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-rw-r--r--plugins/rfkill/rfkill-glib.c680
1 files changed, 680 insertions, 0 deletions
diff --git a/plugins/rfkill/rfkill-glib.c b/plugins/rfkill/rfkill-glib.c
new file mode 100644
index 0000000..22309dc
--- /dev/null
+++ b/plugins/rfkill/rfkill-glib.c
@@ -0,0 +1,680 @@
+/*
+ *
+ * gnome-bluetooth - Bluetooth integration for GNOME
+ *
+ * Copyright (C) 2012 Bastien Nocera <hadess@hadess.net>
+ * Copyright © 2017 Endless Mobile, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include <glib.h>
+#include <gio/gio.h>
+#include <gio/gunixoutputstream.h>
+
+#include "rfkill-glib.h"
+#include <gudev/gudev.h>
+
+enum {
+ CHANGED,
+ LAST_SIGNAL
+};
+
+enum {
+ PROP_RFKILL_INPUT_INHIBITED = 1
+};
+
+static int signals[LAST_SIGNAL] = { 0 };
+
+struct _CcRfkillGlib {
+ GObject parent;
+
+ GUdevClient *udev;
+ gchar *device_file;
+
+ GOutputStream *stream;
+ GIOChannel *channel;
+ guint watch_id;
+
+ /* rfkill-input inhibitor */
+ gboolean noinput;
+ int noinput_fd;
+
+ /* Pending Bluetooth enablement.
+ * If (@change_all_timeout_id != 0), then (task != NULL). The converse
+ * does not necessarily hold. */
+ guint change_all_timeout_id;
+ GTask *task;
+};
+
+G_DEFINE_TYPE (CcRfkillGlib, cc_rfkill_glib, G_TYPE_OBJECT)
+
+#define CHANGE_ALL_TIMEOUT 500
+
+static const char *type_to_string (unsigned int type);
+
+static void
+cancel_current_task (CcRfkillGlib *rfkill)
+{
+ if (rfkill->task != NULL) {
+ g_cancellable_cancel (g_task_get_cancellable (rfkill->task));
+ g_clear_object (&rfkill->task);
+ }
+
+ if (rfkill->change_all_timeout_id != 0) {
+ g_source_remove (rfkill->change_all_timeout_id);
+ rfkill->change_all_timeout_id = 0;
+ }
+}
+
+/* Note that this can return %FALSE without setting @error. */
+gboolean
+cc_rfkill_glib_send_change_all_event_finish (CcRfkillGlib *rfkill,
+ GAsyncResult *res,
+ GError **error)
+{
+ g_return_val_if_fail (CC_RFKILL_IS_GLIB (rfkill), FALSE);
+ g_return_val_if_fail (g_task_is_valid (res, rfkill), FALSE);
+ g_return_val_if_fail (g_async_result_is_tagged (res, cc_rfkill_glib_send_change_all_event), FALSE);
+
+ return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+write_change_all_again_done_cb (GObject *source_object,
+ GAsyncResult *res,
+ gpointer user_data)
+{
+ g_autoptr(GTask) task = G_TASK (user_data);
+ CcRfkillGlib *rfkill = g_task_get_source_object (task);
+ g_autoptr(GError) error = NULL;
+ gssize ret;
+
+ g_debug ("Finished writing second RFKILL_OP_CHANGE_ALL event");
+
+ ret = g_output_stream_write_finish (G_OUTPUT_STREAM (source_object), res, &error);
+ if (ret < 0)
+ g_task_return_error (task, g_steal_pointer (&error));
+ else
+ g_task_return_boolean (task, ret >= 0);
+
+ /* If this @task has been cancelled, it may have been superceded. */
+ if (rfkill->task == task)
+ g_clear_object (&rfkill->task);
+}
+
+static gboolean
+write_change_all_timeout_cb (CcRfkillGlib *rfkill)
+{
+ struct rfkill_event *event;
+
+ g_assert (rfkill->task != NULL);
+
+ g_debug ("Sending second RFKILL_OP_CHANGE_ALL timed out");
+
+ event = g_task_get_task_data (rfkill->task);
+ g_task_return_new_error (rfkill->task,
+ G_IO_ERROR, G_IO_ERROR_TIMED_OUT,
+ "Enabling rfkill for %s timed out",
