mirror of
https://github.com/ntop/ntopng.git
synced 2026-05-21 01:54:34 +00:00
108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
/*
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*
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* (C) 2013-16 - 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, u_int _max_hash_size) : GenericHash(_iface, _num_hashes, _max_hash_size) {
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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) {
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u_int32_t hash = (key->key() % num_hashes);
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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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locks[hash]->lock(__FILE__, __LINE__);
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head = (Host*)table[hash];
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while(head != NULL) {
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if((!head->idle())
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&& (head->get_vlan_id() == vlanId)
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&& (head->get_ip() != NULL)
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&& (head->get_ip()->compare(key) == 0))
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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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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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Host* HostHash::get(u_int16_t vlanId, const u_int8_t mac[6]) {
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u_int32_t hash = 0;
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for(int i=0; i<6; i++) hash += mac[i] << (i+1);
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hash %= num_hashes;
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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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locks[hash]->lock(__FILE__, __LINE__);
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head = (Host*)table[hash];
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while(head != NULL) {
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if((!head->idle())
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&& (head->get_ip() == NULL /* This is not a L2 host */)
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// && (vlanId == 0 /* any vlan */ || head->get_vlan_id() == vlanId)
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&& (head->get_vlan_id() == vlanId)
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&& (memcmp(mac, head->get_mac(), 6) == 0))
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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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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(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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