/**
 * \file src/filter/operations/mac.c
 * \author Michal Sedlak <xsedla0v@stud.fit.vutbr.cz>
 * \brief MAC address operations implementation file
 * \date 2020
 */

/*
 * Copyright (C) 2020 CESNET, z.s.p.o.
 *
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 * modification, are permitted provided that the following conditions
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 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of the Company nor the names of its contributors
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * ALTERNATIVELY, provided that this notice is retained in full, this
 * product may be distributed under the terms of the GNU General Public
 * License (GPL) version 2 or later, in which case the provisions
 * of the GPL apply INSTEAD OF those given above.
 *
 * This software is provided ``as is'', and any express or implied
 * warranties, including, but not limited to, the implied warranties of
 * merchantability and fitness for a particular purpose are disclaimed.
 * In no event shall the company or contributors be liable for any
 * direct, indirect, incidental, special, exemplary, or consequential
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 * interruption) however caused and on any theory of liability, whether
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 */

#include "mac.h"
#include "../values.h"

static inline bool
mac_equals(fds_filter_mac_t *left, fds_filter_mac_t *right)
{
    return memcmp(left->addr, right->addr, 6) == 0;
}

void
eq_mac(fds_filter_value_u *left, fds_filter_value_u *right, fds_filter_value_u *result)
{
    result->b = mac_equals(&left->mac, &right->mac);
}

void
ne_mac(fds_filter_value_u *left, fds_filter_value_u *right, fds_filter_value_u *result)
{
    result->b = !mac_equals(&left->mac, &right->mac);
}

void
mac_in_list(fds_filter_value_u *item, fds_filter_value_u *list, fds_filter_value_u *result)
{
    result->b = false;
    for (uint64_t i = 0; i < list->list.len; i++) {
        if (mac_equals(&list->list.items[i].mac, &item->mac)) {
            result->b = true;
            return;
        }
    }
}

void
cast_mac_list_to_bool(fds_filter_value_u *operand, fds_filter_value_u *result)
{
    result->b = operand->list.len > 0;
}

void
cast_mac_to_bool(fds_filter_value_u *_1, fds_filter_value_u *result)
{
    (void) _1;
    result->b = true; // ??
}

void
destroy_mac_list(fds_filter_value_u *operand)
{
    free(operand->list.items);
}

const fds_filter_op_s mac_operations[] = {
    FDS_FILTER_DEF_BINARY_OP(FDS_FDT_MAC, "", FDS_FDT_MAC, eq_mac, FDS_FDT_BOOL),
    FDS_FILTER_DEF_BINARY_OP(FDS_FDT_MAC, "==", FDS_FDT_MAC, eq_mac, FDS_FDT_BOOL),
    FDS_FILTER_DEF_BINARY_OP(FDS_FDT_MAC, "!=", FDS_FDT_MAC, ne_mac, FDS_FDT_BOOL),

    FDS_FILTER_DEF_BINARY_OP(FDS_FDT_MAC, "in", FDS_FDT_LIST | FDS_FDT_MAC, mac_in_list, FDS_FDT_BOOL),

    FDS_FILTER_DEF_CAST(FDS_FDT_MAC, cast_mac_to_bool, FDS_FDT_BOOL),
    FDS_FILTER_DEF_CAST(FDS_FDT_LIST | FDS_FDT_MAC, cast_mac_list_to_bool, FDS_FDT_BOOL),

    FDS_FILTER_DEF_DESTRUCTOR(FDS_FDT_MAC | FDS_FDT_LIST, destroy_mac_list),

    FDS_FILTER_END_OP_LIST
};
