pcpp::IDnsResource Class Reference

#include <DnsResource.h>

Inheritance diagram for pcpp::IDnsResource:

Public Member Functions
DnsType	getDnsType () const
void	setDnsType (DnsType newType)
DnsClass	getDnsClass () const
void	setDnsClass (DnsClass newClass)
std::string	getName () const
size_t	getNameOffset () const
bool	setName (const std::string &newName)
virtual size_t	getSize () const =0
virtual DnsResourceType	getType () const =0

Detailed Description

An abstract class for representing all types of DNS records. This class gives access to all available record data such as DNS type, class, name, type of record, etc. The DnsLayer holds an instance of (inherited type of) this class for each DNS record in the DNS packet

Member Function Documentation

getDnsClass()

DnsClass pcpp::IDnsResource::getDnsClass

(

)

const

Returns

The DNS class of this record

getDnsType()

DnsType pcpp::IDnsResource::getDnsType

(

)

const

Returns

The DNS type of this record

getName()

std::string pcpp::IDnsResource::getName ( ) const

inline

Returns

The name of this record

getNameOffset()

size_t pcpp::IDnsResource::getNameOffset ( ) const

inline

Returns

The record name's offset in the packet

getSize()

virtual size_t pcpp::IDnsResource::getSize ( ) const

pure virtual

Returns

The total size in bytes of this record

Implemented in pcpp::DnsResource, and pcpp::DnsQuery.

getType()

virtual DnsResourceType pcpp::IDnsResource::getType ( ) const

pure virtual

Returns

The type of this record (query, answer, authority, additional)

Implemented in pcpp::DnsResource, and pcpp::DnsQuery.

setDnsClass()

void pcpp::IDnsResource::setDnsClass

(

DnsClass

newClass

)

Set DNS class for this record

Parameters

[in]

newClass

The class to set

setDnsType()

void pcpp::IDnsResource::setDnsType

(

DnsType

newType

)

Set DNS type for this record

Parameters

[in]

newType

The type to set

setName()

bool pcpp::IDnsResource::setName

(

const std::string &

newName

)

Set the name of this record. The input name can be a standard hostname (e.g 'google.com'), or it may contain a pointer to another string in the packet (as explained here: http://www.zytrax.com/books/dns/ch15/#name). The pointer is used to reduce the DNS packet size and avoid unnecessary duplications. In case you want to use a pointer in your string you should use the following format: 'some.domain.#{offset}' where '#{offset}' is a the offset from the start of the layer. For example: if the string 'yahoo.com' already appears in offset 12 in the packet and you want to set the name of the current record to 'my.subdomain.yahoo.com' you may use the following string: 'my.subdomain.#12'. This will result in writing 'my.subdomain' and a pointer to offset 12.
Please notice the new name can be shorter or longer of the old name, so this method can cause the packet to be shorten or extended

Parameters

[in]

newName

The name to set

Returns

True if name was set successfully or false if input string is malformed or if an error occurred