DNS_HEADER

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Windows Embedded CE 6.0 R3

4/8/2010

This structure contains DNS header information used when sending DNS messages.

Syntax

typedef struct _DNS_HEADER {
  WORD Xid;
  BYTE RecursionDesired;
  BYTE Truncation;
  BYTE Authoritative;
  BYTE Opcode;
  BYTE IsResponse;
  BYTE ResponseCode;
  BYTE Reserved;
  BYTE RecursionAvailable;
  WORD QuestionCount;
  WORD AnswerCount;
  WORD NameServerCount;
  WORD AdditionalCount;
} DNS_HEADER, *PDNS_HEADER;

Members

• Xid
  [in] DNS message header identifier.

• RecursionDesired
  [in] Specifies whether recursion is desired on the DNS message.

• Truncation
  [in] Specifies whether truncation has been applied to the DNS message.

• Authoritative
  [in] Specifies whether the node from which the DNS Message is being sent is authoritative for the zone.

• Opcode
  [in] Specifies the operation code to be taken on the DNS message.

• IsResponse
  [in] Specifies whether the DNS message is a query response message.

• ResponseCode
  [in] Response code of the DNS message.

• Reserved
  [in] Reserved. Do not use.

• RecursionAvailable
  [in] Specifies whether recursion is available on the DNS query.

• QuestionCount
  [in] Number of queries contained in the DNS message.

• AnswerCount
  [in] Number of answers contained in the DNS message.

• NameServerCount
  [in] Number of DNS Name Servers the message has traversed in its search for resolution.

• AdditionalCount
  [in] Reserved. Do not use.

Remarks

None.

Requirements

See Also

Reference

DNS Structures