+ type_to_string (event->type));
+
+ g_clear_object (&rfkill->task);
+ rfkill->change_all_timeout_id = 0;
+
+ return G_SOURCE_REMOVE;
+}
+
+static void
+write_change_all_done_cb (GObject *source_object,
+ GAsyncResult *res,
+ gpointer user_data)
+{
+ g_autoptr(GTask) task = G_TASK (user_data);
+ CcRfkillGlib *rfkill = g_task_get_source_object (task);
+ g_autoptr(GError) error = NULL;
+ gssize ret;
+ struct rfkill_event *event;
+
+ g_debug ("Sending original RFKILL_OP_CHANGE_ALL event done");
+
+ event = g_task_get_task_data (task);
+ ret = g_output_stream_write_finish (G_OUTPUT_STREAM (source_object), res, &error);
+ if (ret < 0) {
+ g_task_return_error (task, g_steal_pointer (&error));
+ goto bail;
+ } else if (event->soft == 1 ||
+ event->type != RFKILL_TYPE_BLUETOOTH) {
+ g_task_return_boolean (task, ret >= 0);
+ goto bail;
+ }
+
+ g_assert (rfkill->change_all_timeout_id == 0);
+ rfkill->change_all_timeout_id = g_timeout_add (CHANGE_ALL_TIMEOUT,
+ (GSourceFunc) write_change_all_timeout_cb,
+ rfkill);
+
+ return;
+
+bail:
+ /* If this @task has been cancelled, it may have been superceded. */
+ if (rfkill->task == task)
+ g_clear_object (&rfkill->task);
+}
+
+void
+cc_rfkill_glib_send_change_all_event (CcRfkillGlib *rfkill,
+ guint rfkill_type,
+ gboolean enable,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data)
+{
+ g_autoptr(GTask) task = NULL;
+ struct rfkill_event *event;
+ g_autoptr(GCancellable) task_cancellable = NULL;
+
+ g_return_if_fail (CC_RFKILL_IS_GLIB (rfkill));
+ g_return_if_fail (rfkill->stream);
+
+ task_cancellable = g_cancellable_new ();
+ g_signal_connect_object (cancellable, "cancelled",
+ (GCallback) g_cancellable_cancel,
+ task_cancellable,
+ G_CONNECT_SWAPPED);
+ /* Now check if it is cancelled already */
+ if (g_cancellable_is_cancelled (cancellable))
+ g_cancellable_cancel (task_cancellable);
+
+ task = g_task_new (rfkill, task_cancellable, callback, user_data);
+ g_task_set_source_tag (task, cc_rfkill_glib_send_change_all_event);
+
+ /* Clear any previous task. */
+ cancel_current_task (rfkill);
+ g_assert (rfkill->task == NULL);
+
+ /* Start writing out a new event. */
+ event = g_new0 (struct rfkill_event, 1);
+ event->op = RFKILL_OP_CHANGE_ALL;
+ event->type = rfkill_type;
+ event->soft = enable ? 1 : 0;
+
+ g_task_set_task_data (task, event, g_free);
+ rfkill->task = g_object_ref (task);
+ rfkill->change_all_timeout_id = 0;
+
+ g_output_stream_write_async (rfkill->stream,
+ event, sizeof(struct rfkill_event),
+ G_PRIORITY_DEFAULT,
+ task_cancellable, write_change_all_done_cb,
+ g_object_ref (task));
+}
+
+static const char *
+type_to_string (unsigned int type)
+{
+ switch (type) {
+ case RFKILL_TYPE_ALL:
+ return "ALL";
+ case RFKILL_TYPE_WLAN:
+ return "WLAN";
+ case RFKILL_TYPE_BLUETOOTH:
+ return "BLUETOOTH";
+ case RFKILL_TYPE_UWB:
+ return "UWB";
+ case RFKILL_TYPE_WIMAX:
+ return "WIMAX";
+ case RFKILL_TYPE_WWAN:
+ return "WWAN";
+ default:
+ return "UNKNOWN";
+ }
+}
+
+static const char *
+op_to_string (unsigned int op)
+{
+ switch (op) {
+ case RFKILL_OP_ADD:
+ return "ADD";
+ case RFKILL_OP_DEL:
+ return "DEL";
+ case RFKILL_OP_CHANGE:
+ return "CHANGE";
+ case RFKILL_OP_CHANGE_ALL:
