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  1. /*
  2. * This file is part of PowerDNS or dnsdist.
  3. * Copyright -- PowerDNS.COM B.V. and its contributors
  4. *
  5. * This program is free software; you can redistribute it and/or modify
  6. * it under the terms of version 2 of the GNU General Public License as
  7. * published by the Free Software Foundation.
  8. *
  9. * In addition, for the avoidance of any doubt, permission is granted to
  10. * link this program with OpenSSL and to (re)distribute the binaries
  11. * produced as the result of such linking.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21. */
  22. #pragma once
  23. #include <iputils.hh>
  24. struct ProxyProtocolValue
  25. {
  26. std::string content;
  27. uint8_t type;
  28. };
  29. static const size_t s_proxyProtocolMinimumHeaderSize = 16;
  30. std::string makeLocalProxyHeader();
  31. std::string makeProxyHeader(bool tcp, const ComboAddress& source, const ComboAddress& destination, const std::vector<ProxyProtocolValue>& values);
  32. /* returns: number of bytes consumed (positive) after successful parse
  33. or number of bytes missing (negative)
  34. or unfixable parse error (0)*/
  35. ssize_t isProxyHeaderComplete(const std::string& header, bool* proxy=nullptr, bool* tcp=nullptr, size_t* addrSizeOut=nullptr, uint8_t* protocolOut=nullptr);
  36. /* returns: number of bytes consumed (positive) after successful parse
  37. or number of bytes missing (negative)
  38. or unfixable parse error (0)*/
  39. ssize_t parseProxyHeader(const std::string& payload, bool& proxy, ComboAddress& source, ComboAddress& destination, bool& tcp, std::vector<ProxyProtocolValue>& values);