public DnsResourceRecord GetRecord(BaseResourceRecordInfo info, ArraySegment <byte> data)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
int oldIndex = _reader.Index;
DnsResourceRecord result;
switch (info.RecordType)
{
case ResourceRecordType.A:
IPAddress ipaddress = _reader.ReadIPAddress(data);
result = new ARecord(info, ipaddress);
break;
default:
// update reader index because we don't read full data for the empty record
_reader.Advance(info.RawDataLength);
result = new EmptyRecord(info);
break;
}
// sanity check
if (_reader.Index != oldIndex + info.RawDataLength)
{
throw new InvalidOperationException("Record reader index out of sync.");
}
return(result);
}
public async Task Cache_EntriesLowestTT_Expires()
{
var cache = new ResponseCache();
var record = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 1000, 100));
var recordB = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 100, 100));
var recordC = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 1, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0)
{
Audit = new LookupClientAudit()
};
response.AddAnswer(record);
response.AddAdditional(recordB);
response.AddAuthority(recordC);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
await Task.Delay(200);
var item = cache.Get("key", out var effectiveTtl);
Assert.NotNull(item);
Assert.Equal(1 * 1000, effectiveTtl);
await Task.Delay(1100);
var item3 = cache.Get("key", out _);
Assert.Null(item3);
}
private EmptyRecord WrapEmptyRecordItem(DataRow emptyRecordRow)
{
EmptyRecord emptyRecordItem = new EmptyRecord();
if (emptyRecordRow != null)
{
emptyRecordItem.ID = Convert.ToInt32(emptyRecordRow["ID"]);
if (Convert.ToInt32(emptyRecordRow["CowGroupID"]) != 0)
{
emptyRecordItem.CowGroupID = Convert.ToInt32(emptyRecordRow["CowGroupID"]);
}
if (Convert.ToInt32(emptyRecordRow["FormulaID"]) != 0)
{
emptyRecordItem.FormulaID = Convert.ToInt32(emptyRecordRow["FormulaID"]);
}
if (Convert.ToInt32(emptyRecordRow["RecordUserID"]) != 0)
{
emptyRecordItem.RecordUserID = Convert.ToInt32(emptyRecordRow["RecordUserID"]);
}
emptyRecordItem.RecordTime = Convert.ToDateTime(emptyRecordRow["RecordTime"]);
if (Convert.ToInt32(emptyRecordRow["EmptyHour"]) != 0)
{
emptyRecordItem.EmptyHour = float.Parse(emptyRecordRow["EmptyHour"].ToString());
}
emptyRecordItem.Name = emptyRecordRow["Name"].ToString();
}
return(emptyRecordItem);
}
public async Task Cache_EntriesLowestTT_Expires()
{
var cache = new ResponseCache(true);
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 1000, 100));
var recordB = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 100, 100));
var recordC = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 1, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
response.AddAdditional(recordB);
response.AddAuthority(recordC);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any), null));
await Task.Delay(200);
var item = cache.Get("key", out double?effectiveTtl);
Assert.NotNull(item);
Assert.Equal(1 * 1000, effectiveTtl);
await Task.Delay(1100);
var item3 = cache.Get("key", out double?effectiveTtl2);
Assert.Null(item3);
}
public void GetRecord_should_return_EmptyRecord_type_when_unknown_recordType_is_found()
{
// Arrange.
const string query = "www.msn.com";
const string queryRoot = query + ".";
const ResourceRecordType recordType = ResourceRecordType.OPT; // possibly make it to default case in the switch statement.
const QueryClass queryClass = QueryClass.IN; // IN
const int timeToLive = 1000;
const int rawDataLen = 10;
IPAddress ipaddress = IPAddress.Parse("10.1.1.100");
IDnsString dnsString = new DnsString(query, queryRoot);
BaseResourceRecordInfo info = new BaseResourceRecordInfo(recordType, queryClass, timeToLive, rawDataLen, dnsString);
ArraySegment <byte> responseData = GetSampleData(ResponseDataSampleFile.QuestionAndAnswerQuery);
mockReader.SetupSequence(r => r.Index).Returns(100).Returns(100 + rawDataLen);
mockReader.Setup(r => r.ReadIPAddress(responseData)).Returns(ipaddress);
IDnsRecordFactory factory = new DnsRecordFactory(mockReader.Object);
// Act.
DnsResourceRecord result = factory.GetRecord(info, responseData);
// Assert.
Assert.IsInstanceOf(typeof(EmptyRecord), result);
EmptyRecord record = (EmptyRecord)result;
}
/*
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| |
| / /
| / NAME /
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| TYPE |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| CLASS |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| TTL |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| RDLENGTH |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--|
| / RDATA /
| / /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* */
public DnsResourceRecord GetRecord(
ResourceRecord info,
DnsDatagramReader reader)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
var oldIndex = reader.Index;
DnsResourceRecord result;
if (_recordReaders.TryGetValue(info.RecordType.Value, out var recordReader))
{
result = recordReader.ReadResourceRecord(info, reader);
}
else
{
// update reader index because we don't read full data for the empty record
reader.Index += info.RawDataLength;
result = new EmptyRecord(info);
}
// sanity check
if (reader.Index != oldIndex + info.RawDataLength)
{
throw new InvalidOperationException("Record reader index out of sync.");
}
return(result);
}
public List <EmptyRecord> GetEmptyRecordList()
{
List <EmptyRecord> lstEmptyRecord = new List <EmptyRecord>();
DataTable datEmptyRecord = this.dalEmptyRecord.GetEmptyRecordList();
foreach (DataRow drEmptyRecord in datEmptyRecord.Rows)
{
EmptyRecord emptyRecordItem = WrapEmptyRecordItem(drEmptyRecord);
lstEmptyRecord.Add(emptyRecordItem);
}
return(lstEmptyRecord);
}
//插入空槽记录信息
public int InsertEmptyRecordInfo(EmptyRecord emptyRecord)
{
StringBuilder sql = new StringBuilder();
sql.Append(@"insert into [Feed_EmptyRecord] values (
" + emptyRecord.CowGroupID + ","
+ emptyRecord.FormulaID + ","
+ emptyRecord.RecordUserID + ",'"
+ emptyRecord.RecordTime + "',"
+ emptyRecord.EmptyHour + ")");
return(dataProvider1mutong.ExecuteNonQuery(sql.ToString(), CommandType.Text));
}
public void Cache_GetOrAdd()
{
var cache = new ResponseCache(true);
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 100, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key");
Assert.Equal(item, response.AsQueryResponse(new NameServer(IPAddress.Any)));
}
public void Cache_DoesCacheWithMinimumDefined()
{
var cache = new ResponseCache(true, TimeSpan.FromMilliseconds(100));
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 0, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key");
// should not be null although TTL is zero, mimimum timeout is set to 100ms
Assert.Equal(item, response.AsQueryResponse(new NameServer(IPAddress.Any)));
}
public void Cache_DoesNotCacheIfDisabled()
{
var cache = new ResponseCache(false);
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 100, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key");
// should be null because cache is disabled and we create null in the second call of GetOrAdd
Assert.Null(item);
}
public void Cache_DoesNotCacheIfZeroTTL()
{
var cache = new ResponseCache(true);
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 0, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key");
// should be null because ttl of the record is 0 which disables caching for this record
Assert.Null(item);
}
public void Cache_SupportsInfinite()
{
var cache = new ResponseCache(true, Timeout.InfiniteTimeSpan);
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 0, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any), null));
var item = cache.Get("key", out double?effectiveTtl);
// should not be null although TTL is zero, minimum timeout is set to infinite
Assert.Equal(item, response.AsQueryResponse(new NameServer(IPAddress.Any), null));
Assert.Equal(int.MaxValue, effectiveTtl);
}
public void Cache_DoesCacheWithMinimumDefined()
{
var minTtl = 2000;
var cache = new ResponseCache(true, TimeSpan.FromMilliseconds(minTtl));
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 0, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any), null));
var item = cache.Get("key", out double?effectiveTtl);
Assert.NotNull(item);
Assert.Equal(0, item.Answers.First().TimeToLive);
Assert.Equal(minTtl, effectiveTtl);
}
public void Cache_GetOrAdd()
{
var cache = new ResponseCache(true);
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 100, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0)
{
Audit = new LookupClientAudit()
};
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key", out double?effectiveTtl);
Assert.Equal(item, response.AsQueryResponse(new NameServer(IPAddress.Any)));
Assert.Equal(100 * 1000, effectiveTtl);
}
public void Cache_GetOrAddExists()
{
var cache = new ResponseCache(true);
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 100, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
var success = cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
Assert.True(success);
response.AddAnswer(new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 100, 100)));
var fail = cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
Assert.False(fail);
}
public void Cache_RespectsMaximumTtl()
{
var maxTtl = 2000;
var cache = new ResponseCache(true, maximumTimeout: TimeSpan.FromMilliseconds(maxTtl));
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 60 * 60 * 24, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any), null));
var item = cache.Get("key", out double?effectiveTtl);
Assert.NotNull(item);
Assert.Equal(1, cache.Count);
Assert.Equal(60 * 60 * 24, item.Answers.First().TimeToLive);
Assert.Equal(maxTtl, effectiveTtl);
}
public void Cache_DoesNotCacheIfZeroTTL()
{
var cache = new ResponseCache();
var record = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 0, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0)
{
Audit = new LookupClientAudit()
};
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key", out var effectiveTtl);
// should be null because ttl of the record is 0 which disables caching for this record
Assert.Null(item);
Assert.Null(effectiveTtl);
}
public void Cache_SupportsInfinite()
{
var cache = new ResponseCache(true, Timeout.InfiniteTimeSpan);
var record = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 0, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0)
{
Audit = new LookupClientAudit()
};
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key", out var effectiveTtl);
// should not be null although TTL is zero, mimimum timeout is set to infinite
Assert.Equal(item, response.AsQueryResponse(new NameServer(IPAddress.Any)));
Assert.Equal(int.MaxValue, effectiveTtl);
}
public void Cache_EntriesLowestTTLWins()
{
var cache = new ResponseCache(true);
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 1000, 100));
var recordB = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 100, 100));
var recordC = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 0, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0);
response.AddAnswer(record);
response.AddAdditional(recordB);
response.AddAuthority(recordC);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key");
// should be null because recordC has zero TTL which wins
Assert.Null(item);
}
public void Cache_DoesNotCacheIfZeroTTLWithZeroMinTtl()
{
var cache = new ResponseCache(true, TimeSpan.Zero);
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 0, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0)
{
Audit = new LookupClientAudit()
};
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key", out double?effectiveTtl);
// should be null because ttl of the record is 0 which disables caching for this record
Assert.Null(item);
Assert.Null(effectiveTtl);
}
public void Cache_DoesNotCacheIfDisabled()
{
var cache = new ResponseCache(false);
var record = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 100, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0)
{
Audit = new LookupClientAudit()
};
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key", out var effectiveTtl);
// should be null because cache is disabled and we create null in the second call of GetOrAdd
Assert.Null(item);
Assert.Null(effectiveTtl);
}
public void Cache_GetOrAddExists()
{
var cache = new ResponseCache();
var record = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 100, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0)
{
Audit = new LookupClientAudit()
};
response.AddAnswer(record);
var success = cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
Assert.True(success);
response.AddAnswer(new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 100, 100)));
var fail = cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
Assert.False(fail);
}
public ActionResult Save()
{
try
{
string cowGroupID = Request.Form["cowGroupName"];
string emptyHour = Request.Form["emHour"];
EmptyRecord emptyRecord = new EmptyRecord();
emptyRecord.CowGroupID = Convert.ToInt32(cowGroupID);
