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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 "iputils.hh"
struct ProxyProtocolValue
{
std::string content;
uint8_t type;
bool operator==(const ProxyProtocolValue& rhs) const
{
return type == rhs.type && content == rhs.content;
}
enum class Types : uint8_t { PP_TLV_ALPN = 0x01, PP_TLV_SSL = 0x20 };
};
static const size_t s_proxyProtocolMinimumHeaderSize = 16;
std::string makeLocalProxyHeader();
std::string makeProxyHeader(bool tcp, const ComboAddress& source, const ComboAddress& destination, const std::vector<ProxyProtocolValue>& values);
/* returns: number of bytes consumed (positive) after successful parse
or number of bytes missing (negative)
or unfixable parse error (0)*/
template<typename Container> ssize_t isProxyHeaderComplete(const Container& header, bool* proxy=nullptr, bool* tcp=nullptr, size_t* addrSizeOut=nullptr, uint8_t* protocolOut=nullptr);
/* returns: number of bytes consumed (positive) after successful parse
or number of bytes missing (negative)
or unfixable parse error (0)*/
template<typename Container> ssize_t parseProxyHeader(const Container& header, bool& proxy, ComboAddress& source, ComboAddress& destination, bool& tcp, std::vector<ProxyProtocolValue>& values);
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