/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2009 - 2011 Red Hat, Inc.
 */

#include "src/core/nm-default-daemon.h"

#include "nm-device-bt.h"

#include <stdio.h>
#include <linux/if_ether.h>

#include "nm-core-internal.h"
#include "nm-bluez-common.h"
#include "nm-bluez-manager.h"
#include "devices/nm-device-private.h"
#include "ppp/nm-ppp-manager.h"
#include "nm-setting-connection.h"
#include "nm-setting-bluetooth.h"
#include "nm-setting-cdma.h"
#include "nm-setting-gsm.h"
#include "nm-setting-serial.h"
#include "nm-setting-ppp.h"
#include "NetworkManagerUtils.h"
#include "settings/nm-settings-connection.h"
#include "nm-utils.h"
#include "nm-bt-error.h"
#include "nm-ip4-config.h"
#include "platform/nm-platform.h"

#include "devices/wwan/nm-modem-manager.h"
#include "devices/wwan/nm-modem.h"

#define _NMLOG_DEVICE_TYPE NMDeviceBt
#include "devices/nm-device-logging.h"

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

NM_GOBJECT_PROPERTIES_DEFINE(NMDeviceBt,
                             PROP_BT_BDADDR,
                             PROP_BT_BZ_MGR,
                             PROP_BT_CAPABILITIES,
                             PROP_BT_DBUS_PATH,
                             PROP_BT_NAME, );

enum {
    PPP_STATS,
    LAST_SIGNAL,
};

static guint signals[LAST_SIGNAL] = {0};

typedef struct {
    NMModemManager *modem_manager;

    NMBluezManager *bz_mgr;

    char *dbus_path;

    char *bdaddr;
    char *name;

    char *connect_rfcomm_iface;

    GSList *connect_modem_candidates;

    NMModem *modem;

    GCancellable *connect_bz_cancellable;

    gulong connect_watch_link_id;

    guint connect_watch_link_idle_id;

    guint connect_wait_modem_id;

    NMBluetoothCapabilities capabilities : 6;

    NMBluetoothCapabilities connect_bt_type : 6; /* BT type of the current connection */

    NMDeviceStageState stage1_bt_state : 3;
    NMDeviceStageState stage1_modem_prepare_state : 3;

    bool is_connected : 1;

    bool mm_running : 1;

} NMDeviceBtPrivate;

struct _NMDeviceBt {
    NMDevice          parent;
    NMDeviceBtPrivate _priv;
};

struct _NMDeviceBtClass {
    NMDeviceClass parent;
};

G_DEFINE_TYPE(NMDeviceBt, nm_device_bt, NM_TYPE_DEVICE)

#define NM_DEVICE_BT_GET_PRIVATE(self) _NM_GET_PRIVATE(self, NMDeviceBt, NM_IS_DEVICE_BT, NMDevice)

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

NMBluetoothCapabilities
nm_device_bt_get_capabilities(NMDeviceBt *self)
{
    g_return_val_if_fail(NM_IS_DEVICE_BT(self), NM_BT_CAPABILITY_NONE);

    return NM_DEVICE_BT_GET_PRIVATE(self)->capabilities;
}

static NMBluetoothCapabilities
get_connection_bt_type(NMConnection *connection)
{
    NMSettingBluetooth *s_bt;
    const char *        bt_type;

    s_bt = nm_connection_get_setting_bluetooth(connection);

    if (s_bt) {
        bt_type = nm_setting_bluetooth_get_connection_type(s_bt);
        if (bt_type) {
            if (nm_streq(bt_type, NM_SETTING_BLUETOOTH_TYPE_DUN))
                return NM_BT_CAPABILITY_DUN;
            else if (nm_streq(bt_type, NM_SETTING_BLUETOOTH_TYPE_PANU))
                return NM_BT_CAPABILITY_NAP;
        }
    }

    return NM_BT_CAPABILITY_NONE;
}

static gboolean
get_connection_bt_type_check(NMDeviceBt *             self,
                             NMConnection *           connection,
                             NMBluetoothCapabilities *out_bt_type,
                             GError **                error)
{
    NMBluetoothCapabilities bt_type;

    bt_type = get_connection_bt_type(connection);

    NM_SET_OUT(out_bt_type, bt_type);

    if (bt_type == NM_BT_CAPABILITY_NONE) {
        nm_utils_error_set_literal(error,
                                   NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY,
                                   "profile is not a PANU/DUN bluetooth type");
        return FALSE;
    }

    if (!NM_FLAGS_ALL(NM_DEVICE_BT_GET_PRIVATE(self)->capabilities, bt_type)) {
        nm_utils_error_set_literal(error,
                                   NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY,
                                   "device does not support bluetooth type");
        return FALSE;
    }

    return TRUE;
}

static NMDeviceCapabilities
get_generic_capabilities(NMDevice *device)
{
    return NM_DEVICE_CAP_IS_NON_KERNEL;
}

static gboolean
can_auto_connect(NMDevice *device, NMSettingsConnection *sett_conn, char **specific_object)
{
    NMDeviceBt *            self = NM_DEVICE_BT(device);
    NMDeviceBtPrivate *     priv = NM_DEVICE_BT_GET_PRIVATE(self);
    NMBluetoothCapabilities bt_type;

    nm_assert(!specific_object || !*specific_object);

    if (!NM_DEVICE_CLASS(nm_device_bt_parent_class)->can_auto_connect(device, sett_conn, NULL))
        return FALSE;

    if (!get_connection_bt_type_check(self,
                                      nm_settings_connection_get_connection(sett_conn),
                                      &bt_type,
                                      NULL))
        return FALSE;

