DnsRR Class Reference

resource record More...

List of all members.

Public Member Functions
	DnsRR ()
	constructor
	DnsRR (domainname NAME, u_int16 TYPE, u_int16 CLASS, u_int32 TTL)
	constructor taking some fields
	DnsRR (domainname NAME, u_int16 TYPE, u_int16 CLASS, u_int32 TTL, uint16_t RDLENGTH, const char *RDATA)
	constructor taking some fields
	DnsRR (const DnsRR &rr)
	copy constructor
DnsRR &	operator= (const DnsRR &rr)
	assignment operator
	~DnsRR ()
	destructor
Public Attributes
domainname	NAME
	domain name
u_int16	TYPE
	RR type.
u_int16	CLASS
	class
u_int32	TTL
	time to live
u_int16	RDLENGTH
	length of RR data
char *	RDATA
	RR data.

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Detailed Description

resource record

This class represents a resource record (RR), the fundamental building block of the DNS. A RR contains type-dependent information in its RDATA field, as well as some general information on the RR itself, such as its TTL.

Definition at line 199 of file dnsmessage.h.

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Constructor & Destructor Documentation

DnsRR::DnsRR (   )

constructor This is the default constructor.

DnsRR::DnsRR (  domainname  NAME, u_int16  TYPE, u_int16  CLASS, u_int32  TTL )

constructor taking some fields This constructor sets the values of many of the class members, but not for the RR data. Parameters: NAME  The domain name TYPE  Resource Record type CLASS  Class the RR is in TTL  Time To Live for the RR

DnsRR::DnsRR (  domainname  NAME, u_int16  TYPE, u_int16  CLASS, u_int32  TTL, uint16_t  RDLENGTH, const char *  RDATA )

constructor taking some fields This constructor sets the values of all class members, including the RR data. Parameters: NAME  The domain name TYPE  Resource Record type CLASS  Class the RR is in TTL  Time To Live for the RR RDLENGTH  Length of RR data RDATA  RR data (this is copied into the RR)

DnsRR::DnsRR (  const DnsRR &  rr  )

copy constructor This constructor copies the given RR. It dynamically allocates its own copy of the RRs RDATA field. Parameters: rr  Resource Record to copy

DnsRR::~DnsRR (   )

destructor Frees all memory associated with the RR, including the RDATA.

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Member Function Documentation

DnsRR& DnsRR::operator= (  const DnsRR &  rr  )

assignment operator The assignment operator works the same as the copy constructor. Parameters: rr  Resource Record to copy

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Member Data Documentation

u_int16 DnsRR::CLASS

class The DNS class the RR is in. See DnsQuestion::QCLASS for a list, except that it can not be QCLASS_ALL in this case. Defaults to CLASS_IN. Definition at line 280 of file dnsmessage.h.

domainname DnsRR::NAME

domain name The domain name the Resource Record is bound to. Defaults to the root domain. Definition at line 264 of file dnsmessage.h.

char* DnsRR::RDATA

RR data. Binary data for the RR. Use the RR functions from rr.h to interpret this field. Automatically freed upon destruction. See also: rr_tostring(), rr_getdomain(), rr_getmail(), ... Definition at line 304 of file dnsmessage.h.

u_int16 DnsRR::RDLENGTH

length of RR data The length in bytes of the data pointed to by RDATA. Definition at line 295 of file dnsmessage.h.

u_int32 DnsRR::TTL

time to live The time to live for the RR - that is, the time in seconds it may be stored in cache. Definition at line 288 of file dnsmessage.h.

u_int16 DnsRR::TYPE

RR type. The type of the RR. One of the constants defined in dnsdefs.h, for example DNS_TYPE_A or DNS_TYPE_MX (or the value of the rr_type.type field). Definition at line 272 of file dnsmessage.h.

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The documentation for this class was generated from the following file:

• poslib/dnsmessage.h

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