packet.h File Reference

Contains the definition of ldns_pkt and its parts, as well as functions to manipulate those. More...

Go to the source code of this file.

Data Structures

struct  ldns_struct_hdr
 Header of a dns packet. More...
struct  ldns_struct_pkt
 DNS packet. More...

Defines

#define LDNS_MAX_PACKETLEN   65535
#define LDNS_QR   1
#define LDNS_AA   2
#define LDNS_TC   4
#define LDNS_RD   8
#define LDNS_CD   16
#define LDNS_RA   32
#define LDNS_AD   64

Typedefs

typedef enum ldns_enum_pkt_opcode ldns_pkt_opcode
typedef enum ldns_enum_pkt_rcode ldns_pkt_rcode
typedef struct ldns_struct_hdr ldns_hdr
typedef struct ldns_struct_pkt ldns_pkt
typedef enum ldns_enum_pkt_section ldns_pkt_section
typedef enum ldns_enum_pkt_type ldns_pkt_type

Enumerations

enum  ldns_enum_pkt_opcode {
  LDNS_PACKET_QUERY = 0, LDNS_PACKET_IQUERY = 1, LDNS_PACKET_STATUS = 2, LDNS_PACKET_NOTIFY = 4,
  LDNS_PACKET_UPDATE = 5
}
enum  ldns_enum_pkt_rcode {
  LDNS_RCODE_NOERROR = 0, LDNS_RCODE_FORMERR = 1, LDNS_RCODE_SERVFAIL = 2, LDNS_RCODE_NXDOMAIN = 3,
  LDNS_RCODE_NOTIMPL = 4, LDNS_RCODE_REFUSED = 5, LDNS_RCODE_YXDOMAIN = 6, LDNS_RCODE_YXRRSET = 7,
  LDNS_RCODE_NXRRSET = 8, LDNS_RCODE_NOTAUTH = 9, LDNS_RCODE_NOTZONE = 10
}
enum  ldns_enum_pkt_section {
  LDNS_SECTION_QUESTION = 0, LDNS_SECTION_ANSWER = 1, LDNS_SECTION_AUTHORITY = 2, LDNS_SECTION_ADDITIONAL = 3,
  LDNS_SECTION_ANY = 4, LDNS_SECTION_ANY_NOQUESTION = 5
}
 

The sections of a packet.

More...
enum  ldns_enum_pkt_type {
  LDNS_PACKET_QUESTION, LDNS_PACKET_REFERRAL, LDNS_PACKET_ANSWER, LDNS_PACKET_NXDOMAIN,
  LDNS_PACKET_NODATA, LDNS_PACKET_UNKNOWN
}
 

The different types of packets.

More...

