The DNS_RECORD structure stores a DNS resource record (RR).

Syntax

typedef struct _DnsRecord {
  DNS_RECORD *pNext;
  PWSTR      pName;
  WORD       wType;
  WORD       wDataLength;
  union {
    DWORD DW;
    DNS_RECORD_FLAGS S;
  } Flags;
  DWORD      dwTtl;
  DWORD      dwReserved;
  union {
    DNS_A_DATA A;
    DNS_SOA_DATA SOA, Soa;
    DNS_PTR_DATA PTR, Ptr, NS, Ns, CNAME, Cname, DNAME, Dname, MB, Mb, MD, Md, MF, Mf, MG, Mg, MR, Mr;
    DNS_MINFO_DATA MINFO, Minfo, RP, Rp;
    DNS_MX_DATA MX, Mx, AFSDB, Afsdb, RT, Rt;
    DNS_TXT_DATA HINFO, Hinfo, ISDN, Isdn, TXT, Txt, X25;
    DNS_NULL_DATA Null;
    DNS_WKS_DATA WKS, Wks;
    DNS_AAAA_DATA AAAA;
    DNS_KEY_DATA KEY, Key;
    DNS_SIG_DATA SIG, Sig;
    DNS_ATMA_DATA ATMA, Atma;
    DNS_NXT_DATA NXT, Nxt;
    DNS_SRV_DATA SRV, Srv;
    DNS_NAPTR_DATA NAPTR, Naptr;
    DNS_OPT_DATA OPT, Opt;
    DNS_DS_DATA  DS, Ds;
    DNS_RRSIG_DATA RRSIG, Rrsig;
    DNS_NSEC_DATA NSEC, Nsec;
    DNS_DNSKEY_DATA DNSKEY, Dnskey;
    DNS_TKEY_DATA TKEY, Tkey;
    DNS_TSIG_DATA TSIG, Tsig;
    DNS_WINS_DATA WINS, Wins;
    DNS_WINSR_DATA   WINSR, WinsR, NBSTAT, Nbstat;
    DNS_DHCID_DATA   DHCID;
  } Data;
}DNS_RECORD, *PDNS_RECORD;

Members

pNext

A pointer to the next DNS_RECORD structure.

pName

A pointer to a string that represents the domain name of the record set. This must be in the string format that corresponds to the function called, such as ANSI, Unicode, or UTF8.

wType

A value that represents the RR DNS Record Type. wType determines the format of Data. For example, if the value of wType is DNS_TYPE_A, the data type of Data is DNS_A_DATA.

wDataLength

The length, in bytes, of Data. For fixed-length data types, this value is the size of the corresponding datatype, such as sizeof(DNS_A_DATA). For the non-fixed data types, use one of the following macros to determine the length of the data:

#include <windows.h>

#define DNS_NULL_RECORD_LENGTH(ByteCount) (sizeof(DWORD) + (ByteCount))
#define DNS_WKS_RECORD_LENGTH(ByteCount) (sizeof(DNS_WKS_DATA) + (ByteCount-1))
#define DNS_WINS_RECORD_LENGTH(IpCount) (sizeof(DNS_WINS_DATA) + ((IpCount-1) * sizeof(IP_ADDRESS)))
#define DNS_TEXT_RECORD_LENGTH(StringCount) (sizeof(DWORD) + ((StringCount) * sizeof(PCHAR)))

Flags

DW

A value that contains a bitmap of DNS Record Flags.

S

A set of flags in the form of a DNS_RECORD_FLAGS structure.

dwTtl

The DNS RR's Time To Live value (TTL), in seconds.

dwReserved

Reserved. Do not use.

Data

The DNS RR datatype is determined by wType and is one of the following members:

A

The RR datatype is DNS_A_DATA. The value of wType is DNS_TYPE_A.

SOA, Soa

The RR datatype is DNS_SOA_DATA. The value of wType is DNS_TYPE_SOA.

PTR, Ptr, NS, Ns, CNAME, Cname, DNAME, Dname, MB, Mb, MD, Md, MF, Mf, MG, Mg, MR, Mr

The RR datatype is DNS_PTR_DATA. The value of wType is DNS_TYPE_PTR.

