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/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <deque>
#include <map>
#include "lock.hh"
#include "tcpiohandler.hh"
#include "uuid-utils.hh"
class TLSSessionCache
{
public:
TLSSessionCache()
{
}
void putSessions(const boost::uuids::uuid& backendID, time_t now, std::vector<std::unique_ptr<TLSSession>>&& sessions);
std::unique_ptr<TLSSession> getSession(const boost::uuids::uuid& backendID, time_t now);
static void setCleanupDelay(time_t delay)
{
s_cleanupDelay = delay;
}
static void setSessionValidity(time_t validity)
{
s_sessionValidity = validity;
}
static void setMaxTicketsPerBackend(uint16_t max)
{
s_maxSessionsPerBackend = max;
}
size_t getSize();
private:
static time_t s_cleanupDelay;
static time_t s_sessionValidity;
static uint16_t s_maxSessionsPerBackend;
struct BackendEntry
{
std::deque<std::unique_ptr<TLSSession>> d_sessions;
time_t d_lastUsed{0};
};
struct CacheData
{
// do we need to shard this?
std::map<boost::uuids::uuid, BackendEntry> d_sessions;
time_t d_nextCleanup{0};
};
LockGuarded<CacheData> d_data;
void cleanup(time_t now, LockGuardedHolder<CacheData>& data);
};
extern TLSSessionCache g_sessionCache;
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