OpenDNSSEC-signer  2.0.4
Data Structures | Macros | Typedefs | Functions | Variables
buffer.h File Reference
#include "config.h"
#include "status.h"
#include "log.h"
#include <ldns/ldns.h>
#include <stdint.h>

Go to the source code of this file.

Data Structures

struct  buffer_struct
 

Macros

#define BUFFER_PKT_HEADER_SIZE   12
 
#define MAXDOMAINLEN   255
 
#define MAXLABELLEN   63
 
#define MAX_RDLENGTH   65535
 
#define MAX_RR_SIZE   (MAXDOMAINLEN + sizeof(uint32_t) + 4*sizeof(uint16_t) + MAX_RDLENGTH)
 
#define MAX_PACKET_SIZE   65535
 
#define PACKET_BUFFER_SIZE   (MAX_PACKET_SIZE + MAX_RR_SIZE)
 
#define QR_MASK   0x80U
 
#define QR_SHIFT   7
 
#define QR(packet)   (*buffer_at((packet), 2) & QR_MASK)
 
#define QR_SET(packet)   (*buffer_at((packet), 2) |= QR_MASK)
 
#define QR_CLR(packet)   (*buffer_at((packet), 2) &= ~QR_MASK)
 
#define OPCODE_MASK   0x78U
 
#define OPCODE_SHIFT   3
 
#define OPCODE(packet)   ((*buffer_at((packet), 2) & OPCODE_MASK) >> OPCODE_SHIFT)
 
#define OPCODE_SET(packet, opcode)   (*buffer_at((packet), 2) = (*buffer_at((packet), 2) & ~OPCODE_MASK) | ((opcode) << OPCODE_SHIFT))
 
#define AA_MASK   0x04U
 
#define AA_SHIFT   2
 
#define AA(packet)   (*buffer_at((packet), 2) & AA_MASK)
 
#define AA_SET(packet)   (*buffer_at((packet), 2) |= AA_MASK)
 
#define AA_CLR(packet)   (*buffer_at((packet), 2) &= ~AA_MASK)
 
#define TC_MASK   0x02U
 
#define TC_SHIFT   1
 
#define TC(packet)   (*buffer_at((packet), 2) & TC_MASK)
 
#define TC_SET(packet)   (*buffer_at((packet), 2) |= TC_MASK)
 
#define TC_CLR(packet)   (*buffer_at((packet), 2) &= ~TC_MASK)
 
#define RD_MASK   0x01U
 
#define RD_SHIFT   0
 
#define RD(packet)   (*buffer_at((packet), 2) & RD_MASK)
 
#define RD_SET(packet)   (*buffer_at((packet), 2) |= RD_MASK)
 
#define RD_CLR(packet)   (*buffer_at((packet), 2) &= ~RD_MASK)
 
#define RA_MASK   0x80U
 
#define RA_SHIFT   7
 
#define RA(packet)   (*buffer_at((packet), 3) & RA_MASK)
 
#define RA_SET(packet)   (*buffer_at((packet), 3) |= RA_MASK)
 
#define RA_CLR(packet)   (*buffer_at((packet), 3) &= ~RA_MASK)
 
#define AD_MASK   0x20U
 
#define AD_SHIFT   5
 
#define AD(packet)   (*buffer_at((packet), 3) & AD_MASK)
 
#define AD_SET(packet)   (*buffer_at((packet), 3) |= AD_MASK)
 
#define AD_CLR(packet)   (*buffer_at((packet), 3) &= ~AD_MASK)
 
#define CD_MASK   0x10U
 
#define CD_SHIFT   4
 
#define CD(packet)   (*buffer_at((packet), 3) & CD_MASK)
 
#define CD_SET(packet)   (*buffer_at((packet), 3) |= CD_MASK)
 
#define CD_CLR(packet)   (*buffer_at((packet), 3) &= ~CD_MASK)
 
#define RCODE_MASK   0x0fU
 
#define RCODE_SHIFT   0
 
#define RCODE(packet)   (*buffer_at((packet), 3) & RCODE_MASK)
 
#define RCODE_SET(packet, rcode)   (*buffer_at((packet), 3) = (*buffer_at((packet), 3) & ~RCODE_MASK) | (rcode))
 