Functions

uint16_t ldns_pkt_id (const ldns_pkt *p)
 Read the packet id.
bool ldns_pkt_qr (const ldns_pkt *p)
 Read the packet's qr bit.
bool ldns_pkt_aa (const ldns_pkt *p)
 Read the packet's aa bit.
bool ldns_pkt_tc (const ldns_pkt *p)
 Read the packet's tc bit.
bool ldns_pkt_rd (const ldns_pkt *p)
 Read the packet's rd bit.
bool ldns_pkt_cd (const ldns_pkt *p)
 Read the packet's cd bit.
bool ldns_pkt_ra (const ldns_pkt *p)
 Read the packet's ra bit.
bool ldns_pkt_ad (const ldns_pkt *p)
 Read the packet's ad bit.
ldns_pkt_opcode ldns_pkt_get_opcode (const ldns_pkt *p)
 Read the packet's code.
ldns_pkt_rcode ldns_pkt_get_rcode (const ldns_pkt *p)
 Return the packet's respons code.
uint16_t ldns_pkt_qdcount (const ldns_pkt *p)
 Return the packet's qd count.
uint16_t ldns_pkt_ancount (const ldns_pkt *p)
 Return the packet's an count.
uint16_t ldns_pkt_nscount (const ldns_pkt *p)
 Return the packet's ns count.
uint16_t ldns_pkt_arcount (const ldns_pkt *p)
 Return the packet's ar count.
ldns_rdfldns_pkt_answerfrom (const ldns_pkt *p)
 Return the packet's answerfrom.
struct timeval ldns_pkt_timestamp (const ldns_pkt *p)
 Return the packet's timestamp.
uint32_t ldns_pkt_querytime (const ldns_pkt *p)
 Return the packet's querytime.
size_t ldns_pkt_size (const ldns_pkt *p)
 Return the packet's size in bytes.
ldns_rrldns_pkt_tsig (const ldns_pkt *p)
 Return the packet's tsig pseudo rr's.
ldns_rr_listldns_pkt_question (const ldns_pkt *p)
 Return the packet's question section.
ldns_rr_listldns_pkt_answer (const ldns_pkt *p)
 Return the packet's answer section.
ldns_rr_listldns_pkt_authority (const ldns_pkt *p)
 Return the packet's authority section.
ldns_rr_listldns_pkt_additional (const ldns_pkt *p)
 Return the packet's additional section.
ldns_rr_listldns_pkt_all (const ldns_pkt *p)
 Return the packet's question, answer, authority and additional sections concatenated, in a new rr_list clone.
ldns_rr_listldns_pkt_all_noquestion (const ldns_pkt *p)
 Return the packet's answer, authority and additional sections concatenated, in a new rr_list clone.
ldns_rr_listldns_pkt_get_section_clone (const ldns_pkt *p, ldns_pkt_section s)
 return all the rr_list's in the packet.
ldns_rr_listldns_pkt_rr_list_by_name (ldns_pkt *p, ldns_rdf *r, ldns_pkt_section s)
 return all the rr with a specific name from a packet.
ldns_rr_listldns_pkt_rr_list_by_type (const ldns_pkt *p, ldns_rr_type t, ldns_pkt_section s)
 return all the rr with a specific type from a packet.
ldns_rr_listldns_pkt_rr_list_by_name_and_type (const ldns_pkt *packet, const ldns_rdf *ownername, ldns_rr_type type, ldns_pkt_section sec)
 return all the rr with a specific type and type from a packet.
bool ldns_pkt_rr (ldns_pkt *pkt, ldns_pkt_section sec, ldns_rr *rr)
 check to see if an rr exist in the packet
bool ldns_pkt_set_flags (ldns_pkt *pkt, uint16_t flags)
 sets the flags in a packet.
void ldns_pkt_set_id (ldns_pkt *p, uint16_t id)
 Set the packet's id.
void ldns_pkt_set_random_id (ldns_pkt *p)
 Set the packet's id to a random value.
void ldns_pkt_set_qr (ldns_pkt *p, bool b)
 Set the packet's qr bit.
void ldns_pkt_set_aa (ldns_pkt *p, bool b)
 Set the packet's aa bit.
void ldns_pkt_set_tc (ldns_pkt *p, bool b)
 Set the packet's tc bit.
void ldns_pkt_set_rd (ldns_pkt *p, bool b)
 Set the packet's rd bit.
void ldns_pkt_set_cd (ldns_pkt *p, bool b)
 Set the packet's cd bit.
void ldns_pkt_set_ra (ldns_pkt *p, bool b)
 Set the packet's ra bit.
void ldns_pkt_set_ad (ldns_pkt *p, bool b)
 Set the packet's ad bit.
void ldns_pkt_set_opcode (ldns_pkt *p, ldns_pkt_opcode c)
 Set the packet's opcode.
void ldns_pkt_set_rcode (ldns_pkt *p, uint8_t c)
 Set the packet's respons code.
void ldns_pkt_set_qdcount (ldns_pkt *p, uint16_t c)
 Set the packet's qd count.
void ldns_pkt_set_ancount (ldns_pkt *p, uint16_t c)
 Set the packet's an count.
void ldns_pkt_set_nscount (ldns_pkt *p, uint16_t c)
 Set the packet's ns count.
void ldns_pkt_set_arcount (ldns_pkt *p, uint16_t c)
 Set the packet's arcount.
void ldns_pkt_set_answerfrom (ldns_pkt *p, ldns_rdf *r)
 Set the packet's answering server.
void ldns_pkt_set_querytime (ldns_pkt *p, uint32_t t)
 Set the packet's query time.
void ldns_pkt_set_size (ldns_pkt *p, size_t s)
 Set the packet's size.
void ldns_pkt_set_timestamp (ldns_pkt *p, struct timeval timeval)
 Set the packet's timestamp.
void ldns_pkt_set_section_count (ldns_pkt *p, ldns_pkt_section s, uint16_t x)
 Set a packet's section count to x.
void ldns_pkt_set_tsig (ldns_pkt *p, ldns_rr *t)
 Set the packet's tsig rr.
ldns_pkt_type ldns_pkt_reply_type (ldns_pkt *p)
 looks inside the packet to determine what kind of packet it is, AUTH, NXDOMAIN, REFERRAL, etc.
uint16_t ldns_pkt_edns_udp_size (const ldns_pkt *packet)
 return the packet's edns udp size
uint8_t ldns_pkt_edns_extended_rcode (const ldns_pkt *packet)
 return the packet's edns extended rcode
uint8_t ldns_pkt_edns_version (const ldns_pkt *packet)
 return the packet's edns version
uint16_t ldns_pkt_edns_z (const ldns_pkt *packet)
 return the packet's edns z value
ldns_rdfldns_pkt_edns_data (const ldns_pkt *packet)
 return the packet's edns data
bool ldns_pkt_edns_do (const ldns_pkt *packet)
 return the packet's edns do bit
void ldns_pkt_set_edns_do (ldns_pkt *packet, bool value)
 Set the packet's edns do bit.
bool ldns_pkt_edns (const ldns_pkt *packet)
 returns true if this packet needs and EDNS rr to be sent.
void ldns_pkt_set_edns_udp_size (ldns_pkt *packet, uint16_t s)
 Set the packet's edns udp size.
void ldns_pkt_set_edns_extended_rcode (ldns_pkt *packet, uint8_t c)
 Set the packet's edns extended rcode.
void ldns_pkt_set_edns_version (ldns_pkt *packet, uint8_t v)
 Set the packet's edns version.
void ldns_pkt_set_edns_z (ldns_pkt *packet, uint16_t z)
 Set the packet's edns z value.
void ldns_pkt_set_edns_data (ldns_pkt *packet, ldns_rdf *data)
 Set the packet's edns data.
ldns_pktldns_pkt_new ()
 allocates and initializes a ldns_pkt structure.
void ldns_pkt_free (ldns_pkt *packet)
 frees the packet structure and all data that it contains.
ldns_status ldns_pkt_query_new_frm_str (ldns_pkt **p, const char *rr_name, ldns_rr_type rr_type, ldns_rr_class rr_class, uint16_t flags)
 creates a query packet for the given name, type, class.
ldns_pktldns_pkt_query_new (ldns_rdf *rr_name, ldns_rr_type rr_type, ldns_rr_class rr_class, uint16_t flags)
 creates a packet with a query in it for the given name, type and class.
ldns_pktldns_pkt_clone (ldns_pkt *pkt)
 clones the given packet, creating a fully allocated copy
void ldns_pkt_set_additional (ldns_pkt *p, ldns_rr_list *rr)
 directly set the additional section
void ldns_pkt_set_answer (ldns_pkt *p, ldns_rr_list *rr)
 directly set the answer section
void ldns_pkt_set_question (ldns_pkt *p, ldns_rr_list *rr)
 directly set the question section
void ldns_pkt_set_authority (ldns_pkt *p, ldns_rr_list *rr)
 directly set the auhority section
bool ldns_pkt_push_rr (ldns_pkt *packet, ldns_pkt_section section, ldns_rr *rr)
 push an rr on a packet
bool ldns_pkt_safe_push_rr (ldns_pkt *pkt, ldns_pkt_section sec, ldns_rr *rr)
 push an rr on a packet, provided the RR is not there.
bool ldns_pkt_push_rr_list (ldns_pkt *packet, ldns_pkt_section section, ldns_rr_list *list)
 push a rr_list on a packet
bool ldns_pkt_safe_push_rr_list (ldns_pkt *pkt, ldns_pkt_section sec, ldns_rr_list *list)
 push an rr_list to a packet, provided the RRs are not already there.
bool ldns_pkt_empty (ldns_pkt *p)
 check if a packet is empty