    /* Can't auto-activate a DUN connection without ModemManager */
    if (bt_type == NM_BT_CAPABILITY_DUN && priv->mm_running == FALSE)
        return FALSE;

    return TRUE;
}

static gboolean
check_connection_compatible(NMDevice *device, NMConnection *connection, GError **error)
{
    NMDeviceBt *        self = NM_DEVICE_BT(device);
    NMDeviceBtPrivate * priv = NM_DEVICE_BT_GET_PRIVATE(self);
    NMSettingBluetooth *s_bt;
    const char *        bdaddr;

    if (!NM_DEVICE_CLASS(nm_device_bt_parent_class)
             ->check_connection_compatible(device, connection, error))
        return FALSE;

    if (!get_connection_bt_type_check(self, connection, NULL, error))
        return FALSE;

    s_bt = nm_connection_get_setting_bluetooth(connection);

    bdaddr = nm_setting_bluetooth_get_bdaddr(s_bt);
    if (!bdaddr) {
        nm_utils_error_set_literal(error,
                                   NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY,
                                   "profile lacks bdaddr setting");
        return FALSE;
    }
    if (!nm_utils_hwaddr_matches(priv->bdaddr, -1, bdaddr, -1)) {
        nm_utils_error_set_literal(error,
                                   NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY,
                                   "devices bdaddr setting mismatches");
        return FALSE;
    }

    return TRUE;
}

static gboolean
check_connection_available(NMDevice *                     device,
                           NMConnection *                 connection,
                           NMDeviceCheckConAvailableFlags flags,
                           const char *                   specific_object,
                           GError **                      error)
{
    NMDeviceBt *            self = NM_DEVICE_BT(device);
    NMDeviceBtPrivate *     priv = NM_DEVICE_BT_GET_PRIVATE(self);
    NMBluetoothCapabilities bt_type;

    if (!get_connection_bt_type_check(self, connection, &bt_type, error))
        return FALSE;

    if (bt_type == NM_BT_CAPABILITY_DUN && !priv->mm_running) {
        nm_utils_error_set_literal(error,
                                   NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY,
                                   "ModemManager missing for DUN profile");
        return FALSE;
    }

    return TRUE;
}

static gboolean
complete_connection(NMDevice *           device,
                    NMConnection *       connection,
                    const char *         specific_object,
                    NMConnection *const *existing_connections,
                    GError **            error)
{
    NMDeviceBtPrivate * priv = NM_DEVICE_BT_GET_PRIVATE(device);
    NMSettingBluetooth *s_bt;
    const char *        setting_bdaddr;
    const char *        ctype;
    gboolean            is_dun = FALSE;
    gboolean            is_pan = FALSE;
    NMSettingGsm *      s_gsm;
    NMSettingCdma *     s_cdma;
    NMSettingSerial *   s_serial;
    NMSettingPpp *      s_ppp;
    const char *        fallback_prefix = NULL, *preferred = NULL;

    s_gsm    = nm_connection_get_setting_gsm(connection);
    s_cdma   = nm_connection_get_setting_cdma(connection);
    s_serial = nm_connection_get_setting_serial(connection);
    s_ppp    = nm_connection_get_setting_ppp(connection);

    s_bt = nm_connection_get_setting_bluetooth(connection);
    if (!s_bt) {
        s_bt = (NMSettingBluetooth *) nm_setting_bluetooth_new();
        nm_connection_add_setting(connection, NM_SETTING(s_bt));
    }

    ctype = nm_setting_bluetooth_get_connection_type(s_bt);
    if (ctype) {
        if (!strcmp(ctype, NM_SETTING_BLUETOOTH_TYPE_DUN))
            is_dun = TRUE;
        else if (!strcmp(ctype, NM_SETTING_BLUETOOTH_TYPE_PANU))
            is_pan = TRUE;
    } else {
        if (s_gsm || s_cdma)
            is_dun = TRUE;
        else if (priv->capabilities & NM_BT_CAPABILITY_NAP)
            is_pan = TRUE;
    }

    if (is_pan) {
        /* Make sure the device supports PAN */
        if (!(priv->capabilities & NM_BT_CAPABILITY_NAP)) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("PAN requested, but Bluetooth device does not support NAP"));
            g_prefix_error(error,
                           "%s.%s: ",
                           NM_SETTING_BLUETOOTH_SETTING_NAME,
                           NM_SETTING_BLUETOOTH_TYPE);
            return FALSE;
        }

        /* PAN can't use any DUN-related settings */
        if (s_gsm || s_cdma || s_serial || s_ppp) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_SETTING,
                                _("PAN connections cannot specify GSM, CDMA, or serial settings"));
            g_prefix_error(error,
                           "%s: ",
                           s_gsm      ? NM_SETTING_GSM_SETTING_NAME
                           : s_cdma   ? NM_SETTING_CDMA_SETTING_NAME
                           : s_serial ? NM_SETTING_SERIAL_SETTING_NAME
                                      : NM_SETTING_PPP_SETTING_NAME);
            return FALSE;
        }

        g_object_set(G_OBJECT(s_bt),
                     NM_SETTING_BLUETOOTH_TYPE,
                     NM_SETTING_BLUETOOTH_TYPE_PANU,
                     NULL);

        fallback_prefix = _("PAN connection");
    } else if (is_dun) {
        /* Make sure the device supports PAN */
        if (!(priv->capabilities & NM_BT_CAPABILITY_DUN)) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("DUN requested, but Bluetooth device does not support DUN"));
            g_prefix_error(error,
                           "%s.%s: ",
                           NM_SETTING_BLUETOOTH_SETTING_NAME,
                           NM_SETTING_BLUETOOTH_TYPE);
            return FALSE;
        }

        /* Need at least a GSM or a CDMA setting */
        if (!s_gsm && !s_cdma) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_SETTING,
                                _("DUN connection must include a GSM or CDMA setting"));
            g_prefix_error(error, "%s: ", NM_SETTING_BLUETOOTH_SETTING_NAME);
            return FALSE;
        }

        g_object_set(G_OBJECT(s_bt),
                     NM_SETTING_BLUETOOTH_TYPE,
                     NM_SETTING_BLUETOOTH_TYPE_DUN,
                     NULL);

        if (s_gsm) {
            fallback_prefix = _("GSM connection");
        } else {
            fallback_prefix = _("CDMA connection");
            if (!nm_setting_cdma_get_number(s_cdma))
                g_object_set(G_OBJECT(s_cdma), NM_SETTING_CDMA_NUMBER, "#777", NULL);
        }
    } else {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("Unknown/unhandled Bluetooth connection type"));
        g_prefix_error(error,
                       "%s.%s: ",
                       NM_SETTING_BLUETOOTH_SETTING_NAME,
                       NM_SETTING_BLUETOOTH_TYPE);
        return FALSE;
    }

    nm_utils_complete_generic(nm_device_get_platform(device),
                              connection,
                              NM_SETTING_BLUETOOTH_SETTING_NAME,
                              existing_connections,
                              preferred,
                              fallback_prefix,
                              NULL,
                              NULL,
                              is_dun ? FALSE : TRUE); /* No IPv6 yet for DUN */

