/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2011 - 2012 Red Hat, Inc.
 * Copyright (C) 2008 Novell, Inc.
 */

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

#include "nm-device-modem.h"

#include "nm-setting-connection.h"
#include "nm-setting-gsm.h"
#include "nm-setting-cdma.h"
#include "nm-object-private.h"
#include "nm-enum-types.h"

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

NM_GOBJECT_PROPERTIES_DEFINE_BASE(PROP_MODEM_CAPABILITIES,
                                  PROP_CURRENT_CAPABILITIES,
                                  PROP_DEVICE_ID,
                                  PROP_OPERATOR_CODE,
                                  PROP_APN, );

typedef struct {
    char   *device_id;
    char   *operator_code;
    char   *apn;
    guint32 modem_capabilities;
    guint32 current_capabilities;
} NMDeviceModemPrivate;

struct _NMDeviceModem {
    NMDevice             parent;
    NMDeviceModemPrivate _priv;
};

struct _NMDeviceModemClass {
    NMDeviceClass parent;
};

G_DEFINE_TYPE(NMDeviceModem, nm_device_modem, NM_TYPE_DEVICE)

#define NM_DEVICE_MODEM_GET_PRIVATE(self) \
    _NM_GET_PRIVATE(self, NMDeviceModem, NM_IS_DEVICE_MODEM, NMObject, NMDevice)

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

/**
 * nm_device_modem_get_modem_capabilities:
 * @self: a #NMDeviceModem
 *
 * Returns a bitfield of the generic access technology families the modem
 * supports.  Not all capabilities are available concurrently however; some
 * may require a firmware reload or reinitialization.
 *
 * Returns: the generic access technology families the modem supports
 **/
NMDeviceModemCapabilities
nm_device_modem_get_modem_capabilities(NMDeviceModem *self)
{
    g_return_val_if_fail(NM_IS_DEVICE_MODEM(self), NM_DEVICE_MODEM_CAPABILITY_NONE);

    return NM_DEVICE_MODEM_GET_PRIVATE(self)->modem_capabilities;
}

/**
 * nm_device_modem_get_current_capabilities:
 * @self: a #NMDeviceModem
 *
 * Returns a bitfield of the generic access technology families the modem
 * supports without a firmware reload or reinitialization.  This value
 * represents the network types the modem can immediately connect to.
 *
 * Returns: the generic access technology families the modem supports without
 * a firmware reload or other reinitialization
 **/
NMDeviceModemCapabilities
nm_device_modem_get_current_capabilities(NMDeviceModem *self)
{
    g_return_val_if_fail(NM_IS_DEVICE_MODEM(self), NM_DEVICE_MODEM_CAPABILITY_NONE);

    return NM_DEVICE_MODEM_GET_PRIVATE(self)->current_capabilities;
}

/**
 * nm_device_modem_get_device_id:
 * @self: a #NMDeviceModem
 *
 * An identifier used by the modem backend (ModemManager) that aims to
 * uniquely identify the a device. Can be used to match a connection to a
 * particular device.
 *
 * Returns: a device-id string
 *
 * Since: 1.20
 **/
const char *
nm_device_modem_get_device_id(NMDeviceModem *self)
{
    g_return_val_if_fail(NM_IS_DEVICE_MODEM(self), NULL);

    return NM_DEVICE_MODEM_GET_PRIVATE(self)->device_id;
}

/**
 * nm_device_modem_get_operator_code:
 * @self: a #NMDeviceModem
 *
 * The MCC and MNC (concatenated) of the network the modem is connected to.
 *
 * Returns: the operator code or %NULL if disconnected or not a 3GPP modem.
 *
 * Since: 1.20
 **/
const char *
nm_device_modem_get_operator_code(NMDeviceModem *self)
{
    g_return_val_if_fail(NM_IS_DEVICE_MODEM(self), NULL);