+ return "CHANGE_ALL";
+ default:
+ g_assert_not_reached ();
+ }
+}
+
+static void
+print_event (struct rfkill_event *event)
+{
+ g_debug ("RFKILL event: idx %u type %u (%s) op %u (%s) soft %u hard %u",
+ event->idx,
+ event->type, type_to_string (event->type),
+ event->op, op_to_string (event->op),
+ event->soft, event->hard);
+}
+
+static gboolean
+got_change_event (GList *events)
+{
+ GList *l;
+
+ g_assert (events != NULL);
+
+ for (l = events ; l != NULL; l = l->next) {
+ struct rfkill_event *event = l->data;
+
+ if (event->op == RFKILL_OP_CHANGE)
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static void
+emit_changed_signal_and_free (CcRfkillGlib *rfkill,
+ GList *events)
+{
+ if (events == NULL)
+ return;
+
+ g_signal_emit (G_OBJECT (rfkill),
+ signals[CHANGED],
+ 0, events);
+
+ if (rfkill->change_all_timeout_id > 0 &&
+ got_change_event (events)) {
+ struct rfkill_event *event;
+
+ g_debug ("Received a change event after a RFKILL_OP_CHANGE_ALL event, re-sending RFKILL_OP_CHANGE_ALL");
+
+ event = g_task_get_task_data (rfkill->task);
+ g_output_stream_write_async (rfkill->stream,
+ event, sizeof(struct rfkill_event),
+ G_PRIORITY_DEFAULT,
+ g_task_get_cancellable (rfkill->task),
+ write_change_all_again_done_cb,
+ g_object_ref (rfkill->task));
+
+ g_source_remove (rfkill->change_all_timeout_id);
+ rfkill->change_all_timeout_id = 0;
+ }
+
+ g_list_free_full (events, g_free);
+}
+
+static gboolean
+event_cb (GIOChannel *source,
+ GIOCondition condition,
+ CcRfkillGlib *rfkill)
+{
+ GList *events;
+
+ events = NULL;
+
+ if (condition & G_IO_IN) {
+ GIOStatus status;
+ struct rfkill_event event;
+ gsize read;
+
+ status = g_io_channel_read_chars (source,
+ (char *) &event,
+ sizeof(event),
+ &read,
+ NULL);
+
+ while (status == G_IO_STATUS_NORMAL && read == sizeof(event)) {
+ struct rfkill_event *event_ptr;
+
+ print_event (&event);
+
+ event_ptr = g_memdup (&event, sizeof(event));
+ events = g_list_prepend (events, event_ptr);
+
+ status = g_io_channel_read_chars (source,
+ (char *) &event,
+ sizeof(event),
+ &read,
+ NULL);
+ }
+ events = g_list_reverse (events);
+ } else {
+ g_debug ("Something unexpected happened on rfkill fd");
+ return FALSE;
+ }
+
+ emit_changed_signal_and_free (rfkill, events);
+
+ return TRUE;
+}
+
+static void
+cc_rfkill_glib_init (CcRfkillGlib *rfkill)
+{
+ rfkill->device_file = NULL;
+ rfkill->noinput_fd = -1;
+}
+
+static gboolean
+_cc_rfkill_glib_open (CcRfkillGlib *rfkill,
+ GError **error)
+{
+ int fd;
+ int ret;
+ GList *events;
+
+ g_return_val_if_fail (CC_RFKILL_IS_GLIB (rfkill), FALSE);
+ g_return_val_if_fail (rfkill->stream == NULL, FALSE);
+ g_assert (rfkill->device_file);
+
+ fd = open (rfkill->device_file, O_RDWR);
+
+ if (fd < 0) {
+ g_set_error_literal (error, G_IO_ERROR, g_io_error_from_errno (errno),
+ "Could not open RFKILL control device, please verify your installation");
+ return FALSE;
+ }
+
+ ret = fcntl(fd, F_SETFL, O_NONBLOCK);
+ if (ret < 0) {
+ g_set_error_literal (error, G_IO_ERROR, g_io_error_from_errno (errno),
+ "Can't set RFKILL control device to non-blocking");
+ close(fd);
+ return FALSE;
+ }
+
+ events = NULL;
+
+ while (1) {
+ struct rfkill_event event;
