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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 <memory>
#include "config.h"
#include "channel.hh"
#include "iputils.hh"
#include "libssl.hh"
#include "noinitvector.hh"
#include "stat_t.hh"
#include "dnsdist-idstate.hh"
struct DOH3ServerConfig;
struct DownstreamState;
#ifdef HAVE_DNS_OVER_HTTP3
#include "doq-common.hh"
struct DOH3Frontend
{
DOH3Frontend();
DOH3Frontend(const DOH3Frontend&) = delete;
DOH3Frontend(DOH3Frontend&&) = delete;
DOH3Frontend& operator=(const DOH3Frontend&) = delete;
DOH3Frontend& operator=(DOH3Frontend&&) = delete;
~DOH3Frontend();
void setup();
void reloadCertificates();
std::unique_ptr<DOH3ServerConfig> d_server_config;
ComboAddress d_local;
#ifdef __linux__
// On Linux this gives us 128k pending queries (default is 8192 queries),
// which should be enough to deal with huge spikes
uint32_t d_internalPipeBufferSize{1024 * 1024};
#else
uint32_t d_internalPipeBufferSize{0};
#endif
dnsdist::doq::QuicheParams d_quicheParams;
pdns::stat_t d_doh3UnsupportedVersionErrors{0}; // Unsupported protocol version errors
pdns::stat_t d_doh3InvalidTokensReceived{0}; // Discarded received tokens
pdns::stat_t d_validResponses{0}; // Valid responses sent
pdns::stat_t d_errorResponses{0}; // Empty responses (no backend, drops, invalid queries, etc.)
};
struct DOH3Unit
{
DOH3Unit(PacketBuffer&& query_) :
query(std::move(query_))
{
}
DOH3Unit(const DOH3Unit&) = delete;
DOH3Unit& operator=(const DOH3Unit&) = delete;
InternalQueryState ids;
PacketBuffer query;
PacketBuffer response;
PacketBuffer serverConnID;
std::shared_ptr<DownstreamState> downstream{nullptr};
DOH3ServerConfig* dsc{nullptr};
uint64_t streamID{0};
size_t proxyProtocolPayloadSize{0};
uint16_t status_code{200};
/* whether the query was re-sent to the backend over
TCP after receiving a truncated answer over UDP */
bool tcp{false};
};
using DOH3UnitUniquePtr = std::unique_ptr<DOH3Unit>;
struct CrossProtocolQuery;
struct DNSQuestion;
std::unique_ptr<CrossProtocolQuery> getDOH3CrossProtocolQueryFromDQ(DNSQuestion& dnsQuestion, bool isResponse);
void doh3Thread(ClientState* clientState);
#else
struct DOH3Unit
{
};
struct DOH3Frontend
{
DOH3Frontend()
{
}
void setup()
{
}
};
#endif
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