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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 <string>
#include <map>
#include <optional>
#include <vector>
#include <inttypes.h>
#include <sys/un.h>
#include <signal.h>
#include <pthread.h>
#include "iputils.hh"
#include "dnsname.hh"
#include "sholder.hh"
#include <atomic>
extern GlobalStateHolder<SuffixMatchNode> g_dontThrottleNames;
extern GlobalStateHolder<NetmaskGroup> g_dontThrottleNetmasks;
/** this class is used both to send and answer channel commands to the PowerDNS Recursor */
class RecursorControlChannel
{
public:
RecursorControlChannel();
~RecursorControlChannel();
int listen(const std::string& filename);
void connect(const std::string& path, const std::string& filename);
uint64_t getStat(const std::string& name);
struct Answer
{
Answer& operator+=(const Answer& rhs)
{
if (d_ret == 0 && rhs.d_ret != 0) {
d_ret = rhs.d_ret;
}
d_str += rhs.d_str;
return *this;
}
int d_ret{0};
std::string d_str;
};
void send(int remote, const Answer&, unsigned int timeout = 5, int fd_to_pass = -1);
RecursorControlChannel::Answer recv(int fd, unsigned int timeout = 5);
int d_fd;
static std::atomic<bool> stop;
private:
struct sockaddr_un d_local;
};
class RecursorControlParser
{
public:
RecursorControlParser()
{
}
static void nop(void) {}
typedef void func_t(void);
RecursorControlChannel::Answer getAnswer(int s, const std::string& question, func_t** func);
};
enum class StatComponent
{
API,
Carbon,
RecControl,
SNMP
};
struct StatsMapEntry
{
std::string d_prometheusName;
std::string d_value;
};
class PrefixDashNumberCompare
{
private:
static std::pair<std::string, std::string> prefixAndTrailingNum(const std::string& a);
public:
bool operator()(const std::string& a, const std::string& b) const;
};
typedef std::map<std::string, StatsMapEntry, PrefixDashNumberCompare> StatsMap;
StatsMap getAllStatsMap(StatComponent component);
struct CarbonConfig
{
std::string hostname;
std::string instance_name;
std::string namespace_name;
std::vector<std::string> servers;
};
extern GlobalStateHolder<CarbonConfig> g_carbonConfig;
std::vector<std::pair<DNSName, uint16_t>>* pleaseGetQueryRing();
std::vector<std::pair<DNSName, uint16_t>>* pleaseGetServfailQueryRing();
std::vector<std::pair<DNSName, uint16_t>>* pleaseGetBogusQueryRing();
std::vector<ComboAddress>* pleaseGetRemotes();
std::vector<ComboAddress>* pleaseGetServfailRemotes();
std::vector<ComboAddress>* pleaseGetBogusRemotes();
std::vector<ComboAddress>* pleaseGetLargeAnswerRemotes();
std::vector<ComboAddress>* pleaseGetTimeouts();
DNSName getRegisteredName(const DNSName& dom);
std::atomic<unsigned long>* getDynMetric(const std::string& str, const std::string& prometheusName);
std::optional<uint64_t> getStatByName(const std::string& name);
bool isStatDisabled(StatComponent component, const std::string& name);
void disableStat(StatComponent component, const string& name);
void disableStats(StatComponent component, const string& stats);
void registerAllStats();
void doExitGeneric(bool nicely);
void doExit();
void doExitNicely();
RecursorControlChannel::Answer doQueueReloadLuaScript(vector<string>::const_iterator begin, vector<string>::const_iterator end);
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