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/* -*- 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 -2014 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 libraries.
*
* Compile with:
* gcc -Wall `pkg-config --libs --cflags glib-2.0 dbus-glib-1 libnm` get-active-connections-dbus-glib.c -o get-active-connections-dbus-glib
*/
#include <stdio.h>
#include <glib.h>
#include <dbus/dbus-glib.h>
#include <NetworkManager.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 *path)
{
DBusGProxy *proxy;
GError *error = NULL;
GHashTable *hash = NULL;
NMConnection *connection = NULL;
/* This function asks NetworkManager for the details of the connection */
/* Create the D-Bus proxy so we can ask it for the connection configuration details. */
proxy = dbus_g_proxy_new_for_name (bus,
NM_DBUS_SERVICE,
path,
NM_DBUS_INTERFACE_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 NetworkManager are 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 */
printf ("%s <=> %s\n", nm_connection_get_id (connection), 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 = G_VALUE_INIT;
GError *error = NULL;
const char *path = 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;
}
/* Print out the actual connection details */
print_connection (bus, path);
out:
g_value_unset (&path_value);
g_object_unref (props_proxy);
}
static void
get_active_connections (DBusGConnection *bus, DBusGProxy *proxy)
{
GError *error = NULL;
GValue value = G_VALUE_INIT;
GPtrArray *paths = NULL;
const char *a_path;
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 for each active connection */
for (i = 0; i < paths->len; i++) {
a_path = g_ptr_array_index (paths, i);
printf ("Active connection path: %s\n", a_path);
get_active_connection_details (bus, a_path);
}
out:
g_value_unset (&value);
}
int main (int argc, char *argv[])
{
DBusGConnection *bus;
DBusGProxy *props_proxy;
#if !GLIB_CHECK_VERSION (2, 35, 0)
/* Initialize GType system */
g_type_init ();
#endif
/* 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 nm-dbus-interface.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;
}
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