rfc1035.cc File Reference

#include "squid.h"
#include "dns/rfc1035.h"
#include "dns/rfc2671.h"
#include "util.h"
#include <cassert>
#include <cstring>

Include dependency graph for rfc1035.cc:

Go to the source code of this file.

Macros
#define	RFC1035_MAXLABELSZ   63
#define	rfc1035_unpack_error   15
#define	RFC1035_UNPACK_DEBUG   (void)0

Functions
int	rfc1035HeaderPack (char *buf, size_t sz, rfc1035_message *hdr)
static int	rfc1035LabelPack (char *buf, size_t sz, const char *label)
static int	rfc1035NamePack (char *buf, size_t sz, const char *name)
int	rfc1035QuestionPack (char *buf, const size_t sz, const char *name, const unsigned short type, const unsigned short _class)
int	rfc1035HeaderUnpack (const char *buf, size_t sz, unsigned int *off, rfc1035_message *h)
static int	rfc1035NameUnpack (const char *buf, size_t sz, unsigned int *off, unsigned short *rdlength, char *name, size_t ns, int rdepth)
int	rfc1035RRPack (char *buf, const size_t sz, const rfc1035_rr *RR)
static int	rfc1035RRUnpack (const char *buf, size_t sz, unsigned int *off, rfc1035_rr *RR)
const char *	rfc1035ErrorMessage (int n)
void	rfc1035RRDestroy (rfc1035_rr **rr, int n)
static int	rfc1035QueryUnpack (const char *buf, size_t sz, unsigned int *off, rfc1035_query *query)
void	rfc1035MessageDestroy (rfc1035_message **msg)
int	rfc1035QueryCompare (const rfc1035_query *a, const rfc1035_query *b)
int	rfc1035MessageUnpack (const char *buf, size_t sz, rfc1035_message **answer)
ssize_t	rfc1035BuildAQuery (const char *hostname, char *buf, size_t sz, unsigned short qid, rfc1035_query *query, ssize_t edns_sz)
ssize_t	rfc1035BuildPTRQuery (const struct in_addr addr, char *buf, size_t sz, unsigned short qid, rfc1035_query *query, ssize_t edns_sz)
void	rfc1035SetQueryID (char *buf, unsigned short qid)

Macro Definition Documentation

RFC1035_MAXLABELSZ

#define RFC1035_MAXLABELSZ   63

Definition at line 40 of file rfc1035.cc.

RFC1035_UNPACK_DEBUG

#define RFC1035_UNPACK_DEBUG   (void)0

Definition at line 46 of file rfc1035.cc.

rfc1035_unpack_error

#define rfc1035_unpack_error   15

Definition at line 41 of file rfc1035.cc.

Function Documentation

rfc1035BuildAQuery()

ssize_t rfc1035BuildAQuery	(	const char *	hostname,
		char *	buf,
		size_t	sz,
		unsigned short	qid,
		rfc1035_query *	query,
		ssize_t	edns_sz
	)

Definition at line 658 of file rfc1035.cc.

References _rfc1035_message::arcount, assert, _rfc1035_message::id, int, _rfc1035_query::name, _rfc1035_message::opcode, _rfc1035_query::qclass, _rfc1035_message::qdcount, _rfc1035_message::qr, _rfc1035_query::qtype, _rfc1035_message::rd, RFC1035_CLASS_IN, RFC1035_TYPE_A, rfc1035HeaderPack(), rfc1035QuestionPack(), rfc2671RROptPack(), and xstrncpy().

rfc1035BuildPTRQuery()

ssize_t rfc1035BuildPTRQuery	(	const struct in_addr	addr,
		char *	buf,
		size_t	sz,
		unsigned short	qid,
		rfc1035_query *	query,
		ssize_t	edns_sz
	)

Definition at line 697 of file rfc1035.cc.

References _rfc1035_message::arcount, assert, _rfc1035_message::id, int, _rfc1035_query::name, _rfc1035_message::opcode, _rfc1035_query::qclass, _rfc1035_message::qdcount, _rfc1035_message::qr, _rfc1035_query::qtype, _rfc1035_message::rd, RFC1035_CLASS_IN, RFC1035_TYPE_PTR, rfc1035HeaderPack(), rfc1035QuestionPack(), rfc2671RROptPack(), and xstrncpy().

rfc1035ErrorMessage()

const char * rfc1035ErrorMessage

(

int

n

)

Definition at line 444 of file rfc1035.cc.

References rfc1035_unpack_error.

Referenced by idnsCheckQueue(), idnsGrokReply(), and TestRfc1035::testBugPacketHeadersOnly().

rfc1035HeaderPack()

int rfc1035HeaderPack	(	char *	buf,
		size_t	sz,
		rfc1035_message *	hdr
	)

Definition at line 56 of file rfc1035.cc.

References _rfc1035_message::aa, _rfc1035_message::ancount, _rfc1035_message::arcount, assert, _rfc1035_message::id, _rfc1035_message::nscount, _rfc1035_message::opcode, _rfc1035_message::qdcount, _rfc1035_message::qr, _rfc1035_message::ra, _rfc1035_message::rcode, _rfc1035_message::rd, and _rfc1035_message::tc.

Referenced by rfc1035BuildAQuery(), rfc1035BuildPTRQuery(), and rfc3596BuildHostQuery().

rfc1035HeaderUnpack()

int rfc1035HeaderUnpack	(	const char *	buf,
		size_t	sz,
		unsigned int *	off,
		rfc1035_message *	h
	)

Definition at line 180 of file rfc1035.cc.