    return NM_DEVICE_MODEM_GET_PRIVATE(self)->operator_code;
}

/**
 * nm_device_modem_get_apn:
 * @self: a #NMDeviceModem
 *
 * The access point name the modem is connected to.
 *
 * Returns: the APN name or %NULL if disconnected
 *
 * Since: 1.20
 **/
const char *
nm_device_modem_get_apn(NMDeviceModem *self)
{
    g_return_val_if_fail(NM_IS_DEVICE_MODEM(self), NULL);

    return NM_DEVICE_MODEM_GET_PRIVATE(self)->apn;
}

static const char *
get_type_description(NMDevice *device)
{
    NMDeviceModemCapabilities caps;

    caps = nm_device_modem_get_current_capabilities(NM_DEVICE_MODEM(device));
    if (caps & NM_DEVICE_MODEM_CAPABILITY_GSM_UMTS)
        return "gsm";
    else if (caps & NM_DEVICE_MODEM_CAPABILITY_CDMA_EVDO)
        return "cdma";
    else
        return NULL;
}

#define MODEM_CAPS_3GPP(caps)                                                          \
    NM_FLAGS_ANY((caps),                                                               \
                 (NM_DEVICE_MODEM_CAPABILITY_GSM_UMTS | NM_DEVICE_MODEM_CAPABILITY_LTE \
                  | NM_DEVICE_MODEM_CAPABILITY_5GNR))

#define MODEM_CAPS_3GPP2(caps) NM_FLAGS_ANY((caps), NM_DEVICE_MODEM_CAPABILITY_CDMA_EVDO)

static gboolean
connection_compatible(NMDevice *device, NMConnection *connection, GError **error)
{
    NMSettingGsm             *s_gsm;
    NMSettingCdma            *s_cdma;
    NMDeviceModemCapabilities current_caps;

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

    if (!nm_connection_is_type(connection, NM_SETTING_GSM_SETTING_NAME)
        && !nm_connection_is_type(connection, NM_SETTING_CDMA_SETTING_NAME)) {
        g_set_error_literal(error,
                            NM_DEVICE_ERROR,
                            NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION,
                            _("The connection was not a modem connection."));
        return FALSE;
    }

    s_gsm  = nm_connection_get_setting_gsm(connection);
    s_cdma = nm_connection_get_setting_cdma(connection);
    if (!s_cdma && !s_gsm) {
        g_set_error_literal(error,
                            NM_DEVICE_ERROR,
                            NM_DEVICE_ERROR_INVALID_CONNECTION,
                            _("The connection was not a valid modem connection."));
        return FALSE;
    }

    current_caps = nm_device_modem_get_current_capabilities(NM_DEVICE_MODEM(device));
    if (!(s_gsm && MODEM_CAPS_3GPP(current_caps)) && !(s_cdma && MODEM_CAPS_3GPP2(current_caps))) {
        g_set_error_literal(error,
                            NM_DEVICE_ERROR,
                            NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION,
                            _("The device is lacking capabilities required by the connection."));
        return FALSE;
    }

    return TRUE;
}

static GType
get_setting_type(NMDevice *device)
{
    NMDeviceModemCapabilities caps;

    caps = nm_device_modem_get_current_capabilities(NM_DEVICE_MODEM(device));
    if (MODEM_CAPS_3GPP(caps))
        return NM_TYPE_SETTING_GSM;
    else if (MODEM_CAPS_3GPP2(caps))
        return NM_TYPE_SETTING_CDMA;
    else
        return G_TYPE_INVALID;
}

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

static void
nm_device_modem_init(NMDeviceModem *device)
{}

static void
finalize(GObject *object)
{
    NMDeviceModemPrivate *priv = NM_DEVICE_MODEM_GET_PRIVATE(object);

    g_free(priv->device_id);
    g_free(priv->operator_code);
    g_free(priv->apn);

