pdns/signingpipe.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 #pragma once
  23 #include <stdio.h>
  24 #include <thread>
  25 #include <vector>
  26
  27 #include "dnsseckeeper.hh"
  28 #include "dns.hh"
  29
  30 void writeLStringToSocket(int fd, const string& msg);
  31 bool readLStringFromSocket(int fd, string& msg);
  32
  33 /** input: DNSZoneRecords ordered in qname,qtype (we emit a signature chunk on a break)
  34  *  output: "chunks" of those very same DNSZoneRecords, interleaved with signatures
  35  */
  36
  37 class ChunkedSigningPipe
  38 {
  39 public:
  40   typedef vector<DNSZoneRecord> rrset_t;
  41   typedef rrset_t chunk_t; // for now
  42
  43   ChunkedSigningPipe(const ChunkedSigningPipe&) = delete;
  44   void operator=(const ChunkedSigningPipe&) = delete;
  45   ChunkedSigningPipe(const DNSName& signerName, bool mustSign, unsigned int numWorkers=3);
  46   ~ChunkedSigningPipe();
  47   bool submit(const DNSZoneRecord& rr);
  48   chunk_t getChunk(bool final=false);
  49   unsigned int getReady() const;
  50
  51   std::atomic<unsigned long> d_signed;
  52   unsigned int d_queued;
  53   unsigned int d_outstanding;
  54
  55 private:
  56   void flushToSign();
  57   void dedupRRSet();
  58   void sendRRSetToWorker(); // dispatch RRSET to worker
  59   void addSignedToChunks(std::unique_ptr<chunk_t>& signedChunk);
  60   pair<vector<int>, vector<int> > waitForRW(bool rd, bool wr, int seconds);
  61
  62   static void* helperWorker(ChunkedSigningPipe* csp, int fd);
  63   void worker(int fd);
  64
  65   unsigned int d_numworkers;
  66   unsigned int d_submitted;
  67
  68   std::unique_ptr<rrset_t> d_rrsetToSign;
  69   std::deque< std::vector<DNSZoneRecord> > d_chunks;
  70   DNSName d_signer;
  71
  72   chunk_t::size_type d_maxchunkrecords;
  73
  74   std::vector<int> d_sockets;
  75   std::set<int> d_eof;
  76   std::map<int,int> d_outstandings;
  77
  78   vector<std::thread> d_threads;
  79   bool d_mustSign;
  80   bool d_final;
  81 };