Typedefs

typedef struct buffer_struct buffer_type
 

Functions

buffer_typebuffer_create (size_t capacity)
 
void buffer_clear (buffer_type *buffer)
 
void buffer_flip (buffer_type *buffer)
 
size_t buffer_position (buffer_type *buffer)
 
void buffer_set_position (buffer_type *buffer, size_t pos)
 
void buffer_skip (buffer_type *buffer, ssize_t count)
 
int buffer_skip_dname (buffer_type *buffer)
 
int buffer_skip_rr (buffer_type *buffer, unsigned qrr)
 
size_t buffer_limit (buffer_type *buffer)
 
void buffer_set_limit (buffer_type *buffer, size_t limit)
 
size_t buffer_capacity (buffer_type *buffer)
 
uint8_t * buffer_at (buffer_type *buffer, size_t at)
 
uint8_t * buffer_begin (buffer_type *buffer)
 
uint8_t * buffer_current (buffer_type *buffer)
 
size_t buffer_remaining (buffer_type *buffer)
 
int buffer_available (buffer_type *buffer, size_t count)
 
void buffer_write (buffer_type *buffer, const void *data, size_t count)
 
void buffer_write_u8 (buffer_type *buffer, uint8_t data)
 
void buffer_write_u16 (buffer_type *buffer, uint16_t data)
 
void buffer_write_u16_at (buffer_type *buffer, size_t at, uint16_t data)
 
void buffer_write_u32 (buffer_type *buffer, uint32_t data)
 
void buffer_write_rdf (buffer_type *buffer, ldns_rdf *rdf)
 
int buffer_write_rr (buffer_type *buffer, ldns_rr *rr)
 
void buffer_read (buffer_type *buffer, void *data, size_t count)
 
uint8_t buffer_read_u8 (buffer_type *buffer)
 
uint16_t buffer_read_u16 (buffer_type *buffer)
 
uint32_t buffer_read_u32 (buffer_type *buffer)
 
size_t buffer_read_dname (buffer_type *buffer, uint8_t *dname, unsigned allow_pointers)
 
uint16_t buffer_pkt_id (buffer_type *buffer)
 
void buffer_pkt_set_random_id (buffer_type *buffer)
 
uint16_t buffer_pkt_flags (buffer_type *buffer)
 
void buffer_pkt_set_flags (buffer_type *buffer, uint16_t flags)
 
int buffer_pkt_qr (buffer_type *buffer)
 
void buffer_pkt_set_qr (buffer_type *buffer)
 
void buffer_pkt_clear_qr (buffer_type *buffer)
 
int buffer_pkt_aa (buffer_type *buffer)
 
void buffer_pkt_set_aa (buffer_type *buffer)
 
int buffer_pkt_tc (buffer_type *buffer)
 
int buffer_pkt_rd (buffer_type *buffer)
 
int buffer_pkt_ra (buffer_type *buffer)
 
int buffer_pkt_ad (buffer_type *buffer)
 
int buffer_pkt_cd (buffer_type *buffer)
 
ldns_pkt_opcode buffer_pkt_opcode (buffer_type *buffer)
 
void buffer_pkt_set_opcode (buffer_type *buffer, ldns_pkt_opcode opcode)
 
ldns_pkt_rcode buffer_pkt_rcode (buffer_type *buffer)
 
void buffer_pkt_set_rcode (buffer_type *buffer, ldns_pkt_rcode rcode)
 
const char * buffer_rcode2str (ldns_pkt_rcode rcode)
 
uint16_t buffer_pkt_qdcount (buffer_type *buffer)
 
void buffer_pkt_set_qdcount (buffer_type *buffer, uint16_t count)
 
uint16_t buffer_pkt_ancount (buffer_type *buffer)
 
void buffer_pkt_set_ancount (buffer_type *buffer, uint16_t count)
 
uint16_t buffer_pkt_nscount (buffer_type *buffer)
 
void buffer_pkt_set_nscount (buffer_type *buffer, uint16_t count)
 
uint16_t buffer_pkt_arcount (buffer_type *buffer)
 
void buffer_pkt_set_arcount (buffer_type *buffer, uint16_t count)
 
void buffer_pkt_query (buffer_type *buffer, ldns_rdf *qname, ldns_rr_type qtype, ldns_rr_class qclass)
 
void buffer_pkt_notify (buffer_type *buffer, ldns_rdf *qname, ldns_rr_class qclass)
 
void buffer_cleanup (buffer_type *buffer)
 

Variables

ods_lookup_table ods_rcode_str []
 

Macro Definition Documentation

◆ AA

#define AA (   packet)    (*buffer_at((packet), 2) & AA_MASK)

Definition at line 66 of file buffer.h.

Referenced by buffer_pkt_aa().

◆ AA_CLR

#define AA_CLR (   packet)    (*buffer_at((packet), 2) &= ~AA_MASK)

Definition at line 68 of file buffer.h.

◆ AA_MASK

#define AA_MASK   0x04U

Definition at line 64 of file buffer.h.

◆ AA_SET

#define AA_SET (   packet)    (*buffer_at((packet), 2) |= AA_MASK)

Definition at line 67 of file buffer.h.

Referenced by buffer_pkt_set_aa().

◆ AA_SHIFT

#define AA_SHIFT   2

Definition at line 65 of file buffer.h.

◆ AD

#define AD (   packet)    (*buffer_at((packet), 3) & AD_MASK)

Definition at line 90 of file buffer.h.

Referenced by buffer_pkt_ad().

