/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2007 - 2008 Novell, Inc.
 * Copyright (C) 2007 - 2008 Red Hat, Inc.
 */

#include "libnm-client-impl/nm-default-libnm.h"

#include "nm-vpn-plugin-old.h"

#include <signal.h>
#include <stdlib.h>

#include "nm-enum-types.h"
#include "nm-utils.h"
#include "nm-connection.h"
#include "nm-dbus-helpers.h"
#include "libnm-core-intern/nm-core-internal.h"
#include "nm-simple-connection.h"
#include "nm-vpn-service-plugin.h"

#include "introspection/org.freedesktop.NetworkManager.VPN.Plugin.h"

#define NM_VPN_PLUGIN_OLD_QUIT_TIMER 180

static void nm_vpn_plugin_old_initable_iface_init(GInitableIface *iface);

G_DEFINE_ABSTRACT_TYPE_WITH_CODE(NMVpnPluginOld,
                                 nm_vpn_plugin_old,
                                 G_TYPE_OBJECT,
                                 G_IMPLEMENT_INTERFACE(G_TYPE_INITABLE,
                                                       nm_vpn_plugin_old_initable_iface_init);)

typedef struct {
    NMVpnServiceState state;

    /* DBUS-y stuff */
    GDBusConnection *connection;
    NMDBusVpnPlugin *dbus_vpn_plugin_old;
    char *           dbus_service_name;

    /* Temporary stuff */
    guint    connect_timer;
    guint    quit_timer;
    guint    fail_stop_id;
    gboolean interactive;

    gboolean got_config;
    gboolean has_ip4, got_ip4;
    gboolean has_ip6, got_ip6;

    /* Config stuff copied from config to ip4config */
    GVariant *banner, *tundev, *gateway, *mtu;
} NMVpnPluginOldPrivate;

#define NM_VPN_PLUGIN_OLD_GET_PRIVATE(o) \
    (G_TYPE_INSTANCE_GET_PRIVATE((o), NM_TYPE_VPN_PLUGIN_OLD, NMVpnPluginOldPrivate))

enum {
    STATE_CHANGED,
    CONFIG,
    IP4_CONFIG,
    IP6_CONFIG,
    LOGIN_BANNER,
    FAILURE,
    QUIT,
    SECRETS_REQUIRED,

    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = {0};

NM_GOBJECT_PROPERTIES_DEFINE_BASE(PROP_DBUS_SERVICE_NAME, PROP_STATE, );

static GSList *active_plugins = NULL;

static void
nm_vpn_plugin_old_set_connection(NMVpnPluginOld *plugin, GDBusConnection *connection)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);

    g_clear_object(&priv->connection);

    if (connection)
        priv->connection = g_object_ref(connection);
}

/**
 * nm_vpn_plugin_old_get_connection:
 *
 * Returns: (transfer full):
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
GDBusConnection *
nm_vpn_plugin_old_get_connection(NMVpnPluginOld *plugin)
{
    GDBusConnection *connection;

    g_return_val_if_fail(NM_IS_VPN_PLUGIN_OLD(plugin), NULL);

    connection = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin)->connection;

    if (connection)
        g_object_ref(connection);

    return connection;
}

/**
 * nm_vpn_plugin_old_get_state:
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
NMVpnServiceState
nm_vpn_plugin_old_get_state(NMVpnPluginOld *plugin)
{
    g_return_val_if_fail(NM_IS_VPN_PLUGIN_OLD(plugin), NM_VPN_SERVICE_STATE_UNKNOWN);

    return NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin)->state;
}

/**
 * nm_vpn_plugin_old_set_state:
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
void
nm_vpn_plugin_old_set_state(NMVpnPluginOld *plugin, NMVpnServiceState state)
{
    NMVpnPluginOldPrivate *priv;

    g_return_if_fail(NM_IS_VPN_PLUGIN_OLD(plugin));

    priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);
    if (priv->state != state) {
        priv->state = state;
        g_signal_emit(plugin, signals[STATE_CHANGED], 0, state);
    }
}

/**
 * nm_vpn_plugin_old_set_login_banner:
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
void
nm_vpn_plugin_old_set_login_banner(NMVpnPluginOld *plugin, const char *banner)
{
    g_return_if_fail(NM_IS_VPN_PLUGIN_OLD(plugin));
    g_return_if_fail(banner != NULL);

    g_signal_emit(plugin, signals[LOGIN_BANNER], 0, banner);
}

/**
 * nm_vpn_plugin_old_failure:
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
void
nm_vpn_plugin_old_failure(NMVpnPluginOld *plugin, NMVpnPluginFailure reason)
{
    g_return_if_fail(NM_IS_VPN_PLUGIN_OLD(plugin));

