle_notify_pointer_axis_discrete; iface->handle_notify_pointer_motion_absolute = handle_notify_pointer_motion_absolute; } static void meta_remote_desktop_session_client_vanished (MetaDbusSession *dbus_session) { meta_remote_desktop_session_close (META_REMOTE_DESKTOP_SESSION (dbus_session)); } static void meta_dbus_session_init_iface (MetaDbusSessionInterface *iface) { iface->client_vanished = meta_remote_desktop_session_client_vanished; } static void meta_remote_desktop_session_finalize (GObject *object) { MetaRemoteDesktopSession *session = META_REMOTE_DESKTOP_SESSION (object); g_assert (!meta_remote_desktop_session_is_running (session)); g_free (session->peer_name); g_free (session->session_id); g_free (session->object_path); G_OBJECT_CLASS (meta_remote_desktop_session_parent_class)->finalize (object); } static void meta_remote_desktop_session_init (MetaRemoteDesktopSession *session) { MetaDBusRemoteDesktopSession *skeleton = META_DBUS_REMOTE_DESKTOP_SESSION (session); GRand *rand; static unsigned int global_session_number = 0; rand = g_rand_new (); session->session_id = meta_generate_random_id (rand, 32); g_rand_free (rand); meta_dbus_remote_desktop_session_set_session_id (skeleton, session->session_id); session->object_path = g_strdup_printf (META_REMOTE_DESKTOP_SESSION_DBUS_PATH "/u%u", ++global_session_number); } static void meta_remote_desktop_session_class_init (MetaRemoteDesktopSessionClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->finalize = meta_remote_desktop_session_finalize; }