Detailed Description

Contains the definition of ldns_pkt and its parts, as well as functions to manipulate those.

Definition in file packet.h.


Define Documentation

#define LDNS_MAX_PACKETLEN   65535

Definition at line 24 of file packet.h.

#define LDNS_QR   1

Definition at line 27 of file packet.h.

#define LDNS_AA   2

Definition at line 28 of file packet.h.

#define LDNS_TC   4

Definition at line 29 of file packet.h.

#define LDNS_RD   8

Definition at line 30 of file packet.h.

#define LDNS_CD   16

Definition at line 31 of file packet.h.

#define LDNS_RA   32

Definition at line 32 of file packet.h.

#define LDNS_AD   64

Definition at line 33 of file packet.h.


Typedef Documentation

Definition at line 52 of file packet.h.

Definition at line 68 of file packet.h.

typedef struct ldns_struct_hdr ldns_hdr

Definition at line 223 of file packet.h.

typedef struct ldns_struct_pkt ldns_pkt

Definition at line 267 of file packet.h.

Definition at line 282 of file packet.h.

Definition at line 295 of file packet.h.


Enumeration Type Documentation

Enumerator:
LDNS_PACKET_QUERY 
LDNS_PACKET_IQUERY 
LDNS_PACKET_STATUS 
LDNS_PACKET_NOTIFY 
LDNS_PACKET_UPDATE 

Definition at line 45 of file packet.h.

Enumerator:
LDNS_RCODE_NOERROR 
LDNS_RCODE_FORMERR 
LDNS_RCODE_SERVFAIL 
LDNS_RCODE_NXDOMAIN 
LDNS_RCODE_NOTIMPL 
LDNS_RCODE_REFUSED 
LDNS_RCODE_YXDOMAIN 
LDNS_RCODE_YXRRSET 
LDNS_RCODE_NXRRSET 
LDNS_RCODE_NOTAUTH 
LDNS_RCODE_NOTZONE 

Definition at line 55 of file packet.h.

The sections of a packet.

Enumerator:
LDNS_SECTION_QUESTION 
LDNS_SECTION_ANSWER 
LDNS_SECTION_AUTHORITY 
LDNS_SECTION_ADDITIONAL 
LDNS_SECTION_ANY 

bogus section, if not interested

LDNS_SECTION_ANY_NOQUESTION 

used to get all non-question rrs from a packet

Definition at line 272 of file packet.h.

The different types of packets.

Enumerator:
LDNS_PACKET_QUESTION 
LDNS_PACKET_REFERRAL 
LDNS_PACKET_ANSWER 
LDNS_PACKET_NXDOMAIN 
LDNS_PACKET_NODATA 
LDNS_PACKET_UNKNOWN 

Definition at line 287 of file packet.h.


Function Documentation

uint16_t ldns_pkt_id ( const ldns_pkt p  ) 

Read the packet id.

Parameters:
[in] p the packet
Returns:
the packet id

Definition at line 39 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_id.

bool ldns_pkt_qr ( const ldns_pkt p  ) 

Read the packet's qr bit.

Parameters:
[in] p the packet
Returns:
value of the bit

Definition at line 45 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_qr.

bool ldns_pkt_aa ( const ldns_pkt p  ) 

Read the packet's aa bit.

Parameters:
[in] p the packet
Returns:
value of the bit

Definition at line 51 of file packet.c.

References ldns_struct_hdr::_aa, and ldns_struct_pkt::_header.

bool ldns_pkt_tc ( const ldns_pkt p  ) 

Read the packet's tc bit.

Parameters:
[in] p the packet
Returns:
value of the bit

Definition at line 57 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_tc.

bool ldns_pkt_rd ( const ldns_pkt p  ) 

Read the packet's rd bit.

Parameters:
[in] p the packet
Returns:
value of the bit

Definition at line 63 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_rd.

bool ldns_pkt_cd ( const ldns_pkt p  ) 

Read the packet's cd bit.

Parameters:
[in] p the packet
Returns:
value of the bit

Definition at line 69 of file packet.c.

References ldns_struct_hdr::_cd, and ldns_struct_pkt::_header.

bool ldns_pkt_ra ( const ldns_pkt p  ) 

Read the packet's ra bit.

Parameters:
[in] p the packet
Returns:
value of the bit

Definition at line 75 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_ra.

bool ldns_pkt_ad ( const ldns_pkt p  ) 

Read the packet's ad bit.

Parameters:
[in] p the packet
Returns:
value of the bit

Definition at line 81 of file packet.c.

