DNS_WKS_DATA structure (windns.h)

Article
11/12/2024

The DNS_WKS_DATA structure represents a DNS well-known services (WKS) record as specified in section 3.4.2 of RFC 1035.

Syntax

typedef struct {
  IP4_ADDRESS IpAddress;
  UCHAR       chProtocol;
  BYTE        BitMask[1];
} DNS_WKS_DATA, *PDNS_WKS_DATA;

Members

IpAddress

An IP4_ADDRESS data type that contains the IPv4 address for this resource record (RR).

chProtocol

A value that represents the IP protocol for this RR as defined in RFC 1010.

Transmission Control Protocol (TCP) (6)

User Datagram Protocol (UDP) (17)

BitMask[1]

A variable-length bitmask whose bits correspond to the port number of well known services offered by the protocol specified in chProtocol. The bitmask has one bit for every port of the supported protocol, but must be a multiple of a BYTE. Bit 0 corresponds to port 1, bit 1 corresponds to port 2, and so forth for a maximum of 1024 bits.

Remarks

The DNS_WKS_DATA structure is used in conjunction with the DNS_RECORD structure to programmatically manage DNS entries.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	windns.h

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