/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2012 - 2013 Red Hat, Inc.
 */

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

#include "nm-setting-bridge-port.h"

#include <ctype.h>
#include <stdlib.h>

#include "nm-utils.h"
#include "nm-utils-private.h"
#include "nm-connection-private.h"
#include "nm-setting-connection.h"
#include "nm-setting-bridge.h"

/**
 * SECTION:nm-setting-bridge-port
 * @short_description: Describes connection properties for bridge ports
 *
 * The #NMSettingBridgePort object is a #NMSetting subclass that describes
 * optional properties that apply to bridge ports.
 **/

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

NM_GOBJECT_PROPERTIES_DEFINE(NMSettingBridgePort,
                             PROP_PRIORITY,
                             PROP_PATH_COST,
                             PROP_HAIRPIN_MODE,
                             PROP_VLANS, );

typedef struct {
    GPtrArray *vlans;
    guint16    priority;
    guint16    path_cost;
    bool       hairpin_mode : 1;
} NMSettingBridgePortPrivate;

/**
 * NMSettingBridgePort:
 *
 * Bridge Port Settings
 */
struct _NMSettingBridgePort {
    NMSetting parent;
    /* In the past, this struct was public API. Preserve ABI! */
};

struct _NMSettingBridgePortClass {
    NMSettingClass parent;
    /* In the past, this struct was public API. Preserve ABI! */
    gpointer padding[4];
};

G_DEFINE_TYPE(NMSettingBridgePort, nm_setting_bridge_port, NM_TYPE_SETTING)

#define NM_SETTING_BRIDGE_PORT_GET_PRIVATE(o) \
    (G_TYPE_INSTANCE_GET_PRIVATE((o), NM_TYPE_SETTING_BRIDGE_PORT, NMSettingBridgePortPrivate))

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

static int
vlan_ptr_cmp(gconstpointer a, gconstpointer b)
{
    const NMBridgeVlan *vlan_a = *(const NMBridgeVlan **) a;
    const NMBridgeVlan *vlan_b = *(const NMBridgeVlan **) b;

    return nm_bridge_vlan_cmp(vlan_a, vlan_b);
}

gboolean
_nm_setting_bridge_port_sort_vlans(NMSettingBridgePort *setting)
{
    NMSettingBridgePortPrivate *priv;
    gboolean                    need_sort = FALSE;
    guint                       i;

    priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting);

    for (i = 1; i < priv->vlans->len; i++) {
        NMBridgeVlan *vlan_prev = priv->vlans->pdata[i - 1];
        NMBridgeVlan *vlan      = priv->vlans->pdata[i];

        if (nm_bridge_vlan_cmp(vlan_prev, vlan) > 0) {
            need_sort = TRUE;
            break;
        }
    }

    if (need_sort) {
        g_ptr_array_sort(priv->vlans, vlan_ptr_cmp);
        _notify(setting, PROP_VLANS);
    }

    return need_sort;
}

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

/**
 * nm_setting_bridge_port_get_priority:
 * @setting: the #NMSettingBridgePort
 *
 * Returns: the #NMSettingBridgePort:priority property of the setting
 **/
guint16
nm_setting_bridge_port_get_priority(NMSettingBridgePort *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_BRIDGE_PORT(setting), 0);

    return NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting)->priority;
}

/**
 * nm_setting_bridge_port_get_path_cost:
 * @setting: the #NMSettingBridgePort
 *
 * Returns: the #NMSettingBridgePort:path-cost property of the setting
 **/
guint16
nm_setting_bridge_port_get_path_cost(NMSettingBridgePort *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_BRIDGE_PORT(setting), 0);

    return NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting)->path_cost;
}

/**
 * nm_setting_bridge_port_get_hairpin_mode:
 * @setting: the #NMSettingBridgePort
 *
 * Returns: the #NMSettingBridgePort:hairpin-mode property of the setting
 **/
gboolean
nm_setting_bridge_port_get_hairpin_mode(NMSettingBridgePort *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_BRIDGE_PORT(setting), FALSE);

    return NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting)->hairpin_mode;
}

