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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/
*
* 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, see <http://www.gnu.org/licenses/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
#ifndef ZT_NEIGHBORDISCOVERY_HPP
#define ZT_NEIGHBORDISCOVERY_HPP
#include "../node/Hashtable.hpp"
#include "../node/MAC.hpp"
#include "../node/InetAddress.hpp"
#define ZT_ND_QUERY_INTERVAL 2000
#define ZT_ND_QUERY_MAX_TTL 5000
#define ZT_ND_EXPIRE 600000
namespace ZeroTier {
class NeighborDiscovery
{
public:
NeighborDiscovery();
/**
* Set a local IP entry that we should respond to Neighbor Requests withPrefix64k
*
* @param mac Our local MAC address
* @param ip Our IPv6 address
*/
void addLocal(const sockaddr_storage &address, const MAC &mac);
/**
* Delete a local IP entry or cached Neighbor entry
*
* @param address IPv6 address to remove
*/
void remove(const sockaddr_storage &address);
sockaddr_storage processIncomingND(const uint8_t *nd, unsigned int len, const sockaddr_storage &localIp, uint8_t *response, unsigned int &responseLen, MAC &responseDest);
MAC query(const MAC &localMac, const sockaddr_storage &localIp, const sockaddr_storage &targetIp, uint8_t *query, unsigned int &queryLen, MAC &queryDest);
private:
struct _NDEntry
{
_NDEntry() : lastQuerySent(0), lastResponseReceived(0), mac(), local(false) {}
uint64_t lastQuerySent;
uint64_t lastResponseReceived;
MAC mac;
bool local;
};
Hashtable<InetAddress, _NDEntry> _cache;
uint64_t _lastCleaned;
};
} // namespace ZeroTier
#endif
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