    g_signal_emit(plugin, signals[FAILURE], 0, reason);
}

/**
 * nm_vpn_plugin_old_disconnect:
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
gboolean
nm_vpn_plugin_old_disconnect(NMVpnPluginOld *plugin, GError **err)
{
    gboolean          ret = FALSE;
    NMVpnServiceState state;

    g_return_val_if_fail(NM_IS_VPN_PLUGIN_OLD(plugin), FALSE);

    state = nm_vpn_plugin_old_get_state(plugin);
    switch (state) {
    case NM_VPN_SERVICE_STATE_STOPPING:
        g_set_error(
            err,
            NM_VPN_PLUGIN_ERROR,
            NM_VPN_PLUGIN_ERROR_STOPPING_IN_PROGRESS,
            "%s",
            "Could not process the request because the VPN connection is already being stopped.");
        break;
    case NM_VPN_SERVICE_STATE_STOPPED:
        g_set_error(err,
                    NM_VPN_PLUGIN_ERROR,
                    NM_VPN_PLUGIN_ERROR_ALREADY_STOPPED,
                    "%s",
                    "Could not process the request because no VPN connection was active.");
        break;
    case NM_VPN_SERVICE_STATE_STARTING:
    case NM_VPN_SERVICE_STATE_STARTED:
        nm_vpn_plugin_old_set_state(plugin, NM_VPN_SERVICE_STATE_STOPPING);
        ret = NM_VPN_PLUGIN_OLD_GET_CLASS(plugin)->disconnect(plugin, err);
        nm_vpn_plugin_old_set_state(plugin, NM_VPN_SERVICE_STATE_STOPPED);
        break;
    case NM_VPN_SERVICE_STATE_INIT:
        ret = TRUE;
        break;

    default:
        g_warning("Unhandled VPN service state %d", state);
        g_assert_not_reached();
        break;
    }

    return ret;
}

static void
nm_vpn_plugin_old_emit_quit(NMVpnPluginOld *plugin)
{
    g_signal_emit(plugin, signals[QUIT], 0);
}

static gboolean
connect_timer_expired(gpointer data)
{
    NMVpnPluginOld *plugin = NM_VPN_PLUGIN_OLD(data);
    GError *        err    = NULL;

    NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin)->connect_timer = 0;
    g_message("Connect timer expired, disconnecting.");
    nm_vpn_plugin_old_disconnect(plugin, &err);
    if (err) {
        g_warning("Disconnect failed: %s", err->message);
        g_error_free(err);
    }

    return G_SOURCE_REMOVE;
}

static gboolean
quit_timer_expired(gpointer data)
{
    NMVpnPluginOld *self = NM_VPN_PLUGIN_OLD(data);

    NM_VPN_PLUGIN_OLD_GET_PRIVATE(self)->quit_timer = 0;
    nm_vpn_plugin_old_emit_quit(self);
    return G_SOURCE_REMOVE;
}

static void
schedule_quit_timer(NMVpnPluginOld *self)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(self);

    nm_clear_g_source(&priv->quit_timer);
    priv->quit_timer =
        g_timeout_add_seconds(NM_VPN_PLUGIN_OLD_QUIT_TIMER, quit_timer_expired, self);
}

static gboolean
fail_stop(gpointer data)
{
    NMVpnPluginOld *self = NM_VPN_PLUGIN_OLD(data);

    NM_VPN_PLUGIN_OLD_GET_PRIVATE(self)->fail_stop_id = 0;
    nm_vpn_plugin_old_set_state(self, NM_VPN_SERVICE_STATE_STOPPED);
    return G_SOURCE_REMOVE;
}

static void
schedule_fail_stop(NMVpnPluginOld *plugin, guint timeout_secs)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);

    nm_clear_g_source(&priv->fail_stop_id);
    if (timeout_secs)
        priv->fail_stop_id = g_timeout_add_seconds(timeout_secs, fail_stop, plugin);
    else
        priv->fail_stop_id = g_idle_add(fail_stop, plugin);
}

/**
 * nm_vpn_plugin_old_set_config:
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
void
nm_vpn_plugin_old_set_config(NMVpnPluginOld *plugin, GVariant *config)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);

    g_return_if_fail(NM_IS_VPN_PLUGIN_OLD(plugin));
    g_return_if_fail(config != NULL);

    priv->got_config = TRUE;

    (void) g_variant_lookup(config, NM_VPN_PLUGIN_CONFIG_HAS_IP4, "b", &priv->has_ip4);
    (void) g_variant_lookup(config, NM_VPN_PLUGIN_CONFIG_HAS_IP6, "b", &priv->has_ip6);

    g_warn_if_fail(priv->has_ip4 || priv->has_ip6);