/**
 * nm_setting_bridge_port_add_vlan:
 * @setting: the #NMSettingBridgePort
 * @vlan: the vlan to add
 *
 * Appends a new vlan and associated information to the setting.  The
 * given vlan gets sealed and a reference to it is added.
 *
 * Since: 1.18
 **/
void
nm_setting_bridge_port_add_vlan(NMSettingBridgePort *setting, NMBridgeVlan *vlan)
{
    NMSettingBridgePortPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_BRIDGE_PORT(setting));
    g_return_if_fail(vlan);

    priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting);

    nm_bridge_vlan_seal(vlan);
    nm_bridge_vlan_ref(vlan);

    g_ptr_array_add(priv->vlans, vlan);
    _notify(setting, PROP_VLANS);
}

/**
 * nm_setting_bridge_port_get_num_vlans:
 * @setting: the #NMSettingBridgePort
 *
 * Returns: the number of VLANs
 *
 * Since: 1.18
 **/
guint
nm_setting_bridge_port_get_num_vlans(NMSettingBridgePort *setting)
{
    NMSettingBridgePortPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_BRIDGE_PORT(setting), 0);
    priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting);

    return priv->vlans->len;
}

/**
 * nm_setting_bridge_port_get_vlan:
 * @setting: the #NMSettingBridgePort
 * @idx: index number of the VLAN to return
 *
 * Returns: (transfer none): the VLAN at index @idx
 *
 * Since: 1.18
 **/
NMBridgeVlan *
nm_setting_bridge_port_get_vlan(NMSettingBridgePort *setting, guint idx)
{
    NMSettingBridgePortPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_BRIDGE_PORT(setting), NULL);
    priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting);

    g_return_val_if_fail(idx < priv->vlans->len, NULL);

    return priv->vlans->pdata[idx];
}

/**
 * nm_setting_bridge_port_remove_vlan:
 * @setting: the #NMSettingBridgePort
 * @idx: index number of the VLAN.
 *
 * Removes the vlan at index @idx.
 *
 * Since: 1.18
 **/
void
nm_setting_bridge_port_remove_vlan(NMSettingBridgePort *setting, guint idx)
{
    NMSettingBridgePortPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_BRIDGE_PORT(setting));
    priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting);

    g_return_if_fail(idx < priv->vlans->len);

    g_ptr_array_remove_index(priv->vlans, idx);
    _notify(setting, PROP_VLANS);
}

/**
 * nm_setting_bridge_port_remove_vlan_by_vid:
 * @setting: the #NMSettingBridgePort
 * @vid_start: the vlan start index
 * @vid_end: the vlan end index
 *
 * Remove the VLAN with range @vid_start to @vid_end.
 * If @vid_end is zero, it is assumed to be equal to @vid_start
 * and so the single-id VLAN with id @vid_start is removed.
 *
 * Returns: %TRUE if the vlan was found and removed; %FALSE otherwise
 *
 * Since: 1.18
 **/
gboolean
nm_setting_bridge_port_remove_vlan_by_vid(NMSettingBridgePort *setting,
                                          guint16              vid_start,
                                          guint16              vid_end)
{
    NMSettingBridgePortPrivate *priv;
    guint                       i;

    if (vid_end == 0)
        vid_end = vid_start;

    g_return_val_if_fail(NM_IS_SETTING_BRIDGE_PORT(setting), FALSE);

    priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting);

    for (i = 0; i < priv->vlans->len; i++) {
        NMBridgeVlan *vlan    = priv->vlans->pdata[i];
        guint16       v_start = 0;
        guint16       v_end   = 0;

        nm_bridge_vlan_get_vid_range(vlan, &v_start, &v_end);
        if (v_start == vid_start && v_end == vid_end) {
            g_ptr_array_remove_index(priv->vlans, i);
            _notify(setting, PROP_VLANS);
            return TRUE;
        }
    }
    return FALSE;
}

/**
 * nm_setting_bridge_port_clear_vlans:
 * @setting: the #NMSettingBridgePort
 *
 * Removes all configured VLANs.
 *
 * Since: 1.18
 **/
void
nm_setting_bridge_port_clear_vlans(NMSettingBridgePort *setting)
{
    NMSettingBridgePortPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_BRIDGE_PORT(setting));
    priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting);

    if (priv->vlans->len != 0) {
        g_ptr_array_set_size(priv->vlans, 0);
        _notify(setting, PROP_VLANS);
    }
}

GPtrArray *
_nm_setting_bridge_port_get_vlans(NMSettingBridgePort *setting)
{
    nm_assert(NM_IS_SETTING_BRIDGE_PORT(setting));

    return NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting)->vlans;
}

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

static gboolean
verify(NMSetting *setting, NMConnection *connection, GError **error)
{
    NMSettingBridgePortPrivate *priv;

    priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting);

    if (connection) {
        NMSettingConnection *s_con;
        const char *         slave_type;

        s_con = nm_connection_get_setting_connection(connection);
        if (!s_con) {
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_MISSING_SETTING,
                        _("missing setting"));
            g_prefix_error(error, "%s: ", NM_SETTING_CONNECTION_SETTING_NAME);
            return FALSE;
        }