+ struct rfkill_event *event_ptr;
+ ssize_t len;
+
+ len = read(fd, &event, sizeof(event));
+ if (len < 0) {
+ if (errno == EAGAIN)
+ break;
+ g_debug ("Reading of RFKILL events failed");
+ break;
+ }
+
+ if (len != RFKILL_EVENT_SIZE_V1) {
+ g_warning ("Wrong size of RFKILL event\n");
+ continue;
+ }
+
+ if (event.op != RFKILL_OP_ADD)
+ continue;
+
+ g_debug ("Read killswitch of type '%s' (idx=%d): soft %d hard %d",
+ type_to_string (event.type),
+ event.idx, event.soft, event.hard);
+
+ event_ptr = g_memdup (&event, sizeof(event));
+ events = g_list_prepend (events, event_ptr);
+ }
+
+ /* Setup monitoring */
+ rfkill->channel = g_io_channel_unix_new (fd);
+ g_io_channel_set_encoding (rfkill->channel, NULL, NULL);
+ g_io_channel_set_buffered (rfkill->channel, FALSE);
+ rfkill->watch_id = g_io_add_watch (rfkill->channel,
+ G_IO_IN | G_IO_HUP | G_IO_ERR,
+ (GIOFunc) event_cb,
+ rfkill);
+
+ if (events) {
+ events = g_list_reverse (events);
+ emit_changed_signal_and_free (rfkill, events);
+ } else {
+ g_debug ("No rfkill device available on startup");
+ }
+
+ /* Setup write stream */
+ rfkill->stream = g_unix_output_stream_new (fd, TRUE);
+
+ return TRUE;
+}
+
+static void
+uevent_cb (GUdevClient *client,
+ gchar *action,
+ GUdevDevice *device,
+ gpointer user_data)
+{
+ CcRfkillGlib *rfkill = CC_RFKILL_GLIB (user_data);
+
+ if (g_strcmp0 (action, "add") != 0)
+ return;
+
+ if (g_strcmp0 (g_udev_device_get_name (device), "rfkill") == 0) {
+ g_autoptr(GError) error = NULL;
+
+ g_debug ("Rfkill device has been created");
+
+ if (g_udev_device_get_device_file (device)) {
+ g_clear_pointer (&rfkill->device_file, g_free);
+ rfkill->device_file = g_strdup (g_udev_device_get_device_file (device));
+ } else {
+ g_warning ("rfkill udev device does not have a device file!");
+ }
+
+ if (!_cc_rfkill_glib_open (rfkill, &error))
+ g_warning ("Could not open rfkill device: %s", error->message);
+ else
+ g_debug ("Opened rfkill device after uevent");
+
+ g_clear_object (&rfkill->udev);
+
+ /* Sync rfkill input inhibition state*/
+ cc_rfkill_glib_set_rfkill_input_inhibited (rfkill, rfkill->noinput);
+ }
+}
+
+gboolean
+cc_rfkill_glib_open (CcRfkillGlib *rfkill,
+ GError **error)
+{
+ const char * const subsystems[] = { "misc", NULL };
+ GUdevDevice *device;
+
+ rfkill->udev = g_udev_client_new (subsystems);
+ g_debug ("Setting up uevent listener");
+ g_signal_connect (rfkill->udev, "uevent", G_CALLBACK (uevent_cb), rfkill);
+
+ /* Simulate uevent if device already exists. */
+ device = g_udev_client_query_by_subsystem_and_name (rfkill->udev, "misc", "rfkill");
+ if (device)
+ uevent_cb (rfkill->udev, "add", device, rfkill);
+
+ return TRUE;
+}
+
+#define RFKILL_INPUT_INHIBITED(rfkill) (rfkill->noinput_fd >= 0)
+
+gboolean
+cc_rfkill_glib_get_rfkill_input_inhibited (CcRfkillGlib *rfkill)
+{
+ g_return_val_if_fail (CC_RFKILL_IS_GLIB (rfkill), FALSE);
+
+ return rfkill->noinput;
+}
+
+void
+cc_rfkill_glib_set_rfkill_input_inhibited (CcRfkillGlib *rfkill,
+ gboolean inhibit)
+{
+ g_return_if_fail (CC_RFKILL_IS_GLIB (rfkill));
+
+ /* Shortcut in case we don't have an rfkill device */
+ if (!rfkill->stream) {
+ if (rfkill->noinput == inhibit)
+ return;
+
+ rfkill->noinput = inhibit;