References ldns_struct_hdr::_ad, and ldns_struct_pkt::_header.

ldns_pkt_opcode ldns_pkt_get_opcode ( const ldns_pkt p  ) 

Read the packet's code.

Parameters:
[in] p the packet
Returns:
the opcode

Definition at line 87 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_opcode.

ldns_pkt_rcode ldns_pkt_get_rcode ( const ldns_pkt p  ) 

Return the packet's respons code.

Parameters:
[in] p the packet
Returns:
the respons code

Definition at line 93 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_rcode.

uint16_t ldns_pkt_qdcount ( const ldns_pkt p  ) 

Return the packet's qd count.

Parameters:
[in] p the packet
Returns:
the qd count

Definition at line 99 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_qdcount.

uint16_t ldns_pkt_ancount ( const ldns_pkt p  ) 

Return the packet's an count.

Parameters:
[in] p the packet
Returns:
the an count

Definition at line 105 of file packet.c.

References ldns_struct_hdr::_ancount, and ldns_struct_pkt::_header.

uint16_t ldns_pkt_nscount ( const ldns_pkt p  ) 

Return the packet's ns count.

Parameters:
[in] p the packet
Returns:
the ns count

Definition at line 111 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_nscount.

uint16_t ldns_pkt_arcount ( const ldns_pkt p  ) 

Return the packet's ar count.

Parameters:
[in] p the packet
Returns:
the ar count

Definition at line 117 of file packet.c.

References ldns_struct_hdr::_arcount, and ldns_struct_pkt::_header.

ldns_rdf* ldns_pkt_answerfrom ( const ldns_pkt p  ) 

Return the packet's answerfrom.

Parameters:
[in] p packet
Returns:
the name of the server

Definition at line 194 of file packet.c.

References ldns_struct_pkt::_answerfrom.

struct timeval ldns_pkt_timestamp ( const ldns_pkt p  )  [read]

Return the packet's timestamp.

Parameters:
[in] p the packet
Returns:
the timestamp

Definition at line 200 of file packet.c.

uint32_t ldns_pkt_querytime ( const ldns_pkt p  ) 

Return the packet's querytime.

Parameters:
[in] p the packet
Returns:
the querytime

Definition at line 188 of file packet.c.

References ldns_struct_pkt::_querytime.

size_t ldns_pkt_size ( const ldns_pkt p  ) 

Return the packet's size in bytes.

Parameters:
[in] p the packet
Returns:
the size

Definition at line 182 of file packet.c.

References ldns_struct_pkt::_size.

ldns_rr* ldns_pkt_tsig ( const ldns_pkt p  ) 

Return the packet's tsig pseudo rr's.

Parameters:
[in] p the packet
Returns:
the tsig rr

Definition at line 444 of file packet.c.

References ldns_struct_pkt::_tsig_rr.

ldns_rr_list* ldns_pkt_question ( const ldns_pkt p  ) 

Return the packet's question section.

Parameters:
[in] p the packet
Returns:
the section

Definition at line 123 of file packet.c.

References ldns_struct_pkt::_question.

ldns_rr_list* ldns_pkt_answer ( const ldns_pkt p  ) 

Return the packet's answer section.

Parameters:
[in] p the packet
Returns:
the section

Definition at line 129 of file packet.c.

References ldns_struct_pkt::_answer.

ldns_rr_list* ldns_pkt_authority ( const ldns_pkt p  ) 

Return the packet's authority section.

Parameters:
[in] p the packet
Returns:
the section

Definition at line 135 of file packet.c.

References ldns_struct_pkt::_authority.

ldns_rr_list* ldns_pkt_additional ( const ldns_pkt p  ) 

Return the packet's additional section.

Parameters:
[in] p the packet
Returns:
the section

Definition at line 141 of file packet.c.

References ldns_struct_pkt::_additional.

ldns_rr_list* ldns_pkt_all ( const ldns_pkt p  ) 

Return the packet's question, answer, authority and additional sections concatenated, in a new rr_list clone.

Parameters:
[in] p the packet
Returns:
the rrs

Definition at line 148 of file packet.c.

References ldns_pkt_additional(), ldns_pkt_answer(), ldns_pkt_authority(), ldns_pkt_question(), ldns_rr_list_cat_clone(), and ldns_rr_list_deep_free().

ldns_rr_list* ldns_pkt_all_noquestion ( const ldns_pkt p  ) 

Return the packet's answer, authority and additional sections concatenated, in a new rr_list clone.

Like ldns_pkt_all but without the questions.

Parameters:
[in] p the packet
Returns:
the rrs except the question rrs

Definition at line 167 of file packet.c.

References ldns_pkt_additional(), ldns_pkt_answer(), ldns_pkt_authority(), ldns_rr_list_cat_clone(), and ldns_rr_list_deep_free().

ldns_rr_list* ldns_pkt_get_section_clone ( const ldns_pkt p,
ldns_pkt_section  s 
)

return all the rr_list's in the packet.

Clone the lists, instead of returning pointers.

Parameters:
[in] p the packet to look in
[in] s what section(s) to return
Returns:
ldns_rr_list with the rr's or NULL if none were found

Definition at line 423 of file packet.c.

References ldns_pkt_additional(), ldns_pkt_all(), ldns_pkt_all_noquestion(), ldns_pkt_answer(), ldns_pkt_authority(), ldns_pkt_question(), ldns_rr_list_clone(), LDNS_SECTION_ADDITIONAL, LDNS_SECTION_ANSWER, LDNS_SECTION_ANY, LDNS_SECTION_ANY_NOQUESTION, LDNS_SECTION_AUTHORITY, and LDNS_SECTION_QUESTION.

ldns_rr_list* ldns_pkt_rr_list_by_name ( ldns_pkt p,
ldns_rdf r,
ldns_pkt_section  s 
)

return all the rr with a specific name from a packet.

