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/*
*
* (C) 2013-14 - 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"
/* ************************************ */
HostHash::HostHash(NetworkInterface *_iface, u_int _num_hashes, u_int _max_hash_size) : GenericHash(_iface, _num_hashes, _max_hash_size) {
;
}
/* ************************************ */
Host* HostHash::get(u_int16_t vlanId, IpAddress *key) {
u_int32_t hash = (key->key() % num_hashes);
if(table[hash] == NULL) {
return(NULL);
} else {
Host *head;
locks[hash]->lock(__FILE__, __LINE__);
head = (Host*)table[hash];
while(head != NULL) {
if((!head->idle())
&& (head->get_vlan_id() == vlanId)
&& (head->get_ip() != NULL)
&& (head->get_ip()->compare(key) == 0))
break;
else
head = (Host*)head->next();
}
locks[hash]->unlock(__FILE__, __LINE__);
return(head);
}
}
/* ************************************ */
Host* HostHash::get(u_int16_t vlanId, const u_int8_t mac[6]) {
u_int32_t hash = 0;
for(int i=0; i<6; i++) hash += mac[i] << (i+1);
hash %= num_hashes;
if(table[hash] == NULL) {
return(NULL);
} else {
Host *head;
locks[hash]->lock(__FILE__, __LINE__);
head = (Host*)table[hash];
while(head != NULL) {
if((!head->idle())
&& (head->get_ip() == NULL /* This is not a L2 host */)
// && (vlanId == 0 /* any vlan */ || head->get_vlan_id() == vlanId)
&& (head->get_vlan_id() == vlanId)
&& (memcmp(mac, head->get_mac(), 6) == 0))
break;
else
head = (Host*)head->next();
}
locks[hash]->unlock(__FILE__, __LINE__);
return(head);
}
}
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