diff options
Diffstat (limited to 'examples/C/glib/get-active-connections-dbus-glib.c')
| -rw-r--r-- | examples/C/glib/get-active-connections-dbus-glib.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/examples/C/glib/get-active-connections-dbus-glib.c b/examples/C/glib/get-active-connections-dbus-glib.c new file mode 100644 index 00000000..f27c44fb --- /dev/null +++ b/examples/C/glib/get-active-connections-dbus-glib.c @@ -0,0 +1,248 @@ +/* -*- 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-dbus-glib.c -o get-active-connections-dbus-glib + */ + +#include <glib.h> +#include <dbus/dbus-glib.h> + +#include <nm-connection.h> +#include <nm-setting-connection.h> +#include <nm-setting-wired.h> +#include <nm-setting-ip4-config.h> +#include <NetworkManager.h> +#include <nm-utils.h> + +#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; +} |