base::DNS Class Reference

DNS resolver library. More...

#include <libppbase/base/DNS.h>

List of all members.

Public Member Functions
	DNS ()
	Constructor.
	~DNS ()
	Destructor.
int	errcode () const
	Returns error code of last query.
bool	existsARecord (const String &host)
	Checks if an A record exists.
bool	existsDomain (const String &domain)
	Checks if a domain exists (can send mail to user @ domain).
bool	existsHost (const String &host)
	Checks if a host exists.
bool	existsMX (const String &host)
	Checks if an mx record for a host exists.
bool	existsRecord (const String &domain, int *types, int ntypes)
	Queries dns.
bool	failed () const
	Checks if last query failed.
String	fqdn ()
	Returns local host name, including domain (FQDN).
String	hostname ()
	Returns local host name.
bool	isValidEmailAddr (const String &email)
	Checks a email address for validity.
String	lookup (const String &ipaddr)
	Looks up the host name for an ip address.
String	resolve (const String &host)
	Resolves a host name to an ip address.

---

Detailed Description

DNS resolver library.

Author:

Christoph Schwarz

Version:

$Id: DNS.h 21 2010-09-05 04:18:17Z cschwarz1 $

---

Member Function Documentation

int base::DNS::errcode

(

)

const

Returns error code of last query.

Returns:

error code, 0=success, other=failure

bool base::DNS::existsARecord

(

const String &

host

)

Checks if an A record exists.

Parameters:

host

the host name

Returns:

true=exists, false=does not exist

bool base::DNS::existsDomain

(

const String &

domain

)

Checks if a domain exists (can send mail to user @ domain).

Parameters:

domain

the domain name

Returns:

true=exists, false=does not exist

bool base::DNS::existsHost

(

const String &

host

)

Checks if a host exists.

Parameters:

host

the host name

Returns:

true=exists, false=does not exist

bool base::DNS::existsMX

(

const String &

host

)

Checks if an mx record for a host exists.

Parameters:

host

the host name

Returns:

true=exists, false=does not exist

bool base::DNS::existsRecord	(	const String &	domain,
		int *	types,
		int	ntypes
	)

Queries dns.

Parameters:

	domain	domain name
	types	array of record types
	ntypes	number of entries in types array

Returns:

true=record exists, false=record does not exist

bool base::DNS::failed

(

)

const

Checks if last query failed.

Returns:

flag: true=failed, false=succeeded

String base::DNS::fqdn

(

)

Returns local host name, including domain (FQDN).

Returns:

local host name, including domain

String base::DNS::hostname

(

)

Returns local host name.

Returns:

local host name

bool base::DNS::isValidEmailAddr

(

const String &

email

)

Checks a email address for validity.

Parameters:

email

address to check

Returns:

true if it is valid, false if not

String base::DNS::lookup

(

const String &

ipaddr

)

Looks up the host name for an ip address.

Parameters:

ipaddr

the ip address in dot-numbers notation

Returns:

the host name

String base::DNS::resolve

(

const String &

host

)

Resolves a host name to an ip address.

Parameters:

host

the hostname to resolve

Returns:

ip address

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

• libppbase/base/DNS.h