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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.
*/
#include <protozero/pbf_builder.hpp>
#include <protozero/pbf_message.hpp>
#include "protozero-helpers.hh"
#include "logging.hh"
#include "version.hh"
#include "rec-nsspeeds.hh"
enum class PBNSSpeedDump : protozero::pbf_tag_type
{
required_string_version = 1,
required_string_identity = 2,
required_uint64_protocolVersion = 3,
required_int64_time = 4,
required_string_type = 5,
repeated_message_nsspeedEntry = 6,
};
enum class PBNSSpeedEntry : protozero::pbf_tag_type
{
required_bytes_name = 1,
required_int64_lastgets = 2,
required_int64_lastgetus = 3,
repeated_message_map = 4,
};
enum class PBNSSpeedMap : protozero::pbf_tag_type
{
required_bytes_address = 1,
required_float_val = 2,
required_int32_last = 3,
};
template <typename T, typename U>
void nsspeeds_t::getPBEntry(T& message, U& entry)
{
if (!entry.d_name.empty()) {
message.add_bytes(PBNSSpeedEntry::required_bytes_name, entry.d_name.toString());
}
message.add_int64(PBNSSpeedEntry::required_int64_lastgets, entry.d_lastget.tv_sec);
message.add_int64(PBNSSpeedEntry::required_int64_lastgetus, entry.d_lastget.tv_usec);
for (const auto& [address, collection] : entry.d_collection) {
protozero::pbf_builder<PBNSSpeedMap> map(message, PBNSSpeedEntry::repeated_message_map);
encodeComboAddress(map, PBNSSpeedMap::required_bytes_address, address);
map.add_float(PBNSSpeedMap::required_float_val, collection.d_val);
map.add_int32(PBNSSpeedMap::required_int32_last, collection.d_last);
}
}
size_t nsspeeds_t::getPB(const string& serverID, size_t maxSize, std::string& ret) const
{
auto log = g_slog->withName("syncres")->withValues("maxSize", Logging::Loggable(maxSize));
log->info(Logr::Info, "Producing nsspeed dump");
// A observed average record size is 60;
size_t estimate = maxSize == 0 ? size() * 60 : maxSize + 4096; // We may overshoot (will be rolled back)
protozero::pbf_builder<PBNSSpeedDump> full(ret);
full.add_string(PBNSSpeedDump::required_string_version, getPDNSVersion());
full.add_string(PBNSSpeedDump::required_string_identity, serverID);
full.add_uint64(PBNSSpeedDump::required_uint64_protocolVersion, 1);
full.add_int64(PBNSSpeedDump::required_int64_time, time(nullptr));
full.add_string(PBNSSpeedDump::required_string_type, "PBNSSpeedDump");
size_t count = 0;
ret.reserve(estimate);
for (const auto& entry : *this) {
protozero::pbf_builder<PBNSSpeedEntry> message(full, PBNSSpeedDump::repeated_message_nsspeedEntry);
getPBEntry(message, entry);
if (maxSize > 0 && ret.size() > maxSize) {
message.rollback();
log->info(Logr::Info, "Produced nsspeed dump (max size reached)", "size", Logging::Loggable(ret.size()), "count", Logging::Loggable(count));
return count;
}
++count;
}
log->info(Logr::Info, "Produced nsspeed dump", "size", Logging::Loggable(ret.size()), "count", Logging::Loggable(count));
return count;
}
template <typename T>
bool nsspeeds_t::putPBEntry(time_t cutoff, T& message)
{
DecayingEwmaCollection entry{{}};
while (message.next()) {
switch (message.tag()) {
case PBNSSpeedEntry::required_bytes_name:
entry.d_name = DNSName(message.get_bytes());
break;
case PBNSSpeedEntry::required_int64_lastgets:
entry.d_lastget.tv_sec = message.get_int64();
break;
case PBNSSpeedEntry::required_int64_lastgetus:
entry.d_lastget.tv_usec = message.get_int64();
break;
case PBNSSpeedEntry::repeated_message_map: {
protozero::pbf_message<PBNSSpeedMap> map = message.get_message();
ComboAddress address;
float val{};
int last{};
while (map.next()) {
switch (map.tag()) {
case PBNSSpeedMap::required_bytes_address:
decodeComboAddress(map, address);
break;
case PBNSSpeedMap::required_float_val:
val = map.get_float();
break;
case PBNSSpeedMap::required_int32_last:
last = map.get_int32();
break;
}
}
entry.insert(address, val, last);
break;
}
}
}
if (!entry.stale(cutoff)) {
return insert(std::move(entry)).second;
}
return false;
}
size_t nsspeeds_t::putPB(time_t cutoff, const std::string& pbuf)
{
auto log = g_slog->withName("syncres")->withValues("size", Logging::Loggable(pbuf.size()));
log->info(Logr::Debug, "Processing nsspeed dump");
protozero::pbf_message<PBNSSpeedDump> full(pbuf);
size_t count = 0;
size_t inserted = 0;
try {
bool protocolVersionSeen = false;
bool typeSeen = false;
while (full.next()) {
switch (full.tag()) {
case PBNSSpeedDump::required_string_version: {
auto version = full.get_string();
log = log->withValues("version", Logging::Loggable(version));
break;
}
case PBNSSpeedDump::required_string_identity: {
auto identity = full.get_string();
log = log->withValues("identity", Logging::Loggable(identity));
break;
}
case PBNSSpeedDump::required_uint64_protocolVersion: {
auto protocolVersion = full.get_uint64();
log = log->withValues("protocolVersion", Logging::Loggable(protocolVersion));
if (protocolVersion != 1) {
throw std::runtime_error("Protocol version mismatch");
}
protocolVersionSeen = true;
break;
}
case PBNSSpeedDump::required_int64_time: {
auto time = full.get_int64();
log = log->withValues("time", Logging::Loggable(time));
break;
}
case PBNSSpeedDump::required_string_type: {
auto type = full.get_string();
if (type != "PBNSSpeedDump") {
throw std::runtime_error("Data type mismatch");
}
typeSeen = true;
break;
}
case PBNSSpeedDump::repeated_message_nsspeedEntry: {
if (!protocolVersionSeen || !typeSeen) {
throw std::runtime_error("Required field missing");
}
protozero::pbf_message<PBNSSpeedEntry> message = full.get_message();
if (putPBEntry(cutoff, message)) {
++inserted;
}
++count;
break;
}
}
}
log->info(Logr::Info, "Processed nsspeed dump", "processed", Logging::Loggable(count), "inserted", Logging::Loggable(inserted));
return inserted;
}
catch (const std::runtime_error& e) {
log->error(Logr::Error, e.what(), "Runtime exception processing cache dump");
}
catch (const std::exception& e) {
log->error(Logr::Error, e.what(), "Exception processing cache dump");
}
catch (...) {
log->error(Logr::Error, "Other exception processing cache dump");
}
return 0;
}
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