Optionally specify from which section in the packet

Parameters:
[in] p the packet
[in] r the name
[in] s the packet's section
Returns:
a list with the rr's or NULL if none were found

Definition at line 253 of file packet.c.

References ldns_pkt_get_section_clone(), ldns_rdf_compare(), ldns_rr_list_new(), ldns_rr_list_push_rr(), ldns_rr_list_rr(), ldns_rr_list_rr_count(), and ldns_rr_owner().

ldns_rr_list* ldns_pkt_rr_list_by_type ( const ldns_pkt p,
ldns_rr_type  t,
ldns_pkt_section  s 
)

return all the rr with a specific type from a packet.

Optionally specify from which section in the packet

Parameters:
[in] p the packet
[in] t the type
[in] s the packet's section
Returns:
a list with the rr's or NULL if none were found

Definition at line 284 of file packet.c.

References ldns_pkt_get_section_clone(), ldns_rr_clone(), ldns_rr_get_type(), ldns_rr_list_deep_free(), ldns_rr_list_free(), ldns_rr_list_new(), ldns_rr_list_push_rr(), ldns_rr_list_rr(), and ldns_rr_list_rr_count().

ldns_rr_list* ldns_pkt_rr_list_by_name_and_type ( const ldns_pkt packet,
const ldns_rdf ownername,
ldns_rr_type  type,
ldns_pkt_section  sec 
)

return all the rr with a specific type and type from a packet.

Optionally specify from which section in the packet

Parameters:
[in] packet the packet
[in] ownername the name
[in] type the type
[in] sec the packet's section
Returns:
a list with the rr's or NULL if none were found

Definition at line 320 of file packet.c.

References ldns_pkt_get_section_clone(), ldns_rdf_compare(), ldns_rr_clone(), ldns_rr_get_type(), ldns_rr_list_deep_free(), ldns_rr_list_free(), ldns_rr_list_new(), ldns_rr_list_push_rr(), ldns_rr_list_rr(), ldns_rr_list_rr_count(), and ldns_rr_owner().

bool ldns_pkt_rr ( ldns_pkt pkt,
ldns_pkt_section  sec,
ldns_rr rr 
)

check to see if an rr exist in the packet

Parameters:
[in] pkt the packet to examine
[in] sec in which section to look
[in] rr the rr to look for

Definition at line 357 of file packet.c.

References ldns_pkt_additional(), ldns_pkt_answer(), ldns_pkt_authority(), ldns_pkt_question(), ldns_rr_list_contains_rr(), LDNS_SECTION_ADDITIONAL, LDNS_SECTION_ANSWER, LDNS_SECTION_ANY, LDNS_SECTION_ANY_NOQUESTION, LDNS_SECTION_AUTHORITY, and LDNS_SECTION_QUESTION.

bool ldns_pkt_set_flags ( ldns_pkt pkt,
uint16_t  flags 
)

sets the flags in a packet.

Parameters:
[in] pkt the packet to operate on
[in] flags ORed values: LDNS_QR| LDNS_AR for instance
Returns:
true on success otherwise false

Definition at line 800 of file packet.c.

References LDNS_AA, LDNS_AD, LDNS_CD, ldns_pkt_set_aa(), ldns_pkt_set_ad(), ldns_pkt_set_cd(), ldns_pkt_set_qr(), ldns_pkt_set_ra(), ldns_pkt_set_rd(), ldns_pkt_set_tc(), LDNS_QR, LDNS_RA, LDNS_RD, and LDNS_TC.

void ldns_pkt_set_id ( ldns_pkt p,
uint16_t  id 
)

Set the packet's id.

Parameters:
[in] p the packet
[in] id the id to set

Definition at line 450 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_id.

void ldns_pkt_set_random_id ( ldns_pkt p  ) 

Set the packet's id to a random value.

Parameters:
[in] p the packet

Definition at line 456 of file packet.c.

References ldns_get_random(), and ldns_pkt_set_id().

void ldns_pkt_set_qr ( ldns_pkt p,
bool  b 
)

Set the packet's qr bit.

Parameters:
[in] p the packet
[in] b the value to set (boolean)

Definition at line 464 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_qr.

void ldns_pkt_set_aa ( ldns_pkt p,
bool  b 
)

Set the packet's aa bit.

Parameters:
[in] p the packet
[in] b the value to set (boolean)

Definition at line 470 of file packet.c.

References ldns_struct_hdr::_aa, and ldns_struct_pkt::_header.

void ldns_pkt_set_tc ( ldns_pkt p,
bool  b 
)

Set the packet's tc bit.

Parameters:
[in] p the packet
[in] b the value to set (boolean)

Definition at line 476 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_tc.

void ldns_pkt_set_rd ( ldns_pkt p,
bool  b 
)

Set the packet's rd bit.

Parameters:
[in] p the packet
[in] b the value to set (boolean)

Definition at line 482 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_rd.

void ldns_pkt_set_cd ( ldns_pkt p,
bool  b 
)

Set the packet's cd bit.

Parameters:
[in] p the packet
[in] b the value to set (boolean)

Definition at line 512 of file packet.c.

References ldns_struct_hdr::_cd, and ldns_struct_pkt::_header.

void ldns_pkt_set_ra ( ldns_pkt p,
bool  b 
)

Set the packet's ra bit.

Parameters:
[in] p the packet
[in] b the value to set (boolean)

Definition at line 518 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_ra.

void ldns_pkt_set_ad ( ldns_pkt p,
bool  b 
)

Set the packet's ad bit.

