net/dns/record_parsed.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef NET_DNS_RECORD_PARSED_H_
   6 #define NET_DNS_RECORD_PARSED_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/time/time.h"
  12 #include "net/base/net_export.h"
  13
  14 namespace net {
  15
  16 class DnsRecordParser;
  17 class RecordRdata;
  18
  19 // Parsed record. This is a form of DnsResourceRecord where the rdata section
  20 // has been parsed into a data structure.
  21 class NET_EXPORT_PRIVATE RecordParsed {
  22  public:
  23   virtual ~RecordParsed();
  24
  25   // All records are inherently immutable. Return a const pointer.
  26   static scoped_ptr<const RecordParsed> CreateFrom(DnsRecordParser* parser,
  27                                                    base::Time time_created);
  28
  29   const std::string& name() const { return name_; }
  30   uint16 type() const { return type_; }
  31   uint16 klass() const { return klass_; }
  32   uint32 ttl() const { return ttl_; }
  33
  34   base::Time time_created() const { return time_created_; }
  35
  36   template <class T> const T* rdata() const {
  37     if (T::kType != type_)
  38       return NULL;
  39     return static_cast<const T*>(rdata_.get());
  40   }
  41
  42   // Check if two records have the same data. Ignores time_created and ttl.
  43   // If |is_mdns| is true, ignore the top bit of the class
  44   // (the cache flush bit).
  45   bool IsEqual(const RecordParsed* other, bool is_mdns) const;
  46
  47  private:
  48   RecordParsed(const std::string& name, uint16 type, uint16 klass,
  49                uint32 ttl, scoped_ptr<const RecordRdata> rdata,
  50                base::Time time_created);
  51
  52   std::string name_;  // in dotted form
  53   const uint16 type_;
  54   const uint16 klass_;
  55   const uint32 ttl_;
  56
  57   const scoped_ptr<const RecordRdata> rdata_;
  58
  59   const base::Time time_created_;
  60 };
  61
  62 }  // namespace net
  63
  64 #endif  // NET_DNS_RECORD_PARSED_H_