    setting_bdaddr = nm_setting_bluetooth_get_bdaddr(s_bt);
    if (setting_bdaddr) {
        /* Make sure the setting BT Address (if any) matches the device's */
        if (!nm_utils_hwaddr_matches(setting_bdaddr, -1, priv->bdaddr, -1)) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("connection does not match device"));
            g_prefix_error(error,
                           "%s.%s: ",
                           NM_SETTING_BLUETOOTH_SETTING_NAME,
                           NM_SETTING_BLUETOOTH_BDADDR);
            return FALSE;
        }
    } else {
        /* Lock the connection to this device by default */
        if (!nm_utils_hwaddr_matches(priv->bdaddr, -1, NULL, ETH_ALEN))
            g_object_set(G_OBJECT(s_bt), NM_SETTING_BLUETOOTH_BDADDR, priv->bdaddr, NULL);
    }

    return TRUE;
}

/*****************************************************************************/
/* IP method PPP */

static void
ppp_stats(NMModem *modem, guint i_in_bytes, guint i_out_bytes, gpointer user_data)
{
    guint32 in_bytes  = i_in_bytes;
    guint32 out_bytes = i_out_bytes;

    g_signal_emit(NM_DEVICE_BT(user_data),
                  signals[PPP_STATS],
                  0,
                  (guint) in_bytes,
                  (guint) out_bytes);
}

static void
ppp_failed(NMModem *modem, guint i_reason, gpointer user_data)
{
    NMDevice *          device = NM_DEVICE(user_data);
    NMDeviceBt *        self   = NM_DEVICE_BT(user_data);
    NMDeviceStateReason reason = i_reason;

    switch (nm_device_get_state(device)) {
    case NM_DEVICE_STATE_PREPARE:
    case NM_DEVICE_STATE_CONFIG:
    case NM_DEVICE_STATE_NEED_AUTH:
        nm_device_state_changed(device, NM_DEVICE_STATE_FAILED, reason);
        break;
    case NM_DEVICE_STATE_IP_CONFIG:
    case NM_DEVICE_STATE_IP_CHECK:
    case NM_DEVICE_STATE_SECONDARIES:
    case NM_DEVICE_STATE_ACTIVATED:
        if (nm_device_activate_ip4_state_in_conf(device))
            nm_device_activate_schedule_ip_config_timeout(device, AF_INET);
        else if (nm_device_activate_ip6_state_in_conf(device))
            nm_device_activate_schedule_ip_config_timeout(device, AF_INET6);
        else if (nm_device_activate_ip4_state_done(device)) {
            nm_device_ip_method_failed(device,
                                       AF_INET,
                                       NM_DEVICE_STATE_REASON_IP_CONFIG_UNAVAILABLE);
        } else if (nm_device_activate_ip6_state_done(device)) {
            nm_device_ip_method_failed(device,
                                       AF_INET6,
                                       NM_DEVICE_STATE_REASON_IP_CONFIG_UNAVAILABLE);
        } else {
            _LOGW(LOGD_MB,
                  "PPP failure in unexpected state %u",
                  (guint) nm_device_get_state(device));
            nm_device_state_changed(device,
                                    NM_DEVICE_STATE_FAILED,
                                    NM_DEVICE_STATE_REASON_IP_CONFIG_UNAVAILABLE);
        }
        break;
    default:
        break;
    }
}

static void
modem_auth_requested(NMModem *modem, gpointer user_data)
{
    NMDevice *device = NM_DEVICE(user_data);

    /* Auth requests (PIN, PAP/CHAP passwords, etc) only get handled
     * during activation.
     */
    if (!nm_device_is_activating(device))
        return;

    nm_device_state_changed(device, NM_DEVICE_STATE_NEED_AUTH, NM_DEVICE_STATE_REASON_NONE);
}

static void
modem_auth_result(NMModem *modem, GError *error, gpointer user_data)
{
    NMDevice *         device = NM_DEVICE(user_data);
    NMDeviceBtPrivate *priv   = NM_DEVICE_BT_GET_PRIVATE(device);

    g_return_if_fail(nm_device_get_state(device) == NM_DEVICE_STATE_NEED_AUTH);

    if (error) {
        nm_device_state_changed(device, NM_DEVICE_STATE_FAILED, NM_DEVICE_STATE_REASON_NO_SECRETS);
        return;
    }

    priv->stage1_modem_prepare_state = NM_DEVICE_STAGE_STATE_INIT;
    nm_device_activate_schedule_stage1_device_prepare(device, FALSE);
}

static void
modem_prepare_result(NMModem *modem, gboolean success, guint i_reason, gpointer user_data)
{
    NMDeviceBt *        self   = user_data;
    NMDeviceBtPrivate * priv   = NM_DEVICE_BT_GET_PRIVATE(self);
    NMDeviceStateReason reason = i_reason;
    NMDeviceState       state;

    state = nm_device_get_state(NM_DEVICE(self));

    g_return_if_fail(NM_IN_SET(state, NM_DEVICE_STATE_PREPARE, NM_DEVICE_STATE_NEED_AUTH));

    nm_assert(priv->stage1_modem_prepare_state == NM_DEVICE_STAGE_STATE_PENDING);

    if (!success) {
        if (nm_device_state_reason_check(reason) == NM_DEVICE_STATE_REASON_SIM_PIN_INCORRECT) {
            /* If the connect failed because the SIM PIN was wrong don't allow
             * the device to be auto-activated anymore, which would risk locking
             * the SIM if the incorrect PIN continues to be used.
             */
            nm_device_autoconnect_blocked_set(NM_DEVICE(self),
                                              NM_DEVICE_AUTOCONNECT_BLOCKED_WRONG_PIN);
        }

        nm_device_state_changed(NM_DEVICE(self), NM_DEVICE_STATE_FAILED, reason);
        return;
    }

    priv->stage1_modem_prepare_state = NM_DEVICE_STAGE_STATE_COMPLETED;
    nm_device_activate_schedule_stage1_device_prepare(NM_DEVICE(self), FALSE);
}

static void
device_state_changed(NMDevice *          device,
                     NMDeviceState       new_state,
                     NMDeviceState       old_state,
                     NMDeviceStateReason reason)
{
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(device);

    if (priv->modem)
        nm_modem_device_state_changed(priv->modem, new_state, old_state);