◆ AD_CLR

#define AD_CLR (   packet)    (*buffer_at((packet), 3) &= ~AD_MASK)

Definition at line 92 of file buffer.h.

◆ AD_MASK

#define AD_MASK   0x20U

Definition at line 88 of file buffer.h.

◆ AD_SET

#define AD_SET (   packet)    (*buffer_at((packet), 3) |= AD_MASK)

Definition at line 91 of file buffer.h.

◆ AD_SHIFT

#define AD_SHIFT   5

Definition at line 89 of file buffer.h.

◆ BUFFER_PKT_HEADER_SIZE

#define BUFFER_PKT_HEADER_SIZE   12

Packet buffer.

Definition at line 43 of file buffer.h.

Referenced by axfr(), ixfr(), query_process(), and tsig_rr_find().

◆ CD

#define CD (   packet)    (*buffer_at((packet), 3) & CD_MASK)

Definition at line 96 of file buffer.h.

Referenced by buffer_pkt_cd().

◆ CD_CLR

#define CD_CLR (   packet)    (*buffer_at((packet), 3) &= ~CD_MASK)

Definition at line 98 of file buffer.h.

◆ CD_MASK

#define CD_MASK   0x10U

Definition at line 94 of file buffer.h.

◆ CD_SET

#define CD_SET (   packet)    (*buffer_at((packet), 3) |= CD_MASK)

Definition at line 97 of file buffer.h.

◆ CD_SHIFT

#define CD_SHIFT   4

Definition at line 95 of file buffer.h.

◆ MAX_PACKET_SIZE

#define MAX_PACKET_SIZE   65535

Definition at line 49 of file buffer.h.

Referenced by buffer_read_dname().

◆ MAX_RDLENGTH

#define MAX_RDLENGTH   65535

Definition at line 46 of file buffer.h.

◆ MAX_RR_SIZE

#define MAX_RR_SIZE   (MAXDOMAINLEN + sizeof(uint32_t) + 4*sizeof(uint16_t) + MAX_RDLENGTH)

Definition at line 47 of file buffer.h.

◆ MAXDOMAINLEN

#define MAXDOMAINLEN   255

Definition at line 44 of file buffer.h.

◆ MAXLABELLEN

#define MAXLABELLEN   63

Definition at line 45 of file buffer.h.

◆ OPCODE

#define OPCODE (   packet)    ((*buffer_at((packet), 2) & OPCODE_MASK) >> OPCODE_SHIFT)

Definition at line 60 of file buffer.h.

Referenced by buffer_pkt_opcode().

◆ OPCODE_MASK

#define OPCODE_MASK   0x78U

Definition at line 58 of file buffer.h.

◆ OPCODE_SET

#define OPCODE_SET (   packet,
  opcode 
)    (*buffer_at((packet), 2) = (*buffer_at((packet), 2) & ~OPCODE_MASK) | ((opcode) << OPCODE_SHIFT))

Definition at line 61 of file buffer.h.

Referenced by buffer_pkt_set_opcode().

◆ OPCODE_SHIFT

#define OPCODE_SHIFT   3

Definition at line 59 of file buffer.h.

◆ PACKET_BUFFER_SIZE

#define PACKET_BUFFER_SIZE   (MAX_PACKET_SIZE + MAX_RR_SIZE)

Definition at line 50 of file buffer.h.

Referenced by query_create(), and tcp_conn_create().

◆ QR

#define QR (   packet)    (*buffer_at((packet), 2) & QR_MASK)

Definition at line 54 of file buffer.h.

Referenced by buffer_pkt_qr().

◆ QR_CLR

#define QR_CLR (   packet)    (*buffer_at((packet), 2) &= ~QR_MASK)

Definition at line 56 of file buffer.h.

Referenced by buffer_pkt_clear_qr().

◆ QR_MASK

#define QR_MASK   0x80U

Definition at line 52 of file buffer.h.

◆ QR_SET

#define QR_SET (   packet)    (*buffer_at((packet), 2) |= QR_MASK)

Definition at line 55 of file buffer.h.

Referenced by buffer_pkt_set_qr().

◆ QR_SHIFT

#define QR_SHIFT   7

Definition at line 53 of file buffer.h.

◆ RA

#define RA (   packet)    (*buffer_at((packet), 3) & RA_MASK)

Definition at line 84 of file buffer.h.

Referenced by buffer_pkt_ra().

◆ RA_CLR

#define RA_CLR (   packet)    (*buffer_at((packet), 3) &= ~RA_MASK)

Definition at line 86 of file buffer.h.

◆ RA_MASK

#define RA_MASK   0x80U

Definition at line 82 of file buffer.h.

◆ RA_SET

#define RA_SET (   packet)    (*buffer_at((packet), 3) |= RA_MASK)

Definition at line 85 of file buffer.h.

◆ RA_SHIFT

#define RA_SHIFT   7

Definition at line 83 of file buffer.h.

