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/*
* This file is part of PowerDNS or weakforced.
* 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 3 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 "sholder.hh"
#include "iputils.hh"
#include "sodcrypto.hh"
#include "wforce-sibling.hh"
class WforceReplication {
public:
WforceReplication() {
d_sodnonce.init();
}
virtual ~WforceReplication() = default;
virtual void receiveReplicationOperationsTCP(const ComboAddress& local);
virtual void receiveReplicationOperations(const ComboAddress& local);
virtual void startReplicationWorkerThreads();
virtual void encryptMsg(const std::string& msg, std::string& packet);
virtual void encryptMsgWithKey(const std::string& msg, std::string& packet, const std::string& key, SodiumNonce& nonce,
std::mutex& mutex);
virtual bool decryptMsg(const char* buf, size_t len, std::string& msg);
void setMaxSiblingRecvQueueSize(size_t size);
void setNumSiblingThreads(unsigned int num_threads) { d_num_sibling_threads = num_threads; }
GlobalStateHolder<vector<shared_ptr<Sibling>>>& getSiblings() { return d_siblings; }
virtual void replicateOperation(const ReplicationOperation& rep_op);
void setEncryptionKey(const std::string& key) { d_key = key; }
std::string getEncryptionKey() const { return d_key; }
protected:
virtual bool checkConnFromSibling(const ComboAddress& remote, shared_ptr<Sibling>& recv_sibling);
virtual void parseTCPReplication(std::shared_ptr<Socket> sockp, const ComboAddress& remote, std::shared_ptr<Sibling> recv_sibling);
virtual void parseReceivedReplicationMsg(const std::string& msg, const ComboAddress& remote, std::shared_ptr<Sibling> recv_sibling);
struct SiblingQueueItem {
std::string msg;
ComboAddress remote;
std::shared_ptr<Sibling> recv_sibling;
};
GlobalStateHolder<vector<shared_ptr<Sibling>>> d_siblings;
SodiumNonce d_sodnonce;
std::string d_key; // The default key to use if no per-sibling key
std::mutex d_sod_mutx;
std::mutex d_sibling_queue_mutex;
std::queue<SiblingQueueItem> d_sibling_queue;
std::condition_variable d_sibling_queue_cv;
size_t d_max_sibling_queue_size = 5000;
unsigned int d_num_sibling_threads = 2;
};
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