    /* Record the items that need to also be inserted into the
     * ip4config, for compatibility with older daemons.
     */
    if (priv->banner)
        g_variant_unref(priv->banner);
    priv->banner = g_variant_lookup_value(config, NM_VPN_PLUGIN_CONFIG_BANNER, G_VARIANT_TYPE("s"));
    if (priv->tundev)
        g_variant_unref(priv->tundev);
    priv->tundev = g_variant_lookup_value(config, NM_VPN_PLUGIN_CONFIG_TUNDEV, G_VARIANT_TYPE("s"));
    if (priv->gateway)
        g_variant_unref(priv->gateway);
    priv->gateway =
        g_variant_lookup_value(config, NM_VPN_PLUGIN_CONFIG_EXT_GATEWAY, G_VARIANT_TYPE("u"));
    if (priv->mtu)
        g_variant_unref(priv->mtu);
    priv->mtu = g_variant_lookup_value(config, NM_VPN_PLUGIN_CONFIG_MTU, G_VARIANT_TYPE("u"));

    g_signal_emit(plugin, signals[CONFIG], 0, config);
}

/**
 * nm_vpn_plugin_old_set_ip4_config:
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
void
nm_vpn_plugin_old_set_ip4_config(NMVpnPluginOld *plugin, GVariant *ip4_config)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);
    GVariant *             combined_config;
    GVariantBuilder        builder;
    GVariantIter           iter;
    const char *           key;
    GVariant *             value;

    g_return_if_fail(NM_IS_VPN_PLUGIN_OLD(plugin));
    g_return_if_fail(ip4_config != NULL);

    priv->got_ip4 = TRUE;

    /* Old plugins won't send the "config" signal and thus can't send
     * NM_VPN_PLUGIN_OLD_CONFIG_HAS_IP4 either.  But since they don't support IPv6,
     * we can safely assume that, if we don't receive a "config" signal but do
     * receive an "ip4-config" signal, the old plugin supports IPv4.
     */
    if (!priv->got_config)
        priv->has_ip4 = TRUE;

    /* Older NetworkManager daemons expect all config info to be in
     * the ip4 config, so they won't even notice the "config" signal
     * being emitted. So just copy all of that data into the ip4
     * config too.
     */
    g_variant_builder_init(&builder, G_VARIANT_TYPE("a{sv}"));
    g_variant_iter_init(&iter, ip4_config);
    while (g_variant_iter_next(&iter, "{&sv}", &key, &value)) {
        g_variant_builder_add(&builder, "{sv}", key, value);
        g_variant_unref(value);
    }

    if (priv->banner)
        g_variant_builder_add(&builder, "{sv}", NM_VPN_PLUGIN_IP4_CONFIG_BANNER, &priv->banner);
    if (priv->tundev)
        g_variant_builder_add(&builder, "{sv}", NM_VPN_PLUGIN_IP4_CONFIG_TUNDEV, &priv->tundev);
    if (priv->gateway)
        g_variant_builder_add(&builder,
                              "{sv}",
                              NM_VPN_PLUGIN_IP4_CONFIG_EXT_GATEWAY,
                              &priv->gateway);
    if (priv->mtu)
        g_variant_builder_add(&builder, "{sv}", NM_VPN_PLUGIN_IP4_CONFIG_MTU, &priv->mtu);

    combined_config = g_variant_builder_end(&builder);
    g_variant_ref_sink(combined_config);
    g_signal_emit(plugin, signals[IP4_CONFIG], 0, combined_config);
    g_variant_unref(combined_config);

    if (priv->has_ip4 == priv->got_ip4 && priv->has_ip6 == priv->got_ip6)
        nm_vpn_plugin_old_set_state(plugin, NM_VPN_SERVICE_STATE_STARTED);
}

/**
 * nm_vpn_plugin_old_set_ip6_config:
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
void
nm_vpn_plugin_old_set_ip6_config(NMVpnPluginOld *plugin, GVariant *ip6_config)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);

    g_return_if_fail(NM_IS_VPN_PLUGIN_OLD(plugin));
    g_return_if_fail(ip6_config != NULL);

    g_variant_ref_sink(ip6_config);

    priv->got_ip6 = TRUE;
    g_signal_emit(plugin, signals[IP6_CONFIG], 0, ip6_config);

    g_variant_unref(ip6_config);

    if (priv->has_ip4 == priv->got_ip4 && priv->has_ip6 == priv->got_ip6)
        nm_vpn_plugin_old_set_state(plugin, NM_VPN_SERVICE_STATE_STARTED);
}

static void
connect_timer_start(NMVpnPluginOld *plugin)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);

    priv->connect_timer = g_timeout_add_seconds(60, connect_timer_expired, plugin);
}

static void
_connect_generic(NMVpnPluginOld *       plugin,
                 GDBusMethodInvocation *context,
                 GVariant *             properties,
                 GVariant *             details)
{
    NMVpnPluginOldPrivate *priv              = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);
    NMVpnPluginOldClass *  vpn_class         = NM_VPN_PLUGIN_OLD_GET_CLASS(plugin);
    gs_unref_object NMConnection *connection = NULL;
    gboolean                      success    = FALSE;
    gs_free_error GError *error              = NULL;
    guint                 fail_stop_timeout  = 0;

