/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2007 - 2008 Novell, Inc.
 * Copyright (C) 2007 - 2012 Red Hat, Inc.
 */

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

#include "nm-device-bt.h"

#include <linux/if_ether.h>

#include "nm-setting-connection.h"
#include "nm-setting-bluetooth.h"
#include "nm-utils.h"
#include "nm-object-private.h"
#include "nm-enum-types.h"

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

NM_GOBJECT_PROPERTIES_DEFINE_BASE(PROP_NAME, PROP_BT_CAPABILITIES, );

typedef struct {
    char *  name;
    guint32 bt_capabilities;
} 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, NMObject, NMDevice)

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

/**
 * nm_device_bt_get_hw_address: (skip)
 * @device: a #NMDeviceBt
 *
 * Gets the hardware (MAC) address of the #NMDeviceBt
 *
 * Returns: the hardware address. This is the internal string used by the
 * device, and must not be modified.
 *
 * Deprecated: 1.24: Use nm_device_get_hw_address() instead.
 **/
const char *
nm_device_bt_get_hw_address(NMDeviceBt *device)
{
    g_return_val_if_fail(NM_IS_DEVICE_BT(device), NULL);

    return nm_device_get_hw_address(NM_DEVICE(device));
}

/**
 * nm_device_bt_get_name:
 * @device: a #NMDeviceBt
 *
 * Gets the name of the #NMDeviceBt.
 *
 * Returns: the name of the device
 **/
const char *
nm_device_bt_get_name(NMDeviceBt *device)
{
    g_return_val_if_fail(NM_IS_DEVICE_BT(device), NULL);

    return NM_DEVICE_BT_GET_PRIVATE(device)->name;
}

/**
 * nm_device_bt_get_capabilities:
 * @device: a #NMDeviceBt
 *
 * Returns the Bluetooth device's usable capabilities.
 *
 * Returns: a combination of #NMBluetoothCapabilities
 **/
NMBluetoothCapabilities
nm_device_bt_get_capabilities(NMDeviceBt *device)
{
    g_return_val_if_fail(NM_IS_DEVICE_BT(device), NM_BT_CAPABILITY_NONE);

    return NM_DEVICE_BT_GET_PRIVATE(device)->bt_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)
        return NM_BT_CAPABILITY_NONE;

    bt_type = nm_setting_bluetooth_get_connection_type(s_bt);
    g_assert(bt_type);

    if (!strcmp(bt_type, NM_SETTING_BLUETOOTH_TYPE_DUN))
        return NM_BT_CAPABILITY_DUN;
    else if (!strcmp(bt_type, NM_SETTING_BLUETOOTH_TYPE_PANU))
        return NM_BT_CAPABILITY_NAP;

    return NM_BT_CAPABILITY_NONE;
}

static gboolean
connection_compatible(NMDevice *device, NMConnection *connection, GError **error)
{
    NMSettingBluetooth *    s_bt;
    const char *            hw_addr, *setting_addr;
    NMBluetoothCapabilities dev_caps;
    NMBluetoothCapabilities bt_type;

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

    if (!nm_connection_is_type(connection, NM_SETTING_BLUETOOTH_SETTING_NAME)
        || !(s_bt = nm_connection_get_setting_bluetooth(connection))) {
        g_set_error(error,
                    NM_DEVICE_ERROR,
                    NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION,
                    _("The connection was not a Bluetooth connection."));
        return FALSE;
    }

    if (nm_streq0(nm_setting_bluetooth_get_connection_type(s_bt), NM_SETTING_BLUETOOTH_TYPE_NAP)) {
        g_set_error(error,
                    NM_DEVICE_ERROR,
                    NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION,
                    _("The connection is of Bluetooth NAP type."));
        return FALSE;
    }

