gboolean nm_netlink_monitor_subscribe (NMNetlinkMonitor *self, int group, GError **error) { NMNetlinkMonitorPrivate *priv; int subs, err; g_return_val_if_fail (NM_IS_NETLINK_MONITOR (self), FALSE); priv = NM_NETLINK_MONITOR_GET_PRIVATE (self); if (!priv->nlh_event) { if (!nm_netlink_monitor_open_connection (self, error)) return FALSE; } subs = get_subs (self, group) + 1; if (subs == 1) { err = nl_socket_add_membership (priv->nlh_event, group); if (err < 0) { g_set_error (error, NM_NETLINK_MONITOR_ERROR, NM_NETLINK_MONITOR_ERROR_NETLINK_JOIN_GROUP, _("unable to join netlink group: %s"), nl_geterror (err)); return FALSE; } } /* Update # of subscriptions for this group */ set_subs (self, group, subs); return TRUE; }
NMNetlinkMonitor * nm_netlink_monitor_get (void) { static NMNetlinkMonitor *singleton = NULL; GError *error = NULL; if (!singleton) { singleton = (NMNetlinkMonitor *) g_object_new (NM_TYPE_NETLINK_MONITOR, NULL); g_return_val_if_fail (singleton != NULL, NULL); if (nm_netlink_monitor_open_connection (singleton, &error)) { nm_netlink_monitor_attach (singleton); /* Request initial status of cards */ nm_netlink_monitor_request_status (singleton); } else { nm_log_warn (LOGD_HW, "Failed to connect to netlink: (%d) %s", error ? error->code : 0, (error && error->message) ? error->message : "(unknown)"); g_clear_error (&error); g_object_unref (singleton); singleton = NULL; } } else g_object_ref (singleton); return singleton; }
int main (void) { NmNetlinkMonitor *monitor; GMainLoop *loop; GError *error; g_type_init (); monitor = nm_netlink_monitor_new (); error = NULL; nm_netlink_monitor_open_connection (monitor, &error); if (error != NULL) { g_printerr ("could not open connection: %s\n", error->message); g_error_free (error); return 1; } loop = g_main_loop_new (NULL, FALSE); g_signal_connect (G_OBJECT (monitor), "interface-connected", G_CALLBACK (device_added), NULL); g_signal_connect (G_OBJECT (monitor), "interface-disconnected", G_CALLBACK (device_removed), NULL); nm_netlink_monitor_attach (monitor, NULL); nm_netlink_monitor_request_status (monitor, &error); if (error != NULL) { g_printerr ("could not request status of interfaces: %s\n", error->message); g_error_free (error); return 2; } g_main_loop_run (loop); return 0; }