mirror of
https://github.com/ntop/ntopng.git
synced 2026-05-06 12:15:15 +00:00
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/*
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*
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* (C) 2013-25 - ntop.org
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include "ntop_includes.h"
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/* ************************************ */
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HostHash::HostHash(NetworkInterface *_iface, u_int _num_hashes,
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u_int _max_hash_size)
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: GenericHash(_iface, _num_hashes, _max_hash_size, "HostHash") {
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if(trace_new_delete) ntop->getTrace()->traceEvent(TRACE_NORMAL, "[new] %s", __FILE__);
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num_http_hosts = 0;
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}
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/* ************************************ */
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Host *HostHash::get(u_int16_t vlanId, IpAddress *key, Mac *mac,
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bool is_inline_call, u_int16_t observation_point_id) {
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u_int32_t hash = (key->key() % num_hashes);
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/* Check if MAC address needs to be used in host key */
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if (ntop->getPrefs()->useMacAddressInFlowKey() == false) mac = NULL;
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if (table[hash] == NULL) {
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return (NULL);
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} else {
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Host *head;
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if (!is_inline_call) locks[hash]->rdlock(__FILE__, __LINE__);
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head = (Host *)table[hash];
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while (head != NULL) {
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if ((!head->idle()) && (head->get_vlan_id() == vlanId) &&
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(head->get_observation_point_id() == observation_point_id) &&
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(head->get_ip() != NULL) && (head->get_ip()->compare(key) == 0) &&
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((mac == NULL) || (mac == head->getMac())))
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break;
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else
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head = (Host *)head->next();
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}
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if (!is_inline_call) locks[hash]->unlock(__FILE__, __LINE__);
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return (head);
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}
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}
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/* ************************************ */
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void HostHash::incNumHTTPEntries() {
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m.lock(__FILE__, __LINE__);
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num_http_hosts++;
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m.unlock(__FILE__, __LINE__);
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}
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/* ************************************ */
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void HostHash::decNumHTTPEntries() {
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m.lock(__FILE__, __LINE__);
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if (num_http_hosts > 0)
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num_http_hosts--;
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else
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ntop->getTrace()->traceEvent(
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TRACE_WARNING, "Internal error: [num_http_hosts=%u]", num_http_hosts);
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m.unlock(__FILE__, __LINE__);
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}
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