        slave_type = nm_setting_connection_get_slave_type(s_con);
        if (slave_type && strcmp(slave_type, NM_SETTING_BRIDGE_SETTING_NAME)) {
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_INVALID_PROPERTY,
                        _("A connection with a '%s' setting must have the slave-type set to '%s'. "
                          "Instead it is '%s'"),
                        NM_SETTING_BRIDGE_PORT_SETTING_NAME,
                        NM_SETTING_BRIDGE_SETTING_NAME,
                        slave_type);
            g_prefix_error(error,
                           "%s.%s: ",
                           NM_SETTING_CONNECTION_SETTING_NAME,
                           NM_SETTING_CONNECTION_SLAVE_TYPE);
            return FALSE;
        }
    }

    if (!_nm_utils_bridge_vlan_verify_list(priv->vlans,
                                           FALSE,
                                           error,
                                           NM_SETTING_BRIDGE_PORT_SETTING_NAME,
                                           NM_SETTING_BRIDGE_PORT_VLANS))
        return FALSE;

    /* Failures from here on are NORMALIZABLE... */

    if (!_nm_utils_bridge_vlan_verify_list(priv->vlans,
                                           TRUE,
                                           error,
                                           NM_SETTING_BRIDGE_PORT_SETTING_NAME,
                                           NM_SETTING_BRIDGE_PORT_VLANS))
        return NM_SETTING_VERIFY_NORMALIZABLE;

    return TRUE;
}

static NMTernary
compare_property(const NMSettInfoSetting *sett_info,
                 guint                    property_idx,
                 NMConnection *           con_a,
                 NMSetting *              set_a,
                 NMConnection *           con_b,
                 NMSetting *              set_b,
                 NMSettingCompareFlags    flags)
{
    NMSettingBridgePortPrivate *priv_a;
    NMSettingBridgePortPrivate *priv_b;
    guint                       i;

    if (nm_streq(sett_info->property_infos[property_idx].name, NM_SETTING_BRIDGE_PORT_VLANS)) {
        if (set_b) {
            priv_a = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(set_a);
            priv_b = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(set_b);

            if (priv_a->vlans->len != priv_b->vlans->len)
                return FALSE;
            for (i = 0; i < priv_a->vlans->len; i++) {
                if (nm_bridge_vlan_cmp(priv_a->vlans->pdata[i], priv_b->vlans->pdata[i]))
                    return FALSE;
            }
        }
        return TRUE;
    }

    return NM_SETTING_CLASS(nm_setting_bridge_port_parent_class)
        ->compare_property(sett_info, property_idx, con_a, set_a, con_b, set_b, flags);
}

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

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

    switch (prop_id) {
    case PROP_PRIORITY:
        g_value_set_uint(value, priv->priority);
        break;
    case PROP_PATH_COST:
        g_value_set_uint(value, priv->path_cost);
        break;
    case PROP_HAIRPIN_MODE:
        g_value_set_boolean(value, priv->hairpin_mode);
        break;
    case PROP_VLANS:
        g_value_take_boxed(value,
                           _nm_utils_copy_array(priv->vlans,
                                                (NMUtilsCopyFunc) nm_bridge_vlan_ref,
                                                (GDestroyNotify) nm_bridge_vlan_unref));
        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)
{
    NMSettingBridgePortPrivate *priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(object);

    switch (prop_id) {
    case PROP_PRIORITY:
        priv->priority = g_value_get_uint(value);
        break;
    case PROP_PATH_COST:
        priv->path_cost = g_value_get_uint(value);
        break;
    case PROP_HAIRPIN_MODE:
        priv->hairpin_mode = g_value_get_boolean(value);
        break;
    case PROP_VLANS:
        g_ptr_array_unref(priv->vlans);
        priv->vlans = _nm_utils_copy_array(g_value_get_boxed(value),
                                           (NMUtilsCopyFunc) _nm_bridge_vlan_dup_and_seal,
                                           (GDestroyNotify) nm_bridge_vlan_unref);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

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

static void
nm_setting_bridge_port_init(NMSettingBridgePort *setting)
{
    NMSettingBridgePortPrivate *priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(setting);

    priv->vlans = g_ptr_array_new_with_free_func((GDestroyNotify) nm_bridge_vlan_unref);

    priv->priority  = NM_BRIDGE_PORT_PRIORITY_DEF;
    priv->path_cost = NM_BRIDGE_PORT_PATH_COST_DEF;
}

/**
 * nm_setting_bridge_port_new:
 *
 * Creates a new #NMSettingBridgePort object with default values.
 *
 * Returns: (transfer full): the new empty #NMSettingBridgePort object
 **/
NMSetting *
nm_setting_bridge_port_new(void)
{
    return g_object_new(NM_TYPE_SETTING_BRIDGE_PORT, NULL);
}

static void
finalize(GObject *object)
{
    NMSettingBridgePortPrivate *priv = NM_SETTING_BRIDGE_PORT_GET_PRIVATE(object);

    g_ptr_array_unref(priv->vlans);