    /* Need to recheck available connections whenever MM appears or disappears,
     * since the device could be both DUN and NAP capable and thus may not
     * change state (which rechecks available connections) when MM comes and goes.
     */
    if (priv->mm_running && NM_FLAGS_HAS(priv->capabilities, NM_BT_CAPABILITY_DUN))
        nm_device_recheck_available_connections(device);
}

static void
modem_ip4_config_result(NMModem *modem, NMIP4Config *config, GError *error, gpointer user_data)
{
    NMDeviceBt *self   = NM_DEVICE_BT(user_data);
    NMDevice *  device = NM_DEVICE(self);

    g_return_if_fail(nm_device_activate_ip4_state_in_conf(device) == TRUE);

    if (error) {
        _LOGW(LOGD_MB | LOGD_IP4 | LOGD_BT,
              "retrieving IP4 configuration failed: %s",
              error->message);
        nm_device_ip_method_failed(device, AF_INET, NM_DEVICE_STATE_REASON_IP_CONFIG_UNAVAILABLE);
        return;
    }

    nm_device_activate_schedule_ip_config_result(device, AF_INET, NM_IP_CONFIG_CAST(config));
}

static void
ip_ifindex_changed_cb(NMModem *modem, GParamSpec *pspec, gpointer user_data)
{
    NMDevice *device = NM_DEVICE(user_data);

    if (!nm_device_is_activating(device))
        return;

    if (!nm_device_set_ip_ifindex(device, nm_modem_get_ip_ifindex(modem))) {
        nm_device_state_changed(device,
                                NM_DEVICE_STATE_FAILED,
                                NM_DEVICE_STATE_REASON_IP_CONFIG_UNAVAILABLE);
    }
}

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

static void
modem_cleanup(NMDeviceBt *self)
{
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);

    if (priv->modem) {
        g_signal_handlers_disconnect_matched(priv->modem,
                                             G_SIGNAL_MATCH_DATA,
                                             0,
                                             0,
                                             NULL,
                                             NULL,
                                             self);
        nm_clear_pointer(&priv->modem, nm_modem_unclaim);
    }
}

static void
modem_state_cb(NMModem *modem, int new_state_i, int old_state_i, gpointer user_data)
{
    NMModemState  new_state = new_state_i;
    NMModemState  old_state = old_state_i;
    NMDevice *    device    = NM_DEVICE(user_data);
    NMDeviceState dev_state = nm_device_get_state(device);

    if (new_state <= NM_MODEM_STATE_DISABLING && old_state > NM_MODEM_STATE_DISABLING) {
        /* Will be called whenever something external to NM disables the
         * modem directly through ModemManager.
         */
        if (nm_device_is_activating(device) || dev_state == NM_DEVICE_STATE_ACTIVATED) {
            nm_device_state_changed(device,
                                    NM_DEVICE_STATE_DISCONNECTED,
                                    NM_DEVICE_STATE_REASON_USER_REQUESTED);
            return;
        }
    }

    if (new_state < NM_MODEM_STATE_CONNECTING && old_state >= NM_MODEM_STATE_CONNECTING
        && dev_state >= NM_DEVICE_STATE_NEED_AUTH && dev_state <= NM_DEVICE_STATE_ACTIVATED) {
        /* Fail the device if the modem disconnects unexpectedly while the
         * device is activating/activated. */
        nm_device_state_changed(device,
                                NM_DEVICE_STATE_FAILED,
                                NM_DEVICE_STATE_REASON_MODEM_NO_CARRIER);
        return;
    }
}

static void
modem_removed_cb(NMModem *modem, gpointer user_data)
{
    NMDeviceBt *  self = NM_DEVICE_BT(user_data);
    NMDeviceState state;

    state = nm_device_get_state(NM_DEVICE(self));
    if (nm_device_is_activating(NM_DEVICE(self)) || state == NM_DEVICE_STATE_ACTIVATED) {
        nm_device_state_changed(NM_DEVICE(self),
                                NM_DEVICE_STATE_FAILED,
                                NM_DEVICE_STATE_REASON_BT_FAILED);
        return;
    }

    modem_cleanup(self);
}

static gboolean
modem_try_claim(NMDeviceBt *self, NMModem *modem)
{
    NMDeviceBtPrivate *priv             = NM_DEVICE_BT_GET_PRIVATE(self);
    gs_free char *     rfcomm_base_name = NULL;
    NMDeviceState      state;

    if (priv->modem) {
        if (priv->modem == modem)
            return TRUE;
        return FALSE;
    }

    if (nm_modem_is_claimed(modem))
        return FALSE;

    if (!priv->connect_rfcomm_iface)
        return FALSE;

    rfcomm_base_name = g_path_get_basename(priv->connect_rfcomm_iface);
    if (!nm_streq0(rfcomm_base_name, nm_modem_get_control_port(modem)))
        return FALSE;

    /* Can only accept the modem in stage1, but since the interface matched
     * what we were expecting, don't let anything else claim the modem either.
     */
    state = nm_device_get_state(NM_DEVICE(self));
    if (state != NM_DEVICE_STATE_PREPARE) {
        _LOGD(LOGD_BT | LOGD_MB,
              "modem found but device not in correct state (%d)",
              nm_device_get_state(NM_DEVICE(self)));
        return FALSE;
    }

    priv->modem                      = nm_modem_claim(modem);
    priv->stage1_modem_prepare_state = NM_DEVICE_STAGE_STATE_INIT;

    g_signal_connect(modem, NM_MODEM_PPP_STATS, G_CALLBACK(ppp_stats), self);
    g_signal_connect(modem, NM_MODEM_PPP_FAILED, G_CALLBACK(ppp_failed), self);
    g_signal_connect(modem, NM_MODEM_PREPARE_RESULT, G_CALLBACK(modem_prepare_result), self);
    g_signal_connect(modem, NM_MODEM_IP4_CONFIG_RESULT, G_CALLBACK(modem_ip4_config_result), self);
    g_signal_connect(modem, NM_MODEM_AUTH_REQUESTED, G_CALLBACK(modem_auth_requested), self);
    g_signal_connect(modem, NM_MODEM_AUTH_RESULT, G_CALLBACK(modem_auth_result), self);
    g_signal_connect(modem, NM_MODEM_STATE_CHANGED, G_CALLBACK(modem_state_cb), self);
    g_signal_connect(modem, NM_MODEM_REMOVED, G_CALLBACK(modem_removed_cb), self);
    g_signal_connect(modem,
                     "notify::" NM_MODEM_IP_IFINDEX,
                     G_CALLBACK(ip_ifindex_changed_cb),
                     self);

