2.2.2.2.5 DNS_RPC_RECORD

Article
08/11/2021

The DNS_RPC_RECORD structure is used to specify a single DNS record's parameters and data. This structure is returned by the DNS server in response to an R_DnssrvEnumRecords2 (section 3.1.4.9) method call.

 typedef struct _DnssrvRpcRecord {
   WORD wDataLength;
   WORD wType;
   DWORD dwFlags;
   DWORD dwSerial;
   DWORD dwTtlSeconds;
   DWORD dwTimeStamp;
   DWORD dwReserved;
   [size_is(wDataLength)] BYTE Buffer[];
 } DNS_RPC_RECORD,
  *PDNS_RPC_RECORD,
  DNS_FLAT_RECORD,
  *PDNS_FLAT_RECORD;

wDataLength: The total size of the variable buffer, in bytes. Note that the DNS_RPC_RECORD structure is always 4-byte aligned, which means there can be 0-3 bytes of padding at the end of the structure. The pad bytes are not included in the wDataLength count.

wType: The type of the resource record, as specified in section 2.2.2.1.1 DNS_RECORD_TYPE.

dwFlags: Resource record properties. This field can contain one of the RANK* flags in the low-order bits and one of the DNS_RPC_FLAGS* in the high-order bits.

Value	Meaning
RANK_CACHE_BIT 0x00000001	The record came from the cache.
RANK_ROOT_HINT 0x00000008	The record is a preconfigured root hint.
RANK_OUTSIDE_GLUE 0x00000020	This value is not used.
RANK_CACHE_NA_ADDITIONAL 0x00000031	The record was cached from the additional section of a non-authoritative response.
RANK_CACHE_NA_AUTHORITY 0x00000041	The record was cached from the authority section of a non-authoritative response.
RANK_CACHE_A_ADDITIONAL 0x00000051	The record was cached from the additional section of an authoritative response.
RANK_CACHE_NA_ANSWER 0x00000061	The record was cached from the answer section of a non-authoritative response.
RANK_CACHE_A_AUTHORITY 0x00000071	The record was cached from the authority section of an authoritative response.
RANK_GLUE 0x00000080	The record is a glue record in an authoritative zone.
RANK_NS_GLUE 0x00000082	The record is a delegation (type NS) record in an authoritative zone.
RANK_CACHE_A_ANSWER 0x000000C1	The record was cached from the answer section of an authoritative response.
RANK_ZONE 0x000000F0	The record comes from an authoritative zone.
DNS_RPC_FLAG_ZONE_ROOT 0x40000000	The record is at the root of a zone (not necessarily a zone hosted by this server; the record could have come from the cache).
DNS_RPC_FLAG_AUTH_ZONE_ROOT 0x20000000	The record is at the root of a zone that is locally hosted on this server.
DNS_RPC_FLAG_CACHE_DATA 0x80000000	The record came from the cache.
DNS_RPC_FLAG_RECORD_WIRE_FORMAT 0x00100000	The record SHOULD <25> be treated as a resource record of unknown type ([RFC3597] section 2) by the DNS server.

dwSerial: This MUST be set to 0x00000000 when sent by the client or server, and ignored on receipt by the server or client.

dwTtlSeconds: The duration, in seconds, after which this record will expire.

dwTimeStamp: The time stamp, in hours, for the record when it received the last update.

dwReserved: This value MUST be set to 0x00000000 when sent by the client and ignored on receipt by the server.

