A class that parses a DNS Message. More...

#include <dnsmessages.hh>

Collaboration diagram for DNSMessageReader:

Public Member Functions
	DNSMessageReader (const char *input, uint16_t length)

	DNSMessageReader (const std::string &str)

bool	eor () const
	are we at the end of a record? More...

void	getQuestion (DNSName &name, DNSType &type) const
	Copies the qname and type to you. More...

bool	getEDNS (uint16_t newsize, bool doBit) const
	Returns true if there was an EDNS record, plus copies details. More...

bool	getRR (DNSSection &section, DNSName &name, DNSType &type, uint32_t &ttl, std::unique_ptr< RRGen > &content)
	Puts the next RR in content, unless at 'end of message', in which case it returns false. More...

void	skipRRs (int n)
	Skip over n RRs. More...

void	xfrName (DNSName &ret, uint16_t *pos=0)

DNSName	getName (uint16_t *pos=0)
	Convenience form of xfrName that returns its result. More...

void	xfrUInt8 (uint8_t &res, uint16_t *pos=0)
	Gets the next 8 bit unsigned integer from the message, or the one from 'pos'. More...

uint8_t	getUInt8 (uint16_t *pos=0)
	Convenience form that returns the next 8 bit integer, or from pos. More...

void	xfrUInt16 (uint16_t &res)
	Gets the next 16 bit unsigned integer from the message. More...

void	xfrType (DNSType &type)
	For symmetry, this reads a type. More...

uint16_t	getUInt16 ()
	Convenience form that returns the next 16 bit integer. More...

void	xfrUInt32 (uint32_t &res)
	Gets the next 32 bit unsigned integer from the message. More...

void	xfrTxt (std::string &blob)

void	xfrBlob (std::string &blob, int size, uint16_t *pos=0)
	Gets the next size bytes from the message, of from pos. More...

std::string	getBlob (int size, uint16_t *pos=0)
	Convenience function that returns next size bytes of the message, or from pos. More...

Public Attributes
struct dnsheader	dh =dnsheader{}
	the DNS header More...

std::vector< uint8_t >	payload
	The payload. More...

uint16_t	payloadpos {0}
	Current position of processing. More...

uint16_t	rrpos {0}
	Used in getRR to set section correctly. More...

uint16_t	d_endofrecord

uint8_t	d_ednsVersion {0}

DNSName	d_qname

DNSType	d_qtype {(DNSType)0}

DNSClass	d_qclass {(DNSClass)0}

uint16_t	d_bufsize

bool	d_doBit {false}

bool	d_haveEDNS {false}

Detailed Description

A class that parses a DNS Message.

Constructor & Destructor Documentation

DNSMessageReader::DNSMessageReader	(	const char *	input,
		uint16_t	length
	)

DNSMessageReader::DNSMessageReader ( const std::string & str )

inline

Member Function Documentation

bool DNSMessageReader::eor ( ) const

inline

are we at the end of a record?

std::string DNSMessageReader::getBlob	(	int	size,
		uint16_t *	pos = `0`
	)

inline

Convenience function that returns next size bytes of the message, or from pos.

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bool DNSMessageReader::getEDNS	(	uint16_t *	newsize,
		bool *	doBit
	)		const

Returns true if there was an EDNS record, plus copies details.

DNSName DNSMessageReader::getName ( uint16_t * pos = 0 )

inline

Convenience form of xfrName that returns its result.

void DNSMessageReader::getQuestion	(	DNSName &	name,
		DNSType &	type
	)		const

Copies the qname and type to you.

bool DNSMessageReader::getRR	(	DNSSection &	section,
		DNSName &	name,
		DNSType &	type,
		uint32_t &	ttl,
		std::unique_ptr< RRGen > &	content
	)

Puts the next RR in content, unless at 'end of message', in which case it returns false.

uint16_t DNSMessageReader::getUInt16 ( )

inline

Convenience form that returns the next 16 bit integer.

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uint8_t DNSMessageReader::getUInt8 ( uint16_t * pos = 0 )

inline

Convenience form that returns the next 8 bit integer, or from pos.

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void DNSMessageReader::skipRRs ( int n )

Skip over n RRs.

void DNSMessageReader::xfrBlob	(	std::string &	blob,
		int	size,
		uint16_t *	pos = `0`
	)

inline

Gets the next size bytes from the message, of from pos.

void DNSMessageReader::xfrName	(	DNSName &	ret,
		uint16_t *	pos = `0`
	)

put the next name in ret, or copy it from pos

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void DNSMessageReader::xfrTxt ( std::string & blob )

inline

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void DNSMessageReader::xfrType ( DNSType & type )

inline

For symmetry, this reads a type.

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void DNSMessageReader::xfrUInt16 ( uint16_t & res )

inline

Gets the next 16 bit unsigned integer from the message.

void DNSMessageReader::xfrUInt32 ( uint32_t & res )

inline

Gets the next 32 bit unsigned integer from the message.

void DNSMessageReader::xfrUInt8	(	uint8_t &	res,
		uint16_t *	pos = `0`
	)

inline

Gets the next 8 bit unsigned integer from the message, or the one from 'pos'.

Member Data Documentation

uint16_t DNSMessageReader::d_bufsize

bool DNSMessageReader::d_doBit {false}

uint8_t DNSMessageReader::d_ednsVersion {0}

uint16_t DNSMessageReader::d_endofrecord

bool DNSMessageReader::d_haveEDNS {false}

DNSClass DNSMessageReader::d_qclass {(DNSClass)0}

DNSName DNSMessageReader::d_qname

DNSType DNSMessageReader::d_qtype {(DNSType)0}

struct dnsheader DNSMessageReader::dh =dnsheader{}

the DNS header

std::vector<uint8_t> DNSMessageReader::payload

The payload.

uint16_t DNSMessageReader::payloadpos {0}

Current position of processing.

uint16_t DNSMessageReader::rrpos {0}

Used in getRR to set section correctly.

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

Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation