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      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 }
     87