Cache for mDNS records

net/dns/record_parsed_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/dns/record_parsed.h"
 
 #include "net/dns/dns_protocol.h"
 #include "net/dns/dns_response.h"
 #include "net/dns/dns_test_util.h"
 #include "net/dns/record_rdata.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 
+static const char kT1ResponseWithCacheFlushBit[] = {
+  0x0a, 'c', 'o', 'd', 'e', 'r', 'e', 'v', 'i', 'e', 'w',
+  0x08, 'c', 'h', 'r', 'o', 'm', 'i', 'u', 'm',
+  0x03, 'o', 'r', 'g',
+  0x00,
+  0x00, 0x05,        // TYPE is CNAME.
+  0x80, 0x01,        // CLASS is IN with cache flush bit set.
+  0x00, 0x01,        // TTL (4 bytes) is 20 hours, 47 minutes, 48 seconds.
+  0x24, 0x74,
+  0x00, 0x12,        // RDLENGTH is 18 bytes.
+  // ghs.l.google.com in DNS format.
+  0x03, 'g', 'h', 's',
+  0x01, 'l',
+  0x06, 'g', 'o', 'o', 'g', 'l', 'e',
+  0x03, 'c', 'o', 'm',
+  0x00
+};
+
 TEST(RecordParsedTest, ParseSingleRecord) {
   DnsRecordParser parser(kT1ResponseDatagram, sizeof(kT1ResponseDatagram),
                          sizeof(dns_protocol::Header));
   scoped_ptr<const RecordParsed> record;
   const CnameRecordRdata* rdata;
 
   parser.SkipQuestion();
-  record = RecordParsed::CreateFrom(&parser);
+  record = RecordParsed::CreateFrom(&parser, base::Time());
   EXPECT_TRUE(record != NULL);
 
   ASSERT_EQ("codereview.chromium.org", record->name());
   ASSERT_EQ(dns_protocol::kTypeCNAME, record->type());
   ASSERT_EQ(dns_protocol::kClassIN, record->klass());
 
   rdata = record->rdata<CnameRecordRdata>();
   ASSERT_TRUE(rdata != NULL);
   ASSERT_EQ(kT1CanonName, rdata->cname());
 
   ASSERT_FALSE(record->rdata<SrvRecordRdata>());
+  ASSERT_TRUE(record->IsEqual(record.get(), true));
 }
+
+TEST(RecordParsedTest, CacheFlushBitCompare) {
+  DnsRecordParser parser1(kT1ResponseDatagram, sizeof(kT1ResponseDatagram),
+                         sizeof(dns_protocol::Header));
+  parser1.SkipQuestion();
+  scoped_ptr<const RecordParsed> record1 =
+      RecordParsed::CreateFrom(&parser1, base::Time());
+
+  DnsRecordParser parser2(kT1ResponseWithCacheFlushBit,
+                          sizeof(kT1ResponseWithCacheFlushBit),
+                          0);
+
+  scoped_ptr<const RecordParsed> record2 =
+      RecordParsed::CreateFrom(&parser2, base::Time());
+
+  EXPECT_FALSE(record1->IsEqual(record2.get(), false));
+  EXPECT_TRUE(record1->IsEqual(record2.get(), true));
+  EXPECT_FALSE(record2->IsEqual(record1.get(), false));
+  EXPECT_TRUE(record2->IsEqual(record1.get(), true));
 }
+
+}  //namespace net