[glib/wip/kdbus-junk: 23/37] [kdbus][wip] Add matches for kernel notifications

[Ryan Lortie <desrt src gnome org>]

commit f2cdea88c8b7341def4420fd5cdecc6786f2355a
Author: Lukasz Skalski <l skalski samsung com>
Date:   Mon Oct 27 13:05:08 2014 +0000

    [kdbus][wip] Add matches for kernel notifications

 gio/gdbusconnection.c |   17 ++++++
 gio/gkdbus.c          |  132 +++++++++++++++++++++++++++++++++++++++++++++++++
 gio/gkdbus.h          |    6 ++
 3 files changed, 155 insertions(+), 0 deletions(-)
---
diff --git a/gio/gdbusconnection.c b/gio/gdbusconnection.c
index 94a69f1..37ca4d7 100644
--- a/gio/gdbusconnection.c
+++ b/gio/gdbusconnection.c
@@ -3990,6 +3990,16 @@ g_dbus_connection_signal_subscribe (GDBusConnection     *connection,
     {
       if (!is_signal_data_for_name_lost_or_acquired (signal_data))
         add_match_rule (connection, signal_data->rule);
+      else
+        {
+          if (G_IS_KDBUS_CONNECTION (connection->stream))
+            {
+              if (g_strcmp0 (signal_data->member, "NameAcquired") == 0)
+                _g_kdbus_subscribe_name_acquired (connection, arg0);
+              else if (g_strcmp0 (signal_data->member, "NameLost") == 0)
+                _g_kdbus_subscribe_name_lost (connection, arg0);
+            }
+        }
     }
 
   signal_data_array = g_hash_table_lookup (connection->map_sender_unique_name_to_signal_data_array,
@@ -4076,6 +4086,13 @@ unsubscribe_id_internal (GDBusConnection *connection,
                */
               remove_match_rule (connection, signal_data->rule);
             }
+          else
+            {
+              if (G_IS_KDBUS_CONNECTION (connection->stream))
+                {
+                  //_g_kdbus_unsubscribe_name_lost_and_acquired (connection, arg0);
+                }
+            }
 
           signal_data_free (signal_data);
         }
diff --git a/gio/gkdbus.c b/gio/gkdbus.c
index 9674cc7..d8e9c13 100644
--- a/gio/gkdbus.c
+++ b/gio/gkdbus.c
@@ -1252,6 +1252,138 @@ _g_kdbus_GetConnectionUnixUser (GDBusConnection  *connection,
 }
 
