gio/gnetworkmonitornm.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright 2014 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "config.h"
  20
  21 #include <errno.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include "gnetworkmonitornm.h"
  26 #include "gioerror.h"
  27 #include "ginitable.h"
  28 #include "giomodule-priv.h"
  29 #include "glibintl.h"
  30 #include "glib/gstdio.h"
  31 #include "gnetworkingprivate.h"
  32 #include "gnetworkmonitor.h"
  33 #include "gdbusproxy.h"
  34
  35 static void g_network_monitor_nm_iface_init (GNetworkMonitorInterface *iface);
  36 static void g_network_monitor_nm_initable_iface_init (GInitableIface *iface);
  37
  38 enum
  39 {
  40   PROP_0,
  41
  42   PROP_NETWORK_AVAILABLE,
  43   PROP_NETWORK_METERED,
  44   PROP_CONNECTIVITY
  45 };
  46
  47 typedef enum {
  48   NM_CONNECTIVITY_UNKNOWN,
  49   NM_CONNECTIVITY_NONE,
  50   NM_CONNECTIVITY_PORTAL,
  51   NM_CONNECTIVITY_LIMITED,
  52   NM_CONNECTIVITY_FULL
  53 } NMConnectivityState;
  54
  55 struct _GNetworkMonitorNMPrivate
  56 {
  57   GDBusProxy *proxy;
  58
  59   GNetworkConnectivity connectivity;
  60   gboolean network_available;
  61   gboolean network_metered;
  62 };
  63
  64 #define g_network_monitor_nm_get_type _g_network_monitor_nm_get_type
  65 G_DEFINE_TYPE_WITH_CODE (GNetworkMonitorNM, g_network_monitor_nm, G_TYPE_NETWORK_MONITOR_NETLINK,
  66                          G_ADD_PRIVATE (GNetworkMonitorNM)
  67                          G_IMPLEMENT_INTERFACE (G_TYPE_NETWORK_MONITOR,
  68                                                 g_network_monitor_nm_iface_init)
  69                          G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
  70                                                 g_network_monitor_nm_initable_iface_init)
  71                          _g_io_modules_ensure_extension_points_registered ();
  72                          g_io_extension_point_implement (G_NETWORK_MONITOR_EXTENSION_POINT_NAME,
  73                                                          g_define_type_id,
  74                                                          "networkmanager",
  75                                                          30))
  76
  77 static void
  78 g_network_monitor_nm_init (GNetworkMonitorNM *nm)
  79 {
  80   nm->priv = g_network_monitor_nm_get_instance_private (nm);
  81 }
  82
  83 static void
  84 g_network_monitor_nm_get_property (GObject    *object,
  85                                    guint       prop_id,
  86                                    GValue     *value,
  87                                    GParamSpec *pspec)
  88 {
  89   GNetworkMonitorNM *nm = G_NETWORK_MONITOR_NM (object);
  90
  91   switch (prop_id)
  92     {
  93     case PROP_NETWORK_AVAILABLE:
  94       g_value_set_boolean (value, nm->priv->network_available);
  95       break;
  96
  97     case PROP_NETWORK_METERED:
  98       g_value_set_boolean (value, nm->priv->network_metered);
  99       break;
 100
 101     case PROP_CONNECTIVITY:
 102       g_value_set_enum (value, nm->priv->connectivity);
 103       break;
 104
 105     default:
 106       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 107       break;
 108     }
 109 }
 110
 111 static GNetworkConnectivity
 112 nm_conn_to_g_conn (int nm_state)
 113 {
 114   switch (nm_state)
 115     {
 116       case NM_CONNECTIVITY_UNKNOWN:
 117         return G_NETWORK_CONNECTIVITY_LOCAL;
 118       case NM_CONNECTIVITY_NONE:
 119         return G_NETWORK_CONNECTIVITY_LOCAL;
 120       case NM_CONNECTIVITY_PORTAL:
 121         return G_NETWORK_CONNECTIVITY_PORTAL;
 122       case NM_CONNECTIVITY_LIMITED:
 123         return G_NETWORK_CONNECTIVITY_LIMITED;
 124       case NM_CONNECTIVITY_FULL:
 125         return G_NETWORK_CONNECTIVITY_FULL;
 126       default:
 127         g_warning ("Unknown NM connectivity state %d", nm_state);
 128         return G_NETWORK_CONNECTIVITY_LOCAL;