    if (priv->state != NM_VPN_SERVICE_STATE_STOPPED && priv->state != NM_VPN_SERVICE_STATE_INIT) {
        g_dbus_method_invocation_return_error(context,
                                              NM_VPN_PLUGIN_ERROR,
                                              NM_VPN_PLUGIN_ERROR_WRONG_STATE,
                                              "Could not start connection: wrong plugin state %d",
                                              priv->state);
        return;
    }

    connection =
        _nm_simple_connection_new_from_dbus(properties, NM_SETTING_PARSE_FLAGS_BEST_EFFORT, &error);
    if (!connection) {
        g_dbus_method_invocation_return_error(context,
                                              NM_VPN_PLUGIN_ERROR,
                                              NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
                                              "Invalid connection: %s",
                                              error->message);
        return;
    }

    priv->interactive = FALSE;
    if (details && !vpn_class->connect_interactive) {
        g_dbus_method_invocation_return_error(context,
                                              NM_VPN_PLUGIN_ERROR,
                                              NM_VPN_PLUGIN_ERROR_INTERACTIVE_NOT_SUPPORTED,
                                              "Plugin does not implement ConnectInteractive()");
        return;
    }

    nm_clear_g_source(&priv->fail_stop_id);

    if (details) {
        priv->interactive = TRUE;
        success           = vpn_class->connect_interactive(plugin, connection, details, &error);
        if (g_error_matches(error,
                            NM_VPN_PLUGIN_ERROR,
                            NM_VPN_PLUGIN_ERROR_INTERACTIVE_NOT_SUPPORTED)) {
            /* Give NetworkManager a bit of time to fall back to Connect() */
            fail_stop_timeout = 5;
        }
    } else
        success = vpn_class->connect(plugin, connection, &error);

    if (success) {
        nm_vpn_plugin_old_set_state(plugin, NM_VPN_SERVICE_STATE_STARTING);

        g_dbus_method_invocation_return_value(context, NULL);

        /* Add a timer to make sure we do not wait indefinitely for the successful connect. */
        connect_timer_start(plugin);
    } else {
        g_dbus_method_invocation_take_error(context, g_steal_pointer(&error));

        /* Stop the plugin from an idle handler so that the Connect
         * method return gets sent before the STOP StateChanged signal.
         */
        schedule_fail_stop(plugin, fail_stop_timeout);
    }
}

static void
impl_vpn_plugin_old_connect(NMVpnPluginOld *       plugin,
                            GDBusMethodInvocation *context,
                            GVariant *             connection,
                            gpointer               user_data)
{
    _connect_generic(plugin, context, connection, NULL);
}

static void
impl_vpn_plugin_old_connect_interactive(NMVpnPluginOld *       plugin,
                                        GDBusMethodInvocation *context,
                                        GVariant *             connection,
                                        GVariant *             details,
                                        gpointer               user_data)
{
    _connect_generic(plugin, context, connection, details);
}

/*****************************************************************************/

static void
impl_vpn_plugin_old_need_secrets(NMVpnPluginOld *       plugin,
                                 GDBusMethodInvocation *context,
                                 GVariant *             properties,
                                 gpointer               user_data)
{
    NMConnection *connection;
    const char *  setting_name;
    gboolean      needed;
    GError *      error = NULL;

    connection =
        _nm_simple_connection_new_from_dbus(properties, NM_SETTING_PARSE_FLAGS_BEST_EFFORT, &error);
    if (!connection) {
        g_dbus_method_invocation_return_error(context,
                                              NM_VPN_PLUGIN_ERROR,
                                              NM_VPN_PLUGIN_ERROR_INVALID_CONNECTION,
                                              "The connection was invalid: %s",
                                              error->message);
        g_error_free(error);
        return;
    }

    if (!NM_VPN_PLUGIN_OLD_GET_CLASS(plugin)->need_secrets) {
        g_dbus_method_invocation_return_value(context, g_variant_new("(s)", ""));
        return;
    }

    needed = NM_VPN_PLUGIN_OLD_GET_CLASS(plugin)->need_secrets(plugin,
                                                               connection,
                                                               &setting_name,
                                                               &error);
    if (error) {
        g_dbus_method_invocation_take_error(context, error);
        return;
    }

    if (needed) {
        /* Push back the quit timer so the VPN plugin doesn't quit in the
         * middle of asking the user for secrets.
         */
        schedule_quit_timer(plugin);

        g_assert(setting_name);
        g_dbus_method_invocation_return_value(context, g_variant_new("(s)", setting_name));
    } else {
        /* No secrets required */
        g_dbus_method_invocation_return_value(context, g_variant_new("(s)", ""));
    }
}