Parameters:
[in] p the packet
[in] b the value to set (boolean)

Definition at line 524 of file packet.c.

References ldns_struct_hdr::_ad, and ldns_struct_pkt::_header.

void ldns_pkt_set_opcode ( ldns_pkt p,
ldns_pkt_opcode  c 
)

Set the packet's opcode.

Parameters:
[in] p the packet
[in] c the opcode

Definition at line 530 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_opcode.

void ldns_pkt_set_rcode ( ldns_pkt p,
uint8_t  c 
)

Set the packet's respons code.

Parameters:
[in] p the packet
[in] c the rcode

Definition at line 536 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_rcode.

void ldns_pkt_set_qdcount ( ldns_pkt p,
uint16_t  c 
)

Set the packet's qd count.

Parameters:
[in] p the packet
[in] c the count

Definition at line 542 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_qdcount.

void ldns_pkt_set_ancount ( ldns_pkt p,
uint16_t  c 
)

Set the packet's an count.

Parameters:
[in] p the packet
[in] c the count

Definition at line 548 of file packet.c.

References ldns_struct_hdr::_ancount, and ldns_struct_pkt::_header.

void ldns_pkt_set_nscount ( ldns_pkt p,
uint16_t  c 
)

Set the packet's ns count.

Parameters:
[in] p the packet
[in] c the count

Definition at line 554 of file packet.c.

References ldns_struct_pkt::_header, and ldns_struct_hdr::_nscount.

void ldns_pkt_set_arcount ( ldns_pkt p,
uint16_t  c 
)

Set the packet's arcount.

Parameters:
[in] p the packet
[in] c the count

Definition at line 560 of file packet.c.

References ldns_struct_hdr::_arcount, and ldns_struct_pkt::_header.

void ldns_pkt_set_answerfrom ( ldns_pkt p,
ldns_rdf r 
)

Set the packet's answering server.

Parameters:
[in] p the packet
[in] r the address

Definition at line 572 of file packet.c.

References ldns_struct_pkt::_answerfrom.

void ldns_pkt_set_querytime ( ldns_pkt p,
uint32_t  t 
)

Set the packet's query time.

Parameters:
[in] p the packet
[in] t the querytime in msec

Definition at line 566 of file packet.c.

References ldns_struct_pkt::_querytime.

void ldns_pkt_set_size ( ldns_pkt p,
size_t  s 
)

Set the packet's size.

Parameters:
[in] p the packet
[in] s the size

Definition at line 585 of file packet.c.

References ldns_struct_pkt::_size.

void ldns_pkt_set_timestamp ( ldns_pkt p,
struct timeval  timeval 
)

Set the packet's timestamp.

Parameters:
[in] p the packet
[in] timeval the timestamp

Definition at line 578 of file packet.c.

References ldns_struct_pkt::timestamp.

void ldns_pkt_set_section_count ( ldns_pkt p,
ldns_pkt_section  s,
uint16_t  x 
)

Set a packet's section count to x.

Parameters:
[in] p the packet
[in] s the section
[in] x the section count

Definition at line 621 of file packet.c.

References ldns_pkt_set_ancount(), ldns_pkt_set_arcount(), ldns_pkt_set_nscount(), ldns_pkt_set_qdcount(), LDNS_SECTION_ADDITIONAL, LDNS_SECTION_ANSWER, LDNS_SECTION_ANY, LDNS_SECTION_ANY_NOQUESTION, LDNS_SECTION_AUTHORITY, and LDNS_SECTION_QUESTION.

void ldns_pkt_set_tsig ( ldns_pkt p,
ldns_rr t 
)

Set the packet's tsig rr.

Parameters:
[in] p the packet
[in] t the tsig rr

Definition at line 642 of file packet.c.

References ldns_struct_pkt::_tsig_rr.

ldns_pkt_type ldns_pkt_reply_type ( ldns_pkt p  ) 

looks inside the packet to determine what kind of packet it is, AUTH, NXDOMAIN, REFERRAL, etc.

Parameters:
[in] p the packet to examine
Returns:
the type of packet

Definition at line 1018 of file packet.c.

References LDNS_PACKET_ANSWER, LDNS_PACKET_NODATA, LDNS_PACKET_NXDOMAIN, LDNS_PACKET_REFERRAL, LDNS_PACKET_UNKNOWN, ldns_pkt_ancount(), ldns_pkt_arcount(), ldns_pkt_get_rcode(), ldns_pkt_nscount(), ldns_pkt_rr_list_by_type(), LDNS_RCODE_NXDOMAIN, ldns_rr_list_deep_free(), LDNS_RR_TYPE_NS, LDNS_RR_TYPE_SOA, and LDNS_SECTION_AUTHORITY.

uint16_t ldns_pkt_edns_udp_size ( const ldns_pkt packet  ) 

return the packet's edns udp size

Parameters:
[in] packet the packet
Returns:
the size

Definition at line 206 of file packet.c.

References ldns_struct_pkt::_edns_udp_size.

uint8_t ldns_pkt_edns_extended_rcode ( const ldns_pkt packet  ) 

return the packet's edns extended rcode

Parameters:
[in] packet the packet
Returns:
the rcode

Definition at line 212 of file packet.c.

References ldns_struct_pkt::_edns_extended_rcode.

uint8_t ldns_pkt_edns_version ( const ldns_pkt packet  ) 

return the packet's edns version

Parameters:
[in] packet the packet
Returns:
the version

Definition at line 218 of file packet.c.

References ldns_struct_pkt::_edns_version.

uint16_t ldns_pkt_edns_z ( const ldns_pkt packet  ) 

return the packet's edns z value

Parameters:
[in] packet the packet
Returns:
the z value

Definition at line 224 of file packet.c.