+ g_object_notify (G_OBJECT (rfkill), "rfkill-input-inhibited");
+
+ return;
+ }
+
+ if (!inhibit && RFKILL_INPUT_INHIBITED(rfkill)) {
+ close (rfkill->noinput_fd);
+ g_debug ("Closed rfkill noinput FD.");
+
+ rfkill->noinput_fd = -1;
+ }
+
+ if (inhibit && !RFKILL_INPUT_INHIBITED(rfkill)) {
+ int fd, res;
+ /* Open write only as we don't want to do any IO to it ever. */
+ fd = open (rfkill->device_file, O_WRONLY);
+ if (fd < 0) {
+ if (errno == EACCES)
+ g_warning ("Could not open RFKILL control device, please verify your installation");
+ else
+ g_debug ("Could not open RFKILL control device: %s", g_strerror (errno));
+ return;
+ }
+
+ res = ioctl (fd, RFKILL_IOCTL_NOINPUT, (long) 0);
+ if (res != 0) {
+ g_warning ("Could not disable kernel handling of RFKILL related keys: %s", g_strerror (errno));
+ close (fd);
+ return;
+ }
+
+ g_debug ("Opened rfkill-input inhibitor.");
+
+ rfkill->noinput_fd = fd;
+ }
+
+ if (rfkill->noinput != RFKILL_INPUT_INHIBITED(rfkill)) {
+ rfkill->noinput = RFKILL_INPUT_INHIBITED(rfkill);
+ g_object_notify (G_OBJECT (rfkill), "rfkill-input-inhibited");
+ }
+}
+
+static void
+cc_rfkill_glib_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ CcRfkillGlib *rfkill = CC_RFKILL_GLIB (object);
+
+ switch (prop_id) {
+ case PROP_RFKILL_INPUT_INHIBITED:
+ cc_rfkill_glib_set_rfkill_input_inhibited (rfkill, g_value_get_boolean (value));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+cc_rfkill_glib_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ CcRfkillGlib *rfkill = CC_RFKILL_GLIB (object);
+
+ switch (prop_id) {
+ case PROP_RFKILL_INPUT_INHIBITED:
+ g_value_set_boolean (value, rfkill->noinput);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+cc_rfkill_glib_finalize (GObject *object)
+{
+ CcRfkillGlib *rfkill = CC_RFKILL_GLIB (object);
+
+ cancel_current_task (rfkill);
+
+ /* cleanup monitoring */
+ if (rfkill->watch_id > 0) {
+ g_source_remove (rfkill->watch_id);
+ rfkill->watch_id = 0;
+ g_io_channel_shutdown (rfkill->channel, FALSE, NULL);
+ g_io_channel_unref (rfkill->channel);
+ }
+ g_clear_object (&rfkill->stream);
+
+ if (RFKILL_INPUT_INHIBITED(rfkill)) {
+ close (rfkill->noinput_fd);
+ rfkill->noinput_fd = -1;
+ }
+
+ g_clear_pointer (&rfkill->device_file, g_free);
+ g_clear_object (&rfkill->udev);
+
+ G_OBJECT_CLASS(cc_rfkill_glib_parent_class)->finalize(object);
+}
+
+static void
+cc_rfkill_glib_class_init(CcRfkillGlibClass *klass)
+{
+ GObjectClass *object_class = (GObjectClass *) klass;
+
+ object_class->set_property = cc_rfkill_glib_set_property;
+ object_class->get_property = cc_rfkill_glib_get_property;
+ object_class->finalize = cc_rfkill_glib_finalize;
+
+ g_object_class_install_property (object_class,
+ PROP_RFKILL_INPUT_INHIBITED,
+ g_param_spec_boolean ("rfkill-input-inhibited",
+ "Rfkill input inhibited",
+ "Whether to prevent the kernel from handling RFKILL related key events.",
+ FALSE,
+ G_PARAM_READWRITE));
+
+ signals[CHANGED] =
+ g_signal_new ("changed",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL, NULL,
+ NULL,
+ G_TYPE_NONE, 1, G_TYPE_POINTER);
+
+}
+
+CcRfkillGlib *
+cc_rfkill_glib_new (void)
+{
+ return CC_RFKILL_GLIB (g_object_new (CC_RFKILL_TYPE_GLIB, NULL));
+}