DNS_RECORD

Article
11/18/2015

A version of this page is also available for

4/8/2010

This DNS_RECORD structure stores DNS records.

Syntax

typedef struct _DnsRecord {
  struct _DnsRecord* pNext;
  LPTSTR 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, 
      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_TKEY_DATA TKEY, Tkey;
      DNS_TSIG_DATA TSIG, Tsig;
      DNS_WINS_DATA WINS, Wins;
      DNS_WINSR_DATA   WINSR, WinsR, NBSTAT, Nbstat;
    } Data;
} DNS_RECORD, *PDNS_RECORD;

Members

pNext
[in] Pointer to the next DNS_RECORD structure.

pName
[in] Domain name of the record set to be updated. Must be in the string format that corresponds to the function being called, such as ANSI, UNICODE, or UTF8.

wType
[in] DNS record type, in host byte order. Can be any of the following:

DNS_TYPE_A

DNS_TYPE_NS

DNS_TYPE_MD

DNS_TYPE_MF

DNS_TYPE_CNAME

DNS_TYPE_SOA

DNS_TYPE_MB

DNS_TYPE_MG

DNS_TYPE_MR

DNS_TYPE_NULL

DNS_TYPE_WKS

DNS_TYPE_PTR

DNS_TYPE_HINFO

DNS_TYPE_MINFO

DNS_TYPE_MX

DNS_TYPE_TEXT

wDataLength
[in] Length of the data, in bytes. Fixed length data types, this value is the size of the corresponding data type, such as sizeof(DNS_A_DATA). For data types that are not fixed, use one of the following macros to determine the size of the data:

#define DNS_TEXT_RECORD_LENGTH(StringCount) \
            (sizeof(DWORD) + ((StringCount) * sizeof(PCHAR)))

#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)))

Flags

DW
[in] Flags used in the structure, in the form of a bit-wise DWORD.

S
[in] Flags used in the structure, in the form of a DNS_RECORD_FLAGS structure.

dwTtl
[in] Time to live, in seconds. A TTL of zero (0) indicates that the time to live is 10 minutes.

dwReserved
[in] Reserved for future use.

Data
[in] DNS Resource Record data.

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 this structure should be set to zero.

Requirements

Header	windns.h
Windows Embedded CE	Windows CE 5.0 and later
Windows Mobile	Windows Mobile Version 5.0 and later

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DNS_RECORD

Syntax

Members

Flags

Remarks

Requirements

See Also

Reference

Additional resources