pdns/anadns.hh

   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 #ifndef PDNS_ANADNS_HH
  23 #define PDNS_ANADNS_HH
  24 #include <boost/tuple/tuple.hpp>
  25 #include <boost/tuple/tuple_comparison.hpp>
  26 #include <string>
  27 #include <netinet/ip.h>
  28 #include <netinet/udp.h>
  29 #include "dnsparser.hh"
  30 #include "iputils.hh"
  31 #include "namespaces.hh"
  32
  33 struct QuestionIdentifier
  34 {
  35   QuestionIdentifier()
  36   {}
  37
  38   bool operator<(const QuestionIdentifier& rhs) const
  39   {
  40     return
  41       tie(d_id,         d_qtype,     d_source,     d_dest,     d_qname) <
  42       tie(rhs.d_id, rhs.d_qtype, rhs.d_source, rhs.d_dest, rhs.d_qname);
  43   }
  44
  45
  46   // the canonical direction is that of the question
  47   static QuestionIdentifier create(const ComboAddress& src, const ComboAddress& dst, const struct dnsheader& header, const DNSName& qname, uint16_t qtype)
  48   {
  49     QuestionIdentifier ret;
  50
  51     if(header.qr) {
  52       ret.d_source = dst;
  53       ret.d_dest = src;
  54     }
  55     else {
  56       ret.d_source = src;
  57       ret.d_dest = dst;
  58     }
  59     ret.d_qname=qname;
  60     ret.d_qtype=qtype;
  61     ret.d_id=ntohs(header.id);
  62     return ret;
  63   }
  64
  65   // the canonical direction is that of the question
  66   static QuestionIdentifier create(const ComboAddress& src, const ComboAddress& dst, const MOADNSParser& mdp)
  67   {
  68     return create(src, dst, mdp.d_header, mdp.d_qname, mdp.d_qtype);
  69   }
  70
  71
  72   ComboAddress d_source, d_dest;
  73
  74   DNSName d_qname;
  75   uint16_t d_qtype;
  76   uint16_t d_id;
  77 };
  78
  79 inline ostream& operator<<(ostream &s, const QuestionIdentifier& qi)
  80 {
  81   s<< "'"<<qi.d_qname<<"|"<<DNSRecordContent::NumberToType(qi.d_qtype)<<"', with id " << qi.d_id <<" from "<<qi.d_source.toStringWithPort();
  82
  83   s<<" to " << qi.d_dest.toStringWithPort();
  84   return s;
  85 }
  86
  87
  88 #endif