 129     }
 130 }
 131
 132 static gboolean
 133 nm_metered_to_bool (guint nm_metered)
 134 {
 135   switch (nm_metered)
 136     {
 137       case 1: /* yes */
 138       case 3: /* guess-yes */
 139         return TRUE;
 140       case 0: /* unknown */
 141         /* We default to FALSE in the unknown-because-you're-not-running-NM
 142          * case, so we should return FALSE in the
 143          * unknown-when-you-are-running-NM case too. */
 144       case 2: /* no */
 145       case 4: /* guess-no */
 146         return FALSE;
 147       default:
 148         g_warning ("Unknown NM metered state %d", nm_metered);
 149         return FALSE;
 150     }
 151 }
 152
 153 static void
 154 sync_properties (GNetworkMonitorNM *nm,
 155                  gboolean           emit_signals)
 156 {
 157   GVariant *v;
 158   NMConnectivityState nm_connectivity;
 159   gboolean new_network_available;
 160   gboolean new_network_metered;
 161   GNetworkConnectivity new_connectivity;
 162
 163   v = g_dbus_proxy_get_cached_property (nm->priv->proxy, "Connectivity");
 164   nm_connectivity = g_variant_get_uint32 (v);
 165   g_variant_unref (v);
 166
 167   if (nm_connectivity == NM_CONNECTIVITY_NONE)
 168     {
 169       new_network_available = FALSE;
 170       new_network_metered = FALSE;
 171       new_connectivity = G_NETWORK_CONNECTIVITY_LOCAL;
 172     }
 173   else
 174     {
 175
 176       /* this is only available post NM 1.0 */
 177       v = g_dbus_proxy_get_cached_property (nm->priv->proxy, "Metered");
 178       if (v == NULL)
 179         {
 180           new_network_metered = FALSE;
 181         }
 182       else
 183         {
 184           new_network_metered = nm_metered_to_bool (g_variant_get_uint32 (v));
 185           g_variant_unref (v);
 186         }
 187
 188       new_network_available = TRUE;
 189       new_connectivity = nm_conn_to_g_conn (nm_connectivity);
 190     }
 191
 192   if (!emit_signals)
 193     {
 194       nm->priv->network_metered = new_network_metered;
 195       nm->priv->network_available = new_network_available;
 196       nm->priv->connectivity = new_connectivity;
 197       return;
 198     }
 199
 200   if (new_network_available != nm->priv->network_available)
 201     {
 202       nm->priv->network_available = new_network_available;
 203       g_object_notify (G_OBJECT (nm), "network-available");
 204     }
 205   if (new_network_metered != nm->priv->network_metered)
 206     {
 207       nm->priv->network_metered = new_network_metered;
 208       g_object_notify (G_OBJECT (nm), "network-metered");
 209     }
 210   if (new_connectivity != nm->priv->connectivity)
 211     {
 212       nm->priv->connectivity = new_connectivity;
 213       g_object_notify (G_OBJECT (nm), "connectivity");
 214     }
 215 }
 216
 217 static void
 218 update_cached_property (GDBusProxy   *proxy,
 219                         const char   *property_name,
 220                         GVariantDict *dict)
 221 {
 222   GVariant *v;
 223
 224   v = g_variant_dict_lookup_value (dict, property_name, NULL);
 225   if (!v)
 226     return;
 227   g_dbus_proxy_set_cached_property (proxy, property_name, v);
 228 }
 229
 230 static void
 231 proxy_signal_cb (GDBusProxy        *proxy,
 232                  gchar             *sender_name,
 233                  gchar             *signal_name,
 234                  GVariant          *parameters,
 235                  GNetworkMonitorNM *nm)
 236 {
 237   GVariant *asv;
 238   GVariantDict *dict;
 239
 240   if (g_strcmp0 (signal_name, "PropertiesChanged") != 0)
 241     return;
 242
 243   g_variant_get (parameters, "(@a{sv})", &asv);
 244   if (!asv)
 245     return;
 246
 247   dict = g_variant_dict_new (asv);
 248   if (!dict)
 249     {
 250       g_warning ("Failed to handle PropertiesChanged signal from NetworkManager");
 251       return;
 252     }
 253
