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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 <thread>
#include <unordered_map>
#include "lock.hh"
#include "mplexer.hh"
#include "sstuff.hh"
namespace dnsdist
{
class NetworkListener
{
public:
NetworkListener();
NetworkListener(const NetworkListener&) = delete;
NetworkListener(NetworkListener&&) = delete;
NetworkListener& operator=(const NetworkListener&) = delete;
NetworkListener& operator=(NetworkListener&&) = delete;
~NetworkListener();
using EndpointID = uint16_t;
using NetworkDatagramCB = std::function<void(EndpointID endpoint, std::string&& dgram, const std::string& from)>;
bool addUnixListeningEndpoint(const std::string& path, EndpointID endpointID, NetworkDatagramCB callback);
void start();
void runOnce(timeval& now, uint32_t timeout);
private:
struct ListenerData
{
ListenerData();
std::unique_ptr<FDMultiplexer> d_mplexer;
std::unordered_map<std::string, Socket> d_sockets;
std::atomic<bool> d_running{false};
std::atomic<bool> d_exiting{false};
};
static void readCB(int desc, FDMultiplexer::funcparam_t& param);
static void mainThread(std::shared_ptr<ListenerData>& data);
static void runOnce(ListenerData& data, timeval& now, uint32_t timeout);
struct CBData
{
NetworkDatagramCB d_cb;
EndpointID d_endpoint;
};
std::shared_ptr<ListenerData> d_data;
};
class NetworkEndpoint
{
public:
NetworkEndpoint(const std::string& path);
bool send(const std::string_view& payload) const;
private:
Socket d_socket;
};
}
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