◆ RCODE

#define RCODE (   packet)    (*buffer_at((packet), 3) & RCODE_MASK)

Definition at line 102 of file buffer.h.

Referenced by buffer_pkt_rcode().

◆ RCODE_MASK

#define RCODE_MASK   0x0fU

Definition at line 100 of file buffer.h.

◆ RCODE_SET

#define RCODE_SET (   packet,
  rcode 
)    (*buffer_at((packet), 3) = (*buffer_at((packet), 3) & ~RCODE_MASK) | (rcode))

Definition at line 103 of file buffer.h.

Referenced by buffer_pkt_set_rcode().

◆ RCODE_SHIFT

#define RCODE_SHIFT   0

Definition at line 101 of file buffer.h.

◆ RD

#define RD (   packet)    (*buffer_at((packet), 2) & RD_MASK)

Definition at line 78 of file buffer.h.

Referenced by buffer_pkt_rd().

◆ RD_CLR

#define RD_CLR (   packet)    (*buffer_at((packet), 2) &= ~RD_MASK)

Definition at line 80 of file buffer.h.

◆ RD_MASK

#define RD_MASK   0x01U

Definition at line 76 of file buffer.h.

◆ RD_SET

#define RD_SET (   packet)    (*buffer_at((packet), 2) |= RD_MASK)

Definition at line 79 of file buffer.h.

◆ RD_SHIFT

#define RD_SHIFT   0

Definition at line 77 of file buffer.h.

◆ TC

#define TC (   packet)    (*buffer_at((packet), 2) & TC_MASK)

Definition at line 72 of file buffer.h.

Referenced by buffer_pkt_tc().

◆ TC_CLR

#define TC_CLR (   packet)    (*buffer_at((packet), 2) &= ~TC_MASK)

Definition at line 74 of file buffer.h.

◆ TC_MASK

#define TC_MASK   0x02U

Definition at line 70 of file buffer.h.

◆ TC_SET

#define TC_SET (   packet)    (*buffer_at((packet), 2) |= TC_MASK)

Definition at line 73 of file buffer.h.

◆ TC_SHIFT

#define TC_SHIFT   1

Definition at line 71 of file buffer.h.

Typedef Documentation

◆ buffer_type

typedef struct buffer_struct buffer_type

Buffer.

Definition at line 111 of file buffer.h.

Function Documentation

◆ buffer_at()

uint8_t* buffer_at ( buffer_type buffer,
size_t  at 
)

Return a pointer to the data at the indicated position.

Parameters
[in]bufferbuffer
[in]atindicated position
Returns
uint8_t* pointer to the data at the indicated position

Return a pointer to the data at the indicated position.

Definition at line 413 of file buffer.c.

References buffer_struct::data.

Referenced by buffer_begin(), buffer_current(), and tsig_rr_update().

◆ buffer_available()

int buffer_available ( buffer_type buffer,
size_t  count 
)

Check if the buffer has enough bytes available.

Parameters
[in]bufferbuffer
[in]countnumber of bytes that needs to be available
Returns
int 0 if not enough bytes are available 1 otherwise

Check if the buffer has enough bytes available.

Definition at line 487 of file buffer.c.

Referenced by buffer_read_dname(), buffer_skip_dname(), buffer_skip_rr(), buffer_write_rr(), and query_add_rr().

◆ buffer_begin()

uint8_t* buffer_begin ( buffer_type buffer)

Return a pointer to the data at the beginning of the buffer.

Parameters
[in]bufferbuffer
Returns
uint8_t* pointer to the data at the begin of the buffer

Return a pointer to the data at the beginning of the buffer.

Definition at line 426 of file buffer.c.

References buffer_at().

◆ buffer_capacity()

size_t buffer_capacity ( buffer_type buffer)

Get the buffer's capacity.

Parameters
[in]bufferbuffer
Returns
size_t capacity

Get the buffer's capacity.

Definition at line 401 of file buffer.c.

References buffer_struct::capacity.

Referenced by query_prepare().

◆ buffer_cleanup()

void buffer_cleanup ( buffer_type buffer)

Clean up buffer.

Parameters
[in]bufferbuffer
[in]allocatormemory allocator

Clean up buffer.

Definition at line 1145 of file buffer.c.

References buffer_struct::data.

Referenced by query_cleanup(), and xfrhandler_cleanup().

◆ buffer_clear()

void buffer_clear ( buffer_type buffer)

Clear the buffer and make it ready for writing. The buffer's limit is set to the capacity and the position is set to 0.

Parameters
[in]bufferbuffer

Clear the buffer and make it ready for writing.

Definition at line 99 of file buffer.c.

References buffer_struct::capacity, buffer_struct::limit, and buffer_struct::position.

Referenced by query_prepare(), query_reset(), and tcp_conn_ready().

◆ buffer_create()

buffer_type* buffer_create ( size_t  capacity)

Create a new buffer with the specified capacity.

