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
14namespace net {
15
16class DnsRecordParser;
17class RecordRdata;
18
19// Parsed record. This is a form of DnsResourceRecord where the rdata section
20// has been parsed into a data structure.
21class 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_
65