/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2013 Red Hat, Inc.
 */

/**
 * SECTION:nmt-mac-entry
 * @short_description: #NmtNewtEntry for hardware address entry
 *
 * #NmtMacEntry is an #NmtNewtEntry for entering hardware addresses.
 * It will only allow typing characters that are valid in a hardware
 * address, and will set its #NmtNewtWidget:valid property depending
 * on whether it currently contains a valid hardware address.
 */

#include "nm-default.h"

#include "nmt-mac-entry.h"

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

#include "nm-libnm-core-intern/nm-common-macros.h"

G_DEFINE_TYPE(NmtMacEntry, nmt_mac_entry, NMT_TYPE_NEWT_ENTRY)

#define NMT_MAC_ENTRY_GET_PRIVATE(o) \
    (G_TYPE_INSTANCE_GET_PRIVATE((o), NMT_TYPE_MAC_ENTRY, NmtMacEntryPrivate))

typedef struct {
    int             mac_length;
    int             mac_str_length;
    NmtMacEntryType entry_type;

} NmtMacEntryPrivate;

enum {
    PROP_0,
    PROP_MAC_LENGTH,
    PROP_MAC_ADDRESS,
    PROP_ENTRY_TYPE,

    LAST_PROP
};

/**
 * nmt_mac_entry_new:
 * @width: the width in characters of the entry
 * @mac_length: the length in bytes of the hardware address
 *   (either %ETH_ALEN or %INFINIBAND_ALEN)
 * @entry_type: the type of the entry.
 *
 * Creates a new #NmtMacEntry.
 *
 * Returns: a new #NmtMacEntry.
 */
NmtNewtWidget *
nmt_mac_entry_new(int width, int mac_length, NmtMacEntryType entry_type)
{
    return g_object_new(NMT_TYPE_MAC_ENTRY,
                        "width",
                        width,
                        "mac-length",
                        mac_length,
                        "entry-type",
                        (int) entry_type,
                        NULL);
}

static gboolean
mac_filter(NmtNewtEntry *entry, const char *text, int ch, int position, gpointer user_data)
{
    NmtMacEntryPrivate *priv = NMT_MAC_ENTRY_GET_PRIVATE(entry);

    if (priv->entry_type != NMT_MAC_ENTRY_TYPE_MAC)
        return TRUE;

    if (position >= priv->mac_str_length)
        return FALSE;

    return g_ascii_isxdigit(ch) || ch == ':';
}

static gboolean
mac_validator(NmtNewtEntry *entry, const char *text, gpointer user_data)
{
    NmtMacEntryPrivate *priv = NMT_MAC_ENTRY_GET_PRIVATE(entry);
    const char *        p;

    if (!*text)
        return TRUE;

    if (priv->entry_type == NMT_MAC_ENTRY_TYPE_CLONED) {
        if (NM_CLONED_MAC_IS_SPECIAL(text))
            return TRUE;
    }

    p = text;
    while (g_ascii_isxdigit(p[0]) && g_ascii_isxdigit(p[1]) && p[2] == ':')
        p += 3;

    if (!g_ascii_isxdigit(p[0]) || !g_ascii_isxdigit(p[1]))
        return FALSE;
    p += 2;

    if (!*p)
        return (p - text == priv->mac_str_length);

    if (g_ascii_isxdigit(p[0]) && !p[1] && p - text < priv->mac_str_length) {
        char *fixed = g_strdup_printf("%.*s:%c", (int) (p - text), text, *p);

        nmt_newt_entry_set_text(entry, fixed);
        g_free(fixed);

        /* FIXME: NmtNewtEntry doesn't correctly deal with us calling set_text()
         * from inside the validator.
         */
        nmt_newt_widget_needs_rebuild(NMT_NEWT_WIDGET(entry));
    }

    return FALSE;
}

static void
nmt_mac_entry_init(NmtMacEntry *entry)
{
    nmt_newt_entry_set_filter(NMT_NEWT_ENTRY(entry), mac_filter, NULL);
    nmt_newt_entry_set_validator(NMT_NEWT_ENTRY(entry), mac_validator, NULL);
}

static void
nmt_mac_entry_notify(GObject *object, GParamSpec *pspec)
{
    if (G_OBJECT_CLASS(nmt_mac_entry_parent_class)->notify)
        G_OBJECT_CLASS(nmt_mac_entry_parent_class)->notify(object, pspec);

    if (pspec->owner_type == NMT_TYPE_NEWT_ENTRY && !strcmp(pspec->name, "text"))
        g_object_notify(object, "mac-address");
}

static void
nmt_mac_entry_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
    NmtMacEntryPrivate *priv = NMT_MAC_ENTRY_GET_PRIVATE(object);

    switch (prop_id) {
    case PROP_MAC_LENGTH:
        priv->mac_length     = g_value_get_int(value);
        priv->mac_str_length = priv->mac_length * 3 - 1;
        break;
    case PROP_MAC_ADDRESS:
        nmt_newt_entry_set_text(NMT_NEWT_ENTRY(object), g_value_get_string(value));
        break;
    case PROP_ENTRY_TYPE:
        /* construct-only */
        priv->entry_type = g_value_get_int(value);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

static void
nmt_mac_entry_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
    NmtMacEntryPrivate *priv = NMT_MAC_ENTRY_GET_PRIVATE(object);

    switch (prop_id) {
    case PROP_MAC_LENGTH:
        g_value_set_int(value, priv->mac_length);
        break;
    case PROP_MAC_ADDRESS:
        g_value_set_string(value,
                           nm_str_not_empty(nmt_newt_entry_get_text(NMT_NEWT_ENTRY(object))));
        break;
    case PROP_ENTRY_TYPE:
        g_value_set_int(value, priv->entry_type);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

static void
nmt_mac_entry_class_init(NmtMacEntryClass *entry_class)
{
    GObjectClass *object_class = G_OBJECT_CLASS(entry_class);

    g_type_class_add_private(entry_class, sizeof(NmtMacEntryPrivate));

    /* virtual methods */
    object_class->notify       = nmt_mac_entry_notify;
    object_class->set_property = nmt_mac_entry_set_property;
    object_class->get_property = nmt_mac_entry_get_property;

    /**
     * NmtMacEntry:mac-length:
     *
     * The length in bytes of the hardware address type the entry
     * accepts: either %ETH_ALEN or %INFINIBAND_ALEN.
     */
    g_object_class_install_property(object_class,
                                    PROP_MAC_LENGTH,
                                    g_param_spec_int("mac-length",
                                                     "",
                                                     "",
                                                     0,
                                                     INFINIBAND_ALEN,
                                                     ETH_ALEN,
                                                     G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
    /**
     * NmtMacEntry:mac-address:
     *
     * The MAC address, as a string (as with the various #NMSetting
     * "mac-address" properties).
     */
    g_object_class_install_property(
        object_class,
        PROP_MAC_ADDRESS,
        g_param_spec_string("mac-address",
                            "",
                            "",
                            NULL,
                            G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
    /**
     * NmtMacEntry:entry-type:
     *
     * The type of the #NmtMacEntry. Can be either used for plain
     * MAC addresses or for the extended format for cloned MAC addresses.
     */
    g_object_class_install_property(
        object_class,
        PROP_ENTRY_TYPE,
        g_param_spec_int("entry-type",
                         "",
                         "",
                         NMT_MAC_ENTRY_TYPE_MAC,
                         NMT_MAC_ENTRY_TYPE_CLONED,
                         NMT_MAC_ENTRY_TYPE_MAC,
                         G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
}