/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2011 Red Hat, Inc.
 */

/*
 * The example shows how to add a new connection using libnm.  Contrast this
 * example with add-connection-gdbus.c, which is a bit lower level and talks
 * directly to NM using GDBus.  This example is simpler because libnm handles
 * much of the low-level stuff for you.
 *
 * Compile with:
 *   gcc -Wall add-connection-libnm.c -o add-connection-libnm `pkg-config --libs --cflags libnm`
 */

#include <glib.h>
#include <NetworkManager.h>

static void
added_cb(GObject *client, GAsyncResult *result, gpointer user_data)
{
    GMainLoop          *loop = user_data;
    NMRemoteConnection *remote;
    GError             *error = NULL;

    /* NM responded to our request; either handle the resulting error or
     * print out the object path of the connection we just added.
     */
    remote = nm_client_add_connection_finish(NM_CLIENT(client), result, &error);

    if (error) {
        g_print("Error adding connection: %s", error->message);
        g_error_free(error);
    } else {
        g_print("Added: %s\n", nm_connection_get_path(NM_CONNECTION(remote)));
        g_object_unref(remote);
    }

    /* Tell the mainloop we're done and we can quit now */
    g_main_loop_quit(loop);
}

static void
add_connection(NMClient *client, GMainLoop *loop, const char *con_name)
{
    NMConnection        *connection;
    NMSettingConnection *s_con;
    NMSettingWired      *s_wired;
    NMSettingIP4Config  *s_ip4;
    char                *uuid;

    /* Create a new connection object */
    connection = nm_simple_connection_new();

    /* Build up the 'connection' Setting */
    s_con = (NMSettingConnection *) nm_setting_connection_new();
    uuid  = nm_utils_uuid_generate();
    g_object_set(G_OBJECT(s_con),
                 NM_SETTING_CONNECTION_UUID,
                 uuid,
                 NM_SETTING_CONNECTION_ID,
                 con_name,
                 NM_SETTING_CONNECTION_TYPE,
                 "802-3-ethernet",
                 NULL);
    g_free(uuid);
    nm_connection_add_setting(connection, NM_SETTING(s_con));

    /* Build up the 'wired' Setting */
    s_wired = (NMSettingWired *) nm_setting_wired_new();
    nm_connection_add_setting(connection, NM_SETTING(s_wired));

    /* Build up the 'ipv4' Setting */
    s_ip4 = (NMSettingIP4Config *) nm_setting_ip4_config_new();
    g_object_set(G_OBJECT(s_ip4),
                 NM_SETTING_IP_CONFIG_METHOD,
                 NM_SETTING_IP4_CONFIG_METHOD_AUTO,
                 NULL);
    nm_connection_add_setting(connection, NM_SETTING(s_ip4));

    /* Ask the settings service to add the new connection; we'll quit the
     * mainloop and exit when the callback is called.
     */
    nm_client_add_connection_async(client, connection, TRUE, NULL, added_cb, loop);
    g_object_unref(connection);
}

int
main(int argc, char *argv[])
{
    NMClient  *client;
    GMainLoop *loop;
    GError    *error = NULL;

    loop = g_main_loop_new(NULL, FALSE);

    /* Connect to NetworkManager */
    client = nm_client_new(NULL, &error);
    if (!client) {
        g_message("Error: Could not connect to NetworkManager: %s.", error->message);
        g_error_free(error);
        return 1;
    }

    /* Ask NM to add the new connection */
    add_connection(client, loop, "__Test connection__");
    /* Wait for the connection to be added */
    g_main_loop_run(loop);

    /* Clean up */
    g_object_unref(client);

    return 0;
}