static void
impl_vpn_plugin_old_new_secrets(NMVpnPluginOld *       plugin,
                                GDBusMethodInvocation *context,
                                GVariant *             properties,
                                gpointer               user_data)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);
    NMConnection *         connection;
    GError *               error = NULL;
    gboolean               success;

    if (priv->state != NM_VPN_SERVICE_STATE_STARTING) {
        g_dbus_method_invocation_return_error(context,
                                              NM_VPN_PLUGIN_ERROR,
                                              NM_VPN_PLUGIN_ERROR_WRONG_STATE,
                                              "Could not accept new secrets: wrong plugin state %d",
                                              priv->state);
        return;
    }

    connection =
        _nm_simple_connection_new_from_dbus(properties, NM_SETTING_PARSE_FLAGS_BEST_EFFORT, &error);
    if (!connection) {
        g_dbus_method_invocation_return_error(context,
                                              NM_VPN_PLUGIN_ERROR,
                                              NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
                                              "Invalid connection: %s",
                                              error->message);
        g_clear_error(&error);
        return;
    }

    if (!NM_VPN_PLUGIN_OLD_GET_CLASS(plugin)->new_secrets) {
        g_dbus_method_invocation_return_error(
            context,
            NM_VPN_PLUGIN_ERROR,
            NM_VPN_PLUGIN_ERROR_INTERACTIVE_NOT_SUPPORTED,
            "Could not accept new secrets: plugin cannot process interactive secrets");
        g_object_unref(connection);
        return;
    }

    success = NM_VPN_PLUGIN_OLD_GET_CLASS(plugin)->new_secrets(plugin, connection, &error);
    if (success) {
        g_dbus_method_invocation_return_value(context, NULL);

        /* Add a timer to make sure we do not wait indefinitely for the successful connect. */
        connect_timer_start(plugin);
    } else {
        g_dbus_method_invocation_take_error(context, error);

        /* Stop the plugin from and idle handler so that the NewSecrets
         * method return gets sent before the STOP StateChanged signal.
         */
        schedule_fail_stop(plugin, 0);
    }

    g_object_unref(connection);
}

/**
 * nm_vpn_plugin_old_secrets_required:
 * @plugin: the #NMVpnPluginOld
 * @message: an information message about why secrets are required, if any
 * @hints: VPN specific secret names for required new secrets
 *
 * Called by VPN plugin implementations to signal to NetworkManager that secrets
 * are required during the connection process.  This signal may be used to
 * request new secrets when the secrets originally provided by NetworkManager
 * are insufficient, or the VPN process indicates that it needs additional
 * information to complete the request.
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 */
void
nm_vpn_plugin_old_secrets_required(NMVpnPluginOld *plugin, const char *message, const char **hints)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);

    /* Plugin must be able to accept the new secrets if it calls this method */
    g_return_if_fail(NM_VPN_PLUGIN_OLD_GET_CLASS(plugin)->new_secrets);

    /* Plugin cannot call this method if NetworkManager didn't originally call
     * ConnectInteractive().
     */
    g_return_if_fail(priv->interactive == TRUE);

    /* Cancel the connect timer since secrets might take a while.  It'll
     * get restarted when the secrets come back via NewSecrets().
     */
    nm_clear_g_source(&priv->connect_timer);

    g_signal_emit(plugin, signals[SECRETS_REQUIRED], 0, message, hints);
}

/*****************************************************************************/

/**
 * nm_vpn_plugin_old_read_vpn_details:
 * @fd: file descriptor to read from, usually stdin (0)
 * @out_data: (out) (transfer full): on successful return, a hash table
 * (mapping char*:char*) containing the key/value pairs of VPN data items
 * @out_secrets: (out) (transfer full): on successful return, a hash table
 * (mapping char*:char*) containing the key/value pairsof VPN secrets
 *
 * Parses key/value pairs from a file descriptor (normally stdin) passed by
 * an applet when the applet calls the authentication dialog of the VPN plugin.
 *
 * Returns: %TRUE if reading values was successful, %FALSE if not
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 **/
gboolean
nm_vpn_plugin_old_read_vpn_details(int fd, GHashTable **out_data, GHashTable **out_secrets)
{
    return nm_vpn_service_plugin_read_vpn_details(fd, out_data, out_secrets);
}

/**
 * nm_vpn_plugin_old_get_secret_flags:
 * @data: hash table containing VPN key/value pair data items
 * @secret_name: VPN secret key name for which to retrieve flags for
 * @out_flags: (out): on success, the flags associated with @secret_name
 *
 * Given a VPN secret key name, attempts to find the corresponding flags data
 * item in @data.  If found, converts the flags data item to
 * #NMSettingSecretFlags and returns it.
 *
 * Returns: %TRUE if the flag data item was found and successfully converted
 * to flags, %FALSE if not
 *
 * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
 **/
gboolean
nm_vpn_plugin_old_get_secret_flags(GHashTable *          data,
                                   const char *          secret_name,
                                   NMSettingSecretFlags *out_flags)
{
    return nm_vpn_service_plugin_get_secret_flags(data, secret_name, out_flags);
}

/*****************************************************************************/

static void
impl_vpn_plugin_old_disconnect(NMVpnPluginOld *       plugin,
                               GDBusMethodInvocation *context,
                               gpointer               user_data)
{
    GError *error = NULL;

    if (nm_vpn_plugin_old_disconnect(plugin, &error))
        g_dbus_method_invocation_return_value(context, NULL);
    else
        g_dbus_method_invocation_take_error(context, error);
}

static void
impl_vpn_plugin_old_set_config(NMVpnPluginOld *       plugin,
                               GDBusMethodInvocation *context,
                               GVariant *             config,
                               gpointer               user_data)
{
    nm_vpn_plugin_old_set_config(plugin, config);
    g_dbus_method_invocation_return_value(context, NULL);
}

static void
impl_vpn_plugin_old_set_ip4_config(NMVpnPluginOld *       plugin,
                                   GDBusMethodInvocation *context,
                                   GVariant *             config,
                                   gpointer               user_data)
{
    nm_vpn_plugin_old_set_ip4_config(plugin, config);
    g_dbus_method_invocation_return_value(context, NULL);
}

static void
impl_vpn_plugin_old_set_ip6_config(NMVpnPluginOld *       plugin,
                                   GDBusMethodInvocation *context,
                                   GVariant *             config,
                                   gpointer               user_data)
{
    nm_vpn_plugin_old_set_ip6_config(plugin, config);
    g_dbus_method_invocation_return_value(context, NULL);
}

static void
impl_vpn_plugin_old_set_failure(NMVpnPluginOld *       plugin,
                                GDBusMethodInvocation *context,
                                char *                 reason,
                                gpointer               user_data)
{
    nm_vpn_plugin_old_failure(plugin, NM_VPN_PLUGIN_FAILURE_BAD_IP_CONFIG);
    g_dbus_method_invocation_return_value(context, NULL);
}

/*****************************************************************************/

static void
_emit_quit(gpointer data, gpointer user_data)
{
    NMVpnPluginOld *plugin = data;

    nm_vpn_plugin_old_emit_quit(plugin);
}

static void
sigterm_handler(int signum)
{
    g_slist_foreach(active_plugins, _emit_quit, NULL);
}

static void
setup_unix_signal_handler(void)
{
    struct sigaction action;
    sigset_t         block_mask;

    action.sa_handler = sigterm_handler;
    sigemptyset(&block_mask);
    action.sa_mask  = block_mask;
    action.sa_flags = 0;
    sigaction(SIGINT, &action, NULL);
    sigaction(SIGTERM, &action, NULL);
}

/*****************************************************************************/

static void
one_plugin_destroyed(gpointer data, GObject *object)
{
    active_plugins = g_slist_remove(active_plugins, object);
}

static void
nm_vpn_plugin_old_init(NMVpnPluginOld *plugin)
{
    active_plugins = g_slist_append(active_plugins, plugin);
    g_object_weak_ref(G_OBJECT(plugin), one_plugin_destroyed, NULL);
}

static gboolean
init_sync(GInitable *initable, GCancellable *cancellable, GError **error)
{
    NMVpnPluginOld *       plugin     = NM_VPN_PLUGIN_OLD(initable);
    NMVpnPluginOldPrivate *priv       = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);
    GDBusConnection *      connection = NULL;
    GDBusProxy *           proxy;
    GVariant *             ret;
    gboolean               success = FALSE;

    if (!priv->dbus_service_name) {
        g_set_error_literal(error,
                            NM_VPN_PLUGIN_ERROR,
                            NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
                            _("No service name specified"));
        return FALSE;
    }

    connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, error);
    if (!connection)
        return FALSE;

    proxy = g_dbus_proxy_new_sync(connection,
                                  G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES
                                      | G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS,
                                  NULL,
                                  DBUS_SERVICE_DBUS,
                                  DBUS_PATH_DBUS,
                                  DBUS_INTERFACE_DBUS,
                                  cancellable,
                                  error);
    if (!proxy)
        goto out;

    ret = g_dbus_proxy_call_sync(proxy,
                                 "RequestName",
                                 g_variant_new("(su)", priv->dbus_service_name, 0),
                                 G_DBUS_CALL_FLAGS_NONE,
                                 -1,
                                 cancellable,
                                 error);
    g_object_unref(proxy);
    if (!ret) {
        if (error && *error)
            g_dbus_error_strip_remote_error(*error);
        goto out;
    }
    g_variant_unref(ret);

    priv->dbus_vpn_plugin_old = nmdbus_vpn_plugin_skeleton_new();
    if (!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(priv->dbus_vpn_plugin_old),
                                          connection,
                                          NM_VPN_DBUS_PLUGIN_PATH,
                                          error))
        goto out;