    _LOGD(LOGD_BT | LOGD_MB, "modem found");

    return TRUE;
}

static void
mm_modem_added_cb(NMModemManager *manager, NMModem *modem, gpointer user_data)
{
    NMDeviceBt *       self = user_data;
    NMDeviceBtPrivate *priv;

    if (!modem_try_claim(user_data, modem))
        return;

    priv = NM_DEVICE_BT_GET_PRIVATE(self);

    if (priv->stage1_bt_state == NM_DEVICE_STAGE_STATE_COMPLETED)
        nm_device_activate_schedule_stage1_device_prepare(NM_DEVICE(self), FALSE);
}

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

void
_nm_device_bt_notify_set_connected(NMDeviceBt *self, gboolean connected)
{
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);

    connected = !!connected;
    if (priv->is_connected == connected)
        return;

    priv->is_connected = connected;

    if (connected || priv->stage1_bt_state != NM_DEVICE_STAGE_STATE_COMPLETED
        || nm_device_get_state(NM_DEVICE(self)) > NM_DEVICE_STATE_ACTIVATED) {
        _LOGT(LOGD_BT, "set-connected: %d", connected);
        return;
    }

    _LOGT(LOGD_BT, "set-connected: %d (disconnecting device...)", connected);
    nm_device_state_changed(NM_DEVICE(self),
                            NM_DEVICE_STATE_FAILED,
                            NM_DEVICE_STATE_REASON_CARRIER);
}

static gboolean
connect_watch_link_idle_cb(gpointer user_data)
{
    NMDeviceBt *       self = user_data;
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);
    int                ifindex;

    priv->connect_watch_link_idle_id = 0;

    if (nm_device_get_state(NM_DEVICE(self)) <= NM_DEVICE_STATE_ACTIVATED) {
        ifindex = nm_device_get_ip_ifindex(NM_DEVICE(self));
        if (ifindex > 0
            && !nm_platform_link_get(nm_device_get_platform(NM_DEVICE(self)), ifindex)) {
            _LOGT(LOGD_BT, "device disappeared");
            nm_device_state_changed(NM_DEVICE(self),
                                    NM_DEVICE_STATE_FAILED,
                                    NM_DEVICE_STATE_REASON_BT_FAILED);
        }
    }

    return G_SOURCE_REMOVE;
}

static void
connect_watch_link_cb(NMPlatform *    platform,
                      int             obj_type_i,
                      int             ifindex,
                      NMPlatformLink *info,
                      int             change_type_i,
                      NMDevice *      self)
{
    const NMPlatformSignalChangeType change_type = change_type_i;
    NMDeviceBtPrivate *              priv;

    /* bluez doesn't notify us when the connection disconnects.
     * Neither does NMManager (or NMDevice) tell us when the ip-ifindex goes away.
     * This is horrible, and should be improved. For now, watch the link ourself... */

    if (NM_IN_SET(change_type, NM_PLATFORM_SIGNAL_CHANGED, NM_PLATFORM_SIGNAL_REMOVED)) {
        priv = NM_DEVICE_BT_GET_PRIVATE(self);
        if (priv->connect_watch_link_idle_id == 0)
            priv->connect_watch_link_idle_id = g_idle_add(connect_watch_link_idle_cb, self);
    }
}

static gboolean
connect_wait_modem_timeout(gpointer user_data)
{
    NMDeviceBt *       self = NM_DEVICE_BT(user_data);
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);

    /* since this timeout is longer than the connect timeout, we must have already
     * hit the connect-timeout first or being connected. */
    nm_assert(priv->stage1_bt_state == NM_DEVICE_STAGE_STATE_COMPLETED);

    priv->connect_wait_modem_id = 0;
    nm_clear_g_cancellable(&priv->connect_bz_cancellable);

    if (priv->modem)
        _LOGD(LOGD_BT, "timeout connecting modem for DUN connection");
    else
        _LOGD(LOGD_BT, "timeout finding modem for DUN connection");

    nm_device_state_changed(NM_DEVICE(self),
                            NM_DEVICE_STATE_FAILED,
                            NM_DEVICE_STATE_REASON_MODEM_NOT_FOUND);
    return G_SOURCE_REMOVE;
}

static void
connect_bz_cb(NMBluezManager *bz_mgr,
              gboolean        is_complete,
              const char *    device_name,
              GError *        error,
              gpointer        user_data)
{
    NMDeviceBt *       self;
    NMDeviceBtPrivate *priv;
    char               sbuf[100];

    if (nm_utils_error_is_cancelled(error))
        return;

    self = user_data;
    priv = NM_DEVICE_BT_GET_PRIVATE(self);

    nm_assert(nm_device_is_activating(NM_DEVICE(self)));
    nm_assert(NM_IN_SET((NMBluetoothCapabilities) priv->connect_bt_type,
                        NM_BT_CAPABILITY_DUN,
                        NM_BT_CAPABILITY_NAP));

    if (!is_complete) {
        nm_assert(priv->connect_bt_type == NM_BT_CAPABILITY_DUN);
        nm_assert(device_name);
        nm_assert(!error);

        if (!nm_streq0(priv->connect_rfcomm_iface, device_name)) {
            nm_assert(!priv->connect_rfcomm_iface);
            _LOGD(LOGD_BT,
                  "DUN is still connecting but got serial port \"%s\" to claim modem",
                  device_name);
            g_free(priv->connect_rfcomm_iface);
            priv->connect_rfcomm_iface = g_strdup(device_name);
        }
        return;
    }

    g_clear_object(&priv->connect_bz_cancellable);

    if (!device_name) {
        _LOGW(LOGD_BT,
              "%s connect request failed: %s",
              nm_bluetooth_capability_to_string(priv->connect_bt_type, sbuf, sizeof(sbuf)),
              error->message);
        nm_device_state_changed(NM_DEVICE(self),
                                NM_DEVICE_STATE_FAILED,
                                NM_DEVICE_STATE_REASON_BT_FAILED);
        return;
    }

