/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ /* * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA. * * (C) Copyright 2010 Red Hat, Inc. */ /* * The example shows how to call the D-Bus properties interface to get the * list of currently active connections known to NetworkManager. It uses * dbus-glib and libnm-util libraries. * * Compile with: * gcc -Wall `pkg-config --libs --cflags glib-2.0 dbus-glib-1 libnm-util` get-active-connections.c -o get-active-connections */ #include #include #include #include #include #include #include #include #define DBUS_TYPE_G_MAP_OF_VARIANT (dbus_g_type_get_map ("GHashTable", G_TYPE_STRING, G_TYPE_VALUE)) #define DBUS_TYPE_G_MAP_OF_MAP_OF_VARIANT (dbus_g_type_get_map ("GHashTable", G_TYPE_STRING, DBUS_TYPE_G_MAP_OF_VARIANT)) #define DBUS_TYPE_G_ARRAY_OF_OBJECT_PATH (dbus_g_type_get_collection ("GPtrArray", DBUS_TYPE_G_OBJECT_PATH)) static void print_connection (DBusGConnection *bus, const char *service, const char *path) { DBusGProxy *proxy; GError *error = NULL; GHashTable *hash = NULL; NMConnection *connection = NULL; /* This function asks the Settings Service that provides this network * configuration for the details of that configuration. */ /* Create the D-Bus proxy for the Settings Service so we can ask it for the * connection configuration details. */ proxy = dbus_g_proxy_new_for_name (bus, service, path, NM_DBUS_IFACE_SETTINGS_CONNECTION); g_assert (proxy); /* Request the all the configuration of the Connection */ if (!dbus_g_proxy_call (proxy, "GetSettings", &error, G_TYPE_INVALID, DBUS_TYPE_G_MAP_OF_MAP_OF_VARIANT, &hash, G_TYPE_INVALID)) { g_warning ("Failed to get active connection Connection property: %s", error->message); g_error_free (error); goto out; } /* Using the raw configuration, create an NMConnection object for it. This * step also verifies that the data we got from the settings service is * valid. */ connection = nm_connection_new_from_hash (hash, &error); if (!connection) { g_warning ("Received invalid connection data: %s", error->message); g_error_free (error); goto out; } /* And finally dump all the configuration to stdout */ g_message ("%s => %s", service, path); nm_connection_dump (connection); out: if (connection) g_object_unref (connection); if (hash) g_hash_table_destroy (hash); g_object_unref (proxy); } static void get_active_connection_details (DBusGConnection *bus, const char *obj_path) { DBusGProxy *props_proxy; GValue path_value = { 0 }; GValue serv_value = { 0 }; GError *error = NULL; const char *path = NULL, *service = NULL; /* This function gets the backing Connection object that describes the * network configuration that the ActiveConnection object is actually using. * The ActiveConnection object contains the mapping between the configuration * and the actual network interfaces that are using that configuration. */ /* Create a D-Bus object proxy for the active connection object's properties */ props_proxy = dbus_g_proxy_new_for_name (bus, NM_DBUS_SERVICE, obj_path, DBUS_INTERFACE_PROPERTIES); g_assert (props_proxy); /* Get the object path of the Connection details */ if (!dbus_g_proxy_call (props_proxy, "Get", &error, G_TYPE_STRING, NM_DBUS_INTERFACE_ACTIVE_CONNECTION, G_TYPE_STRING, "Connection", G_TYPE_INVALID, G_TYPE_VALUE, &path_value, G_TYPE_INVALID)) { g_warning ("Failed to get active connection Connection property: %s", error->message); g_error_free (error); goto out; } if (!G_VALUE_HOLDS (&path_value, DBUS_TYPE_G_OBJECT_PATH)) { g_warning ("Unexpected type returned getting Connection property: %s", G_VALUE_TYPE_NAME (&path_value)); goto out; } path = g_value_get_boxed (&path_value); if (!path) { g_warning ("Missing connection path!"); goto out; } /* Get the service name of the D-Bus service that provides the Connection */ if (!dbus_g_proxy_call (props_proxy, "Get", &error, G_TYPE_STRING, NM_DBUS_INTERFACE_ACTIVE_CONNECTION, G_TYPE_STRING, "ServiceName", G_TYPE_INVALID, G_TYPE_VALUE, &serv_value, G_TYPE_INVALID)) { g_warning ("Failed to get active connection ServiceName property: %s", error->message); g_error_free (error); goto out; } if (!G_VALUE_HOLDS (&serv_value, G_TYPE_STRING)) { g_warning ("Unexpected type returned getting Connection property: %s", G_VALUE_TYPE_NAME (&serv_value)); goto out; } service = g_value_get_string (&serv_value); if (!service) { g_warning ("Missing connection service name!"); goto out; } /* Print out the actual connection details */ print_connection (bus, service, path); out: g_value_unset (&path_value); g_value_unset (&serv_value); g_object_unref (props_proxy); } static void get_active_connections (DBusGConnection *bus, DBusGProxy *proxy) { GError *error = NULL; GValue value = { 0 }; GPtrArray *paths = NULL; int i; /* Get the ActiveConnections property from the NM Manager object */ if (!dbus_g_proxy_call (proxy, "Get", &error, G_TYPE_STRING, NM_DBUS_INTERFACE, G_TYPE_STRING, "ActiveConnections", G_TYPE_INVALID, G_TYPE_VALUE, &value, G_TYPE_INVALID)) { g_warning ("Failed to get ActiveConnections property: %s", error->message); g_error_free (error); return; } /* Make sure the ActiveConnections property is the type we expect it to be */ if (!G_VALUE_HOLDS (&value, DBUS_TYPE_G_ARRAY_OF_OBJECT_PATH)) { g_warning ("Unexpected type returned getting ActiveConnections: %s", G_VALUE_TYPE_NAME (&value)); goto out; } /* Extract the active connections array from the GValue */ paths = g_value_get_boxed (&value); if (!paths) { g_warning ("Could not retrieve active connections property"); goto out; } /* And print out the details of each active connection */ for (i = 0; i < paths->len; i++) get_active_connection_details (bus, g_ptr_array_index (paths, i)); out: g_value_unset (&value); } int main (int argc, char *argv[]) { DBusGConnection *bus; DBusGProxy *props_proxy; /* Initialize GType system */ g_type_init (); /* Get system bus */ bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, NULL); /* Create a D-Bus proxy to get the object properties from the NM Manager * object. NM_DBUS_* defines are from NetworkManager.h. */ props_proxy = dbus_g_proxy_new_for_name (bus, NM_DBUS_SERVICE, NM_DBUS_PATH, DBUS_INTERFACE_PROPERTIES); g_assert (props_proxy); /* Get active connections */ get_active_connections (bus, props_proxy); g_object_unref (props_proxy); dbus_g_connection_unref (bus); return 0; }