References _rfc1035_message::aa, _rfc1035_message::ancount, _rfc1035_message::arcount, assert, _rfc1035_message::id, _rfc1035_message::nscount, _rfc1035_message::opcode, _rfc1035_message::qdcount, _rfc1035_message::qr, _rfc1035_message::ra, _rfc1035_message::rcode, _rfc1035_message::rd, and _rfc1035_message::tc.

Referenced by rfc1035MessageUnpack(), TestRfc1035::testBugPacketEndingOnCompressionPtr(), TestRfc1035::testBugPacketHeadersOnly(), and TestRfc1035::testHeaderUnpack().

rfc1035LabelPack()

static int rfc1035LabelPack ( char *  buf, size_t  sz, const char *  label  )

static

Definition at line 101 of file rfc1035.cc.

References assert, and RFC1035_MAXLABELSZ.

Referenced by rfc1035NamePack().

rfc1035MessageDestroy()

void rfc1035MessageDestroy

(

rfc1035_message **

msg

)

Definition at line 530 of file rfc1035.cc.

References rfc1035RRDestroy(), and xfree.

Referenced by idns_query::~idns_query(), idnsGrokReply(), rfc1035MessageUnpack(), TestRfc1035::testBugPacketEndingOnCompressionPtr(), and TestRfc1035::testParseAPacket().

rfc1035MessageUnpack()

int rfc1035MessageUnpack	(	const char *	buf,
		size_t	sz,
		rfc1035_message **	answer
	)

Definition at line 584 of file rfc1035.cc.

References _rfc1035_message::ancount, _rfc1035_message::answer, int, _rfc1035_message::qdcount, _rfc1035_message::query, _rfc1035_message::rcode, RFC1035_UNPACK_DEBUG, rfc1035_unpack_error, rfc1035HeaderUnpack(), rfc1035MessageDestroy(), rfc1035QueryUnpack(), rfc1035RRUnpack(), xcalloc(), and xfree.

Referenced by idnsGrokReply(), TestRfc1035::testBugPacketEndingOnCompressionPtr(), TestRfc1035::testBugPacketHeadersOnly(), and TestRfc1035::testParseAPacket().

rfc1035NamePack()

static int rfc1035NamePack ( char *  buf, size_t  sz, const char *  name  )

static

Definition at line 126 of file rfc1035.cc.

References assert, rfc1035LabelPack(), xfree, and xstrdup.

Referenced by rfc1035QuestionPack(), and rfc1035RRPack().

rfc1035NameUnpack()

static int rfc1035NameUnpack ( const char *  buf, size_t  sz, unsigned int *  off, unsigned short *  rdlength, char *  name, size_t  ns, int  rdepth  )

static

Definition at line 243 of file rfc1035.cc.

References assert, RFC1035_MAXLABELSZ, RFC1035_UNPACK_DEBUG, rfc1035NameUnpack(), and size_t.

Referenced by rfc1035NameUnpack(), rfc1035QueryUnpack(), and rfc1035RRUnpack().

rfc1035QueryCompare()

int rfc1035QueryCompare	(	const rfc1035_query *	a,
		const rfc1035_query *	b
	)

Definition at line 550 of file rfc1035.cc.

References _rfc1035_query::name, _rfc1035_query::qclass, and _rfc1035_query::qtype.

Referenced by idnsGrokReply().

rfc1035QueryUnpack()

static int rfc1035QueryUnpack ( const char *  buf, size_t  sz, unsigned int *  off, rfc1035_query *  query  )

static

Definition at line 507 of file rfc1035.cc.

References _rfc1035_query::name, _rfc1035_query::qclass, _rfc1035_query::qtype, RFC1035_MAXHOSTNAMESZ, RFC1035_UNPACK_DEBUG, and rfc1035NameUnpack().

Referenced by rfc1035MessageUnpack().

rfc1035QuestionPack()

int rfc1035QuestionPack	(	char *	buf,
		const size_t	sz,
		const char *	name,
		const unsigned short	type,
		const unsigned short	_class
	)

Definition at line 149 of file rfc1035.cc.

References assert, and rfc1035NamePack().

Referenced by rfc1035BuildAQuery(), rfc1035BuildPTRQuery(), and rfc3596BuildHostQuery().

rfc1035RRDestroy()

void rfc1035RRDestroy	(	rfc1035_rr **	rr,
		int	n
	)

Definition at line 483 of file rfc1035.cc.

References xfree.

Referenced by rfc1035MessageDestroy().

rfc1035RRPack()

int rfc1035RRPack	(	char *	buf,
		const size_t	sz,
		const rfc1035_rr *	RR
	)

Definition at line 325 of file rfc1035.cc.

References rfc1035_rr::_class, assert, rfc1035_rr::name, rfc1035_rr::rdata, rfc1035_rr::rdlength, rfc1035NamePack(), rfc1035_rr::ttl, and rfc1035_rr::type.

Referenced by rfc2671RROptPack().

rfc1035RRUnpack()

static int rfc1035RRUnpack ( const char *  buf, size_t  sz, unsigned int *  off, rfc1035_rr *  RR  )

static

Definition at line 369 of file rfc1035.cc.

References rfc1035_rr::_class, assert, rfc1035_rr::name, rfc1035_rr::rdata, rfc1035_rr::rdlength, RFC1035_MAXHOSTNAMESZ, RFC1035_TYPE_A, RFC1035_TYPE_PTR, RFC1035_UNPACK_DEBUG, rfc1035NameUnpack(), rfc1035_rr::ttl, rfc1035_rr::type, xfree, and xmalloc.

Referenced by rfc1035MessageUnpack().

rfc1035SetQueryID()

void rfc1035SetQueryID	(	char *	buf,
		unsigned short	qid
	)

Definition at line 739 of file rfc1035.cc.