Class DnsHeader

Represents a DNS header, the first entry in a DnsMessage. See DnsQueryFactory for methods to create DNS headers for specific purposes.

Inheritance
Object
DnsHeader
Namespace: Ae.Dns.Protocol
Assembly: Ae.Dns.Protocol.dll
Syntax
public sealed class DnsHeader : IEquatable<DnsHeader>, IDnsByteArrayReader, IDnsByteArrayWriter

Properties

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AdditionalRecordCount

The number of additional records in this header.

Declaration
public short AdditionalRecordCount { get; set; }
Property Value
Type Description
Int16

A count of the number of additional records in this header.
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AnswerRecordCount

The number of DnsMessage records in this header.

Declaration
public short AnswerRecordCount { get; set; }
Property Value
Type Description
Int16

A count of the number of answers contained within this DNS message.
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AuthoritativeAnswer

Determines whether the answer was from an authoritative DNS server.

Declaration
public bool AuthoritativeAnswer { get; set; }
Property Value
Type Description
Boolean

If true, this DNS answer is authoritative.
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Host

The DNS host to use, for example "example.com".

Declaration
public string Host { get; set; }
Property Value
Type Description
String
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Id

Gets or sets the unique ID of this DNS query.

Declaration
public ushort Id { get; set; }
Property Value
Type Description
UInt16

A unique ID which allows the sender/receiver to identify this DNS message (for example if the transport protocol is stateless).
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IsQueryResponse

Determines whether this is a DNS query or answer.

Declaration
public bool IsQueryResponse { get; set; }
Property Value
Type Description
Boolean

For DNS queries this is false, for DNS responses this is true.
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NameServerRecordCount

The number of name server records in this header.

Declaration
public short NameServerRecordCount { get; set; }
Property Value
Type Description
Int16

A count of the number of DNS name server records in this header.
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OperationCode

Determines the operation code for this DNS header.

Declaration
public DnsOperationCode OperationCode { get; set; }
Property Value
Type Description
DnsOperationCode

The DNS operation code for this DNS answer. For example QUERY.
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QueryClass

The DnsQueryClass of this header, normally IN (Internet).

Declaration
public DnsQueryClass QueryClass { get; set; }
Property Value
Type Description
DnsQueryClass

The class of query, most likely IN to represent Internet DNS queries.
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QueryType

The DnsQueryType of this header.

Declaration
public DnsQueryType QueryType { get; set; }
Property Value
Type Description
DnsQueryType

If the type of query is A, it means the query is for IP address records.
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QuestionCount

The number of questions in this header.

Declaration
public short QuestionCount { get; set; }
Property Value
Type Description
Int16

A count of the number of questions asked of the DNS server.
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RecursionAvailable

Indicates whether recursion is available.

Declaration
public bool RecursionAvailable { get; set; }
Property Value
Type Description
Boolean
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RecursionDesired

Indicates whether recursion is desired on this DNS query. If this is an answer, indicates whether the original query requested recursion.

Declaration
public bool RecursionDesired { get; set; }
Property Value
Type Description
Boolean
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ResponseCode

The DnsResponseCode for this result.

Declaration
public DnsResponseCode ResponseCode { get; set; }
Property Value
Type Description
DnsResponseCode
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Tags

A generic bag of tags associated with this object. Will not be serialised and/or passed over the wire.

Declaration
public IDictionary<string, object> Tags { get; }
Property Value
Type Description
IDictionary<String, Object>
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Truncation

Determines whether this DNS answer was truncated due to size.

Declaration
public bool Truncation { get; set; }
Property Value
Type Description
Boolean

Methods

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Equals(DnsHeader)

Declaration
public bool Equals(DnsHeader other)
Parameters
Type Name Description
DnsHeader other
Returns
Type Description
Boolean
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GetHashCode()

Declaration
public override int GetHashCode()
Returns
Type Description
Int32
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ReadBytes(ReadOnlyMemory<Byte>, ref Int32)

Read from the specified byte array, starting at the specified offset.

Declaration
public void ReadBytes(ReadOnlyMemory<byte> bytes, ref int offset)
Parameters
Type Name Description
ReadOnlyMemory<Byte> bytes

The byte array to read from.
Int32 offset

The offset to start at.
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ToString()

Declaration
public override string ToString()
Returns
Type Description
String
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WriteBytes(Memory<Byte>, ref Int32)

Write to the the specified byte array.

Declaration
public void WriteBytes(Memory<byte> bytes, ref int offset)
Parameters
Type Name Description
Memory<Byte> bytes

The byte array to read from.
Int32 offset

The offset to start at.

Implements