MINFO, Minfo, RP, Rp

The RR datatype is DNS_MINFO_DATA. The value of wType is DNS_TYPE_MINFO.

MX, Mx, AFSDB, Afsdb, RT, Rt

The RR datatype is DNS_MX_DATA. The value of wType is DNS_TYPE_MX.

HINFO, Hinfo, ISDN, Isdn, TXT, Txt, X25

The RR datatype is DNS_TXT_DATA. The value of wType is DNS_TYPE_TEXT.

Null

The RR datatype is DNS_NULL_DATA. The value of wType is DNS_TYPE_NULL.

WKS, Wks

The RR datatype is DNS_WKS_DATA. The value of wType is DNS_TYPE_WKS.

AAAA

The RR datatype is DNS_AAAA_DATA. The value of wType is DNS_TYPE_AAAA.

KEY, Key

The RR datatype is DNS_KEY_DATA. The value of wType is DNS_TYPE_KEY.

SIG, Sig

The RR datatype is DNS_SIG_DATA. The value of wType is DNS_TYPE_SIG.

ATMA, Atma

The RR datatype is DNS_ATMA_DATA. The value of wType is DNS_TYPE_ATMA.

NXT, Nxt

The RR datatype is DNS_NXT_DATA. The value of wType is DNS_TYPE_NXT.

SRV, Srv

The RR datatype is DNS_SRV_DATA. The value of wType is DNS_TYPE_SRV.

NAPTR, Naptr

The RR datatype is DNS_NAPTR_DATA. The value of wType is DNS_TYPE_NAPTR.

OPT, Opt

Windows 7 or later: The RR datatype is DNS_OPT_DATA. The value of wType is DNS_TYPE_OPT.

DS, Ds

Windows 7 or later: The RR datatype is DNS_DS_DATA. The value of wType is DNS_TYPE_DS.

RRSIG, Rrsig

Windows 7 or later: The RR datatype is DNS_RRSIG_DATA. The value of wType is DNS_TYPE_RRSIG.

NSEC, Nsec

Windows 7 or later: The RR datatype is DNS_NSEC_DATA. The value of wType is DNS_TYPE_NSEC.

DNSKEY, Dnskey

Windows 7 or later: The RR datatype is DNS_DNSKEY_DATA. The value of wType is DNS_TYPE_DNSKEY.

TKEY, Tkey

The RR datatype is DNS_TKEY_DATA. The value of wType is DNS_TYPE_TKEY.

TSIG, Tsig

The RR datatype is DNS_TSIG_DATA. The value of wType is DNS_TYPE_TSIG.

WINS, Wins

The RR datatype is DNS_WINS_DATA. The value of wType is DNS_TYPE_WINS.

WINSR, WinsR, NBSTAT, Nbstat

The RR datatype is DNS_WINSR_DATA. The value of wType is DNS_TYPE_WINSR.

DHCID

Windows 7 or later: The RR datatype is DNS_DHCID_DATA. The value of wType is DNS_TYPE_DHCID.

Remarks

When building a DNS_RECORD list as an input argument for the various DNS update routines found in the DNS API, all flags in the DNS_RECORD structure should be set to zero.

Requirements

See Also

DnsQuery

DnsExtractRecordsFromMessage

DnsModifyRecordsInSet

DnsRecordCompare

DnsRecordCopyEx

DnsRecordSetCompare

DnsRecordSetDetach

DnsReplaceRecordSet

DNS_A_DATA

DNS_AAAA_DATA

DNS_ATMA_DATA

DNS_DHCID_DATA

DNS_DNSKEY_DATA

DNS_DS_DATA

DNS_KEY_DATA

DNS_LOC_DATA

DNS_MINFO_DATA

DNS_MX_DATA

DNS_NAPTR_DATA

DNS_NSEC_DATA

DNS_NULL_DATA

DNS_NXT_DATA

DNS_OPT_DATA

DNS_PTR_DATA

DNS_RRSIG_DATA

DNS_SIG_DATA

DNS_SOA_DATA

DNS_SRV_DATA

DNS_TKEY_DATA

DNS_TSIG_DATA

DNS_TXT_DATA

DNS_WINS_DATA

DNS_WINSR_DATA

DNS_WKS_DATA

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Build date: 5/28/2009