Parameters
[in]allocatormemory allocator
[in]capacityspecified capacity
Returns
buffer_type* buffer

Create a new buffer with the specified capacity.

Definition at line 78 of file buffer.c.

References buffer_struct::capacity, buffer_struct::data, buffer_struct::fixed, buffer_struct::limit, and buffer_struct::position.

Referenced by query_create(), and tcp_conn_create().

◆ buffer_current()

uint8_t* buffer_current ( buffer_type buffer)

Return a pointer to the data at the buffer's current position.

Parameters
[in]bufferbuffer
Returns
uint8_t* pointer to the data at the buffer's current position

Return a pointer to the data at the buffer's current position.

Definition at line 438 of file buffer.c.

References buffer_at(), and buffer_struct::position.

Referenced by query_process(), and tcp_conn_write().

◆ buffer_flip()

void buffer_flip ( buffer_type buffer)

Flip the buffer and make it ready for reading. The data that has been written to the buffer. The buffer's limit is set to the current position and the position is set to 0.

Parameters
[in]bufferbuffer

Flip the buffer and make it ready for reading.

Definition at line 112 of file buffer.c.

References buffer_struct::limit, and buffer_struct::position.

◆ buffer_limit()

size_t buffer_limit ( buffer_type buffer)

Get the buffer's limit.

Parameters
[in]bufferbuffer
Returns
size_t limit

Get the buffer's limit.

Definition at line 373 of file buffer.c.

References buffer_struct::limit.

Referenced by buffer_read_dname(), query_prepare(), query_process(), and tsig_rr_update().

◆ buffer_pkt_aa()

int buffer_pkt_aa ( buffer_type buffer)

Get AA bit from buffer.

Parameters
[in]bufferbuffer
Returns
int 0 if AA bit is clear 1 if AA bit is set

Get AA bit from buffer.

Definition at line 870 of file buffer.c.

References AA.

◆ buffer_pkt_ad()

int buffer_pkt_ad ( buffer_type buffer)

Get AD bit from buffer.

Parameters
[in]bufferbuffer
Returns
int 0 if AD bit is clear 1 if AD bit is set

Get AD bit from buffer.

Definition at line 930 of file buffer.c.

References AD.

◆ buffer_pkt_ancount()

uint16_t buffer_pkt_ancount ( buffer_type buffer)

Get ANCOUNT from buffer.

Parameters
[in]bufferbuffer
Returns
uint16_t ANCOUNT

Get ANCOUNT from buffer.

Definition at line 1018 of file buffer.c.

Referenced by axfr(), ixfr(), soa_request(), and tsig_rr_find().

◆ buffer_pkt_arcount()

uint16_t buffer_pkt_arcount ( buffer_type buffer)

Get ARCOUNT from buffer.

Parameters
[in]bufferbuffer
Returns
uint16_t ARCOUNT

Get ARCOUNT from buffer.

Definition at line 1066 of file buffer.c.

Referenced by query_add_optional(), and tsig_rr_find().

◆ buffer_pkt_cd()

int buffer_pkt_cd ( buffer_type buffer)

Get CD bit from buffer.

Parameters
[in]bufferbuffer
Returns
int 0 if CD bit is clear 1 if CD bit is set

Get CD bit from buffer.

Definition at line 942 of file buffer.c.

References CD.

◆ buffer_pkt_clear_qr()

void buffer_pkt_clear_qr ( buffer_type buffer)

Clear QR bit in buffer.

Parameters
[in]bufferbuffer

Clear QR bit in buffer.

Definition at line 834 of file buffer.c.

References QR_CLR.

◆ buffer_pkt_flags()

uint16_t buffer_pkt_flags ( buffer_type buffer)

Get flags from buffer.

Parameters
[in]bufferbuffer
Returns
uint16_t flags

Get flags from buffer.

Definition at line 786 of file buffer.c.

Referenced by query_prepare().

◆ buffer_pkt_id()

uint16_t buffer_pkt_id ( buffer_type buffer)

Get query id from buffer.

Parameters
[in]bufferbuffer
Returns
uint16_t query id

Get query id from buffer.

Definition at line 751 of file buffer.c.

◆ buffer_pkt_notify()

void buffer_pkt_notify ( buffer_type buffer,
ldns_rdf *  qname,
ldns_rr_class  qclass 
)

Make a new notify.

Parameters
[in]bufferbuffer
[in]qnameqname
[in]qclassqclass

Make a new notify.

Definition at line 1133 of file buffer.c.

◆ buffer_pkt_nscount()

uint16_t buffer_pkt_nscount ( buffer_type buffer)

Get NSCOUNT from buffer.

Parameters
[in]bufferbuffer
Returns
uint16_t NSCOUNT

Get NSCOUNT from buffer.

Definition at line 1042 of file buffer.c.

Referenced by tsig_rr_find().