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

static void
nm_setting_bridge_port_class_init(NMSettingBridgePortClass *klass)
{
    GObjectClass *  object_class        = G_OBJECT_CLASS(klass);
    NMSettingClass *setting_class       = NM_SETTING_CLASS(klass);
    GArray *        properties_override = _nm_sett_info_property_override_create_array();

    g_type_class_add_private(klass, sizeof(NMSettingBridgePortPrivate));

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

    setting_class->compare_property = compare_property;
    setting_class->verify           = verify;

    /**
     * NMSettingBridgePort:priority:
     *
     * The Spanning Tree Protocol (STP) priority of this bridge port.
     **/
    /* ---ifcfg-rh---
     * property: priority
     * variable: BRIDGING_OPTS: priority=
     * values: 0 - 63
     * default: 32
     * description: STP priority.
     * ---end---
     */
    obj_properties[PROP_PRIORITY] =
        g_param_spec_uint(NM_SETTING_BRIDGE_PORT_PRIORITY,
                          "",
                          "",
                          NM_BRIDGE_PORT_PRIORITY_MIN,
                          NM_BRIDGE_PORT_PRIORITY_MAX,
                          NM_BRIDGE_PORT_PRIORITY_DEF,
                          G_PARAM_READWRITE | NM_SETTING_PARAM_INFERRABLE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingBridgePort:path-cost:
     *
     * The Spanning Tree Protocol (STP) port cost for destinations via this
     * port.
     **/
    /* ---ifcfg-rh---
     * property: path-cost
     * variable: BRIDGING_OPTS: path_cost=
     * values: 1 - 65535
     * default: 100
     * description: STP cost.
     * ---end---
     */
    obj_properties[PROP_PATH_COST] = g_param_spec_uint(NM_SETTING_BRIDGE_PORT_PATH_COST,
                                                       "",
                                                       "",
                                                       NM_BRIDGE_PORT_PATH_COST_MIN,
                                                       NM_BRIDGE_PORT_PATH_COST_MAX,
                                                       NM_BRIDGE_PORT_PATH_COST_DEF,
                                                       G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingBridgePort:hairpin-mode:
     *
     * Enables or disables "hairpin mode" for the port, which allows frames to
     * be sent back out through the port the frame was received on.
     **/
    /* ---ifcfg-rh---
     * property: hairpin-mode
     * variable: BRIDGING_OPTS: hairpin_mode=
     * default: yes
     * description: Hairpin mode of the bridge port.
     * ---end---
     */
    _nm_setting_property_define_boolean(properties_override,
                                        obj_properties,
                                        NM_SETTING_BRIDGE_PORT_HAIRPIN_MODE,
                                        PROP_HAIRPIN_MODE,
                                        FALSE,
                                        NM_SETTING_PARAM_INFERRABLE,
                                        nm_setting_bridge_port_get_hairpin_mode);

    /**
     * NMSettingBridgePort:vlans: (type GPtrArray(NMBridgeVlan))
     *
     * Array of bridge VLAN objects. In addition to the VLANs
     * specified here, the port will also have the default-pvid
     * VLAN configured on the bridge by the bridge.vlan-default-pvid
     * property.
     *
     * In nmcli the VLAN list can be specified with the following
     * syntax:
     *
     *  $vid [pvid] [untagged] [, $vid [pvid] [untagged]]...
     *
     * where $vid is either a single id between 1 and 4094 or a
     * range, represented as a couple of ids separated by a dash.
     *
     * Since: 1.18
     **/
    /* ---ifcfg-rh---
     * property: vlans
     * variable: BRIDGE_PORT_VLANS
     * description: List of VLANs on the bridge port
     * example: BRIDGE_PORT_VLANS="1 pvid untagged,20,300-400 untagged"
     * ---end---
     */
    obj_properties[PROP_VLANS] = g_param_spec_boxed(NM_SETTING_BRIDGE_PORT_VLANS,
                                                    "",
                                                    "",
                                                    G_TYPE_PTR_ARRAY,
                                                    G_PARAM_READWRITE | NM_SETTING_PARAM_INFERRABLE
                                                        | G_PARAM_STATIC_STRINGS);
    _nm_properties_override_gobj(properties_override,
                                 obj_properties[PROP_VLANS],
                                 &nm_sett_info_propert_type_bridge_vlans);

    g_object_class_install_properties(object_class, _PROPERTY_ENUMS_LAST, obj_properties);

    _nm_setting_class_commit_full(setting_class,
                                  NM_META_SETTING_TYPE_BRIDGE_PORT,
                                  NULL,
                                  properties_override);
}
