net/dns/record_parsed.cc

   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 #include "net/dns/record_parsed.h"
   6
   7 #include "base/logging.h"
   8 #include "net/dns/dns_response.h"
   9 #include "net/dns/record_rdata.h"
  10
  11 namespace net {
  12
  13 RecordParsed::RecordParsed(const std::string& name, uint16 type, uint16 klass,
  14                            uint32 ttl, scoped_ptr<const RecordRdata> rdata,
  15                            base::Time time_created)
  16     : name_(name), type_(type), klass_(klass), ttl_(ttl), rdata_(rdata.Pass()),
  17       time_created_(time_created) {
  18 }
  19
  20 RecordParsed::~RecordParsed() {
  21 }
  22
  23 // static
  24 scoped_ptr<const RecordParsed> RecordParsed::CreateFrom(
  25     DnsRecordParser* parser,
  26     base::Time time_created) {
  27   DnsResourceRecord record;
  28   scoped_ptr<const RecordRdata> rdata;
  29
  30   if (!parser->ReadRecord(&record))
  31     return scoped_ptr<const RecordParsed>();
  32
  33   switch (record.type) {
  34     case ARecordRdata::kType:
  35       rdata = ARecordRdata::Create(record.rdata, *parser);
  36       break;
  37     case AAAARecordRdata::kType:
  38       rdata = AAAARecordRdata::Create(record.rdata, *parser);
  39       break;
  40     case CnameRecordRdata::kType:
  41       rdata = CnameRecordRdata::Create(record.rdata, *parser);
  42       break;
  43     case PtrRecordRdata::kType:
  44       rdata = PtrRecordRdata::Create(record.rdata, *parser);
  45       break;
  46     case SrvRecordRdata::kType:
  47       rdata = SrvRecordRdata::Create(record.rdata, *parser);
  48       break;
  49     case TxtRecordRdata::kType:
  50       rdata = TxtRecordRdata::Create(record.rdata, *parser);
  51       break;
  52     case NsecRecordRdata::kType:
  53       rdata = NsecRecordRdata::Create(record.rdata, *parser);
  54       break;
  55     default:
  56       DVLOG(1) << "Unknown RData type for received record: " << record.type;
  57       return scoped_ptr<const RecordParsed>();
  58   }
  59
  60   if (!rdata.get())
  61     return scoped_ptr<const RecordParsed>();
  62
  63   return scoped_ptr<const RecordParsed>(new RecordParsed(record.name,
  64                                                          record.type,
  65                                                          record.klass,
  66                                                          record.ttl,
  67                                                          rdata.Pass(),
  68                                                          time_created));
  69 }
  70
  71 bool RecordParsed::IsEqual(const RecordParsed* other, bool is_mdns) const {
  72   DCHECK(other);
  73   uint16 klass = klass_;
  74   uint16 other_klass = other->klass_;
  75
  76   if (is_mdns) {
  77     klass &= dns_protocol::kMDnsClassMask;
  78     other_klass &= dns_protocol::kMDnsClassMask;
  79   }
  80
  81   return name_ == other->name_ &&
  82       klass == other_klass &&
  83       type_ == other->type_ &&
  84       rdata_->IsEqual(other->rdata_.get());
  85 }
  86 }