    _nm_dbus_bind_properties(plugin, priv->dbus_vpn_plugin_old);
    _nm_dbus_bind_methods(plugin,
                          priv->dbus_vpn_plugin_old,
                          "Connect",
                          impl_vpn_plugin_old_connect,
                          "ConnectInteractive",
                          impl_vpn_plugin_old_connect_interactive,
                          "NeedSecrets",
                          impl_vpn_plugin_old_need_secrets,
                          "NewSecrets",
                          impl_vpn_plugin_old_new_secrets,
                          "Disconnect",
                          impl_vpn_plugin_old_disconnect,
                          "SetConfig",
                          impl_vpn_plugin_old_set_config,
                          "SetIp4Config",
                          impl_vpn_plugin_old_set_ip4_config,
                          "SetIp6Config",
                          impl_vpn_plugin_old_set_ip6_config,
                          "SetFailure",
                          impl_vpn_plugin_old_set_failure,
                          NULL);

    nm_vpn_plugin_old_set_connection(plugin, connection);
    nm_vpn_plugin_old_set_state(plugin, NM_VPN_SERVICE_STATE_INIT);

    success = TRUE;

out:
    g_clear_object(&connection);

    return success;
}

static void
set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(object);

    switch (prop_id) {
    case PROP_DBUS_SERVICE_NAME:
        /* construct-only */
        priv->dbus_service_name = g_value_dup_string(value);
        break;
    case PROP_STATE:
        nm_vpn_plugin_old_set_state(NM_VPN_PLUGIN_OLD(object),
                                    (NMVpnServiceState) g_value_get_enum(value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

static void
get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(object);

    switch (prop_id) {
    case PROP_DBUS_SERVICE_NAME:
        g_value_set_string(value, priv->dbus_service_name);
        break;
    case PROP_STATE:
        g_value_set_enum(value, nm_vpn_plugin_old_get_state(NM_VPN_PLUGIN_OLD(object)));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

static void
dispose(GObject *object)
{
    NMVpnPluginOld *       plugin = NM_VPN_PLUGIN_OLD(object);
    NMVpnPluginOldPrivate *priv   = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);
    NMVpnServiceState      state;
    GError *               err = NULL;

    nm_clear_g_source(&priv->fail_stop_id);
    nm_clear_g_source(&priv->quit_timer);
    nm_clear_g_source(&priv->connect_timer);

    state = nm_vpn_plugin_old_get_state(plugin);

    if (state == NM_VPN_SERVICE_STATE_STARTED || state == NM_VPN_SERVICE_STATE_STARTING)
        nm_vpn_plugin_old_disconnect(plugin, &err);

    if (err) {
        g_warning("Error disconnecting VPN connection: %s", err->message);
        g_error_free(err);
    }

    G_OBJECT_CLASS(nm_vpn_plugin_old_parent_class)->dispose(object);
}

static void
finalize(GObject *object)
{
    NMVpnPluginOld *       plugin = NM_VPN_PLUGIN_OLD(object);
    NMVpnPluginOldPrivate *priv   = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);

    nm_vpn_plugin_old_set_connection(plugin, NULL);
    g_free(priv->dbus_service_name);

    nm_clear_pointer(&priv->banner, g_variant_unref);
    nm_clear_pointer(&priv->tundev, g_variant_unref);
    nm_clear_pointer(&priv->gateway, g_variant_unref);
    nm_clear_pointer(&priv->mtu, g_variant_unref);

    G_OBJECT_CLASS(nm_vpn_plugin_old_parent_class)->finalize(object);
}

static void
state_changed(NMVpnPluginOld *plugin, NMVpnServiceState state)
{
    NMVpnPluginOldPrivate *priv = NM_VPN_PLUGIN_OLD_GET_PRIVATE(plugin);

    switch (state) {
    case NM_VPN_SERVICE_STATE_STARTING:
        nm_clear_g_source(&priv->quit_timer);
        nm_clear_g_source(&priv->fail_stop_id);
        break;
    case NM_VPN_SERVICE_STATE_STOPPED:
        schedule_quit_timer(plugin);
        break;
    default:
        /* Clean up all timers we might have set up. */
        nm_clear_g_source(&priv->connect_timer);
        nm_clear_g_source(&priv->quit_timer);
        nm_clear_g_source(&priv->fail_stop_id);
        break;
    }
}

static void
nm_vpn_plugin_old_class_init(NMVpnPluginOldClass *plugin_class)
{
    GObjectClass *object_class = G_OBJECT_CLASS(plugin_class);

    g_type_class_add_private(object_class, sizeof(NMVpnPluginOldPrivate));

    object_class->get_property = get_property;
    object_class->set_property = set_property;
    object_class->dispose      = dispose;
    object_class->finalize     = finalize;

    plugin_class->state_changed = state_changed;