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

static void
get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
    NMDeviceModem *self = NM_DEVICE_MODEM(object);

    switch (prop_id) {
    case PROP_MODEM_CAPABILITIES:
        g_value_set_flags(value, nm_device_modem_get_modem_capabilities(self));
        break;
    case PROP_CURRENT_CAPABILITIES:
        g_value_set_flags(value, nm_device_modem_get_current_capabilities(self));
        break;
    case PROP_DEVICE_ID:
        g_value_set_string(value, nm_device_modem_get_device_id(self));
        break;
    case PROP_OPERATOR_CODE:
        g_value_set_string(value, nm_device_modem_get_operator_code(self));
        break;
    case PROP_APN:
        g_value_set_string(value, nm_device_modem_get_apn(self));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

const NMLDBusMetaIface _nml_dbus_meta_iface_nm_device_modem = NML_DBUS_META_IFACE_INIT_PROP(
    NM_DBUS_INTERFACE_DEVICE_MODEM,
    nm_device_modem_get_type,
    NML_DBUS_META_INTERFACE_PRIO_INSTANTIATE_30,
    NML_DBUS_META_IFACE_DBUS_PROPERTIES(
        NML_DBUS_META_PROPERTY_INIT_S("Apn", PROP_APN, NMDeviceModem, _priv.apn),
        NML_DBUS_META_PROPERTY_INIT_U("CurrentCapabilities",
                                      PROP_CURRENT_CAPABILITIES,
                                      NMDeviceModem,
                                      _priv.current_capabilities),
        NML_DBUS_META_PROPERTY_INIT_S("DeviceId", PROP_DEVICE_ID, NMDeviceModem, _priv.device_id),
        NML_DBUS_META_PROPERTY_INIT_U("ModemCapabilities",
                                      PROP_MODEM_CAPABILITIES,
                                      NMDeviceModem,
                                      _priv.modem_capabilities),
        NML_DBUS_META_PROPERTY_INIT_S("OperatorCode",
                                      PROP_OPERATOR_CODE,
                                      NMDeviceModem,
                                      _priv.operator_code), ), );

static void
nm_device_modem_class_init(NMDeviceModemClass *modem_class)
{
    GObjectClass  *object_class = G_OBJECT_CLASS(modem_class);
    NMDeviceClass *device_class = NM_DEVICE_CLASS(modem_class);

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

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

    /**
     * NMDeviceModem:modem-capabilities:
     *
     * The generic family of access technologies the modem supports.  Not all
     * capabilities are available at the same time however; some modems require
     * a firmware reload or other reinitialization to switch between eg
     * CDMA/EVDO and GSM/UMTS.
     **/
    obj_properties[PROP_MODEM_CAPABILITIES] =
        g_param_spec_flags(NM_DEVICE_MODEM_MODEM_CAPABILITIES,
                           "",
                           "",
                           NM_TYPE_DEVICE_MODEM_CAPABILITIES,
                           NM_DEVICE_MODEM_CAPABILITY_NONE,
                           G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

    /**
     * NMDeviceModem:current-capabilities:
     *
     * The generic family of access technologies the modem currently supports
     * without a firmware reload or reinitialization.
     **/
    obj_properties[PROP_CURRENT_CAPABILITIES] =
        g_param_spec_flags(NM_DEVICE_MODEM_CURRENT_CAPABILITIES,
                           "",
                           "",
                           NM_TYPE_DEVICE_MODEM_CAPABILITIES,
                           NM_DEVICE_MODEM_CAPABILITY_NONE,
                           G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

    /**
     * NMDeviceModem:device-id:
     *
     * Since: 1.20
     **/
    obj_properties[PROP_DEVICE_ID] = g_param_spec_string(NM_DEVICE_MODEM_DEVICE_ID,
                                                         "",
                                                         "",
                                                         NULL,
                                                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

    /**
     * NMDeviceModem:operator-code:
     *
     * Since: 1.20
     **/
    obj_properties[PROP_OPERATOR_CODE] =
        g_param_spec_string(NM_DEVICE_MODEM_OPERATOR_CODE,
                            "",
                            "",
                            NULL,
                            G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

    /**
     * NMDeviceModem:apn:
     *
     * Since: 1.20
     **/
    obj_properties[PROP_APN] = g_param_spec_string(NM_DEVICE_MODEM_APN,
                                                   "",
                                                   "",
                                                   NULL,
                                                   G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

    _nml_dbus_meta_class_init_with_properties(object_class, &_nml_dbus_meta_iface_nm_device_modem);
}