 254   update_cached_property (nm->priv->proxy, "Connectivity", dict);
 255
 256   g_variant_dict_unref (dict);
 257
 258   sync_properties (nm, TRUE);
 259 }
 260
 261 static gboolean
 262 has_property (GDBusProxy *proxy,
 263               const char *property_name)
 264 {
 265   char **props;
 266   guint i;
 267   gboolean prop_found = FALSE;
 268
 269   props = g_dbus_proxy_get_cached_property_names (proxy);
 270
 271   if (!props)
 272     return FALSE;
 273
 274   for (i = 0; props[i] != NULL; i++)
 275     {
 276       if (g_str_equal (props[i], property_name))
 277         {
 278           prop_found = TRUE;
 279           break;
 280         }
 281     }
 282
 283   g_strfreev (props);
 284   return prop_found;
 285 }
 286
 287 static gboolean
 288 g_network_monitor_nm_initable_init (GInitable     *initable,
 289                                     GCancellable  *cancellable,
 290                                     GError       **error)
 291 {
 292   GNetworkMonitorNM *nm = G_NETWORK_MONITOR_NM (initable);
 293   GDBusProxy *proxy;
 294   GInitableIface *parent_iface;
 295   gchar *name_owner = NULL;
 296
 297   parent_iface = g_type_interface_peek_parent (G_NETWORK_MONITOR_NM_GET_INITABLE_IFACE (initable));
 298   if (!parent_iface->init (initable, cancellable, error))
 299     return FALSE;
 300
 301   proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
 302                                          G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START | G_DBUS_PROXY_FLAGS_GET_INVALIDATED_PROPERTIES,
 303                                          NULL,
 304                                          "org.freedesktop.NetworkManager",
 305                                          "/org/freedesktop/NetworkManager",
 306                                          "org.freedesktop.NetworkManager",
 307                                          cancellable,
 308                                          error);
 309   if (!proxy)
 310     return FALSE;
 311
 312   name_owner = g_dbus_proxy_get_name_owner (proxy);
 313
 314   if (!name_owner)
 315     {
 316       g_object_unref (proxy);
 317       return FALSE;
 318     }
 319
 320   g_free (name_owner);
 321
 322   /* Verify it has the PrimaryConnection and Connectivity properties */
 323   if (!has_property (proxy, "Connectivity"))
 324     {
 325       g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
 326                    _("NetworkManager version too old"));
 327       g_object_unref (proxy);
 328       return FALSE;
 329     }
 330
 331   g_signal_connect (G_OBJECT (proxy), "g-signal",
 332                     G_CALLBACK (proxy_signal_cb), nm);
 333   nm->priv->proxy = proxy;
 334   sync_properties (nm, FALSE);
 335
 336   return TRUE;
 337 }
 338
 339 static void
 340 g_network_monitor_nm_finalize (GObject *object)
 341 {
 342   GNetworkMonitorNM *nm = G_NETWORK_MONITOR_NM (object);
 343
 344   g_clear_object (&nm->priv->proxy);
 345
 346   G_OBJECT_CLASS (g_network_monitor_nm_parent_class)->finalize (object);
 347 }
 348
 349 static void
 350 g_network_monitor_nm_class_init (GNetworkMonitorNMClass *nl_class)
 351 {
 352   GObjectClass *gobject_class = G_OBJECT_CLASS (nl_class);
 353
 354   gobject_class->finalize  = g_network_monitor_nm_finalize;
 355   gobject_class->get_property = g_network_monitor_nm_get_property;
 356
 357   g_object_class_override_property (gobject_class, PROP_NETWORK_AVAILABLE, "network-available");
 358   g_object_class_override_property (gobject_class, PROP_NETWORK_METERED, "network-metered");
 359   g_object_class_override_property (gobject_class, PROP_CONNECTIVITY, "connectivity");
 360 }
 361
 362 static void
 363 g_network_monitor_nm_iface_init (GNetworkMonitorInterface *monitor_iface)
 364 {
 365 }
 366
 367 static void
 368 g_network_monitor_nm_initable_iface_init (GInitableIface *iface)
 369 {
 370   iface->init = g_network_monitor_nm_initable_init;
 371 }