 
+/*
+ * _g_kdbus_subscribe_name_acquired:
+ *
+ */
+static void
+_g_kdbus_subscribe_name_owner_changed (GDBusConnection  *connection,
+                                       const gchar      *name,
+                                       const gchar      *old_name,
+                                       const gchar      *new_name)
+{
+  GKdbus *kdbus;
+  struct kdbus_item *item;
+  struct kdbus_cmd_match *cmd_match;
+  gssize size, len;
+  gint ret;
+
+  guint64 old_id = KDBUS_MATCH_ID_ANY;
+  guint64 new_id = KDBUS_MATCH_ID_ANY;
+
+  kdbus = _g_kdbus_connection_get_kdbus (G_KDBUS_CONNECTION (g_dbus_connection_get_stream (connection)));
+
+  len = strlen(name) + 1;
+  size = KDBUS_ALIGN8(G_STRUCT_OFFSET (struct kdbus_cmd_match, items) +
+                      G_STRUCT_OFFSET (struct kdbus_item, name_change) +
+                      G_STRUCT_OFFSET (struct kdbus_notify_name_change, name) + len);
+
+  cmd_match = g_alloca0 (size);
+  cmd_match->size = size;
+  cmd_match->cookie = 1000;
+  item = cmd_match->items;
+
+  /* KDBUS_ITEM_NAME_CHANGE */
+  item->type = KDBUS_ITEM_NAME_CHANGE;
+  item->name_change.old_id.id = old_id;
+  item->name_change.new_id.id = new_id;
+  memcpy(item->name_change.name, name, len);
+  item->size = G_STRUCT_OFFSET (struct kdbus_item, name_change) +
+               G_STRUCT_OFFSET(struct kdbus_notify_name_change, name) + len;
+  item = KDBUS_ITEM_NEXT(item);
+
+  ret = ioctl(kdbus->priv->fd, KDBUS_CMD_MATCH_ADD, cmd_match);
+  if (ret < 0)
+    g_warning ("ERROR - %d\n", (int) errno);
+}
+
+
+/*
+ * _g_kdbus_subscribe_name_acquired:
+ *
+ */
+void
+_g_kdbus_subscribe_name_acquired (GDBusConnection  *connection,
+                                  const gchar      *name)
+{
+  GKdbus *kdbus;
+  struct kdbus_item *item;
+  struct kdbus_cmd_match *cmd_match;
+  gssize size, len;
+  gint ret;
+
+  kdbus = _g_kdbus_connection_get_kdbus (G_KDBUS_CONNECTION (g_dbus_connection_get_stream (connection)));
+
+  len = strlen(name) + 1;
+  size = KDBUS_ALIGN8(G_STRUCT_OFFSET (struct kdbus_cmd_match, items) +
+                      G_STRUCT_OFFSET (struct kdbus_item, name_change) +
+                      G_STRUCT_OFFSET (struct kdbus_notify_name_change, name) + len);
+
+  cmd_match = g_alloca0 (size);
+  cmd_match->size = size;
+  cmd_match->cookie = 1001;
+  item = cmd_match->items;
+
+  /* KDBUS_ITEM_NAME_ADD */
+  item->type = KDBUS_ITEM_NAME_ADD;
+  item->name_change.old_id.id = KDBUS_MATCH_ID_ANY;
+  item->name_change.new_id.id = kdbus->priv->unique_id;
+  memcpy(item->name_change.name, name, len);
+  item->size = G_STRUCT_OFFSET (struct kdbus_item, name_change) +
+               G_STRUCT_OFFSET(struct kdbus_notify_name_change, name) + len;
+  item = KDBUS_ITEM_NEXT(item);
+
+  ret = ioctl(kdbus->priv->fd, KDBUS_CMD_MATCH_ADD, cmd_match);
+  if (ret < 0)
+    g_warning ("ERROR - %d\n", (int) errno);
+
+  _g_kdbus_subscribe_name_owner_changed (connection, name, "test", "test");
+}
+
+
+/*
+ * _g_kdbus_subscribe_name_lost:
+ *
+ */
+void
+_g_kdbus_subscribe_name_lost (GDBusConnection  *connection,
+                              const gchar      *name)
+{
+  GKdbus *kdbus;
+  struct kdbus_item *item;
+  struct kdbus_cmd_match *cmd_match;
+  gssize size, len;
+  gint ret;
+
+  kdbus = _g_kdbus_connection_get_kdbus (G_KDBUS_CONNECTION (g_dbus_connection_get_stream (connection)));
+
+  len = strlen(name) + 1;
+  size = KDBUS_ALIGN8(G_STRUCT_OFFSET (struct kdbus_cmd_match, items) +
+                      G_STRUCT_OFFSET (struct kdbus_item, name_change) +
+                      G_STRUCT_OFFSET (struct kdbus_notify_name_change, name) + len);
+
+  cmd_match = g_alloca0 (size);
+  cmd_match->size = size;
+  cmd_match->cookie = 1002;
+  item = cmd_match->items;
+
+  /* KDBUS_ITEM_NAME_REMOVE */
+  item->type = KDBUS_ITEM_NAME_REMOVE;
+  item->name_change.old_id.id = kdbus->priv->unique_id;
+  item->name_change.new_id.id = KDBUS_MATCH_ID_ANY;
+  memcpy(item->name_change.name, name, len);
+  item->size = G_STRUCT_OFFSET (struct kdbus_item, name_change) +
+               G_STRUCT_OFFSET(struct kdbus_notify_name_change, name) + len;
+  item = KDBUS_ITEM_NEXT(item);
+
+  ret = ioctl(kdbus->priv->fd, KDBUS_CMD_MATCH_ADD, cmd_match);
+  if (ret < 0)
+    g_warning ("ERROR - %d\n", (int) errno);
+
+  _g_kdbus_subscribe_name_owner_changed (connection, name, "test", "test");
+}
+
+
 /**
 * g_kdbus_decode_kernel_msg:
 *
diff --git a/gio/gkdbus.h b/gio/gkdbus.h
index bb6adac..df2acb5 100644
--- a/gio/gkdbus.h
+++ b/gio/gkdbus.h
@@ -109,6 +109,12 @@ GVariant *                              _g_kdbus_GetConnectionUnixUser      (GDB
                                                                              const gchar      *name,
                                                                              GError          **error);
 
+void                                    _g_kdbus_subscribe_name_acquired    (GDBusConnection  *connection,
+                                                                             const gchar      *name);
+
+void                                    _g_kdbus_subscribe_name_lost        (GDBusConnection  *connection,
+                                                                             const gchar      *name);
+
 gssize                                  _g_kdbus_receive                    (GKdbus           *kdbus,
                                                                              GCancellable     *cancellable,
                                                                              GError          **error);