    _LOGD(LOGD_BT,
          "%s connect request successful (%s)",
          nm_bluetooth_capability_to_string(priv->connect_bt_type, sbuf, sizeof(sbuf)),
          device_name);

    if (priv->connect_bt_type == NM_BT_CAPABILITY_DUN) {
        if (!nm_streq0(priv->connect_rfcomm_iface, device_name)) {
            nm_assert_not_reached();
            g_free(priv->connect_rfcomm_iface);
            priv->connect_rfcomm_iface = g_strdup(device_name);
        }
    } else {
        nm_assert(priv->connect_bt_type == NM_BT_CAPABILITY_NAP);
        if (!nm_device_set_ip_iface(NM_DEVICE(self), device_name)) {
            _LOGW(LOGD_BT, "Error connecting with bluez: cannot find device %s", device_name);
            nm_device_state_changed(NM_DEVICE(self),
                                    NM_DEVICE_STATE_FAILED,
                                    NM_DEVICE_STATE_REASON_BT_FAILED);
            return;
        }
        priv->connect_watch_link_id = g_signal_connect(nm_device_get_platform(NM_DEVICE(self)),
                                                       NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                                       G_CALLBACK(connect_watch_link_cb),
                                                       self);
    }

    if (!priv->is_connected) {
        /* we got the callback from NMBluezManager with success. We actually should be
         * connected and this line shouldn't be reached. */
        nm_assert_not_reached();
        _LOGE(LOGD_BT, "bluetooth is unexpectedly not in connected state");
        nm_device_state_changed(NM_DEVICE(self),
                                NM_DEVICE_STATE_FAILED,
                                NM_DEVICE_STATE_REASON_BT_FAILED);
        return;
    }

    priv->stage1_bt_state = NM_DEVICE_STAGE_STATE_COMPLETED;
    nm_device_activate_schedule_stage1_device_prepare(NM_DEVICE(self), FALSE);
}

static NMActStageReturn
act_stage1_prepare(NMDevice *device, NMDeviceStateReason *out_failure_reason)
{
    NMDeviceBt *       self     = NM_DEVICE_BT(device);
    NMDeviceBtPrivate *priv     = NM_DEVICE_BT_GET_PRIVATE(self);
    gs_free_error GError *error = NULL;
    NMConnection *        connection;

    connection = nm_device_get_applied_connection(device);
    g_return_val_if_fail(connection, NM_ACT_STAGE_RETURN_FAILURE);

    priv->connect_bt_type = get_connection_bt_type(connection);
    if (priv->connect_bt_type == NM_BT_CAPABILITY_NONE) {
        NM_SET_OUT(out_failure_reason, NM_DEVICE_STATE_REASON_BT_FAILED);
        return NM_ACT_STAGE_RETURN_FAILURE;
    }

    if (priv->connect_bt_type == NM_BT_CAPABILITY_DUN && !priv->mm_running) {
        NM_SET_OUT(out_failure_reason, NM_DEVICE_STATE_REASON_MODEM_MANAGER_UNAVAILABLE);
        return NM_ACT_STAGE_RETURN_FAILURE;
    }

    if (priv->stage1_bt_state == NM_DEVICE_STAGE_STATE_PENDING)
        return NM_ACT_STAGE_RETURN_POSTPONE;
    else if (priv->stage1_bt_state == NM_DEVICE_STAGE_STATE_INIT) {
        gs_unref_object GCancellable *cancellable = NULL;
        char                          sbuf[100];

        _LOGD(LOGD_BT,
              "connecting to %s bluetooth device",
              nm_bluetooth_capability_to_string(priv->connect_bt_type, sbuf, sizeof(sbuf)));

        cancellable = g_cancellable_new();

        if (!nm_bluez_manager_connect(priv->bz_mgr,
                                      priv->dbus_path,
                                      priv->connect_bt_type,
                                      30000,
                                      cancellable,
                                      connect_bz_cb,
                                      self,
                                      &error)) {
            _LOGD(LOGD_BT, "cannot connect to bluetooth device: %s", error->message);
            *out_failure_reason = NM_DEVICE_STATE_REASON_BT_FAILED;
            return NM_ACT_STAGE_RETURN_FAILURE;
        }

        priv->connect_bz_cancellable = g_steal_pointer(&cancellable);
        priv->stage1_bt_state        = NM_DEVICE_STAGE_STATE_PENDING;
        return NM_ACT_STAGE_RETURN_POSTPONE;
    }

    if (priv->connect_bt_type == NM_BT_CAPABILITY_DUN) {
        if (!priv->modem) {
            gs_free NMModem **modems = NULL;
            guint             i, n;

            if (priv->connect_wait_modem_id == 0)
                priv->connect_wait_modem_id =
                    g_timeout_add_seconds(30, connect_wait_modem_timeout, self);

            modems = nm_modem_manager_get_modems(priv->modem_manager, &n);
            for (i = 0; i < n; i++) {
                if (modem_try_claim(self, modems[i]))
                    break;
            }
            if (!priv->modem)
                return NM_ACT_STAGE_RETURN_POSTPONE;
        }

        if (priv->stage1_modem_prepare_state == NM_DEVICE_STAGE_STATE_PENDING)
            return NM_ACT_STAGE_RETURN_POSTPONE;
        if (priv->stage1_modem_prepare_state == NM_DEVICE_STAGE_STATE_INIT) {
            priv->stage1_modem_prepare_state = NM_DEVICE_STAGE_STATE_PENDING;
            return nm_modem_act_stage1_prepare(priv->modem,
                                               nm_device_get_act_request(NM_DEVICE(self)),
                                               out_failure_reason);
        }
    }

    return NM_ACT_STAGE_RETURN_SUCCESS;
}

static NMActStageReturn
act_stage2_config(NMDevice *device, NMDeviceStateReason *out_failure_reason)
{
    NMDeviceBt *       self = NM_DEVICE_BT(device);
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);

    if (priv->connect_bt_type == NM_BT_CAPABILITY_DUN)
        nm_modem_act_stage2_config(priv->modem);

    return NM_ACT_STAGE_RETURN_SUCCESS;
}

static NMActStageReturn
act_stage3_ip_config_start(NMDevice *           device,
                           int                  addr_family,
                           gpointer *           out_config,
                           NMDeviceStateReason *out_failure_reason)
{
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(device);

    nm_assert_addr_family(addr_family);

    if (priv->connect_bt_type == NM_BT_CAPABILITY_DUN) {
        if (addr_family == AF_INET) {
            return nm_modem_stage3_ip4_config_start(priv->modem,
                                                    device,
                                                    NM_DEVICE_CLASS(nm_device_bt_parent_class),
                                                    out_failure_reason);
        } else {
            return nm_modem_stage3_ip6_config_start(priv->modem, device, out_failure_reason);
        }
    }

