76 lines
1.4 KiB
C++
76 lines
1.4 KiB
C++
/*
|
|
* \brief Cache for received ARP information
|
|
* \author Martin Stein
|
|
* \date 2016-08-19
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2016 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
/* local includes */
|
|
#include <arp_cache.h>
|
|
|
|
using namespace Net;
|
|
using namespace Genode;
|
|
|
|
|
|
/*********************
|
|
** Arp_cache_entry **
|
|
*********************/
|
|
|
|
Arp_cache_entry::Arp_cache_entry(Ipv4_address const &ip,
|
|
Mac_address const &mac)
|
|
:
|
|
_ip(ip), _mac(mac)
|
|
{ }
|
|
|
|
|
|
bool Arp_cache_entry::_higher(Ipv4_address const &ip) const
|
|
{
|
|
return memcmp(ip.addr, _ip.addr, sizeof(_ip.addr)) > 0;
|
|
}
|
|
|
|
|
|
Arp_cache_entry const &
|
|
Arp_cache_entry::find_by_ip(Ipv4_address const &ip) const
|
|
{
|
|
if (ip == _ip) {
|
|
return *this; }
|
|
|
|
Arp_cache_entry const *const entry = child(_higher(ip));
|
|
if (!entry) {
|
|
throw Arp_cache::No_match(); }
|
|
|
|
return entry->find_by_ip(ip);
|
|
}
|
|
|
|
|
|
/***************
|
|
** Arp_cache **
|
|
***************/
|
|
|
|
void Arp_cache::new_entry(Ipv4_address const &ip, Mac_address const &mac)
|
|
{
|
|
if (_entries[_curr].constructed()) { remove(&(*_entries[_curr])); }
|
|
_entries[_curr].construct(ip, mac);
|
|
insert(&(*_entries[_curr]));
|
|
if (_curr < NR_OF_ENTRIES - 1) {
|
|
_curr++;
|
|
} else {
|
|
_curr = 0;
|
|
};
|
|
}
|
|
|
|
|
|
Arp_cache_entry const &Arp_cache::find_by_ip(Ipv4_address const &ip) const
|
|
{
|
|
if (!first()) {
|
|
throw No_match(); }
|
|
|
|
return first()->find_by_ip(ip);
|
|
}
|