References ldns_struct_pkt::_edns_z.

ldns_rdf* ldns_pkt_edns_data ( const ldns_pkt packet  ) 

return the packet's edns data

Parameters:
[in] packet the packet
Returns:
the data

Definition at line 246 of file packet.c.

References ldns_struct_pkt::_edns_data.

bool ldns_pkt_edns_do ( const ldns_pkt packet  ) 

return the packet's edns do bit

Parameters:
[in] packet the packet
Returns:
the bit's value

Definition at line 230 of file packet.c.

References ldns_struct_pkt::_edns_z, and LDNS_EDNS_MASK_DO_BIT.

void ldns_pkt_set_edns_do ( ldns_pkt packet,
bool  value 
)

Set the packet's edns do bit.

Parameters:
[in] packet the packet
[in] value the bit's new value

Definition at line 236 of file packet.c.

References ldns_struct_pkt::_edns_z, and LDNS_EDNS_MASK_DO_BIT.

bool ldns_pkt_edns ( const ldns_pkt packet  ) 

returns true if this packet needs and EDNS rr to be sent.

At the moment the only reason is an expected packet size larger than 512 bytes, but for instance dnssec would be a good reason too.

Parameters:
[in] packet the packet to check
Returns:
true if packet needs edns rr

Definition at line 720 of file packet.c.

References ldns_pkt_edns_data(), ldns_pkt_edns_do(), ldns_pkt_edns_extended_rcode(), and ldns_pkt_edns_udp_size().

void ldns_pkt_set_edns_udp_size ( ldns_pkt packet,
uint16_t  s 
)

Set the packet's edns udp size.

Parameters:
[in] packet the packet
[in] s the size

Definition at line 591 of file packet.c.

References ldns_struct_pkt::_edns_udp_size.

void ldns_pkt_set_edns_extended_rcode ( ldns_pkt packet,
uint8_t  c 
)

Set the packet's edns extended rcode.

Parameters:
[in] packet the packet
[in] c the code

Definition at line 597 of file packet.c.

References ldns_struct_pkt::_edns_extended_rcode.

void ldns_pkt_set_edns_version ( ldns_pkt packet,
uint8_t  v 
)

Set the packet's edns version.

Parameters:
[in] packet the packet
[in] v the version

Definition at line 603 of file packet.c.

References ldns_struct_pkt::_edns_version.

void ldns_pkt_set_edns_z ( ldns_pkt packet,
uint16_t  z 
)

Set the packet's edns z value.

Parameters:
[in] packet the packet
[in] z the value

Definition at line 609 of file packet.c.

References ldns_struct_pkt::_edns_z.

void ldns_pkt_set_edns_data ( ldns_pkt packet,
ldns_rdf data 
)

Set the packet's edns data.

Parameters:
[in] packet the packet
[in] data the data

Definition at line 615 of file packet.c.

References ldns_struct_pkt::_edns_data.

ldns_pkt* ldns_pkt_new (  ) 
void ldns_pkt_free ( ldns_pkt packet  ) 

frees the packet structure and all data that it contains.

Parameters:
[in] packet The packet structure to free
Returns:
void

Definition at line 784 of file packet.c.

References ldns_struct_pkt::_additional, ldns_struct_pkt::_answer, ldns_struct_pkt::_answerfrom, ldns_struct_pkt::_authority, ldns_struct_pkt::_edns_data, ldns_struct_pkt::_header, ldns_struct_pkt::_question, ldns_struct_pkt::_tsig_rr, LDNS_FREE, ldns_rdf_deep_free(), ldns_rr_free(), and ldns_rr_list_deep_free().

ldns_status ldns_pkt_query_new_frm_str ( ldns_pkt **  p,
const char *  rr_name,
ldns_rr_type  rr_type,
ldns_rr_class  rr_class,
uint16_t  flags 
)

creates a query packet for the given name, type, class.

Parameters:
[out] p the packet to be returned
[in] rr_name the name to query for (as string)
[in] rr_type the type to query for
[in] rr_class the class to query for
[in] flags packet flags
Returns:
LDNS_STATUS_OK or a ldns_status mesg with the error

IXFR?

Definition at line 910 of file packet.c.

References ldns_struct_pkt::_tsig_rr, ldns_pkt_free(), ldns_pkt_new(), ldns_pkt_push_rr(), ldns_pkt_set_answerfrom(), ldns_pkt_set_flags(), LDNS_RR_CLASS_IN, ldns_rr_free(), ldns_rr_new(), ldns_rr_set_class(), ldns_rr_set_owner(), ldns_rr_set_question(), ldns_rr_set_type(), LDNS_RR_TYPE_A, LDNS_RR_TYPE_IXFR, LDNS_SECTION_QUESTION, LDNS_STATUS_ERR, LDNS_STATUS_MEM_ERR, LDNS_STATUS_NULL, LDNS_STATUS_OK, and ldns_str2rdf_dname().

ldns_pkt* ldns_pkt_query_new ( ldns_rdf rr_name,
ldns_rr_type  rr_type,
ldns_rr_class  rr_class,
uint16_t  flags 
)

creates a packet with a query in it for the given name, type and class.

Parameters:
[in] rr_name the name to query for
[in] rr_type the type to query for
[in] rr_class the class to query for
[in] flags packet flags
Returns:
ldns_pkt* a pointer to the new pkt

IXFR?

Definition at line 971 of file packet.c.