    return NM_DEVICE_CLASS(nm_device_bt_parent_class)
        ->act_stage3_ip_config_start(device, addr_family, out_config, out_failure_reason);
}

static void
deactivate(NMDevice *device)
{
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(device);

    nm_clear_g_signal_handler(nm_device_get_platform(device), &priv->connect_watch_link_id);
    nm_clear_g_source(&priv->connect_watch_link_idle_id);
    priv->stage1_bt_state = NM_DEVICE_STAGE_STATE_INIT;
    nm_clear_g_source(&priv->connect_wait_modem_id);
    nm_clear_g_cancellable(&priv->connect_bz_cancellable);

    priv->stage1_bt_state = NM_DEVICE_STAGE_STATE_INIT;

    if (priv->connect_bt_type == NM_BT_CAPABILITY_DUN) {
        if (priv->modem) {
            nm_modem_deactivate(priv->modem, device);

            /* Since we're killing the Modem object before it'll get the
             * state change signal, simulate the state change here.
             */
            nm_modem_device_state_changed(priv->modem,
                                          NM_DEVICE_STATE_DISCONNECTED,
                                          NM_DEVICE_STATE_ACTIVATED);
            modem_cleanup(NM_DEVICE_BT(device));
        }
    }

    if (priv->connect_bt_type != NM_BT_CAPABILITY_NONE) {
        priv->connect_bt_type = NM_BT_CAPABILITY_NONE;
        nm_bluez_manager_disconnect(priv->bz_mgr, priv->dbus_path);
    }

    nm_clear_g_free(&priv->connect_rfcomm_iface);

    if (NM_DEVICE_CLASS(nm_device_bt_parent_class)->deactivate)
        NM_DEVICE_CLASS(nm_device_bt_parent_class)->deactivate(device);
}

void
_nm_device_bt_notify_removed(NMDeviceBt *self)
{
    g_signal_emit_by_name(self, NM_DEVICE_REMOVED);
}

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

gboolean
_nm_device_bt_for_same_device(NMDeviceBt *            self,
                              const char *            dbus_path,
                              const char *            bdaddr,
                              const char *            name,
                              NMBluetoothCapabilities capabilities)
{
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);

    return nm_streq(priv->dbus_path, dbus_path) && nm_streq(priv->bdaddr, bdaddr)
           && capabilities == priv->capabilities && (!name || nm_streq(priv->name, name));
}

void
_nm_device_bt_notify_set_name(NMDeviceBt *self, const char *name)
{
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);

    nm_assert(name);

    if (!nm_streq(priv->name, name)) {
        _LOGT(LOGD_BT, "set-name: %s", name);
        g_free(priv->name);
        priv->name = g_strdup(name);
        _notify(self, PROP_BT_NAME);
    }
}

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

static gboolean
is_available(NMDevice *dev, NMDeviceCheckDevAvailableFlags flags)
{
    NMDeviceBt *       self = NM_DEVICE_BT(dev);
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);

    /* PAN doesn't need ModemManager, so devices that support it are always available */
    if (priv->capabilities & NM_BT_CAPABILITY_NAP)
        return TRUE;

    /* DUN requires ModemManager */
    return priv->mm_running;
}

static void
set_mm_running(NMDeviceBt *self)
{
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);
    gboolean           running;

    running = (nm_modem_manager_name_owner_get(priv->modem_manager) != NULL);

    if (priv->mm_running != running) {
        _LOGD(LOGD_BT, "ModemManager now %s", running ? "available" : "unavailable");

        priv->mm_running = running;
        nm_device_queue_recheck_available(NM_DEVICE(self),
                                          NM_DEVICE_STATE_REASON_NONE,
                                          NM_DEVICE_STATE_REASON_MODEM_MANAGER_UNAVAILABLE);
    }
}

static void
mm_name_owner_changed_cb(GObject *object, GParamSpec *pspec, gpointer user_data)
{
    set_mm_running(user_data);
}

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

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

    switch (prop_id) {
    case PROP_BT_NAME:
        g_value_set_string(value, priv->name);
        break;
    case PROP_BT_CAPABILITIES:
        g_value_set_uint(value, priv->capabilities);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

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

    switch (prop_id) {
    case PROP_BT_BZ_MGR:
        /* construct-only */
        priv->bz_mgr = g_object_ref(g_value_get_pointer(value));
        nm_assert(NM_IS_BLUEZ_MANAGER(priv->bz_mgr));
        break;
    case PROP_BT_DBUS_PATH:
        /* construct-only */
        priv->dbus_path = g_value_dup_string(value);
        nm_assert(priv->dbus_path);
        break;
    case PROP_BT_BDADDR:
        /* construct-only */
        priv->bdaddr = g_value_dup_string(value);
        nm_assert(priv->bdaddr);
        break;
    case PROP_BT_NAME:
        /* construct-only */
        priv->name = g_value_dup_string(value);
        nm_assert(priv->name);
        break;
    case PROP_BT_CAPABILITIES:
        /* construct-only */
        priv->capabilities = g_value_get_uint(value);
        nm_assert(NM_IN_SET((NMBluetoothCapabilities) priv->capabilities,
                            NM_BT_CAPABILITY_DUN,
                            NM_BT_CAPABILITY_NAP,
                            NM_BT_CAPABILITY_DUN | NM_BT_CAPABILITY_NAP));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

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

static void
nm_device_bt_init(NMDeviceBt *self)
{}

static void
constructed(GObject *object)
{
    NMDeviceBt *       self = NM_DEVICE_BT(object);
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);

