/*
 *
 * (C) 2013-25 - ntop.org
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */

#include "ntop_includes.h"

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

MacHash::MacHash(NetworkInterface *_iface, u_int _num_hashes,
                 u_int _max_hash_size)
    : GenericHash(_iface, _num_hashes, _max_hash_size, "MacHash") {
  if(trace_new_delete) ntop->getTrace()->traceEvent(TRACE_NORMAL, "[new] %s", __FILE__);
}

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

Mac *MacHash::get(const u_int8_t mac[6], bool is_inline_call) {
  if (mac == NULL)
    return (NULL);
  else {
    u_int32_t hash = Utils::macHash((u_int8_t *)mac);

    hash %= num_hashes;

    if (table[hash] == NULL) {
      return (NULL);
    } else {
      Mac *head;

      if (!is_inline_call) locks[hash]->rdlock(__FILE__, __LINE__);

      head = (Mac *)table[hash];

      while (head != NULL) {
        if ((!head->idle()) && head->equal(mac))
          break;
        else
          head = (Mac *)head->next();
      }

      if (!is_inline_call) locks[hash]->unlock(__FILE__, __LINE__);

      return (head);
    }
  }
}