◆ buffer_pkt_opcode()

ldns_pkt_opcode buffer_pkt_opcode ( buffer_type buffer)

Get OPCODE from buffer.

Parameters
[in]bufferbuffer
Returns
ldns_pkt_opcode OPCODE

Get OPCODE from buffer.

Definition at line 846 of file buffer.c.

References OPCODE.

◆ buffer_pkt_qdcount()

uint16_t buffer_pkt_qdcount ( buffer_type buffer)

Get QDCOUNT from buffer.

Parameters
[in]bufferbuffer
Returns
uint16_t QDCOUNT

Get QDCOUNT from buffer.

Definition at line 994 of file buffer.c.

Referenced by tsig_rr_find().

◆ buffer_pkt_qr()

int buffer_pkt_qr ( buffer_type buffer)

Get QR bit from buffer.

Parameters
[in]bufferbuffer
Returns
int 0 if QR bit is clear 1 if QR bit is set

Get QR bit from buffer.

Definition at line 810 of file buffer.c.

References QR.

Referenced by query_process(), and tsig_rr_update().

◆ buffer_pkt_query()

void buffer_pkt_query ( buffer_type buffer,
ldns_rdf *  qname,
ldns_rr_type  qtype,
ldns_rr_class  qclass 
)

Make a new query.

Parameters
[in]bufferbuffer
[in]qnameqname
[in]qtypeqtype
[in]qclassqclass

Make a new query.

Definition at line 1120 of file buffer.c.

◆ buffer_pkt_ra()

int buffer_pkt_ra ( buffer_type buffer)

Get RA bit from buffer.

Parameters
[in]bufferbuffer
Returns
int 0 if RA bit is clear 1 if RA bit is set

Get RA bit from buffer.

Definition at line 918 of file buffer.c.

References RA.

◆ buffer_pkt_rcode()

ldns_pkt_rcode buffer_pkt_rcode ( buffer_type buffer)

Get RCODE from buffer.

Parameters
[in]bufferbuffer
Returns
ldns_pkt_rcode RCODE

Get RCODE from buffer.

Definition at line 954 of file buffer.c.

References RCODE.

◆ buffer_pkt_rd()

int buffer_pkt_rd ( buffer_type buffer)

Get RD bit from buffer.

Parameters
[in]bufferbuffer
Returns
int 0 if RD bit is clear 1 if RD bit is set

Get RD bit from buffer.

Definition at line 906 of file buffer.c.

References RD.

◆ buffer_pkt_set_aa()

void buffer_pkt_set_aa ( buffer_type buffer)

Set AA bit in buffer.

Parameters
[in]bufferbuffer

Set AA bit in buffer.

Definition at line 882 of file buffer.c.

References AA_SET.

Referenced by axfr(), and soa_request().

◆ buffer_pkt_set_ancount()

void buffer_pkt_set_ancount ( buffer_type buffer,
uint16_t  count 
)

Set ANCOUNT in buffer.

Parameters
[in]bufferbuffer
[in]countANCOUNT

Set ANCOUNT in buffer.

Definition at line 1030 of file buffer.c.

Referenced by axfr(), ixfr(), and soa_request().

◆ buffer_pkt_set_arcount()

void buffer_pkt_set_arcount ( buffer_type buffer,
uint16_t  count 
)

Set ARCOUNT in buffer.

Parameters
[in]bufferbuffer
[in]countARCOUNT

Set ARCOUNT in buffer.

Definition at line 1078 of file buffer.c.

Referenced by axfr(), ixfr(), query_add_optional(), and soa_request().

◆ buffer_pkt_set_flags()

void buffer_pkt_set_flags ( buffer_type buffer,
uint16_t  flags 
)

Set flags in buffer.

Parameters
[in]bufferbuffer
[in]flagsflags

Set flags in buffer.

Definition at line 798 of file buffer.c.

References buffer_write_u16_at().

Referenced by query_prepare().

◆ buffer_pkt_set_nscount()

void buffer_pkt_set_nscount ( buffer_type buffer,
uint16_t  count 
)

Set NSCOUNT in buffer.

Parameters
[in]bufferbuffer
[in]countNSCOUNT

Set NSCOUNT in buffer.

Definition at line 1054 of file buffer.c.

Referenced by axfr(), ixfr(), and soa_request().

◆ buffer_pkt_set_opcode()

void buffer_pkt_set_opcode ( buffer_type buffer,
ldns_pkt_opcode  opcode 
)

Set OPCODE in buffer.

Parameters
[in]bufferbuffer
[in]opcodeOPCODE

Set OPCODE in buffer.

Definition at line 858 of file buffer.c.

References OPCODE_SET.

◆ buffer_pkt_set_qdcount()

void buffer_pkt_set_qdcount ( buffer_type buffer,
uint16_t  count 
)

Set QDCOUNT in buffer.