    /* Check BT address */
    hw_addr = nm_device_get_hw_address(device);
    if (hw_addr) {
        if (!nm_utils_hwaddr_valid(hw_addr, ETH_ALEN)) {
            g_set_error_literal(error,
                                NM_DEVICE_ERROR,
                                NM_DEVICE_ERROR_FAILED,
                                _("Invalid device Bluetooth address."));
            return FALSE;
        }
        setting_addr = nm_setting_bluetooth_get_bdaddr(s_bt);
        if (setting_addr && !nm_utils_hwaddr_matches(setting_addr, -1, hw_addr, -1)) {
            g_set_error_literal(
                error,
                NM_DEVICE_ERROR,
                NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION,
                _("The Bluetooth addresses of the device and the connection didn't match."));
            return FALSE;
        }
    }

    dev_caps = nm_device_bt_get_capabilities(NM_DEVICE_BT(device));
    bt_type  = get_connection_bt_type(connection);
    if (!(bt_type & dev_caps)) {
        g_set_error_literal(
            error,
            NM_DEVICE_ERROR,
            NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION,
            _("The device is lacking Bluetooth capabilities required by the connection."));
        return FALSE;
    }

    return TRUE;
}

static GType
get_setting_type(NMDevice *device)
{
    return NM_TYPE_SETTING_BLUETOOTH;
}

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

static void
nm_device_bt_init(NMDeviceBt *device)
{}

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

    g_free(priv->name);

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

static void
get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
    NMDeviceBt *device = NM_DEVICE_BT(object);

    switch (prop_id) {
    case PROP_NAME:
        g_value_set_string(value, nm_device_bt_get_name(device));
        break;
    case PROP_BT_CAPABILITIES:
        g_value_set_flags(value, nm_device_bt_get_capabilities(device));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

const NMLDBusMetaIface _nml_dbus_meta_iface_nm_device_bluetooth = NML_DBUS_META_IFACE_INIT_PROP(
    NM_DBUS_INTERFACE_DEVICE_BLUETOOTH,
    nm_device_bt_get_type,
    NML_DBUS_META_INTERFACE_PRIO_INSTANTIATE_30,
    NML_DBUS_META_IFACE_DBUS_PROPERTIES(
        NML_DBUS_META_PROPERTY_INIT_U("BtCapabilities",
                                      PROP_BT_CAPABILITIES,
                                      NMDeviceBt,
                                      _priv.bt_capabilities),
        NML_DBUS_META_PROPERTY_INIT_FCN("HwAddress",
                                        0,
                                        "s",
                                        _nm_device_notify_update_prop_hw_address),
        NML_DBUS_META_PROPERTY_INIT_S("Name", PROP_NAME, NMDeviceBt, _priv.name), ), );

static void
nm_device_bt_class_init(NMDeviceBtClass *bt_class)
{
    GObjectClass * object_class = G_OBJECT_CLASS(bt_class);
    NMDeviceClass *device_class = NM_DEVICE_CLASS(bt_class);

    object_class->get_property = get_property;
    object_class->finalize     = finalize;

    device_class->connection_compatible = connection_compatible;
    device_class->get_setting_type      = get_setting_type;

    /**
     * NMDeviceBt:name:
     *
     * The name of the bluetooth device.
     **/
    obj_properties[PROP_NAME] = g_param_spec_string(NM_DEVICE_BT_NAME,
                                                    "",
                                                    "",
                                                    NULL,
                                                    G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

    /**
     * NMDeviceBt:bt-capabilities:
     *
     * The device's bluetooth capabilities, a combination of #NMBluetoothCapabilities.
     **/
    obj_properties[PROP_BT_CAPABILITIES] =
        g_param_spec_flags(NM_DEVICE_BT_CAPABILITIES,
                           "",
                           "",
                           NM_TYPE_BLUETOOTH_CAPABILITIES,
                           NM_BT_CAPABILITY_NONE,
                           G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

    _nml_dbus_meta_class_init_with_properties(object_class,
                                              &_nml_dbus_meta_iface_nm_device_bluetooth);
}