Buffer: Record data in DNS_RPC_RECORD_DATA (section 2.2.2.2.4) format where type is specified by the value wType.<26>

Value	Meaning
DNS_TYPE_ZERO 0x0000	DNS_RPC_RECORD_TS
DNS_TYPE_A 0x0001	DNS_RPC_RECORD_A
DNS_TYPE_NS 0x0002	DNS_RPC_RECORD_NODE_NAME
DNS_TYPE_MD 0x0003	DNS_RPC_RECORD_NODE_NAME
DNS_TYPE_MF 0x0004	DNS_RPC_RECORD_NODE_NAME
DNS_TYPE_CNAME 0x0005	DNS_RPC_RECORD_NODE_NAME
DNS_TYPE_SOA 0x0006	DNS_RPC_RECORD_SOA
DNS_TYPE_MB 0x0007	DNS_RPC_RECORD_NODE_NAME
DNS_TYPE_MG 0x0008	DNS_RPC_RECORD_NODE_NAME
DNS_TYPE_MR 0x0009	DNS_RPC_RECORD_NODE_NAME
DNS_TYPE_NULL 0x000A	DNS_RPC_RECORD_NULL
DNS_TYPE_WKS 0x000B	DNS_RPC_RECORD_WKS
DNS_TYPE_PTR 0x000C	DNS_RPC_RECORD_NODE_NAME
DNS_TYPE_HINFO 0x000D	DNS_RPC_RECORD_STRING
DNS_TYPE_MINFO 0x000E	DNS_RPC_RECORD_MAIL_ERROR
DNS_TYPE_MX 0x000F	DNS_RPC_RECORD_NAME_PREFERENCE
DNS_TYPE_TXT 0x0010	DNS_RPC_RECORD_STRING
DNS_TYPE_RP 0x0011	DNS_RPC_RECORD_MAIL_ERROR
DNS_TYPE_AFSDB 0x0012	DNS_RPC_RECORD_NAME_PREFERENCE
DNS_TYPE_X25 0x0013	DNS_RPC_RECORD_STRING
DNS_TYPE_ISDN 0x0014	DNS_RPC_RECORD_STRING
DNS_TYPE_RT 0x0015	DNS_RPC_RECORD_NAME_PREFERENCE
DNS_TYPE_SIG 0x0018	DNS_RPC_RECORD_SIG
DNS_TYPE_KEY 0x0019	DNS_RPC_RECORD_KEY
DNS_TYPE_AAAA 0x001C	DNS_RPC_RECORD_AAAA
DNS_TYPE_NXT 0x001E	DNS_RPC_RECORD_NXT
DNS_TYPE_SRV 0x0021	DNS_RPC_RECORD_SRV
DNS_TYPE_ATMA 0x0022	DNS_RPC_RECORD_ATMA
DNS_TYPE_NAPTR 0x0023	DNS_RPC_RECORD_NAPTR
DNS_TYPE_DNAME 0x0027	DNS_RPC_RECORD_NODE_NAME
DNS_TYPE_DS 0x002B	DNS_RPC_RECORD_DS
DNS_TYPE_RRSIG 0x002E	DNS_RPC_RECORD_RRSIG
DNS_TYPE_NSEC 0x002F	DNS_RPC_RECORD_NSEC
DNS_TYPE_DNSKEY 0x0030	DNS_RPC_RECORD_DNSKEY
DNS_TYPE_DHCID 0x0031	DNS_RPC_RECORD_DHCID
DNS_TYPE_NSEC3 0x0032	DNS_RPC_RECORD_NSEC3
DNS_TYPE_NSEC3PARAM 0x0033	DNS_RPC_RECORD_NSEC3PARAM
DNS_TYPE_TLSA 0x0034	DNS_RPC_RECORD_TLSA
DNS_TYPE_WINS 0xFF01	DNS_RPC_RECORD_WINS
DNS_TYPE_WINSR 0xFF02	DNS_RPC_RECORD_WINSR

Other type values that are not explicitly defined in the preceding table MUST be enumerable, including values defined by [IANA-DNS], and they MUST use the DNS_RPC_RECORD_NULL (section 2.2.2.2.4.4) structure. If the dwFlags field is set to DNS_RPC_FLAG_RECORD_WIRE_FORMAT, the DNS_RPC_RECORD_UNKNOWN (section 2.2.2.2.4.27) structure MUST be used for all resource record types.

2.2.2.2.5 DNS_RPC_RECORD

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