References ldns_struct_pkt::_tsig_rr, ldns_pkt_free(), ldns_pkt_new(), ldns_pkt_push_rr(), ldns_pkt_set_flags(), LDNS_RR_CLASS_IN, ldns_rr_new(), ldns_rr_set_class(), ldns_rr_set_owner(), ldns_rr_set_question(), ldns_rr_set_type(), LDNS_RR_TYPE_A, LDNS_RR_TYPE_IXFR, LDNS_SECTION_QUESTION, and LDNS_STATUS_OK.

ldns_pkt* ldns_pkt_clone ( ldns_pkt pkt  ) 

clones the given packet, creating a fully allocated copy

Parameters:
[in] pkt the packet to clone
Returns:
ldns_pkt* pointer to the new packet

Definition at line 1064 of file packet.c.

References ldns_struct_pkt::_additional, ldns_struct_pkt::_answer, ldns_struct_pkt::_authority, ldns_struct_pkt::_question, ldns_pkt_aa(), ldns_pkt_ad(), ldns_pkt_additional(), ldns_pkt_ancount(), ldns_pkt_answer(), ldns_pkt_answerfrom(), ldns_pkt_arcount(), ldns_pkt_authority(), ldns_pkt_cd(), ldns_pkt_edns_data(), ldns_pkt_edns_do(), ldns_pkt_edns_extended_rcode(), ldns_pkt_edns_udp_size(), ldns_pkt_edns_version(), ldns_pkt_edns_z(), ldns_pkt_get_opcode(), ldns_pkt_get_rcode(), ldns_pkt_id(), ldns_pkt_new(), ldns_pkt_nscount(), ldns_pkt_qdcount(), ldns_pkt_qr(), ldns_pkt_querytime(), ldns_pkt_question(), ldns_pkt_ra(), ldns_pkt_rd(), ldns_pkt_set_aa(), ldns_pkt_set_ad(), ldns_pkt_set_ancount(), ldns_pkt_set_answerfrom(), ldns_pkt_set_arcount(), ldns_pkt_set_cd(), ldns_pkt_set_edns_data(), ldns_pkt_set_edns_do(), ldns_pkt_set_edns_extended_rcode(), ldns_pkt_set_edns_udp_size(), ldns_pkt_set_edns_version(), ldns_pkt_set_edns_z(), ldns_pkt_set_id(), ldns_pkt_set_nscount(), ldns_pkt_set_opcode(), ldns_pkt_set_qdcount(), ldns_pkt_set_qr(), ldns_pkt_set_querytime(), ldns_pkt_set_ra(), ldns_pkt_set_rcode(), ldns_pkt_set_rd(), ldns_pkt_set_size(), ldns_pkt_set_tc(), ldns_pkt_set_tsig(), ldns_pkt_size(), ldns_pkt_tc(), ldns_pkt_tsig(), ldns_rdf_clone(), ldns_rr_clone(), ldns_rr_list_clone(), and ldns_rr_list_deep_free().

void ldns_pkt_set_additional ( ldns_pkt p,
ldns_rr_list rr 
)

directly set the additional section

Parameters:
[in] p packet to operate on
[in] rr rrlist to set

Definition at line 488 of file packet.c.

References ldns_struct_pkt::_additional.

void ldns_pkt_set_answer ( ldns_pkt p,
ldns_rr_list rr 
)

directly set the answer section

Parameters:
[in] p packet to operate on
[in] rr rrlist to set

Definition at line 500 of file packet.c.

References ldns_struct_pkt::_answer.

void ldns_pkt_set_question ( ldns_pkt p,
ldns_rr_list rr 
)

directly set the question section

Parameters:
[in] p packet to operate on
[in] rr rrlist to set

Definition at line 494 of file packet.c.

References ldns_struct_pkt::_question.

void ldns_pkt_set_authority ( ldns_pkt p,
ldns_rr_list rr 
)

directly set the auhority section

Parameters:
[in] p packet to operate on
[in] rr rrlist to set

Definition at line 506 of file packet.c.

References ldns_struct_pkt::_authority.

bool ldns_pkt_push_rr ( ldns_pkt packet,
ldns_pkt_section  section,
ldns_rr rr 
)
bool ldns_pkt_safe_push_rr ( ldns_pkt pkt,
ldns_pkt_section  sec,
ldns_rr rr 
)

push an rr on a packet, provided the RR is not there.

Parameters:
[in] pkt packet to operate on
[in] sec where to put it
[in] rr rr to push
Returns:
a boolean which is true when the rr was added

Definition at line 684 of file packet.c.

References ldns_pkt_push_rr(), and ldns_pkt_rr().

bool ldns_pkt_push_rr_list ( ldns_pkt packet,
ldns_pkt_section  section,
ldns_rr_list list 
)

push a rr_list on a packet

Parameters:
[in] packet packet to operate on
[in] section where to put it
[in] list the rr_list to push
Returns:
a boolean which is true when the rr was added

Definition at line 696 of file packet.c.

References ldns_pkt_push_rr(), ldns_rr_list_rr(), and ldns_rr_list_rr_count().

bool ldns_pkt_safe_push_rr_list ( ldns_pkt pkt,
ldns_pkt_section  sec,
ldns_rr_list list 
)

push an rr_list to a packet, provided the RRs are not already there.

Parameters:
[in] pkt packet to operate on
[in] sec where to put it
[in] list the rr_list to push
Returns:
a boolean which is true when the rr was added

Definition at line 708 of file packet.c.

References ldns_pkt_safe_push_rr(), ldns_rr_list_rr(), and ldns_rr_list_rr_count().

bool ldns_pkt_empty ( ldns_pkt p  ) 

check if a packet is empty

Parameters:
[in] p packet
Returns:
true: empty, false: not empty

Definition at line 409 of file packet.c.

References ldns_pkt_section_count(), and LDNS_SECTION_ANY.


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