Parameters
[in]bufferbuffer
[in]countQDCOUNT

Set QDCOUNT in buffer.

Definition at line 1006 of file buffer.c.

Referenced by axfr(), and ixfr().

◆ buffer_pkt_set_qr()

void buffer_pkt_set_qr ( buffer_type buffer)

Set QR bit in buffer.

Parameters
[in]bufferbuffer

Set QR bit in buffer.

Definition at line 822 of file buffer.c.

References QR_SET.

◆ buffer_pkt_set_random_id()

void buffer_pkt_set_random_id ( buffer_type buffer)

Set random query id in buffer.

Parameters
[in]bufferbuffer

Set random query id in buffer.

Definition at line 772 of file buffer.c.

◆ buffer_pkt_set_rcode()

void buffer_pkt_set_rcode ( buffer_type buffer,
ldns_pkt_rcode  rcode 
)

Set RCODE in buffer.

Parameters
[in]bufferbuffer
[in]rcodeRCODE

Set RCODE in buffer.

Definition at line 966 of file buffer.c.

References RCODE_SET.

Referenced by axfr(), ixfr(), and soa_request().

◆ buffer_pkt_tc()

int buffer_pkt_tc ( buffer_type buffer)

Get TC bit from buffer.

Parameters
[in]bufferbuffer
Returns
int 0 if TC bit is clear 1 if TC bit is set

Get TC bit from buffer.

Definition at line 894 of file buffer.c.

References TC.

◆ buffer_position()

size_t buffer_position ( buffer_type buffer)

Get the buffer's position.

Parameters
[in]bufferbuffer
Returns
size_t position

Get the buffer's position.

Definition at line 125 of file buffer.c.

References buffer_struct::position.

Referenced by axfr(), buffer_write_rr(), ixfr(), query_add_optional(), query_add_rr(), tsig_rr_append(), tsig_rr_find(), and tsig_rr_parse().

◆ buffer_rcode2str()

const char* buffer_rcode2str ( ldns_pkt_rcode  rcode)

Look up a descriptive text by each rcode.

Parameters
[in]rcodercode
Returns
const char* descriptive text

Look up a descriptive text by each rcode.

Definition at line 978 of file buffer.c.

References ods_rcode_str.

◆ buffer_read()

void buffer_read ( buffer_type buffer,
void *  data,
size_t  count 
)

Read from buffer.

Parameters
[in]bufferbuffer
[in]dataread data
[in]countnumber of bytes to read

Read from buffer.

Definition at line 692 of file buffer.c.

◆ buffer_read_dname()

size_t buffer_read_dname ( buffer_type buffer,
uint8_t *  dname,
unsigned  allow_pointers 
)

Read dname from buffer.

Parameters
[in]bufferbuffer
[out]dnamedname
[in]allow_pointersallow pointer labels
Returns
int dname length

Read dname from buffer.

Definition at line 246 of file buffer.c.

References buffer_available(), buffer_limit(), and MAX_PACKET_SIZE.

◆ buffer_read_u16()

uint16_t buffer_read_u16 ( buffer_type buffer)

Read uint16_t from buffer.

Parameters
[in]bufferbuffer
Returns
uint16_t read data

Read uint16_t from buffer.

Definition at line 721 of file buffer.c.

Referenced by buffer_skip_rr().

◆ buffer_read_u32()

uint32_t buffer_read_u32 ( buffer_type buffer)

Read uint32_t from buffer.

Parameters
[in]bufferbuffer
Returns
uint32_t read data

Read uint32_t from buffer.

Definition at line 736 of file buffer.c.

◆ buffer_read_u8()

uint8_t buffer_read_u8 ( buffer_type buffer)

Read uint8_t from buffer.

Parameters
[in]bufferbuffer
Returns
uint8_t read data

Read uint8_t from buffer.

Definition at line 706 of file buffer.c.

Referenced by buffer_skip_dname().

◆ buffer_remaining()

size_t buffer_remaining ( buffer_type buffer)

The number of bytes remaining between the buffer's position and limit.

Parameters
[in]bufferbuffer
Returns
size_t remaining number of bytes

The number of bytes remaining between the buffer's position and limit.

Definition at line 463 of file buffer.c.

Referenced by query_process(), and tcp_conn_write().

◆ buffer_set_limit()

void buffer_set_limit ( buffer_type buffer,
size_t  limit 
)

Set the buffer's limit. If the buffer's position is greater than the new limit, the position is set to the limit.

Parameters
[in]bufferbuffer
[in]limitlimit

Set the buffer's limit.

Definition at line 385 of file buffer.c.

References buffer_struct::limit, and buffer_struct::position.

Referenced by axfr(), ixfr(), and query_prepare().

◆ buffer_set_position()

void buffer_set_position ( buffer_type buffer,
size_t  pos 
)

Set the buffer's position. The position must be less than or equal to the buffer's limit.