    /**
     * NMVpnPluginOld:service-name:
     *
     * The D-Bus service name of this plugin.
     *
     * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
     */
    obj_properties[PROP_DBUS_SERVICE_NAME] =
        g_param_spec_string(NM_VPN_PLUGIN_OLD_DBUS_SERVICE_NAME,
                            "",
                            "",
                            NULL,
                            G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);

    /**
     * NMVpnPluginOld:state:
     *
     * The state of the plugin.
     *
     * Deprecated: 1.2: Replaced by NMVpnServicePlugin.
     */
    obj_properties[PROP_STATE] = g_param_spec_enum(NM_VPN_PLUGIN_OLD_STATE,
                                                   "",
                                                   "",
                                                   NM_TYPE_VPN_SERVICE_STATE,
                                                   NM_VPN_SERVICE_STATE_INIT,
                                                   G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    g_object_class_install_properties(object_class, _PROPERTY_ENUMS_LAST, obj_properties);

    signals[STATE_CHANGED] = g_signal_new("state-changed",
                                          G_OBJECT_CLASS_TYPE(object_class),
                                          G_SIGNAL_RUN_FIRST,
                                          G_STRUCT_OFFSET(NMVpnPluginOldClass, state_changed),
                                          NULL,
                                          NULL,
                                          NULL,
                                          G_TYPE_NONE,
                                          1,
                                          G_TYPE_UINT);

    signals[SECRETS_REQUIRED] = g_signal_new("secrets-required",
                                             G_OBJECT_CLASS_TYPE(object_class),
                                             G_SIGNAL_RUN_FIRST,
                                             0,
                                             NULL,
                                             NULL,
                                             NULL,
                                             G_TYPE_NONE,
                                             2,
                                             G_TYPE_STRING,
                                             G_TYPE_STRV);

    signals[CONFIG] = g_signal_new("config",
                                   G_OBJECT_CLASS_TYPE(object_class),
                                   G_SIGNAL_RUN_FIRST,
                                   G_STRUCT_OFFSET(NMVpnPluginOldClass, config),
                                   NULL,
                                   NULL,
                                   NULL,
                                   G_TYPE_NONE,
                                   1,
                                   G_TYPE_VARIANT);

    signals[IP4_CONFIG] = g_signal_new("ip4-config",
                                       G_OBJECT_CLASS_TYPE(object_class),
                                       G_SIGNAL_RUN_FIRST,
                                       G_STRUCT_OFFSET(NMVpnPluginOldClass, ip4_config),
                                       NULL,
                                       NULL,
                                       NULL,
                                       G_TYPE_NONE,
                                       1,
                                       G_TYPE_VARIANT);

    signals[IP6_CONFIG] = g_signal_new("ip6-config",
                                       G_OBJECT_CLASS_TYPE(object_class),
                                       G_SIGNAL_RUN_FIRST,
                                       G_STRUCT_OFFSET(NMVpnPluginOldClass, ip6_config),
                                       NULL,
                                       NULL,
                                       NULL,
                                       G_TYPE_NONE,
                                       1,
                                       G_TYPE_VARIANT);

    signals[LOGIN_BANNER] = g_signal_new("login-banner",
                                         G_OBJECT_CLASS_TYPE(object_class),
                                         G_SIGNAL_RUN_FIRST,
                                         G_STRUCT_OFFSET(NMVpnPluginOldClass, login_banner),
                                         NULL,
                                         NULL,
                                         NULL,
                                         G_TYPE_NONE,
                                         1,
                                         G_TYPE_STRING);

    signals[FAILURE] = g_signal_new("failure",
                                    G_OBJECT_CLASS_TYPE(object_class),
                                    G_SIGNAL_RUN_FIRST,
                                    G_STRUCT_OFFSET(NMVpnPluginOldClass, failure),
                                    NULL,
                                    NULL,
                                    NULL,
                                    G_TYPE_NONE,
                                    1,
                                    G_TYPE_UINT);

    signals[QUIT] = g_signal_new("quit",
                                 G_OBJECT_CLASS_TYPE(object_class),
                                 G_SIGNAL_RUN_FIRST,
                                 G_STRUCT_OFFSET(NMVpnPluginOldClass, quit),
                                 NULL,
                                 NULL,
                                 NULL,
                                 G_TYPE_NONE,
                                 0,
                                 G_TYPE_NONE);

    setup_unix_signal_handler();
}

static void
nm_vpn_plugin_old_initable_iface_init(GInitableIface *iface)
{
    iface->init = init_sync;
}