    G_OBJECT_CLASS(nm_device_bt_parent_class)->constructed(object);

    priv->modem_manager = g_object_ref(nm_modem_manager_get());

    nm_modem_manager_name_owner_ref(priv->modem_manager);

    g_signal_connect(priv->modem_manager,
                     NM_MODEM_MANAGER_MODEM_ADDED,
                     G_CALLBACK(mm_modem_added_cb),
                     self);

    g_signal_connect(priv->modem_manager,
                     "notify::" NM_MODEM_MANAGER_NAME_OWNER,
                     G_CALLBACK(mm_name_owner_changed_cb),
                     self);

    set_mm_running(self);
}

NMDeviceBt *
nm_device_bt_new(NMBluezManager *        bz_mgr,
                 const char *            dbus_path,
                 const char *            bdaddr,
                 const char *            name,
                 NMBluetoothCapabilities capabilities)
{
    g_return_val_if_fail(NM_IS_BLUEZ_MANAGER(bz_mgr), NULL);
    g_return_val_if_fail(dbus_path, NULL);
    g_return_val_if_fail(bdaddr, NULL);
    g_return_val_if_fail(name, NULL);
    g_return_val_if_fail(capabilities != NM_BT_CAPABILITY_NONE, NULL);

    return g_object_new(NM_TYPE_DEVICE_BT,
                        NM_DEVICE_UDI,
                        dbus_path,
                        NM_DEVICE_IFACE,
                        bdaddr,
                        NM_DEVICE_DRIVER,
                        "bluez",
                        NM_DEVICE_PERM_HW_ADDRESS,
                        bdaddr,
                        NM_DEVICE_BT_BDADDR,
                        bdaddr,
                        NM_DEVICE_BT_BZ_MGR,
                        bz_mgr,
                        NM_DEVICE_BT_CAPABILITIES,
                        (guint) capabilities,
                        NM_DEVICE_BT_DBUS_PATH,
                        dbus_path,
                        NM_DEVICE_BT_NAME,
                        name,
                        NM_DEVICE_TYPE_DESC,
                        "Bluetooth",
                        NM_DEVICE_DEVICE_TYPE,
                        NM_DEVICE_TYPE_BT,
                        NULL);
}

static void
dispose(GObject *object)
{
    NMDeviceBt *       self = NM_DEVICE_BT(object);
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(self);

    nm_clear_g_signal_handler(nm_device_get_platform(NM_DEVICE(self)),
                              &priv->connect_watch_link_id);
    nm_clear_g_source(&priv->connect_watch_link_idle_id);

    nm_clear_g_source(&priv->connect_wait_modem_id);
    nm_clear_g_cancellable(&priv->connect_bz_cancellable);

    if (priv->modem_manager) {
        g_signal_handlers_disconnect_by_func(priv->modem_manager,
                                             G_CALLBACK(mm_name_owner_changed_cb),
                                             self);
        g_signal_handlers_disconnect_by_func(priv->modem_manager,
                                             G_CALLBACK(mm_modem_added_cb),
                                             self);
        nm_modem_manager_name_owner_unref(priv->modem_manager);
        g_clear_object(&priv->modem_manager);
    }

    modem_cleanup(self);

    G_OBJECT_CLASS(nm_device_bt_parent_class)->dispose(object);

    g_clear_object(&priv->bz_mgr);
}

static void
finalize(GObject *object)
{
    NMDeviceBtPrivate *priv = NM_DEVICE_BT_GET_PRIVATE(object);

    g_free(priv->connect_rfcomm_iface);
    g_free(priv->dbus_path);
    g_free(priv->name);
    g_free(priv->bdaddr);

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

static const NMDBusInterfaceInfoExtended interface_info_device_bluetooth = {
    .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
        NM_DBUS_INTERFACE_DEVICE_BLUETOOTH,
        .signals    = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ),
        .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress",
                                                             "s",
                                                             NM_DEVICE_HW_ADDRESS),
            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Name", "s", NM_DEVICE_BT_NAME),
            NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("BtCapabilities",
                                                             "u",
                                                             NM_DEVICE_BT_CAPABILITIES), ), ),
    .legacy_property_changed = TRUE,
};

static void
nm_device_bt_class_init(NMDeviceBtClass *klass)
{
    GObjectClass *     object_class      = G_OBJECT_CLASS(klass);
    NMDBusObjectClass *dbus_object_class = NM_DBUS_OBJECT_CLASS(klass);
    NMDeviceClass *    device_class      = NM_DEVICE_CLASS(klass);

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

    dbus_object_class->interface_infos = NM_DBUS_INTERFACE_INFOS(&interface_info_device_bluetooth);

    device_class->connection_type_check_compatible = NM_SETTING_BLUETOOTH_SETTING_NAME;

    device_class->get_generic_capabilities    = get_generic_capabilities;
    device_class->can_auto_connect            = can_auto_connect;
    device_class->deactivate                  = deactivate;
    device_class->act_stage1_prepare          = act_stage1_prepare;
    device_class->act_stage2_config           = act_stage2_config;
    device_class->act_stage3_ip_config_start  = act_stage3_ip_config_start;
    device_class->check_connection_compatible = check_connection_compatible;
    device_class->check_connection_available  = check_connection_available;
    device_class->complete_connection         = complete_connection;
    device_class->is_available                = is_available;
    device_class->get_configured_mtu          = nm_modem_get_configured_mtu;

    device_class->state_changed = device_state_changed;

    obj_properties[PROP_BT_BZ_MGR] =
        g_param_spec_pointer(NM_DEVICE_BT_BZ_MGR,
                             "",
                             "",
                             G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);

    obj_properties[PROP_BT_BDADDR] =
        g_param_spec_string(NM_DEVICE_BT_BDADDR,
                            "",
                            "",
                            NULL,
                            G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);

    obj_properties[PROP_BT_DBUS_PATH] =
        g_param_spec_string(NM_DEVICE_BT_DBUS_PATH,
                            "",
                            "",
                            NULL,
                            G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);

    obj_properties[PROP_BT_NAME] =
        g_param_spec_string(NM_DEVICE_BT_NAME,
                            "",
                            "",
                            NULL,
                            G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);

    obj_properties[PROP_BT_CAPABILITIES] =
        g_param_spec_uint(NM_DEVICE_BT_CAPABILITIES,
                          "",
                          "",
                          NM_BT_CAPABILITY_NONE,
                          G_MAXUINT,
                          NM_BT_CAPABILITY_NONE,
                          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);

    g_object_class_install_properties(object_class, _PROPERTY_ENUMS_LAST, obj_properties);

    signals[PPP_STATS] = g_signal_new(NM_DEVICE_BT_PPP_STATS,
                                      G_OBJECT_CLASS_TYPE(object_class),
                                      G_SIGNAL_RUN_FIRST,
                                      0,
                                      NULL,
                                      NULL,
                                      NULL,
                                      G_TYPE_NONE,
                                      2,
                                      G_TYPE_UINT /*guint32 in_bytes*/,
                                      G_TYPE_UINT /*guint32 out_bytes*/);
}