emptyRecord.FormulaID = bllCowGroup.GetFormulaIDByGroupID(Convert.ToInt32(cowGroupID));//需要根据牛群ID获得配方ID
emptyRecord.RecordUserID = UserBLL.Instance.CurrentUser.ID;
emptyRecord.RecordTime = DateTime.Now;
emptyRecord.EmptyHour = Convert.ToInt32(emptyHour);
bllEmptyRecord.InsertEmptyRecordInfo(emptyRecord);
}
catch (Exception e)
{
}
return(RedirectToAction("../../Feed/CowGroup/List"));
}
public void Cache_EntriesLowestTTLWins()
{
var cache = new ResponseCache();
var record = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 1000, 100));
var recordB = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 100, 100));
var recordC = new EmptyRecord(new ResourceRecord(DnsString.Parse("a"), ARecord.ResourceRecordType, QueryClass.In, 0, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0)
{
Audit = new LookupClientAudit()
};
response.AddAnswer(record);
response.AddAdditional(recordB);
response.AddAuthority(recordC);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
var item = cache.Get("key", out var effectiveTtl);
// should be null because recordC has zero TTL which wins
Assert.Null(item);
Assert.Null(effectiveTtl);
}
public async Task Cache_DoesCacheWithMinimumDefined()
{
var minTtl = 2000;
var cache = new ResponseCache(true, TimeSpan.FromMilliseconds(minTtl));
var record = new EmptyRecord(new ResourceRecordInfo("a", ResourceRecordType.A, QueryClass.IN, 1, 100));
var response = new DnsResponseMessage(new DnsResponseHeader(1, 256, 1, 1, 0, 0), 0)
{
Audit = new LookupClientAudit()
};
response.AddAnswer(record);
cache.Add("key", response.AsQueryResponse(new NameServer(IPAddress.Any)));
await Task.Delay(1200);
var item = cache.Get("key", out double?effectiveTtl);
// should not be null although TTL is zero, mimimum timeout is set to 2000ms
// TTL of the record should be zero because the initial TTL is 100
Assert.Equal(0, item.Answers.First().TimeToLive);
Assert.Equal(minTtl, effectiveTtl);
}
public DnsResourceRecord GetRecord(ResourceRecordInfo info)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
var oldIndex = _reader.Index;
DnsResourceRecord result;
switch (info.RecordType)
{
case ResourceRecordType.A:
result = new ARecord(info, _reader.ReadIPAddress());
break;
case ResourceRecordType.NS:
result = new NsRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.CNAME:
result = new CNameRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.SOA:
result = ResolveSoaRecord(info);
break;
case ResourceRecordType.MB:
result = new MbRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.MG:
result = new MgRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.MR:
result = new MrRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.NULL:
result = new NullRecord(info, _reader.ReadBytes(info.RawDataLength).ToArray());
break;
case ResourceRecordType.WKS:
result = ResolveWksRecord(info);
break;
case ResourceRecordType.PTR:
result = new PtrRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.HINFO:
result = new HInfoRecord(info, _reader.ReadString(), _reader.ReadString());
break;
case ResourceRecordType.MINFO:
result = new MInfoRecord(info, _reader.ReadDnsName(), _reader.ReadDnsName());
break;
case ResourceRecordType.MX:
result = ResolveMXRecord(info);
break;
case ResourceRecordType.TXT:
result = ResolveTXTRecord(info);
break;
case ResourceRecordType.RP:
result = new RpRecord(info, _reader.ReadDnsName(), _reader.ReadDnsName());
break;
case ResourceRecordType.AFSDB:
result = new AfsDbRecord(info, (AfsType)_reader.ReadUInt16NetworkOrder(), _reader.ReadDnsName());
break;
case ResourceRecordType.AAAA:
result = new AaaaRecord(info, _reader.ReadIPv6Address());
break;
case ResourceRecordType.SRV:
result = ResolveSrvRecord(info);
break;
case ResourceRecordType.OPT:
result = ResolveOptRecord(info);
break;
case ResourceRecordType.URI:
result = ResolveUriRecord(info);
break;
case ResourceRecordType.CAA:
result = ResolveCaaRecord(info);
break;
default:
// update reader index because we don't read full data for the empty record
_reader.Index += info.RawDataLength;
result = new EmptyRecord(info);
break;
}
// sanity check
if (_reader.Index != oldIndex + info.RawDataLength)
{
throw new InvalidOperationException("Record reader index out of sync.");
}
return(result);
}
public virtual T Visit(EmptyRecord record)
{
return(default(T));
}
public int InsertEmptyRecordInfo(EmptyRecord emptyRecord)
{
return(dalEmptyRecord.InsertEmptyRecordInfo(emptyRecord));
}