Parameters
[in]bufferbuffer
[in]posposition

Set the buffer's position.

Definition at line 137 of file buffer.c.

References buffer_struct::position.

Referenced by axfr(), buffer_write_rr(), ixfr(), query_prepare(), tsig_rr_find(), and tsig_rr_parse().

◆ buffer_skip()

void buffer_skip ( buffer_type buffer,
ssize_t  count 
)

Change the buffer's position. The position must not be moved behind the buffer's limit or before the beginning of the buffer.

Parameters
[in]bufferbuffer
[in]countnumber of bytes to skip

Change the buffer's position.

Definition at line 150 of file buffer.c.

Referenced by buffer_skip_dname(), buffer_skip_rr(), buffer_write_rr(), query_add_rr(), tcp_conn_write(), and tsig_rr_append().

◆ buffer_skip_dname()

int buffer_skip_dname ( buffer_type buffer)

Change the buffer's position so that one dname is skipped.

Parameters
[in]bufferbuffer
Returns
int 0 if dname skipping failed 1 otherwise

Change the buffer's position so that one dname is skipped.

Definition at line 310 of file buffer.c.

References buffer_available(), buffer_read_u8(), and buffer_skip().

Referenced by buffer_skip_rr(), and tsig_rr_parse().

◆ buffer_skip_rr()

int buffer_skip_rr ( buffer_type buffer,
unsigned  qrr 
)

Change the buffer's position so that one RR is skipped.

Parameters
[in]bufferbuffer
[in]qrr1 if we skip RRs in the question section.
Returns
int 0 if RR skipping failed 1 otherwise

Change the buffer's position so that one RR is skipped.

Definition at line 342 of file buffer.c.

References buffer_available(), buffer_read_u16(), buffer_skip(), and buffer_skip_dname().

Referenced by tsig_rr_find().

◆ buffer_write()

void buffer_write ( buffer_type buffer,
const void *  data,
size_t  count 
)

Write to buffer.

Parameters
[in]bufferbuffer
[in]datadata to write
[in]countnumber of bytes to write

Write to buffer.

Definition at line 538 of file buffer.c.

Referenced by buffer_write_rdf(), query_add_optional(), and tsig_rr_append().

◆ buffer_write_rdf()

void buffer_write_rdf ( buffer_type buffer,
ldns_rdf *  rdf 
)

Write rdf to buffer.

Parameters
[in]bufferbuffer
[in]rdfdata to write

Write rdf to buffer.

Definition at line 591 of file buffer.c.

References buffer_write().

Referenced by buffer_write_rr(), query_add_rr(), and tsig_rr_append().

◆ buffer_write_rr()

int buffer_write_rr ( buffer_type buffer,
ldns_rr *  rr 
)

Write rr to buffer.

Parameters
[in]bufferbuffer
[in]rrdata to write
Returns
int 1 if rr fits, 0 otherwise

Write rr to buffer.

Definition at line 605 of file buffer.c.

References buffer_available(), buffer_position(), buffer_set_position(), buffer_skip(), buffer_write_rdf(), buffer_write_u16(), buffer_write_u16_at(), and buffer_write_u32().

◆ buffer_write_u16()

void buffer_write_u16 ( buffer_type buffer,
uint16_t  data 
)

Write uint16_t to buffer.

Parameters
[in]bufferbuffer
[in]datadata to write

Write uint16_t to buffer.

Definition at line 565 of file buffer.c.

References buffer_write_u16_at(), and buffer_struct::position.

Referenced by buffer_write_rr(), query_add_rr(), and tsig_rr_append().

◆ buffer_write_u16_at()

void buffer_write_u16_at ( buffer_type buffer,
size_t  at,
uint16_t  data 
)

Write uint16_t to buffer at indicated position.

Parameters
[in]bufferbuffer
[in]atindicated position
[in]datadata to write

Write to buffer at indicated position.

Definition at line 512 of file buffer.c.

Referenced by buffer_pkt_set_flags(), buffer_write_rr(), buffer_write_u16(), and tsig_rr_append().

◆ buffer_write_u32()

void buffer_write_u32 ( buffer_type buffer,
uint32_t  data 
)

Write uint32_t to buffer.

Parameters
[in]bufferbuffer
[in]datadata to write

Write uint32_t to buffer.

Definition at line 578 of file buffer.c.

Referenced by buffer_write_rr(), query_add_rr(), and tsig_rr_append().

◆ buffer_write_u8()

void buffer_write_u8 ( buffer_type buffer,
uint8_t  data 
)

Write uint8_t to buffer.

Parameters
[in]bufferbuffer
[in]datadata to write

Write uint8_t to buffer.

Definition at line 552 of file buffer.c.

Referenced by tsig_rr_append().

Variable Documentation

◆ ods_rcode_str

ods_lookup_table ods_rcode_str[]

Definition at line 57 of file buffer.c.

Referenced by buffer_rcode2str().